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
Application number
GB3069372A
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Publication of GB1375883A publication Critical patent/GB1375883A/en
Expired legal-status Critical Current

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.
GB3069372A 1971-08-17 1972-06-30 Expired GB1375883A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Cited By (3)

* Cited by examiner, † Cited by third party
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
FR2150121A5 (en) 1973-03-30
DE2141072C3 (en) 1974-10-31
DE2141072A1 (en) 1973-02-22
DE2141072B2 (en) 1974-04-04

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]