Defoaming device of single-component liquid resin and defoaming method

Abstract

The invention provides a defoaming device of single-component liquid resin. The defoaming device comprises a feeding channel, a heating system, a defoaming device, a vacuum system and a discharging channel, wherein the heating system is provided with a heating runner; the feeding channel is connected with the heating runner of the heating system, the heating runner of the heating system is connected with the defoaming device, the defoaming device is connected with the discharging channel, and the vacuum system provides a vacuum environment for the defoaming device. The invention further provides a defoaming method utilizing the device. Operation time spent on filling liquid resin is prolonged, and curing risks are avoided.

Description

technical field [0001] The invention relates to the field of liquid resin molding, in particular to a defoaming device and a defoaming method for single-component liquid resin. Background technique [0002] During the production and transportation of liquid resin, a large amount of gas will be carried into the liquid. During the infusion molding process, the gas enters and stays in the product area together with the liquid resin, resulting in a low local resin content of the molded product, and the surface of the product shows White spots affect the quality and service life of wind turbine blades. Therefore, it is necessary to remove the gas in the resin before vacuum infusion to ensure the quality of vacuum infusion molding products. [0003] At present, it is commonly used to place the liquid mixture of resin and curing agent in a vacuum box for a certain period of time, so that the gas in the liquid mixture can be removed. The method of using a vacuum box to remove the ...

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Problems solved by technology

[0005] However, there are the following defects in the above-mentioned patent: firstly, the mixing of liquid resin is generally still a two-component liquid mixture formed by mixing resin and curing agent. There is a risk of gelation and curing. Generally, when the two-component resin with a curing agent is placed at a room temperature of about 25°C, it will start to heat up and gel after being placed for about 40 minutes. \The operation time during the infusion process is short; secondly, because the resin mixture flows through the multi-layer spiral laminar flow plate by its own gravity, the viscosity of the resin mixture is relatively high at low temperature, and it cannot be fully dispersed, so that the thickness of the liquid film is relatively thick, and the dispersed resin The air bubbles in the liquid film have high tension and cannot be fully removed, which affects the degassing effect; thirdly, because the resin and the curing agent are mixed and then degassed, the pipelines for feeding and discharging materials and the degassing device need to be cleaned after each use. Otherwise, the mixture of resin and curing agent will block the system after curing, making the equipment unable to use normally, and the cleaning system needs to use one-component resin, which not only wastes raw materials, but also is a very cumbersome work, and there is also risk in incomplete cleaning; finally , The continuous operation of the vacuum degassing system is realized through human judgment and manual control of the valve. There are differences in individual operations, resulting in weak consistency of the final infusion-molded product and quality cannot be guaranteed.

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