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PLASTIC TRADE INJECTION MOULDING OF ALL MATERIALS BY B.P.Y. PLASTICS
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Moulding Plastics - How is it
done? |
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HOME |
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SERVICES |
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Injection moulding is the process
of forcing melted plastics into a mould cavity. |
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TEAM |
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Once the plastic has cooled,
the part can be ejected. Injection moulding is often used in mass |
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PROFILE |
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production and
prototyping. |
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TESTIMONIALS |
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Injection moulding is
a relatively new way to manufacture parts. The first
injection moulding machines |
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OUR RECYCLING |
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were built in the
1930’s. |
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LOCATION |
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CONTACT |
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There are six major steps to
the process; |
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PVC
FASCIA CORNERS |
1. Clamping |
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&
JOINERS |
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The injection moulding machine
consists of three basic parts. The mould plus the clamping and
injection
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PUB
PROMOTIONS |
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units. The clamping
unit is what holds the mould under pressure during the injection and
cooling.
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GOLF CLUB TAGS |
Basically it holds
the two halves of the mould tool together. |
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PLASTICS
in the |
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CONCRETE
INDUSTRY |
2. Injection |
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PRODUCTS
PAST |
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During the injection phase,
plastic material, usually in the form of pellets are loaded into a hopper
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PRESENT |
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attached to the injection unit. The pellets feed into the cylinder where
they are heated until they reach |
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molten form. Within the heating cylinder there is a motorized screw that
mixes the molten pellets and
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PLASTIC MATERIALS |
forces them to the end of the cylinder. Once enough material is accumulated
in front of the screw the
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THE PROCESS |
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injection process begins. The molten plastic is then forced into the closed
and clamped mould by the
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APPLICATION |
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screw and is controlled by speed and pressure. |
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GENERAL RECYCLING |
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USEFUL LINKS |
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3. Dwell |
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The dwelling phase consists of a
pause in the injection process (sometimes called hold on time) the |
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molten plastic has
been injected into the mould and the pressure is
applied to make sure all of the |
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cavity is filled |
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4. Cooling |
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The plastic is allowed to cool in
the mould cavity, aided by water cooling running through
the mould. |
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5. Mould open |
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The clamping unit is opened, thus
separating the two halves of the mould tool. |
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6. Ejection |
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The mould tool is fitted with pins
internally to push out the moulding. |
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An Injection
Moulding Machine |
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Copyright © BPY Plastics Ltd.
2006 -
Legal -
Private Policy -
Conditions of sale |
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