Abstract: A numerically controlled lathe with a stationary headstock and a work spindle, mounted rotatably in the headstock, for holding a work in a first clamping includes a counter spindle for holding rotatably the workpiece in a second clamping. The lathe also has a tool turret, which can be indexed around an axis and which is mounted on a first slide, movable in two directions that are perpendicular to each other. This first slide also supports the counter spindle. A second tool holder is mounted next to the work spindle. The counter spindle and the tool turret are mounted on the first slide in mutually variable configuration; and the second tool holder is mounted on a second slide, which can be moved at least in a direction perpendicular to the work spindle axis. This second tool holder holds two groups of tools, one of which is mounted and designed for machining the work at the work spindle and the other is mounted and designed for machining the work at the counter spindle.

Abstract: In a clamping unit, particularly in a chuck with exchangeable jaws, one terminal clamping position is reached during opening when the clamping jaws approach the limit of stability. The other end position is reached during closing when the jaws approach the point where they cannot be moved any further. However, both end positions must be so far removed from the rest position or the stop position that a residual clamping stroke remains which insures safe clamping even then in the terminal clamping positions. The terminal clamping positions are different for chucks of varying sizes, and so are the clamping strokes. To adjust the end positions as well as for determining the attainment of these end positions, an apparatus is provided comprising a transmitter device and a sensor device which reacts to approach or contact. Spacing is changeable with the adjustment of the clamping jaws.

Abstract: A workpiece handling apparatus includes a workpiece gripper having gripping elements and capable of both internal and external gripping functions rotatably attached to a support arm of a manipulation system. The workpiece gripper is controlled by an actuator capable of overcoming spring tension which is applied to the gripping elements.

Abstract: An arrangement for automatically changing clamping jaws of the chuck of a machine tool having a turning carriage and a cross-slide rest. A clamping jaw magazine has guides for the clamping jaws stored therein which may be aligned with the clamping jaw guides of the chuck. A transfer device has a transfer element which is displaceable in the direction of the alignment guides, and this transfer element is provided on the cross-slide rest.

Abstract: The invention comprises a tool turret for a turning machine whose operational axis has a wider spacing from the bed of the carriage than the spindle axis of the turning machine. The tool turret has an inner rim with inner turning tools and an outer rim with outer turning tools, the inner and outer turning tools being angularly offset in relation to each other. In order to bring the inner and outer turning tools into operating position during the stepwise further movement of the turret, successive operational angles must be variable. Because of the wider spacing of the operational axis from the bed of the carriage, the turret disc carrying the tools can be made larger with the result that more tools can be provided thereon or the spacing between the tools can be enlarged. The changeover with unequal angles can be accomplished by means of a regulated direct current motor, the operational angle being fed into the regulation circuit as the desired value.

Abstract: A gripping or clamping jaw magazine and a transfer mechanism for transferring sets of jaws of different configuration from the magazine to the chuck and vice versa. The system automatically changes the jaws to accommodate various geometric forms and surfaces of workpieces to be inserted in the chuck for machining.

Abstract: Workpieces of a synthetic plastics material are heated to enable further lding thereof to be effected. Heating is effected by infra-red radiators and, in order to ensure that localized overheating is avoided, the surface of the workpiece which is exposed to radiation is cooled during the heating process.

Abstract: A blow mold structure for the blowing of containers, bottles or the like rein a coolant fluid is circulated through the mold. The blow mold includes a pair of openable and closable mold blocks, each carrying a mold insert. The changeable inserts cooperably define the mold cavity, and coolant fluid is circulated between each insert and the adjacent mold block to cool the cavity-defining inserts. A series of grooves is formed in the exterior surface of the mold insert, the insert is sealed to its mold block and coolant fluid is introduced into and removed from the grooves through supply passages in the mold block. A chamfered abutment at one end of each insert and a mounting flange at the other end insures quick changing of inserts while maintaining structural rigidity during use.

Abstract: Method for manufacturing blanks from a synthetic plastics material includes mould cavity defined between a mandrel and an outer mould. A retractable sleeve is slidably mounted on the mandrel and is displaceable within the cavity at a rate which depends on the rate at which the plastics material is injected into the cavity.

Abstract: An apparatus and method for heating parisons or other thermoplastic compots preparatory to forming the component to a different shape, as by blow molding. The parisons are heated by conveying them past an elongated infra-red radiator in spaced relation to the radiator. A concave reflector is provided for each parison, the reflector being movable with the parison in fixed relation thereto. The parison is located at the focal location of the reflector so that heat from the radiator bypassing the parison is reflected back to the parison.

Abstract: A tubular slug of thermoplastic material is preheated and is then gripped a position spaced from an open end of the slug, the gripping means being such as to effect a reduction in cross-section of the gripped portion of the slug. Such reduction in cross-section provides a shoulder which abuts the gripping means during application of pressure to the end face of the slug to deform the end portion thereof to provide a thread, groove or other profiled formation.

Abstract: Apparatus for manufacturing blanks from a synthetic plastics material inces a mould cavity defined between a mandrel and an outer mould. A retractable sleeve is slidably mounted on the mandrel and is displaceable within the cavity at a rate which depends on the rate at which the plastics material is injected into the cavity.