WO2006031165A1 - Procede et appareil pour la separation de corps en plastique - Google Patents

Procede et appareil pour la separation de corps en plastique Download PDF

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Publication number
WO2006031165A1
WO2006031165A1 PCT/SE2005/001235 SE2005001235W WO2006031165A1 WO 2006031165 A1 WO2006031165 A1 WO 2006031165A1 SE 2005001235 W SE2005001235 W SE 2005001235W WO 2006031165 A1 WO2006031165 A1 WO 2006031165A1
Authority
WO
WIPO (PCT)
Prior art keywords
separation
path
disposed
part groups
parts
Prior art date
Application number
PCT/SE2005/001235
Other languages
English (en)
Inventor
Thomas Pettersson
Michael Hermansson
Ingvar Andersson
Original Assignee
Tetra Laval Holdings & Finance S.A.
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 Tetra Laval Holdings & Finance S.A. filed Critical Tetra Laval Holdings & Finance S.A.
Publication of WO2006031165A1 publication Critical patent/WO2006031165A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D3/00—Cutting work characterised by the nature of the cut made; Apparatus therefor
    • B26D3/16—Cutting rods or tubes transversely
    • B26D3/161—Cutting rods or tubes transversely for obtaining more than one product at a time
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D3/00—Cutting work characterised by the nature of the cut made; Apparatus therefor
    • B26D3/16—Cutting rods or tubes transversely
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D3/00—Cutting work characterised by the nature of the cut made; Apparatus therefor
    • B26D3/16—Cutting rods or tubes transversely
    • B26D3/166—Trimming tube-ends
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/4205—Handling means, e.g. transfer, loading or discharging means
    • B29C49/42069—Means explicitly adapted for transporting blown article
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
    • B26D1/02—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a stationary cutting member
    • B26D1/03—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a stationary cutting member with a plurality of cutting members
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor

Definitions

  • the present invention relates to a method and an apparatus for the separation of plastic bodies displaying a plurality of sequentially disposed parts. More specifically, the invention relates to the separation of parts of such a body in which the parts are interconnected at interface regions which display surfaces suitable for rolling.
  • packages for different contents available on the market.
  • these packages may be manufactured from laminated paperboard with or without barrier properties, depending upon the product for which the packages are intended.
  • portions or arrangements of plastic material may be produced in different ways.
  • One method is to form blanks or bodies which are then divided up into the contemplated parts. Such bodies normally display a plurality of sequentially arranged and continuously disposed parts.
  • the body displays a plurality of tops intended for a package, the tops being disposed in sequence.
  • the tops are mutually interconnected, alternatingly via neck-to-neck and edge portion-to-edge portion.
  • the body is to be separated into so-called double tops and that the double tops are separated from one another at the necks by means of "a rotary cutter" of known type.
  • a rotary cutter of known type.
  • On the separation of a body into parts it is important that this take place rapidly and rationally. It is also important to maintain precision in the positioning of the separation incision.
  • the object of the present invention is to realise a method and an apparatus which realises, in an efficient and reliable manner, the separation of a body displaying a plurality of parts disposed in a row and interconnected at interface areas displaying rolling surfaces disposed at a constant radial distance in relation to their respective centres of rotation.
  • the method according to the present invention comprises the following steps:
  • An interface region of the body is caused to roll along a path to a first separation station A where the interface region is centred and rolled over a separator device which divides the body in the interface region and forms two groups of parts.
  • the groups of parts are caused to roll along the path to a second separation zone B where one interface region at each group of parts is centred and each caused to roll over a separator device which separates these groups of parts into new, smaller groups of parts; and that this stepwise separation of groups of parts is repeated until the desired result has been attained and all parts have been exposed.
  • separate groups of parts may be rolled in parallel along the path and the centremost interface region of the body and later the groups of parts, or the interface region of the body and later the groups of parts disposed most proximal the centre, is that interface region which is caused to roll over the separator device.
  • the separator device it will be possible to keep the number of requisite separation zones to a minimum even though only a single interface region at the individual group of parts is centred and separated in each separation zone.
  • the groups of parts may further advantageously be mutually displaced axially, transversely of the direction of the path in connection with separation, in order to realise an axial clearance between the groups of parts.
  • This clearance fulfils a function in the subsequent separation.
  • a knife or similar cutting device which requires space and does not remove material is employed, an axial displacement of newly separated groups of parts will be required.
  • Such a separation method is to be preferred, since, unlike a separation which removes material, it does not create dust or burring. Examples of methods of separation which do not remove material are knives (with or without heating, rotary or stationary), laser beams, hot wires, etc.
  • the apparatus comprises a path with support surfaces against which the interface regions of the body may abut. Carriers are further provided for rolling the body along the path to a first separation zone A, where the carrier is disposed to apply at least one interface region against its support surface.
  • a separator unit comprising, at least one guide means for receiving and centring an interface region and, on the other hand, a separator device for separating the centred interface region which is rolling over the separator device and forms two groups of parts.
  • a second separation zone B displaying two separator units for continued separation of the groups of parts.
  • the second separation zone B there may be provided two separator units for simultaneous separation of the now two groups of parts. Also here, carriers are provided for rolling the groups of parts and applying at least one interface region at each group of parts against the associated support surface, at least that interface region which is rolled through the separator unit being applied.
  • a plurality of separation zones may subsequently be provided after one another along the path.
  • separation zone lettered Z there are preferably provided 2 Z4 number of separator units.
  • the path may advantageously be upwardly curved and preferably endless, which saves floor space.
  • the path may be disposed interiorly in a cylindrical structure displaying an inlet for the body and outlet for separated parts, as well as carriers which are pivotally disposed about a central pivot axis in the cylindrical structure.
  • a number of carriers corresponding to the number of interface regions of the body may be provided in a cluster or set for rolling the body through the apparatus and more than one set may be provided for the simultaneous separation of more than one body. It is further advantageous if the carriers are of continuous operation at a constant speed, which then places demands on the infeed of bodies at the inlet so that this takes place synchronised with the movement of the carriers. In addition, the outlets should be disposed to deflect the separated parts from the path without disrupting/affecting the movement of the carriers.
  • Fig. 1 schematically illustrates one configuration with three separation zones according to one embodiment of the present invention
  • Fig. 2 schematically illustrates a side elevation of one embodiment of the present invention
  • Fig. 3 schematically illustrates a path configuration according to one preferred embodiment of the present invention.
  • Fig. 4 schematically illustrates a skeleton side elevation of one preferred embodiment of the present invention.
  • the point of departure is a body 1 formed by blow moulding of plastic and displaying six mutually subsequent parts in the form of so-called double tops 2 which are mutually interconnected at five rotationally symmetrical interface regions in the form of the necks 3 of the double tops.
  • the body displays two end parts 4 which are connected, one to the neck of the first double top facing away from the remainder and one to the neck of the last double top facing away from the remainder.
  • the end parts 4 are also connected to each respective neck 3 by rotationally symmetric interface regions. These end parts are also to be removed before the double tops are wholly exposed. This implies that a total of seven separation incisions are required in order that all six of the double tops in the body under consideration are to be freely exposed.
  • the body 1 is placed in a path with its longitudinal axis transversely of the direction of the path.
  • the path displays seven support beads 5 extending in the direction of the path and disposed each to receive one of the interface regions 3 which interconnect the parts 2, 4 of the body and which constitute those surfaces against which the body is to be caused to roll.
  • the rolling of the body proper is realised by carriers 6 which will be described in greater detail hereinbelow. These carriers apply the interface regions against the support beads and roll the body in the direction of the path towards a first separation zone A.
  • the interface regions display a rolling surface at a predetermined distance from their centre axis.
  • the rolling surface substantially consists of the radially outermost portions of those threads which are to be found at the necks
  • the rolling surface need not be in the form of a continuous surface but may also consist of one or more surfaces of lesser extent or ridges which roll against the support bead.
  • the body initially meets a guide member 7 in the form of configurational changes in the abutment surface of the centremost support bead, the configurational changes being substantially complementarily formed against the profile curve which the corresponding interface region displays in order, by cooperation therewith, to align the relevant interface region before separation.
  • a cutting device in the form of a cutting edge or knife 8 which extends up over the support surface and which penetrates through the material thickness in the interface region and separates the body into two parts or sections - part groups.
  • the distance along which the knife 8 extends up over the above mentioned support surface is adapted in response to the distance which is required for the interface region to roll a complete revolution. Since the knife does not remove material but penetrates with all of its width into and separates the material, an axial displacement of the thus formed part groups will be permitted by the guide member 7. Preferably, this axial displacement will, after the separation, will be slightly larger than that required by the knife before the guide member 7 releases its control over the two groups of parts. This is in order to create space 9 for an imminent separation step.
  • the carriers 6 continue to roll the now two parallel part groups along the path to a second separation zone B which is schematically illustrated in Fig. Ib.
  • the part groups initially each meet a guide member in the form of configurational changes 7 in the support bead which, for each respective part group, supports the centremost interface surface 3. From the left in Fig. Ib, this corresponds to the second and the sixth support bead 5.
  • each respective centremost interface region of the part groups is in engagement with the guide member 7, they roll over a cutting edge or knife 8 which extends up over each respective support surface and which penetrates through the interface region 3 and separates each respective part group into two sections.
  • a cutting edge or knife 8 which extends up over each respective support surface and which penetrates through the interface region 3 and separates each respective part group into two sections.
  • an axial displacement is permitted and this is permitted after the separation to become slightly larger than that required by the knife so as to create clearance 9 before the guide member 7 releases its influence over the part groups.
  • the now four part groups (which only have one interface region 3 each) now each meet their guide member in the form of configurational changes 7 in the support bead which supports the interface surface 3.
  • each respective interface region 3 of the part groups When each respective interface region 3 of the part groups is in engagement with each respective guide member 7, they roll over a cutting edge or knife 8 which extends up over each respective support surface and which penetrates through the interface region and separates the part groups into two sections each.
  • the path according to the present embodiment is provided as an endless path in that it is curved upwardly until it has formed a loop within a cylindrical structure.
  • an arm 11 is adjustably pivotally disposed, at whose free end a pair 6 of wheels is disposed.
  • the axes of rotation 13, 14 of the pair of wheels are mutually parallel and parallel with the pivot axis 10 of the arm.
  • the axes of rotation of the pair of wheels are further mutually somewhat offset in the tangential direction in relation to the arm 11 in order to be able to accommodate between them an interface region between the parts in the body 1.
  • one set of such arms 11 is disposed in parallel along the centre axis 10 of the structure.
  • said arrangement constitutes the previously mentioned carriers 6.
  • Those wheels which are included in the pairs 6 of wheels of the carrier are here designed with a radial inner portion including a bearing and a radial outer portion of a material which is elastic in the radial direction. This is in order for the wheel, on the one hand, to be able to abut the interface region and, on the other hand, to be capable of absorbing tolerances in the radial distance of the path from the centre of rotation and in the interface region without deforming the interface region.
  • the wheel pairs 6 are disposed so that, together with the support bead 5, they abut against the interface region at three points, mutually displaced 120° about the interface region.
  • a body which is to be separated is introduced into the path via an inlet to a starting position where the body is brought into engagement with a passing carrier 6 which rolls the body and its parts through the separation zones of the path to an outlet where the exposed and separated parts are led out from the path through hatches.
  • Fig. 4 in one preferred embodiment there may be introduced four sets of carriers 6, these sets being mutually offset through 90° about the centre axis 10.
  • four bodies 1 can be separated, which quadruples the capacity compared with the utilisation of but a single set of carriers.
  • the cylindrical configuration of the path has further drastically reduced the floor space which a separation apparatus of this type would otherwise require.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Manufacturing & Machinery (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Abstract

