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- Создано: 22-12-21
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Common problems in the manufacturing of resin bonded grinding wheels
Описание: Common problems in the manufacturing of resin bonded grinding wheels Resin abrasives is an important part of abrasives and one of the important common and important grinding tools in industrial production. In order to promote technical exchanges in the industry and help customers to solve common problems in the manufacturing process of resin grinding wheels, this article mainly introduces common problems in the manufacturing of resin bonded grinding wheels. I. Analysis of the causes of unstable quality of resin grinding wheel There are many quality problems in the production process of resin grinding wheels. Raw material problem The Resin Abrasive Wheels are complex product made from a variety of main and auxiliary raw materials including filler, reinforcing material, coloring agent etc. 1. about abrasives At present, the quality of abrasives on the market is uneven, mainly as follows: (1). The chemical specification of abrasives is often qualified, but also with poor physical properties. It is mainly shown that there is still a gap between bulk density of China and international quality material. (2). The particle distribution of some abrasives is disordered, which is quite different from the standard specification. 2. In terms of binder, mainly about phenolic resin: (1). Resin quality stability problems, especially the level of free phenol in the resin. Excessive free phenol content will accelerate the cracking of the Resin Cutting Disc after heating and hardening of the resin wheel and affect the strength of the grinding wheel; (2). The binder's particle is too thick or too fine: It is generally believed that the fine grain is benefitial to uniform distribution of the binder. If the grain is too coarse, the molding material is not easily mixed uniformly, which affects the hardness and strength of the grinding wheel. Even for the coarse-grained resin sheet cutting wheel and the cymbal grinding wheel, the size of the binder (resin powder) selected should be finer than 320#. Manufacturing process of resin grinding wheel The manufacturing of Resin Grinding Disc is a highly technical industrial process. There are many problems in the processes of materials mixing, molding, hardening, and processing. (1). Mixing process: The key of mixing is uniformity. (2). Molding process: At present, rotating material distribution mechanism is widely applied in domestic market. But due to the limitations of the rotating material distribution mechanism, the employees of some large manufacturing enterprises have no way to operate, which causes the distribution of mixed materials uneven. (3). Hardening process: This is the most critical production process. There are two factors that easily cause quality problems. One is the temperature difference among the curing oven or the firing kiln is too large. The other is improperly installed furnace. (4). Manufacture procedure (mainly large-diameter and high-thickness resin grinding wheels): Resin grinding wheels, especially with large diameters and high thicknesses, or with strict dimensional tolerance must be processed after hardening to ensure the geometric size and tolerance. (5). Apply the production formula and process parameters mechanically. Equipment tooling problem (1). Equipment problems: Production equipment is very important for grinding wheel production. Some enterprises lack equipment. (2). Tooling problems: Some of the smaller resin grinding wheel companies have weak tooling management. II. How to maintain the quality stability of resin grinding wheel This paper mainly analyzes how the raw materials with phenolic resin and glass fiber mesh affect the quality stability of the resin grinding wheel. The quality stability of the Steel Wheel is most prominent in the following two aspects: (1). The change of strength and cutting performance of resin grinding wheel within a certain period (under normal temperature and humidity conditions); (2). The variation of the strength and cutting performance of every batch of grinding wheel in the production cycle (such as different seasons in a year). The influence of raw materials on the quality stability of resin grinding wheels is mainly reflected in: a. Liquid phenolic resin. The fluctuation range of solid content, viscosity, gel time and water solubility of liquid phenolic resin has different degrees of influence on grinding wheels. Therefore, the factories must combine the product performance requirements and its own mixing, forming and hardening process to make a suitable technical index. b. Powder phenolic resin. For powder phenolic resin, the fluctuations of its flow length (fluidity), particle size (grain size, fineness), urotropine (six times) content and gelation time all will affect the quality of the grinding wheel. (3). Stability of the technical indicators of the mesh The mesh was originally applied to the resin wheel to increase the strength of the wheel. As the performance of the resin grinding wheel continues to increase, the mesh plays a very important role in the resin grinding wheel, which is mainly manifested in fluctuations in the strength of the grinding wheel, deformation of cutting Flap Disc (mainly double-wire grinding wheel), stratification of abrasive disc etc. The glue content of the mesh has an influence on the strength, viscosity and grinding performance of grinding wheel. In theory, when the production process is stable and the mesh with the higher amount of glue, the grinding wheel will be with the higher strength, the better bonding performance and the more stable cutting performance. III. The deformation of resin cutting wheel occurs frequently The deformation of the resin grinding wheel has long troubled the manufacturers. The root of the deformation is the uneven organization in the effective area of the grinding wheel, which in turn causes uneven stress in the hardening process of the product. Resin grinding wheel manufacturers should focus on solving the uniformity of the mixture, the uniformity of the molding and the stability of the mesh. Only the above three problems can be solved, the deformation problem of the resin grinding wheel (mainly the cutting wheel) will be solved.
Дата Публикации: 22-12-21
How many VCE subjects do you need to do?
