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WO2011001358A2 - Appareil de chauffage de paraisons en matériau thermoplastique - Google Patents

Appareil de chauffage de paraisons en matériau thermoplastique Download PDF

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Publication number
WO2011001358A2
WO2011001358A2 PCT/IB2010/052939 IB2010052939W WO2011001358A2 WO 2011001358 A2 WO2011001358 A2 WO 2011001358A2 IB 2010052939 W IB2010052939 W IB 2010052939W WO 2011001358 A2 WO2011001358 A2 WO 2011001358A2
Authority
WO
WIPO (PCT)
Prior art keywords
rod
parisons
conveyor
parison
rotary member
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/IB2010/052939
Other languages
English (en)
Other versions
WO2011001358A3 (fr
Inventor
Maurizio Borgatti
Paolo Dalle Vacche
Massimo Morovingi
Fiorenzo Parrinello
Emilio Re
Gabriele Stocchi
Andrea Zanardi
Stefano Cassani
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.)
Sacmi Imola SC
Original Assignee
Sacmi Imola SC
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 Sacmi Imola SC filed Critical Sacmi Imola SC
Priority to EP10740299A priority Critical patent/EP2448744A2/fr
Publication of WO2011001358A2 publication Critical patent/WO2011001358A2/fr
Publication of WO2011001358A3 publication Critical patent/WO2011001358A3/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
    • 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
    • B29C49/42093—Transporting apparatus, e.g. slides, wheels or conveyors
    • B29C49/42101—Conveyors, e.g. flat conveyor or clamping between two bands
    • 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
    • B29C49/4236—Drive means
    • B29C49/42362—Electric drive means, e.g. servomotors
    • 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
    • B29C49/64—Heating or cooling preforms, parisons or blown articles
    • B29C49/68—Ovens specially adapted for heating preforms or parisons
    • 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
    • B29C49/78—Measuring, controlling or regulating
    • 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
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
    • B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
    • B29C2035/0822—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation using IR radiation
    • 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
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/0715—Preforms or parisons characterised by their configuration the preform having one end closed
    • 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
    • B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
    • B29C49/06—Injection blow-moulding
    • 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
    • B29C49/42051—Means for stripping, aligning or de-stacking
    • B29C49/42053—Stripping preforms from moulds, e.g. from injection moulds or cores
    • 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
    • B29C49/42073—Grippers
    • B29C49/42085—Grippers holding inside the neck
    • 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
    • B29C49/64—Heating or cooling preforms, parisons or blown articles
    • B29C49/68—Ovens specially adapted for heating preforms or parisons
    • B29C49/6835—Ovens specially adapted for heating preforms or parisons using reflectors
    • 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
    • B29C49/64—Heating or cooling preforms, parisons or blown articles
    • B29C49/68—Ovens specially adapted for heating preforms or parisons
    • B29C49/685—Rotating the preform in relation to heating means

