Mould and molded product thereof

Abstract

The invention discloses a mould, comprising a female mould, a male mould and a male mould insert, which are respectively of preset shapes. On a breaking surface for mould assembly of the female mould and the male mould insert, the lower part of the female mould and the upper part of the male mould insert are respectively provided with a protruding rib. After the female mould, the male mould and the male mould insert are assembled, a mould cavity matching with a molded product in shape is formed, and a molded product with a preset shape can be molded by injection molding in the mould cavity. The invention further provides a molded product produced with the mould through molding injection, the molded product comprises a shaft hole, and the peripheries of orifices on two ends of the shaft hole are respectively provided with a space avoiding position corresponding to the protruding rib positions on the mould. In the molded product manufactured with the mould provided by the invention, the influence of burrs on orifices to the aperture of the shaft hole is effectively eliminated to ensure stable production, and extra manpower and maintenance cost loss are avoided.

Description

technical field [0001] The invention relates to a mold, in particular to a mold capable of eliminating burr interference and its molded product. Background technique [0002] In the mold manufacturing industry, when the mold is formed, it is easy to cause burrs on the formed product due to the poor fit of the male and female mold insertion surfaces and production loss. [0003] see figure 1 , is a three-dimensional view of a molded product. The molded product 20' has a shaft hole 201' matched with the shaft 30', and the product specification requires that the shaft 30 can rotate in the shaft hole 201' and has good rotatability. [0004] see figure 2 , is the cross-sectional view of the mold used to manufacture the molded product 20'. The mold 10' comprises a female mold 101', a male mold 102' and a male mold inlet 103', and the female mold 101', the male mold 102' and the male mold inlet 103' have predetermined shapes respectively, so that the three are molded together ...

AI Technical Summary

Problems solved by technology

However, during injection molding, the orifice of the shaft hole 201' of the molded product 20' is directly inserted into the male die 103' and the female die 101', as image 3 As shown, the burr 21' is easily produced at the opening of the shaft hole 201', thereby affecting the aperture of the shaft hole 201', resulting in poor assembly or poor rotation of the rotating shaft 30'

In production, the burr 21' can only be removed by adding processes, and frequent mold repairs are required, which not only wastes manpower, increases costs, but also causes instability in production

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