Abstract: The mould top support (3) for shaping the bottom of a thermoplastic bottle by what is called the “boxed top” process comprises: a base (10) interposed between the said mould top (3) and a sliding bolster (11) which is guided on the frame (6) of the mould carrier unit, which base (10) is made in the form of a dual-acting cylinder actuator, the rod (14) of which supports said mould top (3). The base plate (17), which closes off the cylinder of the actuator is provided with a rapid assembly finger (18) on the bolster (11). This base plate (17) includes, around the finger (18), on the one hand, holes designed to allow the sealed passage of nozzles that deliver a heat-transfer fluid and demoulding air into the mould top (3) and, on the other hand, zones for the attachment of the feed nozzles for the chambers (21 and 22) of the cylinder actuator, which nozzles are all placed parallel to the axis x-x? of displacement of said mould top (3).

Abstract: An device for molding plastic preforms into plastic containers comprises at least one blow mold and a plurality of closure members interacting with one another in order to transfer the blow mold between an open state and a closed state. The blow mold forms a cavity, within which the plastic preforms may be expanded into the plastic containers. The closure members comprise at least one first mold part and one second mold part, which are moveable with respect to one another. The closure members further comprise a blow nozzle unit which is moveable with respect to the mold parts, and which closes the blow mold in the closed state in one direction. At least one first drive unit moves the mold parts with respect to one another. A second drive unit moves the blow nozzle unit with respect to the mold parts. At least one drive unit moving at least one of the closure members for transferring the blow mold between the closed state and the open state includes an electric drive unit.

Abstract: An apparatus and method for forming a plastic container is provided. The method includes disposing a preform into a primary mold cavity and applying pressurized air to urge the preform to conform to the shape of the primary mold cavity to form a primary article. The primary article is then permitted to shrink to a predetermined volume. The method can further include exposing the primary article to an internal vacuum to facilitate shrinking to a predetermined volume. The method further includes disposing the primary article into a second mold cavity and applying pressurized air to urge the primary article to conform to the second mold cavity to form an intermediate article. Finally, at least a portion of the intermediate article is trimmed off to form a final container.

Abstract: An injection blow molding machine having an injection molding rotor including a plurality of injection molding units with individual split mold cavities for preforms, a transfer rotor, a blow molding rotor including a plurality of blow molds, and a removal rotor, essentially within a shared operating plane, and split mobile neck molding parts which fit into each blow mold and each mold cavity and which are transferred with a preform and removed with a stretch-blown bottle from the blow mold. In the process, each preform is transferred in the neck molding part into the blow mold.

Abstract: The invention relates to manufacturing thermoplastic material containers (2) with a petaloid bottom (4) by drawing-blowing hot preforms (16) in a blowing mold that has a petaloid mold bottom (1) including radiating ridges (13) alternating with cavities (11) that are adapted to form the valleys (7) and the feet (5), respectively, of the container bottom; during drawing, heat losses are reduced in longitudinal zones (19) of the end part (20) of the preforms, extending over the bottom (18) and over an axial portion of their body (21), distributed over the periphery of the ends of the preforms facing respective cavities (11) of the mold bottom (1).

Abstract: A stretch rod for a blow molding machine is disclosed, the stretch rod having an elongate member having spaced apart ends and a generally conically-shaped end formed on an end of the elongate member. The end has a tip having a first radius of curvature, a first portion adjacent the tip having a second radius of curvature, a second portion adjacent the first portion having a third radius of curvature, and a third portion adjacent the second portion fixing the end to the elongate member having a fourth radius of curvature.

Abstract: An apparatus for forming a container comprising a housing and a rod apparatus disposed in the housing. The rod apparatus includes a rod for at least partially forming a container preform. The apparatus further includes a nozzle system disposed in the housing that is operably coupled with the rod apparatus. The nozzle system is positionable between a first position preventing pressurized fluid from being injected into the container preform and a second position permitting pressurized fluid to be injected into the container preform.

Abstract: A mold device and a method related thereto for forming a plastic container from a preform. The mold device comprises a mold defining a mold cavity, a stretch initiation rod system for engaging an interior portion of the preform to define a stretch initiation area, and a centrally disposed pressure source positionable within the preform for introducing a pressurized fluid.

Abstract: A stretching rod holding arrangement may include a stretching rod for expanding plastic containers, wherein the stretching rod has an elongate rod-shaped main body and a holding body, which protrudes with respect to this rod-shaped main body in a radial direction of the rod-shaped main body. The arrangement comprises a receiving space for mounting the stretching rod, wherein at least one region of the holding body can be received by this receiving space, and the receiving space has a lower boundary wall in the longitudinal direction of the stretching rod. An opening is provided in this lower boundary wall, through which opening the main body of the stretching rod can pass. An arresting mechanism, which can be moved with respect to the receiving space between at least two positions, may be provided above the lower boundary wall in the longitudinal direction of the stretching rod.

Abstract: An apparatus comprises a blow-moulding mould arrangement arranged for expanding a preform to obtain a container, said blow-moulding mould arrangement comprising a die arrangement cooperating with a punch arrangement, the apparatus further comprising a compression-moulding mould arrangement comprising a further die arrangement cooperating with said punch arrangement for compression-moulding plastics to obtain said preform.

Abstract: An apparatus for shaping plastic preforms into plastic containers, including a plurality of blow moulding stations which each have a cavity in which the plastic preforms can be shaped into plastic containers. The blow moulding stations are arranged on a movable carrier and each have a stretching rod which stretches the plastic containers in their longitudinal direction by a movement in a stretching direction. A fluid-actuated drive device is provided for driving the stretching rod in the stretching direction. The apparatus includes a guide cam which is arranged in a stationary manner and by means of which the stretching rod can be moved counter to the stretching direction as a function of a movement of the blow moulding station. At least one portion of the guide cam is adjustable and, for example, by virtue of this adjustment a dependency of the movement of the stretching rod on the movement of the blow moulding station can be varied.

Abstract: The invention relates to manufacturing thermoplastic material containers (2) with a petaloid bottom (4) by drawing-blowing hot preforms (16) in a blowing mold that has a petaloid mold bottom (1) including radiating ridges (13) alternating with cavities (11) that are adapted to form the valleys (7) and the feet (5), respectively, of the container bottom; during drawing, heat losses are reduced in longitudinal zones (19) of the end part (20) of the preforms, extending over the bottom (18) and over an axial portion of their body (21), distributed over the periphery of the ends of the preforms facing respective cavities (11) of the mold bottom (1).

Abstract: An injection/stretch blow mold clamping mechanism comprises mold clamping shafts erected vertically movably on both sides of an injection molding operation section and extending through the lower base platen and upper base platen, hydraulic mold clamping means connected respectively to lower ends positioned within a bed of the clamping shafts, a mold clamping platen having core molds attached thereto and being fitted on the mold clamping shafts, the clamping platen being installed vertically movably between the upper base platen and a top platen, a pair of mold air cylinders connecting on both sides thereof the upper base platen and the clamping platen with each other and causing the clamping platen to move vertically with respect to the upper base platen, a mold clamping rod connected to the mold clamping platen through the top platen, and a pair of clamp members disposed on an upper surface of the top platen.

Abstract: 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).

Abstract: A stretch rod used for forming a preform into a hollow body having in its surface a plurality of raised portions and/or recesses relative to the circular cylinder shape, whereby the stretch rod tip can come into contact with the concave, rotationally symmetric inner surface of the preform at a plurality of locations which are separate from one another. Also, a method and an apparatus for forming a preform into a hollow body, which uses such a stretch rod.

Abstract: An injection stretch blow molding system with rotating and linear conveying functions includes a lifting and rotating mechanism, an injecting mechanism, a conveying mechanism, an extending and blowing mechanism installed at a third operating position, and a pushing mechanism installed at a second operating position. The lifting and rotating mechanism has a lifting seat, a rotating plate, and two bottleneck seats. Each of the two bottleneck seats has at least one bottleneck mold, with the rotation of the rotating plate, positions of the two bottleneck seats are selectively interchanged between a first and the second operating positions. The injecting mechanism has a female mold and a core mold installed at the first operating position. The conveying mechanism has a conveying seat connecting the two bottleneck seats whose bottleneck mold clamps a preform is installed at the second operating position. The conveying seat is driven by a convey driving device.

Abstract: The invention relates to a blowing or stretch-blowing device (1) for making vessels from thermoplastic blanks with a collar, that comprises a blowing nozzle (3) mobile between an upper position and a lower position for blowing a pressurised fluid into a blank having a body provided in the moulding cavity of a mould and having a collar protruding outside the mould, the device includes a clamping means (4) provided above the mould and capable of holding a blank by the collar thereof, a holding means (20, 21) for the clamping means for moving the same between two raised or lowered positions, wherein at least one branch (7, 8) of the clamping means being transversally mobile; mechanical coupling means (5) provided between the clamping means and the blowing nozzle and capable of synchronising the movements of the clamping means with the movement of the blowing nozzle.

Abstract: Process for manufacturing a plastic hollow body, the process comprising the following steps: a) a tubular stream of molten plastic is extruded; b) this stream is taken up by means of a tensioning device; c) a transverse cut is made in this stream so as to create a parison having one free edge that is not taken up by the tensioning device; d) the parison is moved relative to the tensioning device so that the free edge of the parison is also taken up by the tensioning device; and e) at least one longitudinal cut is made in the parison over its entire length. Equipment suitable for implementing this process.

Abstract: Disclosed are a method and a device for blow forming containers (2). A parison (1) is stretched by means of a stretching rod (11) within a blow mold and molded into the container (2) by applying blow pressure following thermal conditioning. Pressurized gas is introduced into the container (2) through the stretching rod (11). The pressurized gas is laterally introduced from a pressure chamber into an interior space of the stretching rod (11). The stretching rod comprises at least one passage opening (53) between a tip (51) facing the blow mold and an end (52) of the stretching rod, which faces away from the blow mold. Said passage opening (53) extends into the interior space of the rod so as to deliver the pressurized gas.

Abstract: A moulding unit for a plant for blow-moulding plastic containers (2), particularly bottles, from respective parisons (3) is equipped with an interchangeable mould (16) having at least one cavity (19) for blow-moulding a respective container (2), and at least two stretching rods (33) mobile along a predetermined line (24) to engage respective parisons (3) and to axially deform the parisons (3) themselves; the stretching rods (33) being selectively mobile according to the number and/or position of the moulding cavities (19) of the mould (16) mounted on the moulding unit at a given time.

Abstract: The invention relates to a fluid flow control assembly for a container blowing machine, comprising: a blow pin (1); a plurality of pipes for the circulation of a blowing fluid, which enable the blowing fluid to flow between at least one blowing fluid source, at least one fluid discharge outlet and the aforementioned blow pin (1); and valves which can control the flow of the blowing fluid inside the plurality of fluid circulation pipes. The invention is characterized in that the valves are all placed on the front of a body (3) housing the blow pin (1).

Abstract: The invention concerns a unit (6) for molding containers (2), comprising: a pair of half-molds (9), mounted respectively on two supports (10) mobile in horizontal translation; a primary transmission (19) controlling the movement of the supports (10); a mold base (14) mounted on a support (15) mobile in vertical translation; a secondary transmission controlling the movement of the mold base support (15); a locking device (16), comprising two mobile locks (17) co-operating each with a half-mold support (10); a tertiary transmission (21) controlling the movement of the locks (17). The transmissions include cams mounted on a common shaft, respectively coupled to the half-mold supports, to the mold base support and to the locks.

Abstract: A process and a device for the manufacture of a hollow body, particularly of a heat-resistant hollow body, which is molded out of a heated preform of thermoplastic plastic in a contoured blow mold through the introduction of a first medium into the preform, which medium is stored in a first medium storage unit and is under a pressure (p1) (preblowing phase), and the more or less simultaneous stretching of the hollow body through a stretching rod and the introduction of a second medium in the hollow body, which medium is stored in a second medium storage unit and the pressure of which (p2) is higher than the pressure of the first medium (p1) (final blowing phase), and which is cooled by a third medium, which is medium stored in a third medium storage unit (rinsing phase), whereby the preblowing medium is under a pressure of approximately 2-20 bar, the final blowing medium is under a pressure of approximately 15-45 bar, and the cooling medium is under a pressure of approximately 30-45 bar.

Abstract: The present invention relates to a base assembly (100) for forming a base portion of a plastic container. The base assembly comprises a base pedestal (104), a base mold attached to the base pedestal, a push rod (102) movable between a first position and a second position with respect to the base mold to reposition a portion of the plastic container, and an activation mechanism adapted to move the push rod between the first position and the second position.

Abstract: A catheter inflatable member forming mold can include first and second frames that mate to define a mold cavity, the mold cavity defining a main cavity portion and a bulge cavity portion, the mold cavity being sized to receive an elongated tube member therein. The mold can also include a pin member with a head portion positioned in the mold cavity, the pin member extending into the mold cavity, the head portion of the pin member being moveable in a first direction to contact and move the tube member towards the bulge cavity portion of the mold cavity during molding.

Abstract: A blow molding machine for producing hollow bodies, particularly wide-necked containers, having a blow nozzle and a blow mold for accommodating a preform. To save air during the blowing process in a simple way, a plunger is introduced into the preform during the blowing operation.

Abstract: Device for moulding thermoplastic containers by blow-moulding hot preforms, comprising a mould (1) and blow-moulding means (2) comprising a bell nozzle (8) which is axially displaceable between a raised position and a blow-moulding position in abutment against the mould; the driving means comprising mechanical means (12) with a cam follower roller (13)/cam (14) and pneumatic means (16) with a piston (18) integral with the upper end of the nozzle and sliding in a fixed enclosure (17), defining therein an upper chamber (19) connected to a source (24) of control fluid and a lower chamber (20) connected to this source and to the upper chamber via a solenoid valve (26); the upper face of the piston has a surface area which is greater than that of its lower face and that of the bell (9) of the nozzle.

Abstract: The invention relates to a station for the stretching/blowing of preforms having an upward-facing open end. The inventive station comprises a bracket that supports a blow mould, a stretch rod and means for controlling the movements of the stretch rod. The aforementioned control means comprise: (i) an actuator, and (ii) a roller and a speed control cam, said roller coming into contact with the speed control cam as the stretch rod enters the blow mould, thereby controlling the speed with which the stretch rod enters the blow mould. The invention is characterised in that the speed control cam is disposed below the base of the blow mould.

Abstract: The invention relates to a device for injecting compressed air into a parison, having an injection cylinder, having a hollow shaft arranged inside the housing 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 and provided with a connection head for the tight connection to the parison, and having a stretching rod arranged coaxially to the hollow shaft in the interior of the hollow shaft and displaceable coaxially with the hollow shaft. A double piston is arranged axially parallel to the hollow shaft. The double piston is connected to the hollow shaft by a connection lug and thereby moves the hollow shaft along its longitudinal axis (A) between a lower and an upper end position. According to the invention, the active surfaces of the double piston are each arranged in a control chamber connected to a separate control line, which are configured in the housing of the injection cylinder.

Abstract: A device for the stretch blowing of plastic containers in a continuous single-stage process, having at least one injection rotor, with injection molds for preforms, which are fed via controlled valves from an extruder head and by way of a melt distributor from a central extruder, wherein the axis of the extruder is placed at least essentially in the axis of the injection pipe, and at least the extruder head and the melt distributor can be permanently and synchronously rotationally driven by the injection rotor. A method where, during the manufacture of each preform in the injection mold, injection molding phases and a compression molding or dwell pressure phase are combined and superimposed.

Abstract: The present invention relates to a blow-molding installation for manufacturing thermoplastic hollow bodies by blow-molding or stretch-blow-molding containers (37) in a molding cavity of a mold, this blow-molding installation comprising a double-acting nozzle actuator (1) with two stages in series, equipped with two pistons (5, 6), these being an upper piston and a lower piston respectively, the nozzle (15, 16) being fixed removably, and pneumatic control means being designed to make said pistons (5, 6) slide according to a first operating mode used when the nozzle (15) is of the type that makes sealed contact with the mouth of the neck of the container, and a second operating mode used when the nozzle (16) is of the bell type with sealed contact against the surface of the mold in which the container (37) is placed.

Abstract: The method and device are used to blow form containers. A preform is elongated by means of an elongation bar after thermal conditioning inside a blow mould and is moulded into a container under the effect of the blow pressure. Initially, a first blow pressure provided by a low pressure supply is used, followed by a higher pressure provided by a high pressure supply (43). The blow air is supplied via at least one blow pressure valve and at least one part of the high pressure blow air is fed into the low pressure supply after the container has been formed. The reintroduction of blow air into the low pressure supply is controlled by means of a return valve (47) which is mounted parallel to the blow pressure valve. An outlet of the return valve is connected to the low pressure supply.

Abstract: A process for simultaneously coating and forming a body. The process includes moving two mold halves into contact with one another; introducing an injection-molding material into the mold halves so that a molding is formed; evacuating the molding; admitting a gas into the molding; igniting a plasma in the molding so that a coating is deposited on the inner side of the molding; and moving the mold halves apart so that the molding drops out.

Abstract: A syringe for use in a pressurized injection of a fluid includes a syringe barrel including a polymeric material having undergone expansion via blow molding. An inner diameter of the syringe barrel can, for example, be sufficiently constant (over at least a portion of the axial length of the syringe) that a plunger slidably positioned within the syringe barrel and in generally sealing contact with an inner wall of the syringe barrel can be used within the syringe barrel to generate a pressure of at least 1 psi within the syringe barrel. In several embodiment, the inner diameter of the syringe barrel is sufficiently constant to generate a pressure of at least 100 psi, at least 300 psi, or even at least 500 psi within the syringe barrel.

Abstract: A blow moulding machine (10) for the manufacture of containers based on preforms, includes at least one rotating turntable (12) furnished with a console (16) supporting two half-moulds (20, 22) that are designed to form the body of the container and a mould base (32) that is designed to form the bottom of the container, of the type in which the mould base (32) is driven so as to slide vertically by a cam system (46), characterized in that the console (16) includes at least one return member that forces the mould base (32) towards its top position, and in that the cam system (46) includes a cam follower element (52) that is slidingly connected to the mould base (32) and that interacts with a control surface (54) oriented downwards.

Abstract: The invention proposes a device (10) for transferring items (3) from an items (3) loading station (13) to an items (3) unloading station (14), which comprises: a group (18) of modules (19a-d) mounted such that they can move in a longitudinally direction, able to adopt a contracted configuration in which the modules (19a-d) are separated by a first spacing (pl), and a deployed configuration in which the modules (19a-d) are separated by a second spacing (F), means (34) of linking one module (19a) to another (19b), comprising a lever (38) mounted such that it is articulated on a first module (19b) and connected to a second module (19a), this lever (3) furthermore cooperating with a groove (46) having an intermediate section (46c) forming an angle with the direction of movement of the group (18) of modules (19a-d), and means (35, 36) of controlling the movement of the group (18). Application to the transfer of blanks from a heating station to a station for molding receptacles from blanks.

Abstract: An injection stretch blow molding apparatus includes a lower base which is secured on a stage, an upper base which is disposed above the lower base and supports a turntable, and vertical clamping device that raises and lowers the upper base with respect to the lower base. The vertical clamping device includes a pulling plate disposed in the stage under the lower base, a plurality of tie rods which pass through the lower base and connect the upper base and the pulling plate, a vertical clamping toggle mechanism which is disposed in the stage at a position under the injection molding section and expands and contracts with respect to the lower base as a reference position to raise and lower the pulling plate, and a first motor which transmits a driving force to the vertical clamping toggle mechanism.

Abstract: The inventive carousel-type rotating machine includes a rotating frame bearing several work stations, a power and fluid supply rotating column which is coaxial to the axis of the rotating frame and incorporates a rotatable electric collector connected to a fixed power source for supplying power to the work stations and a rotatable fluid connection connected to a fixed fluid source for supplying fluid to the work stations, wherein the rotatable fluid connection is disposed on the top of the rotating column above the rotatable electric collector, thereby having the reduced diameter of the part thereof rotatable at reduced linear speeds between the fixed and rotatable parts thereof.

Abstract: A device and a method used to temper preforms in the manufacture of bottles, in which a tempering device is provided to selectively and directly temper the preforms, and is inserted into preforms. The method provides that the preforms are directly tempered from the inside.

Abstract: A method comprises forming a preform of plastic material, expanding said preform to obtain a container, said forming comprising compression-forming said preform in that mould arrangement wherein said expanding occurs; a method comprises expanding a preform in a mould arrangement to obtain a container, before said expanding it being provided to form a dose of plastic material in a paste state in said mould arrangement to obtain said preform; an apparatus comprises a forming mould arrangement, a punch device for expanding a preform in said mould arrangement, an abutting device cooperating with said punch device, said punch device and said abutting device identifying a configuration in which said punch device and said abutting device cooperate to define a forming unit for compression-forming a semifinished product of plastic material to obtain said preform and a further configuration in which said punch device and said abutting device cooperate to define an expansion unit of said preform to obtain a container.

Abstract: A blow-molding or stretch-blow molding plant for making containers from thermoplastic polymer blanks, in particular PET, including a blowing bell-nozzle for blowing a pressurized fluid into a blank arranged in a cavity of a mold, the nozzle having one end adapted to be sealingly supported in front against a support plate provided in one surface of the mold capping the neck of the blank; the support plate is ring-shaped having an outline of similar shape as that of the outline of the end of the nozzle, the ring being engaged in a gutter which is hollowed out in the surface of the mold and which surrounds spaced apart the opening through which the neck of the blank passes.

Abstract: A composite mould set for use on a conventional type of injection-molding machine is made up of composite mold halves (10) which are mounted one on each platen (12) of the injection molding machine. Each mold half (10) carries an array of injection molding cavities (16) for molding preforms, and an array of blow molding cavities (18) for stretch blow molding of the preforms into a blow molded product. The respective cavities (16) and (18) are arranged so that they open in a common mold separation direction.

Abstract: A multilayer plastic container comprises a layer of a polypropylene and an intermediate layer directly adjacent the layer of polypropylene wherein at least one of the polypropylene and intermediate layers comprises an adhesive such as maleic anhydride incorporated therein to adhere the layer of polypropylene to the layer of EVOH.

Abstract: Apparatus for producing plastic containers by stretch blowing including a rotatable rotor and at least one distributor block connected to the rotor. The distributor block has a mixing chamber that can be directly connected to an internal space of a preform so that a combustion chamber is formed from the mixing chamber and the internal space of the preform. A feed device is provided for feeding an explosive fluid into the combustion chamber and a firing device is provided for firing the explosive fluid in the combustion chamber. Of importance is that the distributor block can be connected directly to a preform or to a formed container. The apparatus is desirably a round rotor machine with a rotatable carousel for receiving a plurality of distributor blocks having a mixing chamber that can be directly connected to an internal space of a preform. The distributor blocks are desirably arranged in such a way that they can be rotated together with the carousel.

Abstract: The invention relates to a method and to a device which is used to blow-form containers (2). A preform (1) is stretched inside a blow form (4) by a horizontal bar (11) after thermal conditioning and is shaped in the container by means of blow pressure effects. At least one part of the pressurised gas is guided towards the base area of the container (2). One particular advantage of said invention is that the flow path ends in the vicinity of the base area. At least one part of the pressurised gas (2) is guided into the container by the horizontal bar (11).

Abstract: An arrangement for removeably fixing a stretching rod (22) on a movable slide by an attachment device including a casing (24) and a bearing element (42) clamped onto the rod (22), characterized in that the top end section of the bearing element (42) is formed by at least two radial lugs (64) of rounded profile, in transverse section, which form a top transverse bearing surface (44), and in that the transverse profile formed by the peripheral edge (65) of the top opening (36) of the casing (24) substantially matches the profile of the lugs (64).

Abstract: A rotary machine for producing recipients made of a thermoplastic material by drawing and blowing performs by a molding device which is provided with an openable mold and a movable drawing rod, a device for supporting and driving the drawing rod, which is embodied in such a way that it is mechanical and includes a power take-off device for generating, on the basis of a monodirectional rotary rotation, two rotary motions of given angular amplitudes of a rocker in two predetermined angular places of a merry-go-round path and a device for converting the two rotary movements of the rocker into two opposite linear alternately descending and ascending displacements of a drive unit connected to the drawing rod.

Abstract: An injection stretch blow molding apparatus includes a lower base which is secured on a stage, an upper base which is disposed above the lower base and supports a turntable, and vertical clamping device that raises and lowers the upper base with respect to the lower base. The vertical clamping device includes a pulling plate disposed in the stage under the lower base, a plurality of tie rods which pass through the lower base and connect the upper base and the pulling plate, a vertical clamping toggle mechanism which is disposed in the stage at a position under the injection molding section and expands and contracts with respect to the lower base as a reference position to raise and lower the pulling plate, and a first motor which transmits a driving force to the vertical clamping toggle mechanism.

Abstract: Improvement of simplicity and durability of a stretch rod extending device and a bottom mold lifting device, equipped on a stretch blow molding machine, is achieved by applying a combination of a magnetic screw shaft and a magnetic nut member, which is able to convert rotary-linear movement smoothly without contact. The nut member and the screw shaft of the extending device 6 and lifting device 30 comprise a magnetic nut member 65, 116 and a magnetic screw shaft 66, 117, having spiral N magnetic pole and S magnetic pole alternately provided on inner peripheral surface of a cylindrical member and outer peripheral surface of a shaft at a same regular pitch. The magnetic screw shaft is inserted into the plunger 61, 115, having the magnetic nut member equipped inside with keeping required clearance so as to match the magnetic pole to oppose the magnetic nut member at the same poles each other.

Abstract: The installation for manufacturing objects such as receptacles by thermoforming pellets of thermoplastic material includes conveyor means for conveying the pellets through the various stations in the installation, said stations including a heating station and a thermoforming station. The conveyor means comprise conveyor elements (46) defining cells (48) which are open upwards and downwards, and each of which is suitable for containing one pellet (12) while the entire top and bottom faces of the pellet remain unobstructed, means for depositing the pellets in the cells, drive means for driving the conveyor elements through the heating station, and transfer means (20) for transferring the heated pellets to the thermoforming station. The heating station includes bottom heater means (52) that co-operate with a support for the pellets while said conveyor elements are being driven through the heating station.