WO2007033631A2 - Procede et dispositif pour le moulage par soufflage de contenants - Google Patents

Procede et dispositif pour le moulage par soufflage de contenants Download PDF

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Publication number
WO2007033631A2
WO2007033631A2 PCT/DE2006/001264 DE2006001264W WO2007033631A2 WO 2007033631 A2 WO2007033631 A2 WO 2007033631A2 DE 2006001264 W DE2006001264 W DE 2006001264W WO 2007033631 A2 WO2007033631 A2 WO 2007033631A2
Authority
WO
WIPO (PCT)
Prior art keywords
along
stretch rod
pickup
cam
preform
Prior art date
Application number
PCT/DE2006/001264
Other languages
German (de)
English (en)
Other versions
WO2007033631A3 (fr
Inventor
Martin Gerhards
Michael Linke
Michael Litzenberg
Frank Lewin
Rolf Baumgarte
Original Assignee
Sig Technology Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sig Technology Ltd. filed Critical Sig Technology Ltd.
Priority to DE112006003249.6T priority Critical patent/DE112006003249B4/de
Publication of WO2007033631A2 publication Critical patent/WO2007033631A2/fr
Publication of WO2007033631A3 publication Critical patent/WO2007033631A3/fr

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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
    • B29C49/08—Biaxial stretching during blow-moulding
    • B29C49/10—Biaxial stretching during blow-moulding using mechanical means for prestretching
    • B29C49/12—Stretching rods
    • 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
    • B29C49/48—Moulds
    • B29C2049/4879—Moulds characterised by mould configurations
    • B29C2049/4887—Mould halves consisting of an independent neck and main part
    • 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
    • B29C49/783—Measuring, controlling or regulating blowing pressure
    • B29C2049/7831—Measuring, controlling or regulating blowing pressure characterised by pressure values or ranges
    • 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
    • B29C49/783—Measuring, controlling or regulating blowing pressure
    • B29C2049/7832—Blowing with two or more pressure levels
    • 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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/20—Opening, closing or clamping
    • B29C33/26—Opening, closing or clamping by pivotal movement
    • 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
    • B29C49/08—Biaxial stretching during blow-moulding
    • B29C49/10—Biaxial stretching during blow-moulding using mechanical means for prestretching
    • B29C49/122—Drive means therefor
    • B29C49/1222—Pneumatic
    • 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
    • B29C49/08—Biaxial stretching during blow-moulding
    • B29C49/10—Biaxial stretching during blow-moulding using mechanical means for prestretching
    • B29C49/122—Drive means therefor
    • B29C49/1224—Hydraulic
    • 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
    • B29C49/08—Biaxial stretching during blow-moulding
    • B29C49/10—Biaxial stretching during blow-moulding using mechanical means for prestretching
    • B29C49/122—Drive means therefor
    • B29C49/1229—Drive means therefor being a cam 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
    • B29C49/08—Biaxial stretching during blow-moulding
    • B29C49/10—Biaxial stretching during blow-moulding using mechanical means for prestretching
    • B29C49/122—Drive means therefor
    • B29C49/123—Electric drives, e.g. linear motors
    • 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
    • B29C49/08—Biaxial stretching during blow-moulding
    • B29C49/16—Biaxial stretching during blow-moulding using pressure difference for pre-stretching, e.g. pre-blowing
    • 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
    • B29C49/30—Blow-moulding apparatus having movable moulds or mould parts
    • B29C49/36—Blow-moulding apparatus having movable moulds or mould parts rotatable about one axis
    • 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
    • B29C49/42075—Grippers with pivoting clamps
    • 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
    • B29C49/6409—Thermal conditioning of preforms
    • B29C49/6418—Heating of preforms
    • 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
    • B29C49/6855—Cooling of heating means, e.g. avoiding overheating
    • 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
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/10—Polymers of propylene
    • B29K2023/12—PP, i.e. polypropylene
    • 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 of containers, in which a preform is stretched from a thermoplastic material after thermal conditioning within a blow mold of a stretching rod and formed by blowing pressure into the container.
  • the invention further relates to a device for blow-molding containers made of a thermoplastic material which has at least one blowing station provided with a blow mold and which is provided with a stretching device, in the region of which a stretching rod is arranged for loading a preform which can be inserted into the blow mold and at the stretching rod is coupled to a lifting control for carrying out a movement coordination of the stretching rod.
  • a device for blow-molding containers made of a thermoplastic material which has at least one blowing station provided with a blow mold and which is provided with a stretching device, in the region of which a stretching rod is arranged for loading a preform which can be inserted into the blow mold and at the stretching rod is coupled to a lifting control for carrying out a movement coordination of the stretching rod.
  • preforms made of a thermoplastic material for example preforms made of PET (polyethylene terephthalate)
  • PET polyethylene terephthalate
  • such a blow molding machine has a heating device and a blowing device, in the region of which the previously tempered preform is expanded by biaxial orientation to form a container.
  • the expansion takes place with the aid of compressed air, which is introduced into the preform to be expanded.
  • the procedural sequence in such an expansion of the preform is explained in DE-OS 43 40 291.
  • the introductory mentioned introduction of the pressurized gas also includes the introduction of compressed gas into the developing container bubble and the introduction of compressed gas into the preform at the beginning of the blowing process.
  • the preforms as well as the blown containers can be transported by means of different handling devices.
  • the use of transport mandrels, onto which the preforms are plugged, has proven to be useful.
  • the preforms can also be handled with other support devices.
  • the use of gripping tongs for handling preforms and the use of expanding mandrels for insertion into a mouth region of the preform. are also among the available constructions.
  • a handling of containers using transfer wheels is described, for example, in DE-OS 199 06 438 in an arrangement of the transfer wheel between a blowing wheel and a Ausgabeh.
  • the execution of the motion coordination of the stretch rod can be done according to different principles. It is known, for example, the stretch rod using cam rollers guided along cam tracks. A particularly high accuracy and reproducibility of the stretching process can be realized in such curve controls when the cam rollers are guided on two sides and thereby follow a precisely defined path.
  • curve controls have the disadvantage that heavy and spatially large-sized curved paths must be used, which are usually made of steel. A conversion of the stretching system to perform modified stretching movements causes a lot of effort.
  • Linear motors of the required power are currently still very expensive and also take up a large amount of space.
  • the object of the present invention is therefore to provide a method of the type mentioned in the introduction such that an easily adaptable, inexpensive and at the same time lightweight control device for the stretching system is provided.
  • This object is achieved in that a specification of the positioning of the stretch rod is performed using a cam control in which a coupled to the stretch rod cam roller is guided along both sides along a curved path along only a portion of a carrying out a lifting movement of the stretch rod.
  • Another object of the present invention is to design a device of the aforementioned type such that a compact and at the same time easily adaptable stretch bar control is provided.
  • stretch rod is coupled to a cam control having a connected to the stretch rod cam roller, which is guided only along a portion of a control path on both sides along a curved path.
  • the weight of the cam control is significantly reduced.
  • the cam control can be manufactured more cheaply and assembled and disassembled faster.
  • the local localization of the two Side guidance of the cam roller along the intended control path such that in the range of particularly large expected stretching forces or in the range of large expected changes in the stretching forces the mutual positive guidance of the cam roller is guaranteed.
  • a particularly critical phase of the stretching operation is controlled by guiding the taker on both sides after contact of the stretching rod with a bottom of the preform.
  • the dimensioning of the cams can be reduced by the fact that the customer is guided on both sides after contact of the stretch rod with the bottom of the preform a maximum of 50 percent of the subsequent stretching path.
  • An extremely compact cam control is provided by the fact that the customer is guided on both sides after contact of the stretch rod with the bottom of the preform a maximum of 30 percent of the subsequent stretching path.
  • the customer is guided on both sides after contact of the stretch rod with the bottom of the preform maximum along 20 mm of the subsequent stretching path.
  • Small dimensioned control cams can also be provided by the fact that the customer is guided on both sides after contact of the stretch rod with the bottom of the preform maximum along 10 mm of the subsequent stretching path.
  • a defined guide in the inlet region of the pickup in the curved path is supported by the fact that the adapter is guided on both sides before contact of the stretch rod with the bottom of the preform along a lead region.
  • the section provided for the two-sided guidance of the pickup be displaceably arranged along the curved path.
  • a combination of different drive systems takes place in that the stretching rod is pneumatically positioned in addition to the positioning by the customer.
  • the stretch rod is positioned electrically in addition to the positioning by the customer.
  • the stretch rod is hydraulically positioned in addition to positioning by the taker.
  • a simple mechanical realization can take place in that the customer is guided by at least one cam roller along the curved path.
  • a compact device structure is supported by the fact that the customer is guided by a direct contact between the cam roller and the cam track.
  • the customer is positioned by an indirect roller guide along the curved path.
  • the customer is positioned by at least two cam rollers along the cam track.
  • a compact and easy to assemble device construction is achieved in that the customer is positioned by at least two superimposed cam rollers along the curved path.
  • an additional non-mechanical positioning device for the stretch rod is designed to be switched off.
  • FIG. 1 is a perspective view of a blow molding station for the production of containers from preforms
  • FIG. 2 shows a longitudinal section through a blow mold, in which a preform is stretched and expanded
  • 3 shows a sketch to illustrate a basic structure of a device for blow molding containers
  • FIG. 5 is a side view of a blowing station in which a stretch rod is positioned by a stretch rod carrier
  • FIG. 6 is a side view of a stretching system with partially guided on two sides cam rollers
  • FIG. 7 is a side view according to the viewing direction VII in Fig. 6,
  • FIG. 8 is a side view according to the viewing direction VIII in Fig. 6,
  • FIG. 10 is a plan view according to the viewing direction X in Fig. 6 and
  • FIG. 11 is a cross section along section line XI-XI in Fig. 6th
  • FIG. 1 The basic structure of a device for forming preforms (1) in container (2) is shown in FIG. 1 and in FIG. 2.
  • the device for forming the container (2) consists essentially of a blowing station (3), which is connected to a ner blow mold (4) is provided, in which a preform (1) can be inserted.
  • the preform (1) may be an injection-molded part of polyethylene terephthalate.
  • the blow mold (4) consists of mold halves (5, 6) and a bottom part (7) which is driven by a lifting device (8) is positionable.
  • the preform (1) can be held in the region of the blowing station (3) by a transport mandrel (9) which, together with the preform (1), passes through a plurality of treatment stations within the device. But it is also possible to use the preform (1), for example via pliers or other handling means directly into the blow mold (4).
  • a connecting piston (10) is arranged, which feeds the preform (1) compressed air and at the same time makes a seal relative to the transport mandrel (9).
  • a connecting piston (10) is arranged, which feeds the preform (1) compressed air and at the same time makes a seal relative to the transport mandrel (9).
  • a stretching of the preform (1) takes place in this embodiment by means of a stretching rod (11), which is positioned by a cylinder (12).
  • a mechanical positioning of the stretch rod (11) is carried out over curve segments, which are acted upon by Abgriff rollers.
  • the use of curve segments is particularly useful when a plurality of blowing stations (3) are arranged on a rotating blowing wheel
  • the stretching system is designed such that a tandem arrangement of two cylinders (12) is provided. From a primary cylinder (13), the stretch rod (11) is first moved to the area of a bottom (14) of the preform (1) before the beginning of the actual stretching operation.
  • the primary cylinder (13) with extended stretching rod together with a carriage (15) carrying the primary cylinder (13) is positioned by a secondary cylinder (16) or via a cam control.
  • a current stretching position is predetermined by a guide roller (17) which slides along a curved path during the execution of the stretching operation.
  • the guide roller (17) is pressed by the secondary cylinder (16) against the guideway.
  • the carriage (15) slides along two guide elements (18).
  • the carriers (19, 20) are locked relative to one another by means of a locking device (20).
  • Fig. 2 shows in addition to the blown container (2) and dashed lines drawn the preform (1) and schematically a developing container bladder (23).
