WO2001068350A1 - Verfahren zur temperierung von vorformlingen sowie vorrichtung zur temperierung - Google Patents
Verfahren zur temperierung von vorformlingen sowie vorrichtung zur temperierung Download PDFInfo
- Publication number
- WO2001068350A1 WO2001068350A1 PCT/DE2001/000842 DE0100842W WO0168350A1 WO 2001068350 A1 WO2001068350 A1 WO 2001068350A1 DE 0100842 W DE0100842 W DE 0100842W WO 0168350 A1 WO0168350 A1 WO 0168350A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- preforms
- movement
- translation
- heating device
- drive
- Prior art date
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
- B29C49/64—Heating or cooling preforms, parisons or blown articles
- B29C49/6409—Thermal conditioning of preforms
- B29C49/6436—Thermal conditioning of preforms characterised by temperature differential
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2949/00—Indexing scheme relating to blow-moulding
- B29C2949/07—Preforms or parisons characterised by their configuration
- B29C2949/0715—Preforms or parisons characterised by their configuration the preform having one end closed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
- B29C49/06—Injection blow-moulding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/64—Heating or cooling preforms, parisons or blown articles
- B29C49/6409—Thermal conditioning of preforms
- B29C49/6436—Thermal conditioning of preforms characterised by temperature differential
- B29C49/6458—Thermal conditioning of preforms characterised by temperature differential tangentially, i.e. along circumference
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/64—Heating or cooling preforms, parisons or blown articles
- B29C49/68—Ovens specially adapted for heating preforms or parisons
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/64—Heating or cooling preforms, parisons or blown articles
- B29C49/68—Ovens specially adapted for heating preforms or parisons
- B29C49/685—Rotating the preform in relation to heating means
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/712—Containers; Packaging elements or accessories, Packages
Definitions
- the invention relates to a method for tempering preforms made of a thermoplastic material, the preforms being provided for blow molding in containers, in which the preform is provided with a temperature profile along a circumference, and in which the preforms are guided along at least one heating device along a translation path and are at least temporarily rotated with respect to their longitudinal axes.
- the invention further relates to a device for tempering preforms made of a thermoplastic material, the at least one conveyor line for the preforms and at least one Has heating device and provides the preforms with a temperature profile in the circumferential direction of the preforms, and in which a rotary drive is provided to carry out a rotational movement of the preforms and a translational drive is provided to move the preforms past the heating device.
- Such a method is used, for example, when containers are to be produced whose cross-section deviates from a circular shape.
- the deviation can consist, for example, of producing containers with an oval cross section or, for example, with a triangular or square cross section.
- EP-OS 0 620 099 contains a compilation of methods known from the prior art for the temperature conditioning of preforms.
- this publication also explains how to guide the preform past an alternating arrangement of heating elements and cool areas in such a way that the desired temperature profile is provided by coordinating the distances and the dimensions of the respective heating devices with the translation speed and the rotational speed of the preforms being passed.
- such an arrangement requires an unnecessarily large spatial extension, a large number of parameters have to be matched exactly to one another and an adaptation to different product requirements has proven to be extremely complex.
- DE-OS 196 08 570 describes a method in which a simplified constructional implementation is made possible by a stepwise rotation of the preforms to be provided with the temperature profile.
- DE-OS 197 57 818 explains a method and a device in which the preforms are held by support elements which can be pivoted about cam rollers along a cam track around their respective longitudinal axes and thereby support the application of a temperature profile in the circumferential direction.
- Such a device is particularly suitable for the temperature control of a large number of preforms per heating unit, but here, too, changes in the product requirements cause relatively high changes.
- control of the rotary movement is carried out at least temporarily decoupled from the translation movement and in that the control of the translation movement is carried out in such a way that peripheral regions of the preforms to be heated to a greater temperature face the heating device than peripheral regions of the preforms to be cooled to a longer temperature.
- Another object of the present invention is to construct a device of the type mentioned in the introduction in such a way that the production of containers with different circumferential geometries is facilitated.
- the rotary drive has a control decoupled from the translation drive and in that the control has a setpoint generator for a time-variable setpoint profile of the
- an expedient implementation consists in the fact that at least two preforms are transported clocked at the same time.
- the preforms be rotated while the translation movement is interrupted.
- the rotary movement is at least temporarily superimposed on a translation movement.
- a simple movement control is supported in that the rotary movement is carried out step by step.
- Another variant of the method is that the rotary movement is carried out continuously at least in sections.
- a further increase in the design options when specifying the temperature profile can be achieved in that the rotary movement is carried out with an alternating direction of rotation.
- the preforms are heated essentially from a predeterminable direction.
- a high heating effectiveness can be supported in that the preforms are heated from two directions that are essentially opposite to each other.
- the preforms, carried by a support element, are guided past the heating device.
- a high heating intensity is supported in that the heating device is provided with radiant heaters.
- An easy positioning of the support element can be supported in that the support elements are provided with a guide profile for specifying their respective rotational positioning.
- a high degree of accuracy in specifying the rotational movements can be supported in that the rotary drive is designed as a gear drive.
- a simple mechanical structure is supported in that the rotary drive has a rotating drive element.
- the rotational movement can be supported in that at least one turntable positioned by the rotary drive is arranged along the translation path.
- a division of the translation path into areas in which a rotational movement is carried out and in areas in which no rotational movement is carried out is supported in that at least two turntables are arranged along the translation path, between which a curve segment is positioned.
- the rotary drive is designed as a stepper motor.
- Exemplary embodiments of the invention are shown schematically in the drawing. Show it:
- Fig. 1 is a schematic representation of a part of the translation path of the preforms in the area of the heating device with an alternating arrangement of guide rails and turntables for guiding control rollers which are attached to support elements for the preforms.
- FIG. 3 shows a schematic illustration of two heating elements arranged opposite one another with a schematically illustrated positioning of a preform during a cyclical translation movement
- FIG. 5 shows the arrangement according to FIG. 4 when a rotary movement is carried out and simultaneous continuous heating
- FIG. 6 the arrangement according to FIG. 5 during the execution of a second double-sided heating phase
- Fig. 7 shows the arrangement of FIG. 6 when performing a further rotary movement with continuous heating
- FIG. 8 shows the arrangement according to FIG. 7 with a schematically illustrated exit movement of the preform from the area of the heating device.
- FIG. 1 shows a basic illustration of a positioning device (1) which is arranged in the area of a heating section (2) of a blowing device.
- the positioning device (1) consists of cam segments (3) and turntables (4).
- the curve segments (3) and the turntable (4) are each arranged alternately along a translation path (5) of preforms (6) shown in FIG. 2.
- the curve segments (3) and the turntable (4) are provided with guide grooves (7), which are provided for aligning cam rollers (8), which are fastened to support elements (9) for the preforms (6) shown in FIG. 2.
- the turntables (4) have gears which are not visible in FIG. 1 and which cooperate with a toothed belt system, a drive chain or other suitable drive elements.
- the toothed belt (10) is positioned by a rotary drive (11).
- the turntables (4) are provided with markings (12) which are detected by sensors (13). Through the Sensor monitoring of the markings (12) ensures that the turntables (4) are aligned.
- Heating devices (14) can be arranged on both sides or on one side along the translation path (5).
- the heating devices (14) can be provided with IR radiators, for example. In principle, however, other heating elements can also be used, for example HF radiators or blowers for hot air.
- the structure of a preferred embodiment for the support elements (9) results from the vertical sectional view in FIG. 2.
- the support elements (9) are positioned by support elements (15) which are connected to the support elements (9) in the area of support arms (16) via rotary bearings (17, 18).
- the preforms (6) can be slipped onto the support elements (9) in the vertical direction from above.
- the cam roller (8) is laterally offset from a longitudinal axis (19) of the support element (9). This causes a pivoting movement of the support element (9) relative to its longitudinal axis (19) when the cam roller (8) is pivoted.
- the support elements (15) guide the support elements (9) in the vertical direction above the curve segments (3) and the turntable (4) in such a way that the cam roller (8) of the support element (9) is guided in the guide grooves (7).
- cam rollers (8) has advantages in reducing frictional forces.
- the arrangement shown in FIG. 1 is particularly advantageous for preforms (6) which are transported in cycles along the translation path (5).
- the cyclical translation movement is expediently carried out in such a way that the cam rollers (8) are guided within the cam segments (3) during the movement phases and that the cam rollers (8) are positioned in the region of the turntable (4) during the respective rest phases.
- the turntable (4) rotates, the support elements (9) and the preforms (6) held thereby are rotated.
- toothed belt (10) or comparable drive elements act directly on the support elements (9).
- the specific constructive implementation depends on the respective application requirements.
- FIGS. 3 to 8 The implementation of a heating process for generating a temperature profile in the circumferential direction of the preforms (6) is explained in FIGS. 3 to 8.
- the same positioning of the heating section (2) is shown locally, which in this case is provided with two heating devices (14) located opposite one another.
- the preform (6) is first positioned between the two heating devices (14).
- the Positioning is preferably carried out at substantially equal distances from the two heating devices (14).
