CA2676615C - Aftercooling apparatus and method for aftercooling preforms - Google Patents

Aftercooling apparatus and method for aftercooling preforms Download PDF

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Publication number
CA2676615C
CA2676615C CA2676615A CA2676615A CA2676615C CA 2676615 C CA2676615 C CA 2676615C CA 2676615 A CA2676615 A CA 2676615A CA 2676615 A CA2676615 A CA 2676615A CA 2676615 C CA2676615 C CA 2676615C
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Prior art keywords
preforms
cooling
aftercooling
sleeves
blow
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CA2676615A
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French (fr)
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CA2676615A1 (en
Inventor
Stefan Bock
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Netstal Maschinen AG
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Netstal Maschinen AG
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Publication of CA2676615A1 publication Critical patent/CA2676615A1/en
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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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/72—Heating or cooling
    • B29C45/7207—Heating or cooling of the moulded articles
    • 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
    • B29C49/6427—Cooling 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
    • B29C49/6409—Thermal conditioning of preforms
    • B29C49/6463—Thermal conditioning of preforms by contact heating or cooling, e.g. mandrels or cores specially adapted for heating or cooling 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/72—Heating or cooling
    • B29C45/7207—Heating or cooling of the moulded articles
    • B29C2045/7264—Cooling or heating the neck portion 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
    • B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
    • B29C49/06—Injection blow-moulding
    • B29C2049/065—Means for compensating or avoiding the shrinking of preforms, e.g. in the injection mould or outside the injection mould
    • 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
    • B29C2791/00—Shaping characteristics in general
    • B29C2791/004—Shaping under special conditions
    • B29C2791/006—Using vacuum
    • 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
    • B29C2791/00—Shaping characteristics in general
    • B29C2791/004—Shaping under special conditions
    • B29C2791/007—Using fluid under pressure
    • 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
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/20—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer
    • B29C2949/22—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer at neck portion
    • 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
    • B29C2949/20—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer
    • B29C2949/24—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer at flange portion
    • 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
    • B29C2949/20—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer
    • B29C2949/26—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer at body portion
    • 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
    • B29C2949/20—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer
    • B29C2949/28—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer at bottom portion
    • 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
    • B29C2949/30—Preforms or parisons made of several components
    • B29C2949/3024—Preforms or parisons made of several components characterised by the number of components or by the manufacturing technique
    • 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
    • B29C2949/30—Preforms or parisons made of several components
    • B29C2949/3032—Preforms or parisons made of several components having components being injected
    • 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
    • B29C49/42073—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
    • B29C49/6427—Cooling of preforms
    • B29C49/643—Cooling of preforms from the inside
    • 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
    • B29C49/6427—Cooling of preforms
    • B29C49/6435—Cooling of preforms from the outside
    • 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
    • B29C49/6436—Thermal conditioning of preforms characterised by temperature differential
    • B29C49/6445—Thermal conditioning of preforms characterised by temperature differential through the preform length
    • B29C49/645—Thermal conditioning of preforms characterised by temperature differential through the preform length by cooling 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
    • B29C49/6463—Thermal conditioning of preforms by contact heating or cooling, e.g. mandrels or cores specially adapted for heating or cooling preforms
    • B29C49/6465—Cooling
    • 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
    • B29C49/6463—Thermal conditioning of preforms by contact heating or cooling, e.g. mandrels or cores specially adapted for heating or cooling preforms
    • B29C49/6466—Thermal conditioning of preforms by contact heating or cooling, e.g. mandrels or cores specially adapted for heating or cooling preforms on the inside
    • 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
    • B29C49/681—Ovens specially adapted for heating preforms or parisons using a conditioning receptacle, e.g. a cavity, e.g. having heated or cooled regions

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  • 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)
  • Containers Having Bodies Formed In One Piece (AREA)

Abstract

The invention relates to a device and a method for finishing and calibrating preforms (10) which are removed from a multiple injection tool in an unstable shape, and proposes an air cooler integrated into the water cooled cooling sleeves (21) for the outer side of the open end face of the preform (10). Particularly in the case of special preform varieties, the areas which are unsupported in the cooling sleeves (21) can be pre-strengthened on the outside, from the beginning of the transfer from the open molds (8, 9) to the removing and cooling sleeves, respectively, by means of a cooling which uses cooling air or low-temperature air. With the novel solution, the highest quality can be assured, in particular with respect to dimensional stability and the absence of pressure points under load, by means of a calibration in the cooling sleeves (32) and the treatment in the area of the aftercooling.

