Freeze Trim - barwell

a lifetime of reliability and support

The barwell Freeze Trim is a compact range of
time-saving and quality enhancing cryogenic
deflashing machines specifically designed to meet the
most exacting demands of the rubber, plastics and
metal industries.
• A multi-material deflashing solution providing
complete processing flexibility from one machine
• A quality enhancing method of deflashing
• A system which increases productivity due to its
exceptionally fast running speed
• An automated cost-cutting method which
dramatically decreases operational and labour costs
• An environmentally-friendly, safe, reliable and
simple-to-operate machine
Why choose the barwell Freeze Trim
Unwanted flash is created
during moulding when
material overflows the
mould cavity. This is
usually removed by:
rotary tumbling, hand
trimming, punching, using
chemicals or by grinding.
However, these methods are tedious and time consuming
and not always effective. Cryogenic deflashing is by
far the most versatile, effective and economic option.
Improved product quality
The Freeze Trim will produce a high quality part as all
parts are exposed to the blast media ensuring an
even, clean and complete removal of inner and outer
diameter flashing in just one operation. Surface
damage is also avoided e.g. scuffing, scratching and
cut marks.
Increased production and processing flexibility
The fully automated process significantly decreases
deflashing time and increases production. Freeze Trim
offers complete flexibility to multi-material processors.
The use of gaseous
nitrogen to circulate
the media increases
life of the media over
the Auger method of
deflashing.
Simple operation with reliability and easy maintenance
Installation is simple, even when space is limited and
minimal user training is required. Time, tumble speed
and media velocity can be programmed which is
simplified by the latest PLC controls and touch screen
interface with access to a 2000 item database for easy
retrieval of set-up.
Reduced operational costs
Major savings can be achieved on
labour costs due to speed of
operation. Wastage is also
dramatically reduced due to the higher
finish quality. Savings can also be made as the unit
takes up considerably less factory space than most
other processes.
Safe and environmentally friendly
Blast media can be re-used as it is separated from the
flash after production. GN media assist helps to avoid
media from sticking due to moisture. The media can
be used for approx. 300 cycles.
Liquid nitrogen is safely recycled or vented into the
atmosphere.
There is no risk of hand
cutting, as with trimming,
or safety concerns such as;
splash backs from molten
baths or harm from toxic
fumes and dust from
chemical deflashing.

arwell Freeze Trim Operation
How does the Freeze Trim work
Moulded parts are placed in a perforated stainless
steel parts basket and inserted into the blast chamber
of the Freeze Trim. The basket is mechanically rotated
to expose all parts to the blast media.
Liquid nitrogen lowers the temperature while freezing
the rubber to make it brittle. The physical properties of
the parts are not affected during the deflashing process.
The unique high speed impeller directs and throws
the polycarbonate media into the rotating basket.
Travelling at high speed, these small pellets cleanly
trim off the brittle flash leaving a high quality, flash
less moulding.
Processing flexibility and typical applications
• Rubber and plastic parts
• Metal deburring
• Zinc and aluminium castings
• Ideal for ‘O’ rings
• Electronic components
• Medical items
barwell Freeze Trim Options
Capacity options
• Three basket sizes
• 20 litres (usable volume 7 litres)
• 35 litres (usable volume 12 litres)
• 140 litres (usable volume 50 litres)
Features
• 20 000 rpm impeller - hardened for longer life
• High quality Omron motor, controller and PLC
• In-line flash and media separator
• Rigid insulation stabilises ambient temperature
• Does not require a dryer
• Long media life
(approx. 300
cycles)
High Speed Impeller
(up to 20,000rpm)
Touch screen operator interface
• Omron PLC • Multi-language support
• 2000 product database • On screen diagnostics
• Process sheet checklist • “QWERTY” touch keypad
• Password protection • Auto or manual operation
• 8” TFT touch screen • Daily maintenance checklist
• Barcode reader option
Media Flow
Parts Basket
Recommended usable volume
to provide optimum
deflashing results
Basket Rotation
(up to 30rpm)
50mm Rigid Foam
Insulated
Inner Chamber
Media & Flash exit
to Separator

