Claims
- 1. An injection molding device having a mold cavity defined by movable walls, the device comprising:
- means for injecting pressurized flowable plastic melt into the mold cavity to completely fill the mold cavity;
- means for injecting pressurized gas into an interior of the plastic melt after a part of the plastic melt has cooled along the walls of the mold cavity;
- at least one side cavity arranged outside of the mold cavity and in communication with the mold cavity to receive flowable plastic melt expelled by the injected pressurized gas; and
- means for opening and closing the communication between said at least one side cavity and the mold cavity, wherein said opening and closing means comprises a stuffer having an end which aligns with a wall of the mold cavity which is in communication with said at least one side cavity when said stuffer is in a closed state.
- 2. An injection molding device having a mold cavity defined by movable walls, the device comprising:
- means for injecting pressurized flowable plastic melt into the mold cavity to completely fill the mold cavity;
- means for injecting pressurized gas into an interior of the plastic melt after a part of the plastic melt has cooled along the walls of the mold cavity;
- at least one side cavity arranged outside of the mold cavity and in communication with the mold cavity to receive flowable plastic melt expelled by the injected pressurized gas; and
- means for opening and closing the communication between said at least one side cavity and the mold cavity, wherein said opening and closing means comprises a stuffer having an end which extends into the mold cavity when said stuffer is in a closed state.
- 3. An injection molding device having a mold cavity defined by movable walls, the device comprising:
- means for injecting pressurized flowable plastic melt into the mold cavity to completely fill the mold cavity, said injecting means for said pressurized flowable plastic melt comprising a nozzle, an injection unit, and an associated runner located between the nozzle and the mold cavity;
- means for injecting pressurized gas into an interior of the plastic melt after a part of the plastic melt has cooled along the walls of the mold cavity;
- at least one side cavity arranged outside of the mold cavity and in communication with the mold cavity to receive flowable plastic melt expelled by the injected pressurized gas, said at least one side cavity comprising an interior portion of the nozzle, an interior portion of the injection unit, and the associated runner; and
- means for opening and closing a communication between at least one other side cavity and the mold cavity, wherein said opening and closing means comprises a stuffer having an end which aligns with a wall of the mold cavity which is in communication with said at least one other side cavity when said stuffer is in a closed state.
- 4. An injection molding device having a mold cavity defined by movable walls, the device comprising:
- means for injecting pressurized flowable plastic melt into the mold cavity to completely fill the mold cavity, said injecting means for said pressurized flowable plastic melt comprising a nozzle, an injection unit, and an associated runner located between the nozzle and the mold cavity;
- means for injecting pressurized gas into an interior of the plastic melt after a part of the plastic melt has cooled along the walls of the mold cavity;
- at least one side cavity arranged outside of the mold cavity and in communication with the mold cavity to receive flowable plastic melt expelled by the injected pressurized gas, said at least one side cavity comprising an interior portion of the nozzle, an interior portion of the injection unit, and the associated runner; and
- means for opening and closing a communication between at least one other side cavity and the mold cavity, wherein said opening and closing means comprises a stuffer having an end which extends into the interior of the mold cavity when said stuffer is in a closed state.
Priority Claims (1)
Number |
Date |
Country |
Kind |
3913109 |
Apr 1989 |
DEX |
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Parent Case Info
This application is a divisional application of application Ser. No. 511,764, filed Apr. 20, 1990.
US Referenced Citations (4)
Foreign Referenced Citations (3)
Number |
Date |
Country |
2106546 |
Aug 1972 |
DEX |
2800482 |
May 1982 |
DEX |
2139548 |
Nov 1986 |
GBX |
Divisions (1)
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Number |
Date |
Country |
Parent |
511764 |
Apr 1990 |
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