CN110891709A

CN110891709A - Mold height changing unit, frame-removing molding machine, and mold height changing method

Info

Publication number: CN110891709A
Application number: CN201880046911.4A
Authority: CN
Inventors: 高须修司; 小宫山贵之
Original assignee: Sintokogio Ltd
Current assignee: Sintokogio Ltd
Priority date: 2017-07-18
Filing date: 2018-04-13
Publication date: 2020-03-17
Also published as: JPWO2019017024A1; WO2019017024A1; KR20200031640A; EP3656484A4; TW201908032A; JP6856123B2; US20200222973A1; RU2020106895A; EP3656484A1; BR112020000598A2

Abstract

The frame-removing molding machine of the invention comprises: putting a mold frame; the lower die frame can clamp the parting plate together with the upper die frame; a filling frame which can be connected with the lower mold frame; the 1 st extrusion plate can get in and out relative to the upper die frame; a 2 nd extrusion plate which can move in and out relative to the filling frame; a filling frame cylinder which moves the filling frame relatively to the No. 2 extrusion plate; a pressing cylinder that integrally moves the filling frame, the 2 nd pressing plate, and the filling frame cylinder; and a control unit for controlling the filling frame cylinder and the extruding cylinder. The mold height changing unit includes a stopper portion for limiting a stroke length of the filling frame cylinder to a predetermined length.

Description

Mold height changing unit, frame-removing molding machine, and mold height changing method

Technical Field

The present disclosure relates to a mold height changing unit, a frame-removing molding machine, and a mold height changing method.

Background

Patent document 1 discloses a frame-removing molding machine for molding a frameless mold having no mold frame. The molding machine comprises a set of upper and lower mold frames for holding a parting plate to which a mold is to be set, a filling frame, a supply mechanism for supplying casting sand, and an extrusion mechanism for compressing the casting sand. The molding machine makes the lower mold frame and the filling frame approach the upper mold frame, and clamps the parting plate through the upper mold frame and the lower mold frame. In this state, the molding machine operates the supply mechanism to supply the casting sand to the upper and lower molding spaces formed by the upper mold frame, the lower mold frame, and the filling frame. The molding machine compresses the molding sand in the upper and lower molding spaces by operating the squeezing mechanism. Through the above steps, the upper mold and the lower mold are simultaneously molded.

Patent document 1: japanese patent No. 5168743

The height (thickness) of the mold that can be molded by the frame-removing molding machine described in patent document 1 is only one. If the height of the mold can be changed according to the height of the product, the amount of the casting sand to be used can be optimized. Therefore, in the present technology field, a mold height changing unit, a frame-removing molding machine, and a mold height changing method that can change the mold height are desired.

Disclosure of Invention

One aspect of the present disclosure is a mold height changing unit for a knock-out molding machine. The frame-removing molding machine comprises: putting a mold frame; the lower die frame can clamp the parting plate together with the upper die frame; a filling frame which can be connected with the lower mold frame; the 1 st extrusion plate can get in and out relative to the upper die frame; a 2 nd extrusion plate which can move in and out relative to the filling frame; a filling frame cylinder which moves the filling frame relatively to the No. 2 extrusion plate; a pressing cylinder that integrally moves the filling frame, the 2 nd pressing plate, and the filling frame cylinder; and a control unit for controlling the filling frame cylinder and the extruding cylinder. The mold height changing unit includes a stopper portion for limiting a stroke length of the filling frame cylinder to a predetermined length.

In the frame-removing molding machine targeted for the mold height changing means, the 2 nd squeeze plate and the filling frame cylinder are integrally operated. The stroke length of the filling frame cylinder is limited to a predetermined length by the stopper. By limiting the stroke length of the filling frame cylinder by the stopper, the rising distance of the filling frame with respect to the 2 nd extrusion plate (the distance the filling frame can move toward the lower die frame) becomes short. Therefore, compared with the case of not limiting the stroke length of the filling frame cylinder, the height of the molding space of the lower mold divided by the parting plate, the lower mold frame, the filling frame and the 2 nd extrusion plate is lower. Thus, a mold having a lower height is formed as compared with a case where the stroke length of the filling frame cylinder is not limited. Thus, the mold height changing means can change the mold height using the stopper.

In one embodiment, the stopper may include: a rod member having a 1 st end portion and a 2 nd end portion, the 1 st end portion being fixed to the packing frame, and the rod member being inserted into a through hole formed in a frame supporting the packing frame cylinder; and an abutting member attached to the 2 nd end of the rod member and abutting against the frame when the filling frame moves in a direction separating from the frame.

In the case of such a configuration, the rod-like member rises together with the filling frame. When the filling frame is raised by the length of the rod or more, the contact member attached to the 2 nd end of the rod abuts against the frame. In this way, the stopper portion can limit the stroke length of the filling frame cylinder to a predetermined length by the abutment of the abutment member with the frame.

In one embodiment, the following may be configured: the length from the frame to the rod-like member contact member when the filling frame is located at the closest position to the frame is shorter than the stroke length of the filling frame cylinder. With such a configuration, the stopper can limit the stroke length.

In one embodiment, the following may be configured: the filling frame cylinder body is a cylinder. It is difficult for the cylinder to be accurately stopped on the way of the stroke. The mold height changing means can be stopped accurately even in the middle of the stroke of the cylinder by using the stopper member.

In one embodiment, the following may be configured: the mold height changing means includes a position detection sensor connected to the control unit and detecting that the filling frame cylinder has been extended to a predetermined length. In the case of such a configuration, the position detection sensor can detect that the filling frame has moved to the position restricted by the stopper.

In one embodiment, the following may be configured: the mold height changing unit includes a spacer member attached to a main surface of the 1 st pressing plate facing the parting plate. In the case of such a configuration, the height of the molding space of the upper mold defined by the parting plate, the upper mold frame, and the 1 st squeeze plate becomes low. Thus, a mold having a lower height is formed as compared with a case where no spacer member is provided. Thus, the mold height changing means can change the mold height.

In one embodiment, the following may be configured: the material of the spacer member is resin. With such a configuration, the spacer member is provided which is difficult to deform and easy to mount.

In one embodiment, the following may be configured: the spacer member is fixed to the 1 st compression plate by screws. The spacer member can be fixed by a screw, and thus an operator can easily adjust the height of the mold.

In one embodiment, the following may be configured: the spacer member is fixed to the 1 st compression plate by a screw hole for attaching a liner provided in the 1 st compression plate. In the case of such a configuration, the operator can attach the spacer member without changing the frame-removing molding machine.

A frame-removing molding machine according to another aspect of the present disclosure includes: putting a mold frame; the lower die frame can clamp the parting plate together with the upper die frame; a filling frame which can be connected with the lower mold frame; the 1 st extrusion plate can get in and out relative to the upper die frame; a 2 nd extrusion plate which can move in and out relative to the filling frame; a filling frame cylinder which moves the filling frame relatively to the No. 2 extrusion plate; a pressing cylinder that integrally moves the filling frame, the 2 nd pressing plate, and the filling frame cylinder; a control unit for controlling the filling frame cylinder and the extruding cylinder; and a stopper portion for limiting a stroke length of the filling frame cylinder to a predetermined length.

In the frame-out molding machine, the 2 nd squeeze plate and the filling frame cylinder are integrally operated. The stroke length of the filling frame cylinder is limited to a predetermined length by the stopper. By limiting the stroke length of the filling frame cylinder by the stopper, the rising distance of the filling frame with respect to the 2 nd extrusion plate (the distance the filling frame can move toward the lower die frame) becomes short. Therefore, compared with the case of not limiting the stroke length of the filling frame cylinder, the height of the molding space of the lower mold divided by the parting plate, the lower mold frame, the filling frame and the 2 nd extrusion plate is lower. Thus, a mold having a lower height is formed as compared with a case where the stroke length of the filling frame cylinder is not limited. Thus, the mold height can be changed in the knock-out molding machine.

In one embodiment, the following may be configured: the frame-removing molding machine is provided with a position detection sensor which is connected to the control unit and detects that the filling frame cylinder has been extended to a predetermined length. In the case of such a configuration, the position detection sensor can detect that the filling frame has moved to the position restricted by the stopper.

In one embodiment, the following may be configured: the frame-removing molding machine includes a spacer member attached to a main surface of the 1 st squeeze plate facing the parting plate. In the case of such a configuration, the height of the molding space of the upper mold defined by the parting plate, the upper mold frame, and the 1 st squeeze plate becomes low. Thus, a mold having a lower height is formed as compared with a case where no spacer member is provided. Thus, the mold height changing means can change the mold height.

In one embodiment, the following may be configured: the spacer member is fixed to the 1 st compression plate by screws. By making it possible to fix the spacer member with a screw, the operator can easily adjust the mold height.

In one embodiment, the following may be configured: the frame-removing molding machine is provided with an input unit which is connected to a control unit and which is capable of selecting either a 1 st mode in which molding is performed without limiting the stroke length of the filling frame cylinder or a 2 nd mode in which molding is performed with the stroke length of the filling frame cylinder limited by the stopper. In the case of such a configuration, the input unit can receive a mode switching operation by the operator.

In one embodiment, the following may be configured: in mode 2, the molding is also performed using a spacer member attached to the main surface of the 1 st pressing plate facing the parting plate. In this way, in the 2 nd mode, the thickness of both the upper mold and the lower mold can be changed to be thin.

