even millions — of identical parts of a specific dimension
even millions — of identical parts of a specific dimension and quality. Plastic injection molding involves injecting molten plastic into a mold (or cavity), which defines its molded part’s shape after it solidifies. The basic requirements for the process are the injection-molding machine, raw plastic material and the mold. The injection-molding machine consists of a hopper, through which pelletized plastics are fed into the machine; a heating barrel with a reciprocating screw; and an injection nozzle. The most common thermoplastics utilized in injection molding are nylon (PA), polycarbonate (PC), polypropylene (PP) and acrylonitrile-butadiene-styrene (ABS). Molds used can be single- or double-cavity type, depending on the application. Tooling Investment Costs. When a [url=http://www.yhmould.net/plastic-mould/electric-car-mould/]electric car mould[/url] part is being manufactured for the first time, the design is first prototyped with a test material to ensure accuracy using techniques such as 3D printing or CNC machining. The mold tool is made of steel or aluminum material and must be designed to precise dimensions. Prototyping and Testing. With injection molding, manufacturing companies must carry out extensive testing and prototyping of the entire system using replicas. Any subsequent modifications to the final design will require either modifying the tools or scrapping them completely — both of which could add significant costs to the production budget.
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