Internal core-pulling mechanism for inclined hole of injection-molded plastic piece

Abstract

The invention provides an internal core-pulling mechanism for an inclined hole of an injection-molded plastic piece. The internal core-pulling mechanism comprises an upper mold plate and a lower mold plate; the upper template is connected with a cavity; a top plate and a mold foot are arranged on the lower mold plate; a mold core is arranged on the mold foot; the mold core and the cavity form a mold cavity; a molded plastic piece is arranged in the mold cavity; a straight top rod is arranged on the top plate; the straight top rod passes through the mold core to contact the plastic piece; an internal pulling block is arranged in the mold core; the internal pulling block is matched with the inclined hole of the plastic piece; the internal core-pulling mechanism is characterized in that: an inclined sliding seat is arranged on the top plate; an inclined chute is made in the inclined sliding seat; a rolling pin is arranged in the inclined chute; an inclined top rod is arranged on the rolling pin; and the inclined top rod passes through the mold core and is connected with the internal pulling block. According to the technical scheme, the internal core-pulling mechanism for the inclinedhole of the injection-molded plastic piece is ingenious in idea and simple in structure, reduces the production cost without additionally applying power, and has no interference in a water path hole of the mold and no influence on the cooling effect of the mold; moreover, the internal core-pulling mechanism can be used for processing all the injection-molded plastic pieces with the inclined holesor inclined blind holes, and has wide applicability and remarkably active effect.

Description

technical field [0001] The invention relates to an inner core-pulling mechanism for an inclined hole (oblique blind hole) of an injection-molded plastic part, which belongs to the field of plastic moulds. Background technique [0002] Injection-molded plastic parts (such as plastic parts of household appliances) are all made with oblique holes (oblique blind holes). The core-pulling of oblique holes in the prior art generally uses oil cylinders or springs as power to drive the core insert (inner pumping block) to be directly drawn. The disadvantages of the core are: complex structure, troublesome installation of cylinders or springs, especially interference with the water hole of the mold, which affects the cooling effect of the mold. Contents of the invention [0003] The purpose of the present invention is to overcome the shortcomings of the existing technology, to provide a simple structure, easy to install, does not affect the waterway of the mold, and uses the power o...

AI Technical Summary

Problems solved by technology

[0002] Injection-molded plastic parts (such as plastic parts of household appliances) are all made with oblique holes (oblique blind holes). The core pulling of oblique holes in the prior art generally uses oil cylinders or springs as power to drive the core insert (inner drawing block) to directly pull the core. The disadvantages are: complex structure, troublesome installation of oil cylinders or springs, especially interference with the mold water hole, affecting the cooling effect of the mould.

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