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Technological method for pultrusion of glass fibre reinforced plastics pipe and die thereof

A technology of pultrusion and glass steel pipes, which is applied in the pultrusion of glass steel pipes, and in the field of special forming molds for this pultrusion method, which can solve the problems of restricting the application of pultrusion technology, mold blocking, and resin peeling on the inner wall. Achieve the effect of overcoming the wrinkle phenomenon of the felt layer, curing well, and avoiding uneven temperature

Inactive Publication Date: 2002-12-18
柳惠平
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when using this molding process to produce glass steel pipes with a larger diameter (D ≥ 100 mm) and a thinner wall thickness (t ≤ 4 mm), quality and process problems such as inner wall resin peeling and mold blocking are often prone to occur. Therefore, Restricts the application of the pultrusion process in the production of thin-walled and large-diameter pipes

Method used

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  • Technological method for pultrusion of glass fibre reinforced plastics pipe and die thereof
  • Technological method for pultrusion of glass fibre reinforced plastics pipe and die thereof
  • Technological method for pultrusion of glass fibre reinforced plastics pipe and die thereof

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Embodiment

[0020] The product object of this embodiment is a glass fiber reinforced plastic cable protection tube with an inner diameter of 150 mm and a wall thickness of 3.3 mm. For the process, see figure 1 , where 1 is the creel, 2 is the yarn cluster, 3 is the yarn bundle, 4 is the yarn guide plate, 5 is the rubber tank, 6 is the dipped yarn, 7 is the felt roll, 8 is the reinforcing felt, and 9 is the mold core. 10 is a mold core support, 11 is a mold cavity heating plate, 12 is a mold cavity, 13 is a mold core heating device, 14 is a drawer head, 15 is a product, and 16 is a cutting device. The specific process steps are: A. Dipping yarn— ——Pull out the yarn end from the glass fiber yarn cluster on the creel and arrange it through the yarn guide plate

[0021] Finally, impregnate through the glue tank filled with resin ingredients; B, felt yarn compounding - use multiple glass fiber felts drawn from the felt frame to overlap to form two layers,

[0022] The glass fibe...

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Abstract

The present invention relates to a pultrusion process for making glass fibre reinforced plastics tube and its special-purpose die equipment. Said process includes the steps of soaking yarn, felt-yarncombination, preforming, solidfying and forming and tube-discharging and coaling. Its special-purpose die equipment includes a die cavity whose internal diameter is equal to the external diameter of formed glass fibre reinforced plastic tube, the periphery of said die cavity is equipped with heating device, a die core whose external diameter is equal to the internal diameter of formed glass fibrereinforced plastic tube is cover-mounted in the interior of die cavity, the centre of said die core is hoelow, and its interior is equipped with heating device. Said invention adopts common heating method in exterior and interior of said die cavity, so that the interior and exterior of glass fibre reinforced plastic tube are solidified well, and its surface is smooth.

Description

technical field [0001] The invention relates to a forming process method of glass fiber reinforced plastics, in particular to a pultrusion forming method of glass steel pipes. Simultaneously, the invention also relates to a special molding die for realizing the pultrusion molding method. Background technique [0002] FRP has outstanding advantages such as high strength, good rigidity, anti-aging, and long service life, so it is widely used in the fields of cable protection and other fields. The production process of traditional glass steel pipes is mostly hand lay-up process, that is, the glass steel cloth is manually wound on the core steel pipe slightly longer than the product, and the resin is impregnated while brushing until the specified laying thickness is reached, and finally passed through room temperature or The heating and curing method makes the product solidify and shape. This process method has low production efficiency, high labor intensity, unstable quality,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C63/06
Inventor 柳惠平
Owner 柳惠平
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