In a method for producing hollow bodies (H) from preforms (V) by means of blow molding, a) a preform (V) is provided, b) a process gas having a normal formulation is introduced into the internal volume of one of the preforms (V) in a cascade from at least three gas reservoirs (61, 62, 63, 64) with different specified gas pressures (P1, P2, P3, P4) so as to have a correspondingly increasing process pressure, the last gas reservoir (64) used having the highest specified gas pressure (P4), and c) after the blowing process has ended, at least some of the process gas used is returned in a cascade to the gas reservoirs (61, 62, 63) having a lower specified gas pressure (P1, P2, P3). At least at the start of a production process for producing a plurality of the hollow bodies (H), before steps a) to c) are carried out for the first time, a process gas having a special formulation is introduced into at least one first preform (V) in order to produce a hollow body (H) of a similar quality or the same quality as when using the normal formulation, the special formulation differing from the normal formulation. The method according to the invention and the device according to the invention allow a multi-stage blowing process with a multi-stage recuperation while at the same time reducing costs.
The invention relates to a valve device comprising - a valve having a movable piston (21) for closing and opening the valve, - a magnet (22) or a magnetizable element and - a sensor unit (6) having a magnetic-field sensor (64) for determining the position of the piston (21). The magnet (22) or the magnetizable element and the sensor unit (6) are movable relative to one another by the movement of the piston (22). The magnetic-field sensor (64) is designed to measure an at least two-dimensional vector of a magnetic flux density. An analysis unit determines a change in the angle of the at least two-dimensional vector. The valve device and a corresponding method allow for the precise determination of the position of the piston even in a confined space.
F15B 15/28 - Moyens pour indiquer la position, p. ex. fin de course
F16K 11/20 - Soupapes ou clapets à voies multiples, p. ex. clapets mélangeursRaccords de tuyauteries comportant de tels clapets ou soupapesAménagement d'obturateurs et de voies d'écoulement spécialement conçu pour mélanger les fluides dont plusieurs éléments de fermeture ne se déplacent pas comme un tout actionnés par des organes de commande distincts
F16K 31/06 - Moyens de fonctionnementDispositifs de retour à la position de repos électriquesMoyens de fonctionnementDispositifs de retour à la position de repos magnétiques utilisant un aimant
G01D 5/14 - Moyens mécaniques pour le transfert de la grandeur de sortie d'un organe sensibleMoyens pour convertir la grandeur de sortie d'un organe sensible en une autre variable, lorsque la forme ou la nature de l'organe sensible n'imposent pas un moyen de conversion déterminéTransducteurs non spécialement adaptés à une variable particulière utilisant des moyens électriques ou magnétiques influençant la valeur d'un courant ou d'une tension
A valve has a valve housing (1) which has an inlet bore (10), an outlet bore (11) and a cavity (15) through which fluid can flow and which connects the inlet bore (10) to the outlet bore (11). The valve housing (1) forms a valve seat (18). The cavity (15) defines a longitudinal central axis (L). A control element (6, 7, 8, 9) can be moved back and forth along the longitudinal central axis (L) within the cavity (15) between an open position of the valve and a closed position of the valve. It has a sealing surface (80) which, in the open position of the valve, is spaced apart from the valve seat (18) and which, in the closed position of the valve, makes sealing contact with the valve seat (18). The movable control element (6, 7, 8, 9) is formed in at least two parts, wherein the movable control element has a first part, which is designed as a first shaft (6), and a second part, which is designed as a second shaft (7). The two shafts (6, 7) are fixedly connected to one another in the cavity (15) through which fluid can flow. The two shafts (6, 7) preferably hold a sealing element (8) which forms the sealing surface (80). The valve is suitable as a high-pressure valve and can be assembled in a simple manner.
