WO2014068080A1 - Système de moulage par soufflage avec étirage comprenant actionnement simultané de valve de présoufflage - Google Patents

Système de moulage par soufflage avec étirage comprenant actionnement simultané de valve de présoufflage Download PDF

Info

Publication number
WO2014068080A1
WO2014068080A1 PCT/EP2013/072859 EP2013072859W WO2014068080A1 WO 2014068080 A1 WO2014068080 A1 WO 2014068080A1 EP 2013072859 W EP2013072859 W EP 2013072859W WO 2014068080 A1 WO2014068080 A1 WO 2014068080A1
Authority
WO
WIPO (PCT)
Prior art keywords
blowing
valve
pressure
preform
actuating
Prior art date
Application number
PCT/EP2013/072859
Other languages
English (en)
Other versions
WO2014068080A9 (fr
Inventor
Othmar Rymann
Original Assignee
Norgren Gmbh
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 Norgren Gmbh filed Critical Norgren Gmbh
Publication of WO2014068080A1 publication Critical patent/WO2014068080A1/fr
Publication of WO2014068080A9 publication Critical patent/WO2014068080A9/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/4289—Valve constructions or configurations, e.g. arranged to reduce blowing fluid consumption
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/78—Measuring, controlling or regulating
    • B29C49/783—Measuring, controlling or regulating blowing pressure
    • B29C2049/7832—Blowing with two or more pressure levels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/78—Measuring, controlling or regulating
    • B29C49/783—Measuring, controlling or regulating blowing pressure
    • B29C2049/7832—Blowing with two or more pressure levels
    • B29C2049/7833—Blowing with three or more pressure levels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/78—Measuring, controlling or regulating
    • B29C49/783—Measuring, controlling or regulating blowing pressure
    • B29C2049/7834—Pressure increase speed, e.g. dependent on stretch or position
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/08—Biaxial stretching during blow-moulding
    • B29C49/10—Biaxial stretching during blow-moulding using mechanical means for prestretching
    • B29C49/12—Stretching rods
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/08—Biaxial stretching during blow-moulding
    • B29C49/10—Biaxial stretching during blow-moulding using mechanical means for prestretching
    • B29C49/122—Drive means therefor
    • B29C49/1222—Pneumatic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/08—Biaxial stretching during blow-moulding
    • B29C49/10—Biaxial stretching during blow-moulding using mechanical means for prestretching
    • B29C49/122—Drive means therefor
    • B29C49/123—Electric drives, e.g. linear motors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/4236—Drive means
    • B29C49/42362—Electric drive means, e.g. servomotors
    • 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
    • B29C49/4236—Drive means
    • B29C49/4237—Pneumatic drive means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/78—Measuring, controlling or regulating
    • B29C49/783—Measuring, controlling or regulating blowing pressure

Definitions

  • the embodiments described below relate to, stretch blow molding, and more particularly, to a stretch blow molding system that actuates multiple pre-blowing valves simultaneously.
  • Blow molding is a generally known process for molding a preform part into a desired product.
  • the preform is in the general shape of a tube with an opening at one end for the introduction of pressurized gas, typically air; however, other gases may be used.
  • pressurized gas typically air
  • other gases may be used.
  • One specific type of blow molding is stretch blow molding (SBM).
  • SBM stretch blow molding
  • a valve block provides both low and high-pressure gas to expand the preform into a mold cavity.
  • the mold cavity comprises the outer shape of the desired product.
  • SBM can be used in a wide variety of applications; however, one of the most widely used applications is in the production of Polyethylene terephthalate (PET) products, such as drinking bottles.
  • PET Polyethylene terephthalate
  • the SBM process uses a low-pressure fluid supply along with a stretch rod that is inserted into the preform to stretch the preform in a longitudinal direction and radially outward and then uses a high-pressure fluid supply to expand the preform into the mold cavity.
  • the low-pressure fluid supply along with the stretch rod is typically referred to as a pre-blowing phase of the molding cycle.
  • the high-pressure fluid supply that expands the preform into the mold cavity is typically referred to as the blowing phase of the molding cycle.
  • the low-pressure and high-pressure fluid supplies can be controlled using blow-mold valves.
  • the resulting product is generally hollow with an exterior shape conforming to the shape of the mold cavity.
  • the gas in the preform is then exhausted through one or more exhaust valves. This process is repeated during each blow molding cycle.
  • FIG. la shows a prior art blow molding valve block assembly 100.
  • the prior art blow molding valve block assembly 100 includes a valve block 102, a stretch rod 104, control chambers 106a-106d, operating chamber rings 108a-108d, valve pistons 110a- HOd, and pilot valves 112.
  • the stretch rod 104 extends vertically through the central chamber 101 and out the bottom of the valve block 102.
  • the valve block 102 includes four sets of valves that are vertically stacked in the central chamber 101 and around the stretch rod 104.
  • the four sets of valves may correspond to a pre-blowing valve, a blowing valve, an air recovery valve, and an exhaust valve.
  • a pilot air supply is provided by the pilot valves 112 in order to control the position of each valve piston HOa-l lOd.
  • the valve pistons 110a and 110b are shown in the open position with the valve pistons 110c and 1 lOd in the closed position.
  • the valve block 102 also includes a number of inlet and outlet ports 114, 116, and 118.
  • the valve pistons are controlled using the various pilot valves 112 in order to direct the flow of pressurized gas through the valve block 102.
  • at least one additional valve or an electric motor is required to control the position of the stretch rod 104.
  • One of the more critical steps in the molding process occurs during the pre- blowing phase.
  • a pressure up to approximately 12 bar 174 psi
  • the stretch rod 104 simultaneously extends the preform in a longitudinal direction.
  • the supply of air during the pre-blowing phase can be seen between times ti in FIG. lb.
  • this pre-blowing phase there is an attempt to substantially uniformly distribute the material of the preform along the longitudinal length prior to expansion of the preform against the mold cavity. Due to the relatively abrupt supply of air to the preform, uniform distribution of the material is not always possible.
  • the pressure rapidly increases without adequate control.
  • manufacturers typically provide excess thickness to the preform in order to account for variations in the distribution of the preform during the molding cycle. The excess material allows even the thin areas to satisfy the minimum thickness requirements once the high pressure air is supplied during the blowing phase.
  • the pre-blowing valve is closed and the blowing valve is opened, which provides the blowing pressure to the stretched preform.
  • This phase can be seen between times t ! and t 2 in FIG. lb.
  • the blowing valve is closed and the air-recovery valve can be opened.
  • This phase can be seen between times t 2 and t 3 .
  • a portion of the blowing pressure can be recovered for later use. For example, the blowing pressure may be reused for the next pre-blowing phase.
  • the exhaust valve is opened to exhaust the remaining pressure from the formed product.
  • one prior art solution is to use a single proportional valve for providing the air to the preform.
  • a single proportional valve for providing the air to the preform.
  • Such an approach is outlined in WO/2011/154326, which is assigned on its face to the present applicants.
  • Proportional valves are generally known in the art and can operate to open a port of the valve at virtually any point between fully open and fully closed. Therefore, rather than simple on/off operation as in traditional valves, proportional valves are capable of maintaining an actuation state between fully on and fully off.
  • the approach proposed by the '326 application provides adequate proportional control in some situations, the use of a single proportional valve for the pre-blowing and the blowing pressure has serious drawbacks.
  • the pre-blowing pressure is typically around 1-12 bar (14.5 psi - 174 psi). However, the blowing pressure typically reaches around 40 bar (580 psi).
  • the valve in order to use a single proportional valve, the valve must be able to accommodate the high flow rate/pressure of the blowing phase. This results in the proportional valve being oversized for the pre-blowing phase. For example, while the proportional valve would only need a nominal diameter of approximately 8 mm (0.3 in.) for the pre-blowing pressure, the proportional valve is required to have a nominal diameter of approximately 16-20 mm (0.6-0.8 in.) to accommodate the much higher blowing pressure and flow volume.
  • the increased size of the proportional valve results in increased difficulty in controlling the pressure during the pre-blowing phase and excessive frictional losses as thicker and stronger seals are required to provide fluid- tight sealing for the 40 bar (580 psi) pressure.
  • the large valves are subject to premature failure.
  • accurate proportional control of the valve during the pre-blowing phase becomes difficult.
  • pre-blowing valve module with two or more valves that are actuated in series or simultaneously to achieve a unique pre-blowing pressure curve that can include rapid increases in pressure, rapid decreases in pressure, or stabilized pressure.
  • the changes in pressure will depend on the particular shape of the desired product.
  • a method for stretch blow molding a preform in a mold cavity is provided according to an embodiment.
  • the mold cavity is coupled to a stretch blow molding system including a cylinder, a piston movable within the cylinder and a stretch rod coupled to the piston.
  • the method comprises steps of actuating a first pre-blowing valve from a first position to a second position to supply a first pre-blowing pressure to the preform at a first pressure and a first flow rate and determining a stretch rod position and/or an elapsed time.
  • the method further comprises a step of actuating at least a second pre-blowing valve from a first position to a second position based on the determined stretch rod position and/or the elapsed time to supply a second pre-blowing pressure to the preform at a second pressure and/or a second flow rate or exhaust pressure from the preform while the first pre-blowing valve remains actuated to the second position.
  • a method for stretch blow molding a preform in a mold cavity is provided according to an embodiment.
  • the mold cavity is coupled to a stretch blow molding system including a cylinder, a piston movable within the cylinder and a stretch rod coupled to the piston.
  • the method comprises a step of actuating a first pre-blowing valve from a first position to a second position to supply a first pre-blowing pressure to the preform at a first pressure and a first flow rate.
  • the method comprises a step of actuating a second pre-blowing valve from a first position to a second position to supply a second pre-blowing pressure to the preform at a second pressure and/or a second flow rate or exhaust pressure from the preform.
  • the method further comprises steps of moving the stretch rod out of the cylinder to stretch the preform in a longitudinal direction and actuating a blowing valve to a first position to supply a blowing pressure to the preform.
  • the method further comprises a step of moving the stretch rod out of the cylinder to stretch the preform in a longitudinal direction.
  • the steps of actuating the first pre-blowing valve and moving the stretch rod occur substantially simultaneously.
  • the method further comprises a step of actuating a blowing valve to a first position to supply a blowing pressure to the preform.
  • the first pre-blowing pressure is lower than the blowing pressure.
  • the second pre-blowing pressure is lower than the blowing pressure.
  • the second pre-blowing pressure is substantially equal to the blowing pressure.
  • the step of actuating the second pre-blowing valve supplies the second pre-blowing pressure to the preform and wherein the method further comprises a step of actuating a third pre-blowing valve to at least partially exhaust the preform.
  • the step of actuating the third pre-blowing valve occurs while at least one of the first or second pre-blowing valves remains actuated.
  • the method further comprises a step of actuating an air recovery valve to recover a portion of the pressure supplied to the preform.
  • the method further comprises a step of actuating an exhaust valve to exhaust the pressure supplied to the preform.
  • the steps of actuating the first pre-blowing valve and moving the stretch rod occur substantially simultaneously.
  • actuation of the second pre-blowing valve is based on a stretch rod position and/or an elapsed time.
  • the first pre-blowing pressure is lower than the blowing pressure.
  • the second pre-blowing pressure is lower than the blowing pressure.
  • the second pre-blowing pressure is substantially equal to the blowing pressure.
  • actuating the second pre-blowing valve supplies the second pre- blowing pressure to the preform and the method further comprises a step of actuating a third pre-blowing valve to at least partially exhaust the preform.
  • the step of actuating the third pre-blowing valve occurs while at least one of the first or second pre-blowing valves remains actuated.
  • the method further comprises a step of actuating an air recovery valve to recover a portion of the pressure supplied to the preform.
  • the method further comprises a step of actuating an exhaust valve to exhaust the pressure supplied to the preform.
  • FIG. la shows a prior art blow molding valve block assembly.
  • FIG. lb shows a pressure versus time profile for a typical blowing operation according to the prior art.
  • FIG. 2 shows a stretch blow molding system according to an embodiment.
  • FIG. 3 shows a stretch blow molding system according to another embodiment.
  • FIG. 4 shows a pressure versus time profile for a blowing operation using a pre- blowing valve module according to an embodiment.
  • FIGS. 2 - 4 and the following description depict specific examples to teach those skilled in the art how to make and use the best mode of embodiments of a blow molding system.
  • some conventional aspects have been simplified or omitted.
  • Those skilled in the art will appreciate variations from these examples that fall within the scope of the present description.
  • Those skilled in the art will appreciate that the features described below can be combined in various ways to form multiple variations of the blow molding system. As a result, the embodiments described below are not limited to the specific examples described below, but only by the claims and their equivalents.
  • FIG. 2 shows a cross-sectional view of the stretch blow molding system 200 according to an embodiment.
  • the stretch blow molding system 200 can include a cylinder 201, a stretch rod 202, a stretch rod control valve 203, and a plurality of blow- mold valves 214, 215, 216, 224, 234, 244. While valves 203, 214, 215, 216, 224, 234, and 244 are shown schematically and remote from the cylinder 201, in some embodiments, the valves may be coupled to the cylinder 201. Further, it should be appreciated that while electrical cabling is not shown in FIG.
  • the valves 203, 214, 215, 216, 224, 234, 244 can be connected to appropriate electronics to control actuation of the valves.
  • the valves may be controlled mechanically or with a pilot pressure, for example. Therefore, the valves should not be limited to electronic control.
  • the cylinder 201 is adapted to form a substantially fluid-tight seal with a mold cavity 205.
  • the cylinder 201 is adapted to form a substantially fluid-tight seal with the preform 211, which is positioned partially in the mold cavity 205 and in fluid communication with the blow-mold valves 214, 215, 216, 224, 234, 244 in FIG. 2.
  • a portion of the preform 211 is shown outside of the mold cavity 205 and coupled to the cylinder 201.
  • the cylinder 201 may be coupled to the mold cavity 205 and the entire preform 211 may be positioned within the mold cavity 205.
  • the mold cavity 205 may be provided as a separate component by an end user, for example, and may not form part of the stretch blow molding system 200. Therefore, the stretch blow molding system 200 may be adapted to couple numerous different types of mold cavities 205 and preforms 211.
  • the stretch rod control valve 203 is in fluid communication with a first port 221 and a second port 222 formed in the cylinder 201.
  • a piston 212 separates the cylinder 201 into a first chamber 231 and a second chamber 232.
  • the piston 212 is coupled to the stretch rod 202.
  • the piston 212 and stretch rod 202 may be movable within the cylinder 201.
  • the piston 212 may include a sealing member 213, which can provide a substantially fluid- tight seal between the piston 212 and the cylinder 201.
  • the cylinder 201 can include additional sealing members 250, 251, 252, which form substantially fluid-tight seals with the stretch rod 202.
  • the sealing members 213 and 250-252 can prevent pressurized fluid from passing between chambers 231, 232 or from the second chamber 232 to the mold cavity 205.
  • the first port 221 is in fluid communication with the first chamber 231 and the second port 222 is in fluid communication with the second chamber 232.
  • the first chamber 231 is pressurized thereby actuating the piston 212 and thus, the stretch rod 202 in a first direction.
  • the second chamber 232 is pressurized, which actuates the piston 212 and thus, the stretch rod 202 in a second direction, substantially opposite the first direction.
  • a position sensor 230 which comprises a first sensor portion 230a coupled to the cylinder 201 and a second sensor portion 230b coupled to the piston 302.
  • the first sensor portion 230a may be in electrical communication with the stretch rod control valve 203 via a cable (not shown).
  • the first portion of the position sensor 230 may comprise one or more magnetic sensors 230a while the second portion comprises a magnet 230b.
  • One example of a position sensor that may be used with the present embodiment is disclosed in United States Patent 7,263,781, which is assigned to the applicants of the present application. However, it should be appreciated that other position sensors may certainly be utilized with the present embodiment without departing from the scope of the embodiment.
  • the stretch rod control valve 203 can comprise a proportional valve.
  • the stretch rod control valve 203 does not have to comprise a proportional valve and other types of valves may be used.
  • the stretch rod control valve 203 comprises a 5/3-way proportional valve.
  • the stretch rod control valve 203 may comprise a 5/3-way spool valve, for example.
  • the stretch rod control valve 203 comprises a solenoid-actuated spool valve.
  • a spring 265 ' or other biasing member may be provided to de-actuate the valve 203 or bring the valve 203 to a default position.
  • a second solenoid (not shown) may be provided.
  • the stretch rod control valve 203 in a de-actuated position, the stretch rod control valve 203 is closed.
  • pressurized fluid is not provided to or exhausted from the first or second chambers 231, 232.
  • a solenoid 265 may be used to open the stretch rod control valve 203 towards one or more actuated positions. Further, in embodiments where the stretch rod control valve 203 comprises a proportional valve, the solenoid 265 may be used to actuate the valve 203 to positions between a de-actuated position and a fully actuated position based on the set point signal provided to the solenoid 265. As mentioned briefly above, the set point signal may be provided by a processing system (not shown) according to the desired operating parameters. According to an embodiment, when the solenoid 265 actuates the stretch rod control valve 203 to a first actuated position, pressurized fluid is provided from a first port 203a to a second port 203b.
  • the first port 203a is adapted to receive a pressurized fluid.
  • the first port 203 a is shown in fluid communication with the pressurized fluid source 263 while the second port 203b is in fluid communication with the first port 221 formed in the cylinder 201 via fluid pathway 241.
  • the first port 203a is selectively in fluid communication with the second port 203b when the stretch rod control valve 203 is opened towards the first actuated position.
  • pressurized fluid can be exhausted from the third fluid port 203c to the fourth fluid port 203d. Therefore, as the stretch rod control valve 203 is actuated towards the first actuated position, pressurized fluid is supplied from the pressurized fluid source 263 to the first chamber 331 and exhausted from the second chamber 232.
  • the stretch rod control valve 203 when the stretch rod control valve 203 is partially opened and between the de-actuated position and the first actuated position, the fluid communication path between the first port 203a and the second port 203b is only partially opened.
  • the pressure provided to the first port 203a of the stretch rod control valve 203 from the pressurized fluid source 263 and delivered to the second port 230b of the stretch rod control valve 203 is limited.
  • the fluid communication path between the third port 203 c and the fourth port 203d prior to fully reaching the first actuated position, the fluid communication path between the third port 203 c and the fourth port 203d is not fully opened and therefore, the fluid exhausted from the second chamber 232 is limited.
  • the stretch rod control valve 203 can be actuated to a position between the de-actuated position and the first actuated position and only partially opened.
  • the stretch rod control valve 203 when the stretch rod control valve 203 is actuated and opened towards a second actuated position, the first port 203a is brought into fluid communication with the third port 203c and the second port 203b is brought into fluid communication with the fifth port 203 e, which comprises an exhaust. Therefore, when the stretch rod control valve is opened towards the second actuated position, the stretch rod control valve 203 provides pressurized fluid to the second chamber 232 and exhausts the first chamber 231 to move the piston 202 and thus, the stretch rod 202 in a second longitudinal direction. It should be appreciated that less than the full pressure provided to the first port 203a is delivered to the third port 203c prior to the stretch rod control valve 203 fully reaching the second actuated position.
  • FIG. 3 shows a cross-sectional view of the stretch blow molding system 200 according to another embodiment.
  • the stretch rod control valve 203 is replaced with an electric linear motor 300.
  • Electric linear motors are generally known in the art such as provided by LinMot®. The particular motor used should in no way limit the scope of the present embodiment.
  • the electric linear motor 300 can supply the position and speed information to the processing system (not shown). Therefore, the position sensor 230 can be omitted in some embodiments using the electric linear motor.
  • an additional valve 330 is provided.
  • the valve 330 can control the positioning of cylinder 201 with respect to the mold cavity 205.
  • the valve 330 is shown as being controlled with two solenoids 331, 332; however, the valve 330 may be controlled using other means.
  • the valve 330 comprises a 5/2-way valve; however, other types of valves may be utilized without departing from the scope of the present embodiment.
  • a first fluid port 330a when the valve 330 is in a first position, a first fluid port 330a is brought into fluid communication with a second fluid port 330b.
  • the first fluid port 330a is in fluid communication with a pressurized fluid source 333 while the second fluid port 330b is in fluid communication with a fluid chamber 334 via the fluid pathway 335.
  • a third fluid port 330c is brought into fluid communication with a fourth fluid port 330d.
  • the third fluid port 330c is in fluid communication with a second fluid chamber 336 via a fluid pathway 337. Therefore, when the valve 330 is in the first position, the fluid chamber 334 is pressurized while the second fluid chamber 336 is exhausted.
  • the valve 330 when the valve 330 is in a second position, the first fluid port 330a is brought into fluid communication with the third fluid port 330c while the second fluid port 330b is brought into fluid communication with a fifth fluid port 330e. Therefore, in the second position, the fluid chamber 336 is pressurized while the fluid chamber 334 is exhausted. Consequently, based on the actuation of the valve 330, the cylinder 201 can be brought towards or away from the mold cavity 205.
  • FIGS. 2 & 3 there are the various blow-mold valves 214, 215, 216, 224, 234, and 244.
  • the blow mold valves 224, 234, 244 comprise a portion of a pre-blowing valve module 204.
  • the pre-blowing valve module 204 can utilize a plurality of valves 224, 234, 244 to accurately control the pressure supplied to the preform 211 during the pre-blowing phase.
  • the pre-blowing valve module 204 can replace the prior art proportional pre-blowing valve described above.
  • the proportional pre-blowing valve requires expensive electronic circuitry, which is very sensitive and difficult to achieve repeatable results
  • the pre-blowing valve module 204 is cheaper, more repeatable, and can provide similar pressure control by actuating two or more pre-blowing valves 224, 234, 244 simultaneously.
  • the pre-blowing valve module 204 comprises three 2/2-way valves 224, 234, 244.
  • the pre-blowing valve module 204 may comprise two or more valves of various configurations and thus, the claims that follow should in no way be limited to the particular configuration shown in the figures.
  • the pre- blowing valves 224, 234, 244 comprise typical on/off valves rather than proportional valves. Therefore, the pre-blowing valves 224, 234, 244 of the pre-blowing valve module 204 can be operated using cheaper and simpler electronics than required for proportional valves. Further, control of on/off type valves is easier and more repeatable than controlling actuation of proportional valves.
  • the pre- blowing valves 224, 234, 244 may be provided in a single housing, as indicated by the dashed lines, that comprises a port 225, 235, 245 for each of the pre-blowing valves 224, 234, 244 and a common port 255.
  • the common port 255 can be in fluid communication with the fluid pathway 243, which leads to the preform 211 via a third port 223 formed in the cylinder 201 and the opening 208 between the stretch rod 202 and the preform 211.
  • the first pre-blowing valve 224 comprises a first fluid port 224a and a second fluid port 224b, which are selectively in fluid communication with one another.
  • the first fluid port 224a is in fluid communication with a pressurized fluid source 226 via fluid line 227.
  • a throttle 228 can be provided, which can limit the flow rate of the fluid to the first pre- blowing valve 224.
  • the throttle 228 could be positioned at the outlet of the first pre-blowing valve 224 to limit the flow rate of the fluid out of the first pre-blowing valve 224.
  • the first pre-blowing valve 224 can be biased to a first (neutral) position using a biasing member 264.
  • the first pre-blowing valve 224 can be actuated to a second position using a solenoid 266 or some other type of actuator, such as a fluid or mechanical actuator.
  • a solenoid 266 or some other type of actuator, such as a fluid or mechanical actuator.
  • the first pre-blowing valve 224 can supply pressurized fluid from the pressurized fluid source 226 to the preform 211.
  • the fluid is supplied to the preform 211 at a first pressure and a flow rate, which is dependent upon the size of the valve 224, the pressure of the pressurized fluid source 226, and the throttle 228 (when included).
  • the second pre-blowing valve 234 comprises a first fluid port 234a and a second fluid port 234b, which are selectively in fluid communication with one another.
  • the first fluid port 234a is in fluid communication with a pressurized fluid source 236 via fluid line 237.
  • a throttle 238 can be provided, which can limit the flow rate of the fluid to the second pre- blowing valve 234.
  • the throttle 238 could be positioned at the outlet of the second valve 234 to limit the flow rate of the fluid out of the second pre- blowing valve 234.
  • the second pre-blowing valve 234 can be biased to a first position using a biasing member 274.
  • the second pre-blowing valve 234 can be actuated to a second position using a solenoid 275 or some other type of actuator, such as a fluid or mechanical actuator.
  • a solenoid 275 or some other type of actuator, such as a fluid or mechanical actuator.
  • the second pre-blowing valve 234 can supply pressurized fluid from the pressurized fluid source 236 to the preform 211.
  • the fluid is supplied to the preform 211 at a second pressure and/or a second flow rate, which is dependent upon the size of the valve 234, the pressure of the pressurized fluid source 236, and the throttle 238 (when included).
  • the pressurized fluid source 236 may be at a higher pressure than the pressurized fluid source 226.
  • the pressurized fluid source 236 may be at a blowing pressure as described in more detail below in relation to the pressurized fluid source 284.
  • the two pressurized fluid sources 236, 284 are shown as comprising different sources, in some embodiments, they may comprise a common pressurized fluid source. With the pressurized fluid source 236 at a higher pressure than the pressurized fluid source 226 and all other things being equal, the flow to the preform 211 will be faster from the second pre-blowing valve 234 than from the first pre-blowing valve 224. This can create steeper boost effect in pressurizing the preform 211.
  • the throttles 228, 238 may be set to substantially equal orifice openings or may comprise different sized openings. The size of the openings can be adjusted to obtain desired flow rates when one or both of the pre-blowing valves 224, 234 are opened.
  • the pressurized fluid sources 226, 236 may be at substantially equal pressures; however, the throttles 228, 238 may restrict the flow by different amounts.
  • the throttle 228 may limit the flow to a greater degree than the throttle 238. Therefore, even with equal pressurized fluid sources 226, 236, the second pre-blowing valve 234 can still provide the fluid to the preform 211 at a faster rate.
  • the throttle 228 and the throttle 238 may be set to substantially equal openings. Therefore, it should be appreciated, that the second pre- blowing valve 234 can supply the preform 211 with pressure at a different pressure and/or flow rate than the first pre-blowing valve 224.
  • the third pre-blowing valve 244 comprises a first fluid port 244a and a second fluid port 244b, which are selectively in fluid communication with one another.
  • the first fluid port 244a is in fluid communication with an exhaust 246 via fluid line 247.
  • a throttle 248 can be provided, which can limit the flow rate of the fluid exhausting through the third pre- blowing valve 244. While the throttle 248 is shown at the outlet of the valve 244, in other embodiments, the throttle 248 can be positioned at the inlet.
  • the third pre-blowing valve 244 can be biased to a first position using a biasing member 295.
  • the third pre-blowing valve 244 can be actuated to a second position using a solenoid 285 or some other type of actuator, such as a fluid or mechanical actuator.
  • a solenoid 285 or some other type of actuator such as a fluid or mechanical actuator.
  • the third pre-blowing valve 244 can exhaust pressurized fluid from the preform 211.
  • the fluid can be exhausted from the preform 211 at a flow rate, which is dependent upon the size of the valve 244, the pressure of the preform 211, and the throttle 248 (when included).
  • the third pre-blowing valve 244 allows the preform 211 to be exhausted, or at least partially exhausted, even during the pre-blowing phase. Therefore, the pressure of the preform 211 can decrease during the pre-blowing phase. As discussed in greater detail below, this may be desirable if the diameter of the mold cavity 205 decreases, such as shown at d 3 , for example.
  • the pre-blowing valves 224, 234, 244 may be actuated individually during some portions of the pre-blowing phase and two or more of the pre-blowing valves 224, 234, 244 may be actuated simultaneously during other portions of the pre-blowing phase. Actuating two or more of the pre-blowing valves 224, 234, 244 simultaneously can create jumps in the pressure (increasing or decreasing), or can flatten the pressure so the pressure in the preform 211 stops increasing or decreasing and rather, remains constant for a predetermined amount of time or through a predetermined stretch rod position.
  • the two or more pre-blowing valves 224, 234, 244 of the pre-blowing valve module 204 can be used to pressurize the preform 211 to a predetermined pressure while the stretch rod 202 extends in the longitudinal direction using the valve 203, for example.
  • the use of multiple valves rather than a single pre- blowing valve allows the pressure supplied to the preform 211 to be more accurately controlled.
  • the actuation of the pre-blowing valve module 204 can be controlled based on a stretch rod position as determined by the position sensor 230 or by the electric linear motor 300.
  • the actuation of the pre-blowing valve module 204 can be controlled based on an actuation/elapsed time.
  • the various pre-blowing valves 224, 234, 244 can be actuated in various combinations for predetermined lengths of time.
  • the elapsed time may be based on an elapsed time since the start of the blowing cycle or an elapsed time since the first pre- blowing valve 224 is actuated.
  • the particular reference time base used should in no way limit the scope of the present embodiment.
  • An example pressure curve is shown in FIG. 4.
  • the pressure can be adjusted during the pre-blowing phase, which is represented between times to and As can be seen by curve c l s in one embodiment, the pressure supplied to the preform 211 during the pre-blowing phase can be delivered in a step-wise function.
  • the stepped delivery is made possible by actuating the first pre- blowing valve 224 and then simultaneously actuating the second pre-blowing valve 234.
  • the stepped delivery of the pre-blowing pressure to the preform 211 can provide a more consistent distribution and expansion of the preform 211 as the stretch rod 202 extends and the pre-blowing pressure is provided.
  • the pressure of the preform can decrease during the pre-blowing phase. This can be accomplished by actuating the third pre- blowing valve 244 to partially exhaust the preform 211.
  • the first pre-blowing valve 224 can be actuated while the stretch rod 202 travels to L 1 ; where the mold cavity 205 has a diameter di.
  • the second pre-blowing valve 234 may be actuated simultaneously to the first pre-blowing valve 224 to create a step jump in the pressure.
  • the stretch rod 202 continues to L 3 , the diameter decreases to d 3 and the third pre-blowing valve 244 may be actuated to at decrease the pressure in the preform 211.
  • one of the first or second pre- blowing valves 224, 234 may remain actuated, or the first and second pre-blowing valves 224, 234 may be de-actuated while the third pre-blowing vale 244 is actuated.
  • the stretch rod 202 reaches the final length of L 4 that has a diameter of d 4 , the first and/or second pre-blowing valve 224, 234 may be once again actuated while the third pre-blowing valve 244 is de-actuated.
  • the pre-blowing phase ends after a predetermined amount of time or once the pressure in the preform 211 reaches a threshold pressure.
  • the pressurized fluid source 236 may be substantially equal to the blowing pressurized fluid source 284, the pre-blowing phase will end before the pressure of the preform 211 reaches the blowing pressure.
  • the pre-blowing valves 224, 234, 244 can be actuated back to the closed position.
  • one or more check valves 390, 391 can be provided to automatically prevent fluid from flowing from the fluid pathway 243 back to the pre- blowing valve module 204.
  • the check valve 391 may comprise a controllable check valve that can be opened upon receiving a signal from a controller (not shown).
  • the system 200 enters the blowing phase.
  • the blowing valve 214 can be actuated from a first position to a second position. Once actuated to the second position, the first fluid port 214a is in fluid communication with the second fluid port 214b.
  • the first port 214a can be in fluid communication with a blowing pressure supply 284.
  • the blowing pressure supply 284 may be at a second pressure.
  • the second pressure is higher than the first pressure of the pressurized fluid source 226.
  • the second, blowing pressure can be approximately 40 bar (580 psi), for example.
  • blowing pressure used will depend on the particular application and should in no way limit the scope of the present embodiment. While the blowing pressure is typically air, other gases may be used depending on the particular application.
  • the blowing valve 214 As the blowing valve 214 is actuated to the second position, the blowing pressure is supplied to the stretched preform. This increase in pressure during the blowing phase can be seen in FIG. 4 between times t] and t 2 , for example. As discussed above, during the blowing phase, the stretched preform is expanded against the mold cavity 205 and shaped into the final product.
  • blowing valve 214 is provided, more than one blowing valve may be used. For example, if two blowing valves were used, a first blowing valve may be used to raise the pressure from the pre-blowing pressure to approximately 20 bar (290 psi) while the second blowing valve could raise the pressure in the preform from 20 bar (290 psi) to 40 bar (580 psi). Consequently, those skilled in the art will readily recognize that the present embodiment is not limited to one blowing valve 214.
  • the one or more blowing valves can be closed.
  • an optional air recovery valve 215 can be actuated from a first position to a second position. In the second position, the first fluid port 215a is in fluid communication with the second fluid port 215b of the air recovery valve 215.
  • the air recovery system 285 may be in fluid communication with the pre-blowing pressure supply 226 or 236, for example. Therefore, the pre-blowing pressure supply 226 or 236 may not require a separate fluid source.
  • the air recovery phase is depicted in FIG. 4 between times t 2 and t 3 . As can be appreciated, in embodiments where more than one blowing valve is provided, more than one air recovery valve may be used.
  • the air recovery valve 215 can be closed.
  • the exhaust valve 216 can be actuated from a first position to a second position to exhaust the remaining pressure to atmosphere. In the second position, a first fluid port 216a is in fluid communication with a second fluid port 216b.
  • the exhaust phase is shown in FIG. 4 between time t 3 and time t 4 .
  • the blowing valve 214 may be configured to act as the exhaust valve and optionally as the air recovery valve.
  • the blowing valve 214 could comprise a 5/4-way valve that can be actuated to supply the blowing pressure, exhaust to the air recovery system 285, exhaust to atmosphere, and close all ports. Therefore, the present embodiment should not be limited to requiring a separate and distinct air recovery valve 215 and exhaust valve 216.
  • the stretch blow molding system 200 may be used to stretch blow mold a preform into a desired product by being coupled to the preform 211 and/or the mold cavity 205.
  • the pre-blowing phase can begin.
  • the pre-blowing valve module 204 can be actuated to supply a pre-blowing air supply to the cylinder 201 and thus, the preform 211.
  • the various valves 224, 234, 244 of the pre-blowing valve module 204 can be actuated from a first position to a second position individually or simultaneously to accommodate a desired pressure curve.
  • the air supplied to the preform 211 can be provided to the preform 211 in a more controlled manner.
  • the air can be supplied in a stepped manner or in a gradual increasing manner.
  • one or more of the pressurized fluid sources 226, 236 in fluid communication with the pre-blowing valve module 204 may be at a pressure that is higher than the desired end pre-blowing phase pressure, the valves 224, 234, 244 can be closed prior to the pressure of the preform 211 exceeding the desired pre-blowing first pressure.
  • the stretch rod 202 can also be extended from the cylinder 201 and into the preform 211 during the pre-blowing phase.
  • the actuation of the stretch rod 202 can occur substantially simultaneously with the actuation of the pre-blowing valves 224, 234, 244.
  • the stretch rod 202 can be extended into the preform 211 to stretch the preform 211 in a longitudinal direction by actuating the stretch rod control valve 203 to a first actuated position thereby pressurizing the first fluid chamber 231.
  • the actuation of the pre-blowing valves 224, 234, 244 may be based on a stretch rod position as determined by the position sensor 230 or alternatively, based on an elapsed time.
  • the stretch rod position may be controlled based on an elapsed time.
  • the actuation of the pre-blowing valves 224, 234, 244 may be based on both the stretch rod position and the elapsed time.
  • the stretch rod position or the elapsed time may comprise a secondary system for controlling the actuation of the pre-blowing valves 224, 234, 244 in the event that the primary control system fails.
  • valves 224, 234, 244 are primarily controlled based on the elapsed time, but the position sensor 230 senses that the stretch rod 202 has reached a predetermined position prior to the elapsed time, one or more of the pre-blowing valves 224, 234, 244 may be actuated prior to the scheduled elapsed time.
  • the pre-blowing valves 224, 234, 244 may be actuated back to their neutral position.
  • the pre-blowing valves 224, 234, 244 may simply remain in the second position as one or more check valves 390, 391 can prevent the higher blowing pressure from reaching the pre-blowing valve module 204.
  • the blowing valve 214 can be actuated to supply the blowing pressure to the stretched preform.
  • the blowing pressure can expand the preform against the cavity so the preform assumes the shape of the interior of the cavity 205.
  • the air recovery valve 215 or the exhaust valve 216 can be actuated to recover a portion of the air or exhaust the air to atmosphere.
  • the embodiments described above provide a stretch blow molding system 200 that utilizes a plurality of pre-blowing valves 224, 234, 244 along with a separate blowing valve 214. Additionally, an air recovery valve 215 and an exhaust valve 216 can be provided.
  • the use of multiple pre-blowing valves 224, 234, 244 that can be actuated simultaneously allows greater control over the pre-blowing phase to provide improved material distribution of the preform 211 during the pre-blowing phase. Further, by actuating two or more pre-blowing valves 224, 234, 244 simultaneously rather than using a proportional pre-blowing valve allows for cheaper and more repeatable control of the pre-blowing phase while allowing for various shaped pressure curves.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)

Abstract

L'invention porte sur un procédé pour mouler par soufflage avec étirage une préforme (21) dans une empreinte de moule (205). L'empreinte de moule (205) est couplée à un système de moulage par soufflage avec étirage (200) comprenant un cylindre (201), un piston (212) mobile à l'intérieur du cylindre et une tige d'étirage (202) couplée au piston. Le procédé comprend une étape consistant à actionner une première valve de présoufflage (234) d'une première position à une seconde position pour fournir une première pression de présoufflage à la préforme (211) à une première pression et à un premier débit. Le procédé comprend également une étape consistant à déterminer une position de tige d'étirage et/ou un temps écoulé. Lorsque la première valve de présoufflage (234) reste actionnée, le procédé actionne au moins une seconde valve de présoufflage (234) d'une première position à une seconde position, sur la base de la position de tige d'étirage déterminée et/ou du temps écoulé pour fournir une seconde pression de présoufflage à la préforme à une seconde pression et/ou à un second débit ou à une pression d'échappement sortant de la préforme (211).
PCT/EP2013/072859 2012-11-01 2013-11-01 Système de moulage par soufflage avec étirage comprenant actionnement simultané de valve de présoufflage WO2014068080A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201261721142P 2012-11-01 2012-11-01
US61/721,142 2012-11-01

Publications (2)

Publication Number Publication Date
WO2014068080A1 true WO2014068080A1 (fr) 2014-05-08
WO2014068080A9 WO2014068080A9 (fr) 2014-07-10

Family

ID=49619882

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2013/072859 WO2014068080A1 (fr) 2012-11-01 2013-11-01 Système de moulage par soufflage avec étirage comprenant actionnement simultané de valve de présoufflage

Country Status (2)

Country Link
TW (1) TW201429671A (fr)
WO (1) WO2014068080A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3172033B1 (fr) 2014-07-25 2018-05-23 Sidel Participations Procede de controle d'un procede de soufflage de recipients en matiere plastique
EP2977184B1 (fr) 2014-07-25 2019-09-04 KHS Corpoplast GmbH Entree d'air de soufflage a commande de volume
JPWO2020204178A1 (fr) * 2019-04-03 2020-10-08
EP3825097A1 (fr) * 2019-11-19 2021-05-26 Krones AG Dispositif de formage des préformes en matière plastique pour obtenir des récipients en matière plastique pourvu de soupape proportionnelle
DE102021128205A1 (de) 2021-10-28 2023-05-04 Krones Aktiengesellschaft Vorrichtung und Verfahren zum Umformen von Kunststoffvorformlingen zu Kunststoffbehältnissen mit verstellbarer Drossel

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007023349A1 (fr) * 2005-08-23 2007-03-01 Technoplan Engineering Sa Procede de soufflage au moyen d'un gaz d'un emballage et dispositif de mise en oeuvre
US7263781B2 (en) 2003-03-26 2007-09-04 Imi Norgren-Herion Fluidtronic Gmbh & Co Kg Position-measuring device for fluidic cylinder-and-piston arrangements
EP1905569A2 (fr) * 2006-09-26 2008-04-02 ACQUA MINERALE SAN BENEDETTO S.p.A. Procédé et appareil permettant de fabriquer des recipients en matière plastique par soufflage et de recuperer l'air de soufflage comprimé
EP2298534A2 (fr) * 2009-09-10 2011-03-23 Krones AG Procédé et dispositif destinés au moulage par soufflage de récipients
WO2011154326A1 (fr) 2010-06-09 2011-12-15 Norgren Gmbh Système de moulage par étirage-soufflage utilisant des vannes proportionnelles

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7263781B2 (en) 2003-03-26 2007-09-04 Imi Norgren-Herion Fluidtronic Gmbh & Co Kg Position-measuring device for fluidic cylinder-and-piston arrangements
WO2007023349A1 (fr) * 2005-08-23 2007-03-01 Technoplan Engineering Sa Procede de soufflage au moyen d'un gaz d'un emballage et dispositif de mise en oeuvre
EP1905569A2 (fr) * 2006-09-26 2008-04-02 ACQUA MINERALE SAN BENEDETTO S.p.A. Procédé et appareil permettant de fabriquer des recipients en matière plastique par soufflage et de recuperer l'air de soufflage comprimé
EP2298534A2 (fr) * 2009-09-10 2011-03-23 Krones AG Procédé et dispositif destinés au moulage par soufflage de récipients
WO2011154326A1 (fr) 2010-06-09 2011-12-15 Norgren Gmbh Système de moulage par étirage-soufflage utilisant des vannes proportionnelles

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3172033B1 (fr) 2014-07-25 2018-05-23 Sidel Participations Procede de controle d'un procede de soufflage de recipients en matiere plastique
EP2977184B1 (fr) 2014-07-25 2019-09-04 KHS Corpoplast GmbH Entree d'air de soufflage a commande de volume
US10857717B2 (en) 2014-07-25 2020-12-08 Khs Corpoplast Gmbh Volume controlled blowing-air feed
EP2977184B2 (fr) † 2014-07-25 2023-02-22 KHS GmbH Entree d'air de soufflage a commande de volume
JPWO2020204178A1 (fr) * 2019-04-03 2020-10-08
EP3950267A4 (fr) * 2019-04-03 2023-01-04 Nissei Asb Machine Co., Ltd. Dispositif de fabrication et procédé de fabrication de récipient en résine
JP7448525B2 (ja) 2019-04-03 2024-03-12 日精エー・エス・ビー機械株式会社 樹脂製容器の製造装置及び製造方法
US11958231B2 (en) 2019-04-03 2024-04-16 Nissei Asb Machine Co., Ltd. Resin container manufacturing device and manufacturing method
EP3825097A1 (fr) * 2019-11-19 2021-05-26 Krones AG Dispositif de formage des préformes en matière plastique pour obtenir des récipients en matière plastique pourvu de soupape proportionnelle
US11865762B2 (en) 2019-11-19 2024-01-09 Krones Ag Apparatus for transforming plastic preforms into plastic containers having a proportional valve
DE102021128205A1 (de) 2021-10-28 2023-05-04 Krones Aktiengesellschaft Vorrichtung und Verfahren zum Umformen von Kunststoffvorformlingen zu Kunststoffbehältnissen mit verstellbarer Drossel

Also Published As

Publication number Publication date
WO2014068080A9 (fr) 2014-07-10
TW201429671A (zh) 2014-08-01

Similar Documents

Publication Publication Date Title
WO2014068080A1 (fr) Système de moulage par soufflage avec étirage comprenant actionnement simultané de valve de présoufflage
EP2844454B1 (fr) Système de soufflage bi-orienté
WO2011154326A1 (fr) Système de moulage par étirage-soufflage utilisant des vannes proportionnelles
JP5509338B2 (ja) 多段式弁システム
CA2745115C (fr) Dispositif de reglage de la pression dans des machines de moulage par etirage-soufflage
WO2013135838A1 (fr) Système de moulage par injection-soufflage avec étirage doté d'une soupape de pré-soufflage proportionnelle
US20160158994A1 (en) Valve Arrangement
EP3418029A1 (fr) Soupape de soufflage
US10155335B2 (en) Method and device for forming plastic preforms with cross-section change of a volume flow
US20150184771A1 (en) Electromagnet assisted pressure-actuated valve
US10046504B2 (en) Fluid flow control device
WO2011079917A1 (fr) Système de moulage par soufflage avec tige extensible comprenant une ou plusieurs valves
CN103201548B (zh) 压力补偿阀
US20130312398A1 (en) Multiple-staged fluid operated actuator
EP1964661B1 (fr) Unite d alimentation en air de soufflage destinee a une machine de moulage par soufflage
US20120199779A1 (en) Valve block assembly for a blow molding system
EP3970946B1 (fr) Dispositif de commande d'écoulement de fluide
WO2016008151A1 (fr) Cylindre de moulage par soufflage avec étirage et procédé associé
US20130153809A1 (en) Blowing Machine Valve
CN108472897B (zh) 轮胎热压机

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 13792611

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 13792611

Country of ref document: EP

Kind code of ref document: A1