Описание: How many VCE subjects do you need to do? What is the maximum number of VCE subjects? The VCE Subjects includes more than 90 subjects to choose from. Each school decides which VCE subjects they offer. Most subjects are made up of four units which your child studies over two years (one unit per semester): Units 1/2 are usually studied in year 11. What is the hardest subject in VCE? Legal Studies Is a 40 study score good? This raw study score will be a number between 0 and 50. A raw study score of 40 would mean that you performed better than around 91% of all students who took the same subject. A raw study score of 50 means that you performed in the top 0.3% of students enrolled in the subject. The subjects you choose in Year 10 affect what you can do in the future. You should go for a good balance of subjects to keep your career options open. Choosing subjects that suit you and your abilities is very important. Consider what sort of person you are To help you decide what to study in Yr 7- Yr 10 Subjects, it's a good idea to start asking yourself what sort of person you are: think about what you're like at home, as well as in school - what skills you've developed outside school ask yourself what types of things you enjoy doing the most - for example, working things out and thinking them through, practical activities or artistic options like painting, drawing or performing music think about what you are most interested in: it could be languages, writing projects, helping people, being outdoors or designing things What you want to do If you have a particular career in mind, or you are hoping to go to university, then it is worth finding out if there are specific subjects you need to study. Before choosing your GCSE subjects you should be aware of choosing subjects which may affect your choices at a later stage, for example, double award science is essential for careers related to medicine but it will also give you many other options. Making choices You'll have many options in Year 10, but there are some subjects so important that everyone has to take them. English and Maths are the subjects most often required for courses and careers. Doing as well as you possibly can in Maths and English will improve your chances of getting a job or course at a later stage. For subjects you can choose you should: make sure that you have accurate and up-to-date information talk to those who can give you good reliable advice such as your careers teacher/adviser discuss the options with your family and subject teachers There are a number of factors you should consider when you make your subject choices. Choosing the subjects you need If you know what career you want, choosing the right subjects can be critical. For example, if you are considering following a science pathway you will need at least double award science. Choosing the subjects you like and are good at Nearly everyone gets better marks in subjects they enjoy and are good at. You should take this into account, but always keep in mind your preferred course or career when you leave school. What to avoid You shouldn't choose subjects for the wrong reasons, for example: you like the teacher – the teacher may change there isn't much homework – that will change your friends are taking the subject – it might be right for them, but not for you The Education System The Japanese/Korean public education structure is divided into three parts: six years of primary school, followed by three years of middle school and then three years of high school. In 1996 only about five percent of Korea's high schools were coeducational. The proportion of coeducational schools has increased by almost ten percent. However, classes in many coeducational high schools are still divided along gender lines. The curriculum is standardized so now both boys and girls study technology and domestic science. The primary curriculum consists of nine principal subjects: moral education, Korean language, social studies, mathematics, science, physical education, music, fine arts, and practical arts. English-language instruction now begins in the third grade, so that children can start learning English in a relaxed atmosphere through conversational exchange, rather than through rote learning of grammatical rules as is still the practice in many middle and high schools. The major objectives, as stated in a 1996 background report by the Ministry of Education, are "to improve basic abilities, skills and attitudes; to develop language ability and civic morality needed to live in society; to increase the spirit of cooperation; to foster basic arithmetic skills and scientific observation skills; and to promote the understanding of healthy life and the harmonious development of body and mind." The seventh annual curriculum, which began implementation in March 2000, kept these basic goals but updated many elements to reflect changes in Korean society. Upon completion of primary school, students advance to middle school, which comprises grades seven through nine. The curriculum consists of 12 basic or required subjects, electives, and extracurricular activities. While elementary school instructors teach all subjects, middle school teachers, like their colleagues in the United States, are content specialists. High schools are divided into academic and vocational schools. In 1995, some 62 percent of students were enrolled in academic high schools and 38 percent in vocational high schools. A small number attended specialized high schools concentrating in science, the arts, foreign languages, and other specialized fields. This is still the case. Which IB subjects should I choose? Your IB Subjects choices are one of the first big decisions you have to make when embarking on your IB journey (and beyond). We have put together this article to help guide you through which subjects you may want to take and what the deciding factors could be. We hope you enjoy! We know that choosing IB subjects can be daunting, but, remember that this, firstly, is an experience to enjoy. You have the freedom to study what you want, which puts you in a position of a little more independence. No longer do you have to study Geography or P.E. or Chemistry! We understand that you are still required to pick a subject from each of the 5 groups (and yes these include Maths), but you are likely to now have a greater amount of freedom to choose what you study than you did at GCSE level or equivalent. Therefore, try and enjoy this process, and see it as a chance to develop your skills in a direction you wish. Additionally, the subject choices you make will not limit you entirely to one career path. As we will discuss in this article, it is possible to 'keep your options open' studying the IB. In fact, by choosing the International Baccalaureate, you have done just that! You can now study 6 Foundation Courses, rather than the standard 3, and participate in CAS, ToK and an EE. This will help you develop skills that apply in all fields of work and study. If you would like to know how the IB stacks up against A-levels, please take a look at our article comparing the two!
Дата Публикации: 22-12-21
Different Types Of Industrial Printing Machines
Описание: Different Types Of Industrial Printing Machines In the industrial set up of the economy, the printing machines are growing in large numbers. Different printing techniques and processes are used by every industry for effective communication. Any machine used in printing ink on the substrate (printing medium) which can be cloth, paper or plastic, is referred to as the printing machinery. By applying pressure to the substrate, the printing machinery transfers the ink on the printing medium resting on an inked platform composed of movable type. The development of industrial printing machines changed a lot of things in the world. It would make transfer and preservation of historical records, scientific findings, and knowledge easy and possible. There is a great advancement in the printing machinery introduced in the market today given the improvement in science and technology. There is a competition in the industry, as many companies are now making printing press. As every company is introducing better features and making an effort to overcome the other competitors, this has led to the introduction of many enhanced features in printing machinery. With the introduction of various features in these types of machinery, printing is now easier to be done than it was in earlier days. Today, printing machinery is available in many sizes to suit different needs. Bigger sizes of printing machinery are available for heavy-duty printing or big-time printing businesses. You can get small and medium sizes too for small and medium printing businesses. The machinery size determines the volume of printing that will be done in a day, to a greater extent. When compared with small-sized printing machinery, the heavy industrial printing machines can print a lot of things per hour or regularly. There are different types of printing machines for printing on a different medium since different printing machines make use of different printing technology. Each of the below-mentioned printing machinery is meant to serve a particular purpose. You must consider your printing needs or the type of printing that you are doing before you want to buy or order for your printing machine. Several factors such as the size, the type of printing done, the seller, the brand, and others determine the cost. A) Digital Printers The digital printing machines have gained immense popularity for short to medium run jobs requiring high clarity, quality, and fine printing. A vibrant quality image is delivered with these types of printers. By providing cost-effective and fine printing solutions, these affordable and high-performance machines are revolutionizing the printing industry. Because of the on-demand services, digital printing equipment ensures fast turnaround time. Digital printers are ideally suited to publish a small print run of posters and books. They have many advantages over traditional methods. B) Screen Printers These are one of the versatile printing machines that are compatible to work on many surfaces including ceramics, textiles, wood, paper, metal, glass, and plastic. The Screen Printers can print on substrates of any shape, size, and thickness. They are capable of providing exciting effects that cannot be possible with other printing methods. The reason behind this is the presence of the broad range of dyes and inks which are five in types such as - solvent, water, solvent plastisol, UV curable, and water plastisol. Sharp-edged images are created by making use of stencils. The Automatic Screen Printers are an ideal choice and an economical way of printing when you need to produce nameplates, labels, signs, t-shirts, shirts, and other articles in large volumes. Moreover, to create large batches of graphics as posters or display stands, the Manual Screen Printer is used. You can also create full-color prints. The screen printing is also known as serigraphy or silk-screening. It can also be used to print images on DVDs, CDs. C) Laser Printers Laser printers are the most common type of printing machine and have remained a popular choice for consumers. There remains a misconception that laser printers use actual lasers to print the paper in some way. But, to clear the air, laser printers use static electricity to print the documents. Due to their ability to produce crisp and rapid printing, laser printers are popular. D) Pad Printers It's a type of offset printing that provides fast and high clarity printing. One of the most versatile printing technique that is used to print three-dimensional objects. In industrial printing, the Pad Printer reigns supreme for high quality and fine printing on various materials including rubber, ceramic, metal, and plastic. The quality and printing speed of Automatic Pad Printer depends on the thickness of stock/paper, type of inks used and other operating conditions. Hot foil stamping is the process of using heat and pressure to apply metallic foil or holograms to materials such as light papers, carton board, laminated board, plastics and corrugated board. Application across industries Hot Foil Stamping Machine is used across a wide range of industry sectors, but most notably in food and drink (particularly confectionary such as premium chocolate, wine and liquor bottles, and other premium foods), cosmetics, electronics, banknotes, business cards, greeting cards and art work. There is no doubt about the value of embellishments like hot foil stamping. According to a study by the Foil & Specialty Effects Association (FSEA), hot foil stamping and other similar enhancements on product packaging can help attract consumer attention faster and keep attention longer than ordinary packaging. In another study of disposable single-serve coffee packaging, the packaging with gold foil attracted the study participants attention 2.5 times faster than the control packaging. It is not just about looking good. Hot foil stamping is also used for its anti-counterfeiting properties, particularly in pharmaceuticals, and in technology such as smart phones. What Does Peripheral Equipment Mean? Mahchine Peripheral Equipment refers to non-essential devices or equipment connected to a host computer, usually externally, in order to extend its capabilities. Peripheral equipment may not be essential to the computer's operation, but it is often needed in order for a user to interact with the computer. The best examples of peripheral devices are input and output devices. Input devices are those that take external stimuli and send it to the computer for processing, such as keyboards, mice and microphones. Output devices take processed information and send it outside of the computer for human communication or inter-computer communication. This includes monitors, network adapters and printers. Internal peripheral devices, often called integrated peripherals, might include a CD-ROM drive or modem.
Дата Публикации: 22-12-21
Fasteners 101: Types of Fasteners and How to Choose Them
Описание: Fasteners 101: Types of Fasteners and How to Choose Them Fasteners play very important roles in making several objects. Suppose you do regular DIY projects. In that case, there's every possibility that you used fasteners to get your job done. They help hold parts in place while preventing excess vibration and pressure. There are many different types of fasteners. The different types also come with a reasonably high level of variability. In this article, we will discuss the different types of fasteners as well as their subtypes. We'll also give you the important tips to help you select the right fastener for your work. Before we dive into the details, let's start by defining fasteners. What Is a Fastener? The term 'fastener' is an encompassing term that describes a broad range of tools. These tools include screws, bolts, nuts, etc., and they share a common aim. The aim is to enable the mechanical adherence of objects. In simple terms, Subway Fasteners help to hold objects in place or together mechanically. You may argue that glue can perform this function effectively. If the glue is not an example of fasteners, then what is a fastener? This will prompt us to expand on the initial definition. Hardware fasteners are those that help to hold objects together mechanically. There is a broad classification of fasteners. It classifies them into Permanent and Non-Permanent fasteners. Generally, fasteners are considered to form non-permanent joints. That is, you should be able to separate two components connected with a fastener. While the pieces come apart, they must not suffer any form of damage. An exception to this rule is the rivet, which is a permanent fastener. The fact that most fasteners form non-permanent joints does not mean that the joint is weak. Using the fasteners with properly formed threads will give you a reliable hold on your objects. That way, you can be sure that your object can be subject to a high level of stress. They are highly versatile, making them useful for various types of joints. There is an extensive array of mechanical Railway Fasteners available. However, it is important that you choose the right one for your application. Choosing the right fastener is not only important for productivity purposes. It is also crucial for the safety of the process and the plant workers. Let's look at how to choose the right fastener at all times. Know the Application The types of fasteners you use will always depend on the requirements of your application. You have to consider if your Spring Bar Type I Fasteners will fit. The design of the fastener can be vital in knowing the amount of torque it can take. You may need a very long flange bolt to hold several components of your parts. Also, you need to consider leaving some threads of the fastener out. This is to ensure the safety of the material and personnel. Sometimes, you may find more than one type of fastener working. In that case, you need to seek the experience of experts to decide the right one for the work. What are sleepers? Traditionally used on railways, Sleepers have many other uses in construction and for home improvement projects. Wooden sleepers are still in use today, but they've largely been replaced by concrete sleepers as a cheaper and lower-maintenance alternative. Concrete sleepers are available in plain grey or a range of colours and styles to match different projects. Two popular options are heritage concrete sleepers, for a traditional look, or structural concrete sleepers reinforced with metal, if more support is needed. What are structural concrete sleepers? Structural concrete sleepers are sleepers made from concrete that have been reinforced with steel. These sleepers are extremely strong and can be used in all kind of projects that require structural support. These New Type II Sleepers are held together using modular posts that are set in concrete for added strength. In higher walls, or where extra strength is required, steel I-beams that are set in concrete are used (simply slot the sleepers into either side of the I-beam). Just because they're made from concrete doesn't mean you have to be stuck with boring old "concrete grey". There are pigments that can be mixed through the concrete to give you different colours. As the colour is all the way through the concrete, it won't fade, chip, or peel away. Various Cement Products are the basic ingredient of concrete. Concrete is formed when portland cement creates a paste with water that binds with sand and rock to harden. Cement is manufactured through a closely controlled chemical combination of calcium, silicon, aluminum, iron and other ingredients. Common materials used to manufacture cement include limestone, shells, and chalk or marl combined with shale, clay, slate, blast furnace slag, silica sand, and iron ore. These ingredients, when heated at high temperatures form a rock-like substance that is ground into the fine powder that we commonly think of as cement. Bricklayer Joseph Aspdin of Leeds, England first made portland cement early in the 19th century by burning powdered limestone and clay in his kitchen stove. With this crude method, he laid the foundation for an industry that annually processes literally mountains of limestone, clay, cement rock, and other materials into a powder so fine it will pass through a sieve capable of holding water. Cement plant laboratories check each step in the manufacture of portland cement by frequent chemical and physical tests. The labs also analyze and test the finished product to ensure that it complies with all industry specifications. The most common way to manufacture portland cement is through a dry method. The first step is to quarry the principal raw materials, mainly limestone, clay, and other materials. After quarrying the rock is crushed. This involves several stages. The first crushing reduces the rock to a maximum size of about 6 inches. The rock then goes to secondary crushers or hammer mills for reduction to about 3 inches or smaller.
Дата Публикации: 22-12-21
The 8 Best Natural Ingredients for Your Skin
Описание: The 8 Best Natural Ingredients for Your Skin Not Everything Natural Is Good for Your Skin — Here is How to Pick What is the Best Most of us think that "natural" is code for better. Unfortunately, just as there are good and bad Functional Food&Beverage Ingredients, there are good and bad natural ones. To help you with your selection, top skin-care experts share the natural ingredients that have been proven to be the most effective. These natural wonders can help battle breakouts, soothe irritation, treat uneven pigmentation, and even prevent sun damage, in some cases. And more specifically, here's what you should know about these good-for-your-skin Natural Fruit Powder. This healthy drink contains high levels of antioxidant chemicals — including catechins, such as epigallocatechin gallate, and flavonoids, such as kaempferol and theaflavin — to help prevent and reverse UV damage to the skin, explains Neal Schultz, MD, a dermatologist in New York City and creator of BeautyRx Skincare. These same chemicals make green tea an excellent natural anti-inflammatory and skin soothing ingredient in skin care. Dietary Supplement Ingredients can be beneficial to your health — but taking supplements can also involve health risks. The U.S. Food and Drug Administration (FDA) does not have the authority to review dietary supplement products for safety and effectiveness before they are marketed. You have heard about them, may have used them, and may have even recommended them to friends or family. While some dietary supplements, like Protein Powder, are well understood and established, others need further study. Read on for important information for you and your family about dietary supplements. Before making decisions about whether to take a supplement, talk to your healthcare provider. They can help you achieve a balance between the foods and nutrients you personally need. What are dietary supplements? Dietary supplements include such ingredients as vitamins, minerals, herbs, amino acids, and enzymes. Dietary Fiber Powder is marketed in forms such as tablets, capsules, softgels, gelcaps, powders, and liquids. What are the benefits of dietary supplements? Some supplements can help assure that you get enough of the vital substances the body needs to function; others may help reduce the risk of disease. But supplements should not replace complete meals which are necessary for a healthful diet – so, be sure you eat a variety of foods as well. Unlike drugs, supplements are not permitted to be marketed for the purpose of treating, diagnosing, preventing, or curing diseases. That means supplements should not make disease claims, such as "lowers high cholesterol" or "treats heart disease." Claims like these cannot be legitimately made for dietary supplements. The use of new Natural Pharmaceutical & Nutritonal Supplement Ingredients from traditional and indigenous plants and herbs will continue to be a 'key driver' in the natural beauty market, with consumers' appetites for new innovation in the sector showing no signs of dimming. Consumers want to use natural, renewable and sustainable cosmetics that are good for them and the world. However, most of the ingredients and packaging materials used today are made from fossil fuels, plastics or palm oil, which are related to many environmental and ethical issues. We produce high-value Personalcare & Cosmetic Raw Material from a branch of the forest industry, enabling our customers to make breakthrough innovations in the beauty industry. The biologically active compounds that we can process from raw materials provide many physiological, functional and active properties for skin care, body care, oral care and hair care formulations. For example, Innomost has developed birch bark-derived ingredients that can replace wax and petroleum and other ingredients that bring active ingredients or functional properties such as azelaic acid, cork and birch brain (such as birchbark powder for scrubbing). Our ingredients have many possibilities.
