New method for welding plastics by metal laser welding machine

Abstract

The invention discloses a new method for welding plastics by a metal laser welding machine, which comprises the following steps of: a) controlling a special board card by adopting a computer to output a near infrared ray laser with a certain frequency and wavelength of between 800 and 1,064 nanometers; and b) clamping two plastic components to be welded, allowing the near infrared ray laser to transmit a first component in a mode of deviating from a focal point, absorbing the transmitted near infrared ray laser by a second component, converting the absorbed near infrared ray laser into heat energy, and melting a contact surface of the two components to form a welding area. By the method, precise, firm and sealing welding can be formed, resin degradation is less, generated fragments are fewer, surfaces of products are connected closely on the periphery of a welding line, high-speed welding can be realized only by low frequency, and the efficiency of the method is three times that of general plastic welding.

Description

[0001] technical field [0002] The invention belongs to the technical field of laser welding, and in particular relates to a new method for welding plastics with a metal laser welding machine. Background technique [0003] Traditional plastic welding is realized by heating, the heat-affected zone is large, and the surface will be deformed, which will affect the appearance. Moreover, the vibration stress and thermal stress of the welded products are very large, which means that the aging speed of the products or internal components of the device is very fast, which greatly shortens the service life of the products. [0004] So far there has been no extensive research on the application of metal laser welding machines to weld plastic parts of different materials. Contents of the invention [0005] The object of the present invention is to provide a method for welding two plastic parts together by using a laser welding machine. [0006] The technical solution adopted by th...

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Problems solved by technology

[0003] Traditional plastic welding is realized by heating, the heat-affected zone is large, and the surface will be deformed, which will affect the appearance

Moreover, the vibration stress and thermal stress of welding products are very large, which means that the aging speed of products or internal components of devices is very fast, which greatly shortens the service life of products

[0004] So far there has been no extensive research on the application of metal laser welding machines to weld plastic parts of different materials

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