Large composite material skinned die and manufacturing method thereof

A composite material and skin technology, which is applied in the field of large-scale skin molds and their manufacturing, can solve the problem that the air between large areas cannot be completely eliminated, the air tightness requirements of composite parts cannot be met, and the size and area of ​​composite skins are large. and other problems, to achieve the effect of eliminating micro-pit porosity defects, improving surface quality and airtight reliability, improving surface quality and mold service life

Inactive Publication Date: 2011-08-31
CHENGDU AIRCRAFT INDUSTRY GROUP
View PDF5 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large size and area of ​​the composite material skin, there are more than 20 sets of large-scale molds that often have slight or even severe air leakage when forming composite material parts, which cannot meet the airtightness requirements required for the manufacture of composite parts
Due to the fact that the FRP layer that makes up the composite material mold cannot completely remove the air between the large-area lamination layers during the manual operation, there are large and small air bubbles; the epoxy resin layer generates gas and heat during cu

Method used

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
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Large composite material skinned die and manufacturing method thereof
  • Large composite material skinned die and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0010] refer to figure 1 . The ultra-large composite material mold for rail vehicles of the present invention is composed of: a support base 1 welded by combining rectangular steel, combined and welded by criss-cross steel plates, and welded and positioned on the support base 1 to form a large-scale skin working surface The support frame 2 consists of a fiberglass layer 3 with a skin profile, an epoxy resin layer 4 bonded to the fiberglass layer 3, and a fluoropolyurethane matte enamel varnish layer 5 sprayed on the surface of the epoxy resin layer 4. The working surface of the FRP layer 3 is segmented according to a length of about 2 meters, and is bonded and fixed on the above-mentioned support frame 2 by epoxy resin. The segmented joints of FRP 3 are filled and connected with epoxy resin; the epoxy resin layer 4 is bonded to the FRP layer 3 and has the surface accuracy requirements of composite parts, and the fluorine polyurethane matt porcelain varnish layer 5 is in The ...

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
Login to view more

PUM

PropertyMeasurementUnit
Thicknessaaaaaaaaaa
Login to view more

Abstract

The invention discloses a large composite material skinned die and a manufacturing method thereof. The die comprises a combined welding supporting base, a combined welding supporting frame, a glass steel layer and an epoxy resin layer which is stuck on the glass steel layer, wherein a layer of fluorinated polyurethane lusterless porcelain varnish is coated on the surface of the epoxy resin layer. Pits on the surface of epoxy resin are completely filled through the fluorinated polyurethane lusterless porcelain varnish, which can be tightly combined with the epoxy resin and has high permeability; the defect that micro air vents are formed on the surface of the epoxy resin of the large composite material skinned die is overcome substantially; and the surface quality and the air tightness reliability of the large composite material skinned die are obviously improved.

Description

technical field [0001] The invention relates to a large-scale skin mold and a manufacturing method thereof, in particular to a super-large composite material skin of a rail vehicle and a manufacturing method thereof. technical background [0002] In order to reduce the weight of the carriages of high-speed rail vehicles, composite materials are used in the prior art to manufacture body skins, and the huge body skins are divided into blocks, with a minimum size of 2 meters and a maximum size of 12 meters. In order to ensure the assembly precision quality and appearance quality of rail vehicles, the precision and appearance quality requirements of each composite material part are very high. For the forming of such large precision composite parts, the supporting base welded with rectangular steel and the supporting frame mold composed of steel plates are currently used. Due to the large size and area of ​​the composite material skin, there are more than 20 sets of large-scale ...

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
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): B21D37/10B32B27/08B32B27/38B32B27/40
Inventor 张勇兵
Owner CHENGDU AIRCRAFT INDUSTRY GROUP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap