WO2010100023A1 - Procédé et dispositif permettant d'écarter des échantillons de réserve - Google Patents

Procédé et dispositif permettant d'écarter des échantillons de réserve Download PDF

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Publication number
WO2010100023A1
WO2010100023A1 PCT/EP2010/051910 EP2010051910W WO2010100023A1 WO 2010100023 A1 WO2010100023 A1 WO 2010100023A1 EP 2010051910 W EP2010051910 W EP 2010051910W WO 2010100023 A1 WO2010100023 A1 WO 2010100023A1
Authority
WO
WIPO (PCT)
Prior art keywords
flow
data processing
processing unit
molded parts
cavity
Prior art date
Application number
PCT/EP2010/051910
Other languages
German (de)
English (en)
Inventor
Gerd Fuhrmann
Original Assignee
Intravis Gmbh
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 Intravis Gmbh filed Critical Intravis Gmbh
Publication of WO2010100023A1 publication Critical patent/WO2010100023A1/fr

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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
    • B29C45/76—Measuring, controlling or regulating
    • B29C45/7686—Measuring, controlling or regulating the ejected articles, e.g. weight control
    • 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
    • B29C2945/76177—Location of measurement
    • B29C2945/76314—Auxiliary devices
    • B29C2945/76321—Auxiliary devices conveyors
    • 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
    • B29C2945/76451—Measurement means
    • B29C2945/76461—Optical, e.g. laser
    • B29C2945/76464—Optical, e.g. laser cameras
    • 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
    • B29C45/1769—Handling of moulded articles or runners, e.g. sorting, stacking, grinding of runners

