JP4341021B2 - Pattern plate reuse method and frameless mold making machine - Google Patents

Description

  The present invention relates to a method of reusing a pattern plate having a pattern only on one surface and a frameless mold making machine.

Conventionally, an automatic or semi-automatic Jolt type molding machine, a squeeze type molding machine, a vertical blow / squeeze type frameless molding machine, etc., use a pattern plate exclusively for one frame (see, for example, Patent Document 1).
When updating a molding machine that can use only these single-frame pattern plates, it is normal to update to a molding machine that can use only the single-frame pattern plate before the update in order to minimize the cost of pattern modification. is there.
However, a molding machine that can use only a single-frame pattern plate has a slow molding speed and often requires a large molding line.
Therefore, a method of reusing a single-frame pattern plate that has a high molding speed and a compact molding line has been awaited.

Noto-2540250, Fig. 1

  The present invention has been made in view of the above technical background, and an object thereof is to provide a method of reusing a single-frame pattern plate and a frameless mold making machine used therefor.

In order to achieve the above object, the method of reusing a pattern plate in the present invention is a method of reusing a pattern plate having a pattern only on one side, and is a pattern plate dedicated to the upper casting frame and a pattern plate dedicated to the lower casting frame. It has the process of manufacturing a match plate by making the back surfaces of a pattern plate face each other, and using the match plate in a frameless mold making machine.

On the other hand, in order to achieve the above object, the frameless mold making machine used in the method of reusing a pattern plate according to the present invention holds a match plate between two casting frames arranged so that the end openings are opposed to each other. At the same time, a squeeze plate is fitted to the other end openings of the two casting frames to define two pairs of mold making spaces, and the two pieces arranged opposite to each other in the pair of mold making spaces In a frameless mold making machine that fills casting sand with air through a sand supply port provided on the peripheral wall of the casting frame and compresses the casting sand with the squeeze plate to form two molds,
The driving means for moving at least one casting frame itself according to the thickness of the match plate, and the position of the sand supply port provided on the peripheral wall of the casting frame are moved and adjusted to the position of the moved sand supply port. Driving means for moving at least one hopper or hopper nozzle.

In the present invention, the pattern plate dedicated to one frame refers to a pattern plate provided with a pattern only on one surface dedicated to the upper or lower casting frame. The match plate is a pattern plate having a plate-like member in which a model divided into an upper die and a lower die by a parting surface is attached to the upper surface and the lower surface. The pattern plate may be made of wood, iron-based metal, aluminum-based metal, or composite material.

In the present invention, the frameless mold molding machine refers to a molding machine that molds a mold to be poured after the metal frame at the time of molding is pulled out from the molded mold. Moreover, green sand is used for the foundry sand used for the mold.

According to the present invention, the pattern plate dedicated for one frame is used in one match plate type frameless mold making machine, so that the molding speed is fast and the molding line is compact.
Further, in the method of reusing a pattern plate in the present invention, even when the thickness of the match plate is changed, by moving a pair of cylindrical frame-shaped casting frames themselves in the direction of the match plate, The match plates having different thicknesses can be used by moving the position of the sand supply port provided on the peripheral wall of the casting frame and moving the hopper nozzle in accordance with the position of the moved sand supply port. According to the configuration of the present invention, even when the thickness of the single-frame pattern plate is different, molding can be performed with the same molding machine.

Here, in the method for reusing a pattern plate in the present invention, the plate-like members that are combined with the back surfaces of the pattern plate dedicated to the upper casting frame and the pattern plate dedicated to the lower casting frame facing each other, You may make it contact and combine.
Moreover, in the reuse method of the pattern plate in this invention, the plate-shaped member which combined the pattern plate for exclusive use of the upper casting frame and the pattern plate for exclusive use of the lower casting frame facing each other has a space in the center. In this space, the bottom surfaces of the pattern plates may be combined with each other, and a vent hole may be provided from the bottom surface to the pattern side.
In the method of reusing a pattern plate in the present invention, the single-frame pattern plate used in a plurality of molding machines may be used in one match plate type molding machine. By doing in this way, a molding machine can also be reduced, productivity becomes high and it leads also to energy saving.

Further, in the method for reusing a pattern plate in the present invention, the molding machine holds the match plate between two casting frames arranged so that one end openings are opposed to each other and opens the other ends of the two casting frames. A pair of mold making spaces is defined by fitting squeeze plates to the sections, and through sand supply ports provided in the two peripheral walls of the casting frame disposed opposite to each other in the pair of mold making spaces. It is possible to provide a frameless mold making machine that fills the foundry sand with air and compresses the foundry sand with the squeeze plate to form two molds. The frameless mold making machine that can use such a match plate has the advantages of a high molding speed and a compact molding line.

The frameless mold making machine according to the present invention may further include a thickness measuring means for measuring the thickness of the match plate. According to this configuration, the match plate can be reused more reliably.
Furthermore, the frameless mold making machine according to the present invention may have a plurality of hoppers, and each of the hoppers may be provided with a driving means. According to the present invention, the mold can be formed under different conditions, upper and lower, and conditions close to those of the single-frame dedicated pattern plate can be realized. In addition, the frameless mold making machine according to the present invention may have a single hopper, and may further include a plurality of movable hopper nozzles and driving means for the hopper nozzles below the hopper.

Further, in the pattern plate reuse method according to the present invention and the frameless mold making machine according to the present invention, the squeeze plate is composed of a plurality of squeeze feet, and each squeeze foot is individually put in and out by a driving method such as a cylinder. A possible configuration may be made.

An embodiment of a method for reusing a pattern plate to which the present invention is applied will be described with reference to FIGS. 10, 11 and 12. FIG.
As shown in FIG. 10, the match plate 101 used in the frameless mold making machine is composed of a pattern plate 102 dedicated to the upper casting frame used in the frame molding machine and a pattern plate 103 dedicated to the lower casting frame. Is done. The match plates 101 are used by combining the back surfaces of the pattern plates 102 and 103 to face each other.
The fastening method of the pattern plates 102 and 103 is generally a bolt fastening method, but the method is not limited, such as fitting by a combination of grooves, fastening by a hinge, fastening by a cracker.

As shown in FIG. 11, after creating the engraving on the back surface of the pattern plate 102 dedicated to the upper casting frame and the pattern plate 103 dedicated to the lower casting frame, by combining the back surfaces of the pattern plates 102 and 103 to face each other, This is an example used as a match plate 101.
A space 104 is provided in the center of the match plate 101 by creating and combining engravings on the back surfaces of the pattern plates 102 and 103. From this space 104, a vent hole 105 communicating with the pattern side of the pattern plates 102 and 103 is opened, and a vent plug 106 is driven into the pattern side surface of the vent hole 105.
A communication hole 107 communicating from the space 104 to the outside is formed in the peripheral wall of the match plate 101.

FIG. 12 shows a case where the match plate 101 is incorporated in a molding apparatus to which the present invention shown in FIG. 1 is applied.
The match plate 101 is sandwiched between upper and lower casting frames 2 and 3 each having a sand blowing port on a peripheral wall, and the upper and lower casting frames 2 and 3 have upper and lower openings at respective openings where the match plate 101 is not present. Squeeze plates 6 and 7 are provided so as to be able to enter and exit, respectively.

One embodiment of a frameless mold making machine to which the present invention is applied will be described in detail with reference to FIGS. As shown in FIGS. 1 to 3, the frameless mold making machine includes two pairs of upper and lower casting frames each having a rectangular parallelepiped machine base 1 having a space formed therein and a sand blowing port on a peripheral wall. 2, 3, 2, and 3; between these two pairs of upper and lower casting frames 2, 3, 2, 3, between the pair of upper and lower casting frames 2, 3, the loading / unloading mechanism 4 can be inserted and removed A match plate 5 having the same structure as the match plate 101 provided; the match plate 5 is sandwiched between the pair of upper and lower casting frames 2 and 3; Upper and lower squeeze plates 6 and 7 are provided in respective openings where the match plate 5 is not provided so as to be able to enter and exit, and the pair of upper and lower casting frames 2 and 3 holding the match plate 5 are in a vertical state. A vertical plane centering on the support shaft 8 provided on the machine base 1 between the position to be horizontal and the position to be horizontal A foundry sand squeeze mechanism 9 supported so as to be able to rotate in the forward and reverse directions; a lateral cylinder 10 as a rotational drive mechanism for rotating the foundry sand squeeze mechanism 9 forward and backward; A sand blowing mechanism 11 having a mechanism capable of moving the position of the hopper nozzle relative to the position of the sand blowing port with respect to the pair of upper and lower casting frames 2 and 3, and for blowing casting sand from the sand blowing port; A mold extraction mechanism 12 for extracting the upper and lower molds from the pair of upper and lower casting frames 2 and 3 in the upper and lower molds which are superimposed and in a horizontal state; and the pair of upper and lower casting frames Between the casting sand squeeze mechanism 9 and the mold extraction mechanism 12 in which 2 and 3 are in a horizontal state, two pairs of the upper and lower casting frames 2 and 3 in a horizontal state are arranged in a row continuously in pairs. Alternately and intermittently swivel and forward The the cope flask 2 hooking to a vertically movable molding flask turning mechanism 13; are constituted by.