Дата Публикации: 22-12-21
2 Times It's Better to Use Body Wash Over Bar Soap—and 3 Times It Isn't
Описание: 2 Times It's Better to Use Body Wash Over Bar Soap—and 3 Times It Isn't You think taking a Shower & Bath would be a rather straightforward task. After all, all you need to do is hop under the toasty water, grab a little cleanser, and scrub the day away. But hold on a second—the cleanser you are using might not be the ideal one for your skin. Sorry to burst everyone's soap bubbles, but there is, in fact, a difference between soaps, body washes, and shower gels, and that difference matters, depending on your skin type and even where you live. To figure out the best product to wash your body with, we asked Ilyse Lefkowicz, MD, a board-certified dermatologist specializing in general and cosmetic dermatology, and the global dermatologist for Head and Shoulders, for all the answers. What is the difference between bar soap and body wash? "The main difference between a bar cleanser and body wash is the form they come in and how they interact with skin," says Dr. Lefkowicz (she prefers to use the word "bar" instead of "Soaps," since people often associate the latter with something too harsh). "Both bar cleansers and body wash will cleanse. However, certain bars may be harsher than body wash and can remove essential lipids and proteins, or alter the skin's pH level, which can cause skin irritation." For people with normal to dry skin, or people looking for milder product formulas, Dr. Lefkowicz says body wash is best. For people with oily skin types, living somewhere hot and humid, or people just looking for a very deep wash—like after a workout—she recommends using a bar as a quick and easy way to get clean. Dr. Lefkowicz also finds body washes to be slightly more hygienic than Bath Bars. That's because bacteria can live on bars and remain on there from shower to shower and person to person. "To avoid bacteria buildup, always rinse it between use and allow to drain and dry completely," Dr. Lefkowicz adds. "With a body wash, it is easier to avoid bacteria buildup since it doesn't touch skin while in the bottle." What is the difference between shower gel and body wash? They are similar, but not identical. Both are liquid cleansers, typically made with emollients to soften the skin and mild surfactants that create a rich, foamy lather. The main difference is in their consistencies and concentration of ingredients. "Shower gel has a firmer, gel-like consistency, and typically has a higher concentration of fragrance," Dr. Lefkowicz says. "Body washes tend to be more hydrating and moisturizing, which makes it more useful in harsher, colder weather to help avoid stripping moisture away from the skin, which can open it up to damage." According to Dr. Lefkowicz, Shower Gel & Bath Jellys are an excellent choice for people living in particularly hot, humid climates or with naturally oily skin. "Because shower gel is less moisturizing than body wash, it's better for those living in warmer climates or for people with oily skin," she says. There are a number of over-the-counter (OTC) products available to help keep your skin smooth. Be sure to use Skin Care products that are right for your skin type for the best results. Skin exfoliators. Scrubs can help slough away dead skin cells that can build up on your skin, causing it to feel rough and look uneven. To exfoliate safely, apply the scrub in a slow circular motion using very light pressure, and only exfoliate once a week. Alpha hydroxy acid (AHA). AHAs are plant and animal acids used in skincare products. They exfoliate, promote collagen and blood flow, and improve the appearance of wrinkles for Face Care. They are also used to treat acne and skin discoloration. Moisturizers. Moisturizer Body Care adds an extra layer of protection to your skin and helps it stay hydrated. Choosing a facial moisturizer and applying it daily can help to keep skin smooth. Do not forget to apply a moisturizing body lotion to help keep the rest of your skin smooth. Dry brushing. Dry brushing involves using a natural, stiff-bristled brush to exfoliate the skin. Use the brush on dry skin, and brush in long fluid strokes on your limbs, and in a circular motion on your back and torso. Mild, gentle cleansers. The American Academy of Dermatology (AAD) recommends washing your face with a gentle, non-abrasive, alcohol-free cleanser in the morning and before bed, as well as after sweating. This is the season to Gift Set and glow. Lucky for you and your loved ones, we've curated an extra-special list of skin-care gift sets for the 2021 holiday season that cover both bases excellently. No matter who is on your list — or what their skin concerns may be — brightening, firming, hydrating, and blemish-busting kits are all accounted for.
