The development of industry and commerce has led to the development of product connection technology, and the traditional connection methods of lock screws, instant glues and chemical solvents have become welding methods such as sound wave vibration conduction, hot plate direct fusion, and high frequency. When pursuing efficient production, industry and commerce also need to meet the needs of a green environment. At present, the welding technology that is more commonly used in the production of electronics industry is
, hot plate welding, and high frequency welding.
The difference between high-frequency welding and ultrasonic welding
Electromagnetic waves with frequencies greater than 100Khz are high-frequency waves, and sound waves with frequencies greater than 20 kHz are ultrasonic waves. The welding principle of the two is also different, high frequency is the use of high-frequency electromagnetic field so that the internal molecules of the material violently collide with each other to produce high temperature, to achieve welding and welding, while ultrasonic wave is the use of vibration friction principle to generate a lot of heat, to achieve welding and welding.
Advantages and disadvantages of ultrasonic welding
Ultrasonic welding machine is fast, welding and hardening can be completed in 0.4-1.0 seconds, and no harmful chemical reactions and toxicity will be generated. No chemicals or other solvents are used in the welding process, which is conducive to the improvement of the working environment and the recycling of plastics.
Its disadvantage is that below 15KHz, there will be noise, the upper mold is limited to the conduction area, and PP, PE, PA nylon and other toughness materials are not easy to weld.
Advantages and disadvantages of high-frequency welding
High-frequency welding is the use of positive and negative electrodes to produce welding effects, can weld large products, the disadvantage is that the material after welding is more likely to produce embrittlement phenomenon, and the equipment cost is higher, easy to produce electromagnetic interference and other shortcomings.