Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for detecting and removing air tightness defect of epoxy resin mould

An epoxy resin and air-tight technology, which is applied in the direction of measuring devices, suspension and porous material analysis, scientific instruments, etc., can solve the problems that the release of micro-pores cannot be thoroughly discovered, and the defects of micro-pores cannot be fundamentally eliminated. To achieve the effect of improving surface quality and service life, ensuring air tightness and good permeability

Inactive Publication Date: 2010-07-14
CHENGDU AIRCRAFT INDUSTRY GROUP
View PDF0 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods cannot fundamentally eliminate these micro-pore defects because they cannot thoroughly discover the distribution of micro-pores

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Fluorine polyurethane matt enamel can be diluted according to the following components and proportions: 100 parts of TS96-71 fluorine polyurethane emulsion, 10 parts of paint curing agent, 30 parts of thinner, and stir evenly. When in use, you can use a paint spray gun to put the diluted fluoropolyurethane matt enamel into the paint spray gun, spray the fluoropolyurethane matt enamel evenly on the surface of the epoxy resin mold, and evenly spray a coating with a thickness of about 0.1mm. After standing for 12 hours, observe the surface of the epoxy resin mold in a well-lit place, use an air drill to drill a pit with a diameter of Φ6mm and a depth of about 5mm at the micropore defect, and then fill it with epoxy resin. After the epoxy resin is cured, sand On the smooth surface, spray the fluoropolyurethane matt enamel diluted according to the above ratio and check whether the micropore defects have been completely eliminated. If there are still micro-pore defects, repea...

Embodiment 2

[0015] Use 90 parts of TS96-71 fluoropolyurethane emulsion, 10 parts of curing agent, and 30 parts of thinner, and stir evenly to form fluoropolyurethane matt enamel; then put the diluted fluoropolyurethane matte enamel into the paint spray gun, and spray evenly on the epoxy resin On the surface of the mold; the thickness is about 0.2mm. After placing it for 10-12 hours in a well-lit place, observe the surface condition of the epoxy resin mold. Use an air drill to drill a pit with a diameter of Φ5mm and a depth of about 4mm at the micropore defect, and then use Fill it with epoxy resin, sand the surface after the epoxy resin is cured, and then spray the fluoropolyurethane matt enamel diluted in the above ratio, and check whether the micropore defects have been completely eliminated. If there are still micro-pore defects, repeat the operation according to the above method until all the defects are eliminated, and finally spray twice to improve reliability.

[0016] The curing a...

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

No PUM Login to View More

Abstract

The invention discloses a method for detecting and removing the air tightness defect of an epoxy resin mould. The method comprises the following steps of: uniformly stirring 80 to 100 parts of fluorinated polyurethane emulsion, 8 to 10 parts of curing agent and 20 to 30 parts of diluent into a fluorinated polyurethane aphotic enamel paint; putting the diluted fluorinated polyurethane aphotic enamel paint in a paint spray gun, and uniformly spraying the paint on the surface of the epoxy resin mould; standing for 12 hours, observing the micropore defect on the surface of the epoxy resin mould under good light; and drilling a pit with the diameter no more than phi 6mm in a micropore defect part, filling up the pit by epoxy resin, sanding the surface, and spraying the diluted fluorinated polyurethane aphotic enamel paint. The method is simple, convenient and rapid, and has low cost; and the micropore defect on the surface of the epoxy resin mould can be rapidly found and removed, the surface hardness of the mould can be improved, and the service life of the mould can be prolonged.

Description

technical field [0001] The invention relates to a method for detecting and eliminating microporous defects affecting airtightness of epoxy resin molds. Background technique [0002] At present, the body and front skin of the maglev train made of composite materials are all vacuum-molded on a large mold with a minimum size of 2 meters and a maximum size of 12 meters. The typical structure of the mold is steel skeleton base + glass fiber reinforced plastic body + epoxy resin surface. In order to ensure the forming quality of composite parts, the vacuum airtightness of the mold is generally required to be very high. However, the adhesive between the epoxy resin surfaces of the FRP body has air that cannot be completely eliminated and the gas generated by the curing of the epoxy resin, resulting in a micro-reticular air path in the mold and microporous defects on the surface. Due to the existence of micropores, it is difficult to ensure the airtightness of the mold. If microp...

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): B29C33/70G01N15/08
Inventor 张勇兵谢安彬肖慧儒
Owner CHENGDU AIRCRAFT INDUSTRY GROUP
Features
  • Generate Ideas
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com