Plastic parts improve in quality at the same time, the internal stress is an important factor: it is plastic after melting in the process of injection molding because of the selection of plastic material characteristics and injection molding process parameters (mold temperature, injection molding pressure, injection molding temperature, pressure time, etc.) and a variety of reasons such as the impact and production. Internal stress in plastic products will have varying degrees of existence; serious parts will make the warp deformation or even direct fracture. The shear action between the flowing inner and outer melt, the uneven cooling rate of each part, the plasticizing and the unevenness of the demulsification force caused by the processing will cause the internal stress. The related factors that affect the internal stress of plastic products need to be comprehensively analyzed from the aspects of product design, material selection, mold design, injection molding process and so on, and the optimization measures given can optimize the performance of molded products and fully meet the requirements of use.
The plastic knob (Black plastic knobs) is in the shape of long diamond design. The top of the knob is made of metal surface and the side and inside are made of POM plastic material. The appearance of the diamond makes it easy for the operator to use the knob. The overall effect is simple and smooth. There is a groove in the middle of the plastic knob for easy operation and anti-slip effect.
