EP1345750A1 - Procede et dispositif pour mouler des recipients par soufflage - Google Patents

Procede et dispositif pour mouler des recipients par soufflage

Info

Publication number
EP1345750A1
EP1345750A1 EP01982139A EP01982139A EP1345750A1 EP 1345750 A1 EP1345750 A1 EP 1345750A1 EP 01982139 A EP01982139 A EP 01982139A EP 01982139 A EP01982139 A EP 01982139A EP 1345750 A1 EP1345750 A1 EP 1345750A1
Authority
EP
European Patent Office
Prior art keywords
preforms
distance
module
transport
blowing
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.)
Withdrawn
Application number
EP01982139A
Other languages
German (de)
English (en)
Inventor
Dirk Wehrens
Stefan Bock
Michael Müller
Rudolf Maier
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.)
SIG Blowtec GmbH and Co KG
Original Assignee
SIG Blowtec GmbH and Co KG
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 SIG Blowtec GmbH and Co KG filed Critical SIG Blowtec GmbH and Co KG
Publication of EP1345750A1 publication Critical patent/EP1345750A1/fr
Withdrawn legal-status Critical Current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
    • 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
    • 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
    • B29C49/28—Blow-moulding apparatus
    • B29C49/28008—Blow-moulding apparatus mounting, exchanging or centering machine parts, e.g. modular parts
    • 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
    • B29C49/42113—Means for manipulating the objects' position or orientation
    • B29C49/42121—Changing the center-center distance
    • B29C49/42122—Adapting to blow-mould cavity center-center distance
    • 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
    • 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
    • B29C49/56—Opening, closing or clamping means
    • 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
    • B29C49/28—Blow-moulding apparatus
    • 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
    • B29C49/56—Opening, closing or clamping means
    • B29C49/5601—Mechanically operated, i.e. closing or opening of the mould parts is done by mechanic means
    • B29C49/5603—Mechanically operated, i.e. closing or opening of the mould parts is done by mechanic means using toggle mechanism
    • 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
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2067/00—Use of polyesters or derivatives thereof, as moulding material

Definitions

  • the invention relates to a method for blow molding containers made of a thermoplastic material, in which preforms are produced by an injection molding module and transferred to a blow module after they have been removed from the mold, and in which the preforms can be positioned in the region of the blow module by holding elements which can be positioned along a closed circulation route are transported.
  • the invention also relates to a device for blow molding containers made of a thermoplastic material, which has an injection molding module for the production of preforms, a blowing module for converting the preforms into containers and a transfer device connecting the injection molding module and the blowing module.
  • a device for blow molding containers made of a thermoplastic material which has an injection molding module for the production of preforms, a blowing module for converting the preforms into containers and a transfer device connecting the injection molding module and the blowing module.
  • Such devices are used to convert preforms made of a thermoplastic material, for example preforms made of PET (polyethylene terephthalate), into containers.
  • a blowing module has a heating device and a blowing device, in the area of which the pre-tempered preform is expanded into a container by biaxial orientation. The expansion takes place with the aid of compressed air which is introduced into the preform to be expanded.
  • the procedural sequence for such an expansion of the preform is explained in DE-OS 43 40 291.
  • the preforms and the blown containers can be transported within the blowing module with the aid of different handling devices.
  • transport mandrels onto which the preforms are attached is known.
  • the moldings can also be handled with other support devices.
  • gripping tongs for handling preforms is described, for example, in FR-OS 27 20 679.
  • An expanding mandrel that can be inserted into a mouth area of the preform for holding purposes is explained in WO 95 33 616.
  • the preforms with their longitudinal axes should be arranged as close as possible to one another in the injection molding process and that, as a rule, a greater distance between the longitudinal axes is required in the case of blow molding to containers in order to provide sufficient space for them relative to the To provide preforms with larger containers. This requirement occurs in particular when two or more preforms are inflated into containers at the same time.
  • the object of the present invention is to improve a method of the type mentioned in the introduction in such a way that expanded possibilities for arranging the preforms are provided.
  • mounting elements each have a preform transport and that the support elements along the circumferential path take at least two different distances relative to each other.
  • Another object of the present invention is to construct a device of the type mentioned in the introduction in such a way that improved possibilities for handling the preforms are provided.
  • each mounting element is designed to position a preform, that at least one distance modifier for changing the distance of the mounting elements relative to one another is arranged in the area of the circulation path and that the mounting elements in the area of the transfer devices are relatively closer than each other are arranged in the area of the blowing station.
  • the distance modifier makes it possible to change the distances locally where it is expedient due to the respective process sequence. In this way, it can be ensured in particular that the preforms are arranged as compactly as possible in the area of their injection molding manufacture and in the area of their temperature conditioning, and that an increased distance is achieved in the area of blow molding for adaptation to the intended container geometry.
  • the mounting elements take up a smaller distance in the area of a temperature control section relative to a maximum distance.
  • a space-saving transfer of the preforms from the injection molding module to the blow module is supported in that the mounting elements are at a smaller distance from a transfer device in relation to a maximum distance.
  • the holding elements take up a greater distance in the area of a blowing station relative to a minimal distance.
  • the distance between the holding elements is increased in a continuous and / or clocked manner relative to one another in the transport direction upstream of the blowing station.
  • a mechanically simple and at the same time robust change in distance can be achieved in that a change in distance of the mounting elements is relative to each other using a rotating spiral profile.
  • the spacing of the mounting elements relative to one another is carried out using at least one slide.
  • the preforms be transferred from the injection molding module to the blowing module with a material temperature above a surrounding room temperature.
  • a mechanical simplification by avoiding turning devices is achieved in that the preforms are transported with their mouths pointing upwards in a vertical direction at least along part of the circulation path.
  • At least two, usually several, preforms are simultaneously formed into containers in the area of the blowing station.
  • cavities for production the preforms are arranged in the injection mold with their longitudinal axes relative to one another with a smaller distance than the longitudinal axes of cavities of the blow molding station for producing the containers.
  • a simple implementation in terms of production technology can be achieved in that the spiral-like profile is formed by a groove which extends along a shaft.
  • spiral profile is formed by a web which extends along a shaft.
  • a relatively simple geometry of the distance modifier can be provided in that the spiral-like profile extends essentially with a constant slope in the direction of the circulation path.
  • the spiral profile extends with a varying slope in the direction of the circulation route.
  • a favorable effect of gravity when carrying out the injection molding process can be achieved in that an injection mold of the injection molding module has cavities open upwards in the vertical direction.
  • the blowing station has cavities which are open in the vertical direction.
  • Carrying out the material transport while avoiding turning devices is achieved in that the holding elements are designed for transporting the preforms with the mouth regions facing upwards in the vertical direction.
  • a mechanically simple construction transfer device is provided in that the transfer device has a support element for the preforms, which is provided with transport recesses.
  • a simple structure of the transfer device is also supported in that the transfer device for handling the preforms is designed with mouth regions facing upwards in the vertical direction.
  • the transfer device has a guide for an essentially horizontally oriented positioning.
  • the transfer device have an adjusting device for an essentially vertical positioning.
  • at least one buffer is arranged in the area of the transfer device.
  • the orbit of the mounting elements can be defined in that the mounting elements are guided by at least one rail.
  • Circulation of the mounting elements can take place, for example, in that the mounting elements are conveyed by a transport wheel at least in regions along the circulation path.
  • the support elements along the circulation path are at least partially conveyed by a spiral transport element.
  • holding elements are conveyed at least in regions along the circulation path by a transport slide.
  • FIG. 1 is a schematic diagram of a top view of a device for container formation using the one-step process
  • FIG. 2 shows a basic illustration of a side view of a transfer device which is arranged between an injection molding module and a blowing module
  • 3 shows a side view of a blowing station in which preforms are inflated with their mouths pointing upwards into containers
  • FIG. 4 shows a basic illustration of a circulation path of holding elements in the area of the blow module using a spiral-like separating element
  • FIG. 5 is an enlarged view of the separating element according to FIG. 4,
  • FIG. 10 is a plan view in the viewing direction X in FIG. 9,
  • 11 shows the device in FIG. 9 according to section line XI-XI
  • 12 shows the arrangement according to FIG. 9 after an opening operation of the blowing station has been carried out
  • FIG. 15 shows a device for FIG. 14 when using a transport slide
  • 16 is a schematic representation of a blow mold arrangement for the simultaneous production of two containers
  • 17 is a schematic representation of a blow molding arrangement for the simultaneous production of three containers.
  • FIG. 1 shows schematically an injection molding module (1) and a blowing module (2), which are connected to each other by a transfer device (3).
  • the injection molding module (1) is equipped with an extruder (4) and an injection mold (5), in the area of which a plurality of cavities (6) for the production of preforms (7), not shown in FIG. 1, are arranged.
  • the blow module (2) is provided with a plurality of holding elements (8) which can be transported along a closed circulation path (9).
  • the holding elements (8) are fed to a blowing station (10), in the area of which the preforms (7) are deformed relative to one another into containers (11), not shown.
  • a distance from the longitudinal axes (12) of the preforms (7) relative to one another is greater in the area of the blowing station (10) than in at least one other area of the circulation path (9).
  • a distance between the holding elements (8) is changed relative to one another.
  • This change in distance can take place with the aid of a distance modifier (13) which, according to the embodiment in FIG. 1, is provided with a spiral-like profile (14).
  • the spiral-like profile (14) is designed as a groove in a shaft (15) which is connected to a drive (16) for specifying a rotational movement.
  • the drive (16) can be coupled to the shaft (15) via a gear (17).
  • the holding elements (8) are advantageously provided with guide elements (18) which engage in the profile (14).
  • the guide elements (18) can be formed, for example, from laterally projecting bolts which carry cam rollers (19).
  • the combination of the injection molding module (1), the blowing module (2) and the transfer device (3) provides a so-called one-step device for blow molding containers (11), in which the preforms (7) from the injection molding module (1) to the blowing module (2) transferred at a temperature that is above the ambient temperature. It is therefore not necessary in the area of the blowing module to heat the preforms (7) from an ambient temperature to the blowing temperature, but in the area of a temperature control section (20) only needs a suitable temperature modification or
  • the temperature control section (20) has heating devices (21) which can be equipped, for example, with infrared radiators.
  • heating devices (21) which can be equipped, for example, with infrared radiators.
  • reflectors (22) are used.
  • the reflectors (22) have a reflector profile (23) which is adapted to the external design of the preforms (7).
  • the reflectors (22) can be positioned transversely to the circulation path (9) in order to support the closest possible arrangement on the preforms (7).
  • the support elements (8) are transported along the circulation route (9) in cycles with successive standstill phases and transport phases.
  • the function of the transfer device (3), the positioning of the reflectors (22) and the rotational movement of the distance modifier (13) are adapted to the respective movement cycle.
  • a transport of the mounting elements (8) along the circulation path (9) can be done, for example, with a driven one Transport wheels (24) take place, which has a profile (25) for loading the mounting elements (8) and is preferably arranged in the region of a deflection of the circulation path (9).
  • the cycle operation of the blow module (2) is controlled in such a way that a larger number of preforms (7) can be produced in the area of the injection molding module (1) than are subsequently simultaneously formed into containers (11) in the area of the blow module (2).
  • the idea is to produce ten preforms (7) simultaneously in the area of the injection molding module (1) and to produce two containers (11) in the area of the blowing station (10) at the same time.
  • Another variant consists in producing five preforms (7) simultaneously in the area of the injection molding module (1) and simultaneously producing a container (11) in the area of the blowing station (10).
  • Fig. 2 illustrates in a side view the structure of the transfer device (3).
  • the injection mold (5) is formed from a cavity block (26) and from injection mold cores (27) which can be positioned relative to the cavity block (26) by a lifting device (28).
  • the preforms (7) are raised together with the injection molding cores (27) and a support element (29) of the transfer device (2) can be moved into the area of the injection molding module (1) retract.
  • the supporting element (29) is operated by an adjusting device
  • the mounting elements (8) are guided along the circulation path (9) by rails (34).
  • a connecting piston (35) can be lowered, through which a pressurized medium for expanding the preforms (7) can be passed through the holding element (8) into the preforms (7).
  • Fig. 3 shows a side view of the blowing station (10).
  • the blow station (10) is provided with mold carriers (36, 37), which each hold blow mold segments (38, 39).
  • the mold carriers (36, 37) can be adjusted together with the blow mold segments (38, 39) transversely to the circulation path (9) in order to be able to carry out opening and closing movements.
  • the positioning of the mold carriers (36, 37) takes place in the illustrated embodiment with the aid of Swing levers (40) which are pivotably mounted in the area of a base plate (41).
  • the pivot levers (40) have main bearings (42) for connection to the base plate (41).
  • a connection to the mold carriers (36, 37) takes place via swivel joints (43), a connection to a positioning element (44) takes place via swivel joints (45).
  • the positioning element (44) is adjustable in the vertical direction along a guide (46). The adjustment can take place, for example, with the aid of a threaded rod (47) which is set in rotation by a drive (48).
  • a threaded rod (47) which is set in rotation by a drive (48).
  • a lifting device (49) is used for positioning the connecting piston (35), which has a drive (50).
  • the lifting device (49) has guide elements (51) for a transport carriage (52) which holds the connecting piston (35).
  • the adjustment movement can be transmitted, for example, via a drive belt (53).
  • Fig. 4 shows the course of the circulation path (9) in more detail in the area of the blow module (2).
  • the circulation path (9) is designed similarly to a rectangle with rounded sides which are transferred into one another.
  • the transmission (17) for the distance modifier (13) also drives one or more transport wheels (24).
  • three transport wheels (24) are actively driven, the transport wheels (24) being coupled to one another and to the transmission (17) via circumferential belts (54).
  • the support elements (8) are preferably aligned during transport along the circulation path (9) in such a way that the guide elements (18) always point outwards. From the illustration in FIG. 4 it can be seen in particular that the holding elements (8) are arranged as closely as possible relative to one another along the predominant part of the circulation path (9). The distance is increased only in the vicinity of the blowing station (10).
  • Fig. 5 shows an enlarged view of the interaction of the distance modifier (13) with the transport wheels (24).
  • all transport wheels (24) are coupled to one another via belts (54).
  • the circumferential course of the transport wheels (24) results in a first widening of the spacing of the holding elements (8) relative to one another.
  • the course of the spiral-like profile (14) of the distance modifier (13) with the assigned speed of the shaft (15) and the speed of the transport wheel (24) is such voted that the. Bracket elements (8) from the transport wheel (24) to the distance modifier (13) can be transferred.
  • the profile (14) in the inlet area is provided with a corresponding widening.
  • the speed of the shaft (15) is set such that the required spacing of the mounting elements (8) results relative to one another.
  • three preforms (7) are simultaneously inflated into containers (11) in the area of the blowing station (10).
  • Fig. 6 shows a modified embodiment of the distance modifier (13).
  • the spiral profile (14) has different designs along its course. To facilitate transfer of the holding elements (8) from the transport wheel (24) to the distance modifier (13), the profile (14) initially runs relatively flat in the transfer area, so that the holding elements (8) still move in the first area of their movement through the distance modifier (13) are arranged relatively close to each other. The slope of the profile (14) then increases along the course of the shaft (15), so that in the area of the blowing station (14) the required distance and the holding elements (8) are present relative to one another. The thread pitch then decreases again in the transport direction behind the blowing station (10), so that, when the holding elements (8) are transferred from the distance modifier (13) to the following transport wheel (24), a tight one again Arrangement of the support elements (8) is realized relative to each other.
  • Fig. 7 shows a further modified embodiment of the distance modifier (13).
  • the spiral profile (14) is here equipped with a wider spiral path, so that the holder elements (8) can be inserted directly into the profile (14). This avoids the separate guide elements (18) with cam rollers (19), which contributes to a simplified structure of the mounting elements (8).
  • a corresponding direct action on the holding elements (8) by the profile (14) can be implemented both in the implementation shown in FIG. 7 with a different gradient of the profile (14) and in one embodiment with a constant profile gradient along the shaft (15) ,
  • the profile (14) is formed from a plurality of individual profiles nested in one another in order to carry out the required modification of the spacing of the mounting elements (8).
  • FIG. 8 shows a further embodiment for implementing the transfer device (3).
  • the support element (29) with the transport recesses (30) is not transported here by the guide (33) into the area of the mounting elements (8).
  • lowering takes place first with the aid of the adjusting device (32) and insertion of the preforms (7) into a first one Buffer (55) which has receiving cavities (56) for the preforms (7).
  • a transfer element (57) is positioned above the first intermediate store (55) and lowered in such a way that the preforms (7) have.
  • a transfer element (57) of the first intermediate store (55) is positioned and lowered in such a way that the preforms (7) are acted upon by fixing elements (58) which act on the Transfer element (57) are attached.
  • the transfer element (57) is then raised by a lifting device (59), so that the preforms (7) are removed from the first intermediate store (55) again.
  • the preforms (7) are deposited by the fixing elements (58) in the region of a second intermediate store (55).
  • the device (59) is then lifted again and the transfer element (57) is moved again in order to be able to take up further preforms (7) from the intermediate store (55).
  • second fixing elements (58) which are also attached to the transfer element (57)
  • the second fixing elements (61) remove the second preforms (7) accommodated in the second intermediate store (60) in the area of a third intermediate store (62).
  • the third buffer (62) is arranged in the region of a lifting device (63) which transports the preforms (7) to the holding elements (8).
  • the third buffer store (62) is raised after the transfer element (57) has been displaced in such a way that the required space for movement is provided for the lifting device (63).
  • FIG. 9 shows the blowing station (10) in a more detailed representation.
  • the mold carriers (36, 37) are shown in the closed position of the blow station (10), but with the blow mold segments (38, 39) removed.
  • the swivel joint (53) is coupled to the respectively assigned mold carrier (36, 37) via an intermediate lever (64).
  • the swivel joint (45) is also connected to the positioning element (44) via an intermediate lever (65).
  • Mold carrier (36,37) an adjusting device (68) positioned for a bottom shape, not shown.
  • the intermediate levers (64) are connected to the respective mold carriers (36, 37) via joints (69).
  • the intermediate levers (65) are connected to the positioning element (44) via joints (70).
  • the arrangement of the adjusting device (68) for positioning the base shape can be seen in particular from the top view in FIG. 10.
  • the blowing station (10) has an essentially symmetrical design relative to the circulation path (9).
  • Fig. 11 shows a vertical section through the
  • Positioning element (44) is guided along columns (71). It can also be seen that for the simultaneous
  • Actuators (68) are used for positioning respectively assigned floor shapes.
  • FIG. 12 shows the blowing station (10) according to FIG. 9 in an open positioning of the mold carriers (36, 37).
  • the inclined positioning of the swivel levers (40) and the corresponding inclined arrangement of the intermediate levers (64, 65) can be seen.
  • the opening movement was caused by a lifting of the positioning element (40), which in turn was caused by a rotation of the threaded rod (47).
  • the setting device (68) for the base molds was lowered.
  • the holding elements (8) can thus remove the finished blown containers (11) from the area of the blowing station (10) in a next movement cycle.
  • Fig. 13 shows the mounting element (8) in detail in a vertical section.
  • the holding element (8) is provided with a base body (72) which has a profile (73) for connection to the rails (34).
  • the base body (72) carries a product attachment (74), the geometry of which is adapted to the preforms (7) to be transported.
  • a feed core (75) extends through the base body (72) into the area of the product attachment (74), through which the pressurized fluid is fed to expand the preforms (7) and is discharged again after the container has been formed.
  • a modification consists in specifying a circular path (9) instead of the essentially rectangular circular path (9) according to FIG. 1, which is similar to a triangle with rounded transitions between the respective sides.
  • Another and independent of the first modification the second modification is to use spiral-like transport elements (77), which are similar to the distance modifier (13), instead of using transport wheels (24) with profiles (25) for transporting the mounting elements (8) along the circulation path (9).
  • the transport elements (77) likewise have a profile (78), the slope of which is selected such that the mounting elements (8) are conveyed with the smallest possible distance relative to one another.
  • the profile profile in the area of the distance modifier (13) also takes place in this embodiment in such a way that both in the area of the blowing station (10) and in a subsequent delivery area in which the blown containers (11) are removed from the holding elements (8) sufficient spacing of the mounting elements (8) relative to one another is ensured.
  • FIG. 14 shows the use of two transport elements (77), which are arranged on mutually facing sides of the circulation path (9) and offset relative to one another in the direction of circulation. In principle, however, the use of a transport element (77) is sufficient.
  • the holding elements (8) are shifted in cycles.
  • temperature conditioning of the preforms (7) can be supported by a blower (79).
  • Fig. 16 shows a vertical section through a blowing station (10), which is designed for the simultaneous formation of two containers (11).
  • Fig. 17 shows a blowing station (11), which is designed for the simultaneous production of three containers (11).
  • the design of the distance modifier (13) and the respective transport cycle are suitably adapted to the number of cavities in the blowing station (10).
  • the cavities (6) are positioned spatially in such a way that the preforms (7) are manufactured with their mouths pointing upwards using injection molding technology.
  • the preforms (7) and the containers (11) are completely dispensed with. This leads to a relatively simple mechanical construction, avoids complex turning or turning devices and also avoids the risk of deformation of the heated Preforms (7) or containers (11) due to the effects of gravity during any turning operations.
  • the holding elements (8) are inserted in the vertical direction from above into the mouth area of the preforms (7) or, according to a likewise conceivable embodiment, enclose the mouth area of the preforms (7) on the outside.
  • the spatial orientation of the preforms (7) during the expansion to the containers (11) with the mouth areas upwards has the additional advantage that the cooling of the air due to the decompression takes place when the blown air is discharged from the blown container (11) Additional bottom cooling of the containers can be used, since the cool air inside the containers (11) sinks.
  • the finished blown containers (11) are removed from the holding elements (8) in the transport direction behind the blowing station (10) and fed to an output device in order to enable subsequent filling or storage of the containers (11).

