WO2014082168A1 - Dispositif d'optimisation d'un procédé de moulage - Google Patents

Dispositif d'optimisation d'un procédé de moulage Download PDF

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Publication number
WO2014082168A1
WO2014082168A1 PCT/CA2013/050825 CA2013050825W WO2014082168A1 WO 2014082168 A1 WO2014082168 A1 WO 2014082168A1 CA 2013050825 W CA2013050825 W CA 2013050825W WO 2014082168 A1 WO2014082168 A1 WO 2014082168A1
Authority
WO
WIPO (PCT)
Prior art keywords
molding
mold
molded article
adjustment
images
Prior art date
Application number
PCT/CA2013/050825
Other languages
English (en)
Inventor
Francois Styga
Douglas James Weatherall
Original Assignee
Husky Injection Molding Systems Ltd.
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 Husky Injection Molding Systems Ltd. filed Critical Husky Injection Molding Systems Ltd.
Publication of WO2014082168A1 publication Critical patent/WO2014082168A1/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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/84—Safety devices
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/76—Measuring, controlling or regulating
    • B29C45/7626—Measuring, controlling or regulating the ejection or removal of moulded articles
    • 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
    • B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
    • B29C2945/76—Measuring, controlling or regulating
    • B29C2945/76344—Phase or stage of measurement
    • B29C2945/76418—Ejection
    • 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
    • B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
    • B29C2945/76—Measuring, controlling or regulating
    • B29C2945/76929—Controlling method
    • B29C2945/76936—The operating conditions are corrected in the next phase or cycle
    • 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
    • B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
    • B29C2945/76—Measuring, controlling or regulating
    • B29C2945/76929—Controlling method
    • B29C2945/76939—Using stored or historical data sets
    • B29C2945/76946—Using stored or historical data sets using an expert system, i.e. the system possesses a database in which human experience is stored, e.g. to help interfering the possible cause of a fault
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/40—Removing or ejecting moulded articles

