WO1991007271A1 - Systeme de commande pour un dispositif de moulage de plastique par injection-soufflage - Google Patents

Systeme de commande pour un dispositif de moulage de plastique par injection-soufflage Download PDF

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Publication number
WO1991007271A1
WO1991007271A1 PCT/EP1990/001860 EP9001860W WO9107271A1 WO 1991007271 A1 WO1991007271 A1 WO 1991007271A1 EP 9001860 W EP9001860 W EP 9001860W WO 9107271 A1 WO9107271 A1 WO 9107271A1
Authority
WO
WIPO (PCT)
Prior art keywords
pressure
transmitter
blow
receiver
holloware
Prior art date
Application number
PCT/EP1990/001860
Other languages
German (de)
English (en)
Inventor
Wolfgang FÖRSTER
Original Assignee
Foerster Wolfgang
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 Foerster Wolfgang filed Critical Foerster Wolfgang
Publication of WO1991007271A1 publication Critical patent/WO1991007271A1/fr

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
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/78—Measuring, controlling or regulating
    • B29C49/80—Testing, e.g. for leaks

Definitions

  • the control device according to the invention is intended to provide a simple means of achieving a better quality of the hollow plastic body produced, without this requiring a large outlay on equipment.
  • a pressure measuring device attached to and connected to the blower core, a transmitter connected and interacting with the pressure measuring device and a receiver spatially arranged separately from the blower core, which transmit the measured pressure from the transmitter receives corresponding signals, evaluates and operates a transport switch for the hollow bodies produced depending on the determined pressure value.
  • the pressure in the manufacture of hollow bodies made of plastic is continuously measured and the measured value is transmitted wirelessly from the rotating part-sender- to a stationary part-receiver.
  • the signal for the early completion of the stretching process is included.
  • the received signals are sent to the evaluation electronics by cable.
  • the pressure signal is shown as a numerical value per blowing station and as a bar chart for several stations.
  • the pressure values sent are assigned to the station number.
  • the target pressure values and station numbers are adjustable.
  • the voltage coming from the pressure transducer is converted into an 8-bit word by the analog-digital converter and then into a serial signal by the parallel-serial converter, this signal is amplified and fed to the infrared transmitter diode.
  • the transmitted signal does not only consist of the pressure value, but also a total of five data words:
  • the transmitter is able to continuously transmit the five data words, but because of energy savings and Data transmission security, data transmission is triggered only by a signal from the evaluation electronics.
  • This start signal is an IR pulse from the receiver electronics to the transmitter. Data transmission is only triggered when this pulse is received by the transmitter.
  • a receiver can be positioned anywhere outside the wheel and the pressure curve, which characterizes the blowing process and influences the quality, can be recorded.
  • the distance between transmitter and receiver is 150-300mm.
  • the sequential number of the blowing station is set on two BCD switches (inside the transmitter).
  • the transmitter electronics and the pressure sensor are housed in a metal housing.
  • the receiver consists of: A plastic housing, a circuit board with an IR transmitter (for transmission start signal) and an IR receiver and a multi-pin socket for the connection cable to the evaluation electronics.
  • the receiver is placed outside the moving part at the same height as the transmitter.
  • the position of the receiver is just before the cut-off point of the blowing air.
  • the evaluation electronics are located outside the blow molding machine and are connected to the receiver via a flexible, multi-pole cable.
  • the device works with a microprocessor, which converts the signals coming from the receiver, compares them with specified target values and displays them on a graphic display.
  • the limit values can be set numerically on the inside of the housing using BCD switches, division 0. 5 bar.
  • Undershoots of limit values can be signaled acoustically or optically by connecting alarm transmitters to potential-free contacts. Prevents z. B. a defect the
  • Recharging the battery this can also be signaled by an external warning signal generator.
  • the values from several stations are displayed individually.
  • the display also serves to align the transmitter and receiver. All pressure values, provided with a station number, can be displayed. These values are kept until the next round.
  • 10 and 11 show the two parts of a two-part blow mold, which is usually located on a carousel or the like.
  • a hollow body which is supplied with pressure medium by means of a blow core 12 via a feed line 13, as can be seen from the arrow indicated above.
  • the pressure introduced into the blow mold is controlled, but not measured, especially not after the hollow body has assumed its final shape and can be removed from the blow mold after a more or less long cooling time. Due to the pressure immediately after the complete expansion of the hollow body, a reliable statement can be made as to whether the hollow body has the appropriate shape and also the desired quality and tightness.
  • a valve part 14 is provided in the pressure medium supply line, which shuts off the pressure medium supplied after the blowing process and opens an opening to a measuring device, which is also located in the part designated by 14.
  • the determined pressure value 14 is forwarded to a transmitter 15.
  • the pressure value transmitted by the transmitter 15 arrives at the receiver 16, which carries out the corresponding evaluation and actuates a switch 17 so that perfect hollow bodies, which arrive from the blow mold 10, 11 in the direction of the arrow 18, are continued on the path of the arrow 19, while defective hollow bodies take another path, that of arrow 20, and are sorted out from the production process.
  • 29 bar was determined as the minimum pressure for a correct volume.
  • a 33 bar supply pressure is available on the machine.
  • the decision point for hollow bodies "good” or “bad” is 29 bar.
  • the machine system “consumes” 2 bar (theoretical value).
  • the static pressure in the hollow body only reaches 25 bar due to leakages in the system.
  • This hollow body is lower because contours are not formed, a shorter cooling time and, as a result, greater shrinkback occur.
  • These hollow bodies lying outside the standard are recognized by the measuring system and automatically ejected before the hollow body enters the further production process.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

