JIANGSU XINLEI MOULD & PLASTIC CO., LTD. Introduces what the plastic mold mainly includes?
A concave mold with a variable cavity composed of a concave mold combined substrate, a concave mold assembly and a concave mold combined card board, composed of a convex die combined substrate, a convex die assembly, a convex die combined card board, a cavity cut-off assembly and a side cut A punch with a variable core composed of a composite board.
In order to improve the performance of plastics, it is necessary to add various auxiliary materials to the polymer, such as fillers, plasticizers, lubricants, stabilizers, colorants, etc., to become plastics with good performance.
1. Synthetic resin is the most important component of plastic, and its content in plastic is generally 40% to 100%. Because of the large content, and the nature of the resin often determines the nature of the plastic, people often think of resin as a synonym for plastic. For example, mix polyvinyl chloride resin with polyvinyl chloride plastic, phenolic resin and phenolic plastic. In fact, resin and plastic are two different concepts. Resin is an unprocessed raw polymer, which is not only used to make plastics, but also as a raw material for coatings, adhesives and synthetic fibers. In addition to a very small part of plastic containing 100% resin, most plastics, in addition to the main component resin, also 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 cheapest plastics, while also significantly improving the mechanical strength. Fillers can be divided into organic fillers and inorganic fillers, the former such as wood flour, rags, paper and various fabric fibers, etc., the latter such as glass fiber, diatomaceous earth, asbestos, carbon black and so on.
3. Plasticizers Plasticizers can increase the plasticity and flexibility of plastics, reduce brittleness, and make plastics easier to process. Plasticizers are generally miscible with resins, non-toxic, odorless, light- and heat-stable high-boiling organic compounds, and the most commonly used are phthalates. For example, in the production of PVC plastics, soft PVC plastics can be obtained if more plasticizers are added, and hard PVC plastics can be obtained if no or less plasticizers are added (amount <10%). .
4. Stabilizer In order to prevent the synthetic resin from being decomposed and destroyed by light and heat during processing and use, and to extend the service life, a stabilizer should be added to the plastic. Commonly used are stearate and epoxy resin.
5. Colorants Colorants can make plastics have various bright and beautiful colors. Commonly used organic dyes and inorganic pigments as colorants.
6. Lubricant The role of the lubricant is to prevent the plastic from sticking to the metal mold during molding, and at the same time make the plastic surface smooth and beautiful. Commonly used lubricants include stearic acid and its calcium and magnesium salts. In addition to the above additives, flame retardants, foaming agents, antistatic agents, etc. can also be added to the plastic.