34
Tools
NOTES:
Porous mould materials such as wood and plaster should be properly sealed to prevent the vacuum pump
from sucking out any moisture or sawdust, loose plaster etc. The vacuum circuit may quickly become blocked
with dust or slurry if moulds are not properly sealed.
As the plastic cools after forming it will contract, gripping the tool tightly. If the tool has been made with
sloping sides and has a good surface finish it will release more easily. Where the draft angle must be kept to
a minimum a release agent may be used to assist release.
Sealed moulds will usually release more easily. Silicon based release agents may be used on more difficult
moulds. Silicon based release agents are rapidly absorbed by porous (unsealed) moulds, rendering them
ineffective. The use of talc as a release agent is not recommended. It may clog the vacuum circuit.
The baseboard can be made from either MDF or aluminium and needs to be 12.00mm (1/2”) thick. The
vacuum hole can be 30.00mm diameter and needs to be positioned 94mm forward of the centre of the
table.
30mm
94mm
The baseboard has to be 4mm shorter in
both directions than the forming aperture
of the machine e.g. Forming aperture
280mm x 430mm = baseboard size
276mm x 426mm.
686 standard baseboard
641mm (25.23”)
615mm (24.21”)
Make board 4mm ( 0.15”) smaller
than reducing window aperture in
both directions
213.5mm (8.40”)
12mm (1/2”)
320.5mm (12.61”)
Use four M6 cap head set screws
or M6 CSK machine screws x 19mm (3/4”)
long to bolt the board to the table (platen)
596mm (23.46”)
570mm (22.44”)
7mm (.275”) Diameter holes
R15mm (0.59”)
686 standard base board
Centre of board
position
92.5mm (3.64”)
307.5mm (12.10”)
R2mm (0.078”)radius on
top edge all round to stop
MDF from flaking
Make board 4mm ( 0.15”) smaller
than fill size aperture front to back
and left to right
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