mold manufacturers 5 knowledge points about injection molds
Date: September 29, 2024
Injection mold is a composite plastic mold used for compression and injection molding, mainly including a variable cavity mold composed of a composite substrate, mold components, and composite cards, a variable core mold composed of a composite substrate and mold components, a mold composite card, a concave mold cutting component, and a side cutting composite plate. The coordinate changes of punching machines, molds, and auxiliary forming systems can process a series of plastic parts of different shapes and sizes.
mold manufacturers 5 knowledge points about injection molds
1. Synthetic resin is the main component of plastics, with a plastic content typically ranging from 40% to 100%. Due to the large content, the properties of resin often determine the properties of plastic, so people often associate it with plastic resin. For example, polyvinyl chloride resin and polyvinyl chloride, phenolic resin and phenolic resin are confused. In fact, resin and plastic are two different substances. Raw material resin is a pure polymer, which is not only used for manufacturing plastics, but also for paints, adhesives, and synthetic materials. In plastics containing 100%, the vast majority of them require the addition of other substances in addition to a very small portion of the resin, which is the main component of the plastic resin.
2. Plasticizers can improve the plasticity and flexibility of plastics, reduce brittleness, and make plastics easier to process and shape. Plasticizer is a high boiling organic compound that can be mixed with resin, is non-toxic, odorless, has good photoperiod, and thermal stability. It is most commonly used for ortho phenyldicarboxylate. For example, in the production of PVC plastic, if more plasticizers are added, soft PVC plastic can be obtained, and if the amount of plasticizers is not added or less (dosage less than 10%), rigid PVC plastic can be obtained.
mold manufacturers 5 knowledge points about injection molds
3. A stabilizer with a long lifespan is used to prevent the decomposition and damage of synthetic resins during processing and use through photothermal treatment, and to add stabilizers to plastics.
4. Coloring agents can give plastics various bright colors, and coloring agents are generally organic and inorganic dyes.
When plastic is molded, lubricants are used to prevent the plastic from sticking to the metal mold, while the plastic surface is smooth and beautiful.
mold manufacturers 5 knowledge points about injection molds
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