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5 obvious features of the development of injection moulding in China
Sep 30, 2017

Compared with other kinds of mould, such as stamping die, die casting mould, etc., there are 5 obvious features of injection mould manufacturing, and the analysis is as follows:
1. The cavity and core are built in shape.
Plastic parts of external and internal shape is formed directly by the cavity and core, these complex multiple-layered surface processing difficulty is bigger, especially within the blind groove cavity forming surface processing, using traditional machining method, not only requires workers technical level is high, the auxiliary fixture, cutting tools, and processing cycle is long.
2. High accuracy and surface quality, long service life.
At present, the dimensions of the normal plastic parts are required to be it6-7, surface roughness ra0.2-0.1 m, and the dimensions of the corresponding injection mould parts are required to reach it5-6, with the surface roughness under Ra0.1 m. The surface roughness of the record surface of the laser is 0.02 to 0.01 m, which requires the surface roughness of the mold to be below 0.01 m. Long life injection moulds are necessary to improve efficiency and reduce cost. The life of injection mold is generally more than 1 million times. The precision injection mould should be used to increase the thickness of the template, increase the thickness of the template, increase the support column or the conical positioning element to prevent the mould from deformation after the pressure, sometimes the internal pressure can reach 100MPa. The ejector device is an important factor affecting the deformation and dimensional precision of the products, so it is necessary to choose the best point of the top out to make the whole place even. Most of the precision injection mold is used in the structure, which requires the machining precision and interchangeability of the parts.
3. Long process flow and tight manufacturing time.
For the injection molded parts, mostly to other parts of the complete product, and in many cases are in other parts has been completed, anxiously waiting for the matching of molded parts on the market. Because the shape or size precision requirements for products is very high, and due to the different characteristics of the resin material, mould manufacturing is completed, also need to repeatedly test and correction, make the development and delivery of the goods time very nervous.
4. Remote design, remote manufacturing.
Mould manufacturing is not the ultimate goal, but the users put forward eventually products design, mould making factory according to user requirements, design and manufacture of molds and in most cases, the products of injection production but also in other factory. In this way, the product design, mold design and manufacture and production of products in different places.
5. Professional division of labor, dynamic combination.
Mold production batch is small, generally belong to single production, but the mould need a lot of standard parts, large formwork, small to thimble, these can't also cannot do, only by a single manufacturer and manufacturing process is complex, common equipment and CNC equipment use very unequal.

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