Method for reducing difficulty of ultrasonic welding of engineering plastics

Abstract

The invention discloses a method for reducing the difficulty of ultrasonic welding of engineering plastics. The method is characterized by comprising the following steps that S1, before ultrasonic welding of the engineering plastics, an auxiliary welding reagent is coated on the welding surface of the engineering plastics in advance, and the auxiliary welding reagent comprises an activating agent.According to the method, the welding surface of the engineering plastic is treated by selecting the auxiliary welding reagent, so that the surface of the engineering plastic is subjected to ultrasonic welding after being subjected to pre-dissolving and activating treatment, and then only low-power ultrasonic welding equipment is needed for wave generation welding, so that the welding difficulty can be reduced, the strength and function requirements of a welding assembly are guaranteed, the power requirement of welding equipment is lowered, cost is saved, and meanwhile unification and standardization of the equipment are promoted.

Description

technical field [0001] The invention relates to a method for reducing the difficulty of ultrasonic welding of engineering plastics. Background technique [0002] At present, more and more engineering plastics are used in the injection molding industry. For the injection molding industry, the main parts welding methods are ultrasonic welding and hot plate welding. Relatively speaking, the hot plate solder slag is serious, there is a smoke layer, the cycle is long, The space occupation rate is high and it is not suitable for full automation. Ultrasonic welding has a short cycle, low space occupation rate, environmental protection and easier full automation. However, due to different materials, the choice of welding methods is greatly restricted, such as polyamide (PA), PA material has a high melting temperature and strong shock absorption. Therefore, compared with the hot plate welding process, its ultrasonic welding has extremely high requirements for welding equipment, and t...

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Problems solved by technology

[0002] At present, more and more engineering plastics are used in the injection molding industry. For the injection molding industry, the main parts welding methods are ultrasonic welding and hot plate welding. Relatively speaking, the hot plate solder slag is serious, there is a smoke layer, the cycle is long, The space occupation rate is high and it is not suitable for full automation. Ultrasonic welding has a short cycle, low space occupation rate, environmental protection and easier full automation. However, due to different materials, the choice of welding methods is greatly restricted, such as polyamide (PA), PA material has a high melting temperature and strong shock absorption. Therefore, compared with the hot plate welding process, its ultrasonic welding has extremely high requirements for welding equipment, and the welding effect is still not ideal, so it can effectively reduce the difficulty of ultrasonic welding of engineering plastics. seems particularly necessary

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