Claims (23)

What is claimed is:
1. Aftercooling apparatus for preforms (10), wherein the still dimensionally unstable preforms (10) are removed with a removal gripper (11) from the open mold halves (8, 9) of an injection molding machine and can be at least partially aftercooled in water-cooled removal or cooling sleeves (21), wherein air blowing devices are integrated in the cooling sleeves (21) in the region of the outer open end side of the preforms (10), via which air blowing devices the outer skin, at least in an unsupported region of the preforms (10), can be cooled with cooling air, wherein the preforms (10) can be air-cooled and hence solidified after insertion into the cooling sleeves (21) from the outside in the transition region between the threaded portion (44) and the neck ring (137) and/or to the transition region between the neck ring (137) and the blow-molded part (43), and the preforms (10) can be calibrated after retraction of the cooling sleeves (21) from the open mold halves (8, 9) by way of compressive or sealing rings (56), which are applied on nipples (30), within a single injection cycle;
wherein the apparatus comprises a device with a plurality of nipples (30), each nipple having an insertion part into the preforms (10), and that the insertion parts of the nipples (30) have radially expandable compressive or sealing rings (56) which can be introduced into the preforms (10); and, characterized in that the compressive rings are constructed as radially expandable sealing rings, by which a mechanically generated, adjustable sealing force can be produced in the direction of the interior wall of the preforms (10), for building up an expansion pressure in the interior space of the blow-molded part (43) of the preforms (10).
2. Aftercooling apparatus according to claim 1, characterized in that the apparatus comprises a controller, by which the air blowing device can be activated from the time the preform is transferred to the removal or cooling sleeves (21).
3. Aftercooling apparatus according to claim 2, ch a racterized in that the quantity of cooling air and/or the temperature of the cooling air can be controlled, wherein the maximum values can be adjusted immediately after the preform is transferred from the open mold halves (8, 9).
4. Aftercooling apparatus according to one of the claims 1 to 3, characterized in that the water-cooled removal sleeves comprise cooling channels (113) disposed in the region between the threaded portion (44) and the blow-molded part (43) or the cylindrical shaft, for a corresponding outside cooling of the preforms (10), and also an air fitting (112) for the cooling channels (113).
5. Aftercooling apparatus according to one of the claims 1 to 4, characterized in that depending on the geometric design of the preforms (10), the ventilation channels are arranged in the region between the threaded portion (44) and the neck ring (137) and/or in the transition region between the neck ring (137) and the cylindrical blow-molded part (43).
6. Aftercooling apparatus according to one of the claims 1 to 5, characterized in that the water-cooled removal sleeves are fabricated from standardized components, such that depending on the situation, guide rings (114) for the ventilation channels for cooling the transition region between the threaded portion (44) and the neck ring (137) and/or for cooling the transition region between the neck ring (137) and the cylindrical blow-molded part (43) can be inserted.
7. Aftercooling apparatus according to claim 1, characterized in that the compressive rings are floatingly supported sealing rings (56).
8. Aftercooling apparatus according to claim 1 or 7, characterized in that the nipples (30) can be inserted with a controlled position into the preforms (10) with the compressive rings into a selectable optimal sealing location in a region between threaded portion (44) and blow-molded part (43).
9. Aftercooling apparatus according to claim 1 or 8, characterized in that the preforms (10) can be transferred, while still in a hot, dimensionally unstable state, from the injection mold for aftercooling to water-cooled removal sleeves, and calibrated to exact outside dimensions using compressed air introduced through the nipples (30) which can be inserted into the preforms (10).
10. Aftercooling apparatus according to one of the claims 1, 8 and 9, characterized in that the nipples are arranged on a common actuating plate (16), with which controlled drive means are associated for insertion and positioning of the compressive or sealing rings (56) at an optimal insertion depth or at an optimal location for the sealing rings (56) in the preforms (10) or in the removal or cooling sleeves.
11. Aftercooling apparatus according to one of the claims 1 to 10, characterized in that it comprises a controllable removal gripper (11) having at least a number of water-cooled removal sleeves that corresponds to the number of injection molding positions of the injection molds.
12. Aftercooling apparatus according to claim 11, characterized in that the number of injection molding positions of the injection molds is a 3-fold to 4-fold number of the number of injection molding positions in a mold.
