What is the ultrasonic plastic welding machine?
What is the ultrasonic plastic welding machine?
Ultrasonic plastic welder is short for ultrasonic plastic welding machine. Ultrasonic welding is a welding thermoplastic plastics technology, various kinds of thermoplastic rubber pieces of all can use ultrasonic welding processing, without having to add solvent, bonding agent or other AIDS. More than the advantage is to increase productivity, reduce costs, improve product quality and production safety.
Introduced of ultrasonic plastic welding machine
Ultrasonic plastic welding principle is 20 KHZ (or 15 KHZ) generated by the generator of high voltage, high frequency signal, can by changing system, the signal is converted to high-frequency mechanical vibration, and on the plastic workpiece, through the surface and inner of molecular friction and make the transfer to the interface temperature, when the temperature reaches the melting point of the workpiece itself, the workpiece interface rapidly melting, and then fill in the space between the interface and when the vibration stopped, workpiece cooling under certain pressure setting at the same time, to achieve perfect welding.
Ultrasonic plastic welding machine application methods
1.Welding method:
With ultrasonic high frequency vibration welding head under moderate pressure, make the two pieces of plastic joint surface produces friction heat and instantaneous melting joint, welding strength can be comparable to ontology, adopt the appropriate artifacts and reasonable interface design, can achieve watertight and airtight, and avoid using adjunct to the inconvenience of, efficient clean weld.
2. rivet weld method:
Ultrasound ultra high frequency vibration welding head, holding up plastic prominent clumps, make its instant hot melt rivet shape, make the material of different materials mechanical riveting together.
3. Preparetions:
Through the preaching of welding head and appropriate pressure, moment will metal parts (such as nuts, screws, etc.) into set aside into the plastic hole, fixed to a certain depth, no matter after the completion of tension and torsion were comparable with traditional die forming of strength, can be exempted from damaged injection mold and injection of the shortcomings of slow.
4.Forming:
Like rivet weld method, this method will be concave shape of the welding head pressure in the plastic outer ring, sonic welding hair surplus after ultra high frequency vibration will melt forming and plastic coated in metal objects so that it is fixed, and smooth and beautiful appearance, this method is used in electronics, fixed shape of horn, and lens fixed of cosmetics category.
5.Spot welding:
A.the 2 pieces of plastic point welding without welding line design in advance, to achieve fusion.
B. contrast to larger artifacts, not easy to design artifacts of the welding line point welding, the welding effect, can spot welding points at the same time.
6.Cutting the seal:
Using ultrasound instant vibration principle, for chemical fiber fabric cutting, its advantage incision smooth not crack, not drawing.
Influence factors of ultrasonic welding effect:
1. The plastic material
2. The points of design
3. School mode
4. The accuracy of the workpiece temperature of surrounding
5. Design of welding head
6. According to the amplitude of welding head
7. The base of the design
8. Contact surface or the design
9. The work content of shapes and sizes
10.The wall thickness and hand in the level
11. Cleaning and surface treatment (such as painting or plating)
12. The energy transmitted to the workpiece material
13. Different plastic blending material
14. Different damping factors, such as within fixture base or content block.