Abstract: An injection molding machine is provided with two sets of metal molds each including a stationary and movable metal molds. The two sets are mounted on a supporting plate which is moved in a direction perpendicular to the axis of an injection cylinder. Thus by reciprocating the supporting plate the two sets of the metal molds are alternately moved into and out of the injection molding machine.

Abstract: A quick changing and quick gripping device for the molding tools of injection molding machines. The two mold halves of each molding tool are alignable in insertion guides between two adapter plates located opposite each other. The adapter plates are movable toward each for closing the molding tool and are movable apart from each other for opening the molding tool. The mold halves can be fixed in their aligned position by means of clamping members. During the changing and/or gripping procedure, the two mold halves of the closed molding tool are fixedly locked or coupled to each other. At least one locking bar is movably mounted in a mold half and automatically engages a locking bar engagement member mounted in the other mold half by means of a biasing force, such as, a spring. The locking bar includes an actuating element which projects into the range of an intermediate plate of the respective mold half, the intermediate plate being capable of being operatively connected to the clamping members.

Abstract: A cut-off nozzle system is mounted on the melt conduction duct of the center, sectioned mold clamping plate of an injection molding machine, in such a way that in addition to rapid accessibility of the individual parts of the nozzle system, the center, section mold clamping plate can be easily and quickly separated from the associated screw unit as required for the removal of the molded parts from the molds. The nozzle system has a spacing ring with a torpedo as well as a right-angled adapter and a cut-off nozzle, which parts are exchangeably joined with each other to form one rigid unit. With a high-speed clamping device, this unit is fastened on the movable center, sectioned mold clamping plate. For the upward removal of the molded parts, the screw unit is displaced sideways while the cut-off nozzle system remains mounted on the center mold clamping plate.

Abstract: A die and backing block assembly with a quick release fastening arrangement which includes a plurality of connectors, each including a pin connected to the die and having a head insertable into a tubular body connected to a piston lodged in a cylindrical chamber formed in the backing block. The mouth of the tubular body has radial holes accommodating balls which hold the head of the pin in the tubular mouth of the piston under the action of elastic springs, which tend to move the piston away from the head of the pin. The die and the backing block connected to each other are released from each other when oil is injected under pressure into a volume between the bottom of the chamber and the piston. The piston moves towards the head carrying the balls into a seat so that the balls move and release the head of the pin thus allowing for a separation of the die from the backing block.

Abstract: A stamper holding apparatus comprises a holding member for holding a stamper on the mirror surface of one of stationary and movable mirror blocks, a plurality of stationary side actuation units arranged around the outer periphery of the stationary mirror block, a plurality of movable side actuation units arranged around the outer periphery of the movable mirror block, and operating rods of each stationary side actuation units and operating rods of each movable side actuation units being alternatively engageable with the holding member.

Abstract: A mold clamping device includes a frame, a fixed base for supporting a first mold, the fixed base being fixedly mounted on the frame, a movable base for supporting a second mold, the movable base being movably mounted on the frame in confronting relation to the fixed base, first means on the frame for driving the movable base to move rectilinearly toward and away from the fixed base, a cam follower supported on the movable base, a cam supported on the frame and having a cam surface held in contact with the cam follower, and second means for driving the cam in a mold clamping stroke to displace the cam follower for enabling the movable base to clamp the second mold firmly against the first mold on the fixed base, the cam surface being defined by a cam follower displacement curve having a gradient which is greater at an initial stage of the mold clamping stroke and becomes smaller as the mold clamping stroke progresses.

Abstract: A mold comprises a pair of openable and closeable mold halves separable along a parting line. By this invention, each mold half defines a recessed outer surface portion which communicates with the recessed portion of the other mold half in the closed position. Each mold half defines a bridge portion which extends over its recessed portion and is positioned adjacent to the parting line. Thus, a lifting hook may pass into the recess defined by the outer surface portion to engage the bridge portion of a separate mold half, or to engage both bridge portions of both mold halves in the closed position.

Abstract: An injection molding system for processing thermoplastics and thermosetting plastics has at least one injection unit (1), which is axially movably supported on a support frame and is coupled to positioning means (15) generating the axial movement, and also has at least one turntable (2) supporting a plurality of injection molds (8) disposed in a ring. The turntable is supported on a movable cart (23) such that it is rotatable about a vertical axis (9). The injection unit is provided with axially movably supported rails (19), which have devices for releasable coupling to a mold carrier (28), carrying the particular mold (8), of the turntable (2) and are connected to clamping means (20, 21).

Abstract: A straight-hydraulic mold clamping system for use in a molding machine has a bearing portion for a rod of a mold clamp cylinder provided with a plurality of annular oil grooves within which an oil functions, and utilizes the rigidity of the rod so as to horizontally support a movable platen and a molding die attached to the movable platen in a cantilever manner and maintain the horizontality of the movable platen and the molding die.

Abstract: A die locking mechanism for a molding apparatus including stationary and movable die assemblies, has a stop bar movable back and forth with respect to the stationary frame structure in a direction parallel with the direction of movement of the movable die assembly, and a locking member rockable between first and second angular positions about a fixed pivot axis. The locking member has a cam lobe portion generally arcuately curved about the pivot axis and is engageable with the stop bar, the cam lobe portion being disengaged from the stop bar with the locking member in the first angular position and being engageable with the stop bar with the locking member in the second angular position so that the movable die assembly is locked in position with respect to the movable die assembly.

Abstract: A rotary turret injection moulding machine has a turntable (12) carrying a plurality of mould sets (17) and arranged to be rotated continuously, a device for injecting moulding material into the moulds and a clamping mechanism for holding the moulds closed during the injection being reciprocated in synchronsym with the rotation of the turntable. Each mould set has one part (18) firmly mounted on the turntable and another part (19) which pivots for opening and closing the mould. A cam (40) follower coupled to the movable part cooperates with a stationary cam (41) extending around the turntable axis to close and open the mould as the turntable is rotated. The movable mould part includes a mould plate mounted for tilting movement on its support arm, and dowel pins (30) and sockets (31) on the mould plates are arranged to ensure correct alignment when they are closed together.

Abstract: An injection molding machine for molding with a high polymer material such as rubber and resin which is improved in the working efficiency and productivity thereof. The injection molding machine comprises a plurality of independent metallic molds, a metallic mold securing device having two receiving portions for receiving and clamping the metallic molds therein, a metallic mold loading and unloading device for loading and unloading the metallic molds to and from the receiving portions, and a drive device for moving the metallic mold securing device. Accordingly, injection and vulcanization can be carried out alternately for two metallic molds so that, also during vulcanization for the first metallic mold, injection to the cavity of the second metallic mold can be carried out. The metallic mold securing device can otherwise have more than two such receiving portions when necessary.

Abstract: A mold comprising mold halves separable along a parting line has a rotating lifting handle carried by one of the mold halves, where the handle rotates between a first position in which it lies generally flat against the mold and a second position in which it extends outwardly from the mold to permit engagement by a lifting hook or the like. By this invention, rotation of the lifting handle from the first to the second position is prevented when the mold halves are separated along the parting line by more than a predetermined distance. Thus the mold cannot be lifted, since the handle cannot be rotated into outwardly extending position to receive the hook until the mold is closed. Additionally, this invention may be used to prevent opening of the parting line between the mold halves when in closed relation, while the handle is in the second position.

Abstract: A mold comprises at least two separable parts defining at least one parting line. In this invention, a passageway is defined in one of the separable parts, while a pin, positioned in the passageway, is secured to another of the separable parts. The passageway and pin extend essentially in the direction that the separable parts move to open and close their parting line. A slot is defined in the separable part that defines the passageway, the slot communicating between the passageway and the exterior of the mold. When the mold is closed, a portion of the pin occupies the slot. Accordingly, lifting means can enter the slot to engage the pin when the mold is closed, for lifting thereof, and longitudinal movement of the pin in the slot can be prevented, to lock the mold, while the pin is so engaged.

Abstract: An apparatus for jointing CV cables includes a lock mechanism which closes a split portion of a mold, used for extrusion-molding and opens the split portion by heat when crosslinking is performed.

Abstract: An injection mold is described for producing the housings of integrated circuits. The injection mold icludes a first mold half (30) in which are disposed a number of mold recesses (46) corresponding to the number of housings to be made simultaneously, having a depth corresponding to a portion of the height of the housings, and supply passages (48, 50, 52, 54, 56, 58) leading to the mold recesses (46). In a second mold half (32) which is adapted to be brought in the closure direction into engagement with the first mold half (30) a number of mold recesses (76) equal to the number in the first mold half (30) are disposed in corresponding arrangement, the depth thereof being equal to the remaining portion of the height of the housings to be made. The mold recesses (46) in one of the mold halves (32) are disposed groupwise in mold portions (64) which are held in the one mold half (32) displaceably in the closure and opening direction.

Abstract: A traction type press for shaping a material in a mold type assembly comprising a clamping means associated with a fixed or mobile plate bearing directly on the plate and on the bearing element of the clamping structure situated behind the plate.

Abstract: A locking device for locking two mold halves in the closed position for a blow molding process by use of a shaft with at least one lug on one coupling member and a mating key hole in a second coupling member such that the lug passes through the keyhole and is rotated within said second coupling to lock by engaging the lug with a flange of the keyhole. The rotation of the lug being effected by a guide rod and co-operating guide slots such that as the shaft of the coupling member moves in the locking direction the guide rod is guided by the slots to rotate the lug into the locking position.

Abstract: Closure units for molding tools, in particular those for the production of polyurethane moldings comprising long lifting cylinders arranged between an upper cross head and a movable cross head for lowering and raising the upper half of a molding tool, the movable cross head being mounted on columns connecting the fixed cross head to a base by means of short lifting cylinders having arrestable drag pistons arranged therein, were found to offer advantages in terms of economy of design and operation.

Abstract: The mold clamping force exerted in a toggle plastic injection molding machine is measured by determining the amount the tie rods stretch. A link is clamped on a lower tie rod near the backing platen and supports a contact that is adjustable in the direction of tie rod stretch. The contact in turn engages a probe portion of a sensor that is secured to the machine base. The contact, hence the sensor probe, move the amount that the tie rod stretches at the point of clamping. The motion is directly proportional to clamping force which latter can then be adjusted by operating the adjusting nut drive motor a suitable amount.

Abstract: A device for automatically latching together the two die halves of an injection molding die of a plastics injection molding machine, when the die is removed from the machine, the device comprising a guide sleeve in one die half having a guide portion cooperating with the guide bore of a guide bushing in the other die half, a latching plunger in the guide sleeve having a latching head cooperating with an end face of the guide sleeve to radially expand a split latch ring or a cupped latch disk into engagement with a groove of the guide bushing, when the latching plunger is freed to move from its depressed release position to its latching position, under the action of a preloaded plunger spring. The attachment of the die half to a die carrier member automatically disengages the latching device by depressing the latching plunger.

Abstract: The present invention provides a mold-thickness adjusting apparatus in a clamping mechanism for molding synthetic resins in which a clamping plate is inserted into and mounted on a plurality of tie bars provided over a pair of fixed plates on a machine bed, wherein despite the mold-thickness adjustment is effected by a connecting portion between a clamping ram and a clamping plate, a positional movement of the clamping plate resulting from rotation can be done smoothly, and even if mutual threads are temporarily brought into close contact with each other due to the concentration of the clamping force on the connecting portion, members can be rotated after the close contact has been relieved.

Abstract: Injection pressure acting on a molten material inside a nozzle in an injection process also acts on a mould clamping piston disposed in an injection cylinder to face an injection piston. The injection pressure acting on the mould clamping piston is transmitted to an auxiliary platen mounted at the right ends of tie bars, thus producing tensile force in the tie bars. Because of the tensile force, a movable platen mounted at the left ends of the tie bars is pulled toward a stationary platen, which in turn presses a movable mould against a stationary mould. Consequently, clamping force proportional to the injection pressure acts on the moulds, thus firmly clamping the moulds.

Abstract: A clamping device of this invention is constructed of bases on which molds are slidably moved, regulating portions each provided above the corresponding base and having a clamping surface which is inclined relative to the base, shifting means provided beside the bases and for shifting each mold placed on the base in a direction to which the space between the base and the clamping surface progressively narrows and a spacer fixedly mounted on the upper surface of the mold, the upper surface of which being in the form of an arc in a direction to which the mold is moved. In use, each of the molds placed on the base is moved by the shifting means. The mold is then sandwiched between the base and the clamping surface and clamped to a wedge configuration.

Abstract: A clamp mechanism for selectively locking and unlocking a first member in a first position relative to a second member comprises a linkage system connecting the first and second members and drive means for articulating the linkage system for moving the first member relative to the second member. A fluid link is provided for locking the first member in position relative to the second member wherein the fluid link is actuated upon sensing the first member approaching the first position.

Abstract: The mold halves of a blow mold device are mounted on a pair of arms encircling the mold halves in a semicircular arc which arms are latched together by latching means which are located at the parting line of the mold halves at both sides thereof. Due to this structure, merely the portion of the arms extending between said latching means is subjected to bending forces by the blowing pressure. For swinging the arms and actuating the latching means a common slide is provided in parallel relationship to the longitudinal axis of the blow mold, which slide includes a number of control cams which are engaged by cam followers cooperating with said arms and said latching means. The invention provides a compact and light-weight construction allowing to actuate a smaller mass in shorter time, thus increasing the production capacity of the blow mold device.

Abstract: A machine for manufacturing foam building blocks (39) and the like wherein a plurality of two-piece forming molds (21) are continuously moved by a conveyor mechanism along a closed path-of-travel (22) is disclosed. Filling, curing and injection stations (31, 32 and 33) are located along the path-of-travel (22). As a mold (21) enters the filling station (31), the nozzle (37) of a foam gun (35) enters a hole (34) in the top of the mold (21) and moves with the mold (21) as that mold continues to move along the path-of-travel (22). At the end of the filling station (31), after the foam gun (35) has injected a suitable amount of resin, curing and foaming agent materials into the mold (21), the nozzle (37) rises from the hole (34). Thereafter, a cap-latch (36) is moved into a hole closed position. In addition to closing the hole (34), the cap-latch (36) forms one of two latches that latch the two mold pieces (21a and 21b) together. The other latch (38) is located on the opposite side of the forming molds (21).

Abstract: A mold structure having at least first, second and third mold parts stacked one on top of the other, each having structure thereon defining at least one part of a mold cavity. The second part is oriented between the first and third parts and has mold cavities on both sides thereof. A support structure is provided for supporting the first mold part for movement toward and away from the third mold part. Structure is included within the mold structure to limit the spacing between the first and second mold parts to a prescribed spacing so that as the first mold part is moved away from the third mold part, the second mold part will be spaced a prescribed distance away from both the first and third mold parts.The invention also includes a mold opening structure which is coaxially aligned with the elongate tie rod extending between the mold parts. This structure further effects a safe and positive opening of the mold structure.

Abstract: A clamp assembly for selectively clamping a movable cross-head assembly to each column of a press having a plurality of columns. The clamp assembly includes an inner clamp sleeve positioned concentrically about each column. The inner clamp sleeve is slidably longitudinal with respect to the column and has an inner generally cylindrical surface for engaging the column. An outer clamp sleeve is secured to the cross-head assembly concentrically about the inner clamp sleeve. The inner and outer clamp sleeves are threadeably secured together to limit longitudinal movement of one clamp sleeve with respect to the other. Although threaded together, there is sufficient clearance between the opposing threads of the inner and outer clamp sleeves to define a helical chamber therebetween. A hydraulic fluid system is provided for selectively introducing pressurized hydraulic fluid into the helical chamber.

Abstract: A system for manufacturing three-dimensional work pieces, such as interior automobile components, includes several cooperating stations arranged in such a way that a hingeable mold member connected to a hinging frame may cooperate with another mold member or with other tools such as trimming tools, curing tools, cleaning and waxing tools and the like. The hinging frame is engageable by hinging bolts of the same construction located in different work stations. The hingeable mold member is transportable, for example on an endless conveyor, when it is disengaged from the hinging bolts. The number of work pieces produced per unit of time is increased by the cooperation of a forming or shaping station with a trimming station, with a foaming station and several curing stations for the foamed material in a shaped work piece.

Abstract: A mold clamping device for an injection molding machine wherein a movable table which supports a movable mold is moved in directions approaching and moving away from a fixed table which supports a fixed mold to thereby bring the molds into open and closed states, and wherein mold clamping is effected in a closed state of the molds by mold clamping cylinders. The mold clamping device includes tie rods for guiding the movement of the movable table, the tie rods projecting upward from the fixed table and being each provided with an engaging groove such as threads or the like formed on the outer peripheral surface of its portion projecting from the movable table to the side opposite to the fixed table in the closed state of the molds; and split mold-like locking members capable of engaging with and disengaging from the tie rods each through each engaging groove in the closed state of the molds, the locking members being slidable in the axial direction of the tie rods.

Abstract: Molding apparatus for encasing a wood pallet in plastic including a press with plural platens and plural carrier plates between the platens. The carrier plates carry plural mold frames between each pair of carrier plates. Each frame has an injection part. Movable means are included for connecting the mold injection parts with the resin supply. The frames are disposed at an angle to the horizontal for easy venting.

Abstract: A split-mold safety lock for preventing unintended separation of mold components during lifting and manipulation thereof. The invention employs a split ring capable of being swiveled in a circle of 360.degree. and being pivoted in an arc of 180.degree. around a perpendicular axis there in a base. A safety lock is associated with the ring base for permitting separation of the molds for a molding operation and to automatically assume a locked configuration upon lifting. The split-mold lock is capable of being utilized on multiple parting lines of a plurality of mold parts.

Abstract: A molding machine for die casting, injection molding, and other similar processes, comprises a base shaped to support thereon a two-part die, and a ram for converging and diverging the die halves between open and closed positions. A pair of clamping frames are pivotally mounted on one end of the base, and include a closed border shaped to surround or receive therein side portions of the die halves. The clamping frames are laterally pivoted between a fanned-apart or open position wherein the die can be freely lifted off of the base, and a folded or closed position wherein the frame borders surround the die side portions and capture the same between the ends of the frames. In the closed position, retractable compression columns extend between the die and one end of the frames to positively lock the die halves in the closed position, whereby die separation forces developed during injection of the die are resisted substantially solely by the clamping frames.

Abstract: A tripartite mold has a control bar on a fist outer plate and a locking bar parallel thereto on a second outer plate, both of them traversing respective passages in a guide block on an intermediate plate when the mold is closed. A U-shaped detent, slidable transversely to the two bars in a channel of the guide block, straddles the locking bar with clearance and is urged by spring pressure against the control bar which, in the closed position, it contacts with one leg while its other leg engages in a notch on the locking bar so as to latch the intermediate plate to the second outer plate. When the outer plates are driven apart with initial entrainment of the intermediate plate by the second outer plate, a cam on the control bar represses the detent against its spring force and disengages the other leg thereof from the locking bar whereby further separation of the outer plates lets the intermediate plate stay put while the second outer plate moves away.

Abstract: Multiple mold clamping apparatus comprising a plurality of mold clamping stations, each having a fixed die plate with a fixed die, a rest plate which is separated from the fixed die plate by a certain distance a movable die plate with a die opposingly facing the fixed die, and a moving device for moving the movable die plate, a hydraulic cylinder unit is slidably mounted beneath the rest plate and includes a piston rod defining an end surface portion for contacting the movable die plate, a power transmitting device mounted on the movable die plate for transmitting clamping force from the piston rod to the movable die, and a conveying device for conveying the hydraulic cylinder unit from one mold clamping station to another.