- the regions of the preform (6) facing the two heating devices are first heated. Because of their lateral positioning facing away from the heating devices (14), the transition areas between the heated zones of the preform (6) initially remain cooler than the areas directly facing the heating devices (14).
- the arrangement of the heating devices (14) opposite one another means that no rotation of the preforms (6) is required to generate a temperature profile in the circumferential direction.
- the rotational movement shown in FIG. 5 makes it possible to influence the temperature distribution in the transition area between the two already heated wall sections of the preform (6). Influencing results from the speed, the course of the speed and the number of revolutions of the preform (6).
- FIG. 6 shows a further heating phase in which, as in the illustration in FIG. 4, there is no rotational movement of the preform (6). 7, the preform (6) is again rotated.
- Direction of rotation can vary depending on generating temperature profile can be specified.
- Fig. 8 shows schematically the continuation of the translation movement of the preform (6) for further transport.
- the preforms (6) can be fed to different heating devices (14) one after the other in order to realize the final temperature profile to be generated.
- the paired arrangement of heating devices (14) supports the generation of symmetrical temperature profiles with a short heating time.
- thermoforming the preform (6) uniformly in advance and then to generate the temperature profile using the movement described. It is also possible to provide a sequence of movements of the preform (6) during rotation such that the temperature profile is reached starting from a cold preform (6) through the respective movement phases.
- thermoplastic materials can be processed in accordance with the described method and with the aid of the described device.
- the preform (6) is initially tempered substantially uniformly in the area to be tempered and then provided with a superimposed temperature profile
- this tempering process is also both in the circumferential direction of the preform (6) and in the longitudinal direction of the preform (6) or combined in both spatial orientations.
- the heat profile in the longitudinal direction is selected in particular so that a high and uniform orientation of the material is achieved in order to ensure both a good resistance of the blown container and a low use of material.
- clamping rings can be used to fix the preforms (6) in the area of the support elements (9).
- the intermittently operated devices are implemented in particular in connection with the implementation of the one-step process, in which the preforms (6) are first injection molded in the area of an injection molding module and transferred to a blow molding module after demolding and a suitable intermediate temperature control. In the area of the blow module, the preforms are then stretched and inflated by the action of compressed air. These process steps lead to a biaxial orientation of the material.
Landscapes
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002403367A CA2403367A1 (en) | 2000-03-16 | 2001-03-03 | Method for controlling the temperature of preforms and a temperature-controlling device |
EP01916904A EP1272331A1 (de) | 2000-03-16 | 2001-03-03 | Verfahren zur temperierung von vorformlingen sowie vorrichtung zur temperierung |
AU2001244075A AU2001244075A1 (en) | 2000-03-16 | 2001-03-03 | Method for controlling the temperature of preforms and a temperature-controllingdevice |
JP2001566884A JP2003526544A (ja) | 2000-03-16 | 2001-03-03 | プリフォームの温度制御方法及び温度制御装置 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10012765.7 | 2000-03-16 | ||
DE10012765A DE10012765A1 (de) | 2000-03-16 | 2000-03-16 | Verfahren zur Temperierung von Vorformlingen sowie Vorrichtung zur Temperierung |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001068350A1 true WO2001068350A1 (de) | 2001-09-20 |
Family
ID=7634914
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2001/000842 WO2001068350A1 (de) | 2000-03-16 | 2001-03-03 | Verfahren zur temperierung von vorformlingen sowie vorrichtung zur temperierung |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP1272331A1 (de) |
JP (1) | JP2003526544A (de) |
AU (1) | AU2001244075A1 (de) |
CA (1) | CA2403367A1 (de) |
DE (1) | DE10012765A1 (de) |
