August, 2009
In order to protect the wheel box of the twin screw extruder, you must obey the followings:
1. The lubrication used in the twin screw extruder must be original No.150 Medium Pressure gear oil;
2. The normal operation oil leveler may not under the center oil leveler. Please supplement when it’s under the center oil leveler;
3. After [...]
Unstable current of the mainframe
Reasons:
(1)Uneven feed.
(2)There is a damage or bad lubricant effect in the axletree of the twin extruder’s main motor.
(3)Failure in some parts of the heater and it does not work.
(4)The trim plate of the screws is placed in a wrong place. Or interference from components because of the wrong phases.
Solutions:
(1)Check the [...]
Attention as follows
1. If the extruder makes an abnormal sound, please stop the extruder immediately and check it;
2. Empty is not allowed when operating the extruder;
3. In order to avoid the damage of the screws and barrel, please prevent the metal or other sundries falling into the hopper. You can take magnetic components or magnetic [...]
Similarities:
Both of parallel twin screw extruder and conical twin screw extruder have the transmission mechanism to push forward the plastic compulsorily. The two kinds of extruders also have the nicer ability of mixed plasticization and dehydration. In addition, they have the similar adaptability of molding process for the material and plastic.
Differences:
1. Diameter
Parallel twin screw extruder [...]
According to the direction of the rotation of the twin screws, extruders can be divided into two types: parallel co-rotating twin screw extruder and parallel counter-rotating twin screw extruder. The parallel co-rotating twin screw extruder means that the two screws of the extruder rotate to the same direction but the screws of the parallel counter-rotating [...]
Compared with the parallel co-rotating twin screw extruder, conical counter-rotating twin screw extruder can be described “section-material-type”equipment with low speed and low power consumption. It normally uses the non-combination screw.
Compared with general conical twin screw extruder, the screw of conical counter-rotating twin screw extruder used of WPC production should have larger and longer material feeding [...]
Parallel co-rotating twin screw extruder is normally made up of two-stage extruder. It can make wood flour dry and resin melting procession separate. Besides, it also can operate wood flour and plant fibers directly and then continually mix and extrude wood flour with the melting resin after wood flour is dried.
This kind of two-stage extruder [...]
Nowadays the main operation of WPC is twin screw extruder, because it delivers materials relying on the principle of positive displacement and having no pressure returning ,easy feeding ,good exhausting affection. Thus the volatile components in wood flour can be fully ruled out. The meshing of screws with each other and the strong shearing can [...]
The extruding formation can also be called as extrusion molding. It is a forming method that with the help of the extrusion affection of screw or plug screw, and the uniform plasticization melting plastic can pass the mouth model forcibly so that it can form series of products with constant cross-section.
Extrusion forming is mainly used [...]
The main trend of plastic machinery such as twin screw extruder is with portfolio structure, specialization, serialization, standardization, micro-and large-scale, personalization, and intelligence. Users can do the “mix and match” based on their actual requirements. Besides, a lot of new type equipment and special purpose equipment have been developed, due to the requirement of technological [...]
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