A method for forming a square, equal-section, and large-size composite material box

A composite material and molding method technology, which is applied in the field of composite material box molding to achieve the effects of low porosity, good box surface quality and controllable quality

Active Publication Date: 2021-03-16
JIANGSU XINYANG NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for forming a large-size composite material box with a square equal cross-section, which solves the problem of air tightness of the composite material box itself; improves the internal quality of the box body, reduces porosity; improves the mechanical performance strength of the box body; Solve surface quality problems without machining, reducing costs

Method used

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  • A method for forming a square, equal-section, and large-size composite material box
  • A method for forming a square, equal-section, and large-size composite material box
  • A method for forming a square, equal-section, and large-size composite material box

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] A box with a cross-sectional size of 430mm*430mm, a wall thickness of 5mm, and a length of 4500mm is made by prepreg laying and autoclave molding; the specific operation steps are as follows:

[0047] 1) According to the strength calculation result, use the automatic cutting machine to cut the plain weave prepreg and unidirectional prepreg required for the layup;

[0048] 2) Use a release agent to clean the surface of the metal mold;

[0049] 3) Prepreg laying, after the first and third layers of prepreg laying are completed, lay the film;

[0050] 4) After the 20-layer prepreg is laid, put appropriate auxiliary materials on the surface of the prepreg and the L-shaped auxiliary die at the R angle;

[0051] 5) Winding of demoulding ring ribs to assist the demoulding of the composite material box, and use the winding process to form ring ribs with a height of about 50mm at both ends of the box mold;

[0052]6) Put the vacuum bag into the tank for curing. Due to the larg...

Embodiment 2

[0057] A box with a cross-sectional size of 630mm*630mm, a wall thickness of 7mm, and a length of 6700mm is made by prepreg laying and autoclave molding. The specific operation steps are as follows:

[0058] 1) According to the strength calculation result, use the automatic cutting machine to cut the plain weave prepreg and unidirectional prepreg required for the layup;

[0059] 2) Use a release agent to clean the surface of the metal mold;

[0060] 3) Prepreg laying, after the first and third layers of prepreg laying are completed, lay the film;

[0061] 4) After the 28-layer prepreg is laid, put appropriate auxiliary materials and the L-shaped auxiliary die at the R angle on the surface of the prepreg;

[0062] 5) Winding of demoulding ring ribs to assist the demoulding of the composite material box, and use the winding process to form ring ribs with a height of about 50mm at both ends of the box mold;

[0063] 6) Put a vacuum bag into the tank for curing. Because the com...

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PUM

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Abstract

The invention discloses a method for forming a square equal-section large-dimension compound material tank. The method comprises the following steps of (1) preparing prepreg and adhesive films; (2) preparing a metal mold; (3) cutting the prepreg; (4) according to an established layer stacking sequence, laying the prepreg on the mold; (5) laying the adhesive films; (6) performing mold pressing at Rcorners; (7) processing reinforced bars for winding structured members by a binding technology for demolding; (8) pumping vacuum bags into a jar for solidification: arraying 2-3 vacuumizing positionson each of the two sides of the mold, ensuring the vacuum state of parts, embedding thermocouples in an inner cavity and the outside of the mold, and monitoring the solidification temperature of thetank; (9) performing external pressurizing, guaranteeing the air tightness, the internal quality and the appearance quality of the tank at the same time, and selecting external pressure, wherein the temperature is decided by the selected prepreg resin system; (10) performing demolding of the compound material tank; and (11) after the demolding working procedure on the compound material tank, performing thorough trimming on the surfaces of the compound material tank, and the forming of the tank is completed. Through the adoption of the method disclosed by the invention, the problem of air tightness of the compound material tank is solved, and the internal quality of the tank is improved.

Description

technical field [0001] The invention relates to a composite material box body, in particular to a molding method for a composite material box body. Background technique [0002] The traditional square-shaped and equal-section large-size composite boxes are formed by hand lay-up process and wet winding process. The production efficiency of the hand lay-up process is low, the labor intensity is high, the labor hygiene conditions are poor, the product quality is not easy to control, the performance stability is not high, and the product mechanical properties are low. The wet winding process is to directly wind the roving onto the mandrel after impregnating it with resin glue. Since the fiber yarn is immediately wound after dipping, the quality of the yarn sheet is not easy to control and inspect. At the same time, there is a large amount of solvent in the glue, which is easy to generate bubbles during curing, and the tension is not easy to control during the winding process. F...

Claims

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Application Information

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IPC IPC(8): B29C70/44B29C70/54B29C35/02B29C35/00
CPCB29C35/007B29C35/02B29C70/44B29C70/54
Inventor 张兰张林张彬李俊
Owner JIANGSU XINYANG NEW MATERIALS CO LTD
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