Abstract: The low profile of the flexible tooling system disclosed allows for flexible tooling to be added to nearly all CNC machines with an accommodating z-axis height and allows easier relocation of the system from one CNC machine to another. The system includes one or more pods, each of the pods of the system replacing the function of four independent actuators of earlier systems but operating with a shared mechanical frame. Arranging the mechanism into groups of four allows for greater density of part support spacing, minimizes cable requirements, and allows for air, vacuum, and vacuum sensor requirements be localized on each pod. The pods allow for part supports to be spaced as close as 6? in the x and y axis. An increased variable position assembly density allows for greater flexibility to hold complicated parts.

Abstract: The low profile of the flexible tooling system disclosed allows for flexible tooling to be added to nearly all CNC machines with an accommodating z-axis height and allows easier relocation of the system from one CNC machine to another. The system includes one or more pods, each of the pods of the system replacing the function of four independent actuators of earlier systems but operating with a shared mechanical frame. Arranging the mechanism into groups of four allows for greater density of part support spacing, minimizes cable requirements, and allows for air, vacuum, and vacuum sensor requirements be localized on each pod. The pods allow for part supports to be spaced as close as 6? in the x and y axis. An increased variable position assembly density allows for greater flexibility to hold complicated parts.

Abstract: An apparatus for the forming of a lay-up of fiber composite material, in particular in the aerospace sector is provided. In this case, the apparatus has at least one forming tool, which has a surface contour corresponding to a desired geometry of the lay-up after the forming, and a tool carrier, to which the at least one forming tool is releasably fastened. From a further viewpoint, the invention makes available an apparatus with a modular structure, it then being possible for any desired forming tools to be combined with the tool carrier according to requirements. This leads in particular to less laborious handling, since it obviates the need for handling of the comparatively large tool carrier.

Abstract: A mold clamping device includes a fixed platen on which a fixed mold is disposed, a movable platen on which a movable mold that defines a cavity along with the fixed mold is disposed, a tie bar configured to resist a mold clamping force that is generated between the fixed platen and the movable platen, and a half nut opening and closing device configured to grip the tie bar, thereby locking the movable platen and the tie bar, in which the half nut opening and closing device includes half nuts configured to grip the tie bars, an actuator which is disposed on the movable platen and configured to move the half nuts back and forth with respect to the tie bars, and a clevis configured to connect the actuator to the half nuts so as to allow the actuator to swing with respect to the gripping member.

Abstract: A mold clamping device for an injection-molding machine includes a fixed platen, a movable platen, pressure pads for generating a clamping force, and a spindle drive for moving the movable platen. The spindle drive has a non-rotating spindle shaft and a spindle nut which can be rotationally driven by a motor. The spindle shaft has a threaded portion in engagement with a matching thread of the spindle nut. To permit a free relative movement between the spindle drive and the movable platen, a piston-cylinder unit is in operative connection with the spindle drive and has on both sides of the piston pressure medium spaces, which can optionally be hydraulically blocked or connected to one another. In the latter state, the spindle drive is decoupled from the movable platen and freely floating with respect to it.

Abstract: A method and apparatus for low pressure molding are disclosed. The molding apparatus comprises a frame, a mold assembly and a transmission assembly. The mold assembly may comprise a first mold and a second mold, the second mold being coupled to the frame. The transmission assembly may be coupled to the frame and to the first mold. A motor may be coupled to the transmission assembly for moving the first mold relative to the second mold. A pneumatic actuator may also be coupled to the transmission assembly for increasing clamping pressure between the first mold and the second mold.

Abstract: A locking device for columns of presses with two pairs of locking clamps, wherein the locking clamps of one or both the pairs are mechanically connected to each other through at least one mechanism suited to guide in a synchronized way the relative translational motion of the two locking clamps of the same pair, and wherein the guide mechanism is integral with the moving plane in at least one fixed point, thus guaranteeing the symmetry of the motion of the locking clamps with respect to the fixed point.

Abstract: An injection molding machine may include a split mold where a gas discharge portion is formed at parting surfaces. Further, the cross-section of a flow passage of the gas discharge portion may be reduced at a predetermined timing after the start of the filling of a molding material. Since the cross-section of the flow passage of the gas discharge portion is reduced after a cavity space starts being filled with a molding material, it may be possible to make the amount of gas, which flows through the gas discharge portion, large until the cross-section of the flow passage of the gas discharge portion is reduced. It may be possible to prevent a foreign material from adhering to the inner peripheral surface of the gas discharge portion.

Abstract: An injection foam molding machine according to the present invention includes: a clamping unit that moves a movable die plate 3 relative to a fixed die plate 2 to clamp the die plates; a fixed side mold attached to the fixed die plate 2; a movable side mold attached to the movable die plate 3; a plurality of drive units 50 that widen an interval between both of the die plates 2 and 3; and a die-plate-interval adjusting unit 60 that adjusts a distance over which the movable die plate 3 is moved by the drive units 50, and when a molten foam resin is foamed, an inner-side interval within the mold cavity is determined, and thus an accurate molded product can be obtained.

Abstract: Disclosed is an injection mold, comprising a moving half, a fixed half and a plurality of bearing plates positioned therebetween. The moving half comprises a moving half plate and a moving half core positioned thereon. The fixed half comprises a fixed half plate and a fixed half cavity positioned thereon. The bearing plates are positioned on one of the fixed half plate and the moving half plate and a bearing surface is formed thereon. The moving half core and the fixed half cavity contact with each other partially to form an arrangement surface. With the bearing plates positioned therebetween, the bearing surface and the arrangement surface can undertake the closing mold pressure generated by an injection molding machine together for reducing the arrangement surface area. The molding is easy and cost drops to improve productivity. The closing mold balance of the entire injection mold can be preferably ensured.

Abstract: It may be possible to suppress the clogging of a gas vent, to simplify the maintenance of a mold device, and to improve the preform productivity. The invention may be applied to an injection molding machine including a split mold where a gas discharge portion is formed at parting surfaces. Further, the cross-section of a flow passage of the gas discharge portion is reduced at a predetermined timing after the start of the filling of a molding material. Since the cross-section of the flow passage of the gas discharge portion is reduced after a cavity space starts being filled with a molding material, it may be possible to make the amount of gas, which flows through the gas discharge portion, large until the cross-section of the flow passage of the gas discharge portion is reduced. It may be possible to prevent a foreign material from adhering to the inner peripheral surface of the gas discharge portion.

Abstract: An installation (100) for the manufacture of ceramic products comprises a mold (1) divided into at least two parts (2, 3) forming an internal cavity (C) where the ceramic product is formed, and mobile towards and away from each other, under the action of respective drive means (4) acting in both directions along a predetermined clamping line (S), in such a way as to join or detach the parts (2, 3) to/from each other; each part (2, 3) of the mold (1) comprises at least one rear outside surface (2p, 3p) and one lateral outside surface (2s, 3s); at least one of the parts (2, 3) is equipped with means (6) for containing and controlling a fluid and encompassing the rear (2p, 3p) and lateral (2s, 3s) outside surfaces of the mold (1) part (2, 3); the containment means (6) are associated with the part (2, 3) of the mold (1) in such a way that during the product casting cycle the forces (SF) acting on the part (2, 3) of the mold (1) are constantly compensated by correlated forces (FR).

Abstract: In a method of controlling an injection molding machine M which controls specified operational processes in a molding cycle by variably controlling the rotation speed of a driving motor 3 in a hydraulic pump 2 and driving a specified hydraulic actuators 4a, 4b, . . . , in lowering the pressure Pd of the operational process to a specified pressure Pn, the pressure Pd is forcibly lowered by controlling the driving motor 3 in reverse rotation.

Abstract: A molding apparatus comprises first and second mold chases that are configured to clamp an electronic device therebetween, and a driving mechanism which drives the first and second mold chases to apply a clamping force onto the electronic device. A pressure adjustment mechanism communicates with at least one of the mold chases and applies an additional clamping pressure onto one or more portions of the mold chase. The pressure adjustment mechanism comprises movable supports that are displaceable in directions which are substantially perpendicular to the direction of the clamping force so as to transmit and apply the said additional clamping pressure onto the mold chase, and also a plurality of piezoelectric actuators which are operative to apply displacement forces to the movable supports in their displacement directions.

