Twin screw single screw PVC pelletizing machine extruder air cooling system
----Working principle of single screw extruder
As a common extruder, single screw extruder is used in the plastics processing industry. What is the principle and structure? Next, the principle of the single screw extruder is analyzed from the conveying section, the compression section and the metering section of the extruder. The single screw extruder is generally divided into three segments in the effective length, and the three segments are determined according to the diameter of the screw, the pitch and the depth of the screw. In general, the length of the three segments is divided by 1/3.
The principle of single screw extruder: the last thread of the mouth of the mouth begins to call the conveying section material not to be plasticized here, but it should be preheated and squeezed. The old extrusion theory thinks that the material is loose, and later it is proved that the material is actually solid plug, that is to say, the material is squeezed after the material is a solid plug. Therefore, as long as the transportation task is completed, its function is fulfilled.
the second section is called the compression section when the volume of the slot is gradually smaller, and the temperature should reach the plasticizing degree of the material. Here, the compression is made by the transmission section three, which is compressed to one. This is called the compression ratio of the screw 3:1, some machines are also changed, and the plasticized material enters the third section.
The third section is the measurement section of the material here to maintain the plasticizing temperature, just like the metering pump as accurate and quantitative delivery of the melt material to supply the head, at this time the temperature can not be lower than the plasticizing temperature, generally slightly higher.
----Working principle of twin screw extruder
First of all, the twin screw extruder has the extruder principle of a single screw extruder: solid conveying and melting pressurization and pumping mixed stripping and devolatilization, but not simply. The research on the theory of twin screw extruder begins late, and it has many types, the geometry of the screw is complex and the extrusion process is complicated, which brings many difficulties to the research.
As a whole, the theory of twin-screw extrusion is still in its initial stage, which is called "more skills than science". From its extrusion process, it can be divided into three parts.
1. A mathematical model of physics is established to guide the design of the twin screw extruder and the optimization of the extrusion process.
2. It is necessary to find out the true state of the changes in the state of the material in the extrusion process of more than two kinds of polymers and materials, the form of mixing, the process of structural change, and the relationship between the final mixture and the properties.
3. As a twin screw extruder, the internal relationship between the reaction process, the speed, the performance and the configuration of the screw and the operating conditions during the extrusion of the extruder is established, which is used to guide the extrusion of the reaction.
Machine Composition
| Model |
Machine |
Quantity |
| 1 |
110L Kneader |
1 set |
| 2 |
Conveyor |
1 set |
| 3 |
Twin screw force feeder |
1 set |
| 4 |
GS-75 twin screw extruder |
1 set |
| 5 |
GSD=180 single screw extruder |
1 set |
| 6 |
Electrical control system |
1 set |
| 7 |
Air cooling hot cutting system |
1 set |
Main Technical Parameters:
| Kneader |
Capacity |
110L |
| Output |
100-140 kg/batch |
| Motor power |
180 kw |
| GS-75 twin screw extruder |
Main motor power |
132 kw |
| screw diameter |
71 mm |
| Screw L/D |
36:1 |
| GSD-180 single screw extruder |
Main motor power |
75kw |
| Screw diameter |
180 mm |
| screw L/D |
9:1 |
After-sale service & Technical support:
Pre-sales services
* Any concerns of our machine by email/phone will be replied ASAP within 24 hours
* Inquiry and consulting support
* Quick reply.
* View our factory
After-sales service
* Traning how to install the machine, training how to use the machine
* Engineers are available to service machinery overseas
* One year guarantee for the machine expect the spare part, we can supply lifelong technology service to solve any problem form you.
Contact
Nanjing GS-mach Extrusion Equipment Co., Ltd
No.12 Shanghu Industrial Park,Jiangning Street, Jiangning District, Nanjing China
Mobile Phone/ Whatsapp: +86 18851021602
Tel: 86-25-81030382-8:00~17:00
Fax: 86-25-52790852
Email: extruder5@njgsmach.com
Web: http://www.plasticpelletextruder.com
Product Picture:
