PET recycling extruder/continuous screen changer


Benefits of this  GM-DP-R series  continuous screen changer for extruder
Increased production
Reduced downtime & scrap
Leak-free operation
Increased filtration area
Reduced inlet pressures
Accurate, repeatable screen changes
Reduced maintenance

Technical data
1)The main body of the screen changer
Raw material:alloy steel(38CrMoAlA)
Surface treatment:Nitriding treatment
Depth of Nitrated Layer: 0.40-0.70mm
Nitrided hardness:950-1050Hv
Fragility of nitration: Less than grade 1
 
Flow channel treatment: chrome plated
Depth of chromium-plating:0.05-0.1mm
Hardness of surface after chromium-plating:HV950HV
 
2)Drive system:Hydraulic unit:

3)Control system
Electrical controlling system: warnning device,pressure and temperature transducer, are included

Product show


Features

Two round  removable breaker plates on each bearing piston
"Continuous type" means operation of screen change without machine halt or disruption of melt flow.
Fit for almost all kinds of polymers
It works well under the high pressure 400bar(40Mpa) not impact the high performance.
The filtration screen area covers from 56cm² to 520cm², depending on the size, fit for output range from 30kg/h to 1800kg/h.

Benifits of this kind of continuous screen changer

continuous operation
Leak-free mold of operation
Customized design adapters
optional choice of installation ways
Simply controll by a easy operated control handle
Reasonable price and proved technology
Working principle of this GM-DP-R series continuous screen changer

As the polymer melt enters the main body ofthe screen changer, the melt stream is divided equally and flows into the two channels ,go through the two breaker plates, and the impurities are intercepted by the screen mesh, and when screen changing is required, one of the pistons with blocked screen pack is pushed out by hydraulic unit , and the other is still on the working position, we replace the fresh screen and then the piston with new screen is pushed into the working position, at this time, the air bleeding system also begin to work.  The other piston screen change is the same with above.  This type of continuous screen changer maintains a continuous melt flow.

Applications 
 
Cast film (Bubble pack/ Medical/Food Wrap)
Sheet (Foam/Strapping/Plastic cardboard)
Coating (Hot melt adhesive)
Pipe ( Corrugated/Gas Pipe) and profile
Compounding (Master batch/filler)
Wire and cable extrusion
Tubing (Medical/Industrial/Irrigation)
Fibers ( Monofilament/non-woven fabrics)
Pelletizing (strands and water-ring pelletizing)
Recycling of most polymers


Quality inspection
   We take only first-class steel and check every production procedure to ensure every dimension is produced precisely. A final complete inspection will be executed  before delivery.   we guarrantee that every set of scren changer   from our factory is the best quality.


 
 
Commissioning
We provide the operation manual for customers to gudie to install the screen changer, and at the requirement of user, salers should send technician to install and commissioning the die at site of Buyers, expenses of the trip should be borne by Buyers.
 
After-sales service
12 months with proper operation by user, all the spare parts shall be replaced free of charge under guarantee period, fee for transportation and packing will be borne by users.

Technical dataAbout Gmach 
Gmach Factory



Gmach certificate