Abstract: When constructing an injection molding machine M that is equipped with hydraulic pumps 2, which control discharge flow rates by variably controlling the number of revolutions of a drive motor 3, and that drives hydraulic actuators 4a . . . by these hydraulic pumps 2; the injection molding machine M is equipped with a hydraulic drive member 6 having multiple hydraulic pumps 2p and 2q, and a hydraulic oil supply circuit 5 jointly or individually supplying hydraulic oil to be discharged from multiple hydraulic pumps 2p and 2q to a hydraulic actuator 4a, 4b, 4c, 4d or 4e selected from the multiple hydraulic actuators 4a . . . .

Abstract: The invention relates to a method for manufacturing at least partly plastic vehicle parts in a mold with at least one mold cavity, comprising the steps of: at least partly closing the mold, wherein the at least one mold cavity is brought in a first position by means of at least one movable wall part of the at least one mold cavity; introducing plastic into the at least one mold cavity; upon complete closure of the mold and/or movement of the at least one movable wall part, bringing the at least one mold cavity in a second position, the at least one mold cavity in the second position having a different volume than in the first position; all this in such a manner that by bringing the at least one mold cavity from the first into the second position, the plastic fills the respective mold cavity completely.

Abstract: A method of molding a minute shape, in which at least one of a pair of dies is provided with an uneven section of a minute shape on a molding surface thereof, clamping of the pair of dies is stopped immediately before the dies are completely clamped, a resin is injected into a cavity, and thereafter the dies are completely clamped to thereby transcribe the shape of the uneven section onto the resin includes preparing a plurality of transcription dies each provided with the uneven section on a molding surface thereof, heating one of the transcription dies which is not used to mold a product by a heating unit, and exchanging the transcription dies with each other, at a point in time at which molding is completed, to thereby mold the product continuously.

Abstract: An injection molding apparatus capable of minimizing cracks at the corners of a mold is provided. The injection molding apparatus includes first and second molds that mate with each other to define a molding cavity, a stationary member that supports the first mold, a movable member that supports the second mold and moves backwards and forwards together with the second mold, and a plurality of pressing members installed around the first mold so as to press a periphery of the first mold toward the molding cavity by a pressing force of the movable member when the first mold is mated with the second mold.

Abstract: A clamp actuator of a molding system is provided. The clamp actuator includes a first actuator configured to be interactable with a rod; and a second actuator configured to be interactable with the first actuator. The first actuator is configured to apply a clamping force to the rod; and the second actuator is configured to apply a force opposing the clamping force to the first actuator. Responsive to actuating the first actuator, the rod is drivable between (i) a home position in which a clamping force is not applicable to the rod, and (ii) a force application position in which the clamping force is applicable to the rod. Responsive to a mold flash occurring which exceeds the clamping force, the rod is moveable into a mold flash position beyond the home position.

Abstract: An injection compression moulding apparatus comprises two mould parts which define a mould cavity and are mounted on two relatively movable platens of an injection moulding press. An actuator is arranged in series with the platen action on at least one of the mould parts and is controlled in synchronism with the movement of the platens to enable the relative speed of the two mould parts during a mould closing phase of each article moulding cycle to be modified, the speed of relative movement of the mould parts being the vector sum of the speeds of movement and the platens and the actuator.

Abstract: A mold adjustment device of an injection molding machine is required for movement of a rear template that moves depending on a size of a mold in a toggle clamp of the injection molding machine. At this time, a spherical bearing and/or a bushing is attached to an outer circumference of a nut of a tie bar gear that rotates along a tie bar and a tie bar screw enduring a clamping force of the toggle clamp so as to be contacted with the rear template. This mold adjustment device clears up any factor generating vibration or noise during the injection molding, thereby remarkably decreasing stoppage generated during the mold adjustment process and also relatively reducing vibration and noise.

