Abstract: A thermoforming platen is provided having a tooling support plate and a plurality of discrete load paths. The tooling support plate has a top tooling surface, a bottom surface, and an outer periphery. The plurality of discrete load paths interconnect the bottom surface with one or more external load sources operative to distribute and centralize load deformation of the top plate from forming loads. The load paths are provided laterally inboard of the top tooling surface at one of a plurality of inboard locations to impart minimized tooling surface deformation along the top plate tooling surface. A method is also provided.

Abstract: A heat press for extracting fluid, such as oil, from a biological plant. A lower heat platen is fixedly attached to a main frame and an upper heat platen is retractably positioned opposite to the lower heat platen. A pneumatic or hydraulic cylinder or a manual or electronic linear actuator provides pressure to an actuation means that is operatively connected to the upper heat platen for initiating movement. A control mechanism that consists of a single pressure regulator system or a dual pressure regulator system is used to control pressure of a pressing operation of the heat press. Alternatively, a digital regulator system can be used to control pressure, time, and temperature of a pressing operation of the heat press. At least one of the upper and lower heat platens has embedded heating elements and an isolated thermocouple. A user interface panel, having an LCD display, a user keyboard, or a touchscreen display is also mounted to the main enclosure.

Abstract: In one embodiment, a method includes receiving an indication at a modular electronic system of initiation of online removal for a module removably inserted into a slot of the modular electronic system, increasing a fan speed at the modular electronic system before the module is removed, monitoring an internal temperature at the modular electronic system, and providing an indication that the module is ready for removal upon reaching a specified cooling state at the modular electronic system based on the temperature monitoring. A panel on an adjacent module is opened and extends into the slot upon removal of the module to substantially block airflow bypass from the slot and maintain cooling within the modular electronic system. An apparatus and logic are also disclosed herein.

Abstract: An injection molding machine capable of opening/closing a movable mold relative to a stationary mold by moving a crosshead backward and forward to move a movable platen backward and forward relative to a stationary platen through a toggle link. The injection molding machine includes a reciprocating mechanism that receives a counterforce exerted on the crosshead in the back-and-forth direction when the movable mold and the stationary mold are closed, and a load acquisition unit that acquires a load exerted on the reciprocating mechanism in a direction perpendicular to the back-and-forth direction of the crosshead.

Abstract: A toggle clamping mechanism for an injection molding machine includes a toggle link, a crosshead connected to the toggle link, and a driving device for driving the crosshead. A ball spline shaft is provided parallel to a ball screw for driving the crosshead. Further, a ball spline nut provided in the crosshead is engaged with the ball spline shaft so that the crosshead may be guided by the ball spline shaft.

Abstract: A mold assembly comprises a first (1) and a second mold part (2) said mold assembly further comprising a hinge mechanism optionally detachably connected to the two mold parts.

Abstract: In a toggle type mold clamping device including a plurality of link units, a coupling portion of a first link coupled with a toggle driving link is provided on an outer side of an area between a coupling portion of the toggle driving link coupled with a crosshead and a center line of the first link. Furthermore, the first link has a structure in which two members arranged in parallel are coupled and integrated with each other and a space through which the toggle driving link passes is formed between the two coupled members.

Abstract: A drive system for double toggle mechanisms used to move upper and lower platens with an electric servo motor-gear box drive shaft driving a crank arm arranged to drive a respective double toggle mechanism in turn connected to the platen. The drive shaft axis is located below the toggle mechanism link pivots and driven in a direction so that the motor acts to assist the double toggle mechanism in lifting the platen, reducing the servo motor peak load. The various components are arranged for symmetrical loading of the pivots concerning the toggle links to increase the evenness of the platen when being raised or lowered.

Abstract: A die opening and closing device for a movable die plate and a fixed die plate includes a toggle link disposed between the movable die plate and a die tightening housing, a cross head for flexing the toggle link, and a motor-driven ball screw penetrating through the die tightening housing and inserted into the cross head, and this die opening and closing device is provided with die thickness adjusting means for adjusting the die thickness S when the die is tightened by extension of the toggle link, and ball screw rotation control means for controlling constant the cracking gap, and a foamed resin molding machine is presented, together with its operating method.

Abstract: The invention relates to a method and a device for blow-moulding containers from preforms which have been previously heated in a heating section and consist of a thermoplastic material. After being heated, said preforms are transferred to a blowing device in which they are deformed in order to form containers under the action of a blowing pressure inside blow moulds. The blow moulds respectively consist of at least two blow-moulding segments. The preforms are transported together with the blow moulds at least along part of a path of a rotating blow wheel. The blow-moulding segments are braced in relation to each other during at least part of the blow-moulding process. At least one of the blow-moulding segments is pivoted about a rotational axis in order to perform opening and closing movements.

Abstract: Mold clamping mechanism of an injection molding machine with a movable platen (10), a fixed platen (12) and a support section (9) connected to the movable platen (10) through connecting links, wherein, when clamping force is applied via the connecting links, a force is transmitted to the front face (9A) of the support section (9), wherein at least one recess (25) is arranged between the front face (9A) and the back face (9B) of the support section (9), which is formed in such a manner that those regions of the front face (9A) of the support section (9) to which the force (FH) is transferred are evenly deformed when force is applied.

Abstract: A drive system for double toggle mechanisms used to move upper and lower platens with an electric servo motor-gear box drive shaft driving a crank arm arranged to drive a respective double toggle mechanism in turn connected to the platen. The drive shaft axis is located below the toggle mechanism link pivots and driven in a direction so that the motor acts to assist the double toggle mechanism in lifting the platen, reducing the servo motor peak load. The various components are arranged for symmetrical loading of the pivots concerning the toggle links to increase the evenness of the platen when being raised or lowered.

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

Abstract: A method of aligning die and stamping substrate for nano-imprint lithography is described. The method includes aligning the die by linearly displacing the die along a first axis using a first flexure member and pressing the die along a second axis substantially perpendicular to the first axis while maintaining coupling of the die with the first flexure member.

Abstract: A mould holding cross member (9) according to the invention comprises a support base (91) a suitable to compress the mould (S) and more projecting, in the mould closing direction, than the ends (90) with which the cross member is connected to the moving columns (6) of the press on which it is fitted. The base (91) is connected to the rest of the cross member by a narrow portion (99) which extends in the central area of the base and between the projections of the hinging areas (7, 8) of the double toggle of the press on the press bed (2), and substantially not outside those projections. In this way the pressures are more uniformly distributed on the mould (S). The present invention also concerns a press fitted with a cross member (9) as defined above.

Abstract: A press has a frame including guides extending in a predetermined direction and a pair of tool-halves mounted on the frame and are movable on the guides in the direction toward and away from each other. Two knee-lever linkages symmetrically spacedly flanking each tool half with respect to a center plane substantially parallel to the direction, each coupled to the respective tool half and to the frame, and operable to shift the tool halves in the direction. Respective reversible, rotary drives each carry an eccentric output connected to respective drive links extending to the linkages. A controller connected to the drives rotates the eccentrics oppositely in respective first senses to press the one half in the direction against the other half and thereafter to pull the one half in the direction away from the other half with the two linkages never extending into a central region of the machine.

Abstract: A die opening and closing device for a movable die plate and a fixed die plate includes a toggle link disposed between the movable die plate and a die tightening housing, a cross head for flexing the toggle link, and a motor-driven ball screw penetrating through the die tightening housing and inserted into the cross head, and this die opening and closing device is provided with die thickness adjusting means for adjusting the die thickness S when the die is tightened by extension of the toggle link, and ball screw rotation control means for controlling constant the cracking gap, and a foamed resin molding machine is presented, together with its operating method.

Abstract: The present invention provides a vertical molding machine whose mechanisms can be simplified and whose cost can be lowered. The vertical molding machine includes a frame; an upper platen (31) fixed to the frame and having an upper mold (41) mounted thereon; a connection member disposed in such a manner as to extend downward from the upper platen (31); a lower base member held by the connection member under the upper platen (31); a lower platen (35) disposed in a manner capable of advancing and retreating along the connection member and having a lower mold mounted thereon; and a mold-clamping drive section which advances and retreats the lower platen (35) so as to bring the lower mold in contact with the upper mold (41) or move the lower mold away from the upper mold (41) for effecting mold closing, mold clamping, and mold opening. The lower base member is moved downward by a mold-clamping force generated by the drive section at the time of mold clamping.

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

Abstract: A driving device for moulds for the production of containers, for example, bottles or the like made of polyethylene, polypropylene or other plastic materials, in which the moulds (2) consist of two half-shells (3) designed to be brought together and pressed against one another along outer profiles (4), has a unit (7) which drives the movement of the half-shells (3), to which an electric main drive and a mechanical auxiliary drive, in particular hydraulic or pneumatic, are connected.

Abstract: A toggle mechanism of an injection molding machine consists of upper and lower toggle assemblies, which are pivoted to a fixed tail support at a first end, and a movable mold support of an injection molding machine at a second end; each of the toggle assemblies has two toggles pivoted together, each of which has pivotal holes on two ends; pivotal rods are passed through corresponding pivotal holes of the toggles to pivot the toggles together; pivotal rods are used to pivot the toggle assemblies to the fixed tail support and the movable mold support; each pivotal rod has oil holes in radial and axial directions; the oil holes communicate with the pivotal holes of the toggles, and each toggle has an internal oil passage communicating with its pivotal holes; lubricating oil will circulate in the toggle mechanism after conduits and filtering barrels are connected to the pivotal rods.

Abstract: A toggle mechanism of an injection molding machine consists of upper and lower toggle assemblies, which are pivoted to a fixed tail support at a first end, and a movable mold support of an injection molding machine at a second end; each of the toggle assemblies has two toggles pivoted together, each of which has pivotal holes on two ends; pivotal rods are passed through corresponding pivotal holes of the toggles to pivot the toggles together; pivotal rods are used to pivot the toggle assemblies to the fixed tail support and the movable mold support; each pivotal rod has oil holes in radial and axial directions; the oil holes communicate with the pivotal holes of the toggles, and each toggle has an internal oil passage communicating with its pivotal holes; lubricating oil will circulate in the toggle mechanism after conduits and filtering barrels are connected to the pivotal rods.

Abstract: A die press is described. In one embodiment, the die press includes an alignment mechanism having one or more flexure members coupled to a die to maintain coupling with the die during a pressing operation.

Abstract: The purpose of the invention is to prevent a sticking of lubricant to a ball screw shaft and a scattering to the circumstance in an electromotive toggle mold clamping device. This invention relates to the electric motor driven toggle mold clamping device wherein a ball nut member is screwed together to the ball screw shaft which rotates by an electric motor to advance and retreat freely and a cross head is fixed to the ball nut member, a cylindrical or polygonal cylindrical member which has a cylindrical body shape or square cylindrical body shape with a length and a size of placing the ball screw shaft with a required gap while retreating the cross head, is attached to the front ends of the cross head concentrically with the ball screw shaft. The ball screw shaft protruding from the cross head is placed in the cylindrical or polygonal cylindrical member having a required gap.

Abstract: A toggle type mold clamping mechanism for preventing the degradation of parallelism between stationary and movable platens, which is caused due to a clearance between a pin and a bushing, with use of a simple construction. A mold clamping force acting on the pin is transmitted through the bushing to a link L1, thereby moving the movable platen to perform mold clamping. A pre-pressure exerting in the same direction as the direction of a mold clamping force generated at the time of mold clamping is applied by a spring or the like to move the pin toward the link L1. Even a mold opening force is exerted at the time of mold opening, the pre-pressure c provided by the spring or the like keeps the position of the clearance ? between the pin and the bushing unchanged. Since the link L1 pulled by the spring or the like is moved to follow the pin (so that the pin is not moved alone by an amount of clearance ?), the parallelism between the stationary and movable platen is not degraded.

Abstract: A molding machine includes a movable mold support apparatus, the movable mold support apparatus including a mold mounting plate, a first load receiving part and a second load receiving part, and a load transmit member having a first end connected to both the first load and the second load receiving parts and a second end connected to a rear surface of the mold mounting plate, wherein a distance between the center of the mold mounting plate and the second end of the load transmit member is shorter than a distance between the center of the mold mounting plate and the first load receiving part and the second load receiving part.

Abstract: The invention relates to a clamping device for an injection molding machine for plastics, including a fixed platen (11) which is connected to a moving platen (12) by means of a toggle mechanism (13). A hollow-shaft motor (7) is provided to cooperate with a spindle (21) for operating the toggle mechanism, wherein the hollow-shaft motor (7) is connected to the toggle mechanism (13). According to the invention, the spindle (21) is arranged in a rotationally fixed manner, the end of the spindle (21), facing the moving platen (12), is in engagement with the rotor (6) of the hollow-shaft motor (7), and the stator (4) of the hollow-shaft motor is connected with the toggle mechanism (13). Preferably, a spindle nut is fixed in the rotor (6) for engagement with the spindle (21), preferably in the form of a recirculating ball screw.

Abstract: A system for minimizing platen drive shaft flex in a thermoforming press employed in a thermoforming process is provided. The thermoformer press molds plastic sheets into finished articles. The system minimizes rotational vibrations in a platen drive shaft that actuates the thermal press. Reenforcing plates, or doubler plates, are added as auxiliary frame members, to reduce flex in the platen drive shaft. The doubler plates support the drive shaft along the length of the shaft. The doubler plates include bearings positioned proximate to linkages. The linkages interconnect the drive shaft and the platens. The doubler plates are preferably positioned proximate to the linkages, on the drive shaft and opposite frame bearings. The system can include yoked pivots to support both sides of bearings in the linkages between the drive shaft and the platen. The yoked supports evenly transmit forces between the platen drive shaft to the platens.

Abstract: A drive apparatus for an injection molding machine comprises a drive means, a rotation transmission shaft, a screw shaft, a nut and a driven member. The rotation transmission shaft is connected to the drive means and rotated by the drive means. The screw shaft is rectilinearly movably disposed, surrounds the rotation transmission shaft, and engages with an outer cylindrical surface of the rotation transmission shaft on an inner cylindrical surface of the screw shaft. The nut is threadably engaged with the screw shaft. The driven member is disposed on the screw shaft. In this apparatus, the rotation generated by the drive means is transmitted to the screw shaft and the screw shaft is advanced and retracted not to rotate the nut. Therefore, the inertia of the drive apparatus becomes small and the response of mold opening/closing becomes rapid when the drive mean is driven.

Abstract: A clamping apparatus includes upper and lower platens; one or more tiebars connecting the platens; and an intermediate platen between the upper and lower platens for movement relative to and along the tiebars. Upper and lower mold halves are provided on the upper and intermediate platens, respectively. A linkage connects the lower and intermediate platens. The linkage includes upper and lower links connected with each other for rotation on an intermediate shaft. The upper and lower links are pivotably supported on first and second shafts fixed to the intermediate and lower platens, repectively. The intermediate shaft is operatively connected with a drive mechanism so that the drive mechanism transmits a driving force to the linkage, and the lower platen is moved relative to the intermediate platen. A set of a radical needle bearing and a thrust bearing is used for at least one of the intermediate, first, and second shafts.

Abstract: A clamping unit for use in an injection molding machine is proposed, wherein a plurality of tie bars are symmetrically positioned and mounted in parallel to corners of a front platen and a rear platen, and a movable platen is movably sleeved about the tie bars and positioned between the front and rear platens. A servo-motor mounted on the rear platen acts as a power source for operating the clamping unit. A belt-gear mechanism associated with the servo-motor transmits torque force and turning speed provided from the servo-motor to a ball screw transmission mechanism connected to the belt-gear mechanism. The ball screw transmission mechanism converts the torque force into axial pushing force, so as to drive a toggle linkage mechanism that interconnects the rear platen and the movable platen, and move the movable platen along the tie bars for performing mold-opening and mold-clamping operations.

Abstract: A blow molding apparatus having a mold clamping apparatus of the clam shell type, and having a linkage controlling the opening and closing of the mold, the linkage being comprised of two links pivotally connected to each other and driven by a pneumatic or hydraulic cylinder. The links are configured to provide the cylinder with mechanical advantage so that little mold separation force is recognized at the cylinder.

Abstract: A peak current value of a mold clamping servomotor driving a toggle type mold clamping apparatus during mold clamping is proportioned to a mold clamping force. A peak current value is obtained every predetermined number of molding cycles during automatic operation and a difference between the obtained peak current value and a reference peak current value is obtained. An amount of change in a mold clamping force and an adjustment amount of a rear platen are determined according to the difference. The rear platen is moved on the basis of the adjustment amount and control is made so as to attain a set mold clamping force.

Abstract: An ejector device (200) for ejecting articles for injection molding machines for plastic materials comprising a movable mold-holding plate (13) supporting a mold half (20) defining a profile whereon a molded article (21) is formed, and moved by a double toggle mechanism comprising connecting rods (18) connected to the movable mold-holding plate (13); the device (200) for ejecting articles comprising a movable ejector plate (3) supported in translation by means of supporting columns (4) fixed to the movable mold-holding plate (13), and a pin (2) connected to the movable ejector plate (3) and acting on an ejector table (1) arranged into a mold half cavity (51) to favor ejection of the molded article (21), the movable ejector plate (3) being moved by means of lever mechanism driven by a ball screw (35) actuated by an electric motor (40).

Abstract: A stationary platen and link housing are coupled to each other through tie bars. A movable platen is coupled to a front surface of the link housing through a toggle mechanism. Two slide bars are fixed to the back surface of the movable platen and each slide bar extends in a parallel way from a back surface toward the moving direction of the movable platen. Two hollow shafts are each fixed to the front surface of the link housing so as to correspond to the slide bar. Each hollow shaft extends in a parallel way from a front surface toward the moving direction of the movable platen. Each respective slide bar is inserted into the inside of the corresponding hollow shaft to allow it to slide along the inside of the hollow shaft.

Abstract: A clamping unit for use in an injection molding machine is proposed, wherein a plurality of tie bars are symmetrically positioned and mounted in parallel to corners of a front platen and a rear platen, and a movable platen is movably sleeved about the tie bars and positioned between the front and rear platens. A servo-motor mounted on the rear platen acts as a power source for operating the clamping unit. A belt-gear mechanism associated with the servo-motor transmits torque force and turning speed provided from the servo-motor to a ball screw transmission mechanism connected to the belt-gear mechanism. The ball screw transmission mechanism converts the torque force into axial pushing force, so as to drive a toggle linkage mechanism that interconnects the rear platen and the movable platen, and move the movable platen along the tie bars for performing mold-opening and mold-clamping operations.

Abstract: A clamping apparatus includes upper and lower platens; one or more tiebars for connecting the platens; an intermediate platen provided between the upper and lower platens for movement relative to and along the tiebars. Upper and lower mold halves are provided on the upper and intermediate platens, respectively. A linkage is provided for connecting the lower and intermediate platens. The linkage includes upper and lower links connected with each other for rotation on an intermediate shaft. The upper and lower links are pivotably supported on first and second shafts fixed on the intermediate and lower platens, respectively. The intermediate shaft is operatively connected with the drive mechanism so that the mechanism transmits a driving force to the linkage, so that the lower platen is moved relative to the intermediate platen. A set of radial needle bearing and thrust bearing is used for at least one of the intermediate, first and second shafts.