Definitions

  • This invention relates to an apparatus for heating parisons of thermoplastic material.
  • the parisons are used to make containers by blow-moulding.
  • the parisons are heated so that they are in the required thermal state when they are blown into the moulds of the blow-moulding machine.
  • prior art apparatus comprises a conveyor used to transport the parisons along a feed path through a heating tunnel.
  • the conveyor is associated with a plurality of elements for supporting the parisons.
  • These supporting elements have a structure fixed to the conveyor and a rod rotatably associated with the structure to turn about a longitudinal axis.
  • the rod is movable axially relative to the structure between a lowered position, where the bottom end of the rod is operatively inserted in a parison in such a way as to hold it and rotate it about its longitudinal axis, and a raised position, where the parison is disengaged from the rod.
  • This allows the parison to be picked up by the heating tunnel feed carousel and to be delivered to the transfer carousels which carry it to the blow-moulding carousel.
  • Some prior art apparatuses comprise a chain or a toothed crown wheel which is integral with the frame of the apparatus and, hence, in a fixed position relative to the conveyor.
  • Each rod has keyed to it a toothed wheel which meshes with the chain or toothed crown wheel in such a way that its motion (of revolution) as one with the conveyor causes the rods to rotate about their longitudinal axes thanks to the interaction of the toothed wheels with the fixed toothed crown wheel or chain.
  • the chain or toothed crown wheel thus constitutes a linking element kinematically coupled to rotary means (that is, the toothed wheels) rotatably associated with the parison supporting structures and coupled to the rods in such a way as to drive them rotationally about their longitudinal axes as a result of the movement of the rods as one with the conveyor.
  • pan sons engaged with the rods are rotated about their longitudinal axes as they move through the heating tunnel.
  • the rotation speed of the rods about their longitudinal axes is set by the gear ratio of the chain and sprockets and by the conveyor speed which is in turn set by the speed of the blow-moulding machine located downstream of the heating apparatus and is any in case linked to the required container output per hour of the blow-moulding equipment.
  • the rod is pressed down into the parison so that a pick-up end portion of it engages the interior of the parison. Since the vertical movement is accompanied by the rotation of the rod about its axis, there is a risk of damaging the parison and a risk of troubles in parison gripping action.
  • some apparatuses currently in use are designed in such a way that the toothed wheel of the rods mesh with the chain only along a specific part of the conveyor path (in particular, the part where the parisons are inside the heating tunnel) whilst the rods do not mesh when they are in the part of the path where they interact with the parisons in order to pick them up.
  • This invention has for an aim to provide a thermoplastic parison heating apparatus that overcomes the above mentioned drawbacks of the prior art.
  • thermoplastic parison heating apparatus that is constructionally very simple and allows parison heating conditions to be optimized.
  • Another aim of the invention is to provide a thermoplastic parison heating apparatus that allows to optimize the speed at which the heating apparatus processes the parisons, as a function of the speed of the line (for producing blow moulded containers from the parisons) where the apparatus is inserted, determined by the size of the containers, nevertheless guaranteeing optimum and uniform heating of the parisons.
  • the present invention makes available an apparatus for heating parisons of thermoplastic material, comprising:
  • a conveyor having a ring-shaped configuration and defining a path along which the parisons are fed, said path forming a closed loop;
  • a plurality of supporting elements having a structure fixed to the conveyor and a rod rotatably associated with the structure to rotate about a longitudinal axis and having a lower end that can be operatively inserted in a parison in such a way as to retain it and drive it rotationally about its longitudinal axis;
  • a linking element kinematically coupled to a rotary member rotatably associated with the structures and coupled to the rods in such a way that the rods are made to rotate about their longitudinal axes as a result of their movement as one with the conveyor;
  • a first motor connected to the conveyor, and a second motor, connected to the linking element, characterized in that it comprises control means connected to the second motor for varying the speed of the linking element as a function of the speed of the conveyor, for setting the speed at which the parisons rotate about their longitudinal axes at a predetermined value independently of the speed of the conveyor.
  • the linking element is configured as a ring, arranged in such a way that the rotary member is stably coupled to the linking element during a movement of the rotary member in said closed loop.
  • the linking element is configured as a single ring, arranged substantially in correspondence to the path along which the parisons are fed.
  • thermoplastic parison heating apparatus which is of particularly robust construction.
  • rotary member e.g. a sprinkle
  • the linking element e.g. a chain
  • FIG. 1 schematically illustrates an apparatus according to the invention in a perspective view
  • Figure 2 schematically illustrates the apparatus of Figure 1 in a plan view
  • FIG. 3 is a perspective view illustrating one of the supporting elements of Figure 1;
  • - Figure 4 illustrates the element of Figure 3 from a different angle;