Дата Публикации: 22-12-21
What is EPS Shape Moulding Machine and How does it work
Описание: What is EPS Shape Moulding Machine and How does it work EPS Machine system adopts multiple heating method, adopts solid and shifting balance valve system, control instrument and control valve parts to complete the cycle, thus making the machine more steam saving. The unstable factors of product quality caused by unstable steam source are solved and the quality is greatly improved. Steam and cooling water valves are imported components, safe operation, stable performance, foam molding machine can operate 2-3 machines. The working principle of foam molding machine is similar to the principle of syringe, it is by virtue of the thrust of screw, the plastic has been plasticized into the molten state of injection into the mold cavity, after curing and shaping the product process.Injection molding is a cyclic process, one cycle mainly includes: quantitative feeding – melt plasticizing – pressure injection – mold cooling – mold opening and taking. After the product is taken out, the mold is closed again for the next cycle. EPS Shape Molding Machine can change different Mould to produce different foam products, EPS Mould can be customized, the most common foam vegetable boxes, foam fish boxes, seedling trays, ICF Blocks and So on. We have recently begun to manufacture a series of machinery and equipment for EPS Mould facilities that require high multi-fold expansion capabilities. EPS Raw Material Project is the first pre-expanding machine to produce EPS beads with a density of 16-20g/l and a capacity of 1,500-2,000kg/h. The main purpose of this multi-expansion design is to have a secondary expansion capacity of 120/150m3/h. The heating coil type fluidized bed dryer is made of stainless steel. In addition, the steam surface of the all stainless steel steam container is a wedge-shaped line. The machine is fully automatic. PLC with touch screen and Mitsubishi trademark as an automatic control partner is optional. It is equipped with a vibration sensor and an automatic density control unit. We manufacture various types of block and shape forming EPS processing machinery and equipment, such as vertical block forming machines, automatic cutting lines, and forming machines. Expandable polystyrene (EPS) and other industrial Styrofoam are 98% air which makes them very bulky in comparison to their weight. Because of the high volume, products made with these materials fill dumpsters quickly, leading to much higher waste disposal costs. Foam Compactors reduce the volume of EPS, and in turn, fewer fees are incurred in the process. Also, a benefit, compacted foam products and industrial Styrofoam can be shipped economically to a recycling center. Compacting foam plastics can save thousands in unnecessary waste disposal costs! EPS Recycling Machine can benefit a wide variety of markets. Here are some examples of businesses that can benefit from it. Manufacturers Furniture Stores Appliance Stores Food/Seafood Companies Property Management Agencies Retailers Schools/School Districts Stadiums and Parks Expandable Plastic Recycling Programs TODAY, THE DEMAND FOR EPS RECYCLING IS GROWING EVEN STRONGER Waste reduction is a priority for many companies and communities as the impact of consumer waste has become much more evident. Recycling initiatives have been rolled out across many industries. Now, you can find recycling programs for paper, aluminum, plastic bottles, EPS and industrial Styrofoam waste. RECYCLED EPS MATERIALS ARE RICH IN VALUE Companies value recycled materials because they can be used to make a wide range of products. Recycled EPS is used to make items like picture frames, plastic lumber and packaging. Companies are now paying substantial amounts of money for recycled polystyrene as it is valued more than some metals, glass, paper and other recyclables.
Дата Публикации: 22-12-21
Stone crushing equipment: a vital contributor to sustainable construction
Описание: Stone crushing equipment: a vital contributor to sustainable construction Stone Crushers are extensively used to crush bulk and heavy stones into different sizes efficiently and reliably, be it at quarries or recycling plants. There has been a considerable rise in mining activities across the world to meet the burgeoning requirement of valuable minerals or other geological materials. Global stone crushing equipment market size is anticipated to hit US$8.5 billion by 2025, with the consistent deployment of jaw and impact crushers. A rise in urbanization, along with the increase in transportation activities across the globe is coercing governments to develop roads and highways. Increasing establishment of factories, SEZs, residential properties and corporate offices in developing nations is furthermore pushing infrastructure spending. Like much other large equipment used in industrial and construction settings, stone crushing plants are also bound by environmental policies. When mining natural river sand or making artificial sand, also called machine-made sand, manufactured sand, M-sand, mud and other impurities are mixed into it, which can easily cause unwashed sand and gravel to condense together when stored, thereby reducing the performance of sand and gravel. While the well-washed sand has a good use effect and high market price. The Sand Making Machine &Sand Washing Machine is satisfied with the demand and became the darling of the market. A sand washing plant with a scientific and reasonable configuration will effectively improve productivity, make customers recover costs in a shorter time, and reap more considerable economic interest. If the raw material is natural sand such as river sand, mountain sand, or the unwashed sand you bought, there should be siloes, vibrating screens, sand washers, dewatering machines, and belt conveyors in the sand washing plant. One machine that is heavily used for crushing and grinding tasks is the ball mill. This machine is described as a grinding device, capable to crush and transform large hard materials into fine powder. A Grinding Ball Mill is a cylindrical machine, generally used for mashing and crushing paints, ceramic materials, ores, and other hard materials. By rotating on the horizontal axis, the ball mill effectively turns hard materials into fine powder. There are different ball mills on the market, but all of them use the same working principle and are consist of the same elements. For example, grinding