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US 2013/0224508 A1Published application
Compressed Injection Molding
AssigneeMeiban International Pte. Ltd.
InventorsPierre Louis Todesco, Carol Su Lin Goh
Life of this patent
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Abstract
The application provides a molding apparatus. The molding apparatus comprises a first mold-defining member together with a second mold-defining member, one or more channels, and one or more moveable cores. The first mold-defining member together with the second mold-defining member defines an internal cavity. The channels comprise inlets for receiving molten resin and outlets to the internal cavity. The moveable cores are moveable between a first position and a second position, wherein the moveable core in the second position reduces a volume of the internal cavity and closes the channel outlets. The moveable core is also independently moveable with respect to the first mold-defining member and with respect to the second mold-defining member.
Claims30
A method of producing an injection molding comprising
- injecting a predetermined volume of a molten resin into an internal cavity of a die assembly, wherein the molten resin flows into the internal cavity via an outlet of a resin channel,
- advancing a moveable core into the internal cavity, such that the volume of the internal cavity is reduced,
- applying a pre-determined pressure on the molten resin within the internal cavity by the moveable core,
- measuring a property of the moveable core, and
- adjusting the predetermined volume of a molten resin for a subsequent injecting when the property of the moveable core is different from a pre-determined value of the property of the moveable core, wherein the advancing of the moveable core is done such that the moveable core closes the outlet of the resin channel.
2 more elements
A molding machine comprising
- a molding apparatus comprising
- a first mold-defining member and a second mold-defining member, wherein the first mold-defining member together with the second mold-defining member defines an internal cavity in a closed state of the molding apparatus,
- at least one channel, the channel comprising a channel inlet for receiving molten resin and a channel outlet for delivering the molten resin to the internal cavity,
- at least one moveable core being moveable between a first position and a second position, and
- a mechanism for actuating the moveable core,
- wherein the mechanism comprises a positional sensor,
- wherein the at least one moveable core in the second position reduces a volume of the internal cavity, and
- wherein the at least one moveable core is independently moveable with respect to the first mold-defining member and with respect to the second mold-defining member,
- a mold injection device for providing molten resin to the molding apparatus,
- a machine bed for supporting the molding apparatus and the mold injection device, and
- a control unit, wherein the control unit comprises a port for controlling the mold injection device according to a positional data of the molding apparatus,
- wherein the at least one moveable core in the second position closes the channel outlet.
9 more elements
A molding machine comprising
- a molding apparatus comprising
- a first mold-defining member and a second mold-defining member, wherein the first mold-defining member together with the second mold-defining member defines an internal cavity in a closed state of the molding apparatus,
- a first channel, the first channel comprising a first channel inlet for receiving molten first resin and a first channel outlet for delivering the molten first resin to the internal cavity,
- a second channel, the second channel comprising a second channel inlet for receiving molten second resin and a second channel outlet for delivering the molten second resin to the internal cavity,
- at least one moveable core being moveable between a first position and a second position, and
- a mechanism for actuating the moveable core,
- wherein the mechanism comprises a positional sensor,
- wherein the at least one moveable core in the second position reduces a volume of the internal cavity, and
- wherein the at least one moveable core is independently moveable with respect to the first mold-defining member and with respect to the second mold-defining member,
- a first mold injection device for providing the molten first resin to the molding apparatus,
- a second mold injection device for providing the molten second resin to the molding apparatus,
- a machine bed for supporting the molding apparatus, the first mold injection device and the second mold injection device, and
- a control unit, wherein the control unit comprises
- a first port for controlling the first mold injection device according to a first positional data of the molding apparatus and
- a second port for controlling the second mold, injection device according to a second positional data of the molding apparatus,
- wherein the at least one moveable core in the second position closes the first channel outlet and closes the second channel outlet.
13 more elements
A method of producing an injection molding comprising
- providing a layer of first resin and
- providing a layer of second resin that is provided next to the first resin layer,
- wherein the providing of the layer of first resin comprises
- injecting a predetermined first volume of a molten first resin into an internal cavity of a die assembly, wherein the molten first resin flows into the internal cavity via a first outlet of a first resin channel,
- forming the layer of first resin by advancing a moveable core into the internal cavity to apply a pre-determined first pressure on the molten first resin, such that the volume of the internal cavity is reduced, the advancing of the moveable core is done such that the moveable core closes the first outlet of the first resin channel, and
- measuring a first position of the moveable core,
- wherein the providing of the layer of second resin comprises
- injecting a predetermined second volume of a molten second resin into the internal cavity of the die assembly, wherein the molten second resin flows into the internal cavity via a second outlet of a second resin channel,
- forming layer of second resin by advancing the moveable core into the internal cavity to apply a pre-determined second pressure on the molten second resin, such that the volume of the internal cavity is reduced, the advancing of the moveable core is done such that the moveable core closes the second outlet of the second resin channel, and
- measuring a second position of the moveable core,
- the method further comprises,
- adjusting the predetermined first volume of the molten first resin for a subsequent injecting when the position of the moveable core is different from a pre-determined first position, and
- adjusting the predetermined second volume of the molten second resin for a subsequent injecting when the position of the moveable core is different from a pre-determined second position.
10 more elements
A molded plastic part comprising
- a first resin layer and a second resin layer being provided by a first channel of a molding apparatus, and
- an intermediate resin layer being provided by a second channel of the molding apparatus,
- wherein
- the first resin layer, the second resin layer, and the intermediate resin layer are provided such that the intermediate resin layer is adjacent to the first resin layer and to the second resin layer and that the intermediate layer separates the first resin layer from the second resin layer.
1 more element
A molded plastic part comprising
- a first component layer and a second component layer being provided by a first channel of a molding apparatus, and
- an intermediate component layer being provided by a second channel of the molding apparatus,
- wherein
- the intermediate component layer is provided adjacent to the first cornponent layer and to the second component layer such that the intermediate component layer separates the first component layer from the second component layer.
1 more element
Dependencies are inferred from the claim text.