Abstract: An injection molding machine is proposed, especially for injection stamping of large-area plastic moldings, that has at least a first injection mold which has two mold halves and which forms a first cavity with a first projected area, and a second injection which has two mold halves and which forms a second cavity with a second projected area, one mold half of each of the two injection molds being fixed on a common carrier unit. A support means for the two injection molds acts in the opening direction. In order to limit the force acting on the respective cavity, the support means, depending on the respective projected area of the respective cavity, partially take up the clamping force so that a holding pressure force acting on the material which has been injected into the respective cavity is set.

Abstract: A mold closing device for injection molding machines, especially injection molding machines for plastic material, comprises two mold closing plates (10, 12) movable relative to each other. A displacing means (22) with an electromotive drive (26) is provided for opening and closing the mold closing plates (10, 12). According to the invention, the electromotive displacing means (22) that allows for a quick and positionally accurate opening and closing, is connected to a hydraulic holding means (24) for generating a holding force.

Abstract: An injection compression moulding apparatus comprises two mould parts which define a mould cavity and are mounted on two relatively movable platens of an injection moulding press. An actuator is arranged in series with the platen action on at least one of the mould parts and is controlled in synchronism with the movement of the platens to enable the relative speed of the two mould parts during a mould closing phase of each article moulding cycle to be modified, the speed of relative movement of the mould parts being the vector sum of the speeds of movement and the platens and the actuator.

Abstract: The invention relates to a hydraulic device for the back and forth movement and locking of a machine part, in particular for the opening, closing and locking of an injection molding tool. The hydraulic device comprises a cylinder (1), in which a first pressure space (6) is provided, a primary piston (2) with one or several piston rods (11) which may float in a pressure medium within the first pressure space (6) and furthermore an secondary piston (7) which may be axially displaced within the cylinder (1). The invention is characterized in that the auxiliary piston (7) comprises recesses (12), into which the piston rods (11) of the primary piston (2) can be moved and the opposing sides of the primary piston (2) and secondary piston (7) have surfaces (40, 41) which may be brought into contact. In a first movement phase (opening and closing) only the primary piston (2) is moved.

Abstract: A drive unit, in particular for a closing unit, an injection unit, or an ejector of an injection molding machine, may be used where a high axial force is applied through a hydraulic power converter. A cylinder of the power converter may be fixed relative to a frame of the injection molding machine through the intermediary of a holding device which is functionally separate from guidance of the cylinder on the frame of the injection molding machine.

Abstract: A closing device in a hydraulic injection molding machine includes at least one pressure cylinder unit for building up locking pressure and a drive cylinder mounted in the pressure piston of the pressure cylinder unit for closing the injection mold. The drive cylinder is arranged concentrically relative to the central axis of the pressure cylinder unit. A support element for the pressure cylinder is jutted out by at least one cylinder of the mold closing unit on the side opposite to the stationary mold carrier, the cylinder being connected to the support element and stationary as a result thereof. The support element forms thereby a single piece with the stationary cylinder of the mold closing unit that is connected to the support element. This provides a space-saving structure that meets precision requirements for the production of injection molded parts.

Abstract: The present invention relates to a high speed direct mold clamping apparatus. The direct mold clamping apparatus has a grooved channel for the flow of oil inside a clamping cylinder to minimize the flow of oil between inside and outside the clamping cylinder. Then, the clamping ram can perform high speed reciprocation in the clamping cylinder.

Abstract: In a molding machine, a fixed platen which supports a fixed die is disposed on one end of a base plate. A movable platen which supports a movable die and a supporting mount which supports each one end portion of the four tie bars are mounted on slide units. The movable platen and the supporting mount are advanced so as to close the die, a tip portion of each tie bar is locked to the fixed platen by a lock mechanism, and a die clamping cylinder provided on the movable platen is actuated to generate a clamping force so as to execute molding. After that, the lock mechanism executes an unlocking operation so as to cause the movable platen and the supporting mount to retreat to a die open position. Furthermore, an attaching and detaching mechanism releases the die clamping cylinder so as to cause only the supporting mount to significantly retreat from the movable platen, and thus the four tie bars are completely evacuated from the fixed die and the movable die.

Abstract: A thermal pressing machine has a case in which a fixed-side press plate is fixedly provided, a main shaft to which a moving side press plate is attached, a lever arm pivotally attached to the main shaft, a first drive mechanism coupled to a force point at one end of the lever arm, and a second drive mechanism coupled to a supporting point at the other end of the lever arm. The first drive mechanism first causes the lever arm to pivot on the supporting point to greatly move the press plate, and the first drive mechanism is then stopped to operate the second drive mechanism, so that the lever arm pivots on the force point to press the press plate against the press plate.

Abstract: A molding machine including a base frame assembly and a clamping mechanism and an injection mechanism provided on the base frame assembly. The clamping mechanism includes a stationary platen carrying a stationary mold; a movable platen arranged movably relative to the stationary platen and carrying a movable mold; a rear platen disposed at a location opposite to the stationary platen about the movable platen; a tie bar tying the stationary platen and the rear platen with each other; a drive section for applying a drive force to the movable platen so as to move the movable platen relative to the stationary platen; and a platen support movably supporting the movable platen on the base frame assembly. The base frame assembly includes a first base frame supporting a first mass including the stationary platen, and a second base frame supporting a second mass including the movable platen, among the components of the molding machine.

Abstract: A clamping device for injection molding machine is proposed. The clamping device has a movable mold holder, a guiding unit, a screw rod unit, a transmission unit, a first clamping unit, and a second clamping unit. Power from the driving source is transmitted via the transmission unit to the screw rod unit, so as to drive the movable mold holder to move in reciprocating motion. When the mold is actuated to close, the first clamping unit engages to a gear wheel member of the screw rod unit. The gear wheel member and the first clamping unit are driven by the second clamping unit to move for generating a rotational torque, and to drive the screw rod unit for generating a clamping thrust.

Abstract: Method for mold clamping of the present invention is capable of shortening a molding cycle without any initial setting works for an engaging position of a tie bars. The method is constituted the steps of moving the tie bars in the direction of mold closing during mold close operation, judging a relative moving speed between a movable die plate and the tie bar to be within a predetermined value, engaging the tie bars with the movable die plate mechanically by operating an engaging means when the relative moving speed is judged to be within the value, then further moving the movable die plate against a fixed die plate under engagement, and after contact of a movable mold with a fixed mold driving a mold clamping cylinder, thereby executing mold clamping operation.

Abstract: A clamping mechanism for a clamping unit of an injection molding machine includes a drive unit which moves a first platen linearly relative to a fixed second platen and is linked to the first platen for limited movement. A force-application unit builds up a clamping force, when the first platen assumes a closing position. Disposed between the force application unit and the first platen is a locking device which transmits the clamping force and includes a screw mechanism which operates in synchronism with the drive unit and has a screw shaft and a locking nut constructed to normally connect with clearance to the screw shaft via a thread connection and to interact with the screw shaft for transmitting a load, when the clamping force is applied, whereby the threaded connection is forced to self-lock to secure the locking nut on the screw shaft and prevent reverse rotation of the locking nut.

Abstract: The invention relates to a novel method for producing precision parts, especially flat optical data carriers. According to the inventive method, the embossing procedure is program-controlled on the basis of the path function of an electromechanical or hydraulic drive of the driven mold half. When a servomotor is used, the internal path signal thereof can be directly used for calculating the path function or for operating the program control. The novel method allows for a complete speed control of the embossing phase. All factors that can be mechanically influenced from the exterior are detected in more detail for the conditions before and during the embossing phase, thereby allowing for an optimum precision and reproducibility.

Abstract: A mold, a molding machine and a method of molding a plastics material in a mold cavity is described which relies primarily on movement of a part of the mold to provide the pressure necessary to force the plastics material melt to fill all the parts of the mold cavity. The method comprises the steps of applying a light pressure to close the mold, injecting a predetermined quantity of molten plastics material into the mold cavity at a pressure which is such that the injection of the plastics material can cause the cavity to expand in volume against the resistance of the light closing pressure, and applying a high pressure to close the mold fully after completion of the injection step.

