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Structure of plastic mould

release time:2017-11-11 | Article Source:

  The plastic mold includes die with variable cavity composed of concave die and die combination of substrate components and die combination board、die with flexible core is composed of a convex mold substrate、punch assembly、punch card、combination cavity blocking assembly and side cutting plate.


  In order to improve the performance of plastics、but also add various auxiliary materials in the polymer、such as filler、plasticizer、stabilizer、lubricant、coloring agent、can become the good performance of plastics.


  1、synthetic resin is the most important component of plastics、its content in plastics is generally in the range of 40% ~ 100%. Because of the large content and the nature of the resin often determines the nature of the plastic、so people often regard the resin as a synonym of plastic. For example、the PVC resin and PVC plastic、phenolic resin and phenolic plastic confused. In fact、resins and plastics are two different concepts. Resin is an unprocessed primitive polymer、which is used not only for plastics、but also for paints、adhesives、and synthetic fibers. In addition to a small amount of plastic containing 100% of the resin、the vast majority of plastic、in addition to the main component resin、but also need to add other substances. 2、filler is also called filler、it 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 plastics become one of the cheapest plastics、and also can significantly improve the mechanical strength. Packing can be divided into two kinds of organic fillers and inorganic filler、the former such as wood powder、rags、paper and all kinds of fabric、the latter such as glass fiber、diatomite、asbestos、carbon black.


  3、plasticizer plasticizer can increase the plasticity and softness of plastics、reduce brittleness、make plastics easy to process molding. Plasticizers are generally miscible with resins、nontoxic、odorless、and highly volatile organic compounds that are stable for light and heat. The most commonly used plasticizers are phthalic acid two esters. For example、the production of PVC plastics、adding more plasticizer can be soft PVC plastic、if without or with small amount of plasticizer (dosage <10%)、is a hard polyvinyl chloride plastic.


  4、in order to prevent the stabilizer of synthetic resin by light and heat in the processing and use of the process of decomposition and destruction、prolong the service life、to add in plastic stabilizer. Commonly used stearate、epoxy resin and so on.


  5、colorant、colorant can make the plastic has a variety of bright、beautiful color. Commonly used organic dyes and inorganic pigments as colorants.


  6. The function of lubricant and lubricant is to prevent the plastic from sticking on the metal mould during molding、and to make the surface of the plastic smooth and beautiful. The commonly used lubricants are stearic acid and calcium magnesium salt. In addition to the above additives、plastics can also be added flame retardant、foaming agent、antistatic agent、etc..