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Ultrasonic welding principle
With the rapid development of material industry, The light weight, small friction, corrosion resistance, easy processing of plastic and metal composite material application more and more get people's attention.All kinds of plastic products not only penetrated into every field of People's Daily lives, at the same time can be widely used in aerospace, shipbuilding, automobiles, electrical appliances, toys, electronics, textile and other industries.
Principle of ultrasonic plastic welding is 20 KHZ (or 15 KHZ) generated by the generator of high voltage, high frequency signal, can by changing the system, the signal is converted to high-frequency mechanical vibration, and on the plastic workpiece, through the workpiece surface and the friction between the molecular 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, when the shaking stops, workpiece cooling under certain pressure setting at the same time, to achieve perfect welding.
Ultrasonic plastic welding machine is a kind of universal welding injection of the workpiece, as well as plastic, paper and aluminum composite membrane, such as plastic hose seals the tail.According to different processing object and welding, welding, welding and other processing methods.
15 KHZ ultrasonic plastic welding machine, new type of welding with a softer PE, PP material, and large diameter, the length of the long plastic welding parts, has a unique effect, can meet the needs of a variety of products, production efficiency and product class contribution for users.
Ultrasonic machining process
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1 ultrasonic welding:
With ultrasonic high frequency vibration welding head under moderate pressure, make the combination of the two pieces of plastic surface produces friction heat and melting joint moment, weld strength can be comparable to ontology, adopt the appropriate artifacts and reasonable interface design, can achieve watertight and airtight, and avoid using supplements such inconvenience, efficient clean welding.
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2 Rivet welding
The ultrasonic high frequency vibration welding head, pressure plastic prominent clumps, make its instant hot melt rivet shape, make the material of different materials mechanical riveting together.
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3 Inlay
By the conduction of welding head and appropriate pressure, moment to metal parts (such as nuts, screws, etc.) into reserved plastic hole, fixed to a certain depth, after the completion of both 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.
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4 Forming:
This method and the welding method, the concave shape of the welding head pressure in the plastic outer ring, after sending the high-frequency vibration of ultrasonic welding head to plastic forming and covered in molten metal objects to be fixed, and is smooth and beautiful appearance, this method is used in the electronics, the horn of a fixed shape, and cosmetics of lens fixed, etc.
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Forming
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5 Spot welding
A, two pieces of plastic equinoctial welding without welding line design in advance, to achieve fusion.
B, contrast to larger workpiece and is not easy to design point of welding welding line of the workpiece, and reach the effect of welding, spot welding points at the same time.
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6 Cutting & Sealing
By using the principle of the ultrasonic instantly send vibration, the chemical fiber fabric cutting, the incision bright and clean and no crack, no drawing
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Welding face:
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Material
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Weld(close)
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Weld(far)
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Rivet
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Inlay
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Spot
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ABS
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E
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G
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E
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E
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E
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ABS-Makrolon
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E-G
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G
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G
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E-G
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E
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crylic
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G
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G-F
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F
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G
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E
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EAA
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G
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F
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G
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G
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G
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acrylo-nitrile-butadiene-strene
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G
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F
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G
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G
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G
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CA CAB CAP
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F-P
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P
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G
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G
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F-P
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PAI
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G
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F
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Makrolon
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G
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G
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G-F
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G
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G
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polystyrene
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E
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E
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F
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G-E
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E
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modified rubber
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G
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G-F
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E
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E
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E
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polysulfone
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G
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F
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G-F
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G
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F
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PVC
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F-P
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P
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G
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E
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G-F
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SAN
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E
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E
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F
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G
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G-F
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polyformaldehyde
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G
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F
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G-F
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G
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F
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fluoropolymer
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P
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nylon
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G
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F
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G-F
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G
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F
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PBT
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G
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F
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F
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G
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P
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HDPE
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F-P
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P
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G-F
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G
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G
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PMP
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F
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F-P
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G-F
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G
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G
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PPS
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G
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F
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P
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G
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E
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PE
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F
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P
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E
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G
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E
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Note: 1、E=BEST G=GOOD F=NORMAL P=BAD
2、In 6.4mm close weld，out 6.4mm far weld
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