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WO2010140153A1 - Appareil de moulage par injection permettant la production de goutteurs, et son procédé - Google Patents

Appareil de moulage par injection permettant la production de goutteurs, et son procédé Download PDF

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Publication number
WO2010140153A1
WO2010140153A1 PCT/IL2010/000445 IL2010000445W WO2010140153A1 WO 2010140153 A1 WO2010140153 A1 WO 2010140153A1 IL 2010000445 W IL2010000445 W IL 2010000445W WO 2010140153 A1 WO2010140153 A1 WO 2010140153A1
Authority
WO
WIPO (PCT)
Prior art keywords
mold
drip emitter
rotating
drip
faces
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.)
Ceased
Application number
PCT/IL2010/000445
Other languages
English (en)
Inventor
Eli Farkash
Shalom Korkus
Arnon Magidess
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.)
PLASEL Ltd
Original Assignee
PLASEL 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 PLASEL Ltd filed Critical PLASEL Ltd
Publication of WO2010140153A1 publication Critical patent/WO2010140153A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/03—Injection moulding apparatus
    • B29C45/04—Injection moulding apparatus using movable moulds or mould halves
    • B29C45/0441—Injection moulding apparatus using movable moulds or mould halves involving a rotational movement
    • B29C45/045—Injection moulding apparatus using movable moulds or mould halves involving a rotational movement mounted on the circumference of a rotating support having a rotating axis perpendicular to the mould opening, closing or clamping direction
    • 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
    • B29C45/0053—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor combined with a final operation, e.g. shaping

Definitions

  • the present invention relates to injection molding apparatus and methods for producing drip emitters, and more particularly, to such apparatus and methods having a rotating mold assembly.
  • resin is fed into the machine through the hopper.
  • Colorants if desired, may be fed to the machine directly after the hopper.
  • the resins enter the injection barrel by gravity though the feed throat. After entering the barrel, the resin is heated to the requisite melting temperature.
  • the injection of the resin into the mold may be effected by a reciprocating screw or by other means known to those skilled in the art of injection molding.
  • the mold is adapted to receive the plastic and to shape the plastic to a desired, pre-determined shape.
  • the mold is cooled constantly to a temperature that allows the resin to solidify.
  • the mold plates may be held together by hydraulic force or by mechanical force.
  • an injection-molding apparatus for producing drip emitters, the apparatus including: (a) a feed arrangement, including at least a first feed hopper, the arrangement adapted to receive a solid feed material; (b) an injection arrangement including: (i) a feed barrel, fluidly communicating with the feed hopper, (ii) at least one heating element, thermally associated with the barrel, and adapted to heat a volume within the barrel, whereby the feed material is transformed into a viscous heated feed material; (iii) an injection nozzle, fluidly communicating with the volume, and (iv) a mechanically-driven delivery mechanism, at least partially disposed within the barrel, and adapted to advance the feed material towards the injection nozzle, and to deliver the heated feed material, at superatmospheric pressure, through the nozzle; (c) a mold arrangement including: (i) a stationary mold; (ii) a mechanically-driven rotating mold, having at least two faces, each having at least one drip emitter cavity set having a
  • an injection-molding apparatus for producing drip emitters, the apparatus including: (a) a feed hopper adapted to receive a solid feed material; (b) an injection arrangement including: (i) a feed barrel, fluidly communicating with the feed hopper; (ii) at least one heating element, thermally associated with the barrel, and adapted to heat a volume within the barrel, whereby the feed material is transformed into a viscous heated feed material; and (iii) an injection nozzle, through which is delivered the heated feed material, at superatmospheric pressure; (c) a mold arrangement including: (i) a stationary mold; (ii) a mechanically-driven rotating mold, having at least two faces, each of the faces adapted to receive the heated feed material to form at least one drip emitter base and a drip emitter cover disposed substantially alongside the base, the stationary mold and the rotating mold adapted whereby each of the faces rotates into a stop position opposite the stationary mold; (d) a clamping assembly including: (i) a feed barrel, fluidly communicating
  • an apparatus for producing a drip emitter by means of injection molding substantially as described herein, the apparatus including any feature described, either individually or in combination with any feature, in any configuration.
  • a method of producing a drip emitter by means of injection molding substantially as described herein, the method including any feature described, either individually or in combination with any feature, in any configuration.
  • a method of producing drip emitters by means of injection molding including the steps of: (a) providing an injection-molding apparatus for producing drip emitters, as described herein; (b) rotating the rotating mold to bring a first face of the faces into the position opposite the stationary mold; (c) injecting the heated feed material through the nozzle and into the plurality of cavity pairs, via the stationary mold, by means of the injection arrangement, to produce at least partially filled drip emitter body cavity inserts and at least partially filled drip emitter cover cavity inserts; (d) further rotating the rotating mold into a second position, and (e) effecting the placement of the membrane units within the at least partially filled drip emitter body cavity inserts, by means of the gripping unit.
  • the rotating mold has at least 3 or at least 4 of the faces. According to still further features in the described preferred embodiments, the rotating mold has a substantially cubic or elongated cubic shape.
  • the apparatus further includes a membrane delivery system adapted to provide the membrane units to the gripping unit.
  • the membrane delivery system includes a membrane feed line adapted to provide the membrane units.
  • the clamping assembly further includes a driving and locking system adapted to drive the platen and the plate along the at least one tie bar.
  • the rotating mold is a substantially vertically rotating mold.
  • the apparatus further includes an optical inspection unit disposed and adapted to capture images of an area within the faces of the rotating mold.
  • the controller is adapted to receive, after the gripping unit effects the placement of the membrane units within the filled drip emitter body cavity inserts, data pertaining to the images, from the inspection unit, and to determine, from the data, positions of each of the membrane units.
  • the controller is adapted to receive data pertaining to the images, from the inspection unit, and to determine, from the data, positions of each of the membrane units in relation to each the respective one of the at least partially filled body cavity inserts.
  • the apparatus further includes a flipping mechanism adapted to flip a drip emitter cover from each the filled cover cavity insert to cover each respective membrane unit of the membrane units.
  • the apparatus further includes an inspection unit disposed and adapted to ascertain a positioning of each the cover in relation to the respective membrane unit.
  • the inspection unit includes a sensor.
  • the senor includes a pressure sensor.
  • the gripping unit is adapted to simultaneously grip the plurality of membrane units, and wherein the placement of each of the membrane units is a substantially simultaneous placement.
  • the clamping assembly when one of the faces is disposed in the stop position opposite the stationary mold, the clamping assembly is adapted to urge the moving platen and the support plate along the longitudinal axis to juxtapose the stationary mold and the rotating mold.
  • the robot arm includes a rotating or pivoting robot arm.
  • the robot arm includes a vertically extending robot arm, associated with, or attached to, the rotating or pivoting arm.
  • a vertically extending robot arm is associated with, or attached to, the robot arm, and wherein the gripping unit is associated with, or attached to, the vertically extending robot arm.
  • the method further includes the step of: (f) performing step (c) on a second face of the faces.
  • the method further includes the step of capturing images of an area within the faces of the rotating mold by means of an optical inspection unit, to determine at least one of: quality of drip emitter bodies in the filled body cavity inserts, quality of drip emitter covers in the filled cover cavity inserts, and membrane positioning.
  • the method further includes the steps of further rotating the rotating mold into a third position, and flipping each of the covers, on top of the membrane units, thereby covering each drip emitter body within the partially filled body cavity inserts, to produce the drip emitters.
  • the method further includes the steps of further rotating the rotating mold into a third position; flipping each of the covers, on top of the membrane units, thereby covering each drip emitter body within the partially filled body cavity inserts, and fixedly attaching each of the covers to the each drip emitter body, to produce the drip emitters.
  • the method further includes the step of inspecting, by means of a sensor disposed in the injection-molding apparatus, a positioning of each of the covers. According to still further features in the described preferred embodiments, the method further includes the steps of further rotating the rotating mold into a fourth position, and ejecting the drip emitters.
  • the method further includes the steps of further rotating the rotating mold into a third position; flipping each of the covers, on top of the membrane units, thereby covering each drip emitter body within the partially filled body cavity inserts, to produce the drip emitters, and, in the third position, performing step (e) on the second face.
  • the method further includes the step of performing step (c) on a third face of the faces, while the rotating mold remains in the third position.
  • Figure IA shows a schematic side view, with hidden lines, of an injection- molding apparatus according to the present invention, the mold being shown in an open position;
  • Figure IB shows a schematic top view, with hidden lines, of the inventive injection-molding apparatus of Figure IA;
  • Figure 1C is a schematic, perspective drawing of the inventive injection- molding apparatus of Figure IA;
  • Figure 2A is a schematic, perspective drawing of a cavity set having a plurality of cavity inserts including drip emitter body cavity inserts and their respective drip emitter cover cavity inserts;
  • Figure 2B is a schematic, magnified, partial view of Figure 2A, showing two pairs of cavity inserts in greater detail;
  • Figure 3 provides 13 operating stages of the mold used in conjunction with the apparatus and method of the present invention
  • Figure 4A provides a schematic, top perspective view of one embodiment of an exemplary injection-molded drip emitter, manufactured according to the present invention
  • Figure 4B provides a cross-sectional view of the drip emitter of Figure 4A;
  • Figure 5 A provides a schematic, perspective drawing view of the drip emitter of Figure 4A.
  • Figure 5B provides a partially cut away view of the drip emitter of Figure 5 A, in which the both the membrane and the snap fit mechanism of the lid are exposed.
  • Figure IA is a schematic, perspective drawing of an injection-molding apparatus 100 according to the present invention, the mold being shown in an open position.
  • Figure IB is a schematic, top perspective drawing of the injection-molding apparatus of Figure IA.
  • Injection-molding apparatus 100 includes the following numbered components:
  • Robotic Arm 144 Vertically Extending Robotic Arm 144
  • thermoplastic feed material may be delivered from a feed hopper 102 to a barrel 104.
  • the feed material may be heated in heaters 106 and is then delivered by a mechanically-driven delivery mechanism 107 (which may include, by way of example, a conveying screw and an injecting piston) through a nozzle 108 at high pressure.
  • the heating may be at least partially effected by the shear forces within the injection unit.
  • the heated thermoplastic feed material is introduced to mold assembly 150 via openings in a stationary mold 112 (associated with a stationary platen 122) to a surface or face 129 of a rotating mold 120.
  • a clamping unit or assembly 130 including a moving platen 124, a support plate 128 adapted to support moving platen 124, and at least one tie bar 134 (and most typically, a plurality of tiebars), adapted to guide moving platen 124 and support plate 128, such that platen 124 and plate 128 move along a longitudinal axis of tie bar 134.
  • Clamping unit or assembly 130 may typically have a drive mechanism (not shown) including a motor or other means known to those skilled in the art, adapted to move platen 124 and plate 128 with respect to tie bar 134.
  • the drive mechanism may be responsive to a controller 180.
  • a mold plate 125 which may be part of mold assembly 150.
  • an inspection unit e.g., a side inspection unit having a sensor 126 (such as a pressure sensor) adapted to detect if a drip emitter cover is securely in place.
  • Membrane delivery system 160 includes a membrane hopper 161, which may be adapted to contain a plurality of membrane units (typically made of silicone), and to deliver membranes to membrane conveyor or feed line 162.
  • the delivery mechanism may be a vibrating mechanism.
  • a robot assembly 140 may be adapted and configured to transfer a membrane or a plurality of membranes from membrane feed line 162 to a surface of the partially formed emitters disposed in rotating mold 120.
  • Robot assembly 140 may advantageously be equipped with a rotating robotic arm 142, a vertically extending robotic arm 144, and a gripping unit or assembly 146.
  • Robot assembly 140, including gripping unit 146, and rotating mold 120 may be driven by at least one drive mechanism including motors or other means known to those skilled in the art.
  • Robot assembly 140, gripping unit 146, and rotating mold 120 may be responsive (spatial motion, synchronization) to a controller 180.
  • Gripping unit 146 may grip or capture a membrane or may simultaneously grip or capture a plurality of membranes, e.g., from membrane feed line 162, and, after appropriate spatial movement by at least one of the robotic arms, release the membranes onto a surface of the at least partially formed emitter bodies disposed in a cavity set on a face of rotating mold 120.
  • Gripping unit 146 may use vacuum or suction means to capture the individual membranes.
  • Gripping unit 146 may be equipped with individual capturing sites, each one for capturing an individual membrane at a pre-determined or pre-configured location on the bottom surface of the unit.
  • Gripping unit 146 enables multiple (e.g., 2 to 128, more typically, at least 12 to 128) membranes to be gripped by the unit, and to be delivered to rotating mold 120, whereby each membrane is released into a particular location, e.g., within respective cavities or recesses within each of the at least partially formed emitters or emitter bodies.
  • One method of precisely locating the membranes to be gripped is to adjust the speed of membrane conveyor or feed line 162 such that the membranes are disposed at the requisite intervals or pitch with respect to the membrane openings or recesses in the emitter base.
  • the requisite spacing may be achieved using at least one additional robot arm or gripper.
  • An optical inspection unit 136 may be adapted to inspect a quality of the drip emitter fillings. Following the insertion of the membranes into the emitter bodies, optical inspection unit 136 may be adapted to inspect a positioning of at least one membrane.
  • Figure 1C is a schematic, perspective drawing of injection-molding apparatus 100 of Figure IA;
  • Figure 2A is a schematic, perspective drawing of a cavity set 121 having a plurality of cavity inserts including drip emitter body cavity inserts 123 and their respective drip emitter cover cavity inserts 127.
  • Figure 2B is a schematic, magnified, partial view of Figure 2A, showing two pairs of cavity inserts in greater detail.
  • Each pair includes one emitter body cavity insert 123 along with an adjacent emitter cover cavity insert 127.
  • Within emitter body cavity insert 123 may be seen a schematic negative form of a drip emitter labyrinth 123A.
  • Rotating mold 120 may preferably have a cubic or elongated cubic shape. Typically, each of the at least 4 rotating faces is adapted whereby at least one major process step is effected at each of the at least four stop positions. The steps, which may be better understood with reference to Figure 3, are described below in stages or sub- steps. The timing of each of the operations may be controlled by controller 180.
  • Stage (a) The mold is closed. In this position, injection into Face 1 may be effected to form an emitter base or housing and a lid or cover alongside the housing.
  • Stage (c) The rotating mold is rotated.
  • Stage (e) The rotating mold is further rotated until a 90° rotation is achieved, whereby Face 1 faces up.
  • Stage (f) The mold is closed. Injection into Face 2 may be effected according to stage (a).
  • Stage (g) Top (typically optical) inspection to determine the quality of part (emitter housing and cover) fillings.
  • the emitter housing and cover as shown, are ready for inspection.
  • Each drip emitter cover alongside the emitter housing may be flipped (typically about 180°) to cover each respective inserted membrane.
  • the flipping may be achieved using a rack and gear system, or by other means known to those skilled in the art.
  • the closed membrane-filled drip emitter is shown.
  • Stage (j) The mold is opened and rotated.
  • Stage (k) The rotating mold is further rotated until a 90° rotation is achieved.
  • the lid may be fixedly/permanently attached to the housing, e.g., by pressure against a snap fit or by a welding operation. Face 2 is now facing up, ready for stage (g). Injection into Face 3 may be effected according to stage (a).
  • Stage (1) Side inspection of cover positioning in emitters of Face 1.
  • the mold may also exert pressure on the cover to urge the cover into a secure position.
  • a sensor such as a pressure sensor detects if the cover is securely in place.
  • Stage (m) After a rotation of 90° (whereby Face 1 assumes a down position), the formed drip emitters are ejected. With Face 1 in this down position, Face 2 may undergo stages (k) and (1); Face 3 may undergo stages (g), (h) and (i); injection into Face 4 may be effected according to stage (a).
  • Figure 4A provides a schematic, top perspective view of one embodiment of an injection-molded drip emitter 400, manufactured according to the present invention.
  • the labyrinth portion of the emitter may be structured according to various designs known in the art.
  • Figure 4B provides a cross-sectional view of the drip emitter of Figure 4A.
  • a snap fit mechanism 402 that enables a substantially fixed and permanent closure of emitter lid or cover 406 with respect to the emitter base or housing 404. This closure preferably fixes membrane 408 securely in place.
  • Figure 5 A provides a schematic, perspective drawing view of the drip emitter of
  • Figure 4A Figure 5B provides a partially cut away view of the drip emitter of Figure 5A, in which the both membrane 408 and snap fit mechanism 402 of cover 406 are exposed.
  • Snap fit mechanism 402 may extend along a portion of the perimeter of the cover, or along the perimeter of the cover in its entirety. It will be appreciated that certain features of the invention, which are, for clarity, described in the context of separate embodiments, may also be provided in combination in a single embodiment. Conversely, various features of the invention, which are, for brevity, described in the context of a single embodiment, may also be provided separately or in any suitable sub-combination.

