Tee-injection Molding Technology
Plastic molding machines and mold developed very rapidly
, efficient, automated, large-scale, micro, precision, high-life of the mold in the mold industry, the proportion is growing. China's large, complex, sophisticated, efficient and long life mold it on to a new level, many types of mold have been able to replace imported mold, mold CAD / CAM technology has been applied to promote faster and achieved good results, Rapid Prototyping Manufacturing Technology and equipment have made considerable progress and has entered the practical stage of promotion, a new generation of manufacturing technology and other high-speed milling has been taken seriously and start applications. Point of view from the mold used to require efficient, automated, easy to operate; from mold manufacturing point of view, demands a rational structure, easy manufacture, low cost. Modern plastic products, reasonable processing technology, efficient equipment, advanced mold is essential to the three important factors.
Comparison of mold and other mechanical products, an important feature of high technology, net output in proportion. As the chemical industry, light industry and the rapid development of China's mold industry in recent years has been 13% to 15% annual growth rate of about rapid development, and all the industries demand more and more mold. The face of market changes, with high levels of mold are emerging on the market. With industrial development, industrial product varieties, an increasing number; on product quality and appearance requirements, it is becoming more attractive, China gas. Therefore, the combination of specific conditions in China, study abroad, die and mold manufacturing industry experience in building, advocacy, implementation of scientific rationalization of the mold, mold can promote technological progress.
Thermoplastic injection molding is the most important processing methods workpiece. Processed by this method of plastic molding parts, the variety and style than in any other forming method has. From the process is through and screw thrust, three tubes of plastic mold design and implementation, will have plasticizing the plastic melt into the closed mold cavity, cooled after curing mold shaped by plastic parts.
Therefore, the composition of the three necessary conditions for injection molding: one must be molten plastic into the mold cavity; second plastic melt must be sufficient pressure and flow to ensure timely and full of every corner of the mold cavity; third the need for consistent shape and size of workpieces and to meet the requirements of the mold forming process.
Injection molding technology compared with other molding technology has its unique advantages, in the following aspects: first, forming the molten plastics material and flow modeling is the difference in the plastic tube and two for cavity mold can always condensation in a melt quickly, or the state of crosslinking, which will help shorten the molding cycle; the other is to first lock the mold and then injecting the plastic melt, coupled with good liquidity lysosomal little wear and tear on the mold cavity, which can be molded with a mold large quantities of complex parts, surface graphics and mark a clear and high dimensional accuracy of products; the third molding process, mold, feeding, plastics, injection molding, mold and the top of the Kai products, and all other shape operation by the injection molding machine automatically, so that fully automated injection molding process easier and to achieve process control. But we must see the inadequacies of injection molding, due to the cooling conditions, the system difficult to use this technology without defects, changes in wall thickness has a large thermoplastic products, as injection molding machines and other injection mold cost is high, initiation molding equipment investment is high, injection molding products are not suitable for small batch production.
Also known as injection molding injection molding or injection molding, thermoplastic products is an important method of molding. Except for a handful of several thermoplastics, the almost all thermoplastics can be molded plastic parts with this method. Injection Molding of various shapes can be molded to meet the many demands of plastic workpieces. Injection molding has been successfully applied to some of the thermosetting plastic parts, rubber products, and even industrial production.
Injection molding process, the granular or powdered plastic injection machines from the hopper into the heated barrel was heated into a molten plastics, by the screw (or plunger) to exert pressure through the nozzle into the bottom of the barrel temperature , the closed mold cavity, hardened by cooling the cavity while keeping the form given sample, made by mold injection molding plastic parts, in operation, completed a cycle.
by: gaga
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