Secondary core pulling mechanism for injection molding die with honeycomb-shaped side face vertical plates

Abstract

A secondary core pulling mechanism for an injection molding die with honeycomb-shaped side face vertical plates comprises an upper compound plate and a lower compound plate. A cushion plate is arranged below the upper compound plate, and a cavity is formed below the cushion plate. The lower compound plate is provided with die feet. The part, between the die feet, of the lower compound plate is provided with an upper centre plate, a lower centre plate and a centre. Each die foot is provided with a core internally provided with a core insert, wherein the core is provided with a side core pulling sliding block internally provided with a side centre, a side centre plate is arranged on the outer side of the side core pulling sliding block, the side centre is connected with the side centre plate, a plastic piece is arranged among the core insert, the side core pulling sliding block, the side centre and the cavity, the vertical plates are manufactured on the two sides of the plastic piece, and honeycomb grooves are formed in the outer walls of the vertical plates. The secondary core pulling mechanism is characterized in that a centre bottom plate is arranged on the outer wall of each side centre plate and internally provided with a spring, wherein one side of the spring makes contact with the centre bottom plate, the other side of the spring penetrates the corresponding side centre plate to make contact with the corresponding side core pulling sliding block, a protruding block is manufactured on the outer wall of one side of the centre bottom plate, the outer wall of the protruding block makes contact with the inner wall of the cavity, an oblique guide column is arranged in the cavity, an oblique guiding hole is formed in the side core pulling sliding block, an oil cylinder is arranged on the outer wall of the core, and an oil cylinder piston rod is connected with the side core pulling sliding block.

Description

technical field [0001] The invention relates to an injection mold, in particular to a secondary core-pulling mechanism with a honeycomb-shaped side riser for the injection mold. Background technique [0002] In the injection mold, if the side wall of the plastic part is made of a vertical plate, and the outer wall of the vertical plate is densely covered with structures such as honeycomb grooves, round grooves, and square grooves, since more grooves will have a tightness on the side core-pulling slider. Larger, if the side core-pulling slider is used to pull the core directly from the side, it will cause the side core-pulling slider to drive the vertical plate to move together, so that the vertical plate and the main body of the plastic part will be broken, and the molding product will be scrapped. In order to overcome this Defects, in the prior art, an upwardly extending baffle is formed on the fixed plate of the side pumping cylinder, a side thimble plate is arranged on th...

AI Technical Summary

Problems solved by technology

[0002] In the injection mold, if the side wall of the plastic part is made of a vertical plate, and the outer wall of the vertical plate is densely covered with structures such as honeycomb grooves, round grooves, and square grooves, since more grooves will have a tightness on the side core-pulling slider. Larger, if the side core-pulling slider is used to pull the core directly from the side, it will cause the side core-pulling slider to drive the vertical plate to move together, so that the vertical plate and the main body of the plastic part will be broken, and the molding product will be scrapped. In order to overcome this Defects, in the prior art, an upwardly extending baffle is formed on the fixed plate of the side pumping cylinder, a side thimble plate is arranged on the rear side of the side core pulling slider, and a side thimble is arranged on the side thimble plate, and the side thimble passes through the side pumping The core slider cooperates with part of the honeycomb groove of the product. There is a certain gap between the side ejector plate and the side core-pulling slider. A spring is set between the side ejector plate and the baffle plate. The core-pulling slider moves outward, but the side thimble plate and the side thimble are kept still by the spring thimble, and the side thimble is held against the vertical plate of the plastic part to keep it still, so that the side core-pulling slider first breaks out of the honeycomb groove of the vertical plate. The disadvantages are: the distance between the side thimble plate and the baffle plate is relatively large, and the elasticity of the spring is not enough to support the thimble plate, which will easily lead to excessive injection pressure during injection molding, which will cause the side core-pulling slider to move to the outside and make the mold The cavity changes, and the mold is opened. When the side core-pulling slider moves outward, it will drive the ejector plate to move together, resulting in product scrapping, and the thickness of the side core-pulling slider needs to be increased to shorten the distance between the side ejector plate and the baffle. The distance between them will increase the length of the side thimble, weaken the strength of the side thimble, and easily deform or even break

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