Injection molding device with intermediate storage space
AssigneeKrauss-Maffei Kunststofftechnik GmbH
InventorsErwin Bürkle, Hans Wobbe, Walter Wohlrab
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Abstract
An injection molding device includes a continuously operating extruder and a discontinuously operating injection unit receiving plastic material from the extruder. The extruder has an extruder barrel which includes a plasticizing zone and a discharge zone, whereby the discharge zone is configured to provide an intermediate storage space and has a cross sectional area which is greater than a cross sectional area of the plasticizing zone. In this way, the discharge zone provides a buffer volume which is filled during the injection process and then emptied again.
Claims10
An injection molding device, comprising:
- a discontinuously operating injection unit;
- and
- a continuously operating extruder having an extruder barrel which includes a plasticizing zone for plasticizing incoming plastic material and a discharge zone for discharging plasticized material into the injection unit, said extruder including an extruder screw which is received in the barrel and has a screw channel, wherein the screw channel of the extruder screw in the discharge zone has a channel depth which is greater than a channel depth in the plasticizing zone so as to provide an intermediate storage space which forms a buffer zone for plasticized material with a free volume that receives and empties in a cycle with an injection process.
An injection molding device, comprising:
- a discontinuously operating injection unit;
- and
- a continuously operating extruder linked directly to the injection unit and having an extruder barrel which includes a plasticizing zone for plasticizing incoming plastic material and a discharge zone for discharging plasticized material into the injection unit, said extruder including an extruder screw which is received in the barrel and has a screw channel, wherein the screw channel of the extruder screw in the discharge zone has a channel depth which is greater than a channel depth in the plasticizing zone so as to provide an intermediate storage space.
Dependencies are inferred from the claim text.