摘要:
An apparatus for rapidly and accurately correcting the bottom dead center position of the slide of a mechanical press during the operation of the press. The apparatus includes a hollow cylindrical member, disposed between a slide and a die-height adjusting screw mechanism, that can be expanded or contracted along its axis. Also provided are a bottom dead center position setter, a bottom dead center position detector for detecting a bottom dead center position of the slide, and a force applying unit which supplies a contraction force to the hollow cylindrical member. A correction control unit controls the force applying unit to expand or contract the hollow cylindrical member in order to correct the slide bottom dead center position, so that a detected bottom dead center position coincides with the set bottom dead center position.
摘要:
An apparatus for adjusting bottom-dead-center position of a slide in mechanical press including a connecting rod 4 connected to a crank shaft 3, and a hydraulic cylinder 15 provided between the connecting rod 4 and a slide 5. The hydraulic cylinder 15 has a piston rod 16 having one end connected to the connecting rod 4, a cylinder body 17 capable of moving relative to the piston rod 16, a hydraulic chamber 27 formed below a piston portion 16A, and a pressure adjusting means 45 connected to this hydraulic chamber 27. An extending member 19 for connecting the connecting rod and the cylinder body is fitted around an outer periphery of the piston rod 16, and the adjustment of the bottom-dead-center position of the slide can be effected as the extending member 19 is extended by the adjustment of hydraulic pressure within the hydraulic chamber 27.
摘要:
A screw mechanism is used to change the shut height of a mechanical press. A clearance between thread faces of a female screw and a male screw in this screw mechanism is shifted to one of the thread faces, on which an operating load of the press acts, by pressing the other thread face, which receives the operating load, by the action of a hydraulic force from a hydraulic cylinder mechanism, by which the clearance is always positioned on the side of one thread face. Since the female and male screws cannot rotate relatively and put in a lock state while the thread faces are pressed to one side, the position of a slide does not change even if the press is driven in this state. A hydraulic cylinder for quick die opening is provided separate from a hydraulic cylinder for locking the female and male screws in the shut height adjustment, by which the slide is moved upward or downward. This achieves a quick die opening mechanism used for maintenance and checks of the press which maintains a sufficient and constant upward stroke length of the slide even though the shut height changes.
摘要:
A radiation-sensitive resin composition includes (A) a fluorine-containing compound that includes a group shown by the following formula (1), and (B) a photoacid generator. wherein RC represents a (p+1)-valent aromatic ring group, Q represents a linking group obtained by removing one hydrogen atom from a monovalent hydrophilic group, RE represents a hydrogen atom or a hydrocarbon group having 1 to 10 carbon atoms, p is an integer from 1 to 5, provided that a plurality of Q and a plurality of RE may respectively be either the same or different when p is an integer from 2 to 5, and “*” indicates a bonding hand.
摘要:
A stencil printing apparatus allows printing on coated paper as in ordinary paper (uncoated paper), and can make a contribution to the diversification of printing needs. The stencil printing apparatus comprises a printing apparatus body comprising a printing drum having UV curable ink, and an UV irradiation device connected to a paper output unit of the printing apparatus body. When the paper type is recognized as coated paper on the basis of a signal from paper type input means or the like, control means controls a master-making energy supplied to a thermal head serving as master-making means, to be larger than a master-making energy supplied in the case of uncoated paper. The paper onto which an ink image corresponding to the characteristics of coated paper has been transferred is then fed into the UV irradiation device, where the ink is dried and cured.
摘要:
An image forming apparatus of the present invention includes a stencil printer section and a non-stencil printer section and can form a stencil image and a non-stencil image on a single sheet. A first and a second adjusting section respectively adjusts the position of the stencil image and that of the non-stencil image relative to the sheet in the direction of sheet conveyance and the widthwise direction of the sheet perpendicular to the direction of sheet conveyance. A first shift display section displays an amount of shift of the position adjusted by the first adjusting section. A first moving mechanism shifts the position of the stencil image in accordance with the operation of the first adjusting section. A second shift display section displays an amount of shift of the position adjusted by the second adjusting section. A second moving mechanism shifts the position of the non-stencil image in accordance with the operation of the second adjusting section.
摘要:
A master roll includes a cylindrical core, a long-formed stencil wound around the core, and a ring-like identity member inserted in at least one side of inner periphery of the core. The identity member has a feature according to a variety of the stencil. The feature of the identity member is identified by size of the identity member, inserted position of the identity member or the like, so that many varieties of the master roll can be easily manufactured. A master roll holding apparatus can hold the master roll.
摘要:
A stencil printer includes an ink drum having a hollow cylindrical porous support and a pair of flanges supporting opposite ends of the support. Annular elastic members are respectively affixed between the inner periphery of the porous support and the outer circumferences of the flanges. When the ink drum is pressed against a press roller, the elastic members deform and cause an ink roller disposed in the ink drum to be displaced. As a result, the ink roller contacts the inner periphery of the porous support brought into contact with and positioned by the press roller. The ink roller and the inner periphery of the ink drum can therefore contact each other under uniform pressure without the rigidity of the drum being reduced and without any shaking.
摘要:
A printer for printing an image on a paper paid out by a pick-up roller and separated from the other papers by a separating device includes a kind-of-paper setting device for allowing the operator of the printer to select and input the kind of papers to be used. A controller automatically selects, among transport conditions stored beforehand in correspondence to the kinds of papers, optimal transport conditions matching with the kind of papers input by the operator in response to a signal received from the kind-of-paper setting device. The operator should only select and input the kind of papers while watching an LCD (Liquid Crystal Display) provided on an operation panel. The printer obviates troubles relating to the transport of papers.
摘要:
A corresponding pair of male and female screw members includes alternately disposed rising and falling sloped surfaces on threads of the male and female screw members along a sliding direction of the threads. Depressions and projections are disposed continuously in a direction perpendicular to the sliding direction. One of the depressions or one of the projections resides between each adjacent pair of the sloped surfaces. A lubricating oil is placed between the threads of the male and female screw parts. An incline angle of the sloped surfaces is selected appropriately to increase a wedging action of the sloped surfaces against the lubricating oil film which occurs when the male screw member is rotated with respect to the female screw member.