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Die for special-shaped surface EPP (Expanded Polypropylene) forming

A special shape and mold technology, applied in the field of EPP molding, can solve the problems affecting the appearance and strength of EPP molding, and achieve the effect of low cost and reduced production cost

Inactive Publication Date: 2021-05-25
SUZHOU ZEHAN AUTOMOTIVE PARTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is how to solve the problems affecting the appearance and strength of the EPP molding of automobile products, while saving labor and materials

Method used

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  • Die for special-shaped surface EPP (Expanded Polypropylene) forming
  • Die for special-shaped surface EPP (Expanded Polypropylene) forming
  • Die for special-shaped surface EPP (Expanded Polypropylene) forming

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Embodiment Construction

[0028] The following describes the preferred embodiments of the present invention with reference to the accompanying drawings to make the technical content clearer and easier to understand. The present invention can be embodied in many different forms of embodiments, and the protection scope of the present invention is not limited to the embodiments mentioned herein.

[0029] In the drawings, components with the same structure are denoted by the same numerals, and components with similar structures or functions are denoted by similar numerals. The size and thickness of each component shown in the drawings are shown arbitrarily, and the present invention does not limit the size and thickness of each component. In order to make the illustration clearer, the thickness of parts is appropriately exaggerated in some places in the drawings.

[0030] The disclosure improves the feeding device used in the EPP molding process, and solves the problem that the appearance and strength of ...

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Abstract

The invention discloses a die for special-shaped surface EPP forming, which comprises a fixed die fixedly mounted on a forming machine, a movable die moving relative to the fixed die, and a material gun connected to a feeding system of the forming machine, wherein the fixed die comprises a fixed die plate and a convex die arranged on the fixed die plate; the movable die comprises a movable die plate and a concave die cavity formed in the movable die plate, the convex die and the concave die cavity are matched with each other to form a cavity to contain EPP particles; the material gun is detachably connected to the concave die cavity through a feeding hole of the concave die cavity, the material gun comprises an inclined end surface discharge hole; the inclination angle of the inclined end surface discharge hole is configured to be consistent with the inclination angle of the concave die cavity at the feeding hole. The die solves the problem that the appearance and the strength of a product are influenced by arranging a material gun at a position with a larger cambered surface radian or a larger inclined surface inclination of the product.

Description

technical field [0001] The invention relates to the technical field of EPP molding, in particular to a mold for EPP molding with special-shaped surfaces. Background technique [0002] Expanded polypropylene (EPP) has good thermal stability, excellent shock resistance and energy absorption, high recovery rate after deformation, oil resistance and heat insulation, and high tensile strength and impact strength. Most importantly, EPP can greatly reduce the weight of finished products and is widely used in automotive products. It is often used in automobile bumpers, automobile side shockproof cores, automobile door shockproof cores, tool boxes, trunks, armrests, bottom pads, sun visors, instrument panels, etc. . [0003] At present, the automobile industry mostly adopts the hot steam physical foaming process to foam EPP, and the usual mold design only considers the foamed flat plate. The traditional hot steam physical foaming uses the material gun to inject the pre-expanded EPP...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C44/58B29C44/38B29C44/34B29C33/04B29C33/44B29L31/30
CPCB29C33/04B29C33/44B29C44/3415B29C44/38B29C44/58B29L2031/30
Inventor 郭恒兵
Owner SUZHOU ZEHAN AUTOMOTIVE PARTS
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