WO2008090207A1 - Nachkühlvorrichtung und verfahren für das nachkühlen von preformen - Google Patents
Nachkühlvorrichtung und verfahren für das nachkühlen von preformen Download PDFInfo
- Publication number
- WO2008090207A1 WO2008090207A1 PCT/EP2008/050840 EP2008050840W WO2008090207A1 WO 2008090207 A1 WO2008090207 A1 WO 2008090207A1 EP 2008050840 W EP2008050840 W EP 2008050840W WO 2008090207 A1 WO2008090207 A1 WO 2008090207A1
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- WIPO (PCT)
- Prior art keywords
- preforms
- cooling
- air
- sleeves
- cooled
- Prior art date
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Classifications
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- 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
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- 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
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- 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
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- 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
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- 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
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- 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
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- 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
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- 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
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- 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
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- 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
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- 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
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- 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
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- 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
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- 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
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- 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
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- 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
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- 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
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- 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
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- 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
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- 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
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- 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
Definitions
- the invention relates to an aftercooling device for preforms, wherein the still dimensionally unstable preforms are removed by means of a removal gripper, the open mold halves of an injection molding and at least partially nachkühlbar in water-cooled extraction or cooling sleeves.
- the preforms are removed from the open molds by a light removal robot without cooling effect and transferred to an aftercooler and subsequently cooled.
- the robot function is divided into a removal gripper with water-cooled removal sleeves and an additional transfer gripper for transfer to an aftercooler.
- the injection molding machine cycle time is further shortened, whereby the preforms are removed from the molds in a soft and dimensionally unstable state. But so far less noticed problems come to the fore. For physical reasons, the cooling within the walls of the preforms runs unevenly:
- the preforms must be solidified in the mold halves so strong that they can be taken without damage from the removal aids and handed over to a removal device.
- the removal device has a shape adapted to the dimensions of the injection molded part.
- the intensive water cooling in the injection mold halves results, for physical reasons, a time-delayed temperature reduction down to the core area of the preform wall. This means that the mentioned about 70 ° C are not uniformly achieved in the entire cross section. The consequence is that seen in the material cross-section, a rapid re-heating from the inside to the outside, as soon as the intensive water cooling is interrupted by the forms. Aftercooling of the preforms outside the mold is of great importance for two reasons.
- the Applicant proposes an intensive cooling station and a post-cooling station and, in the case of the intensive cooling station, insertable cooling pins for internal cooling in the preforms.
- the inner shape of the cooling sleeves is matched to the corresponding inner shape of the injection mold, such that the preforms after removal from the injection molds are as far as possible inserted into the cooling sleeves as far as possible to the solid wall system. If the preforms are in a lying position during the first phase of the aftercooling, then they tend to lay down on the corresponding cooling sleeve part. Due to a more intensive cooling contact in the lower area, the preforms are cooled down more strongly, whereby stresses occur in the preform and the preform has a tendency to ovalize.
- the aftercooling device according to the invention is characterized in that the cooling sleeves are integrated in the region of the outer open end side of the preforms with air blowing devices, via which the outer skin, at least one unsupported region of the preforms, can be solidified with cooling air.
- the inventive method is characterized in that the outer skin, at least part of the outer open non-supporting end sides of the preforms, are cooled by air blowing devices, which are integrated in the cooling sleeves with cooling air and thereby solidified.
- Another delicate preform has an extension in the corresponding neck part.
- the new invention makes it possible that even with a strong reduction of the dry-running time, the dimensional accuracy can be fully maintained. This means that due to the special air cooling of the outer open end side there is also a reserve for an even shorter machine cycle time. Field tests have shown that with clear preforms the machine cycle time can be reduced by 15% and with dyed preforms by 20%.
- the new invention allows a number of particularly advantageous embodiments. It is to the claims 2 - 17 and 19 - 29 reference.
- the aftercooling device is assigned a refrigeration unit for generating cryogenic air, in particular below 0 ° C. It is associated with a pressure generator for the cooling air, with an air pressure of less than 2 bar, preferably less than 1, 2 bar, for the cooling air can be generated.
- the operation of the insert is controlled, the aftercooling device having a control by means of which the air blowing device can be activated immediately, from the moment of the preform transfer to the removal or cooling sleeves.
- the use of deep-frozen air brings two enormous advantages: First, an even more intensive immediate solidification of the outer skin in the opening area can be achieved immediately after the transfer of the preforms, which are still hot-drawn from the injection molds.
- the frozen air allows as another advantage to reduce the amount of cooling air.
- the air pressure can be reduced to only 1 bar instead of 4 bar. It can be achieved with a much smaller amount of air, the same effect as with ambient air.
- the frozen air can be controlled in terms of quantity and temperature targeted.
- the air blowing device is designed as directed against the outer, open end side of the preforms air ducts.
- the aftercooling device has an activation and deactivation control, by means of which the air blowing device can be activated from the moment of preform transfer to the removal or cooling sleeves and during the calibration phase.
- the solution according to the invention can be used in the field of aftercooling wherever there is a risk of damage due to handling.
- the nipples are arranged on a common actuation plate on a platform, via which the retraction and extension movement of the nipple into or out of the preforms and the positioning of the nipple takes place within the sampling sleeves.
- the platform controlled drive means are assigned to the positioning of the press or sealing rings in an optimal penetration or at an optimal location.
- the removal of the preforms from the removal sleeves and the transfer to cooling sleeves of an aftercooler takes place when a sufficient dimensional stability is achieved, but within the time of an injection molding cycle.
- the press or sealing rings can be relaxed and the pressure in the interior of the blowing parts can be released.
- a negative pressure can be generated via the air channels via the nipples and the preforms can be transferred to the aftercooler by means of the nipples.
- the nipple has no cooling function for this purpose.
- the nipples are equipped with air channels, via which in the preforms vacuum for Preformentddling can be generated.
- a very special advantage is that even before the calibration on the critical non-supporting parts of the preforms, immediately after the transfer from the open mold halves to the cooling sleeves, the outer skin of the preforms is immediately solidified more strongly, so that the mechanical gripper forces no negative impact on the have corresponding areas.
- the transition region between the threaded part and the neck ring is air-cooled from the outside.
- the preforms are pushed to the stop of the neck rings on the front side of the cooling sleeves, wherein the cooling sleeves are formed so that between the bottom part of the preforms and the corresponding bottom part of the cooling sleeves a minimum gap, preferably in the range of hundredths of a millimeter, remains can be canceled with the calibration.
- FIG. 2a shows a nipple optimally inserted into a preform in the region of the open end side of the preform
- Figure 2b shows a nipple in an enlarged scale with a floating arranged pressing or sealing ring.
- FIG. 3 a shows an external cooling of the transition region between
- Removal robot is designed as an aftercooler;
- FIG. 9 shows a heat profile recorded on a preform, which without
- FIG. 10a shows a test example with a preform calibration
- FIG. 10b shows a faulty preform in which the transition region which was not supported in the cooling sleeve without solidification according to the invention.
- the injection molded parts 10 are produced in the cavities between mandrels 26 and cavities 27. After opening the mold halves 8 and 9, the sleeve-shaped injection-molded parts 10 adhere to the mandrels 26. The same injection-molded parts 10 in the finished cooled state are shown in Figure 7 top left, where they are just dropped from a Nachkühl issued 19. The upper spars 6 are for the purpose of better showing the details between the open mold halves shown interrupted. According to the solution according to FIGS. 1 and 7, the four method steps for the injection-molded parts 10 after completion of the injection molding process correspond to a first approach:
- A is the removal of the injection molded parts or preforms 10 from the two mold halves.
- the still plastic parts are thereby from one in the space between the open
- B is the phase of calibration and intensive cooling.
- Figures 1 and 7 show as it were snapshots of the main steps for the handling according to the first approach.
- the injection molding parts 10 arranged vertically one above the other are taken over by the transfer gripper 12 or 12 'and brought into a standing position, according to the phase "C", by pivoting the transfer device in the direction of the arrow P.
- the transfer gripper 12 consists of a pivotable about an axis 13 platform 17 which carries an actuating plate 16, which are arranged at a parallel distance from each other.
- the actuator plate 16 is parallel to the platform 17 via a drive or adjusting means 18 exhibited, so that in the position "B" the sleeve-shaped injection molded parts 10 taken from the removal device 1 1 and pivoted in the position "C” position in the overlying Nachkühl interference 19 can be pushed.
- the respective transfer takes place by changing the distance "S” between the actuating plate 16 and the platform 17.
- the still hot injection-molded parts 10 are ready-cooled in the Nachkssel issued 19 and ejected after a displacement of the Nachkssel sexual 19 in the position "D" and on a conveyor belt 20th thrown.
- the reference numeral 23 denotes the water cooling with corresponding supply and discharge lines, which are indicated for simplicity with arrows and are assumed to be known.
- the reference numerals 24/25 indicate the air side, wherein 24 for the injection resp. the compressed air supply and 25 for the vacuum resp. Air suction stands ( Figures 6a and 6c). From Figure 2a, the direct relationship between the function of the nipple 30 as Kalibriernippel and the conical portion 47 of a preform 10 is expressed. The corresponding conical outer part of the preform 10 is cooled in advance immediately after removal from the open mold halves 8, 9 in advance and solidifies the non-supporting outer wall layer within the cooling sleeve 21 (FIG. 3b). This gives the entire preform at the tapered transition 47 a sufficient dimensional stability. Outwardly, the air guide ring 1 14 is held within the head portion 143 of the cooling sleeve 21.
- FIGS. 2a and 3b show that before the pressing or sealing ring 56 comes into contact with the preform, the cooling air is in action.
- FIG. 2b shows the insertion part of the nipple 30 according to FIG. 6a on a larger scale.
- a very preferred feature is the floating bearing of the pressing or sealing ring 56.
- the pressing ring 56 is held on both end sides by means of loose support rings 100.
- the two loose support rings 100 have an inner diameter "D", which is greater by a small clearance than the outer diameter "d" of the support tube 52.
- game "Sp" between the support ring 100 and the connector 80. So gets the pressing or sealing ring 56 in the inactive state a freedom of movement in terms of a slight Taumeins or swimming.
- the result is automatically an optimum annular sealing point, e.g. 57, 57 'or 57 "on the pressing or sealing ring 56.
- FIGS. 3a and 3b show an external cooling of the preforms 10xx in the not uncritical transition 47 between the threaded part 44 and the blower part 43.
- Many preforms 10xx have an outer conical taper 110 in this section.
- This conical taper 10 is disadvantageous inasmuch as the region 47 of the taper vis-a-vis the cooling sleeve 21 is unsupported. There is no contact with the inner wall 1 11 of the cooling sleeves. Cooling air can be injected via an air connection 1 12 and discharged back into the open air via a cooling duct 1 13. This additional cooling has the great advantage that it can be used effectively from the first moment of transfer of the preforms 10 to the cooling sleeves 21 and additionally over the entire calibration time.
- FIGS. 4a and 4b show a preform 10x with a conically widened neck piece 136.
- the widened neck piece already belongs to the blow molding part and rests on the inner wall of the cooling sleeve 130 during the calibration.
- the cooling sleeve inner wall gives the preform 10x the definitive outer shape.
- the whole blown part of the preform 10x is up to the neck ring 137.
- the optimum sealing point of the pressing or sealing ring 56 lies in the region of the cylindrical portion in the region of the neck ring 137 (FIG. 5b). But this part is at risk of deformation of the pressing or sealing ring 56 in terms of deformation, since this part is only partially supported from the outside.
- KL external air cooling
- FIG. 4b shows yet another interesting design concept.
- the cooling sleeve is composed of standardized components and consists of an inner cooling sleeve 130, an outer cooling sleeve 131 and a jacket sleeve 132 and a head ring 133, with which the air channels (gap Sp) are formed.
- the inner cooling sleeve 130 is designed and a corresponding head ring 133 or 1 14 mounted.
- FIG. 5b shows a preform with an enlarged diameter in the region of the open end. This preform is no longer supported in the area Neckring 137 and thread in the cooling sleeve.
- the outer skin of said area is solidified immediately after the transfer of the injection molds to a removal gripper with cooling air.
- FIG. 5c shows a solution which can prevent deformations, especially bumps in the relevant section, when the corresponding blow part is tapered (FIG. 10b). This is especially true for extremely short cycle times of less than 10 seconds and for thicker preform wall thicknesses.
- the thread In the common preforms for PET bottles of 1 - 2 liters content of treated with cooling air section is usually 3 to 5 cm, the thread itself makes up about 2 cm.
- the preform will, except for a brief interruption, immediately after
- Extraction sleeves 40 pressed on; the short break for a 100% concern of the preform 10 is made up for by the much longer lasting calibration; After calibration, the preforms 10, 10x, 10xx are already in a dimensionally stable state on all sides. Therefore, the preforms 10, 10x, 10xx remain dimensionally stable in their outer geometric shape after calibration until the final cooled state.
- FIGS. 6a, 6b and 6c show the calibration and removal of the preforms 10 from the extraction sleeves 40 by means of the nipples 30 in the function of holding nipples.
- the interior of the blower part is set to negative pressure (FIG. 6a), or the preform 10 is sucked to the nipple 30 (symbol) according to FIG. 6b.
- a centering ring 58 is attached at the rear end, which fits exactly to the open end of the preform 10, for holding the preforms exactly on the nipples 30.
- compressed air is applied to the closed preform end (+ sign ) according to FIG. 6c.
- the preform 10 goes to stop 50 to the actuator plate 16 and the removal sleeve 40 can be completely removed and passed, for example, the aftercooler or be dropped according to a second approach by switching to compressed air.
- the control of the compressed air supply is shown schematically.
- a voltage-controlled control valve 35, 38 is set via the voltage in volts by means of control 39, the compressed air supply for the calibration, preferably from the beginning of the calibration, a continuous swelling of the inflation pressure is sought.
- This can be counteracted by cooling effect of the cooling sleeve 21-adjusting shrinkage of the preform 10 and a rapid solidification of the outer skin can be achieved.
- the preform 10 can thus be pressed against the inner wall of the cooling sleeve in an optimal manner during the entire duration of the calibration without causing bloating in the area of the unsupported areas or damage due to the handling of the preforms.
- FIG. 7 shows a station at the end of the injection process with opened mold halves 8 and 9, respectively.
- the temperature of the preforms 10 was lowered in the mold with maximum cooling effect.
- the preforms 10 may well still be dimensionally unstable, such that they could deform with immediate ejection after the mold opening at the slightest external force.
- the removal device is already in start position ( Figure 1) and can be lowered after the mold opening without time delay between the open mold halves.
- an independent post-cooling device 19 is used, in which the still-hot preforms 10 are finished cooled during 3 to 4 injection molding cycles.
- a transfer gripper 12 transfers the preforms 10 to the post-cooling device 19.
- the post-cooling of the preforms takes place in water-cooled sleeves.
- the horizontal plane is designated by EH and the vertical plane by EV.
- the horizontal plane EH is defined by the two coordinates X and Y and the vertical plane by the coordinates Y and Z.
- the Z coordinate is vertical, and the X coordinate is oriented transversely to it.
- the transfer gripper 12 performs a pivotal movement as well as a linear movement in the X-coordinate.
- the transfer gripper 12 can be additionally formed with a controlled movement in the Y-coordinate. Because the transfer gripper 12 already has a controlled movement in the X coordinate, the exact positioning of the preforms 10 located on the nipples 30 of the transfer gripper 12 in the X direction can be performed by a correspondingly controlled / regulated movement.
- the aftercooler 19 For the transfer of the preforms 10 to the aftercooler 19, the aftercooler 19 is moved in the X direction to a fixed position in this case, controlled the transfer gripper 12 in the Y direction / regulated and brought into the desired position.
- the movement means for the aftercooler 19 for the two coordinates X and Y for exact positioning for the transfer of the preforms 10 are controllable /.
- the transfer gripper 12 is set in each case in a fixed transfer position.
- the aftercooler 60 has a total of three movement axes, a horizontal movement axis in the Y coordinate, a vertical movement axis in the Z axis. Coordinate and a Drehaxe 63, which are coordinated by a machine control 90.
- the Drehaxe 63 serves only the discharge of the finished cooled preforms 10 on a conveyor belt 20.
- the Drehaxe 63 is mounted relative to a base plate. Movement means for the vertical movement is a vertical drive 65.
- the vertical drive 65 is slidably mounted on a base plate 66 of a horizontal drive 67.
- the horizontal drive 67 has an AC servo motor with a vertical axis.
- the base plate 66 is mounted on four sliding on two parallel slides back and forth.
- the base plate 66 has on the right side of the image a vertically upwardly directed base plate part, on which the vertical drive 65 is anchored.
- the vertical drive 65 also has an AC servo motor with a horizontal axis.
