Ultrasonic welding technology and process

Ultrasonic welding technology, is a relatively new plastic welding assembly technology,
1. It for super sound design, and the cross-section wire welding parts, relative to the total volume of products.
2. Currently ultrasound welding machine for super sound of machine technology, and the degree of ultrasound operators are very carefully.
Ultrasonic welding process
Welding:
Refers to the generalized two thermoplastic product welding process. When the super sound ceased to vibrate,
Solid materials melting, welding. The intensity of a piece of juncture of even had to material,
As long as the product of the joints designed to match,
It is absolutely not completely sealed what problem,

Disc:
Melting mechanical lock to form a qualitative different plastic bolts.

Embedded:
A metal element embedded in pre-setting hole of plastics products.
High strength, molding cycle short installation the advantages of quick!!!!!!
Similar to the mold design of embedded thing!
Bending/generation
Ultrasound will melt part of the parts of a plastic again protuberant parts or plastic or other extrusion parts. This kind of advantage lies in the processing of fast, small internal pressure, good appearance and the nature of materials.
Some belief:
Welding is not reserved for energy control or two thermoplastic component of local welding. Welding can also produce a strong bonding structure, especially suitable for some large parts, plastic or casting of thermoplastic and those of complex structure, to enter the product engagement.
Cut cut:
And some of the orderly and disorder sealed plastic material thermal ultrasound technology. In this way the edge sealing, and no flash does not crack, edge.
Textile/film sealing textile flour and some film sealing can also be used to ultrasound. It can execute tight pressing on film, but also on the textile for neat local shear and seal. At the same time also played the suture adornment effect.
Polymer: thermoplastic and thermosetting
Monomer together in process known as "polymerization". Polymer can be divided into two categories: the basic thermoplastic and thermosetting. Thermoplastic materials after thermoforming can also soften and forming again, experience is the change of state properties make it - this determines the thermoplastic materials ultrasound pressure and adaptability. Thermosetting material is not the chemical reaction by rebellious generation, again can not make heating or compression molding thermosetting product has traditionally been softened, so that is not suitable for use of thermosetting ultrasound.
Influence factors of ultrasound welding
Speak of thermoplastic can not say to force, pressure on sonography of various resin. The main factors including polymer structure, melting temperature, flexibility (hardness), chemical structure.
Polymer structure
Non-crystalline polymer molecules disorder, and obvious that material gradually become soft, melt flow when the temperature (Tg glass transition temperature). These resins are generally effective transmission of supersonic vibration and extensive in the pressure/amplitude range of welding.
Half a crystalline polymer molecular orderly, significant melting (Tm) and melting temperature freezing again. Solid crystalline polymer is elastic and can absorb high-frequency mechanical vibration. So this is not easy to polymer ultrasonic vibration energy to pressure for higher request, the amplitude. Need high energy (high melting heat) can take half of the crystalline structure to make materials from crystallization interrupted glue flow state into state, this also determines the melting point of this kind of material, the materials melting obviously from heat, temperature once reduced may cause rapid solidification of materials. So must consider the particularity of this kind of material (for example: high amplitude, juncture of good design, and super sound fixture and effective contact, and excellent work equipment) can be achieved success of ultrasonic welding.
The melting temperature
The melting point of polymer, the higher the welding required ultrasound.
Hardness elasticity coefficient) (
Whether its hardness of effective transmission of supersonic vibration is very influential. Overall, the harder the stronger the force transmission.