eewa thermoforming
TRANSCRIPT
• Established in 1967
• Export to more than 55 + countries
• Experience of more than 45 years
• Above 250 + Models
• More than 30,000 satisfied customers from all over
India and Overseas
• Primary focus on developing custom-made machinery
to suit all applications and of vast industry.
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• When a thermoplastic sheet is heated it
becomes soft and the techniques for shaping
this sheet are known as thermoforming.
• The term "thermoforming" incorporates a wide
range of possibilities for sheet forming but
basically there are two sub-divisions :
• Vacuum Forming
• Pressure Forming
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• In this processing method a sheet of thermoplastic
material is heated and then shaped by reducing the air
pressure between it and a mould.
• A heater panel is then placed above the sheet and when
sufficient softening has occurred the heater is removed
and the vacuum is applied.
• For the thicker sheets it is essential to have heating from
both sides. A sheet of plastic, which may range in
thickness from 0.025 mm to 4 mm, is clamped over the
open mould.
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This is generally similar to vacuum
forming except that pressure is
applied above the sheet rather
than vacuum below it. This
advantage of this is that higher
pressures can be used to form the
sheet. In recent times this has
become attractive as an
alternative to injection molding for
molding large area articles such as
machine housings.
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• Positive Forming.
In this case a male (positive)
mould is pushed into the
heated sheet before the
vacuum is applied. Fig(2)
• Advantages
This gives a better distribution
of material and deeper shapes
can be formed - depth to width
ratios of 1:1 is possible.
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• This is generally similar to vacuum forming
except that pressure is applied through
pressured hot air and mechanical push down
system which ensures smooth forming. This
advantage of this is that higher pressures can be
used to form the sheet. A typical system is
illustrated in Fig(3) and in recent times this has
become attractive as an alternative to injection
molding for molding large area articles such as
machine housings.
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• PS
• PP
• PE
• PET
• PVC
• HIPS
• ABS
• HDPE
• ACRYLIC
• PC
• ETC…
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• Packaging
• Retail
• Automobile
• Medical
• Signage
• Luggage
• Assembly Lines and More
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• PLC Base
• Plug assist System
• Infrared Ceramic Heater
• Controlled Vacuum –Less Energy Consumption
• Production, Quality in synchronous mode
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• Interlocked Function
– High Productivity & Time
Saving because of Less
Breakdown & Safety
• Symmetry maintain because
of PLC interface & Usage of
Pneumatic System
• Plug assist system
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• Mechanical pressure forming
• Can apply for higher thickness sheet.
• Even sheet thickness is maintained through plug
assist system
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• Efficient heating -
energy saver
• Precise temperature
control compare to
refractory heater
• Good radiant efficiency
• Fast heat up
• Less cool-down time
• Watt density up to 40
watt/sq.Inch
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• Vacuum Resource usage depends upon Production cycle
• Vacuum controlling switch controls vacuum in reservoir, thus energy saving
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