Encapsulated injected gear, injection process and mold

Abstract

The invention belongs to the technical field of high-performance material small gears, and provides an encapsulated injected gear. The encapsulated injected gear comprises a gear shaft, a gear inner core arranged on the gear shaft, and a gear body encapsulated and injected on the gear inner core. According to the encapsulated injected gear, a metal inner core is used for replacing an original injection molding material, and firstly, the coaxiality of the shaft and the gear can be guaranteed well, the thickness of the injection molding material is reduced to a large degree, and the problem of contraction and deformation generated in the conventional injection molding process is solved; and secondly, the metal is higher in strength and economical in cost, and compared with expensive high-performance injection molding materials, it is a good choice to replace the gear inner core with the metal.

Description

technical field [0001] The invention relates to the technical field of small gears made of high-performance materials, in particular to a rubber-covered injection molding gear, an injection molding process and a mould. Background technique [0002] Gears are toothed mechanical parts that can mesh with each other, and they are widely used in mechanical transmission and the entire mechanical field. Products are used in various industries such as micro motors, electronic products, auto parts, household appliances, office supplies, toys, and handicrafts. Among the parts that need transmission, the precision of the gear is often very high, because the design is unreasonable, the gear parameters are not suitable, the transmission effect is not good, the noise is large, the tooth strength is low and easy to wear and other problems. [0003] Existing technology: Two injection moldings are adopted, which are sample mold and standard mold respectively, and after two injection molding...

AI Technical Summary

Problems solved by technology

[0004] The main component of the plastic gear in the prior art is resin material, the shrinkage rate is relatively high, and the precision of the conventional one-time injection molding product is low, which cannot meet the use requirements; Temperature will also affect the position accuracy of the gear shaft, resulting in a deviation in the concentricity of the formed gear shaft and the gear; therefore, it is necessary to design a rubber-coated injection molding gear, injection molding process and mold to solve the above technical problems

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