In each of the upper and lower casting frames 2, 3 of the two pairs of upper and lower casting frames 2, 3, 2, 3, as shown in FIG. The lower casting frame 3 is slidably mounted between the pair of connecting rods 14, 14, and the lower casting frame 3 is hooked at the lower end position of the pair of connecting rods 14, 14. In addition, the protrusions 2a, 2a, 3a, and the right side of the front and rear outer surfaces of the lower casting frame 3 when located at the center of the front and rear outer surfaces of the upper casting frame 2 and the position of the casting sand squeeze mechanism 9 side, 3a is provided.

Further, as shown in FIG. 1, the carry-in / out mechanism 4 for the match plate 5 is pivotally supported by a ring member 15 that is mounted around the support shaft 8 of the foundry sand squeeze mechanism 9 and the sand blowing mechanism 11. And a cylinder 16 having a piston rod tip rotatably connected to a part of the ring member 15, a pair of cantilevered arms 17, 17 whose base ends are fixed to the ring member 15, and the match plate And a pair of hanging trolleys 45 that can reciprocate in the left and right directions, and the pair of arms 17 and 17 are rotated up and down by the expansion and contraction operation of the cylinder 16 so that the trolley 45 can carry in and out the match plate 5 between the pair of upper and lower casting frames 2 and 3 in the horizontal state in the foundry squeeze mechanism 9 via rails 46, 47 and 47 which will be described later. Like (See FIGS. 5 to 7). Further, the pair of arms 17 and 17 are rotated up and down by the expansion and contraction operation of the cylinder 16 while lowering the carriage 45 through the upper casting frame 2 for a short required length, whereby the arms 17 and 17 are moved to the carriage 45. Can be connected to each other and the connected state can be solved.

Further, by adding a thickness measuring means (not shown) for measuring the thickness of the match plate 5, even if the match plates having different thicknesses are carried in, the sand blowing ports of the upper and lower casting frames 2 and 3 are provided. Since the position can be specified in advance, the position of the hopper nozzle of the sand blowing mechanism 11 can be reliably moved.

Further, in the foundry sand squeeze mechanism 9, as shown in FIG. 1, the rotating frame 18 rotates forward and backward in a vertical plane near the center on the support shaft 8 mounted at the upper center of the machine base 1. A pair of guide rods 19, 19 extending in the vertical direction are mounted on the right side surface of the rotating frame 18 at a predetermined interval in the front-rear direction. An inverted L-shaped upper lifting frame 20 is formed at the upper part between the pair of guide rods 19, 19, and an L-shaped lower lifting frame 21 is formed at the lower part between the pair of guide rods 19, 19. The upper and lower elevating frames 20 and 21 are slidably mounted via respective holder portions, and the upper and lower elevating frames 20 and 21 are mutually connected by the expansion and contraction operation of the upward cylinder 22 and the downward cylinder 23 mounted on the rotary frame 18. It approaches and separates. The rotating frame 18 is provided with a rail 46 for guiding the carriage 45 when the pair of upper and lower casting frames 2 and 3 are in a horizontal state. Further, each of the upper casting frames 2 and 2 is provided with a guide rail 47 of the carriage 45 whose transport level is the same as that of the rail 46 when they are raised (see FIGS. 5 to 7). ).

The upper elevating frame 20 has a plurality of cylinders 24, 24 for moving the upper squeeze plate 6 back and forth, and the lower elevating frame 21 has a plurality of cylinders 25, 25 for moving the lower squeeze plate 7 back and forth. It is attached. Further, the horizontal upper surfaces of the upper and lower elevating frames 20 and 21 have a size capable of pushing the upper and lower casting frames 2 and 3 respectively.

The sand filling mechanism 11 is mounted on the left side of the ceiling portion of the machine base 1 and is composed of two hoppers 27 and 27. Independently, the foundry sand is filled with low pressure compressed air pressure (aeration filling). The pressure of the low-pressure compressed air is preferably 0.05 MPa to 0.18 MPa. Further, it is possible to use a pressure lower than the atmospheric pressure by connecting to a decompression source (not shown). Further, the hoppers 27 and 27 can be filled at the same time or under the same control without being independently filled.

FIG. 8 includes a cylinder 50 that is a driving means for independently driving the hoppers 27a and 27a. Hopper nozzles 27b, 27b provided at the lower ends of the hoppers 27a, 27a and the hoppers 27a, 27a and in contact with the sand supply ports provided on the peripheral walls of the upper and lower casting frames 2, 3 are connected to the match plate by the cylinder 50. 5 can be moved according to the position of the sand supply port provided on the peripheral walls of the upper and lower casting frames 2 and 3 due to the change in thickness.

Further, in the mold extraction mechanism 12, an extraction plate 28 that can enter the upper and lower casting frames 2, 3 that are in a horizontal state overlapped vertically is provided with a downward cylinder 29 attached to the ceiling portion of the machine base 1. The extraction plate 28 is fixed to the lower end of the piston lot, and is moved up and down by the expansion and contraction operation of the cylinder 29. A mold receiving table 30 for receiving the upper and lower molds extracted from the upper and lower casting frames 2 and 3 is disposed directly below the extraction plate 28 so as to be movable up and down. The panda graph 32 that expands and contracts by the expansion and contraction operation of the head is moved up and down. By using this panda graph 32, there is no need to provide pits (see FIG. 2).

Further, in the casting frame turning mechanism 13, a rotary shaft 33 oriented in the vertical direction is mounted on the machine base 1 so as to be horizontally rotatable, and the upper end of the rotary shaft 33 is attached to the ceiling of the machine base 1. The output shaft of the mounted motor 34 is connected, and the rotating shaft 33 is rotated forward and reverse by 180 degrees by driving the motor 34. A support member 35 is mounted on the rotating shaft 33, and two pairs of guide rods 36, 36 extending downward and forming a pair at a predetermined interval in the front-rear direction are suspended on the support member 35. These two pairs of guide rods 36 and 36 are opposed to the left and right with the rotary shaft 33 as the center. Further, an upper hooking member 37 capable of hooking the protrusions 2a, 2a of the upper casting frame 2 is slidably mounted on each pair of the two pairs of guide rods 36, 36. In addition, the tip of the piston lot of the upward cylinder 38 attached to the rotary shaft 33 is fixed to each upper latch member 37, and each upper latch member 37 is moved up and down by the expansion and contraction operation of the cylinder 38. ing. Further, a lower latching member 39 capable of latching the projections 3a, 3a of the two lower cast frames 3, 3 is fixed to the lower ends of the two pairs of guide rods 36, 36.
Reference numeral 40 in the figure denotes a mold discharge device for extracting the upper and lower molds extracted from the upper and lower casting frames 2 and 3 from the mold receiving table 30.

Next, a procedure for forming the upper and lower molds without the casting frame from the state shown in FIG. 1 using the frameless mold making machine configured as described above will be described. First, the cylinder 16 of the loading / unloading mechanism 4 is extended and the match plate 5 is loaded between the pair of upper and lower casting frames 2 and 3 in a horizontal state by the pair of arms 17 and 17. The pair of arms 17, 17 are rotated clockwise by the contraction operation of the cylinder 16 of the loading / unloading mechanism 4 while the upper casting frame 2 is moved up and down by a short length by the expansion / contraction operation of the pair of arms 17, The connection state of 17 to the carriage 45 is released and the arms 17 and 17 are returned to their original positions.

Next, the upper and lower casting frames 2 and 3 are brought close to each other via the upper and lower lifting frames 20 and 21 by the contraction operation of the upward cylinder 22 and the downward cylinder 23 of the foundry sand squeeze mechanism 9. While holding the match plate 5 between 2 and 3, the cylinders 24, 24, 25 and 25 of the foundry sand squeeze mechanism 10 are operated to extend the required lengths to move the upper squeeze plate 6 and the lower squeeze plate 7 up and down. While inserting the required length into the casting frames 2 and 3 to define two upper and lower molding spaces, the cylinder 10 is extended to move the foundry sand squeeze mechanism 9 about the support shaft 8 in the clockwise direction. And the pair of upper and lower casting frames 2 and 3 and the match plate 5 are brought into a vertical state, the sand blowing port is moved upward, and the two hoppers 27 and 27 of the sand blowing mechanism 11 are further moved. At the bottom of Sand blowing port is allowed to contact each (see FIG. 4).

Then, the sand blowing mechanism 11 blows and fills the molding sand into the two upper and lower molding spaces from the sand blowing port, and then the pair of upper and lower casting frames 2 and 3 and the match plate 5 are horizontally placed. While returning to the state, the upper and lower squeeze plates 6 and 7 are further entered to squeeze the foundry sand in the upper and lower molding spaces. Then, the upward and downward cylinders 22 and 23 are extended to separate the upper and lower lifting frames 20 and 21 from each other.

Next, the cylinder 38 of the casting frame turning mechanism 13 is extended to lift the upper casting frame 2 containing the mold formed by squeezing the foundry sand by the upper hooking member 37 and separated from the match plate 5. 3 is placed on the lower stop member 39 of the casting frame turning mechanism 13, and then the cylinder 16 is contracted to move the match plate 5 between the upper and lower casting frames 2, 3 by a pair of arms 17, 17. Take it out. Next, the rotation shaft 33 is rotated by a required angle by driving the motor 34 of the casting frame turning mechanism 13 to turn the upper and lower casting frames 2 and 3 in the mold to the casting mold removal mechanism 12, and then to the mold if necessary. After the core is set, the upper casting frame 2 contained in the mold is lowered through the upper retaining member 37 by the contraction operation of the cylinder 38 and overlapped with the lower casting frame 3.

Next, the mold receiving table 30 is raised by the extension operation of the cylinder 31 of the mold extracting mechanism 12 to place the upper and lower casting frames 2 and 3 in the mold on the mold receiving table 30, and then the cylinder of the mold extracting mechanism 12 29 is extended to bring the extraction plate 28 into contact with the mold of the upper casting frame 2, and the cylinder 31 is contracted to lower the extraction plate 28 and the mold receiving table 30 while interlocking with each other. The mold is extracted from the casting frames 2 and 3, and then the upper and lower molds on the mold receiving table 30 are pushed out by the mold discharge device 40.

In addition, among the above-mentioned processes, after the core is set in the previously formed mold before the upper and lower casting frames 2 and 3 in the mold are swung to the mold extraction mechanism 12, the core is set as described above. Similarly, the pair of upper and lower casting frames 2 and 3 in the mold are overlapped to extract the mold.

Next, a procedure for exchanging the match plate 5 in the frameless mold making machine described above will be described. First, as shown in FIG. 5a, the cylinders 38 and 38 of the casting frame turning mechanism 13 are extended to lift the upper casting frames 2 and 2 by the upper retaining members 37 and 37, respectively, and then the loading / unloading mechanism. By moving the four cylinders 16, the pair of arms 17 and 17 are rotated counterclockwise to move the carriage 45 on which the match plate 5 (A) is placed from the rail 46 onto the rail 47 of the upper casting frame 2. Then, the match plate 5 (A) is carried into the left upper casting frame 2, and then, as shown in FIG. 5b, the upper casting frame 2 is moved up and down by a short length by the expansion and contraction operation of the cylinder 38. By the contraction operation of the cylinder 16 of the loading / unloading mechanism 4, the pair of arms 17, 17 are rotated in the clockwise direction to release the connection state of the pair of arms 17, 17 to the carriage 45, and the arms 17, 17 are To the appropriate transport device. A carriage 45 that is suspended on the attached rail and is waiting on the mold extraction mechanism 12 side and on which the match plate 5 (B) to be replaced is mounted is connected to the rate 47 of the upper casting frame 2 on the right side located in the mold extraction mechanism 12. Move to the opposite position.

Next, as shown in FIG. 6 a, the carriage 45 located at the position facing the rate 47 of the upper casting frame 2 on the right side located in the mold extraction mechanism 12 is manually placed on the rate 47 of the upper casting frame 2 on the right side. The right match plate 5 (B) is carried into the upper upper casting frame 2 and then the motor 34 of the casting frame turning mechanism 13 is driven as shown in FIG. The left match plate 5 (A) located on the sand squeeze mechanism 9 side is positioned at the mold extraction mechanism 12, and the right match plate 5 (B) located on the mold extraction mechanism 12 is positioned on the casting sand squeeze mechanism 6 side. To each turn.

Next, as shown in FIG. 7 a, the pair of arms 17, 17 is formed by the extension operation of the cylinder 16 of the loading / unloading mechanism 4 while the left upper casting frame 2 is moved up and down by a short length by the expansion and contraction operation of the cylinder 38. Is rotated counterclockwise to connect the pair of arms 17 and 17 to the cart 45 equipped with the match plate 5 (B), and the cart 45 equipped with the match plate 5 (A) is connected to the right side. As shown in FIG. 7 b, the pair of arms 17, 17 are moved in the clockwise direction by the contraction operation of the cylinder 16 of the loading / unloading mechanism 4. The carriage 45 mounted with the match plate 5 (B) is moved from the rail 47 of the left upper casting frame 2 to the rail 46 to carry out the match plate 5 (B) from the upper casting frame 2, and Match plate 5 moved right outside A) is moved to the appropriate location by an appropriate conveying device carriage 45 mounted to complete the replacement of the match plate 5.

It is a partially cutaway front view showing an embodiment of the present invention. FIG. 2 is an AA arrow view of FIG. 1 and shows a state in which the match plate 5 is sandwiched between upper and lower casting frames 2 and 3. It is a top view of FIG. It is operation | movement explanatory drawing which shows a part of process of making a casting_mold | template with the apparatus shown in FIG. 1, Comprising: It shows the state which blows foundry sand in an upper and lower casting frame. (A) It is schematic operation | movement explanatory drawing which shows a part of process of replacing | exchanging a match plate using the apparatus shown in FIG. 1, Comprising: The top view of an upper part and the front view of a lower part are a set. (B) It is schematic operation | movement explanatory drawing which shows a part of process of replacing | exchanging a match plate using the apparatus shown in FIG. 1, Comprising: The top view and lower part front view are a set. (A) It is schematic operation | movement explanatory drawing which shows a part of process of replacing | exchanging a match plate using the apparatus shown in FIG. 1, Comprising: The top view of an upper part and the front view of a lower part are a set. (B) It is schematic operation | movement explanatory drawing which shows a part of process of replacing | exchanging a match plate using the apparatus shown in FIG. 1, Comprising: The top view and lower part front view are a set. (A) It is schematic operation | movement explanatory drawing which shows a part of process of replacing | exchanging a match plate using the apparatus shown in FIG. 1, Comprising: The top view of an upper part and the front view of a lower part are a set. (B) It is schematic operation | movement explanatory drawing which shows a part of process of replacing | exchanging a match plate using the apparatus shown in FIG. 1, Comprising: The top view and lower part front view are a set. In the apparatus shown in FIG. 1, it is a front view at the time of making a hopper of a sand filling mechanism drivable. It is a detailed front view of the sand filling mechanism of FIG. It is a figure which shows one Example of the reuse method of the pattern plate to which this invention is applied. It is a figure which shows another Example of the reuse method of the pattern plate to which this invention is applied. It is sectional drawing at the time of incorporating the Example of FIG. 11 in the apparatus shown in FIG.

Explanation of symbols

2 Upper casting frame

3 Lower casting frame

5 Match plate 6 Upper squeeze plate 7 Lower squeeze plate 27 Hopper 27a Hopper 101 Match plate 102 Pattern plate 103 Pattern plate 104 Space 105 Vent

Claims (14)

