JP2005305522A - Molding apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a molding apparatus capable of increasing the strength of a mold, particularly the strength on the outer wall face side of the mold. <P>SOLUTION: The molding apparatus is provided with: a pattern body 1 having pattern faces 11, 12 of forming die faces by transfer; frames 21, 22 arranged on the sides of the pattern faces 11, 12 in the pattern body 1; and pressurizing bodies 31, 32 of pressurizing casting sand packed into spaces 28, 29 formed by the inner wall faces 21c, 22c of the frames 21, 22 and the pattern faces 11, 12 in the pattern body 1 toward the pattern body 1. Movable parts 41, 42 are provided so as to be located on the side of the pattern body 1 between the frames 21, 22 and the pattern body 1, and can move to the pressurizing directions (the directions of the arrows Y1, Y2) in accordance with the pressurization of the casting sand by the pressurizing bodies 31, 32. The movable parts 41, 42 are contacted with the casting sand on the side of the pattern body 1 and move the casting sand together with them. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a mold making apparatus for making a frameless mold or the like into which a molten metal is poured.

Conventionally, Patent Document 1 discloses a mold making apparatus for making a frameless mold. The mold making apparatus includes a pattern body having a first pattern surface and a second pattern surface on the front and back surfaces to form a mold surface by transfer, a first frame disposed on the first pattern surface side of the pattern body, The casting sand loaded in the first space formed by the second frame disposed on the second pattern surface side, the inner wall surface of the first frame and the first pattern surface of the pattern body is pressurized toward the pattern body. A first pressurizing body, and a second pressurizing body that pressurizes the casting sand loaded in the second space formed by the inner wall surface of the second frame and the second pattern surface of the pattern body toward the pattern body. Have.
Japanese Patent Publication No. 2-18175

  According to the mold making apparatus described above, the casting sand loaded in the first space formed by the inner wall surface of the first frame and the first pattern surface of the pattern body is pressed by the pressure surface of the first pressure body. However, the compression of the cast sand at the portion facing the first pattern surface of the pattern body present at a position away from the pressure surface of the first pressure body is not necessarily sufficient. For this reason, there has been a limit to the increase in the packing density of casting sand and the strength of the mold. In particular, in a frameless mold, there is no casting frame that reinforces the outer wall surface of the mold, so there is a limit to the increase in strength on the outer wall surface side of the mold. The same applies to the casting sand loaded in the second space formed by the inner wall surface of the second frame and the second pattern surface of the pattern body.

  As described above, in the mold formed by the conventional technique, there is a limit in improving the strength of the outer wall surface of the mold. Therefore, the projected size of the outer wall surface of the mold needs to be larger than a predetermined value with respect to the projected size of the casting cavity. there were. Alternatively, if the projected size of the outer wall surface of the mold is the same, it is necessary to reduce the projected size of the casting cavity.

  The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a mold making apparatus capable of further increasing the strength of the mold, in particular, further increasing the strength on the outer wall surface side of the mold. And

The mold making apparatus according to the first aspect of the present invention includes a pattern body having a pattern surface that forms a mold surface by transfer, a frame disposed on the pattern surface side of the pattern body, an inner wall surface of the frame, and the pattern In a mold making apparatus comprising a pressurizing body that pressurizes casting sand loaded in a space formed by the pattern surface of a body toward the pattern body,
Between the frame and the pattern body, it is provided on the pattern body side and is in contact with the casting sand on the pattern body side in the space, and is movable in the pressurizing direction with the pressurization by the pressurizing body. It has a movable part.

  According to the mold making apparatus according to the first aspect of the present invention, the pressing body moves toward the pattern body in a state where the casting sand is loaded in the space formed by the inner wall surface of the frame and the pattern surface of the pattern body. Then, the casting sand is compressed to form a mold. Thus, when the movable part moves in the pressurizing direction along with the pressurization by the pressurizing body, the cast sand near the pattern body in the casting sand moves in the pressurizing direction due to the moving movement together with the movable part. As a result, during molding, the cast sand close to the pattern body also moves in the pressing direction, the casting sand filling density increases, and the strength of the mold increases.

The mold making apparatus according to the present invention of aspect 2 includes a first pattern surface provided on one surface and forming a first mold surface by transfer, and a second pattern provided on the other surface and forming a second mold surface by transfer. A pattern body having a surface, a first frame disposed on the first pattern surface side of the pattern body, a second frame disposed on the second pattern surface side of the pattern body, and the first frame A first pressurizing body that presses casting sand loaded in a first space formed by an inner wall surface of the pattern body and the first pattern surface of the pattern body toward the pattern body, and an inner wall surface of the second frame And a second pressure body that pressurizes the casting sand loaded in the second space formed by the second pattern surface of the pattern body toward the pattern body,
Between the at least one of the first frame and the second frame and the pattern body, it is provided on the pattern body side and is in contact with the casting sand on the pattern body side of the space, and is cast by the one. It has a movable part which can move to the pressurization direction with pressurization of sand.

