Semi-continuous screen changerHydraulic screen changer manufacturers
GM-SSP series plate type hydraulci screen changer
Why this GM-SSP series slide plate type hydraulic screen changer is called Semi continuous screen changer ?
The semi-continuous hydraulic slide-plate screen changer utilizes a fast-acting hydraulic cylinder to move the screen packs in and out of the melt flow. These kinds of units can be defined as semi-continuous because they allow screen changing without stopping the line, but during that process some off-specification material will be produced.
The advantages to this type of unit are relatively low cost, straight-through, low-pressure loss design, and screen changing without stopping the line. The hydraulic slide plate is a low-cost way to provide screen changing "on the fly" with the disadvantage being the production of some off-spec material due to momentary interruption and air entrainment.
The features of the drip irrigation pipe extrusion line
1, the melt pressure is high, it requires the screen changer /melt filter with high pressure resistant
2, the product is pipe, so the production process is continuous will be better, thus we need a continuous type of screen changer which do not impact the production when cahnge the screen.
Based above features, the screen changer fits for the drip irrigation pipe extrusion machine must be high pressure resistant and continuous type without interrupt production when change the screen.
Actually we have a kind of screen changer owns thes fearturesand advantages:
Single piston continuous screen changer
This kind of screen changer can work with high performance under the pressure 50 Mpa, nd also a continuous type.
So it is the best choice for the drip irrigation extrusion machine.
The following picture show the raw materials and the semi-products of our screen changer
Applications
Blown film and 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)
Blow molding
Pelletizing (strands and underwater)
Recycling of most polymers
Commissioning
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.
Technicial data
| Name |
Hydraulic screen changer for plastic extruder |
| Applicable for |
PS,PE,PP,ABS,PET,,EPE,EPS,XPS,EVA(SOS,PSA) |
| Screen diameter |
70-300mm |
| Raw material |
HIgh quality alloy steel (38CrMoAl) |
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 |
|
| Polishing |
Surfaces depth : 0.03-0.04(μm).
|
| chrome plating |
Depth of chromium-plating:0.05-0.1mm
Hardness of surface after chromium-plating:HV≥950HV |
| Cable connection: |
Close connecting with protection cover |
| Screws |
High strength at 12.9 grade |
| Heating elements |
Stainless steel Cartridge heater and aluminum heating plate |
| Installation |
Confirmed by buyer |
| Payment: |
30% down payment paid by TT upon order signed |
| |
70% to be paid before delivery |
| Delivery: |
40 days after down payment. |
Audited Supplier 
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