WO (1) | WO2001068350A1 (de) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102014118292A1 (de) * | 2014-12-10 | 2016-06-16 | Krones Aktiengesellschaft | Vorrichtung und Verfahren zum Erwärmen von Kunststoffvorformlingen mit Profilierung |
DE102021133791A1 (de) | 2021-12-20 | 2023-06-22 | Krones Aktiengesellschaft | Vorrichtung und Verfahren zum Herstellen von Kunststoffbehältnissen mit nicht kreisförmigen Querschnitten |
DE102021133783A1 (de) | 2021-12-20 | 2023-06-22 | Krones Aktiengesellschaft | Vorrichtung und Verfahren zum Herstellen von Kunststoffbehältnissen mit nicht kreisförmigen Querschnitten |
US11883998B2 (en) * | 2021-12-20 | 2024-01-30 | Krones Ag | Apparatus and method for producing plastic containers with non-circular cross-sections |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4831342B2 (ja) | 2006-12-08 | 2011-12-07 | 東洋製罐株式会社 | プリフォーム加熱システム |
DE102010044828A1 (de) * | 2010-09-09 | 2012-03-15 | Krones Aktiengesellschaft | Vorrichtung und Verfahren zur Herstellung ovaler Kunststoffbehältnisse |
IT201800003400A1 (it) * | 2018-03-09 | 2019-09-09 | Smi Spa | Forno per preforme |
JPWO2022181627A1 (de) * | 2021-02-25 | 2022-09-01 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19608570A1 (de) * | 1996-03-06 | 1997-09-11 | Krupp Corpoplast Masch | Verfahren zur Temperierung von Vorformlingen sowie Vorrichtung zur Temperierung |
US5681521A (en) * | 1993-04-15 | 1997-10-28 | Sidel | Process and equipment for heat treatment of the body of a preform or of an intermediate-stage container made of a thermoplastic material |
US5853775A (en) * | 1997-12-05 | 1998-12-29 | Electra Form, Inc. | Non-Round container blow molding apparatus |
DE19757818A1 (de) * | 1997-12-24 | 1999-07-01 | Krupp Corpoplast Masch | Verfahren zur Temperierung von Vorformlingen sowie Vorrichtung zur Temperierung |
US6146134A (en) * | 1999-05-20 | 2000-11-14 | Husky Injection Molding Systems Ltd. | Oven-pallet alignment and profiled heating of preforms |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5292243A (en) * | 1992-09-28 | 1994-03-08 | Cincinnati Milacron Inc. | Apparatus for heating portions of container preforms |
DE19906438A1 (de) * | 1999-02-16 | 2000-08-17 | Krupp Corpoplast Masch | Verfahren und Vorrichtung zur Übergabe von Behältern |
-
2000
- 2000-03-16 DE DE10012765A patent/DE10012765A1/de not_active Withdrawn
-
2001
- 2001-03-03 EP EP01916904A patent/EP1272331A1/de not_active Withdrawn
- 2001-03-03 JP JP2001566884A patent/JP2003526544A/ja active Pending
- 2001-03-03 CA CA002403367A patent/CA2403367A1/en not_active Abandoned
- 2001-03-03 WO PCT/DE2001/000842 patent/WO2001068350A1/de not_active Application Discontinuation
- 2001-03-03 AU AU2001244075A patent/AU2001244075A1/en not_active Abandoned
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5681521A (en) * | 1993-04-15 | 1997-10-28 | Sidel | Process and equipment for heat treatment of the body of a preform or of an intermediate-stage container made of a thermoplastic material |
DE19608570A1 (de) * | 1996-03-06 | 1997-09-11 | Krupp Corpoplast Masch | Verfahren zur Temperierung von Vorformlingen sowie Vorrichtung zur Temperierung |
US5853775A (en) * | 1997-12-05 | 1998-12-29 | Electra Form, Inc. | Non-Round container blow molding apparatus |
DE19757818A1 (de) * | 1997-12-24 | 1999-07-01 | Krupp Corpoplast Masch | Verfahren zur Temperierung von Vorformlingen sowie Vorrichtung zur Temperierung |
US6146134A (en) * | 1999-05-20 | 2000-11-14 | Husky Injection Molding Systems Ltd. | Oven-pallet alignment and profiled heating of preforms |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102014118292A1 (de) * | 2014-12-10 | 2016-06-16 | Krones Aktiengesellschaft | Vorrichtung und Verfahren zum Erwärmen von Kunststoffvorformlingen mit Profilierung |
DE102021133791A1 (de) | 2021-12-20 | 2023-06-22 | Krones Aktiengesellschaft | Vorrichtung und Verfahren zum Herstellen von Kunststoffbehältnissen mit nicht kreisförmigen Querschnitten |
DE102021133783A1 (de) | 2021-12-20 | 2023-06-22 | Krones Aktiengesellschaft | Vorrichtung und Verfahren zum Herstellen von Kunststoffbehältnissen mit nicht kreisförmigen Querschnitten |
US11883998B2 (en) * | 2021-12-20 | 2024-01-30 | Krones Ag | Apparatus and method for producing plastic containers with non-circular cross-sections |
Also Published As
Publication number | Publication date |
---|---|
JP2003526544A (ja) | 2003-09-09 |
EP1272331A1 (de) | 2003-01-08 |
DE10012765A1 (de) | 2001-09-20 |
CA2403367A1 (en) | 2001-09-20 |
AU2001244075A1 (en) | 2001-09-24 |
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