- the Nachkühl worn according to Figure 8 has a plurality of parallel rows.
- 12 cooling sleeves 21 are shown in a vertical row.
- the cooling sleeves 21 can be arranged much closer in relation to the conditions in the injection molded parts. Therefore, not only will multiple parallel rows be proposed, but additionally an offset of the rows will be proposed. This means that for a first Spritzgiesszyklus the cooling tubes numbered 1, for a second injection cycle, the cooling tubes numbered 2, etc. are referred to.
- the cooling tubes numbered 2 are referred to.
- the rows of # 1 are prepared for ejection onto the conveyor belt 20 as described. The remainder is analogous throughout the entire production period.
- FIG. 9 shows a heat profile recorded on a preform 10xx, which was created without calibration. Note the large temperature difference of 62.8 ° C to 45.7 ° C. This results in a radial temperature difference at the end of the stem of the preform of 17.1 ° C. This led to an ovalization of the outer shape in the first cooling process. This undesirable ovalization can be reduced or prevented only by a longer cooling time in the mold tool.
- the heat profile shown was measured at a cycle time of 13.5 seconds. The quality was about 0.2 mm, which is just within the tolerance limit.
- FIG. 10a shows a test example with the calibration of the preform 10xx with cooling air.
- the temperature distribution is in a much smaller range of only 3.9 ° C.
- the cycle time of 13.5 sec. was lowered to 1 1, 5 sec.
- the ovality was only 0.05 mm instead of 0.2 mm. It follows that according to the invention more precise preforms can be produced with a shorter cycle time.
- FIG. 10b shows a preform 10xx in which the external cooling according to the invention was not used.
- the calibration pressure was too high, causing it to bulge in the unsupported conical area.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Containers Having Bodies Formed In One Piece (AREA)
Abstract
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA2676615A CA2676615C (en) | 2007-01-25 | 2008-01-25 | Aftercooling apparatus and method for aftercooling preforms |
EP08708179A EP2125327A1 (de) | 2007-01-25 | 2008-01-25 | Nachkühlvorrichtung und verfahren für das nachkühlen von preformen |
CN200880003040.4A CN101588910B (zh) | 2007-01-25 | 2008-01-25 | 用于预成形坯的再冷却的再冷却装置和方法 |
MX2009006790A MX2009006790A (es) | 2007-01-25 | 2008-01-25 | Dispositivo de enfriamiento posterior y metodo para el enfriamiento posterior de preformas. |
BRPI0807856-4A2A BRPI0807856A2 (pt) | 2007-01-25 | 2008-01-25 | Dispositivo de resfriamento posterior e processo para o resfriamento posterior de pré-formas. |
JP2009546759A JP2010516507A (ja) | 2007-01-25 | 2008-01-25 | プリフォームを後冷却する装置および方法 |
US12/523,452 US20100013125A1 (en) | 2007-01-25 | 2008-01-25 | Aftercooling apparatus and method for aftercooling preforms |
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH1212007 | 2007-01-25 | ||
CH121/07 | 2007-01-25 | ||
CH759/07 | 2007-05-09 | ||
CH7592007 | 2007-05-09 | ||
CH1452/07 | 2007-09-18 | ||
CH14522007 | 2007-09-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2008090207A1 true WO2008090207A1 (de) | 2008-07-31 |
Family
ID=39325624
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2008/050840 WO2008090207A1 (de) | 2007-01-25 | 2008-01-25 | Nachkühlvorrichtung und verfahren für das nachkühlen von preformen |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP2125327A1 (de) |
JP (1) | JP2010516507A (de) |
CN (1) | CN101588910B (de) |
BR (1) | BRPI0807856A2 (de) |
CA (1) | CA2676615C (de) |
MX (1) | MX2009006790A (de) |
WO (1) | WO2008090207A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2014087257A1 (en) * | 2012-12-03 | 2014-06-12 | Sacmi Cooperativa Meccanici Imola Societa' Cooperativa | Bottling line and method |