A frame-removing molding machine according to still another aspect of the present disclosure includes: putting a mold frame; the lower die frame can clamp the parting plate together with the upper die frame; a filling frame which can be connected with the lower mold frame; the 1 st extrusion plate can get in and out relative to the upper die frame; a 2 nd extrusion plate which can move in and out relative to the filling frame; a filling frame cylinder which moves the filling frame relatively to the No. 2 extrusion plate; a pressing cylinder that integrally moves the filling frame, the 2 nd pressing plate, and the filling frame cylinder; a control unit for controlling the filling frame cylinder and the extruding cylinder; a 1 st position detection sensor connected to the control unit and detecting that the filling frame cylinder has been extended to a 1 st length; the 2 nd position detection sensor is connected to the control unit and detects that the filling frame cylinder has extended to a 2 nd length shorter than the 1 st length, and the control unit is configured to be able to switch between a 1 st operation mode in which the filling frame cylinder is operated so as to extend to the 1 st length based on a detection result of the 1 st position detection sensor and a 2 nd operation mode in which the filling frame cylinder is operated so as to extend to the 2 nd length based on a detection result of the 2 nd position detection sensor.

In the frame-out molding machine, the 1 st position detection sensor detects that the filling frame cylinder has been extended to the 1 st length, and the 2 nd position detection sensor detects that the filling frame cylinder has been extended to the 2 nd length. Then, the control unit switches between a 1 st mode in which the filling frame cylinder is operated to extend to a 1 st length and a 2 nd mode in which the filling frame cylinder is operated to extend to a 2 nd length. In this way, the frame stripping molding machine can change the mold height using the position detection sensor.

Yet another aspect of the present disclosure is a method of changing a mold height of a drop frame molding machine. The frame-removing molding machine comprises: putting a mold frame; the lower die frame can clamp the parting plate together with the upper die frame; a filling frame which can be connected with the lower mold frame; the 1 st extrusion plate can get in and out relative to the upper die frame; a 2 nd extrusion plate which can move in and out relative to the filling frame; a 1 st filling frame cylinder for relatively moving the filling frame with respect to the 2 nd pressing plate; and a pressing cylinder that integrally moves the filling frame, the 2 nd pressing plate, and the filling frame cylinder. The mold height changing method includes a step of preparing a 2 nd filling frame cylinder having a stroke length different from a stroke length of the 1 st filling frame cylinder, and a step of exchanging the 1 st filling frame cylinder and the 2 nd filling frame cylinder.

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

Yet another aspect of the present disclosure is a method of changing a mold height of a drop frame molding machine. The frame-removing molding machine comprises: putting a mold frame; the lower die frame can clamp the parting plate together with the upper die frame; a filling frame which can be connected with the lower mold frame; the 1 st extrusion plate can get in and out relative to the upper die frame; a 2 nd extrusion plate which can move in and out relative to the filling frame; a 1 st filling frame cylinder for relatively moving the filling frame with respect to the 2 nd pressing plate; and a pressing cylinder that integrally moves the filling frame, the 2 nd pressing plate, and the filling frame cylinder. The mold height changing method includes any one of a step of attaching a spacer to a main surface of a 1 st compression plate facing a parting plate, a step of attaching a spacer to a main surface of the 1 st compression plate on a side opposite to the main surface facing the parting plate, and a step of exchanging the 1 st compression plate and a 3 rd compression plate having a thickness different from a thickness of the 1 st compression plate.

In this method, the mold height can be changed by attaching the spacer member to the 1 st compression plate or exchanging the 1 st compression plate and the 3 rd compression plate having a thickness different from that of the 1 st compression plate.

According to various aspects and embodiments of the present disclosure, there are provided a mold height changing unit, a frame-out molding machine, and a mold height changing method that can change a mold height.

Drawings

Fig. 1 is a front view showing an example of a frame-removing molding machine according to the embodiment.

Fig. 2 is a side view of the device of fig. 1.

Fig. 3 is a schematic enlarged view of the periphery of the lower compression plate of the apparatus of fig. 1.

Fig. 4 is a schematic enlarged view of the periphery of the upper frame cylinder of the apparatus of fig. 1.

Fig. 5 is a block diagram showing an electric system and an air-oil pressure system of the device of fig. 1.

Fig. 6 is a pneumatic-hydraulic circuit diagram of a frame-mounted squeeze cylinder drive mechanism of the device of fig. 1.

Fig. 7 is a flowchart showing a molding method.

Fig. 8 is a diagram showing a state where the pattern board shuttle in the modeling method enters the process end.

Fig. 9 is a diagram showing a state where the sand loading step in the molding method is completed.

Fig. 10 is a diagram showing a state where the extrusion step in the molding method is completed.

Fig. 11 is a diagram showing a state in which the mold releasing (drawing) step in the molding method is completed.

Fig. 12 is a diagram showing a state where the pattern board shuttle withdrawal step in the modeling method is completed.

Fig. 13 is a diagram showing a state where a mold clamping process in the molding method is completed.

Fig. 14 is a view showing a state where the upper mold is extracted from the upper mold frame in the frame removing step of the molding method.

Fig. 15 is a diagram showing a state where the framing removal step in the molding method is completed.

Fig. 16 is a diagram illustrating an example of the mounting position of the spacer member according to the embodiment.

Fig. 17 is a diagram illustrating an example of the mounting position of the stopper according to the embodiment.

Fig. 18 is a diagram illustrating an example of the mounting position of the stopper according to the embodiment.

Fig. 19 is a diagram illustrating a height of the molding space changed by the stopper according to the embodiment.

Fig. 20 is a diagram illustrating another example of the barrier according to the embodiment.

Fig. 21 is a plan view of an example of the position detection sensor.

Fig. 22 is a side view of an example of the position detection sensor.

Fig. 23 is a diagram showing a state where the sand loading step is completed when the height of the molding space is changed.

Fig. 24 is a diagram for explaining a method of changing the height of the molding space.

Fig. 25 is a diagram illustrating another example of the barrier according to the embodiment.

Detailed Description

Hereinafter, embodiments will be described with reference to the drawings. In the drawings, the same or corresponding portions are denoted by the same reference numerals, and redundant description is omitted. Hereinafter, the horizontal direction is defined as the X-axis and Y-axis directions, and the vertical direction (up-down direction) is defined as the Z-axis direction.

[ outline of the frame-removing Molding machine ]

Fig. 1 is a front view showing an example of a frame-removing molding machine according to the embodiment. The frame-removing molding machine 100 is a molding machine for molding an upper mold and a lower mold without a mold frame. As shown in fig. 1, the frame-removing molding machine 100 includes: a mold shaping section 100A for shaping a mold composed of an upper mold and a lower mold; a lower frame advancing/retreating drive section 100B for advancing and retreating the lower frame into and from the mold molding section 100A; a mold extrusion section 100C for extruding the mold molded in the mold molding section 100A to the outside; and a casting sand supply unit 100D for supplying casting sand to the casting mold unit 100A.

A box-shaped upper mold frame and a filling frame that can move in the vertical direction (Z-axis direction) are disposed in the mold forming section 100A. The lower frame advancing/retreating drive unit 100B introduces the parting plate and the lower frame on which the mold is placed between the upper frame and the filling frame of the mold shaping unit 100A. The upper mold frame, the lower mold frame, and the filling frame of the mold shaping unit 100A move so as to approach each other, and the upper mold frame and the lower mold frame sandwich the parting plate. The casting sand supply unit 100D fills the upper mold frame, the lower mold frame, and the filling frame with casting sand. The molding sand filled in the upper mold frame, the lower mold frame, and the filling frame is pressurized from the vertical direction by the squeezing mechanism provided in the mold molding section 100A, thereby forming the upper mold and the lower mold at the same time. Thereafter, the upper mold is pulled out from the upper mold frame, the lower mold is pulled out from the lower mold frame and the filling frame, and the upper mold and the lower mold are carried out to the outside of the apparatus through the mold extrusion part 100C. Thus, the split frame molding machine 100 molds the upper mold and the lower mold without the mold frame.

[ Molding modeling section 100A ]

Fig. 2 is a side view of the device of fig. 1. As shown in fig. 1 and 2, the frame-removing molding machine 100 includes a gate frame 1. The gate frame 1 is configured by integrally connecting four corners of a lower base frame 1a and an upper frame 1b in a plan view via vertical posts 1 c. The position surrounded by the pillar 1c is also referred to as a "modeling position".

Fig. 3 is a schematic enlarged view of the periphery of the lower compression plate of the apparatus of fig. 1. As shown in fig. 3, a frame is attached upward to the center of the upper surface of the lower base frame 1a, and a squeeze cylinder 2 (an example of a squeeze cylinder) is provided. A lower compression plate 4 (an example of the 2 nd compression plate) is attached to the end of the piston rod 2a of the frame-mounted compression cylinder 2 via an upper end 3a of the lower compression frame 3. The lower squeeze plate 4 is a plate-like member configured to be movable in and out of the lower mold frame to close and compress the mold sand filled in the lower molding space of the lower mold frame and the packing frame. The body 2b of the frame-installed extrusion cylinder 2 is inserted through an insertion hole 3c provided at the center of the lower end 3b of the lower extrusion frame 3. Sliding bushes (not shown) having a height of at least 10mm may be provided at four corners of the plane of the lower base frame 1a to maintain the horizontal state of the lower pressing frame 3.

Four lower packing frame cylinders 5 are vertically attached to the lower end portion 3b of the lower compression frame 3 so as to surround the frame and mount the compression cylinder 2. The lower packing frame cylinder 5 relatively moves the lower packing frame 6 with respect to the lower compression plate 4. As an example, the under fill frame cylinder 5 is a pneumatic cylinder. The lower filling frame cylinder 5 may also be a hydraulic cylinder or an electric cylinder. For example, the upper piston rod 5a of each lower packing frame cylinder 5 passes through an insertion hole 3d provided in the lower end portion 3b of the lower squeeze frame 3, and a lower packing frame 6 (an example of a packing frame) is attached to the end thereof. The lower filling frame 6 is a box-shaped frame body having an open upper end and a lower end, and the upper end thereof can be connected to the lower end of a lower mold frame described later.