Abstract: A mold closing unit for an injection molding machine or press; includes a drive mechanism, and a toggle mechanism having a first pair of linkages which are connected to one another at a first knuckle point. One linkage is connected to a stationary component at a second knuckle point and the other linkage is connected to a movable mold mounting plate at a third knuckle point. At least one of the linkages is operatively connected to the drive mechanism at a fourth knuckle point, wherein the fourth knuckle point is spaced from the first knuckle point by a first distance, and spaced from the second knuckle point by a second distance, wherein a sum of the first and second distances is greater than 1.2 times a distance between the first and second knuckle points.

Abstract: A mold locking device for a molding machine has a toggle assembly, and a transmission member. The toggle assembly has first toggle arms pivoted to a bearing disc of the molding machine, connecting arms pivoted to a movable mold base, second arms pivoted to both the first arms and the connecting arms, and has third arms pivoted to both the second arms and a co-moving disc movable between the bearing disc and the movable mold base. The transmission member has a power source, a connecting member and an elongated screw. The connecting member connects the power source and a nut turnably fitted on the co-moving disc; the screw is passed through the nut for permitting the nut to turn relative to, and move along, the screw. The screw is further connected to the movable mold base such that the movable mold base can be moved between a mold opening position and a closing position by the toggle assembly and the power source.

Abstract: A closing unit for an injection molding machine for processing plastic material includes a fixed mold mounting plate connected to a moveable mold mounting plate by means of a crank or toggle lever mechanism, which is operated by at least two motor-driven spindles arranged in series and having thread pitches in an opposite manner. One spindle is operatively connected to the fixed mounting plate, whereas the other spindle is connected to the crank or toggle lever mechanism. A sleeve-like force transmission element is arranged concentrically in relation to the spindles. Spindle nuts are respectively provided on opposite end faces of the force transmission element and interact with the power transmission element and the spindles.

Abstract: The invention has an object to omit the opening and closing operation source of a clamping linkage apparatus by opening and closing operation the linkage plate with the mold clamp movement, and make it applicable to hydraulic or electric mold clamp apparatus without modifying the structure.

Abstract: A molding machine includes a movable mold support apparatus, the movable mold support apparatus including a mold mounting plate, a first load receiving part and a second load receiving part, and a load transmit member having a first end connected to both the first load and the second load receiving parts and a second end connected to a rear surface of the mold mounting plate, wherein a distance between the center of the mold mounting plate and the second end of the load transmit member is shorter than a distance between the center of the mold mounting plate and the first load receiving part and the second load receiving part.

Abstract: An injection moulding machine with a closing unit with a stationary and a moveable die platen (1, 2) and a closing mechanism for the moveable die platen (2). The closing mechanism includes a pair of toggle levers opposite one another in mirror image, with two levers of unequal length (4, 5, 6, 7), wherein one lever (7) is pivotally connected to the stationary die platen (1) and the second lever (6) to the moveable die platen (2) respectively. Further, a drive mechanism is provided for the pairs of toggle levers (4, 5, 6, 7).

Abstract: A double-action mechanical press is capable of easily keeping the dynamic balance, simpler in structure and provides an improved processing accuracy by maintaining the parallelism in upper and lower rams. The double-action mechanical press has a crank mechanism within a double-action crown. The crank mechanism comprises a crankshaft having two of first eccentric sections and two of second eccentric sections. A bed includes two oppositely rotatable toggle linkage mechanisms which rotate oppositely from one another. The two first eccentric sections are connected to the upper ram to move it in the upward and downward directions. The two of second eccentric sections are connected to the lower ram through a plurality of upright rods with the two toggle linkage mechanisms to move the lower ram in the upward and downward directions.

Abstract: An apparatus having a movable mold clamping seat for high temperature fluid injection molding includes a barrel supporting seat, a barrel, a injecting nozzle, a set of hydraulic cylinders, a static platen, a movable plate and a mold. The barrel supporting seat is jointed to a machine body. The barrel has one end fixed to the barrel supporting seat, and the injecting nozzle is fixed to the other end. The static platen is movable on the machine body. One end of each hydraulic cylinder is fixed to the barrel supporting seat, while the end of is fixed to the static platen. The center lines of the hydraulic cylinders are in the same plane as the center line of the barrel. By pulling the hydraulic cylinder, the injecting nozzle passes through a hole in the static platen to contact a sprue bushing for injecting a high temperature fluid into the mold.

Abstract: The mold clamping device with improved transmission mechanism includes: a middle platen 2 fixedly supported by a support base 1 and carrying the lower metallic mold 6; and front tie-bars 3a extending slidably therethrough. A movable platen 4 carrying the upper metallic mold 7 is secured to the top ends of the front tie-bars 3a. The horizontal connecting bar members 5a and 5b connect the bottom ends of the front and the rear tie-bars 3a and 3b. The middle platen 2 and the horizontal connecting bar members 5a and 5b are operatively coupled by means of the pantograph mechanism consisting of flat bar-shaped links 15a and 15b, whose front and rear joints are pinned to annular links 16a and 16bengaging with a left-and-right-handed ball thread member 17 driven by a driving source.

Abstract: A drive unit (21) is actuated to rotate a ball screw (20). Then, a ball nut (19) included in the ball screw and a cross bead (18) advance toward a movable platen (16) to extend a toggle link mechanism (17) gradually. Consequently, the movable platen (16) advances along tie bars (14), a movable platen support member (24) attached to the movable platen (16) moves on a base frame (11) and a movable mold (22) is brought into contact with a stationary mold (23). When the mold consisting of the movable mold (22) and the stationary mold (23) is thus clamped, a part of the frame provided with a recess (27) of the movable platen support member (24) is deformed elastically to permit the deformation of the movable platen (16) and movable mold (22). Thus the movable platen (16) is not restrained from deformation, clamping force can be uniformly applied to the mold and accurate moldings can be molded.

Abstract: A die clamping apparatus including a movable plate which is in connection with a pushing-out pin which is projected from and retracted to a moving die and which is held movably with respect to a moving die plate, a clamp member for obtaining a constraint of the movable member, an air cylinder and a hook member. Only a movement of the movable member is constraint by the air cylinder with respect to the moving die plate when the latter is moved in a die opening direction from a die opening limit position, so that a resultant relative movement between the movable plate and the moving die plate, which causes the pushing-out pin to be projected from the moving die, resulting in a removal of a molded product, while the constraint of the movable member prevents the moving die plate from being moved in the die closing direction when the moving die plate in the die opening limit position is under non clamping condition.

Abstract: A mold clamping apparatusm for an injection molding machine comprises a stationary platen fixedly holding the stationary mold, a movable platen fixedly holding the movable mold and disposed opposite to the stationary platen, tie bars for guiding the movable platen for movement toward and away from the stationary platen, a movable platen driving means for moving the movable platen along the tie bars to close and open the mold, a movable platen fixing means for fixing the movable platen to the tie bars at a set position immediately before a position where the movable mold is joined to the stationary mold, and a clamping force applying means comprising sealed hydraulic cylinder actuators capable of converting energy of a hydraulic fluid into an intensified mold clamping force and of applying the intensified mold clamping force to the stationary platens.

Abstract: A mold closing apparatus in which two linearly-shiftable mutually juxtaposed yokes carry respective halves of a mold for shaping thermoplastic articles. A linear force generator acts directly on each of the yokes in a line and in line with the direction of shifting movement for selectively drawing the yokes together and displacing them apart. The closing forces are applied symmetrically to both yokes.