Manufacture of injection molding shell is a very complicated process, from the initial design, processing, assembling and debugging steps, in the end really be put into use, in the whole life cycle of every working procedure must consider the impact of the quality of injection molding shell, every detail is to reach the designated position, so as to improve the quality of the final injection molding shell. Let's take a look at how to ensure the quality of the injection shell.
(1) high machining accuracy is required
An injection molding case is generally composed of a die, punch and die holder, and some may be a multi-piece assembly module. Therefore, the combination of upper and lower die, the combination of insert block and mold cavity, and the combination between modules all require high machining accuracy. Precision injection casings often have dimensional accuracy up to m.
(2) complex shape
Some products such as car covers, aircraft parts, toys, household appliances, the shape of the surface is composed of a variety of curved surface combination, therefore, injection shell cavity surface is very complex. Some surfaces must be dealt with mathematically.
(3) the small batch
Injection moulded casings are not mass produced and in many cases are produced in one lot.
(4) process
In the process of injection molding shell, milling, boring, drilling, reaming, tapping and other processes are always used.
(5) repeated production
The injection molded case has a life span. When an injection shell is used beyond its lifetime, a new injection shell must be replaced, so the production of the injection shell is often repetitive.
(6) profiling
Sometimes there is no pattern or data in the production of injection moulding casings, and copying processing should be carried out according to the real objects. This requires high imitation accuracy, no deformation.
(7) excellent injection molding shell material with high hardness
The main materials of the injection shell are mostly made of high quality alloy steel, especially the injection shell with high service life, which is often made of Crl2, CrWMn and other lettenite steel. This kind of steel from blank forging, processing to heat treatment have strict requirements. Therefore, the preparation of processing technology can not be ignored, heat treatment deformation is also the problem to be seriously treated in processing.
