High-gloss Seamless Injection Mold and Molding Technology

PVC Plastic Tube Core Manufacturer to explain the principle of high-gloss seamless injection molding technology.

We compare the traditional injection molding process to illustrate the characteristics of the high-gloss seamless injection molding process. In the conventional ordinary injection molding process, when the mold temperature is set low, although it can reduce warpage and shrinkage, shorten the molding cycle, it is easy to produce. The appearance of weld lines, texture, darkness, and rough surface are poor. On the contrary, when the mold temperature is set high, the appearance quality of the surface of the product can be improved, but warpage, sink marks, dimensional defects, and the like are likely to occur, and the molding cycle is prolonged and the cost is increased.

The high-gloss seamless injection molding technology uses a special quick-cooling speed thermal temperature control device to solve both problems at the same time. It utilizes steam generated by a steam oven or high-temperature water and cooling water to control the temperature of the mold during a molding cycle by rapid exchange, thereby enabling the advantages of both methods to be utilized.

First, before the injection, high-temperature water or steam is introduced into the mold (for example, the temperature is 150 ° C), so that the temperature of the mold reaches a viscous temperature exceeding the thermal deformation of the resin, and then the molten resin is injected, so that the temperature of the front end of the material can be maintained. In the viscous flow state, a molded article having no surface (melt line) and good surface quality are formed. After the injection of the molten resin is completed, the cooling process is started. Cooling water is used to rapidly lower the temperature of the mold below the temperature at which the resin is thermally deformed (e.g., 40 ° C). In this way, the molding cycle can be shortened by speeding up the curing speed of the resin, and problems such as warpage and sagging can be solved.

High-gloss non-marking injection can eliminate the surface melting, splicing, corrugation and silver thread on the surface of the product, completely solve the surface shrinkage phenomenon of the plastic product, and make the surface smoothness of the product reach the mirror level, almost completely reproduce the surface state of the mold, and achieve no trace. Effect.

The product does not require subsequent processing of the spray, which effectively reduces costs and shortens delivery time. In addition, high-gloss injection molding can also solve the phenomenon of floating fiber produced by fiber-added products, so that the product quality is more perfect. In thin-wall forming, injecting molten resin at a high temperature helps to improve injection molding fluidity, reduce injection pressure, avoid problems such as insufficient pouring and gas trapping, and improve product quality and strength. Moreover, by the rapid cooling after molding, the shrinkage stress can also be reduced, and the demolding can be facilitated. At the same time, it can also reduce the injection molding cycle of thick-wall molding by about 60-70%.

Our company produces a variety of high-quality Injection Plastic Plugs, you are welcome to inquire.