[untitled] Application of laser welding in medical treatment

In the field of biological and medical engineering , The application of laser technology is becoming more and more extensive , And more and more directly applied to the treatment and diagnosis of human body , And the manufacture of medical devices and implants . Of course , The laser system with high reliability and powerful function is also well used in the connection of plastic components of medical devices .

that , What are the functions of these laser devices ？ How they work ？

Plastic is the ideal material for many devices and their components ： They are easy to shape , Easy to clean , The material itself is light , Even high temperature sterilization is required . The connection of two injection molded plastic parts can be made by chemical means 、 Thermal effect or mechanical technology , This depends on the later application of the product and the different requirements for visual aesthetics . However , Connecting plastic parts in harsh or sensitive conditions is a huge challenge . Due to various factors , The properties of surrounding materials may change , When the connection quality of plastic parts is very high , The joints must be very strong and clean , Without dust and chemicals , The advantages of laser plastic welding technology are very prominent . Laser welding technology relies on high reliability , high velocity , High precision and flexible machining 、 Beautiful weld , It is an important processing method in the field of medical engineering .

 

Laser plastic welding

 

The principle of laser plastic welding ：  The laser beam penetrates the upper transparent material , Reach the lower light absorbing material surface , Convert laser light energy into heat energy , Melt the surface , At the same time, heat is also conducted in a way , It is transferred from the bottom surface to the contact surface of the upper transparent workpiece crimped with it , Make it melt , So as to realize laser hot melt welding . This has been verified by various quality control methods in the welding process . After the narrow weld cools , It will be consistent with the strength of the material itself .

chart 1： Schematic diagram of laser plastic welding

 

The necessary condition for a successful laser plastic welding process is that the two parts are laser transparent plastic and laser light absorbing material , This constitutes a variety of possibilities .

 

chart 2： Phase melting characteristics of laser welded plastics

 

Laser plastic welding can produce a weld with almost the same strength as the material itself without debris or dust , No chemicals or other additives need to be introduced . The cleanliness of the whole processing process is high . The weld is from a few tenths of a millimeter to a few millimeters and has good sealing . Especially when you need to be subtle 、 Beautiful weld structure , Laser welding is undoubtedly the most ideal technology .

 

This technology has been applied in many fields of medical engineering ： for example , Welding the shell of electronic components such as insulin device or pacemaker . A cylindrical part of a conduit or pin , It can also be welded accurately and reliably by laser , Cartridges and microfluidics for diagnostic procedures can also be easily handled . Another advantage is that the weld has the same biocompatibility as the material itself . The components of plastic valves under high pressure can also be welded well by laser , Very stable . Based on numerical control and precise laser beam , The system can easily weld any geometric shape .

chart 3： Laser welded shell ： Insulin pump welding

 

In addition to the welding between light transmitting and light absorbing materials described above , Transparent welding technology can also be used to connect two transparent welding parts through a special laser source . Especially when laser absorbing plastic parts are not allowed to add any additives or must be evaluated by optical analysis after welding , This welding method is particularly important .

 

chart 4： Laser welded microfluidic sensor , Forming channels of arbitrary geometry 、 No additives or particles , Form a perfect diagnosis .

Conclusion

Advantages of laser plastic welding technology , It is the preferred process for connecting plastic parts in the precision field . clean , No burr , High strength , Reliable welding of plastic parts will not change the material properties during production . Due to the wide variety of welding processes available , Therefore, the technology can be used to process various products ： From narrow conduit to pressure valve to large electronic device shell . Full traceability ensures the high reliability of the production process , This makes laser plastic welding the first choice in many applications of medical engineering .