Pipe extrusion process and equipment


Ningbo Fangli Technology Co., Ltd. is a mechanical equipment manufacturer with nearly 30 years’ experiences of plastic pipe extrusion equipment, new environmental protection and new materials equipment. Since its establishment Fangli has been developed based on user’s demands. Through continuous improvement, independent R&D on the core technology and digestion & absorption of advanced technology and other means, we have developed PVC pipe extrusion line, PP-R pipe extrusion line, PE water supply / gas pipe extrusion line, which was recommended by the Chinese Ministry of Construction to replace imported products. We have gained the title of “First-class Brand in Zhejiang Province”.


Do you know what the pipe extrusion process and equipment are?

The process flow of the pipe extrusion production line is generally as follows:

First, after drying the raw materials, according to the formula requirements of the pipe forming materials, the raw materials are metered and loaded into the mixer, and the materials are mixed evenly at high speed. Then, the evenly mixed materials are stirred at low speed and cooled to below 40 before being put into the hopper of the extruder.

The materials in the hopper enter the extruder through the feed port of the barrel. The materials in the barrel are squeezed, sheared, and stirred. In addition, the influence of heating outside the barrel makes the temperature of the materials in the barrel gradually rise, and their physical state gradually changes from glass state to molten high elastic state, and finally becomes viscous fluid state to achieve complete plasticization.

As the screw continuously rotates at a constant speed, the uniformly plasticized molten material is extruded from the forming die at equal pressure and in equal amount to form the plastic pipe blank. After cooling and shaping, the pipe is cut according to a certain length to complete the extrusion.


Pipe extrusion equipment:

The pipe extrusion equipment consists of an extruder, a die, a sizing device, a cooling water tank, a hall off device and a cutting device. Among them, the commonly used die heads are straight through die heads, right angle die heads and side die heads. The sizing device generally includes internal pressure sizing and vacuum sizing.


If you need more information, Ningbo Fangli Technology Co., Ltd. welcomes you to contact for a detailed inquiry, we will provide you with professional technical guidance or equipment procurement suggestions.

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