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In-mold punching mechanism and injection molding mold

An injection molding and moving template technology, applied in the field of injection molding molds and in-mold punching mechanisms, can solve the problems of increased processes, high mold development costs, inaccurate tool positioning, etc., to reduce mechanism development costs, facilitate design and implementation, The effect of simplifying the institutional structure

Active Publication Date: 2019-03-29
GREAT WALL MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The production method of injection molding first and then punching has many problems such as frequent product circulation, inaccurate tooling positioning, long processing time, and defective products are prone to be produced during the circulation and punching process.
For the process of setting structural holes to form structural holes during injection molding, because the holes hinder the flow of plastic, weld lines will be generated on the sides of the holes, which will affect the appearance and strength of the product, so it is necessary to spray paint on the product to Cover the weld line, which will increase the process, and it is easy to produce defects such as bubbles during painting and baking
On the other hand, for the processing method of setting structural holes, two sets of molds need to be developed for products with holes and without holes, which will also result in higher mold development costs

Method used

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  • In-mold punching mechanism and injection molding mold
  • In-mold punching mechanism and injection molding mold
  • In-mold punching mechanism and injection molding mold

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The invention relates to an in-mold punching mechanism, which is accommodated in a fixed plate or a movable plate that can be fastened together for injection molding of parts. The hole punching knife for punching the parts, and the ejector rod that is movable in the hole punching knife, also includes the transmission connection with the hole punching knife and the ejector rod, so as to drive the hole punching knife and the ejector rod to have Synchronized relative motion of drive components.

[0033] The in-mold punching mechanism of the present invention, by setting it in the movable template or the fixed template, and corresponding to the opening position on the workpiece, can punch on the workpiece during the injection molding process of the workpiece. If the hole is formed, the drive assembly can be used to drive the hole punching knife to punch the hole when the injection molding of the part is completed and the shape is not cooled. The synchronous relative moveme...

Embodiment 2

[0043] This embodiment relates to an injection molding mold, which includes a fixed template and a movable template that can be interlocked for injection molding of parts, on the movable template or the fixed template or on both the movable template and the fixed template An in-mold punching mechanism as described in Embodiment 1 is provided. By setting the in-mold punching mechanism, the workpiece can be punched when the injection molding of the workpiece is completed and the mold is not cooled and shaped, which can avoid the trouble of punching after the injection molding is completed. At the same time, the setting of the punching mechanism in the mold does not need to set the structural hole positions in the mold cavity, so as to avoid the problem of welding lines due to the setting of the structural hole positions.

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PUM

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Abstract

The invention provides an intra-mold punching mechanism. The intra-mold punching mechanism is contained in either a fixed die plate or a movable die plate, wherein the fixed die plate and the movable die plate can be buckled together to be used for achieving injection molding of a workpiece. The intra-mold punching mechanism comprises a hole-forming punching tool and an ejection rod, wherein the hole-forming punching tool can slide in the movable die plate or the fixed die plate and conducts punching on the workpiece in the molding process, and the ejection rod is movably arranged in the hole-forming punching tool in a penetrating manner. The intra-mold punching mechanism further comprises a driving assembly, wherein the driving assembly is in transmission connection with the hole-forming punching tool and the ejection rod so that the hole-forming punching tool and the ejection rod can be driven to perform synchronous relative motion. The invention further provides an injection molding mold provided with the intra-mold punching mechanism. By means of the intra-mold punching mechanism, defects of the existing mode that injection molding is conducted before punching or injection molding is conducted by arranging positions of structural holes can be avoided.

Description

technical field [0001] The invention relates to the technical field of dies, in particular to an in-mold punching mechanism. The invention also relates to an injection mold equipped with the punching mechanism in the mold. Background technique [0002] At present, for injection-molded parts with structural holes, such as front and rear bumpers with radar holes, the structural holes on them are formed by injection molding and then punching, or by setting structural hole positions during injection molding. The production method of injection molding first and then punching has problems such as many product circulation times, inaccurate tooling positioning, long processing time, and defective products are prone to be produced during the circulation and punching process. For the process of setting structural holes to form structural holes during injection molding, because the holes hinder the flow of plastic, weld lines will be generated on the sides of the holes, which will aff...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C45/26
Inventor 谢寿琴柳星来梁雪娇李亚超
Owner GREAT WALL MOTOR CO LTD
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