From the early days of the rubber masticator which was primarily used to reclaim or re-process rubber scraps, modern day extrusion has come a very long way. Used generously and frequently to yield profiles for items like pipe and tubing for the architectural, construction, transportation, automotive, electrical, and general industrial markets, plastic extrusion is an art that few excel at! There has to be just the right amount of raw material in the extruder die, the ambient temperature and humidity must be carefully controlled to keep cracks and murkiness of the end deliverables at bay and most importantly there needs to be a delicate balance between the various materials being pushed together if co-extrusion is required.
THE PLASTIC EXTRUSION PROCESS AND PRODUCT ADVANTAGES:
Extruded plastic products not only have a uniform profile because of the characteristics of the manufacturing process, they can also be produced in bulk quantities without requiring much investment or physical labor. The tubes and pipes are durable and robust. Some are even flexible and can be shipped to clients in a reel.
The extrusion machine is carefully temperature controlled with PIDs (Proportional – Integral- Derivative controller) and fans. The speed of propulsion of the raw material with the friction of the movement may also produce sufficient heat to cause melting without the need of any external stimulation. It all depends upon the nature of the product.
The plastic is in the form of beads and mixed with colorants or UV inhibitors. These beads enter into the barrel like hopper under the action of gravity and pass through the hole of the feed throat and into the extrusion passage. The rotation of the screw gives momentum to these raw material pellets which travel the length of the pipe and gradually begin to melt.
The width of the cylindrical profile of the die fitted to the mouth of the extrusion passage determines the profile of the end deliverable.
This dimension can thus be varied to create tubes and pipes corresponding to client specifications!
UNIVERSAL POLYMER AND RUBBER’S OFFERINGS:
Universal Polymer and Rubber has conquered the pinnacle of expertise and finesse where plastic extrusions are concerned. Their products typically have high tolerance and a width of 4 inches. Up to 30 feet (or more) of continuous tubing length is shipped to buyers in prime condition.
Working with high-density polyethylene (HDPE), polypropylene (PP), and other plastics, UP&R is an ISO 9001 company that strives to be in compliance with ASTM standards.