injection molding process

In the injection molding process, the mixture is heated in a jet into a plastic cylinder rheology of materials and, where appropriate injection pressure injected into the mold , forming a blank . Should be uniform on the micro- injection molded blank is consistent , so that the product uniform shrinkage during sintering . Extraction molded blank before sintering to remove the organic binder contained in the blank , the process is called extraction . Extracted from different parts of the process must ensure that the blank gradually discharged adhesive along tiny channels between granule , without reducing the strength of the blank . Binder exclusion rates generally follow the diffusion equation .

Sintered porous sintered make skim blank shrink to become densified article having a certain organization and performance. Although product performance and many technological factors related before sintering , but in many cases , the sintering process on microstructure and properties of the final product has a great , even decisive impact. After treatment the size requirements for more sophisticated parts , the need for the necessary post-processing. This step and the heat treatment step is the same as a conventional metal products .