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Contracting internal core withdrawing device used for plastic mould and its use method

A plastic mold and inner core-pulling technology, which is applied in the field of plastic molds, can solve problems such as laborious, time-consuming, and unable to meet the requirements of mass production, and achieve the effect of simple structure, ingenious conception, and easy promotion and application

Inactive Publication Date: 2008-07-09
TIANJIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is time-consuming and laborious, and cannot meet the requirements of mass production

Method used

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  • Contracting internal core withdrawing device used for plastic mould and its use method
  • Contracting internal core withdrawing device used for plastic mould and its use method
  • Contracting internal core withdrawing device used for plastic mould and its use method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0019] Embodiment: a kind of core-pulling device in the shrinkage that is used for plastic mold (see Figure 1-5 ), is characterized in that it is composed of core 1, main slider 2, auxiliary slider 3, core fixed plate 4, inclined push rod 5, push rod fixed plate 7, push plate 8, movable mold seat plate 9 and inclined The push rod 5 is composed of the fixing parts of the core 1 and the push rod fixing plate 7. The said main slider 2 and the auxiliary slider 3 are evenly spaced according to six equal parts of the circle. The six oblique push rods 5 connected by the slider 2 and the auxiliary slider 3, the back of the main slider is a plane, the angle between the two sides of the auxiliary slider is 60°, and the back of the main slider is closely matched with the sides of the auxiliary slider; The main and auxiliary sliders are guided by the guide chute, the inclination angle of the back of the main slider is α, the inclination angle of the back of the auxiliary slider is β, and...

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Abstract

A contractible core unit for plastic mould is composed of moulding core and its fixing plate, primary and secondary slide blocks arranged along circumference at intervals, oblique push rods and its fixing plate, push plate, movable mould seat, and fixing part. When the mould is used for injection moulding, the inner surface of moulding cavity is smooth. After said injection moulding, the primary and secondary slide blocks are contracted inward under the action of push mechanism, so the bottle neck-shaped plastic product can be easily taken out of the mould.

Description

(1) Technical field: [0001] The invention belongs to the field of plastic moulds, in particular to a shrinkage inner core-pulling device for plastic moulds, and an application method thereof. (two) background technology: [0002] Plastic injection molds are tools for producing plastic products and are widely used. In the injection molding of plastic products, due to the inner concave of some plastic products, such as figure 1 As shown, the plastic part cannot be removed from the mold core after molding. The way to solve at present is to adopt movable core, after plastics molding, movable core is taken out from mold together with plastics, and then finds ways to take out core. This method is time-consuming and laborious, and cannot meet the requirements of mass production. (3) Contents of the invention: [0003] The object of the present invention is to design a shrinkage inner core-pulling device for plastic molds and its use method, which can solve the above troubles, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C45/33B29C45/40
Inventor 毕大森
Owner TIANJIN UNIVERSITY OF TECHNOLOGY
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