Abstract: A method for manufacturing a hollow glass is provided. The method includes the steps of placing at least one drop of glass in a cavity of a mold, inserting a punch into the cavity of the mold, forming the hollow glass item by using the punch and simultaneously imprinting at least one raised or hollow pattern at a chosen location on an inner surface of at least one wall of the hollow glass item, thereby superimposing the at least one raised or hollow pattern on the shape of the hollow glass item, removing the punch from the cavity of the mold and stripping the hollow glass item, which includes the at least one inner raised and/or hollow pattern. The punch has a body with an end portion, the end portion has an outer side surface. The body includes a raised or hollow pattern on the outer side surface of the end portion. The raised or hollow pattern is independent of the shape of the hollow glass item. A device for manufacturing a hollow glass item is also provided.

Abstract: Provided is an optical connector that can optically couple a multi-core fiber and single-mode fibers with a high efficiency. The optical connector connects: N (N is an integer of 3 to 14) single-mode fibers each including one core with a high refractive index, in a cladding material with a low refractive index; to a multi-core fiber including N cores with high refractive indexes in a cladding material with a low refractive index such that the cores of the single-mode fibers are respectively optically coupled to the cores of the multi-core fiber.

Abstract: An interposer sheet can be used for making semiconductor bodies, such as of silicon, such as for solar cell use. It is free-standing, very thin, flexible, porous and able to withstand the chemical and thermal environment of molten semiconductor without degradation. It is typically of a ceramic material, such as silica, silicon nitride, silicon oxynitride, silicon oxycarbide, silicon carbide, silicon carbonitride, silicon oxycarbonitride and others. It is provided between a forming surface of a mold sheet, and the molten material from which a semiconductor body will be formed. It may be secured to the forming surface or deposited upon the melt. The interposer sheet suppresses grain nucleation, and limits heat flow from the melt. It promotes separation of the semiconductor body from the forming surface. It can be fabricated before its use. Because free-standing and not adhered to the forming surface, problems of mismatch of CTE are minimized.

Abstract: The invention relates to a finishing mold comprising a cavity for receiving a paraison the glass item and delimited by a central body arranged between a lid and a bottom. The central body is formed by an even number of complementary sectors at least equal to four, radially and simultaneously movable between an active position for molding the item from said paraison in which the sectors are laterally applied against one another, and a passive position for stripping the item in which said sectors are laterally spaced apart from one another.

Abstract: A mold of a glassware molding machine has two half-molds movable between a closed molding position and an open extraction position by a mold opening/closing assembly, wherein two actuating arms, each fitted to a respective half-mold, are rotated about respective fixed hinge axes by an actuator assembly having a central linear actuator, and two lateral linear actuators located substantially on opposite sides of the central actuator; the actuators having respective movable members translating respectively along a central axis and two lateral axes parallel to one another and to the fixed hinge axes; and the central axis being located at a distance from a plane of the lateral axes.

Abstract: A mold of a glassware forming machine has a longitudinal plane of symmetry, and two half-molds movable between a closed position and an open extraction position by a powered mold opening/closing device, which has a fixed fastening and supporting structure, two mold-holders, and, for each mold-holder, a respective supporting and actuating arm hinged to the relative mold-holder to rotate about a movable hinge axis, and to the fixed structure to rotate about a fixed hinge axis; the fixed hinge axes being located on opposite sides of the plane of symmetry, and at such a distance from the plane of symmetry that, when the half-molds are in the closed position, the line intersecting the fixed axis and movable axis of each arm extends substantially parallel to the plane of symmetry.

Abstract: Apparatus for opening and closing mold arms in a glassware forming machine includes a gearbox for mounting on a glassware machine frame, a cylinder housing suspended beneath the gearbox, and a mold open/close cylinder disposed within the cylinder housing. The cylinder has a mold open/close piston with an extending piston rod and a gear rack machined or otherwise formed in the piston rod. A first drive gear in the cylinder housing is coupled to the gear rack and a drive shaft extends from the first drive gear and the cylinder housing into the gearbox. A second drive gear is disposed in the gearbox and coupled to the drive shaft. Laterally spaced operating shafts extend upwardly from within the gearbox. Means including an idler gear couple the second drive gear to the operating shafts such that the operating shafts are rotated simultaneously in opposite directions by the cylinder, the gear rack, the first and second drive gears and the idler gear.

