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Continuous rolling shaping method of low-temperature thick wall GFRP tube

A technology of glass steel pipes and manufacturing methods, which is applied in the direction of tubular objects, applications, household appliances, etc., can solve problems such as large interlayer tensile stress, and achieve the effect of good mechanical properties and heat insulation performance

Inactive Publication Date: 2009-07-08
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of developing thick-walled glass steel pipes, the glass steel pipes made by domestic glass fiber reinforced plastic manufacturers using dry step-by-step and continuous forming methods all have interlayer delamination, and many researches have not been successful. The main reason is that large Interlaminar tensile stress

Method used

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  • Continuous rolling shaping method of low-temperature thick wall GFRP tube

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0028] The process of making glass steel pipes with a wall thickness of 145±2mm is as follows:

[0029] The site temperature is 20°C and the humidity is 65%.

[0030] 1. Use degreasing alkali-free glass fiber cloth treated by Wolan coupling, model VN-EW100B-100Y. Before rolling, the fiber cloth is baked and dehumidified in an oven at 80°C for 10 hours.

[0031] 2. The glue is made of bisphenol A type epoxy resin E-51 and curing agent is 651II type polyamide resin. Mixing ratio: 70% epoxy resin, 30% curing agent, 1.5kg glue for each preparation.

[0032] 3. Wrap the acetone-cleaned tire mold, rollers and pressure rollers with 2 layers of polyester film, then scrub the outer surface with acetone, stick the joints at both ends firmly with tape, and replace the polyester film on the rollers and pressure rollers every 8 hours. Roll mass is 270kg / m. The quality of the pressing roller is 280kg / m. The tire mold diameter is 290mm.

[0033] 4. Before rolling, place the tire mold, ...

example 2

[0040] The process of making glass steel pipes with a wall thickness of 205±2mm is as follows:

[0041] The site temperature is 15°C and the humidity is 60%.

[0042] 1. Use degreasing alkali-free glass fiber cloth treated by Wolan coupling, model VN-EW100B-100Y. Before rolling, the fiber cloth is baked and dehumidified in an oven at 80°C for 9 hours.

[0043]2. The glue is made of bisphenol A type epoxy resin E-51 and curing agent is 651 type II polyamide resin. Mixing ratio: 70% epoxy resin, 30% curing agent, 2kg of glue each time.

[0044] 3. Wrap the acetone-cleaned tire mold, rollers and pressure rollers with 2 layers of polyester film, then scrub the outer surface with acetone, stick the joints at both ends firmly with tape, and replace the polyester film on the rollers and pressure rollers every 8 hours. Roll quality is 280kg / m. The quality of the pressing roller is 290kg / m. The tire mold diameter is 340mm.

[0045] 4. Before rolling, place the tire mold, the thir...

example 3

[0052] The process of making glass steel pipes with a wall thickness of 262.5±2mm is as follows:

[0053] The site temperature is 25°C and the humidity is 55%.

[0054] 1. Use degreasing alkali-free glass fiber cloth treated by Wolan coupling, model VN-EW100B-100Y. Before rolling, the fiber cloth is baked and dehumidified in an oven at 80°C for 8.5 hours.

[0055] 2. The glue is made of bisphenol A type epoxy resin E-51 and curing agent is 651II type polyamide resin. Mixing ratio: 70% epoxy resin, 30% curing agent, 2kg of glue each time.

[0056] 3. Wrap the acetone-cleaned tire mold, rollers and pressure rollers with 2 layers of polyester film, then scrub the outer surface with acetone, stick the joints at both ends firmly with tape, and replace the polyester film on the rollers and pressure rollers every 8 hours. Roll mass is 290kg / m. The quality of the pressing roller is 300kg / m. The tire mold diameter is 395mm.

[0057] 4. Before rolling, place the tire mold, the thi...

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Abstract

Low-temperature thick-walled glass steel pipe continuous rolling molding production method, the raw material used is degreased alkali-free glass fiber cloth treated by Worland coupling, and the glue used is made of 70% bisphenol A epoxy resin E-51 and It is formulated with 30% 651 type II polyamide resin. Adopting the normal temperature and wet continuous rolling forming process, the glass cloth is continuously rolled and formed on a mechanized assembly line integrating gluing, pressing, repairing, scraping and rolling. When the outer diameter of the glass steel pipe reaches the specified size, the cloth feeding is stopped, and the equipment continues to run for normal temperature curing. After the normal temperature curing is completed, it is placed in an oven for post-curing treatment. The low-temperature thick-walled glass steel pipe produced by the method of the invention does not appear delamination, and has good mechanical properties and heat insulation performance.

Description

technical field [0001] The invention relates to a method for continuous rolling and forming of low-temperature thick-walled glass steel pipes, in particular to a method for manufacturing thick-walled glass steel pipes by wet continuous rolling, which is suitable for heat insulation supports of low-temperature storage tanks and other Insulating supports for cryogenic equipment. The invention belongs to the technical field of cryogenic engineering and cryogenic material manufacturing technology. Background technique [0002] Glass fiber reinforced composite material (GFRP), commonly known as FRP, uses glass fiber as a reinforcing material, which is a representative type of fiber reinforced materials, and other types of fiber reinforced materials (boron fiber, carbon fiber, alumina fiber, Kevlar fiber, etc.) In comparison, the elastic modulus of glass fiber is low, but the biggest feature is the large ratio of strength to thermal conductivity. Epoxy resin is a kind of thermos...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C63/02B29K77/00B29L23/00
Inventor 汪荣顺石玉美刘元明
Owner SHANGHAI JIAOTONG UNIV