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  • 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 appareil de moulage par injection et un procédé de production de goutteurs, l'appareil comprenant: une trémie d'alimentation; un agencement d'injection comprenant: une cuve d'alimentation, un élément de chauffe et une buse d'injection pour distribuer le matériau d'alimentation chauffé, un agencement de moule comprenant: un moule fixe; un moule rotatif comprenant au moins deux faces, chacune des faces étant conçue pour recevoir le matériau afin de former au moins une base de goutteur, et un couvercle de goutteur disposé sensiblement le long du bord de la base, chacune des faces tournant jusqu'à une position d'arrêt opposée au moule fixe; un ensemble de fixation comprenant: un plateau mobile, et une plaque de support prévue pour supporter le plateau; un ensemble robot comprenant un bras de robot, et une unité de préhension conçue pour saisir des unités de membrane et pour effectuer le placement de chacune des unités de membrane à l'intérieur des bases de goutteurs respectives; et une unité de commande à laquelle répond l'ensemble robot, l'unité de préhension effectuant le placement des unités de membrane à l'intérieur de chacune des bases de goutteurs.
PCT/IL2010/000445 2009-06-05 2010-06-06 Appareil de moulage par injection permettant la production de goutteurs, et son procédé Ceased WO2010140153A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US18453609P 2009-06-05 2009-06-05
US61/184,536 2009-06-05