Abstract: An I. S. Machine is provided wherein the blow molds are closed to a slightly cracked location whereby applied cooling air can not leak into and pressurize the blow mold thereby damaging the parison during reheat. When reheat is completed, the blow molds are fully closed and the parison is transformed into a bottle by applying compressed air and/or vacuum.

Abstract: Apparatus for opening and closing mold arms in a glassware forming machine includes a gearbox for mounting on a glassware machine frame, a cylinder housing suspended beneath the gearbox, and a cylinder disposed within the cylinder housing. The cylinder has a piston with an extending piston rod and a gear rack machined or otherwise formed in the piston rod. A first drive gear in the cylinder housing is coupled to the gear rack and a drive shaft extends from the first drive gear and the cylinder housing into the gearbox. A second drive gear is disposed in the gearbox and coupled to the drive shaft. Laterally spaced operating shafts extend upwardly from within the gearbox. Means including an idler gear couple the second drive gear to the operating shafts such that the operating shafts are rotated simultaneously in opposite directions by the cylinder, the gear rack, the first and second drive gears and the idler gear.

Abstract: A mold open and close mechanism uses the hook of a blank mold half and the associated ridges of the upper mold support hanger to maintain the blank mold half on the mold but defines a vertical locating structure for placing the bottom surface of the blank mold half on the top horizontal surface of the lower mold support hanger with a vertical space between the hook of the blank mold half and the upper mold support hanger.

Abstract: A mold open and closed mechanism for an I.S. machine is disclosed which has a mold carrier supported for displacement between mold open and closed positions. The mold carrier has a front mold mounting face vertical and horizontal mold alignment structure and a vertical face for transmitting clamping forces to a supported mold.

Abstract: A glass molding machine includes a shaping die, a temperature controller, a die assembling state, a glass molding stage and a die disassembling stage. The shaping die includes a first, second and body molds. The die assembling stage feeds a glass material to the first mold with the body mold being fitted to the exterior of the first mold. The die assembling stage fits the second mold to the body mold to assemble the shaping die. The glass molding stage heats and molds the glass material. The die disassembling stage removes the second mold from the body mold after the molding, to remove the molded glass product. The temperature controller provides a temperature difference so that a temperature of the body mold is higher than a temperature of the second mold in the die assembling stage and in the die disassembling stage.

Abstract: An I. S. Machine is provided wherein the blow molds are closed to a slightly cracked location whereby applied cooling air can not leak into and pressurize the blow mold thereby damaging the parison during reheat. When reheat is completed, the blow molds are fully closed and the parison is transformed into a bottle by applying compressed air and/or vacuum.

Abstract: A press molding apparatus includes upper and lower molding dies each having a molding surface facing each other, and a driving device which moves at least one of the upper and lower molding dies in a vertical direction so that the upper and lower molding dies are opened and closed. The driving device includes a main shaft which supports the at least one of the upper and lower molding dies, an ascending and descending member which, while supporting the main shaft, ascends and descends, a plurality of screw shafts which is located eccentrically from an axis line of the main shaft, and engages a plurality of screws formed in the ascending and descending member in order to move up and down the ascending and descending member, a driver which synchronously rotates each of the screw shafts, and a controller which controls the driver.

Abstract: As means of the present invention, first, on the optical element, a plate-like peripheral edge part which is protruding, while surrounding an effective part having an optical function thereof, outside from the effective part is provided. Furthermore, at a part of the through hole of the holder, a straight cylindrical part is provided. Then, an outer circumference of the peripheral edge part is tightly fitted to an inner circumferential surface of the cylindrical part of the through hole throughout the entire circumference.

Abstract: A system and method for forming infrared glass optical components are provided. The system includes first and second mold halves having first and second respective faces. The first and second mold halves are configured to be removably coupled such that the first face and the second face form an interface that defines a lens-shaped cavity. A tapered surface of the first face cooperates with a tapered surface of the second face to enhance centering of the first face with respect to the second face.

Abstract: Each mold half is held by means of a mold half holding mechanism which can be driven so as to pivot in a reciprocating manner about a common vertical hinge column by means of a vertical shaft (6; 7), which is mounted in a rotatable manner in a frame (2) of the glass forming machine (1), and by means of first intermediate members. Each shaft (6; 7) is connected via a lever mechanism (8; 9) to a common drive shaft which can be pivoted in a reciprocating manner by means of a drive element (19), which can be moved linearly in a reciprocating manner, of a drive (20) and by means of second intermediate members (18). The drive element (19) can be mounted on a nut (26) and secured against rotating about a longitudinal axis (39) of the drive element (19) by means of a guide device (32). The nut (26) is in engagement with a spindle (33). The spindle (33) is mounted in an axially fixed, rotatable manner and can be driven rotationally in a reciprocating manner by means of the drive (20).

Abstract: A heat source is formed within one piece of a multi-piece mold designed to shape a glass tube. The one piece of the mold can then be used as a source of intense heat to render the glass malleable and to also contribute to shaping the tube in conformance with the mold. In one embodiment, the heat source includes channels formed throughout the one piece of mold for distributing a gas therethrough with jets of gas emanating from the inner surface of the mold piece for heating the tube to be shaped to a desired temperature. In apparatus embodying the invention, there is no need for a separate torch and for moving the torch during the shaping process. Also, in accordance with the invention, better control of the heat supplied to the tube being shaped is obtained.

Abstract: Each mold half is held by means of a mold half holding mechanism which can be driven so as to pivot in a reciprocating manner about a common vertical hinge column by means of a vertical shaft (6; 7), which is mounted in a rotatable manner in a frame (2) of the glass forming machine (1), and by means of first intermediate members. Each shaft (6; 7) is connected via a lever mechanism (8; 9) to a common drive shaft which can be pivoted in a reciprocating manner by means of a drive element (19), which can be moved linearly in a reciprocating manner, of a drive (20) and by means of second intermediate members (18). The drive element (19) can be mounted on a nut (26) and secured against rotating about a longitudinal axis (39) of the drive element (19) by means of a guide device (32). The nut (26) is in engagement with a spindle (33). The spindle (33) is mounted in an axially fixed, rotatable manner and can be driven rotationally in a reciprocating manner by means of the drive (20).

Abstract: A drive has a link which connects via a bearing to a shaft which supports an insert carrier. To lubricate the bearing oil is dropped onto an elongated reservoir in the top surface of a slide rail secured to the insert carrier and the oil flows by gravity through the rail and insert carrier to the shaft and then through the shaft to the surface of the shaft where it is supported by a bearing.

Abstract: A mold open and close mechanism for an I.S. machine is provided which separates the drive including the motor and the housing. The drive portion is releasably connected to the housing so that the drive can be easily removed for repair or replacement.

Abstract: A mold for shaping the end region and the opening at a selected end of a first, hollow, generally cylindrical, glass tube to enable a second tube, of smaller diameter than the first tube, to be inserted snuggly a first distance within the selected end of the first tube resulting in the two tubes nesting and being self-centered. The mold includes two complementary elongated side pieces having inner side surfaces for, when joined, encircling the periphery of the first tube along a given portion of its selected end region, and an end cap with a cylindrical stub for insertion within the opening of the first tube at its selected end.

Abstract: A system and method of cooling glassware molds by directing liquid coolant to the blank or blow mold halves of a glassware forming machine through an enclosed pivotal rotary union-type structure. A coolant manifold is carried by each pivotal mold arm, and communicates with coolant inlet and outlet ports at the lower end of each mold part. The manifold is connected by a floating shaft seal and a rotary union assembly and a crank arm to a coolant source and coolant return in the section box of the associated machine section. Each pivotal connection—i.e., between the section box and the crank arm, between the crank arm and the rotary union assembly, and between the rotary union assembly and the floating shaft seal—comprises a bi-directional rotary union for feeding liquid coolant to the manifold and mold parts, and returning coolant from the manifold and mold parts.

Abstract: To provide a press mold for molding glass that is relatively less expansible than a mold material. The mold is configured so that the content volume of the mold is approximately equal to the volume of molded glass at the time of press molding, and a side face member of the mold is divided into a plurality of pieces so as to be capable of moving toward an outside but incapable of moving toward an inside. Thereby, over-tightening of mold side face can be prevented effectively, and a satisfactory molding operation can be performed by transmitting a molding pressure uniformly to a molded member without opening any mold side face.

