Mould positioning structure

Abstract

The invention relates to a mould positioning structure which comprises an upper mould unit and a lower mould unit, wherein the lower mould unit comprises a lower mould base and a lower mould core; the upper mould unit comprises an upper mould base and an upper mould core; the lower mould base and the upper mould base are jointed; the lower mould core and the upper mould core are respectively provided with a molding cavity; the lower mould unit and the upper mould unit are provided with pouring channels which are communicated with the molding cavities; the lower mould unit and the upper mould unit also comprise a lower mould core sleeve barrel and an upper mould core sleeve barrel respectively; the lower mould core sleeve barrel and the upper mould core sleeve barrel are respectively provided with a mould cavity which extends along the axial direction so as to respectively accommodate the lower mould core and the upper mould core; the lower mould core sleeve barrel is provided with a combining groove, the upper mould core barrel is provided with a combining protrusion, and the shape of the combining protrusion is matched with the shape of the combining groove; the combining protrusion aligns to and is combined in the combining groove; the lower mould base and the upper mould base are respectively provided with an installation hole; and the lower mould core sleeve barrel and the upper mould core sleeve barrel are detachably arranged in the installation holes of the lower mould base and the upper mould base respectively.

Description

technical field [0001] The invention relates to a mold structure, in particular to a positioning structure of an injection mold. Background technique [0002] At present, in electronics, automobiles, motors, electrical appliances, instruments, home appliances and communication products, 70%-90% of parts need to be molded and manufactured, and molds have become important equipment for industrial production. [0003] like Figure 7 As shown, it is a traditional injection molding mold positioning structure 7 , and the mold positioning structure 7 includes an upper mold unit 71 and a lower mold unit 72 corresponding to the upper mold unit 71 . The upper mold unit 71 includes an upper mold base 711, two upper mold cores 712 (only one of which is shown in the figure) and an upper fixing seat 713, and the upper mold base 711 is provided with two positioning holes 715 and two Upper mold cavity 714, the two upper mold cores 712 are respectively installed in the two upper mold caviti...

AI Technical Summary

Problems solved by technology

[0004] However, although the structure of the positioning pin 725 and the positioning hole 715 can position the upper mold core 712 and the lower mold core 722, each positioning pin 725 and the positioning hole 715 still have a certain degree of misalignment, which is about 0.01mm. Moreover, the misalignment degree and misalignment direction of different positioning pins 725 and positioning holes 715 are different, thus resulting in a decline in product quality, especially in the aspheric optical lens mold positioning structure, the demand for misalignment must be below 0.005mm

In addition, in the above-mentioned mold positioning structure 7, when one of the mold cavities 714, 724 on the upper mold base 711 and the lower mold base 721 is damaged and a defective product occurs, the entire mold base needs to be removed for repair or replacement. As a result, the processing cost of the mold positioning structure is greatly increased

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