Injection molded parts refer to various injection molded products produced by injection molding machines, collectively referred to as injection molded parts, including various packaging, parts, etc. It is mainly made of materials such as polyethylene or polypropylene and added with a variety of organic solvents. The choice of plastic parts is ma
Plastic molding is the process of making various forms (powders, pellets, solutions and dispersions) of plastics into articles or blanks of desired shapes. There are as many as thirty kinds of molding methods. The choice of plastic molding is mainly determined by the type of plastic (thermoplastic or thermoset), the starting form, and the shape
Plastic molding process After the plastic part is taken out of the mold and cooled to room temperature, the dimensional shrinkage occurs, which is called shrinkage. Since shrinkage is not only the thermal expansion and contraction of the resin itself, but also related to various forming factors, the shrinkage of the plastic part after forming shou
Plastic molding process The ability of a plastic to fill a cavity at a certain temperature and pressure is called fluidity. This is an important process parameter that must be considered in mold design. High fluidity is easy to cause excessive overflow, uncompact filling cavity, loose plastic parts, separate accumulation of resin and filler, easy
Plastic molding process Thermosetting plastics are transformed into a plastic viscous flow state under heating and pressure during the forming process, and the fluidity increases to fill the cavity. At the same time, a condensation reaction occurs, the crosslinking density increases continuously, the fluidity decreases rapidly, and the melt gradua
