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A kind of sandwich structure composite material forming method

A composite material and molding method technology, which is applied in the field of composite materials to achieve the effects of high degassing efficiency, low consumption of consumables and simple process

Active Publication Date: 2017-10-27
NO 53 RES INST OF CHINA NORTH IND GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] There is no report at home and abroad on the process of laying a diversion system on the upper side of the sandwich structure composite material prefabricated part and laying a semi-permeable membrane on the lower side to realize the manufacturing process of the sandwich structure composite material

Method used

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  • A kind of sandwich structure composite material forming method
  • A kind of sandwich structure composite material forming method
  • A kind of sandwich structure composite material forming method

Examples

Experimental program
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Effect test

Embodiment 1

[0022] The molding process involved in the invention is described in detail by taking a composite plate with a sandwich structure with a panel thickness of 5 mm, a ceramic sandwich layer thickness of 15 mm, a back plate thickness of 20 mm, and an in-plane effective size of 980 mm×580 mm as an example.

[0023] The glass fiber fabric EWR600 plain weave fabric of 1000mm×600mm is used as the back plate blank 5 and the panel blank 7, and the single layer density of the glass fiber fabric is 600g / m 2 , 12 layers of panel blanks are aligned and stacked, and 46 layers of back panel blanks are aligned and stacked. A layer of closely packed hexagonal alumina ceramics with a side length of 11 mm and a thickness of 15 mm is used as the sandwich layer 6 .

[0024] One layer of 20-mesh polyethylene braided mesh with a monofilament diameter of 0.4mm and a size of 930mm×560mm is used as the diversion medium 4; the semi-permeable membrane 2 has an area density of 105g / m 2 The epoxy type Dahlt...

Embodiment 2

[0033] The molding process involved in the invention is described in detail by taking a foam sandwich composite plate with a panel thickness of 15 mm, a foam sandwich layer thickness of 20 mm, a back plate thickness of 30 mm, and an in-plane effective size of 980 mm×680 mm as an example.

[0034] Use 1000mm×720mm glass fiber fabric EWR600 plain weave fiber fabric as back plate blank 5 and panel blank 7, and the density of a single layer of glass fiber fabric is 600g / m 2 , 69 layers of back sheet blanks are neatly stacked, and 35 layers of panel blanks are neatly stacked, and a 1000mm×720mm×20mm polyurethane foam flat plate with through holes is used as the sandwich layer 6 .

[0035] Two layers of 20-mesh polyethylene woven mesh with a monofilament diameter of 0.4mm and sizes of 950mm×700mm and 950mm×680mm are used as the diversion medium 4, and the semi-permeable membrane 2 has a surface density of 105g / m 2 Epoxy Dahltexx, the maximum outer dimension is 1040mm×800mm, the size...

Embodiment 3

[0044] Taking a balsa sandwich composite plate with a panel thickness of 6mm, a balsa sandwich layer thickness of 20mm, a backboard thickness of 10mm, and an in-plane effective size of 1450mm×700mm as an example, the molding process involved in the invention is described in detail.

[0045] The plain weave carbon fiber fabric of 1500mm×720mm is used as the back plate blank 5 and the panel blank 7, and the single layer density of the carbon fiber fabric is 400g / m 2 , 35 layers of back panel blanks are neatly stacked, and 21 layers of panel blanks are neatly stacked, and the double layers of rectangular Balsa balsa wood blocks of 40mm×20mm×10mm are neatly and closely arranged as the sandwich layer 6 .

[0046] One layer of 20-mesh polyethylene woven mesh with a monofilament diameter of 0.4mm and a size of 1450mm×700mm is used as the diversion medium 4; the semi-permeable membrane 2 has an area density of 105g / m 2 Epoxy Dahltexx, the maximum outer dimension is 1550mm×780mm, the s...

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Abstract

The invention belongs to the technical field of composite materials. A vacuum auxiliary resin filling process is adopted and a semipermeable membrane is utilized to exhaust air and volatile matter in a prefabricated member. The invention relates to a sandwiched composite material forming method. The method adopts the vacuum auxiliary filling process for forming and comprises the steps of laying a blanking and guiding system, injecting resin, and solidifying for forming. The forming method is characterized in that the blanking and guiding system is provided with a degassing region 1 and a semipermeable membrane, wherein the semipermeable membrane is arranged at the bottom of a panel blank 7 and completely and partially covers the end surface of an exhaust end of a blank, and the degassing region 1 and the semipermeable membrane are partially overlapped. The forming process has the advantages of low material consumption, high degassing efficiency and simple procedures, and can effectively ensure the quality of the sandwiched composite material. The forming method is suitable for preparing a material adopting a fiber fabric as a reinforcing material of a surface plate and a back plate and adopting a rigid material which does not absorb glue as a sandwiched material, and is particularly suitable for preparing small material blocks with sandwiched materials such as ceramics, cork wood and closed-cell foams or a material with holes in the whole plane.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and relates to composite material molding technology, in particular to a sandwich structure composite material member molding technology. Background technique [0002] Fiber-reinforced resin-based sandwich structure composites are usually processed by hand lay-up, molding, autoclave molding or vacuum-assisted resin infusion. Among them, the vacuum-assisted resin infusion process uses vacuum negative pressure to impregnate the resin in the fiber and its fabric, and solidifies and molds under vacuum pressure. It has the characteristics of simple molding equipment, low manufacturing cost, and low void ratio of the product. This process is solvent-free. Release, a green manufacturing process, has been widely used in various fields of national defense and national economy. [0003] At present, there are two methods for preparing sandwich structure composite materials by RTM or VARI proces...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C70/36
CPCB29C70/36
Inventor 郑威孔令美高泉喜薛亚娟王宝春袁秀梅齐燕燕王小兵王炤亮
Owner NO 53 RES INST OF CHINA NORTH IND GRP
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