JP4794426B2 - Mold making system - Google Patents

Description

  The present invention relates to a mold making system, and in particular, a series of filling a resin-coated sand into a molding cavity of a mold mold and then blowing water vapor to form a predetermined mold and further releasing the mold. The present invention relates to a new mold making system that automatically performs the above operation.

  Conventionally, sand molds and molds have been mainly used as molds, except for special cases, which are properly used according to the type of casting material (molten metal) and casting method. Yes. Of these molds, the sand mold is usually formed (molded) into a desired shape by adding various binders to the foundry sand and curing it. As is well known, such sand molds are classified into green molds, thermosetting molds, gas curing molds, self-hardening molds, and other molds depending on the type of binder and the curing mechanism. However, each of these conventional molds exhibits unique advantages, but at the same time, various problems are caused during its manufacture.

  For example, when forming a green mold, there is a problem that productivity is lowered because a long time is required for curing due to the properties of the binder used. In general, a thermosetting mold uses a mold mold in which a mold cavity corresponding to the target mold shape is formed, and heat-resistant particles are heated in the mold cavity of the mold mold. Filled with resin-coated sand coated with a curable resin binder and heat-cured, it is molded, but when molding such a thermosetting mold, the resin-coated sand is quickly heat-cured. Therefore, it is necessary to heat the mold for molding to a high temperature of 300 ° C. or higher, which not only causes an increase in cost, but also a harmful gas may be generated by the high temperature heating of the thermosetting resin binder. There was also.

  Furthermore, in the molding of a gas curing mold, a toxic gas may be used as a gas used for curing the binder, and in that case, an extra cost is required to ensure the safety of the worker and the prevention of environmental pollution. And had the disadvantage of being forced to work. Further, when molding a self-hardening mold, the mold is cured by being left for a predetermined time after being molded into a predetermined shape, so that the curing time becomes unavoidably long. There was a problem.

  Under such circumstances, after the resin-coated sand is filled into the molding cavity of the mold for molding, water vapor is blown into the molding cavity to cure the thermosetting resin binder, and the resin-coated sand in the molding cavity. A so-called steam blow molding method has been proposed in which a mold is formed by solidifying (see, for example, Patent Documents 1 to 4).

  Specifically, when carrying out this steam blow molding, first, the outlet of the hopper in which the resin-coated sand is accommodated is connected to a molding cavity provided in the mold for molding (injection hole). Then, a filling step is performed in which the resin-coated sand in the hopper is filled with, for example, compressed air by being blown into the molding cavity through the outlet of the hopper and the communication hole of the mold for molding. Next, after releasing the connection between the outlet of the hopper and the communication hole of the mold for molding, a steam pipe is connected to the communication hole of the mold for molding, and then water vapor is formed through the communication hole of the mold for molding. A molding process is performed in which a mold is formed by blowing into the cavity. Subsequently, a mold release step is performed in which the mold for molding is opened and the formed mold is taken out from the molding cavity.

  According to such a steam blow molding, since the thermosetting resin binder is instantly cured by water vapor blown into the molding cavity, not only the curing time of the binder can be advantageously shortened, Since the temperature of the mold for molding may be set to a relatively low temperature that can prevent the temperature of the steam from being lowered when steam is blown into the molding cavity, the heating cost of the mold for molding is It is possible to keep the temperature sufficiently lower than when molding a thermosetting mold, and water vapor itself is completely harmless, and generation of harmful gas due to high temperature heating of the thermosetting resin binder is advantageously avoided. obtain. Therefore, a number of problems in terms of economy, production, and safety that occur when a mold is formed by the conventional method as described above can be solved.

  However, in the past, steam blow molding has been carried out by human work from the filling process through the molding process to the mold release process. From this point of view, work safety and efficiency There was still room for improvement in terms of sex.

JP 2000-61583 A JP 2000-79444 A JP 2000-84641 A JP 2000-107835 A

  Here, the present invention has been made in the background as described above, and the problem to be solved is from the filling of the resin-coated sand into the molding cavity of the mold for molding, to the molding cavity. Molding by injecting water vapor into the mold, and further, mold release from the mold for molding is automatically and continuously carried out without any human intervention as much as possible. An object of the present invention is to provide a mold making system in which a target mold can be formed safely and efficiently.

  In the present invention, in order to solve such a problem, (a) a mold for forming a mold including two divided molds, in which a predetermined molding cavity is formed by mold matching, and (b) the mold A filling station in which resin-coated sand formed by coating refractory particles with a thermosetting resin binder is blown into the molding cavity of the mold for molding together with compressed air, and (c) the resin. Steam is blown into the molding cavity of the mold for molding filled with the coated sand to cure the thermosetting resin binder, and the resin-coated sand in the molding cavity is solidified to obtain a predetermined mold. And (d) separating the mold formed in the molding cavity from the mold cavity by opening the mold for molding. A station, (e) a drive means, a rotary drive shaft that is driven to rotate in accordance with the drive of the drive means, and a drive means for driving the drive means. And a connecting arm that is rotated integrally with the rotary drive shaft around the rotary drive shaft, and extends in an arc or circle around the rotary drive shaft from the filling station through the molding station. A traveling rail laid to reach the release station, and connected to the connecting arm, disposed on the traveling rail, and with the rotation of the connecting arm around the rotational drive shaft driven by the driving means And a transport device having a carriage on which the mold-molding die is placed, which is caused to travel on the running rail, and the mold-molding die is placed on the cart of the transport device The mold is formed by being sequentially conveyed from the filling station through the molding station to the release station as the carriage travels. The gist of the mold making system.

  According to one of the preferred embodiments of the mold making system according to the present invention, a suction device that sucks the gas in the molding cavity of the mold for molding is installed in the molding station.

  According to another preferred embodiment of the present invention, one of the two split molds in the mold for molding is a mold-matching surface with the other split mold of them. Is fixed to the carriage of the transfer device on the opposite side, and the mold is opened while the other split mold is separated from the one split mold. From the state, a mold opening / closing mechanism for closing the mold forming mold by bringing the other divided mold close to the one divided mold is provided between the mold forming mold and the carriage.

  Furthermore, according to one of the desirable aspects of the present invention, the connection arm of the transport device is provided to be rotatable about a central axis of the connection arm with respect to the rotation drive shaft, Along with the rotation of the connecting arm around the central axis, the connecting arm is configured to rotate together with the connecting arm, and independent of the rotation of the connecting arm around the rotational drive shaft. Second driving means for rotating around the axis is further provided in the transport device.

  Furthermore, according to one of the preferred embodiments of the present invention, the molding rail is moved from the filling station in a state where the traveling rail of the transport device extends in an arc or circle around the rotational drive shaft. A pair of outer rails laid so as to reach the release station via the station, and the rotary drive shaft between the pair of outer rails and the portion from the filling station to the front of the release station. A plurality of first wheels each having an inner rail laid so as to continuously extend while drawing an arc as a center, the carriage being mounted on the pair of outer rails, and the inner rail A plurality of second wheels mounted on each of the two wheels, and the plurality of first wheels are provided on two sides of the carriage located on both sides in the central axis direction of the connecting arm. versus The plurality of second wheels are opposite to the surface on which the mold forming die of the carriage is placed, while projecting laterally from the respective side portions on the central axis of the connecting arm. Arranged on the side surface at a predetermined distance from each other in the traveling direction of the carriage, and the carriage is supported on the pair of outer rails by the plurality of first wheels at the release station. In a state, it can be rotated around the central axis of the connecting arm.

  Further, according to another desirable aspect of the present invention, the endless rail laid endlessly so that the traveling rail of the transport device extends while drawing a circle around the rotation drive shaft. And the carriage is configured to run on the endless rail as the connection arm rotates in one direction around the rotation drive shaft.

  Further, according to another preferred aspect of the present invention, three trolleys are arranged on the endless rail of the traveling rail so as to be equidistant from each other in the circumferential direction. Three connecting arms are provided on the shaft at an equal distance in the circumferential direction, and the three connecting arms are connected to the three carriages one by one, respectively, and the filling station The molding station and the release station are installed so as to be located at an equal distance from each other in the circumferential direction of the traveling rail.

  Still further, according to another preferred embodiment of the present invention, filling information including respective amounts of the resin-coated sand and the compressed air to be blown and filled into the molding cavity at the filling station, and the molding An IC tag written with molding information including the amount of water vapor blown into the molding cavity at a station is attached to the mold for molding, while the filling information written into the IC tag and the molding A reading device for reading information, and based on the filling information and the molding information read by the reading device, the filling amount of the resin-coated sand and the blowing amount of the compressed air at the filling station, A controller for controlling the amount of water vapor blown at the molding station is further provided.

  That is, in the mold making system according to the present invention, from the filling step of filling the resin-coated sand into the molding cavity of the mold for molding, steam is blown into the molding cavity filled with the resin-coated sand, and the resin-coated sand Through the molding process of forming a mold by solidifying the sand, the transition from each process until the mold release process for removing the formed mold from the molding cavity is automatically performed by the transfer device without any manual intervention. Can be done. As a result, the man-hours required for man-made work for forming the target mold can be advantageously reduced.

  Moreover, in the mold making system according to the present invention, the traveling rail of the transfer device is laid so as to extend from the filling station to the mold release station in a state extending in an arc or a circle, For example, the traveling rail is laid so as to extend straight in a straight line, and the filling station, the molding station, and the release station are arranged in a straight line along the traveling rail at a predetermined distance in that order. The linear distance from the start end to the end of the traveling rail in the transport device, and thus the entire system, is advantageously reduced as compared with the case where the system is installed, and thus the entire system can be made compact. .

  In addition, in the system of the present invention, the carriage on which the mold for molding is placed is connected to a connection arm provided on the rotation drive shaft, and the rotation drive shaft and the connection arm accompanying the drive of the drive means For example, the carriage is reduced in weight more advantageously than the one having a self-propelled structure in which the driving means is mounted, so that the carriage can be driven on the running rail. Handleability is improved, and the parts of the transport device are compared to the structure in which the carriage is driven by rotating the endless belt or chain by rotating the drive roller or drive gear. The number of points can be advantageously reduced to simplify the structure of the transport device.

  Therefore, in the mold making system according to the present invention as described above, from the filling of the resin-coated sand into the mold cavity of the mold for molding, the mold is made by blowing water vapor into the mold cavity, and further, the mold is made. Until the mold is released from the mold for molding, it is automatically and continuously performed with as little manual labor as possible, so that the target mold can be molded more safely and efficiently. obtain. In addition, it is possible to advantageously reduce the size of the transport device, and thus the entire system, and to simplify the structure, and to effectively reduce the installation space of the system due to such downsizing.

  Further, in the mold making system according to the present invention, since the carriage on which the mold for molding is placed is connected to the connection arm provided on the rotation drive shaft, for example, the connection arm is arranged around its central axis. If the mold for molding is fixed to the carriage so that it can be attached to and detached from the carriage, the mold for molding can be rotated for each carriage, whereby the mold for molding at the release station. When the mold is opened, the mold is not only opened in the vertical direction (horizontal split), but the mold is opened in the horizontal direction (vertically split) simply by rotating the connecting arm 90 °. It is possible to do it easily.

  Hereinafter, in order to clarify the present invention more specifically, the configuration of the present invention will be described in detail with reference to the drawings.

  First, FIG. 1 to FIG. 3 show, as an embodiment of a mold making system having a structure according to the present invention, a system for forming a core in a perspective form, a side form and a plane form, respectively. It is shown schematically. As is apparent from these drawings, the mold making system of the present embodiment includes a mold 10, a transport device 12 for transporting the mold 10, and a traveling rail provided in the transport device 12. 14, a filling station 16, a molding station 18, and a release station 20 that are installed at a predetermined distance from each other. In FIG. 1 and FIG. 2, a main hopper and a belt conveyor, which will be described later, installed in the filling station 16 are omitted in order to facilitate understanding of the structure of the mold making system of the present embodiment. Should be understood.

  More specifically, the mold 10 has a first split mold 22 and a second split mold 24 as is apparent from FIGS. 1, 4 and 5. These two split molds 22 and 24 are both made of a metal material and have a rectangular block shape as a whole. The first split mold 22 and the second split mold 24 are overlaid with each other in the vertical direction with the former facing upward, while being matched (closed), while the first split mold 22 However, the mold is opened by being spaced apart from the second split mold 24.

  In addition, a cavity forming recess is formed at the center of each mold fitting surface (the lower surface of the first divided mold 22 and the upper surface of the second divided mold 24) of the first divided mold 22 and the second divided mold 24. 26 are formed respectively. Then, by matching the first split mold 22 and the second split mold 24, the split molds 22 and 24 have a shape corresponding to the outer shape of the target core between the mating surfaces of each other. Molding cavities 28 are formed at the respective cavity forming recesses 26.

  Further, the first split mold 22 has a sand supply port formed of a through hole that opens in the cavity surface (upper inner surface) and the upper surface, which penetrates the first split mold 22 in the thickness direction and provides the bottom surface of the cavity forming recess 26. 27 are formed, for example, four (only two are shown in FIGS. 4 and 5). On the other hand, the second split mold 24 also penetrates through it in the thickness direction, and is a vent hole made up of a through hole that opens at the cavity surface (lower inner surface) and the lower surface that give the bottom surface of the cavity forming recess 26. 29 are formed so as to correspond to the same number of sand supply ports 27 provided in the first split mold 22 (only two are shown in FIGS. 4 and 5). Each of the four vent holes 29 is provided with one mesh cap 31 that allows air to pass therethrough but prevents the resin-coated sand from passing as much as possible. As a result, when filling the resin-coated sand 28 described later into the molding cavity 28 or molding the resin-coated sand, the resin-coated sand is sufficiently prevented from being discharged through the vent hole 29, and compressed air is blown into the molding cavity 28. The suction of air from the inside of the molding cavity 28 can be reliably performed without any obstacles.

  Further, as shown in FIGS. 1 to 3, the transport device 12 for transporting the mold for molding 10 includes a carriage 30 and a main shaft 32 as a rotational drive shaft in addition to the traveling rail 14 to be moved. I have. Among them, the traveling rail 14 has a relatively wide space between a pair of outer rails 34 and 34 that extend continuously and endlessly in a circle, and between the pair of outer rails 34 and 34. It further has a pair of inner rails 36, 36 that extend continuously so as to draw a 3/4 round arc on the same axis of the pair of outer rails 34, 34 with a narrow spacing.

  That is, here, the traveling rail 14 is composed of two types of rails, a pair of outer rails 34, 34 and a pair of inner rails 36, 36 that extend coaxially in a circle or arc shape. The outer rail 34 and the inner rail 36 are arranged side by side at a portion corresponding to 3/4 of the outer rail 34 in the traveling rail 14, while the outer rail Only 34 is provided, and no inner rail 36 is provided. Each of the outer and inner rails 34 and 36 is configured such that an annular or arcuate support plate portion having a constant thickness is supported by a plurality of support columns having the same height. .

  Further, as shown in FIGS. 1 to 5, the carriage 30 has a rectangular base board 38 having a width slightly larger than the distance between the pair of inner rails 36, 36 in the traveling rail 14 and a sufficiently large thickness. have. And in this base board 38, while the upper surface is used as the mounting surface 40 which consists of a flat surface, the inner caster 42 as a 2nd wheel is each in the four corners on the lower surface. It is provided so that it may be located one by one. Each of these four inner casters 42 is attached such that a support portion for supporting the axle is rotatable about a single axis extending in a direction perpendicular to the axle with respect to the lower surface of the base board 38.

  A shaft arm 44 having a columnar shape or a round bar shape is provided at the center of each of two opposing side surfaces of the base board 38 in a direction perpendicular to the thickness direction of the base board 38 and The base board 38 is integrally provided with a predetermined length extending outward in the opposite direction of the two side surfaces of the base board 38. And the outer side caster 46 as a 1st wheel is each rotatably supported by the front-end | tip part of each such axial arm 44 (refer FIG. 9). Each of these two outer casters 46, 46 has a diameter larger than the thickness of the base board 38 by a predetermined dimension, and the height from the lower surface of the base board 38 to the grounding surface is the base board in each of the inner casters 42. The height is the same as the height from the bottom surface of 38 to the ground contact surface.

  Of the four inner casters 42 provided on the cart 30 having such a structure, two of the inner casters 42 are disposed on one side in the width direction of the base board 38. One inner rail 36 is mounted with a gap in its extending direction, while the other two are placed with a distance in the extending direction with respect to the other inner rail 36. , Respectively. The two outer casters 46 are placed one by one on the pair of outer rails 34, 34. As a result, the carriage 30 is arranged on the traveling rail 14 and an external force is applied to the carriage 30 in such an arrangement state, so that the carriage 30 travels (runs) on the traveling rail 14. It is supposed to be squeezed.

  As shown in FIGS. 4 and 5, the mold forming die 10 is placed on the placement surface 40 of the base board 38 of the carriage 30. Then, under such placement, the four divided molds 24 of the mold 10 are drilled so that the four vent holes 29 extend in the thickness direction with respect to the base board 38. The base board 38 is fixed in a state of communicating with each of the through holes 39. Further, of the side surfaces of the base board 38, two hydraulic cylinders 48 are provided on each of two other side surfaces adjacent to the two side surfaces on which the shaft-like arms 44 are integrally formed (see FIGS. 4 and 5). Are shown one at a time), and are fixedly attached to each other with a gap in the width direction of the base board 38. Each of the hydraulic cylinders 48 has a piston rod 50 that can be protruded / retracted in the mold opening / closing direction of the mold 10, and the piston rod 50 is formed at the tip of the mold 10. It is fixed to the first split mold 24. Accordingly, here, in the state where the mold 10 for molding is installed on the base board 38 of the carriage 30, the mold opening is performed in accordance with the protrusion / retraction operation of the four hydraulic cylinders 48 provided on the base board 38. / Mold closing (mold matching). As is clear from these facts, here, the mold opening / closing mechanism of the mold 10 is constituted by four hydraulic cylinders 48.

  On the other hand, as is apparent from FIGS. 1 and 3, the main shaft 32 that constitutes the conveying device 12 together with the carriage 30 and the traveling rail 14 is substantially higher than the height of the outer and inner rails 34 and 36 of the traveling rail 14. Presenting a cylindrical shape, the lower support portion 52 and the upper support portion 54 that respectively form the lower portion and the upper portion of the cylindrical shape, and located between the lower support portion 52 and the upper support portion 54, The rotary shaft portion 56 is rotatably supported with respect to the support portions 52 and 54. The main shaft 32 is installed so as not to move in a state where the main shaft 32 is positioned at the center of the outer and inner rails 34 and 36 extending in a circular or arcuate shape.

  Further, in such a main shaft 32, although not explicitly shown in the drawing, an electric servo motor is incorporated in either one of the lower support portion 52 and the upper support portion 54, and this A rotating shaft 56 is connected to the drive shaft of the servo motor so as not to be relatively rotatable. Further, a drive shaft extending in a direction perpendicular to the rotation shaft portion 56 is provided at a portion of the outer peripheral surface of the rotation shaft portion 56 located at substantially the same height as the traveling rail 14 (outer and inner rails 34 and 36). A hydraulic motor 58 with a not shown) is fixed. The drive shaft of the hydraulic motor 58 is connected to one of the two shaft-like arms 44 and 44 provided on the base board 38 of the carriage 30 disposed on the traveling rail 14 so as not to be relatively rotatable. Has been. That is, the rotating shaft portion 56 is connected to the shaft-like arm 44 of the carriage 30 via the drive shaft of the hydraulic motor 58.

  Thus, here, as the rotary shaft portion 56 is rotated by the drive of the servo motor built in the main shaft 32, the carriage 30 and the mold forming die 10 placed on the cart 30 have a rotation amount of the rotary shaft portion 56. It is possible to automatically travel on the traveling rail 14 by a distance corresponding thereto. Further, by the rotation of the hydraulic motor 58 provided on the rotary shaft portion 56, the carriage 30 and the mold forming die 10 are integrally rotated around the shaft-like arm 44.

  Further, the servo motor and the hydraulic motor 58 are electrically connected to a control device 60 disposed around the traveling rail 14. Thereby, in the transport device 12, under the control of the control device 60 and based on a predetermined operation by the control device 60, the rotation amount and the rotation direction of the rotary shaft portion 56 and the rotation amount of the shaft-like arm 44. In addition, the travel amount and travel direction of the carriage 30 on the travel rail 14 and the rotation amount and rotation direction of the carriage 30 around the shaft arm 44 are arbitrarily controlled. As is apparent from these, in this embodiment, the connecting arm is constituted by the drive shaft of the hydraulic motor 58 and the shaft-like arm 44 of the base board 38 of the carriage 30 connected thereto, and the hydraulic motor At 58, second drive means is configured.

  In the mold making system according to the present embodiment, as is apparent from FIGS. 1 to 3, the extension extending in an arc corresponding to 3/4 of the pair of inner rails 36, 36 in the traveling rail 14. For mold forming at a portion that is biased to the other end side by one-fourth turn from one end portion in the direction, that is, at a portion that is positioned with a 90 ° phase difference from the start end portion 37a to the end end portion 37b side of the inner rail 36 A filling device 62 for filling resin-coated sand, which will be described later, is installed in the molding cavity 28 of the mold 10, and a place where the filling device 62 is installed is a filling station 16. In addition, a steam blowing device 64 is installed in a portion of the pair of inner rails 36, 36 that is positioned with a phase difference of 90 ° from the installation location of the filling device 62 to the end portion 37b side. The installation location of the device 64 is a molding station 18. Further, in the traveling rail 14, only the pair of outer rails 34, 34 are provided without any inner rail 34 provided between the end portion 37 b and the start end portion 37 a of the pair of inner rails 36, 36. The location is a release station 20.

  In other words, in this case, the pair of inner rails 36 and 36 in the traveling rail 14 draw a circular arc corresponding to 3/4 rounds, and are released from the front of the filling station 16 through the filling station 16 and the molding station 18. The pair of outer rails 34, 34 are concentrically drawn with the pair of inner rails 36, 36 while passing from the filling station 16 through the molding station 18 and the release station 20. It is laid as an endless rail that extends again to the filling station 16.

  The filling device 62 installed in the filling station 16 is fixedly installed above a portion of the traveling rail 14 that is positioned with a phase difference of 90 ° from the start end 37a of the inner rail 36 to the end end 37b. A charging hopper 66, a blow head 68 disposed below the charging hopper 66, a main hopper 70 spaced apart from the traveling rail 14 in the radial direction, and a charging hopper 66 and a main A belt conveyor 72 is provided so as to extend between the hopper 70 and the hopper 70.

  In the filling device 62, for example, in the main hopper 70, for example, in Japanese Unexamined Patent Publication No. 2000-107835, Japanese Unexamined Patent Publication No. 2000-61583, Japanese Unexamined Patent Publication No. 2000-79444, Japanese Unexamined Patent Publication No. 2000-84641, and the like. A large amount of the resin-coated sand formed by coating refractory particles with a thermosetting resin binder is described. Then, the resin-coated sand taken out from the outlet of the main hopper 70 is conveyed to the input hopper 66 by the belt conveyor 72, and the capacity of the molding cavity 28 of the mold 10 is set in the input hopper 66. Also, a large amount is accommodated by a predetermined amount (volume integral). The charging hopper 66 has an upper end of the upper support portion 52 of the main shaft 32 in a state where the take-out nozzle 80 (see FIG. 6) provided at the lower end portion is positioned between the pair of inner rails 36 and 36. It is fixedly supported by two struts 67, 67 extending integrally with the L shape from the section.

  In addition, an IC tag 74 attached to the outer surface of the first split mold 22 of the mold 10 is written on one of the two columns 67 and 67 that support the charging hopper 66. A reading device 76 having a known structure for reading the information is fixed in a state of being electrically connected to the control device 60. Here, as will be described later, the filling amount (weight) of the resin-coated sand when the resin-coated sand is blown and filled with the compressed air into the molding cavity 28 of the mold 10 at the filling station 16 and the compression. The compressed air blowing time, which is an index of the amount of air blown, is written in the IC tag 74 as filling information. In the molding station 18, water vapor is introduced into the molding cavity 28 filled with the resin-coated sand. Water vapor blowing time, which is an index of the amount of water vapor blown, is also written in the IC tag 74 as molding information. Further, in the IC tag 74, when the mold forming mold 10 is opened at the mold release station 20, it is determined whether the mold opening direction is the vertical direction or the horizontal direction. Is further written.

  Then, when the mold 10 is placed on the carriage 30 and positioned at the filling station 16, the filling, molding, and mold release information written in the IC tag 74 is read by the reading device 76. Are read in an instant and transmitted to the control device, so that the filling, molding, and releasing operations respectively performed at the filling station 16, the molding station 18, and the release station 20 are based on the information. Thus, it is implemented while being automatically controlled.

  Further, as shown in FIG. 6, the blow head 68 is formed of a hollow body having a low truncated pyramid shape, and is connected to the input hopper 66 via two hydraulic cylinders 78 attached to the outer surface of the input hopper 66. In accordance with the projecting / retracting operation of each hydraulic cylinder 78, the hydraulic cylinder 78 is lowered / raised by a predetermined dimension. Further, an opening (not shown) that opens to the outside is provided on the upper end surface of the blow head 68, and the take-out nozzle 80 of the charging hopper 66 enters the blow head 68 through this opening. It has been. Further, four discharge ports 82 are provided on the lower end surface of the blow head 68 so as to be positioned corresponding to the four sand supply ports 27 of the first split mold 22 in the mold 10. ing. Furthermore, the blow head 68 is provided with a compressed air introduction nozzle 84, and an air pipe extending from a compressed air supply source such as a compressor or a high-pressure tank (not shown) to the compressed air introduction nozzle 84. 86 is connected.

  Although not explicitly shown in FIG. 6, a shutter that is controlled by the control device 60 and automatically opens and closes each discharge port 82 is provided inside the blow head 84. In the middle of the air pipe 86 connected to the introduction nozzle 84, an electromagnetic valve which is controlled by the control device 60 and automatically opens and closes is installed. In addition, a known sensor is installed to detect when the mold 10 is positioned at the position (filling station 16) where the blow head 84 is disposed on the traveling rail 14, and detection from this sensor is performed. A signal is input to the control device 60.

  Thus, in the filling device 62, as will be described later, when the mold 10 placed on the carriage 30 is positioned at the filling station 16, the blow head 68 causes the hydraulic cylinders 78 to project. The four discharge ports 82 are connected to the four sand supply ports 27 of the first split mold 22 in the mold 10. In such a state, the shutter and the solenoid valve of the air pipe 86 (not shown) are opened, so that the resin-coated sand supplied from the inside of the charging hopper 66 into the blow head 68 becomes compressed air introduction nozzle 84. And the compressed air introduced through the four exhaust ports 82 through the four sand supply ports 27 and can be blown into the molding cavity 28 of the mold 10. Thereby, in the filling station 16, the resin-coated sand is filled into the molding cavity 28 of the mold 10.

  The filling amount of the resin-coated sand into the molding cavity 28 is controlled by, for example, the opening operation time of the shutter provided in the blow head 68 based on the filling information written in the IC tag 74. The device 60 adjusts the amount to be a preset amount by setting the preset time. In addition, the amount of compressed air blown into the molding cavity 28 is also set in advance by the control device 60 based on the molding information written in the IC tag 74, with the control device 60 opening time of the electromagnetic valve provided on the air pipe 86. The operation of each hydraulic cylinder 78 that moves the blow head 68 up and down is also controlled according to the resin-coated sand and compressed air blowing time. It is controlled at 60.

  On the other hand, as shown in FIGS. 1 to 3, the steam blowing device 64 installed in the molding station 18 is connected to the end portion 37b side of the inner rail 36 from the inner rail 36 portion where the charging hopper 66 is installed above. The steam head 88 is fixedly installed above a portion positioned at a phase difference of 90 °.

  As is apparent from FIGS. 1, 7, and 8, the steam head 88 has a hollow, substantially rectangular casing shape as a whole, and is protruded / retracted in the vertical direction at both ends in the width direction of the upper surface. One hydraulic cylinder 92 is attached to each. And the front-end | tip part of the piston rod 94 of these two hydraulic cylinders 92 is attached to the attachment body 98 fixed to the two support | pillars 96 integrally extended in L shape from the upper end part of the upper side support part 52 of the said spindle 32. It has been.

  Further, in such a steam head 88, a connector 100 that communicates the inside and the outside is provided at the center of the upper surface, and further, four air outlets 102 are provided on the lower surface of the mold molding. The mold 10 is provided so as to correspond to the four sand supply ports 27 of the first split mold 22. A steam pipe 106 extending from a steam tank 104 filled with steam, which is installed around the traveling rail 14, is connected to the connector 100. Although not shown, an electromagnetic valve that is automatically controlled to open and close by being controlled by the control device 60 is installed in the middle of the water vapor pipe 106.

  Furthermore, a suction device 65 is installed in the molding station 18 in which such a steam blowing device 64 is installed. The suction device 65 has four suction nozzles 90 positioned vertically below the steam head 88. As shown in FIGS. 1 and 2, each of these suction nozzles 90 is a rectangular shape that can be moved up and down by a plurality (four in this case) of hydraulic cylinders 108 between a pair of inner rails 36 and 36. On the upper surface of the support plate 110, the support plate 110 is erected so as to be positioned corresponding to the four vent holes 29 of the second split mold 24 in the mold 10. Each of the suction nozzles 90 is connected to a suction pipe (not shown) extending from a vacuum tank 112 installed around the traveling rail 14. Although not shown, an electromagnetic valve that is automatically controlled to open and close by being controlled by the control device 60 is installed in the middle of the suction pipe. Further, a known sensor for detecting when the mold forming mold 10 is positioned at the position where the steam head 88 is disposed on the traveling rail 14 (molding station 18) is installed, and detection from this sensor is performed. A signal is input to the control device 60.

  Thus, here, as will be described later, when the mold forming mold 10 in which the resin-coated sand is filled in the molding cavity 28 at the filling station 16 is placed in the molding station 18 while being placed on the carriage 30. Further, the steam head 88 is lowered by the projecting operation of each hydraulic cylinder 92, and the four outlets 102 are respectively connected to the four sand supply ports 27 of the first split mold 22 in the mold 10. Is done. At the same time, the support plate 110 is raised by the protruding operation of the plurality of hydraulic cylinders 108 disposed below the steam head 88, and each suction nozzle 90 is moved to the four parts of the second split mold 24. It is made to rush into the vent hole 29. In such a state, when the solenoid valves (not shown) of the steam pipe 106 and the suction pipe are opened, the steam in the steam tank 104 is passed through the steam pipe 106 and the connector 100 in the steam head 88. And blown into the molding cavity 28 of the mold 10 from the four outlets 102, while the air in the molding cavity 28 passes through the suction nozzle 90 and the suction pipe. It is designed to be sucked outside. Thus, the resin-coated sand thermosetting resin binder is hardened, and the resin-coated sand is solidified in the molding cavity 28, so that a core is formed. .

Examples of water vapor blown from the steam head 88 into the molding cavity 28 include, for example, JP 2000-107835 A, JP 2000-61583 A, JP 2000-79444 A, and JP 2000-84641 A. As described in the official gazette and the like, saturated steam can be heated and heated steam having a temperature higher than the saturation temperature can be used. The steam has a temperature of about 110 to 180 ° C. and a steam pressure. Those having a relatively low temperature of about 1.5 to 10 kgf / cm ² are preferably used. Further, the amount of steam blown into the molding cavity 28 is determined based on, for example, the opening operation time of the electromagnetic valve provided on the steam pipe 106 based on the molding information written in the IC tag 74. At 60, it is adjusted to a preset amount by setting a preset time. The suction amount of air in the molding cavity 28 is also set in advance by the control device 60 based on, for example, molding information written in the IC tag 74, with the control device 60 opening time of the electromagnetic valve provided on the suction pipe. The operation time of the hydraulic cylinders 92 and 108 for moving the steam head 88 and the suction nozzle 90 up and down also depends on the time for which the steam is blown and the air suction time. In response to the above, it is controlled by the control device 60.

  As shown in FIGS. 1 to 3, the release station 20 is provided with a belt conveyor 114. The belt conveyor 114 is disposed so as to extend to the side of the traveling rail 14 from a portion between the pair of outer rails 34 in the release station 20. Further, the mold release station 20 is provided with a known sensor for detecting when the mold 10 is positioned, and a detection signal from this sensor is input to the control device 60. It is like that. When such a detection signal is input to the control device 60, each hydraulic cylinder 48 provided between the base board 38 of the carriage 30 and the second split mold 24 of the mold 10 is operated to project. As a result, the mold 10 is opened.

  Here, the mold opening operation at the mold release station 20 is performed under the control of the control device 60 based on the mold release information written in the IC tag 74. That is, if the mold opening direction of the mold 10 included in the mold release information is the vertical direction, the hydraulic cylinder 48 is operated to protrude and the mold opening (horizontal split) is performed without changing the posture of the carriage 30. On the other hand, if the mold opening direction included in the mold release information is the left-right direction, the hydraulic motor 58 of the main shaft 32 is driven to rotate by 90 ° counterclockwise, and the carriage 30 is attached to the shaft-shaped arm 44. It is rotated so that it rolls around the axis, and in that posture, mold opening (vertical split) is performed. At this time, the release station 20 is not provided with the inner rail 36, and only the outer caster 46 pivotally supported by the shaft-like arm 44 is arranged on the outer rail 34. The cart 30 can be smoothly rotated around the axial arm 44 in a state where the cart 30 is supported on the outer rails 34 by the outer casters 46, and such a cart 30 and a mold fixed to the cart 30 are fixed. It can be advantageously avoided that the inner rail 36 becomes an obstacle during rotation with the mold 10.

  Thus, when the mold 10 is opened at the mold release station 20, the core formed in the molding cavity 28 of the mold 10 is removed from the molding cavity 28 by human power or by its own weight. It is taken out and placed on the belt conveyor 114.

  By the way, when the target core is formed using the mold making system having such a structure, the operation is advanced according to the following procedure.

  That is, first, as shown in FIG. 9, the carriage 30 is positioned at the start end portion 37 a (see FIG. 3) of the pair of inner rails 36, 36 in the traveling rail 14, and here, the base board 38 of the carriage 30. On the other hand, the mold forming die 10 in which the molding cavity 28 having a shape corresponding to the target core is formed is placed and fixed. At this time, the mold 10 is brought into a mold matching state.

  Next, the servo motor in the main shaft 32 is driven to rotate, and the rotary shaft portion 56 and the shaft-like arm 44 connected thereto are driven to rotate in the clockwise direction. It runs on the outer and inner rails 34,36. At this time, when the carriage 30 reaches the filling station 16, it is detected by a sensor (not shown), and by the operation control of the control device 60, the rotational drive of the servo motor in the main shaft 32 is stopped, and the carriage 30 also travels. You can stop it. Thereby, the mold 10 is positioned at the filling station 16 as shown in FIG. At this time, the filling, molding, and release information written in the IC tag 74 attached to the mold 10 is read by the reading device 76 and transmitted to the control device 60. Is done.

  After that, based on the filling information of the information written in the IC tag 74, the blow head 68 of the filling device 62 is lowered as described above, and each discharge port 82 of the blow head 68 is molded. In this state, the shutter provided in the blow head 68 is opened and the resin-coated sand in the charging hopper 66 is blown through the compressed air introduction nozzle 84. Together with the compressed air introduced into the head 68, it is blown and filled into the molding cavity 28 of the mold 10. At this time, the compressed air blown into the molding cavity 28 is discharged to the outside from the vent hole 29 provided in the second split mold 24 in the mold 10. As a result, the resin-coated sand is filled into the molding cavity 28.

  Next, when the resin-coated sand blowing and filling operation is completed (when a predetermined time has elapsed from the start of the blowing and filling operation), the servo motor in the main shaft 32 is driven to rotate again, and the rotating shaft portion 56 and the shaft-like arm are driven. 44 is further rotated in the clockwise direction, and the carriage 30 is again driven on the outer and inner rails 34 and 36. At this time, when the carriage 30 reaches the molding station 18, it is detected by a sensor (not shown), the rotation drive of the servo motor in the main shaft 32 is stopped, and the traveling of the carriage 30 is also stopped. As a result, as shown in FIG. 10, the mold 10 is positioned in the molding station 18. In FIG. 10, it should be understood that the vacuum tank 112 and the control device 60 installed around the traveling rail 14 are omitted in order to facilitate understanding of the structure of the system of the present embodiment. It is.

  When the mold 10 is located at the molding station 18, the steam head 88 of the steam blowing device 64 descends under the control based on the molding information by the control device 60 as shown in FIG. While each outlet 102 of the head 88 is connected to each sand supply port 27 of the mold 10, the support plate 110 arranged below the steam head 88 rises and stands on this support plate 110. Each suction nozzle 90 is connected to each vent hole 29 of the mold 10. In this state, an electromagnetic valve provided on the steam pipe 106 or the suction pipe is opened, and steam is filled with resin-coated sand from the steam tank 104 through each outlet 102 of the steam head 88. While being blown into the molding cavity 28, the air in the molding cavity 28 is sucked to the outside through the suction nozzle 90. Accordingly, the resin-coated sand thermosetting resin binder in the molding cavity 28 is cured, and the resin-coated sand is solidified. As a result, a target core is formed in the molding cavity 28.

  Subsequently, when the molding operation of the core is completed (when a predetermined time has elapsed from the start of the molding operation), the servo motor in the main shaft 32 is driven to rotate again, and the rotating shaft portion 56 and the shaft-shaped arm 44 are connected to each other. While being further rotated in the direction of rotation, the carriage 30 is caused to travel again on the outer and inner rails 34 and 36. At this time, when the carriage 30 reaches the release station 20, it is detected by a sensor (not shown), the rotation of the servo motor in the main shaft 32 is stopped, and the traveling of the carriage 30 is also stopped. Thereby, as shown in FIG. 12, the mold 10 is positioned in the molding station 20.

  After that, when the mold opening direction of the mold for molding 10 in the mold release information input to the control device 60 is the vertical direction, as shown in FIG. Opened, the core (not shown) in the molding cavity 28 is taken out by, for example, human power and conveyed to a predetermined position by the belt conveyor 114.

  Further, when the mold opening direction of the mold 10 for mold release in the mold release information input to the control device 60 is the left-right direction, first, as shown in FIGS. After the hydraulic motor 58 provided in 56 is rotated and the carriage 30 is rotated, the mold is opened, and the core (not shown) in the molding cavity 28 is taken out by its own weight, for example, and then the belt conveyor. At 114, the sheet is conveyed to a predetermined position.

  Thus, according to the mold making system of the present embodiment, the resin-coated sand in the molding cavity 28 is solidified from the filling step of filling the molding cavity 28 of the mold 10 with the resin-coated sand. Through the molding process for forming the core, the transition of each process up to the mold release process for taking out the formed core from the molding cavity 28, and the work in each of these processes, without adding any manpower, This can be done automatically by the transport device 12. As a result, the number of man-hours required for forming the target core can be advantageously reduced.

  In this mold making system, the outer and inner rails 34 and 36 of the traveling rail 14 are laid so as to extend between the filling station 16, the molding station 18, and the release station 20 while drawing a circle or an arc. Therefore, for example, compared with the case where the traveling rail 14 is laid so as to extend straight between the filling station 16, the molding station 18, and the release station 20, the transport device 12, and thus The linear distance of the running rail 14 in the entire system is advantageously reduced, so that a compactness of the entire system can be realized effectively.

  Further, in the system of the present embodiment, the carriage 30 that conveys the mold for molding 10 is connected to the rotation shaft portion 56 of the main shaft 32 by the shaft-shaped arm 44, and the rotation shaft portion 56 is rotated. Thus, the vehicle can travel on the traveling rail 14. Therefore, for example, the carriage 30 can be advantageously reduced in weight as compared with a self-propelled structure in which driving means such as an electric motor is mounted, and the handling property can be effectively improved. In addition, by rotating the endless belt, the chain, or the like by the rotational driving of the driving roller or the driving gear, the number of parts of the conveying device 12 is advantageously reduced compared to the structure in which the carriage 30 is made to travel, It is possible to simplify the structure of the transport device 12, and thus the entire system.

  Moreover, in such a mold making system, the carriage 30 and the mold placed on the carriage 30 are simply driven by rotating the hydraulic motor 58 provided on the rotating shaft portion 56 of the main shaft 32 to which the shaft-like arm 44 of the carriage 30 is connected. The mold 10 is rotated around the shaft-shaped arm 44, so that the mold can be easily opened in the left-right direction.

  Therefore, according to the mold making system according to the present embodiment as described above, the filling of the resin-coated sand into the molding cavity 28 of the mold 10 and the injection of water vapor into the molding cavity 28 are performed. Molding (formation), and further, mold release from the mold forming mold 10 is performed automatically and continuously without any manpower as much as possible. Can be made more safely and efficiently. In addition, the entire system can be made compact and the structure can be simplified, and the space for installing the system can be effectively reduced by the compactification.

  Further, in such a mold making system, the suction device 65 is installed in the molding station 18, and when the steam is blown into the molding cavity 28 by the steam blowing device 64, the plurality of suction nozzles 90 of the suction device 65 are used. Since the air in the molding cavity 28 is sucked, water vapor can be blown more smoothly into the molding cavity 28 in a sufficient amount, thereby filling the molding cavity 28. Solidification of the resin-coated sand can be performed reliably and more quickly. As a result, the productivity of the target core can be improved more effectively.

  Furthermore, in the present embodiment, the second split mold 24 of the mold 10 is fixed on the base board 38 of the carriage 30 and is installed between the second split mold 24 and the base board 38. The four hydraulic cylinders 48 are used to open / close the mold 10 and the shaft arm 44 is rotated around the central axis by a hydraulic motor 58 provided on the main shaft 32. Therefore, the mold forming mold 10 can be opened and closed in the left-right direction at the mold release station 20, particularly with the carriage 30 and the mold forming mold 10 rotated sideways. However, it can be performed more easily and stably with a relatively simple structure.

  Furthermore, in the system of the present embodiment, the pair of outer rails 34, 34 on the traveling rail 14 draws a circle centering on the position where the main shaft 32 is disposed, and the molding station 18 and the release station 20 from the filling station 16. After that, it is laid as an endless rail extending again to the filling station 16, and the carriage 30 is allowed to travel (rotate) on the pair of outer rails 34, 34. Therefore, the filling process, the molding process, and the mold release process are repeatedly performed continuously while continuously traveling in one direction without changing the traveling direction of the carriage 30 traveling on the traveling rail 14. I can do it. As a result, the traveling control of the carriage 30 can be facilitated, and the production efficiency of the target core can be advantageously increased.

  In the mold making system of this embodiment, the IC tag 74 is attached to the mold 10 and the filling information, the shaping information, and the release information written in the IC tag 74 are filled. The filling process, the molding process, and the mold release process are automatically performed under the control of the control device 60 based on the information read by the reader installed in the station 16. . As a result, the human work required for molding the target core can be further advantageously reduced, so that the target core can be molded more safely and efficiently.

  The specific configuration of the present invention has been described in detail above. However, this is merely an example, and the present invention is not limited by the above description.

  For example, in the above-described embodiment, the traveling rail 14 has a pair of inner rails 36 and 36 extending in an arc of 3/4 rounds, and an endless pair of outer rails 34 and 34 extending in a circle. However, the circumferential length of only the inner rail 36 or both the inner rail 36 and the outer rail 34 can be changed.

  That is, for example, as shown in FIG. 16, the pair of outer rails 34, 34 are configured to extend while drawing an arc, and the pair of inner rails 36, 36 are made from the arc drawn by these outer rails 34. It is also possible to form a circular arc having a small circumferential length. Of course, in that case, the filling station 16, the molding station 18, and the release station 20 are installed in that order so as to be arranged side by side at a predetermined distance in the circumferential direction of the outer rail 34. According to such a structure, the further miniaturization of the transfer device can be achieved, and therefore the further compactness of the entire mold making system can be advantageously achieved.

  Alternatively, the pair of inner rails 36 and 36 may be omitted, and the traveling rail 14 may be configured with only a pair of outer rails 34 and 34 extending in a circle or an arc.

  Further, the servo motor that rotationally drives the rotary shaft portion 56 of the main shaft 32 is changed from an electric type to a hydraulic type, or the hydraulic motor 58 that rotationally drives the shaft-like arm 44 formed integrally with the carriage 30 is changed to an electric motor. Of course, it is possible.

  In the above-described embodiment, only one carriage 30 on which the mold 10 is placed is connected to the rotation shaft portion 56 of the main shaft 32 via the shaft-shaped arm 44, and the rotation shaft portion 56 is connected to the rotation shaft portion 56. , The traveling rail 14 travels (forwards) on a pair of endless outer rails 34, 34. For example, on the pair of endless outer rails 34, 34, The trolleys 30 are arranged at equal distances in the circumferential direction, and the trolleys 30 are respectively arranged at three parts spaced at equal distances in the circumferential direction of the rotation shaft portion 56 of the main shaft 32 as a rotation drive shaft. While being connected via the shaft-shaped arm 44, the filling station 16, the molding station 18, and the release station 20 are spaced apart from each other at an equal distance around the pair of outer rails 34, 34 in the circumferential direction of the outer rail 34. In the position It may be location.

  According to such a structure, every time the rotating shaft portion 56 of the main shaft 32 is rotated at a constant angle (120 °), the mold forming die 10 placed on the three carriages 30 is connected to the filling station 16. The molding station 18 and the release station 20 can be automatically moved in that order. As a result, the filling process, the molding process, and the mold release process can be performed separately and simultaneously on the three mold forming molds 10. Mold) can be made even more efficiently.

  Further, although the IC tag 74 and the reading device 76 attached to the mold 10 are not essential in the present invention, the type of information written in the IC tag 74 when it is configured to include them. Needless to say, the installation positions of the IC tag 74 and the reading device 76 are not limited to those illustrated in the embodiment.

  In addition, in the above-described embodiment, a specific example of applying the present invention to a mold molding system that molds a core has been shown. However, the present invention is not limited to any mold molding system that molds a mold other than a core. Of course, it can be applied advantageously.

  In addition, although not enumerated one by one, the present invention can be implemented in a mode in which various changes, modifications, improvements and the like are added based on the knowledge of those skilled in the art. In addition, it should be understood that any such embodiments are included within the scope of the present invention without departing from the spirit of the present invention.

It is a perspective explanatory view showing an example of a mold making system having a structure according to the present invention. It is II arrow explanatory drawing in FIG. It is III arrow explanatory drawing in FIG. FIG. 2 is a front explanatory view including a partially cutaway view showing a mold for molding provided in the mold making system shown in FIG. 1 in a state where it is placed on a carriage of a transfer apparatus of the mold making system. FIG. 5 is a front explanatory view showing the mold for molding shown in FIG. 4 in a state where the mold is opened. It is a perspective explanatory view showing a blow head installed in a filling station of the mold making system shown in FIG. It is front explanatory drawing which shows the steam head installed in the molding station of the casting_mold | template molding system shown by FIG. It is VIII-VIII cross-section explanatory drawing in FIG. It is explanatory drawing which shows an example of the process of shape | molding a casting_mold | template using the casting_mold | template shaping | molding system shown by FIG. 1, Comprising: The mold forming type | mold has been mounted in the trolley before the filling station. It is a figure for demonstrating the process performed following the process shown by FIG. 9, Comprising: The state which located the mold for shaping | molding in the molding station is shown. It is a figure for demonstrating the process performed subsequent to the process shown by FIG. 10, Comprising: The state which is injecting | pouring water vapor | steam in the shaping | molding cavity of the type | mold mold at a molding station is shown. It is a figure for demonstrating the process performed subsequent to the process shown by FIG. 11, Comprising: The state for which the mold for mold forming was located in the mold release station is shown. It is a figure for demonstrating the process performed following the process shown by FIG. 12, Comprising: The mold for mold shaping | molding is shown in the state which opened the mold (horizontal division) in the mold release station. It is a figure for demonstrating another process performed subsequent to the process shown by FIG. 12, Comprising: The state which rotated the trolley | bogie and the mold for shaping | molding 90 degrees in the molding station is shown. FIG. 15 is a diagram for explaining a process performed subsequent to the process shown in FIG. 14, in which a mold is opened from a state where the carriage and the mold for molding are rotated by 90 ° at the molding station ( (Vertically divided) is shown. It is a figure corresponding to FIG. 3 which shows another example of the mold making system which has a structure according to this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Mold for mold | die 12 Conveyance apparatus 14 Traveling rail 16 Filling station 18 Molding station 20 Mold release station 22 1st division | segmentation mold 24 2nd division | segmentation mold 28 Molding cavity 30 Bogie 32 Main shaft 44 Shaft arm 56 Rotary shaft part 58 Hydraulic pressure Motor 60 Control device 62 Filling device 64 Steam blowing device 65 Suction device 104 Steam tank 112 Vacuum tank

Claims (8)

A mold for molding which consists of two split molds, and a predetermined molding cavity is formed inside by mold matching,
A filling station that fills the molding cavity of the mold by blowing resin-coated sand formed by coating refractory particles with a thermosetting resin binder together with compressed air;
Steam is blown into a molding cavity of the mold for molding filled with the resin-coated sand to cure the thermosetting resin binder, and the resin-coated sand in the molding cavity is solidified to be predetermined. A molding station for forming a mold of
A mold release station for opening the mold for forming the mold formed in the molding cavity and taking out the mold from the molding cavity;
A drive means, a rotary drive shaft that is driven to rotate in accordance with the drive of the drive means, and a shaft that extends in a direction perpendicular to the rotary drive shaft; A connecting arm that rotates integrally with the rotary drive shaft and an arc or circle extending around the rotary drive shaft and extending from the filling station through the molding station to the release station. A traveling rail laid on the traveling arm and connected to the connecting arm, disposed on the traveling rail, and on the traveling rail along with the rotation of the connecting arm around the rotational drive shaft driven by the driving means. A transporting device provided with a carriage on which the mold for molding is placed;
The mold for molding is placed on the cart of the transport device and is sequentially transported from the filling station to the mold release station through the molding station as the cart travels. Thus, the mold making system is characterized in that the mold is formed.   The mold making system according to claim 1, wherein a suction device for sucking a gas in a molding cavity of the mold for molding is installed in the molding station.   One split mold of the two split molds in the mold for molding is fixed to the carriage of the transfer device on the surface opposite to the mold combining surface with the other split mold. At the same time, the other split mold is separated from the one split mold to open the mold for forming the mold, and from the mold open state, the other split mold is brought close to the one split mold. The mold making system according to claim 1 or 2, wherein a mold opening and closing mechanism for closing the mold for molding is provided between the mold for molding and the carriage.   The connection arm of the transport device is provided so as to be rotatable about a central axis of the connection arm with respect to the rotation drive shaft, and the carriage is rotated with respect to the rotation of the connection arm around the central axis. A second driving means configured to rotate together with the connecting arm and rotate the connecting arm around a central axis independently of the rotation of the connecting arm around the rotation driving shaft; The mold making system according to any one of claims 1 to 3, further provided in the apparatus.   A pair of rails laid so as to extend from the filling station through the molding station to the mold release station in a state where the traveling rail of the transfer device extends in an arc or circle around the rotation drive shaft. Between the outer rail and the pair of outer rails, a portion extending from the filling station to the front of the mold release station is laid so as to continuously extend while drawing an arc around the rotational drive shaft. A plurality of first wheels respectively mounted on the pair of outer rails, and a plurality of second wheels respectively mounted on the inner rails. Furthermore, the plurality of first wheels are connected to the two side portions of the carriage located on both sides in the central axis direction of the connecting arm, and the central axis of the connecting arm from each side portion thereof. Each of the plurality of second wheels is provided on the surface opposite to the surface on which the mold for forming the mold is placed on the surface of the vehicle in a running direction of the vehicle. The carriage is rotated around the central axis of the connecting arm in a state where the carriage is supported on the pair of outer rails by the plurality of first wheels at the release station. 5. A mold making system according to claim 4, which is adapted to be obtained.   The traveling rail of the transport device has an endless rail laid in an endless manner so as to extend while drawing a circle around the rotational driving shaft, and the carriage is the rotational driving shaft of the connecting arm. The mold making system according to any one of claims 1 to 5, wherein the mold making system is configured to run on the endless rail in accordance with rotational driving in one direction around.   Three trolleys are arranged on the endless rail of the traveling rail at equal intervals in the circumferential direction, and the connecting arms are spaced from each other in the circumferential direction on the rotary drive shaft. The three connection arms are connected to the three carriages one by one, respectively, and the filling station, the molding station, and the release station are connected to the periphery of the traveling rail. The mold making system according to claim 6, wherein the mold making system is installed so as to be located equidistant from each other in the direction. Molding information including the amount of the resin-coated sand and the compressed air that are blown and filled into the molding cavity at the filling station, and the amount of steam that is blown into the molding cavity at the molding station. An IC tag on which information is written is attached to the mold for molding, while a reading device that reads the filling information and the molding information written on the IC tag, and the reading device that reads the information Based on the filling information and the molding information, a control device for controlling the filling amount of the resin-coated sand at the filling station, the blowing amount of the compressed air, and the blowing amount of the water vapor at the molding station, The mold making system according to claim 1, further provided.

Images