FR2341421A1 - Thermoplastics tubular film prodn. - with pre-expansion in die and internal air cooling before cooling mandrel - Google Patents

Thermoplastics tubular film prodn. - with pre-expansion in die and internal air cooling before cooling mandrel

Info

Publication number
FR2341421A1
FR2341421A1 FR7604978A FR7604978A FR2341421A1 FR 2341421 A1 FR2341421 A1 FR 2341421A1 FR 7604978 A FR7604978 A FR 7604978A FR 7604978 A FR7604978 A FR 7604978A FR 2341421 A1 FR2341421 A1 FR 2341421A1
Authority
FR
France
Prior art keywords
mandrel
cooling
prodn
tubular film
die
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.)
Granted
Application number
FR7604978A
Other languages
French (fr)
Other versions
FR2341421B1 (en
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.)
ExxonMobil Technology and Engineering Co
Original Assignee
Exxon Research and Engineering Co
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 Exxon Research and Engineering Co filed Critical Exxon Research and Engineering Co
Priority to FR7604978A priority Critical patent/FR2341421A1/en
Publication of FR2341421A1 publication Critical patent/FR2341421A1/en
Application granted granted Critical
Publication of FR2341421B1 publication Critical patent/FR2341421B1/fr
Granted 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
    • B29C48/902—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 internally
    • 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
    • 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
    • B29C48/919—Thermal treatment of the stream of extruded material, e.g. cooling using a bath, e.g. extruding into an open bath to coagulate or cool the material
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92009—Measured parameter
    • B29C2948/92114—Dimensions
    • B29C2948/92133—Width or height
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/92514—Pressure
    • 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
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0018—Combinations of extrusion moulding with other shaping operations combined with shaping by orienting, stretching or shrinking, e.g. film blowing
    • 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
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0019—Combinations of extrusion moulding with other shaping operations combined with shaping by flattening, folding or bending

Landscapes

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

Abstract

Prodn. of tubular film involves extruding molten thermoplastics (I), cooling with a directional gas stream so that it (partly) sets and passing downwards over a cooling mandrel. (I) is pre-expanded in the die before extrusion and the press. inside the tube is kept constant at 0.254-2.54 cm water column. Cooling is carried out continuously with a high speed air stream (II), from a slit in the cooling mandrel, the slit being at an angle of 25-35 degrees to the horizontal, in an amt. of 2.83-7.08 Nm3/min. (II) cools the inside of the tube and provides an air cushion between this and the mandrel, preventing sticking. High quality film can be produced in relatively high amts. (ca 181 kg/h of 178 cm wide lay-flat tube). Higher rates of prodn. (227-245 kg/h) are possible with plastics which are difficult to process (e.g. polypropylene).
FR7604978A 1976-02-23 1976-02-23 Thermoplastics tubular film prodn. - with pre-expansion in die and internal air cooling before cooling mandrel Granted FR2341421A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7604978A FR2341421A1 (en) 1976-02-23 1976-02-23 Thermoplastics tubular film prodn. - with pre-expansion in die and internal air cooling before cooling mandrel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7604978A FR2341421A1 (en) 1976-02-23 1976-02-23 Thermoplastics tubular film prodn. - with pre-expansion in die and internal air cooling before cooling mandrel

Publications (2)

Publication Number Publication Date
FR2341421A1 true FR2341421A1 (en) 1977-09-16
FR2341421B1 FR2341421B1 (en) 1980-04-30

Family

ID=9169476

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7604978A Granted FR2341421A1 (en) 1976-02-23 1976-02-23 Thermoplastics tubular film prodn. - with pre-expansion in die and internal air cooling before cooling mandrel

Country Status (1)

Country Link
FR (1) FR2341421A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114801055A (en) * 2022-03-15 2022-07-29 祥星塑料模具(嘉兴)有限公司 Plastic shell injection molding process

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1226472A (en) * 1958-08-27 1960-07-13 Pont Company Of Canada 1956 Lt Improvements in the production of seamless plastic tubes
US3108324A (en) * 1960-11-10 1963-10-29 Phillips Petroleum Co Method and means for manufacture of biaxially oriented thermoplastic film
FR1490299A (en) * 1966-08-25 1967-07-28 Continental Can Co Cooling cap for continuously extruded plastic tubes
FR1600011A (en) * 1968-03-04 1970-07-20
US3591895A (en) * 1969-04-11 1971-07-13 Owens Illinois Inc Precision control of plastic sheet manufacture

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1226472A (en) * 1958-08-27 1960-07-13 Pont Company Of Canada 1956 Lt Improvements in the production of seamless plastic tubes
US3108324A (en) * 1960-11-10 1963-10-29 Phillips Petroleum Co Method and means for manufacture of biaxially oriented thermoplastic film
FR1490299A (en) * 1966-08-25 1967-07-28 Continental Can Co Cooling cap for continuously extruded plastic tubes
FR1600011A (en) * 1968-03-04 1970-07-20
US3591895A (en) * 1969-04-11 1971-07-13 Owens Illinois Inc Precision control of plastic sheet manufacture

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114801055A (en) * 2022-03-15 2022-07-29 祥星塑料模具(嘉兴)有限公司 Plastic shell injection molding process

Also Published As

Publication number Publication date
FR2341421B1 (en) 1980-04-30

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Legal Events

Date Code Title Description
ST Notification of lapse