Fast resin wetting forming technology based on material flow prepeak monitoring

A molding process and resin technology, which is applied in the field of rapid resin infiltration molding process, can solve the problems of inability to realize material flow front peak monitoring and process automatic control, inability to realize process automatic control, high labor cost, etc., and reduce filling such as incomplete infiltration The probability of defect occurrence, the reduction of labor consumption and production costs, and the effect of high automation

Active Publication Date: 2017-01-11
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This scheme relying on manual observation does not involve the monitoring of the front peak of the material flow, and cannot realize the automatic control of the process
[0010] To sum up, in terms of monitoring the front peak of the material flow, the two methods have a certain impact on the structure or appearance of the part, which belongs to destructive monitoring.
In terms of resin infiltration filling process, several methods cannot realize the front peak monitoring of material flow and automatic process control, and the labor cost is relatively high

Method used

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  • Fast resin wetting forming technology based on material flow prepeak monitoring
  • Fast resin wetting forming technology based on material flow prepeak monitoring
  • Fast resin wetting forming technology based on material flow prepeak monitoring

Examples

Experimental program
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Effect test

Embodiment 1

[0074] In this embodiment, each of the three pipelines is one, and the sensor is a photoelectric sensor. figure 1 and figure 2 A schematic diagram of a composition structure and a schematic diagram of a control circuit corresponding to this embodiment are given respectively. The specific sequential work flow of "a rapid resin infiltration molding process system based on material flow front peak monitoring" of the present invention can be described as: when the rubber material starts to infiltrate, click the start button, and the solenoid valve on the feed pipeline in the sequential start and stop process The electromagnetic valve A on A and the intermediate pipeline is energized, and the intermediate pipeline is opened. When the photoelectric sensor installed on the intermediate pipeline detects that the material flow reaches the monitoring position, after a control signal is sent out, the solenoid valve A on the feed pipeline is closed, and the solenoid valve B on the inte...

Embodiment 2

[0076] The photoelectric sensor installed on the pipeline in "A Rapid Resin Infiltration Molding Process Based on Front Peak Monitoring of Material Flow" in this embodiment works based on the working principle of refraction and reflection of transmitted light. The working principle of refraction and reflection of transmitted light is as follows image 3 shown. When there is no glue in the transparent pipeline, the light emitted by the photoelectric sensor transmitting end T is refracted four times through the interface between the air and the pipe wall, and then received by the receiving end R, see image 3 (a); when a material with high light transmittance passes through, the light emitted from the emitting end T of the photoelectric sensor is also refracted four times through the interface between the air and the pipe wall, but because the material replaces the air in the rubber pipeline, resulting in The refractive index changes, and the light that finally passes through th...

Embodiment 3

[0078] In this example, based on the "rapid resin infiltration molding process based on material flow front peak monitoring" of the present invention, an epoxy resin-based thermosetting composite material plate with a size of 23cm×18cm and 10 layers of glass fiber cloth was prepared.

[0079] (1) Prefabricated mold: first apply a layer of release agent on the bottom surface of the mold cavity, cut the glass fiber into a size of 23cm×18cm, and lay it flat on the middle of the bottom surface of the mold cavity, laying 10 layers in total, and lay it on a top Tape the corners on the bottom of the mold cavity to facilitate subsequent demoulding; cut the release cloth into a size of 23cm×18cm, and lay it flat on top of the glass fiber, laying a total of 1 layer; cut the diversion net into 23cm×18cm Size, spread on the top of the release cloth, lay a total of 1 layer, and stick it to the bottom surface with tape at the four top corners; stick the sealant to the bottom surface to form ...

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Abstract

The invention discloses a fast resin wetting forming technology based on material flow prepeak monitoring on the basis of a traditional resin wetting forming technology. A system comprises a monitoring module, a vacuum pump, a vacuum tank, a sensor, electromagnetic valves A, electromagnetic valves B, a throttling valve, a die, a storage tank, filler, die releasing cloth, a flow guide net, a flow guide pipe, a pipeline connecting piece, sealing cloth, a feeding pipeline, a middle pipeline and a gas extraction pipeline. The technology process mainly includes the steps that the die is divided into multiple filling areas; the material flow prepeak position is monitored through the sensor in the monitoring module; sequential starting and stopping of all the pipelines are controlled in cooperation of a controller, and step-by-step filling is achieved for the different filling areas; and after all the areas are filled with sizing materials, curing forming is conducted, then die releasing is conducted, and a product can be obtained. Compared with a traditional technology, the fast resin wetting forming technology has the beneficial effects that sizing material prepeak lossless monitoring is achieved, and the automation degree is high; and the probability of filling defects such as incomplete wetting can be better lowered, and meanwhile the labor cost is reduced. The fast resin wetting forming technology is particularly suitable for processing and producing of various large thermosetting resin matrix composite materials of complex structures.

Description

technical field [0001] The invention relates to a rapid resin infiltration molding process based on material flow front peak monitoring, and belongs to the technical field of liquid molding of thermosetting resin-based composite materials. Background technique [0002] The flexible manufacturing process of thermosetting resin-based composite materials and the excellent comprehensive performance of the products make them widely used in industries such as national defense, aviation, electric power, automobiles, and building materials. At present, the artificial layering process is relatively widely used in the product manufacturing process, but the production efficiency of this process is relatively low, and the proportion of resin in the product is relatively large, which increases the quality of the product while weakening the comprehensive mechanical properties of the product. The consistency of glue content and product thickness in the product is difficult to guarantee. I...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/36B29C70/54
CPCB29C70/36B29C70/54
Inventor 毕超张晓强
Owner BEIJING UNIV OF CHEM TECH
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