Abstract: A die member in an ejector die assembly is movable obliquely with respect to the axis of movement of the ejector die assembly. Backup plate means is connected to the ejector die assembly by a lost motion connection. The backup plate means locks the die member by direct engagement with the die member in the machine closed position and is moved away from the ejector die assembly in the machine open position to permit withdrawal of the die member from the die cavity.

Abstract: Clamping mechanism for a mold having hingedly connected upper and lower mold members comprises an elongated handle pivoted at one end to the upper mold member to have its opposite end swing from a clamping position in which the handle overlies the upper mold member, to and beyond an upwardly projecting intermediate position. Overlying the pivoted end portion of the handle when the mold is closed is a reaction member having a downwardly facing camming reaction surface and an upwardly facing fulcrum reaction surface. An eccentric cam element on the pivoted end portion of the handle engages the camming reaction surface to clamp the mold shut as the handle is swung towards its clamping position.

Abstract: An apparatus for molding shaped bodies from foamable plastics such as foamable polyurethane resin material comprises a two-piece mold 20, 21 fastened to two clamping plates 17, 18 of a mold holder 11, all of which can revolve around parallel axes 34, 35, 36. The upper plate 18 can move toward the fixed lower plate 17 and back again. The plates are locked and urged together during the molding process by pairs of hydraulic cylinders 28, 29 and 30, 31 mounted on opposite sides of the mold halves 20, 21.

Abstract: A machine for automatically forging and thermoforming of hollow thermoplastic biaxially oriented articles has a carrier assembly to carry, lock and unlock forging dies, indexing means to move the carrier assembly and dies past a series of work stations, and an article unloading means. Three work stations are in the automatic machine: forging where the die parts are locked together and the workpiece is forged into engagement with the die; thermoforming to which the die with the workpiece (now called a preform) gripped therein is moved into register with thermoforming mold means; and article ejecting means which include mechanical means for unlocking the die and removing the hollow article therefrom. The carrier assembly is so supported that the strains of forging and thermoforming are taken up by frame tie rods rather than the die mounting means.

Abstract: A tool carrier mechanism for injection molding machines for securing a tool part to a tool carrier, comprises a guide bolt having means for connecting it to the tool part so that it projects outwardly from the rear of the tool part. A tool carrier has a bore therethrough for receiving the guide bolt and has a front face against which the rear of the tool part is engageable and has an opposite rear face beyond which said guide bolt projects. A slide mounted on the tool carrier adjacent the rear face of the tool carrier is movable toward and away from the guide bolt for engagement and disengagement therefrom. Wedge surfaces are defined between the guide bolt and said slide effecting an inward movement of the guide bolt with the tool part to exert an inward pressure engagement of the tool part with the tool carrier.

Abstract: In a molding press having short-stroke high-power mold-clamping hydraulic rams (9) disposed around the free end of each of its guiding columns (3), the cylinder (21) of each of these rams is fixed to a platen (7) which is movable with respect to the columns (3), while its tubular piston rod (16) through which the corresponding column extends has at its free end a locking device (11) including semi-circular keys 12 which may be selectively engaged into one of a number of successive circular grooves (3b) formed in the column to lock rod (16) therewith. A second locking device (132) of quite similar construction is provided between cylinder (21) and platen (7) to selectively lock the latter with the column, the keys (112) of this second device cooperating with the same series of grooves (3b) as the first one.

Abstract: A compact die closing unit for injection molding machines with four pull-type hydraulic linear actuators and an oversize multi-plate injection molding whose stationary die plates engage the piston rods with centering bores, thereby extending the piston rod support in the die separation plane, and whose movable die plates similarly engage the piston rods with centering bores, so as to be carried by the piston rods directly, without the need for a movable die carrier plate and a stationary cantilever frame supporting the latter. The hydraulic supply lines for the power piston bypass control valve are arranged in the auxiliary cylinders.

Abstract: A process and machine are described for the continuous production of reinforced concrete blocks in which a reinforcement member is cut and formed, positioned in an area of a molding station, a divided mold cavity is then defined about the reinforcement member and a paired block formed about the reinforcement member by introduction into the molding cavity of a hot slurry of cement fluid. The paired block thus formed is advanced on a pallet about circular conveyor means, passing through a curing area and ejection station where the cured block is removed from the pallet and the pallet returned to the molding station.

Abstract: An injection molding machine in which a support on a base carries oppositely facing stationary mold portions which, when joined by movable mold portions, form a pair of mold cavities, one of which can be injected with a moldable material having a long solidification time, while the other contains a previously injected article which is solidifying and can be released as soon as the injection of the first cavity is completed. One of the movable mold portions is connected to a movable plate in a fixed spaced relationship, with a wedge-type locking mechanism between the plate and the other movable mold portion for the locking of both mold cavities simultaneously with a single locking mechanism.

Abstract: A tie rod structure for a die closing unit of an injection molding machine in which several parallel tie rods hold together a stationary die carrier plate and a stationary head plate, for example, and where the tie rods are seated in attachment bores of the connected plates whose diameter is the same as that of the tie rod guide portion, a threaded tie rod portion on the outside of the plate carrying a threaded abutment collar which is clamped against the plate by a clamping member engaging the extremity of the tie rod. The clamping member may be rotatable out of the way of the tie rod, in order to permit retraction of the latter.

Abstract: Two halves of a split mold of an injection molding machine are respectively mounted on a stationary plate and a movable plate guided on guide rods projecting from the stationary plate for movement toward and away from the latter. A guide plate, likewise guided on said guide rods, is connected to the movable plate for movement therewith, and a moving arrangement is connected to the guide plate for moving the same and the movable plate connected thereto toward and away from the stationary plate to thus move the mold halves between an open and a closed position. The guide plate includes a clamping arrangement for clamping the guide plate in fixed position on the guide rods and a hydraulically operated arrangement for holding the mold halves in closed position against the force of molding material injected under pressure into complementary cavities in the mold halves.