  According to the mold making apparatus according to the second aspect of the present invention, the first pressurization is performed in the state where the casting sand is loaded in the first space formed by the inner wall surface of the first frame and the first pattern surface of the pattern body. When the body moves toward the pattern body, the casting sand is compressed to form the first mold. In addition, when the second pressurizing body moves toward the pattern body in a state where the casting sand is loaded in the second space formed by the inner wall surface of the second frame and the second pattern surface of the pattern body, Compressed to form a second mold.

  The movable part provided between at least one of the first frame and the second frame and the pattern body moves in the pressurizing direction with the pressing of the cast sand by the one. Thus, when a movable part moves to a pressurization direction, the cast sand close | similar to a pattern body will move to a pressurization direction by a movement with a movable part among casting sand. As a result, at the time of molding, the casting sand close to the pattern body also moves in the pressing direction, the casting sand filling density increases, and the strength of the mold increases.

The mold making apparatus according to the present invention of aspect 3 includes a pattern body having a pattern surface for forming a mold surface by transfer, a frame disposed on the pattern surface side of the pattern body, an inner wall surface of the frame, and the pattern In a mold making apparatus comprising a pressurizing body that pressurizes casting sand loaded in a space formed by a pattern surface of a body toward the pattern body,
Between the frame and the pattern body, it is provided on the pattern body side and is in contact with the casting sand on the pattern body side in the space, and is movable in the pressurizing direction with the pressurization by the pressurizing body. Retractable switchable between a movable part and a first form that exists between the frame and the pattern body together with the movable part and a second form that forms a retreat space for retracting the movable part moving in the pressurizing direction. And a movable part.

  According to the mold making apparatus according to the aspect 3 of the present invention, the pressing body moves toward the pattern body in a state where the casting sand is loaded in the space formed by the inner wall surface of the frame and the pattern surface of the pattern body. Then, the casting sand is compressed to form a mold. Further, since the retractable movable part is switched from the first form to the second form and the retracted space is formed, the movable part moves in the pressurizing direction and retracts into the retracted space in accordance with the pressurization by the pressurizing body. Thus, when a movable part moves to a pressurization direction, the cast sand close | similar to a pattern body will move to a pressurization direction by a movement with a movable part among casting sand. As a result, during molding, the cast sand close to the pattern body also moves in the pressing direction, the casting sand filling density increases, and the strength of the mold increases.

  According to the mold making apparatus according to the present invention, as described above, when the movable part in contact with the casting sand in the space moves in the pressurizing direction, the casting sand near the pattern body in the casting sand in the space. It moves in the pressurizing direction by moving along with the movable part. As a result, at the time of molding, the casting sand close to the pattern body can also move in the pressurizing direction, the casting sand filling density can be increased, and the strength on the pattern body side of the mold can be increased.

  In particular, since the movable part is disposed on the outer wall surface side of the mold, the strength of the outer wall surface of the mold can be increased. Thus, since the intensity | strength at the outer wall surface side of a casting_mold | template can be increased, the projection size of the outer wall surface of a casting_mold | template can be suppressed, ensuring the projection size of a casting cavity. Alternatively, the projection size of the casting cavity can be increased while suppressing an increase in the projection size of the outer wall surface of the mold.

  Furthermore, according to the mold making apparatus according to the present invention, since the dimension of the space formed by the inner wall surface of the frame and the pattern body is increased corresponding to the movable part, The compression allowance can be increased, and the strength of the mold can also be increased in this sense.

  The movable portion is in contact with the foundry sand in the space between the frame and the pattern body, and is movable in the pressurizing direction with pressurization by the pressurizing body. When the movable part moves, the casting sand in contact with the movable part moves together with the movable part. Therefore, the casting sand close to the pattern body can also move in the pressurizing direction, increase the casting sand filling density, and increase the strength on the pattern body side of the mold. The structure of the movable part is not particularly limited, and may be a frame shape, a plate shape, or the like.

  The pattern body includes a pattern plate having a pattern surface that forms a mold surface by transfer, and a pattern holding portion that holds the pattern plate. The form which has the evacuation space which evacuates the movable part which moves to can be illustrated. Here, the space outside the pattern body may be used as the retreat space.

  The retracting direction of the movable part can be a direction along the pressurizing direction by the pressurizing body or a direction crossing the pressurizing direction by the pressurizing body.

  An example in which return means for returning the movable part to the original position when the pressurization by the pressurizing body is released can be exemplified. The return means can be formed using at least one of a biasing member such as a spring, a cylinder device such as air pressure or hydraulic pressure, and a motor device. When the cylinder device and the motor device are driven, the movable portion can be returned to the original position.

  The return means moves the escape member in a direction that intersects the direction in which the movable portion retracts when the movable portion retracts, and the direction in which the movable portion returns when the force for retracting the movable portion is released. A mode having a return drive source to be activated can be exemplified. Examples of the return drive source include at least one of a biasing member such as a spring, a cylinder device such as air pressure or hydraulic pressure, and a motor device.