Abstract: A nozzle-contacting device of an injection molding machine includes an injection module and a mold-holding structure both set on a lathe bed. The injection module sets a nozzle at a front end thereof and a nozzle-adjusting device, which is fixed and locked on the lathe bed, at a back end thereof. The mold-holding structure includes a mold-clamping structure and an adjusting plate, wherein the mold-holding structure sets plural tie rods. A mold is fixed and locked on the adjusting plate which is sleeved on plural tie rods, and one or more driver set on a front end of a dead plate penetrates the dead plate to connect to the adjusting plate. Furthermore, the dead plate has a perforation set on a center thereof corresponding to a position of the nozzle of the injection module.

Abstract: Injection molding apparatus with a stationary mold clamping plate and a moveable mold clamping plate as well as shafts fixed to one mold clamping plate and passing through openings in the other mold clamping plate, at least one of which has at least one thread on its free end, whereby at least on this free end of the one shaft a drive nut as well as an additional nut for the transmission of the closing force are arranged.

Abstract: A closing device for a mold closing unit includes: at least one hydraulic pressure cylinder unit for generating a mold closing pressure on an injection mold which is accommodated in a mold clamping chamber; a pressure piston disposed in the pressure cylinder unit, a piston rod of the pressure piston is disposed along a central axis of the pressure cylinder unit, and the pressure piston separates a high-pressure chamber of the pressure cylinder unit from a low-pressure chamber thereof; an hydraulic driver cylinder, associated with the pressure cylinder unit, for closing the injection mold assembly, which drive cylinder is disposed concentrically relative to the central axis, and an actual cylinder of the drive cylinder is formed by the pressure piston of the pressure cylinder unit; and an hydraulic compensating cylinder, associated with the pressure cylinder unit, for receiving or respectively dispensing hydraulic medium, which comes from the pressure cylinder unit or respectively is to be dispensed to said pr

Abstract: Method for mold clamping of the present invention is capable of shortening a molding cycle without any initial setting works for an engaging position of a tie bars. The method is constituted the steps of moving the tie bars in the direction of mold closing during mold close operation, judging a relative moving speed between a movable die plate and the tie bar to be within a predetermined value, engaging the tie bars with the movable die plate mechanically by operating an engaging means when the relative moving speed is judged to be within the value, then further moving the movable die plate against a fixed die plate under engagement, and after contact of a movable mold with a fixed mold driving a mold clamping cylinder, thereby executing mold clamping operation.

Abstract: A clamping device for injection-molding machine includes a high-speed screw rod unit having a nut element screwed thereto and a movable mold holder connected to a front end thereof, a clamping screw rod unit screwed to a rear end of the nut element and connected to a transmission assembly, a pre-pressing unit adjustably tightened to the clamping screw rod unit for the latter to generate a pre-pressure against the nut element, and a braking unit adapted to brake the nut element. When the nut element is not braked, the high-speed screw rod unit is driven by the transmission assembly to move forward at high speed for closing mold. And, when the nut element is braked and the clamping screw rod unit is driven by the transmission assembly to rotate relative to the nut element, the nut element is linearly pushed forward to generate a high-pressure clamping force during closing mold.

Abstract: An electromechanical clamping device with hydraulic assistance. A thrust mechanism driven by an electric motor displaces two clamping jaws with respect to each other along a guide device. One clamping jaw is divided into two mutually displaceable part java. A chamber to hold pressure medium is formed between the part jaws. The first part jaw can be displaced along the guide device and locked with respect to the latter. One part jaw is provided with a first cylinder coupled to the output of the thrust mechanism. In order to close the clamping device, in a first step the thrust mechanism pulls the part jaws against the other clamping jaw, and in a second step the thrust mechanism delivers pressure medium from the first cylinder into the chamber between the two part jaws, with the first part jaw locked with respect to the guide device.

Abstract: In a two plate closing unit of an injection molding machine the stationary and the movable mold mounting plates are connected by columns, wherein the columns that traverse the fixed mold mounting plate are fixedly connected to a clamping cylinder in which the columns configured at their ends as pressure plungers configured for generating a clamping pressure reciprocate, and while some of the clamping plungers are dual action plungers, the clamping plungers are coupled to a spindle drive and drive unit, such that the spindle drive is at the same time the control drive for a stepped plunger and the closing force and the closing and opening motion is realized by a single drive which operates the spindle and the plunger cylinder unit.

