976nm semiconductor lasers will become plastic welding weapons

　　Plastic is widely used in various industrial collar cities, and the demand for industrial production on plastic has gradually approached or even exceeded steel materials. Especially in industries such as electronic manufacturing, medical, food packaging, and automobiles, plastic has become one of the indispensable key materials. The precise and high -intensity connection needs of various plastic parts in production are also used in large amounts of plastic. And increasingly.

　　Various plastic parts through laser welding case icons

　　The choice of plastic parts connection process has an important impact on the final application of plastic products. Traditional plastic connection processes include thread connection, adhesive connection, insertion connection, pressing connection, etc., as well as melting connections represented by hot plate welding and ultrasonic welding. The advantages of these combination methods are simple operation, convenient connection, strong applicability but also obvious disadvantages. For example, there are specific shape requirements, the connection strength is relatively low, in the face of complex and irregular graphics such as three -dimensional geometric shapes, hollow hollows, and large zero zero zero zero Components, even plastic parts that require certain requirements for gas tightness after connection, which can operate small and low efficiency.

　　At the same time, in the modern industrial field of pursuing product innovation and quality improvement, the requirements for welding quality are getting higher and higher. With the development of laser technology, it has also promoted the gradual application of plastic welding technology. Laser plastic welding technology has become an important development direction. It is gradually becoming a new favorite of connecting materials. welding.

　　Principles of laser plastic welding

　　Laser plastic welding, also known as laser light transmittance, requires high light transmission rate of upper plastic workpieces, and the lower workpiece can absorb laser energy. Therefore, the current mainstream welding objects are "transparent plastic+black plastic" and "transparent plastic+transparent plastic". The combination method.

　　Because most of the transparent plastics have a high light transmission rate of 800nm ~ 1100nm band, and the absorption is small, based on this Songsheng Optoelectronics launched a 976nm semiconductor laser, it integrates a high -precision control system in the compact structure, which is convenient to use. It uses advanced semiconductor laser technology to output near -infrared laser with a wavelength of 976nm. The laser energy of this wavelength can penetrate transparent or translucent plastic surfaces, absorbed and converted into thermal energy by the lower layer, and can be used to implement precise and efficient plastic welding. This laser has high electro -light conversion efficiency, providing continuous laser output, and the power level can be selected according to the needs of the welding process. The range can be adjusted from hundreds of tiles to hundreds of watts. Essence

　　Songsheng Optoelectronics 976 Water Cool/Cold Hennatta Semiconductor Laser icon icon

　　In addition to the laser body, the actual application of laser plastic welding also needs to be paired with welding ting and welded fixture. When using the 976nm semiconductor laser for plastic welding, first assemble the two parts of welding parts with a fixture. The basic principle of welding is that the laser beam of the welded head output through the upper layer transparent plastic, which is precisely projected into the lower plastic parts under the control of the program control to the lower plastic parts. The welding area to be welded; the lower plastic melted after absorbing the highly focused laser energy, and the upper and lower layers of plastic parts were fully melted and combined. With a certain external force, the weld was formed after cooling, and the final welding was completed to complete the final welding. Essence

　　Songsheng Optoelectronics has independently developed 976nm constant temperature semiconductor lasers dedicated to the field of laser tin welding plastic welding. The PID algorithm response is fast (15 μs), and it is not easy to burn welding joints. The built -in temperature closed -loop feedback system of the laser is monitored and regulated in real time through the infrared sensor to welded the temperature of the processing point at a set temperature at a set temperature. According to customer needs, there are air -cooled/water -cooled options. The output power is 10W, 100W, 200W, 300W, 500W.

　　At the same time, with the help of a dedicated control system, accurate heat control and local heating in the process of transmitting welding can be achieved, the welding quality can be consistent, avoid adverse effects on the surrounding materials. Welding of precision plastic parts.

　　PC+ABS Plastic Welding Test

　　976nm coaxial temperature measurement single focuses on welding tide icon

　　In actual operation, in order to ensure the quality and sufficient melting depth of the weld, the relationship between the welding speed and the laser power is needed to comprehensively consider the optimal process window.

　　Test it with welding PC and ABS plastic. First, place the two plastic parts on the vehicle and put it, and use a fixture to apply pressure to clamp.

　　Adjust the laser output power to 300W, and the welding speed is set to 20mm/s (up to 10000mm/s). The two layers of plastic welding is successful, the welds are uniform, the weld width is moderate, the sealingability is good, and the tested test intensity reaches the strength of the tested test. Require.

　　The laser output power remains 300W unchanged. When the welding speed is reduced to 10mm/s, the two layers of plastic welding is successfully welded, the welds are uniform, the welds are wide, and the sealing properties are good; however The decomposition of some materials is reduced to reduce the welding intensity.

　　When the power is adjusted to 200W and the welding speed is set to 20mm/s, the weld width is moderate, the fusion is good, the sealability is good, and the intensity of welding when the tension test intensity is lower than the high power.

　　Laser welding advantage

　　The combination of laser welding and melting is similar, but the advantages of the former are more obvious:

　　Integrated mirror scanning plastic welding processing system

　　First of all, high accuracy, small laser light spots and high uniformity, can accurately accurately accurately accurately accurate welding parts, can quickly convert laser energy into the energy required for welding, achieve precision welding, and greatly improve the welding efficiency extent Essence Combined with professional -designed welding heads, it can ensure that laser energy is fully absorbed in the welded area to ensure the strength of the weld.

　　Secondly, the heat -influencing area is small, which can avoid heat damage to the plastic meter during the welding process, and maintain the transparency and smoothness of the material. This makes the product after light transmitting weld not only maintain the original appearance characteristics, but also enhances the stability of the structure.

　　Third, the contradiction between the traditional welding method between welding speed and welding quality can be solved, and large -area welding can be completed in a short period of time, which greatly improves production efficiency. A welding operation that originally needed for a few hours can be completed easily in just a few minutes or tens of minutes, saving a lot of time and cost.

　　In addition, non -contact welding operations avoid the mechanical stress and vibration generated by the traditional connection method, protect the integrity of the plastic surface, and ensure the precision of the weld. , Meet high -standard product requirements such as waterproof and dustproof.

　　Summary

　　At present, the 976nm semiconductor laser has shown a strong market potential and application value. It is a weapon for plastic welding. Especially in terms of automotive plastic welding, it brings efficient and stable welding effects. In the interior welding, it can be used for welding of the dashboard, center console, etc. In the welding of the exterior decoration, it can be easily welded in the door handlebars, lights, etc. It can be used for plastic welding of many electronic components, which significantly improves the connection strength and sealing, and ensures the stability and reliability of each component. In the future, with the continuous development of functions, 976nm products will usher in a wider range of applications.