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A tension-compression process for special-shaped materials using pmi foam sandwich

A technology of profiled material and foam core, applied in the direction of coating, etc., to achieve good connection effect, enhance overall stability, and achieve the effect of designability

Active Publication Date: 2021-07-27
CASHEM ADVANCED MATERIALS HI TECH CO LTD ZHEJIANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Here, joints are avoided, but this method has the same disadvantages as the previous methods in terms of residual material, process speed and complexity

Method used

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  • A tension-compression process for special-shaped materials using pmi foam sandwich

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A kind of special-shaped bar tension-compression process that adopts PMI foam sandwich, is characterized in that, comprises the steps:

[0030] Step (1) impregnation, impregnation of multiple fibers or rovings with resin, the resin impregnation process can be realized in an impregnation tank;

[0031] Step (2) preforming, after the fiber material is impregnated with resin, it is preformed by using mold tooling;

[0032] Step (3) Curing molding, impregnating the fiber material with resin to realize the curing of the resin in the molding mold to form a covering material, and at the same time, the PMI foam core is fed synchronously and continuously to realize the coating and the final molding of the product; to ensure the uniform temperature inside the mold It is characterized in that the PMI foam core is sprayed with a kind of gallium thulium doped on the surface of the PMI foam core before feeding. surface treatment agent;

[0033] Step (4) cutting, at the end of the e...

Embodiment 2

[0046] A kind of special-shaped bar tension-compression process that adopts PMI foam sandwich, is characterized in that, comprises the steps:

[0047] Step (1) impregnation, impregnation of multiple fibers or rovings with resin, the resin impregnation process is realized by pressing in the forming tool;

[0048] Step (2) preforming, after the fiber material is impregnated with resin, it is preformed by using mold tooling;

[0049] Step (3) Curing molding, impregnating the fiber material with resin to realize the curing of the resin in the molding mold to form a covering material, and at the same time, the PMI foam core is fed synchronously and continuously to realize the coating and the final molding of the product; to ensure the uniform temperature inside the mold It is characterized in that the PMI foam core is sprayed with a kind of gallium thulium doped on the surface of the PMI foam core before feeding. surface treatment agent;

[0050] Step (4) cutting, at the end of t...

Embodiment 3

[0063] A kind of special-shaped bar tension-compression process that adopts PMI foam sandwich, is characterized in that, comprises the steps:

[0064] Step (1) impregnating, impregnating multiple fibers or rovings with resin, the resin impregnating process is realized in the impregnating tank;

[0065] Step (2) preforming, after the fiber material is impregnated with resin, it is preformed by using mold tooling;

[0066] Step (3) Curing molding, impregnating the fiber material with resin to realize the curing of the resin in the molding mold to form a covering material, and at the same time, the PMI foam core is fed synchronously and continuously to realize the coating and the final molding of the product; to ensure the uniform temperature inside the mold It is characterized in that the PMI foam core is sprayed with a kind of gallium thulium doped on the surface of the PMI foam core before feeding. surface treatment agent;

[0067] Step (4) cutting, at the end of the equipme...

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Abstract

The invention relates to the field of new material preparation, and discloses a special-shaped bar drawing and pressing process using PMI foam sandwich. The inventive method consists in producing a fiber-reinforced profile and simultaneously filling it with a PMI foam core. In one and the same method step, the PMI foam core has a very good connection effect with the fiber-reinforced profile. It effectively solves the problems existing in the prior art, and can achieve a very good connection effect between the foam core material and the skin material. No adhesive layer helps the product to reduce weight, and no joint helps the uniform hollow profile. Carrying capacity and enhance the overall stability; it can realize the use of materials that cannot withstand the high temperature of PMI foam foaming as the skin, which expands the choice of materials; it can achieve low cost, high efficiency, and continuous processing of workpieces on specific equipment. The density of the foam and the collocation of covering materials can be flexibly adjusted according to the needs, so as to realize the designability of the composite material.

Description

technical field [0001] The invention relates to the field of material preparation, in particular to a stretch-compression process for profiled materials using PMI foam sandwiches. Background technique [0002] Poly(meth)acrylimide (PMI) foam is a commonly used core material in composite products, and it often needs to be processed into various shaped materials. [0003] CN108219376A discloses a PMI foam elbow core material and a forming method thereof, belonging to the technical field of foam core material forming. The forming method of the PMI foam bent pipe core material is to cut a gap on both sides of the straight pipe PMI foam core material, and then use the gap to bend it into a desired angle, and then use a mixed paste composed of epoxy resin, curing agent and hollow glass microspheres. It is filled into the gap and made after curing. The invention has simple processing process and strong operability, and can be processed and formed without professional processing e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C70/42B29C70/68B29C70/54C09D5/00
CPCB29C70/42B29C70/545B29C70/68C09D5/00
Inventor 毛敏梁董艳丽李克迪范晓庆常艺李峰徐文生孟佳丽
Owner CASHEM ADVANCED MATERIALS HI TECH CO LTD ZHEJIANG
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