Introduction, characteristics, and applications of high-frequency machinery

High frequency machines, also known as high frequency machines or high frequency equipment, are industrial devices that use high-frequency electric fields to cause the molecules within plastics to oscillate and generate heat for the fusion of various products. The working principle of high frequency machines is based on the phenomenon of molecular polarization in dielectric materials under the influence of high-frequency electric fields, where molecules align according to the direction of the electric field. Due to the rapid change in direction of the high-frequency electric field, dielectric materials heat up due to dielectric loss. When the thermal energy reaches the melting point of the plastic products, welding and fusing processes occur, with uniform welding temperatures inside and outside, and both heating speed and temperature are controllable.

High frequency machines are mainly used for plastic thermal bonding and are one of the important devices in the plastic processing field. Their power typically ranges from 5-8KW, with upper pressure plate specifications of 400520mm and lower pressure plate specifications of 400600mm. The frequency of high frequency machines mainly adopts international industrial bands, such as 27.12MHz or 40.68MHz, complying with international standards to ensure minimal interference with external devices.

Features

High frequency machines have various features that make them widely applicable in the plastic processing field:

1. High efficiency: High frequency machines have powerful output power, and the oscillation frequency produced meets international industrial band standards. Through special electronic circuits, products can be fused in the shortest time possible, increasing product yield. High frequency machines use low-loss coaxial resonators, producing good output waveforms with extremely high quality factors and strong output for rapid fusing.

2. High sensitivity spark protection device: When sparks are generated during operation, high frequency machines can automatically cut off the high-frequency circuit to protect machine parts and objects from damage. At the same time, when current is too high, the equipment will automatically cut off high voltage to ensure the safety of oscillation tubes and rectifiers.

3. Stable frequency: High frequency machines are designed strictly according to international "Radio Interference Committee" (CISPR) regulations, equipped with frequency stabilizers and magnetic leakage suppressors to minimize interference with external devices.

4. Convenient adjustment: High frequency machines are equipped with a synchronizer for output power, making adjustments simple and convenient. Depending on the size and thickness of the product, the required oscillation current can be set to control the degree of fusion, ensuring uniformity in product bonding quality.

5. Safety protection: The equipment is equipped with over-voltage and over-current protection devices that can automatically cut off high voltage during abnormal operations to protect oscillation tubes and rectifiers while avoiding frequency drift caused by improper operation. In addition, the mechanical structure is special; each model has been specially designed and assembled with sufficient strength to handle any situation, ensuring safe use.

6. Versatility: High frequency machines can not only be used for plastic fusing and welding but can also be equipped with simple devices for hot stamping processing, suitable for various packaging bags, soft tote bags, etc.