  Embodiment 1 of the present invention will be specifically described below with reference to FIGS. Each figure is a conceptual diagram, and does not define the size of details. FIG. 1 shows the initial position of the mold making apparatus. The mold making apparatus according to the present embodiment is a mold making apparatus for making a horizontally divided unframed mold, and includes a first pattern surface 11 provided on one surface and a second pattern surface 12 provided on the other surface. A pattern body 1 which is a model having As shown in FIG. 1, the mold making apparatus is arranged on a first frame 21 (upper frame) arranged on the first pattern surface 11 side of the pattern body 1 and on a second pattern surface 12 side of the pattern body 1. The casting sand loaded in the first space 28 formed by the second frame 22 (lower frame), the inner wall surface 21c of the first frame 21 and the first pattern surface 11 of the pattern body 1 is directed toward the pattern body 1. The first pressurizing body 31 having the first pressurizing surface 31a to be pressed, the casting loaded in the second space 29 formed by the inner wall surface 22c of the second frame 22 and the second pattern surface 12 of the pattern body 1 A second pressurizing body 32 having a second pressurizing surface 32a for pressurizing the sand toward the pattern body 1;

  As shown in FIG. 1, the first frame 21 has a pressed surface 21a that is an upper surface, a pushing surface 21b that is a lower surface, and an inner wall surface 21c. The second frame 22 has a pressed surface 22a that is a lower surface, a pushing surface 22b that is an upper surface, and an inner wall surface 22c. The first pressurizing body 31 is moved up and down by a first pressurizing cylinder 37 (hydraulic cylinder or pneumatic cylinder) as a first drive source, and the second pressurizing body 32 is a second pressurizing cylinder as a second drive source. It is raised and lowered by 38 (hydraulic cylinder or pneumatic cylinder). The first pressure body 31 integrally has a protruding first pressure portion 35 on the outer surface side, and the second pressure body 32 integrally has a protruding second pressure portion 36 on the outer surface side. .

  The pattern body 1 described above includes a pattern plate 10 having a first pattern surface 11 and a second pattern surface 12 for template transfer, and a pattern holding portion 13 having a frame shape for holding an outer edge portion of the pattern plate 10. The pattern plate 10 is held by the pattern holding unit 13 by the fasteners 14.

  The pattern holding unit 13 is equipped with a frame-shaped first movable unit 41 so as to be positioned on the first pattern surface 11 side. The first movable portion 41 is provided so that the inner wall surface 41 c can come into contact with the casting sand loaded in the first space 28 between the first frame 21 and the pattern body 1. The pattern holding part 13 is equipped with a frame-shaped second movable part 42 so as to be positioned on the second pattern surface 12 side. The second movable portion 42 is provided so that the inner wall surface 42 c can come into contact with the casting sand loaded in the second space 29 between the second frame 22 and the pattern body 1.

  As shown in FIG. 1, FIG. 2, and FIG. 3, the pattern holding unit 13 can accommodate the first movable unit 41 and can retract the first movable unit 41 and the second movable unit 42. And a concave second retreat space 16 in which the second movable portion 42 can be retreated. The first evacuation space 15 and the second evacuation space 16 have a frame shape. As shown in FIG. 2, a first urging spring 17 is provided in the first evacuation space 15. The first biasing spring 17 functions as a return means that can return the first movable part 41 retracted to the first retracting space 15 to the original position when the force for retracting the first movable part 41 is released. As shown in FIG. 3, when a pushing force is applied to the first movable portion 41 by the first frame 21, the first movable portion 41 is elastically contracted so that the urging force is accumulated in the first urging spring 17. Retreats into the concave first retreat space 15. Similarly to the first urging space 15 provided with the first urging spring 17, the second urging space 16 is also provided with the second urging spring 18 as shown in FIG. 1. The second urging spring 18 functions as a return means that can return the second movable part 42 retracted to the second retracting space 16 to the original position when the force for retracting the second movable part 42 is released. The first urging spring 17 and the second urging spring 18 are not limited to coil springs, and may be leaf springs, disc springs, or the like, and are not particularly limited, and the positions to be provided are not particularly limited. In short, the first urging spring 17 and the second urging spring 18 return the first retracting space 15 and the first movable portion 41 and the second movable portion 42 retracted to the second retracting space 16 to their original positions. It only needs to function as a means.

  Further, as shown in FIG. 1, the mold making apparatus guides and moves the first guide 51 extended in the vertical direction and the second frame 22 so that the first frame 21 can be guided and moved. And a second guide 52 extending in the vertical direction.

  Next, a case where a mold is formed will be described. First, at the initial position shown in FIG. 1, the first frame 21 and the second frame 22 are separated in the vertical direction. In this state, the pattern body 1 enters between the first frame 21 and the second frame 22 from the direction of arrow A1 (direction intersecting with the pressurizing direction). In this initial position, the first movable portion 41 faces the pushing surface 21b of the first frame 21 and the first retracting space 15, and the second movable portion 42 is pushed by the pushing surface 22b and the second retracting space 16 of the second frame 22. Face to face. Then, as shown in FIG. 4, the first guide 51 and the second guide 52 relatively approach each other to sandwich the pattern body 1, and the first frame 21 contacts the first movable portion 41 and the second The frame 22 abuts on the second movable part 42. In this state, as shown in FIG. 4, the first space 28 is formed by the inner wall surface 21 c of the first frame 21 and the first pattern surface 11 of the pattern body 1, and the inner wall surface 22 c of the second frame 22 and the pattern are formed. A second space 29 is formed with the second pattern surface 12 of the body 1. Then, casting sand is loaded into the first space 28 and the second space 29 by a casting sand loading device (not shown).

