GB1500944A - Vacuum calibrating device for tubular extrudates of yieldable thermoplastic materials - Google Patents

Vacuum calibrating device for tubular extrudates of yieldable thermoplastic materials

Info

Publication number
GB1500944A
GB1500944A GB11890/75A GB1189075A GB1500944A GB 1500944 A GB1500944 A GB 1500944A GB 11890/75 A GB11890/75 A GB 11890/75A GB 1189075 A GB1189075 A GB 1189075A GB 1500944 A GB1500944 A GB 1500944A
Authority
GB
United Kingdom
Prior art keywords
extrudate
inlet
passage
sizing
reduction
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
GB11890/75A
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.)
Milani Resine SpA
Original Assignee
Milani Resine SpA
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 Milani Resine SpA filed Critical Milani Resine SpA
Publication of GB1500944A publication Critical patent/GB1500944A/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
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
    • B29C48/901—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article of hollow bodies
    • B29C48/903—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article of hollow bodies externally
    • 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
    • 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
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
    • B29C48/904—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article using dry calibration, i.e. no quenching tank, e.g. with water spray for cooling or lubrication
    • 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
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/911—Cooling
    • B29C48/9115—Cooling of hollow articles
    • B29C48/912—Cooling of hollow articles of tubular films
    • B29C48/913—Cooling of hollow articles of tubular films externally
    • 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
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/911—Cooling
    • B29C48/9135—Cooling of flat articles, e.g. using specially adapted supporting means

Landscapes

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

Abstract

1500944 Sizing tubular extrudates MILANI RESINE SpA 21 March 1975 [22 March 1974] 11890/75 Heading B5A A tubular extrudate 3 is cooled in passing through a horizontal sizing die passage 2 against which it is urged and sized by vacuum applied through perforations 15, and the admission of air between the extrudate 3 and the passage 2 which would arise from sagging of the extrudate, is reduced by a template means 17 at the inlet to the passage 2 which, at least at the upper part of the inlet, reduces the size of the inlet and effects contact with the extrudate, the extent of vertical reduction of the inlet being greater at the upper part than any reduction at the lower part of the inlet. In the Fig. 1 embodiment, cooling is effected by water circulating through chambers 5, 7, and the extrudate 3 and sizing passage are circular, and the template means 17 comprises a ring which is eccentrically bolted to the die to effect the greater reduction at the upper part, and which has a radiused edge 18 contacting the extrudate 3. In the Fig. 4 embodiment, the extrudate and sizing die passage are rectangular, and the template means comprises upper and lower adjustably mounted plates 20, 21, the upper plate 20 being convexly curved to the upper side of the extrudate across its width and the lower plate 21 defining a straight edge.
GB11890/75A 1974-03-22 1975-03-21 Vacuum calibrating device for tubular extrudates of yieldable thermoplastic materials Expired GB1500944A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT49556/74A IT1003848B (en) 1974-03-22 1974-03-22 VACUUM CALIBRATOR FOR EXTRUDED HOLLOW BODIES OF CEDABLE THERMOPLASTIC MATERIALS

Publications (1)

Publication Number Publication Date
GB1500944A true GB1500944A (en) 1978-02-15

Family

ID=11271014

Family Applications (1)

Application Number Title Priority Date Filing Date
GB11890/75A Expired GB1500944A (en) 1974-03-22 1975-03-21 Vacuum calibrating device for tubular extrudates of yieldable thermoplastic materials

Country Status (5)

Country Link
BE (1) BE827028A (en)
DE (1) DE2511377A1 (en)
FR (1) FR2264647B3 (en)
GB (1) GB1500944A (en)
IT (1) IT1003848B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2225406A (en) * 1988-09-13 1990-05-30 North West Water Authority Methods and apparatus for use in pipe lining.

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0612604B1 (en) * 1993-02-24 1999-04-28 Ernst Dr. Krüger Device and process for manufacturing profiles

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2225406A (en) * 1988-09-13 1990-05-30 North West Water Authority Methods and apparatus for use in pipe lining.
GB2225406B (en) * 1988-09-13 1993-05-19 North West Water Authority Methods and apparatus for use in pipe lining

Also Published As

Publication number Publication date
DE2511377A1 (en) 1975-09-25
FR2264647B3 (en) 1977-11-25
BE827028A (en) 1975-07-16
FR2264647A1 (en) 1975-10-17
IT1003848B (en) 1976-06-10

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee