Injection Molding is by far the industry’s most common way to manufacture plastic parts, especially when making larger quantities. It involves melting granular plastic pellets into a liquid form and then compressing this liquid into the empty cavity of a mold tool. The plastic will retain the shape of the mold as well as the surface texture of the walls of the cavity. After an optimized injection and cooling phase, the now solidified plastic part is ejected and the molding cycle is repeated. This molding cycle can take from as little as a few seconds to several minutes depending upon part size, molding resin and part design.
Characters of injection molding
1) Each silicon mold can duplicate 15-20 pieces of prototype only.
2) Different codes of PU materials are available in vacuum casting so that different kinds of mechanical properties of ABS, POM, PC, etc can be achieved.
Benefits of injection molding
1) Save cost: No investment cost required comparing with hard tooling.
Much more cost-effective to get a hundred pieces comparing with CNC and SLS/SLA methods.
2) No color peel-off problems.
3) Fast to get a few pieces to hundred pieces (Normally 7 to 12 days).
4) Different types of transparent color and rubber are available.