PP-R
pipe is extruded by extruder, which is widely used now. Field operators and
technicians need to know certain molding equipment conditions. Ningbo Fangli Technology
Co., Ltd. is a machinery and equipment manufacturer of complete sets of plastic
extrusion equipment and new environmental protection and new material equipment
for nearly 30 years. Here we have prepared some molding equipment conditions
for your extruder equipment, as follows:
The
extrusion process route of this kind of pipe is the same as that of ordinary
polypropylene pipe, which adopts single screw universal extruder. However, due
to the low thermal conductivity, high molecular weight and low melt flow rate
of random copolymer polypropylene resin, that is, its melt viscosity is high,
it needs more heat from crystal to high elastic state and then to melt viscous
flow state in the extrusion process, which means it consumes more power; The
transformation process of raw material form has some special requirements for
the structure of the equipment.
In
the screw structure of plastic extruder, the screw structure is of equal pitch
and varying depth, with a ratio of length to diameter greater than 30:1. We
generally use 36:1. The homogenization section of extruder screw is provided
with barrier mixing section; the screw body has a central hole, which can be
used with cooling water to control the working temperature of the screw easily.
It is necessary to ensure that the raw materials in the feed section can be
smoothly pushed forward by the screw.
The
barrel structure of the extruder equipment for producing this kind of pipe
needs some certain special requirements. The difference between the barrel
inner hole working face and the ordinary barrel inner hole working face is that
there are longitudinal grooves evenly distributed on the circumference at the
feeding section, which are used to increase the friction between the thick
material and the barrel inner surface, and improve the forward conveying
capacity of the raw material after entering the barrel. Generally, the depth of
the longitudinal groove is 1 ~ 3mm, and the length is about 3 ~ 4 times of the
inner diameter of the barrel.
The
above is about the equipment conditions of the production of PP-R pipe, hoping
to provide you with some help. If necessary, welcome to contact us.
https://www.fangliextru.com/pp-r-pipe-extrusion-equipment.html