Patents Assigned to Im-Pak Technologies Limited
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Patent number: 7588437Abstract: A mould for injection compression moulding of an article includes two mould parts mounted on two relatively movable platens of an injection moulding machine and defining between them a cavity. A first mould part is supported on a first of the two platens in such a manner that it is capable of tilting out of parallel with the first platen. The first mould part is rigidly connected to at least one axially extending support bar which engages at its first end with a guide surface mounted in fixed relation to the first platen and which slidably engages at its second end with a guide surface mounted in fixed relation to the second platen, whereby in the closing stages of the mould, the weight of the first mould part is carried by the support bar while resting on both platens.Type: GrantFiled: October 1, 2006Date of Patent: September 15, 2009Assignee: IM-Pak Technologies LimitedInventor: Peter Clarke
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Patent number: 7563093Abstract: An injection compression moulding apparatus comprises two mould parts which define a mould cavity and are mounted on two relatively movable platens of an injection moulding press. An actuator is arranged in series with the platen action on at least one of the mould parts and is controlled in synchronism with the movement of the platens to enable the relative speed of the two mould parts during a mould closing phase of each article moulding cycle to be modified, the speed of relative movement of the mould parts being the vector sum of the speeds of movement and the platens and the actuator.Type: GrantFiled: May 30, 2006Date of Patent: July 21, 2009Assignee: Im-Pak Technologies LimitedInventor: Peter Clarke
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Publication number: 20090130244Abstract: A mould for injection compression moulding of an article includes two mould parts mounted on two relatively movable platens of an injection moulding machine and defining between them a cavity. A first mould part is supported on a first of the two platens in such a manner that it is capable of tilting out of parallel with the first platen. The first mould part is rigidly connected to at least one axially extending support bar which engages at its first end with a guide surface mounted in fixed relation to the first platen and which slidably engages at its second end with a guide surface mounted in fixed relation to the second platen, whereby in the closing stages of the mould, the weight of the first mould part is carried by the support bar while resting on both platens.Type: ApplicationFiled: October 1, 2006Publication date: May 21, 2009Applicant: IM-PAK TECHNOLOGIES LIMITEDInventor: Peter Clarke
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Publication number: 20080265466Abstract: A mould for mounting between the relatively movable platens of an injection moulding press for injection impact compression moulding of an article includes a cavity plate formed with a depression, a core plate having a projecting core at least part of the outer surface of which is cylindrical and a closure plate movable relative to the core plate and the cavity plate and having a surface in sealing contact with the cylindrical outer surface of the core. A locking mechanism is provided to lock the closure plate relative to the cavity plate while permitting the core plate to move relative to the cavity plate.Type: ApplicationFiled: October 1, 2006Publication date: October 30, 2008Applicant: IM-PAK TECHNOLOGIES LIMITEDInventor: Peter Clarke
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Publication number: 20080213424Abstract: An injection compression moulding apparatus comprises two mould parts which define a mould cavity and are mounted on two relatively movable platens of an injection moulding press. An actuator is arranged in series with the platen action on at least one of the mould parts and is controlled in synchronism with the movement of the platens to enable the relative speed of the two mould parts during a mould closing phase of each article moulding cycle to be modified, the speed of relative movement of the mould parts being the vector sum of the speeds of movement and the platens and the actuator.Type: ApplicationFiled: May 30, 2006Publication date: September 4, 2008Applicant: IM-PAK TECHNOLOGIES LIMITEDInventor: Peter Clarke
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Patent number: 7090800Abstract: A mold, a molding machine and a method of molding a plastics material in a mold cavity is described which relies primarily on movement of a part of the mold to provide the pressure necessary to force the plastics material melt to fill all the parts of the mold cavity. The method comprises the steps of applying a light pressure to close the mold, injecting a predetermined quantity of molten plastics material into the mold cavity at a pressure which is such that the injection of the plastics material can cause the cavity to expand in volume against the resistance of the light closing pressure, and applying a high pressure to close the mold fully after completion of the injection step.Type: GrantFiled: January 25, 2002Date of Patent: August 15, 2006Assignee: Im-Pak Technologies LimitedInventor: Peter Reginald Clarke