Mold positioning device for core

Abstract

The present invention relates to a core mold positioning device that automatically sets and positions the installation position of a mounted core mold by repeatedly performing an installation position correction operation on the core mold mounted on a table until the horizontal and vertical alignment between the mold and the frame, or the bolt hole alignment, sensed by an optical sensor during the installation of the core mold, reaches a preset reference value. The present invention is characterized by adjusting the installation position of each mold by repeatedly performing coordinate movement in the X, Y, and Z axis directions and rotation in the A, B, and C axes so that the position of the bolt holes drilled in the mold for the core and the bolt holes formed in the installation frame, measured by a light sensor composed of a light-emitting part and a light-receiving part, and the mutual horizontal and vertical alignment between the mold for the core and the installation frame satisfy a predetermined reference value.

Description

Technology Field

[0001] The present invention relates to a core mold positioning device that automatically sets and positions the installation position of a mounted core mold by repeatedly performing coordinate movement in the X, Y, and Z axes and rotation in the A, B, and C axes until the horizontal and vertical alignment between the mold and the frame, or the bolt hole alignment, sensed by an optical sensor during the installation of the core mold, reaches a preset reference value. Background Technology

[0003] A casting generally referred to as a core is a consumable part manufactured using materials such as sand, installed inside a mold to create a hollow space within the molded product.

[0004] These cores are produced using molds, just like general molded products; however, instead of molten metal, molding sand is filled into the mold and solidified under high temperature and high pressure.

[0005] Casting dies typically consist of a set of front and rear dies. During the process of removing the solidified molded product, either the front or rear die moves, opens, and then re-aligns. If a collision occurs during this alignment process, the screws securing the dies to the frame may loosen. Consequently, if the dies become misaligned from the frame, product defects such as molded sand leakage or distortion of the core shape may occur.

[0006] Since molded products can result in defects during the manufacturing process due to even minute differences, correcting such mold distortion requires adjustment by skilled workers, posing a problem where it is difficult for unskilled workers to perform the task.

[0007] Recently, while the demand for molds has been showing a steady upward trend, the workforce for mold production is decreasing, necessitating the training of unskilled workers. However, due to the problem that the training process takes a long time, there is a need for technology that allows even unskilled workers to install them smoothly in order to secure production volume in line with the increased demand.

[0008] Meanwhile, various technologies are being developed to solve the mold warping problem described above, and Korean Registered Patent No. 10-1730390 (hereinafter referred to as the 'prior art') has been disclosed as prior art for these mold warping improvement technologies.

[0009] The above prior art is applied to a mold base comprising an upper plate to which a core is fixed, a lower plate to which a cavity is fixed, and a lower fixing plate that supports the upper plate and the lower plate, wherein there are a plurality of upper plate-side balance elements mounted on both sides of the upper plate at a certain distance apart and each arranged at a different height so as to be perpendicular to the mounting surface of the mold base; a plurality of lower plate-side balance elements mounted on both sides of the lower plate at a certain distance apart and each arranged at a different height so as to be perpendicular to the mounting surface of the mold base; and a one-side balance sensor member that detects one of the plurality of upper plate-side balance elements and one of the plurality of lower plate-side balance elements disposed on each side of the upper plate and the lower plate, and determines whether the detected upper plate-side balance element and the lower plate-side balance element match an element at a preset balance position. The present invention relates to a horizontal sensing device for a large mold base comprising: a balance sensor member for the other side that detects one of a plurality of upper plate-side balance elements and one of a plurality of lower plate-side balance elements disposed on each other side of the upper plate and the lower plate, and determines whether the detected upper plate-side balance element and the lower plate-side balance element match an element at a preset balance position; an infrared emitting member installed at a certain height above the first-side balance sensor member and capable of emitting infrared rays; and an infrared receiving member installed on the other-side balance sensor member at the same height as the height at which the infrared emitting member is installed on the first-side balance sensor member, and detects the flatness of the installation surface of the mold base by receiving infrared rays emitted from the infrared emitting member.

[0010] However, the aforementioned prior art is a device that performs only up to detecting abnormalities in the horizontal state; therefore, even if the actual mold is misaligned, it remains in that misaligned state unless separate measures are taken. Since this makes it impossible for unskilled workers to perform the task, there is still a problem in that it is difficult for unskilled workers to install the mold.

[0011] Therefore, the need has arisen for a core mold positioning device that automatically sets and positions the installation location of a mounted core mold by repeatedly performing coordinate movements in the X, Y, and Z axes and rotations in the A, B, and C axes until the horizontal and vertical alignment between the mold and the frame, or the bolt hole alignment, sensed by an optical sensor during the installation of the core mold, reaches a preset reference value. Prior art literature

[0013] Korean Registered Patent No. 10-1730390 (April 26, 2017) The problem to be solved

[0014] The present invention aims to solve the above-mentioned problems, and its purpose is to provide a core mold positioning device that automatically sets and positions the installation position of a mounted core mold by repeatedly performing coordinate movement in the X, Y, and Z axes and rotation in the A, B, and C axes until the horizontal and vertical alignment between the mold and the frame, or the bolt hole alignment, sensed by an optical sensor during the installation of the core mold, reaches a preset reference value.