  A method of reusing a pattern plate having a pattern only on one side, wherein a match plate having a plate-like member is formed by combining the pattern plate dedicated for the upper casting frame and the pattern plate dedicated for the lower casting frame facing each other. A method of reusing a pattern plate, comprising: a step of manufacturing; and a step of using the match plate in a frameless mold making machine.   The plate-like member obtained by combining the pattern plate dedicated to the upper casting frame and the pattern plate dedicated to the lower casting frame to face each other is combined to bring the bottom surfaces of the pattern plates into contact with each other. Item 2. A method of reusing a pattern plate according to Item 1.   A plate-like member obtained by combining the pattern plate dedicated for the upper casting frame and the pattern plate dedicated for the lower casting frame so as to face each other has a space in the center, and the bottom surface of the pattern plate with respect to this space The method for reusing a pattern plate according to claim 1, wherein the air holes are combined with each other and a vent hole is provided from the bottom surface to the pattern side.   The pattern plate reuse method according to any one of claims 1 to 3, wherein the pattern plate is reused by a single or a plurality of frame molding machines.   The pattern plate reuse method according to any one of claims 1 to 3, wherein the pattern plate is reused by a single or a plurality of frameless molding machines.   The frameless molding machine holds a match plate between two casting frames arranged with one end opening facing each other, and squeeze plates are fitted into the other end opening of the two casting frames. A pair of mold making spaces are defined, and the foundry sand is filled with air through the sand supply ports provided in the two peripheral walls of the casting frame disposed in the pair of mold making spaces, and the squeeze plate 6. The pattern plate reuse method according to claim 1, wherein the pattern plate is a frameless mold molding machine that compresses foundry sand to form two molds. The frameless molding machine holds a match plate between two casting frames arranged with one end opening facing each other, and squeeze plates are fitted into the other end opening of the two casting frames. A pair of mold making spaces are defined, and the foundry sand is filled with air through the sand supply ports provided in the two peripheral walls of the casting frame disposed in the pair of mold making spaces, and the squeeze plate It is a frameless mold making machine that compresses foundry sand to form two molds,
Even when the thickness of the match plate changes, the position of the sand supply port provided in the peripheral wall of the cast frame can be adjusted by moving the pair of cylindrical frame-shaped cast frames themselves in the direction of the match plate. The pattern according to any one of claims 1 to 5, wherein the match plate having a different thickness is used by moving the hopper nozzle according to the position of the moved sand supply port. How to reuse the plate. The frameless molding machine holds a match plate between two casting frames arranged with one end opening facing each other, and squeeze plates are fitted into the other end opening of the two casting frames. A pair of mold making spaces are defined, and the foundry sand is filled with air through the sand supply ports provided in the two peripheral walls of the casting frame disposed in the pair of mold making spaces, and the squeeze plate An unframed mold making machine that compresses foundry sand to form two molds,
The step of removing the conventional match plate used for molding, and moving the pair of cylindrical frame-shaped casting frames themselves according to the thickness of the new match plate, It is characterized by using a match plate by moving the sand supply port around the casting frame while keeping the position of the sand supply port, moving the plurality of hoppers away from each other or approaching them according to the position of the moved sand supply port. The method for reusing a pattern plate according to any one of claims 1 to 5. The pattern plate reuse method according to any one of claims 6 to 8, wherein the squeeze plate is composed of a plurality of squeeze feet, and the squeeze feet can be taken in and out individually. A plate-like shape in which the back surface of the pattern plate exclusively for the upper casting frame and the pattern plate exclusively for the lower casting frame provided with a pattern on only one surface between the two casting frames arranged with the opening at one end facing each other A match plate having a member is held and a squeeze plate is fitted into the other end opening of the two casting frames to define a pair of mold forming spaces, and the opposing mold forming spaces are opposed to each other. In a mold making machine that fills casting sand with air through sand supply ports provided on the two peripheral walls of the cast frame and compresses the casting sand with the squeeze plate to form two molds.
The driving means for moving at least one casting frame itself according to the thickness of the match plate, and the position of the sand supply port provided on the peripheral wall of the casting frame are moved and adjusted to the position of the moved sand supply port. And a drive means for moving at least one hopper or hopper nozzle.   The frameless mold making machine according to claim 10, further comprising thickness measuring means for measuring the thickness of the match plate.   The frameless mold making machine according to claim 10 or 11, wherein the hopper includes a plurality of hoppers, and each of the hoppers includes a driving unit.   12. The frameless mold according to claim 10, wherein the hopper is a single hopper, and a plurality of movable hopper nozzles and driving means for the hopper nozzles are further provided below the hopper. Molding machine. The frameless mold making machine according to any one of claims 10 to 13, wherein the squeeze plate is constituted by a plurality of squeeze feet, and the squeeze feet can be individually inserted and removed.