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Method and structure for eliminating thermal expansion gap of plastic die and device

A plastic mold, thermal expansion technology, applied in the field of mold processing, to solve the problem of burrs, eliminate burrs, and improve product quality

Pending Publication Date: 2019-12-13
ZHUHAI GREE PRECISION MOLD CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the deficiencies of the prior art, the present invention solves the gap problem caused by the difference in the thermal expansion of the fixed mold insert and the movable mold insert in the production of plastic molds, resulting in gaps at the steps and corners of the parting, so as to achieve the effect of eliminating burrs on injection molded products

Method used

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  • Method and structure for eliminating thermal expansion gap of plastic die and device
  • Method and structure for eliminating thermal expansion gap of plastic die and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: A method for eliminating thermal expansion gaps of plastic molds.

[0021] A method for eliminating the thermal expansion gap of a plastic mold is to add a flexible sliding mechanism between the fixed mold insert 7 and the movable mold insert 6, the flexible sliding mechanism is connected and installed with the fixed mold insert 7, and the fixed mold insert When the part 7 is heated and expanded or cooled and contracted, the flexible sliding mechanism slides on the movable mold insert along with the fixed mold insert 7 to eliminate the gap generated between the fixed mold insert 7 and the movable mold insert 6. The insert 7 becomes longer due to heat expansion due to high temperature heating, and the flexible sliding mechanism slides for a short distance on the movable mold insert 6 with the expansion of the fixed mold insert 7. When the fixed mold insert 7 cools and shrinks, the flexible sliding mechanism As the fixed die insert 7 shrinks, a short-distanc...

Embodiment 2

[0023] Embodiment 2: A structure for eliminating thermal expansion gaps of plastic molds.

[0024] A structure for eliminating thermal expansion gaps of plastic molds, including a fixed mold insert 7, a movable mold insert 6 and a flexible sliding mechanism, the flexible sliding mechanism includes a slider 1, a first pressing block 3, a second pressing block 4, a second pressing block Three pressure blocks 5 and locking blocks 2, the locking block 2 is fixed on the fixed mold insert 7, the slider 1 is connected and installed with the fixed mold insert 7 through the locking block 2, that is, an adaptive slider The surface of 1 and the corresponding position of the fixed mold insert 7 are all equipped with a groove body that is connected and fixed with the locking block 2, and the first pressing block 3, the second pressing block 4 and the third pressing block 5 are respectively arranged on the moving mold insert On the three sides of 6, the slider 1 is installed and connected w...

Embodiment 3

[0027] Embodiment 3: A structure for eliminating thermal expansion gaps of plastic molds.

[0028]The difference from Embodiment 1 is that the locking block 2 is changed to a spring, and the spring is arranged against the bottom of the slider 1 and the fixed mold insert 7, so that when the fixed mold insert 7 thermally expands or cools down, the slider 1 is driven to move on the movable mold insert. Move on piece 6. Through the replacement of the locking block 2 by the spring, one is to consider that the installation of the locking block 2 is not as simple as the spring, and the second is that the elastic properties of the spring can allow a certain deviation in the working process, and the deviation does not affect the production quality. , the use of springs to produce deviations can protect the fixed mold insert 7 and the movable mold insert 6 to a certain extent, prolonging the service life.

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Abstract

The invention provides a method and a structure for eliminating a thermal expansion gap of a plastic die and a device. A flexible sliding mechanism is additionally arranged between a fixed die insertand a movable die insert; the flexible sliding mechanism and the fixed die insert are mounted in a connecting manner; and when the fixed die insert is subjected to thermal expansion or cooling shrinkage, the flexible sliding mechanism slides along with the fixed die insert, so that a gap between the fixed die insert and the movable die insert is eliminated. The flexible sliding mechanism is mounted on the fixed die insert and moves along with the fixed die insert, the flexible sliding mechanism is in tight fit with the fixed die insert, meanwhile, when the flexible sliding mechanism moves thefixed die insert, the flexible sliding mechanism moves on the movable die insert, the flexible sliding mechanism moves on the fixed die insert and the movable die insert synchronously, no gap betweenthe fixed die insert and the movable die insert is ensured, and excessive glue and burrs are not generated in the injection molding process; and the method, the structure and the device solves the problem that in the plastic die production, the thermal expansion of the fixed die insert is different from that of the movable die insert, so that a gap is generated at a parted step and a parted corner, thereby achieving the effect of eliminating burrs of an injection product.

Description

technical field [0001] The invention relates to the technical field of mold processing, in particular to a method, structure and equipment for eliminating thermal expansion gaps of plastic molds. Background technique [0002] At present, in order to achieve the high-gloss effect without flow marks on the surface of air-conditioning plastic panels, the steam-free flow-mark technology is often used to develop molds, and the fixed mold inserts of the mold adopt the high-gloss steam no-flow mark molding technology. This technology is to heat the fixed mold of the mold through high-temperature steam during injection molding, and cool the fixed mold of the mold through cold water. Each molding cycle needs to be heated and cooled once, and the cycles are alternated, so that the appearance of the molded product has no weld line and high gloss. . Because the fixed mold of the mold is heated by high-temperature steam, the temperature of the fixed mold insert rises from normal tempera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C45/26
CPCB29C45/2608
Inventor 王程鹏施天赐蔡国旗黄国军张新平周艳文
Owner ZHUHAI GREE PRECISION MOLD CO LTD