Definitions

  • Non-Limiting embodiments disclosed herein generally relate to a device and a related method for optimizing a molding process of a molding system.
  • a device for use with optimizing a molding process in a molding system includes an imaging device that is positionable in the molding system for acquiring a sequence of images of at least one molded article being ejected from a mold of the molding system and a computer that is configured to receive the sequence of images and to perform an operation therewith.
  • a method for optimizing a molding process in a molding system includes molding at least one molded article within a mold of the molding system; opening the mold; ejecting the at least one molded article from the mold; acquiring a sequence of images of the at least one molded article during the ejection thereof using an imaging device; and performing an operation with the sequence of images.
  • FIG. 1 depicts a schematic plan view representation of a molding system according to a non-limiting embodiment
  • FIGS. 2 to 6 depict a sequence of side views of the molding system of FIG. 1 that illustrate the ejection behavior of a group of molded articles being ejected from a mold therein;
  • FIG. 7 depicts a section view representation of a portion of a mold that has been configured in accordance with a non-limiting embodiment;
  • FIG. 8 depicts a section view representation of a portion of a mold that has been configured in accordance with a further non-limiting embodiment
  • FIG. 9 depicts a section view representation of a portion of the mold that has been configured in accordance with yet another non-limiting embodiment.
  • the drawings are not necessarily to scale and may be illustrated by phantom lines, diagrammatic representations and fragmentary views. In certain instances, details that are not necessary for an understanding of the embodiments or that render other details difficult to perceive may have been omitted. DETAILED DESCRIPTION OF THE NON-LIMITING EMBODIMENT(S)
  • Ejection of molded article(s), such as, for example, closure(s) for the capping of bottle(s), from a mold (e.g. injection mold) is a large contributor to cycle time (i.e. the total time required for a molding system to complete one entire molding cycle) and cycle interruptions.
  • cycle time i.e. the total time required for a molding system to complete one entire molding cycle
  • cycle interruptions i.e. the total time required for a molding system to complete one entire molding cycle
  • cycle time i.e. the total time required for a molding system to complete one entire molding cycle
  • a device for use with a molding system having an imaging device for tracking a molded article during the ejection thereof from the mold.
  • an imaging device for tracking a molded article during the ejection thereof from the mold.
  • a high-speed camera may be incorporated into a mold clamp area in order to observe mold movements and the ejection of a group of closures.
  • the observations from the imaging device may then be correlated into formation of a 2D or 3D image of the group of closures in order that individual part trajectories may be tracked and adjustments made to a molding process to optimize the ejection thereof.
  • the results of the imaging may be reported to an operator of the molding system, such as, for example, via a display on an operator interface device of the molding system, in such a way that the operator may to track changes in the ejection of the closures.
  • the system is automated such that a computer (for instance the control structure of the molding system or a standalone device) analyzes the images during the cycle and applies a predetermined algorithm to make corrections to one or more molding parameters.
  • this algorithm could be a learning type which modifies itself based on historical data and responses.
  • the control structure of the molding system may be configured to dynamically adjust mold closing (e.g. closing speed and/or time) to allow molded articles that are relatively slow moving to drop out of the mold before the closing thereof.
  • adjustments could be made to a molding material distributor (e.g. hot runner), such as, for example, a temperature of a tip in a nozzle thereof, to affect change in the ejection behavior of the closure molded in fluid communication therewith.
  • a temperature of the components of the mold that define the mold cavity may be adjusted to again affect change in the ejection behavior of the closure molded therewith.
  • Such a change may be made, for example, by adjusting a heater that is incorporated into a mold cavity defining component to make slight modifications of the temperature effecting heat removal rates and thereby changing the ejection behavior.
  • a technical effect or benefit of the foregoing may include molding process optimization that is characterized by cycle time reduction (increased molding system output) and increased overall equipment effectiveness by reducing cycle interruptions caused by erratic ejection.
  • the molding system 100 is configured as an injection molding system that broadly includes a mold clamp 110, a mold 120, a molding material preparation device 130, a system controller 140, and a molding material distributor 170.
  • the mold 120 includes a first part 122 and a second part 124 that when closed together define a plurality of molding cavities within which molded articles, depicted as a group of molded articles (e.g. a group of closures of the type for capping bottles and the like), are moldable.
  • the first part 122 is mounted to a moving platen 114 of the mold clamp 110.
  • the second part 124 is mounted to the molding material distributor 170 which in turn is mounted on a stationary platen 116 of the mold clamp 110.
  • the first part 122 is reciprocated relative to the second part 124 for opening and closing the mold 120 through relative movement between the moving platen 114 and the stationary platen 116.
  • the molding material preparation device 130 is configured to prepare (e.g. melt) molding material (not shown) and to inject the molding material through the melt distributor 170 and into the plurality of molding cavities of the mold 120.
  • the device 180 includes an imaging device 150 (or multiple such imaging devices) and a computer 152 that is associated therewith.
  • the imaging device 150 is positionable within the molding system 100 for acquiring a sequence of images of the group closures being ejected from the mold 120 of the molding system (as may be appreciated by contrasting the sequence of views shown in FIGS. 2 to 6).
  • the imaging device 150 may be a high-speed digital camera, that is able to grab, for example, and without specific limitation, about 60 to 500 frames per second, that is positioned beside the mold clamp 110 with a clear view of a region between the first part 122 and the second part 124 of the mold 120.
  • the computer 152 may be a standalone device or otherwise implemented within the system controller 140 of the molding system 100. Furthermore, the computer 152 may be configured to cooperate with the system controller 140. The computer 152 is configured to receive the sequence of images and to perform an operation therewith.
  • the operation performed by the computer 152 may involve displaying one or more of the sequence of images on an operator interface 106 of the molding system 100. This information may be useful to the operator of the molding system 100 with which to make manual adjustments to a molding parameter thereof.
  • the operation may involve analyzing the sequence of images to evaluate an ejection trajectory of each of the group of molded articles 160 or a selected molded article 160-1 (FIG. 2) thereof the at least one molded article.
  • Such an analysis may be performed using commercially available software such as the i-speed software suite from Olympus (www.olympus- ims.com).
  • the selected molded article 160-1 may be identified from a group of molded articles 160 being ejected on the basis of having an ejection trajectory that is an outlier.
  • the selected molded article 160-1 is identified on the basis of having an ejection trajectory that is outside of a pre-determined bound 232.
  • other outliers such as molded article 160-2 may be identified.
  • the operation may further include correlating the selected molded article 160-1 to a mold cavity of the mold 120 and evaluating an adjustment to a molding parameter appropriate to alter the ejection trajectory of another molded article molded in the mold cavity in a subsequent molding cycle.
  • the adjustment may be implemented manually by the operator or the operation may further include automatically adjusting the molding parameter.
  • the molding parameter may relate to the operation of a clamp actuator 112 of the mold clamp 110 (FIG. 1) that is operable, in use, to open and close the mold 120, and wherein the adjustment to the molding parameter affects closing of the mold 120 to allow the selected molded article 160-1 to drop out thereof before the complete closing thereof.
  • the molding parameter may relate to the operation of the molding material distributor 170 (FIG. 1) and wherein the adjustment to the molding parameter affects a temperature of the molding material entering the mold 120.
  • the molding parameter more specifically relates to the control of a nozzle heater 174 that is associated with a nozzle 172 of the molding material distributor 170.
  • the molding parameter may relate to the control of an air valve 193 for selectively dispensing air in the mold 120 during ejection of the molded article 160-1.
  • the air valve 193 is configured to selectively control a flow of air from a source 191 through a passageway that is defined between an inner core 194 and an outer core 196 of the core 192.
  • the molding parameter may relate to the operation of the mold 120.
  • the molding parameter may relate to temperature control of a mold cavity defining component of the mold 120 such as, for example, a core 192 that defines an interior of the mold cavity. More particularly, the molding parameter relates to the control of a core heater 197 that is associated with the core 192 of the mold 120.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

