The process flow of release paper lamination is as follows:
1.Raw materials
The raw material used for this equipment is polypropylene. When selecting materials, you should choose polypropylene based on the extrusion performance based on the resin grade. Read the resin grade description in detail before heating.
2.Plastification
This process is carried out in the extruder. The raw materials are fed into the hopper through the automatic feeding machine. After the raw materials enter the extruder barrel, they are heated through the feed preheating section, plasticizing section, extruder and metering section. Screw mixing plasticizes the pellets into a melt. The key point of the plasticizing process is temperature control. The method we generally use now is: One part is the barrel section and the barrel section. There are seven groups of heating, and the heating is carried out gradually from the first group to the seventh group. The second part is the "T" type mold, which is divided into thirteen groups. The general heating method is to heat the thirteen groups at the same temperature, and the pipe temperature is one group, and a fixed temperature can be set. The temperature is adjusted according to the thickness of the film cast by the "T" type die. Different raw materials have different melting points (the temperature is adjusted according to the actual temperature control zone).
3. Extrusion casting
The dissolved material from the screw extrusion section passes through the filter plate of the machine head to turn the original vortex-like material into a flat flow, and then enters the "T"-shaped die to split the flow at both ends and become flakes. At the same time, observe whether the outflowing flakes are uniform. The material surface should be consistent and clear, and compounding can be started only after it is clear.
4. Composite embossing cooling, traction and winding
The main components of this process are a pattern roller, a polyurethane roller, and a "T"-shaped die. The high-temperature molten film cast from the "T"-shaped die is pressed by the cooling pattern roller and the polyurethane roller cylinder, so that it adheres to the base material and is rapidly cooled to form a pattern. The material is pulled into the finished product and rolled up.
