Modern mold industry has "not industrial decline". World die overall market demand, the market demand remained at 60 billion to 65 billion U.S. dollars, at the same time, China's mold industry has also ushered in a new round of development opportunities.
The mold cavity, and cooling in the cavity shape, and then die down to separate out the system through the top products from the top of the left mold cavity, the mold is closed again for the next injection, the injection molding process is carried out of the cycle.
General plastic mould is composed of the movable mould and the fixed mould is composed of two parts, the dynamic model is installed in the moving platen of injection molding machine, die installed in the injection molding machine on fixed template. In the injection molding die and the fixed mold closed form pouring system and cavity, drives the movable mould and the fixed mould separation to remove plastic products.
Although the plastic mould structure and performance of varieties, plastic products shape and structure and types of injection machine and the myriads of changes may, but the basic structure is the same.Mainly by die casting system, temperature control system, forming parts and structural parts. The gating system and molding parts are in direct contact with the plastic parts and products as plastics and change, is the most complex in the mold, the biggest change, part of the processing requirements of the highest accuracy and smoothness.
In the process of injection molding processing, the gate will sometimes stick in the gate set in the beginning, it is not easy to escape. Cause the crack damage of mold products. The operator must use the copper tip out from the nozzle, the broken plastic loose before release, seriously affecting the efficiency of production time. The main reason for this failure is the gate of cone surface finish is poor, sometimes there will be holes in the circumferential direction marks. The second is some plastic material too soft, the mold gate set in use after a period of taper hole of the small end of deformation or damage, if the mouth is too small spherical radian gate set, the gate has rivet head here. Taper runner set is difficult to work, should try to use standard parts, if need to processing, is also used to produce their own or purchase special reamer.
The main pillar for fixing and guiding role in the mold, to ensure that the core and cavity forming part of the mold in any case do not collide with each other, but not to die as pillar point or positioning piece. For example, the fixed mold will produce huge force lateral displacement at the time of injection: the plastic wall thickness not uniform, the material flow through the thick wall at high speed, have a greater pressure here; side of the plastic parts if asymmetry, such as ladder shaped distribution of mold parting surface, an opposite two side the mold by the back pressure is not equal.
The level of mould production technology has become one of the important symbol to measure the level of a national manufacturing product, because the mold determines the quality and efficiency of product and the new product development ability to a great extent. Chinese mold industry development in recent years is very active, the overseas export market is a part of China, indispensable for the development of mold industry is, at present, occupy the largest share of the export market in Hongkong is still Chinese distribution, followed by Japan and the United States, nearly half of the sum of the three is China mold exports, but China the export of mold products for low-end products, high-end market in western developed countries, share Chinese products is very low. Therefore Chinese mold industry to actively improve the quality of products to further improve the mould products in the overseas market share, so as to further promote the development of their own.
Therefore Chinese mold products to deep into the international market, and constantly open up new sales areas, also need to Chinese mould manufacturing enterprises more effort in the mold quality.