Abstract: An injection molding machine having a plurality of axially arranged mold stations including structure for supporting sets of mold plates and a mechanism for opening, closing and overstroking mold plates.

Abstract: An injection molding machine where the movable mold platen 3 and the fixed mold platen 2a are arranged separately of the drive unit 20. The drive unit 20 is located behind the injection unit 1 and connected by pins 9 to the mold section. This arrangement offers the advantage of a cantilevered mold section, which enables maximum accessibility to the major working area.

Abstract: In an injection molding machine for processing synthetic materials. The stationary mold carrier and the movable mold carrier are in connection by levers arranged transversally with respect to the closing direction. Mentioned levers at turn are arranged in different distances from the injection axis. The connecting spars and the levers constitute a framing, at which at least one closing device for closing the mold and for applying the closing forces is supported.

Abstract: The method and apparatus for producing large injection molded products and producing high tonnage injection molding apparatus utilizing tie rods interposed between the mold part supporting platens, the tie rods being removed from proximity to the mold parts upon the mold parts being opened to facilitate removal of large parts from the mold, and to facilitate mold part setup and installation. The tie rods are axially displaceable with respect to both mold part supporting platens and selectively locked and released from the platens during each molding cycle.

Abstract: An apparatus for opening and closing a mold is described herein, wherein a movable mold is revolved and pivotally moved in association with a mold opening and closing operation. When opened, the mold is maintained in a sideways position such that the mold surface faces outwardly. In this manner, the molded article recovery operation is simplified, and monitoring of the mold surface by an industrial television set (ITV) is facilitated. In the mold opening operation, the movable mold begins at a position opposed to a fixed mold. As the mold is opened, a pinion is rotatively driven by a rack which is moved downward in association with the mold opening operation. In this manner, a rotatable block is revolved and pivotally moved along with the movable mold to a position so that the movable mold and the molded article are pointed outwardly. Ejection pins may then be used to eject the molded article off the mold.

Abstract: A mold closing unit for use in an injection molding machine for processing plastic materials for removal of moldings is provided with a device for actuating at least two first identical parts of an injection mold, which are transferred alternately into the space between the mold carriers of the mold closing unit on a guideway that runs transversally with respect to the closing direction for creation of an injection mold.

Abstract: A horizontal injection and compression molding apparatus has an injection device (3) and a compression molding device, wherein the compression molding device (2) includes: a stationary die plate (12) for holding a stationary die (11), a movable die plate (22) for holding a movable die (21), means (30) for rapidly extending and retracting the movable die plate (22), relative to the stationary die plate (12), means (40) for locking the movable die plate (22) to tie bars (51) at a position where the movable die plate (22) approaches the stationary die plate (12), and means (50) for fastening the dies after the movable die plate (22) is locked to the tie bars (51); and wherein the injection device (3) for feeding a molten plastic material into a mold cavity (90) between the stationary die (11) and the movable die (21) is characterized in that it initiates feeding of the molten plastic material into the mold cavity ( 90) when the stationary die (11) and the movable die (21) are parted from each other by a predeter

Abstract: A positioning correction method for a motor-operated injection molding machine, intended to eliminate waste of power supply to or overheat of servomotors by locking up in an ideal state the motor-operated injection molding machine, which uses a toggle mechanism or crank for mold clamping and other operations. During the lockup period, a load RA acting on a mold clamping servomotor 7 is detected (S8), and a position command value PM for the servomotor 7 is increased or decreased in the next cycle in a direction such that the value of the load RA is reduced, if the value of the load RA is greater than a preset reference value V0 (S12, S13). As a result, a rotation center Q1 of a crank 2 and two opposite ends Q2 of a link 3 are locked up in a straight line, so that a moment of rotation produced by a mold clamping reaction force is removed from the rotation center Q1 of the crank 2.

Abstract: In an injection press having a mold in the form of a moveable die positioned on a moveable plate and a fixed die positioned on a fixed plate, the moveable die is moved to a compression starting position which is spaced slightly from the fixed die, the resin to be molded is injected into the mold cavity between the two dies, and the moveable die is then moved towards the fixed die to compress the thus injected resin. The compression starting position is determined by mechanical positioning means which can adjust the compression starting position. The stroke deviation for the compression can be adjusted by detecting the position of the moveable plate during the compression stroke so that the levelness of the moveable die can always be maintained during the compression stroke. Thus, the parallelism of the two dies can be stably maintained against the injection pressure.

Abstract: A device for closing molds of an injection molding machine for plastic which includes a stationary end plate and a mold clamping plate displaceable on traverses. The stationary end plate is connected to the clamping plate by a toggle mechanism having a double toggle lever. The double toggle lever is actuatable by at least two drive units arranged between the end plate and the mold clamping plate, parallel to a main axis of the machine.

Abstract: A movable platen structure for an injection molding machine in which the platen is in the form of a box-like structure that includes spaced front and rear plates. The platen structure includes a plurality of longitudinally extending beam members that interconnect the front and rear plates and are positioned in parallel relationship and in a generally rectangular array. The rear plate includes on its rear face a plurality of vertically extending pillow block members for pivotally carrying a pivot pin, the pillow block members having inclined sides that intersect with the rear face of the rear plate. Extending across the front face of the rear plate and opposite from the ends of the respective pillow blocks are an upper and a lower transverse beam member, each of which is formed integrally with the rear plate to provide additional structural stiffening and thereby permit the rear plate to be of a thinner and lighter structure.

Abstract: One aspect of the invention is a mechanism for controlling the movements of the plates in a multiple plate mold. The mold is secured to a press in an injection molding system having a support plate and top clamp plate. The mechanism includes a member pivotally mounted to the outside of the mold and an arm attaching the press support plate to the member. In a preferred embodiment, two guides are attached to the press top clamp plate and middle moving plate of a three plate mold. The guides travel in curved channels formed in the member to determine the relative positions of the plates.

Abstract: A crank mold clamping apparatus capable of variably adjusting a mold-opening stroke for permitting usage of various types of molds which includes a numerical control apparatus for controlling a servomotor for driving a crank plate connected to a movable platen in forward and reverse rotation within a limited rotation region. The numerical control apparatus calculates a rotation angle between rotational positions of the crank plate corresponding to mold clamping and mold-opening end positions of the movable plate, respectively, so that the crank plate is rotated for the calculated rotation angle in the direction of mold-opening or mold-closing to perform mold-opening or mold-closing when a mold-opening stroke, determined in accordance with the size of a mold to be used, is supplied.

Abstract: A mold clamping apparatus is provided, including upper and lower toggle sections disposed symmetrically with respect to an axis of the apparatus, each toggle section including a ball screw disposed radially outwardly of the apparatus with respect to the axis, a head threadedly engaged therewith, and links operable to expand and bend with reciprocal head motion along the ball screw, each ball screw being directly coupled to a corresponding one of two servomotors connected to a control circuit section including a pulse width modulation control circuit and two transistor inverters. The mold clamping apparatus has primarily structural components separated from the axis so that flexure of the toggle mechanisms and resultant non-uniformity of a pressing force onto the movable platen are eliminated, and each servomotor is small enough to drive a corresponding one toggle section, so that the resultant mold clamp apparatus is low in cost and high in operational response.

Abstract: A rotary blow molding machine includes a plurality of mold stations on a rotary carousel. Each mold station includes an elongated support body, such as multiple tie rods, with a first of the mold sections relatively movably disposed on the support body and a second of the mold sections affixed on the support body for movement therewith. An actuator is connected between the first mold section and the support body to move the support body and the second mold section. A synchronizer linkage is connected between the first mold section and the support body to effect concurrent movement of the first mold section in an opposite direction and equal amount to movement of the second mold section.

Abstract: A press, especially for the manufacture of die-formed parts of dimensional accuracy made of powdered materials is described, which can be equipped and used interchangeably either for the use of the so-called smoothing process or the so-called plunger process. It includes a press support 103 on which a fixed press bed 104 and a vertically slidable press frame 105 are mountred for movement relative to each other by a mechanical drive, preferably a toggle linkage 106, to form a main press ram. Further, it has a bottom ram passing upwardly through the press bed 104 which serves as a smoothing ram or a plunger ram, being operated for both purposes by a double-arm lever 123 pivoted on the press support and actuated by a rock lever 133 likewise pivoted on the press support 103 and having a sliding pivoting connection to the double-arm lever 123.

Abstract: An extrusion tool includes an end plate, a plate holder cassette seating the end plate and having opposite first and second faces; an extrusion head seating the cassette, and a first clamping device having an operative position for pressing the cassette and the end plate as a unit against the extrusion head by engaging an outer face of the end plate. The first clamping device further has a withdrawn position in which it permits a removal of the end plate from the cassette and a removal of the cassette from the extrusion head. There is a further provided a second clamping device for pressing, in a clamping position thereof, the cassette against the extrusion head by engaging a front face of the cassette externally of the end plate, whereby the end plate is, in the withdrawn position of the first clamping device, removable from the cassette while the cassette remains pressed against the extrusion head by the second clamping device.

Abstract: A rotary blow molding machine includes a base, a turntable on the base rotatable about a vertical axis and a number of mold units spaced around the turntable. Each mold unit includes a pair of mold halves which close on and capture a growing vertical parison at an extrusion station and then fall away from the parison as the parison is severed. The captured parison is blow molded and cooled as the blow unit is rotated around the turntable. The finished article, commonly a bottle, is ejected from between the mold halves before the mold halves return to the extrusion station.

Abstract: In a toggle-type mold-clamping apparatus including at least a pair of swingable arms and toggle pins for connecting the arms in a swingable manner through toggle bushings each of which is constructed of a cylinder element and pellets embedded in a peripheral surface of the cylinder element at intervals of a certain distance so as to be exposed to an inner peripheral surface of the cylinder element, while a lubricant film of a grease mixed with fine particles of solid lubricant is applied to sliding surfaces of the toggle pins and the toggle bushings, resulting in excellent lubrication being realized in the apparatus.

Abstract: The invention relates to a collapsible core for a mould. The core comprises three relatively movable assemblies. The first assembly carries a cone, the second assembly carries an inner set of segments which form part of the core surface and engage the cone and the third assembly carries outer segments moved by inclined pins on the second assembly. As the assemblies are moved together the outer segments move radially outwards and the inner segments move axially in between them. Then the inner segments move radially outwards and the cone fills the center of the core. On reversal of the movement, the core is collapsed to enable it to be withdrawn from the moulded article.

Abstract: A press for holding mold segments that are joined to form a mold cavity into which liquid chemicals are injected and reacted to form solid objects includes tie bar extenders to provide field adjustment of the press geometry and further includes booking plate spacers to unload booking plate hinge pins during mold clamping.

Abstract: Described is a drive for injection mould parts of a synthetic plastics injection moulding apparatus for injecting a wall part on a paper web, with at least one supply injector fixed on a carrier, a plurality of injector heads rigidly connected thereto and with driven connecting levers.

Abstract: In order to mold a plurality of articles (20--20) which are disposed in a line, a molding arrangement in an apparatus (60) includes a plurality of cavities (109--109) which are spaced equidistantly from an infeed sprue (131). A primary network of a distribution system (50) through which an injection molding material is flowed from the infeed sprue to cavity gates (151--151) is disposed substantially along a vertical plane (150). Afterwards the injection molding material which has been flowed from the primary network and along a secondary network into the cavities is solidified. Then the primary network is exposed by causing wedge blocks (79--79) to be disengaged from each other and from an adjacent stationary platen (62) and cavity plate (90) by movement of each block in a direction transverse to the plane.

Abstract: Improvements in differential pressure, thermoforming machinery for molding articles in thermoplastic material wherein a mold station incorporates female mold mechanism and opposed mold mechanism, a web advancing mechanism indexes a plastic web in which products are to be formed between said mold mechanisms, a drive moves the female and opposed mold mechanisms between open and closed positions on opposite sides of the plastic web, severing knife means is cooperable with a final increment of said relative movement to dispose said mechanism in closed position to sever the products formed from the web, and ejector mechanism is operable after severing is accomplished and there has been relative movement of said mold mechanisms toward open position to eject the product.

Abstract: A press for molding plastic materials wherein a stationary head and a movable head, arranged for receiving the two parts of a mold, are mounted on a base in which is installed a horizontal longitudinal member having pivoted at its ends vertical rocker levers. The upper ends of the rocker levers are connected to the stationary head and to the movable head respectively, and the lower ends thereof are connected to the ends of a hydraulic piston-cylinder assembly, which, thereby, applies to the heads a clamping force adequate to join the parts of the mold during the molding operation, without loading the base of the machine.

Abstract: A thermoforming machine having opposed mold platens includes a linkage system driven in cyclic movement by a single rotary cam to cyclically shift the platens between their open and closed position. The cam is driven by a variable speed motor which is controlled in a manner such that the rotary speed of the cam during different portions of a cam revolution may be set to a speed which is different than the rotary speed of the cam during other portions of each revolution. By adjusting the speed differential or by adjusting the angular extent of that portion of a revolution of the cam over which the different speed is maintained the time duration of any chosen portion of the cycle may be adjusted independently of the time duration of other portions of the cycle. The platens are mounted for reciprocatory movement upon a three-post frame.

Abstract: A stamping press, as for stamping molded articles out of a plastic web wherein the articles are premolded, has a fixed stamping tool section accurately secured on the press frame and a movable tool section slidably mounted on fixed columns on the fixed tool section and connected by operating linkage to power driven devices on the frame, the linkage including adjustments for tool alignment, stroke and frequency. Push rods in the linkage transmit movement to the movable tool section from cam controlled rocker arms, and the push rods are removably hinged to the movable tool section to disconnect and remove the latter. Secondary devices such as ejectors and further tools are actuated in synchronism with the stamping tool.