L'invention se rapporte à un système de commande pour un dispositif de moulage de plastique par injection-soufflage pour la fabrication de pièces creuses en plastique, particulièrement des bouteilles, où des pièces creuses sont fabriquées à partir de pré-moulages au-moyen d'un élément de pression, d'un noyau soufflé et d'un moule de soufflage et sont amenées à un stade ultérieur du processus de fabrication. De plus, sont prévus un instrument de mesure de pression (14) situé près du noyau de soufflage (12) et relié à celui-ci, un émetteur (15) relié à l'instrument de mesure de pression (14) et fonctionnant conjointement avec lui, et un récepteur (16) séparé spatialement du noyau de soufflage, qui reçoit les signaux provenant de l'émetteur (15) et correspondant à la pression mesurée, les évalue et actionne un dispositif de transport séparateur (17) pour les pièces creuses fabriquées, selon la valeur de pression déterminée.
PCT/EP1990/001860 1989-11-11 1990-11-07 Systeme de commande pour un dispositif de moulage de plastique par injection-soufflage WO1991007271A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8913346U DE8913346U1 (de) 1989-11-11 1989-11-11 Steuervorrichtung an einer Kunststoffspritzblaseinrichtung
DEG8913346.3U 1989-11-11

Publications (1)

Publication Number Publication Date
WO1991007271A1 true WO1991007271A1 (fr) 1991-05-30

Family

ID=6844495

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1990/001860 WO1991007271A1 (fr) 1989-11-11 1990-11-07 Systeme de commande pour un dispositif de moulage de plastique par injection-soufflage

Country Status (4)

Country Link
EP (1) EP0453534A1 (fr)
JP (1) JPH04503638A (fr)
DE (1) DE8913346U1 (fr)
WO (1) WO1991007271A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0562202A2 (fr) * 1991-12-27 1993-09-29 Kao Corporation Appareil de moulage par soufflage
DE102011016688A1 (de) * 2011-04-11 2012-10-11 Rehau Ag + Co. Verfahren zur Detektion von Fehlstellen in Blasformteilen
CN101623925B (zh) * 2008-07-08 2014-03-12 克朗斯股份公司 用于将预制品吹塑成塑料容器并具有温度模块的设备
CN112197167A (zh) * 2020-10-09 2021-01-08 广东省特种设备检测研究院 一种车载储氢瓶气密性预警监控系统

