Mold opening injection: how to make injection molded parts with processing accuracy.
Due to the high fluidity of plastics, it is difficult to produce injection molded parts in strict accordance with the drawings. Especially for some injection molded parts with high dimensional accuracy, the dimensional accuracy of the injection molded part refers to the degree of conformity between the obtained injection molded part size and the size in the product drawing, that is, the dimensional accuracy of the injection molded part is obtained. How can we manufacture products with high processing precision of injection molded parts?
Mold opening injection: how to make injection molded parts with processing accuracy.
There are many factors that affect the dimensional accuracy of plastic parts. The first is the precision of mold manufacturing and the degree of mold wear; the second is the fluctuation of plastic shrinkage and the change of molding process conditions.
The aging change of the mold opening injection plastic part after molding and the structure shape of the mold, etc. Therefore, in order to reduce the processing difficulty and manufacturing cost of the mold, the dimensional accuracy of the plastic parts should be designed as low as possible under the premise of meeting the requirements of the injection parts.
The dimensional tolerance of open-molded injection molded parts can be designed and processed in accordance with the numerical standard SJ1372-78 for plastic parts tolerance. According to the standard, the accuracy of plastic parts can be divided into eight accuracy levels, of which level 1 and level 2 belong to the technical level of fine injection processing and can only be used under special requirements. The standard only specifies the standard tolerance value, and the upper and lower deviation of the basic size can be allocated according to the matching performance of the plastic part.
In addition, for dimensions without tolerances, it is recommended to use the 8-level accuracy in the standard. Only by strictly following the tolerance value standard of injection molded parts can the dimensional accuracy and quality of injection molded parts be guaranteed.
In order to meet people’s pursuit of injection molding materials, the performance of products in various industries is constantly improving. Products are composed of accessories. This requires more and more fine products and accessories, so that products and accessories can reach the original design size to a large extent. The same is true for the injection molding industry. Fine injection molding has become a competitive field for all excellent injection molding companies.
Many products now fail to reach their original design life. There are many reasons for this. One of the reasons is that the product accessories cannot reach the original design size. A complete product consists of several or even tens of thousands of accessories, and the size does not meet the design requirements, causing problems during use. Even if the time is long, the accessories will be replaced.
Mold opening injection: What are the requirements to meet the requirements of fine injection molding?
1.Advanced injection molding machine equipment, which is the foundation of injection molding. If the foundation is not good, good products will never be produced.
2. the manufacturing of molds, the injection molding industry is inseparable from molds, molds with superior performance can add a lot of bonus points to fine injection molding.
3.injection molding operators, without a good injection engineer, no matter how good the equipment is, it is useless.
4.the purchase of raw materials, the same plastic, different processes lead to different plastic properties, injection molding processing.
Post time: Sep-16-2021