The welding process includes the principle of plastic rotary welding machines as well as plastic ult

The ultrasonic welding device converts the current 50 60hz electrical frequency into 20kHz or 40kHz high-frequency electrical energy through a transistor functional device, and gives it to the converter. The converter converts the electrical energy into the mechanical vibration energy used for ultrasonic waves, and the voltage regulating device is responsible for transmitting the converted mechanical energy to the sonotrode of the ultrasonic welding machine. The sonotrode is an acoustic device that transmits mechanical vibration energy directly to the product to be pressed.

Vibration is transmitted to the adhesive surface through the welding workpiece vibration friction to generate heat energy to melt the plastic, the vibration will stop when the molten state material reaches its interface, and the short-term pressure can make the melt produce a strong molecular bond when the adhesive surface is cured, the whole cycle is usually completed in less than a second, but its welding strength is close to a piece of connected material!

Rotary friction plastic welding machines are generally used to weld two round thermoplastic workpieces. During welding, one workpiece is fixed on the bed die and the other workpiece undergoes a rotational motion on the surface of the workpiece being fixed. Since there is a certain amount of pressure acting on the two workpieces, the heat generated by the friction between the workpieces can melt the contact surfaces of the two workpieces and form a forbidden and closed bond.

Among them, the positioning rotary fusion is to rotate at a set time and stop at the set position instantaneously to become a permanent fusion.

Fusion welding application method of ultrasound.

1. Welding method:

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.

Second, riveting welding method:

The ultrasonic ultra-high frequency vibrating welding head is pressed against the protruding tip of the plastic product, so that it instantly heats up and melts into the shape of a rivet, so that the materials of different materials are mechanically riveted together.

3. Implantation:

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.

Fourth, molding:

This method is similar to the riveting welding method, the concave sonotrode is pressed on the outer ring of the plastic, and the sonotrode emits ultrasonic ultra-high frequency vibration to melt the plastic into shape and wrap it on the metal object to fix it, and the appearance is smooth and beautiful.

5. Spot welding:

a. The two-piece plastic split welding does not need to be pre-designed to achieve the purpose of welding.

b. For relatively large workpieces, the workpieces that are not easy to design welding wires are welded at different points, and the welding effect can be achieved at the same time.

6. Cutting and sealing:

Using the working principle of ultrasonic instantaneous vibration to cut chemical fiber fabrics, the advantages of which are smooth and clean, no cracking and no drawing.

The above are several uses of ultrasonic welding machine in plastic welding

Ultrasonic plastic welding can be divided into four process methods: ultrasonic welding, ultrasonic riveting, ultrasonic spot welding and ultrasonic implantation according to the connection method.

Ultrasonic welding: On the welding equipment, by adjusting the pressure, amplitude and other parameters, ensure that the sonotrode contacts the welding surface and applies pressure, the sonotrode produces ultrasonic high-frequency, the upper workpiece vibrates and generates heat, and the lower workpiece is the part that accepts the pressure, which is placed in the bottom mold and does not move, and the three in one complete the workpiece fusion, and then the sonotrode stops vibrating, maintains the pressure, and cools the melting position to achieve the purpose of perfect welding.

Ultrasonic riveting: The working principle is similar to welding, the way is to penetrate a plastic rivet into another material, the welding surface of the welding head is designed into a rivet coating shape, and the plastic rivet is welded and coated on another material by high-frequency vibration heat generation.

Ultrasonic spot welding: works similarly to welding, in which the sonotrode is designed in the shape of a pistol in which one end of a plastic workpiece is penetrated and fused to the plane of another plastic workpiece. The advantage is that the welded surface does not require any special design, tongue tenon and rivet, and is often used for large flat workpieces.

Ultrasonic embedding: The working principle is similar to welding, the method is to place the embedded metal nail in the plastic workpiece, and then the welding head touches the metal nail and vibrates to generate heat, so that the nail is embedded and fixed in the plastic workpiece.

Compared with other welding technologies, ultrasonic welding has incomparable characteristics.

1.No smoke and dust during welding, environmental protection and energy saving;

2.It can achieve seamless welding, waterproof and airproof sealing;

3.By setting parameters and adjusting equipment, it is also possible to reduce production time and increase cost-effectiveness.

1. Energy saving and environmental protection.

When the plastic parts are processed, there will be no smoke and dust, no peculiar smell, and no pollution to the working environment.

2. High production efficiency.

The processing time of a single plastic part is only 3 seconds, and there is no need to keep it dry under pressure.

3. Simple operation.

Operators do not need special training, they only need to press the button + pick and place parts.

4. Low production cost.

The ultrasonic plastic welding process processes only ultrasonic molds for the wearing parts, and the service life of the molds is 500,000 times, and the power consumption is low, with a power consumption of 6 ° days.

5. High versatility.

Different products only need to customize special ultrasonic molds to enhance equipment utilization.

6. High welding quality.

Ultrasonic welding can achieve seamless welding, and water and air tightness can be guaranteed.

7. High security.

The ultrasonic plastic welding machine is controlled by two buttons, and the safety of operation is guaranteed, and a foot switch can be installed in special cases.

8. High product consistency.

The equipment is controlled by the cylinder, and after all welding parameters are set, the welded product has high consistency and low rejection rate.

9. The equipment is easy to install.

It only needs to be turned on with electricity and gas, and it can be processed and produced.

10. It is easy to realize automation.

Ultrasonic welding equipment with output and input signals, only need to be connected with the automation equipment, and it is easy to realize the automation of the equipment.

