Features plastic lid welding process used: plastic lid is a special process for production made. In a plastic lid, and its raw material does not contain any toxic components, and, in use, will not cause any harm to the body. And the durability of the plastic lid is very good, the surface does not appear in the use of crack and crevice and splitting phenomenon, whereby the plastic lid for longer service life. Plastic lids child soldering machine will power through the ultrasonic transducer transformed into ultrasonic energy (ie frequency exceeds the threshold of human hearing frequency mechanical vibration energy), the energy is transmitted to the head by welding plastic parts, thousands of times per second ultrasonic frequency and amplitude of a certain piece of plastic joints after intense friction melted. After the vibration is stopped to maintain pressure on the workpiece so that the two short weldment molecular chaining solidification as one. Usually less than 1 second weld time, welding strength can be obtained with comparable body. The specific process is placed in a plastic lid welded intermediate mold and the bottom mold, when the mold is in contact with the lid, will carry ultrasonic energy to form a vibration friction, so that the contact surface of the lid to melt. When the mold to leave the lid, the lid will rapidly cooling molding, enabling the body or dissimilar plastic welding. Besides the plastic lid surface refinement, and has a certain aesthetic. And the surface of the plastic lid is not rough, bright color, uniform color throughout, and will not appear fading phenomenon in use. Source: www.hnxysl.com/news/16.html, reproduced, please indicate the source. [ZQ]