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- Создано: 16-12-21
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THE CORRECT MAINTENANCE OF CHAINS, GEAR WHEELS AND SPROCKETS
Описание: THE CORRECT MAINTENANCE OF CHAINS, GEAR WHEELS AND SPROCKETS The kart’s Transmission Parts consist of a chain, gear wheel and sprocket. Elements that we all know but which, unlike other vehicles, for example, bicycles or motorcycles, are subjected to greater stress due to the forces involved and the absence of flexible couplings. The common mistake is neglecting maintenance and not knowing how to recognize the alarm bells that necessitate the replacement of a worn component. It must be said that a transmission failure, for example, chain breaking, can also affect the engine. In the case of engines without a rev limiter, an overspeed could occur with consequent damage to the connecting rod which would therefore be replaced with certainly higher costs than those that can be incurred to keep the chain-gear wheel-sprocket fully efficient, thus reducing this type of fault and damage. The majority of bikes on the market today have external drivetrains, which have been refined into simple, lightweight and efficient systems. Gears are changed on the cassette (a set of Sprockets on the rear wheel) by the rear derailleur. This shifts the chain up or down the cassette. As the derailleur moves to change gear it forces the chain against ramps or steps, moving it onto a bigger or smaller sprocket. The bike may also have a front derailleur, which shifts the chain between chainrings attached to the cranks. The Gears at the front provide large jumps, which effectively change the range of your gears so that they are more suited to high speed, flat terrain or low-speed climbing. The cassette allows you to select your gear more precisely within that range as you modulate your effort. You will usually find between one and three chainrings (single, double or triple chainset) and up to 11 sprockets (12 exist too in the form of SRAM Eagle and Campagnolo Record, and even 13 with Rotor) on the back wheel. That gives you a huge range of gears to choose from. What is hub gear on a bike? Hub gears are a popular option for commuters and those who want a robust and relatively maintenance-free drivetrain. With service intervals ranging between 3,000 to 5,000km, internal hub gears are great for the less maintenance-inclined. There’s also no doubt that derailleurs are relatively exposed and susceptible to damage. Having everything nicely packaged away inside your rear wheel lets you breathe that little bit easier, especially during winter, when keeping gears protected from the elements doesn’t hurt. There are lots of hub gear options available, but the most common are from Shimano, SRAM, Sturmey Archer and well-known manufacturer Rohloff. With systems ranging from three to 14 gears, there’s a wide range of options for whatever terrain you find yourself on. Both gearboxes and hub gears can also be used with Car Belt drives. This requires even less maintenance than a chain because there are no links to lube, meaning they are also much cleaner than an oily chain. Chain or belt drive: which is faster? However, only certain frames are compatible with a belt drive. Because the belt is a continuous loop, the frame requires removable dropouts or a chainstay splitter that lets you thread the belt into the rear triangle. Gear and Pulley drive systems are common methods of transmitting motion from a source to an end load. Almost everyone can recognize belt and pulley drive systems, even without an engineering background. They are commonly used in everyday devices, but they are also present in industrial machines. Understanding the differences between the two systems can help design the correct repair and maintenance methods to ensure that they remain in service as long as possible. The principle behind today’s modern Hydraulic Parts systems started in the mid-17th century when French mathematician and physicist Blaise Pascal concluded: A change in pressure at any point in an enclosed fluid at rest is transmitted undiminished to all points in the fluid. From chemical processing to oil and gas processing to food and beverage processing, the correct selection of hydraulic components is critical to the change in pressure, safety and service life of the system. Regardless of the industry, and depending on the specific operating requirements, a single system can have both flexible hose and metal tubing. One part of the system may have moving parts operated by hydraulic fluid, which require flexible hose, while another part of the system carrying food product (i.e. beverages) requires a stainless steel tube and fittings that are stationary. Stainless steel hydraulic Metal Fittings are best for food and beverage processing applications, while hydraulic fracking (which carries hydrochloric acid, oil and water) requires special high-pressure Hydraulic Hose assemblies. Hydraulic fracking hose assemblies may have fittings and flanges made of carbon steel, stainless, Hastelloy, Monel, Duplex or other alloys. Process versus discrete manufacturing Though seemingly basic, it is important to know the distinction between process manufacturing and discrete manufacturing. In process manufacturing, goods are produced by combining ingredients, raw substances and supplies, using formulas or recipes — such as in the food and beverage, chemical, petroleum and pharmaceutical industries. On the other hand, discrete manufacturing produces finished goods that are distinct, and specific items considered individual units. Discrete manufacturing is the process for making items as simple as nuts and bolts, to complex items such as automobiles and computers.
Дата Публикации: 16-12-21
Are Gaming Chairs Worth It?
