Gas auxiliary injection molding process for household electrical appliance casing

An injection molding process, gas-assisted technology, applied in the direction of household components, household appliances, other household appliances, etc., can solve the problems of many ribs and columns, complex shapes, deformation, etc., to achieve no warping deformation, no sink marks , The effect of reducing injection pressure and clamping force
CN101077612AInactive Publication Date: 2007-11-28TAICANG QIUJING PLASTIC MOLD
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
TAICANG QIUJING PLASTIC MOLD
Publication Date
2007-11-28
Estimated Expiration
Not applicable Β· inactive patent
Patent Text Reader

Abstract

The present invention relates to one kind of improved gas aided injection molding process for producing casing for electric appliance. The process includes the first injecting plastic melt in the amount of 95-97 % of the casing weight into the mold cavity and the subsequent injecting high pressure nitrogen through the preset gas channel, which is set in the place near the interjunction between the front side and the lateral side of the casing. Compared with available technology, the present invention has the advantages of raised casing forming efficiency, lowered cost and good appearance of the product.
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Description

technical field

[0001] The invention relates to a gas-assisted injection molding process, in particular to a gas-assisted injection molding process for an outer casing of a household appliance, and belongs to the technical field of injection molding. Background technique

[0002] The usual injection molding process of home appliance casing is to inject molten plastic into the mold cavity, form the required home appliance casing parts after cooling, and open the mold to take out the parts after reaching the ejection temperature. Due to the high requirements on the appearance of the shell of the home appliance, the shape is very complex, and there are many ribs and columns. When the conventional injection molding technology is used for production, serious shrinkage will occur in the area of ​​the ribs and columns due to the uneven wall thickness. If the plane is large, warping and deformation will also occur.

[0003] In the second half of the 20th c...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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