[0015] In addition, another objective of the present invention is to provide a core mold positioning device that is easy to reinstall by detecting misalignment caused by collisions or vibrations between core molds during the core manufacturing process, notifying the user of this, and simultaneously transporting the core mold positioning device to readjust the installation position of the removed core mold. means of solving the problem

[0017] To achieve the above-mentioned objective, the present invention is characterized by adjusting the installation position of each mold by repeatedly performing coordinate movement in the X, Y, and Z axis directions and rotation in the A, B, and C axes so that the position of the bolt hole drilled in the mold for the core and the bolt hole formed in the installation frame, measured by a light sensor (20) composed of a light-emitting part (21) and a light-receiving part (22), or the mutual horizontal and vertical alignment between the mold for the core and the installation frame satisfies a predetermined reference value.

[0018] In addition, the core mold positioning device (1) is characterized by comprising: a base part (101) that moves in the X-axis direction along a rail installed at the bottom of the core manufacturing device (M); a table cylinder (102) installed on the upper part of the base part (101) that moves up and down in the Y-axis direction; a ball joint (103) installed at the end of the rod of the table cylinder (102) and formed to be able to rotate in the A-axis or C-axis; a slide table (104) installed on the ball joint (103) that slides in the Z-axis direction; and a rotary table (105) installed on the upper part of the slide table (104) that rotates in the B-axis.

[0019] In addition, the table cylinder (102) is installed in multiple numbers on the upper part of the base (101), and each table cylinder (102) is installed such that they are spaced apart from each other at a predetermined distance, and the raising and lowering of each table cylinder (102) is controlled separately.

[0020] Additionally, the ball joint (103) is characterized by comprising: a joint body (1031); a lower coupling part (1032) formed in a screw-like or socket-like manner at the lower end of the joint body (1031) so that the rod of the table cylinder (102) can be coupled; a ball catch part (1033) formed inside the joint body (1031) so that a spherical ball part (1034) can be caught to prevent detachment; and an upper coupling part (1035) formed in a plate shape at the end of a bar extending from the ball part (1034) and coupled to the lower surface of the slide table (104).

[0021] Additionally, the slide table (104) is characterized by comprising: a lower plate (1041); a gearbox (1043) installed on the lower surface of the lower plate (1041) and connected to a gear installed on a ball screw (1042) to transmit motor power; a screw jig (1044) formed protruding from the upper surface of the lower plate (1041) and supporting both ends of the ball screw (1042) with bearings so that the ball screw (1042) can rotate while both ends are fixed; a transfer part (1045) that moves in the Z-axis direction on the ball screw (1042) according to the direction of rotation when the ball screw (1042) rotates by the gear connected to the gearbox (1043); and an upper plate (1046) connected to the transfer part (1045) and configured to slide and move on the lower plate (1041) according to the movement of the transfer part (1045).

[0022] In addition, the rotary table (105) is characterized by being composed of: a rotary stage (1051) capable of calculating a rotation angle through a transfer amount per rotation using a worm gear; and a flat plate-shaped mounting part (1052) installed on the rotary stage (1051) to perform a rotation operation.

[0023] In addition, the mounting portion (1052) is characterized by having an upper surface that is treated to prevent slipping so that the mold (50) for the core can be stably positioned.

[0024] In addition, the light sensor (20) is characterized by being composed of a light-emitting part (21) composed of a plurality of light-emitting diodes (211) and a light-receiving part (22) composed of a plurality of light-receiving diodes (221).

[0025] Additionally, the optical sensor (20) is characterized by further including a processing unit capable of detecting the position coordinates of a photodiode (221) that receives the laser when a laser is irradiated onto a surface from a light-emitting unit (21).

[0026] In addition, the alignment status between the core molds is measured using the optical sensor (20) at the end of each core manufacturing cycle, and when an alignment failure is detected, the core mold positioning device (1) is raised and a notification is generated requesting the removal of the mold fixing bolt that fixes the core mold to the frame, and when the removal of the mold fixing bolt is confirmed by the optical sensor (20), the core mold positioning device (1) is operated to correct the installation position of the core mold mounted on the core mold positioning device (1), and the operation of remeasuring the alignment status of each mold using the optical sensor (20) is repeated until a predetermined standard value is satisfied. Effects of the invention

[0028] According to the present invention, when installing a core mold, coordinate movement in the X, Y, and Z axes and rotation in the A, B, and C axes are repeatedly performed until the horizontal and vertical alignment between the mold and the frame, or the bolt hole alignment, sensed by an optical sensor, reaches a preset reference value. This allows the installation position of the core mold mounted on the rotary table to be automatically set and positioned, thereby enabling even unskilled workers to easily install the core mold on the frame.

[0029] In addition, it detects misalignment caused by collisions or vibrations between core molds during the core manufacturing process, notifies the user of this, and simultaneously transfers the core mold positioning device to readjust the installation position of the removed core mold, thereby facilitating reinstallation. Brief explanation of the drawing

[0031] FIG. 1 is a perspective view of a mold positioning device for a core according to an embodiment of the present invention. FIG. 2 is a front view of a mold positioning device for a core according to an embodiment of the present invention. FIG. 3 is a side view of a mold positioning device for a core according to an embodiment of the present invention. FIG. 4 is an exploded view of a core mold positioning device according to one embodiment of the present invention. FIG. 5 is an example diagram of the installation of a mold positioning device for a core according to one embodiment of the present invention. FIG. 6 is a detailed view of the base portion of an embodiment of the present invention. FIG. 7 is a cross-sectional view of FIG. 6 of an embodiment of the present invention. FIG. 8 is a detailed view of a table cylinder of an embodiment of the present invention. FIG. 9 is a detailed view of a ball joint of an embodiment of the present invention. FIG. 10 is a cross-sectional view of FIG. 9 of an embodiment of the present invention. FIG. 11 is an exploded view of FIG. 9 of an embodiment of the present invention. FIG. 12 is a detailed view of a slide table of an embodiment of the present invention. FIG. 13 is a cross-sectional view of FIG. 12 of an embodiment of the present invention. FIG. 14 is an exploded view of FIG. 12 of an embodiment of the present invention. FIG. 15 is a detailed view of a rotary table of an embodiment of the present invention. FIG. 16 is an exploded view of FIG. 15 of an embodiment of the present invention. FIG. 17 is an example diagram of the operation of a core mold positioning device according to one embodiment of the present invention. FIG. 18 is an example diagram of the operation of a mold positioning device for a core according to one embodiment of the present invention. Specific details for implementing the invention

[0032] A mold positioning device for a core according to a preferred embodiment of the present invention will be described in detail below with reference to the attached drawings.

[0033] The terms used herein are not intended to limit the technology described in this document to specific embodiments, and it is preferable to understand that they include various modifications, equivalents, and substitutions of said embodiments.

[0034] Terms such as "first" or "second" used in describing the present invention are intended to distinguish one component from another component of a similar form, and the use of such terms does not limit the scope of the rights.

[0035] When describing the present invention, unless otherwise indicated, it is preferable to understand that the expression 'A or B' may be used selectively as either A or B, or as A and B together.

[0036] The drawings used to describe the invention may contain exaggerated or omitted parts to facilitate the easy identification of the features of the invention, and this does not limit specific embodiments of the invention.

[0037] In addition, when a specific direction (up, down, left, right, vertical, horizontal, inward, outward, etc.) is specified in the description of the present invention, it should be understood that such description is merely for the purpose of explaining specific examples to facilitate explanation and aid understanding, and does not limit or restrict a specific configuration or specific embodiment.

[0039] As illustrated in FIGS. 1 to 5, the core mold positioning device (1) of the present invention is a device that adjusts the installation position of each mold by repeatedly performing coordinate movement in the X, Y, and Z axis directions and rotation in the A, B, and C axis directions so that the position of the bolt hole drilled in the core mold and the bolt hole formed in the installation frame, measured by a light sensor (20) composed of a light-emitting part (21) and a light-receiving part (22), or the mutual horizontal and vertical alignment between the core mold and the installation frame satisfies a predetermined reference value. It is structured to be installed at the bottom of the core manufacturing device (M) and to operate while moving along a rail.

[0040] The above-described core mold positioning device (1) comprises: a base part (101) that moves in the X-axis direction along a rail installed at the bottom of the core manufacturing device (M); a table cylinder (102) installed on the upper part of the base part (101) that moves up and down in the Y-axis direction; a ball joint (103) installed at the end of the rod of the table cylinder (102) and formed to rotate in the A-axis or C-axis; a slide table (104) installed on the ball joint (103) that slides in the Z-axis direction; and a rotary table (105) installed on the upper part of the slide table (104) that rotates in the B-axis; and a detailed description of each component is provided below.

[0041] At this time, it is desirable to understand that the axial direction related details described in each component of the core mold positioning device (1) and the components of the core mold positioning device (1) described below are explained based on the axial direction of the core manufacturing device (M) unless otherwise specified. Specifically, when viewing the core manufacturing device (M) from the front, the left-right direction should be understood as the X-axis, the up-down direction as the Y-axis, and the front-back direction as the Z-axis.

[0043] As illustrated in FIGS. 6 and 7, the base part (101) may be a block-shaped configuration that moves along a rail installed at the bottom of the core manufacturing device (M), but may also be a device that is separated from the core manufacturing device (M) and configured separately as needed. In the case of configuring the device separately, a rail or guide must be installed so that it can move within a defined section, and a means of movement such as wheels must be provided so that it can move on the rail or guide.

[0044] Here, the configuration of the base part (101) is described in more detail. The base part (101) comprises: an installation block (1011) having a recessed portion of a predetermined height formed so that a table cylinder (102), to be described later, can be installed in an accurate position; and a moving part (1012) installed at the bottom of the installation block (1011), coupled to a rail formed at the bottom of the core manufacturing device (M), and moved in the X-axis direction according to the operation of the motor.

[0045] The above-mentioned installation block (1011) is configured such that at least its upper surface is formed in a plate shape, and multiple recesses are formed that are recessed to a predetermined height in the shape of the lower surface of the table cylinder (102), and multiple screw holes may be formed on the recesses for bolt connection, etc.

[0046] Additionally, the moving part (1012) moves together with the moving part (1012) and the installation block (1011) connected to the moving part (1012) in the X-axis direction according to the rotation direction of the motor that rotates the rail of the core manufacturing device (M) coupled to the moving part (1012) or directly rotates the moving part (1012).

[0047] At this time, it is most desirable to apply a precision movement method using a ball screw to the moving part (1012) to minimize backlash, but if necessary, a rack-pinion method may be applied to reduce manufacturing costs.

[0048] Here, when a ball screw method is applied as the X-axis movement method of the moving part (1012), a motor is provided to rotate a ball screw corresponding to the rail of the core manufacturing device (M), and the moving part (1012) is coupled to the ball screw and moves in the X-axis direction according to the rotation direction of the ball screw, thereby moving the install block (1011) connected to the moving part (1012) together. That is, the rail of the core manufacturing device is replaced with a ball screw, and a return tube nut coupled to the ball screw is provided on the moving part (1012) so that it can move along the axial direction of the ball screw according to the rotation direction of the ball screw.

[0049] Alternatively, when a rack-pinion method is applied as the X-axis movement method of the moving part (1012), a motor is connected to the moving part (1012) which acts as a pinion gear, and a rack gear is machined on the rail and meshed with the moving part (1012). The moving part (1012) and the rail thus mutually coupled perform X-axis movement according to the direction of operation of the motor connected to the moving part (1012).

[0050] However, when a rack-and-pinion type X-axis movement method is applied to the above-mentioned moving part (1012), since the amount of movement in the X-axis direction is dependent on the pitch of the rack, it is necessary to additionally correct the position by adjusting the position of the moving frame (M2) of the mold manufacturing device.

[0052] As illustrated in FIG. 8, the table cylinder (102) is installed on the base part (101) and is a lifting / lowering cylinder that operates with the cylinder rod (1022) facing the Y-axis direction. A plurality of them may be installed on the upper part of the base part (101), preferably installed at each corner or vertex side of the base part (101), so that at least four table cylinders are installed on the upper surface of the base part (101) and each can perform a lifting / lowering operation.

[0053] To explain the configuration of the table cylinder (102) in more detail, it comprises: a cylinder body (1021) having a fluid supply pipe on one side so that pneumatic or hydraulic pressure can be supplied; and a cylinder rod (1022) that moves back and forth by the pneumatic or hydraulic pressure supplied to the cylinder body (1021), and operates to allow the core mold positioning device (1) of the present invention to move up and down in the Y-axis direction.

[0054] Here, it is preferable that the end of the cylinder rod (1022) be machined with threads so that a ball joint (103), which will be described later, can be coupled thereto, or that a socket fitted to the lower part of the ball joint (103) be provided so that it can be easily coupled with the ball joint (103).

[0055] Additionally, it should be understood that while it is preferable for the pneumatic or hydraulic pressure supplied to each table cylinder (102) to be supplied via an individual supply pipe, the pneumatic or hydraulic pressure supplied to each table cylinder (102) may be controlled using a solenoid valve if necessary.

[0056] As described above, the table cylinders (102) installed in multiple numbers can be configured such that, even if they rise to different heights due to the configuration of the ball joint (103) to be described later, no restrictions on operation occur, thereby enabling smooth rotation of the A and C axes of the slide table (104) or the rotary table (105).

[0058] As illustrated in FIGS. 9 to 11, the ball joint (103) is configured to rotate in the A-axis or C-axis direction according to the operation of the plurality of table cylinders (102) as described above, so that the operation of the core mold (50) mounted on the rotary table (105) rotating in the A-axis or C-axis direction can be implemented, and even if only one of the plurality of table cylinders (102) is raised or lowered, the lifting or lowering operation is not restricted by the rotational operation of the ball joint (103) itself.

[0059] As an example, assuming that the table cylinder (102) is installed at the left and right corners and the front and rear corners of the base part (101), if only the table cylinder (102) installed on the front side of the base part (101) performs a lifting operation, the ball joint (103) installed on each cylinder rod (1022) rotates by a predetermined angle in the A-axis direction, thereby performing an operation that causes the slide table (104) or rotary table (105), which will be described later, to rotate in the rear direction. At this time, it is preferable that the rear table cylinder (102) performs a lowering operation by the height to which the front table cylinder (102) has risen, so that it rotates around the central axis of the slide table (104) or rotary table (105), but it is not necessarily limited to this.

[0060] In another example, assuming that the table cylinder (102) is installed at the left and right corners and the front and rear corners of the base part (101), when the lowering operation of the front table cylinder (102) and the right table cylinder (102) is performed, the ball joint (103) installed on each cylinder rod (1022) rotates by a predetermined angle in the A and C axis directions, thereby performing an operation that causes the slide table (104) or rotary table (105), which will be described later, to rotate in the front-right diagonal direction. At this time, it is preferable that the rear table cylinder (102) and the left table cylinder (102) perform a lifting operation by the height to which the front table cylinder (102) and the right table cylinder (102) have lowered, so that they rotate around the central axis of the slide table (104) or rotary table (105), but it is not necessarily limited to this.

[0061] That is, the example of rotational operation with respect to the A-axis or C-axis of the core mold positioning device (1) implemented by the combination of the table cylinder (102) and ball joint (103) described above is merely an example of operation performed under the assumption that the table cylinder (102) is installed at the left and right corners and the front and rear corners of the base part (101) in the description of the present invention. Such description should not be understood as a description that limits the invention, and it is preferable to understand that it includes various embodiments that can be derived therefrom.

[0062] Additionally, the respective components constituting the ball joint (103) are described as follows: a joint body (1031); a lower coupling part (1032) formed in a screw-like or socket-like manner at the lower end of the joint body (1031) so that the rod of the table cylinder (102) can be coupled; a ball catch part (1033) formed inside the joint body (1031) so that a spherical ball part (1034) is caught to prevent detachment; and an upper coupling part (1035) formed in a plate shape at the end of a bar extending from the ball part (1034) and coupled to the lower surface of the slide table (104).

