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High thickness and large-diameter pipes: how to avoid sag in pipe extrusion

The increased usage of large-diameter pipes, from 630mm to 1,200mm, across various applications has encouraged the development of PE100 materials suitable for large-diameter pipes to prevent problems during extrusion, like sagging. Maintaining dimensions within specifications is problematic for the......

Higher Diameter HDPE Pipes and Cooling Problems

Maintaining dimensions within specifications is problematic for the extrusion of large diameter thick-wall HDPE pipes (> 75mm wall) due to sag caused by insufficient resin melt strength.

Functions of three functional areas of extruder

Today, I would like to share the functions of the three functional areas of the extruder.

Pipes Extrusion: Basic Principles

A pipe extrusion line consists of different parts. An extruder converts raw plastic material into a continuous tubular melt by extrusion through an annular die. The molten pipe then proceeds through a sizing or calibration bench (which adjust its dimensions) to a cooling tank. After being cooled, th......

PVC raw material selection and formula

PVC plastic is a multi-component plastic. Different additives can be added according to different uses. Due to different components, PVC products show different physical and mechanical properties, which can be applied in different occasions. PVC plastic pipe accounts for a large proportion in plasti......

Principle and application scope of single screw extruder

In most extruders, the screw speed is changed by adjusting the motor speed. The drive motor usually rotates at a full speed of about 1750rpm, which is too fast for an extrusion screw. If it rotates at such a fast speed, too much friction heat will be generated, and the uniform and well stirred melt ......

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