摘要:
A method and device are provided to prepare a cutting tool such as used for die cutting sheet material, by mounting the cutting members in a mounting support with the method and device controlling the operational stages of the preparation. The device includes improvements in the press which are that a plurality of individual pressure elements are arranged on a support surface of a lower bed in rows and columns to form a rectangular configuration with each of the elements being individually controlled so that different groups of elements can be actuated to act on a pressing plate depending on the size of the cutting tool being prepared. To insure an accurate and equal pressure, the elements in each corner are actuated with a low pressure to bring the pressing plate and the tool being acted on into contact with the pressure surface of the upper bed and then high pressure is applied to the selected pressure element to insure the securing of the cuttings blades and members into a support of the cutting tool.
摘要:
A device for controlling delivery of sheets from a stack includes a lift for a stack of sheets. A sheet inserter removes sheets from the top of the stack to move them. A detector detects the front top level of the stack and measures the extent of variations in the level of the stack. A computer receives a measurement from the detector and acts on a first electric motor for the lift to raise the stack. A source of information connected to the computer relates to the supply frequency in real time and to the nominal thickness of the sheets. The computer output is connecting to a sheet supply frequency varying device for controlling the first motor to the lift. The computer is programmed so that the signal at its output is characteristic of the difference between the measured level of the stack and the calculated level thereof. An auxiliary supply device may support and raise the stack, based on the computer program, independently of the lift.
摘要:
The braking device comprises at least one flexible braking means (1) extending across the trajectory of the sheets (2) and mounted so as to pivot around a transverse axis (4) so that its trajectory around the axis intersects the trajectory of the sheets (2), the direction of rotation of the end of the flexible braking means (1) and intersecting the trajectory of the sheets (2) being opposite the direction of motion of the sheets, and also comprises drive means for pivoting the braking means (1) in dependence on the longitudinal dimensions of the sheets (2) and the frequency with which they pass. The means driving the braking means (1) around the transverse axis (4) comprise a variable-speed electromagnetic actuator (5) connected to control means which in real time record the parameters relating to the longitudinal dimension of the sheets and the frequency with which they pass.
摘要:
An arrangement for transporting metallized belts or bands in a machine for transferring the metallized images from the belts or bands onto a sheet comprises a support for the belt supply bobbins, advance rollers for intermittent unrolling and advancing the belts, guide rollers for guiding the belts between the platens and then a discharge state around one of the platens of the press, a tension roller for placing the belts under tension and an arrangement for removing the worn belts from the machine. The advance rollers are arranged in a parallel group downstream from the platen press and slightly above a plane of transport for the sheets through the press. The machine includes at least one window provided in at least one of the lateral walls of the frame of the machine above this group of advance rollers so that an operator may easily obtain access to the rollers for replacement of the bands and/or adjusting the position of the bands.
摘要:
Method and apparatus for placing plate-like elements (10) within a processing machine (1): the machine including a feeder (20) for placing the elements (10) in a plurality of gripping members (31) of a conveyor (30) in successive stations (3, 4, 5). The feeder (20) has a fixing device (21) for elements. The feeder (20) is driven by a computation and control unit (40). The method includes successive steps during advancement of each plate-like element (10) of measuring the longitudinal and angular placement error of the plate-like element (10) relative to a theoretical position, by detecting its front or rear edge, controlling the feeder (20) according to the measured placement errors, activating the fixing device (21) to attach the plate-like element (10) to the feeder (20), then measuring the longitudinal, the transverse and angular placement error of the plate-like element (10) attached to the feeder (20), relative to a theoretical position, by detecting register marks (12) printed on the element (10).
摘要:
The planar member for a stripping station in a machine for cutting sheet elements consists of a board which may be provided with openings if it is a stripping template, or if it is one of the upper or lower stripping boards is provided with working parts, on one surface and on an opposite surface is provided adjacent a downstream edge with a centering post and at least two mounting strips, an upstream edge of the member is provided with one or more mounting strips which strips protrude from the edges of the board and one of the sides of the board is provided with grasping handles. The planar member is mounted in a frame which has means for engaging the centering post and the mounting strips adjacent the downstream end so that the planar member is not subjected to warping. In addition, the planar member may be received in a table which has an arrangement for engaging the mounting strips to position the board so that a second stripping member such as the lower stripping member can be mounted above the planar member to enable positioning the stripping pins relative to the working parts of the planar member.
摘要:
A single-face station for a machine that produces corrugated cardboard comprises a frame which includes a stand with two lateral wall members, a lower cassette which carries a lower pressure roll being positioned on support and resting surfaces formed in the lateral walls, an upper cassette having a pair of corrugating rolls resting on the lower cassette and on guide surfaces in each of the side walls. The resting surface and support surface extend at right angles to each other and obliquely to a horizontal plane and the arrangement includes a holding arrangement to exert a downward force on anchoring points provided in a lower rear portion of the upper cassette in order to hold the upper cassette and lower cassette on their respective resting, supporting and guiding surfaces. In addition, there is an extracting arrangement for allowing the upper cassette to be withdrawn laterally from the frame.
摘要:
Method and apparatus for placing plate-like elements (10) within a processing machine (1): the machine including a feeder (20) for placing the elements (10) in a plurality of gripping members (31) of a conveyor (30) in successive stations (3, 4, 5). The feeder (20) has a fixing device (21) for elements. The feeder (20) is driven by a computation and control unit (40). The method includes successive steps during advancement of each plate-like element (10) of measuring the longitudinal and angular placement error of the plate-like element (10) relative to a theoretical position, by detecting its front or rear edge, controlling the feeder (20) according to the measured placement errors, activating the fixing device (21) to attach the plate-like element (10) to the feeder (20), then measuring the longitudinal, the transverse and angular placement error of the plate-like element (10) attached to the feeder (20), relative to a theoretical position, by detecting register marks (12) printed on the element (10).
摘要:
A method for curvilinearly converting of web or sheet material by compression of the material between an upper table and a lower table. The tables are each connected to a respective supporting structure and operate conjointly on either side of the plane of travel of the material along a longitudinal axis. During the compression phase, there is a phase of essentially unidirectional intentional elastic deformation of a structure of one of the tables. The deformation increases and then decreases as the curvilinear surface of one table rolls past the other table, for providing generally more uniform compression as the surface rolls. An apparatus for the compression includes the structure described.
摘要:
A sheet-processing machine operating in cycles, inter alia a shaping press, during which a cyclic excess air pressure is produced in a covered part of the machine, where the covered part has an opening (6) on the perimeter of which a diaphragm is fixed, the diaphragm being made of an elastic material which is substantially impermeable and resistant to the oil lubricating the machine (9). The diaphragm can be a fabric (3) substantially permeable to air and stretched on a frame (2) surrounding the opening (6).