materials can be found in every ball mill. Due to the different particle size composition of gold in placer gold mines, the effective particle size limits of materials processed by various gravity separation equipment are also different. Usually, the placer gold Ore Beneficiation Equipment mostly uses centrifugal concentrators as the roughing equipment. When the processing capacity is large, a jig can be used to concentrate before the centrifuge so as to reduce the quantity of centrifuge. The shaking table is always used as cleaning equipment for the centrifuge concentrates. The sluice box which is a traditional way can be used for the tailings of the centrifuge, or directly for the output of screening. Therefore, the reasonable beneficiation process of placer gold ore is mostly the combined operation of several gravity separation equipment. Coal drying technology is divided into drum drying and drum distillation units ---- two kinds of technology. Drum drying means adopting Rotary Drying Equipment for drying to reduce the water moisture, its products are high heat value quality coal; Drum drying distillation technology refers to using rotary drum dryer and rotary distillation machine together, the dryer dehydration and heat of coal, dry distillation machine dry distillation of lignite removal volatile part and the internal moisture, the product is high heat value, low sulfur, low water moisture, low volatile of dry distillation upgrade coal. The burning of fuel, as well as the residence time of solids depends on the gas flow rate. The calculated gas time varies according to the type of project, from 1.4 to 1.7 seconds in a calciner system with tertiary air flow up to 4 to 5 seconds in total or hybrid flow systems. Some calciner projects induce a cyclonic or rotational movement in the gas flow inside the Calcination Equipment, giving the solids a significantly longer residence time. That is extremely favorable so that a high degree of calcination is obtained, since most of the larger particles will be calcined. If higher calcination rates are reached during the operation, guaranteed kiln production can be exceeded. The level of calcination will depend mainly: 1. temperature inside the calciner 2. residence time of the raw meal in the system 3. solid gas separation 4. dust circulation effect 5. kinetic behavior of raw materials Using an AAC(Autoclaved Aerated Concrete) Block Making Machine in construction has been increasing over the years. But this is not a coincidence as concrete blocks offer multiple advantages economically, in terms of constructive performance, as well as in build quality and versatility. From the AAC Block Making Machines which are lightweight and more heat resistant to the semi-automated machines, these machines continue to evolve and the type of concrete blocks continue to improve. With the accepted notion and popularity there is now high appeal for more technologically sounded block machine models such as Automatic block making machines. What is coal briquette? Coal briquette is made by the Coal Briquetting Equipment which uses coal dust or coals fine as the raw material. Sometimes we add other materials like the binder or something to make the briquette as most of the coal fine is hard to form together only by briquette machine. Why coal briquette When we mine the coal, transport it, dry it, there comes a lot of coal dust. As matter of fact, about 20% of the coal we can get is in small particles. So, coal briquette is a good way to deal with these fine or dust as briquette has more burning value and utilization rate.
Дата Публикации: 22-12-21
LED Grow Lights for Plant Production
Описание: LED Grow Lights for Plant Production Introduction Light is the single most important variable with respect to plant growth and development and is often the most limiting factor. Therefore, the use of grow lights in commercial greenhouses is beneficial for plants and growers. The reason for using Indoor Grow Lights varies and includes increasing light levels for plant photosynthesis or altering photoperiod. The duration of light a plant perceives is photoperiod. The different lighting sources that growers can use include incandescent (INC) lamps, tungsten-halogen lamps, fluorescent lamps and high intensity discharge (HID) lamps. Light emitting diodes (LED) are fourth generation lighting sources and are an emerging technology in horticulture. LED Advantages Energy efficient Easy installation More durable Longer lifetime (less lamp changes) Low heat emission Before choosing Cannabis Grow Lights, several factors such as costs, efficiency, total energy emissions, life expectancy, light quality, light quantity, light duration and effect on plant growth and flowering should be considered. This Fact Sheet provides information about LED Grow Lights for use in plant production. Design and Function The design of LEDs varies and there are three main structural types, which are lead-wire, surface mounted and high-power LED. Despite the different designs, each type is mounted on a printed circuit board; therefore, LEDs function like computer chips. Foldable Grow Lights are solid-state semiconductors and when turned on or off, the action is instant. As for life expectancy (dim to about 70 percent from initial installation), LEDs can operate up to 50,000 hours. It is not necessary to replace single diodes or lamps constantly because LEDs do not burn out. Factors such as design, materials used and heat release affect life expectancy. Another important feature of LEDs is that heat does not escape from the surface, but through a heat sink which allows for close proximity between plants and LEDs. As for consumption of energy, LEDs are more efficient and use less energy than any other traditional greenhouse lights. In addition, operating costs and carbon emissions are lowered when using LEDs. Infrared Heat Lamps vs. LED Light Therapy Devices Are red light therapy devices different from infrared (IR) heat lamps? Yes, a lot different, and one of the big reasons is right in the name: heat. Infrared Lamps are designed to induce heat stress on a user. The heat is the point. The problem is that excess heat can potentially cause damage to your skin. By contrast, high-quality LED light therapy devices—like Joovv—give off very little heat, and have been found safe, effective, and free of side effects in numerous clinical trials. Even if heat lamps could deliver clinical results similar to