F16K 1/02 - Soupapes ou clapets, c.-à-d. dispositifs obturateurs dont l'élément de fermeture possède au moins une composante du mouvement d'ouverture ou de fermeture perpendiculaire à la surface d'obturation à tige filetée
The invention relates to a valve device comprising - a valve having a movable piston (21) for closing and opening the valve, - a magnet (22) or a magnetizable element and - a sensor unit (6) having a magnetic-field sensor (64) for determining the position of the piston (21). The magnet (22) or the magnetizable element and the sensor unit (6) are movable relative to one another by the movement of the piston (22). The magnetic-field sensor (64) is designed to measure an at least two-dimensional vector of a magnetic flux density. An analysis unit determines a change in the angle of the at least two-dimensional vector. The valve device and a corresponding method allow for the precise determination of the position of the piston even in a confined space.
F16K 11/20 - Soupapes ou clapets à voies multiples, p. ex. clapets mélangeursRaccords de tuyauteries comportant de tels clapets ou soupapesAménagement d'obturateurs et de voies d'écoulement spécialement conçu pour mélanger les fluides dont plusieurs éléments de fermeture ne se déplacent pas comme un tout actionnés par des organes de commande distincts
F15B 15/28 - Moyens pour indiquer la position, p. ex. fin de course
F16K 31/06 - Moyens de fonctionnementDispositifs de retour à la position de repos électriquesMoyens de fonctionnementDispositifs de retour à la position de repos magnétiques utilisant un aimant
F16K 37/00 - Moyens particuliers portés par ou sur les soupapes ou autres dispositifs d'obturation pour repérer ou enregistrer leur fonctionnement ou pour permettre de donner l'alarme
G01D 5/14 - Moyens mécaniques pour le transfert de la grandeur de sortie d'un organe sensibleMoyens pour convertir la grandeur de sortie d'un organe sensible en une autre variable, lorsque la forme ou la nature de l'organe sensible n'imposent pas un moyen de conversion déterminéTransducteurs non spécialement adaptés à une variable particulière utilisant des moyens électriques ou magnétiques influençant la valeur d'un courant ou d'une tension
5.
DISTRIBUTOR OF A FLUID SUPPLY SYSTEM, AND VALVE UNIT
A distributor (V) of a fluid supply system, in particular of a hydrogen filling station, has lines (10-16) for connecting storage containers (B1-B8) to stations (CP, Z1-Z4), and valve units (6, 7) for selectively opening and closing the connection between the storage containers (B1-B8) and the stations (CP, Z1-Z4). The lines (10-16) are arranged in a matrix formation in a line module (1). The valve units (6, 7) are releasably secured in a matrix formation on the line module (1). The distributor permits a compact and space-saving arrangement of valve units, which can also be easily exchanged. Each valve unit preferably comprises a main valve, a pilot valve and a check valve.
F17C 5/00 - Procédés ou appareils pour remplir des récipients sous pression de gaz liquéfiés, solidifiés ou comprimés
F17C 5/06 - Procédés ou appareils pour remplir des récipients sous pression de gaz liquéfiés, solidifiés ou comprimés pour le remplissage avec des gaz comprimés
A check valve, in particular of a hydrogen refuelling system, has an inlet and an outlet which define a flow direction that extends from the inlet to the outlet. The check valve has a piston (6), which is arranged such that it can move relative to the inlet and outlet, for opening and closing the inlet of the check valve, wherein the piston (6) defines a piston axis (63) with a first end facing the inlet and a second end facing the outlet. The piston (6) has an outer surface along which flows a fluid flowing through the check valve in the flow direction. The outlet has outlet channels (35) to allow the fluid to flow outwards out of the check valve, wherein all of the outlet channels (35) of the outlet run obliquely to the piston axis (63). The check valve can be used for high pressures and allows gentle closing even with a reversal of the pressure action. In particular, it can be used in hydrogen filling stations.
A throttle unit, in particular of a blow moulding device, includes a throttle and a position sensor. The throttle has an actuator and a drive unit including an electric motor for changing a position of the actuator. A throughflow cross section in a throughflow channel of a fluid can be changed by changing the position of the actuator. The drive unit is arranged at a first end of the actuator. The position sensor monitors the position of the actuator directly. The throttle unit makes it possible to set and adjust the throttle automatically in an accurate but nevertheless cost-effective manner.
A valve unit comprises a valve having a movable piston (20) for closing and opening the valve. The valve unit also comprises a magnet (5) or a magnetizable element (50) and a sensor unit (4) which has a magnetic field sensor, preferably a Hall effect sensor (41), for determining a position of the piston (20). The magnet (5) or the magnetizable element (50) and the sensor unit (4) can be moved relative to each other by the movement of the piston (20). The valve unit comprises a control device (7) which continuously evaluates positions of the piston (20). The control device (7) is designed to evaluate, in addition to a closed state and an open state of the valve, additional positions during a movement of the piston (20). The valve unit allows precise monitoring of the piston and thus early detection of aging.
F16K 37/00 - Moyens particuliers portés par ou sur les soupapes ou autres dispositifs d'obturation pour repérer ou enregistrer leur fonctionnement ou pour permettre de donner l'alarme
G01D 5/14 - Moyens mécaniques pour le transfert de la grandeur de sortie d'un organe sensibleMoyens pour convertir la grandeur de sortie d'un organe sensible en une autre variable, lorsque la forme ou la nature de l'organe sensible n'imposent pas un moyen de conversion déterminéTransducteurs non spécialement adaptés à une variable particulière utilisant des moyens électriques ou magnétiques influençant la valeur d'un courant ou d'une tension
A valve, in particular of an extrusion blow moulding machine or a stretch blow moulding machine for manufacturing hollow bodies, has a movable piston, a process fluid region and a compensation chamber. The piston has a free front face which faces the process fluid region with a circumferential outer sealing region. At least one connecting channel connects the process fluid region to the compensation chamber. The free front face of the piston has an elevation, which is surrounded by the outer sealing region. The elevation protrudes over the outer circumferential sealing region. The valve permits a rapid and precisely timed opening.
F16K 31/383 - Moyens de fonctionnementDispositifs de retour à la position de repos actionnés par un fluide et dans lesquels il y a alimentation constante du moteur à fluide par le fluide provenant de la canalisation le fluide travaillant directement sur les deux côtés du moteur à fluide, un des côtés étant relié par un étranglement et le moteur étant actionné par la décharge effectuée de ce même côté le fluide agissant sur un piston
F16K 39/02 - Dispositifs pour relâcher la pression sur les faces d'un joint d'étanchéité dans le cas de soupapes de levage
A valve unit comprises an operating piston for closing and opening a connection between a process pressure input line and a process pressure output line, at least one control line and at least one control chamber for controlling the operating piston. The operating piston has a closing ring which in the closed state of the connection sealingly abuts a valve seat of the valve housing (or the valve housing has a closing ring which in the closed state of the connection sealingly abuts against a valve seat of the operating piston). The valve seat consists of a softer and more elastic material than a circumferential sealing edge abutting said valve seat. An annular sealing element is present which comprises the valve seat. The sealing element has the shape of a truncated cone with an outwardly widening base.
A solenoid valve has an electromagnet with a coil, an RFID tag for identifying the solenoid valve, and an antenna for unidirectional or bidirectional communication with the RFID tag. The antenna is the coil of the electromagnet. Using the coil of an electromagnet for communication with an RFID tag permits inexpensive quality assurance when using solenoid valves, in particular in blow moulding machines.
B29C 49/42 - Éléments constitutifs, détails ou accessoiresOpérations auxiliaires
G06K 19/07 - Supports d'enregistrement avec des marques conductrices, des circuits imprimés ou des éléments de circuit à semi-conducteurs, p. ex. cartes d'identité ou cartes de crédit avec des puces à circuit intégré
G06K 19/077 - Détails de structure, p. ex. montage de circuits dans le support
H01Q 1/22 - SupportsMoyens de montage par association structurale avec d'autres équipements ou objets
A device of a blow-moulding apparatus for moulding hollow bodies, in particular a stretch blow-moulding machine, is disclosed. The device includes a housing block with a through-bore, at least one valve with a movable piston and with a valve chamber, a first channel which runs in the housing block and which connects the valve chamber to the through-bore, a second channel which connects the valve chamber to an external line, and a cover for fastening the valve to the housing block. The valve connects the first channel and the second channel to one another and separates them from one another. The second channel runs at least partially in the cover and/or at least one part of the valve chamber is arranged in the cover and surrounds the piston. The device is small and compact and the valves may be replaced in a simple manner.
Method for actuating a valve unit, which has a process pressure inlet, a process pressure outlet and a valve chamber connecting the process pressure inlet to the process pressure outlet and a movable piston for closing and opening the connection between the process pressure inlet and the process pressure outlet. The piston is able to be subjected on a first side to a first control pressure and the piston is able to be subjected on a second side to a second control pressure. The piston is moved by means of the first control pressure and the second control pressure for the purpose of closing and opening the connection. In the operating state of the valve unit, the piston is permanently subjected to the first control pressure, wherein the piston is additionally subjected to the second control pressure for moving the piston in one direction and wherein a pressure which is higher than atmospheric pressure and lower than the second control pressure is used as the first control pressure.
In a method for monitoring a blow-moulding device for producing a hollow body, the blow-moulding device includes at least one process valve unit for feeding a process fluid into a preform of the hollow body under process pressure, wherein the process valve unit includes at least one electrically operated valve. During a blow-moulding process, at least one value of an electric current of the electrically operated valve is detected. The method and the device allow early recognition of an ageing process of the process valves, in particular their pilot valves, and/or the recognition of the status of valve properties.
A valve unit includes a valve housing having an input line and an output line or the process pressure as well as a process guide shaft, an operating piston for closing and opening a connection between the two lines, two control lines and two control chambers for controlling the operating piston. The operating piston has a closing ring which in the closed state of the connection sealingly abuts a valve seat of the valve housing and it has a diameter which corresponds to a guide diameter of a dynamic process seal. The valve seat includes a softer and more elastic material than the sealing edge. The valve unit has low axial forces, due to low sealing forces, thus makes a long service life with a high number of cycles of operation possible.
In a method for monitoring a blow-moulding device for producing a hollow body, the blow-moulding device comprises at least one process valve unit for feeding a process fluid into a preform of the hollow body under process pressure, wherein the process valve unit comprises at least one electrically operated valve. During a blow-moulding process, at least one value of an electric current of the electrically operated valve is detected. The method according to the invention and the device according to the invention allow early recognition of an ageing process of the process valves, in particular their pilot valves, and/or the recognition of the status of valve properties.
A gas injector has an injector lance, a drive unit, a push rod and a valve. The injector lance has a free end for injecting gas into an external unit. The drive unit generates a linear movement of the push rod, as a result of which the push rod actuates the valve and exposes a valve through-passage opening, in order for the gas to be injected. The valve through-passage opening is arranged in the region of the free end of the injector lance ). The gas injector can be designed to be relatively small and narrow. It minimizes switching delays, avoids dead spaces and prevents contamination of the valve.
F02M 21/02 - Appareils pour alimenter les moteurs en combustibles non liquides, p. ex. en combustibles gazeux stockés sous forme liquide en combustibles gazeux
F02B 19/00 - Moteurs caractérisés par des chambres de précombustion
The invention relates to a valve unit, comprising a valve housing (1) having a process pressure input line (31), a process pressure output line (32), and a process guide shaft (10). Furthermore, an operating piston (2) for closing the valve, a first and a second control line (50, 60), and a first and a second control room (40, 41) for controlling the operating piston (2) are provided. The operating piston (2) can be displaced in the axial direction within the process guide shaft (10) in a sealed manner by means of a dynamic process seal. Said operating piston has a closing ring, which in the closed state of the connection sealingly abuts a valve seat (700) of the valve housing (1). The closing ring is designed as a circumferential sealing edge (250), wherein the valve seat (700) is made of a softer and more elastic material than the sealing edge (250) abutting valve seat. The circumferential sealing edge (250) has a diameter, which corresponds to a guide diameter of the dynamic process seal. The valve unit according to the invention has low axial forces, and thus makes a long service life with a high number of cycles of operation possible.
A gas injector has an injector lance (2), a drive unit (5), a push rod (21) and a valve (6, 8). The injector lance (2) has a free end for injecting gas into an external unit. The drive unit (5) generates a linear movement of the push rod (21), as a result of which the push rod (21) actuates the valve (6, 8) and exposes a valve through-passage opening (69), in order for the gas to be injected. The valve through-passage opening (69) is arranged in the region of the free end of the injector lance (2). The gas injector can be designed to be relatively small and narrow. It minimizes switching delays, avoids dead spaces and prevents contamination of the valve.
F02M 21/02 - Appareils pour alimenter les moteurs en combustibles non liquides, p. ex. en combustibles gazeux stockés sous forme liquide en combustibles gazeux
F02B 19/00 - Moteurs caractérisés par des chambres de précombustion
A valve has a valve housing in which a closure element having at least one sleeve section is movable along its sleeve longitudinal axis by an actuator to open and close a fluid connection between a fluid inlet and outlet. The actuator has stationary and movable parts relative to the valve housing. At least the movable parts and the closure element are arranged entirely within an enclosed fluid space between the fluid inlet and outlet. To close the fluid connection spaced first and second seal devices of a double-sealed seat are in sealing contact with equally-spaced first and second counter-seal devices on the valve housing along first and second closed seating lines, respectively. With regard to the at least one double-seal seat, the ratio between first and second areas enclosed by first and second sealing lines in projection along the sleeve longitudinal axis, respectively, is between 6/10 and 10/6.
F16K 31/06 - Moyens de fonctionnementDispositifs de retour à la position de repos électriquesMoyens de fonctionnementDispositifs de retour à la position de repos magnétiques utilisant un aimant
F02M 21/02 - Appareils pour alimenter les moteurs en combustibles non liquides, p. ex. en combustibles gazeux stockés sous forme liquide en combustibles gazeux
F16K 31/08 - Moyens de fonctionnementDispositifs de retour à la position de repos électriquesMoyens de fonctionnementDispositifs de retour à la position de repos magnétiques utilisant un aimant utilisant un aimant permanent
The invention relates to a valve (1) having a valve housing (10) in which, for the purpose of opening and closing a fluid connection between a fluid inlet (18) and a fluid outlet (19) of the valve housing (10), a closure element (20) having at least one sleeve section (23) can be moved along its sleeve longitudinal axis (L) by means of an actuator (30), wherein the actuator (30) has parts (31, 32) that are respectively stationary and movable with respect to the valve housing (10) and at least the movable parts (32) of the actuator (30) and the closure element (20) are arranged entirely within a fluid space (17), enclosed by the valve housing (10), between the fluid inlet (18) and the fluid outlet (19), and wherein the valve (1) has at least one double-seal seat which has on the sleeve section (23) a first and a second seal device (21, 22), spaced apart therefrom along the sleeve longitudinal axis (L), and on the valve housing (10) a first and a second counter-seal device (11, 12), accordingly spaced apart equally, wherein in order to close the fluid connection the first seal device (21) is in sealing contact with the first counter-seal device (11) along a first closed seating line and the second seal device (22) is in sealing contact with the second counter-seal device (12) along a second closed seating line, and wherein, with regard to the at least one double-seal seat, the ratio between a first area enclosed by the first sealing line in projection along the sleeve longitudinal axis (L) and a second area enclosed by the second sealing line in projection along the sleeve longitudinal axis (L) is between 6/10 and 10/6.
F02M 21/02 - Appareils pour alimenter les moteurs en combustibles non liquides, p. ex. en combustibles gazeux stockés sous forme liquide en combustibles gazeux
F16K 1/44 - Détails du siège ou du corps de soupape pour les soupapes à double siège
F02M 61/18 - Buses d'injection, p. ex. comportant des sièges de clapets
F16K 25/00 - Détails constitutifs relatifs au contact entre corps de soupapes ou de clapets et leurs sièges
F16K 31/06 - Moyens de fonctionnementDispositifs de retour à la position de repos électriquesMoyens de fonctionnementDispositifs de retour à la position de repos magnétiques utilisant un aimant
22.
Device for controlling blowing mediums in a stretch blow moulding machine
The present invention relates to a device for controlling blowing mediums in a stretch blow moulding machine for producing hollow bodies of heated preforms, wherein the device comprises a housing block with a first through-bore for accommodating at least one blow nozzle. In addition, a first and a second valve are provided, wherein these valves are in fluid communication with the first through-bore and configured for selectively connecting a blow nozzle accommodated in the through-bore to a fluid connection. In order to simplify the construction of the device and to prevent leakages, the housing block furthermore comprises first and second valve channels for accommodating the first and the second valve within the housing block, wherein the first and second valve channels are in fluid communication with the first through-bore.
B29C 49/42 - Éléments constitutifs, détails ou accessoiresOpérations auxiliaires
F16K 27/00 - Structures des logementsMatériaux utilisés à cet effet
B29K 67/00 - Utilisation de polyesters comme matière de moulage
B29C 49/46 - Éléments constitutifs, détails ou accessoiresOpérations auxiliaires caractérisés par l'emploi d'un milieu particulier ou de fluides de soufflage autres que l'air
The invention relates to a valve arrangement (100) having a main valve (1) having a switching piston (2) guided in a valve housing (3), which switching piston (2) can be moved relative to the valve housing (3) between a first position, in which the main valve (1) is closed, and a second position, in which the main valve (1) is open. The switching piston (2) has a control surface (9), configured to face a control chamber (10) of the valve housing (3) and to transfer a control force onto the switching piston (2). According to the invention, at least one bore (21; 27, 28) connecting a control air switching chamber (20) to the control chamber (10) in terms of flow is provided, by way of which control air can be introduced into the control chamber (10) for closing the main valve (1), and by way of which the control chamber (10) can be vented when opening the main valve (1). By way of a control air bore (23) terminating in the control air switching chamber (20), control air can be introduced to the control air switching chamber (20), wherein a venting bore (24) terminating in the control air switching chamber (20) is provided, by way of which the control chamber (10) can be vented when the main valve (1) is opened.
09 - Appareils et instruments scientifiques et électriques
37 - Services de construction; extraction minière; installation et réparation
42 - Services scientifiques, technologiques et industriels, recherche et conception
Produits et services
Machines and machine tools; valves (parts of machines); all
the aforesaid goods not as parts of machines for industrial
cleaning and washing of textiles as well as for dosage of
products in these machines. Solenoid valves (electromagnetic switches); electromagnetic
coils; apparatus and instruments for conducting, switching,
transforming, accumulating, regulating or controlling
electricity. Repair services; repair and maintenance of valves and/or of
machines and systems containing valves; replacement of worn
parts; installation services. Research and design services, particularly research in the
field of technology and engineering as well as technical
project planning; design services.
09 - Appareils et instruments scientifiques et électriques
37 - Services de construction; extraction minière; installation et réparation
42 - Services scientifiques, technologiques et industriels, recherche et conception
Produits et services
Valves and pressure regulators for use in combustion engines and gas turbines, all the aforesaid goods not being parts of machines for industrial cleaning and washing of textiles as well as for dosage of products in these machines Solenoid valves and electromagnetic coils Repair services for valves or pressure regulators being parts of machines; repair and maintenance of valves or pressure regulators being parts of machines; and replacement of worn parts in machine parts, namely, valves or pressure regulators being parts of machines Research and design services in the field of valve technology and mechatronics; mechanical engineering and engineering services for technical project planning; engineering design services, all the aforesaid services being in the field of valves and/or [ machines ] * pressure regulators * and valve systems
26.
