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Modern use of plastic extruders Jul 19,2019
Plastic extruder is a technology that dates back to the late 18th century. It is responsible for plastic parts such as pipe and wire insulation. This technology dates back to the end of the 18th century, but it still affects us every day. In 1797, Joseph Branmah first patented the process for the first time because it was originally used to actually manufacture lead pipes. Similar to the plastic process, this process involves heating the metal, pressing it into a mold to form a shape, and then hardening it.

Soon, plastic entered the equation, which gave rise to the plastic extruder process we rely on today. Plastic extruders typically utilize tiny plastic particles or chips that melt at high temperatures and slowly pour into a mold. Early extrusion techniques developed by Branmah involved using a plunger to press the material into a die, while modern plastic extrusion techniques are slightly different. Today, modern plastic extruders utilize heated screw feeders that quickly and efficiently push plastic pellets from the hopper through the barrel and into the mold.

There are various forms of plastic extruders to achieve different goals. Although there are many different types of extrusion, the main methods include sheet extrusion and tube extrusion. Sheet extruder is used for products of plastic sheet or film. After extrusion molding, it is drawn through a cooled calender roll set and cooled. Many times, a technique called coextrusion is used to add more than one layer on top of the base extrusion layer. Coextrusion is a simple process where multiple extruders are used to melt and stably add different plastics to a single extrusion die. This gives the extrudate many specific characteristics including, for example, a softer feel, a gripped surface, a matte finish, and the like.

The extruded sheet also undergoes thermoforming multiple times, which involves heating the sheet until it becomes soft again and then shaping it into another shape by using a mold. Many times, a sheet is pressed into a mold using a vacuum (this is called vacuum forming). This process places the extruder sheet in its more basic orientation and bends it to create complex shapes, such as computer cases, displays, general plastic products, and more. Although plastic extrusion is used to produce an extremely wide range of products from pipes, pipes and seals to plates, rails, rods and profiles, a large amount of plastic is used to make extrusions with the proper properties. For example, extruder pipes to be used in high-temperature or potentially corrosive applications may require completely different plastics than general-purpose pipes.

Given the large number of plastics on the market today, this provides a wide range of solutions for plastic parts, parts and products almost everywhere.

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