Abstract: A mechanism for locking two mold parts together includes a cylindrical tie rod securely mounted on one mold part and having a circumferential groove therein. A cylindrical collet sleeve is rigidly mounted on the other mold part and has a plurality of axially extending, circumferentially spaced, resiliently flexible arms at one end. The free end of each arm has an inwardly projecting locking member thereon which the arm resiliently urges radially inwardly. When the mold parts are moved to a closed position, the tie rod is received within the collet sleeve and the locking members become axially aligned with and are urged into engagement with the tie rod groove. An annular collar encircling the tie rod is then moved axially until its inner surface snugly engages the outer surface of the collet arms, thereby preventing radially outward movement of the collet arms.

Abstract: There is disclosed an improved molding machine and a system for utilizing said machine, wherein central sources of supply are used to provide the operating requirements for the machine, such as high pressure hydraulic fluid, compressed air, cooling water and electic power. The machine disclosed utilizes a stationary platen and a movable platen, with a novel mold clamping arrangement as an integral part of the movable platen assembly. In this regard, said movable platen includes a pair of relatively movable plate members, with a high pressure diaphragm interposed therebetween. On the rearward most plate member there is mounted latching means for fixing the position of said rearward plate member preparatory to pressurizing of the diaphragm. When pressurized, the diaphragm will force the forward most plate member toward the stationary platen to effect the desired preloading of the mold inserts carried by said platens.

Abstract: Disclosed herein is a mold assembly including first and second mold members assembled together to define a mold cavity, which first and second mold members each include a peripheral surface extending outwardly from the cavity, a gasket captured between the peripheral surfaces, and one or more tubes extending through the gasket and between the peripheral surfaces to provide communication between the cavity and the atmosphere.

Abstract: A molding machine for die casting, injection molding, and other similar processes, comprises a base shaped to support thereon a two-part die, and a ram for converging and diverging the die halves between open and closed positions. A pair of clamping frames are pivotally mounted on one end of the base, and include a closed border shaped to surround or receive therein side portions of the die halves. The clamping frames are laterally pivoted between a fanned-apart or open position wherein the die can be freely lifted off of the base, and a folded or closed position wherein the frame borders surround the die side portions and capture the same between the ends of the frames. In the closed position, retractable compression columns extend between the die and one end of the frames to positively lock the die halves in the closed position, whereby die separation forces developed during injection of the die are resisted substantially solely by the clamping frames.

Abstract: A four-sided turret interposed between a fixed and a movable platen of an injection-molding machine, mounted on a carriage which is slidable in the direction of platen motion, is rotatable about an axis perpendicular to that direction into four operative positions spaced 90.degree. apart. In each of these positions, in which one or more cores carried on one of its faces enter respective cavities of a confronting mold plate on the fixed platen while a corresponding core or cores on an opposite face are received in a companion plate on the movable platen, the turret is positively indexed by two aligned pins on these plates which enter respective bores in the turret upon closure of the mold; such closure, conversely, is prevented by the pins until the turret is in the proper position.

Abstract: A hydraulic press having upper and lower hydraulically operated plates whereby the upper plate is movable with a long stroke cylinder and the lower plate is movable wth a short stroke cylinder. The press has a grooved load bearing rod which is attached to the upper moving plate and passes through the upper fixed plate of the press with a series of slots machined in the rod. A split ring and an especially ground shim are located on a bushing in the upper plate and in one of the ground grooves. A locking plate is attached to the lower part of the upper fixed plate and using a hydraulically operated cylinder has locking plates which move into and out of engagement with the grooved rod to accurately locate the position of the upper moving plate when the machine is stroked. This method of adjusting the horizontal position or parallelism of the plates enable very accurate positioning of the mold or dies which are mounted between the plates of the press.

Abstract: A mechanism for locking together two mold sections includes one or more lock elements rotatably mounted on one of the mold sections, and a respective cylindrical tie rod for each lock element mounted on the other mold section. Each lock element has a cylindrical opening therethrough along its axis of rotation, and a plurality of lock balls disposed in recesses in the surface of the opening so as to form radially inwardly extending hemispherical projections on said surface. Each tie rod is of a diameter slightly less than that of the corresponding cylindrical opening in the lock element, such that the tie rod is axially slidably receivable within the opening. The surface of each tie rod has a plurality of longitudinal guide grooves radially aligned with the lock balls in the surface of the opening, and each lock ball is slidingly received in a guide groove when the tire rod is slidably disposed in the opening. Intersecting each guide groove at substantially a right angle is a lock groove.

Abstract: A hydraulic press includes long stroke piston cylinder assemblies to drive a movable platen along four pull down power rods between an upper open position and a lower reference position immediately adjacent to and parallel with the stationary platen, a wedge ring clamp mechanism selectively to lock the movable platen to the four pull down power rods at either the upper or lower reference positions, and short stroke piston cylinder assemblies operative reciprocally axially to drive the four pull down power rods when the upper platen is locked thereon to move said locked upper platen between said reference position and a closed position in which the two platens are loaded under high forming pressure.

Abstract: In a molding press having fixed and movable platens for mounting mold halves, the movable platen is connected through thrust rods and a thrust plate to the movable component of an hydraulic piston-cylinder platen drive unit the fixed component of which is attached to a fixed base. A high pressure piston-cylinder mold clamping unit of the pancake type interengages the movable platen and a pancake cylinder support plate mounted for movement along the thrust rods and arranged for abutment by the thrust plate. The pancake cylinder support plate and fixed base are joined together by toggle joints operated by a piston-cylinder locking unit supported pivotally on arms extending pivotally from the pancake cylinder support plate and fixed base. The drive unit thus is arranged in parallel with the series arrangement of the toggle joints and mold clamping unit.

Abstract: An injection molding machine has a round support member rotatably mounted on a shaft, there being at least a series of molds supported on and along the periphery of the table. Each of the molds includes a pair of relatively pivotable mold members, one of which is operatively connected to a power actuator which includes a fluid-pressurizable cylinder fixed to the support member and a piston having a rod projecting from the cylinder for actuating said one of the pair of mold members.

Abstract: The invention relates to the production of spectacle frame parts of synthetic material and in particular to the moulding of spectacle frame faces of synthetic material, for example, of polyurethane.The faces are moulded between two casting half-moulds each comprising a plate having an impression on one surface thereof. Each plate has a substantially equal thickness at every point and is made of a polyolefine. Use of such half-moulds enables the faces of spectacle frames to be directly moulded into their final shape.

Abstract: A molding machine in which first and second mold bodies which defines a chamber in a closed position thereof are carried by respective first and second supports and are moved along a predetermined path of travel with a locking post having a locking element being carried by a first of the supports and a second locking element being carried by the second support and being moved generally transversely to an axis of the locking post, the locking post having a threaded end portion and a nut rotatable thereon for axially adjusting the position of the locking post, and a stationary guide bar being embraced by a generally U-shaped guide element carried by the first locking element to prevent rotation of the locking post and the first locking element during the rotation of the threaded nut.

Abstract: A thrust member on column secured to a movable platen of an injection-molding machine, surrounded by a mounting frame with laterally withdrawable shutters which enter behind the thrust member in the terminal phase of a mold-closing stroke for transmitting to the thrust member a supplemental clamping force, is linked with a hydraulically actuated plunger or driving piston via a lost-motion coupling. The clamping force is supplied through one or more annular pistons received in respective cylinder chambers of a stationary housing linked via tie rods with a fixed platen. Upon the release of the clamping force, a counter-vailing hydraulic force is developed between the column and the driving piston, whose forward displacement is limited by a fixed abutment, to break open the mold with a larger hydraulic force.

Abstract: An arrangement in connection with the die closing unit of an injection molding machine for interchangeably mounting to the rear side of the stationary die carrier plate differently spaced pairs of tie rods of injection units of different size, using two tie rod mounting sockets whch are clampable to the die carrier plate and thereby also serve to produce an axial preload on the tie rod connections of the die closing unit in the die carrier plate.