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Forming mold and forming method of negative drawing mold part

A molding method and technology of molding molds, which are applied in the field of molding molds for negative draft parts, can solve problems such as failure to meet design requirements, poor apparent quality of parts, and high porosity of parts, so as to reduce porosity and air bubbles and improve production Effect of low cost and improvement of internal quality

Inactive Publication Date: 2019-05-07
CH AUTO TECH CORP CO LTD
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Problems solved by technology

In the prior art, parts with negative draft can only be produced by low-pressure production methods, such as the sealing film pressure method. The parts produced by this method have higher porosity, more internal defects of the parts, and the apparent quality of the parts Not good enough to meet design requirements

Method used

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  • Forming mold and forming method of negative drawing mold part

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Embodiment Construction

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0025] see figure 1 , this embodiment discloses a forming mold for negative draft parts, which at least includes a first mold 1 and a second mold 3. When the first mold 1 and the second mold 3 are closed, a cavity 31 is enclosed, and the cavity 31 can be It is directly arranged in the second mold 3, the cavity 31 is connected with a sealing film 4, and the edge of the sealing film 4 is sealed with the inner wall of the cavity 31;

[0026] The sealing film divides the cavity into a first cavity 311 and a second cavity 312, a first cavity 311 is formed between the sealing film 4 and the inner wall of the cavity 31, and the second cavity 312 communicates with the air compressor 6 through ...

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Abstract

The invention discloses a forming mold and a forming method of a negative drawing mold part. The mold at least comprises a first mold and a second mold, the first mold and the second mold form a moldcavity in a defining manner, a seal film is connected into the mold cavity, the edge of the seal film is in sealed connection with the inner wall of the mold cavity, the seal film divides the mold cavity into a first cavity and a second cavity, a first cavity is formed between the seal film and the inner wall of the mold cavity, and the second cavity communicates with an air compressor through anair pipe. The invention further discloses a forming method of the negative drawing mold part. Through the mold and the method, the porosity of the negative drawing mold part can be effectively reduced, and the interior and appearance quality of the negative drawing mold part can be improved.

Description

technical field [0001] The invention relates to the technical field of auto parts processing, in particular to a forming mold and a forming method for negative draft parts. Background technique [0002] In the production process of composite parts, it is usually necessary to set a certain draft angle. The draft angle is also the draft angle, which is the slope designed on both sides of the die cavity for the convenience of mold release. The orientation of the draft angle It depends on the inner and outer dimensions of the plastic parts. The draft angle is divided into positive draft angle and negative draft angle. The composite parts in the existing automotive field need to be set with a certain negative draft angle due to modeling reasons. In the prior art, parts with negative draft angle can only be produced by low-pressure methods, such as sealing film pressing. It is also not good enough to meet the design requirements. SUMMARY OF THE INVENTION [0003] The technic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C33/00
Inventor 王克坚朱生五
Owner CH AUTO TECH CORP CO LTD
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