  Thus, in a state where the casting sand is loaded in the first space 28 and the second space 29, the inner wall surface 41 c of the first movable portion 41 is in contact with the casting sand and the inner wall surface of the second movable portion 42. 42c is in contact with the casting sand. In this state, the first pressure body 31 moves in the direction of arrow Y1 (downward, first pressure direction) toward the pattern body 1, and the second pressure body 32 moves toward the pattern body 1 using the arrow Y2. Move in the direction (upward direction, second pressing direction). As a result, as shown in FIG. 5, the cast sand in the first space 28 is compressed in the pressurizing direction by the first pressurizing surface 31a of the first pressurizing body 31, and the first mold 61 is formed. The second pressing surface 32a of the two pressing bodies 32 compresses the casting sand in the second space 29 in the pressing direction to form the second mold 62. The first mold 61 has a first mold surface 61a to which the first pattern surface 11 of the pattern body 1 has been transferred, and the second mold 62 has a second mold surface 62a to which the second pattern surface 12 of the pattern body 1 has been transferred. Have

  When pressing the casting sand as described above, as shown in FIG. 5, the first pressure surface 35a of the first frame 21 is pressurized by the first pressure portion 35 of the first pressure body 31, and the arrow Y1. The second pressure surface 36a of the second frame 22 is pressurized by the second pressure member 36 of the second pressure body 32 and moves in the direction of arrow Y2. As a result, while the inner wall surface 41c of the first movable part 41 is in contact with the casting sand, the first movable part 41 moves in the direction of the arrow Y1 (pressure direction) and retracts to the first retreat space 15, and the second movable part. While the inner wall surface 42c of the portion 42 is in contact with the casting sand, the second movable portion 42 moves in the direction of arrow Y2 (pressure direction) and retracts into the second retreat space 16.

  Thus, when the 1st movable part 41 moves to a pressurization direction (arrow Y1 direction), the casting sand which is contacting the inner wall surface 41c of the 1st movable part 41, ie, the 1st pattern surface 11 of the pattern body 1, is applied. Near casting sand moves in the pressurizing direction (arrow Y1 direction) together with the first movable portion 41 by the movement. As a result, the casting sand filling density of the first mold 61 increases, and the strength of the first mold 61 increases. Similarly, when the second movable portion 42 moves in the pressurizing direction (the direction of the arrow Y2), the cast sand that is in contact with the inner wall surface 42c of the second movable portion 42, that is, the second pattern surface 12 of the pattern body 1 is applied. Near casting sand moves in the pressurizing direction (arrow Y2 direction) together with the second movable portion 42 by the movement. As a result, the casting sand filling density of the second mold 62 increases, and the strength of the second mold 62 increases. The retracting direction of the first movable part 41 is a direction along the pressurizing direction by the first pressurizing body 31, and the retracting direction of the second movable part 42 is a direction along the pressurizing direction by the second pressurizing body 32. It is.

  After forming the first mold 61 and the second mold 62 as described above, by moving at least one of the first frame 21 and the second frame 22, as shown in FIG. The first mold 61 and the second mold 62 of the second frame 22 are relatively separated from each other. As a result, the first mold surface 61 a of the first mold 61 is released from the first pattern surface 11 of the pattern body 1, and the second mold surface 62 a of the second mold 62 is separated from the second pattern surface 12 of the pattern body 1. Type. Here, the first mold surface 61a of the first mold 61 is formed by transferring the first pattern surface 11, and the second mold surface 62a of the second mold 62 is formed by transferring the second pattern surface 12. Yes.

  Thereafter, as shown in FIG. 7, the pattern body 1 is retracted in the direction of arrow A <b> 2 (direction intersecting the pressurizing direction) with the first frame 21 and the second frame 22 being relatively separated from each other. Then, as shown in FIG. 8, by pressing the first pressurizing body 31 in the direction of the arrow Y1 with the pressing surface 21b of the first frame 21 and the pressing surface 22b of the second frame 22 in contact with each other. The first mold 61 and the second mold 62 are released from the first frame 21 and the second frame 22 and are extracted. Thereby, the frameless mold 6 formed by combining the first mold 61 and the second mold 62 is formed. As shown in FIG. 8, the mold 6 is received by the second pressure surface 32 a of the second pressure body 32. In addition, as shown in FIG. 9, the casting_mold | template 6 formed with the 1st casting_mold | template 61 and the 2nd casting_mold | template 62 has the casting cavity 64 into which a molten metal is poured. The mold 6 is released from the first frame 21 and the second frame 22 on its outer wall surface and is frameless. Since the first mold 61 and the second mold 62 are frameless, it is required to increase the strength of the outer wall surfaces 61p and 62p.

  As described above, according to the present embodiment, during molding, the first movable portion 41 is in the pressurizing direction (arrow Y1) along with the pressurization of the casting sand by the first pressurizing body 31 in a state of being in contact with the casting sand. Direction). As a result, the cast sand that is in contact with the inner wall surface 41c of the first movable portion 41 moves in the pressurizing direction due to the moving movement. That is, the casting sand close to the first pattern surface 11 of the pattern body 1 moves in the pressurizing direction (the direction of the arrow Y1) by the movement. As a result, not only the casting sand close to the first pressing surface 31a of the first pressing body 31 but also the casting sand close to the first pattern surface 11 of the pattern body 1 moves in the pressing direction, and the casting sand filling density increases. The strength of the first mold 61 is increased.

  Similarly, the 2nd movable part 42 moves to a pressurization direction (arrow Y2 direction) with the pressurization of the cast sand by the 2nd pressurizing body 32 in the state which contacted the cast sand. As a result, the cast sand that is in contact with the inner wall surface 42c of the second movable portion 42 moves due to the movement. That is, the casting sand close to the second pattern surface 12 of the pattern body 1 moves in the pressurizing direction (arrow Y2 direction) due to the movement. As a result, the casting sand close to the second pattern surface 12 of the pattern body 1 also moves in the pressing direction, the casting sand filling density increases, and the strength of the second mold 62 increases.

  In particular, the first movable portion 41 is provided on the outer wall surface 61 p side of the first mold 61, and the casting sand that is in contact with the inner wall surface 41 c of the first movable portion 41 is the first movable portion 41. Due to the frictional resistance with the inner wall surface 41c, it is easy to move together with the first movable part 41, so the casting sand filling density on the outer wall surface 61p side of the first mold 61 is increased and the outer wall surface 61p side of the first mold 61 is increased. Strength can be increased. Similarly, the second movable portion 42 is provided on the outer wall surface 62 p side of the second mold 62, and the casting sand contacting the inner wall surface 42 c of the second movable portion 42 is the second movable portion 42. Due to the frictional resistance with the inner wall surface 42c, the second movable portion 42 is likely to move together, so the casting sand filling density on the outer wall surface 62p side of the second mold 62 is increased, and the second mold 62 side surface on the outer wall surface 62p side is increased. Strength can be increased.

  As described above, the strength of the outer wall surfaces 61p and 62p of the first mold 61 and the second mold 62 can be increased, so that the projection size of the casting cavity 64 can be secured and the first mold 61 and the second mold 62 can be secured. The projection size of the outer wall surfaces 61p and 62p can be suppressed. Alternatively, the projection size of the casting cavity 64 can be increased while suppressing the increase in the projection size of the outer wall surfaces 61p and 62p of the first mold 61 and the second mold 62.

  Furthermore, since the height dimension of the first space 28 formed by the inner wall surface 21c of the first frame 21 and the pattern body 1 is increased corresponding to the first movable portion 41, the compression margin of the casting sand is increased. The strength of the first mold 61 can be increased. Similarly, since the height dimension of the second space 29 formed by the inner wall surface 22c of the second frame 22 and the pattern body 1 is increased corresponding to the second movable part 42, the compression allowance of the casting sand is increased. The strength of the second mold 62 can be increased.

  FIG. 10 shows a second embodiment. The second embodiment basically has the same configuration and the same function and effect as the first embodiment. Parts having common functions are denoted by common reference numerals. Hereinafter, a description will be given centering on portions different from the first embodiment. As shown in FIG. 10, the first movable portion 41 has a first inclined surface 41x, and the second movable portion 42 has a second inclined surface 42x. A return means 7 for returning the first movable part 41 and the second movable part 42 is provided. As shown in FIG. 10, the return means 7 includes a rod 70 as a support portion held by the pattern body 1, a relief member 71 that is provided so as to be movable along the rod 70 and has an insertion hole 71 w, and a relief member 71. And an urging spring 72 that functions as a return drive source that urges in the return direction (arrow B2 direction).

  The escape member 71 has a wedge shape, and engages with the first engagement surface 71 a that engages with the first inclined surface 41 x of the first movable portion 41 and the second inclined surface 42 x of the second movable portion 42. A second engagement surface 71b. Here, when the first frame 21 moves in the direction of the arrow Y1, the first movable portion 41 is pushed in the same direction and retreats to the first retreat space 15, and when the second frame 22 moves in the direction of the arrow Y2, 2 The movable portion 42 is pushed in the same direction and retreats to the second retreat space 16. At this time, due to the engagement of the first inclined surface 41x and the first engagement surface 71a and the engagement of the second inclined surface 42x and the second engagement surface 71b, the escape member 71 is connected to the first pressure member 31 and the second additional surface 71b. It escapes along the rod 70 in a direction (arrow B1 direction) intersecting the pressing direction of the pressure body 32.

  As a result, the urging spring 72 pressed against the seating surface 71r of the escape member 71 is elastically contracted and accumulates the urging force. When the first frame 21 and the second frame 22 return to their original positions and the pushing force is released, the urging force accumulated in the urging spring 72 causes the escape member 71 to return in the return direction (arrow B2 direction). Moving. As a result, the first movable portion 41 moves in the direction opposite to the arrow Y1 direction and automatically returns to the original position, and the second movable portion 42 moves in the direction opposite to the arrow Y2 direction and automatically returns to the original position. Return to.

  FIG. 11 shows a third embodiment. The third embodiment has basically the same configuration and the same function and effect as the first embodiment. Parts having common functions are denoted by common reference numerals. Hereinafter, a description will be given centering on portions different from the first embodiment. As shown in FIG. 11, the return means 7 includes a escape member 71 and a cylinder 75 that functions as a return drive source that biases the escape member 71 in the return direction (arrow B2 direction). The cylinder 75 has a main body 75a and a cylinder rod 75b, and may be a hydraulic cylinder or a pneumatic cylinder. Here, when the first frame 21 moves in the direction of the arrow Y1, the first movable portion 41 is pushed in the same direction and retreats to the first retreat space 15, and when the second frame 22 moves in the direction of the arrow Y2, 2 The movable portion 42 is pushed in the same direction and retreats to the second retreat space 16. At this time, the escape member 71 escapes in the direction of the arrow B <b> 1, which is a direction intersecting the pressurizing direction of the first pressurizing body 31 and the second pressurizing body 32. At this time, the cylinder rod 75b of the cylinder 75 has already retracted in the direction of the arrow B1, or retracts while being pressed by the escape member 71. When the first frame 21 and the second frame 22 are returned to their original positions and the pushing force is released, the control device operates the cylinder rod 75b of the cylinder 75 in the direction of arrow B2 (return). As a result, the first movable portion 41 moves in the direction opposite to the arrow Y1 direction and automatically returns to the original position, and the second movable portion 42 moves in the direction opposite to the arrow Y2 direction and returns to the original position. Return automatically.

  FIG. 12 shows a fourth embodiment. The fourth embodiment has basically the same configuration and the same function and effect as the first embodiment. Parts having common functions are denoted by common reference numerals. Hereinafter, a description will be given centering on portions different from the first embodiment. As shown in FIG. 12, the mold making apparatus according to the present embodiment is a mold making apparatus for making a horizontally divided unframed mold, and a pattern body 1 having a first pattern surface 11 and a second pattern surface 12, A first frame 21 (upper frame) disposed on the first pattern surface 11 side of the pattern body 1, a second frame 22 (lower frame) disposed on the second pattern surface 12 side of the pattern body 1, and a first A first pressurizing surface 31a having a first pressurizing surface 31a for pressing the casting sand loaded in the first space 28 formed by the inner wall surface 21c of the frame 21 and the first pattern surface 11 of the pattern body 1 toward the pattern body 1. A second pressure is applied to pressurize the casting sand loaded in the second space 29 formed by the pressure body 31, the inner wall surface 22 c of the second frame 22 and the second pattern surface 12 of the pattern body 1 toward the pattern body 1. A second pressure member 32 having a pressure surface 32a.

  FIG. 12 shows a state where the first movable part 41 is retracted in the first retreat space 15 and the second movable part 42 is retracted in the second retreat space 16. According to the present embodiment, as shown in FIG. 12, the first pressure member 35 provided on the first pressure member 31 side is independent of the first pressure member 31, and the arrow Y1 It can be displaced relative to the first pressure body 31 in the direction. The first pressurizing unit 35 is provided so as to be movable in the directions of the arrows Y1 and Y2 by a first pressurizing drive source 47 provided in the vicinity of the first pressurizing body 31. Thus, since the first pressure drive source 47 is independent of the first pressure cylinder 37, the movement of the first movable portion 41 in the pressure direction can be controlled independently of the first pressure body 31, The advantage that the strength of the first mold 61 on the outer wall surface 61p side can be controlled independently of the pressurization of the first pressurizing body 31 is obtained.

  Further, the second pressure member 36 provided on the second pressure body 32 side is independent of the second pressure body 32 and is relative to the second pressure body 32 in the arrow Y2 direction. Displaceable. The second pressurizing unit 36 is pressurized in the arrow Y2 direction by a second pressurizing drive source 48 provided in the vicinity of the second pressurizing body 32. Thus, since the second pressure drive source 48 is independent of the second pressure cylinder 38, the movement of the second movable portion 42 in the pressure direction can be controlled independently of the second pressure body 32, There is an advantage that the strength of the second mold 62 on the outer wall surface 62p side can be controlled independently of the pressurization of the second pressurizing body 32. The first pressure drive source 47 and the second pressure drive source 48 can be formed by a hydraulic cylinder or a pneumatic cylinder, but a motor mechanism may be used in some cases.

  FIG. 13 shows a fifth embodiment. The fifth embodiment has basically the same configuration and the same function and effect as the first embodiment. Parts having common functions are denoted by common reference numerals. Hereinafter, a description will be given centering on portions different from the first embodiment. According to the present embodiment, the first frame 21 and the first movable part 41 are integrated, and the second frame 22 and the second movable part 42 are integrated. FIG. 13 is a conceptual diagram showing a state before the first movable portion 41 integral with the first frame 21 is retracted into the first retreat space 15 and the second movable portion 42 integral with the second frame 22. Shows a state after retreating to the second retreat space 16.

  However, in practice, the first movable portion 41 and the second movable portion 42 are synchronized, and when the first movable portion 41 is exposed from the first retreat space 15, the second movable portion 42 is the second movable portion 42. 2 Exposed from the retreat space 16. When the first movable part 41 is retracted in the first retreat space 15, the second movable part 42 is retracted in the second retreat space 16. The first frame 21 has a stopper surface 21m that regulates the retracting amount of the first movable portion 41, and the second frame 2 has a stopper surface 22m that regulates the retracting amount of the second movable portion 42.

  14 to 17 show a sixth embodiment. The sixth embodiment has basically the same configuration and the same function and effect as the first embodiment. Parts having common functions are denoted by common reference numerals. Hereinafter, a description will be given centering on portions different from the first embodiment. According to the present embodiment, as shown in FIG. 14, in the first form, the first movable portion 41 and the first retractable movable portion 81 are disposed adjacent to each other between the first frame 21 and the pattern body 1. ing. The first movable portion 41 is located on the first frame 21 side, and the first retractable movable portion 81 is provided on the pattern body 1 side. In the first embodiment, the second movable portion 42 and the second retractable movable portion 82 are disposed adjacent to each other between the second frame 22 and the pattern body 1. The second movable portion 42 is located on the second frame 22 side, and the second retractable movable portion 82 is provided on the pattern body 1 side. In addition, the 1st movable part 41, the 2nd movable part 42, the 1st retraction movable part 81, and the 2nd retraction movable part 82 can be formed using a hydraulic or pneumatic cylinder.

  A case where a frameless mold is formed will be described. First, as shown in FIG. 14, the first movable part 41 and the first retractable movable part 81 are adjacent to each other in the pressurizing direction, and the second movable part 42 and the second retractable movable part 82 are mutually connected in the pressurizing direction. Adjacent to each other is the first form. Cast sand is loaded into the first space 28 formed by the inner wall surface 41 c of the first frame 21 and the first pattern surface 11 of the pattern body 1, and the inner wall surface 22 c of the second frame 22 and the first space of the pattern body 1. Cast sand is loaded into the second space 29 formed by the two pattern surfaces 12. With the cast sand loaded in the first space 28 and the second space 29 in this way, the first pressurizing body 31 moves in the pressurizing direction (arrow Y1 direction) toward the pattern body 1 and the second The pressurizing body 32 moves toward the pattern body 1 in the pressurizing direction (arrow Y2 direction). As a result, the casting sand in the first space 28 is preliminarily compressed, and the casting sand in the second space 29 is preliminarily compressed.

  Next, as shown in FIG. 15, it switches to a 2nd form. That is, the first retreat movable part 81 retreats in the direction (arrow X1 direction) intersecting the pressurizing direction to form the first retreat space 15 between the first movable part 41 and the pattern body 1 and the second The retreat movable part 82 retreats in a direction (arrow X2 direction) intersecting the pressurizing direction, and the second retreat space 16 is formed between the second movable part 42 and the pattern body 1.

  Next, as shown in FIG. 16, the first frame 21 is pressed together with the first movable portion 41 in the pressurizing direction (arrow Y1 direction), and the first movable portion 41 moves in the same direction to move to the first retraction space. Retreat to 15. In this way, the first mold 61 is formed. Similarly, the second frame 22 body is pressurized in the pressurizing direction (in the direction of arrow Y2) together with the second movable portion 42, and the second movable portion 42 moves in the same direction and retracts in the second retreat space 16. In this way, the second mold 62 is formed. Thereafter, the pattern body 1 is withdrawn, and as shown in FIG. 16, the first movable portion 41 is retracted in the direction of the arrow X1 'and the second movable portion 42 is retracted in the direction of the arrow X2'. After that, the first mold 61 of the first frame 21 and the second mold 62 of the second frame 22 are aligned, and the first mold 61 and the second mold 62 are released from the first frame 21 and the second frame 22, so A frame-type mold 6 is obtained.

(Other examples)
According to the above-described embodiment, the present invention is applied when the horizontally divided mold 6 is formed. However, the present invention is not limited thereto, and may be applied when a vertically divided mold is formed. According to the above-described embodiment, the present invention is applied when the frameless mold 6 is formed. However, in some cases, the frameless mold 6 is applied to further increase the strength of the framed mold. It may be increased. In addition, the present invention is not limited to the embodiments described above and shown in the drawings, and can be implemented with appropriate modifications within a range not departing from the gist.