  • Fig. 3 shows the basic structure of a blow molding machine, which is provided with a heating section (24) and a rotating blowing wheel (25).
  • a preform input (26) the preforms (1) are transported by transfer wheels (27, 28, 29) into the region of the heating path (24).
  • Heater (30) and fan (31) are arranged along the heating path (24) in order to temper the preforms (1).
  • After a sufficient temperature control of the preforms (1) they are transferred to the blowing wheel (25), in the region of which the blowing stations (3) are arranged.
  • the finished blown containers (2) are fed by further transfer devices to a delivery line (32).
  • thermoplastic material different plastics can be used.
  • PET, PEN or PP can be used.
  • the expansion of the preform (1) during the orientation process takes place by compressed air supply.
  • the compressed air supply is in a Vorblasphase in which gas, for example, compressed air, is supplied at a low pressure level and divided into a subsequent main blowing, in the gas with a higher Pressure level is supplied.
  • gas for example, compressed air
  • compressed air is typically used with a pressure in the interval of 10 bar to 25 bar and during the main blowing phase compressed air is supplied at a pressure in the interval of 25 bar to 40 bar.
  • the heating section (24) from a plurality of revolving transport elements (33) is formed, which are strung together like a chain and guided by guide wheels (34).
  • the chain-type arrangement would open up a substantially rectangular basic contour.
  • a single relatively large-sized guide wheel (34) and in the region of adjacent deflections two comparatively smaller dimensioned guide wheels (36) used In principle, however, any other guides are conceivable.
  • the arrangement shown to be particularly useful since in the region of the corresponding extent of the heating section (24) three deflecting wheels (34, 36) are positioned, and although in each case the smaller deflection wheels (36) in the region of the transition to the linear curves of the heating section (24) and the larger deflection wheel (34) in the immediate transfer area to the transfer wheel (29) and the input wheel (35).
  • chain-like transport elements (33) it is also possible, for example, to use a rotating heating wheel.
  • the fans (31) introduce cooling air into the region of cooling air ducts (39), which in each case oppose the associated radiant heaters (30) and emit the cooling air via outflow openings. Due to the arrangement of the outflow directions, a flow direction for the cooling air is realized essentially transversely to a transport direction of the preforming rings (1).
  • the cooling air ducts (39) can provide reflectors for the heating radiation in the area opposite the radiant heaters (30), and it is likewise possible to realize cooling of the radiant heaters (30) via the discharged cooling air.
  • FIG. 5 shows an illustration of the blowing station (3) modified from the representation in FIG. 1 in a viewing direction from the front.
  • the stretch rod (11) is supported by a stretch rod carrier (41), which consists of a support base (40) and one via a coupling element
  • roller carriers connected to the support base (40)
  • the roller carrier (43) holds the guide roller (17), which serves to position the stretching system.
  • the guide roller (17) is along a guided cam track, not shown. It is realized here a mechanical control of the stretching process.
  • the coupling element (42) illustrated in Fig. 5 can also be used in the embodiment according to Fig. 1 for enabling a complete mechanical decoupling of the cylinders (12) from each other or from a support element for the guide roller (17).
  • Fig. 5 illustrates a locked state of the coupling element (42) in which the support base (40) and the roller carrier (43) are interconnected by the coupling element (42).
  • a rigid mechanical coupling which leads to a positioning of the guide roller (17) being directly and directly converted into a positioning of the stretch rod (11).
  • an exactly predetermined positioning of the stretching rod (11) is present and the positioning of the stretching rod (11) is effected at a plurality of blowing stations (3) arranged on the blowing wheel (25) at each blowing station (3 ) exactly reproduced.
  • This exact mechanical specification of the positioning of the stretch rod (11) contributes to a high product quality and to a high uniformity of the container produced
  • Fig. 5 also shows the arrangement of a pneumatic block (46) for Blastikments the blow station
  • the pneumatic block (46) is equipped with high-pressure valves (47), which can be connected via connections (48) to one or more pressure supplies. After blow-molding of the containers (2), blown air to be discharged into an environment is blown over the tire. matic block (46) initially fed to a muffler (49).
  • a typical implementation of the blowing process can be illustrated most simply with reference to FIG. 2.
  • the stretching rod (11) is driven into the preform (1) with simultaneous blowing pressure support in such a way that the preform ( 1) is not radially shrunk onto the stretching rod (11) due to the axial stretching.
  • FIG. 6 shows a side view of a stretching device (50) provided with the stretch rod (11).
  • the stretching device (50) is formed as part of a blowing station (3), not shown, which rotates together with a blowing wheel (25).
  • the stretch rod (11) is coupled to a cam control (51) having a primary curve (52) extending along the extent of a stretching path.
  • a secondary curve (53) is arranged, which extends only along a partial region of the stretching path.
  • a pickup (54) which in the illustrated embodiment has two cam rollers (55, 56).
  • the cam rollers (55, 56) are arranged one behind the other in the direction of a longitudinal axis (57) of the stretch rod (11).
  • the stretch rod (11) is connected in the direction of the longitudinal axis (57) with a positioning rod (58) which carries the picker (54).
  • the positioning rod (58) is also coupled to a pressure device (59), which is realized in the illustrated embodiment as a pneumatic cylinder.
  • the pressure device (59) guides the cam roller (55) along the primary curve (52).
  • the secondary curve (53) is coupled to a positioning device (60) which predefines a controlled increase in distance between the primary curve (52) and the secondary curve (53) and thereby prevents a compulsory execution of the stretching process otherwise prescribed by the curve control can.
  • the positioning device (60) consists of a pneumatic cylinder (61) and a slide guide (62), which is coupled to the secondary cam (53).
  • the carriage guide (62) consists of two guide rods (63, 64) on which slidably bushes (65, 66) are guided.
  • the bushings (65, 66) are connected to one another via a cross-member (67) and to the pneumatic cylinder (61) and the secondary cam (63).
  • the positioning device (60) pivots the secondary cam (53) such that the pickup (54) is no longer forcibly guided by the secondary cam (53).
  • a piston rod (68) of the pneumatic cylinder (71) is fixed to a main cross member (69), which also connects the two guide rods (63, 64) with each other.
  • the secondary curve (53) is displaceably arranged in the illustrated embodiment along a cam track (70) defined by the primary curve (52). In this way, the portion of the mechanical mutual positive guidance of the pickup (54) can be changed.
  • a stretching of the preforms (1) with the mouth sections (21) takes place in a vertical direction oriented upwards.
  • the main cross member (69) and the guide rods (63, 64) are immovably connected together with the piston rod (68) with the other components of the blowing station (3).
  • the pneumatic cylinder (61) is actuated, the pneumatic cylinder (61) is thereby displaced together with the bushes (65, 66) along the guide rods (63, 64).
  • the bushes (65, 66) are rigidly connected to the secondary cam (53) and thereby perform the height positioning of the secondary cam (53).
  • Fig. 7 shows the arrangement in Fig. 6 according to the viewing direction VIl. It is particularly illustrated that the primary cam (52) is supported by a support member (73) which also supports the pressing means (59) and the main crosshead (69) to which the guide rods (63, 64) are attached. Clearly visible is the guidance of the superimposed cam rollers (55, 56) between the primary cam (52) and the secondary cam (53).
  • FIG. 8 shows the arrangement in FIG. 6 according to the viewing direction VIIi and thus from a viewing direction opposite to FIG. 7. Also from this view, in particular, the course of the guideway for the cam rollers (55, 56) can be seen again, which is spanned by the curves (52, 53).
  • Fig. 9 shows a longitudinal section along section line IX-IX in Fig. 6.
  • the assignment of the curves (52, 53) and the cam rollers (55, 56, 74) and the construction of the pneumatic cylinder (61) is illustrated.
  • Fig. 10 illustrates in a plan view the arrangement of the curves (52, 53) relative to each other and the extension of the primary curve (52) by the adapter (72).
  • the assignment of the pneumatic cylinder (61) to the guide rods (63, 64) can be recognized once again from the cross-sectional illustration in FIG. 11; moreover, the arrangement of the adapter (72) can be recognized as a damping curve.
  • the primary curve (62) serves as the stretching curve and the secondary curve (53) as the stretching curve.
  • a base member (75) serves to support and guide the secondary cam (53).
  • the cam roller (55) to the primary cam (52) and the cam roller (74) to the adapter (72) as a damping curve.
  • Figs. 10 and 11 further illustrate that the support member (73) is formed from pedestal members (76, 77) and vertical rods (78, 79) which interconnect the pedestal members (76, 77).

Landscapes

  • 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 pour le moulage par soufflage de contenants. Selon l'invention, une ébauche en matière thermoplastique est étirée par une tige d'étirage à l'intérieur d'un moule de soufflage après un conditionnement thermique et est moulée en un contenant sous l'effet de la pression de soufflage. Un système de guidage à courbes est utilisé pour déterminer le positionnement de la tige d'étirage. Dans ce système, au moins un élément de guidage couplé à la tige d'étirage est guidé des deux côtés le long d'une trajectoire incurvée uniquement le long d'un segment partiel d'un passage d'un mouvement de course de la tige d'étirage.
PCT/DE2006/001264 2005-09-26 2006-07-17 Procede et dispositif pour le moulage par soufflage de contenants WO2007033631A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE112006003249.6T DE112006003249B4 (de) 2005-09-26 2006-07-17 Verfahren und Vorrichtung zur Blasformung von Behältern

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DE102005045942A DE102005045942A1 (de) 2005-09-26 2005-09-26 Verfahren und Vorrichtung zur Blasformung von Behältern
DE102005045942.0 2005-09-26

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WO2007033631A3 WO2007033631A3 (fr) 2008-06-05

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WO2014114411A1 (fr) * 2013-01-22 2014-07-31 Krones Aktiengesellschaft Procédé pour faire fonctionner une installation de traitement de contenants, et installation de traitement de contenants

Families Citing this family (3)

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Publication number Priority date Publication date Assignee Title
DE102008005311A1 (de) * 2008-01-21 2009-07-23 Armin Steinke Vorrichtung zur Streckblasformung eines Behälters
DE102010028254A1 (de) 2010-04-27 2011-10-27 Krones Ag Streckblasmaschine
FR3043932B1 (fr) * 2015-11-25 2017-11-24 Sidel Participations Procede de commande d'une unite de moulage

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DE3815193A1 (de) * 1988-05-04 1989-11-16 Krupp Corpoplast Masch Verfahren und vorrichtung zum blasformen eines hohlkoerpers aus thermoplastischem kunststoff
DE20006524U1 (de) * 2000-04-08 2000-06-29 Krones Ag Streckblasmaschine
DE10246685A1 (de) * 2002-10-07 2004-04-29 Sig Technology Ltd. Vorrichtung zur Kurvensteuerung
EP1574318A1 (fr) * 2004-03-12 2005-09-14 SIG Technology Ltd. Procédé et appareil de formage de récipients par soufflage

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DE4212583A1 (de) 1992-04-15 1993-10-21 Krupp Corpoplast Masch Vorrichtung zur Blasformung
DE4340291A1 (de) 1993-11-26 1995-06-01 Krupp Corpoplast Masch Mehrfachnutzung von Blasluft
DE19906438A1 (de) 1999-02-16 2000-08-17 Krupp Corpoplast Masch Verfahren und Vorrichtung zur Übergabe von Behältern

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Publication number Priority date Publication date Assignee Title
DE3815193A1 (de) * 1988-05-04 1989-11-16 Krupp Corpoplast Masch Verfahren und vorrichtung zum blasformen eines hohlkoerpers aus thermoplastischem kunststoff
DE20006524U1 (de) * 2000-04-08 2000-06-29 Krones Ag Streckblasmaschine
DE10246685A1 (de) * 2002-10-07 2004-04-29 Sig Technology Ltd. Vorrichtung zur Kurvensteuerung
EP1574318A1 (fr) * 2004-03-12 2005-09-14 SIG Technology Ltd. Procédé et appareil de formage de récipients par soufflage

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014114411A1 (fr) * 2013-01-22 2014-07-31 Krones Aktiengesellschaft Procédé pour faire fonctionner une installation de traitement de contenants, et installation de traitement de contenants
US9527233B2 (en) 2013-01-22 2016-12-27 Krones Aktiengesellschaft Method for operating a container handling installation and container handling installation

Also Published As

Publication number Publication date
DE112006003249B4 (de) 2021-11-18
WO2007033631A3 (fr) 2008-06-05
DE112006003249A5 (de) 2008-08-28
DE102005045942A1 (de) 2007-04-12

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