Injection mould core for refrigerator fan frame

Abstract

The invention discloses an injection mould core for a refrigerator fan frame, and belongs to the field of injection moulds. The injection mould core comprises three needle point pouring gates, namely a needle point pouring gate 1, a needle point pouring gate 2 and a needle point pouring gate 3, wherein the needle point pouring gates have two diameter sizes; the needle point pouring gate 1 has a relatively large diameter size and is independently positioned on one side of the mould core; the diameter sizes of the needle point pouring gate 2 and the needle point pouring gate 3 are the same and are smaller than that of the needle point pouring gate 1; the needle point pouring gate 2 and the needle point pouring gate 3 are distributed on the other side of the mould core. The injection mould core has the advantages as follows: according to CAE (computer aided engineering) simulation, the three needle point pouring gates with different diameter sizes are optimally designed, and according to the maximum flow length / wall thickness, a specific pouring position is determined so as to transfer a welding mark during injection moulding production of the refrigerator fan frame from an original weak position to a relatively strong end surface, so that the development cost of the mould is greatly reduced, the product quality is improved and thus the service life of a refrigerator cooling fan is prolonged.

Description

technical field [0001] The invention relates to the technical field of injection molds, in particular to an injection mold core for a refrigerator fan outer frame. [0002] Background technique [0003] Refrigerator cooling fans generally include fan blades, fan frame brackets, and electromagnetic components. Fan frame brackets are used as supports for fixing fan blades and electromagnetic components, and have a great impact on the service life of cooling fans. [0004] Refrigerator cooling fans are generally placed in the refrigerator or in the compressor room, so the structural performance requirements are very strict. The fan frame of the commonly used refrigerator cooling fan is an injection molded part. During the production process, the injection molding machine or / and auxiliary machines do not When it is stable, the injection pressure / holding pressure or material temperature is sometimes low, and the front edge of the weld line is difficult to fuse. Such a weld line ...

AI Technical Summary

Problems solved by technology

[0004] Refrigerator cooling fans are generally placed in the refrigerator or in the compressor room, so the structural performance requirements are very strict. The fan frame of the commonly used refrigerator cooling fan is an injection molded part. During the production process, the injection molding machine or / and auxiliary machines do not When it is stable, the injection pressure / holding pressure or the material temperature is sometimes low, and it is difficult to fuse the front edge of the weld line. Such weld lines are easy to break when they are produced in a thin frame with a small cross-sectional area and are subjected to external forces.

Existing fan frame injection gates are generally designed to the same standard, so the problem of welding marks at weak points cannot be avoided

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