The inner surface 6a of the lower filling frame 6 is formed in a tapered shape so that the inner space of the lower filling frame 6 becomes narrower downward, and the lower pressing plate 4 can be fitted into the lower filling frame 6 while maintaining an airtight state. The sidewall 6b of the lower filling frame 6 is provided with a casting sand introduction hole 6 c. A positioning pin 7 is provided on the upper surface of the lower filling frame 6.

As described above, the end of the piston rod 2a of the squeeze cylinder 2 is mounted on the frame, the lower squeeze plate 4 is attached via the upper end 3a of the lower squeeze frame 3, the lower filling frame cylinder 5 is attached to the lower end 3b of the lower squeeze frame 3, and the lower filling frame 6 is attached to the end of the piston rod 5a on the upper side of the lower filling frame cylinder 5. Therefore, when the piston rod 2a of the frame installation extrusion cylinder 2 is extended and contracted, the lower extrusion plate 4, the lower extrusion frame 3, the lower filling frame cylinder 5, and the lower filling frame 6 are integrally lifted or lowered at the same time.

When the piston rod 5a on the upper side of the lower filling frame cylinder 5 extends and contracts, the lower filling frame 6 is raised or lowered with respect to the lower squeeze plate 4. In this way, the lower filling frame 6 can be lifted independently and simultaneously with respect to the lower compression plate 4. That is, only the lower filling frame 6 can be lifted and lowered by the lower filling frame cylinder 5 independently of the lower compression plate 4, and if the lower compression plate 4 is lifted and lowered by the frame installation compression cylinder 2, the lower filling frame 6 can be lifted and lowered simultaneously with the lower compression plate 4.

Further, the descending end of the lower filling frame 6 that can move up and down is the home position (initial position). That is, the lower squeeze plate 4 moves upward relative to the lower packing frame 6 moving upward, and thereby moves to a predetermined position in the lower packing frame 6, thereby forming a molding space (sand packing space) together with the lower mold frame 23. The lower compression plate 4 is relatively moved upward compared to the lower filling frame 6, thereby performing a compression action, or returning to the home position.

Fig. 4 is a schematic enlarged view of the periphery of the upper frame cylinder of the apparatus of fig. 1. As shown in fig. 4, an upper pressing plate 8 (an example of the 1 st pressing plate) is fixedly provided on the lower surface of the upper frame 1b, and the upper pressing plate 8 is located at a position facing the upper side of the lower pressing plate 4. The upper squeeze plate 8 is a plate-like member configured to be movable in and out of the upper mold frame to close and compress the casting sand filled in the upper molding space of the upper mold frame. An upper frame cylinder 9 formed of an air cylinder is fixedly provided downward on the upper frame 1 b. An upper mold frame 10 is attached to the end of the piston rod 9a of the upper frame cylinder 9. The upper mold frame 10 is a box-shaped frame body having an upper end and a lower end opened.

The inner surface 10a of the upper mold frame 10 is formed in a tapered shape so that the inner space of the upper mold frame 10 becomes larger as it goes downward, and the upper squeeze plate 8 can be fitted while maintaining an airtight state. The sidewall 10b of the upper mold frame 10 is provided with a casting sand inlet 10 c.

As shown in fig. 1 and 2, a space S into which a lower mold frame 23 described later can enter and into which the lower mold frame 23 can be moved up and down is formed at an intermediate position between the upper extrusion plate 8 and the lower extrusion plate 4. A pair of running rails 11 extending in parallel in the left-right direction (the left-right direction is the same as the state shown in fig. 1) on the same horizontal plane are disposed inside the column 1 c.

[ lower frame advancing/retreating drive section 100B ]

As shown in fig. 1, the lower frame advancing/retreating drive portion 100B is disposed on the side of the column 1c (in the negative X direction in the embodiment of fig. 1).

The lower frame advancing/retreating drive unit 100B includes a shoe shuttle cylinder 21. The pattern plate shuttle cylinder 21 is a cylinder for moving a parting plate provided with pattern plates up and down forward and backward to a molding position and a standby position. A main plate 22 is attached to the end of the piston rod 21a of the pattern plate shuttle cylinder 21 in a horizontal state. The main plate 22 is attached to the distal end of the piston rod 21a so as to be spaced upward from the distal end of the piston rod 21 a.

A lower mold frame 23 is mounted on the lower surface of the main plate 22. The lower mold frame 23 is a box-shaped frame body having an upper end and a lower end opened, and capable of holding the parting plate together with the upper mold frame. A parting plate 24 having a mold on its upper and lower surfaces is attached to the upper surface of the main plate 22. The parting plate 24 is a plate-like member having a pattern on both surfaces of a die plate.

The main plate 22 includes roller arms 22a in a vertical state at four corners of a plane.

Flanged rollers

22b and 22c are disposed at the upper end and the lower end of each roller arm 22 a.

When the piston rod 21a of the shoe plate shuttle cylinder 21 is in the retracted state, the four lower flanged rollers 22c are rollably in contact with the pair of guide rails 25 along the pair of guide rails 25 extending in parallel in the left-right direction (X direction) on the same horizontal plane. When the piston rod 21a is in the forward state, the flanged roller 22c is separated from the pair of guide rails 25 and moves toward the inside of the column 1 c.

The four flanged rollers 22b on the upper side are configured as follows: when the piston rod 21a of the shoe shuttle cylinder 21 is in the retreated state, only the two right flanged rollers 22b ride on the left end portions of the pair of running rails 11 extending from the column 1c, and when the piston rod 21a is in the advanced state, the two left flanged rollers 22b also ride on the pair of running rails 11.

[ mold extrusion part 100C ]

As shown in fig. 1, the die extrusion portion 100C is disposed on the side of the column 1C (in the negative X direction in the embodiment of fig. 1). The die extrusion section 100C includes a die extrusion cylinder 31. The mold extrusion cylinder 31 is a cylinder for extruding the molded upper mold and lower mold to the outside of the apparatus. An extrusion plate 32 is connected to the end of a piston rod 31a of the mold extrusion cylinder 31.

[ casting Sand supply section 100D ]

As shown in fig. 1 and 2, the casting sand supply unit 100D is disposed in the upper frame 1 b. The casting sand supply unit 100D includes a casting sand supply port 41, a sand lock 42 for opening and closing the casting sand supply port 41, and an inflator 43 disposed below the sand lock 42. The distal end of the air-packing tank 43 is branched into two strands in the vertical direction to form a sand inlet 43a (fig. 8).

[ electric System and air-oil pressure System ]

Fig. 5 is a block diagram showing an electric system and an air-oil pressure system of the device of fig. 1. As shown in fig. 5, the electric system of the frame-removing molding machine 100 includes a sequencer 200 (an example of a control unit), and is configured by electrically connecting a touch panel 300 (an example of an input unit in fig. 1 and 2), solenoid valves SV1, SV2, SV3, SV5, SV6, SV7, SV8, and a stop valve CV to the sequencer 200. In addition, in the sequencer 200, electrically connected: various sensors 201 such as a sensor for detecting the return end (retreating end) of the mold extrusion cylinder, a pressure switch PS described later, a pressure switch for monitoring that the supplied compressed air is equal to or higher than a predetermined pressure, a reed switch or a proximity switch for confirming the advancing end and the returning end of each cylinder, and a proximity switch for monitoring that the mold does not become thick enough to have a predetermined thickness during extrusion.

The solenoid valves SV1, SV2, SV3 and the stop valve CV are components of the frame-mounted squeeze cylinder drive mechanism 400 shown in fig. 6, and will be described later. The solenoid valve SV5 is a solenoid valve that advances and retreats the piston rod 31a by supplying and discharging compressed air to and from the mold extrusion cylinder 31. The solenoid valve SV6 is a solenoid valve that advances and retracts the piston rod 21a by supplying and discharging compressed air to and from the template shuttle cylinder 21. The solenoid valve SV7 is a solenoid valve that feeds and discharges compressed air to and from the upper frame cylinder 9 to advance (lower) and retract (raise) the piston rod 9 a. The solenoid valve SV8 is a solenoid valve that feeds and discharges compressed air to and from the lower packing frame cylinder 5 to advance (raise) and retreat (lower) the piston rod 5 a.

[ frame-mounted extrusion cylinder drive mechanism ]

Fig. 6 is a pneumatic-hydraulic circuit diagram of a frame-mounted squeeze cylinder drive mechanism of the device of fig. 1. As shown in fig. 6, the frame-mounted squeeze cylinder driving mechanism 400 includes a compressed air source 401, an oil tank 402, and a pressurizing cylinder 403, and is configured by air-oil driving that is configured by a composite circuit of an air pressure circuit 404 and a hydraulic pressure circuit 405. The air-oil drive is a drive using a composite function of air pressure and oil pressure, which is used by converting air pressure into oil pressure. In the air oil drive, a dedicated oil pressure unit to which an oil pressure pump is applied is not used, and only a compressed air source is used.

(air pressure circuit 404)

The oil tank 402 has an air pressure chamber 402a in the upper part, and the air pressure chamber 402a is in a state of being communicated with either one of the compressed air source 401 and the atmosphere (the muffler 406) by a valve (1 st valve) V1 which is controlled in two positions in conjunction with a solenoid valve (1 st solenoid valve) SV 1. When not energized, the solenoid valve SV1 communicates the control port of the valve V1 with the muffler 407, holds the valve V1 in the non-operating state, and communicates the air pressure chamber 402a of the oil tank 402 with the muffler 406, thereby maintaining the inside of the air pressure chamber 402a at atmospheric pressure. When energized, the solenoid valve SV1 communicates the control port of the valve V1 with the compressed air source 401, holds the valve V1 in the operating state, and communicates the air pressure chamber 402a of the oil tank 402 with the compressed air source 401 to supply compressed air into the air pressure chamber 402 a.

The booster cylinder 403 is a booster cylinder using the pascal principle, and is a cylinder having a combined function of air pressure and oil pressure used by converting low-pressure air pressure into high-pressure oil pressure. In air oil drive, an oil pressure pump is not required, and only an air pressure source is used. The supercharge cylinder 403 includes a cylinder portion 403a and a piston portion 403 b. The cylinder part 403a has an upper air pressure chamber 403c and a lower hydraulic chamber 403d, and the area ratio of the cross-sectional area of the air pressure chamber 403c to the cross-sectional area of the hydraulic chamber 403d is set to a large value, for example, 10: 1. the piston 403b includes a large diameter piston 403g disposed in the air pressure chamber 403c of the cylinder 403a and dividing the air pressure chamber 403c into an upper air pressure chamber 403e and a lower air pressure chamber 403f, and a small diameter piston 403h extending downward from the large diameter piston 403g and having a tip end portion disposed in the hydraulic chamber 403 d. The area ratio is 10: 1, the booster cylinder 403 generates an oil pressure 10 times the compressed air pressure.

The upper air pressure chamber 403e of the booster cylinder 403 is in a state of being communicated with either the compressed air source 401 or the atmosphere (the muffler 408) by a valve (2 nd valve) V2a which is controlled in two positions in conjunction with a solenoid valve (2 nd solenoid valve) SV 2. When not energized, the solenoid valve SV2 communicates the control port of the valve V2 with the muffler 407, holds the valve V2a in the non-operating state, and communicates the upper air pressure chamber 403e of the booster cylinder 403 with the muffler 408, thereby maintaining the interior of the upper air pressure chamber 403e at atmospheric pressure. When energized, the solenoid valve SV2 communicates the control port of the valve V2a with the compressed air source 401, holds the valve V2a in the operating state, and communicates the upper air pressure chamber 403e with the compressed air source 401, thereby supplying compressed air into the upper air pressure chamber 403 e. A regulator 409 is disposed in an air pressure pipe between the compressed air source 401 and the valve V2 a.

The lower air pressure chamber 403f of the booster cylinder 403 is in a state of being communicated with either one of the compressed air source 401 and the atmosphere (the muffler 410) by a valve V2b which is controlled in two positions in conjunction with a solenoid valve SV 2. The solenoid valve SV2, when de-energized, communicates the control port of the valve V2b with the compressed air source 401, holds the valve V2b in the operating state, and communicates the lower air pressure chamber 403f of the booster cylinder 403 with the compressed air source 401, thereby supplying compressed air into the lower air pressure chamber 403 f. When energized, the solenoid valve SV2 communicates the control port of the valve V2b with the muffler 411, holds the valve V2a in the non-operating state, and communicates the lower air pressure chamber 403f with the muffler 410, thereby maintaining the interior of the lower air pressure chamber 403f at atmospheric pressure.

The frame installation extrusion cylinder 2 includes a main body portion (cylinder portion) 2b, a piston 2c provided inside the main body portion 2b, and a piston rod 2a extending upward from the piston 2c, and as described above, a lower extrusion plate 4 is connected to the tip of the piston rod 2 a. The body 2b has an upper air pressure chamber 2d and a lower hydraulic chamber 2e, and the piston 2c partitions the air pressure chamber 2d and the hydraulic chamber 2 e.

The air pressure chamber 2d of the frame-installed compression cylinder 2 is in a state of being communicated with either one of the compressed air source 401 and the atmosphere (muffler 407) by a solenoid valve (3 rd solenoid valve) SV 3. The solenoid valve SV3 communicates the air pressure chamber 2d with the muffler 407 when not energized, and maintains the inside of the air pressure chamber 2d at atmospheric pressure. When energized, the solenoid valve SV3 communicates the air pressure chamber 2d with the compressed air source 401, and supplies compressed air into the air pressure chamber 2 d.

(oil pressure circuit 405)

The hydraulic circuit 405 is configured to: the oil tank 402 is in fluid communication with the hydraulic chamber 2e of the frame-provided squeeze cylinder 2 via a hydraulic pipe 412, the speed controller SC and the stop valve CV are disposed in the middle of the hydraulic pipe portion 412a on the oil tank 402 side, the hydraulic chamber 403d of the booster cylinder 403 is in fluid communication with the hydraulic pipe portion 412b on the frame-provided squeeze cylinder 2 side, and the pressure switch PS is disposed in the hydraulic pipe portion 412b on the frame-provided squeeze cylinder 2 side. The pressure switch PS monitors that the hydraulic oil 402b in the oil pressure pipe portion 412b has reached a predetermined pressure.

The cutoff valves CV keep the oil tank 402 and the hydraulic chamber 2e of the frame-mounted squeeze cylinder 2 and the oil tank 402 and the hydraulic chamber 403d of the booster cylinder 403 in a cutoff state when no current is supplied. The stop valve CV is operated by compressed air pressure when energized, and maintains a state in which the oil tank 402 communicates with the hydraulic chamber 2e of the frame-mounted squeeze cylinder 2 and the oil tank 402 communicates with the hydraulic chamber 403d of the booster cylinder 403.

By using the two-speed control stop valve capable of adjusting the flow rate of the hydraulic oil for the stop valve CV, the frame-mounted extrusion cylinder 2 can be operated at two speeds, i.e., a high speed and a low speed with good response.

[ method of Forming a frame-off ]

Fig. 7 is a flowchart showing a molding method. The method of the mold release shown in the flowchart (a) includes a series of steps including a mold plate shuttling entrance step S1, a frame setting step S2, a sand setting step S3, an extrusion step S4, a mold release (stripping) step S5, a mold plate shuttling exit step S6, a mold closing step S7, a frame release step S8, and a mold extrusion step S9. First, the operation of the frame installation squeeze cylinder drive mechanism 400 will be described in correspondence with the above-described steps.

(beginning of the build)

At the start of molding, both solenoid valves SV1, SV2 are kept in a non-energized state, and both solenoid valve SV3 and stop valve CV are kept in an energized state. Since the solenoid valve SV3 is in the energized state, the piston 2c and the piston rod 2a of the frame-disposed compression cylinder 2 are at the lower end (descent end), and the lower compression plate 4 is held at the lower end (descent end). Since the cut-off valve CV is in the energized state, the oil tank 402 and the hydraulic chamber 2e of the frame-mounted squeeze cylinder 2 and the oil tank 402 and the hydraulic chamber 403d of the booster cylinder 403 are maintained in a fluid communication state.

(template shuttle entering step S1)

In the form shuttling step S1, as in the case of the molding start, both the solenoid valves SV1 and SV2 are kept in the non-energized state, and both the solenoid valve SV3 and the stop valve CV are kept in the energized state.

(frame setting step S2)

In the block setting process S2, energization to the solenoid valve SV1 is started, and energization to the solenoid valve SV3 is stopped. When the energization of the solenoid valve SV1 is started and the energization of the solenoid valve SV3 is stopped, the hydraulic oil 402b supplied to the hydraulic chamber 2e of the frame installation squeeze cylinder 2 raises the piston 2c, and the lower squeeze plate 4 is raised via the piston rod 2a, whereby the frame installation is performed.

(extrusion step S4)

In the pressing process S4, the energization to the solenoid valve SV1 and the stop valve CV is stopped, and the energization to the solenoid valve SV2 is started. When the current starts to flow to the solenoid valve SV2, the compressed air supplied into the upper air pressure chamber 403e of the booster cylinder 403 presses the large diameter piston portion 403 g. As the large diameter piston portion 403g descends, the small diameter piston portion 403h pushes out the hydraulic oil 402b in the hydraulic chamber 403 d. Since the extruded hydraulic oil 402b is supplied to the hydraulic chamber 2e in which the extrusion cylinder 2 is installed, the lower extrusion plate 4 is raised to perform the extrusion process. The pressing step S4 is completed when the pressure switch PS detects that the hydraulic oil 402b has reached a predetermined pressure.

(demolding (drawing) step S5)

In the mold release (stripping) step S5, the energization to the solenoid valve SV2 is stopped, and the energization to the solenoid valve SV3 and the stop valve CV is started. Since the energization of the solenoid valve SV2 is stopped, the piston portion 403b rises to the upper end (rising end). Since the energization of the shutoff valve CV is started, the fluid communication state is restored between the oil tank 402 and the hydraulic chamber 2e of the frame-installed squeezing cylinder 2 and between the oil tank 402 and the hydraulic chamber 403d of the booster cylinder 403.

When the energization of the solenoid valve SV2 is stopped and the energization of the solenoid valve SV3 and the stop valve CV is started, the piston 2c of the frame-mounted squeeze cylinder 2 is pressed by the compressed air pressure, and the hydraulic oil 402b in the hydraulic chamber 2e is pushed out. The pushed hydraulic oil 402b returns to the hydraulic chamber 403d of the booster cylinder 403 and the oil tank 402. Therefore, the piston 2c of the frame setting pressing cylinder 2 is lowered, and the piston portion 403b of the pressurizing cylinder 403 is raised.

(mold clamping step S7)

In the mold clamping step S7, similarly to the case of the frame setting step S2, the energization of the solenoid valve SV1 is first started, and the energization of the solenoid valve SV3 is stopped. In this state, the hydraulic oil 402b in the oil tank 402 is pushed out from the oil tank 402 by the pressing force of the compressed air supplied into the air pressure chamber 402a, and is supplied to the hydraulic pressure chamber 2e in which the compression cylinder 2 is provided via the speed controller SC and the stop valve CV. Therefore, the piston 2c of the frame setting pressing cylinder 2 rises.

