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WELDING MACHINE

ANS
  1. Power ultrasonic: The application includes welding, crushing, cleaning, emulsification, etc. It only transmits power for functional output and does not accept feedback signals.
  2. Detection ultrasound: The ultrasound used in this method is mostly used for medical examinations, assisting medical diagnosis and treatment, and the frequency is usually 2M~15MHz
  • Ultrasonic welding machine
  • Can be used for welding (fixing, punching, implanting, burring, etc...)
  • General plastic (excluding cotton) materials can be used for the above purposes.
  • Ultrasonic welding can eliminate the need for glue (strong adhesive) to stick in the past, so that the efficiency is more stable and fast..
ANS
  • Ultrasonic, audio frequency f=1/T sound wave or vibration (Vibration), its frequency exceeds the range that the human ear can hear (20Hz~20KHz).
  • Ultrasound is widely used in medicine (detection, treatment), industry (cleaning, welding, implantation), military (ranging) and many other fields due to its high frequency characteristics.
    So ultrasound is defined by audio frequencies so high that the average human ear can't hear them.
  • Ultrasound can be transmitted by vibration in air, liquid or solid.
ANS
  1. ABS and acrylic are best fused
  2. PC, POM (plastic steel) are second
  3. PP, PE again third
  4. PET, PBT (meltable, but not easy to melt), note: if the fiber content of PBT is higher than 13%, the fusion will be powdery

Of course, we must understand that the strength of ultrasonic welding can never reach the strength of one-piece molding :

The result of welding ABS and ABS to each other is definitely stronger than the strength of welding ABS and PC to each other, because the melting points of two different materials will not be the same. Of course, the strength of welding cannot be the same, although we discuss ABS. Can these two materials be welded with PC? Our answer is that we can definitely weld, but is the strength after welding what we want? Not necessarily!

 

On the other hand, what if ABS melts with Nylon, PP and PE? If the ultrasonic HORN (upper mold) emits heat energy of 150 degrees in an instant, although the ABS material has been melted, the nylon, PVC, PP, and PE may only be softened. We continue to heat it to above 270 degrees. At this time, Nylon, PVC, PP and PE have reached the ultrasonic welding temperature, but the ABS material has been resolved into another molecular structure! Three conclusions can be drawn from the above discussion :

  1. Plastic materials with the same melting point have the strongest welding strength.
  2. The material melting point difference is too large, the welding strength is worse.
  3. The higher the density of the plastic material (hardness), the higher the welding strength than the lower density (higher toughness).

 

ANS
  • Actuator: A single unit that houses the converter, booster, and microphone, and can be moved up and down to apply pressure to the job.
  • Intensifier: A half-wavelength resonant metal fixed between the transducer and the microphone, with a cross section between the input and output to vary its amplitude.
  • Clamping force: The pressure exerted by the microphone on the workpiece.
  • Converter: electrical signal transmitter that converts electrical energy into mechanical energy.
  • Energy Indicator: A triangular plastic substance located on the junction of the plastic that concentrates the ultrasonic energy.
  • Long-distance welding: welding at a distance of more than 6mm from the contact point between the microphone and the workpiece.
  • Holder:A device for placing and supporting a workpiece.
  • Flash: The value replaced at the joint.
  • Shaping: Reshaping a thermoplastic part.
  • Frequency: by the converter. The number of oscillations per second or cycle generated by the strong wave device and the microphone, usually 20000 Hz for plastic welding.
  • Gain: The output amplitude/input amplitude of the microphone or booster.
  • Duration: After the ultrasonic energy stops, the clamping force continues to be applied to the workpiece to allow the plastic to solidify.
  • Microphone: A half-wavelength resonant metal rod that transmits vibrational energy to the workpiece.
  • Microphone Amplitude: The peak-to-peak displacement of the microphone working surface.
  • Microphone lower key: The key to lower the microphone to the workpiece when the microphone is not ultrasonic.
  • Insertion: The process of inserting a metal element into plastic.
  • Interface: The joint surface of two parts.
  • Contact: Welding point.
  • Load Meter: An instrument that indicates the power supplied by a power source.
  • Proximity welding: welding within 6mm from the contact point between the microphone and the workpiece.
  • Nest: Similar to a retainer.
  • Power Control: Control the amplitude of the microphone surface with a power source or fusion splicer.
  • Power source: The power equipment of the ultrasonic combination system can convert 50/60 Hz power into 20,000 Hz high-frequency power.
  • Preload: The load before triggering the ultrasound.
  • Pre-trigger: The trigger of the ultrasonic wave before the microphone touches the workpiece.
  • Program: Electronic mode that controls air pressure and electronic functions.
  • Burning: The process of melting and reshaping.
  • Molding Iron: Grab another component and re-melt and mold it with plastic.
  • Thermoplastic: A polymer that recovers when heated. (softens when heated)
  • Hot Hard: A polymer that hardens irreversibly when heated.
  • Adjust the system: Adjust the system to the best power.
  • Ultrasonic welding: The heat generated by ultrasonic vibration is used to melt and join two thermoplastic materials. When the ultrasonic wave stops, the molten material solidifies and the welding is completed.
  • Ultrasound: Vibration frequency exceeds human hearing (12 KHz).
  • Speed ​​(Microphone): The rate at which the sound-transmitting surface moves.
  • Welding time: the time that the ultrasonic energy is applied to the workpiece.
ANS