Definitions

  • the invention relates to a method and a device for separating out restoring patterns from a manufacturing process of matching moldings with the aid of a plurality of cavities arranged in at least one permanent mold, each of which is assigned an individual cavity identification, which is transferred to the surface of each mold during casting, wherein the manufactured Moldings are removed in at least one flow.
  • a typical manufacturing process of matching moldings by means of several arranged in at least one permanent cavity forms the injection molding. It is mainly used in plastics processing. With such manufacturing processes, it is possible to economically produce molded parts in large numbers.
  • the material usually plastic
  • a tool In a tool, there are usually several cavities.
  • manufacturing processes in which several permanent molds, each containing a cavity, simultaneously or in immediate time sequence produced several matching moldings and then transported by a conveyor in a flow.
  • the molded parts produced at the same time or in the immediate temporal sequence of several cavities are also referred to as shot during injection molding.
  • Defects in the moldings are often caused by individual cavities of the tool, for example, problems in the gate area.
  • problems in the gate area In order to be able to detect such problems promptly, it is necessary to remove restoring patterns from the current production of the molded parts. In order to completely monitor the quality of the molded parts produced, it is preferable to remove restoring patterns from all the cavities.
  • devices for discharging a molded part from each of the cavities are installed directly between the production machine and the conveyor for the removal of the molded parts produced. If several injection molding machines are operated, such a device must be arranged immediately behind each production machine.
  • the devices have, for example, a flap in a short transfer chute of the
  • Injection molding machine for conveyor which is manually operated to eliminate a shot of an injection molding machine.
  • the discharged sample samples are collected in a container and examined for errors in the manufacturing process using methods known per se.
  • the invention is based on the object to propose a method that allows a targeted rejection of restoring patterns and without changes to existing manufacturing machines, especially injection molding machines, are required.
  • a device for carrying out the method is to be created.
  • the solution to this task is based on the idea of separating the restitution patterns away from the problem Making machine, in particular the injection molding machine to make in the flow of the moldings.
  • the object is achieved in a method of the type mentioned above in that in the flow of the moldings at least temporarily Kavticianenkennache on the
  • Forms comprehensive images can be made using at least one digital camera, the images are processed in a data processing unit, wherein a control unit connected to the data processing unit depending on the image contained in the image
  • Cavity detection means for rejecting the molded part shown in the image are activated as a return pattern from the flow.
  • the invention uses the individual cavity identification transmitted on the surface of each molded part during casting, in particular an individual associated with each cavity
  • the cavity identifications on the molded parts comprehensive pictures are at least temporarily made with the help of a digital camera, the images can be made in the continuous flow molding or at intermittent flow with a stationary mold part.
  • the image signals recorded by each digital camera are evaluated in the data processing unit.
  • a control unit connected to the data processing unit activates the means for rejecting the molded part shown in the image as a return pattern from the delivery flow as a function of the cavity detection contained in the respective image.
  • the data processing unit preferably cooperates with the control unit such that the control unit At least one molded part with each individual Kavticianenkennung is selected as a restoring pattern from the flow. This ensures that problems in all cavities can be detected promptly by the restoring patterns separated out in a time interval. However, depending on the manufacturing process, it may also be sufficient to separate out restoring patterns from individual cavities, that is to say moldings having selected cavity identifications.
  • the corresponding program for rejection is stored in the data processing unit and processed.
  • Data processing unit predetermined cavity identifiers is compiled.
  • moldings are often discharged from the flow and fed to a quality assurance system that inspects using digital cameras surfaces of the molding to determine errors in the label or the material.
  • a quality assurance system that inspects using digital cameras surfaces of the molding to determine errors in the label or the material.
  • a second Branch flow diverted to the quality assurance system.
  • the inventive method can be implemented particularly advantageous in that the already existing digital cameras at least temporarily customize the cavity identities on the molded parts, which are processed in the data processing unit of the quality assurance system, with the
  • Data processing unit connected control unit activates the means for rejecting the restoring pattern.
  • the gripper can eject the molded part by opening the gripper and thus separate it from the second delivery flow.
  • restoring patterns from the production processes of different production machines can be discarded if the delivery streams of the cavities arranged remotely are first combined and the production of the images with the help of at least one digital camera and the rejection of the moldings as a restoring pattern in the merged Flow rate. It is of crucial importance that all cavities are assigned individual cavity identifications. Therefore, a cavity of a first production machine may not have an identifier matching a cavity of a second production machine, since otherwise there will be no clear assignment of the Set of return patterns to one of the injection molding machines is possible.
  • the conveyor is preferably designed as a continuous conveyor.
  • the pictures are made of the continuously moving moldings.
  • the apparatus for carrying out the method may also comprise a conveyor with an intermittently operating drive which is stopped for the production of the image.
  • the conveyor for example, a pocket conveyor whose pockets each receive a molded part should, however, be such that slipping of the molded part on the conveyor is reliably prevented when stopping or accelerating the conveyor.
  • FIG. 1 shows a schematic representation of an apparatus for carrying out the method according to the invention
  • FIG. 2 shows a permanent mold with six cavities
  • FIG. 3 a schematic representation of the integration of the method according to the invention into a quality assurance system
  • Figure 4 is an illustration of a
  • FIG. 5 detailed representations of various stations of the quality assurance system according to FIG. 4 for carrying out the method according to the invention as well as FIG. 5
  • FIG. 6 shows an enlarged partial representation of a quality assurance system according to FIG. 4.
  • An unillustrated conveyor promotes molded parts (1), for example, preforms for the production of beverage bottles or beverage bottles, in a first flow (2) whose conveying direction is symbolized by the arrows, from an injection molding machine, not shown, with a six cavities (3) permanent ( 4) from the injection molding machine to a further processing process or a collection container.
  • Each cavity (3) of the permanent mold (4) is associated with a cavity detection (A-F), which is transferred to the casting of each mold part (1) on its surface, as can be seen in Figure 1.
  • the specially designed as a continuous conveyor conveyor for the moldings (1) is arranged in the emission of a light source (5).
  • At least one digital camera (7) aligned with its lens (6) on one of the molded parts (1) is connected to a data processing unit (8) for processing the electronic image signals recorded by it.
  • a device (9) for the separation of individual moldings (1) which comprises, for example, a gripper or ejector, with the aid of which individual moldings are rejected as restoring patterns (10).
  • the return pattern (10), which is rejected by the device (9) in FIG. 1, has the cavity identifier B.
  • Molded parts (1) produced, on the surface of each an individual Kavticianenkennung (A-F)) is located.
  • the moldings (1) are pressed by an ejector from the permanent mold (4) of the injection molding machine and fall on a conveyor, such as a conveyor belt, go through a setup station, in which the moldings (1) in the form of beverage bottles, placed, and are in any order in the continuous flow (2) transported away from the injection molding machine.
  • the cavity identifications (A-F) on the molded parts (1) comprising images are produced at regular time intervals of about 5 minutes using the digital camera (7), which are then processed in the data processing unit (8). It will continue to produce images until a set of return patterns is discarded.
  • the control unit (11) which communicates with the data processing unit (8) activates the device (9) for the function of the cavity detection contained in the image
  • the means for rejecting the molded part shown in the image are activated with a time offset to the production of the image, must be by an object tracking in the Flow arranged behind one another moldings be ensured that the means for rejection time-shifted actually discard the molded part shown in the image.
  • the speed of the flow eg of the conveyor belt
  • the position of the molded part is stored in the image recording relative to the conveyor belt.
  • the position of the device (9) for the separation eg an ejector, is known. It can therefore be determined when the molding is located immediately in front of the ejector.
  • FIG. 3 shows an alternative possibility for implementing the method according to the invention in a production process of matching molded parts.
  • Injection molding machine produces with a cycle time of seven seconds each 96 moldings, which corresponds to a production capacity and a first flow rate (13) of about 50,000 molded parts / h.
  • a per se known unit for discharging (14) is from the first
  • Flow (13) a second flow (15) branched off, which has about 1,200 molded parts / h. This second flow (15) is fed to a quality assurance system (16). The remaining parts of the first flow (13) are fed from the conveyor, not shown, a storage container (17).
  • the unit (14) may divert moldings from the first flow (13) every five minutes during the continuous operation of the production machine 96 and feed them to the quality assurance system (16).
  • the unit (14) may branch off a molding every three seconds.
  • the images of cavities (AF) of the branched moldings (1) are continuously recorded by means of a digital camera (7) of the
  • Quality assurance system (16) are processed, which are processed in the data processing unit of the quality assurance system, wherein the means for rejecting the return pattern (10) are activated by a control unit connected to the data processing unit depending on the cavity identifier contained in the image (A-F).
  • the means for rejecting the return pattern (10) are activated by a control unit connected to the data processing unit depending on the cavity identifier contained in the image (A-F).
  • FIGS 4, 5 and 6 show an embodiment of a quality assurance system (16) for implementing the method described above:
  • the second flow (15) with molded parts (1) passes via a feeding device, not shown, on an inclined guide rail (18) of the quality assurance system (16).
  • the molded parts (1) accumulate in front of a pocket wheel (19) rotating about an axis. As soon as the pocket wheel (19) rotates, slides in the direction of the flow (15) front
  • Molded part (1) in one of the empty, evenly over the circumference of the pocket wheel (19) distributed pockets (21).
  • the pocket wheel (19) is further rotated about the axis by means of a rotary drive from pocket (21) to pocket (21), so that, for example, every three seconds a molded part (1) is received by the pocket wheel (19).
  • the moldings (1) are stable in the pockets (21) of the pocket wheel (19).
  • the pocket wheel (19) is rotated by the rotary drive counterclockwise, so that the molded parts (1) to a station (22) for taking pictures with the aid of digital camera (7) arrive.
  • the station (22) also comprises an inner hook (23), which can be lowered from above, vertically to the surface of the pocket wheel (19) in the molded part (1).
  • the inner hook (23) holds the molding (1) by means of expansion and lifts it slightly out of the pocket (21).
  • the inner gripper (23) by means of a rotary drive (24) performs at least one complete revolution.
  • the digital camera (7) takes several pictures of the neck and thread area (25) of the molded part (1) from the side, for example 36 pictures. The lighting of the molding is also done from the side.
  • the neck and thread area (25) of the molded parts (1) has the cavity identifications (A-F), so that the recorded images comprise this information.
  • the images are processed in the data processing unit (8), whereby the device (9) controlled by the data processing unit (8) rejects the reset patterns as a function of the cavity identifier (A-F) contained in the image.
  • the position of the molded part (1) in relation to the camera (7) is known to the data processing unit (8) through the detection of the cavity identifications (AF), so that the molded part, after completion of the recordings, by means of the rotary drive (24) of the inner hook (23) in a particular, the
  • Data processing unit (8) known rotational position in the pocket wheel (19) can be lowered, so that the molded part (1) for subsequent tests in the quality assurance system (16) is optimally positioned.
  • the following station (26) for examining the nature of the molded parts (1) comprises a vertically movable with respect to the surface of the pocket wheel (19) probe (27), which from a laterally on the station (26) arranged lighting (28) radiated and passing through the transparent wall of the molding (1) passing light receives.
  • This light is supplied in particular by a fiber to a spectrometer.
  • Texture of the moldings (1) would take place in all parts in a matching area.
  • the arm (32) By moving the arm (32), the molded part (1) held by the suction cup (31) is moved by the pocket (21) in the pocket wheel (19) via a discharge point (33) in the base plate (34) of the quality assurance system (16) and thrown off there. Below the discharge point (33) there is a distributor (35) which can be seen in detail in FIG.
  • the method according to the invention is integrated into an already existing quality assurance system (16), there are cost advantages. Furthermore, it is advantageous to combine the production streams of several production machines, which can also be set up far from each other. The return patterns are discarded from the combined flow, so that only one device for carrying out the method is required.
  • a significant advantage of the method according to the invention is that the separation of return patterns (10) in the delivery stream (2, 15) is possible almost anywhere, without requiring modifications to the production machine.

