GB1375883A - - Google Patents
Info
- Publication number
- GB1375883A GB1375883A GB3069372A GB3069372A GB1375883A GB 1375883 A GB1375883 A GB 1375883A GB 3069372 A GB3069372 A GB 3069372A GB 3069372 A GB3069372 A GB 3069372A GB 1375883 A GB1375883 A GB 1375883A
- Authority
- GB
- United Kingdom
- Prior art keywords
- plunger
- dies
- force
- cavities
- alternately
- 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.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
- B30B11/22—Extrusion presses; Dies therefor
- B30B11/26—Extrusion presses; Dies therefor using press rams
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/475—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using pistons, accumulators or press rams
- B29C48/48—Two or more rams or pistons
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Press Drives And Press Lines (AREA)
Abstract
1375883 Ram extrusion press WERNER & PFLEIDERER 30 June 1972 [17 Aug 1971] 30693/72 Heading B5A A pair of cavities 4, 5 is provided in a member 9 which is rotatable alternately in opposite directions and vertically displaceable, with respect to a shaft 10, alternately to locate the cavities 4, 5 upon dies 3, 4 which respectively define with each cavity a compression mould in which a plastic or pulverulent material is pre-compacted by a plunger 7, and an orifice 13 through which the pre-compacted material is extruded by a plunger 6. The member 9 is raised and lowered into sealing contact with the dies 2, 3 by a device (not shown), and difficulties in sealing between the dies 2, 3 and cavities 4, 5, arising from the dimensional tolerances of the apparatus, are minimized by mount ing at least one of the dies 2, 3 for vertical displacement downwardly against a force P2, exerted in opposition to that P1 of the plunger 7 or plungers and which in the described embodiment is provided by a plunger 15 loaded by a spring 18 and by the same hydraulic pressure as actuating the plunger 7. The force upward P2 is balanced by the force P1 of the plunger 7 and that P3 comprising the weight of the member 9 and any force of an hydraulic lowering device acting thereon. Means are provided for limiting the extent of the alternating rotation of the member 9.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2141072A DE2141072C3 (en) | 1971-08-17 | 1971-08-17 | Hydraulic extrusion press for pressing out plastic and / or powdery substances |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1375883A true GB1375883A (en) | 1974-11-27 |
Family
ID=5816912
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3069372A Expired GB1375883A (en) | 1971-08-17 | 1972-06-30 |
Country Status (3)
Country | Link |
---|---|
DE (1) | DE2141072C3 (en) |
FR (1) | FR2150121A5 (en) |
GB (1) | GB1375883A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2145654A (en) * | 1983-09-01 | 1985-04-03 | Heumann Ludwig & Co Gmbh | Production of granulates |
WO1990012251A1 (en) * | 1989-04-12 | 1990-10-18 | William Roland Milner | Method and apparatus for waste treatment |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2855899C2 (en) * | 1978-12-23 | 1983-11-10 | Mannesmann AG, 4000 Düsseldorf | Holding device for a carbon electrode line |
DE3243184C2 (en) * | 1982-11-23 | 1985-04-04 | Joachim Kreyenborg & Co, 4400 Münster | Nozzle changing device for plastic extruders |
EP0799684A1 (en) * | 1996-04-03 | 1997-10-08 | Zw Hydraulik Ag | Preformer with two or several extrusion cylinders revolving around an axis |
-
1971
- 1971-08-17 DE DE2141072A patent/DE2141072C3/en not_active Expired
-
1972
- 1972-06-30 GB GB3069372A patent/GB1375883A/en not_active Expired
- 1972-08-16 FR FR7229267A patent/FR2150121A5/fr not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2145654A (en) * | 1983-09-01 | 1985-04-03 | Heumann Ludwig & Co Gmbh | Production of granulates |
US4671914A (en) * | 1983-09-01 | 1987-06-09 | Ludwig Heumann & Co. Gmbh | Production of granulates by using a tabletting machine |
WO1990012251A1 (en) * | 1989-04-12 | 1990-10-18 | William Roland Milner | Method and apparatus for waste treatment |
Also Published As
Publication number | Publication date |
---|---|
DE2141072A1 (en) | 1973-02-22 |
DE2141072B2 (en) | 1974-04-04 |
FR2150121A5 (en) | 1973-03-30 |
DE2141072C3 (en) | 1974-10-31 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] |