Описание: Are Gaming Chairs Worth It? What Makes The Perfect Gaming Chair? Comfort Obviously, one of the important factors to consider when choosing a Gaming Chair is how comfortable it is. The chances are you’re going to be parking your behind in it for a good chunk of time, so you need to make sure it’s providing enough comfort to keep you well focussed on gaming rather than the creeping numbness in your backside. Gaming chairs have been built with comfort in mind – manufacturers are well aware that we gamers have no time limit when it comes to smiting the Alliance in WoW, or blundering through battle royales in Fortnite – which also ties into ergonomics Does the chair have enough lumbar support? Is it designed for someone of your height and build? Are the armrests adjustable? There are a lot of ergonomic factors that can harm your alignment when you’re sat down. Handrail Gaming Chairs are meant to combat these and keep you comfortable for as long as possible, so make sure that’s what they’re doing. Material When it comes to Game Chair With Footrest, you’re going to be looking at the three most popular material options: leather, fabric, and mesh. They each have their own benefits and drawbacks, so this will all come down to personal preference. Leather – Leather is best for aesthetics, as well as being easy to clean thanks to its easy to wipe texture. But, it’s often less durable as it’s usually PU instead of genuine leather. Fabric – Fabric is usually more comfortable and more durable than leather or mesh gaming chairs. Although, you may find it’s a lot more difficult to keep a fabric gaming chair looking clean and fresh, as stains will set more easily, and you can’t usually wipe it down. Mesh – Mesh definitely isn’t winning any beauty contests. However, thanks to its high level of breathability it does do a better job of keeping you cool and sweat-free as you game – and the lightweight material can often be a positive for some. Space can be a serious concern for many passionate gamers. As a gamer, you have to organize and maintain a lot of things like – cables, gaming headset, keyboard, gaming mouse, PC or laptop, speakers, etc. Sadly, not everyone is blessed with ample space to keep the gaming zone organised and picture perfect. Gaming Desks play an un-replaceable role in helping you to create that extra space which would enhance your gaming experience. Either you have a cosy office room or you are sharing a little space for yourself along with your friends in a dorm, you would witness the magic a gaming desk does when you use it. The best advantage with gaming desks is that they come in various standard sizes, in a budget that suits every pocket. Gone are the days when you could not find desks specially mentioned for gaming. The present market offers plenty of options for gaming desks –in colours, sizes, models and features. Ergonomics When you sit in front of computer for long hours, you know better what you are prone to. Wrist pain, thumb pains, headache, neck pain and such joint pains. If you have been under the notion that gaming desks are only for gamin, rethink again. The entire setup of the Z Shaped Gaming Desk is such that you can use it for multiple purposes – work, personal use and gaming. Most gaming desks are designed ergonomically so that they do not distract you and you will have no pain or discomfort during and after your gaming session. You can peacefully focus on your gaming or other work that you do on your laptop or PC when you set up a gaming desk in your room. Ever heard of carpal tunnel syndrome? This is something related to numbness of the thumb and fingers owing to prolonged usage of keyboard and mouse. In fact many gamers have been out of the gaming arena just because of the inconvenience caused by this syndrome. So why risk? When you have prevention, it is always wiser to opt for it instead of going to a cure at the last. Bring on a gaming desk and keep rocking your gaming sessions without any inconvenience or troubling your body. It’s no exaggeration to claim that the Office Chair is one of the most important design objects in our daily lives: the average white collar worker spends five and a half hours a day sitting at work. Given the modern materials, clean lines and mechanical complexity of high-end office chairs today, it may be surprising to learn that the office chair as we know it today was born more than a century ago. By tracking how the office chair evolved with the changing nature of work, we can better understand how we ended up sitting on kinetic sculptures of mesh and metal today, and where the office chair might go next. The Industrial Revolution Gave Birth To Office Chairs Before the nineteenth century, most of the global workforce was employed in agrarian labor—an “office chair” was only relevant for the wealthy, government officials and academics. In fact, Charles Darwin is the earliest known adopter of a proto-PU Leather Office Chair, grafting wheels onto a normal chair in the 1840s so he could swivel between specimens. It goes without saying that this was a fairly uncommon use case. Then came the railroad, the advent of manufacturing, and the Industrial Revolution. As the traditional model of labor was upended, more administrative workers were needed for logistical coordination and bookkeeping, and the concept of general and administrative workers was born. Businesses empowered by rail access in scaling and expanding to new markets employed more and more people—creating a cadre of middle managers. This was the first time in history that productivity accrued on a mass scale from people sitting indoors. As white collar workers became a crucial economic resource for the first time, their bosses began to recognize the value of making them comfortable. Mid-1800s: Victorian Design Enter the first mass production office chair: the Centripetal Office Chair, designed by the inventor Thomas Warren and launched by the American Chair Company in 1851 at the Great Exhibition in London. The example depicted to the right now sits in the Brooklyn Museum. It looks dated, but the Mesh Office Chair was surprisingly functional by today’s standards. Made of cast iron and upholstered in velvet, the chair’s standard features included full tilt movement enabled by four large springs concealed in the frame, a revolving seat, and casters for movement. The chair sold poorly outside the United States, because the Victorian norms prevailing in the Anglophone world at the time viewed comfortable seating as immoral. The Centripetal Chair was too ergonomic for its time. The quality of wood materials for Office Desks varies greatly. Hardwoods such as mahogany, walnut, cherry, or oak have been staples in offices since time began, and they are particularly handsome in their many designs. However, with the high quality of solid wood desks come high costs. To minimize this, desks manufactured with hardwood veneers over particleboard have surfaced. As one would expect, with the lower price of such options comes lower quality. These desks do not weather heavy usage for as long as the solid wood options, and as such, need replacement, maybe before your budget is ready. Wood, however, offers a timeless beauty to any office, and with the versatility of design elements in the woodworking itself, as well as varieties of stains and paints, there’s virtually nothing a Wood Office Desk cannot be, design-wise. There is a balance to be had with using glass for the office desks. They’re durable insofar as they’re not likely to wear the same way as wood, but they’re a mix of sturdy and fragile. They offer quite an array of configurations, making them optimal for creative or multi-use projects. But put them in a harsher environment—such as manufacturing or high traffic usage—and the risk of breakage is necessary to consider. Tempered glass can minimize safety risks somewhat, but they’re more suited to professional environments. Their framing can be part of the aesthetic, as well, with metal or wood supports and frames, which can really set off the beauty of the glass. Available in smoky colors, tinted, or even frosted, they’re an elegant consideration for any professional office.
Дата Публикации: 16-12-21
Benefits of installing solar panels on your home
Описание: Benefits of installing solar panels on your home Solar Panels are a great way to offset energy costs, reduce the environmental impact of your home and provide a host of other benefits, such as supporting local businesses and contributing to energy independence. 1. Reduce or eliminate energy bills. This one is pretty amazing. We live in Washington, D.C., which has an average amount of sun, but it’s enough to power our house of three kids and two adults at net zero energy consumption. On warm spring days, we generate a lot more than we consume, and then we trade that with the utility. On hot summer days, when we run the air conditioning, or on cloudy days, we draw from the grid. Even if you live somewhere cloudy, such locations typically receive more than two hours of sunlight per day, while sunny locations receive an average of 5.5 hours of sunlight per day. Although sunny days will produce more solar energy, Monocrystalline Panels will continue to draw energy even when the weather is cloudy. Indirect, or diffused, sunlight will still help to power your home. Cloudy days usually produce around 10 to 20 percent of the power generated on sunny days. 2. Earn tax credits and rebates. I didn’t realize how big of a benefit this one would be, but our solar panels are actually paying us. To start, you will get 30 percent of total system costs back from equipment and installation as a federal income tax credit when you file your taxes. This means you would save $7,500 on a solar system worth $25,000. The investment has a payback period of only 3.5 years, while the Polycrystalline Panels have a warranty of 10 years and useful life of 25 years—which means you generate free electricity and extra credits for 20+ years. It's hard to beat. It's both socially responsible and economically profitable. Many installers also offer a no-cost installation, where they front all of the money for the panels and installation and charge for electricity at a reduced rate. They are basically “leasing” your roof space and giving you a discount on the electricity in return. This is a good option for homeowners who do not want to make the initial investment or would prefer a no-money-down option. The installer collects all the proceeds from the SRECs in this case. No matter where you live, you most likely have some amazing tax credits for solar. Take advantage of them while you still can. A solar power inverter is critical to a solar panel system. Without it, the system can’t generate electricit Solar panels are usually made from silicon, which provides a semi-conductor surface. The panels sit within a metal frame encased in glass. When particles of light – photons – hit the silicon of each individual solar panel, electrons become agitated. This creates a photovoltaic (PV) charge, which in turn produces an electrical direct current (DC). The panel’s wiring captures this current, and it's the Solar Inverter that converts the DC to an alternating current (AC). Solar inverters connect the solar panel system to the existing electrical meter, or it feeds the power to the electrical grid. How does a solar inverter work? Direct current flows in one direction. Appliances at home run on AC, so conversion has to happen. The solar panel inverter accomplishes this over four steps. When comparing quotes for different Energy Storage Systems, it can be difficult to determine which characteristics and technical specifications matter most and with good reason: the home energy storage industry is so new that you probably don’t know anybody with a battery who you can ask about their experience. While every battery has to meet certain reliability and safety requirements in order to be sold and installed in the US, outside of those standards there is very little standardization of specs and characteristics across the batteries available on the market today. We’ve provided some tips on what to look for when comparing different battery quotes. What to look for in a home solar battery: six measurements to consider A Solar Storage Battery stores electricity for later use, so you can keep appliances running during a power outage, use more of the solar energy you produce at your home, and even save money on electricity in some cases. They are often referred to as "deep cycle batteries", due to their ability to charge and discharge a significant amount of electricity compared to something like a car battery. How to decide which battery specs matter for your needs There are a number of different potential decision criteria and comparison points to make when evaluating your energy storage options. Here are a few of the most common decision criteria, as well as which battery specs matter most if these criteria match your situation: If you want to power more of your home at once, look for a Residential Wall Battery with a high power rating If you want to be able to power a more energy-intensive appliance (like a sump pump), look for a battery with a high instantaneous power rating If you want to run your home with your solar battery for a longer amount of time, look for a battery with a higher usable capacity If you want to get the most out of every kilowatt-hour of electricity you put into your battery, look for batteries with a higher roundtrip efficiency If you are space constrained and want to get the most amount of storage out of the least amount of space, look for lithium-ion nickel manganese cobalt (NMC) solar batteries If you want a battery with the longest lifetime that you can cycle the most amount of times, look for lithium iron phosphate (LFP) batteries If you want a battery with the absolute highest safety rating possible (don’t worry, they’re all safe!), look to LFP solar batteries Solar power is harnessed using Solar Photovoltaic (PV) technology that converts sunlight (Solar radiation) into electricity by using semiconductors. When the sun hits the semiconductor within the PV cell, electrons are freed and bus bars collect the running electrons which result in electric current. When we place Solar panels connected in a calculated manner in the sunlight, they start producing current and voltage in the form of Direct current (DC) but in most of the countries in the world appliances and equipment runs on Alternative current (AC) so we need to connect to all Solar panels to an inverter which then converts DC into AC for home use. 1:On-grid Solar Power System / Grid interactive System > This type of Solar Energy System is used when you want to reduce your electricity bill > In this type of system you will save the per unit amount multiplied by units generated by Solar system (known as net metering, involves govt. approvals) > When your house’s electricity consumption is low and solar generation is high your Solar system will feed the excess energy into the grid/electricity company. > When your electricity consumption is high and solar generation is low your Solar system will take the excess energy from the grid/electricity company and feed into your home. 2: Off-grid Solar Power System / Standalone System > Off-grid Solar System is used when electricity/grid is not present or someone required backup to safeguard against power cuts. Also, in some cases, if someone wants to generate his own green energy! (No govt. involvement is required in this case) > This is a battery based system, so energy generated from the solar panel is stored in the batteries which are connected with this system > You can operate some of essential equipment/appliances directly on this system at the time of grid unavailability of no sunlight hours as well. 3: Hybrid Solar Power System > Hybrid Solar System is the combination of off-grid and on-grid solar system. > If the electricity consumption of your house is lower than the energy generated from the Solar system, excess energy will get stored in batteries connected with this system. > If the house electricity consumption is greater than Solar energy generation excess requirement will be catered through batteries. >If the house electricity consumption is lower than the energy generated through Solar panels and batteries are fully charged than the excess energy generated goes into the grid/electricity dept.
Дата Публикации: 16-12-21
Plastic Injection Moulding - An Introduction
Описание: Plastic Injection Moulding - An Introduction Introduction One of the most common methods of converting plastics from the raw material form to an article of use is the process of Plastic Injection Mold. This process is most typically used for thermoplastic materials which may be successively melted, reshaped and cooled. Injection moulded components are a feature of almost every functional manufactured article in the modern world, from automotive products through to food packaging. This versatile process allows us to produce high quality, simple or complex components on a fully automated basis at high speed with materials that have changed the face of manufacturing technology over the last 50 years or so. Historical Background To understand the engineering and operation of modern day injection moulding machines, it is useful to first look at the not too distant origins of the process. The first Automotive Injection Mold machines were based around pressure die casting technology used for metals processing, with patents registered in the USA in the 1870's specifically for celluloid processing. Further major industrial developments did not occur until the 1920's when a series of hand operated machines were produced in Germany to process thermoplastic materials. A simple lever arrangement was used to clamp a two piece mould together. Molten plastic was then injected into the mould to produce the moulded component. Being an inherently low pressure process, it was limited in use. Pneumatic cylinders were added to the machine design to close the mould, although little improvement was made. Hydraulic systems were first applied to injection moulding machinery in the late 1930's as a wider range of materials became available, although the machine design was still largely related to die casting technology. Large-scale development of Plastic Mold Packaging design towards the machines we know today did not occur until the 1950's in Germany. Earlier machines were based on a simple plunger arrangement to force the material into the mould, although these machines soon became inadequate as materials became more advanced and processing requirements became more complex. The main problem with a straightforward plunger arrangement was that no melt mixing or homogenisation could be readily imparted to the thermoplastic material. This was exacerbated by the poor heat transfer properties of a polymeric material. One of the most important developments in machine design to overcome this problem, which still applies to modern processing equipment today, was the introduction to the injection barrel of a plunging helical screw arrangement. The machine subsequently became known as a 'Reciprocating Screw' injection moulding machine. The Injection Moulding Cycle The modern day process has developed and matured significantly to the level where fully automated, closed loop, microprocessor controlled machines are the 'norm', although in principle injection moulding is still a relatively simple process. Thermoplastic injection moulding requires the transfer of the polymeric material in powder or granule form from a feed hopper to a heated barrel. In the barrel, the thermoplastic is melted and then injected into a mould with some form of plunger arrangement. The mould is clamped shut under pressure within a platen arrangement and is held at a temperature well below the thermoplastic melt point. The molten thermoplastic solidifies quickly within the mould, allowing ejection of the component after a pre determined period of cooling time. The basic Plastic Injection Molding process steps with a reciprocating screw machine are as follows. Mould Close and Clamping The mould is closed within the platen arrangement and clamped using necessary force to hold the mould shut during the plastic injection cycle, thus preventing plastic leakage over the face of the mould. Present day moulding machines range from around 15 to 4,000 metric tonnes available clamping force (150 to 4000 kN). Many systems are available for opening/closing and clamping of mould tools, although usually they are of two general types. Direct Hydraulic Lock is a system where the moving machine platen is driven by a hydraulic piston arrangement which also generates the required force to keep the mould shut during the Clean Room Injection Molding operation. Alternatively, smaller auxiliary pistons may be used to carry out the main movement of the platen and a mechanical blocking arrangement is used to transfer locking pressure from a pressure intensifier at the rear of the machine, which moves only by a few millimetres, through to the platen and tool. The second type of general clamping arrangement is referred to as the Toggle Lock. In this case a mechanical toggle device, which is connected to the rear of the moving platen, is actuated by a relatively small hydraulic cylinder, this provides platen movement and also clamping force when the toggle joint is finally locked over rather like a knuckle arrangement. Injection At this stage in the machine cycle the helical form injection screw (Figure 1) is in a 'screwed back' position with a charge of molten thermoplastic material in front of the screw tip roughly equivalent to or slightly larger than that amount of molten material required to fill the mould cavity. LSR Injection Molding screws are generally designed with length to diameter ratios in the region of 15:1 to 20:1, and compression ratios from rear to front of around 2 : 1 to 4 : 1 in order to allow for the gradual densification of the thermoplastic material as it melts. A check valve is fitted to the front of the screw such as to let material pass through in front of the screw tip on metering (material dosing), but not allow material to flow back over the screw flights on injection. The screw is contained within a barrel which has a hardened abrasion resistant inner surface. Deep-well plates are used in a wide variety of applications including compound storage, fraction collection, sample mixing and preparation. Choosing the correct Deep Well Plate for your application can mean the difference between indifferent and great results. The easy-to-use guide provides selection advice on the use of 24-, 48-, 96- and 384-well deep-well plates that offer individual good volumes from 10ml to 50-microlitres. The flow charts also enable you to select the optimum deep-well plate not only by the number of wells but also by well shape, plate height, plate color, rimmed/unrimmed or the need for sterility.
Дата Публикации: 16-12-21
Fabric Guide: What Is Silk? How to Use and Care for Silk Fabric
Описание: Fabric Guide: What Is Silk? How to Use and Care for Silk Fabric Silk is a natural fiber known for its luster, shine, strength, and durability, and it has a long trading history across the world. Silk is the epitome of luxury due to its high cost to produce, soft feel, and elegant appearance, and it is thus a popular textile in high-end and couture fashion design. What Is Silk? Silk Yarns are natural fibers produced by insects as a material for their nests and cocoons. There are several types of insects that produce silk, including silkworms (the most common type of silk), beetles, honey bees, bumble bees, hornets, weaver ants, and many more. Made primarily of a protein called fibroin, silk is known for its shine and softness as a material. What Is the History of Silk Production? The earliest example of Silk Fabrics comes from China when it was used in a child’s tomb to wrap the body. China dominated the silk industry for many years, and initially the material was reserved for the Emperor. The Chinese used silk as a form of currency, and cost was measured in lengths of silk. The Silk Road, which connected industries from the East to the West, was a popular trading route named for the material, and that region of the world, still maintains the name today. Eventually, silk production moved to Korea, Thailand, India, and Europe. The material finally made its way to the U.S. in the seventeenth century. King James, I introduced silk to the colonies, but many of the country’s early settlers couldn’t afford the material. Patterson, New Jersey and Manchester, Connecticut both became centers of silk production in the United States, until the trade and production was disrupted by World War II, leading to the creation of synthetic fabrics like nylon. How Is Silk Made? The process of making Silk Crepe Satin Fabric is called sericulture, and it involves harvesting silkworms for the material. Larvae are fed mulberry leaves. After they have moulted several times, they spin a cocoon. The silk solidifies upon contact with air. This process takes about 2 to3 days. Once the cocoon is formed, it is dropped into a pot of boiling water effectively killing the pupaeThe silk filament is extracted by brushing the cocoon. The raw silk is woven or knit into a fabric or spun into a yarn. Note that it takes about 2500 silkworms to spin a pound of raw silk. Each cocoon contains about a mile of silk filament, and one thread of silk is made of 48 silk filaments. Different weaving processes result in different types of fabric, including crepe (a rough crinkled texture), organza (a thin, sheer fabric), and chiffon (a lightweight, plain-weave fabric with a slight stretch). What Are the Pros and Cons of Silk Fabric? Silk is known for its beautiful drape and absorbent nature, along with other positive factors, including: Texture. Silk Twill Fabric is incredibly soft with a flattering sheen, giving it a high-end and luxurious appeal. Strength and durability. It is also one of the strongest natural fibers, though some of its strength diminishes upon getting wet. Silk is often blended with other fibers, such as cotton, for added sturdiness. Elasticity. The material’s flexibility makes it ideal for garments and upholstery.Absorbency. Silk is one of the most absorbent fabrics, therefore it handles moisture well in clothing items. However, silk has some drawbacks as well, including: Static cling. Since the material does not conduct electricity well, it can experience a lot of static. Shrinkage. The fabric shrinks in the wash so a silk clothing item should always be dry-cleaned or the material should be washed before the clothing item is constructed. 8 Primary Uses for Silk Fabric Silk is primarily used in garments and household items, but it is also employed in unexpected ways, such as in bicycle tires and in medicine. Silk Stretch Fabric is great for summer clothing because of its absorbent nature and how it wicks moisture, and it is also a staple for winter wear since it has low conductive properties. Here are some examples of the material’s many uses. Bridal and formal wear. Silk is a staple of many gowns and dresses thanks to its beautiful drape, and the long floats of yarn on one side create a dressy and lustrous appearance. Ties and scarves. The material’s strength and nuances with color make it ideal for accessories. Many high-end ties are made from heavy silk, which allows for tightly woven patterns, rich colors, and durable material. Silk is also a great material for scarves for both decoration and for warmth. Bedding. Silk Scarves sheets are the height of luxury and the material’s softness and absorbent nature makes it truly shine in the bedroom. Parachutes. Silk was originally used for parachutes for its strength and elastic properties; however nylon is more commonly used today. Upholstery. Silk is used to cover furniture and pillows, and thanks to its strength and durability, it provides a long-lasting covering. Wall hangings. Decorative wall hangings are often woven from silk, as the material is beautiful and dynamically reacts with colors and dyes. Bicycle tires. The material is sometimes used in the tire’s casing because of its lightness, durability, and flexibility. Since silk can be expensive, the casings can also be made from nylon and cotton. Surgical sutures. Since silk is a natural material, it has amazing uses in medicine. The material does not cause an autoimmune response and cannot be absorbed by the human body. Home textile is a branch of technical textile comprising the application of textiles in household purposes. Home textiles are nothing but an internal environment, which deals with internal spaces and their furnishings. Home textiles are mainly used for their functional and aesthetic properties which provides us a mood and also give mental relaxation to the people. Definition Of Home Textile Home Textiles can be defined as the textiles used for home furnishing. It consists of a various range of functional as well as decorative products used mainly for decorating our houses. The fabrics are used for home textiles consist of both natural and man-made fibers. Sometimes we also blend these fibres to make the fabrics stronger. Generally, home textiles are produced by weaving, knitting, crocheting, knotting, or pressing fibers together. Different Types Of Home Textile Products A considerable portion of home furnishings consists of textiles. A number of these furnishings are typical in households and are made according to certain general methods of construction and composition. The basic items may be grouped as Sheets and Pillowcases, Blankets, Terry towels, Table cloths, and carpets and Rugs.
Дата Публикации: 16-12-21
Disposable Safety Clothing: Which is the Best One for the Job?
Описание: Disposable Safety Clothing: Which is the Best One for the Job? The staple of protective Disposable Clothing is The Type 5 & 6 coverall, alternatively known as “disposable”, "single-use" or sometimes even "paper" coveralls (although they are not paper!). They are relatively simple to produce, throw-away and comparatively cheap. Consequently, many users focus on price as the main criteria of selection – especially given the complexity of the many options available on the market. Disposable Coveralls are as much an item of PPE as any other type of safety equipment. They are designed to protect against hazards that – whilst not immediately life threatening in the way that concentrated sulphuric acid or a brick falling from a great height is – may result in serious consequences... especially in the long term. Disposable Type 5 & 6 coveralls are not all the same and just like any other PPE ensuring appropriate protection means understanding the differences so that the right coverall – the best choice for the application – can be selected. What Is the Difference Between Type 5 & 6 Disposable Safety Clothing? The European standards for chemical protective Disposable Gown originally identified 6 “types” of chemical protection, labelling them as “Types” 1 to 6. Whilst there are now only 5 after Type 2 was removed by the 2015 version of EN 943, these “Types” have become by-words for the different clothing suitable for the types of protection identified:- These Types relate to either the form of the hazard (liquid, dust or gas) and the form of physical liquid spray (aerosol, spray or jet-spray). However, whilst a useful starting point any analysis based solely on these Types – such as a simple decision to use a basic Type 5 and 6 coverall for a particular application only because it features an aerosol spray - is limited and simplistic for reasons explained in the panel below. A more detailed analysis of the specific properties of the available garment options combined with an analysis of the features of your application is vital to ensure selection of the best option for the task in hand. What are face masks? Disposable Face Masks such as cloth or fabric masks act as a simple barrier and work as "source control". “Source control” refers to preventing the wearer’s respiratory droplets from travelling into the air and onto other people when the person wearing the mask coughs, sneezes, talks etc. These are not suitable for use during medical and surgical procedures in healthcare facilities, where exposure and risk of transmission of infection is higher. These masks may be used by the general public and in community settings. Please refer to MOH’s guidance and FAQs on the use of masks. Face masks are not regulated as medical devices under the Health Sciences Authority (HSA). Therefore, the quality and effectiveness of face masks are not regulated by HSA. The last thing a consumer wants to find in their food or pharmaceutical product is human hair and for this reason hygienic work environments are critical to businesses that make or package consumer food products, pharmaceuticals, assemble electronics or treat patients. Hospitals need to keep wounds free from infection and factories can't afford production shutdowns or product recalls because of human contamination. This is why most factories ask their employees to wear disposable bouffant hair caps for their production. Disposable Headwear is lightweight and comfortable to wear, but also inexpensive, simple to use and provides effective protection against product contamination. Bouffant caps not only prevent contamination but also keep hair away from workers' eyes, therefore increasing their efficiancy during work. Bouffant caps differ from hairnets. Hairnets are made of nylon or polyester mesh material and are designed to stretch over the head and mat down the hair but if you look at one closely, you will notice a webbing effect. The webbing has openings or small holes which could i allow hair to pass through whereas a bouffant cap is made from a layer of non woven fabric that has no slight openings. Another difference between a hair net and bouffant cap is that a hair net cannot be easily distinguished when worn whereas a bouffant cap stands right out making it easier for compliance checks. Bouffant caps also present a clean look-n-feel to guests who might visit the plant for a tour. What are Disposable Bed Sheets? As the name suggests, Disposable Non-Woven Bed Sheets are those that you can dispose of when necessary. They are biodegradable, which means that you don’t have to worry about destroying the environment. Just pop the used sheets in the compost and move on with things. These sheets are easy to put on, as well as remove from the bed. They’re thick enough to protect your mattress, and they save a lot of effort and time in the morning. Their major advantage, though, is the fact that they’re compostable, which means you do not have to worry about washing them. Just use and dispose of. Disposable bed sheets provide a versatile and highly cost-effective solution while still assuring optimum comfort and hygiene. They come in various sizes and are often white so they will easily go with the rest of your room. Disposable Footwear acts as a barrier to their surrounding environment and stop the spread of contaminants that come into contact with your shoes. By wearing shoe covers, you can help eliminate the spread of dirt, dust, and germs; this can be from the outdoors or from other rooms, simply by changing your shoe covers before entering a new room or space. Using shoe covers helps keep your surrounding environment clean and free from unwanted materials. Disposable Shoes Covers are an important part of PPE precautions. Since the outbreak of the COVID-19 virus, PPE, including shoe covers, has played a massive role in protecting healthcare workers and slowing the spread of COVID-19. Shoe covers can protect those who work in all healthcare fields, including hospitals, doctors’ offices, nursing homes, outpatient care, and more. They can also help eliminate spreading harmful particles, dirt, and debris to different areas of the hospital, office, workplace, etc.
Дата Публикации: 16-12-21
Which skate frame for which use?
Описание: Which skate frame for which use? Each skating discipline requires special frame features. You’ll need handiness and reactivity in slalom, rigidity and efficiency in speed, comfort in long-distance, solidity and sliding in street, etc. Frames can be molded, pressed, extruded or cast in one piece. Three other processes also exist for composite frames with carbon basis, they are detailed in our article written in collaboration with EOSkates on the making of composite frames. Molded/injected frames It is the most common manufacturing process for frames made of plastic, the material is injected into a mold of the shape of the frame. That process is inexpensive and it is used for entry level products in the fitness range as well as for street Skating Frames. Pressed frames Take a metal slab, most of the time it is aluminum, and press it to give it the shape you want. That process is common for mid-range fitness and long-distance skates. At BJ Concept’s, a French manufacturer of speed frames, the process is slightly different: An aluminum foil is laser cut and folded with a press brake. Then the bearing seats are embossed and the screw heads are milled. All it is left is to polish the surface of the frame to remove the manufacturing traces and anodize it in black. HOW THE SKATE BLADES FUNCTION Every Ice Skate Blade has an inside and outside edge and a groove between the edges, called the "flat" of the blade. The sole function of the flat of the blade is to glide straight forward and straight backward. To be on the flat you must stand so that the skate is upright (blade perpendicular to the ice). You will be gliding equally on both edges and in a straight line. Edges have multiple functions. Blade edges are designed to cut into the ice. Because blades are rockered (have a radius) they are also designed to curve. Therefore, edges have two functions: To create a grip into the ice and set up the possibility for a powerful push, and To travel a curved path. The pushing skate is the one that must grip the ice to set up a powerful push. The gliding (directional) skate is the one that must be on a strong edge so that you can travel tight curves. These two functions are totally separate and distinct from one another. One skate digs in to push while the other digs in to travel a curve or circle. It may be said that the Wheels Aluminium Hub is the heart of the wheel and certainly has a big job to carry out. Firstly, the hub provides an anchor point for the spokes and holds the bearings in place so the wheel can spin. Secondly, the rear hub holds the cassette or sprocket which transmits the forces from pedalling via the hub body to the spokes ultimately propelling the rider forward. Lastly, the hub provides a sound mounting point for the brake rotor and an anchor point- through the use of quick release or bolts- to keep the wheels and frame attached. At the very cheapest end of the industry, hubs are made from three pieces of steel – two pieces for the spoke flanges and one tube in between. In the middle price range sits one piece aluminium hubs. These can be machined or forged from a chunk of alloy. Small production runs and intricate shapes rely on the machining process whereas large production runs and smooth, flowing shapes work better with the forging process. Many of the high end hubs return to the three piece construction paradigm; often with exotic dissimilar materials for the flanges and the hub centre tube. Another area where hubs fall into two camps is in the bearings. Most hubs have a cartridge bearing pressfitted into the central tube. If something goes wrong with the bearings, they can be fairly easily replaced with an entirely new unit (including hybrid- and full-ceramic options). The more traditional bearing option is the cup and cone design. Inside the hub shell is a steel cup that holds the ball bearings, while on the axle is a cone that holds the balls against the cups allowing the load to get from axle to hub shell. Cup and cone hubs are more easily adjusted and repaired than the cartridge bearing option, however, once the cup is damaged you are usually looking at a replacement hub. The Alu Spacer is a spacer profile manufactured with special aluminium alloys, is characterised by the following dimensions: height of 6.5 millimetres, length of 4, 5 or 6 metres, and width ranging from 4 to 26.5 millimetres. The thickness varies according to the end-use of the spacer. The bars can be packed into cardboard boxes of different lengths (4, 5 or 6 metres) or into steel containers with a capacity of 5 or 6 metres. In the latter case, thin sheets of paper can be inserted between the bars in order to keep them separate and the spacers can be fastened into bundles of 17 bars. It can be used in the production of frames with corner keys, bent using all current bending machines available on the market and also supplied, on request, with pre-inserted plastic or steel connectors. Its range can be supplied in the following colors: Mill Finish, Anodized, Anodized Gold, Anodized Clear Bronze, Anodized Black, Painted White, Painted Black and Painted Medium Bronze. Further, for huge orders, we can provide our customers with non-standard products in order to satisfy their particular needs. The sheer range of stuff available in a typical bike shop can be bewildering. What’s a hydration bladder? Why might you need a turbo trainer? Are mudguards really necessary? In reality, many people cycle happily in their normal clothes, possibly with just a rucksack to carry things. But if you do ride regularly, whether to keep fit or for commuting, there are a number of Bicycle Accessories that can make your time on two wheels easier, safer and more comfortable. Some are essential, while others are nice to have.
Дата Публикации: 16-12-21
Welding Equipment
Описание: Welding Equipment Electric Welding Machine refers to machines apparatus, and jigs and fixtures required for the fabrication of welded articles from semifinished stock. A welding position, or station, is a set of welding equipment for operations that require some degree of participation by a welder. A welding line combines several welding stations. Welding stations may be used in arc welding, resistance welding, gas welding, electron-beam welding, or other methods. The welding equipment includes the ARC Stick Welding Machine, power supplies, and devices directly used to conduct the welding process, jigs and fixtures for the rapid assembly of the parts to be welded, for holding the parts during welding, and for preventing or reducing warpage of the welded articles, auxiliary equipment used for transporting the parts during welding and for mounting and transporting the welding apparatus, and various other tools used by the welder. Various transport means and instruments for controlling weld quality are also used in the welding process. The technical characteristics of welding equipment are determined by the welding method chosen, the type of production, and the degree of mechanization, that is, whether manual, semiautomatic, or automatic welding is performed. A welding station is a section of a production area where a power supply, current-carrying conductors, and necessary jigs, fixtures, and welder’s tools are located. In order to protect personnel in the area from radiation, the welding station is enclosed by curtains or panels. Fixed automated stations are widely used in modern manufacturing processes; such stations are located in manufacturing shops. Mobile stations are used in the field for welding large objects in construction and repair work. Welding stations include power supplies and equipment for the regulation of the arc during welding. Power supplies used in welding should provide a convenient, continuous or step control and must satisfy general requirements for electric machines and equipment. AC DC TIG Welding Machine, transformers, generators, and rectifiers are used in electric welding; gas generators are used in gas welding. Power supplies may be single-position or multiposition types, stationary installations for continuous, long-term operation, or small, portable units for work of short duration. A welding transformer is used to match the parameters of the welding circuit and the power supply; it also functions as a voltage regulator. In Stud Welding Machine, the voltage is regulated mechanically or electrically. In the former case, the distance between the primary and secondary windings is altered. Electrical regulation is accomplished by changing the control currents in supplementary windings, located on the upper and middle field frames of the transformer. In this method, the secondary winding is divided into two sections, one of which is located in the upper window of the transformer. Such a transformer is capable of producing various no-load voltages without a change in the turn ratio; this property is required for welding adjustments. Welding transformers used in resistance welding have a minimum short-circuit resistance and a secondary winding that usually consists of one or two turns. Changes in secondary voltage are achieved by tapping sections of the turns of the primary winding. Air Plasma Cutting Machines are becoming an increasingly common tool in many industries such as metal fabrication, construction and automotive repair. This tool is able to cut through several types of metal including steel, copper, brass and aluminium by generating an extremely high-temperature, electrical channel of ionised gas otherwise known as plasma. To create the 4th matter – the plasma – the cutter sends an electric arc through a gas, (either oxygen, nitrogen or argon) which rapidly increases the heat levels to the point where it goes beyond a solid, liquid or gas and becomes plasma. The machine will then use the plasma to transfer the energy to any conductive metal, allowing it to cut through with very little or no resistance. This method results in a clean, fast cutting process. Laser Welding Machine or laser beam welding is one of the most widely known, accurate types of welding processes. It is a non-contact, high power density welding process used to join multiple pieces of material together using energy emanating from a laser beam. Aerospace, defense and military, medical, electronics, petrochemical refining, communications and energy are some of the common areas where laser welding techniques are applied extensively. Deep weld penetration and minimized heat inputs are the special characteristics that set laser welded products apart from other conventional welding processes; Pulsed or continuous laser beams are used depending upon the welding application; There are many types of laser welding available and the most popular types include Nd:YAG laser welding, CO2 laser welding, and diode pumped laser welding; Deep narrow welds, without any distortion, and minimal heat-affected zones can be obtained using our laser welding machines that can function at increased travel speeds.
Дата Публикации: 16-12-21