Injection mold for magnetic conduction ring assembly and manufacturing method thereof

Abstract

The invention discloses an injection mold for a magnetic conduction ring assembly, comprising a lower mold assembly (100), an upper mold assembly (200) and a positioning mechanism (300) provided on the lower mold assembly (100) , the lower mold assembly (100) includes a lower mold (101), a mandrel (102) provided on the lower mold (101), and a guide device (400) arranged on the mandrel (102), the upper The mold assembly (200) includes an upper mold (201) and an injection gate (202) arranged on the upper mold (201). The invention also discloses a manufacturing method for processing the magnetic conduction ring assembly through the above-mentioned injection mold, which has no holes for positioning, accurate positioning of the upper and lower magnetic conduction rings, simple processing technology, and good performance of the manufactured product.

Description

technical field [0001] The invention relates to a magnetic conducting ring assembly, in particular to an injection mold used for manufacturing the magnetic conducting ring assembly and a manufacturing method thereof. Background technique [0002] For electronic products, in order to protect the internal components, the injection molded products used as the shell are required to have a certain rigidity; especially for some product components, it is necessary to connect the various components through injection molding and have a certain rigidity. [0003] For the magnetic ring assembly in the non-contact hall type torque sensor, the existing manufacturing method of the magnetic ring assembly is also through injection molding, wherein the positioning method of the magnetic ring assembly is provided with a guide post on the lower mold assembly, and the The magnetic ring is provided with a positioning hole, and the magnetic ring is positioned through the cooperation of the positi...

AI Technical Summary

Problems solved by technology

[0004] (1) Since the teeth of the upper and lower magnetic conducting rings are relatively placed, the positioning of the magnetic conducting ring through the cooperation of the positioning hole and the guide post is only a positioning in the vertical direction between the upper and lower magnetic conducting rings, while the upper and lower magnetic conducting rings When the rings are placed relative to each other, the teeth are relatively occluded. This positioning method cannot guarantee the accuracy of the alignment of the teeth of the upper and lower magnetic rings, thus affecting the performance of the product.

[0005] (2) In order to realize the positioning between the upper and lower magnetic rings, a positioning hole is provided on the magnetic ring, which hinders the magnetic path on the magnetic ring, makes the magnetic field distribution uneven, and affects the effect of magnetic field induction; Moreover, at the positioning hole, the mechanical strength is also low, and the micro-deformation that will occur when the stress is applied here will cause the magnetic circuit to break, which will affect the effect of magnetic field induction, thereby reducing the consistency and reliability of the sensor, and greatly Reduces the accuracy of the signal delivered by the sensor

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