KR20200031640A - Mold height changing unit, mold forming machine, and method for changing mold height - Google Patents

Abstract

The mold making machine includes an upper casting frame, a lower casting frame capable of sandwiching and supporting a match plate together with the upper casting frame, a filling frame connectable to the lower casting frame, and a first castable that can be drawn in and out of the upper casting frame. The squeeze board, the second squeeze board that can be moved in and out of the peeling frame, the peeling frame cylinder for moving the peeling frame relative to the second squeeze board, and the peeling frame, the second squeeze board and the peeling frame cylinder are integrated. It has a squeeze cylinder to move, and a control unit for controlling the peeling frame cylinder and the squeeze cylinder. The mold height changing unit includes a stopper portion for limiting the stroke length of the filling frame cylinder to a predetermined length.

Description

Mold height changing unit, mold forming machine, and method for changing mold height

The present disclosure relates to a mold height changing unit, a flaskless molding machine, and a method for changing the mold height.

Patent document 1 discloses a moldless molding machine which molds a moldless mold without a casting mold. This molding machine includes a pair of upper and lower casting frames, a filling frame, a supply mechanism for supplying mold sand, and a mold sand for supporting a match plate on which a model is installed. A squeeze mechanism for compression is provided. The molding machine brings the lower casting frame and the filling frame closer to the upper casting frame, and sandwiches the match plate between the upper casting frame and the lower casting frame. In this state, the molding machine supplies the mold sand to the upper and lower molding spaces formed by the upper casting frame, the lower casting frame and the filling frame by operating the supply mechanism. The molding machine compresses the mold sand in the upper and lower molding spaces by operating the squeeze mechanism. Through the above process, the upper mold and the lower mold are simultaneously molded.

Patent Document 1: Japanese Patent No. 5168743

There is only one type of height (thickness) of a mold that can be molded by the flaskless molding machine described in Patent Document 1. If the height of the mold can be changed according to the height of the product, the amount of mold sand to be used can be optimized. For this reason, in the technical field, a mold height changing unit capable of changing the mold height, a flask molding machine, and a method for changing the mold height are required.

One aspect of the present disclosure is a mold height changing unit used in a flaskless molding machine. The mold making machine includes an upper casting frame, a lower casting frame capable of sandwiching and supporting a match plate together with the upper casting frame, a filling frame connectable to the lower casting frame, and a first castable that can be drawn in and out of the upper casting frame. The squeeze board, the second squeeze board that can be moved in and out of the peeling frame, the peeling frame cylinder for moving the peeling frame relative to the second squeeze board, and the peeling frame, the second squeeze board and the peeling frame cylinder are integrated. It has a squeeze cylinder to move, and a control unit for controlling the peeling frame cylinder and the squeeze cylinder. The mold height changing unit includes a stopper portion for limiting the stroke length of the filling frame cylinder to a predetermined length.

In the flask molding machine targeted by this mold height changing unit, the second squeeze board and the filling frame cylinder operate integrally. And, by the stopper portion, the stroke length of the filling frame cylinder is limited to a predetermined length. When the stroke length of the filling-frame cylinder is limited by the stopper portion, the rising distance (the distance that the filling-frame can move toward the lower casting frame) with respect to the second squeeze board is shortened. This lowers the height of the molding space of the lower mold formed by the match plate, the lower casting frame, the filling frame, and the second squeeze board, as compared to the case where the stroke length of the filling frame cylinder is not limited. As a result, a mold with a lower height is molded compared to the case where the stroke length of the filling frame cylinder is not limited. Thus, this mold height changing unit can change the mold height using a stopper part.

In one embodiment, the stopper portion has a first end and a second end, the first end being fixed to the filling frame, and a rod-shaped member inserted into a through hole formed in a frame supporting the filling-frame cylinder, and a rod-shaped member It may be attached to the second end of the, and may have a contact member that hits the frame when the peeling frame moves in a direction away from the frame.

When configured in this way, the rod-shaped member rises with the peeling frame. Then, when the peeling frame rises above the length of the rod-shaped member, the abutment member mounted on the second end of the rod-shaped member hits the frame. In this way, when the abutting member comes into contact with the frame, the stopper portion can limit the stroke length of the filling frame cylinder to a predetermined length.

In one embodiment, the length from the frame to the abutting member of the rod-like member when the peeling frame is positioned at the closest position closest to the frame may be shorter than the stroke length of the peeling frame cylinder. When configured in this way, the stopper portion can limit the stroke length.

In one embodiment, the filling frame cylinder may be an air cylinder. It is difficult for the air cylinder to stop accurately in the middle of the stroke. By using a stopper member, the mold height changing unit can be stopped accurately even during the stroke of the air cylinder.

In one embodiment, the mold height changing unit may be provided with a position detection sensor that is connected to the control unit and detects that the peeling frame cylinder is elongated to a predetermined length. When configured in this way, the position detection sensor can detect that the peeling frame has moved to a limited position by the stopper portion.

In one embodiment, the mold height changing unit may include a spacer member mounted on a main surface opposite to the match plate in the first squeeze board. In this case, the height of the molding space of the upper mold formed by the match plate, the upper casting frame, and the first squeeze board is lowered. As a result, a mold with a lower height is molded compared to the case where no spacer member is provided. In this way, the mold height changing unit can change the mold height.

In one embodiment, the material of the spacer member may be numerous. When configured in this way, a spacer member that is difficult to deform and is easy to mount is provided.

In one embodiment, the spacer member may be fixed to the first squeeze board by screws. When the spacer member can be fixed using screws, the operator can easily adjust the mold height.

In one embodiment, the spacer member may be fixed to the first squeeze board using a liner mounting screw hole provided in the first squeeze board. When configured in this way, the worker can mount the spacer member without changing the mold forming machine.

A flask molding machine according to another aspect of the present disclosure includes an upper casting frame, a lower casting frame capable of sandwiching and supporting a match plate with the upper casting frame, a filling frame connectable to the lower casting frame, and an upper casting frame. A first squeeze board that can be input and output to, a second squeeze board that can be input and output to the peeling frame, a peeling frame cylinder for moving the peeling frame relative to the second squeeze board, a peeling frame, a second squeeze board and A squeeze cylinder for integrally moving the filling frame cylinder, a control unit for controlling the filling frame cylinder and the squeeze cylinder, and a stopper part for limiting the stroke length of the filling frame cylinder to a predetermined length.

In this flaskless molding machine, the second squeeze board and the filling frame cylinder operate integrally. And, by the stopper portion, the stroke length of the filling frame cylinder is limited to a predetermined length. When the stroke length of the filling-frame cylinder is limited by the stopper portion, the rising distance (the distance that the filling-frame can move toward the lower casting frame) with respect to the second squeeze board is shortened. This lowers the height of the molding space of the lower mold formed by the match plate, the lower casting frame, the filling frame, and the second squeeze board, as compared to the case where the stroke length of the filling frame cylinder is not limited. As a result, a mold with a lower height is molded compared to the case where the stroke length of the filling frame cylinder is not limited. In this way, the mold molding machine can change the mold height.

In one embodiment, the stopper portion has a first end and a second end, the first end being fixed to the filling frame, and a rod-shaped member inserted into a through hole formed in a frame supporting the filling-frame cylinder, and a rod-shaped member It may be attached to the second end of the, and may have a contact member that hits the frame when the peeling frame moves in a direction away from the frame.

When configured in this way, the rod-shaped member rises with the peeling frame. Then, when the peeling frame rises above the length of the rod-shaped member, the abutment member mounted on the second end of the rod-shaped member hits the frame. In this way, when the abutting member comes into contact with the frame, the stopper portion can limit the stroke length of the filling frame cylinder to a predetermined length.

In one embodiment, the length from the frame to the abutting member of the rod-like member when the peeling frame is positioned at the closest position closest to the frame may be shorter than the stroke length of the peeling frame cylinder. When configured in this way, the stopper portion can limit the stroke length.

In one embodiment, the filling frame cylinder may be an air cylinder. It is difficult for the air cylinder to stop accurately in the middle of the stroke. By using a stopper member, the mold height changing unit can be stopped accurately even during the stroke of the air cylinder.

In one embodiment, the flaskless molding machine may be provided with a position detection sensor that is connected to the control unit and detects that the peeling frame cylinder is elongated to a predetermined length. When configured in this way, the position detection sensor can detect that the peeling frame has moved to a limited position by the stopper portion.

In one embodiment, the moldless molding machine may include a spacer member mounted on a main surface opposite to the match plate in the first squeeze board. In this case, the height of the molding space of the upper mold formed by the match plate, the upper casting frame, and the first squeeze board is lowered. As a result, a mold with a lower height is molded compared to the case where no spacer member is provided. In this way, the mold height changing unit can change the mold height.

In one embodiment, the material of the spacer member may be numerous. When configured in this way, a spacer member that is difficult to deform and is easy to mount is provided.

In one embodiment, the spacer member may be fixed to the first squeeze board by screws. When the spacer member can be fixed using screws, the operator can easily adjust the mold height.

In one embodiment, the spacer member may be fixed to the first squeeze board using a liner mounting screw hole provided in the first squeeze board. When configured in this way, the worker can mount the spacer member without changing the mold forming machine.

In one embodiment, the moldless molding machine is connected to the control unit, and the first mode for molding without limiting the stroke length of the filling machine cylinder, and the second mode for molding with the stroke length of the filling machine cylinder limited by the stopper portion It may be provided with an input unit that can select any one of them. When configured in this way, the input unit can accept a mode switching operation by an operator.

In one embodiment, the second mode may be molded by further using a spacer member mounted on a main surface opposite to the match plate in the first squeeze board. In this way, in the second mode, the thickness of both the upper mold and the lower mold may be changed to be thin.

A mold forming machine according to another aspect of the present disclosure includes an upper casting frame, a lower casting frame capable of sandwiching and supporting a match plate together with the upper casting frame, a filling frame connectable to the lower casting frame, and an upper casting A first squeeze board that can be moved in and out of a mold, a second squeeze board that can be moved in and out of a peeling frame, and a peeling frame cylinder that moves the peeling frame relative to the second squeeze board, a peeling frame, and a second squeeze board And a squeeze cylinder integrally moving the peeling frame cylinder, a control unit for controlling the peeling frame cylinder and the squeeze cylinder, a first position detection sensor connected to the control unit, and detecting that the peeling frame cylinder is extended to a first length. , A second position detection sensor is connected to the control unit and detects that the peeling cylinder is extended to a second length shorter than the first length, and the control unit detects the first position. A first operation mode in which the peeling frame cylinder is operated to extend to a first length based on the detection result of the manual, and a second to operate the peeling frame cylinder to be extended to a second length based on the detection result of the second position detection sensor. It is configured to switch the operation mode.

In this flaskless molding machine, it is detected that the peeling frame cylinder is extended to the first length by the first position detection sensor, and that the peeling frame cylinder is extended to the second length by the second position detection sensor. Then, the first mode in which the peeling frame cylinder is extended to the first length and the second mode in which the peeling frame cylinder is extended to the second length are switched by the control unit. In this way, this moldless molding machine can change the mold height using a position detection sensor.

Another aspect of the present disclosure is a method of changing the mold height of a flaskless molding machine. The mold making machine includes an upper casting frame, a lower casting frame capable of sandwiching and supporting a match plate together with the upper casting frame, a filling frame connectable to the lower casting frame, and a first castable that can be drawn in and out of the upper casting frame. A squeeze board, a second squeeze board that can be moved in and out of the peeling frame, a first peeling frame cylinder for moving the peeling frame relative to the second squeeze board, and a peeling frame, a second squeeze board and a peeling frame cylinder are integrated. It has a squeeze cylinder that moves the enemy. The method for changing the mold height includes preparing a second filling frame cylinder having a stroke length different from the stroke length of the first filling frame cylinder, and exchanging the first filling frame cylinder and the second filling frame cylinder.

In this method, a second peeling frame cylinder having a stroke length different from that of the first peeling frame cylinder is prepared in advance. And the mold height can be changed by exchanging the 1st peeling frame cylinder and the 2nd peeling frame cylinder.

Another aspect of the present disclosure is a method of changing the mold height of a flaskless molding machine. The mold making machine includes an upper casting frame, a lower casting frame capable of sandwiching and supporting a match plate together with the upper casting frame, a filling frame connectable to the lower casting frame, and a first castable that can be drawn in and out of the upper casting frame. A squeeze board, a second squeeze board that can be moved in and out of the peeling frame, a first peeling frame cylinder for moving the peeling frame relative to the second squeeze board, and a peeling frame, a second squeeze board and a peeling frame cylinder are integrated. It has a squeeze cylinder that moves the enemy. The method of changing the mold height includes the steps of mounting a spacer member on a main surface opposite the match plate on the first squeeze board, and mounting a spacer member on a main surface opposite the main surface opposite the match plate on the first squeeze board, And exchanging a third squeeze board having a thickness different from that of the first squeeze board and the first squeeze board.

In this method, the mold height can be changed by attaching the spacer member to the first squeeze board, or by replacing the first squeeze board with a third squeeze board having a thickness different from that of the first squeeze board. have.

According to various aspects and embodiments of the present disclosure, a mold height changing unit capable of changing the mold height, a flask molding machine, and a method for changing the mold height are provided.

1 is a front view showing an example of a flaskless molding machine according to an embodiment.
FIG. 2 is a side view of the device of FIG. 1;
3 is a schematic enlarged view around the lower squeeze board of the device of FIG. 1;
4 is a schematic enlarged view around the upper cylinder of the device of FIG. 1;
5 is a block diagram showing an electric system and a shared pressure system of the apparatus of FIG. 1.
FIG. 6 is a shared pressure circuit diagram of the frameset squeeze cylinder drive mechanism of the apparatus of FIG. 1.
7 is a flowchart showing a molding method.
It is a figure which shows the state of the pattern shuttle in process end in the shaping | molding method.
9 is a view showing a state in which the sand injection process is completed in the molding method.
It is a figure which shows the state which the squeeze process was completed in the shaping | molding method.
It is a figure which shows the completion | finish state of the shaping | molding (draw) process in a shaping | molding method.
It is a figure which shows the completion state of the pattern shuttle out process in a molding method.
It is a figure which shows the completion | finish state of the mold fitting process in the shaping | molding method.
14 is a view showing a state of removing the upper mold from the upper casting mold in the mold extraction process of the molding method.
It is a figure which shows the state of completion | finish of the mold extraction process in a shaping | molding method.
It is a figure explaining an example of the mounting position of the spacer member which concerns on embodiment.
It is a figure explaining an example of the mounting position of the stopper part which concerns on embodiment.
It is a figure explaining an example of the mounting position of the stopper part which concerns on embodiment.
It is a figure explaining the height of the molding space changed by the stopper part which concerns on embodiment.
It is a figure explaining another example of the stopper part which concerns on embodiment.
21 is a top view of an example of a position detection sensor.
22 is a side view of an example of a position detection sensor.
23 is a view showing a state in which the sand injection process is finished when the height of the molding space is changed.
24 is a view for explaining a method of changing the height of the molding space.
It is a figure explaining another example of the stopper part which concerns on embodiment.

Hereinafter, embodiments will be described with reference to the accompanying drawings. In addition, the same code | symbol is attached | subjected to the same or equivalent part in each figure, and overlapping description is abbreviate | omitted. Hereinafter, the horizontal direction is the X-axis and Y-axis directions, and the vertical direction (vertical direction) is the Z-axis direction.

[Overview of the molding machine]

1 is a front view showing an example of a flaskless molding machine according to an embodiment. The moldless molding machine 100 is a molding machine for molding the upper mold and the lower mold of the moldless mold. As shown in FIG. 1, the moldless molding machine 100 enters and retreats a mold molding part 100A for molding a mold composed of an upper mold and a lower mold, and a lower mold for the mold molding part 100A. The lower frame forward and backward drive unit 100B, the mold extrusion unit 100C for extruding the mold molded from the mold molding unit 100A to the outside, and the mold sand supply unit 100D for supplying mold sand to the mold molding unit 100A Doing.

In the mold forming part 100A, a box-shaped upper casting frame and a filling frame that can operate in the vertical direction (Z-axis direction) are disposed. The lower frame forward / backward driving unit 100B introduces the match plate on which the model is placed and the lower casting frame between the upper casting frame and the filling frame of the mold forming portion 100A. The upper casting frame, the lower casting frame, and the peeling frame of the mold forming part 100A move to be close to each other, so that the upper casting frame and the lower casting frame sandwich the match plate. The mold sand supply unit 100D fills the mold sand into the upper casting mold, the lower casting mold, and the peeling mold. The mold sand filled in the upper casting mold, the lower casting mold, and the filling mold is pressed from the vertical direction by a squeeze mechanism provided in the mold molding part 100A, thereby forming the upper mold and the lower mold simultaneously. Thereafter, the upper mold is taken out from the upper casting mold, and the lower mold is taken out from the lower casting mold and the filling mold, respectively, and is taken out of the apparatus by the mold extrusion unit 100C. In this way, the moldless molding machine 100 molds the upper mold and the lower mold, which are the moldless molds.

[Mold molding part (100A)]

FIG. 2 is a side view of the device of FIG. 1. 1 and 2, the flaskless molding machine 100 includes a gate-shaped frame 1. The door-shaped frame 1 is constituted by integrally connecting the lower base frame 1a and the upper frame 1b through the column 1c at four corners when viewed in plan. The position surrounded by the column 1c is also referred to as a "molding position".

3 is a schematic enlarged view around the lower squeeze board of the apparatus of FIG. 1; As shown in FIG. 3, the frameset squeeze cylinder 2 (an example of a squeeze cylinder) is mounted upwardly in the center part of the upper surface of the lower base frame 1a. At the distal end of the piston rod 2a of the frameset squeeze cylinder 2, a lower squeeze board 4 (an example of a second squeeze board) is mounted through the upper end 3a of the lower squeeze frame 3. The lower squeeze board 4 is a plate-shaped member which is configured to be able to enter and exit the lower filling frame and seals and compresses the mold sand filled in the lower molding space of the lower casting frame and the filling frame. The body portion 2b of the frameset squeeze cylinder 2 is inserted into the insertion hole 3c provided in the center of the lower end portion 3b of the lower squeeze frame 3. In the four corners of the plane of the lower base frame 1a, a sliding bush (not shown) having a height of at least 10 mm or more may be provided to maintain the horizontal state of the lower squeeze frame 3.

At the lower end portion 3b of the lower squeeze frame 3, four lower filling frame cylinders 5 are mounted in a vertical state so as to surround the frameset squeeze cylinder 2. The lower filling frame cylinder 5 moves the lower filling frame 6 relative to the lower squeeze board 4. As an example, the lower filling frame cylinder 5 is an air cylinder. The lower filling frame cylinder 5 may be a hydraulic cylinder or an electric cylinder. The piston rod 5a on the upper side of each lower filling frame cylinder 5 passes, as an example, the insertion hole 3d provided in the lower end portion 3b of the lower squeeze frame 3, and the lower filling line at the tip thereof. (6) (an example of a peeling frame) is mounted. The lower filling frame 6 is a box-shaped frame body with open top and bottom ends, and the upper end can be connected to the lower end of the lower casting frame, which will be described later.

The inner surface 6a of the lower peeling frame 6 is formed in a tapered shape so that the inner space of the lower peeling frame 6 narrows as it goes downward, while the lower squeeze board 4 maintains an airtight state, It is a configuration that can be inserted into the peeling frame (6). The mold sand introduction hole 6c is provided in the side wall portion 6b of the lower filling frame 6. A positioning pin 7 is provided on the upper surface of the lower filling frame 6.

As described above, the lower squeeze board 4 is mounted to the front end of the piston rod 2a of the frameset squeeze cylinder 2 through the upper end portion 3a of the lower squeeze frame 3, and the lower squeeze frame 3 ), The lower filling frame cylinder 5 is attached to the lower end portion 3b, and the lower filling frame 6 is attached to the tip of the piston rod 5a above the lower filling frame cylinder 5. For this reason, when the piston rod 2a of the frameset squeeze cylinder 2 expands and contracts, at the same time, the lower squeeze board 4, the lower squeeze frame 3, the lower filling frame cylinder 5, and the lower filling frame ( 6) is integrated and rises or falls.

In addition, when the piston rod 5a on the upper side of the lower filling frame cylinder 5 expands and contracts, the lower filling frame 6 is raised or lowered relative to the lower squeeze board 4. In this way, the lower filling frame 6 can be lifted independently and simultaneously with respect to the lower squeeze board 4. That is, only the lower filling frame 6 can be moved up and down by the lower filling frame cylinder 5 independently of the lower squeeze board 4, and the lower squeeze board 4 is attached to the frame set squeeze cylinder 2. By lifting by, the lower peeling frame 6 can be elevated simultaneously with the lower squeeze board 4.

Moreover, the lower end of the lower peeling frame 6 which can move up and down is an original position (initial position). That is, the lower squeeze board 4 is moved to a predetermined position in the lower filling frame 6 by moving in the upper direction relative to the lower filling frame 6 moving in the upper direction, thereby lower casting frame 23 ) To form a molding space (sand filling space). The lower squeeze board 4 performs a squeeze operation or returns to the original position by moving in a relatively higher direction than the lower filling frame 6.

4 is a schematic enlarged view around the upper cylinder of the apparatus of FIG. 1. As shown in FIG. 4, an upper squeeze board 8 (an example of the first squeeze board) is fixedly provided on the lower surface of the upper frame 1b, and the upper squeeze board 8 is a lower squeeze board 4 ). The upper squeeze board 8 is a plate-shaped member which is configured to be able to enter and exit the upper casting frame and seals and compresses the mold sand filled in the upper molding space of the upper casting frame. The upper frame 1b is provided with an upper frame cylinder 9 made of an air cylinder fixed downward. The upper casting frame 10 is attached to the tip of the piston rod 9a of the upper frame cylinder 9. The upper casting frame 10 is a box-shaped mold body with open top and bottom.

The inner surface 10a of the upper casting frame 10 is formed in a tapered shape so that the inner space of the upper casting frame 10 widens as it goes downward, and the upper squeeze board 8 is inserted while maintaining an airtight state It is a configuration that can be done. The mold sand introduction hole 10c is provided in the side wall portion 10b of the upper casting frame 10.

1 and 2, at an intermediate position between the upper squeeze board 8 and the lower squeeze board 4, a lower casting frame 23, which will be described later, can enter, and also enters the lower casting frame ( 23) is formed a space (S) that can be elevated. Inside the column 1c, a pair of traveling rails 11 extending in parallel in the same horizontal plane in the left-right direction (the left-right direction is defined based on the state shown in Fig. 1, hereinafter the same). Is placed.

[Lower frame advance / retreat drive unit 100B]

As shown in FIG. 1, the lower frame forward-backward drive part 100B is arrange | positioned to the side of the column 1c (X direction of the negative part in the embodiment of FIG. 1).

The lower frame forward-backward driving unit 100B includes a pattern shuttle cylinder 21. The pattern shuttle cylinder 21 is a cylinder that advances and retreats a match plate having a pattern up and down to a molding position and a standby position. The master plate 22 is attached to the front end of the piston rod 21a of the pattern shuttle cylinder 21 in a horizontal state. The master plate 22 is attached to the front end of the piston rod 21a so as to be spaced upward from the front end of the piston rod 21a.

The lower casting frame 23 is mounted on the lower surface of the master plate 22. The lower casting frame 23 can be supported by inserting a match plate together with the upper casting frame, and is a box-shaped frame with upper and lower openings. On the upper surface of the master plate 22, a match plate 24 having a model is mounted on the upper and lower surfaces. The match plate 24 is a plate-shaped member having a model on both sides of the pattern plate.

The master plate 22 is provided with roller arms 22a in a vertical state at each of the four corners of the plane. Flange rollers 22b and 22c are disposed at the upper and lower ends of each roller arm 22a, respectively.

When the piston rod 21a of the pattern shuttle cylinder 21 is in the retracted state, the lower four flange-mounted rollers 22c are a pair of guides extending parallel to the left and right directions (X direction) on the same horizontal plane. Along the rail 25, it can be electrically driven, and it is in contact with the pair of guide rails 25. When the piston rod 21a is in the forward state, the flange attachment roller 22c moves away from the pair of guide rails 25 and moves inside the column 1c.

When the piston rod 21a of the pattern shuttle cylinder 21 is in the retracted state, the upper four flanged rollers 22b are a pair in which only the two flanged rollers 22b on the right side extend from the column 1c. When placed on the left end of the traveling rail 11 of the, and the piston rod 21a is advanced, the two flange attachment rollers 22b on the left are also configured to be placed on the pair of traveling rails 11 It is done.

[Mold Extrusion (100C)]

As shown in Fig. 1, the mold extrusion section 100C is disposed on the side of the column 1c (in the X-direction of the negative section in the embodiment of Fig. 1). The mold extrusion section 100C includes a mold extrusion cylinder 31. The mold extrusion cylinder 31 is a cylinder that pushes the molded upper mold and lower mold out of the apparatus. The extrusion plate 32 is connected to the front end of the piston rod 31a of the mold extrusion cylinder 31.

[Mould Sand Supply Unit (100D)]

1 and 2, the mold sand supply unit 100D is disposed on the upper frame 1b. The mold sand supply unit 100D includes a mold sand supply port 41, a sand gate 42 that opens and closes the mold sand supply port 41, and an aeration disposed under the sand gate 42 ( aeration) tank 43. The tip end of the aeration tank 43 is divided into two branches in the vertical direction to form a sand introduction hole 43a (FIG. 8).

[Electric system and shared pressure system]

5 is a block diagram showing the electric system and the shared pressure system of the apparatus of FIG. 1. As shown in FIG. 5, the electric system of the flaskless molding machine 100 is provided with a sequencer 200 (an example of a control unit), and the touch panel 300 (FIG. 1, FIG. 2, is provided with the sequencer 200) An example of the input unit), solenoid valves (SV1, SV2, SV3, SV5, SV6, SV7, SV8), and a cut valve (CV) are electrically connected. In addition, the sequencer 200 includes a sensor for detecting the end (retraction end) of the mold extrusion cylinder, a pressure switch (PS) to be described later, and a pressure switch for monitoring that the supplied compressed air is equal to or greater than a certain pressure. Various sensors 201 are electrically connected, such as a reed switch or a proximity switch for checking the end of the cylinder, an end of the cylinder, and a proximity switch for monitoring that the mold does not become less than a certain thickness during squeeze.

The solenoid valves SV1, SV2, and SV3 and the cut valve CV are components of the frameset squeeze cylinder drive mechanism 400 shown in FIG. 6, which will be described later. The solenoid valve SV5 is a solenoid valve that supplies and exhausts compressed air to and from the mold extrusion cylinder 31 and advances and retracts the piston rod 31a. The solenoid valve SV6 is a solenoid valve that supplies and discharges compressed air to and from the pattern shuttle cylinder 21 and advances and retracts the piston rod 21a. The solenoid valve SV7 is a solenoid valve that supplies and exhausts compressed air to the upper frame cylinder 9 and advances (falls) and retracts (rises) the piston rod 9a. The solenoid valve SV8 is a solenoid valve that supplies and exhausts compressed air to the lower filling frame cylinder 5 and advances (rises) and retracts (falls) the piston rod 5a.

[Frameset squeeze cylinder drive mechanism]

6 is a shared pressure circuit diagram of the frameset squeeze cylinder drive mechanism of the apparatus of FIG. 1. 6, the frameset squeeze cylinder drive mechanism 400 includes a compressed air source 401, an oil tank 402, and a booster cylinder 403, and the pneumatic circuit 404 And an oil-on-oil drive composed of a composite circuit of the hydraulic circuit 405. Air-on-oil driving refers to driving by a combination of air pressure and hydraulic pressure used by converting air pressure into hydraulic pressure. In the air-on-oil drive, only a compressed air source is used without using a dedicated hydraulic unit using a hydraulic pump.

(Pneumatic circuit 404)

The oil tank 402 has an air pressure chamber 402a at the top, and the air pressure chamber 402a is a valve (first valve) (V1) that is controlled in two positions in conjunction with a solenoid valve (first solenoid valve) SV1. ), It is in communication with any one of the compressed air source 401 and the atmosphere (silencer 406). When the solenoid valve SV1 is not energized, the control port of the valve V1 communicates with the silencer 407 to maintain the valve V1 in an inoperative state, and the air pressure chamber 402a of the oil tank 402 Is communicated with the silencer 406, and maintains the inside of the air pressure chamber 402a at atmospheric pressure. In addition, the solenoid valve SV1 maintains the valve V1 in an operating state by communicating the control port of the valve V1 to the compressed air source 401 when energized, and the air pressure chamber of the oil tank 402 ( 402a) is communicated with the compressed air source 401, and compressed air is supplied into the air pressure chamber 402a.

