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Plastic laser welding is also called laser penetration welding, the basic principle is: the upper and lower two plastic workpieces placed in the fixture and apply sufficient pressure, the laser beam penetrates the upper layer of plastic, the lower layer of plastic surface to absorb the laser energy and melt the plastic, melting plastic in the welding pressure under the action of the welding fusion, cooling after the formation of a solid weld.
Due to the advantageous characteristics of the plastic laser welding process itself, it is mainly used in the field of precision plastic electronic components, aseptic medical field, food and drug field, automotive field and other high-tech fields.
As the laser welding can be flexible transmission to the precision devices, the most widely used in the field of precision plastic electronic components, such as cell phone parts, mice, connectors, switches, sensors and so on.
In the automotive field of plastic parts on the assembly line processing can be seen everywhere. For example, automatic door and window switches, injector nozzles, transmission brackets and so on. For those very complex structure of the three-dimensional geometry of plastic parts welding, can also use laser welding technology, can meet the 360 ° no dead angle welding process characteristics.
1. Laser plastic welding belongs to non-contact welding, the welding process will not produce dust or flying edge and other undesirable phenomena, to maintain a clean working environment, suitable for use in health and safety of the medical and food industries.
2. The laser can regulate the beam size size and change the shape through beam shaping, which is convenient to control the size of heat-affected zone.
3. The welding speed of laser plastic welding is fast, the weld seam has high strength, no flying edge, no residue, can ensure the good appearance of the welded area.
4. Laser plastic welding parts are precise and firm, airtight, watertight, can greatly reduce thermal stress and vibration stress, suitable for precision electronic components and easy to damage the device welding.
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Tianhong Laser Welding Products Catalog.pdf
Acrylic plastics (such as PMMA):For acrylic plastics, continuous wave laser welding is usually used.This method can achieve welding by locally heating and melting the plastic surface, forming a uniform, transparent weld joint.
Polycarbonate plastics (such as PC):For polycarbonate plastics, commonly used laser welding methods include transparent laser welding and through laser welding.Transparent laser welding usually uses infrared laser and is suitable for situations where higher welding depth and quality are required;Transparent laser welding usually uses infrared laser and is suitable for situations where higher welding depth and quality are required.
Polystyrene plastics (such as PS):For polystyrene plastics, pulse laser welding is generally used.Pulse laser can provide enough energy in a short time to achieve local heating and melting, which is suitable for situations where high precision is required for the welding area.
Polymethyl methacrylate plastics (such as PMMA):For polymethyl methacrylate plastics, plasma laser welding is usually used.Plasma laser welding can provide a high-energy laser beam to achieve rapid melting and mixing, and is suitable for situations where high welding depth and welding quality are required.
