Abstract: A load bearing panel member having a first portion, a second portion, and an appearance surface portion is formed by injection molding such that the first portion includes a plurality of rib members forming a grid pattern on the first portion and another plurality of rib members extending toward the periphery of the first portion which may be non-orthogonal to each other and to the rib members forming the grid pattern. A tubular cavity may be formed within each of the non-orthogonal rib members by injecting a gas into the rib member during the molding process forming the panel. An appearance surface portion attached to the first portion and second portion of the panel member forms an integral hinge between the first and second portions of the panel member. The panel member may be configured as a floor panel of a vehicle.

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 method of making a spool seal having a smooth sealing surface is provided which utilizes a mold including separable first and second mold halves which join when closed to form a parting line which is positioned away from the area of the mold which forms the inner and outer diameter surfaces of the spool seal. A moldable material is introduced into the cavity defined by the closed mold halves and cured such that the resulting inner and outer diameter surfaces of the molded spool seal are free of parting lines.

Abstract: A molding system for provided which is configured for molding a substrate comprising a plurality of individual carriers each of which is pre-cut into a shape of a memory card device and connected to a frame of the substrate by narrow tie bars. A molding plate is configured to receive the substrate, and a cavity plate configured to be clamped to the molding plate further comprises a plurality of molding cavities each constructed in the shape of the said carriers. The cavities are operative to create molded packages onto the carrier conforming to a shape of the memory card device without need for further forming of the molded compound after molding. Additionally, a nozzle on the surface of each cavity is operative to introduce molding material into the cavity in a direction that is substantially perpendicular to a plane of the substrate placed on the molding plate.

Abstract: An energy efficient drive system is provided for use on typical injection molding machines whereby a single electric motor drives both the extruder screw and a hydraulic motor that continuously charges a hydraulic accumulator during the extrusion process. During the injection cycle, the charge in the accumulator is directed to stroke the extruder screw and inject melt into the mold cavities. Another embodiment utilizes a similar arrangement on the clamp mechanism of the injection molding machine whereby the charge in the accumulator is directed to hold the mold closed during the injection cycle.

Abstract: The present invention provides a hydraulic actuating mechanism of an injection molding machine, in which a plurality of hydraulic actuators are driven by one hydraulic pump, wherein the hydraulic pump of the hydraulic actuating mechanism is a variable discharge pump having the maximum necessary delivery capacity at least for each of the hydraulic actuators at the time of the highest rotational speed of the pump; the discharged fluid pressure is controlled by a discharge cutoff function of a pressure compensator ancillary to the variable discharge pump; and the pump is driven by a motor whose rotation can be controlled in a stepless mode.

Abstract: A method of moulding a plastics material in a mould cavity is described which relies primarily on movement of a part of the mould to provide the pressure necessary to force the plastics material melt to fill all the parts of the mould cavity.

Abstract: An injection molding apparatus includes a vessel, mold, pusher, and thrust providing section. The vessel stores a molding material and has a nozzle hole which is formed in the bottom portion to inject the molding material and a first seal surface formed around the nozzle hole. The mold is made up of stacked members stacked on the lower side of the vessel and is filled with the molding material injected from the vessel. The mold has a sprue communicating with the nozzle hole and a second seal surface formed around the sprue. The stacked members respectively have third seal surfaces at portions where the members are in contact with each other. The pusher pressurizes the molding material in the vessel. The thrust providing section provides a thrust to the pusher to pressurize one of the pusher and the mold through the molding material in the vessel.

Abstract: The present invention provides a hydraulic actuating mechanism of an injection molding machine, in which a plurality of hydraulic actuators are driven by one hydraulic pump, wherein the hydraulic pump of the hydraulic actuating mechanism is a variable discharge pump having the maximum necessary delivery capacity at least for each of the hydraulic actuators at the time of the highest rotational speed of the pump; the discharged fluid pressure is controlled by a discharge cutoff function of a pressure compensator ancillary to the variable discharge pump; and the pump is driven by a motor whose rotation can be controlled in a stepless mode.

Abstract: A multifunctional assembly for use in various plastic forming processes includes a housing conformed for selective partition to receive an incandescent light assembly as a source of heat and selectively positioned pneumatic cylinders for compressing heated plastic into forms and extrusion dies. An air pump selectively connected by manifolds may then be used for generating vacuum and pneumatic pressure both for the forming processes and for the pneumatic cylinders.

Abstract: In the present invention, an inner space of a clamping cylinder is divided into a front oil chamber and a rear oil chamber for liquid pressure by a piston section of a clamping ram, the front oil chamber and the rear oil chamber are connected with each other by a connecting path which is bored in the piston section of the clamping ram, and the front oil chamber is connected to a charge tank via a second open-close valve. In the clamping ram, an oil chamber for mold closure and an oil chamber for mold opening are formed by slidably fitting a high speed piston therein. A first open-close valve, which opens or closes the connecting path of the piston section of the clamping ram, is slidably fitted on the rear end section of the clamping ram. An oil chamber for valve opening, which is formed between the first open-close valve and the outer face of the clamping ram, is connected to the oil chamber for mold opening via a through-hole bored in the clamping ram.

Abstract: An injection molding machine for small-sized articles of thermoplastic synthetic resin comprises a hydraulically pressurizable injection head cylinder operable on an injection cylinder of an injection unit for injecting molding material into a mold, a hydraulically pressurizable clamping cylinder operable on one of a pair of mold members of the mold for opening and closing the mold, and a booster operatively connected to both the injection head cylinder and the clamping cylinder for converting pneumatic pressure into high hydraulic pressure to actuate the two cylinders in timed relation to each other.

Abstract: In a machine for the continuous and automatic production of a succession of small components from synthetic plastics material by injection moulding, the mould and injection unit are operatively connected to a common actuating device through two separate transmission mechanisms which both include an element reciprocable along the longitudinal axis of the machine and are so interconnected that the injection unit cannot operate until the mould has been closed.

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.