[0063] The joint body (1031) is a housing in which the lower coupling part (1032), ball catch part (1033), and ball part (1034), which will be described later, are each provided in a space formed on the inside. The basic shape is preferably formed such that the upper and lower parts of the joint body (1031) can be separated and combined as shown in FIG. 11, but it should be understood that it is not necessarily limited to this, and can be formed in various shapes as long as a space is formed on the inside and the lower coupling part (1032), ball catch part (1033), and ball part (1034) are each provided in the formed space.

[0064] The lower coupling portion (1032) is configured to be formed on the lower side of the joint body (1031), and is configured such that a screw or socket is machined into a recessed portion that is recessed by a predetermined height from the lower surface of the joint body (1031), thereby allowing the cylinder rod (1022) of the table cylinder (102) to be coupled to each other. If necessary, it is preferable to understand that the lower coupling portion (1032) is formed by forming a pinhole that penetrates the cylinder rod (1022) and the joint body (1031) in the same line and then installing a pin in the pinhole.

[0065] The ball catch portion (1033) is configured to be formed on the inner side of the joint body (1031), and consists of a spherical space into which a ball portion (1034), to be described later, is fitted, and an inclined portion having a sink formed at a predetermined angle on the inlet side of the ball catch portion (1033) located on the upper surface of the joint body (1031) so as to limit the rotation angle of a bar extending from the ball portion (1034) so ​​that rotational movement about the A-axis or C-axis can be performed only within a predetermined range.

[0066] The ball portion (1034) is configured to include a bar formed by extending from one side of the ball portion (1034) which has a spherical shape. When the ball portion (1034) is positioned in the ball catch portion (1033) and the table cylinder (102) is raised or lowered, the ball portion (1034) rotates in the A-axis or C-axis direction, and the bar rotates together with the ball portion (1034) in the A-axis or C-axis direction, causing the upper coupling portion (1035) connected to the bar to rotate together in the corresponding direction.

[0067] That is, so that the ball portion (1034) can be positioned inside the ball catch portion (1033), the joint body (1031) is formed with an arbitrary horizontal plane based on the center point of the ball catch portion (1033) and horizontal to the lower surface of the joint body (1031), and is configured so that the upper and lower separation and connection of the joint body (1031) are possible based on the arbitrary horizontal plane.

[0068] The upper coupling part (1035) is configured as a plate-shaped structure formed perpendicularly to the bar, and is fastened to the lower surface of the slide table (104) to be described later using a coupling means such as a bolt, so that the upward and downward movement of the table cylinder (102) in the Y-axis direction and the rotational movement of the ball part (1034) in the A-axis or C-axis are transmitted to the slide table (104).

[0070] As illustrated in FIGS. 12 to 14, the slide table (104) comprises: a lower plate portion (1041) connected to the rod of a table cylinder (102) by the ball joint (103); a ball screw portion (1042) installed on the lower plate portion (1041) and performing Z-axis movement while being rotated by a motor; a gearbox (1043) installed on the lower surface of the lower plate portion (1041) and connected to a gear installed on the ball screw portion (1042) to transmit motor power; and a screw jig (1044) formed protruding from the upper surface of the lower plate portion (1041) and supporting both ends of the ball screw portion (1042) with bearings so that both ends of the ball screw portion (1042) can rotate while fixed. It comprises: a transfer part (1045) that moves in the Z-axis direction on the ball screw part (1042) according to the direction of rotation when the ball screw part (1042) is rotated by a gear connected to the gearbox (1043); and an upper plate part (1046) that is connected to the transfer part (1045) and configured to move in the Z-axis direction while sliding on the lower plate part (1041) according to the movement of the transfer part (1045).

[0071] At this time, it is preferable that the motor for rotating the ball screw portion (1042) be installed inside the gearbox (1043) installed on the lower surface side of the lower plate portion (1041), so that the gear installed on the motor shaft and the gear installed on one side of the ball screw portion (1042) installed on the upper surface of the lower plate portion (1041) mesh with each other to rotate. This is to enable Z-axis movement by configuring the slide table (104) and the motor to rotate together even if the slide table (104) rotates in the A-axis or C-axis direction by the table cylinder (102) and the ball joint (103).

[0072] To explain in more detail each component forming the slide table (104), the lower plate (1041) is configured to be coupled to the upper coupling part (1035), so that the gearbox (1043) and screw jig (1044), which will be described later, are each directly installed, and the ball screw part (1042), transfer part (1045), and upper plate (1046), which will be described later, are indirectly supported and installed by other components.

[0073] At this time, it is preferable that a guide portion recessed by a predetermined height from the upper surface of the lower plate portion (1041) be formed so that the ball screw portion (1042) rotates and the transfer portion (1045) moves smoothly, and it is preferable that a protrusion that engages with this guide portion be formed on the lower surface of the transfer portion (1045) so that they engage and operate together.

[0074] Additionally, the ball screw portion (1042) is configured to perform rolling motion by means of a ball, and is configured to convert the rotational force of a motor into linear motion so that a transfer portion (1045) attached to the ball screw portion (1042) moves along the axial direction according to rotation.

[0075] At this time, both ends of the ball screw portion (1042) are fixed by a screw jig (1044) to be described later, and a gear that meshes with a gearbox (1043) to be described later is installed on one side of the ball screw portion (1042) so that it receives rotational force from a motor installed in the gearbox (1043) and rotates.

[0076] Additionally, the gearbox (1043) is a housing installed on the lower surface of the lower plate (1041), and includes a motor and a gear installed at the end of the motor shaft inside, and the gear installed at the end of the motor shaft operates by engaging with the gear installed in the ball screw (1042) through a groove extending to the upper surface of the lower plate.

[0077] In addition, the screw jig (1044) is formed to protrude from the upper surface of the lower plate (1041), and is configured to have a bearing installed therein so that the ball screw (1042) can rotate while fixing and supporting both ends of the ball screw (1042).

[0078] Additionally, the above transfer unit (1045) is configured to be connected to the upper plate unit (1046) described later, and includes a return tube nut that is fastened to the ball screw unit (1042) and performs linear motion as the ball screw unit (1042) rotates.

[0079] In addition, the upper plate (1046) is connected to the transfer unit (1045) and is configured to move together as the transfer unit (1045) moves. It is preferable that the upper plate (1046) be formed in a flat plate shape so that the rotating table (105), which will be described later, can be stably installed.

[0081] As illustrated in FIGS. 15 and 16, the rotary table (105) is installed on the upper plate of the slide table (104) in a configuration where a core mold (50) is mounted. At this time, it is preferable that the rotary table (105) be composed of a rotary stage (1051) capable of calculating the rotation angle through the amount of feed per rotation using a worm gear, and a flat plate-shaped mounting part (1052) installed on the rotary stage (1051) to perform rotational operation, so that the amount of rotation can be precisely controlled.

[0082] More specifically, the rotating stage (1051) is of a type that can calculate the rotation angle through the amount of feed per rotation using a worm gear, and the mounting part (1052) is configured as a flat plate, such as a circular plate or a polygonal plate, and is preferably fastened to the rotating part using a bolt so that it can rotate in conjunction with the operation of the rotating part of the rotating stage (1051), or has a locking part of a predetermined size formed so that it is mutually locked to the rotating part.

[0083] Additionally, the rotary table (105) may be configured with a detachable fixing pin on the upper surface of the mounting portion (1052) to fix the position of the core mold (50) so as to prevent the core mold (50) mounted on the upper part of the rotary table (105) from falling off the mounting portion (1052) of the rotary table (105) due to the operation of the table cylinder (102), slide table (104), and rotary table (105). This fixing pin can be inserted into a pin hole drilled on the rotary table (105) to support and fix the side of the core mold (50).

[0084] Here, the fixing pin and pin hole may be configured in other forms, and it should be understood that any means of fixing the core mold (50) is possible, but the direction in contact with the fixed frame (M1) or the movable frame (M2) side must be kept open to prevent interference with the connection between the core mold (50) and the fixed frame (M1) or the movable frame (M2).

[0085] In addition, the mounting portion (1052) of the rotary table (105) may have an upper surface treated with an anti-slip surface so as to stably mount the mold (50) for the core.

[0086] At this time, the anti-slip treatment applied to the mounting part (1052) is preferably to use a flat rubber pad so that the balance of the core mold (50) mounted on the mounting part (1052) can be stably maintained. Anti-slip treatment using irregularities or patterns should be avoided as it may cause problems such as tilting of the mounted core mold (50). However, if anti-slip treatment using irregularities or patterns must be applied as necessary, the mutual spacing between irregularities or the width of the grooves in the pattern should be minimized to prevent the corners of the core mold (50) from getting caught between irregularities and adjacent irregularities or in the grooves of the pattern.

[0087] In addition, the core mold positioning device (1) configured as described above may be configured as a single unit in the core manufacturing device (M), but preferably, one is provided on each side of the fixed frame (M1) and the movable frame (M2) of the core manufacturing device (M), so that the operation of positioning the front mold (51) on the fixed frame (M1) and the operation of positioning the rear mold (52) on the movable frame (M2) are performed simultaneously, thereby allowing the alignment status to be confirmed by the optical sensor (20).

[0089] As illustrated in FIG. 5, the light sensor (20) is composed of a light-emitting part (21) composed of a plurality of light-emitting diodes (211) and a light-receiving part (22) composed of a plurality of light-receiving diodes (221), and further includes a processing part capable of detecting the position coordinates of the light-receiving diode (221) that received the laser when a laser is irradiated onto a surface from the light-emitting part (21).

[0090] Here, the processing unit is configured to read the frequency of a laser beam irradiated from a light-emitting diode (211) and received by a light-receiving diode (221), and to detect the coordinates of the light-receiving diode (221) at the location where the laser beam was received. Specific embodiments are described below.

[0091] As an example, the above-mentioned optical sensor (20) may be configured by installing a polarizing lens or a polarizing film on the light-emitting part (21) side to read the frequency of the laser received by each light-receiving part (22) according to the coordinates of the photodiode (221), thereby detecting the distortion of the core manufacturing device (M) itself, the defect in the installation state of the optical sensor (20), and the distortion between each core mold and each frame.

[0092] Specifically, a polarizing lens or polarizing film that allows only a laser of a specific frequency to pass through is installed for each light-emitting diode (211) at mutually spaced arbitrary coordinates. When a laser emitted from a light-emitting diode (211) of a light-emitting unit (21) is converted into a laser of a specific frequency by the polarizing lens (or polarizing film) and reaches a light-receiving unit (22), the processing unit reads the frequency received by the light-receiving unit (22) and can determine which position of the light-emitting diode (211) in the light-emitting unit (21) emitted the laser. Through this, misalignment between the fixed frame (M1) and the movable frame (M2) of the core manufacturing device (M), or defects in the installation state of the optical sensor (20), can also be detected.

