Double Color Plastic Shell Mould Injection Molding is a widely used molding technology in industrial production, which makes the products feature multiple colors, materials or textures. In the double color plastic shell mold injection molding, need to pay attention to the following important matters:
First of all, it is very important to design the mold structure reasonably. The mold structure should ensure that the materials of the two plastics can be injected smoothly and can be positioned and bonded together correctly. Factors such as the flow path and cooling system during each injection, as well as the shrinkage and thickness distribution of the molded part, should be taken into consideration. Defects or deformations can be minimized through reasonable mold structure design.
Secondly, for double color injection molding, the selection and compatibility of plastic materials is very important. Make sure that the two plastic materials used can be well bonded together and can meet the requirements of the product. When selecting materials, it is necessary to consider their performance parameters such as melt index, viscosity, fluidity and shrinkage, as well as their chemical and physical compatibility when they are in contact with each other.
Thirdly, the control of injection molding temperature and pressure is also critical. Different plastic materials have different melt temperatures and injection temperature ranges, and the appropriate injection temperature needs to be determined according to the material properties. In addition, the appropriate injection pressure can ensure that the two colors or materials of plastic can be fully mixed and bonded together, and can fill the mold cavity intact.
Attention also needs to be paid to the finish and lubrication of the mold surface. The surface finish of the mold is very important for double-color injection molding, you can use polishing, plating or sandblasting and other ways to deal with, in order to reduce friction and resistance, to ensure the quality of the surface of the molded product. At the same time, in the injection molding process need to give appropriate lubrication of the mold at the right time, in order to reduce the friction and wear in the injection molding process.
Finally, the control of process parameters in the injection molding process is also one of the keys. Including the melt temperature, injection speed, holding time and other parameters of reasonable control can directly affect the quality of molded products. By accurately adjusting and optimizing these parameters, defects such as air bubbles, heat retention marks and uneven color can be avoided.
