Abstract: An injection molding machine having four tie bars extending through and between a movable platen and a fixed platen each of which carry a half of a mold. To enable the movable platen to withstand the forces which arise during a molding process, a pressure control mechanism including a piston in association with each tie bar is received within a corresponding recess provided in the movable platen and in order to grip the tie bars during the molding process a gripping mechanism is provided which is supported by the piston such that the gripping mechanism and the piston effectively form a single movable unit. The gripping mechanism comprises a pair of gripping jaws which are transversely movable and are moved by way of a rotatable disc which is also provided in the single movable unit.

Abstract: A clamping apparatus for a tiebarless injection moulding machine is arranged to absorb all of the clamping forces. The machine has a machine frame supporting a fixed platen and a movable platen which carry mould halves. The movable platen is slidable along linear guide rails as is a force transmission member or second movable platen incorporated in a drive for the movable platen. The drive comprises a hydraulic cylinder and piston unit. A clamping structure has two, parallel clamping frames, each of which is substantially U-shaped so that upstanding clamping arms are defined in each clamping frame. Each clamping arm terminates in a respective force transmission part which has a curved surface and which abuts a respective one of the fixed platen and the second movable platen. When a moulding operation is undertaken, the mould halves carried by the fixed and movable platens are brought into clamping contact.

Abstract: A boring device for finishing high precision bores including a cylindrical body and a tool supporting member movable in a direction perpendicular to the longitudinal axis of the cylindrical body and adapted to retain a boring tool or implement. Movement of the tool supporting member is caused upon rotation of a rotatable ring which is mounted for rotation about the longitudinal axis of the cylindrical body, such rotation of the ring acting to move a crossbeam along the longitudinal axis. The crossbeam is fixed to, and similarly moves, an elongate rod and an oblique extension thereof. The oblique extension is slidably engaged at least partially within the tool supporting member. The crossbeam extends substantially perpendicular to the longitudinal axis of the cylindrical body and has at its ends threads in engagement with an internal thread of the rotatable ring. Axial movement of the crossbeam is enabled by its receipt within an axially extending slot of the cylindrical body.

Abstract: A machine tool such as a lathe including a control device for enabling manual operation of carriages which are movable in mutually orthogonal directions. During manual operation, the control device and the longitudinally moving carriage are moved in tandem. The control device may be disengaged from the carriage, e.g., for safety reasons, such that rapid movement of the carriages under the control of an automatic control unit is possible. The control device has rollers disposed in guideways arranged on a stationary support connected to the lathe bed. The stationary support may similarly include guideways for sidably supporting movable covers. A lever selectively engages or disengages the control device and the carriage. Upon engagement of the control device and the carriage, an inductive proximity switch is actuated to prevent rapid traverse of the carriages.

Abstract: Mass compensating device and a rotary head used for machining high precision bores incorporating the mass compensating device, including ring shaped counterweights having balancing masses, an angular displacement system including toothed gears which mesh with internal gears on the counterweights and a rotating external ring arranged in the boring head.

Abstract: A displaceable cutting tool shank holder, in particular for a rotary boring head threadable on a main spindle of a machine tool, having one end with a substantially H-shaped cross section provided with parallel linear tracks cooperating with linear tracks on internal projections in a member connected to the rotary boring head to thereby define guideways in which bearing balls on roller are situated. The projections are arranged on an end portion or top portion of the rotary boring head. An opposite end of the tool shank holder has a recess wherein a cutting tool shank is lodged.

Abstract: The invention relates to an improved micrometric device for finishing bores of the type having a substantially cylindrical body in the interior of which are mounted displacement devices that actuate on a tool holder displaceable in the same direction as the radial component of the work force. The displacement devices are provided with a backlash suppression system and a movement transmission mechanism. The movement transmission mechanism is provided with a graduated drum coaxially mounted to a micrometric screw. The micrometric screw is axially and radially supported in relation to the body of the micrometric device by a support system. In accordance with the invention, on an upper threaded extension of micrometric screw, a cylindrical rod is mounted that incorporates at its upper end, an oblique portion or extension set off by an angle in relation to the longitudinal axis of micrometric screw.

Abstract: The invention relates to an improved micrometric device for finishing high precision bores. The device has a substantially cylindrical body having a displacement system arranged in an interior thereof. The displacement device actuates on a tool holder which is then displaced in the same direction of the radial component of the workforce. The micrometric device is also provided with a backlash suppression system. In accordance with the present invention, the micrometric device has an upper cylindrical body mounted and fixed to a lower cylindrical body, both of which coaxially envelop a graduated drum. The graduated drum, in turn, is coaxially mounted and connected to a micrometric screw arranged longitudinally in the interior of the micrometric device. In the interior of the micrometric device, and connected to an upper extension of the micrometric screw, a conversion mechanism is arranged which changes a rotating movement of the micrometric screw into a linear movement of a movable crossbeam.

Abstract: A hydromechanic mold clamping mechanism for injection molding machines including a movable mold carrying plate provided with hydraulic cylinder rods linked to a fixed mold carrying plate. In accordance with the invention, movable carrying plate (2) receives four sets of hydromechanic mechanisms (6) independently mounted on said movable carrying plate (2) through set of support rods (12 and 13) fixed to said movable plate (2), supporting hydromechanic sets (6) respectively.

Abstract: An ultra-precision sub-micron boring tool and pre-setting system for finishing through bores or blind bores is disclosed. The system includes a cylindrical cartridge having an internal hollow portion, a first through bore located in the hollow portion, and a toothed segment lodged in the first through bore. The toothed segment and a micrometric screw, which passes through an axial bore in the toothed segment, are arranged on a common geometric axis. A bushing having an internal thread is located in the interior of the axial bore so that the micrometric screw engages with the internal thread. The system also includes a hollow stud which lodges and retains the bushing, a set of rings which carry and envelope the micrometric screw so that the micrometric screw is supported by the set of rings in relation to the cylindrical cartridge, a locknut, a graduated dial attached to an end of the micrometric screw through the locknut, and a second through bore located in the cylindrical cartridge.

Abstract: A process for copying and threading in automatic square cycle, applicable to and/or incorporated into engine lathes in general, includes material removing machining of parts by copying method in automatic square cycle, providing during the machining an automatic feed system for depth of cut with programmable and progressive increments through electric means, cutting of threads on a surface of the machined parts in automatic square cycle, and providing during the cutting an automatic feed system for depth of cut with programmable and progressive increments through electric means.

Abstract: Hydraulic actuator for the operation of clutch discs, consisting of a housing having a hole therein, a hydraulic cylinder having a centrally oriented hole therethrough, the hydraulic cylinder being mounted at its one end to the hole in the housing, and at its other end defining a ring shaped chamber having a u-shaped cross section, a shaft rotatably mounted in the centrally oriented hole of the hydraulic cylinder for supporting the clutch discs, a ring shaped actuator rotatably and slidably mounted in the chamber of the hydraulic cylinder for engaging the clutch discs, and means for selectively actuating the ring shaped actuator so that the clutch discs can be selectively engaged and disengaged.

Abstract: An injection molding machine including articulating components including a movable cross arm, a set of actuator components for moving the movable cross arm, a central rod having an end and guiding the movable cross arm, a support plate attached to the end of the central rod, extraction components including exclusive guideways and a part extracting plate resting and slidable on the exclusive guideways, and another set of actuator components supported by the support plate which also supports the extraction components.

Abstract: A turning machine or more precisely a numerically controlled lathe consisting of bed and column or base having said bed a cross section of substantially trapezoidal shape having in its upper part parallel prismatic guideways arranged in accordance with two inclined planes for supporting and/or sliding of the headstock, tailstock and carriages with indexable toolholder, said inclined planes intersecting above said bed, and said parallel prismatic guideways which permit free movements between the carriages mounted on separate guideways and free movements between one of the carriages and tailstock which are mounted on separate guideways, without interference between all of them along the whole useful length of said separate parallel prismatic guideways.

Abstract: An automatic uncoupling device for opening half-nuts for cutting threads, which half-nuts are provided on engine lathes or any other machine tools, is installed on the body of the apron of the lathe. The device includes a control lever mounted on a shaft operatively connected to the half-nuts and a disc provided with a radially extended arm. A hollow cartridge mounted in the apron has a pin slidably inserted therein. One end of the pin is in constant contact with the arm of the disc. The device further includes a trigger arranged in contact with the opposite end of the pin. A cylindrical member with the limiting pins is shiftably mounted in the apron and adapted, upon its shiftable movement, to actuate the trigger through an elongated element.