The working principle of ultrasonic plastic welding machine is that when the ultrasonic wave acts on the thermoplastic plastic contact surface, 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, because the welding area is the intersection of the two weldings with large acoustic resistance, so it will produce local high temperature.

Due to the poor thermal conductivity of the plastic, it can not be dissipated in time for a while, and it gathers in the welding area, causing the contact surface of the two plastics to melt rapidly, and after adding a certain pressure, it is 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.

In addition to knowing how an ultrasonic plastic welding machine works, it is also important to choose a good ultrasonic plastic welding machine. The quality of ultrasonic plastic welding machine depends on the amplitude of the transducer welding head, the applied pressure and the welding time, the welding time and the pressure of the sonotrode can be adjusted, and the amplitude is determined by the transducer and the amplitude rod. There is a suitable value for the interaction of these three quantities, and when the energy exceeds the appropriate value, the melting amount of the plastic is large, and the weld is easy to deform; If the energy is small, it is not easy to weld, and the pressure applied should not be too large.

This optimal pressure is the product of the side length of the welded part and the optimal pressure per 1mm of the edge.

The theory of ultrasonic plastic welding is as follows: the principle of ultrasonic spot welding is to generate a high-voltage and high-frequency signal of 15 kHz-100kHz by the generator, and convert the signal into high-frequency mechanical vibration through the transducer system, and transmit the energy to the plastic workpiece by virtue of the sonotrod, so that the internal molecules produce intense friction and heat, when the temperature reaches the melting point of the workpiece itself, the workpiece interface will quickly melt and be cooled and formed under pressure while the vibration stops, so as to achieve perfect welding. Applications:

Riveting, spot welding, embossing, folder positioning and other processes of plastic hardware. Features: 1 Small size, easy to work, does not take up space.

2 The frequency is 15 kHz-100kHz. 3. The transducer adopts the original transducer. 4. Automatic frequency tracking, easy to adjust.

There are various sizes of ultrasonic transducer buckles: 305806 858 of nine figures).

Applicable examples: toy industry, stationery industry, home appliance industry, electronics industry, food industry, communication industry, transportation industry, etc.

Example of ultrasonic welding:

Daily necessities industry: powder boxes, cosmetic mirrors, hair combs, lock rings, thermos cups, sealed containers, cruet bottles, water pipe joints, handles, etc

Bottle caps, food containers...Wait.

Toy industry: all kinds of ball toys, stationery, water guns, plastic gifts, ** toys, and all kinds of plastic toys...Wait.

Electrical industry: electronic clocks, steam irons, vacuum cleaners, computer keyboards, electric fans, batteries...Wait.

Automobile manufacturing industry: turn signals, rear-view mirrors, all kinds of plastic products...Wait.

1. One end of the cable is connected to the output control cable connector on the vibrating cylinder, and the other end is connected to the output control cable socket on the back of the electric box, and tightened.

2. Wipe the connecting surface of the sonotrode clean, connect it to the transducer of the vibrating cylinder, and lock it with a wrench. Note: When connecting, it is necessary to ensure that the two connection surfaces between the sonotrode and the transducer are in agreement and locked.

Do not cause damage to the machine due to the phenomenon that the connecting screws are too long or the slippery teeth cannot be locked, otherwise the sound wave transmission will be poor.

3. When loading and unloading the welding head, two wrenches must be used to clamp the welding and transducer respectively, and only one part of the clamp must not be locked or loaded and unloaded, so as not to cause damage to the portable vibrating cylinder.

4. After the check point is properly installed, plug the power cord socket into the external power socket and pull the power switch, then the power indicator light will be on.

5. Gently press the sonic control switch, and then you can hear the "squeak" sound of the welder when the sound wave is transmitted to the sonotrode head, indicating that the machine is working normally and can be put into use.

6. When the machine is working abnormally, do not disassemble the equipment without permission, please notify the supplier or send the equipment to the manufacturer for inspection and maintenance.

Ultrasonic welding is a quick, clean, and effective assembly process. It is used to assemble and process thermoplastic parts, and the following methods for synthetic components. Bonding between plastic products and metal fittings, bonding between plastic products and metal fittings and other non-plastic treatments that are currently being used!

It replaces solvents, viscose, mechanical, robust and other bonding processes and is an advanced assembly technology! Ultrasonic welding not only has the function of understanding the assembly, but also has the sealing effect of moisture-proof and waterproof. Ultrasonic welding is to convert the electric frequency into high-frequency electrical energy through an electric metal body device, which is converted into mechanical vibration energy for ultrasonic through the converter, and the vibration is transmitted to the adhesive surface through the welding workpiece to vibrate and rub to produce heat energy to melt the plastic, and the vibration will stop when the molten state material reaches its interface, and the vibration energy is transmitted from the welding head to the workpiece, and the heat generated by the friction between the workpieces melts the welded surface of the workpiece, so as to weld into one.

Langtaosa has a professional technical service team to provide customers with the highest quality, safe, environmentally friendly and stable customization and slicing services; At the same time, we provide you with the most suitable protective film to reduce costs and achieve a win-win goal. Whether you encounter all the problems in the proofing process or in the production process, there are professional and technical personnel to serve you, and at the same time cooperate with SF Logistics to improve the after-sales service system and professional logistics and transportation system; At present, all products have passed RoHS, halogen, REACH and other environmental protection tests! Let you buy at ease and use comfortably!