arwell Freeze Trim Technical Data
Feature BFT20 BFT40 BFT140
Refrigerant
Media Flow Systems
Parts Basket Size (diameter)
(depth)
Powered Door
Basket Standard Perforation
Maximum Basket Volume
Usable Volume
Media Throwing Wheel (size)
Media Throwing Wheel (rpm)
Media Type
LN2 @ 212° @ 3.5 bar
GN2 or Clean Dry Air @ 2.5 bar
300 mm
300 mm
No
6.35 mm
20 litres
7 litres
100 mm dia.
Up to 20,000 rpm
Polycarbonate
Liquid Nitrogen (LN2) Cycle Time and Consumption (litres / min)
Cycle Time
(min.)
5
10
15
-45
2.1
4.9
6.3
Temperature (°C)
-75 -100
4.2 6.3
5.6 7.7
8.41 10.5
-120
7.7
9.11
11.91
IMPORTANT: Thickness of flash should not exceed 0.1mm or deflashing may
not be possible.
LN2 @ 212° @ 3.5 bar
GN2 or Clean Dry Air @ 2.5 bar
330 mm
400 mm
Optional
6.35 mm
35 litres
12 litres
100 mm dia.
Up to 20,000 rpm
Polycarbonate
Liquid Nitrogen (LN2) Cool Down
Time and Consumption
Temperature
(°C) range
26 to - 45
26 to - 75
26 to - 100
26 to - 120
Time
(min.)
0.5
1.25
1.37
1.5
Consumption
(litres / min.)
3.5
4.2
4.93
5.96
LN2 @ 212° @ 3.5 bar
GN2 or Clean Dry Air @ 2.5 bar
610 mm
480 mm
Standard
6.35 mm
140 litres
50 litres
150 mm dia.
Up to 20,000 rpm
Polycarbonate
GN2 Vaporiser
Consumption
Time
(min.)
5
10
15
Note: Calculated estimates for BFT40 based nominal basket load factor.
Consumption
(litres / min.)
1.4
2.53
3.65
barwell Support
Barwell provides a lifetime of reliability and support.
barwell Care
Barwell Care options enable Barwell machines to be
effectively serviced and maintained so that they
operate to their full potential.
barwell Training
On commissioning and installation high quality user
training is provided. Barwell also offer tailored training
packages to existing users.
barwell Knowledge
Barwell provide expert advice addressing customers’
specific processing needs by suggesting solutions and
improvements that make life easier. Expert knowledge
can be used by experienced Barwell users or those
considering their first machine.
Barwell always look to help customers make process
and operating savings as well as advising potential
new customers in their machine selection.
Barwell Global Ltd
Contact us to find out more information www.barwell.com
Head Office
Atria Court
60 Papworth Business Park
Stirling Way
Papworth Everard • Cambs
CB23 3GY • England
T: +44 (0) 845 224 3541
F: +44 (0) 845 224 3531
E: info@barwell.com
W: www.barwell.com
China
Barwell China Ltd
No. 115 Xindan Road
Qingpu Industrial Area
Shanghai
China
201706
T: +86 21 3987 6578
E: info@barwellchina.com
W: www.barwell.com
USA, Canada & Mexico
Barwell Machinery USA
2868 Westway Drive
Brunswick
Ohio 44212
USA
T: +1 330 225 9500
F: +1 330 225 9555
E: sales@barwellusa.com
W: www.barwell.com
Brasil
Barwell do Brasil
Equipamentos Para Borracha Ltda
Rua Mariana de Andrade Tavuencas
255 Cep. 18111-400 – JD. Archila
Votorantim / SP – Brasil
T: +55 15 3247 5212
F: +55 15 3247 5212
E: barwell@barwelldobrasil.com.br
W: www.barwell.com
Only Barwell terms and conditions apply. These are available on our website www.barwell.com