  • FIG. 5 is a section view of the element of Figure 3 in a first operating position
  • Figure 7 illustrates the element of Figure 5 in a second operating position
  • FIG. 9 is an exploded view of a portion of the element of Figure 3;
  • the numeral 1 denotes an apparatus according to this invention.
  • the apparatus 1 is an apparatus for heating parisons 2 made of thermoplastic material, used to make containers by blow-moulding.
  • the apparatus 1 receives the parisons at a feed station, heats them to the required temperature (typically to a temperature greater than its glass transition temperature) and transfers them, at an outfeed station, to a blow- moulding machine using a transfer star wheel.
  • the required temperature typically to a temperature greater than its glass transition temperature
  • the apparatus 1 comprises a conveyor 3 defining a path along which the parisons 2 are fed.
  • the conveyor 3 has a ring-shaped configuration so that the path along which the parisons move forms a closed loop.
  • the conveyor 3 comprises, for example, a chain or a belt trained around wheels or pulleys driven by a motor 4.
  • the motor 4 that drives the conveyor 3 is preferably an electric motor
  • the conveyor 3 comprises a first chain 5A and a second chain 5B kinematically connected to the same motor 4.
  • first chain 5A and the second chain 5B rotate synchronously. Further, the first chain 5A and the second chain 5B are vertically spaced by a predetermined quantity.
  • the apparatus 1 also comprises a plurality of elements 6 for supporting the parisons 2, to enable the parisons 2 themselves to be moved by the conveyor 3 along the feed path.
  • Figure 1 illustrates only two of the supporting elements 6 forming part of said plurality.
  • the supporting elements 6 are connected to the conveyors and are preferably spaced uniformly along the conveyor 3.
  • Each supporting element 6 comprises a structure 7 fixed to the conveyor 3 and a rod 8 rotatably associated with the structure 7 to turn about a longitudinal axis.
  • the structure 7 is equipped with a first arm 9A fixed to the first chain 5A and a second arm 9B fixed to the second chain 5B.
  • the longitudinal axis of the rods 8 is vertical, that is to say, perpendicular to a horizontal surface that supports the apparatus 1.
  • the rod 8 is movable axially relative to the structure 7 between a lowered position, where the bottom end of the rod 8 is operatively inserted in a parison 2 in such a way as to hold it and rotate it about its longitudinal axis, and a raised position, where the parison 2 is disengaged from the rod 8.
  • the apparatus also comprises a heating tunnel 10 in which the parisons 2 move along at least a part of the feed path defined by the conveyor 3.
  • the heating tunnel 10 houses a plurality of infrared lamps, usually mounted only on the outside of the machine, towards the operator; on the opposite side there are deflectors for reflecting the rays emitted by the infrared lamps in order to optimize their effect.
  • the heating tunnel 10 constitutes means for heating the parisons 2 during their movement as one with the conveyor 3 along at least a part of the feed path it defines.
  • the apparatus 1 further comprises a linking element 11 kinematically coupled to the rods 8 in such a way that the rods 8 are made to rotate about their longitudinal axes while they move as one with conveyor 3.
  • each supporting element 6 comprises a rotary member 12 mounted rotatably on the structure 7 to rotate about the longitudinal axis of the rod 8 and interacting with the linking element 11 in such a way as to rotationally drive the rod 8 about its axis.
  • the linking element 11 is a chain and the rotary member 12 is a sprocket meshed with the chain.
  • other known systems may be used instead of the chain, such as a toothed belt, for example, designed to enable the rotary member to move along a path defined by the linking element 11 itself, while remaining coupled to (and, more specifically, meshed with) the linking element 11, causing simultaneous rotation of the rotary member 12 about its axis of rotation.
  • At least one of the supporting elements 6 comprises a friction clutch 13 connected to the rod 8 and to the rotary member 12 to define a first operating position, where the rod 8 is engaged with the rotary member 12, and a second operating position, where the rod 8 is disengaged from the rotary member 12 and can therefore rotate freely about its longitudinal axis.
  • all the supporting elements 6 comprise the friction clutch 13 connected to the rod 8 and to the rotary member 12 to define a first operating position, where the rod 8 is engaged with the rotary member 12, and a second operating position, where the rod 8 is disengaged from the rotary member 12 and can therefore rotate freely about its longitudinal axis,
  • the friction clutch 13 comprises a block 14 integral with the rod 8 and shaped to match the shape of a cavity 15 made in the rotary member 12 to form a coupling between the block 14 and a surface of the rotary member 12 facing the cavity 15.
  • the rod 8 and the rotary member 12 are coupled by a tapered clutch; the contact angle made by the tapered clutch with the longitudinal axis is preferably between 5° and 30°.
  • the tapered friction clutch is substituted by a flat friction clutch.
  • the rotary member 12 is a sprocket stably meshed with the chain 11; that is to say, all the rotary members 12 are coupled to the linking elements 11 for the full length of the feed path, without interruptions.
  • Figures 9 and 10 show how each rod 8 is equipped at a free end of it (that is, at its bottom end) with a plurality of pushers 81, preferably three in number.
  • the pushers 81 are uniformly distributed around the longitudinal axis of the rod 8.
