Injection apparatus for resin transfer moulding technology

A technology of resin transfer molding and injection equipment, which is applied in the field of injection equipment, can solve problems such as impossibility, complex control system, and complex equipment, and achieve the effects of improving product quality, wide adaptability, and simplifying equipment

Inactive Publication Date: 2006-05-24
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of control system that uses injection flow to control the process is more complicated, and also needs a mixing injection head, so the equipment is also complicated, and it is more suitable for mass industrial production
For resins that exceed the mixing ratio or that require heating to complete the injection, the RTM injection equipment is limited and cannot be completed

Method used

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  • Injection apparatus for resin transfer moulding technology
  • Injection apparatus for resin transfer moulding technology
  • Injection apparatus for resin transfer moulding technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Prepare rectangular composite specimens.

[0024] First fiber prefabricated part is packed in the mold 9, and this mold cavity is consistent with final product; After the ratio of epoxy resin TDE-85 and 2-methylimidazole curing agent 100: 1 is mixed uniformly, from described Fill the injection port 3 into the resin tank 7, vacuumize the interface 4, remove the air bubbles in the resin, set the temperature of the oil bath heating system 6 to 40°C according to the viscosity-temperature characteristics of the resin, and heat the oil bath In the working state; when the temperature reaches the set value of 40°C, set the required pressure of 0.2Mpa according to the fiber volume content and structure of the prefabricated part, and open the output switch 11 connected between the resin tank 7 and the delivery pipeline 8 at the same time The input switch 12 communicated with the delivery pipeline 8 and the mold 9, and the air source 14 is connected at the air nozzle 1, so that th...

Embodiment 2

[0026] Fabrication of three-dimensional structural composite joints

[0027]The fiber preform of the splice is first loaded into a mold 9 whose cavity corresponds to the final splice article. Pour the modified phenolic resin into the resin tank 7 from the injection port 3, vacuumize the interface 4, get rid of the bubbles of the resin in the resin tank 7, set the temperature of the oil bath heating system 6 according to the viscosity-temperature characteristics of the resin The temperature is 90°C, so that the oil bath heating system 6 is in working condition. When the temperature reaches the set value of 90° C., set the required pressure of 0.6 Mpa according to the fiber volume content and structure of the preform, and the remainder is the same as in Example 1. The three-dimensional structural composite material joint made by the injection device of the present invention is as follows: image 3 shown. Compared with the traditional injection equipment, the injection equipme...

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Abstract

The present invention relates to an injection equipment capable of utilizing resin to transfer moulding technique. It includes air supply, vacuum pump, resin tank, delivery pipeline and mould device. In the interior of the described resin tank a stirrer is mounted, on the tank cover are set an air nozzle connected with external air supply, an injection port and a mouthpiece connected with vacuum pump. The resin tank is communicated with delivery pipeline by means of output switch, another end of the delivery pipeline is connected with mould device whose top face is equipped with an exhaust hole by means of input switch, the exterior of the resin tank and delivery pipeline is covered with oil-bath heating system, and said oil-bath heating system is communicated with oil-bath circulating pump.

Description

technical field [0001] The invention relates to a composite material liquid molding technology, especially an injection device for resin transfer molding technology, and the main classification number of the international patent is intended to be Int.Cl 7 B29C 70 / 16. Background technique [0002] Resin Transfer Molding (RTM) is a molding technique for composite materials. The composite material components produced by this process have the characteristics of local reinforcement, smooth on both sides, accurate dimensions, and environmental friendliness. Therefore, they are more and more widely used in aerospace, transportation, electrical appliances and other fields. Some domestic enterprises from abroad in the 1980s The Jinbaihe RTM injection machine was introduced, but this equipment is only suitable for the use of resin at room temperature. The cleaning of the equipment will consume a large amount of solvent. In addition, the immature domestic non-metallic mold manufactur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/48B29C70/54
Inventor 李嘉禄吴晓青
Owner TIANJIN POLYTECHNIC UNIV
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