Provided are a mold producing apparatus and a mold producing method that allow for a reduction in driving force required to raise a squeeze table, and thus significantly save energy. This mold producing apparatus produces a mold by compressing molding sand in a flask. The mold producing apparatus comprises: a pressurization execution unit that makes contact with the molding sand; a squeeze table that is opposed to the pressurization execution unit and on which a carrier plate having the flask placed thereon is mounted; and a pressurization drive device that is provided above the pressurization execution unit and compresses the molding sand in the flask by moving the pressurization execution unit toward the squeeze table. The squeeze table includes: a squeeze table lifting device that raises the squeeze table from a standby position to a compression start position located upward of the standby position; and a lowering restriction device that restricts the squeeze table raised to the compression start position from lowering against the pressure exerted by the pressurization drive device during the compression.
Provided is a simple and inexpensive model exchange device in which the cost of model exchange equipment is reduced. This invention is provided with: a switching device provided between a loading/unloading position at which carrier plates, respectively provided with a pattern molding board, are loaded and unloaded, and a molding position at which a molding machine is located, the switching device switching a lower mold carrier plate used in the molding machine; a carrier plate storage device provided adjacent to the loading/unloading position, a plurality of standby positions at which the carrier plates are arranged side-by-side being set on the carrier plate storage device; a handover device provided at the loading/unloading position, the handover device handing over the carrier plates between the switching device and the carrier plate storage device; a movement path provided parallel to the plurality of standby positions and the loading/unloading position; a moving body that moves along the movement path and that detachably engages with one of the carrier plates and moves the carrier plate to the next standby position or the loading/unloading position; and a moving body drive device for driving the moving body.
Provided is a post-pouring mold removal device that uses an electric motor, the mold removal device capable of generating a large torque initially and then performing an upward-removal operation at high speed. The post-pouring mold removal device comprises: an electric motor; a drive mechanism including a rotating drive shaft that is driven by the electric motor; a lifting/lowering frame that enables lifting and lowering of a sand mold portion while supporting the lower surface thereof; a link member provided between the drive mechanism and the lifting/lowering frame; and an ascent regulation device that abuts on the outer periphery of a mold frame to regulate the ascent of the mold frame. The drive mechanism comprises: a displacement unit that, in a removal position for removing the sand mold portion from the mold frame, cooperates with the ascent regulation device to displace the lifting/lowering frame by a predetermined length in order to detach the sand mold portion from the mold frame; and an upward-removal unit that removes the displaced sand mold portion upward, with a force smaller than the force of displacement by the displacement unit and at a speed higher than the speed of displacement by the displacement unit.
Provided is a post-pouring mold removal device that uses an electric motor, the mold removal device being capable of generating a large torque initially and then performing a removal operation at high speed. The post-pouring mold removal device comprises: an electric motor; a drive mechanism comprising a rotating drive shaft; a link member having a lower part linked with the drive mechanism; a vertical guide member that is linked with the link member to guide the motion of the link member in a vertical direction; a lifting/lowering frame that, in a removal position, moves up and down while being abutted on the upper surface of a sand mold portion of a post-pouring mold; and a mold frame descent regulation device that, in the removal position, regulates downward movement of the mold frame. The drive mechanism comprises: a displacing unit that, in the removal position, cooperates with the mold frame descent regulation device to displace the lifting/lowering frame downward by a predetermined length; and a downward-removal unit that removes the displaced sand mold portion from the mold frame downward, with a force smaller than the force of displacement by the displacing unit and at a speed higher than the speed of displacement by the displacing unit.
Provided is a mold-forming method with which it is possible, in a three-stage squeeze step in which an electric motor is used, to speedily and smoothly switch from a second squeeze step to a third squeeze step. This mold-forming method, performed using a mold-forming device having a pressing member, a drive mechanism provided with an output unit, an electric motor, a stopper device that restricts an upward relative movement of a molding flask, and a pressure adjustment device for causing the pressing member to produce a prescribed pressing force, comprises: a first squeeze step for moving the pressing member into a forming space towards the back surface of a model; a second squeeze step for restricting the molding flask from approaching the pressing member side by means of the stopper device, and moving the model and a model surface plate into the forming space; and a third squeeze step for disengaging the restriction by the stopper device, and moving the pressing member into the forming space towards the back surface of the model in a state in which the movement of the output unit in the second squeeze step is maintained.
Provided are a casting mold shaping apparatus and a casting mold shaping method that make it possible to reduce equipment costs and to shape a mold by squeezing molding sand by means of a driving mechanism that employs an electric motor. This casting mold shaping apparatus comprises: a pressing member which, in a molding space formed by a carrier plate and a molding flask placed on a squeeze table, presses molding sand charged therein; a driving mechanism which performs driving so as to make the distance between the pressing member and the squeeze table close to or separated from each other and which is also equipped with an output unit which makes a relative movement along a direction in which the pressing member performs pressing; an electric motor which drives the driving mechanism; and a pressure adjustment device which makes an adjustment so as to cause a reduction in the force of the driving mechanism to be outputted to the output unit and to thereby cause the pressing member to generate a prescribed pressing force required for pressing the molding sand.
B22C 15/02 - Serrage par moyens presseurs uniquement
B30B 1/26 - Presses, utilisant un élément pilonnant, caractérisées par le mode d'entraînement du pilon, la pression étant transmise au pilon ou à la platine de presse directement ou uniquement par l'intermédiaire d'organes travaillant en simple poussée ou traction par des cames, des excentriques ou des vilebrequins
Provided is an electric squeeze device that is formed of simple components and with which it is easy to carry out maintenance management and stroke volume changes. This electric squeeze device 1 comprises: a squeeze frame 5 that applies a pressurizing force to foundry sand S; a swing arm 7 that is positioned on the upper side of the squeeze frame 5 and reciprocates at a prescribed angle relative to a rotation center O; a link 8 having one end side linked at a position a rotation radius A from the rotation center O of the swing arm 7, and the other end side linked to the squeeze frame 5; a driven gear 49 that is formed along a virtual arc a rotation radius B from the rotation center O of the swing arm 7; a driving gear 10 that meshes with the driven gear 49; and an electric motor 12 that rotationally drives the driving gear 10. The electric squeeze device 1 rotates the electric motor 12 forward and in reverse, to move the squeeze frame 5 up and down using the swing arm 7 and the link 8, and is set such that the size of the rotation radius B is greater than the size of the rotation radius A, and the downward pressurizing force applied to the squeeze frame 5 increases.
B30B 1/02 - Presses, utilisant un élément pilonnant, caractérisées par le mode d'entraînement du pilon, la pression étant transmise au pilon ou à la platine de presse directement ou uniquement par l'intermédiaire d'organes travaillant en simple poussée ou traction par un mécanisme à levier
B22C 15/02 - Serrage par moyens presseurs uniquement
8.
CASTING MOLD SHAPING DEVICE AND CASTING MOLD SHAPING METHOD
Provided are a casting mold shaping device and a casting mold shaping method with which wasted strokes for squeezing are minimized, and the efficiency of carrier plate exchange work and supplemental work is improved. The present invention comprises: a turntable-type carrier plate exchange device; a molding flask loading/unloading device for loading a molding flask into a shaping space formation position provided in the carrier plate exchange device and unloading the shaped molding flask therefrom; a molding flask-carrier plate overlapping device for overlapping the loaded molding flask and each carrier plate to form a shaping space; a molding sand filling device for filling the shaping space with molding sand; a shaping station provided adjacent to the shaping space formation position and comprising a molding sand pressing device for pressing the molding sand to shape a casting mold; and a molding flask-carrier plate moving device for moving the carrier plate and the molding flask in the overlapped state from the shaping space formation position to the shaping station.
B22C 15/02 - Serrage par moyens presseurs uniquement
B22C 11/04 - Machines dans lesquelles les moules se déplacent pendant un cycle d'opérations successives sur une table ou un transporteur horizontal rotatif
B22C 17/08 - Machines à mouler avec mécanisme de retournement de la plaque modèle ou du moule autour d'un axe horizontal
APPARATUS FOR ESTIMATING BINDER CONTENT IN RECOVERED GREEN SAND, APPARATUS FOR ADJUSTING RECOVERED GREEN SAND, AND METHOD FOR ESTIMATING BINDER CONTENT
Provided is an apparatus for estimating the binder content in recovered green sand, said apparatus analyzing the recovered green sand on a casting line in real time such that a binder to be included in the recovered green sand can be adjusted. Said apparatus is provided with: a compressibility value measurement device; a moisture content measurement device; a compressibility value and moisture content storage unit that stores a compressibility value and moisture content reference relationship representing the relationship between a reference content compressibility value and a moisture content in reference recovered green sand, and a compressibility value and moisture content offset relationship representing the relationship between a compressibility value and a moisture content in offset recovered green sand; and a binder content calculation unit that obtains a reference compressibility value of reference green sand corresponding to the measured moisture content on the basis of the compressibility value and moisture content reference relationship, obtains an offset compressibility value of the offset recovered green sand corresponding to the measured moisture content on the basis of the compressibility value and moisture content offset relationship, and estimates the content of a binder in to-be-recovered green sand on the basis of a reference content, an offset content, the measured compressibility value, the measured reference compressibility value, and the measured offset compressibility value.
B22C 5/00 - Machines ou dispositifs spécialement conçus pour la préparation ou la manutention des matériaux à mouler, dans la mesure où ils sont spécialement adaptés à cette fin
B22C 1/00 - Compositions des matériaux réfractaires pour moules ou noyauxLeur structure granulaireCaractéristiques chimiques ou physiques de la mise en forme ou de la fabrication des moules
Provided is a device for cooling recovered molding sand, said device having a compact and simple structure. A device (3) for cooling recovered molding sand is provided with: a disc-shaped table (31) which is rotatably provided to a device body (2), and to which molding sand (MS) is supplied; a molding sand supply unit (33) which is provided to one side among an outer circumferential side (31o) and a central side (31i) of the disc-shaped table, and which supplies molding sand; a molding sand discharge unit (34) which is provided to the other side among the outer circumferential side and the central side of the disc-shaped table, and which discharges molding sand; a table rotation driving unit (35) which rotates the disc-shaped table; a rotation course displacement device (36) which displaces the rotation course of molding sand, which is rotating together with the disc-shaped table, from a molding sand supply unit side to a molding sand discharge unit side; and a stirring device (37) which is provided to the device body so as to be positioned between the outer circumferential side and the central side of the disc-shaped table, and which stirs the molding sand on the disc-shaped table.
B22C 5/04 - Machines ou dispositifs spécialement conçus pour la préparation ou la manutention des matériaux à mouler, dans la mesure où ils sont spécialement adaptés à cette fin par broyage, mélange, malaxage, agitation
B22C 5/08 - Machines ou dispositifs spécialement conçus pour la préparation ou la manutention des matériaux à mouler, dans la mesure où ils sont spécialement adaptés à cette fin par pulvérisation, refroidissement ou séchage
Provided is a mold manufacturing method with which casting sand filling a difficult-to-fill location can be squeezed uniformly. This mold manufacturing method uses a mold manufacturing device equipped with a squeeze head, a squeeze table, a pattern-fixing board, a casting frame, an upper molding frame (6), a casting sand charging device, multiple squeeze feet (2a) mounted on the squeeze head, and a driving device that brings the squeeze table and the squeeze head into proximity with each other, thereby performing squeezing by means of the multiple squeeze feet. This mold manufacturing method is equipped with: a casting sand charging step, wherein a sand flow restriction member (9) in which hollow holes (9a) are formed, and which restricts the horizontal flow of the casting sand by means of the inner walls of the hollow holes when the casting sand is squeezed by the squeeze feet, is placed inside the upper molding frame, and casting sand is introduced into a combined frame by the casting sand charging device; and a back-surface squeezing step, wherein the squeeze feet are inserted into the hollow holes in the sand flow restriction member arranged in the upper molding frame, and squeezing is performed from the back-surface side.
A carriage conveyance device which smoothly and quickly conveys molding flasks and molds, comprises a simple and inexpensive mechanism, and can reduce facility costs. A carriage conveyance device comprises: movement bodies (20, 22) which are provided corresponding to a first conveyance path (6) and a second conveyance path (8) and which reciprocate a given distance along the conveyance paths; loading-side engagement means (78) which are each provided to the upstream end position side of each of the movement bodies, the loading-side engagement means (78) being configured so that, when the movement body (20) advances to the downstream side of one (6) of the conveyance paths, the loading-side engagement means (78) engages with a carriage (4), which is located at a loading position of said conveyance path (6), and so that, when the movement body (20) recedes to the upstream side of said conveyance path (6), the loading-side engagement means (78) disengages from the carriage (4); unloading-side engagement means (80) which are each provided to the downstream end position side of each of the movement bodies (20, 22), the unloading-side engagement means (80) being configured so that, when the movement body (20) advances to the downstream side of said conveyance path (6), the unloading-side engagement means (80) engages with a carriage (4), which is located at the downstream end position of said conveyance path (6), to restrict the free movement of carriages in the downstream direction; and a drive means (28) which reciprocates the movement body (20) a given distance.
B65G 35/06 - Transporteurs mécaniques non prévus ailleurs comportant un porte-charges se déplaçant le long d'un circuit, p. ex. d'un circuit fermé, et adapté pour venir en prise avec l'un quelconque des éléments de traction espacés le long du circuit
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