Abstract: A device for carrying out a two-stage, linear movement as well as an associated method for displacing a displaceable structural unit relative to a stationary structural unit. A first drive unit drives a shaft, which is in operative connection with a tube, which is connected to the displaceable structural unit. If a predeterminable condition is substantially achieved, a switch is made from the first drive unit to a second drive unit.

Abstract: In a die clamping apparatus for an injection molding machine or the like, die clamping means for coupling and pressing a moving die plate 9 to a fixed die plate via a tie bar 15 has a die clamping cylinder consisting of two stages of a large-diameter cylinder 11 and a small-diameter cylinder 31 and a ram formed into two stages of a large-diameter ram 13 and a small-diameter ram 25. The large-diameter ram 13 is inserted in the large-diameter cylinder 11, and the small-diameter ram 25 is inserted in the small-diameter cylinder 31. The proximal end portion of the tie bar 15 is connected directly to the small-diameter ram 25. Large oil chambers 11c and 11d are provided on both sides of the large-diameter ram 13, and a small oil chamber 11e is provided on the tie bar connection side of the small-diameter ram 25. An oil pressure is supplied appropriately to each of the large oil chambers and the small oil chamber in the die clamping cylinder to appropriately move the tie bar 15.

Abstract: This invention consists of a new cost effective injection molding apparatus for molding with hot melt adhesives and other Polyamide materials. Manufactured from standard tubing components in a double “L” or “C” design, it has fewer moving parts than other molding machines therefore requiring less maintenance. It is specifically designed to not require the use of temperature limiting and maintenance prone heated hoses for transport of melted material or sliding injection nozzles for engagement into mold-set by utilizing a substantially fixed injection nozzle. It incorporates a sell-draining melt reservoir with single-side mounting to allow for heat expansion and has very short material transfer distance from reservoir to mold-set. It can utilize permanent nozzle engagement into the mold-set to simplify molding operation and reduce cost. It incorporates several safety features to protect operators against injuries.

Abstract: A drive for a movable part, such as a mold closure platen, includes two hydraulic cylinder-and-piston units defining first and third pressure chambers in a first of the hydraulic units and defining fourth and fifth pressure chambers in a second of the hydraulic units, and wherein the piston of one of the hydraulic units is a stepped piston defining a second pressure chamber, thereby providing five pressure chambers. An arrangement of valves provides for selective coupling of hydraulic fluid among the pressure chambers whereby pressure medium is forced from one of the hydraulic units, during an advance of its piton, to the other of the hydraulic units.

Abstract: The mold clamp apparatus comprises a toggle mechanism provided with a hollow pressure support body at the link tip. A movable platen is provided oppositely to a fixed platen and is supported by inserting therethrough a tie bar across a link reception platen of the toggle mechanism and the fixed platen of the toggle mechanism. A clamping rod enters and exits a pressure support body at the back center of the movable platen. A quick traverse mechanism of the movable platen is provided. A clamping linkage apparatus is arranged between the movable platen and the toggle mechanism by inserting the tie bar through the installation platen. A linkage plate having a tilting pin of the installation platen inserted therein is attached to the pressure support body together with a casing.

Abstract: In an injection-molding machine, the rapid traversing over long distances takes place with the aid of linear drives (L1, L2), the “rotor” (H1, H2) which is a component part of the machine construction.

Abstract: A pressure-controlling device is used in an injection mold that includes a movable component, a stationary component, and a cavity defined by the movable and stationary components. The pressure-controlling device includes a piezoelectric actuator, a pressure sensor, and a control unit. The piezoelectric actuator is connected to the movable component for actuating the movable component. The pressure sensor is connected to the stationary component, and outputs a signal in response to pressure in the cavity. The control unit is connected electrically to the piezoelectric actuator and the pressure sensor, processes the signal from the pressure sensor, and controls the piezoelectric actuator to move the movable component and to adjust the pressure in the cavity.