Shannon HRP 220, User Manual

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User’s Guide
HRP 220 - 5 -
HS
Description of the machine
The
Shannon HRP
plastic bending-machine is a rapidly
convertible semi-automatic machine for the production of large
series of items with multiple bends for the plastic sheet
processing industry.

The machine has four adjustable heating elements as
standard, the temperature of which can be adjusted by
electronic controls.

The filaments of the heating elements on the working
surface are adjustable in height. The other elements, which
are mounted in the pneumatically operated top frame which
clamps the workpiece in place, are adjustable in height as a
single unit in respect of the working surface.

The workpiece can be heated from two sides, considerably
reducing the production cycle time and making it possible to
bend sheet up to 20 mm thickness.

The top frame is switched on independently of the control
units and is controlled by an adjustable timer.

The working surface is made of scratch-resistant solid core
material with which the space between the zones to be
heated can be filled to support the plastic sheet.

The machine has facilities for the mounting of additional
heating elements at both top and bottom. The elements can
be mounted by the user.
When heated, thermoplastics become so flexible that they can
be shaped. When a plastic sheet is heated to its softening point
in a narrow zone, if can be bent to any angle desired.
The bending radius is determined by the width of the heated
zone. The zone is determined by the thickness of the material,
the type of heating element and the distance between the
plastic and the filament.
Every plastic has its specific softening point. By co-ordinating
the temperature, heated zone and heating time all kinds of
thermoplastic can be processed.
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