The pressure-increasing cylinder 403 is a pressure-increasing cylinder using the Pascal principle, and is a cylinder having a composite function of air pressure and hydraulic pressure used by converting low-pressure air pressure to high-pressure hydraulic pressure. In the air-on-oil drive, a hydraulic pump is unnecessary, and only an air pressure source is used. The boosting cylinder 403 includes a cylinder portion 403a and a piston portion 403b. The cylinder portion 403a has an upper air pressure chamber 403c and a lower hydraulic chamber 403d, and the area ratio between the sectional area of the air pressure chamber 403c and the sectional area of the hydraulic chamber 403d is a large value, for example For example, it is set to 10: 1. The piston portion 403b is disposed in the air pressure chamber 403c of the cylinder portion 403a, and a large diameter piston that divides the air pressure chamber 403c into an upper air pressure chamber 403e and a lower air pressure chamber 403f. It is constituted by a portion 403g and a small-diameter piston portion 403h extending downward from the large-diameter piston portion 403g, and the tip portion disposed in the hydraulic chamber 403d. The boosting cylinder 403 generates a hydraulic pressure 10 times the compressed air pressure when the area ratio is 10: 1.

The upper air pressure chamber 403e of the boosting cylinder 403 is a compressed air source 401 by a valve (second valve) V2a which is 2-position controlled in conjunction with a solenoid valve (second solenoid valve) SV2. And an atmosphere (silencer 408). The solenoid valve SV2 maintains the valve V2a in an inoperative state by communicating the control port of the valve V2 to the silencer 407 when not energized, and the upper air pressure chamber 403e of the boosting cylinder 403 ) Is communicated to the silencer 408 to maintain the inside of the upper air pressure chamber 403e at atmospheric pressure. In addition, the solenoid valve SV2 maintains the valve V2a in an operating state by communicating the control port of the valve V2a to the compressed air source 401 when energized, and compressing the upper air pressure chamber 403e. In communication with the circle 401, compressed air is supplied into the upper air pressure chamber 403e. A regulator 409 is disposed in the pneumatic piping between the compressed air source 401 and the valve V2a.

The lower air pressure chamber 403f of the boosting cylinder 403 is either a compressed air source 401 or an atmosphere (silencer 410) by a valve V2b that is 2-position controlled in conjunction with a solenoid valve SV2. You are in communication with one side. When not energized, the solenoid valve SV2 communicates with the control port of the valve V2b to the compressed air source 401 to maintain the valve V2b in an operating state, and the lower air pressure chamber 403f of the boosting cylinder 403 ) Is communicated with the compressed air source 401 to supply compressed air into the lower air pressure chamber 403f. In addition, the solenoid valve SV2 maintains the valve V2a in an inoperative state by communicating the control port of the valve V2b to the silencer 411 when energized, and the lower air pressure chamber 403f is silencer. In communication with 410, the inside of the lower air pressure chamber 403f is maintained at atmospheric pressure.

The frameset squeeze cylinder 2 includes a main body portion (cylinder portion) 2b, a piston 2c disposed inside the body portion 2b, and a piston rod 2a extending upward from the piston 2c. With, as described above, the lower squeeze board 4 is connected to the tip of the piston rod 2a. The body portion 2b has an upper air pressure chamber 2d and a lower hydraulic chamber 2e, and the piston 2c divides the air pressure chamber 2d and the hydraulic chamber 2e.

The air pressure chamber 2d of the frameset squeeze cylinder 2 is in communication with either of the compressed air source 401 and the atmosphere (the silencer 407) by a solenoid valve (third solenoid valve) SV3. Becomes When not energized, the solenoid valve SV3 communicates the air pressure chamber 2d to the silencer 407 to maintain the air pressure chamber 2d at atmospheric pressure. In addition, the solenoid valve SV3 connects the air pressure chamber 2d to the compressed air source 401 when energized, and supplies compressed air into the air pressure chamber 2d.

(Hydraulic circuit 405)

The hydraulic circuit 405 fluidly communicates between the oil tank 402 and the hydraulic chamber 2e of the frameset squeeze cylinder 2 by the hydraulic piping 412, and on the oil tank 402 side. A speed controller SC and a cut valve CV are arranged in the middle of the hydraulic piping portion 412a, and the hydraulic chamber 403d of the boosting cylinder 403 is placed in the hydraulic piping portion 412b on the frameset squeeze cylinder 2 side. It is configured by fluid communication, and by disposing the pressure switch PS in the hydraulic piping portion 412b on the frameset squeeze cylinder 2 side. It is monitored by the pressure switch PS that the working oil 402b in the hydraulic piping 412b has reached a predetermined pressure.

The cut valve CV is between the oil tank 402 and the hydraulic chamber 2e of the frameset squeeze cylinder 2 when not energized, and the hydraulic chamber of the oil tank 402 and the boosting cylinder 403 ( 403d). In addition, the cut valve CV operates by compressed air pressure when energized, and between the oil tank 402 and the hydraulic chamber 2e of the frameset squeeze cylinder 2, and the oil tank 402. The pressure increasing cylinder 403 is kept in communication with the hydraulic chamber 403d.

By using a two-speed control cut valve capable of adjusting the working oil flow rate in the cut valve CV, the frameset squeeze cylinder 2 can be operated with high speed and low speed at two speeds.

[How to make a mold]

7 is a flowchart showing a molding method. As shown in the flowchart (A), the mold forming method includes a pattern shuttle-in process (S1), a frame-set process (S2), a sand injection process (S3), a squeeze process (S4), and a foot-shaped (draw ( draw)) process (S5), pattern shuttle out process (S6), mold fitting process (S7), mold extraction process (S8), and mold extrusion process (S9). First, the operation of the frameset squeeze cylinder driving mechanism 400 will be described in correspondence with the above-described process.

(At the start of modeling)

At the start of molding, the solenoid valves SV1 and SV2 are all kept in a non-conducting state, and both the solenoid valve SV3 and the cut valve CV are kept in a energized state. Since the solenoid valve SV3 is in an energized state, the piston 2c and piston rod 2a of the frameset squeeze cylinder 2 are at the bottom (lower end), and the lower squeeze board 4 is at the bottom (lower) However). Since the cut valve CV is in an energized state, between the oil tank 402 and the hydraulic chamber 2e of the frameset squeeze cylinder 2 and the oil pressure of the oil tank 402 and the boosting cylinder 403 The fluid communication with the seal 403d is maintained.

(Pattern shuttle in process (S1))

In the pattern shuttle-in process (S1), as at the start of molding, the solenoid valves SV1 and SV2 are all kept in a non-conducting state, and both the solenoid valve SV3 and the cut valve CV are kept in an energized state. do.

(Frame set process (S2))

In the frame set step (S2), energization to the solenoid valve SV1 is started, and energization to the solenoid valve SV3 is stopped. When the energization to the solenoid valve SV1 is started and the energization to the solenoid valve SV3 is stopped, the working oil 402b supplied to the hydraulic chamber 2e of the frameset squeeze cylinder 2 is a piston ( By raising 2c), the lower squeeze board 4 rises through the piston rod 2a, and the frame set is performed.

(Squeeze process (S4))

In the squeeze process S4, energization to the solenoid valve SV1 and cut valve CV is stopped, and energization to the solenoid valve SV2 is started. Compressed air supplied into the upper air pressure chamber 403e of the boosting cylinder 403 pushes down the large-diameter piston portion 403g by starting energization to the solenoid valve SV2. As the large-diameter piston portion 403g descends, the small-diameter piston portion 403h pushes the working oil 402b in the hydraulic chamber 403d. Since the pushed working oil 402b is supplied to the hydraulic chamber 2e of the frameset squeeze cylinder 2, the lower squeeze board 4 rises, and a squeeze process is performed. Moreover, the squeeze process S4 is completed by detecting that the working oil 402b has reached a predetermined pressure by the pressure switch PS.

(Foot type (draw) process (S5))

In the step (draw) step (S5), energization to the solenoid valve SV2 is stopped, and energization to the solenoid valve SV3 and the cut valve CV is started. When the energization to the solenoid valve SV2 is stopped, the piston portion 403b rises to the upper end (rising end). By the start of energization to the cut valve CV, between the oil tank 402 and the hydraulic chamber 2e of the frameset squeeze cylinder 2 and the hydraulic chamber of the oil tank 402 and the boosting cylinder 403 ( 403d) is returned to the fluid communication state.

When energization to the solenoid valve SV2 is stopped and energization to the solenoid valve SV3 and cut valve CV is started, the piston 2c of the frameset squeeze cylinder 2 is pushed down by compressed air pressure. The working oil 402b in the hydraulic chamber 2e is pushed out. The pushed working oil 402b is returned to the hydraulic chamber 403d and the oil tank 402 of the pressure increasing cylinder 403. Therefore, the piston 2c of the frameset squeeze cylinder 2 descends, and the piston portion 403b of the boosting cylinder 403 rises.

(Mold customized process (S7))

In the mold fitting process (S7), as in the case of the frame-setting process (S2), the energization to the solenoid valve SV1 is first started, and the energization to the solenoid valve SV3 is stopped. In this state, the working oil 402b in the oil tank 402 is pushed out from within the oil tank 402 by receiving the pushing force by the compressed air supplied into the air pressure chamber 402a, and the speed controller SC ) And the cut valve CV to be supplied to the hydraulic chamber 2e of the frameset squeeze cylinder 2. Therefore, the piston 2c of the frameset squeeze cylinder 2 rises.

(Frame removal process (S8))

In the mold extraction step (S8), energization to the solenoid valve SV1 is stopped, and energization to the solenoid valve SV3 is started. By the start of energization to the solenoid valve SV3, the air pressure chamber 2d of the frameset squeeze cylinder 2 communicates with the compressed air source 401, and compressed air is supplied to the air pressure chamber 2d. For this reason, since the piston 2c of the frameset squeeze cylinder 2 is pushed down by compressed air pressure, the working oil 402b in the hydraulic chamber 2e is pushed out. The pushed working oil 402b is returned to the oil tank 402. Therefore, the piston 2c of the frameset squeeze cylinder 2 descends.

Hereinafter, a series of steps of the mold forming method of the embodiment will be described in the order of steps. The flowchart (B) shows the operation of the cylinder in each process.

(At the start of modeling (Figures 1 to 4))

At the start of molding, in the mold molding section 100A, the piston rod 2a of the frameset squeeze cylinder 2 is located at the retracted end, and the lower squeeze board 4 is located at the lowered end. Further, the piston rod 5a on the upper side of the lower filling frame cylinder 5 is located at the retracted end, and the lower filling frame 6 is located at the lower end. In addition, the piston rod 9a of the upper frame cylinder 9 is located at the forward end, and the upper casting frame 10 is located at the lower end.

In the lower frame forward / backward drive unit 100B, the piston rod 21a of the pattern shuttle cylinder 21 is located at the retreat end, and the master plate 22, lower casting frame 23, and match plate 24 are respectively retracted. Is located in

In the mold extrusion section 100C, the piston rod 31a of the mold extrusion cylinder 31 is located at the retreat end, and the extrusion plate 32 is located at the retreat end.

In the mold sand supply unit 100D, the mold sand 51 (FIG. 8) is filled in the aeration tank 43. The mold sand 51 does not matter in its kind, but is, for example, a raw sand with bentonite as a caking agent.

(Pattern shuttle in process (S1) (Fig. 2, Fig. 8))

In the pattern shuttle-in process (S1), the piston rod 21a of the pattern shuttle cylinder 21 is advanced. The master plate 22 is advanced by the advancement of the piston rod 21a, and the pair of traveling rails 11 on the left of the two flanged rollers 22b among the four flanged rollers 22b on the upper side is also a pair. In addition to being placed on the top, when the lower four flange attachment rollers 22c are separated from the pair of guide rails 25 and the piston rod 21a is advanced to the forward end, the master plate 22, the lower casting frame 23 and the match plate 24 are set at predetermined positions inside the column 1c of the mold forming section 100A. It is a figure which shows the state of the pattern shuttle-in process end in the shaping | molding method.

(Frame set process (S2) (Fig. 9))

In the frame set process (S2), the piston rod 2a of the frame set squeeze cylinder 2 is advanced to raise the lower squeeze board 4, and the lower filling frame cylinder 5 is advanced to lower the filling frame ( 6) Raise, and pass the positioning pin (7) of the lower filling frame (6) through the positioning hole (not shown) of the lower casting frame (23) to lower the lower surface of the lower casting frame (23). The filling frame 6 is overlapped with each other, and a lower mold space sealed by the lower squeeze board 4, the lower filling frame 6, the lower casting frame 23 and the match plate 24 is formed. Here, since the lower squeeze board 4 and the lower squeeze frame 3 are integral, when the frameset squeeze cylinder 2 is elevated, the lower squeeze frame 3 can also be elevated together with the lower squeeze board 4. .

Next, the lower squeeze frame 3 and the lower squeeze board 4 are integrally raised, and the positioning pin 7 is inserted into the lower surface of the upper casting frame 10 to pass the lower casting frame 23. On the lower surface of the upper casting frame 10, overlapping each other through the match plate 24 and the master plate 22, the upper portion sealed by the upper squeeze board 8, the upper casting frame 10 and the match plate 24 Forms a mold space. Since the forward output of the frameset squeeze cylinder 2 at this time is for the weight of the lifting configuration, a relatively low pressure cylinder can be employed. In addition, when the upper mold space is formed, the piston rod 2a of the frameset squeeze cylinder 2 does not reach the forward end (rising end).

When the upper mold space is formed, the mold sand introduction hole 6c of the lower filling frame 6 coincides with the sand introduction hole 43a of the aeration tank 43. 9 is a view showing a state in which the sand injection process is completed in the molding method. In FIG. 9, the mold sand 51 is filled in the upper mold space and the lower mold space, but the mold set process S2 is a state before the mold sand 51 is filled.

(Sand injection process (S3) (Fig. 9))

In the sand injection process (S3), the sand gate 42 (FIG. 2) is closed in the mold sand supply unit 100D, and compressed air is supplied to the aeration tank 43. The mold sand 51 in the aeration tank 43 is introduced into the lower mold space through the sand introduction hole 43a at the lower side and the mold sand introduction hole 6c at the lower filling frame 6 by the air pressure of compressed air. In addition, it is introduced into the upper mold space through the upper sand introduction hole 43a and the upper mold casting hole 10c of the upper casting frame 10. In this sand injection process (S3), only compressed air is discharged to the outside from exhaust holes (not shown) provided in the side walls of the upper casting frame 10 and the lower casting frame 23.

(Squeeze process (S4) (Fig. 10))

In the squeeze process (S4), the piston rod 2a of the frameset squeeze cylinder 2 is further advanced, and the mold sand 52 in the upper mold space and the mold sand 53 in the lower mold space are upper squeeze boards 8 ) And the lower squeeze board 4 to compress and squeeze. In this squeeze process (S4), the lower filling frame 6, the lower casting frame 23, the match plate 24, and the upper casting frame 10 rise as the lower squeeze board 4 rises. The upper mold 54 and the lower mold 55 are formed by this squeeze process (S4). It is a figure which shows the state which the squeeze process was completed in the shaping | molding method.

When squeezing, the pressure increasing cylinder 403 (Fig. 6) is lowered to supply high-pressure working oil to the frameset squeeze cylinder 2, and the upper and lower molds having a predetermined hardness are molded. After starting the squeeze, the timing of stopping the drop of the pressure increasing cylinder 403 is performed by the pressure switch PS (Fig. 6). The timing of stopping the pressure increase (falling) by the pressure increasing cylinder 403 is preferably set within the range of 0.1 MPa to 21 MPa. When it exceeds 21 MPa, it is necessary to use a device having an internal pressure of 21 MPa or more, which increases the cost. On the other hand, when it is lower than 0.1 MPa, hardness forming a mold is not obtained.

In the present embodiment, the pressure increasing cylinder 403 is lowered from the start of the squeeze step to operate the frameset squeeze cylinder 2 at a high pressure, but at the beginning of the squeeze, the pressure increasing cylinder 403 is stopped and at a low pressure. The frame set squeeze cylinder 2 may be advanced (rising), and then the boosting cylinder 403 may be operated. By operating the initial squeeze at a low pressure, the stroke of the frameset squeeze cylinder 2 squeezing at high pressure can be shortened, so that the size of the boosting cylinder can be made more compact.

(Foot type (draw) process (S5) (Fig. 11))

In the step (draw) process (S5), the piston rod 2a of the frameset squeeze cylinder 2 is retracted, and the lower squeeze board 4 is lowered. As the lower squeeze board 4 descends, the lower casting frame 23, the match plate 24, the master plate 22, and the lower filling frame 6 also descend. On the way down, four flanged rollers 22b on the upper side of the master plate 22 are placed on a pair of running rails 11, the master plate 22, the lower casting frame 23 and the match plate ( The descent of 24) stops, and the lower squeeze board 4 and the lower filling frame 6 continue descending.

When the piston rod 2a of the frameset squeeze cylinder 2 is retracted, the pressure increase (lower) by the pressure increase cylinder 403 (FIG. 6) is stopped, and the pressure increase cylinder 403 is raised to low pressure. Operate at low pressure. Also, when removing the match plate from the mold, the mold set squeeze cylinder 2 may be operated at a low speed so that the product surface of the mold is not distorted. It is a figure which shows the completion | finish state of the shaping | molding (draw) process in the shaping | molding method.

(Pattern shuttle out process (S6) (Fig. 12))

In the pattern shuttle out process (S6), in the step (draw) process (S5), when the four flange attachment rollers 22b on the upper side of the master plate 22 are placed on the pair of travel rails 11, The master plate 22 is connected to the front end of the piston rod 21a of the pattern shuttle cylinder 21.

In the pattern shuttle-out process (S6), the piston rod 21a of the pattern shuttle cylinder 21 is retracted to the retreat end. By retraction of the piston rod 21a, the four flanged rollers 22b on the lower side of the master plate 22 are placed on a pair of guide rails 25, and on the upper side of the master plate 22. Two flange attachment rollers 22b on the left of the two flange attachment rollers 22b are spaced apart from a pair of running rails 11, the master plate 22, the lower casting frame 23 and the match plate 24 Returns to the retracted end (original position). After the pattern shuttle-out process (S6) is completed, it is possible to insert a core inside the column 1c, and core loading is performed as necessary. However, the insertion of the middle character is not essential in the present disclosure. It is a figure which shows the completion state of the pattern shuttle out process in a shaping | molding method.

(Mold fitting process (S7) (Fig. 13))

In the mold fitting process (S7), the piston rod 2a of the frameset squeeze cylinder 2 is advanced to raise the lower squeeze board 4, and the lower mold 55 is brought into close contact with the lower surface of the upper mold 54. . At this time, the advancement of the frameset squeeze cylinder 2 is operated at a low pressure while the pressure-increasing cylinder is stopped as in the frameset step S2. Moreover, it is preferable to make the frameset squeeze cylinder 2 at a low speed so that the mold is not crushed by the impact of the close contact just before the upper mold 54 and the lower mold 55 are brought into close contact. It is a figure which shows the completion | finish state of the mold fitting process in the shaping | molding method.

(Frame removal process (S8) (Fig. 14, Fig. 15))

14 is a view showing a state in which the upper mold is taken out from the upper casting mold in the mold removing process of the molding method. In the mold extraction process (S8), as shown in Fig. 14, the piston rod 9a (Fig. 4) of the upper cylinder 9 (Fig. 4) is retracted, and the upper casting frame 10 is raised. The upper mold 54 is taken out from the upper casting frame 10 by the rise of the upper casting frame 10. After the frame is removed, the piston rod 9a of the upper frame cylinder 9 is advanced, and the upper casting frame 10 is returned to the lower end (original position).

Subsequently, the piston rod 2a of the frameset squeeze cylinder 2 is retracted, and the lower squeeze board 4 is returned to the lower end (original position). Further, the piston rod 5a on the upper side of the lower filling frame cylinder 5 is retracted, and the lower filling frame 6 is returned to the lower end (original position). 15 is a view showing a state in which the mold extraction process is finished in the molding method.

The retraction of the frameset squeeze cylinder 2 at this time is operated at a low pressure while the pressure-increasing cylinder is stopped, as in the mold fitting step S7. In addition, just before the lower end of the frameset squeeze cylinder 2, the frameset squeeze cylinder 2 may be operated at a low speed in order not to impact the mold removed.

(Mold extrusion process (S9) (Fig. 1))

In the mold extrusion process (S9), the piston rod 31a of the mold extrusion cylinder 31 is advanced to advance the extrusion plate 32, and the molds on the lower squeeze board 4 (the upper mold 54 and the lower mold ( 55)) to the transfer line. Thereafter, the piston rod 31a of the mold extrusion cylinder 31 is retracted and returned to its original position.

In addition, the low pressure operation for advancing or retracting the frameset squeeze cylinder 2 in the above-mentioned mold-set process (S2), foot (draw) process (S5), mold fitting process (S7), and mold extraction process (S8). The output of may be 0.1 MPa to 0.6 MPa. The air-on-oil drive described above is applied to the frameset squeeze cylinder drive mechanism 400. In a typical foundry, the supply pressure of the compressed air source 401 is set to about 0.6 MPa. It is possible to make the pressure over 0.6 MPa, but it is necessary to increase the capacity of the compressor. Therefore, it may be 0.6 MPa or less from the viewpoint of energy saving. Further, at a pressure lower than 0.1 MPa, it is difficult to drive the frameset squeeze cylinder 2 due to the weight of the object to be driven and frictional resistance such as packing in the cylinder.

In addition, the forward and backward movements of the piston rod 21a of the pattern shuttle cylinder 21 are performed by air pressure of 0.1 MPa to 0.6 MPa. As described above, since the pattern shuttle cylinder 21 needs only to be able to advance and retreat the master plate 22, the lower casting frame 23, and the match plate 24, an air pressure of 0.1 MPa to 0.6 MPa may be used. As described above, since the supply pressure of the compressed air source of a typical foundry is about 0.6 MPa, from the viewpoint of energy saving, the air pressure for operating the pattern shuttle cylinder 21 may be 0.6 MPa or less. In addition, at an air pressure lower than 0.1 MPa, it is difficult to operate the pattern shuttle cylinder 21 due to the weight of the object to be advanced and reversed or frictional resistance in the cylinder.

Moreover, the air pressure for advancing (rising) and retracting (falling) the piston rod 5a of the lower filling frame cylinder 5 may be 0.1 MPa to 0.6 MPa. The lower filling frame cylinder 5 is used for lifting the lower filling frame 6, the lower casting frame 23 and the match plate 24, and is used to form the lower mold from the lower filling frame 6, so 0.1 MPa It can be operated at an air pressure of 0.6 MPa. Since the supply pressure of the compressed air source 401 in the general foundry is about 0.6 MPa, the air pressure for operating the lower filling frame cylinder 5 from the viewpoint of energy saving may be 0.6 MPa or less. Moreover, when it is less than 0.1 MPa, it is difficult to operate the lower filling frame cylinder 5 by the weight of the object to be raised or the frictional resistance in the cylinder.

[Mould Height Change Unit]

The above-mentioned moldless molding machine 100 can mold only the upper mold and the lower mold of one type of height. Hereinafter, the mold height changing unit 500 applicable to the above-described moldless molding machine 100 will be described.

(Mould height change unit for upper mold)

The mold height changing unit 500 may include a spacer member for changing the mold height. It is a figure explaining an example of the mounting position of the spacer member which concerns on embodiment. As shown in FIG. 16, a spacer member 600 is attached to the lower surface 8c (an example of the main surface opposite to the match plate 24) of the upper squeeze board 8. The spacer member 600 is fixed to the lower surface 8c of the upper squeeze board 8 by, for example, a screw. In addition, when a screw hole (liner mounting screw hole) for mounting the liner as a countermeasure against wear is formed on the lower surface 8c of the upper squeeze board 8, the spacer member 600 opens the screw hole. It may be fixed to the upper squeeze board 8 by using.

The material of the spacer member 600 is not particularly limited, but is, for example, resin. When the spacer member 600 is formed of a resin, it is made lighter in comparison with the case of being formed of a metal, so that mounting is easy. Further, the thickness of the spacer member 600 is not particularly limited, but is, for example, about 15 mm to 75 mm. By providing the spacer member 600, the height of the molding space of the upper mold can be lowered by the thickness of the spacer member 600, so that the thickness of the upper mold can be reduced as a result.

(Mould height change unit for lower mold)

The mold height changing unit 500 may include a stopper part for changing the height of the lower mold. 17 and 18 are views for explaining an example of the mounting position of the stopper portion according to the embodiment. 17 and 18, at least one stopper portion 601 for limiting the stroke length of the lower filling frame cylinder 5 to a predetermined length is attached to the lower filling frame 6. As an example, the stopper parts 601 are provided two at each of two opposing ends of the lower filling frame 6.

The stopper part 601 has a rod-shaped member 602 and abutting member 603 as an example. The rod-shaped member 602 has a first end 602a and a second end 602b. The first end 602a is detachably attached to the lower peeling frame 6. As an example, the first end 602a is fixed to the lower filling frame 6 by screws 604 to 606. A through hole 3e is formed in the lower end portion 3b of the lower squeeze frame 3 to which the lower filling frame cylinder 5 is fixed. The rod-shaped member 602 extends to the lower portion of the lower filling frame 6 and is inserted into the through hole 3e formed in the lower squeeze frame 3 supporting the lower filling frame cylinder 5. The length (projection length L1) from the lower squeeze frame 3 to the abutting member 603 of the rod-shaped member 602 is shorter than the stroke length of the lower filling frame cylinder 5. More specifically, the rod-shaped member (from the lower surface (abutting surface)) of the lower squeeze frame 3 when the lower filling frame 6 is positioned at the closest position closest to the lower squeeze frame 3 The length (projection length L1) of the abutment member 603 of the abutment member 603 to the upper surface (abutment surface) is shorter than the stroke length of the lower filling frame cylinder 5. Moreover, the stroke length is the distance of the slide in one stroke of the cylinder, and is the distance from the top dead center to the bottom dead center.

The abutting member 603 is attached to the second end 602b of the rod-shaped member 602. The abutting member 603 is detachable from the rod-shaped member 602. The abutment member 603 is a nut as an example, and is attached by screwing to a male screw formed at the second end 602b of the rod-shaped member 602. The abutting member 603 has a size or shape that cannot pass through the through hole 3e.

The rod-shaped member 602 and the abutting member 603 move together with the lower filling frame 6 by the lower filling frame cylinder 5. For this reason, when the lower peeling frame 6 moves a length longer than the protruding length L1 in a direction away from the lower end portion 3b of the lower squeeze frame 3, the abutting member 603 lowers the lower squeeze frame ( 3). Thereby, the movement in the extending direction of the lower filling frame cylinder 5 is restricted, and the relative distance between the lower filling frame 6 and the lower squeeze frame 3 is limited. Thereby, the height of the molding space is changed.

It is a figure explaining the height of the molding space changed by the stopper part which concerns on embodiment. The drawing shown on the left side than the one-dot chain line is a drawing showing the position of the extended end of the lower filling frame cylinder 5 in the device without the stopper portion 601. The drawing shown on the right side than the one-dot chain line is a diagram showing the position of the extended end of the lower filling frame cylinder 5 in the device provided with the stopper portion 601. As shown in the drawing on the left, when the stopper portion 601 is not provided, the lower filling frame 6 rises to the extended end position of the lower filling frame cylinder 5. For this reason, when the stopper part 601 is not provided, shaping | molding operation is performed in the extension end of the lower filling frame cylinder 5. The height from the upper end of the lower filling frame 6 connected to the lower casting frame 23 to the lower squeeze board 4 is set to H1.

As shown in the drawing on the right, when the stopper portion 601 is provided, the lower filling frame 6 is lifted by the stopper portion 601 before rising to the extended end position of the lower filling frame cylinder 5. The rise is limited. More specifically, the elevation of the lower filling frame 6 is limited to the protruding length L1. The height from the upper end of the lower filling frame 6 connected to the lower casting frame 23 to the lower squeeze board 4 is set to H2. By providing the stopper part 601, the height of the molding space of the lower mold is changed to be low by the height H3 obtained by subtracting the height H2 from the height H1. As a result, the thickness of the lower mold can be reduced as a result. The stopper portion 601 functions more effectively for a flaskless molding machine that does not control the position of the lower filling frame cylinder 5. The flaskless molding machine that does not control the position of the lower filling frame cylinder 5 has various advantages that the structure is simple, the machine stops due to slight abnormality of the cylinder, and the accuracy of the position is high. On the other hand, although there was a demerit that the moldless molding machine which does not control the position of the lower filling frame cylinder 5 cannot change the thickness of the mold, only the demerit can be solved by providing the stopper portion 601.

Hereinafter, the case where molding is performed without limiting the stroke length of the lower filling frame cylinder 5 is referred to as a first mode, and molding is performed while the stroke length of the lower filling frame cylinder 5 is restricted by the stopper part 601. The case is called the second mode. The mold height changing unit 500 may be provided with a touch panel 300 connected to the sequencer 200 and capable of selecting either the first mode or the second mode. In the second mode, the above-described spacer member 600 mounted on the lower surface 8c of the upper squeeze board 8 may be used.

(Other examples of mold height change unit for lower mold)

The mold height changing unit 500 for the lower mold is not limited to the stopper portion 601 described above. It is a figure explaining another example of the stopper part which concerns on embodiment. As shown in Fig. 20, the lower filling frame cylinder 5 has a stopper portion 611. At least one of the lower filling frame cylinders 5 provided in the flaskless molding machine 100 may be provided with a stopper part 611. As an example, all of the four lower filling frame cylinders 5 have a stopper portion 611. The stopper part 611, like the stopper part 601, limits the stroke length of the lower filling frame cylinder 5 to a predetermined length. That is, the moldless molding machine 100 can employ the stopper part 611 instead of the stopper part 601.

The stopper portion 611 has, for example, a rod-shaped member 612 and abutting member 613. The rod-shaped member 612 has a first end 612a and a second end 612b. The first end 612a of the rod-shaped member 612 is configured such that the rod-shaped member 612 operates integrally with the piston rod 5a of the lower filling-frame cylinder 5, so that the It is provided at the bottom of the piston rod (5a). The second end 612b of the rod-shaped member 612 is located under the lower filling frame cylinder 5. The rod-shaped member 612 enters into the lower filling frame cylinder 5 as the piston rod 5a rises. The abutting member 613 is attached to the second end 612b of the rod-shaped member 612. The length from the lower end of the lower filling frame cylinder 5 to the abutting member 613 of the rod-shaped member 612 (protrusion length L2) is shorter than the stroke length of the lower filling frame cylinder 5. More specifically, the rod-shaped member from the lower end (abutting surface) of the lower filling frame cylinder 5 when the lower filling frame 6 is located at the closest position closest to the lower squeeze frame 3 The length (projection length L2) to the upper surface (contact surface) of the abutting member 613 of 612 is shorter than the stroke length of the lower filling frame cylinder 5.

The abutting member 613 is detachable from the rod-shaped member 612. The abutment member 613 is a nut as an example, and is attached by screwing to a male screw formed at the second end 612b of the rod-shaped member 612. The abutting member 613 has a larger cross section than the cross section of the rod-shaped member 612.

The rod-shaped member 612 and the abutting member 613 move together with the piston rod 5a of the lower filling frame cylinder 5. For this reason, when the piston rod 5a is extended beyond the protruding length L2, the abutting member 613 hits the lower end of the lower filling frame cylinder 5. Thereby, the movement in the extending direction of the lower filling frame cylinder 5 is restricted, and the relative distance between the lower filling frame 6 and the lower squeeze frame 3 is limited. Thereby, the height of the molding space is changed.

A liner member 614 for preventing wear may be provided at the bottom of the lower filling frame cylinder 5. The rod-shaped member 612 and the piston rod 5a may be composed of a single member. That is, the lower filling frame cylinder 5 may be a so-called double rod cylinder.

[Position detection sensor]

When the mold height changing unit 500 is mounted, the position of the extension end (top dead center) of the lower filling frame cylinder 5 is changed. In addition, since the thickness of the mold becomes thin, the height position of the mold fit and the position of monitoring the thickness of the mold during squeeze are also changed. For this reason, when the mold height changing unit 500 is provided, as an example of the sensor 201, in the flask molding machine 100, the extension end (predetermined length) of the lower filling frame cylinder 5 after changing the mold height For example, may be further added a position detection sensor that detects the monitoring position of the mold thickness after the mold height change, and the height position of the mold after the mold height change. As the position detection sensor, a proximity sensor or a reed switch provided for each stop position to detect the position, or an encoder capable of detecting a constant position over a certain range (movable range) is used.

An example of an encoder will be described as an example of a representative position detection sensor. 21 is a top view showing an example of a position detection sensor. 22 is a front view showing an example of a position detection sensor. As shown in FIGS. 21 and 22, the position detection sensor 70 includes a magnet 60 and a magnetic field detection unit 61. The magnet 60 is attached to the members 62 and 63 that move together with the lower filling frame 6. The magnet 60 may be mounted directly on the lower peeling frame 6. The magnet 60 is a ring-shaped member whose part is cut off. The magnetic field detection unit 61 is mounted on a column 1c that is a fixed frame, is made of a rectangular member extending in the vertical direction, and detects a magnetic field generated between the magnets 60. The magnetic field detection unit 61 is provided along the moving direction of the lower peeling frame 6. The magnet 60 is disposed so that the magnetic field detection unit 61 is located therein. Since the magnet 60 moves together with the lower peeling frame 6, the position detection sensor 70 can detect the height position (absolute position) of the lower peeling frame 6 by detecting the magnetic field position. .

As an example of the position detection described above, a sand injection process (S3) will be described. 23 is a view showing a state in which the sand injection process is finished when the height of the molding space is changed. As shown in FIG. 23, when the spacer member 600 and the stopper portion 601 which are the mold height changing unit 500 are mounted, the height of the molding space of the upper mold and the molding space of the lower mold is changed. For this reason, the position detection sensor 70 is provided so that the height position of the lower peeling frame 6 after a change can be detected. Similarly, a position detection sensor 70 that monitors the mold so that the mold does not become less than a certain thickness during squeeze may be added separately.

[Control using position detection sensor]

The sensor 201 (including the position detection sensor 70) is connected to the sequencer 200. The sequencer 200 may display the detection result of the position detection sensor 70 on the touch panel 300. For example, when the mold is being monitored so that the mold does not become less than a certain thickness during squeeze, an alarm or the like is output according to the detection result of the position detection sensor 70. The sequencer 200 may display the monitoring result according to the monitoring mode. For example, in the first monitoring mode, the sequencer 200 monitors only the mold height of the upper casting frame 10 and displays the monitoring result. In the second monitoring mode, the sequencer 200 monitors only the mold height of the lower casting frame 23 and displays the monitoring result. In the third monitoring mode, the sequencer 200 monitors the mold heights of the upper casting frame 10 and the lower casting frame 23 and displays monitoring results. The touch panel 300 may display a screen capable of selecting a monitoring mode, and may be selected by an operator. In addition, as described above, when the mold height changing unit 500 is mounted, the monitoring position is changed. For this reason, the moldless molding machine 100 may be provided with the touch panel 300 which a worker can select whether the mold height changing unit 500 is attached. The sequencer 200 may display the monitoring result on the touch panel 300 based on the position detection sensor that detects the height position after the change, when the mold height changing unit 500 is mounted by the operator. .

[Other example 1 of how to change the mold height]

The sequencer 200 may change the mold height based on the position detection sensor. The above-described sensor 201 (position detection sensor 70) includes, for example, a first position detection sensor that detects that the lower filling frame cylinder 5 is extended to an extension end (an example of a first length). , A second position detection sensor for detecting that the lower filling frame cylinder 5 is extended to a length shorter than the extension end (an example of the second length). The sequencer 200 extends based on the detection result of the second position detection sensor and the first operation mode of operating the lower filling frame cylinder 5 to extend to the extension end based on the detection result of the first position detection sensor. It is configured to switch the second operating mode of operating the lower filling frame cylinder 5 so as to extend to a length shorter than the stage. When operating in the second operation mode, the sequencer 200 stops the lower filling frame cylinder 5 when it is detected by the position detection sensor that the lower filling frame cylinder 5 has been extended to a length shorter than the extension end. Order. Thereby, the mold height can be changed. Moreover, the sequencer 200 may add one or more different operation modes as needed. For example, a third position detection sensor may be further provided, and the third operation mode may be configured to be executable. In this case, the sequencer 200, as a third operation mode, operates the lower filling frame cylinder 5 to extend to a position detected by the third position detection sensor. In addition, since the encoders of Figs. 21 and 22 always detect the position, when using the encoders of Figs. 21 and 22, a new position detection sensor is not provided, and an arbitrary number of operation modes can be easily added. .

[Other example 2 of how to change the mold height]

If the elongation ends of the lower filling frame cylinder 5 are different, the mold height can be changed. For this reason, the mold height can be changed in the following procedure. First, a second peeling frame cylinder having a stroke length different from that of the first peeling frame cylinder is prepared. Next, the first peeling frame cylinder and the second peeling frame cylinder are exchanged. By this order, the mold height can be easily changed.

[Other example 3 of how to change the mold height]

24 is a view for explaining a method of changing the height of the molding space. Element (A) of FIG. 24 shows the positional relationship between the upper squeeze board 8 and the upper casting frame 10 before changing the height of the upper molding space. Hereinafter, a case where the height of the upper molding space is made low by the height d1 will be described as an example. The method of changing the mold height has, for example, a step of mounting the spacer member 600 having a thickness d1 on the lower surface 8c (the main surface facing the match plate 24) of the upper squeeze board 8. In this case, as shown in element (B) of FIG. 24, the height of the upper molding space is lowered by the thickness d1 of the spacer member 600. Alternatively, in the mold height changing method, an upper squeeze board 8A (a third squeeze board having a thickness different from that of the first squeeze board) thicker than the upper squeeze board 8 by a thickness d1 is prepared, and the upper squeeze board (8) and the upper squeeze board (8A) may be exchanged. In this case, as shown in element C of FIG. 24, the height of the upper molding space is lowered by a difference d1 in the thickness between the upper squeeze board 8 and the upper squeeze board 8A. Alternatively, the method of changing the mold height may have a step of mounting a spacer member 600A having a thickness d1 on the upper surface 8d on the opposite side of the lower surface 8c of the upper squeeze board 8. In this case, as shown in the element D of FIG. 24, the height of the upper molding space is lowered by the thickness d1 of the spacer member 600A. The method of changing the mold height has any one of the methods described above.

[Arrangement of embodiments]

In the mold forming machine 100 targeted by the mold height changing unit 500, the lower squeeze board 4 and the lower filling frame cylinder 5 operate integrally. And, by the stopper part 601, the stroke length of the lower filling frame cylinder 5 is limited to a predetermined length. By the stroke length of the lower filling frame cylinder 5 is limited by the stopper portion 601, the rising distance of the lower filling frame 6 to the lower squeeze board 4 (lower towards the lower casting frame 23) The distance that the peeling frame 6 can move) becomes shorter. By this, compared to the case where the stroke length of the lower filling frame cylinder 5 is not limited, to the match plate 24, the lower casting frame 23, the lower filling frame 6, and the lower squeeze board 4 The height of the molding space of the lower mold formed by this is lowered. Thereby, the mold having a low height is molded compared with the case where the stroke length of the lower filling frame cylinder 5 is not limited. In this way, the mold height changing unit 500 can change the mold height using the stopper portion 601.

Since the mold sand can be saved by allowing the mold height to be adjusted low, the running cost can be reduced. In addition, the change of the mold height can be realized at a low cost, such as simply attaching the spacer member 600 or the stopper portion 601.

In addition, the above-described embodiment shows an example of a flaskless molding machine according to the present disclosure. The moldless molding machine according to the present disclosure is not limited to the moldless molding machine 100 according to the embodiment, and the scope of the moldless molding machine 100 according to the embodiment is modified, or the scope of the claims is not changed. It may be applied to other things.

For example, some of the steps of the method in the above-described embodiment may independently make the order. That is, it can be performed in a different order from the described order.

Moreover, although the pneumatic cylinder was used for the pattern shuttle cylinder 21 in embodiment, you may use it as an electric cylinder instead. When the electric cylinder is used, the pneumatic piping for the pattern shuttle cylinder 21 is unnecessary, and thus a simple configuration is achieved.

In addition, in the embodiment, a configuration in which a squeeze force is applied from the bottom to the top is applied, but a configuration in which a squeeze force is applied from the top to the bottom or in the horizontal direction may be used.

In addition, in the above-mentioned embodiment, although the fact that the abutting member 603 of the stopper portion 601 cannot pass through the through hole 3e has been described, it is not limited to this. It is a figure explaining another example of the stopper part which concerns on embodiment. As shown by element (A) in FIG. 25, a through hole 3f having an asymmetric opening is formed in the lower end portion 3b of the lower squeeze frame 3. Then, as shown in the element (B) of FIG. 25, the abutting member 608 having an asymmetric shape conforming to the shape of the through hole 3f, the second end 602b of the rod-shaped member 602 Is mounted on. The abutting member 608 is rotatably mounted around the axis Z1 of the rod-shaped member 602. By configuring in this way, the mold height can be changed only by changing the direction of the abutting member 608.

2-Frameset squeeze cylinder (squeeze cylinder)
4-Lower squeeze board (second squeeze board)
5-Lower Filling Cylinder (Pilling Cylinder)
6-Lower Filling Frame (Peeling Frame)
8-upper squeeze board (first squeeze board)
8A-Upper Squeeze Board (Third Squeeze Board)
10-upper casting frame
21-pattern shuttle cylinder
23-lower casting frame
24-match plate
51-mold sand
54-upper mold
55-lower mold
100-moldless molding machine
500-mold height change unit
600-spacer member
601, 611-Stopper part

Claims (25)

A mold height change unit used in a frameless molding machine,
The moldless molding machine,
Upper casting frame,
A lower casting frame that can be supported by sandwiching the match plate together with the upper casting frame,
A filling frame that can be connected to the lower casting frame,
A first squeeze board that can be put in and out of the upper casting frame,
A second squeeze board capable of entering and exiting the filling frame;
A peeling frame cylinder for moving the peeling frame relative to the second squeeze board;
A squeeze cylinder integrally moving the filling frame, the second squeeze board, and the filling frame cylinder;
It has a control unit for controlling the filling cylinder and the squeeze cylinder,
The mold height changing unit,
A mold height changing unit having a stopper portion for limiting the stroke length of the filling frame cylinder to a predetermined length. The method according to claim 1,
The stopper portion,
A rod-shaped member having a first end and a second end, wherein the first end is fixed to the filling frame and inserted into a through hole formed in a frame supporting the filling frame cylinder;
A mold height changing unit mounted on the second end of the rod-shaped member and having an abutting member hitting the frame when the peeling frame moves in a direction away from the frame. The method according to claim 2,
A mold height changing unit having a length from the frame to the abutting member of the rod-shaped member when the peeling frame is positioned at the closest position closest to the frame is shorter than the stroke length of the peeling frame cylinder. The method according to claim 1,
The stopper portion,
It has a first end and a second end, the first end is provided at the bottom of the piston rod of the filling frame cylinder, the second end is located at the bottom of the filling frame cylinder, the piston rod as the rise of the A rod-shaped member that enters the filling frame cylinder,
A mold height change having a contact member mounted on the second end of the rod-shaped member and having an abutting member hitting the lower end of the peeling frame cylinder when the peeling frame moves in a direction away from the frame supporting the peeling frame cylinder unit. The method according to claim 4,
The length from the lower end of the filling frame cylinder to the abutting member of the rod-shaped member when the filling frame is located at the closest position closest to the frame is shorter than the stroke length of the filling frame cylinder. Height change unit. The method according to any one of claims 1 to 5,
The filling frame cylinder is a mold height changing unit that is an air cylinder. The method according to any one of claims 1 to 6,
A mold height changing unit connected to the control unit and comprising a position detection sensor for detecting that the peeling cylinder is extended to the predetermined length. The method according to any one of claims 1 to 7,
A mold height changing unit having a spacer member mounted on a main surface opposite to the match plate in the first squeeze board. The method according to claim 8,
The material for the spacer member is a mold height changing unit made of resin. The method according to claim 8 or claim 9,
The spacer member is a mold height changing unit fixed by a screw to the first squeeze board. The method according to claim 10,
The spacer member is a mold height changing unit fixed to the first squeeze board using a screw hole for mounting a liner provided on the first squeeze board. Upper casting frame,
A lower casting frame that can be supported by sandwiching the match plate together with the upper casting frame,
Filling frame that can be connected to the lower casting frame,
A first squeeze board that can be in and out of the upper casting frame,
A second squeeze board capable of entering and exiting the filling frame;
A peeling frame cylinder for moving the peeling frame relative to the second squeeze board;
A squeeze cylinder integrally moving the filling frame, the second squeeze board, and the filling frame cylinder;
A control unit for controlling the filling frame cylinder and the squeeze cylinder;
A moldless molding machine having a stopper portion for limiting the stroke length of the filling frame cylinder to a predetermined length. The method according to claim 12,
The stopper portion,
A rod-shaped member having a first end and a second end, wherein the first end is fixed to the filling frame and inserted into a through hole formed in a frame supporting the filling frame cylinder;
A moldless molding machine mounted on the second end of the rod-shaped member and having an abutting member hitting the frame when the peeling frame moves in a direction away from the frame. The method according to claim 13,
A lengthless molding machine having a length from the frame to the abutting member of the rod-shaped member when the peeling frame is positioned at the closest position closest to the frame is shorter than the stroke length of the peeling frame cylinder. The method according to any one of claims 12 to 14,
The filling frame cylinder is a flaskless molding machine that is an air cylinder. The method according to any one of claims 12 to 15,
A flask molding machine having a position detecting sensor connected to the control unit and detecting that the peeling cylinder is extended to the predetermined length. The method according to any one of claims 12 to 16,
And a spacer member mounted on a main surface opposite to the match plate in the first squeeze board. The method according to claim 17,
The material of the spacer member is a resin molding machine. The method according to claim 17 or claim 18,
The spacer member is a moldless molding machine that is fixed to the first squeeze board by a screw. The method according to claim 19,
The spacer member is a moldless molding machine fixed to the first squeeze board using a screw hole for mounting a liner provided on the first squeeze board. The method according to any one of claims 12 to 20,
It is connected to the control unit and selects one of a first mode for molding without limiting the stroke length of the filling frame cylinder and a second mode for molding with the stroke length of the filling frame cylinder limited by the stopper portion A molding machine equipped with an input unit that can be used. The method of claim 21,
In the second mode, the moldless molding machine is further molded using a spacer member mounted on a main surface opposite to the match plate in the first squeeze board. Upper casting frame,
A lower casting frame that can be supported by sandwiching the match plate together with the upper casting frame,
Filling frame that can be connected to the lower casting frame,
A first squeeze board that can be in and out of the upper casting frame,
A second squeeze board capable of entering and exiting the filling frame;
A peeling frame cylinder for moving the peeling frame relative to the second squeeze board;
A squeeze cylinder integrally moving the filling frame, the second squeeze board, and the filling frame cylinder;
A control unit for controlling the filling frame cylinder and the squeeze cylinder;
A first position detection sensor connected to the control unit and detecting that the peeling frame cylinder is extended to a first length;
And a second position detection sensor connected to the control unit and detecting that the peeling frame cylinder is extended to a second length shorter than the first length,
The control unit is configured to operate the peeling frame cylinder to extend to the first length based on the detection result of the first position detection sensor, and the first operation mode based on the detection result of the second position detection sensor. A moldless molding machine configured to switch the second operation mode of operating the peeling frame cylinder so as to extend to 2 lengths. As a method for changing the mold height of a moldless molding machine,
The moldless molding machine,
Upper casting frame,
A lower casting frame that can be supported by sandwiching the match plate together with the upper casting frame,
Filling frame that can be connected to the lower casting frame,
A first squeeze board that can be in and out of the upper casting frame,
A second squeeze board capable of entering and exiting the filling frame;
A first peeling frame cylinder for moving the peeling frame relative to the second squeeze board;
And a squeeze cylinder integrally moving the filling frame, the second squeeze board, and the filling frame cylinder.
How to change the mold height,
Preparing a second peeling frame cylinder having a stroke length different from the stroke length of the first peeling frame cylinder;
And a step of exchanging the first filling frame cylinder and the second filling frame cylinder. As a method for changing the mold height of a moldless molding machine,
The moldless molding machine,
Upper casting frame,
A lower casting frame that can be supported by sandwiching the match plate together with the upper casting frame,
Filling frame that can be connected to the lower casting frame,
A first squeeze board that can be in and out of the upper casting frame,
A second squeeze board capable of entering and exiting the filling frame;
A first peeling frame cylinder for moving the peeling frame relative to the second squeeze board;
And a squeeze cylinder integrally moving the filling frame, the second squeeze board, and the filling frame cylinder.
How to change the mold height,
Mounting a spacer member on a main surface opposite the match plate in the first squeeze board, mounting a spacer member on a main surface opposite the main surface opposite the match plate in the first squeeze board, and the A method of changing a mold height having one of the steps of exchanging a first squeeze board and a third squeeze board having a thickness different from that of the first squeeze board.

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