L'invention concerne, entre autres, un dispositif et un procédé associé pour l'utilisation optimisée d'un procédé de moulage dans un système de moulage. Le dispositif comprend un dispositif d'imagerie qui peut être positionné dans le système de moulage pour l'acquisition d'une séquence d'images d'au moins un article moulé éjecté d'un moule du système de moulage et un ordinateur qui est conçu pour recevoir la séquence d'images et pour analyser la séquence d'images pour évaluer une trajectoire d'éjection d'un article moulé sélectionné.
PCT/CA2013/050825 2012-11-30 2013-10-31 Dispositif d'optimisation d'un procédé de moulage WO2014082168A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201261731647P 2012-11-30 2012-11-30
US61/731,647 2012-11-30

Publications (1)

Publication Number Publication Date
WO2014082168A1 true WO2014082168A1 (fr) 2014-06-05

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Family Applications (1)

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PCT/CA2013/050825 WO2014082168A1 (fr) 2012-11-30 2013-10-31 Dispositif d'optimisation d'un procédé de moulage

Country Status (1)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3381642A1 (fr) * 2017-03-31 2018-10-03 Sumitomo Heavy Industries, Ltd. Machine de moulage à injection
DE102015015758B4 (de) 2014-12-12 2019-10-02 Fanuc Corporation Auswerfsteuerung für eine Spritzgießmaschine
WO2022224563A1 (fr) * 2021-04-22 2022-10-27 ウシオライティング株式会社 Dispositif de suivi de moule et procédé de suivi de moule

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4236181A (en) * 1977-04-28 1980-11-25 Ituo Shibata Defect detecting device
US4833616A (en) * 1985-11-06 1989-05-23 Nifco Kasei Inc. Device for controlling operation of injection molder
US4841364A (en) * 1988-04-15 1989-06-20 Kawaguchi, Ltd. System for confirming the release of a molded article in an injection molding apparatus and for determining the quality of the article
US5928578A (en) * 1997-03-26 1999-07-27 Avalon Imaging, Inc. Skip-eject system for injection molding machines

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4236181A (en) * 1977-04-28 1980-11-25 Ituo Shibata Defect detecting device
US4833616A (en) * 1985-11-06 1989-05-23 Nifco Kasei Inc. Device for controlling operation of injection molder
US4841364A (en) * 1988-04-15 1989-06-20 Kawaguchi, Ltd. System for confirming the release of a molded article in an injection molding apparatus and for determining the quality of the article
US5928578A (en) * 1997-03-26 1999-07-27 Avalon Imaging, Inc. Skip-eject system for injection molding machines

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015015758B4 (de) 2014-12-12 2019-10-02 Fanuc Corporation Auswerfsteuerung für eine Spritzgießmaschine
EP3381642A1 (fr) * 2017-03-31 2018-10-03 Sumitomo Heavy Industries, Ltd. Machine de moulage à injection
CN108688106A (zh) * 2017-03-31 2018-10-23 住友重机械工业株式会社 注射成型机
CN108688106B (zh) * 2017-03-31 2021-01-05 住友重机械工业株式会社 注射成型机
WO2022224563A1 (fr) * 2021-04-22 2022-10-27 ウシオライティング株式会社 Dispositif de suivi de moule et procédé de suivi de moule

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