Devices and method for draw blow moulding a container and the corresponding use
The invention relates to a device (10) for blow molding a container from a parison, comprising a blowing cylinder (11) and a blowing nozzle (12) mounted thereon, in which the parison (R) can be fixed and with a stretching rod (13), enclose by the cylinder (11) and which may be passed through the nozzle (12), wherein the nozzle (12) can be supplied with compressed air via openings (14) in the cylinder (11). The station (10) is characterized in that the stretching rod (13) is driven by a single tubular electric linear motor (15) the stator (15-1) of which is mounted on the cylinder (11) and the armature (15-2) of which is connected to the stretching rod (13).
The invention relates to a valve block (V) for controlling gaseous fluids (F), comprising at least one channel (K) passing through the block (V) for conducting a fluid (F) and at least one controlling and/or measuring component (C1, C2) arranged along said channel (K), the at least one component being accommodated in a seat (S1, S2) formed on the outside of the block (V), said seat (S1, S2) communicating with the channel (K) by means of a passage (B1, B2), and a seal (D1, D2) that prevents the fluid (F) from escaping being provided between the component (C1, C2) and the seat (S1, S2). The invention is characterized in that the passage (B1, B2) and/or the seat (S1, S2) has a chamber-like extension (E1, E2), which is arranged either between the seal (D1, D2) and the channel (K) or between the seal (D1, D2) and an outer surface of the valve block. The invention further relates to a storage system for fluids (F) having said valve block (V) and a tank (T), to a vehicle having said storage system, and to specific uses of the valve block (V).
The invention relates to a device (10) for blow moulding a container from a parison, comprising a blowing cylinder (11) and a blowing nozzle (12) mounted thereon, in which the parison (R) can be fixed and with a stretching rod (13), enclose by the cylinder (11) and which may be passed through the nozzle (12), wherein the nozzle (12) can be supplied with compressed air via openings (14) in the cylinder (11). The station (10) is characterised in that the stretching rod (13) is driven by a single tubular electric linear motor (15) the stator (15-1) of which is mounted on the cylinder (11) and the armature (15-2) of which is connected to the stretching rod (13).
In the present silencer (20) for valve equipment for blow-moulding machines, arranged at the outlet of a venting valve of the valve equipment, for venting the compressed air from a blowing volume (17), there is a first tubular hollow body (22) at one end connected by way of an aperture to a connection nipple (21), the other end being sealed. The hollow body (22) here has, in the region of the connection nipple (21), a series of first holes (25) in its wall, and, in the region of the closed end, a further series of second holes (27), and, arranged around the hollow body (22), at a distance, there is a closed hood (28) composed of air-permeable, porous material, thus forming a closed outer chamber (26) around the hollow body (22). The exhaust air deriving from the blowing volume and released from the venting valve thus flows by way of the connection nipple (21) into the interior of the hollow body (22) and from there in two substreams into the outer chamber (26) and through the porous hood (28) into the environment.
The invention relates to a device for injecting compressed air into a parison, having an injection cylinder, having a hollow shaft (2) arranged inside the housing (1) of the injection cylinder in a manner so as to be displaceable along its longitudinal axis (A), one end of said hollow shaft projecting out of the housing (1) and provided with a connection head (7) for a tight connection to the parison, and having a stretching rod (3) arranged coaxially to the hollow shaft (2) in the interior of the hollow shaft (2) and displaceable coaxially with the hollow shaft (2). A double piston (21, 22) is arranged axially parallel to the hollow shaft (2). The double piston (21, 22) is connected to the hollow shaft (2) by a connection lug (25) and thereby moves the hollow shaft along its longitudinal axis (A) between a lower and an upper end position. The drive of the hollow shaft (2) therefore takes place not coaxially, but rather from the side via a piston axis (B) arranged parallel to the longitudinal axis (A) of the hollow shaft (2). In this way, the functioning of the air supply via the hollow shaft (2) and the movement of the coaxially arranged stretching rod (3) is separated from the drive of the hollow shaft (2).
The invention relates to a valve with a housing (1), a piston (2), arranged to be longitudinally displaced between two end positions within the housing (1) and a channel (3) connecting both front faces (4; 5),permanently connected to an outlet channel (30) by means of a valve chamber (7) and a piston ring (9) extending radially outwards from the outside of the piston (2) between both front faces (4;5) of the piston (2) with an annular axially aligned valve seal (13) on both front faces (5). The front face (14) thereof forms the corresponding closing surface of the piston (2) and is abutted against a seating surface (15) of the corresponding valve chamber (6;7) when the piston (2) is in the closed condition, where the sizes of both valve seals (13) are identical and both control chambers (11; 12) are connected to a control valve (22), by means of control pressure lines, which is connected to a control pressure reservoir (21).
The valve device, for injecting compressed air into a blowing volume of a parison with a first pressure supply (P1) and a second pressure supply (P2) and with inlet and outlet lines which may be closed by valves, comprises three switching valves (U1, U2, U3). A first switching valve (Ul) with two inlets (U1E1, U1E2) and one outlet (U1A) is provided in the supply region, the first inlet (U1E1) being connected to the first pressure supply (P1) and the second inlet (U1E2) to the second pressure supply (P2) and the outlet (UlA) to a first inlet (U2E1) of the second switching valve (U2), the outlet (U2A) of which is connected to the blowing volume. A second inlet (U2E2) to the second switching valve (U2) is connected to the outlet (U3A) of a third switching valve (U3) the first inlet (U3E1) of which is connected to atmosphere (EXH) and the second inlet (U3E2) of which is connected to a pressure recycle system (REC). The switching valves (U1, U2, U3) have a valve piston (2) designed as a hollow body, the cavity (3) of which is permanently openly connected to the outlet (30; U1A, U2A, U3A) of the relevant switching valve (U1, U2, U3).
The present invention relates to a valve with a housing (1) and a piston (2), wherein the piston (2) has a channel (3) connecting the two end faces (4; 5) and a piston ring (9) which protrudes radially outward and which is arranged on the outside of the piston (2) and is disposed between the two end faces of the piston (2). A ring-shaped, axially aligned valve seal (13), the end surface (14) of which forms the closing surface (15) of the piston, is disposed on one of the two end faces (5) and, in the closed state of the piston (2), is in contact with a seating surface (15) of the corresponding valve space (7). Furthermore, the piston (2) and the valve seal (13) are dimensioned and disposed in such a way that the active areas (16; 17) thereof are practically equalized in the open state of the piston (2) and, in the closed state, the active area (16) of the end face (5) in the region of the valve seal (13) is smaller than that of the opposite end face (4).
The present invention relates to a valve device for blow moulding machines for blowing compressed air via a blow cylinder (2) into a blow volume with two different pressure levels (P1 and P2), with a pre-blowing valve (8), a main blowing valve (5) and a venting valve (6), wherein the pre-blowing valve (8) is connected to a first pressure feed (P1) and the main blowing valve (5) is connected to a second pressure feed (P2), wherein the first pressure feed (P1) has a lower pressure level than the second pressure feed (P2). In this case, the pre-blowing valve (8) and the main blowing valve (5) are arranged such that they act parallel to each other and the pre-blowing valve (8) is configured as a multiway valve, wherein the first inlet line (9) has a restrictor (12) and a nonreturn valve (13), acting against the feeding direction, and the second inlet line (10) has a nonreturn valve (14), acting in the feeding direction, wherein the outlet line (11) is connected to the outlet line (5') of the main blowing valve (5) and the inlet line (b1) of the venting valve (6). Consequently, the pre-blowing valve (8) can be advantageously used both for the actual pre-blowing process and for the recovery process, whereby the dead volume for the venting does not have to be increased by providing an additional recovery valve.
09 - Appareils et instruments scientifiques et électriques
42 - Services scientifiques, technologiques et industriels, recherche et conception
Produits et services
Valves (parts of machines). Solenoid valves (solenoid switches); electromagnetic coils. Research and design services, in particular technical
research and mechanical research as well as technical
project studies.