(frame removing step S8)

In the framing off process S8, the energization to the solenoid valve SV1 is stopped, and the energization to the solenoid valve SV3 is started. Since the energization of the solenoid valve SV3 is started, the air pressure chamber 2d of the compression cylinder 2 is placed in communication with the compressed air source 401, and compressed air is supplied to the air pressure chamber 2 d. Therefore, the piston 2c of the frame installation pressing cylinder 2 is pressed by the compressed air pressure, and the hydraulic oil 402b in the hydraulic chamber 2e is pushed out. The extruded working oil 402b is returned to the oil tank 402. Therefore, the piston 2c of the frame setting pressing cylinder 2 is lowered.

Hereinafter, a series of steps of the frame removal molding method according to the embodiment will be described in the order of steps. The flowchart (B) shows the operation of the cylinder in each step.

(beginning of molding (FIGS. 1 to 4))

At the start of molding, in the mold molding section 100A, the piston rod 2a of the frame-mounted extrusion cylinder 2 is located at the retreated end, and the lower extrusion plate 4 is located at the lowered end. The piston rod 5a on the upper side of the lower filling frame cylinder 5 is located at the retreating end, and the lower filling frame 6 is located at the descending end. The piston rod 9a of the upper frame cylinder 9 is located at the advancing end, and the upper frame 10 is located at the lowering end.

In the lower frame advancing/retreating drive section 100B, the piston rod 21a of the template shuttle cylinder 21 is located at the retreating end, and the main plate 22, the lower frame 23, and the parting plate 24 are located at the retreating end.

In the die-extruding section 100C, the piston rod 31a of the die-extruding cylinder 31 is located at the retreated end, and the extruding plate 32 is located at the retreated end.

In the casting sand supply section 100D, casting sand 51 (fig. 8) is filled in the air-filled tank 43. The casting sand 51 is not limited to its kind, but is, for example, green sand using bentonite as a binder.

(template shuttle advancing step S1 (FIGS. 2 and 8))

In the shoe shuttle advancing step S1, the piston rod 21a of the shoe shuttle cylinder 21 is advanced. The main plate 22 moves forward by the forward movement of the piston rod 21a, and the two left-side flanged rollers 22b of the four upper-side flanged rollers 22b also ride on the pair of running rails 11, and the four lower-side flanged rollers 22c are separated from the pair of guide rails 25, and when the piston rod 21a moves forward to the forward end, the main plate 22, the lower mold frame 23, and the parting plate 24 are disposed at predetermined positions inside the column 1c of the mold shaping portion 100A. Fig. 8 is a diagram showing a state where the pattern board shuttle in the modeling method enters the process end.

(frame setting step S2 (FIG. 9))

The frame setting step S2 advances the piston rod 2a of the frame setting extrusion cylinder 2 to raise the lower extrusion plate 4, advances the lower filling frame cylinder 5 to raise the lower filling frame 6, inserts the positioning pin 7 of the lower filling frame 6 into a positioning hole (not shown) of the lower mold frame 23, and overlaps the lower filling frame 6 with the lower surface of the lower mold frame 23 to define a lower mold space closed by the lower extrusion plate 4, the lower filling frame 6, the lower mold frame 23, and the parting plate 24. Here, since the lower squeeze plate 4 is integrated with the lower squeeze frame 3, if the frame installation squeeze cylinder 2 is lifted, the lower squeeze frame 3 can be lifted together with the lower squeeze plate 4.

Next, the lower squeeze frame 3 and the lower squeeze plate 4 are integrally raised, the positioning pins 7 are inserted into the lower surface of the upper mold frame 10, and the lower mold frame 23 is superimposed on the lower surface of the upper mold frame 10 via the parting plate 24 and the main plate 22, thereby forming an upper mold space closed by the upper squeeze plate 8, the upper mold frame 10, and the parting plate 24. In this case, since the forward output of the frame setting pressing cylinder 2 is only required to be output with respect to the weight of the lifting structure, a relatively low-pressure cylinder can be used. Further, when the upper mold space is formed, the piston rod 2a of the frame setting extrusion cylinder 2 does not reach the advancing 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 air charging tank 43. Fig. 9 is a diagram showing a state where the sand loading step in the molding method is completed. In fig. 9, the state in which the upper mold space and the lower mold space are filled with the casting sand 51 is shown, but the frame setting process S2 is a state before the casting sand 51 is filled.

(Sand charging Process S3 (FIG. 9))

In the sand charging step S3, the sand lock 42 (fig. 2) is closed and compressed air is supplied to the air charging tank 43 in the casting sand supply unit 100D. The casting sand 51 in the air-packing tank 43 is introduced into the lower mold space through the lower sand introduction hole 43a and the casting sand introduction hole 6c of the lower packing frame 6 and is introduced into the upper mold space through the upper sand introduction hole 43a and the casting sand introduction hole 10c of the upper mold frame 10 by the air pressure of the compressed air. In the sand charging step S3, only the compressed air is discharged to the outside through the air discharge holes (not shown) provided in the side walls of the upper mold frame 10 and the lower mold frame 23.

(extrusion step S4 (FIG. 10))

In the extrusion process S4, the piston rod 2a of the frame-setting extrusion 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 pinched and extruded by the upper extrusion plate 8 and the lower extrusion plate 4. In the pressing step S4, the lower filling frame 6, the lower mold frame 23, the parting plate 24, and the upper mold frame 10 are also raised as the lower pressing plate 4 is raised. The upper mold 54 and the lower mold 55 are formed by the pressing step S4. Fig. 10 is a diagram showing a state where the extrusion step in the molding method is completed.

At the time of extrusion, the pressurizing cylinder 403 (fig. 6) is lowered to supply high-pressure hydraulic oil to the frame-installed extrusion cylinder 2, thereby molding an upper and lower mold having a predetermined hardness. After the start of the squeezing, the timing of stopping the lowering of the pressurizing cylinder 403 is performed by the pressure switch PS (fig. 6). The timing of stopping the pressurization (lowering) of the pressurization cylinder 403 is preferably set in the range from 0.1MPa to 21 MPa. If the pressure exceeds 21MPa, equipment having a pressure resistance of 21MPa or more is required, and therefore, the cost increases. On the other hand, in the case of less than 0.1MPa, the hardness for forming the mold cannot be obtained.

In the present embodiment, the pressure boost cylinder 403 is lowered from the start of the squeezing process to operate the frame installation squeeze cylinder 2 at a high pressure, but the pressure boost cylinder 403 may be moved forward (raised) at a low pressure while the pressure boost cylinder 403 is stopped at the beginning of the squeezing process, and then the pressure boost cylinder 403 may be operated. By operating the low pressure at the initial stage of the pressing, the stroke of the frame-provided pressing cylinder 2 for pressing at a high pressure can be shortened, and therefore the size of the booster cylinder can be made more compact.

Demolding (demolding) step S5 (FIG. 11)

In the mold releasing (drawing) step S5, the piston rod 2a of the frame-mounted extrusion cylinder 2 is retracted, and the lower extrusion plate 4 is lowered. As the lower squeeze plate 4 descends, the lower mold frame 23, the parting plate 24, the main plate 22, and the lower filling frame 6 also descend. In the middle of the lowering, the four flanged rollers 22b on the upper side of the main plate 22 ride on the pair of running rails 11, and the lowering of the main plate 22, the lower mold frame 23, and the parting plate 24 is stopped, and the lower squeeze plate 4 and the lower packing frame 6 continue to be lowered.

When the piston rod 2a of the frame-provided compression cylinder 2 is retracted, the pressure-increasing cylinder 403 (fig. 6) stops increasing (lowering) pressure, and the pressure-increasing cylinder 403 is raised at a low pressure and similarly operated at a low pressure. Further, the frame-installed pressing cylinder 2 may be operated at a low speed so that the product surface of the mold does not collapse when the parting plate is pulled out from the mold. Fig. 11 is a diagram showing a state in which the mold releasing (drawing) step in the molding method is completed.

(template shuttle withdrawing step S6 (FIG. 12))

In the pattern plate shuttle withdrawing step S6, when the four flanged rollers 22b on the upper side of the main plate 22 are caught on the pair of running rails 11 in the mold releasing (mold stripping) step S5, the main plate 22 is connected to the tip end of the piston rod 21a of the pattern plate shuttle cylinder 21.

In the shoe shuttle withdrawing step S6, the piston rod 21a of the shoe shuttle cylinder 21 is withdrawn to the withdrawal end. As the piston rod 21a retreats, the four flanged rollers 22b on the lower side of the main plate 22 ride on the pair of guide rails 25, and the two flanged rollers 22b on the left side of the four flanged rollers 22b on the upper side of the main plate 22 are separated from the pair of running rails 11, and the main plate 22, the lower mold frame 23, and the parting plate 24 return to the retreat end (home position). After the template shuttle withdrawal step S6 is completed, the core can be inserted into the inside of the column 1c, and the core can be inserted as needed. However, core placement is not necessary in this disclosure. Fig. 12 is a diagram showing a state where the pattern board shuttle withdrawal step in the modeling method is completed.

(mold clamping step S7 (FIG. 13))

In the mold clamping step S7, the piston rod 2a of the frame-mounted extrusion cylinder 2 is moved forward, the lower extrusion plate 4 is raised, and the lower mold 55 is brought into close contact with the lower surface of the upper mold 54. The advance of the frame setting extrusion cylinder 2 at this time is operated at a low pressure in a state where the pressurizing cylinder is stopped, in the same manner as in the frame setting step S2. In addition, it is preferable that the frame-mounted compression cylinder 2 is set at a low speed so that the mold does not collapse due to the impact of the close contact immediately before the upper mold 54 and the lower mold 55 are brought into close contact. Fig. 13 is a diagram showing a state where a mold clamping process in the molding method is completed.

(frame removal step S8 (FIGS. 14 and 15))

Fig. 14 is a view showing a state where the upper mold is extracted from the upper mold frame in the frame removing step of the molding method. In the frame removing step S8, as shown in fig. 14, the piston rod 9a (fig. 4) of the upper frame cylinder 9 (fig. 4) is retracted to raise the upper mold frame 10. The upper mold 54 is separated from the upper mold frame 10 by the ascent of the upper mold frame 10. After the frame is released, the piston rod 9a of the upper frame cylinder 9 is advanced to return the upper frame 10 to the lowered end (home position).

Next, the piston rod 2a of the frame-mounted pressing cylinder 2 is retracted, and the lower pressing plate 4 is returned to the lowered end (home position). 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 lowering end (home position). Fig. 15 is a diagram showing a state where the framing removal step in the molding method is completed.

In this case, the frame setting extrusion cylinder 2 is retracted, and the pressure-increasing cylinder is operated at a low pressure while being stopped, in the same manner as in the mold clamping step S7. Further, the frame installation extrusion cylinder 2 may be operated at a low speed so that the impact is not applied to the mold after the frame removal, immediately before the frame installation extrusion cylinder 2 reaches the descent end.

(mold extrusion step S9 (FIG. 1))

In the mold extrusion step S9, the piston rod 31a of the mold extrusion cylinder 31 is moved forward, the extrusion plate 32 is moved forward, and the molds (the upper mold 54 and the lower mold 55) on the lower extrusion plate 4 are sent out to the conveying line. Thereafter, the piston rod 31a of the mold extruding cylinder 31 is retracted to return to the original position.

In the above-described frame setting step S2, the mold releasing (mold stripping) step S5, the mold clamping step S7, and the frame stripping step S8, the output of the low-pressure operation for advancing or retracting the frame setting cylinder 2 may be from 0.1MPa to 0.6 MPa. The air oil drive described in the above is used for the frame setting pressing cylinder drive mechanism 400. In a general casting plant, the supply pressure of the compressed air source 401 is set to about 0.6 MPa. Although the pressure can be set to a pressure exceeding 0.6MPa, the capacity of the compressor needs to be improved. Therefore, from the viewpoint of energy saving, the pressure may be 0.6MPa or less. Further, when the pressure is lower than 0.1MPa, it is difficult to drive the frame installation extrusion cylinder 2 due to the weight of the driving object and the frictional resistance of the gasket and the like in the cylinder.

Further, the advance and retreat of the piston rod 21a of the shoe shuttle cylinder 21 are performed with an air pressure of from 0.1MPa to 0.6 MPa. As described above, the die plate shuttle cylinder 21 may be an air pressure of 0.1 to 0.6MPa, as long as it can advance and retreat the main plate 22, the lower die frame 23, and the parting plate 24. Since the supply pressure of the compressed air source in a general casting plant is about 0.6MPa as described above, the air pressure for operating the pattern plate shuttle cylinder 21 may be 0.6MPa or less from the viewpoint of energy saving. In addition, when the air pressure is lower than 0.1MPa, it is difficult to operate the pattern plate shuttle cylinder 21 due to the weight of the object to advance and retreat, frictional resistance in the cylinder, and the like.

In addition, the air pressure for advancing (raising) and retreating (lowering) the piston rod 5a of the lower filling frame cylinder 5 may be from 0.1MPa to 0.6 MPa. The lower filling frame cylinder 5 is used for lifting the lower filling frame 6, the lower mold frame 23, and the parting plate 24, and for releasing the lower mold from the lower filling frame 6, and therefore can operate with an air pressure of 0.1MPa to 0.6 MPa. Since the supply pressure of the compressed air source 401 in a general casting plant is about 0.6MPa, the air pressure for operating the under-filling frame cylinder 5 may be 0.6MPa or less from the viewpoint of energy saving. If the pressure is less than 0.1MPa, it is difficult to operate the under-fill frame cylinder 5 due to the weight of the object to be lifted and the frictional resistance in the cylinder.

[ means for changing the mold height ]

The above described drop frame molding machine 100 can mold only one height of the upper mold and the lower mold. The mold height changing means 500 that can be applied to the above-described frame-removing molding machine 100 will be described below.

(mold height changing means for the upper mold)

The mold height changing unit 500 may include a spacer member for changing the mold height. Fig. 16 is a diagram illustrating an example of the mounting position of the spacer member according to the embodiment. As shown in fig. 16, a spacer member 600 is attached to a lower surface 8c (an example of a main surface facing the parting plate 24) of the upper compression plate 8. The spacer member 600 is fixed to the lower surface 8c of the upper compression plate 8 by, for example, screws. In the case where a screw hole for attaching a liner (a liner-attaching screw hole) is formed in the lower surface 8c of the upper compression plate 8 to cope with wear, the spacer member 600 may be fixed to the upper compression plate 8 by the screw hole.

The material of the spacer member 600 is not particularly limited, but is, for example, resin. By forming the spacer member 600 from a resin, it becomes lighter than when it is formed from a metal, and therefore it is easy to install. The thickness of the spacer member 600 is not particularly limited, but is, for example, about 15mm to 75 mm. By providing the spacer member 600, the height of the molding space of the upper mold can be reduced by an amount corresponding to the thickness of the spacer member 600, and therefore the thickness of the upper mold can be reduced as a result.

(means for changing the height of the lower mold)

The mold height changing unit 500 may include a stopper for changing the height of the lower mold. Fig. 17 and 18 are diagrams illustrating an example of the mounting position of the stopper according to the embodiment. As shown in fig. 17 and 18, at least one stopper 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, two barrier portions 601 are provided at each of two opposite end portions of the under fill frame 6.

The stopper 601 includes a rod 602 and a contact member 603 as an example. The rod 602 has a 1 st end 602a and a 2 nd end 602 b. The 1 st end 602a is detachably attached to the lower filling frame 6. For example, the 1 st 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 packing frame cylinder 5 is fixed. The rod 602 extends below the lower filling frame 6 and is inserted into a through hole 3e formed in the lower compression frame 3 that supports the lower filling frame cylinder 5. The length (the projecting length L1) from the lower squeeze frame 3 to the contact member 603 of the rod 602 is shorter than the stroke length of the lower filling frame cylinder 5. More specifically, the length (the projection length L1) from the lower surface (the contact surface) of the lower squeeze frame 3 to the upper surface (the contact surface) of the contact member 603 of the rod 602 when the lower packing frame 6 is located at the closest position to the lower squeeze frame 3 is shorter than the stroke length of the lower packing frame cylinder 5. Further, the stroke length refers to a distance of sliding in one stroke of the cylinder, and is a distance from the top dead center to the bottom dead center.

The contact member 603 is attached to the 2 nd end 602b of the rod 602. The contact member 603 is detachable from the rod 602. The contact member 603 is a nut as an example, and is attached by being screwed to a male screw formed at the 2 nd end 602b of the rod 602. The contact member 603 has a size or shape that cannot pass through the through hole 3 e.

The rod 602 and the contact member 603 move together with the lower filling frame 6 by the lower filling frame cylinder 5. Therefore, when the lower filling frame 6 is moved by a length equal to or greater than the projecting length L1 in the direction of separating from the lower end portion 3b of the lower squeeze frame 3, the contact member 603 abuts against the lower squeeze frame 3. Thereby, the movement of the lower packing frame cylinder 5 in the extending direction is restricted, and the relative distance between the lower packing frame 6 and the lower squeeze frame 3 is restricted. This changes the height of the molding space.

Fig. 19 is a diagram illustrating a height of the molding space changed by the stopper according to the embodiment. The drawing on the left side of the chain line shows the extended end position of the lower filling frame cylinder 5 in the device in which the stopper 601 is not provided. The drawing on the right side of the chain line shows the extended end position of the lower filling frame cylinder 5 in the device provided with the stopper 601. As shown in the left side view, when the stopper 601 is not provided, the lower filling frame 6 is raised to the extended end position of the lower filling frame cylinder 5. Therefore, in the case where the stopper 601 is not provided, the molding operation is performed at the extended end of the lower filling frame cylinder 5. The height from the upper end of the lower filling frame 6 connected to the lower mold frame 23 to the lower squeeze plate 4 was H1.

As shown in the right-hand drawing, in the case where the stopper 601 is provided, the lower filling frame 6 is restricted in its upward movement by the stopper 601 before it rises to the extended end position of the lower filling frame cylinder 5. In more detail, the rise of the lower filling frame 6 is limited to the projection length L1. The height from the upper end of the lower filling frame 6 connected to the lower mold frame 23 to the lower squeeze plate 4 was H2. By providing the stopper 601, the height of the molding space of the lower mold is changed to be lower in accordance with the height H3 obtained by subtracting the height H2 from the height H1. Thereby, the thickness of the lower mold can be reduced as a result. Such a stopper 601 functions more effectively in the frame removal molding machine that does not control the position of the lower filling frame cylinder 5. The frame removing molding machine which does not perform the position control of the lower filling frame cylinder 5 has various advantages of simple structure, difficulty in occurrence of mechanical stop due to slight abnormality of the cylinder, and high position accuracy. On the other hand, the frame removing molding machine which does not control the position of the lower filling frame cylinder 5 has a disadvantage that the thickness of the mold cannot be changed, but the provision of the stopper 601 can eliminate only the disadvantage.

Hereinafter, the mode in which the stroke length of the lower filling frame cylinder 5 is not limited is referred to as a 1 st mode, and the mode in which the stroke length of the lower filling frame cylinder 5 is limited by the stopper 601 is referred to as a 2 nd mode. The mold height changing unit 500 may be connected to the sequencer 200, and may include a touch panel 300 capable of selecting any one of the 1 st mode and the 2 nd mode. In the mode 2, the spacer member 600 attached to the lower surface 8c of the upper compression plate 8 may be used.

(other examples of the mold height changing means for the lower mold)

The mold height changing unit 500 for the lower mold is not limited to the stopper 601. Fig. 20 is a diagram illustrating another example of the barrier according to the embodiment. As shown in fig. 20, the lower filling frame cylinder 5 has a blocking portion 611. At least one of the lower filling frame cylinders 5 of the frame removing molding machine 100 may have the stopper portion 611. As an example, all of the four lower filling frame cylinders 5 have the blocking portion 611. The stopper 611 limits the stroke length of the underfill frame cylinder 5 to a predetermined length, similarly to the stopper 601. That is, the frame-removing molding machine 100 can employ the stopper portion 611 instead of the stopper portion 601.

As an example, the stopper 611 has a rod 612 and an abutment 613. The rod-shaped member 612 has a 1 st end 612a and a 2 nd end 612 b. The 1 st end 612a of the rod 612 is provided at the lower end of the piston rod 5a of the lower filling frame cylinder 5 so that the rod 612 and the piston rod 5a of the lower filling frame cylinder 5 operate integrally. The 2 nd end 612b of the rod 612 is located below the lower filling frame cylinder 5. The rod-like member 612 enters the lower filling frame cylinder 5 as the piston rod 5a rises. The contact member 613 is attached to the 2 nd end portion 612b of the rod 612. The length (the projection length L2) from the lower end of the lower filling frame cylinder 5 to the abutment member 613 of the rod 612 is shorter than the stroke length of the lower filling frame cylinder 5. More specifically, the length (the projection length L2) from the lower end (the contact surface) of the lower filling frame cylinder 5 to the upper surface (the contact surface) of the contact member 613 of the rod-shaped member 612 when the lower filling frame 6 is located at the closest position to the lower squeeze frame 3 is shorter than the stroke length of the lower filling frame cylinder 5.

The contact member 613 is detachable from the rod 612. The contact member 613 is a nut, for example, and is attached by being screwed to a male screw formed in the 2 nd end portion 612b of the rod-like member 612. The abutment member 613 has a cross section larger than that of the rod-like member 612.

The rod 612 and the contact member 613 move together with the piston rod 5a of the lower filling frame cylinder 5. Therefore, when the piston rod 5a extends by the projecting length L2 or more, the contact member 613 abuts against the lower end of the lower packing frame cylinder 5. Thereby, the movement of the lower packing frame cylinder 5 in the extending direction is restricted, and the relative distance between the lower packing frame 6 and the lower squeeze frame 3 is restricted. This changes the height of the molding space.

A lining member 614 for preventing abrasion may be provided at the lower end of the lower stuffing frame cylinder 5. The rod-like member 612 and the piston rod 5a may be formed of a single member. That is, the lower filling frame cylinder 5 may be a so-called two-rod cylinder.

[ position detecting sensor ]

When the mold height changing means 500 is attached, the position of the extending end (top dead center) of the lower filling frame cylinder 5 is changed. Further, since the thickness of the mold becomes thin, the height position of mold clamping and the position of monitoring the thickness of the mold during extrusion are also changed. Therefore, when the mold height changing means 500 is provided, as an example of the sensor 201, a position detection sensor that detects an extended end (an example of a predetermined length) of the lower filling frame cylinder 5 after the mold height is changed, a monitoring position of the mold thickness after the mold height is changed, and a height position of mold clamping after the mold height is changed may be further added to the frame-removing molding machine 100. As the position detection sensor, a proximity sensor or a reed switch that is provided for each stop position and detects the position thereof, or an encoder that can always detect the position over a fixed range (movable range) can be used.

An example of an encoder will be described as an example of a representative position detection sensor. Fig. 21 is a plan view showing an example of the position detection sensor. Fig. 22 is a front view showing an example of the position detection sensor. As shown in fig. 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

members

62, 63 that move together with the lower filling frame 6. The magnet 60 may be directly attached to the lower filling frame 6. The magnet 60 is an annular member with a part cut out. The magnetic field detection unit 61 is formed of a long member attached to the column 1c as a fixed frame and extending in the vertical direction, and detects a magnetic field generated between the magnet 60 and the magnetic field detection unit. The magnetic field detection unit 61 is provided along the moving direction of the lower filling frame 6. The magnet 60 is disposed so that the magnetic field detection unit 61 is located inside. Since the magnet 60 moves together with the lower filling frame 6, the position detection sensor 70 can detect the height position (absolute position) of the lower filling frame 6 by detecting the magnetic field position.

The sand loading step S3 will be described as an example of the position detection. Fig. 23 is a diagram showing a state where the sand loading step is completed when the height of the molding space is changed. As shown in fig. 23, when the spacer 600 and the stopper 601 are installed as the mold height changing means 500, the heights of the molding space of the upper mold and the molding space of the lower mold are changed. Therefore, the position detection sensor 70 is provided so as to be able to detect the height position of the lower filling frame 6 after the change. Similarly, a position detection sensor 70 for monitoring may be additionally provided so that the mold does not become thick enough to have a certain thickness during extrusion.

[ control Using position detection sensor ]

The sensor 201 (including the position detection sensor 70) is connected to the sequencer 200. The sequencer 200 may also display the detection result of the position detection sensor 70 on the touch panel 300. For example, when monitoring is performed so that the mold does not have a thickness that does not satisfy a certain thickness during extrusion, an alarm or the like is output based on the detection result of the position detection sensor 70. The sequencer 200 may also display the monitoring results according to the monitoring mode. For example, in the 1 st monitoring mode, the sequencer 200 monitors only the mold height of the upper mold frame 10 and displays the monitoring result. In the 2 nd monitoring mode, the sequencer 200 monitors only the mold height of the lower mold frame 23 and displays the monitoring result. In the 3 rd monitoring mode, the sequencer 200 monitors the mold heights of the upper mold frame 10 and the lower mold frame 23 and displays the monitoring results. The touch panel 300 may display a screen on which the monitoring mode can be selected, and may be selected by the operator. As described above, when the mold height changing means 500 is attached, the monitoring position is changed. Therefore, the frame-removing molding machine 100 may be provided with the touch panel 300 that the operator can select whether or not to attach the mold height changing unit 500. When the operator selects the installation of the mold height changing unit 500, the sequencer 200 may display the monitoring result on the touch panel 300 based on a position detection sensor that detects the height position after the change.

[ other example 1 of the mold height changing method ]

The sequencer 200 may also change the mold height based on the position detection sensor. The sensor 201 (position detection sensor 70) described above includes, for example: a 1 st position detection sensor that detects when the lower filling frame cylinder 5 has extended to the extended end (an example of the 1 st length); and a 2 nd position detection sensor that detects that the lower filling frame cylinder 5 has been extended to a length shorter than the extended end (an example of the 2 nd length). The sequencer 200 is configured to be capable of switching between a 1 st operation mode in which the underfill frame cylinder 5 is operated so as to extend to the extension end based on the detection result of the 1 st position detection sensor, and a 2 nd operation mode in which the underfill frame cylinder 5 is operated so as to extend to a length shorter than the extension end based on the detection result of the 2 nd position detection sensor. When the sequencer 200 detects that the lower filling frame cylinder 5 has been extended to a length shorter than the extension end by the position detection sensor in the case of operating in the 2 nd operation mode, the lower filling frame cylinder 5 is stopped. This enables the mold height to be changed. Further, the sequencer 200 may add 1 or more other operation modes as needed. For example, the following may be configured: a3 rd position detection sensor is also provided, and the 3 rd action mode can be executed. In this case, as the 3 rd operation mode, the sequencer 200 operates the lower filling frame cylinder 5 so as to extend to the position detected by the 3 rd position detection sensor. Since the encoders of fig. 21 and 22 always perform position detection, it is possible to easily add an arbitrary number of operation modes without providing a new position detection sensor when the encoders of fig. 21 and 22 are used.

[ other example 2 of the mold height changing method ]

When the extension ends of the lower filling frame cylinder 5 are different, the mold height can be changed. Therefore, the mold height can be changed in the following procedure. First, a 2 nd filling frame cylinder having a stroke length different from that of the 1 st filling frame cylinder is prepared. Next, the 1 st and 2 nd filling frame cylinders are exchanged. According to such a procedure, the mold height can be easily changed.

[ other example 3 of the mold height changing method ]

Fig. 24 is a diagram for explaining a method of changing the height of the molding space. Element (a) in fig. 24 shows the positional relationship between the upper squeeze plate 8 and the upper mold frame 10 before the height of the upper molding space is changed. Hereinafter, a case where the height of the upper molding space is lowered by the height d1 will be described as an example. The mold height changing method includes, for example, a step of attaching the spacer member 600 having the thickness d1 to the lower surface 8c (the main surface facing the parting plate 24) of the upper squeeze plate 8. In this case, as shown in element (B) of fig. 24, the height of the above-ground modeling space is reduced in accordance with the thickness d1 of the spacer member 600. Alternatively, the mold height changing method may be such that an upper compression plate 8A (a 3 rd compression plate having a thickness different from the thickness of the 1 st compression plate) having a thickness d1 greater than that of the upper compression plate 8 is prepared and the upper compression plate 8A are exchanged with each other. In this case, as shown in element (C) of fig. 24, the height of the upper modeling space is reduced according to the difference d1 between the thicknesses of the upper squeeze plate 8 and the upper squeeze plate 8A. Alternatively, the mold height changing method may include a step of attaching the spacer member 600A having the thickness d1 to the upper surface 8d opposite to the lower surface 8c of the upper compression plate 8. In this case, as shown in element (D) of fig. 24, the height of the upper model space is reduced in accordance with the thickness D1 of the spacer member 600A. The mold height changing method includes any one of the steps of the above-described method.

