Extrusion Process Principles
Extrusion process is very common in the
plastic industry. It is used for high volume plastic production. In extrusion
process the color pigments along with other performance enhancing additives are
combined with resin which is then pushed through the rotating screws. The heat
and pressure generated within the barrels of screw is dispersed and melts the
plastic elements. Thus a homogeneous mixture is produced. A cool die is usually
placed at the end of the mixture. After passing through the die the mixture is
ready to experience the finishing operation which may include pelletizing,
calendaring or other processes.
The arrangements shows a motor which
runs the gear box. The speed is used by this gear reducer box. Which then moves
the screw. The metal ingredients is poured through the hopper. The feeding of
metal is done in the feeding zone. Then with the increased pressure and
temperature of the screw melts the elements in the melting zone. The next part
is the melt pumping zone which increases the pressure of the liquid. This
pressurized liquid is then pushed through the filter. Then the molten metal
flows through the die and cooled. The thermocouple is set at different points
to measure the temperature. The figure of the whole process is shown below. Click on it to have a better view .
Advantages of Plastic Extrusion Process
One of the main advantages of the
extrusion process is it can produce pipes of any length. It is continuous. High
production volumes with very low cost per pound. The melting is very efficient.
The mixing of the ingredients is very good. Different types of raw materials
can be used. It uses thermoplastics which can be reused.
Disadvantages of Plastic Extrusion Process
Highly complicated parts are very not
suitable for production in extrusion process. It can only produce the parts
which have uniform cross sections.
Please Read :
Please Read :
- Different Types of Plastics and Their Advantages and Disadvantages
- A complete Guide to Casting Process
nice information about Extrusion and its types Thanks
ReplyDelete