[0093] In addition, by applying a polarizing lens (or polarizing film) to the light-emitting part (21) as described above, when the light-receiving part (22) receives a laser of a specific frequency, it is possible to accurately detect where the bolt hole (M101, M201, 511, 521) is located at a specific coordinate.

[0094] To do this, when a polarizing lens (or polarizing film) is installed on the side of the light-emitting unit (21), a polarizing lens (or polarizing film) is installed on each of the light-emitting diodes (211) of the light-emitting unit (21) that are located at each vertex of the light-emitting unit (21) and have the coordinates “0,0”, “Z,0”, “0,Y”, and “Z,Y”, respectively, to check the alignment state between the light-emitting unit (21) and the light-receiving unit (22). Afterwards, by applying a polarizing lens (or polarizing film) to the light-emitting diodes (211) at arbitrary coordinates, the frequency of the laser received by the light-receiving unit (22) is read, and the position of the accurate bolt hole (M101, M201, 511, 521) can be detected.

[0095] In this case, the use of a polarizing lens or a polarizing film in the present invention is limited to an embodiment in which it is achieved through a single laser oscillator. Since the objective of the present invention can be achieved without necessarily using a polarizing lens (or polarizing film) when multiple laser oscillators having different frequencies are used, an embodiment using multiple laser oscillators having different frequencies is also considered to be within the scope of protection attainable through variations of the present invention.

[0096] In addition, the laser irradiated from each light-emitting diode (211) used in the present invention is preferably irradiated through an oscillator that emits a laser in the infrared region having straightness, but is not necessarily limited thereto.

[0098] In addition, the mold positioning table (1) of the present invention is configured to measure the alignment status between the front mold (51) and the rear mold (52) in real time using the optical sensor (20), and if an alignment failure is detected, stop the core manufacturing process, correct the installation position of each mold (51, 52) through the operation of each component (101, 102, 103, 104, 105) of the mold positioning device (1) for the core, and then remeasure the alignment status of each mold (51, 52) using the optical sensor (20). If the predetermined standard value is satisfied, a notification is generated to install the mold fixing bolt, and when the installation of each mold (51, 52) is completed by the mold fixing bolt, the core manufacturing process is resumed.

[0099] Specifically, the core mold positioning device (1) of the present invention uses a light sensor (20) to emit a laser from a light-emitting diode (211) for a predetermined time, per cycle of the core manufacturing process, or in real time for the front mold (51) and rear mold (52) initially installed on the fixed frame (M1) and the moving frame (M2), and repeatedly performs the operation of receiving the laser through a light receiving unit (22).

[0100] At this time, since the bolt holes (M101, M201, 511, 521) are covered by the mold fixing bolts, the vertical and horizontal alignment between one frame and one mold installed on that frame, or the vertical and horizontal alignment between the front mold (51) installed on one frame and the rear mold (52) installed on another frame is measured.

[0101] If any of the core molds (50) are misaligned, some of the lasers that should be received by the light receiving unit (22) are reflected off the molds, etc., due to the misalignment of the core mold (50) and cannot be received. Therefore, if the processing unit detects that the laser receiving shape transmitted from the light receiving unit (22) is different from the laser receiving shape determined to be in the existing alignment state, it determines this as a misalignment state.

[0102] Specifically, this can be verified through coordinate comparison. In a processing unit configured such that the receiving diode (221) at the position where the laser emitted from the light-emitting diode (211) is received has a result value of “1” and the receiving diode (221) at the position where the laser is not received has a result value of “0”, if the laser reception pattern on the upper surface side of the core mold (50) determined to be in an existing alignment state has a shape like “1-1-1-1-1” from left to right, and if the laser reception pattern re-measured by the light sensor (20) is confirmed to be a shape like “1-0-1-1-1”, then it is determined that one of the core molds (50) is twisted and the left side is raised relative to the front of the core mold (50) (i.e., an alignment failure state).

[0103] As illustrated in FIGS. 17 and 18, when a core mold positioning device (1) operating in the manner described above determines a misalignment state in the processing unit, it stops the core manufacturing process being performed by the core manufacturing device (M) and moves the core mold positioning device (1) to mount the front mold (51) and the rear mold (52) respectively.

[0104] Afterward, when it is confirmed that the front mold (51) and the rear mold (52) have been installed by the optical sensor (20) or the pressure sensor installed in the mold positioning device (1) for the core, a notification for the separation of the mold fixing bolt is output, and the installation position correction of the mold (50) for the core is performed by the optical sensor (20) and the mold positioning device (1) for the core.

[0105] When a light reception pattern having the same shape as “1-1-1-1-1”, which is the laser reception pattern determined to be the existing alignment state during the process of correcting the installation position of the core mold (50) by the light sensor (20) and the core mold positioning device (1), is read and detected by the processing unit, the operation of the core mold positioning device (1) is stopped to fix the current position, and a notification is generated requesting the installation of the mold fixing bolt.

