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Common welding methods for ultrasonic welding

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Common welding methods for ultrasonic welding

 

Ultrasonic welding

 

The welding head (HORN) vibrating at ultrasonic ultra-high frequency makes the frictional heat of the joint surfaces of the two plastics melt under a moderate pressure, and the welding strength can be compared with the body, using suitable workpieces and reasonable interface design. Watertight and airtight can be achieved, and the inconvenience caused by the use of auxiliary materials can be eliminated, and efficient and clean welding can be realized.

 

The design of a typical ultrasonic weld surface must have the following two functions:

1. The design of the tongue is convenient for alignment during the welding cycle.

2, the wire design is slender, but there must be enough meltable material to fuse the welding surface.

 

The specific design method depends on which workpiece equipment is applied to the welding. The parameters such as welding pressure and amplitude can be adjusted to ensure that the ultrasonic welding head can contact the welding surface and apply pressure. The lower part of the workpiece is subjected to the pressure part and is placed in the bottom mold. The welding head generates high-frequency ultrasonic waves, which causes the workpiece to generate heat and vibration, so that it can be fused with the lower workpiece. After the welding head stops vibrating, the pressure is maintained, and the melting position is cooled and formed. The entire soldering time is mostly less than one second.

 

Ultrasonic riveting

 

The welding head (HORN) of the ultrasonic ultra-high frequency vibration is pressed against the tip of the plastic product, so that it is instantaneously heated and melted into a rivet shape, and the metal object is riveted and fixed.

 

Ultrasonic spot welding

 

When two pieces of plastic are to be welded, due to the condition of the welded material, the fuse line cannot be opened, and the spot welding can be used for welding. The principle is to use ultrasonic waves to the front end of the welding head, and to pass through the upper plate to the lower plate to achieve the effect of welding. At the same time, multiple points can be spot welded to improve work efficiency.

 

Ultrasound removal

 

Ultrasonic high-speed vibration welding head cuts out the sharp edges of the formed plastic parts, and cuts off the injection inlet, so that the plastic originals are separated from the injection flow path in an instant, eliminating the need for manual cutting. The advantages of the cut are smooth and not cracked. Suitable materials for ultrasonic ablation are ABS, PS, acrylic, PC, plastic steel, etc. If it is too soft or elastic, it is not suitable for ultrasonic ablation. (The plastic material just did not work well before it was cooled)

Pub Time : 2019-08-21 16:45:57 >> News list
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