GB1495879A - Extruders for plastics - Google Patents

Extruders for plastics

Info

Publication number
GB1495879A
GB1495879A GB20373/76A GB2037376A GB1495879A GB 1495879 A GB1495879 A GB 1495879A GB 20373/76 A GB20373/76 A GB 20373/76A GB 2037376 A GB2037376 A GB 2037376A GB 1495879 A GB1495879 A GB 1495879A
Authority
GB
United Kingdom
Prior art keywords
passage
die
adaptor
mandrels
honeycomb
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
GB20373/76A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Covema Srl
Original Assignee
Covema Srl
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 by Covema Srl filed Critical Covema Srl
Priority to GB20373/76A priority Critical patent/GB1495879A/en
Publication of GB1495879A publication Critical patent/GB1495879A/en
Expired legal-status Critical Current

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
    • 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
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • B29C48/11—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels comprising two or more partially or fully enclosed cavities, e.g. honeycomb-shaped
    • 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
    • B29C48/12—Articles with an irregular circumference when viewed in cross-section, e.g. window profiles
    • 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
    • B29C48/07—Flat, e.g. panels
    • 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
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • B29C48/10—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels flexible, e.g. blown foils
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/60—Multitubular or multicompartmented articles, e.g. honeycomb

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

1495879 Die for extruding honeycomb structure COVEMA Srl 18 May 1976 20373/76 Heading B5A A plastics honeycomb structure is extruded from a shaping passage 11 defined between a die 3, and a plurality of mandrels which extend downstream from a part 9 of an adaptor 2, the die 3 and the adaptor 2 being releasably attached at bolts 4 to a die head 1, to facilitate replacement by another shaping means for the extrusion of a honeycomb of a different size and/or shape, or the extrusion of a solid section. To prevent defects to the honeycomb arising during its passage from the die through a vacuum sizing means, atmospheric pressure is admitted to the bores of the honeycomb, via an adaptor inlet passage 14, 13, an adaptor bore 12 extending through the part 9 transversely of all the mandrels, and a passage 16 extending longitudinally through each mandrel 9 to its downstream end. The plastics material is delivered to the extrusion passage 11 from a die head passage 7, via a passage 17 extending transversely across the adaptor and divergent passages 6 connecting along a continuous passage 8 extending on the adaptor downstream face around the mandrels, and interconnected passages 10 defined between adjacent mandrels 9 and between the mandrels and the surrounding die 3.
GB20373/76A 1976-05-18 1976-05-18 Extruders for plastics Expired GB1495879A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB20373/76A GB1495879A (en) 1976-05-18 1976-05-18 Extruders for plastics

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB20373/76A GB1495879A (en) 1976-05-18 1976-05-18 Extruders for plastics

Publications (1)

Publication Number Publication Date
GB1495879A true GB1495879A (en) 1977-12-21

Family

ID=10144879

Family Applications (1)

Application Number Title Priority Date Filing Date
GB20373/76A Expired GB1495879A (en) 1976-05-18 1976-05-18 Extruders for plastics

Country Status (1)

Country Link
GB (1) GB1495879A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4690628A (en) * 1984-10-18 1987-09-01 Solvay & Cie. (Societe Anonyme) Adjustable feed block for coextrusion die
US4834635A (en) * 1986-02-06 1989-05-30 Cadbury Limited Extrusion die for extruded product

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4690628A (en) * 1984-10-18 1987-09-01 Solvay & Cie. (Societe Anonyme) Adjustable feed block for coextrusion die
US4834635A (en) * 1986-02-06 1989-05-30 Cadbury Limited Extrusion die for extruded product

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee