Abstract: Provided is a swing-driving device for driving two low molding units so as to swing around corresponding swinging fulcrums, each of the blow molding units having a carriage, one end portion of which is supported by the swinging fulcrum so as to swing, and a blow molding mold disposed on the carriage. The blow molding mold of one blow molding unit receives a parison on a common receiving position and is made to be an mold close state. The blow molding mold swings around a swinging fulcrum, and moves from the receiving position to a shunting position via a detaching position. Thereafter, the blow molding mold returns to the detaching position and is made to be a mold open state. A hollow article formed by blow-molding the parison in the blow molding mold is take out and moved to the receiving position kept in the mold open state.

Abstract: An accumulator-type blow molding machine includes hydraulic cylinders for closing mold parts on platens and a control system for valves flowing hydraulic fluid to the cylinders. The control system calculates the desired position of one platen from the measured position of the other platen and generates work output signals accordingly.

Abstract: A moulding member defining a portion of a mould cavity for blow moulding an article in blow moulding apparatus, wherein said moulding member includes: (a) a backing member (5, 19) fixable to said blow moulding apparatus and having a wall which defines a recess in said backing member, and (b) a removable insert (3, 47) located in said recess and having a surface defining a portion of said mould cavity (11), wherein said backing member (5, 19) and said insert (3, 47) are located in register relative to each other by way of cooperating locating means (17, 73) on said insert and said backing member, respectively.

Abstract: A mold-clamping device for a blow molding machine. The device includes a body and tie bars which move forwardly and backwardly while supported in a horizontal posture by the body. It also includes front and rear platens which are disposed on the front and rear end portions of the tie bars. A movable platen which is forwardly and backwardly movable is also disposed on the tie bars in such a manner as to face the front platen. Split mold halves are disposed on opposite sides of the front platen and the movable platen. The body portion is provided with a crank mechanism and a driving source so that the driving force transmits a driving force to a crank shaft of the crank mechanism. The rear platen and the movable platen are connected to a crank arm of the crank mechanism through connecting rods.

Abstract: A method of manufacturing hollow bodies including inserting into spaced mold halves of a blow mold of a blow molding machine plastic hose-shaped blanks at an extrusion station of the blow molding machine and closing the blow mold, displacing the closed blow mold from the extrusion station to a calibration station of the blow molding machine, inserting thereat blow mandrels into respective cavities of the closed blow mold, lifting, after expiration of predetermined blow time, the blow mandrels, together with the blown hollow bodies to an intermediate position and removing the blown hollow bodies from the blow mandrels lifting the blow mandrels to their initial position thereof, and displacing the blow mold from the calibration station to the extrusion station, with the displacing of the blow mold between the extrusion station and the calibration station being effected by displacing the blow mold at a right angle to a connection line of arranged side-by-side cavities of the blow mold.

Abstract: A universal mold carrier for use in a mold assembly compensates for parting forces associated with container formation by directing a compensating air flow pressure to the rear surface of the mold carrier. The mold carrier includes two mold halves adapted to matingly engage each other and hold within the mold carriers interchangeable mold shells. One of the mold carriers has an outside wall that has a plurality of independent air flow compensating surface areas located thereon. This mold carrier further has an air flow communication line interconnecting the independent air flow compensating surface areas. Shut off valves are located in the one carrier to close and to open the air flow communication line between adjacent independent air flow compensating surface areas to allow for adjustment of the compensating pressure.

Abstract: A neck ring arm assembly for a glass container forming machine of the individual section type comprising a horizontally extending invert shaft and a vertically extending cylinder with a rack that engages a spur gear attached to the invert shaft to oscillate the invert shaft. The invert shaft has an inner annular sleeve keyed to it, and the inner annular sleeve has a polygonal exterior, preferably a hexagonal exterior. First and second outer annular sleeves surround the inner annular sleeve to be oscillatable therewith, but reciprocable with respect thereto. Each of the first and second outer annular sleeves has a polygonal interior which is complementary to the polygonal exterior of the inner annular sleeve, and each is provided with a plurality of replaceable wear pads each of which is adjustable toward a surface of the polygonal exterior of the inner annular sleeve to provide for close, low backlash engagement of the inner annular sleeve by the outer annular sleeves over a prolonged duration.

Abstract: An injection blow molding machine utilizing an extruder and having interchangeable machine tooling components, for manufacturing injection blow molded articles of different configurations and sizes, includes a stationary machine platen; a movable machine platen which is movable toward and away from the stationary machine platen along a machine axis, to close and open a mold; opposite support rails mounted to the movable platen; a shuttle plate mounted on the movable machine platen between the opposite support rails for movement with the movable machine platen and movable perpendicular to the machine axis and having a rear surface in close proximity to the movable machine platen; core pin retainers mounted on the shuttle plate for movement therewith, each core pin retainer holding an interchangeable core pin that receives a parison to be blown into a bottle; slides movably mounted on the shuttle plate for movement with the shuttle plate and movable toward and away from each other in close proximity to a front

Abstract: An accumulator-type blow molding machine includes hydraulic cylinders for closing mold parts on platens and control systems for valves flowing hydraulic fluid to the cylinders. The control systems generate work output signals for the valves according to the operational parameters of the valves, the hydraulic systems and the bearings supporting the platens.

Abstract: A device for blow molding or stretch-blow molding containers from thermoplastic preforms. The device comprises a book mold (2) and actuating means (5) for opening and closing the two pivotable mold halves (3), including a movable arm (7) freely rotatable about an axis (8) and secured to the two mold halves (3), and drive means synchronized with the feed rate of the preforms into the mold and designed to actuate guide means having a cam (13) and a cam follower (12) for moving the arm (7) to control the opening and closing of the mold (2).

Abstract: A quick change system and method of interchanging molds on plastic extrusion blow molding machines is disclosed wherein a universal standard subplate is provided for use with different blow molding machines on which a variety of different mold units are removably mounted on the standard subplate with the subplate establishing a preselected precisely aligned relation automatically between the mold unit and a machine platen. A quick release locking device is provided between each mold unit and a unitary standard water manifold and detabber assembly. The unitary standard assembly is provided as a one-piece component with fluid connections communicating respectively with water and air supply sources of the water manifold and detabber and which are conveniently maintained attached without being disconnected during detachment of the unitary standard assembly from the mold unit during a mold change.

Abstract: A blow molding machine, includes a base frame, a blow mold adapted for receiving a tubular parison and having a first mold support plate for support one mold half and a second mold support plate for support of another mold half. A transport unit is mounted to the base frame for so moving the first and second support plates that the mold halves are free from any direct, form-fitting coupling, with the transport unit including a first drive mechanism operatively connected to the first support plate and a second drive mechanism operatively connected to the second support plate and operating independent of the first drive mechanism. Secured to the support plates is a locking mechanism for pinching off the tubular parison and clamping the mold halves during the blow molding operation.

Abstract: A method and apparatus wherein an extruder provides extruded plastic parisons to a first and second horizontally movable blow mold assemblies, and each blow mold assembly includes two sets of blow molds, and each set includes a pair of blow mold halves. The blow mold halves are closed about the tubular parisons and moved to one of two blow molding stations where a blow pin at the blow molding station blows the parison to form a hollow blow molded article. More specifically, four platens are provided in each blow mold assembly. A first pair of outer and inner platens supports the first pair of blow mold halves and a second pair of outer and inner platens supports the second pair of blow mold halves. A pair of tie rods passes through all four platens. The first outer platen is attached to the ends of the tie rods. The second outer platen is moved by a mechanism such as a cylinder or toggle mechanism for movement on the tie rods.

Abstract: The invention concerns a device for producing thermoplastic containers, in particular bottles, by the blow-molding or stretch blow-molding of a preheated preform. The device comprises at least one mould consisting of two half-molds (2) each supported by a mould carrier, the two mould carriers being movable relative to each other. Each half-mould (2) comprises a shell holder (9), supported by the respective mould carrier, and a shell (7) which is equipped with a half-impression (8) of the container to be obtained and can be rendered integral in a detachable manner with its shell holder (9) by rapid-fastening means (19-23). The shell (7) and the shell holder (9) are of complementary shapes such that they contact each other at least partially for heat conduction purposes whilst the pipes and connections for circulating and/or heating fluids are provided in the shell holder alone.

Abstract: A cross head mounted at an end portion of an extruder for extruding a parison between a pair of elements of a metallic mold and a filling nozzle lifting apparatus having a filling nozzle are provided in parallel, and opening and closing of the metallic mold by a mold clamping apparatus, back and forth movement of the mold clamping apparatus between a parison receiving position and a filling position by a metallic mold feeding apparatus, upward and downward movement of the filling nozzle and back and forth movement of a parison cutter of a parison cutting apparatus are electrically operated. Further, a metallic mold body of the metallic mold is formed from a ventilation material, through which air in the metallic mold is sucked by vacuum to expand the parison. Furthermore, a clean air box is constructed so that it can accommodate the filling nozzle, and clean air is jetted from a jetting hole provided in a lower wall of the clean air box so that a clean air atmosphere may be provided above the metallic mold.

Abstract: The present invention refers to an injection moulding machine including an injection moulding tool which includes at least one female die and one male die. A blow moulding tool is arranged in closely spaced relationship with the injection moulding tool. A transfer member is arranged between the injection moulding tool and the blow moulding tool, the transfer member being used for transferring a preform from the injection moulding tool to the blow moulding tool. The movement of the transfer member is synchronized with the opening and closing movements of the injection moulding tool and of the blow moulding tool in such a way that said transfer member moves into the tool area of the open injection moulding tool, removes the respective preform from the male die or from the female die, moves out of the tool area and introduces the preform into the blow moulding tool that is open to an adequate extent.

Abstract: A rotary blow molding machine includes a horizontal main shaft with a plurality of molds spaced around the shaft and mounted on the shaft by linear bearings for movement along the shaft. A shaft drive rotates the shaft and molds around the axis of the shaft in the steps and dwells the shaft and molds between steps. Open molds are rotated from a lower container eject position up to a parison capture position and then close on a parison. The closed molds are shifted axially along the main shaft and the parison is blown. Further rotation of the shaft returns the molds to the mold eject position where the molds open and molded containers are ejected downwardly with gravity assist.

Abstract: A mold closing device without cross-beam for a molding machine, e.g. injection molding or blow molding is disclosed. The mold closing device has a U-shaped machine frame with two arms defining a horizontal injection plane and a movable positioning device located within the first arm and moving along the injection plane; a moveable adapter plate including a vertical mold mounting surface, located on the positioning device; a fixed adapter plate with a vertical mold mounting surface on the second arm and on the injection plane; a first mold die-half is attached to the essentially vertical moveable adapter plate; a second mold die-half is attached to the essentially fixed adapter plate; and one of the arms includes a weakened cross-section for providing a controlled deformation of the machine frame resulting from the occurring closing and holding forces during operation of the molding machine and for maintaining the mold mounting surfaces vertical.

Abstract: A process and an apparatus for producing hollow bodies of thermoplastic material by a blow molding procedure use a blow molding mold comprising at least two portions, with at least one means by which the mold portions are urged towards each other in the mold-closing direction and are locked together when the mold is closed. The locking means carries a large part of the forces resulting from the blow molding pressure and possibly also at least a part of the forces required for squeezing surplus material off the preform to be expanded in the mold. The forces applied by the locking means are transmitted to the mold portions, with the interposition of at least two spaced-apart hydraulic force-transmitting means. The hydraulic force-transmitting means are hydraulically connected together in order to render uniform the forces which act on the mold portions.

Abstract: A method and an apparatus for closing the tool of a plastics-processing machine, especially a blow-molding machine, concerns a two-part tool (1, 2) which is supported by two tool mounting plates (3, 4), at least one run drive (5), at least two closure drives (8), and such that the closure drives (8) each have a hydraulic piston-cylinder system with a cylinder (9), a piston (10), and a cylinder rod (11), and such that an inflow (14) and an outflow (15) for hydraulic oil is situated at the cylinder (9). Also, the end of the piston rod (11) has an interlock element (12) which interacts with a counter-piece (13), such that the piston rod (11) does not interlock with the closure piece (13), in order to apply the closure force, until the tool (1, 2) is situated near its closed position.

Abstract: The invention concerns a press for blow-molding. This press (10) comprises a frame (11) on which there are mounted two movable plates (12, 13), each supported a half-mold (14, 15) and actuated by a mechanism for opening and closing the mold, which is formed of the two half-molds. Each of the movable plates is attached to a beam mounted on two axles (19, 20) so that it slides along these axles in opposite directions. The opening mechanism essentially consists of an actuator, two transmission blocks (29) and two pairs of connecting rods (33) connected to said movable plates. When the actuator drives the transmission blocks (29) in the direction of arrow A, the rods cause the mold to close. When the transmission block turns in the direction of arrow B, displacement of the rods causes the mold to open. The invention has applications for high speed molding presses in which the mold must be opened in rapid cycles.

Abstract: Apparatus for blow-molding an article curved in three dimensions comprises two horizontally movable mold parts which, when in contact with each other, define a mold cavity curved in three dimensions to match the required article. An extrusion head extrudes a parison of synthetic resin material into the cavity so that it descends towards the lower end thereof. During this process, a first air flow is fed through apertures in a cover and passes through the mold cavity around the outside of the parison to ease the passage of the parison towards the lower end. In addition, a second air flow is fed through a nozzle in the extrusion head into the interior of the parison so as to help it descend and also to prevent its distortion as it moves into the mold cavity. Thereafter, closure members, which are slidable on, but movable independently of, the main mold parts, close off the upper and lower ends of the mold cavity and pinch the parison between them, their movements being controlled by respective actuators.

Abstract: A backplate assembly for supporting the molds of blowmolding machines having plural molds wherein the backplate assembly consists of two planar plates having a resilient elastic compressible cushion disposed therebetween to permit limited self-adjustment of the plates as determined by pressure produced upon the mold halves closing. The cushion is formed by an elongated spirally configured elastic resilient strand located within recesses formed in the plates, and the configuration of the strand may be related to the distribution of compressive forces imposed on the backplate assembly.

Abstract: A rotary plastic blow molding machine (10) includes a rotary wheel (14) mounted on a base (12) and having a plurality of mold stations (30) with mold supports (34) that are mounted by inner and outer slide supports (32a,32b) and moved by an operating cam mechanism (56) in association with a lock mechanism (62) and an unlocking cam mechanism (64) to provide blow molding of an extruded parison. The inner and outer slide supports (32a,32b) are preferably aligned radially with respect to the rotational axis of the wheel (14) and the operating cam mechanism preferably includes a pair of gas springs (98) for providing uniform pressure in the closing of the mold supported by the mold supports (34). A mold recompression mechanism (128) removes mold closing pressure from the lock mechanism (62) prior to operation of the unlocking cam mechanism (64) in preparation for mold opening after completion of the blow molding cycle.

Abstract: A blow-molding machine for producing hollow plastic articles comprises a blow mold having a plurality of cavities corresponding to the shape and dimension of the finished hollow articles. The blow mold has at least two closely adjacent and separate blow molds and an opening and closing system operatively associated with each blow mold. The machine is provided with a tube station and a blow station. The tube station has a plurality of tube-shaped parison-forming heads located parallel to and next to each other for filling each cavity with a parison. The number of cavities corresponds to the number of parisons. The blow station is offset relative to the tube station and thereat the parisons in closed blow molds are inflated to the finished hollow articles. A joint transportation system for moving all of said blow molds between the tube station and the blow station is provided.

Abstract: A blow molding apparatus including a clamp for clamping two molds in back-to-back relationship, the clamp having first and second movable, inner platens supporting interior sections of two molds; first and second movable outer platens supporting exterior mold sections facing the interior sections; a positioner to move the inner and outer platens between opened and closed positions; an extrusion means to extrude parisons between mold sections, injectors to inject air into the interior of the parisons; and a platen retainer to resiliently position the inner platens between the outer platens to equalize pressure in the two molds.

Abstract: In a blow molding process the mold halves are independently controlled and moved so that a parison may be extruded from an extrusion head and then one of two mold halves may be moved toward the parison. The parison may be grasped by a manipulator to manipulate a portion of the parison so as to overlie a second portion of the mold cavity. The mold is then closed and a standard blow molding procedure performed. The process enables production of reduced flash.

Abstract: A method and apparatus for forming plastic hollow articles such as containers which includes a turret that includes an upper head and a lower head, each of which supports circumferentially spaced sets of core rods. The heads are rotated about a vertical axis and also are moved upwardly and downwardly about the vertical axis for positioning the core rods within the cavities of upper injection mold and upper blow mold and a lower set of injection and a lower set of blow molds. Each mold has an upper half and a lower half. The lower half of the upper mold is mounted in fixed position and the upper half of the lower mold is mounted in fixed position. The upper half of the upper mold and the lower half of the lower mold are movable axially vertically toward and away from their respective fixed mold halves to close about parisons on the core rods.

Abstract: A composite molding device is provided at the same site for preforming a closed-end parison or controlling the temperature of the closed-end parison as well as stretch blow molding the preform or temperature-controlled parison to a final product, such as a bottle. The composite molding device applied for stretch blow molding includes a clamping device, a pair of first mold halves, and a pair of second mold halves. The pair of second mold halves are removably placed between the pair of first mold halves in the clamping device so as to use the clamping device as a common clamping device.

Abstract: In an apparatus for the production of hollow bodies from thermoplastic material by use of extrusion blow molding, having at least two blow molding units and an extrusion system, in an operating cycle each blow molding unit is movable between a receiving position in which the opened blow molding mold receives a preform and at least one other position in which the expanded hollow body is removed from the blow molding mold. Each blow molding unit is firstly moved from a station remote from the removal station in at least one direction into the removal station and opened after reaching the removal station, whereupon the hollow body previously produced in the blow molding mold is removed. The respective blow molding unit is then moved by use of a second movement in another direction, with the blow molding mold open, into the receiving position which is arranged laterally displaced relative to the path of movement along which the blow molding unit is moved into the removal station.

Abstract: A blow molding machine designed as a two station machine (10) has at least one extrusion device (12) and an accumulator head which supplies a tubular thermoplastic parison to two blow molds arranged next to each other and having two horizontally movable blow molding halves. In order to simplify the construction of the machine at reduced space and to achieve a high productivity, the blow molding machine according to the invention has only a three-platen system with three mold mounting plates (22, 24, 26) for clamping the four blow molding halves (14, 16, 18, 20).

Abstract: A blow molding apparatus including a clamp for clamping two molds in fixed, back-to-back relationship, the clamp having a central platen supporting interior sections of two molds in a fixed, back-to-back relationship, and first and second movable platens supporting exterior mold sections facing the interior sections. The apparatus also includes a clamp positioner to move the movable platens between opened and closed positions, an extruder to extrude parisons between mold sections, injectors to inject air into the interior of the parisons, and a central platen retainer to resiliently position the central platen between the movable platens.

Abstract: A non-hydraulic injection blow molding machine for making hollow plastic articles. The machine has a parison mold having top and bottom portions for injecting a parison onto each of a plurality of core rods, and a blow mold having top and bottom portions for blowing the parisons into hollow work pieces. The articles are removed from the core rods at an eject station. The core rods are mounted on a turret. The turret rotates to advance the core rods from the parison mold to the blow mold, and from the blow mold to the eject station. The machine has a rotating crank shaft. A translating mechanism translates the rotation of the crank shaft to a vertical reciprocating motion. A clamp beam is connected to the translating mechanism and is actuated by rotation of the crank shaft to move between raised and lowered positions which are separated by a fixed stroke.

Abstract: A blow mold assembly has a first and second carriage, and air cylinders for moving the first and second carriages along guide rods between an open position and a closed position. A first and second mold half are coupled respectively to the first and second carriages to define in the closed position at least one blow mold cavity. A lock situated on confronting surfaces of the first and second carriages locks the carriages together when the carriages are located in the closed position. The lock includes a pair of channel defining members coupled to one of the carriages having opposed edges including a series of teeth separated by interdental spaces, and a corresponding pair of cooperating toothed members coupled to another of the carriages and arranged to penetrate the interdental spaces. Each first mold half is movably mounted to the first carriage and is biased away from the second mold half.

Abstract: An apparatus for forming a hollow article, wherein all the operations such as shifting and opening/closing of a die are performed by electric actuators such as motors which operate in accordance with a program operation, thus improving the quality of the hollow article as the product. A parison extruded from an extruder is introduced into and held in a die which has been opened by the operation of a die compacting motor. A crosshead associated with the extruder is lifted to draw the parison, and a parison cutting motor operates to cut the drawn parison. Thus, fully automatic production is realized, to ensure high yield of the product.

Abstract: A method and apparatus for producing a hollow article having a blow molded portion and a compression molded portion. Plastic is extruded over a blow pin assembly to form a parison having an open end and a diameter larger than the diameter of the article's mouth. The blow pin is movable relative to the parison and includes a male mold member on its end. The male mold member has a molding surface corresponding in shape to the compression molded portion of the article. A cutting member is also provided on the blow pin. The cutting member is also movable relative to said parison. Once the parison is enclosed in a hollow mold, the male mold member of the blow pin compresses a portion of the parison between the second portion of the hollow mold and the molding surfaces of the male mold member so as to form the compression molded portion of the article.

Abstract: The device serves to apply a prestress to blow moulding elements mounted in the region of mould carriers. The blow moulding elements am adjacent to each other in the area of a mould seam and in each case regionally enclose an internal space, which is intended for shaping a container manufactured with a blow process. In an elastomer a positioning element is embedded at least regionally and is enclosed at a distance by a peripheral element. At least part of the elastomer is arranged between the peripheral element and the positioning element in order to form an elastic connection.

Abstract: A mold closure system for machines processing plastics material, such as blow molding and injection molding machines, includes an essentially U-shaped pedestal having two legs and cross ties connecting them at one of their ends as well as two mold carriers and holding or supporting respectively one mold half, which are disposed between the two free legs of the pedestal 2 so as to be mobile against each other. When the molding tool is closed, the two mold carriers are provided with their abutments at the legs. A special guiding arrangement also is present for guiding the mold carriers parallel to one another to carry their weight. The guidance arrangement includes at least one guide beam or support, parallel to the direction of motion of the mold carrier, wherein the mold carrier are supported upon the guide beam or support to be longitudinally mobile.

Abstract: A closure device for closing a mold tool for manufacturing objects from thermoplastic materials includes a frame including a first yoke, which supports directly one of the two displaceable mold plates supporting the halves of the mold tool, a second yoke remote from the first yoke and spaced tie and pressure rods extending between the first and second yokes. The ends of the tie and pressure rods, proximate to the first yoke, are rigidly connected with the first yoke and the opposite ends of the tie and pressure rods are hingedly connected to the second yoke. The closure device further includes a mechanical drive extending between the second yoke and the other of the two mold plates and a synchronization device for enabling synchronous displacement of the two mold plates.

Abstract: An apparatus for the production of hollow bodies from thermoplastic material by blow molding using a blow molding mold which includes at least first and second mold portions to enclose a generally tubular extruded preform which is expanded within the mold under the effect of an increased internal pressure within the preform. To provide for asymmetric closing and/or opening movements of the mold portions relative to the preform, the blow molding mold is displaced as an entirety parallel to the direction of the opening and/or closing movements of the mold portions, more especially during the mold closing and/or opening procedure, so that an additional motion is superimposed on the movements of the mold portions.

Abstract: This device is used for the blow moulding of thermoplastic synthetic material, with it having a blow mould consisting of at least two blow-moulding elements. The blow mould is provided with an internal space designed for shaping a produced container. The blow moulding elements are arranged in the region of pivotally seated mould carriers. The mould carriers are guided on a shaft and a locking device is provided in the area of the end of the mould carrier facing away from the shaft. In the region of their extension facing away from the locking device, the mould carriers project beyond the shaft by means of their actuating arms. The actuating arms are rotationally coupled to an adjusting element via coupling levers. The adjusting element is guided essentially in the direction of a center line of the blow mould.

Abstract: Apparatus for forming hollow plastics including reciprocable mold portions to form a blow mold movable from an open position to a closed position a holding device for holding the parison within the blow mold. An alignment device is provided for aligning the parison with the blow mold.

Abstract: An improved blow mold alignment system for aligning blow mold halves relative to one another. The system includes the alignment pins having a cylindrical tip section and conical following section on one blow mold half. Sockets for the pins are provided in a cooperating blow mold half. Each socket has a corresponding configuration for snugly engaging a pin in one end thereof and has an opposite open end which aligns with a channel created in the blow mold half. The channel terminates in an outlet formed in a wall of the mold half at a position subjacent that of the socket.

Abstract: A mechanism for opening and closing a portfolio blowing or stretching-blowing mold used to manufacture plastic containers. A stationary pin (4) supports two rotating half-molds (3), and two curved control arms (9) are joined at their one ends to the two half-molds on either side of the pin (4). A cam device includes a loose follower roller (16) on a support shaft (16a) parallel to the pin (4), and a guide cam (17) moves the roller perpendicular to (toward and away from) the pin (4). The connection between the roller and the other end of the two arms (9) includes a pair of normally parallel connection rods (13, 14) whose one ends individually support the shaft (16a) and a shaft (10) connecting the other ends of the arms (9), and whose other ends are mounted on a shaft (15) parallel to the shaft (4), the connection rods being oriented transverse to a mold joint plane (M) containing the pin (4) and the shaft (10).

Abstract: A mold locking system is provided for a glass molding machine. The machine has first and second mold hanger support arms for moving respectively first and second mold halves. The arms are pivotally cantilever-mounted at their ends for rotation about a vertical axis between a retracted station where the mold halves are separated and a forming station where the mold halves are brought into contact. The locking system includes a pressure system for exerting an upward force on the free ends of the support arms and includes surfaces configured to pressingly engage specially configured portions of the free arm ends so that operation of the pressure system forces the free ends towards each other to ensure closure of the mold, and to force the free ends up against a limit stop to terminate upward travel to compensate for sag and mounting system wear.

Abstract: A blow molding apparatus having two rows of holding plates each for holding a plurality of preforms; supporting and conveying means for conveying the two rows of holding plates into a blow molding station while slidably supporting the holding plates so that the row pitch in the rows is variable; two rows of blow molds arranged in the blow molding station corresponding to the two rows of holding plates, each row of the blow molds being adapted to blow mold the preforms; and a linkage for changing and setting the row pitch in the rows of holding plates.

Abstract: A machine including a system for moving one member into engagement with another and to apply a high clamping force thereto. The system includes an electrically operated pump and an associated cylinder assembly. The cylinder assembly includes a housing having first and second chambers, each having actuating fluid therein. A piston is located within the housing and is coupled to one member. A ballscrew and associated nut are located within the housing coupled to the piston and arranged to move the piston in either of two opposite directions under power from an externally located electrical servomotor. When the piston is moved in one direction it carries the associated member into engagement with the other member and also causes actuating fluid to flow from the second chamber into the first chamber. The pump is arranged to provide additional actuating fluid to the first chamber for applying a clamping force directly to the piston, and not to the ball screw and nut.

Abstract: A process and apparatus for the production of hollow bodies from thermoplastic material by means of blow molding uses a blow molding mold which includes at least first and second mold portions to enclose a generally tubular extruded preform which is expanded within the mold under the effect of an increased internal pressure within the preform. To provide for asymmetric closing and/or opening movements of the mold portions relative to the preform, the blow molding mold is displaced as an entirety parallel to the direction of the opening and/or closing movements of the mold portions, more especially during the mold closing and/or opening procedure, so that an additional motion is superimposed on the movements of the mold portions.

Abstract: A plastic blow molding machine (40) having a wheel (44) rotatable on a base (42) about a horizontal axis (A) includes a plurality of mold stations (90) mounted on the wheel about the rotational axis and having a pair of mold supports (94) movable toward and away from each other in a parallel relationship to the rotational axis at closing and opening stations (114,116). Operating cams (120,124) of the closing and opening stations cooperate with operating cam followers (110) of the mold stations to provide closing and opening mold movement, and locking cam followers (122,126) of the closing and opening stations cooperate with locking cam followers (112) of the mold stations to lock and unlock a lock mechanism (102) that operates directly between the mold supports (94) of each mold station so that there is no loading of the frame (46) of the wheel during the machine operation.

Abstract: Apparatus includes a blow mold for forming a hollow plastic article forming a parison including at least reciprocable mold portions affixed to platens, wherein the mold portions are relatively movable from an open to a closed position including a spacing bar contacting the platens in the mold closed position operative to space apart the mold portions in the closed position thereof to form a controlled vent therebetween.