light therapy, the burn risks are not worth it. Beyond the heat dangers, heat lamps simply do not offer the clinically-proven wavelengths or medical-grade power output of a high-quality LED device, which we will explain in more detail throughout this article. Heat Lamps Do not Offer Clinically-Proven Wavelengths of Light Not all natural light is created equal; different wavelengths and colors within the light spectrum have different effects. And it is hardly a secret which wavelengths are effective for light therapy. Extensive research has shown that only a relatively narrow band of red and near infrared wavelengths impact your cells and have a significant therapeutic effect. Poultry Heat Lamps produce a wide range of wavelengths, but as the graph below shows, the wavelength curve builds to its peak output around 1100 nm. Less than 1% of the energy from heat lamps is delivered from 600-660 nm, and only about 2% is delivered in the entire 810-880 nm range. In total, these wavelengths only represent about 3% of the total energy delivered by a heat lamp bulb. In other words, 97% of wavelengths from a heat lamp fall outside of the wavelength range known to produce the greatest health benefits. Infrared Heat Lamps Lack Power and Effectiveness In addition to heat lamps delivering inferior wavelengths, they do not offer medical-grade power like a high quality LED light therapy device. The total power output—sometimes referred to as irradiance—from a device also directly impacts the time required for treatments. Lower-powered products like Swine Heat Lamps take way longer to produce benefits, if ever. Imagine filling up your water bottle from a dripping faucet—it will fill up eventually, but you will waste a lot of time in the process. UV Lamp is a type of electromagnetic radiation that makes black-light posters glow, and is responsible for summer tans — and sunburns. However, too much exposure to UV radiation is damaging to living tissue. Electromagnetic radiation comes from the sun and transmitted in waves or particles at different wavelengths and frequencies. This broad range of wavelengths is known as the electromagnetic (EM) spectrum. The spectrum is generally divided into seven regions in order of decreasing wavelength and increasing energy and frequency. The common designations are radio waves, microwaves, infrared (IR), visible light, ultraviolet (UV), X-rays and gamma-rays. Ultraviolet (UV) light falls in the range of the EM spectrum between visible light and X-rays. It has frequencies of about 8 × 1014 to 3 × 1016 cycles per second, or hertz (Hz), and wavelengths of about 380 nanometers (1.5 × 10?5 inches) to about 10 nm (4 × 10?7 inches).
Дата Публикации: 22-12-21
Metal Powder For Real Metal Cold Castings
Описание: Metal Powder For Real Metal Cold Castings "Cold-Casting" is a term used to describe the process of mixing metal powder with a resin and applying the mixture into a mold. The finished casting gives the appearance and weight of solid metal. The metal cold-cast process is faster and much less expensive when compared with foundry casting of molten metal. Easy To Use Metal powder is mixed into Colormatch? resin until the mixture is thick and creamy. The mixture is then "slush-cast" or brushed onto the mold surface until the resin cures. The gel coat is then back-filled with straight resin, resin mixed with metal powder, resin mixed with steel weights or rigid foam. Aluminum The mesh size of this Aluminium Powder is -200 vs. the -300 mesh for the other metal powders and gives a better cold cast effect compared with other mesh size powders that we tested. Polished castings are brighter vs. castings made using nickel/silver powder, which has more of an antique metal look. Spherical Aluminium Powder is perfect for producing castings with antique brass finishes. Polish the surface to bring out the shine of the metal powder. Afterward, apply a shoe polish to add depth and character to your pieces. Polish your castings to produce a realistic cast bronze piece. Allow the metal in your castings to achieve a natural patina or accelerate the process with patina solutions. With Atomized Aluminium Powder, you can give your castings a bright, modern copper appearance great for low relief wall art. Burnish with black shoe polish and apply chemical patina for a stunning rustic look. Castings made using nickel/silver powder can be polished to produce more of an antique metal look compared to the aluminum metal powder. When mixed with SmoothCast? ONYX plastic castings will have better heat resistance for applications where temperatures may exceed 200°F. The two solid fuel boosters that burned for two minutes helping the U.S.'s old space shuttle fleet to reach its orbit each contained 80 tons of Non-spherical Aluminium Powder, which corresponds to 16 percent of the total weight of the solid fuel. "This idea of burning metals as a fuel sounds pretty far out there, but this is something that has been done in rockets forever," says Jeffrey Bergthorson, an aeronautics engineer at McGill University in Montreal, Canada. He and colleagues at McGill and at the European Space Agency published this week in Applied Energy a study outlining how metal powder could serve as a zero-carbon fuel to power transportation and the grid. "Aluminum powder has long been known to be a very energetic material," says Bergthorson. But other metals such as magnesium—remember the magnesium flash light—zinc, and even lithium and silicon could do as well. "If we look at the elements available in the Earth's crust, iron is the third most abundant element, and the idea of the iron economy is that once you got this thing going, you will be recycling that iron. Initially you will need a production from ore, but at some point you would not be mining iron anymore, you would simply be recycling it back and forth, adding the iron in at the point of use," says Bergthorson. Bergthorson and his colleagues' idea is not to use Aluminium Metal Powders as a primary energy source, but as a way to store, transport and trade it as a zero-carbon fuel. If this sounds similar to the idea of a hydrogen economy, it is. In the hydrogen economy the gas is manufactured by solar or other renewable forms of energy and then distributed as a fuel that can drive cars and other transport systems. Bergthorson proposes that instead iron powder would be distributed as a means to drive power plants, ships, locomotives and even cars.
Дата Публикации: 22-12-21