La présente invention se rapporte à un procédé de séparation de corps en plastique présentant une pluralité de pièces disposées mutuellement de manière séquentielle. Plus particulièrement, l'invention se rapporte à la séparation de pièces d'un corps dont les parties sont interconnectées au niveau de régions d'interface qui présentent des surfaces adaptées au roulement. Le procédé comprend les étapes consistant à faire rouler le corps (1) le long d'un chemin jusqu'à une première station de séparation (A), à centrer (7) une région d'interface (3) du corps et à la faire rouler sur un dispositif séparateur (8) divisant le corps dans la région d'interface (3) et formant deux groupes de pièces, à faire en sorte que les groupes de pièces roulent le long du chemin jusqu'à une seconde zone de séparation (B), à centrer une région d'interface (3) au niveau de chaque groupe de pièces et à faire rouler chaque groupe au-dessus d'un dispositif séparateur (8) séparant lesdits groupes de pièces en de nouveaux groupes de pièces plus petits ou en des pièces distinctes et librement exposées, et à répéter cette séparation par étapes des groupes de pièces jusqu'à ce que toutes les pièces soient librement exposées. L'invention se rapporte également à un appareil permettant de mettre en oeuvre ledit procédé.
PCT/SE2005/001235 2004-09-16 2005-08-25 Procede et appareil pour la separation de corps en plastique WO2006031165A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0402250A SE527948C2 (sv) 2004-09-16 2004-09-16 Förfarande och anordning vid delning av plastkroppar
SE0402250-5 2004-09-16

Publications (1)

Publication Number Publication Date
WO2006031165A1 true WO2006031165A1 (fr) 2006-03-23

Family

ID=33308764

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2005/001235 WO2006031165A1 (fr) 2004-09-16 2005-08-25 Procede et appareil pour la separation de corps en plastique

Country Status (2)

Country Link
SE (1) SE527948C2 (fr)
WO (1) WO2006031165A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3432586A (en) * 1966-07-29 1969-03-11 American Can Co Process for forming plastic containers
US4782728A (en) * 1987-04-16 1988-11-08 Thatcher Alan J Automatic cutter for blow molded plastic objects
US4961701A (en) * 1986-11-24 1990-10-09 Hoover Universal, Inc. Apparatus for forming plastic bottle base cups
JPH03197117A (ja) * 1989-12-27 1991-08-28 Kawasumi Lab Inc 医療用容器の押出成形装置及び医療用容器の製造方法
SE508287C2 (sv) * 1997-01-29 1998-09-21 Tetra Laval Holdings & Finance Sätt att tillverka och hantera toppar till förpackningsbehållare
US6675680B1 (en) * 2001-07-10 2004-01-13 Owens-Brockway Plastic Products Inc. Method of and apparatus for handling tandem containers

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3432586A (en) * 1966-07-29 1969-03-11 American Can Co Process for forming plastic containers
US4961701A (en) * 1986-11-24 1990-10-09 Hoover Universal, Inc. Apparatus for forming plastic bottle base cups
US4782728A (en) * 1987-04-16 1988-11-08 Thatcher Alan J Automatic cutter for blow molded plastic objects
JPH03197117A (ja) * 1989-12-27 1991-08-28 Kawasumi Lab Inc 医療用容器の押出成形装置及び医療用容器の製造方法
SE508287C2 (sv) * 1997-01-29 1998-09-21 Tetra Laval Holdings & Finance Sätt att tillverka och hantera toppar till förpackningsbehållare
US6675680B1 (en) * 2001-07-10 2004-01-13 Owens-Brockway Plastic Products Inc. Method of and apparatus for handling tandem containers

Also Published As

Publication number Publication date
SE527948C2 (sv) 2006-07-18
SE0402250D0 (sv) 2004-09-16
SE0402250L (sv) 2006-03-17

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