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19933847A1 (de) * 1999-07-20 2001-01-25 Krupp Corpoplast Maschb Gmbh Verfahren und Vorrichtung zur Blasformung von Behältern
DE102004061230B4 (de) * 2004-12-16 2011-09-29 Krones Ag Blasmaschine und Blasverfahren
IT201700006070A1 (it) * 2017-01-20 2018-07-20 Verve Spa Macchina migliorata di stampaggio di contenitori per stiro-soffiaggio e metodo di verifica

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1904897A1 (de) * 1968-02-01 1969-09-25 Masaaki Uchida Kontinuierliches Verfahren zum Formen,Fuellen und Verschliessen von Flaschen aus thermoplastischem Kunststoff
JPS54159470A (en) * 1978-06-06 1979-12-17 Sumitomo Heavy Ind Ltd Detecting unit for misblowing of injection blow molding machine
JPS57128518A (en) * 1981-02-04 1982-08-10 Sumitomo Heavy Ind Ltd Detector for mis-blow in injection blow molding machine
JPS62275731A (ja) * 1986-05-26 1987-11-30 Toppan Printing Co Ltd ブロ−成形容器のピンホ−ル検出方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1904897A1 (de) * 1968-02-01 1969-09-25 Masaaki Uchida Kontinuierliches Verfahren zum Formen,Fuellen und Verschliessen von Flaschen aus thermoplastischem Kunststoff
JPS54159470A (en) * 1978-06-06 1979-12-17 Sumitomo Heavy Ind Ltd Detecting unit for misblowing of injection blow molding machine
JPS57128518A (en) * 1981-02-04 1982-08-10 Sumitomo Heavy Ind Ltd Detector for mis-blow in injection blow molding machine
JPS62275731A (ja) * 1986-05-26 1987-11-30 Toppan Printing Co Ltd ブロ−成形容器のピンホ−ル検出方法

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
Patent Abstracts of Japan, Band 12, Nr 157 (M-696)(3004), 13. Mai 1988; & JP-A-62275731 (TOPPAN PRINTING CO., LTD) 30. November 1987 *
Patent Abstracts of Japan, Band 4, Nr. 22 (C-74), 23. February 1980; & JP-A-54159470 (SUMITOMO JUKIKAI KOGYO K.K.) 17. Dezember 1979 *
Patent Abstracts of Japan, Band 6, Nr. 224 (M-170)(1102), 9 November 1982; & JP-A-57128518 (SUMITOMO JUKIKAI KOGYO K.K.) 10. August 1982 *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0562202A2 (fr) * 1991-12-27 1993-09-29 Kao Corporation Appareil de moulage par soufflage
EP0562202A3 (fr) * 1991-12-27 1994-02-09 Kao Corp
US5399302A (en) * 1991-12-27 1995-03-21 Kao Corpoation Parison length control method for blow molding machine
CN101623925B (zh) * 2008-07-08 2014-03-12 克朗斯股份公司 用于将预制品吹塑成塑料容器并具有温度模块的设备
DE102011016688A1 (de) * 2011-04-11 2012-10-11 Rehau Ag + Co. Verfahren zur Detektion von Fehlstellen in Blasformteilen
DE102011016688B4 (de) * 2011-04-11 2015-03-19 Rehau Ag + Co. Verfahren zur Detektion von Fehlstellen in Blasformteilen
CN112197167A (zh) * 2020-10-09 2021-01-08 广东省特种设备检测研究院 一种车载储氢瓶气密性预警监控系统

Also Published As

Publication number Publication date
DE8913346U1 (de) 1990-03-29
EP0453534A1 (fr) 1991-10-30
JPH04503638A (ja) 1992-07-02

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