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Detailed solution of ultrasonic plastic bonding process

发布者:灵科超声波 发布时间:2018/7/16
The process of ultrasonic plastic bonding is mainly through high frequency electric energy conversion to high frequency mechanical vibration. Through welding head, the mechanical vibration and pressure are applied to two workpiece contact surfaces to friction each other to produce heat solution. After the contact surface of the workpiece is fused, a stable molecular combination is formed, and the workpiece is rapidly cooled and the workpiece is cooled and stabilized after the mechanical vibration is stopped. Here, the strength of the joint is in accordance with the work piece. So, what about the process of plastic dissolving? Let's decompose it in detail. If you don't understand it, you can consult with us.

1. put the two plastic parts that need to be welded into the bottom mould to confirm the correct position of the fusion interface.

The 2. pressure pump drives the welding head to contact with the workpiece.

3. the welding head applies the set down pressure on the workpiece, so that the contact surface of the upper and lower workpieces can be attached to a compact state.

4. the power supply box will turn into the high frequency and high voltage signal, and then convert the signal into high frequency mechanical vibration through the transducer system, and the welding head is added to the workpiece through the welding head. The contact surface of the two plastic workpiece will produce high-speed friction. When the temperature rises to the melting point of the plastic, the contact surface is melted quickly, the welding head stops the high-frequency vibration and the workpiece is welding head. Under the pressure of cooling, the plastic workpiece is perfectly welded.

The set time of melting is 20000 times (20KHz) or 35000 times per second. (35KHz) the distance of an even vertical vibration, the distance back and forth of the welding head of the shore - one we call the amplitude, about 1/1000 English hours (micro not) the mechanical vibration can be guided by the precise workpiece design to the joint between the two workpiece. The joint of the two plastic workpieces is due to the heat of the intermolecular surface, when the joint surface temperature is to the melting point of the plastic. The plastic began to melt and move. After the high vibration stopped, the melt began to cool.

1. put the workpiece in the bottom die. Put parts into nest

The two thermoplastic workpieces that have been assembled are placed in a well supported bottom mold.

2. welding head contact with the workpiece Hofrecdntte trasonics

A titanium or aluminum element is the welding head, which is driven down by the transmission mechanism and contacts with the upper edge of the plastic workpiece.

3. ultrasonic welding head applied pressure Pressure applied

An adjustable and controlled pressure is applied to the workpiece so that the two workpiece can be tightly matched with the bottom mold.

4. weld time Weld time