13. Aftercooling apparatus according to one of the claims 1 to 12, characterized in that it comprises a removal gripper (11) with the water-cooled removal sleeves, a transfer gripper (12, 12') with nipples (30) as well as an aftercooling (19) with a number of cooling positions, which corresponds to three to four times the number of injection molding positions, wherein the blow-molded part (43) of the preforms (10) can be calibrated in the removal sleeves, and the preforms (10) can be transferred in a predetermined exact shape within each injection cycle with the transfer gripper (12, 12') to the aftercooling (19) and after finish-cooling to a removal device (20).
14. Method for aftercooling of preforms (10) with a threaded portion (44), a blow-molded part (43) and a neck ring (137), which are at least partially aftercooled in water-cooled cooling sleeves (21) while still in a hot, dimensionally unstable state, wherein the outer skin of at least a part of outer open unsupported end sides of the preforms is cooled with cooling air via air blowing devices integrated in the cooling sleeves (21), characterized in that the preforms (10) after insertion into the cooling sleeves (21) are air-cooled from the outside in the transition region between the threaded portion (44) and the neck ring (137) and/or up to the transition region between the neck ring (137) and the blow-molded part (43) and thereby solidified, and are calibrated within a single injection cycle after withdrawal of the cooling sleeves (21) from the open mold halves (8, 9) by way of compressive or sealing rings (56) disposed on nipples (30).
15. Method according to claim 14, characterized in that the blow-molded parts (43) of the preforms (10) are calibrated after insertion of preforms (10) into the cooling sleeves (21) and the withdrawal from the open mold halves (8, 9) within the duration of a single injection cycle, the preforms (10) are calibrated on the interior wall of the cooling sleeves (12) to the exact outside dimensions by compressed air with continuously increasing pressure.
16. Method according to claim 14, characterized in that the compressed air for the calibration continuously rises in pressure from the start of the calibration, so that the outside skin of the preform (10) is further cooled down, wherein the rise of the air pressure is attained by increasing the control voltage of a control valve of in the compressed air supply.
17. Method according to one of the claims 14 to 16, characterized in that the nipples (30) are inserted into the preforms (10) with the compressive or sealing rings (56) with a controlled position into a selectable optimal sealing location in a region between the threaded portion (44) and the blow-molded part (43).
18. Method according to claims 14 to 16, characterized in that the nipples (30) are inserted into the preforms (10) with the compressive or sealing rings (56) with a controlled position up to the transition region between the threaded portion (44) and the neck ring (137) or to the transition region between the neck ring (137) and the blow-molded part (43).
19. Method according to one of the claims 14 to 18, characterized in that a) compressive or sealing rings (56) attached on nipples (30) are inserted with controlled positioning into each of the preforms (10) in the region between the threaded portion (44) and the blow-molded part (43), wherein b) the compressive or sealing rings (56) are expanded up to the contact with the inner wall of the preforms (10), and c) the interior space of the blow-molded part (43) is sealed to the outside by generating a force directed radially in the direction of the inner wall.
20. Method according to one of the claims 14 to 19, characterized in that an outside cooling of the preforms (10) with air starts immediately after transfer of the preforms (10) to the cooling sleeves (21) in the region between the threaded portion (44) and the cylindrical blow-molded part (43).
21. Method according to one of the claims 14 to 20, characterized in that application of cooling air for the preform (10) is controlled such that the maximum cooling effect starts immediately after the transfer of the preform.
22. Method according to one of the claims 14 to 21, characterized in that for preforms (10) with a widening neck, the transition region between the threaded portion (44) and the neck ring (137) is air-cooled from the outside.
23. Method according to one of the claims 14 to 22, characterized in that for preforms (10) with a neck portion that tapers on the outside, this region of the preforms is air-cooled from the outside.
CA2676615A 2007-01-25 2008-01-25 Aftercooling apparatus and method for aftercooling preforms Active CA2676615C (en)

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
CH121/07 2007-01-25
CH1212007 2007-01-25
CH7592007 2007-05-09
CH759/07 2007-05-09
CH1452/07 2007-09-18
CH14522007 2007-09-18
PCT/EP2008/050840 WO2008090207A1 (en) 2007-01-25 2008-01-25 Aftercooling device and method for aftercooling preforms

Publications (2)

Publication Number Publication Date
CA2676615A1 CA2676615A1 (en) 2008-07-31
CA2676615C true CA2676615C (en) 2014-10-14

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CA2676615A Active CA2676615C (en) 2007-01-25 2008-01-25 Aftercooling apparatus and method for aftercooling preforms

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