ewly designed universal Hot Plate welder with 3 individually controlled heat zones and large size heat plate (mirror) 850 x 470mm for flexible tooling application. Perfect machine for joining of thermoplastics using heat and pressure. In the automotive industry, the technology is used to assemble headlights, taillights, ductwork, manifolds, batteries, fuel tanks, filter housings, and coolant and fluid reservoirs. Appliance manufacturers use hot-plate welding to assemble spray arms for dishwashers; agitators and balance rings for washing machines; brushes for vacuum cleaners; and reservoirs for steam irons. In the hardware industry, the technology is employed to weld window and door frames.
ot Plate Welding is a thermal welding technique capable of producing strong, air-tight welds in thermoplastic parts. When using thermal energy in a tightly controlled manner, thermoplastic parts can be heated to molten temperatures very quickly and then joined together. The process uses a heated, metal plate to heat and melt the interface surfaces of the thermoplastic components. Once the component interfaces are sufficiently heated, the hot plate is removed and the components are brought into contact to form the weld. An axial load is applied to the components during both the heating and joining phases of the welding process.
he hot plate is typically flat, but can be shaped to match the profile of the components being welded. If necessary this could be three-dimensional. Hot plates are usually manufactured in aluminium or aluminium bronze. The latter has greater dimensional stability at the high temperatures required for the hot plate welding process.
To prevent the molten thermoplastic materials sticking to the hot plate during the heating phase of the process, the plates are often coated with a non-stick surface. Typically, a PTFE (polytetrafluoroethylene) based material is used for the coating. This could be a permanent coating or a semi-permanent, adhesive backed PTFE fabric.