Abstract: A common cage assembly for a mold for a glassware machine having a mold support member. The assembly further includes a first cage member and a second cage member. Each of the cage members is movably mounted adjacent to the mold support member. Each of the cage members has a mold receiving surface.

Abstract: A mold having a pivoting slide. The mold is made of two shells. An element is rotationally mounted on one of the shells with a part of the element coinciding with the internal cavity of the mold. The element is closed by the second shell which has bearing surface which acts on the element. The mold may be used for glassware products.

Abstract: A mold opening and closing mechanism for a section of an I.S. machine includes a mold carrier assembly and horizontal axially extending shafts. A housing supports these shafts for axial displacement and includes first and second vertically extending ducts which terminate at their tops with a sleeve. A manifold assembly includes a manifold including a plenum which overlies each of the mold halves. A spacer secured beneath said frame and having vertically extending holes communicates with the downwardly opening exit of the plenum for delivering cooling air from the plenum to the vertical cooling air passages of the mold halves. The manifold includes a pair of horizontally extending cylindrical inlet holes A pair of cylindrical tubes are received by the cylindrical holes and first and second elbows connect a second end of each of the cylindrical tubes to the sleeves so that cooling air from the ducts will be delivered to the pair of tubes.

Abstract: A mold assembly (34) for cyclically forming heated glass sheets includes a lower mold (36) having an upwardly oriented mold face (356) and an upper mold face having a downwardly oriented mold face (56) that opposes the upwardly oriented mold face of the lower mold to form a heated glass sheet during movement of the molds toward each other. Alignment guides (122,124) align the molds (36,38) with each other as necessary during movement of the molds toward each other. Detachable connectors (362) detachably connect the molds to each other for installation and are disconnectable to permit the molds to be used for glass sheet forming. In one embodiment, the detachable connectors (362) are latches that include a latch member (364) and a keeper (366), and in another embodiment the detachable connectors are retainers (370) engageable and disengageable from the molds to provide their detachable securement.

Abstract: A mold opening and closing mechanism for a section of an I.S. machine includes a mold carrier assembly and horizontal axially extending shafts. A housing supports these shafts for axial displacement and includes first and second vertically extending ducts which terminate at their tops with a sleeve. A manifold assembly includes a manifold including a plenum which overlies each of the mold halves. A spacer secured beneath said frame and having vertically extending holes communicates with the downwardly opening exit of the plenum for delivering cooling air from the plenum to the vertical cooling air passages of the mold halves. The manifold includes a pair of horizontally extending cylindrical inlet holes A pair of cylindrical tubes are received by the cylindrical holes and first and second elbows connect a second end of each of the cylindrical tubes to the sleeves so that cooling air from the ducts will be delivered to the pair of tubes.

Abstract: A mold assembly (34) for cyclically forming heated glass sheets includes a lower mold (36) having an upwardly oriented mold face (356) and an upper mold face having a downwardly oriented mold face (56) that opposes the upwardly oriented mold face of the lower mold to form a heated glass sheet during movement of the molds toward each other. Alignment guides (122,124) align the molds (36,38) with each other as necessary during movement of the molds toward each other. Detachable connectors (362) detachably connect the molds to each other for installation and are disconnectable to permit the molds to be used for glass sheet forming. In one embodiment, the detachable connectors (362) are latches that include a latch member (364) and a keeper (366), and in another embodiment the detachable connectors are retainers (370) engageable and disengageable from the molds to provide their detachable securement.

Abstract: The present invention is directed to an apparatus for pressing a glass article. The apparatus includes a frame. A mold having first and second mold halves are mounted on the frame. The mold halves define a cavity for receiving a glass gob. The mold halves are movable between open and closed positions. The apparatus includes a device for opening and closing the mold halves. A plunger is movably mounted on the frame adjacent the cavity. The plunger presses the glass gob into the cavity to form the glass article. The apparatus further includes a device for moving the plunger. An alternative embodiment of the invention is directed to a machine for pressing a plurality of glass articles at a high cavity rate. In this embodiment, the machine includes at least two apparatus as described above mounted on a device for moving the apparatus.

Abstract: The mold wall forms the boundary of a cavity provided with a filling opening and is divided vertically into several segments, which are connected to each other in such a way that they can separate under the action of a force acting outward from the cavity. At least one pretensioned elastic element is installed outside the cavity, which is in effective contact with at least one segment, so that, because of the pretension, an elastic force acts on the segment in the direction toward the cavity. A tensioning element is provided to pretension the elastic element, this tensioning element being installed outside the mold wall to serve as an abutment for the elastic element, and that the elastic element be made of a creep-resistant material.

Abstract: A temperature resistant material consisting of fiber-reinforced glass and fiber-reinforced ceramics, respectively, is described as asbestos substitute in devices for handling hot glass, glass ceramics and ceramics objects.

Abstract: Method and apparatus is disclosed for manufacturing a reflex mold wherein a flexible or bendable, thin plate is provided for use in the manufacturing process. A reflex prism assembly is clamped together and metal is applied over the surface of the prisms to make a flat, thin layer of bendable material. A model of curvature is then provided and the thin layer is clamped on the model to assume the desired configuration. More metal is then applied over the back surface of the thin layer until sufficient thickness is obtained to make the reflex mold suitable to receive deposition of lens material for the production of a reflex lens.

Abstract: A mold mechanism for use in a glassware forming machine comprises two mold arms which are mounted on a single transverse rod. The rod is of hardened steel, one of the mold arms is secured to a cast iron sleeve which slides on the rod, the other to a hardened steel sleeve which slides on the cast iron sleeve. A slide member on each mold arm engages a horizontal slideway and is adjustable to determine the position of the mold arms.

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 pivotally mounted mold support has a cylindrical roller extending parallel to the pivot shaft. A pivotal lever arm is connected to the mold support via a link which is connected to the pin supporting the cylindrical roller. The lever arm has a cam surface which engages the roller to close the mold support and establish a line of force extending between the axis of the roller and the axis of the pivot shaft.

Abstract: A mould mechanism for a glass forming machine comprises two mould supports which have first end portions which are mounted on parallel shafts for linear movement between mould open and mould closed positions. The mould supports are moved by mould operating mechanisms which each comprise a hydraulically operated piston and cylinder device providing one of the shafts. A clamping mechanism is provided to latch the mould supports together when in mould closed position.

Abstract: The mechanism comprises a piston and cylinder assembly operable to move mould side portion supports between mould open and mould closed positions thereof. A check valve (72, 74, 76, 78, 80, 82) is mounted in a passage (66) into the cylinder to allow fluid under pressure to enter the cylinder through the passage but to prevent exit of fluid through the passage. The check valve is mounted in a chamber (66f) defined partially by the end cap (60) and partially by a cover member (67) removably mounted on the top of the end cap (60). When the cover member (67) is removed from the end cap (60), the check valve can be removed.

Abstract: A system is disclosed for externally locating the geometric center of an internal lens element which requires that an external reference surface be accurately formed so as to lie concentrically with the central axis of the internal lens element. This is a accomplished in a pressing operation by precisely aligning and securing a ring element to a plunger member. Three points are then selected on the outer reference surface which are not only utilized for positioning the internal lens element for grinding an outer surface to a desired thickness, but also are utilized for aligning and affixing an external lens system in geometric alignment with the internal lens.

Abstract: Cast-iron mold for the production of glass containers by using a "pressed-blown" or "blown-blown" technique wherein the parts exposed to the parison are coated with a uniform alumina layer of which the thickness is less than 5 micrometers. The invention applies to industrial techniques for producing glass containers such as bottles, flasks, jars or the like.

Abstract: An apparatus for ensuring alignment during opening and closing of mold halves in an individual section (I.S.) glassware forming machine has a cylinder containing a pair of mutually reciprocating pistons linked to a pair of mold half actuating shafts. A pair of gear racks, each linked to one of the pistons, mesh with a common idler gear. A plug and cushion combination cushion the opening stroke of the mechanism.

Abstract: The apparatus is arranged to hold side portions of three equally-spaced moulds. The apparatus comprises two holders (2 and 4) for opposite side portions of the moulds. One holder (2) comprises a support (12) on which moving means for moving the holders to open and close the moulds acts, a first carrier (16) for one side portion pivotally mounted on the support (12) and a second carrier (18) for two side portions pivotally mounted on the first carrier (16). The pivotal connections between the support (12) and the first carrier (16) and the first (16) and second (18) carriers are separated by half the mould spacing to balance the mould closing force between the three moulds.

Abstract: The relatively movable mould side portions (22, 26) of a glass moulding apparatus are held together during moulding by clamping means (40,42). The clamping means (40,42) comprises first (40) and second (42) pressing means each movable upwardly into an operative position thereof and downwardly into an out-of-the-way position thereof. In their operative positions, each pressing means (40,42) is operative to press one of the mould portions (22,26) towards a mould portion (22,26) which mates therewith. In their out-of-the-way positions, each pressing means (40,42) is clear of the path of movement taken by the mould portions (22,26) in opening and closing the mould.

Abstract: Mould portions supporting arms of a mould arrangement are moved by drive means between mould-open and mould-closed conditions. The drive means comprises two vertical drive shafts (20) connected to the supporting arms and arranged to move the arms when turned in opposite directions by motor means (40). The motor means (40) is connected to the drive shafts (20) by connecting means comprising a driving pulley (70) driven by the motor and two driven pulleys (72 and 74) mounted on the shafts (20). The pulleys are interconnected by belts (76,78,80 and 82) whose ends are attached to the pulleys. During motion in each direction, two of the belts move the driven pulleys and hence turn the shafts (20) while the other two belts act to maintain tension in the first-mentioned belts.

Abstract: The mechanism comprises two mould support arrangements (14; 114) each comprising a supporting arm (16; 116) pivotal about a first fixed axis (18; 118), a support (22; 122) for mould portions pivotal on the arm about a second vertical axis (24; 124), and a link (36; 136) pivotal about a third fixed vertical axis (28; 128) and on the support about a fourth fixed vertical axis (38; 138). The first axes (18; 118) of the support arrangements are spaced from one another and the first, second, third and fourth axes of each arrangement are arranged at the corners of a parallelogram to retain the relative orientations of mould portions as the arms (16; 116) pivot about the first axes (18; 118).

Abstract: A mould opening and closing mechanism for a plurality of mould portions of a glassware container manufacturing machine. The mechanism comprises fixed rods (26) carrying fixed pistons (30) on each of which a cylinder (32; 54) is slidably mounted. When fluid under pressure is introduced into the cylinder, the cylinder is caused to slide along the rod. The cylinder is connected to a shaft (18,20, 22,24) so that movement of the cylinder causes the shaft to turn about its longitudinal axis. The shaft is connected to a mould portion carrier so that, when the shaft turns, the mould portions are moved to open or close them.

Abstract: The disclosed apparatus is a quadruple gob glass parison forming machine. Its distinguishing features are the mounting of the mold carrying inserts in the mold arms so that equal closing forces will be applied to all the molds, and that the mold arms are formed with extensions so that a conventional mold closing motor can by coupled to the arms and the closing force will be greater by at least 25%. The four molds are opened and closed within the space that has normally been considered cramped, even when three molds were being used.

Abstract: This application relates to parallel blank mold opening mechanism wherein the split blank molds, of which there are a plurality, are carried in holders that are mounted on horizontal hinge pins adjacent the rear thereof. These hinge pins are carried at the upper end of crank arms and move toward and away from each other during the cycle of operation of a pneumatic motor. Each of the mold holders is provided with a parallel link which is connected between the base of the mold mechanism housing and the holder, such that upon opening and closing of the mold the faces of the molds are maintained in a vertical plane. In addition, the position of the axes of the crank shafts and the hinge pins are such that the hinge pins move over top dead center or through the vertical plane defined by the axis of the crank shaft upon opening or closing. In this manner the molds are actually lifted a slight amount during movement from their closed to their open position.

Abstract: A distributing arrangement for a pressurized cooling fluid, especially air, for cooling a forming tool of a machine for forming thermoplastic material, especially molten glass, wherein the forming tool includes at least one split mold including mold segments which are respectively mounted on mold segment holders for movement therewith relative to one another and each of which is provided with a plurality of fluid channels for the flow of the pressurized of fluid channels for the flow of the pressurized cooling fluid therethrough, comprises a fluid distributing box including for each of the mold segments at least two branch channels individually communicating with at least one of the fluid channels when the distributing box is mounted on the mold segment holder.