Ever wonder where the dependable and long lasting plastic products come from? Or more specifically where they are manufactured? Most every plastic used in our daily lives is a product of Plastic Profile Extrusion. It’s an interesting process that simply starts with the melting of small raw plastic beads. The plastic needs to be in bead form for easier melting and profile forming. Plastic Extrusion companies manufacturer recognizable products such as piping, window frames, and even adhesive tape! Wire insulation and Plastic sheeting are also big examples of manufactured products. Well for all the knowledge craving minds let’s begin with the first step in Plastic extrusion!
As we begin the plastic beads are fed into a heated cavity or cylinder. In most cases the plastic is mixed with colorants or UV inhibitors. As all the plastic and anything mixed in is inside the cavity it’s forced through a screw mechanism.
The screw mechanism forces the plastic and any remaining material out the extruder cavity. While the plastic is inside the heater it is a toasty 400 degrees. This is a cool fact! Most extrusion companies have three different heaters inside the cavity.
This is due to overheating being a quite troubling problem for plastic extrusion experts. SO if the plastic is gradually brought to its melting point by three heaters it’s not one source of heat at one time. This allows for no overheating. Burnt plastic isn’t necessary and does not smell good!
Through the cavity the friction and pressure can sometimes be so great there is no need for the heaters. Plastic Manufacturing Companies shut off the heaters and allow the friction and pressure to keep the plastic at the desired temperature. That’s pretty interesting friction and pressure can keep plastic at that high of a temperature.
After the heating is complete cooling fans are then used to keep the cavity at the correct temperature. As the molten plastic reaches the front of the barrel and is complete in the cavity, it’s time for the plastic to go through a specially designed screen.
This screen allows for the plastic to become separated from any remaining contaminants whether it is types of food or clay. Following the screen it’s time for the die, which gives the plastic its specific profile. After the die is added it must be cooled most cases in a sealed water bath.
If the plastic product is too gentle cooling rolls are employed rather than the water sealed bath. I’d like to see one of those huge cooling rollers in action! Plastic sheeting is an example of a cooling roller required plastic product. It’d be a lot of work then to have it collapse at the end stage!
Learning About Plastic Profile Extrusion Is Great! Related Video:
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