Effect of release agent on ultrasonic welding

15 Mar 2019

 Effect of release agent on ultrasonic welding The external release agent (zinc stearate, aluminum stearate, fluorocarbon, silicone) is usually sprayed onto the surface of the cavity to form a separate coating that facilitates removal of the part. The release agent may be transferred to the bonding surface, reducing the coefficient of friction of the material to be welded, affecting the heat generation of the bonding surface, hindering the fusion of the molten surface and forming a suitable connection. Silicone has the most harmful effects. The external release agent can sometimes be removed with a solvent. If an external release agent is necessary, the coatable, printable release agent is not transferred to the molded part, but the resin is prevented from wetting the mold surface. These levels of release agent have the least harmful effect on ultrasonic welding.

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Effect of additives on ultrasonic welding

09 Mar 2019

Additives, although improving the overall properties or formability of the base metal, often increase the difficulty of obtaining a high quality welded joint. Typical additives include: plasticizers, impact modifiers, flame retardants, colorants, lubricants, blowing agents, regrinds. Plasticizers, high temperature organic liquids or low temperature melts increase the flexibility and softness of the plastic and reduce its rigidity. They reduce the intermolecular attraction within the polymer and affect the transmission of vibrational energy. Highly plasticized materials such as vinyl are very poor ultrasonic energy transfer media. Plasticizers are often considered as internal additives, but they migrate to the surface over time, making ultrasonic welding almost impossible. Metal-containing plasticizers are more harmful than plasticizers approved by the US Food and Drug Administration (FDA). Impact modifiers such as rubber reduce the ability of materials to transmit ultrasonic vibrations...

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Effect of fillers and reinforcements on ultrasonic welding

01 Mar 2019

The performance of plastics affects the effect of ultrasonic welding. The ultrasonic welding properties of plastics depend on the plastics' ability to attenuate ultrasonic vibrations and the melting temperature as well as physical properties such as elastic modulus, impact resistance, friction coefficient and thermal conductivity. In general, the greater the hardness of a plastic product, the easier it is to weld. Plastics with high hardness tend to transmit ultrasonic energy, while soft plastics often attenuate energy before energy reaches the joint area. The hardness of plastic products will also vary with ambient temperature and humidity. Pigments, mold release agents, glass fillers and reinforcing fibers have a greater impact on it. Effect of fillers and reinforcements on ultrasonic welding Fillers (glass, talc, minerals) in thermoplastics can improve or inhibit ultrasonic welding. Materials such as calcium carbonate, kaolin, talc, aluminum hydroxide, organic fillers, silica, glass...

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Daily necessities welding machine

23 Feb 2019

The precision ultrasonic daily necessities plastic welding machine uses the ultrasonic plastic welding principle to weld the welding parts, and provides ultrasonic welding machines of 15KHZ, 20KHZ and 28KHZ according to the product requirements. Adopt advanced Japanese ultrasonic circuits. It is equipped with ultrasonic frequency compensation system and multiple ultrasonic protection programs. It is suitable for high-precision watertight, airtight and high-demand ultrasonic products. It has the advantages of firm welding surface, good air tightness and water tightness, high strength, beautiful appearance and environmental protection. Used for welding, riveting, forming, metal and plastic inlays of fusible plastic products. Widely used in electronics, electrical appliances, auto parts, plastic toys, stationery, daily necessities, handicrafts, cosmetics and other industries. The precision ultrasonic daily necessities plastic welding machine adopts the rectangular column design. The weldi...

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Plastic bottle cap ultrasonic welding machine application

15 Feb 2019

Plastic bottle cap ultrasonic welding machine is mainly used for welding of round plastic caps such as wine bottle caps, cosmetic caps, beverage caps, food caps, etc.; generally applicable to PP, PE, ABS, AS, PC, POM, PVC And PET products, such as: Toy industry: such as toy guns, water guns, telephones, key chains and general plastic toys Household items: gold soft brush, shower head, anti-counterfeit bottle cap, cosmetic bottle cap, coffee pot, washing machine, air dehumidifier, electric iron, electric kettle, vacuum cleaner and general container and other injection molded parts; Electronics industry: USB connector, Bluetooth, plastic case, mobile phone accessories, mobile phone case, battery case, nylon strap, calculator, audio case, charger, battery, business card holder, folder, photo album, computer keyboard, ink cartridge, Instrumentation plastic parts welding and plastic implanting; Automotive industry: manufacturing body plastic parts, automotive doors, automotive instrumentati...

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Plastic cap welding machine

28 Jan 2019

The plastic cap welding machine converts the current 15/20 Hz electric frequency into 20 KHz or 40 KHz electric energy high-frequency electric energy through a transistor function device, and supplies it to the converter. The converter converts electrical energy into mechanical vibrational energy for the ultrasonic wave, and the pressure regulating device is responsible for transmitting the converted mechanical energy to the welding head of the ultrasonic welding machine. The welding head is an acoustic device that transmits mechanical vibration energy directly to the product to be pressed. The vibration is transmitted to the bonding surface by the welding work piece. The friction generates heat to melt the plastic, and the vibration stops when the molten state reaches the interface. Maintaining pressure for a short period of time produces a strong molecular bond when the melt cures. The entire cycle is usually completed in less than a second, but the weld strength is close to a connec...

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