Transparent Rigid PVC Granulator Pelletizing Machine Mixer Hot Cutting System
Transparent plastic must first have high transparency, and secondly it must have certain strength and abrasion resistance, impact resistance, heat resistance, chemical resistance and the bibulous rate is smaller, only in this way can in use, can satisfy the requirements of transparency and unchanged for a long time.
Due to the high light transmittance of transparent plastics, the surface quality of plastic products must be strict, and there must be not defects such as streaks, pores, whitening, halo, black spots, discoloration, poor gloss, etc. Equipment, molds, and even product design must pay great attention to and impose strict or even spacial requirement. Secondly, because transparent plastic have high melting point and poor fluidity, in order to ensure the surface quality of the products, the process parameters such as higher temperature, injection pressure and injection speed are often finely adjusted so that the plastic can be filled with the mold without internal stress is generated to cause deformation and cracking of the product.
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 |
The problems in processing:
1.Preparation and drying of raw materials
Since any impurities contained in the plastic may affect the transparency of the product, it is necessary to pay attention to the sealing during the storage, transportation and feeding process to ensure that the raw materials are clean. In particular, the raw material contains moisture, which causes deterioration of the raw material after heating, so it must be dried, and in the injection molding, the drying hopper must be used for the feeding It should also be noted that during the drying process, the input air should preferably be filtered and dehumidified to ensure that the raw materials are not contaminated.
2.Cleaning of the barrel, screw and its accessories
In order to prevent contamination of raw materials or existing materials or impurities in the recesses of screws and accessories, resins with poor thermal stability are present. Therefore, the screw are cleaned before use and after shutdown to prevent impurities from sticking. When there is no screw cleaning agent, the screw can be cleaned with a resin such as PE or PS. When the machine is temporarily shut down, the temperature of dryer and barrel should be lowered to prevent the material from staying at a high temperature for a long time and cause a drop.
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 |
Hard transparent PVC granulator process requirement
The barrel and screw are required to have high wear resistance. Threaded components are manufactured from highly wear-resistant cemented carbide. When uses for glass fiber reinforced processing, it is 6 to 8 times longer than conventional nitrided Steel. The barrel uses a bimetallic bushing to improve wear resistance and extend the life of the barrel. The bimetal bushing is a layer of SL100 high wear-resistant alloy with the thick of 1.5-2.0mm on the inner wall of ordinary steel.
It is especially machined and has a hardness of HRC 58-64. The upper-stage co-rotating twin-screw extruder can be provided with a venting zone to remove moisture, entrained air and volatile components from the material. A sealing element shall be arranged on the screw upstream of the exhaust port to seal the melt to establish a high pressure; in the exhaust zone, that is the screw section facing the exhaust port, the material should be filled in the groove Low and connected to the atmosphere or vacuum pump. In order to seal the melt and establish a high pressure a reverse threaded element, a reverse kneading disc or a pressure regulating value can be used in the venting zone to create a low fullness and thin melt layer, allowing the material to have an exposed free surface and a long residence time to facilitate venting.
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:
