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Re-injection process and equipment for poured resin adhesive solution when discharging air bubbles during composite material RTM molding process

A technology for resin glue and composite materials, applied in the field of re-injection process and special equipment, can solve problems such as pollution of the environment, waste of resin glue, etc., and achieve the effects of reducing emissions, reducing production costs, and being easy to replace

Active Publication Date: 2009-05-27
北京玻钢院复合材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems of waste of a large amount of resin glue flowing out of air bubbles and polluting the environment during the production of composite RTM products, the purpose of the present invention is to provide a method for re-injecting resin glue out of air bubbles during the RTM molding process of composite materials. Methods and special equipment

Method used

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  • Re-injection process and equipment for poured resin adhesive solution when discharging air bubbles during composite material RTM molding process
  • Re-injection process and equipment for poured resin adhesive solution when discharging air bubbles during composite material RTM molding process

Examples

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Effect test

example 1

[0064] Example 1: use technology of the present invention and special equipment, realize its following steps:

[0065] 1) During RTM production, the accelerator ratio of the resin system is 0.5%, the curing agent ratio is 1.5%, and the retarder acetylacetone is quantitatively added in the raw material barrel 12 according to the ratio of 0.1% of the total amount according to the amount of resin glue to be collected Finally, the resin glue liquid flowing out during the RTM production process is filtered through a 60-mesh screen and collected in the raw material barrel 12, and stirred evenly with the agitator 13. The mold for the first production of the product should be clean and use semi-permanent demoulding agent, the resin will not be polluted when flowing through the pipeline, and ensure that the release agent and the like are not mixed into the resin glue;

[0066] 2) Start the vacuum pump 2, open the vacuum valve 3 and the feed valve 16, and use vacuum suction to suck the ...

example 2

[0072] Example 2: use process technology and special equipment described in the present invention, concrete steps are identical with example 1, do not repeat them here, and its difference is:

[0073] When RTM is produced, the accelerator ratio of the resin system is 0.8%, the curing agent ratio is 1.25%, and the retarder acetylacetone is added in the raw material barrel 12 to be 0.05%; the resin glue liquid flowing out during the RTM production process is passed through a 40-mesh screen Collected in the raw material bucket 12 successively after filtering;

[0074] The temperature of the resin glue in step 2) and the room temperature are both 23°C;

[0075] Step 3) The degassing time for the resin glue is 20 minutes; the temperature of the tank body 19 is 26°C;

[0076] Step 4) inject the pressure into the tank body 19 to an initial injection pressure of 0.1 MPa;

[0077] Step 5) start injection into the mold 1, and the mold temperature is 23°C; the pressure in the tank body 1...

example 3

[0078] Example 3: use process technology and special equipment of the present invention, concrete steps are identical with example 1, do not repeat them here, and its difference is:

[0079] When RTM is produced, the accelerator ratio of the original resin system is 1%, the curing agent ratio is 1.75%, and the retarder acetylacetone is added in the raw material barrel 12 to be 0.2%; Collected in succession in the raw material bucket 12 after sieve filtering;

[0080] The resin glue solution and room temperature of step 2) are both 15°C;

[0081] Step 3) The degassing time for the resin glue is 30 minutes, and the temperature of the tank body 19 is 20°C;

[0082] Step 4) inject the pressure into the tank body 19 to an initial injection pressure of 0.15MPa;

[0083] Step 5) Start injection into the mold 1, the temperature of the mold 1 is 15°C; the pressure in the tank body 19 can be adjusted in the range of 0.15-0.6Mpa as required, so as to control the feed rate at 20-2000g / m...

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Abstract

The invention discloses a process for re-injecting resin adhesive liquid discharged from exhaust bubble in composite material RTM moulding process and a device thereof; the process comprises the steps as follows: the resin adhesive liquid is filtered by a screen mesh and collected to a material barrel added with retarder to be stirred; the evenly stirred resin adhesive liquid is sucked into a tank under the pull of vaccum, the tank is vacuumized and de-foaming is carried out on the resin adhesive; pressure is injected into the tank in which the resin adhesive liquid is stored after de-foaming, under the effect of the pressure, the resin adhesive liquid after de-foaming is injected into a mould; meanwhile pressure is continuously injected into the tank at the filling speed of 5-2000g / min; finally residual resin adhesive liquid in the empty tank after filling and in the pipeline connecting the mould with the tank is cleaned. The pipeline is positioned between the mould and the tank. The device comprises a sealed tank, a discharge nozzle connected with the tank, an air inlet pipeline, the mould and the material barrel. The invention can effectively reduce the production cost, save energy and reduce emission, and reduce the emission of waste material; in addition, the invention has remarkable economic and social benefits and is conducive to popularization and application.

Description

technical field [0001] The invention relates to an RTM forming process and equipment of composite materials, in particular to a reinjection process and special equipment for releasing air bubbles and flowing out resin glue during the RTM forming process of composite materials. Background technique [0002] The traditional composite material RTM (resin transfer molding) molding process means that the resin glue is injected into the mold cavity, and under pressure, the resin glue flows in the reinforced material preform and is transferred to various parts, filling the mold cavity The air bubbles in the mold cavity are cleared by flowing glue, and then solidified to make the molding process of the product. [0003] In the mass production process of composite RTM products, due to the air bubble process will be accompanied by a large amount of resin glue flowing out, the amount of resin glue flowing out generally accounts for about 5% to 25% of the glue used in the product, and t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C45/02B29C45/76B29B13/10B29B13/00C08J3/20B29C70/48
Inventor 唐泽辉张伟吕雪崔广群毕向军王凌君高红成管兰兰
Owner 北京玻钢院复合材料有限公司
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