ES450426A1 - Improvements in the appliances to extrude plastic tubes. (Machine-translation by Google Translate, not legally binding) - Google Patents

Improvements in the appliances to extrude plastic tubes. (Machine-translation by Google Translate, not legally binding)

Info

Publication number
ES450426A1
ES450426A1 ES450426A ES450426A ES450426A1 ES 450426 A1 ES450426 A1 ES 450426A1 ES 450426 A ES450426 A ES 450426A ES 450426 A ES450426 A ES 450426A ES 450426 A1 ES450426 A1 ES 450426A1
Authority
ES
Spain
Prior art keywords
towards
extrusion nozzle
annular passage
translation
channel
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
ES450426A
Other languages
Spanish (es)
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of ES450426A1 publication Critical patent/ES450426A1/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
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
    • B29C48/325—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles being adjustable, i.e. having adjustable exit sections
    • 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
    • B29C48/03—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
    • B29C48/13—Articles with a cross-section varying in the longitudinal direction, e.g. corrugated pipes
    • 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
    • B29C48/252—Drive or actuation means; Transmission means; Screw supporting means
    • B29C48/2528—Drive or actuation means for non-plasticising purposes, e.g. dosing unit

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Spray Control Apparatus (AREA)
  • Nozzles (AREA)

Abstract

Improvements in the apparatuses for extruding plastic tubes, to be used in the manufacture of plastic bottles, of the type comprising an extrusion nozzle having an internal channel of progressively decreasing or increasing diameter, in correspondence with an extreme portion, towards the outside, a mandrel axially disposed in said channel and having a head portion disposed within said end portion of the channel with which an annular passage is defined, said portion of diameter progressively decreasing or growing towards the outside, means for feeding material plastic to be extruded towards said annular passage, said extrusion nozzle and said mandrel being movable axially with respect to each other to vary the amplitude of said annular passage and means being provided for regulating said reciprocal axial movement, characterized in that said extrusion nozzle (29) is axially movable under the control of a piston double effect (10) operatively connected to a copying valve (41), a movable cam profile (46) and means (44, 45) for moving said cam profile, said copying valve continuously being driven by said profile cam to move said piston and thus said extrusion nozzle towards one or the other axial position to vary the amplitude of said annular passage and consequently the thickness of the plastic tube extruded through said passage. (Machine-translation by Google Translate, not legally binding)
ES450426A 1975-07-22 1976-07-22 Improvements in the appliances to extrude plastic tubes. (Machine-translation by Google Translate, not legally binding) Expired ES450426A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT25636/75A IT1040055B (en) 1975-07-22 1975-07-22 EQUIPMENT FOR EXTRUDING PLASTIC PIPES PARTICULARLY FOR THE MANUFACTURING OF PLASTIC BOTTLES

Publications (1)

Publication Number Publication Date
ES450426A1 true ES450426A1 (en) 1977-09-01

Family

ID=11217320

Family Applications (1)

Application Number Title Priority Date Filing Date
ES450426A Expired ES450426A1 (en) 1975-07-22 1976-07-22 Improvements in the appliances to extrude plastic tubes. (Machine-translation by Google Translate, not legally binding)

Country Status (4)

Country Link
DE (1) DE2631311A1 (en)
ES (1) ES450426A1 (en)
FR (1) FR2318723A1 (en)
IT (1) IT1040055B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2620535B2 (en) * 1995-02-24 1997-06-18 株式会社タハラ Parison controller for blow molding machine

Also Published As

Publication number Publication date
DE2631311A1 (en) 1977-03-03
FR2318723A1 (en) 1977-02-18
IT1040055B (en) 1979-12-20

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