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)

Abstract

L'invention concerne un procédé et un dispositif servant à mouler par soufflage des récipients à partir d'une matière thermoplastique. Dans un premier temps, des ébauches sont produites par un module de moulage par injection (1) et sont transférées à un module de soufflage (2) après démoulage. Dans la zone du module de soufflage (2), les ébauches sont positionnées par des éléments de fixation (8) qui peuvent être transportés le long d'une voie périphérique fermée. Lesdits éléments de fixation (8) transportent dans chaque cas une ébauche (7) et adoptent le long de la voie périphérique (9) au moins deux différents écarts les uns par rapport aux autres. L'écart mutuel des éléments de fixation est modulé par un modificateur d'écart (13), de sorte que lesdits éléments de fixation (8) présentent, dans la zone d'un dispositif de transfert (3) disposé entre le module de moulage par injection (1) et le module de soufflage (2), un écart mutuel relativement moindre que dans la zone d'un poste de soufflage (10) du module de soufflage (2).
EP01982139A 2000-12-28 2001-09-22 Procede et dispositif pour mouler des recipients par soufflage Withdrawn EP1345750A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10065547A DE10065547A1 (de) 2000-12-28 2000-12-28 Verfahren und Vorrichtung zur Blasformung von Behältern
DE10065547 2000-12-28
PCT/DE2001/003684 WO2002053350A1 (fr) 2000-12-28 2001-09-22 Procede et dispositif pour mouler des recipients par soufflage

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EP1345750A1 true EP1345750A1 (fr) 2003-09-24

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WO (1) WO2002053350A1 (fr)

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US7632089B2 (en) 2004-05-07 2009-12-15 Graham Packaging Pet Technologies, Inc. Take out and cooling system and method
ITBO20040328A1 (it) 2004-05-21 2004-08-21 Automa Spa Dispositivo di azionamento di stampi
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IT1396467B1 (it) * 2008-07-29 2012-12-14 Sacmi Impianto per il soffiaggio di contenitori di plastica, in particolare bottiglie
DE102008042543B4 (de) * 2008-10-01 2013-12-19 Chumpower Machinery Corp. Abstandseinstellvorrichtung für eine Blasformmaschine
DE102010064545B8 (de) * 2010-05-20 2015-10-01 Krones Aktiengesellschaft Heizstrecke zur erwärmung von vorformlingen sowie verfahren zum transportieren von vorformlingen durch eine heizstrecke
EP2626189B1 (fr) * 2010-10-08 2017-02-22 Nissei Asb Machine Co., Ltd. Dispositif et procédé de moulage par soufflage
CN103737899B (zh) * 2013-12-20 2016-02-03 徐光中 单轨道高效自动吹瓶机
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DE10065547A1 (de) 2002-07-04

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