EP2160277A2 - Dispositif et procédé pour le refroidissement secondaire de préformes - Google Patents

Dispositif et procédé pour le refroidissement secondaire de préformes

Info

Publication number
EP2160277A2
EP2160277A2 EP08773663A EP08773663A EP2160277A2 EP 2160277 A2 EP2160277 A2 EP 2160277A2 EP 08773663 A EP08773663 A EP 08773663A EP 08773663 A EP08773663 A EP 08773663A EP 2160277 A2 EP2160277 A2 EP 2160277A2
Authority
EP
European Patent Office
Prior art keywords
preforms
cooling
sleeves
air
cooled
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP08773663A
Other languages
German (de)
English (en)
Inventor
Stefan Bock
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Netstal Maschinen AG
Original Assignee
Netstal Maschinen AG
Maschinenfabrik und Giesserei Netstal AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Netstal Maschinen AG, Maschinenfabrik und Giesserei Netstal AG filed Critical Netstal Maschinen AG
Priority to EP08773663A priority Critical patent/EP2160277A2/fr
Publication of EP2160277A2 publication Critical patent/EP2160277A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • 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
    • 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
    • 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
    • B29C49/64—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
    • 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

Definitions

  • the invention further relates to a method for the aftercooling of preforms with a threaded part, a blower and a neck ring, which are at least partially post-cooled after removal from multiple forms in still hot, form unstable state in water-cooled and equipped with air blowers cooling sleeves.
  • the still hot preforms are transferred directly to the cooling sleeves of an aftercooler.
  • the aftercooler has a multiple of cooling positions in relation to the number of preforms of a Spritzgiesszyklus.
  • the preforms are opened by a light removal robot without cooling effect Removed molds, transferred to an aftercooler and cooled.
  • the robot function becomes one
  • Removal gripper split with water-cooled removal sleeves and an additional transfer gripper for transfer to the actual 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 with that, less noticed problems come to the fore. For physical reasons, the cooling within the walls of the preforms runs unevenly:
  • Preformwandung immediately thermal stresses or shrinkage stresses in the preforms and thus changes in shape.
  • any post-cooling intervention becomes extremely delicate.
  • the cooling time is a determining factor for the duration of a full cycle.
  • the first and main cooling performance still takes place in the injection molds.
  • Both injection mold halves are intensively water cooled during the injection molding process, so that the temperature of the injection molded parts can still be reduced in the form of, for example, 280 ° C at least in the outer layers to a range of about 70 ° C. It is in the outer layers very quickly below the so-called glass transition temperature of about 80 ° C.
  • the actual injection molding process up to the removal of the injection molded parts could be almost halved in the recent past. This with optimal qualities in relation to the preforms.
  • the invention is directed to the genus of Nachkühlvorraumen with water-cooled cooling sleeves.
  • the preforms must be solidified in the mold halves so strong that they can be taken over without damage from the cooling sleeves.
  • the cooling sleeves have a shape adapted to the dimensions of the injection molded parts.
  • 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 wall cross-section. The result is that seen in the material cross-section, a rapid rewarming from the inside to the outside, as soon as the intensive water cooling is interrupted.
  • Aftercooling of the preforms outside the injection mold is of great importance for two reasons: changes in shape but also surface damage, such as pressure points, etc., must be avoided during aftercooling. It must also be prevented that the cooling in the higher temperature range is too slow and set by re-heating locally harmful crystal formations.
  • the goal is a uniform amorphous state in the material of the finished preform.
  • the residual temperature of the finished preforms should be so deep that in large packing containers with thousands of loose poured molded parts at the points of contact no pressure and adhesion damage can occur.
  • the finished molded parts may not exceed a surface temperature of 55 ° C, preferably 40 ° to 50 ° C, even after a slight reheating. Aftercooling after removal of the hot, dimensionally unstable preforms from the injection mold is very important for dimensional accuracy.
  • 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 process, then they tend to settle hang down on the appropriate 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 calibration effect gives a high production and quality standard in the production of preforms, as it was not possible in the older state of the art.
  • the preforms are brought back into an exact form in this way shortly after removal from the injection molds. Any dimensional changes are reversed after the first critical handling of the injection molds in the cooling sleeves again.
  • the calibration of the preforms allows them to be taken out of molds at even higher temperatures and to achieve an even shorter injection cycle time.
  • EP 900 135 proposes a similar concept.
  • the sealing of the opening edge requires a certain compressive force and also a sufficient dimensional stability of the threaded portion.
  • the preforms In order to avoid changes in the shape of the threaded part, the preforms must be left to a higher dimensional stability in the injection molds. But this is contrary to a shortening of Spritzgiess- cycle time.
  • the present invention relates to the aftercooling of preforms which are subsequently cooled in water-cooled cooling sleeves, wherein the preforms are pushed into the cooling sleeves close to the neck ring.
  • preforms are increasingly being produced in which the blow molded part is tapered outside near the open preform side. This part is no longer supported in the cooling sleeve by thedehülsenwandung.
  • US Pat. No. 7,232,306 proposes, in the case of preforms with a tapered neck, which is no longer supported in the cooling sleeve, to blow this part by means of cooling air.
  • a sleeve or jacket sleeve is pushed like a coat over the water-cooled removal or cooling sleeve.
  • This jacket sleeve makes it possible to use the coolant water over the entire water-cooled cooling sleeve length in a twofold sense. With the inner wall of the cooling sleeve directly the outer cylindrical wall of the preform is cooled intensively.
  • the outer portion of the cooling sleeve is thereby utilized by the water simultaneously cooling the inner wall of the jacket sleeve and thus the cooling medium air, so that the tapered neck can be effectively cooled with frozen air.
  • the jacket sleeve a large number of holes is arranged, via which the cooling air is blown directly onto the tapered outer skin of the preform.
  • the invention has now the object of developing a Nachkühlmaschine and a Nachkühlvorraum, which allow a true shortening of the injection cycle time, while still ensuring all the qualitative parameters and in particular a maximum dimensional accuracy of the preforms, which also not limited to a specific type of preforms are.
  • the device according to the invention is characterized in that compressed air connections are arranged on the cooling sleeves, by way of which the outer skin, at least one region of the preforms which is unsupported in the cooling sleeve, can be cooled by using compressed expansion air under co-utilization of the expansion cooling.
  • the inventive method is characterized in that at least part of the outer open non-supporting end side of the preforms is cooled and solidified by means of compressed air using the expansion cooling of the compressed compressed air, to which compressed air of at least 1 to 2 bar is used.
  • the outer side of the open end of the preform can be solidified immediately after the transfer from the open mold halves to the cooling sleeves when the air cooling is integrated into the cooling sleeves, and in a moment in which no mechanical forces act.
  • a corresponding external cooling could immediately bring disadvantages in that the calibration would require larger air pressures.
  • the cylindrical portion of the blower immediately acts the water cooling of the cooling sleeves by direct wall contact. This showed a great success from the beginning.
  • the entire area of the neck ring should be air-cooled or solidified so far from the outside that the mechanical forces, for example from thermal stresses, can no longer cause mold damage during handling or during calibration.
  • the location of the external air cooling is preferably chosen to be approximately from the inside vis-a-vis the sealing force of the press or sealing rings.
  • the new aftercooling solution prefers the concept of a thermo-bottle closure for calibration and / or handling.
  • the delicate wall material is equal to both applications. In one case it is glass, in the other it is the still easily deformable plastic.
  • the sealing point must comply with the inventive solution can not be set with the highest precision.
  • the big advantage of the new invention is that, with full achievement of all quality criteria, a massive reduction of the entire cycle time and a corresponding increase in performance of the injection molding machine is made possible.
  • the demoulding of the preforms from the injection molds can take place earlier, in a still highly dimensionally unstable state of the preforms.
  • 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 as well as for the handling of the preforms during the aftercooling. Previous field tests have shown that with clear preforms the machine cycle time can be reduced by 15% and with dyed preforms by 20%.
  • the device is associated with a compressed air source with a pressure of at least 2 bar, preferably 4 to 8 bar.
  • a compressed air source with a pressure of at least 2 bar, preferably 4 to 8 bar.
  • compressed air of 6 bar an optimum between the energy costs and the cooling effect can be achieved.
  • the supply of compressed air to Preformaussenseite preferably takes place via an antechamber and an annular channel which is formed as an annular narrow gap. In the prechamber almost the full pressure of the compressed air source can be maintained. In the annular gap, but especially in an expanding cooling channel, the pressure of the air falls: At the same time, the temperature of the air lowers because of the expansion cold.
  • an air temperature of 10 ° to 30 ° C could be measured below zero, starting from compressed air at ambient temperature.
  • the thickness of the annular gap is selected in the tenth of a millimeter range, preferably in the range of 1 to 3 tenths of a millimeter.
  • an expanding cooling channel is formed in the flow direction from the transition point of the annular gap to the outer skin of the preform, wherein the cooling channel begins precisely directly in the transition region from the supported to the unsupported region and is directed against the outer, open end side of the preforms.
  • This is the cooling air with the lowest Temperature directed to the first, most vulnerable zone of the preform, which has the highest temperature in relation to this area. It is crucial that, despite removal of the preforms in still highly unstable soft form best preform qualities could be produced.
  • the area located on the inner wall of the cooling sleeves was compressed by means of compressed air to the inner wall of the cooling sleeves during the machine cycle duration and thereby calibrated.
  • the device has a control by means of which the air blowing device can be activated at the latest from the moment of preform transfer to the removal or cooling sleeves and during a subsequent calibration.
  • the pressure of the calibration air is allowed to swell steplessly from the beginning of the calibration.
  • the shrinkage compensation is continuously created with increasing solidification of the preform.
  • the compressed air supply is reproducibly ensured by programmed increase of the control voltage of a control valve and a corresponding increase or a corresponding increase in the calibration pressure.
  • the water-cooled removal sleeves are assigned cooling channels for a corresponding external cooling of the preforms in the transition region between the threaded part and the blower.
  • the air cooling is arranged in the region between threaded part and neck ring and / or in the transition region between neck ring and cylindrical blow part.
  • the solution according to the invention can be used in the field of aftercooling wherever there is the risk of damage due to handling as a result of thermal stresses or of calibration forces.
  • a particularly advantageous embodiment has a gripper with a plurality of nipples, each with an insertion in the preforms and the insertion of the nipples radially imposedchbare pressing or sealing rings, which are insertable into the preforms.
  • the gripper with the nipples can take on different functions:
  • the preforms can be calibrated from the open molds by means of compressed air, which is controllably guided via the nipples into the preforms, immediately after the cooling sleeves have been extended.
  • the aftercooler has four times as many cooling positions as the injection molds have mold cavities.
  • the preforms are transferred to cooling sleeves with a smaller inner diameter to compensate for the shrinkage.
  • the grippers or nipples can be used to remove the preforms from the cooling sleeves and drop them onto a conveyor belt.
  • the nipples can be introduced position-controlled to a selectable optimum sealing point in a range between threaded part and blower in the preforms. This can accommodate a wide variety of forms of transition between threaded part and blower. The best position is chosen according to the function and in case of calibration according to the specific preform type.
  • the aim is for the preform to have wall contact with the inner wall of the cooling sleeve over the largest possible period of time during after-cooling.
  • the outer wall of the entire preform blow-molded part should be in wall contact with the corresponding inner wall of the removal sleeve, except in the case of tapered sections.
  • the preforms are already introduced into the removal sleeves during the takeover by the removal sleeves until full and full inner wall contact of the entire blower part.
  • each nipple on two relatively movable pipe sections, at the end of each a retaining shoulder is firmly attached.
  • controlled adjusting means the actuating plate is moved with respect to the platform, for a simultaneous activation of all pressing or sealing rings.
  • the adjustment means have a pure support function during the calibration.
  • the Press constituting rings hold in squeezed state on the preform inside.
  • the removal of the preforms from the extraction sleeves and the transfer to the cooling sleeves of an aftercooler take place upon reaching a sufficient dimensional stability, but within the time of a Spritzgiesszyklus.
  • 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 device has an aftercooler designed as a removal robot with a multiple, in particular a 4-fold number of cooling positions with respect to the injection positions of the injection molds.
  • the preforms to be transferred hot are inserted into each free cooling positions, calibrated, cooled intensively and ejected after the final cooling.
  • the nipples can support the ejection of the ready-cooled preforms from the extraction sleeves and the transfer to a conveyor belt with controlled suction and compressed air.
  • the pressing or sealing rings can be relaxed, the pressure in the interior of the blowing parts drained, the nipple extended and held in a waiting position to repositioning the aftercooler for a new batch of preforms of the subsequent injection molding.
  • 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.
  • the device has an actuating plate, which is designed to be controllable.
  • the preforms a) can be calibrated and / or b) transposed and / or c) can be removed from the cooling sleeves after cooling has been completed, for discharge onto a conveyor belt.
  • the preforms can be changed over at least once by means of the nipples in cooling sleeves reduced by the shrinkage mass.
  • the aftercooler can be set horizontally and vertically in the correct position. Because the aftercooler is assigned at least one servo motor per axis, any movement can be performed with the highest accuracy and the next position in both axes (Y and Z) of the corresponding plane can be approached immediately.
  • the blowing of the outer end side of the preforms can during all 4 cycles, possibly with interruptions, performed, resulting in a correspondingly improved heat transfer by reheating the preform outer skin or at a higher wall temperature.
  • This embodiment with an after-cooling time of 4 injection cycles allows a wide variety of combinations of external blowing in the context of handling the preforms. Previous experience has shown that a calibration is efficient enough only in the first phase of aftercooling, since with increasing solidification of the preforms or with the cooling over the entire preform wall cross section a change in shape requires an ever greater air pressure.
  • Blowing on the outside of the open preform is an optimization issue between the cost of the compressed air and the desired dimensional stability of the open end side of the preforms. At least it may be advantageous to blow the preforms during a second cycle time at the outer open end. This is independent of whether the preform is plugged into a closer cooling sleeve and, if necessary, recalibrated. For less sensitive preforms, the calibration can be completely omitted and, for example, only the thread area can be blown. In extreme cases, the blowing air can be controlled individually for each of the staggered rows. Brief description of the invention
  • FIG. 1a shows a cooling sleeve according to the invention with water cooling as well
  • FIG. 1b shows a detail enlargement of FIG. 1a
  • 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
  • FIG. 6b shows the solution according to FIG. 6a, but the inflation pressure has been released and the sealing ring has been relieved
  • FIG. 6c shows the removal of a preform by means of the nipple in the function of a holding nipple
  • Figure 7 schematically shows an example of a first approach with an additional aftercooler
  • 8 shows schematically an example of a second approach in which the
  • 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.
  • FIGS 1a and 1b show a solution according to the invention with a cooling sleeve 1 with water cooling and air cooling of the outer skin.
  • the cooling sleeve 1 consists of an outer cooling jacket 4, which extends over the entire length of the base plate 2 to the neck ring 5 of the preform 6.
  • the cooling sleeve 1 consists essentially of the outer cooling jacket 4 and an inner cooling tube 8, which inwardly has a forward cylindrical pipe section 9 and rearwardly a hemispherical dome 10. At the dome 10, a bore 11 is mounted in the middle.
  • the preform 6 shown in FIG. 1a is a preform with a neck piece 22 conically tapered over the region 21.
  • the preform is substantially cylindrical over the region 23, and the area 24 is formed like a dome.
  • the location 20, the transition from the cylindrical region 23 to the conical region 21, is particularly important, since in the preform 6 there is a zone of highest temperature immediately after removal from the open injection molds.
  • the conically tapered neck piece 22 is not supported to the outside. This has several consequences:
  • the respective neck 22 is poorly cooled relative to the cylindrical portion.
  • the new invention therefore proposes, according to the example of Figures 1a / 1b, the neck piece 22 to cool specifically with compressed air.
  • Each cooling sleeve 1 is supplied via a short connecting piece 31 and a Druck Kunststoffzu Industriesbohrung 32 with compressed air, for example, 6 bar.
  • a steering ring 33 is inserted inside the cooling sleeve, on the open end side.
  • the steering ring 33 has a double function:
  • the cooling air is precisely guided to the points or zones, which must be primarily cooled. It is first and foremost point 20, and subsequently conical section 21, 22.
  • the compressed air is fed into an annular prechamber 34.
  • the compressed air is over a very narrow annular gap 35 of at most a few tenths of a millimeter thick in the direction of preform outer skin driven. From point 20 results in addition to the increase in air velocity, an enormous expansion cold, which is now double cooling effect
  • the geometry of the conical preform neck creates an ideal or at least approximately ideal Laval opening angle (alpha). This results in a conically enlarged in the flow direction cooling channel 36, so that even the weakest part of the neck piece 22 is optimally cooled.
  • the solution according to the invention gives a pure surface cooling of the relevant point in the first 1 to 2 seconds. This is very advantageous in that it quickly solidifies the preform surface. With the Nachhne the still stored in the Preformwandung this can be partially carried away in the course of a few seconds. After only 1 to 2 seconds, the preform neck 22 has a sufficient dimensional stability, so that during a subsequent calibration this point is no longer damaged.
  • the steering ring 33 is fixed with a Segering 37 in the cooling jacket 4. By a suitable surface treatment of the annular gap 35 directed end face 38, a precise gap size can be ensured.
  • the steering ring 33 is sealed to the outside with a 0-ring 39.
  • the compressed air supply line 30 may be a commercially available plastic pipe connection. To control the air supply, the lines of the same row [1] or [2] or [3] or [4] can be switched on via a valve. However, it is also possible to connect in large molds with 100 to 200 mold cavities in each case all treated in the same cycle rows of cooling tubes to a common valve.
  • FIG. 2a shows the direct relationship between the function of the nipples 40 as calibration nipples and the conical section 21 of a preform 6 Expression.
  • the corresponding conical outer part of the preform 6 is specifically cooled in advance immediately after removal from the open mold halves in advance and solidifies the unsupported outer wall layer within the cooling sleeve 1. This gives the entire preform 6 at the tapered transition 21 a sufficient dimensional stability.
  • the steering ring 33 is held within the head part of the cooling sleeve 1. During assembly, the steering ring 33 is inserted inside the cooling sleeve 1 from right to left. The cooling air is indicated by the arrows KL. Before the Press°.
  • FIG. 2b shows the insertion part of the nipple 40 according to FIG. 2a on a larger scale.
  • a very preferred feature is the floating storage of Press constitutive. Sealing ring 41.
  • the pressing ring 41 is held on both end sides by means of loose support rings 47.
  • the two loose support rings 47 have an inner diameter "D", which is greater by a small clearance than the outer diameter "d" of the support tube 43.
  • game "Spa" between the support ring 47 and the connector 44 is also in the longitudinal direction. So get the press or sealing ring 41 in the inactive state a freedom of movement in the sense of a slight Taumeins or swimming. It automatically results in an optimal annular sealing point, for example 45, 45 'or 45 "on the pressing or sealing ring 41st
  • FIGS. 3a and 3b show an external cooling of the preforms 6x without calibration in the non-critical transition 20 between the threaded part 7 and the blow part 23 of the preform 6.
  • Many preforms 6x have an outer conical taper 22 in this section.
  • Compressed air can be injected via an air connection 32 and discharged back into the open air via a cooling channel 36.
  • This additional cooling has the great advantage that it can be used effectively from the first moment of transfer of the preforms 6x to the cooling sleeves 1 and additionally over the entire calibration time.
  • the most striking structural difference To a "normal" cooling sleeve is that in the open mouth region, an air guide ring 33 is arranged.
  • an annular cooling channel is arranged from the point of the air connection 32 to the Abblasstelle 48 to the environment around the respective Preformteil.
  • the cooling air sweeps targeted the whole corresponding conical outer side of the preforms to the front side of the neck ring. 5
  • FIG. 4b shows yet another interesting design concept.
  • the cooling sleeve is composed of standardized components and consists of an inner cooling sleeve 52, an outer cooling sleeve 53 and a jacket sleeve 54 and a head ring 55, with which the air channels (gap Sp) are formed.
  • the inner cooling sleeve 52 is designed and a corresponding head ring 55 is placed.
  • 56 is the lowest thread, with 2 of the base 12 of an actuator plate and 18 denoted the sealing rings.
  • the cooling sleeve 6xx is designed such that after the insertion of the preforms into the cooling sleeves, a minimum gap 57 of a few tenths of a millimeter remains at the bottom part.
  • the neck ring 5 should already rest completely upon insertion on the end face of the cooling sleeve.
  • the gap can be removed with the calibration. It can, according to Figure 5a, be dispensed with in many cases in a purely cylindrical blower on an external cooling.
  • preforms 6 with a cylindrical blow-molded part may also be advantageous in the case of preforms 6 with a cylindrical blow-molded part to solidify the threaded part 7 at an early stage, so that any handling during aftercooling does not cause any damage to the thread.
  • FIG. 5b shows a preform 6xx with an enlarged diameter in the region of the open end. This preform is no longer supported in the neck ring 5 and thread in the cooling sleeve. Here it is therefore of great advantage if the outer skin of said area is solidified immediately after the transfer of the injection molds to a removal gripper with cooling air.
  • the preform is, apart from a brief interruption, immediately after the sliding from the open mold halves in the cooling sleeves 1 to
  • Figures 6a, 6b and 6c show the calibration and the removal of the preforms 6, 6x, 6xx from the sampling sleeves 1 by means of the nipple 40 in the function of a holding nipple.
  • the interior of the blower part is set to overpressure (+ mark) (FIG. 6a), or the preform 6 is sucked onto the nipple 40 (symbol) according to FIG. 6c.
  • a centering ring 61 is attached to the rear end, which fits exactly to the open end of the preform 6, for accurately holding the preforms on the nipples 40.
  • suction air is given to the closed preform end (sign) according to FIG.
  • the preform 6 goes to stop 62 to the Actuator plate 86 and can be completely removed from the removal sleeve and passed, for example, the aftercooler 89 ( Figure 7) or according to a second approach ( Figure 8) are dropped by switching to compressed air.
  • the control of the compressed air supply is shown schematically.
  • a voltage-controlled control valve 64, 65 is set via the voltage in volts by means of control 66, 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 the cooling effect of the cooling sleeve 1 adjusting shrinkage of the preform 6 and a rapid solidification of the outer skin can be achieved.
  • the preform 6 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 situation in accordance with a first embodiment with a removal robot and an aftercooler 89 separate from the withdrawal before the extraction device 81 is extended from the open mold halves 78 and 79 and the beginning of the calibration and the intensive cooling.
  • a platform 97 with the nipples 40 is already in a ready position for the transfer of the preforms
  • the platform 97 is supported via an arm 92 on a displacement device and linear guide rails on a support bracket and can be moved via a linear drive parallel to the machine axis.
  • the linear drive is anchored to the back of a tab of the support plate 74. With the activation of the linear drive, the nipples 40 are moved toward and away from the removal device 81 (as shown by the arrow).
  • the actuator plate 86 are assigned adjusting means 88, which have the only function of squeezing and relieving the pressing or sealing rings 41.
  • FIG. 7 schematically shows an injection molding machine for preforms with the following main elements: a machine bed 71 on which a support plate 74, a fixed mold clamping plate 72 and an injection unit 73 are mounted.
  • a movable platen 75 is supported axially displaceably on the machine bed 71.
  • the two plates 72 and 74 are interconnected by spars 76, which are passed through the movable platen 75.
  • a drive unit 77 Between the support plate 74 and the movable platen 75 is a drive unit 77 for generating the closing pressure.
  • the fixed platen 72 and the movable platen 75 each carry a mold half 78 or 79, between which a plurality of cavities can be formed to produce a corresponding plurality of sleeve-shaped injection molded parts.
  • the injection molded parts 6 are produced in the cavities 100 between mandrels 96 and cavities. After opening the mold halves 78 and 79, the sleeve-shaped injection-molded parts 6 adhere to the mandrels 96. The same injection-molded parts 6 in the finished cooled state are shown in the upper left corner of FIG. 7, where they are being dropped from a post-cooling device 89 onto a conveyor belt 90. The upper spars 76 are shown interrupted for the purpose of better showing the details between the open mold halves 78, 79. According to the solution according to FIG. 7, the four method steps for the injection-molded parts 6 after completion of the injection molding process correspond to a first approach:
  • Mold halves 78, 79 The still plastic parts are thereby absorbed by a lowered in the space between the open mold halves removal device 81 and raised with this in the position "B".
  • B is the phase of calibration and intensive cooling.
  • FIG. 7 shows, as it were, a snapshot of the main steps for the handling according to the first approach.
  • the transfer gripper 82 consists of a pivotable about an axis 101 platform 97, which carries an actuating plate 86, which are arranged at a parallel distance from each other.
  • the actuator plate 86 is parallel to the platform 97 via a drive or adjusting means 88 austage so that brought in the position "B” the sleeve-shaped injection molded parts 6 from the removal device 81 and pivoted in the position "C" position in the overlying Nachkühl coupled 89 can be pushed.
  • the respective transfer takes place by changing the distance "S" between the actuating plate 86 and the platform 97.
  • the still hot injection-molded parts 6 are ready-cooled in the post-cooling device 89 and ejected after a displacement of the Nachkühl responded 89 in the position "D" and on a conveyor belt 90th thrown.
  • the reference numeral 93 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 94/95 denote the air side, 94 for the injection resp. the compressed air supply and 95 for the vacuum resp. Air suction stands ( Figures 6a and 6c).
  • FIG. 7 shows a situation at the end of the injection process with opened mold halves 78 and 79, respectively.
  • the temperature of the preforms 6 was lowered in the mold with maximum cooling effect.
  • the preforms 6 may well still be dimensionally unstable, such that they could deform with immediate ejection after the mold opening with minimal external force.
  • the removal device is already in start position and can be lowered after the mold opening without time delay between the open mold halves 78, 79.
  • an independent after-cooling device 89 is used, in which the still-hot preforms 6 are completely cooled during 3 to 4 injection molding cycles.
  • a transfer gripper 82 transfers the preforms 6 to the post-cooling device 89 in the "B" / "C” phase.
  • the after-cooling of the preforms 6 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 82 carries a Pivoting movement and a linear movement in the X coordinate.
  • the transfer gripper 82 may be additionally formed with a controlled movement in the Y-coordinate.
  • the transfer gripper 82 already has a controlled movement in the X coordinate, the exact positioning of the preforms 6 located on the nipples 40 of the transfer gripper 82 in the X direction can be performed by a correspondingly controlled / regulated movement.
  • the aftercooler 89 in this case is moved in the X direction to a fixed position, the transfer gripper 82 is controlled / regulated in the Y direction and brought into the respective desired position.
  • the movement means for the aftercooler 89 for the two coordinates X and Y for exact positioning for the transfer of the preforms 6 are controllable / controllable.
  • the transfer gripper 82 is set in each case in a fixed transfer position.
  • the two mold halves 78 and 79 are in the open state according to a second embodiment, so that the whole aftercooler can enter into the free space between the mold halves.
  • the aftercooler 60 has a total of two axes of motion, a horizontal axis of movement in the Y-coordinate and a vertical axis of motion in the Z-coordinate, which can be coordinated by a machine controller 66.
  • the vertical drive 67 also has an AC servomotor with a horizontal axis.
  • the Nachkühl worn according to Figure 8 has a plurality of parallel and staggered rows [1], [2], [3], [4]. In the example shown, 12 cooling sleeves 1 are shown in a vertical row.
  • the cooling sleeves 1 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 with numbers [1], for a second injection cycle, the cooling tubes with numbers [2], etc. are called. Are in Example with four parallel rows all rows filled with No. [4], the rows are prepared with No. [1] as described. The remainder is analogous throughout the entire production period. In the example shown, the total after-cooling time corresponds to four times the injection molding time. The air pressure or negative pressure conditions in the after-cooling device 60 must be controllable in rows, so that at a certain time all rows [1] or [2], etc.
  • the visualization takes place in a command device of the machine control resp. the machine computer instead.
  • the movements can be optimized in every way. This affects, for example, start and stop, but above all accelerations and decelerations in terms of speed and distance.
  • the moving means for the vertical movement is a vertical drive 67.
  • the vertical drive 67 is slidably mounted on a base plate 68 of a horizontal drive 69.
  • the horizontal drive 69 has an AC servo motor with a vertical axis.
  • the base plate 68 is mounted on four sliding bodies on two parallel slides back and forth.
  • the base plate 68 has on the right side of the image a vertically upwardly directed base plate part, on which the vertical drive 67 is anchored.
  • the aftercooler is also a removal robot.
  • the aftercooler 60 exhibits, due to the staggered rows, a strong compression of the cooling positions with respect to the mold cavities in the injection mold.
  • the aftercooler 60 by virtue of its robot-like movement in the two directions Y and Z, can move into the correct position both with respect to the mold cavities within the open mold halves 78, 79 and with respect to the position of the nipples 40. If the aftercooler 60 has four times the number of preforms 6 per injection cycle, the actuation plate 86 with the nipples 40 can perform the function of calibrating and / or repositioning and / or removal of the preforms 6 and ejection.
  • the platform 97 has primarily a horizontal movement, this for the calibration and optionally for the Umsteckcken and the removal of the preforms 6 from the aftercooler 60.
  • the preforms 6 can be dropped onto a conveyor belt 90.
  • FIG. 9 shows a heat profile recorded on a preform 6x, 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 shaft of the preform 6 of 17.1 ° C. This leads 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.

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)

Abstract

L'invention concerne un dispositif et un procédé pour le refroidissement secondaire de préformes (6) extraites sous forme instable d'un outil de moulage par injection à moules multiples. L'invention propose un refroidissement par air intégré dans les manchons de refroidissement (1) refroidis par eau pour la face externe de l'extrémité ouverte de la préforme (6). Il est possible, notamment pour des types spécifiques de préformes, de refroidir du début du transfert des moules ouverts (78, 79) aux manchons d'extraction ou de refroidissement (1) les zones qui ne sont pas soutenues dans les manchons de refroidissement (1) à l'extérieur grâce au froid produit par la détente d'air comprimé. Cette nouvelle solution permet de garantir une qualité optimale, notamment aussi en ce qui concerne la stabilité dimensionnelle et l'absence de points de pression dus à la sollicitation lors d'un calibrage dans les manchons de refroidissement (1) ainsi que lors du maniement dans la zone de refroidissement secondaire.
EP08773663A 2007-06-25 2008-06-25 Dispositif et procédé pour le refroidissement secondaire de préformes Withdrawn EP2160277A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP08773663A EP2160277A2 (fr) 2007-06-25 2008-06-25 Dispositif et procédé pour le refroidissement secondaire de préformes

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
CH10152007 2007-06-25
CH14522007 2007-09-18
EP08050840 2008-01-25
EP08773663A EP2160277A2 (fr) 2007-06-25 2008-06-25 Dispositif et procédé pour le refroidissement secondaire de préformes
PCT/EP2008/005166 WO2009000525A2 (fr) 2007-06-25 2008-06-25 Dispositif et procédé pour le refroidissement secondaire de préformes

Publications (1)

Publication Number Publication Date
EP2160277A2 true EP2160277A2 (fr) 2010-03-10

Family

ID=39952303

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08773663A Withdrawn EP2160277A2 (fr) 2007-06-25 2008-06-25 Dispositif et procédé pour le refroidissement secondaire de préformes

Country Status (2)

Country Link
EP (1) EP2160277A2 (fr)
WO (1) WO2009000525A2 (fr)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202007002285U1 (de) * 2006-06-29 2007-05-24 Netstal-Maschinen Ag Vorrichtung zur Kalibration von Preformen

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1289373B1 (it) 1996-04-18 1998-10-02 Sipa Spa Procedimento e impianto perfezionato per la produzione di preforme in resina termoplastica
CA2454744C (fr) 2001-07-27 2010-10-19 Netstal-Maschinen Ag Dispositif destine a la realisation discontinue de preformes
DE10215722B4 (de) * 2002-04-10 2009-11-26 Husky Injection Molding Systems Ltd., Bolton Verfahren und Vorrichtung zur Bearbeitung von Vorformlingen
WO2004041510A1 (fr) 2002-11-05 2004-05-21 Netstal-Maschinen Ag Procede et dispositif pour le traitement ulterieur et le refroidissement de preformes
US7232306B2 (en) * 2003-08-22 2007-06-19 Graham Packaging Company, Lp Modified injection takeout tube
DE102005029793B4 (de) 2005-06-27 2007-04-26 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Vliesstoffe, Verfahren zu deren Herstellung sowie deren Verwendung

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202007002285U1 (de) * 2006-06-29 2007-05-24 Netstal-Maschinen Ag Vorrichtung zur Kalibration von Preformen

Also Published As

Publication number Publication date
WO2009000525A2 (fr) 2008-12-31
WO2009000525A3 (fr) 2009-02-19

Similar Documents

Publication Publication Date Title
EP2468474B1 (fr) Dispositif auxiliaire de post-traitement de préformes
EP1558434B1 (fr) Procede et dispositif pour le traitement ulterieur et le refroidissement de preformes
EP1123189B2 (fr) Machine de moulage par injection et procede de production de pieces moulees par injection en forme d'enveloppes, notamment de preformes
EP2817130B1 (fr) Procédé et dispositif de fabrication de préformes à fond présentant un profil optimisé
DE2522884A1 (de) Verfahren und vorrichtung zur herstellung orientierter hohlkoerper aus kunststoff
DE102009030762B4 (de) Verfahren und Vorrichtung zur Herstellung von Preformen mit Spezialgeometrien
DE2166733A1 (de) Spritz- blas-formwerkzeug fuer eine kunststoff-spritzgussmaschine
EP2113368A2 (fr) Dispositif de formage par soufflage
EP3016793B1 (fr) Procédé et dispositif de réalisation d'un profil de fond optimisé sur des préformes
EP2125327A1 (fr) Dispositif de refroidissement secondaire et procédé pour le refroidissement secondaire de préformes
DE202007002285U1 (de) Vorrichtung zur Kalibration von Preformen
EP2160277A2 (fr) Dispositif et procédé pour le refroidissement secondaire de préformes
EP3197655A1 (fr) Procédé et dispositif pour réaliser un contour de col optimisé sur des préformes
DE2504740A1 (de) Vorrichtung und verfahren zur herstellung von zweiachsig ausgerichteten gegenstaenden durch blasformen
WO2007063063A1 (fr) Procede de post-traitement et dispositif approprie
EP1297942A2 (fr) Dispositif pour la manipulation de récipients moulés par étirage soufflage utilisant une roue de transfert,où un moyen de retenue est orientable par apport à unbras de support et contrôlé par une came
DE202018104724U1 (de) Zur Herstellung der griffhaltigen Flaschenkörper geeignete Blasformmaschine
DE2922195A1 (de) Vorrichtung zur herstellung von kunststoffhohlkoerpern
DE3819129A1 (de) Verfahren zur herstellung von kunststoff-flaschen sowie extrusions-blasformmaschine zur durchfuehrung des verfahrens
DE3039741A1 (de) Vorrichtung zum formen von im wesentlichen rohrfoermigen kunststoff-vorformlingen

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20100125

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA MK RS

17Q First examination report despatched

Effective date: 20100610

DAX Request for extension of the european patent (deleted)
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20151208