Knowledge

20Nov, 2024

Why is material mixing necessary?
Material mixing is necessary to ensure uniform blending of the color masterbatch with the plastic particles. If the plastic particles and color masterbatch are fed separately and t
20Nov, 2024

Is there a relationship between flow rate and screw speed?
The higher the screw speed, the higher the flow rate. Therefore, to accelerate the production of plastic pipes, it is necessary to increase the screw speed. However, the heating te
20Nov, 2024

Which part experiences the highest pressure during the extrusion process?
The section where the molten material transitions into the finished product, near the die head, experiences the highest pressure.
20Nov, 2024

What changes occur to plastic particles during the extrusion process?
The extrusion machine heats the plastic particles to a viscous flow state. Under pressure, the plastic is forced through a die of a specific shape, resulting in a continuous body w
20Nov, 2024

Why is an extruder needed?
Currently, due to different manufacturing processes and proportions, the plastic pipes available on the market cannot effectively control the hygienic properties, dimensions, tensi
19Nov, 2024

What are the production equipment for lined composite pipes?
The production equipment includes extruders (specifically, hot extruders), crawler tractors, vacuum cooling and shaping machines, and fixed-length cutting machines. Additionally, t
19Nov, 2024

What are the forms of pre-treatment?
Generally, there are two commonly used forms of pre-treatment for lined composite pipes: pipe brushing and sandblasting. Chemical rust removal is also a possible method, but due to
19Nov, 2024

Why is pre-treatment necessary for lined composite steel pipes?
(1) Pre-treatment removes contaminants, oxide scales, welding slag, and other impurities from the inner wall of the steel pipe. It also smooths the inner surface of the steel pipe
19Nov, 2024

What are the production materials for lined composite pipes?
(1) Materials for Metal Pipes: Common materials for metal pipes include seamless steel pipes, hot-dip galvanized steel pipes, copper pipes, cast iron pipes, or fiberglass-reinforce
19Nov, 2024

What are the characteristics of lined composite pipes?
They possess both the high mechanical strength of metal pipes and the corrosion resistance, oxidation resistance, thermal insulation, and other characteristics of plastic pipes.
17Nov, 2024

How are lined with plastic composite pipes produced?
The production method of lined with plastic composite pipes mainly involves combining plastic pipes with metal pipes (such as steel pipes or aluminum alloy pipes) through physical
17Nov, 2024

Why is it called lined with plastic composite pipe?
The process of manufacturing lined with plastic composite pipe involves inserting a plastic pipe into a steel or aluminum alloy pipe and then heating it to adhere the plastic pipe

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