Extruder
PET is strong, lightweight and is still improving its recycling track record. Last month Petcore announced that European post-sorting PET collection reached 1.26m tonnes in 2008 (an increase of more than 11% on 2007) and that the overall collection rate rose by nearly 5%, from over 41% to 46% of all PET bottles on the [...]
In 1863 President Abraham Lincoln issued the Emancipation Proclamation freeing all slaves in the United States. One hundred years after this decree was signed, however, the life of blacks was still “sadly crippled by the manacles of segregation and the chains of discrimination.” On August 28, 1963, a quarter of a million people of all [...]
3LPE/PP anti-corrosion coating is a multi-layer steel pipe coating system that integrates FBE in North America and protective PE layer in Europe. Nowadays, it has been extensively used in transportation projects of oil, gas and water around the world. It is honorably title as “everlasting anti-corrosion system” with its excellent performance.
The production line consists of [...]
Reasons for Machine Start-up Failure
Reasons:
(1) There is a problem in the driving process.
(2) There are problems in the thread, maybe the fuse is burnt out.
(3) The interlocking devices related to the main motor have stopped working.
Solutions:
(1) Inspect the working/driving process of the extruder which must be in compliance with the normal principle.
(2) Examine the electro [...]
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 [...]
Nanjing Rubber & Plastics Machinery Plant
Nanjing Rubber & Plastics Machinery Plant © 2010
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