US9790027B2 (en) | 2011-12-02 | 2017-10-17 | Sacmi Cooperativa Meccanici Imola Societa' Cooperativa | Storage system for storing objects of plastic material processed in a bottling line |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104259424B (zh) * | 2014-09-16 | 2017-01-18 | 苏州橙石铸造有限公司 | 一种用于压铸机射料装置上的自密封柱塞 |
CN106738824B (zh) * | 2016-12-19 | 2023-06-02 | 吉林经济技术开发区城发集塑管业股份有限公司 | 市政塑料检查井脱膜冷却装置及冷却方法 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0900135A1 (de) | 1996-04-18 | 1999-03-10 | SIPA S.p.A. | Verbesserung an verfahren und anlage zur herstellung von thermoplastischen vorformlingen |
WO2004041510A1 (de) | 2002-11-05 | 2004-05-21 | Netstal-Maschinen Ag | Verfahren sowie einrichtung zur nachbehandlung und kühlung von preformen |
US20050147712A1 (en) | 2002-04-10 | 2005-07-07 | Husky Injection Molding Systems Ltd. | Method and device for processing preforms |
US20050194709A1 (en) | 2003-08-22 | 2005-09-08 | Graham Packaging Company, L.P. | Modified injection takeout tube |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BR9915538A (pt) * | 1998-10-22 | 2001-08-14 | Netstal Ag Maschf Giesserei | Máquina para moldagem por injeção, assim como processo para a fabricação de peças moldadas por injeção em forma de bucha, especialmente pré- formas |
-
2008
- 2008-01-25 JP JP2009546759A patent/JP2010516507A/ja active Pending
- 2008-01-25 BR BRPI0807856-4A2A patent/BRPI0807856A2/pt not_active IP Right Cessation
- 2008-01-25 EP EP08708179A patent/EP2125327A1/de not_active Withdrawn
- 2008-01-25 CN CN200880003040.4A patent/CN101588910B/zh not_active Expired - Fee Related
- 2008-01-25 WO PCT/EP2008/050840 patent/WO2008090207A1/de active Application Filing
- 2008-01-25 MX MX2009006790A patent/MX2009006790A/es not_active Application Discontinuation
- 2008-01-25 CA CA2676615A patent/CA2676615C/en active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0900135A1 (de) | 1996-04-18 | 1999-03-10 | SIPA S.p.A. | Verbesserung an verfahren und anlage zur herstellung von thermoplastischen vorformlingen |
US20050147712A1 (en) | 2002-04-10 | 2005-07-07 | Husky Injection Molding Systems Ltd. | Method and device for processing preforms |
WO2004041510A1 (de) | 2002-11-05 | 2004-05-21 | Netstal-Maschinen Ag | Verfahren sowie einrichtung zur nachbehandlung und kühlung von preformen |
US20050194709A1 (en) | 2003-08-22 | 2005-09-08 | Graham Packaging Company, L.P. | Modified injection takeout tube |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9790027B2 (en) | 2011-12-02 | 2017-10-17 | Sacmi Cooperativa Meccanici Imola Societa' Cooperativa | Storage system for storing objects of plastic material processed in a bottling line |
US10196211B2 (en) | 2011-12-02 | 2019-02-05 | Sacmi Cooperativa Meccanici Imola Societa' Cooperativa | Storage system for storing objects of plastic material processed in a bottling line |
US10227224B2 (en) | 2011-12-02 | 2019-03-12 | Sacmi Cooperativa Meccanici Imola Societa' Cooperativa | Continuous cycle bottling line thermal conditioning structure in controlled environment |
US10773941B2 (en) | 2011-12-02 | 2020-09-15 | Sacmi Cooperativa Meccanici Imola Societa' Cooperativa | Bottling line and method |
US10822218B2 (en) | 2011-12-02 | 2020-11-03 | Sacmi Cooperativa Meccanici Imola Societa' Cooperativa | Storage system for storing objects of plastic material processed in a bottling line |
WO2014087257A1 (en) * | 2012-12-03 | 2014-06-12 | Sacmi Cooperativa Meccanici Imola Societa' Cooperativa | Bottling line and method |
Also Published As
Publication number | Publication date |
---|---|
JP2010516507A (ja) | 2010-05-20 |
CN101588910A (zh) | 2009-11-25 |
CA2676615A1 (en) | 2008-07-31 |
CN101588910B (zh) | 2014-07-30 |
EP2125327A1 (de) | 2009-12-02 |
MX2009006790A (es) | 2009-12-02 |
BRPI0807856A2 (pt) | 2014-06-17 |
CA2676615C (en) | 2014-10-14 |
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