FR2381616A1 - Multipurpose injection moulding machine - with twin independent screws plasticising for ram packed mould tool - Google Patents
Multipurpose injection moulding machine - with twin independent screws plasticising for ram packed mould toolInfo
- Publication number
- FR2381616A1 FR2381616A1 FR7706332A FR7706332A FR2381616A1 FR 2381616 A1 FR2381616 A1 FR 2381616A1 FR 7706332 A FR7706332 A FR 7706332A FR 7706332 A FR7706332 A FR 7706332A FR 2381616 A1 FR2381616 A1 FR 2381616A1
- Authority
- FR
- France
- Prior art keywords
- screw
- injection moulding
- moulding machine
- plasticising
- mould tool
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/47—Means for plasticising or homogenising the moulding material or forcing it into the mould using screws
- B29C45/48—Plasticising screw and injection screw comprising two separate screws
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/03—Injection moulding apparatus
- B29C45/13—Injection moulding apparatus using two or more injection units co-operating with a single mould
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/57—Exerting after-pressure on the moulding material
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
An injection moulding machine features two separate reciprocating screw plasticisation units which converge on to the axis of sprue passage leading from a mutual screw discharge chamber to the mould cavity. Aligned with the sprue passage is a piston which can advance to seal the passage and maintain the moulding consolidation or dwell pressure while the screw units are able to retract and masticate fresh material for the next shot. Suitable in principle for injection moulding thermoplastic, thermosetting or elastomeric materials. The minimum cycle time is not restricted by the period necessary for mastication of material. Hot residence times and consequent degradation can be minimised by matching the screw throughput capacity to individual alternate shots. The piston provides a better moving seal than a flighted screw.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7706332A FR2381616A1 (en) | 1977-02-25 | 1977-02-25 | Multipurpose injection moulding machine - with twin independent screws plasticising for ram packed mould tool |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7706332A FR2381616A1 (en) | 1977-02-25 | 1977-02-25 | Multipurpose injection moulding machine - with twin independent screws plasticising for ram packed mould tool |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2381616A1 true FR2381616A1 (en) | 1978-09-22 |
FR2381616B1 FR2381616B1 (en) | 1979-09-28 |
Family
ID=9187532
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7706332A Granted FR2381616A1 (en) | 1977-02-25 | 1977-02-25 | Multipurpose injection moulding machine - with twin independent screws plasticising for ram packed mould tool |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2381616A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0673741A1 (en) * | 1994-03-22 | 1995-09-27 | BMB S.p.A. | Improvement in the injection unit in presses for the injection molding of plastic materials |
DE10055692A1 (en) * | 2000-11-06 | 2002-05-16 | Demag Ergotech Gmbh | Injection moulding unit consists of fixed and movable tool tensioning plates, primary and secondary injection units, a carrier, guide element and support and holding rods |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT391294B (en) * | 1988-09-19 | 1990-09-10 | Engel Gmbh Maschbau | Injection-moulding nozzle |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2246278A2 (en) * | 1973-10-05 | 1975-05-02 | Liberas Rene | Compsns for treatment of diarrhoea - contg dried yeast, yeat autolysate and a lyophilisation protector |
US3940223A (en) * | 1973-12-21 | 1976-02-24 | Farrell Patent Company | Injection of plastic in molding machine |
-
1977
- 1977-02-25 FR FR7706332A patent/FR2381616A1/en active Granted
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2246278A2 (en) * | 1973-10-05 | 1975-05-02 | Liberas Rene | Compsns for treatment of diarrhoea - contg dried yeast, yeat autolysate and a lyophilisation protector |
US3940223A (en) * | 1973-12-21 | 1976-02-24 | Farrell Patent Company | Injection of plastic in molding machine |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0673741A1 (en) * | 1994-03-22 | 1995-09-27 | BMB S.p.A. | Improvement in the injection unit in presses for the injection molding of plastic materials |
DE10055692A1 (en) * | 2000-11-06 | 2002-05-16 | Demag Ergotech Gmbh | Injection moulding unit consists of fixed and movable tool tensioning plates, primary and secondary injection units, a carrier, guide element and support and holding rods |
DE10055692C2 (en) * | 2000-11-06 | 2002-10-10 | Demag Ergotech Gmbh | Device for the injection molding of several materials |
Also Published As
Publication number | Publication date |
---|---|
FR2381616B1 (en) | 1979-09-28 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |