Combination method of plastic structural parts and infrared-transmitting parts

Abstract

A combination method of a plastic structure member with an infrared-transmitted part, wherein the plastic structure member is welded to the infrared-transmitted part intergratedly through an ultrasonic welding technology for replacing a conventional process of adhesion with glue, thereby omitting processes of employing the glue and drying the glue. By means of infinite circular usage of ultrasonic, the method can reduce production cost and increase the production efficiency of a company. In addition, by means of design of welding lines, the relative position and height relationship between periphery welding lines and center welding lines are accurate, so that not only is welding firmness reached and light stopping treatment of the center welding lines achieved, but also the surface of the infrared-transmitted part is free of damage and wrinkle, thereby avoiding warping during the welding process.

Description

technical field [0001] The invention relates to a bonding process between two plastic parts of different materials, in particular to an ultrasonic bonding method of a plastic structural part and an infrared-transmitting part. Background technique [0002] Infrared-transmitting parts, such as black infrared-transmitting acrylic lenses are black or dark red materials based on acrylic. The characteristic of this material is to give black vision in the visible light range (400-700nm visible light transmittance is less than 1%), but it can pass through the near-infrared region with wavelengths above 800-1600nm. The infrared transmittance depends on the thickness of the component and the working band. And color requirements can vary from 80% to 93%. It is widely used in communication components with infrared transparency. While helping to pass infrared signals, it can easily cover the internal structure because of the visual blackness. It is widely used in infrared signal transm...

AI Technical Summary

Problems solved by technology

[0003] In the field of motion control interactive modules, such as the combination of the above-mentioned plastic structural parts and infrared-transmitting parts, there are many problems in the use of traditional dispensing and tape solutions, such as complex process, low efficiency, high cost, and low reliability.

That is to say, sticking with glue requires steps such as sizing and baking, and the process is complicated and difficult to operate.

During the sizing process, there is no guarantee that the glue can be applied evenly, so some local parts may not have enough glue applied, while other parts may have too much glue applied, so that after the gluing step, mold may occur Leakage of light, formation of openings, and dirt due to uneven sizing

Moreover, the sticky water is easy to oxidize and age after being used for a period of time, thus losing the adhesion function and causing the parts to peel off

On the other hand, the glue material is not environmentally friendly

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