A Foreword:

  • Ultrasonic welding is to apply high-frequency vibration to the object. This vibration will cause the heat generated by the friction between the molecules to increase the temperature of the thermoplastic material. 
  • The material on the joint surface of the workpiece will flow when the vibration stops. The solidification and welding are completed under pressure, and the frequency of welding is higher than the frequency range that the human ear can hear (about 12 KHZ), so it is called "Ultrasonic".

B Ultrasonic Components:

  • Converter (this machine adopts #402 number)
  • The 20KHZ electrical energy from the power source is applied to the converter to convert it into high-frequency mechanical kinetic energy.
  • Amplifier (BOOSTER)
  • The welding of objects can change the magnification according to the material. (This machine adopts 1:1.5)
  • Welding head
  • HORN can be said to be a transmission tool for speed or amplitude. Its function is to apply the vibration and pressure transmitted by the transducer to the workpiece (this machine adopts the aluminum welding head with a width of 23mm)

C Parts of each part are assembled:

  • CONVVERTER + BOOSTER + HORN
  • The parts where the parts are connected are locked by special screws. Therefore, it cannot be disassembled at will.
  • CONVERTER+BOOSTER----UNF 1/2"*20
  • BOOSTER+HORN------UNF 3/8"*24
  • Before assembling each part, apply a thin oil film on the contact surface, and then lock it.

D welding head repair frequency:

  • The degree of wear of HORN on the workpiece is proportional to the material to be processed and the applied pressure.
  • Therefore, proper adjustment of the pressure can improve the wear of the HORN. If the wear is serious, the HORN must be scrapped.

E Grinding of the bottom mold:

  • Because the bottom grinding is all heat treated, its hardness is above HRC45, so AL HORN should be careful not to directly contact the mold when welding, otherwise the HORN will scream and be easily damaged.
ANS
  • The oil-water separator, as the name suggests, is a machine that separates oil from water. 
  • The oil-water separator is used to filter out the residual oil in the water. 
  • In the process of machining parts, heat is generated and oil fumes are generated, which causes the processor to inhale the lungs and cause occupational injury, and can purify the water in the water tank with high quality and enhance the cutting efficiency of the tool.
  • In more life applications, such as restaurants and apartments, the centralized sewage treatment equipment is widely used. 
  • Through this equipment, oil and water are separated and discharged to reduce the blockage of water pipes caused by oil sticking in winter.
ANS

The specific gravity of oil and water is different. Oil is insoluble in water. Most of the oil exists in the form of a mayfly layer in water.

But part of the oil exists in the form of dispersed oil and emulsified oil.

If the oil/water is directly discharged, it will cause serious environmental pollution. Therefore, it is necessary to separate and recycle the oil/water, which is the concrete manifestation of people's love for the earth today.

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