It is sectional drawing which shows the mold making apparatus in an initial position. It is sectional drawing which shows the state before a 1st movable part evacuates to the 1st evacuation space. . It is sectional drawing which shows the state which the 1st movable part evacuated to the 1st evacuation space. It is sectional drawing of the mold making apparatus which shows the state which loaded sand into 1st space and 2nd space. It is sectional drawing of the mold making apparatus which shows the state which pressurized the sand with which 1st space and 2nd space were loaded. It is sectional drawing of the mold making apparatus which shows the state which released the pattern body from the 1st casting_mold | template and the 2nd casting_mold | template. It is sectional drawing of the mold making apparatus which shows the state which made the pattern body released from the 1st casting_mold | template and a 2nd casting_mold | template retreat. It is sectional drawing of the mold making apparatus which shows the state which mounted the casting_mold | template which consists of a 1st casting_mold | template and a 2nd casting_mold | template on the 2nd pressurization body. It is sectional drawing which shows the casting_mold | template which consists of a 1st casting_mold | template and a 2nd casting_mold | template. FIG. 10 is a configuration diagram in the vicinity of a return unit according to the second embodiment. FIG. 10 is a configuration diagram in the vicinity of return means according to the third embodiment. It is sectional drawing of the mold making apparatus which concerns on Example 4 and shows the state which pressurizes the sand with which 1st space and 2nd space were loaded, and molds the 1st casting_mold | template and the 2nd casting_mold | template. FIG. 10 is a cross-sectional view of a mold making apparatus showing a process of molding a first mold and a second mold by pressurizing sand loaded in a first space and a second space according to the fifth embodiment. It is sectional drawing of the mold making apparatus which concerns on Example 6 and shows the state which is prepressurizing the sand with which the 1st space partitioned off by the pattern body and the 2nd space were pressurized. Sectional drawing of the mold making apparatus which concerns on Example 6 and shows the state which made the 1st evacuation movable part and the 2nd evacuation movable part retreat in the direction which cross | intersects a pressurization direction, and formed the 1st evacuation space and the 2nd evacuation space. It is. FIG. 10 is a cross-sectional view of the mold making apparatus according to the sixth embodiment, showing a state where the first movable part is retracted into the first retreat space and the second movable part is retracted into the second retreat space. FIG. 10 is a cross-sectional view of a mold making apparatus according to a sixth embodiment, showing a state immediately before the first mold of the first frame and the second mold of the second frame are combined.

Explanation of symbols

  In the figure, 1 is a pattern body, 11 is a first pattern surface, 12 is a second pattern surface, 15 is a first retraction space, 16 is a second retraction space, 21 is a first frame, 22 is a second frame, and 28 is 1st space, 29 is 2nd space, 31 is 1st pressurization body, 32 is 2nd pressurization body, 41 is the 1st movable part, 42 is the 2nd movable part, 6 is a mold, 61 is the 1st mold, 62 is a second mold, 7 is a return means, 71 is a relief member, 72 is a biasing spring (return drive source), 75 is a cylinder (return drive source), 81 is a first retractable movable portion, and 82 is a second retractable movable. Indicates the part.

Claims (7)

A pattern body having a pattern surface to form a mold surface by transfer; and
A frame arranged on the pattern surface side of the pattern body;
In a mold making apparatus comprising a pressing body that presses casting sand loaded in a space formed by an inner wall surface of the frame and the pattern surface of the pattern body toward the pattern body,
Between the frame and the pattern body, it is provided on the pattern body side and is in contact with the casting sand on the pattern body side in the space, and is movable in the pressurizing direction with the pressurization by the pressurizing body. A mold making apparatus having a movable part. A pattern body having a first pattern surface provided on one surface and forming a first mold surface by transfer and a second pattern surface provided on the other surface and forming a second mold surface by transfer;
A first frame disposed on the first pattern surface side of the pattern body; a second frame disposed on the second pattern surface side of the pattern body;
A first pressurizing body that presses casting sand loaded in a first space formed by an inner wall surface of the first frame and the first pattern surface of the pattern body toward the pattern body;
A mold comprising a second pressurizing body that presses casting sand loaded in a second space formed by an inner wall surface of the second frame and the second pattern surface of the pattern body toward the pattern body. In molding equipment,
Between the at least one of the first frame and the second frame and the pattern body, it is provided on the pattern body side and is in contact with the casting sand on the pattern body side of the space, and is cast by the one. A mold making apparatus having a movable part movable in a pressurizing direction in accordance with pressurization of sand.   3. The pattern body according to claim 1 or 2, wherein the pattern body includes a pattern plate and a pattern holding portion that holds the pattern plate, and the pattern holding portion is added along with pressurization by the pressure body. A mold making apparatus characterized by having a retreat space for retreating the movable part moving in the pressure direction. In a space formed by a pattern body having a pattern surface forming a mold surface by transfer, a frame disposed on the pattern surface side of the pattern body, an inner wall surface of the frame and the pattern surface of the pattern body In a mold making apparatus comprising a pressurizing body that pressurizes the loaded casting sand toward the pattern body,
Between the frame and the pattern body, it is provided on the pattern body side and is in contact with the casting sand on the pattern body side in the space, and is movable in the pressurizing direction with the pressurization by the pressurizing body. Retractable switchable between a movable part and a first form that exists between the frame and the pattern body together with the movable part and a second form that forms a retreat space for retracting the movable part moving in the pressurizing direction. A mold making apparatus comprising a movable part.   5. The retraction direction of the movable part according to claim 1, wherein the retraction direction of the movable part is a direction along a pressurizing direction by the pressurizing body or a direction crossing the pressurizing direction by the pressurizing body. A mold making apparatus characterized by the above.   In any one of Claims 1-5, when the pressurization by the said pressurization body is cancelled | released, the return means which returns the said movable part to an original position is provided, It is characterized by the above-mentioned. Mold making equipment.   7. The return means according to claim 6, wherein when the movable part is retracted, the return part escapes in a direction intersecting a direction in which the movable part retracts, and when the force for retracting the movable part is released, the movable part And a return drive source for moving the escape member in a direction for returning the mold.

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