  • the pushers 81 are housed in respective slots 82 made in the rod 8 and are designed to slide radially inside the slots 82 between a withdrawn position where the pushers 81 are at least partly located inside the slots 82 (to enable the parison 2 to be inserted) to an extracted position where a part of each pusher 81 extends outside its slot 82 more than it does when it is in the withdrawn position, thereby defining the vertices of a polygon having a circumscribed circle of predetermined diameter (at least greater than the diameter of the cavity defined by the parison 2).
  • the pushers 81 are preferably dice shaped.
  • the pushers 81 are preferably fixed to elastic arms 83.
  • the elastic arms 83 are equal in number to the number of pushers 81.
  • One end of each elastic arm 83 is fixed to the rod 8 and the other end fixed to a respective pusher 81.
  • the elastic arms 83 are designed in such a way that when in the rest position, they place the respective pushers 81 in the extracted position, and when in a flexed position (inwards towards the longitudinal axis of the rod 8), place the pushers 81 in the withdrawn position.
  • the elastic arms 83 are parallel to the axis of the rod 8.
  • the pushers, the elastic arms 83 and the slots 82 together constitute means for gripping the parisons 2.
  • the pushers 81 being connected to the elastic arms 83, are positioned in contact with an inside wall of the parison 2 without damaging it and exert pressure on it (substantially radial, from the inside out) as a result of the interference between the parison 2 and the pushers 81 in the withdrawn position or in an intermediate position between the extracted and the withdrawn position.
  • the gripping means control the movement of the parison 2.
  • the pushers 81 are moved from the extracted position to the withdrawn position as a result of the parison 2 being placed on the free end of the rod 8 and the above mentioned interference.
  • the pushers 81 preferably have a radiused or outwardly rounded surface in order to avoid damaging the parison 2.
  • all the supporting elements 6 comprise a wheel 16 kinematically connected to the rod 8 and interacting with a cam 17 (of known type and only partly illustrated in the drawings) for moving the rod 8 axially, that is to say, for moving the rod 8 from the lowered position to the raised position and vice versa.
  • each supporting element 6 comprises a sleeve 18 coaxial with the rod 8 and positioned round the outside of the latter in such a way as to cover a central portion of it.
  • the ends of the rod 8 are rotatably connected to the structure 7, while a central portion of the rod 8 is rotatably inserted in the sleeve 18.
  • the sleeve 18 is coupled to the structure 7 in such a way that it can move axially from a raised position to a lowered position and vice versa, without being able to rotate about its axis (that is, about the axis of the rod 8).
  • the wheel 16 is fixed to the sleeve 18.
  • the wheel 16 therefore moves as one with the supporting element 6 under the action of the conveyor 3 and is free to move axially thanks to interaction with the cam 17 but cannot rotate about its axis.
  • the sleeve 18 is coupled to the rod 8 by a ring 19 (illustrated in Figure 8) fixed to the rod 8 and connected to a top end of the sleeve 18 (forming a stop for the top end of the sleeve 18).
  • the ring 19 is a snap ring. It should also be noted that the ring 19 is inserted in an annular groove made in the rod 8.
  • the supporting element 6 also comprises a spring 20 which operates on the sleeve 18 in such a way as to apply on the latter an axially directed force opposing the action of the cam 17 on the wheel 16.
  • the spring 20 has a first end fixed to the structure 7 and a second end connected to the rod 8 (preferably to the bottom end of the rod 8) to apply a downwardly directed axial force on it.
  • cam 17 is set up to move the rod 8 upwards when it is at a station for releasing the pan sons 2.
  • the spring 20 has the effect of ensuring that the wheel 16 follows the cam profile, pushing the rod 8 downwards, which in turn drags the sleeve 18 and the wheel 16 downwards along with it.
  • the spring 20 is also designed to push the block 14 towards the rotary member 12, thus creating friction between the matching surfaces of block 14 and rotary member 12, in such a way that the rotary member 12 rotationally drives the block 14 and the elements engaged with it.
  • all the supporting elements 6 also preferably comprise a tubular limit stop element 21 connected to a bottom portion of the structure 7 to protrude axially downwards relative to it.
  • the limit stop element 21 is set up in such a way that when the rod 8 is in the lowered position ( Figure 4), the end portion of the rod 8 equipped with the gripping means protrudes downwardly relative to the limit stop element 21 and the parison 2 coupled to it is in contact (at an upper annular surface of it) with the limit stop element 21; and when the rod 8 is in the raised position ( Figure 5), the end portion of the rod 8 equipped with the gripping means is positioned inside the limit stop element 21 and the parison 2 is uncoupled from the rod 8.
  • the limit stop element 21 opposes the parison 2 in such a way that the latter can be removed from the conveyor 3 during exchange with the grippers of the transfer carousels; the limit stop element 21 abuts the parison, stopping its upward axial movement together with the conveyor 3 and thereby causing the conveyor 3 to be pulled off the parison.
  • the raised position of the rod 8 thus constitutes a parison releasing configuration for the respective supporting element 6.
  • the friction clutch 13 is designed to be set in the first operating position (where the rod 8 is rigidly connected to the rotary member 12 and rotates as one with it about its longitudinal axis) when the rod 8 is in the lowered position, and in the second operating position (where the rod 8 is disengaged from the rotary member 12 and can rotate freely about its longitudinal axis) when the rod is in the raised position.
  • the friction clutch 13 is designed to be set in the second operating position when the rod is in an intermediate position between the lowered and raised positions.
  • the linking element 11 is movably connected to a frame of the apparatus 1.
  • the linking element 11 preferably comprises a chain.
  • the toothed chain 11 is movably connected to the frame and is motor driven.
  • the toothed belt 11 is trained around pulleys so that it can rotate while remaining kinematically coupled to the rotary members 12 of the supporting elements 6.
  • the apparatus 1 comprises control means configured for varying the speed of the linking element 11 as a function of the speed of the conveyor 3, for setting the speed at which the parisons 2 rotate about their longitudinal axes at a predetermined value independently of the speed of the conveyor 3.
  • the apparatus 1 comprises a first motor 4, connected to the conveyor 3, and a second motor, connected to the linking element 11.
  • control means is connected to the second motor for varying the speed of the linking element 11. That means the rotation speed of the parisons 2 about their longitudinal axes is advantageously independent of the speed of the conveyor 3.
  • the speed of the conveyor 3 depends on the overall speed of the production line where the apparatus 1 is inserted, i.e. the line for producing blow moulded containers from the parisons.
  • the apparatus 1 feeds a blow moulding machine; the speed of said blow moulding machine (which varies significantly when the shape or the size of the containers to be blown is changed, e.g. by substituting single cavity moulds with double cavity moulds designed to blow two containers at the same time) determines the speed at which the apparatus 1 must supply the heated parisons 2, and thus it determines the speed of the conveyor 3.
  • the speed of said blow moulding machine (which varies significantly when the shape or the size of the containers to be blown is changed, e.g. by substituting single cavity moulds with double cavity moulds designed to blow two containers at the same time) determines the speed at which the apparatus 1 must supply the heated parisons 2, and thus it determines the speed of the conveyor 3.
  • the speed of the conveyor 3 itself effects the speed at which the parisons 2 rotate around their axes.
  • control means acts on the speed of the linking element 11, to compensate undesired variations in the speed of rotation of the parisons 2, caused by variations in the speed of the conveyors 3.
  • the motor 4 connected to the conveyor 3 constitutes said first motor and the apparatus 1 comprises said second motor (not illustrated) connected to the chain 11.
  • the second motor is preferably an electric motor.
  • the first and second motors are preferably independent of each other.
  • Said control means (for example, in the form of a suitably programmed electronic card connected to an inverter that drives the motor) are preferably connected to the second motor to control the speed at which the parisons rotate about their longitudinal axes.
  • control means are programmed to control the speed at which the parisons rotate about their longitudinal axes.
  • the apparatus preferably comprises means for regulating the speed of the second motor (embodied, for example, by the control means and the inverter that drives the second motor) which also constitute means for regulating the linear speed of the linking element 11.
  • the invention also contemplates the provision of means (embodied, for example, by the control means and the inverter that drives the second motor) for reversing the motion of the second motor.
  • the apparatus 1 enables the rotation speed of the rotary member 12, and hence of the conveyor 3, to be varied as required, even cancelling or reversing the direction of motion relative to the direction of motion due solely to the feed motion of the member 12 on the linking element 11. That means the rotation speed of the motor that controls the movement of the chain 11 is acted upon.
  • the invention offers the following advantages.
  • the apparatus 1 enables the parisons 2 to be heated uniformly and, at the same time, is particularly robust and simple in construction.
  • the apparatus 1 is particularly flexible and optimizes the way the parisons 2 are rotated about their longitudinal axes inside heating tunnel.
  • linking element 11 is motor driven.
  • linking element 11 is configured as a ring
  • each rotary member 12 (i.e. has an annular shape); it is arranged in such a way that each rotary member 12 is stably coupled to the linking element 11 during the movement of the rotary member 12 in said closed loop.
  • the linking element 11 is configured as a single ring, arranged substantially in correspondence to the path along which the parisons 2 are fed.
  • Said shape and arrangement of the linking element 11 (which allows the rotary members 12 to be always coupled thereto) is advantageous because avoids engagements and disengagements of the rotary members 12 with respect to the linking element 11, thus making the apparatus 1 more reliable and robust.
  • the presence of the friction 13 allows to avoid damaging the parisons during the coupling between the rods 3 and the corresponding parisons 2. In fact, it allows the rod 8 to be idle, while the rod 8 is inserted in the parison 2.
  • the apparatus 1 comprises supporting means (not illustrated) configured for rotating the parison 2 around its axis while it is engaged by the rotating rod 8.
  • said supporting means are configured to rotate the parison 2 at the same speed at which the rod 2 rotates.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

L'invention concerne un appareil (1) de chauffage de paraisons (2) en matériau thermoplastique, qui comprend: un transporteur (3) définissant un trajet le long duquel les paraisons (2) sont acheminées; plusieurs éléments supports (6) ayant une structure (7) fixée au transporteur (3) et une tige (8) associée rotative à la structure (7) pour une rotation autour d'un axe longitudinal, et ayant une extrémité inférieure qui peut être insérée opérationnelle dans une paraison (2) de manière à la retenir et à l'entraîner rotative autour de son axe longitudinal; un élément de liaison (11) couplé de façon cinématique à un système rotatif (12) associé rotatif aux structures (7) et couplé avec les tiges (8) de sorte que les tiges (8) soient amenées en rotation autour de leur axe longitudinal tandis qu'elles se déplacent en tant qu'unité avec le transporteur (3); un système de chauffage (10) pour chauffer les paraisons (2) à mesure que celles-ci se déplacent le long d'au moins une partie de leur trajet d'acheminement. L'élément de liaison (11) est entraîné par un moteur, ce qui permet de réguler la vitesse à laquelle les paraisons (2) tournent autour de leur axe longitudinal.
PCT/IB2010/052939 2009-06-30 2010-06-28 Appareil de chauffage de paraisons en matériau thermoplastique Ceased WO2011001358A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP10740299A EP2448744A2 (fr) 2009-06-30 2010-06-28 Appareil pour le cauffage de paraisons en matière thermoplastique