[ summary of the embodiments ]

In the knock-out molding machine 100 targeted for the mold height changing unit 500, the lower squeeze plate 4 and the lower filling frame cylinder 5 operate integrally. The stopper 601 limits the stroke length of the lower filling frame cylinder 5 to a predetermined length. By limiting the stroke length of the lower filling frame cylinder 5 by the stopper 601, the rising distance of the lower filling frame 6 with respect to the lower compression plate 4 (the distance that the lower filling frame 6 can move toward the lower die frame 23) becomes short. This reduces the height of the molding space of the lower mold defined by the parting plate 24, the lower mold frame 23, the lower filling frame 6, and the lower squeeze plate 4, as compared with the case where the stroke length of the lower filling frame cylinder 5 is not limited. Thus, a mold having a lower height is formed, as compared with a case where the stroke length of the lower filling frame cylinder 5 is not limited. Thus, the mold height changing means 500 can change the mold height using the stopper 601.

By adjusting the height of the mold to be low, the mold sand can be saved, and therefore, the running cost can be reduced. Further, the height of the mold can be changed at low cost by attaching only the spacer member 600 or the stopper 601.

The above-described embodiment shows an example of the frame removal molding machine according to the present disclosure. The frame removing molding machine according to the present disclosure is not limited to the frame removing molding machine 100 according to the embodiment, and the frame removing molding machine 100 according to the embodiment may be modified or used in other apparatuses without changing the gist of the claims.

For example, the number of steps of the method in the above embodiment may be independent in order. That is, the operations can be performed in a different order from the order described.

Further, an air cylinder is used for the template shuttle cylinder 21 in the embodiment, but an electric cylinder may be used instead of the air cylinder. In the case of the electric cylinder, since the air pressure piping for the stencil shuttle cylinder 21 is not required, the structure is simple.

In the embodiment, the pressing force is applied from below to above, but the pressing force may be applied from above to below or in the horizontal direction.

In the above-described embodiment, the contact member 603 of the stopper 601 is not allowed to pass through the through hole 3e, but the present invention is not limited thereto. Fig. 25 is a diagram illustrating another example of the barrier according to the embodiment. As shown in element (a) of fig. 25, a through hole 3f having an asymmetric opening is formed in the lower end portion 3b of the lower squeeze frame 3. As shown in fig. 25 (B), the contact member 608 having an asymmetric shape conforming to the shape of the through hole 3f is attached to the 2 nd end portion 602B of the rod 602. The contact member 608 can be attached to rotate about the axis Z1 of the rod 602. With this configuration, the mold height can be changed simply by changing the orientation of the contact member 608.

Description of the reference numerals

2 … arranging an extrusion cylinder (extrusion cylinder); 4 … lower compression plate (2 nd compression plate); 5 … lower filling frame cylinder (filling frame cylinder); 6 … underfilling box (filling box); 8 … upper pressing plate (1 st pressing plate); 8a … upper pressing plate (3 rd pressing plate); 10 … putting on a mould frame; 21 … template shuttle cylinder; 23 … lower die frame; a 24 … parting plate; 51 … casting sand; 54 … casting on the mould; 55 … drag casting mould; 100 … frame-out molding machine; 500 … mould height changing unit; 600 … isolation component; 601. 611 … blocking the portion.

Claims

1. A mold height changing unit for use in a frame-off molding machine,

the frame-off molding machine comprises:

putting a mold frame;

the lower die frame can clamp the parting plate together with the upper die frame;

a filling frame which can be connected to the lower mold frame;

a 1 st squeeze plate which can be moved in and out with respect to the upper mold frame;

a 2 nd pressing plate which can be moved in and out with respect to the filling frame;

a filling frame cylinder that relatively moves the filling frame with respect to the 2 nd compression plate;

a pressing cylinder that integrally moves the filling frame, the 2 nd pressing plate, and the filling frame cylinder; and

a control section that controls the filling frame cylinder and the extruding cylinder,

the mold height changing means includes a stopper portion for limiting a stroke length of the filling frame cylinder to a predetermined length.

2. The mold height changing unit according to claim 1,

the blocking portion has:

a rod member having a 1 st end portion and a 2 nd end portion, the 1 st end portion being fixed to the packing frame, the rod member being inserted into a through hole formed in a frame supporting the packing frame cylinder; and

and an abutting member attached to the 2 nd end of the rod-shaped member and abutting against the frame when the filling frame moves in a direction separating from the frame.

3. The mold height changing unit according to claim 2,

the length from the frame to the contact member of the rod-like member when the filling frame is located at the closest position to the frame is shorter than the stroke length of the filling frame cylinder.

4. The mold height changing unit according to claim 1,

the blocking portion has:

a rod-shaped member having a 1 st end portion and a 2 nd end portion, the 1 st end portion being provided at a lower end of a piston rod of the stuffing frame cylinder, the 2 nd end portion being located below the stuffing frame cylinder, the rod-shaped member entering the stuffing frame cylinder as the piston rod rises; and

and an abutting member attached to the 2 nd end of the rod-shaped member and abutting against a lower end of the filling frame cylinder when the filling frame moves in a direction separating from a frame supporting the filling frame cylinder.

5. The mold height changing unit according to claim 4,

the length from the lower end of the filling frame cylinder to the contact member of the rod-like member when the filling frame is located at the closest position to the frame is shorter than the stroke length of the filling frame cylinder.

6. The mold height changing unit according to any one of claims 1 to 5,

the filling frame cylinder body is a cylinder.

7. The mold height changing unit according to any one of claims 1 to 6,

and a position detection sensor connected to the control unit and detecting that the filling frame cylinder has been extended to the predetermined length.

8. The mold height changing unit according to any one of claims 1 to 7,

and a spacer member attached to a main surface of the 1 st pressing plate facing the parting plate.

9. The mold height changing unit according to claim 8,

the material of the spacer member is resin.

10. The mold height changing unit according to claim 8 or 9,

the isolation component is fixed on the 1 st extrusion plate through a screw.

11. The mold height changing unit according to claim 10,

the spacer member is fixed to the 1 st compression plate by a screw hole for attaching a liner provided in the 1 st compression plate.

12. A frame-removing molding machine, wherein,

the frame-removing molding machine comprises:

putting a mold frame;

a filling frame which can be connected to the lower mold frame;

a pressing cylinder that integrally moves the filling frame, the 2 nd pressing plate, and the filling frame cylinder;

a control unit that controls the filling frame cylinder and the extrusion cylinder; and

and a stopper portion for limiting a stroke length of the filling frame cylinder to a predetermined length.

13. The frame-out molding machine of claim 12,

the blocking portion has:

14. The frame-off molding machine of claim 13,

15. The frame-out molding machine according to any one of claims 12 to 14,

the filling frame cylinder body is a cylinder.

16. The frame-out molding machine according to any one of claims 12 to 15,

17. The frame-out molding machine according to any one of claims 12 to 16,

18. The frame-off molding machine of claim 17,

the material of the spacer member is resin.

19. The frame-out molding machine of claim 17 or 18,

the isolation component is fixed on the 1 st extrusion plate through a screw.

20. The frame-off molding machine of claim 19,

21. The frame-out molding machine according to any one of claims 12 to 20,

the molding machine is provided with an input unit which is connected to the control unit and which can select either a 1 st mode in which molding is performed without limiting the stroke length of the filling frame cylinder or a 2 nd mode in which molding is performed in a state in which the stroke length of the filling frame cylinder is limited by the stopper.

22. The frame-off molding machine of claim 21,

in the 2 nd mode, the molding is performed by using a spacer member attached to a main surface of the 1 st pressing plate facing the parting plate.

23. A frame-removing molding machine, wherein,

the frame-removing molding machine comprises:

putting a mold frame;

a filling frame which can be connected to the lower mold frame;

a control unit that controls the filling frame cylinder and the extrusion cylinder;

a 1 st position detection sensor connected to the control unit and detecting that the filling frame cylinder has been extended to a 1 st length; and

a 2 nd position detection sensor connected to the control unit and detecting that the filling frame cylinder has been extended to a 2 nd length shorter than the 1 st length,

the control unit is configured to be capable of switching between a 1 st operation mode in which the filling frame cylinder is operated to extend to the 1 st length based on a detection result of the 1 st position detection sensor and a 2 nd operation mode in which the filling frame cylinder is operated to extend to the 2 nd length based on a detection result of the 2 nd position detection sensor.

24. A method for changing the height of a mold in a frame-removing molding machine,

the frame-off molding machine comprises:

putting a mold frame;

a filling frame which can be connected to the lower mold frame;

a 1 st filling frame cylinder that relatively moves the filling frame with respect to the 2 nd pressing plate; and

a pressing cylinder moving the filling frame, the 2 nd pressing plate, and the filling frame cylinder integrally,

the mold height changing method includes:

a step of preparing a 2 nd filling frame cylinder having a stroke length different from that of the 1 st filling frame cylinder, and

exchanging the 1 st filling frame cylinder and the 2 nd filling frame cylinder.

25. A method for changing the height of a mold in a frame-removing molding machine,

the frame-off molding machine comprises:

putting a mold frame;

a filling frame which can be connected to the lower mold frame;

the mold height changing method includes any one of the following steps:

a step of attaching a spacer to a main surface of the 1 st pressing plate facing the parting plate,

A step of attaching a spacer member to a main surface of the 1 st pressing plate on a side opposite to the main surface facing the parting plate, and

a step of exchanging the 1 st compression plate and a 3 rd compression plate having a thickness different from that of the 1 st compression plate.