[0106] Afterward, when the installation of the core mold (50) is completed by the mold fixing bolt, the core mold positioning device (1) is restored to a previously designated position, and a notification is transmitted or generated to the user indicating that the core manufacturing process set in the core manufacturing device (M) can be performed, and the core manufacturing process is resumed.

[0107] In this case, when generating a notification to the user, it is advisable to understand that this can be done through methods such as illuminating an LED signal or playing a recorded sound.

[0109] The above description is based on the drawings of the present invention, but is not limited to the parts described based on the drawings. Various modifications can be made within the scope of the gist of the present invention in the technical field to which the present invention belongs, without departing from the parts described based on the drawings. Explanation of the symbols

[0111] 1: Core mold positioning device 101 : Base section 102 : Table cylinder 103 : Ball joint 104 : Slide Table 105 : Rotating table 20 : Optical sensor 21 : Light-emitting part 211 : Light Emitting Diode 22 : Light receiving unit 221 : Photodiode 50 : Mold for core 51 : Front mold 511 : Bolt hole 52 : Rear mold 521 : Bolt hole M: Core manufacturing device M1 : Fixed frame M101: Bolt hole M2 : Moving Frame M201: Bolt hole

Claims

Claim 1 A core mold positioning device characterized by adjusting the installation position of each mold by repeatedly performing coordinate movement in the X, Y, and Z axis directions and rotation in the A, B, and C axis directions so that the position of the bolt hole drilled in the core mold and the bolt hole formed in the installation frame, measured by a light sensor (20) composed of a light-emitting part (21) and a light-receiving part (22), is on a single axis, or the mutual horizontal and vertical alignment between the core mold and the installation frame satisfies a predetermined reference value. Claim 2 In claim 1, the core mold positioning device (1) is characterized by comprising: a base part (101) that moves along a rail installed at the bottom of a core manufacturing device (M) in the X-axis direction; a table cylinder (102) installed on the upper part of the base part (101) and moved up and down in the Y-axis direction; a ball joint (103) installed at the end of the rod of the table cylinder (102) and formed to rotate in the A-axis or C-axis; a slide table (104) installed on the ball joint (103) and slidably moved in the Z-axis direction; and a rotary table (105) installed on the upper part of the slide table (104) and rotated in the B-axis direction. Claim 3 A mold positioning device for a core according to claim 2, wherein the table cylinders (102) are installed in multiple numbers on the upper part of the base portion (101), each table cylinder (102) is installed such that they are spaced apart from each other at a predetermined distance, and the raising and lowering of each table cylinder (102) is controlled separately. Claim 4 In paragraph 2, the ball joint (103) is characterized by comprising: a joint body (1031); a lower coupling part (1032) formed in a screw-like or socket-like manner at the lower end of the joint body (1031) so that the rod of the table cylinder (102) can be coupled; a ball catch part (1033) formed inside the joint body (1031) so that a spherical ball part (1034) can be caught to prevent detachment; and an upper coupling part (1035) formed in a plate shape at the end of a bar extending from the ball part (1034) and coupled to the lower surface of the slide table (104). Claim 5 In paragraph 2, the slide table (104) comprises: a lower plate portion (1041); a gearbox (1043) installed on the lower surface of the lower plate portion (1041) and connected to a gear installed on a ball screw portion (1042) to transmit motor power; a screw jig (1044) formed protruding from the upper surface of the lower plate portion (1041) and supporting both ends of the ball screw portion (1042) with bearings so that both ends of the ball screw portion (1042) can rotate while fixed; and a transfer portion (1045) that moves in the Z-axis direction on the ball screw portion (1042) according to the direction of rotation when the ball screw portion (1042) rotates by means of a gear connected to the gearbox (1043). A mold positioning device for a core, characterized by comprising: an upper plate (1046) connected to a transfer unit (1045) and configured to slide and move on the lower plate (1041) as the transfer unit (1045) moves. Claim 6 A mold positioning device for a core according to claim 2, wherein the rotary table (105) comprises: a rotary stage (1051) capable of calculating a rotation angle through a transfer amount per rotation using a worm gear; and a flat plate-shaped mounting part (1052) installed on the rotary stage (1051) to perform a rotational operation. Claim 7 In claim 6, the above-mentioned mounting part (1052) is characterized by having an upper surface that is treated to prevent slippage so that the core mold (50) can be stably positioned, forming a core mold positioning device. Claim 8 A mold positioning device for a core according to claim 1, wherein the optical sensor (20) is composed of a light-emitting part (21) composed of a plurality of light-emitting diodes (211) and a light-receiving part (22) composed of a plurality of light-receiving diodes (221). Claim 9 A mold positioning device for a core, characterized in that, in claim 8, the optical sensor (20) further includes a processing unit capable of detecting the position coordinates of a photodetector (221) that receives the laser when a laser is irradiated onto a surface from a light-emitting unit (21). Claim 10 A core mold positioning device according to claim 9, wherein the alignment state between core molds is measured at the end of each core manufacturing cycle using the optical sensor (20), and when a non-alignment state is detected, the core mold positioning device (1) is raised and a notification is generated requesting the removal of the mold fixing bolt that fixes the core mold to the frame, and when the removal of the mold fixing bolt is confirmed by the optical sensor (20), the core mold positioning device (1) is operated to correct the installation position of the core mold mounted on the core mold positioning device (1), and the operation of remeasuring the alignment state of each mold using the optical sensor (20) is repeated until a predetermined reference value is satisfied.

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