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A cold runner structure with multi-cavity flow balance

A technology of flow balance and cold runner, which is applied in the field of cold runner structure, can solve the problem of non-uniform temperature distribution of molten plastic, and achieve the effect of symmetrical temperature distribution and quality assurance

Active Publication Date: 2016-05-04
SHENZHEN ZHAOWEI MACHINERY&ELECTRONICS CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the problems existing in the prior art, and propose a multi-cavity flow-balanced cold runner structure. The temperature distribution of molten plastic in each cavity is not uniform, which ensures the quality control of injection molding products

Method used

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  • A cold runner structure with multi-cavity flow balance
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  • A cold runner structure with multi-cavity flow balance

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Embodiment 1

[0024] The invention improves on the existing American "MeltFlipper" technology on the basis of the balanced runner structure, and provides a multi-cavity flow-balanced cold runner structure. Such as Figure 4 As shown, the cold runner structure includes a main channel 10, the inlet 101 of the main channel 10 is a glue inlet, the outlet 102 of the main channel communicates with four straight first sub-channels 20, and The four straight first-stage flow passages are arranged in a "cross" shape, and the four straight first-stage flow passages are on the same level, and the main channel 10 is connected to the four straight first-stage flow passages 20 vertical, the shape and length of the four straight first sub-flow channels are the same, and the outlet ends 21 (i.e. ends) of the adjacent two first sub-flow channels in the four straight first sub-flow channels are connected to The two ends 31 of an arc-shaped runner 30 are overlapped, and the overlapping positions on the two fi...

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Abstract

The invention relates to a novel multi-cavity flow-balance cold runner structure. The novel multi-cavity flow-balance cold runner structure comprises a main runner and branch runners communicated with the main runner, wherein the branch runners comprise multiple stages of branch runners, and the novel multi-cavity flow-balance cold runner structure is characterized in that the main runner is communicated with four first-stage branch runners which are positioned in the same plane and in two-two symmetrical arrangement, the main runner is vertical to the four first-stage branch runners, the tail ends of the two adjacent first-stage branch runners are in upper-and-down staggered lap joint with the two ends of an arc-shaped runner, the tail ends of the other pair of the first-stage branch runners are in lap joint with the two ends of the other arc-shaped runner, the central parts of the two arc-shaped runners are communicated with a straight runner, the straight runner and the arc-shaped runners are positioned in the same horizontal plane, and the straight runner is communicated with the next-stage branch runner through a bridge runner. The temperature and the viscosity of molten plastic in the runner disclosed by the invention are symmetrically distributed, and the quality of injection molded products of all mold cavities can be ensured.

Description

【Technical field】 [0001] The invention belongs to the mold design industry and relates to a multi-cavity flow-balanced cold runner structure of a mold. 【Background technique】 [0002] At present, the cold runner system of multi-cavity mold is widely used in injection molding production, but the mold with eight or more cavities has the disadvantages of unbalanced flow and large difference in part strength between cavities. The reason is that the molten plastic When flowing in the runner, its shear rate, temperature, and viscosity will change with the position of the molten plastic in the flow direction. The traditional runner structure is easy to cause unbalanced flow, the viscosity, temperature distribution, and pressure distribution of each cavity are different, and at the same time, the products of each cavity are also different. [0003] Such as figure 1 The one shown is the traditional cold runner structure, the plastic melt flows through the main channel 1 to the prim...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C45/27
CPCB29C45/322
Inventor 沈亚强陆志强李平
Owner SHENZHEN ZHAOWEI MACHINERY&ELECTRONICS CO LTD
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