Injection mold manufacturing characteristics and requirements

Plastic mold production of general machinery products in common, and also that its particularity. Compared with the general machinery manufacturing, mold manufacturing is generally difficult, especially precision molds. As a special technical equipment, tooling and production process are the characteristics of the following aspects.

1. Precision mold manufacturing, high quality requirements, not only requires high precision, but also processing the surface of good quality. In general, the working part of the mold manufacturing tolerances should be controlled within ± 0.011mm, and some even claim within the micron range, surface defects after mold processing requirements are very strict, and the surface roughness of the working part of Ra <0.8 um.

2. The complex shape of the working part of precision molds are generally two or three dimensional complex surface (especially the cavity mold), rather than the general machining of simple geometric profile.

3. The mold as a single piece, production of many varieties of each pair of mold can only produce a certain shape, size and accuracy parts. In the manufacturing process as much as possible the use of common tools, common measuring tools and instruments, as much as possible to reduce the number of special tools. In the manufacturing process of the step arrangement requires relatively concentrated, in order to ensure the quality and accuracy mold, simplify management and reduce the process cycle time.

4. The high hardness of the material is actually a plastic mold machining tool, its high hardness, are generally made of hardened alloy tool steel or carbide and other materials, if manufactured using conventional machining methods, tend to difficult, so mold processing method different from the general machining.

5. Due to the short production cycle and accelerate the upgrading of increasingly fierce market competition, requiring mold production cycles are getting shorter. Mold production management, design and technological work should meet this requirement, to improve the mold design, manufacturing and standardization, in order to shorten the manufacturing cycle.

6. When a complete set of production parts need more deputy mold, a mold before the manufactured products are mutually implicated restrict Yi blank mold, mold parts, and only eventually qualified parts, which was a series of mold considered qualified. In the production and scheduling of the mold must take full account of this characteristic.