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 un procédé et un dispositif permettant d'écarter des échantillons de réserve d'un processus de fabrication de pièces moulées correspondantes au moyen de plusieurs cavités ménagées dans au moins un moule permanent, un code de cavité individuel associé à chacune des cavités étant transféré sur la surface de chaque pièce moulée lors du moulage. Dans le flux de transport des pièces moulées, des images comprenant le code de cavité transféré sur les pièces moulées sont produites au moins par intermittence à l'aide d'au moins un appareil photo numérique. Des moyens permettant d'écarter du flux de transport la pièce moulée sélectionnée comme échantillon de réserve et figurant sur une image sont activés en fonction du code de cavité présent sur cette image.
PCT/EP2010/051910 2009-03-05 2010-02-16 Procédé et dispositif permettant d'écarter des échantillons de réserve WO2010100023A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200910011269 DE102009011269B3 (de) 2009-03-05 2009-03-05 Verfahren und Vorrichtung zur Aussonderung von Rückstellmustern
DE102009011269.3 2009-03-05

Publications (1)

Publication Number Publication Date
WO2010100023A1 true WO2010100023A1 (fr) 2010-09-10

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Application Number Title Priority Date Filing Date
PCT/EP2010/051910 WO2010100023A1 (fr) 2009-03-05 2010-02-16 Procédé et dispositif permettant d'écarter des échantillons de réserve

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DE (1) DE102009011269B3 (fr)
WO (1) WO2010100023A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3520986B1 (fr) 2018-02-01 2020-04-15 INTRAVIS Gesellschaft für Lieferungen und Leistungen von bildgebenden und bildverarbeitenden Anlagen und Verfahren mbH Procédé et dispositif de commande d'au moins un paramètre de processus d'une machine de moulage par injection

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH712830A2 (de) 2016-08-23 2018-02-28 Finatec Holding Ag Optisches Inspektionssystem für Hohlkörper, insbesondere Preformlinge.
DE102019127664A1 (de) * 2019-10-15 2021-04-15 INTRAVIS Gesellschaft für Lieferungen und Leistungen von bildgebenden und bildverarbeitenden Anlagen und Verfahren mbH Verfahren und Anordnung zum Abfüllen von Kunststoffteilen

Citations (4)

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Publication number Priority date Publication date Assignee Title
GB2179648A (en) * 1985-08-26 1987-03-11 Owens Illinois Inc Inspection and sorting of molded containers as a function of mold of origin
US5392928A (en) * 1993-07-22 1995-02-28 Owens-Illinois Glass Container Inc. Inspection and sorting of containers
WO2000061350A1 (fr) * 1999-04-14 2000-10-19 Pressco Technology Inc. Procede et dispositif servant a manipuler des unites ejectees d'une machine a mouler par injection
US20050082707A1 (en) * 2003-08-18 2005-04-21 Kortec, Inc. Automatic process control for a multilayer injection molding apparatus

Family Cites Families (1)

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GB2311948B (en) * 1996-04-08 2000-03-29 Ford Motor Co System for identifying castings and for tracking casting process parameters

Patent Citations (4)

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Publication number Priority date Publication date Assignee Title
GB2179648A (en) * 1985-08-26 1987-03-11 Owens Illinois Inc Inspection and sorting of molded containers as a function of mold of origin
US5392928A (en) * 1993-07-22 1995-02-28 Owens-Illinois Glass Container Inc. Inspection and sorting of containers
WO2000061350A1 (fr) * 1999-04-14 2000-10-19 Pressco Technology Inc. Procede et dispositif servant a manipuler des unites ejectees d'une machine a mouler par injection
US20050082707A1 (en) * 2003-08-18 2005-04-21 Kortec, Inc. Automatic process control for a multilayer injection molding apparatus

Non-Patent Citations (2)

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Title
FUHRMANN G ET AL: "BILDVERARBEITUNGSSYSTEME - EINSATZ IN DER KUNSTSTOFFINDUSTRIE", KUNSTSTOFFBERATER, 201975 1, vol. 41, no. 7/08, 1 July 1996 (1996-07-01), pages 8 - 10, XP000598255, ISSN: 0172-6374 *
FUHRMANN G ET AL: "QUALITAETSSICHERUNG IM SPRITZGIESSPROZESS", KUNSTSTOFFE, CARL HANSER VERLAG, MUNCHEN, DE, vol. 86, no. 12, 1 December 1996 (1996-12-01), XP000679671, ISSN: 0023-5563 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3520986B1 (fr) 2018-02-01 2020-04-15 INTRAVIS Gesellschaft für Lieferungen und Leistungen von bildgebenden und bildverarbeitenden Anlagen und Verfahren mbH Procédé et dispositif de commande d'au moins un paramètre de processus d'une machine de moulage par injection

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