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Extrusion Planetary Screw and Barrel
I. Technical Specification of planet screw and barrel:
Base Material | 1. 38CrMoAlA(JIS SACM645) 2. Cr12MOV(JIS SKD-11) 3. 4Cr5MoSiV1(JIS SKD-61) 4. 42CrMo(AISI 4140) 5. 9Cr18MoV |
Bimetallic Alloy Material | 1. Fe-based alloy 2. Ni-based alloy 3. Co-based alloy 4. Tungsten carbide |
Processing Technology | 1. Heat treatment 2. Nitriding treatment |
Technical Parameter | 1. Nitrided layer depth: 0.50-0.80mm 2. Nitrided hardness: 900-1100HV 3. Nitrided brittleness: Less than 2 level 4. Surface roughness: Ra 0.4 5. Linearity of screw: 0.015mm |
II. Structure of planet screw and barrel:
The extrusion system can be separate for two sections. First section is normal screw (screw diameter equal to barrel inter diameter), and second section is planetary screw which general contains 7~18 pcs small screws and a main screw in the centre, the number of small screws depend on the screw diameter and application. These small screws is intermeshing with main screw and interior screw in the barrel inner wall.
III. The characteristics of planet screw and barrel:
1. No deadangle in the flow channel, have good self-cleaning performance. It’s better for processing Rigid PVC.
2. As there are many small screws, the screw intermeshing frequency is higher, this function is proportional to the screw rotate speed, so it can largely increase the times of kneading, extrusion, cutting and mixing.
3. Basis on the same extrusion output, the materials is shorter stay in the planetary screw extruder.
4. Energy saving.
IV. Application of planet screw and barrel:
The planetary screw barrel is mainly used for heat sensitive materials, such as processing rigid calendered PVC film. In the calender film production line of PVC transparent chip, adopt planetary screw barrel to plastify and mixing raw materials for calender. It can make all melting materials, accessory ingredient and modifier uniformly mixing and dispersing.
V. Pictures of planet screw and barrel:
CissCo Machinery is a fast forward professional supplier of complete plastic extrusion equipments and systems.
At CissCo, we design, engineer and manufacture customized PLASTIC EXTRUSION LINES. There is a proven CissCo technology for virtually every extrusion line application. Our extensive knowledge of the industry - its raw materials, processes and finished products - provides reliability, cost optimization and on-time delivery, the same benefits that you would expect from proven pre-engineered components, all in a system designed and tailored to your unique requirements.
To ensure the efficiency, productivity and safety of our systems, we offer extensive start-up assistance, comprehensive training and operator manuals. When you have service needs, you can count on an immediate response from your nearest CissCo facility, one of many we have located strategically throughout the world.
we are using the high technology from European. From the pictures, you can find the similarity between our machine and theirs. Our technical advantages are as follows,
1. European pipe extrusion technology;
2. 20 years plastic extrusion experiences;
3. Easy to operate, Stable production performance, Low production cost, Good quality pipes;
4. Quicker production speed, bigger output;
5. Good steel material and well-known brand electrical parts;
6. Good appearance of machine, beautiful;
7. Free training for technical process, formula and know-how;
8. Full time and high level after-sale services.
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