The principle of ultrasonic plastic welding machine, what is the principle of plastic ultrasonic wel

Ultrasonic welding has the advantages of fast speed, firm strength, and beautiful welding surface, which can replace glue and screws.

Working principle: The ultrasonic high-frequency vibration is used to make the joint surface of the welded plastic parts violently friction and melt. The resulting weld strength is comparable to that of the body.

Ultrasonic plastic welding machines are widely used in toys, plastics, stationery, home appliances, communications, daily use, packaging, clothing, medical equipment, electronic parts and other industries. Such as mobile phones, pens, lighters, irons, water guns, computers, ink cartridges, drums, car lights, mirrors, batteries, photo albums, business card holders, pencil cases, CD bags, folders, lunch boxes, electrical accessories, remote control cars, boats, computers, shoe materials, wind wheels, headphones, hair dryers, building blocks, chargers, plugs, sockets, kettles, knives, central locks, water cups, telescopes, **, trademarks, Velcro, etc.

Yiwu ultrasonic, ultrasonic plastic welding machine, Jinhua ultrasonic plastic. Toyo ultrasonic welding machine.

When the ultrasonic wave acts on the contact surface of the thermoplastic plastic, it will produce tens of thousands of high-frequency vibrations per second, and the high-frequency vibration that reaches a certain amplitude will transmit the ultrasonic energy to the welding area through the upper weldment, and the welding area is the intersection of the two welds with large acoustic resistance, so it will produce local high temperature. Due to the poor thermal conductivity of plastics, they can not be dissipated in time for a while, and they gather in the welding area, causing the contact surface of the two plastics to melt rapidly, and after adding a certain pressure, they are fused into one. When the ultrasonic wave stops working, let the pressure continue for a few seconds to solidify and form, so that a strong molecular chain is formed, and the welding strength can be close to the strength of the raw material.

Ultrasonic plastic weldingTechnology is widely used in medical, electrical appliances, consumables, packaging and other fields, the working principle is to convert alternating current into high-frequency and high-voltage signals through the electric box (ultrasonic generator), and then convert the signal into high-frequency mechanical vibration through transducers, amplifiers and welding heads, so as to achieve the purpose of converting electrical energy into mechanical energy, and finally the welding head acts on two plastic products that need to be welded, and one product presses the seam of the other product, so that the high-speed friction between the surface of the two products heats up, so as to quickly melt and then cool and form. Complete the welding between the plastics.

Ultrasonic welding machine for plasticsThe workflow can be divided into 5 phases:

1.Feeding: Place the plastic products to be welded on the feeding platform;

2.Feeding: Adjust the speed of the conveyor system according to the size of the product, the size of the mold and the welding needs;

3.Preheating: Turn on the power switch and let the welding machine run for 5 minutes without load, (it should be extended appropriately when the ambient temperature is low in winter);

4.Heat sealing and cutting: open the upper and lower molds to carry out hot pressing and cutting actions at the same time;

5.Cooling: Turn off the heating switch and let the device cool down to room temperature on its own;

6.Take out the finished product.

The principle of ultrasonic plastic welding is to generate a high-voltage and high-frequency signal of 20kHz (or 15kHz) by the generator, and convert the signal into high-frequency mechanical vibration through the transducer system, which is added to the workpiece of plastic products, and the temperature transmitted to the interface rises through the friction between the surface of the workpiece and between the molecules, when the temperature reaches the melting point of the workpiece itself, the workpiece interface melts rapidly, and then fills the gap between the interfaces, when the vibration stops, the workpiece is cooled and shaped under a certain pressure at the same time, and the perfect welding is achieved.

Fusion welding method. 1. Welding method.

Take ultrasound. The welding strength is comparable to that of the body, and the suitable workpiece and reasonable interface design can achieve watertight and airtight, and avoid the inconvenience caused by the use of auxiliary products, so as to achieve efficient and clean welding.

2. Riveting welding method.

The ultrasonic ultra-high frequency vibrating sonotrode is pressed against the protruding tip of the plastic product, causing it to heat up instantly.

It is fused into the shape of rivets to mechanically rivet materials of different materials.

3. Planting. With the propagation of the sonotrode and the appropriate pressure, the metal parts (such as nuts, screws, etc.) are instantly squeezed into the reserved plastic holes and fixed at a certain depth, and the strength of the traditional mold can be comparable to the strength of the traditional mold after completion, which can avoid the shortcomings of the injection mold damage and slow injection.

Ultrasonic welding machines are mainly used for thermoplastics.

Compared with other traditional processes (such as gluing, electric ironing or screw fastening, etc.), the secondary connection has significant advantages such as high production efficiency, welding, environmental protection and energy saving.

Ultrasonic plastic welding equipment is widely used in medical equipment, packaging, auto parts, fishing gear and other industries, such as disposable infusion filters and plasma separation cups, ziplock bags, plastic wine bottle caps, dishwashers.

Welding of water wheels, plastic toys, car lights, plastic fake baits, charger housings and mobile phone slings.

The working principle of the ultrasonic welding machine is to convert the mains power into a high-frequency and high-voltage signal through the power supply box, and then convert the signal into high-frequency mechanical vibration through the transducer, and add it to the plastic products, so that the plastic products produce high-speed friction, and the welding can be completed after the pressure reaches the melting point.

Ultrasonic welding machine can be divided into automatic welding machine, semi-automatic ultrasonic welding machine, manual welding machine according to the level of automation, for modern enterprises, the higher the level of automation, the more conducive to the production of enterprise assembly line, so the use of automatic welding machine is a trend in the future of enterprises.

The principle of ultrasonic welding is to use high-frequency vibration waves to transmit to the surfaces of two objects to be welded, and under pressure, the surfaces of the two objects rub against each other to form a fusion between molecular layers.

Ultrasonic welding is the conversion of 50 to 60 Hz current into or 40kHz of electrical energy through an ultrasonic generator. The converted high-frequency electrical energy is again converted into mechanical motion of the same frequency by means of a transducer, which is then transmitted to the sonotrode via a set of amplitude-changing rod devices that can change the amplitude. The sonotrode transfers the received vibration energy to the joint of the workpiece to be welded, where the vibration energy is converted into heat by friction to melt the plastic.

Ultrasound can be used not only to weld hard thermoplastics, but also to process fabrics and films.

The main components of an ultrasonic welding system include ultrasonic generator, transducer, luffing rod, sonotroduct, tool, tool, and frame.