Publications (1)

Publication Number Publication Date
WO2010140153A1 true WO2010140153A1 (fr) 2010-12-09

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Family Applications (1)

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Country Status (1)

Country Link
WO (1) WO2010140153A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140134366A1 (en) * 2011-06-30 2014-05-15 Foboha Gmbh Device and method for producing injection-molded parts which comprise different components
WO2021134141A1 (fr) * 2019-12-29 2021-07-08 郭秋盛 Nouvelle machine de moulage par injection

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US20050184434A1 (en) * 2002-05-29 2005-08-25 Razmik Akopyan Injection molding of polymers by microwave heating
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WO2007049053A1 (fr) 2005-10-27 2007-05-03 Jonathan George Cordy Angell Connecteur de tuyau flexible
JP2007195851A (ja) 2006-01-30 2007-08-09 Sumitomo Bakelite Co Ltd チューブ接続コネクタ
US20080138458A1 (en) * 2002-03-13 2008-06-12 Nissei Kabushiki Kaisha Method and mold for manufacturing biodegradable molded articles
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Publication number Priority date Publication date Assignee Title
DE8612396U1 (de) 1986-05-06 1986-08-28 Rapp, Wilfried, 7298 Loßburg Vorrichtung zum Anschließen bzw. Verbinden von Schlauchenden
US4923226A (en) 1987-06-23 1990-05-08 Proprietary Technology, Inc. Apparatus for attaching a hose to a fitting
US5258611A (en) * 1991-09-11 1993-11-02 Verreries Du Languedoc Light emission or absorption device for the contactless inspection of articles having a plurality of light sources and an elongate light guide
US5332382A (en) * 1991-09-30 1994-07-26 Canon Kabushiki Kaisha Motor-driven vertical type injection molding apparatus
US6752581B1 (en) * 1994-06-10 2004-06-22 Johnson & Johnson Vision Care, Inc. Apparatus for removing and transporting articles from molds
US5728409A (en) * 1996-03-06 1998-03-17 Husky Injection Molding Systems Ltd. Turret article molding machine
US6206305B1 (en) * 1997-10-14 2001-03-27 Hydroplan Engineering Ltd. Irrigation emitter unit
DE29803673U1 (de) 1998-03-03 1999-07-15 Marley-Werke GmbH, 31515 Wunstorf Rohrverbindung
US20050156343A1 (en) * 1999-04-14 2005-07-21 Pressco Technology Inc. Method and apparatus for handling parts ejected from an injection molding machine
US20030003178A1 (en) * 1999-12-28 2003-01-02 Masahiro Kami Mold clamping device, method of increasing/decreasing pressure for such device, and mold releasing method
US20020074676A1 (en) * 2000-12-16 2002-06-20 Kachnic Edward F. Part-forming machine having an in-mold integrated vision system and method therefor
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US20080138458A1 (en) * 2002-03-13 2008-06-12 Nissei Kabushiki Kaisha Method and mold for manufacturing biodegradable molded articles
US20050184434A1 (en) * 2002-05-29 2005-08-25 Razmik Akopyan Injection molding of polymers by microwave heating
US20050271765A1 (en) * 2002-11-05 2005-12-08 Vanderploeg James A Side shuttle apparatus and method for an injection molding machine
US20050019443A1 (en) * 2003-03-17 2005-01-27 Boyd Kathleen C. Rotary injection molding apparatus and method for use
WO2007049053A1 (fr) 2005-10-27 2007-05-03 Jonathan George Cordy Angell Connecteur de tuyau flexible
JP2007195851A (ja) 2006-01-30 2007-08-09 Sumitomo Bakelite Co Ltd チューブ接続コネクタ
US20090227954A1 (en) 2008-03-06 2009-09-10 Loiterman David A Multisegment Interconnect Device for Elastic Tubing

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140134366A1 (en) * 2011-06-30 2014-05-15 Foboha Gmbh Device and method for producing injection-molded parts which comprise different components
US9718227B2 (en) * 2011-06-30 2017-08-01 Foboha Gmbh Device and method for producing injection-molded parts which comprise different components
WO2021134141A1 (fr) * 2019-12-29 2021-07-08 郭秋盛 Nouvelle machine de moulage par injection

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