1. Ultrasonic welding method
Principle: The principle of ultrasonic plastic welding machine is to generate high-voltage and high-frequency signals from the generator, and use the energy welding head (hom) to transfer to the plastic processing object, and the plastic contact surface generates high temperature through the friction between the surface of the workpiece and the intrinsic molecules. Instantly dissolves and exchanges the plastic joint surface and completes the fusion process in one second.
Application: Widely used in electronics, electrical appliances, auto parts, plastic toys, stationery, handicrafts, cosmetics and other industries.
2, rotating welding method
Principle: The high temperature generated by the high-speed rotation of the motor causes the plastic workpieces to rub against each other. The contact surface of the plastic workpiece is melted, and then the external pressure is applied to drive the upper and lower workpieces into one body, which becomes a permanent combination.
Application: filter (home reverse osmosis filter, industrial filter, medical filter, activated carbon filter...), plastic cup (double cup, beer mug, cup, vase, utensils...), gardening supplies (sprinkler head, fogger, hose head...), ball (hole ball and other practice balls, float balls, toy balls...)
3, hot plate welding method
Principle: The metal hot plate is directly heated to the welding surface of the plastic part to reach a certain melting point, the hot plate is withdrawn, and then a certain pressure is applied to the two plastic parts to achieve the purpose of welding.
Application: For PE, PP, nylon, ABS and other hot plastic plastic parts, such as car lights, water tanks, washing machine balance ring, spray barrels, etc.
4, hot melt welding method
Principle: The heating element is directly heated and dissolved by the heating plate to achieve the purpose of riveting or metal fitting.
Applicable: Especially suitable for screw embedding and hot riveting. Such as switches, mobile phones, all kinds of electronic products.
Knowing the principle and scope of application of various plastic welding methods, it is possible to select a suitable welding method according to its own products.
5, high frequency welding method
Principle: The main principle of the high frequency welding machine is to generate the high frequency electric field plastic polar molecules repeatedly twisted by the self-excited oscillator of the electron tube to generate the friction heat, and then achieve the purpose of welding.
Applicable: all kinds of polyvinyl chloride (PVC)-based plastics, including shoes, trademarks, stickers, raincoats, rain sails, umbrellas, purses, handbags, beach bags, stationery, brand names, inflatable toys, water beds , steam, locomotive cushions, sun visors, door panels, special hard shell vacuum packaging.
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