The plastic mold includes a cavity with a variable cavity composed of a cavity combination substrate, a cavity component, and a cavity combination card. A convex die with a variable core composed of a side-section composite plate. Plastic mold processing plays an important role in the release of new industrial products. Today Jiehui Chuangxiaobian will take you to understand some basic knowledge of plastic molds.

1. Synthetic resin is the main component of plastic, and its content in plastic is generally 40% to 100%. Because the content is large, and the nature of the resin often determines the nature of plastic, people often regard resin as a synonym for plastic. For example, polyvinyl chloride resin and polyvinyl chloride plastic, phenolic resin and phenolic plastic are mixed. In fact, resin and plastic are two different concepts. Resin is an unprocessed virgin polymer that is not only used to make plastics, but also a raw material for coatings, adhesives, and synthetic fibers. In addition to a very small proportion of plastics containing 100% resin, most plastics, in addition to the main component resin, need to add other substances.

2. Filler Filler is also called filler, which can improve the strength and heat resistance of plastics and reduce costs. For example, adding wood powder to phenolic resin can greatly reduce the cost, making phenolic plastic one of the cheap plastics, and at the same time, it can significantly improve the mechanical strength. Fillers can be divided into two types: organic fillers and inorganic fillers, the former such as wood flour, rags, paper and various fabric fibers, and the latter such as glass fiber, diatomite, asbestos, carbon black and the like.

3.可塑剤可塑剤は、プラスチックの可塑性と柔らかさを高め、脆性を低減し、プラスチックの加工を容易にします。 可塑剤は一般に、樹脂と混和性があり、毒性がなく、無臭で、光と熱に対して安定している高沸点有機化合物です。 フタル酸エステル類が一般的に使用されています。 例えば、ポリ塩化ビニルプラスチックを製造する場合、可塑剤をさらに添加すると、柔らかいポリ塩化ビニルプラスチックを得ることができます。 可塑剤を添加しないか、添加しない場合（投与量<10％）、硬質ポリ塩化ビニルプラスチックを得ることができます。 。

4.安定剤合成樹脂の加工・使用時の光や熱による分解・破壊を防ぎ、寿命を延ばすために、プラスチックに安定剤を添加する必要があります。 一般的に使用されるのは、ステアリン酸塩とエポキシ樹脂です。

5. Colorants Colorants can make plastics have various bright and beautiful colors. Organic dyes and inorganic pigments are commonly used as colorants.

6. Lubricant The function of the lubricant is to prevent the plastic from sticking to the metal mold during molding, and at the same time, make the surface of the plastic smooth and beautiful. Commonly used lubricants are stearic acid and its calcium and magnesium salts. In addition to the above additives, flame retardants, foaming agents, antistatic agents, etc. can be added to the plastic.