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITBO2009A000420A IT1398130B1 (it) 2009-06-30 2009-06-30 Apparato di riscaldamento di preforme in materiale termoplastico
ITBO2009A000420 2009-06-30

Publications (2)

Publication Number Publication Date
WO2011001358A2 true WO2011001358A2 (fr) 2011-01-06
WO2011001358A3 WO2011001358A3 (fr) 2011-08-25

Family

ID=41728160

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2010/052939 Ceased WO2011001358A2 (fr) 2009-06-30 2010-06-28 Appareil de chauffage de paraisons en matériau thermoplastique

Country Status (3)

Country Link
EP (1) EP2448744A2 (fr)
IT (1) IT1398130B1 (fr)
WO (1) WO2011001358A2 (fr)

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CN102145541A (zh) * 2011-01-26 2011-08-10 林明茳 链条支架调节型烘箱
CN102145538A (zh) * 2011-01-28 2011-08-10 林明茳 推动滑块式吹瓶机烘箱输送机构
FR2986453A1 (fr) * 2012-02-08 2013-08-09 Sidel Participations Organe de prehension de recipients comportant un nez demontable equipe d'un mandrin et d'un plateau d'ejection
CN103753800A (zh) * 2014-01-03 2014-04-30 浙江德玛克机械有限公司 伺服电机驱动式全自动塑料吹瓶机
WO2014135631A1 (fr) * 2013-03-07 2014-09-12 Sidel Participations Dispositif de transport d'un corps creux comportant des moyens de préhension perfectionnés
FR3027886A1 (fr) * 2014-11-03 2016-05-06 Sidel Participations "dispositif de transport de preformes dans un four de conditionnement thermique"
US9461566B2 (en) 2011-09-05 2016-10-04 Brose Fahrzeugteile Gmbh & Co. Kg, Hallstadt Drive arrangement for the motorized adjustment of an adjustment element of a motor vehicle
FR3133554A1 (fr) * 2022-03-21 2023-09-22 Sidel Participations Station de chauffage de preformes comportant un moyen de mise en rotation des preformes au-dela d'une zone de chauffage

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US5853775A (en) 1997-12-05 1998-12-29 Electra Form, Inc. Non-Round container blow molding apparatus

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102145541A (zh) * 2011-01-26 2011-08-10 林明茳 链条支架调节型烘箱
CN102145538A (zh) * 2011-01-28 2011-08-10 林明茳 推动滑块式吹瓶机烘箱输送机构
US9461566B2 (en) 2011-09-05 2016-10-04 Brose Fahrzeugteile Gmbh & Co. Kg, Hallstadt Drive arrangement for the motorized adjustment of an adjustment element of a motor vehicle
EP2626177B1 (fr) 2012-02-08 2015-05-20 Sidel Participations Organe de préhension de récipients comportant un nez démontable équipé d'un mandrin et d'un plateau d'éjection
FR2986453A1 (fr) * 2012-02-08 2013-08-09 Sidel Participations Organe de prehension de recipients comportant un nez demontable equipe d'un mandrin et d'un plateau d'ejection
EP2626177A1 (fr) * 2012-02-08 2013-08-14 Sidel Participations Organe de préhension de récipients comportant un nez démontable équipé d'un mandrin et d'un plateau d'éjection
US9067742B2 (en) 2012-02-08 2015-06-30 Sidel Participations Vessel gripping member comprising a removable nose equipped with a mandrel and an ejection plate
FR3002929A1 (fr) * 2013-03-07 2014-09-12 Sidel Participations "dispositif de transport d'un corps creux comportant des moyens de prehension perfectionnes"
WO2014135631A1 (fr) * 2013-03-07 2014-09-12 Sidel Participations Dispositif de transport d'un corps creux comportant des moyens de préhension perfectionnés
US9539755B2 (en) 2013-03-07 2017-01-10 Sidel Participations Device for transporting a hollow body comprising improved grasping means
CN103753800A (zh) * 2014-01-03 2014-04-30 浙江德玛克机械有限公司 伺服电机驱动式全自动塑料吹瓶机
FR3027886A1 (fr) * 2014-11-03 2016-05-06 Sidel Participations "dispositif de transport de preformes dans un four de conditionnement thermique"
FR3133554A1 (fr) * 2022-03-21 2023-09-22 Sidel Participations Station de chauffage de preformes comportant un moyen de mise en rotation des preformes au-dela d'une zone de chauffage
EP4249212A1 (fr) * 2022-03-21 2023-09-27 Sidel Participations Station de chauffage de preformes comportant un moyen de mise en rotation des preformes au-dela d'une zone de chauffage

Also Published As

Publication number Publication date
EP2448744A2 (fr) 2012-05-09
ITBO20090420A1 (it) 2011-01-01
IT1398130B1 (it) 2013-02-14
WO2011001358A3 (fr) 2011-08-25

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