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Welding machines are most often used to join plastic parts. You can buy the best models of these devices on the gk-sk website link, which enjoys constant respect among clients. This method is more economical, technological, and has no alternative in most cases. When welding plastic parts, a high-quality connection is obtained. Welding work of such elements is carried out both in industry and at home.
Welding of plastic elements is carried out by various methods, combined into two groups. The first group combines welding methods in which plastic parts are heated to a viscous state. If welding takes place without heating the parts or with heating to a temperature below the viscous state, then such methods belong to the second group.
Most often, welding is used, during which the elements are heated to a viscous state. The following types of quarrels are distinguished:
– gas;
- with molten additive;
– with the help of laser, infrared radiation;
– using ultrasound;
– by friction;
– with the help of a high-frequency current.
All these types of welding differ in the type of energy consumed, the method of its transformation and introduction into the contact zone.
Plastics are classified into those that differ in their behavior during heating and the ability to weld under the influence of heat. The first group is thermoplastics. Such plastics are heated to a state of viscous flow and their structure and properties are not disturbed. They can be heated to soften, and then returned to their original state. The first group includes almost all polymers. The second group includes polymers in which the ability to transition to a viscous flow state is lost. Such plastics are called reactive plastics. Such polymers cannot be welded by heating.
When welding polymers, the welder performs the following actions:
1. Energy is supplied and converted to activate the surface for welding;
2. Welded surfaces must interact in the contact zone;
3. Formation of the structure of elements.
The most important action when welding plastic parts is the interaction of welded elements. When aluminum goes into a state of viscous flow, the layers of the melt mix, which leads to the disappearance of interfaces. This condition promotes the formation of a connection with high strength. With ultrasonic and high-frequency welding, the connection of elements is formed instantly.
Heated tool for brawling
Welding of plastic elements with the help of a tool after heating is the simplest method. Due to certain advantages, such a quarrel is popular among quarrelers. This method of welding is characterized by such advantages as ease of welding, low cost of devices and protective elements. This type of welding is used to perform work on connecting pipes, manufacturing containers of various sizes and shapes, manufacturing automobile parts, etc.
Welding using direct heating is most often used. With this method of welding, the parts are joined by two actions:
• the heated device for welding elements is pressed against the surface of the element to be connected to warm it up;
• after heating the surface, it is necessary to apply effort to weld parts. Then the elements are cooled.
Hot gas welding
To heat the elements, gas is used, which comes from the nozzle of a burner or a thermal dryer.
When choosing gas, it is necessary to take into account the properties of plastic. Air is the most economical gas. Nitrogen and argon are used for welding plastics with a large amount of oxygen in their composition.
Welding of elements with heated gas is used very often. The cost of the necessary equipment is low. Using this method of welding, it is possible to connect elements of different sizes and configurations. Most often, by this method of welding, structures made of material whose thickness is at least 1,5 mm are joined. For example, chemical apparatus, containers of different sizes and shapes, pipes.
