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”.
After the plastic products manufacturers
purchase the plastic extruder, in order to maximize the use efficiency of the
extruder equipment, we hope to maximize the production capacity of the plastic
extruder. In the case that the equipment can not be upgraded or transformed, we
will improve the production capacity of the equipment by increasing the
rotation speed of the main machine of the plastic extruder. Is this really
feasible? The followings are some explanations.
First of all, we know the theoretical
calculation formula of the output of plastic extruder. For example, the
theoretical output of single screw extruder can be obtained by formula
calculation:
Plastic extruder output = material density
* sectional area of screw extrusion section when material is full * lead
*rotation speed * conveying efficiency
From the formula, we can know that if we
increase the rotation speed of the main machine of the plastic extruder, we can
increase the production capacity of the equipment in a direct proportion, but
in fact, the production capacity of the extruder is not so simple.
In order to improve the production capacity
of plastic extruder, we also need to ensure the quality of the finished plastic
products. Generally, when the extruder produced by our equipment manufacturer
produces plastic products, it is most appropriate to control the main engine
speed between 80-90% of the maximum speed.
Secondly, in the process of extruder
production, the speed of the main machine will be improved, which will
certainly improve the extruder capacity. But with the improvement of screw
speed of plastic extruder, the stronger the shear capacity of screw to materials,
for the shear heat sensitive type (such as PVC), the material will degrade in
the production process, which will eventually lead to unqualified or even
scrapped plastic products. At the same time, the speed increase will increase
the pressure of the material in the barrel, and the failure of material return
and material spilling from the exhaust port may occur, which is not conducive
to stable production. The phenomenon of returning material will cause the
reduction of the conveying efficiency of extruder, and the final production
capacity can not be improved. Finally, the increase of screw speed, the
retention time of materials in the barrel is reduced, and the corresponding
plasticizing and mixing capacity of the screw will increase accordingly. If the
speed increase exceeds the actual capacity of the screw, the final product will
not be qualified.
Thirdly, the speed of the extruder is lower
than the design requirements, and the result is opposite to the above, which
will also cause some trouble to the production. Therefore, the central meaning
of this paper is deviated, and I will not explain it here.
In conclusion, the improvement of the main
machine speed of plastic extruder can not really improve the equipment
capacity. Only in the premise of meeting the requirements of extruder screw
equipment and ensuring the quality of plastic products, the correct screw speed
can be increased or set to control the stable extruder capacity. For our
qualified plastic extruder, we will design the materials reasonably. We suggest
that the speed of extruder should be controlled at 80-90% of the maximum speed
of the equipment.
It is believed that with the continuous
development of extruders, we will obtain new extruders with higher speed and
higher production capacity to provide you with better production guarantee and
improve economic benefits. If you need more information, Ningbo Fangli
Technology Co., Ltd. welcomes you to call for a detailed inquiry, we will
provide you with professional technical guidance or equipment procurement
suggestions.
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