WO1998013186A1 - Procede de manipulation d'objets tridimensionnels dans un processus de fabrication - Google Patents

Procede de manipulation d'objets tridimensionnels dans un processus de fabrication Download PDF

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Publication number
WO1998013186A1
WO1998013186A1 PCT/FI1997/000580 FI9700580W WO9813186A1 WO 1998013186 A1 WO1998013186 A1 WO 1998013186A1 FI 9700580 W FI9700580 W FI 9700580W WO 9813186 A1 WO9813186 A1 WO 9813186A1
Authority
WO
WIPO (PCT)
Prior art keywords
pieces
strip
piece
manufacturing process
neck
Prior art date
Application number
PCT/FI1997/000580
Other languages
English (en)
Inventor
Jari Ruuttu
Filip Törnroos
Original Assignee
Jari Ruuttu
Toernroos Filip
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 Jari Ruuttu, Toernroos Filip filed Critical Jari Ruuttu
Priority to AU43877/97A priority Critical patent/AU4387797A/en
Publication of WO1998013186A1 publication Critical patent/WO1998013186A1/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
    • B29C45/0003—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor of successively moulded portions rigidly joined to each other

Definitions

  • a method for handling three-dimensional objects in a manufacturing process The invention relates in general to industrial manufacturing processes and in particular to raising the level of automation of processes in which three-dimensional objects are manufactured in long series and in which individual treatment of products may be required.
  • the manufacturing process of a three-dimensional piece-like product depends on whether the piece is machined from solid raw material or whether the shape of the piece is produced by letting a fluid or viscous raw material set into a desired form.
  • machine cutting a blank is separated from a three-dimensional piece of raw material and formed into the desired shape by removing excess material in various manners.
  • compression-based methods the raw material usually is a piece cut from a sheet-like material, formed when two compressor parts, matching in shape, are pressed against the piece from different sides.
  • injection-moulding and similar methods the basic structure of the piece is produced when a fluid or viscous raw material sets or a powdery or granular raw material is compressed into form.
  • Semifinished objects produced by all the basic methods are usually further processed in various surface treatment and finishing stages.
  • batch production a certain number of products are manufactured at a time and placed in a jig in which they can be transferred through the various manufacturing stages and/or from a manufacturing stage to another. The placing of pieces in the jig and their removal from it as well as the moving of the jigs are in this case nonproductive stages.
  • one and the same manufacturing step, such as coating is carried out identically for all pieces in a jig and individual handling of products is not possible except by removing the desired individual pieces from the jig.
  • the handling of semifinished products differs from the above because the packagings manufactured can be surface treated in the press while they are still in the form of a continuous sheet or roll of material (packaging board, for example) after which a cutting machine separates the individual end products and a folding machine provides them with a three-dimensional shape.
  • this process too, is characterised in that when a product becomes three- dimensional, it is an individual piece and its handling requires a separate conveyor.
  • United States Patent document US 4 907 326 discloses a method for manipulation of small-diameter pipes in a manufacturing process.
  • the pipes are moved on the line in a direction perpendicular to their longitudinal axes and adjacent pipes are temporarily connected by necks that allow the strip of pipes to be rolled up.
  • Finnish patent document FI 88597 deals with bushing studs comprising a plastic bushing which contains a metal stud.
  • the plastic bushings are manufactured in a five-chamber mould as a short, five-unit-long strip where adjacent bushings are connected by a neck made of the same material.
  • EP 0 718 087 Al describes the manufacture of small plastic dishes or plates. Extrusion-moulded thermoforming plastic is used to produce two planar layers between which "absorbing material", apparently glue of some kind, is directed. The plates are formed in hollows made on the surface of the shaping drum and they are detached from the strip of material by means of perforation. At the end of the manufacturing line the plates are cut separate and the edges of the strip of material and other superfluous parts are returned to the cycle.
  • EP 0 402 694 A2 has principally the same idea as the French document except that the strip of material is not manufactured by means of lamination.
  • United States Patent document US 3 687 104 shows that a strip of material can be fed from a difficult processing phase to another. Between successive immersion reservoirs there are pressurised air locks into which pressurised air is supplied and the same pressurised air is used to raise the immersing liquids from the bottom of the reservoirs to the operating level. The pressurised air locks prevent the immersion liquids from escaping from the reservoirs.
  • the objects of the invention are achieved by chaining the three-dimensional pieces for the duration of the manufacturing process so that the strip comprised of the pieces can be rolled up or folded into a stack. The chaining is carried out by manufacturing the pieces in a mould which has parts at its ends that create necks connecting consecutive pieces.
  • the method according to the invention is characterised in that the pieces handled in the manufacturing process constitute a strip containing a plurality of consecutive pieces such that the consecutive pieces are joined by flexible necks, which are created in the injection-moulding stage at the beginning of the manufacturing process when the material used for the injection moulding of a certain piece is attached to a protruding tongue on the previous piece.
  • the invention is based on a perception according to which the three-dimensionality of a piece does not prevent a series of consecutive pieces from being processed as a long, flexible strip that can be rolled up or folded into a stack.
  • a strip arranged into a roll or stack a great number of pieces can be easily transferred over long distances between machines carrying out different manufacturing steps.
  • the stages of a process may be located in different places, being of the roll-to-roll type, or they may be made consecutive so that the strip comprised of the pieces runs from a stage to another.
  • consecutive pieces are interconnected by the same material of which they are made, so that no separate taping or support material is needed to attach the pieces to the strip.
  • a strip may contain either consecutive pieces only, so that the width of the strip equals the width of an individual product, or both parallel and consecutive pieces.
  • the manufacturing steps may be repeated identically for all pieces or individual processing can be specified even for a single piece.
  • the strip comprised of the pieces may contain identification information formed on the products or interconnecting necks.
  • FIG. 1 illustrates basic forming according to the invention
  • Fig. 2 illustrates the vacuum evaporation step according to the invention
  • Fig. 3 illustrates the surface treatment step according to the invention.
  • Fig. 4 illustrates an advantageous way of forming the neck between pieces
  • Fig. 5 shows a strip according to the invention containing pieces
  • Fig. 6 shows a second strip according to the invention containing pieces
  • Fig. 7 illustrates the manufacturing of a large piece using the method according to the invention
  • Fig. 8 shows the large piece according to Fig. 7 finished.
  • Fig. 1 schematically illustrates the principle according to the invention in which three-dimensional pieces 1 produced by a certain manufacturing step form a long continuous strip.
  • a press 3 as such is a known tool the jaws 3a and 3b of which are at regular intervals pressed against each other, giving the material injected or otherwise produced between said jaws a certain three-dimensional shape.
  • the raw material used is injection-moulded plastic and the products 1 manufactured are mobile phone shells.
  • the jaws of the press 3 are formed such that a small plastic tongue is left at the "trailing end" (on the right in the Figure) of each piece, said tongue being superfluous with regard to the intended shape of the piece.
  • a small plastic tongue is similarly formed at the "leading end" (on the left in the Figure) of the piece, said tongue being superfluous with regard to the intended shape of the piece and fusing into the tongue at the trailing end of the previous piece.
  • a neck 2 of the same material as the pieces themselves, is thus formed between the consecutive pieces.
  • the three-dimensional shape of the pieces can be produced in many other ways as well. If, for example, the raw material is a strip-like plastic film, the shape of the piece can be created by blowing, pressing or deep- drawing. Then the neck between pieces comprises that part of the plastic film which is left out of the blowing, pressing, or deep-drawing mould, or the mould may have an especially shaped portion for the neck part.
  • the shape of the piece may also be produced by rolling.
  • the strip comprised of pieces is at this stage wound into a roll 4, because in the embodiment according to this example no work stage immediately follows the manufacturing. When the roll is not too tight, the pieces will not be subjected to compressive or twisting strain and, therefore, their three-dimensional form will not suffer.
  • a cushioning and shielding extra strip made of a soft plastic sheet may be added onto the upper or lower side or onto both sides of the strip comprised of pieces.
  • the strip comprised of pieces could be folded into a stack.
  • Fig. 2 illustrates the next step in the same manufacturing process utilising a roll 4 of pieces.
  • Reference designator 1 represents one particular piece and reference designator 2 represents the neck between two consecutive pieces.
  • Reference designator 5 represents a vacuum chamber where a metal plating is vaporised on the surfaces of the pieces e.g. to shield against electromagnetic interferences.
  • the strip comprised of the pieces enters the vacuum chamber and leaves it through a certain gate arrangement (not shown) in which the edges of the gate are pressed against the strip at a certain neck or necks during each vacuum evaporation step.
  • the gates are opened and the strip moves forward for as many pieces as there is room for in the vacuum chamber.
  • Fig. 2 further illustrates how the method according to the invention facilitates the treatment of chained pieces from all sides especially when the interconnecting neck is of the same material as the pieces themselves.
  • the portion left untreated is no bigger than the cross section of the connecting point of the neck and the piece.
  • Fig. 2 shows vacuum evaporation both under and over the piece.
  • Fig. 3 illustrates surface treatment belonging to the same manufacturing process.
  • the strip comprised of evaporated pieces is brought to the surface treatment in a roll 6.
  • the pieces are taken in the form of strip to a dip varnishing tank 7 and thence to surface paint spraying 8 and to a drying machine 9.
  • Other exemplary surface treatment steps illustrated by Fig. 3 include printing 10, attachment of sticker or label 11, and making of identification pattern by laser 12.
  • a laser cutter 13 separates the pieces from the strip, after which they have to be treated as single pieces in general.
  • the finished pieces are wound into a roll 14 or folded into a stack so that they can be easily transported and placed into an assembly phase of a more complex product. If the strip of pieces has multiple pieces parallely or the strip is otherwise adapted such that it is possible to cut off a certain number of pieces without cutting the whole strip, the laser cutter 13 may detach from the strip individual pieces while the rest of the pieces are wound into a roll 14. Pieces cut off may be rejects detected by quality control or pieces detached for special examination for process control or other purposes.
  • the shape of the neck between pieces can contribute to the successfulness of the varnishing or corresponding manufacturing step.
  • a neck has a trough 2a or angle 2b which, with respect to the position of the strip emerging from the dip varnish, is lower than the other parts of the neck. Gravity makes the extra varnish drain into said trough or angle and not to form a thick stripe of varnish on the edge of the piece proper.
  • Fig. 5 shows a strip of pieces according to the invention, seen from a direction perpendicular to the plane of the strip.
  • Pieces 1 are linked by necks 2 comprising two parts.
  • the invention as such does not limit the shape or size of the neck, but it has to be so flexible that the strip of pieces can be rolled up or folded into a stack. Flexing of the neck here also includes flexing along the boundary between a rigid neck and a rigid piece. A fold, or so-called zero-length neck, connecting two consecutive pieces is considered a neck, too. Not all consecutive pieces need have flexible necks between them, these only have to appear at sufficient intervals. Above it was described how in a preferred embodiment the necks are made of the same material as the pieces themselves.
  • Fig. 6 shows a second strip of pieces according to the invention, seen from a direction perpendicular to the plane of the strip.
  • the pieces 1 are connected to each other both consecutively and parallely.
  • two pieces connected consecutively are linked together by a similar neck portion 2 as in Fig. 5.
  • a certain neck portion 15 links four adjacent pieces together.
  • arrow 16 shows the strip's direction of movement
  • arrow 17 shows the direction perpendicular to the direction of movement.
  • the Figure shows only part of the pieces in the strip.
  • Figs. 7 and 8 illustrate an exemplary embodiment for manufacturing a large three- dimensional piece.
  • the end product is a box-shaped lamp reflector and its manufacturing material is sheet metal or plastic sheet.
  • a part 1 has been cut or die-cut from an elongated strip of material, said part comprising a rectangular central plate 18, a hole 19 in the middle of said central plate, diagonal ridges 20 stiffening and shaping the central plate, rectangular side walls 21 connecting with the long sides of the central plate, T-shaped locking branches 22 at the ends of the side walls, rectangular end walls 23 joined to the short sides of the central plate and on both of them two curved locking gaps 24.
  • Said part is connected with the next and previous similar part (not shown) by means of a two-part neck 2 so that the consecutive pieces form a strip.
  • the pieces travel through the various manufacturing steps in the form of strip, said steps including, depending on the properties required of the reflector, metallisation, painting, varnishing, attachment of adhesive labels, identification marking and/or other known steps.
  • the forming of the pieces into the final three-dimensional shape is preferably carried out as the last step to take full advantage of the strip-likeness according to the invention.
  • Fig. 8 shows a finished reflector viewed from the direction of an end wall, the side walls and end walls having been bent 90 degrees from their original position around the fold connecting the walls and central plate, and the locking branches on the side walls having been pushed into the locking gaps in the end walls.
  • a product in a certain strip it is possible to identify a product in a certain strip.
  • a laser printer or other controllable marking device which produces an individual serial number or a corresponding marking at regular intervals or, if random sampling is required, randomly either onto a piece or onto the neck between pieces.
  • a reading device which reads the marking and controls the operation of the process in a desired manner. Manufacturing of individual products as such does not require identification markings; for example, in computer-controlled spray painting, each piece in the strip can be painted with a different colour.
  • identification markings make it possible to direct individual treatment specifically to a certain piece.
  • Information about the quantities of successive pieces conveyed within the process is a sort of identification, too.
  • a quality control element may e.g. inform a later marking element about a fault it has detected and since the marking element knows it is located X pieces later in the line than the quality control element, it waits for a time corresponding to the transfer of X pieces before making a rejection mark on the piece passing it.
  • the strip-handling of pieces according to the invention reduces non-productive work carried out for fransporting individual pieces in the various phases of the manufacturing or refining process.
  • the invention increases the level of automation of the process. Identification of pieces transported in a strip can be easily carried out either by using identification markings or by counting the pieces. Thus it can be said that the invention achieves its objects.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)

Abstract

La présente invention concerne un procédé de fabrication de pièces en trois dimensions, les pièces (1) constituant une bande comprenant plusieurs pièces consécutives reliées par un cordon souple (2) constitué d'un matériau identique ou différent de celui des pièces. La bande peut être enroulée pour former un rouleau (6) ou pliée en une pile de façon à transférer les pièces entre les différentes étapes de la fabrication. Les étapes de la fabrication se déroulent selon le principe de rouleau à rouleau et peuvent comprendre, par exemple, une évaporation sous vide (5), un vernissage (7), une peinture (8), une impression (10), une apposition d'étiquette adhésives (11) et un marquage par laser (12). De grandes pièces peuvent être fabriquées en les coupant dans une feuille à plat (18, 24), la forme tridimensionnelle étant obtenue ultérieurement par cintrage.
PCT/FI1997/000580 1996-09-27 1997-09-26 Procede de manipulation d'objets tridimensionnels dans un processus de fabrication WO1998013186A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU43877/97A AU4387797A (en) 1996-09-27 1997-09-26 A method for handling three-dimensional objects in a manufacturing process

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI963873A FI963873A (fi) 1996-09-27 1996-09-27 Menetelmä kolmiuloitteisten esineiden käsittelemiseksi valmistusprosessissa
FI963873 1996-09-27

Publications (1)

Publication Number Publication Date
WO1998013186A1 true WO1998013186A1 (fr) 1998-04-02

Family

ID=8546758

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI1997/000580 WO1998013186A1 (fr) 1996-09-27 1997-09-26 Procede de manipulation d'objets tridimensionnels dans un processus de fabrication

Country Status (3)

Country Link
AU (1) AU4387797A (fr)
FI (1) FI963873A (fr)
WO (1) WO1998013186A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000050212A1 (fr) * 1999-02-24 2000-08-31 Jari Ruuttu Procede et appareil de maintien de pieces dans un procede de fabrication
WO2001038064A1 (fr) * 1999-11-26 2001-05-31 It Innovations Finland Oy Procede et appareil destines a traiter des objets moules par injection dans un procede de production
WO2004096519A1 (fr) * 2003-04-29 2004-11-11 Perlos Oyj Agencement permettant de controler la qualite de composants de moulage par injection
WO2005046956A1 (fr) * 2003-10-24 2005-05-26 Toernroos Filip Positionnement d'un systeme porteur pour operations d'affinage
CN110422581A (zh) * 2019-08-15 2019-11-08 浙江海洋大学 一种鲣鱼鱼柳柔性挤压输送设备

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0418993A2 (fr) * 1989-09-19 1991-03-27 Autosplice, Inc. Assemblage de composants électroniques moulés de façon continue
US5148596A (en) * 1989-09-19 1992-09-22 Autosplice, Inc. Continuous molded electronic component assembly
US5428890A (en) * 1992-02-26 1995-07-04 Zahn; Irvin Method of making continuous molded electrical connectors and making connections thereto

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0418993A2 (fr) * 1989-09-19 1991-03-27 Autosplice, Inc. Assemblage de composants électroniques moulés de façon continue
US5148596A (en) * 1989-09-19 1992-09-22 Autosplice, Inc. Continuous molded electronic component assembly
US5428890A (en) * 1992-02-26 1995-07-04 Zahn; Irvin Method of making continuous molded electrical connectors and making connections thereto

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000050212A1 (fr) * 1999-02-24 2000-08-31 Jari Ruuttu Procede et appareil de maintien de pieces dans un procede de fabrication
WO2001038064A1 (fr) * 1999-11-26 2001-05-31 It Innovations Finland Oy Procede et appareil destines a traiter des objets moules par injection dans un procede de production
US6797214B1 (en) 1999-11-26 2004-09-28 It Innovations Finland Oy Method and apparatus for treating injection-moulded objects in a production process
WO2004096519A1 (fr) * 2003-04-29 2004-11-11 Perlos Oyj Agencement permettant de controler la qualite de composants de moulage par injection
WO2005046956A1 (fr) * 2003-10-24 2005-05-26 Toernroos Filip Positionnement d'un systeme porteur pour operations d'affinage
CN110422581A (zh) * 2019-08-15 2019-11-08 浙江海洋大学 一种鲣鱼鱼柳柔性挤压输送设备

Also Published As

Publication number Publication date
FI963873A0 (fi) 1996-09-27
FI963873A (fi) 1998-03-28
AU4387797A (en) 1998-04-17

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