Optimization Strategies for Defoaming Technology of Vacuum Stirring Equipment in the Adhesive Paste Industry
Adhesive paste products have extremely strict requirements on the bubble content, and the defoaming effect of vacuum stirring equipment directly affects the bonding performance and appearance quality of adhesive paste. Technical engineers have summarized three defoaming technology optimization strategies. The first is gradient control of vacuum degree - a stepped vacuum pumping method is adopted. In the initial stage, a vacuum degree of -0.05MPa is used to remove a large number of free bubbles, and in the later stage, the vacuum degree is gradually increased to above -0.095MPa to avoid adhesive paste splashing caused by a sudden increase in vacuum degree. The second is optimization of stirring trajectory - changing the traditional circular stirring to planetary stirring. Through the combined motion of revolution and rotation, the adhesive paste continuously updates its surface during the stirring process, accelerating the escape of bubbles, and the stirring uniformity can be increased to more than 98%. The third is improvement of cavity structure - guide grooves are set on the inner wall of the stirring kettle to reduce material dead corners, and an arc-shaped bottom design is adopted to avoid bubble accumulation at the bottom of the kettle. Through practical tests, the optimized equipment can control the bubble content of adhesive paste below 0.1%.
Oct 30,2025
Adhesive paste products have extremely strict requirements on the bubble content, and the defoaming effect of vacuum stirring equipment directly affects the bonding performance and appearance quality of adhesive paste. Technical engineers have summarized three defoaming technology optimization strategies. The first is gradient control of vacuum degree - a stepped vacuum pumping method is adopted. In the initial stage, a vacuum degree of -0.05MPa is used to remove a large number of free bubbles, and in the later stage, the vacuum degree is gradually increased to above -0.095MPa to avoid adhesive paste splashing caused by a sudden increase in vacuum degree. The second is optimization of stirring trajectory - changing the traditional circular stirring to planetary stirring. Through the combined motion of revolution and rotation, the adhesive paste continuously updates its surface during the stirring process, accelerating the escape of bubbles, and the stirring uniformity can be increased to more than 98%. The third is improvement of cavity structure - guide grooves are set on the inner wall of the stirring kettle to reduce material dead corners, and an arc-shaped bottom design is adopted to avoid bubble accumulation at the bottom of the kettle. Through practical tests, the optimized equipment can control the bubble content of adhesive paste below 0.1%.
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