Screen changer

Screen changer
4
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In the field of extrusion of any type of plastics, contaminants in molten
materials are inacceptable, they do not only influence the quality of product, but also render the
process more difficult. Therefore, it is important to assure perfect filtration without decreasing
the quality of molten material.
Our screen changers stand out among others thanks to the following features:
•
Filter easy to operate
•
Changer easy to maintain
•
Durable and resistant to wearing structure
•
Tightness
•
Low energy need
•
Our experience is reflected in the quality
Screen changers are used to produce e.g.:
•
Sections
•
Fibres, tapes, films
•
Granulation, re-pelletization, microgranulation
•
Masterbatches and other substances
•
Injection and other moulding processes
•
Connected with toothed pump to protect it
•
Extrusion of foams and foamed films
We offer new and used screen changers and we provide repair and complete technical services
for all screen changers.
Additionally, we offer repair services for screen changers and spare parts.
We possess all filtering systems according to the needs of our customers, among others:
•
Simple
•
Semiautomatic
•
Automatic and self-cleaning
•
Slide and plate of 1 and 2 sockets
•
Bolt screen changer of 1 and 2 sockets with round and oval screens
•
Bolt screen changer with 1 or many bolts
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Screen changers: Rotary
Plastics processing consists in melting polymers and moulding to a desired shape.
It can be made thanks to :
•
•
•
•
•
Drainage
Rotary moulding (barrels, containers)
Injection moulding
Extrusion
Foaming (polystyrene foam)
The process of plastics melting itself using an extruder or injector is a relatively easy
process, the omission of filtration process is the one that so often cause many technologic troubles.
Bad chosen system forces us to stop the production, disassemble the support of filter
screen, change the screen and restart production once again.
Filtration systems can be divided into:
• Permanently installed filter support
•
Replaceable slide filter charge with 1 or many sockets made of a disc or a tang
•
Auto-screen system with slide filter screen
Disc systems
Regular and self-cleaning systems
Our company specialize in the production of disc
systems and rotary filters including recycling
of rigid PVC.
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Screen changers
•
•
Screen changers: Rotary
F 45
Efficiency
(kg/h)
120
Max pressure
(bar)
500
F 60
220
500
35
115
230 / 400
2,2
F 75
310
500
45
220
230 / 400
5,8
F 90
550
350
70
460
230 / 400
7,3
F 150
1430
350
180
550
230 / 400
8,0
F 175
2080
350
250
1200
230 / 400
12,0
F 200
2850
300
320
1680
230 / 400
-
F 250
4070
250
500
2300
230 / 400
-
Symbol
F60 / F75
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Filtration area
(cm2)
19
F150
Weight
(kg)
75
Power supply
Power of
(V)
heaters (kW)
230 / 400
1,9
F175
Screen changers: one and two piston
SCREEN CHANGER
CHARACTERISTICS:
Round and oblong filter screen on one piston. Flow ducts
of very good flow quality, thanks to which it is suitable to
all types of thermoplastics and many special applications.
APPLICATION:
•
In the process in which changes on filter screen
are rarely needed.
CONTINOUS SCREEN CHANGER
CHARACTERISTICS:
Screen changers
Continuous operation means that, in the changer
the piston which remains in the casing has good enough
capacity to handle complete material flow. After the screen
change, air bleeding takes place in order to avoid closed
air which would disturb filtration.
APPLICATION:
•
•
•
Two round items of parallel filter screens on separate piston
(rule of two changer pistons)
Material output according to size vary between 5 to 26.000 kg / h
Flow ducts are very good and suitable to almost all types of thermoplastics
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Screen changers: one and two piston
AUTOMATIC SELF-CLEANING SCREEN CHANGER
CHARACTERISTICS:
In order to increase considerably filter’s life-span, we offer
automatic screen changers with self-cleaning function.
These systems work as follows: When the level of contamination is reached, the automatic screen back washing
is turned on.
Next, the contamination are disposed from the device
through a an overflow duct. Contaminated mass
is disposed through heating outlet pipes which are installed
in the changer casing.
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Screen changers: slide plate
Slide screen changer, called also disc screen changer. Designed with a soft insulating system.
• It operates with single and twin screw extruders, applied in production of most polymers
of high productivity.
• Screen change lasts around 2 sec, and the filter volume vary between Ø50 and Ø400.
• Thanks to precise processing, the changer maintains very high pressure and ensures big filter surface and the effective result of filtration.
• Perfect performance in high temperature of 300ºC and high level of pressure of 250-300 bars.
• Applicable for PP, PE, PS, ABS, PET production etc.
Breaker plate
Podpora filtra suwakowego
Screen changers
Slide plate
Płyta filtra suwakowego
Supporting screen
Sito podporowe
Fine screen
Sito filtracyjne
Coarse screen
Sito ochronne
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Screen changers: slide plate
L3
L2
P 70
Efficiency
(kg/h)
60-200
Hole diameter
(mm)
70
P 100
130-350
100
78
138
230 / 400
6,8
P 120
190-500
120
113
170
230 / 400
7,4
P 150
350-800
150
176
280
230 / 400
8,6
P 180
450-1250
180
254
330
230 / 400
9,5
P 200
550-1500
200
314
370
230 / 400
10,7
P 250
800-2500
250
490
450
230 / 400
11,7
Symbol
P 70
L1 (mm)
170
L2 (mm)
100
L3 (mm)
715
P 100
185
110
815
P 120
205
130
880
P 150
235
150
990
P 180
245
160
1035
P 200
P 250
280
300
180
225
1155
1260
Symbol
L3
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Filtration area
(cm2)
38
L1
L2
Weight
(kg)
100
Power supply
Power of
(V)
heaters (kW)
230 / 400
5,9
L1
PVC granulation
The line is designed for the pellet and re-pellet production obtained from plastics,
especially focused on PVC processing. It is adjusted to cooperate with single and twin screw
extruders.
PVC granulation
The line consists of :
•
Screen changers, thanks to which our final product is cleaned from contamination
before granulation head. It permits the production of high quality and cleanliness
level pellets
•
Pelleting head customized for every client according to the requirements of pellet size and performance.
•
Cutting set, during the work, it permits a clear preview of pellet production
and it gives opportunity to separate the set and pelleting head, and a simple and quick cutting knife change in regard to all safety requirements.
•
Transport hopper possible to connect with big bag transport machines.
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PVC granulation
Cutting set
•
security casing
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knife
•
transport hopper
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Pelleting head
•
customized for every cus
tomer according to requirements of
size and performance pellets
Screen changer
•
adjusted to performance requirements
Regeneration
We offer repair service for all screen changes and their complete technical service. We specialize
in regenerating worn-out and damaged elements.
Thanks to many years of our experience, our products are characterized by high quality and
customers’ satisfaction.
We possess a construction office (CAD systems based on Solid Works 3D program) and we provide consulting services within technical solutions and machine facilities in plastic processing
industry with the emphasis on filtration process.
We repair as well as select new details based on damaged, worn-out or presented in the customer’s documentation ones.
Examples of 3D detail visualization made
for our customers:
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Connection flanges
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Connectors
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additional holes in details e.g.
under melt pressure transducer
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Screws for extruders
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Pelletiser and mill knives
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Lids, protection covers
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Immersion heaters for machines
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Different types of machine elements
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etc.
- Damaged detail
- Customer’s arrangements
- Measurements
- Technical drawing
Regeneration
We prepare a 3D visualization of details
and we adjust our machines to the customer’s
connection.
- Detail production
order
- Ready detail
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Regeneration
Repair
Detail
production
Machine
regeneration
Regeneration
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