JPS5672934A - Method and device for controlling thickness of plastic article by blow molding - Google Patents

Method and device for controlling thickness of plastic article by blow molding

Info

Publication number
JPS5672934A
JPS5672934A JP14845779A JP14845779A JPS5672934A JP S5672934 A JPS5672934 A JP S5672934A JP 14845779 A JP14845779 A JP 14845779A JP 14845779 A JP14845779 A JP 14845779A JP S5672934 A JPS5672934 A JP S5672934A
Authority
JP
Japan
Prior art keywords
value
thickness
width
outputted
tai
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.)
Pending
Application number
JP14845779A
Other languages
Japanese (ja)
Inventor
Hisahiko Fukase
Hideo Shibata
Hisamori Tofuji
Kotaro Kawabata
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.)
IHI Corp
Original Assignee
IHI Corp
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 IHI Corp filed Critical IHI Corp
Priority to JP14845779A priority Critical patent/JPS5672934A/en
Publication of JPS5672934A publication Critical patent/JPS5672934A/en
Pending 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
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/92—Measuring, controlling or regulating
    • 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
    • B29C2948/92152—Thickness
    • 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
    • B29C2948/92323—Location or phase of measurement
    • B29C2948/92428—Calibration, after-treatment, or cooling zone
    • 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
    • B29C2948/92609—Dimensions
    • B29C2948/92647—Thickness
    • 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
    • B29C2948/92819—Location or phase of control
    • B29C2948/92857—Extrusion unit
    • B29C2948/92904—Die; Nozzle zone

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)

Abstract

PURPOSE:To prepare automatically a pattern for controlling the width of a nozzle slit by finding the width of the nozzle slit in the following time proportionally from the difference and ratio between the result of measurement and the aimed value of thickness memorized beforehand. CONSTITUTION:The actual value of the thickness Tai of the position of a mark 12 given by a marker 13 is outputted from a thickness-measuring instrument 14 to a function setter 19, the location of the position of the value of the scale division of a tape 25 is outputted from a detector 9 to a function setter 19, and the aimed value of thickness Tsi of the part corresponding to the value of the scale division is outputted from a function setter 17 to the function setter 18. In the function setter 18, based on the aimed value Tsi and the actual value Tai which are inputted, the width of the nozzle slit assumed in the previous time of injection according to a formula of Si=[1+K(Tsi/Tai-1)] Si' is set as a new width of the nozzle alit Si, which is sent to the function generator 19. In this formula, K is a constant for modification which is determined separately.
JP14845779A 1979-11-16 1979-11-16 Method and device for controlling thickness of plastic article by blow molding Pending JPS5672934A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14845779A JPS5672934A (en) 1979-11-16 1979-11-16 Method and device for controlling thickness of plastic article by blow molding

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14845779A JPS5672934A (en) 1979-11-16 1979-11-16 Method and device for controlling thickness of plastic article by blow molding

Publications (1)

Publication Number Publication Date
JPS5672934A true JPS5672934A (en) 1981-06-17

Family

ID=15453184

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14845779A Pending JPS5672934A (en) 1979-11-16 1979-11-16 Method and device for controlling thickness of plastic article by blow molding

Country Status (1)

Country Link
JP (1) JPS5672934A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59110613U (en) * 1983-01-12 1984-07-26 株式会社日本製鋼所 Parison marking control device
JPS6230020A (en) * 1985-08-01 1987-02-09 Ishikawajima Harima Heavy Ind Co Ltd Plastic blow molding process
JPH0298611A (en) * 1988-10-06 1990-04-11 Dainippon Printing Co Ltd Wall thickness inspecting device for container made of synthetic resin
CN113492087A (en) * 2020-03-19 2021-10-12 日东电工株式会社 Extrusion process

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5313667A (en) * 1976-07-23 1978-02-07 Yoshino Kogyosho Co Ltd Method of controlling parison thickness and circuit for generating thickness control signal for executing same

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5313667A (en) * 1976-07-23 1978-02-07 Yoshino Kogyosho Co Ltd Method of controlling parison thickness and circuit for generating thickness control signal for executing same

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59110613U (en) * 1983-01-12 1984-07-26 株式会社日本製鋼所 Parison marking control device
JPS6230020A (en) * 1985-08-01 1987-02-09 Ishikawajima Harima Heavy Ind Co Ltd Plastic blow molding process
DE3619113A1 (en) * 1985-08-01 1987-02-12 Ishikawajima Harima Heavy Ind PLASTIC BLOW MOLDING
JPH035294B2 (en) * 1985-08-01 1991-01-25 Ishikawajima Harima Heavy Ind
JPH0298611A (en) * 1988-10-06 1990-04-11 Dainippon Printing Co Ltd Wall thickness inspecting device for container made of synthetic resin
CN113492087A (en) * 2020-03-19 2021-10-12 日东电工株式会社 Extrusion process

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