Injection mold is a combination of plastic mold steamed by pressing and injection molding, mainly consisting of a combination substrate, mold assembly and combination card composed of cavity mold and by the combination substrate, mold assembly composed of a core mold, a mold combination card, a type of mold cutting parts and a side cutting combination plate. The coordinate series of punches, molds and auxiliary forming systems can be machined for a series of plastic parts of different shapes and sizes.

1. Synthetic resin is the main component of plastic, its plastic content is usually 40% to 100%. Because of the large content, but the properties of resin often determine the nature of plastic, so people are often associated with plastic resin synonymous. For example, PVC resins are confused with PVC, phenolic resins and phenolics. In fact, resin and plastic are two substances. Raw resins are pure polymers that are used not only in the manufacture of plastics, but also in paints, adhesives and synthetic materials. In containing 100%, the vast majority of plastics, in addition to the main components of the resin plastic resin added to a very small part, but also need to add other substances.

2. Plasticizer can improve the plasticity and softness of plastic, reduce brittleness, so that plastic easy to process molding. Plasticizer is a high boiling-point organic compound that can be mixed with resins, non-toxic, odorless, photocycle, and good thermal stability, most commonly used in phthalates. For example, in the production of PVC plastics, if more plasticizers are added, soft PVC plastics can be obtained, and rigid PVC plastics can be obtained if the amount of plasticizers is not added or smaller (the dose is less than 10%).

3. Used to prevent synthetic resins from being used in the processing and use of decomposition and destruction, long-lived stabilizers, in order to add stabilizers to plastics.

4. Colorant colorants can make plastics have a variety of bright colors, colorants are generally organic and inorganic dyes.

5. When plastic is formed, lubricant lubricant is used to prevent plastic from sticking to metal molds, while the plastic surface is smooth and beautiful.