JP2011045921A - Method for molding die and device therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for molding a die where casting sand can be uniformly filled into a flask, repair cost by the wear in the surface of a model and the inside surface of the flask is reduced, the deformation and breakage of a match plate are prevented, and a handicraft can be obviated. <P>SOLUTION: In this method, the upper and lower flasks are superimposed on both the sides of a match plate 21 so as to be a superimposed flask 20, casting sand 18 is filled into the upper flask 23 of the superimposed flask, a sand hold down member 54 is progressed toward the superimposed flask, the sand hold down member is inserted into the inner circumference of the upper flask and is abutted against the filled casting sand, further, the upper flask supporting member 50 energized to the front part by the repulsive force of an elastic member 52 is progressed toward the superimposed flask, so as to be abutted against the upper flask, in a state where the sand press down member is abutted against the casting sand and the upper flask supporting member is abutted against the upper flask, the superimposed flask is reversed, the casting sand is filled into the lower flask 19 in the reversed superimposed flask, the squeeze member 68 is inserted into the inner circumference of the lower flask, so as to squeeze the casting sand filled into the lower flask and the upper flask. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

The present invention relates to a method for forming a mold by molding a model divided into an upper mold and a lower mold by a parting surface of a match plate, and an apparatus in which the method is used.

2. Description of the Related Art Conventionally, there is known a mold making apparatus using a match plate in which a model divided into an upper mold and a lower mold by a parting surface is provided on an upper surface and a lower surface. According to Patent Document 1 in which such a mold making apparatus is described, a match plate (pattern plate) is sandwiched between upper and lower casting frames having a cylindrical frame shape, and each of the openings from the upper and lower casting frames. A squeeze plate is fitted on the match plate side to squeeze the foundry sand filled in the upper and lower casting frames. Further, the squeeze plate is divided into at least a central portion and an outer peripheral portion, and the central portion and the outer peripheral portion can be moved forward and moved independently to the match plate side, and each of the squeeze plate extending to the central portion and the outer peripheral portion can be provided. Driving means capable of setting the forward driving force independently of each other is provided. Thus, an effective squeeze pressure can be applied to both the central portion and the outer peripheral portion of the mold in accordance with the shape, size, and state of foundry sand provided on the match plate.

Similarly, according to Patent Document 2 in which a molding machine for molding a mold while aligning upper and lower casting frames is described, when molding, first, the upper and lower casting frames sandwiched between the match plates are reversed by a reversing device. By doing so, the lower casting frame is positioned at the upper position. Subsequently, the positioned lower casting frame is filled with casting sand, and the compression plate (squeeze member) and the auxiliary compression frame (auxiliary squeeze member) are inserted into the lower casting frame by the sub-compression cylinder. Pre-compact (pre-squeeze) the foundry sand. Next, the upper casting frame is positioned at the upper position by turning the polymerization casting frame upside down, and casting sand is filled in the upper casting frame. In addition, it is described that a compression plate is inserted into the upper casting frame from above, and a lower compression plate (lower squeeze member) is inserted into the lower casting frame from below to perform main squeeze.

Japanese Patent No. 3447227 JP 59-87952 A

However, in the mold making apparatus of Patent Document 1, when the molding sand is supplied to the molding space, the ejection direction of the molding sand ejected from the blow nozzle port does not face the match plate at right angles.
For a model having a complicated shape, the filling of foundry sand is non-uniform, resulting in non-uniform mold strength and poor mold product accuracy. In addition, since the casting sand is filled by blow by a blower, the sand particles violently collide with the model surface, the inner surface of the casting frame, and the sealing material, and the surfaces are worn quickly and the sand particles are scattered. Therefore, there has been a problem that the repair cost of the equipment is increased and the working environment is deteriorated.

In the mold making apparatus of Patent Document 2, a mold without a frame is formed. In order to facilitate removal of the mold from the casting frame in the final demolding process, the casting frame is formed in a tapered shape. For this reason, after the lower casting frame is filled with foundry sand, the foundry sand is pre-compressed with a sub-compression cylinder so that the lower mold does not fall out of the lower casting frame in the 180 ° reversal of the next process. However, if the pre-compression pressure is too high, the pre-compression is pressurization on one side of the match plate, which may cause deformation or breakage of the match plate.

The present invention has been made in view of such conventional problems. The purpose of the present invention is to be able to evenly fill the casting frame with casting sand even if a complex shaped model is used, and to wear the surface of the model or the inner surface of the casting frame. The present invention is to provide a mold making method and apparatus that can reduce the repair cost due to the above and prevent deformation and breakage of the match plate.

The structural feature of the invention according to claim 1 is that the upper and lower casting frames are superposed on both sides of the match plate to form a polymeric casting frame, the upper casting frame of the polymeric casting frame is filled with foundry sand, and the sand pressing member is Advancing toward the polymerization casting frame, the sand pressing member was fitted into the inner periphery of the upper casting frame and brought into contact with the filled casting sand, and urged forward by the repellent force of the elastic member. The upper casting frame support member is moved forward toward the superposed casting frame and brought into contact with the upper casting frame, the sand pressing member is brought into contact with the foundry sand, and the upper casting frame support member is brought into contact with the upper casting frame. In the state of contact, the superposed casting frame is inverted, the lower casting frame of the inverted superposed casting frame is filled with casting sand, and a squeeze member is fitted into the inner periphery of the lower casting frame, and the lower casting frame and It is to squeeze the foundry sand filled in the upper casting frame.

The structural features of the invention according to claim 2 are characterized in that a casting frame superposition apparatus that superimposes upper and lower casting frames on both sides of a match plate and is formed on a base plate to form a polymerization casting frame, and the upper casting frame of the polymerization casting frame The casting sand filling device for filling the inner periphery of the lower casting frame of the inverted casting frame with the casting sand by natural dropping, and the polymerization casting frame carried in by the carry-in / out device are supported by the lower casting frame. And a reversing member that is reversed by a rotation device, and is mounted on the reversing member so as to be able to advance and retreat by an advancing and retreating device, and is fitted into the inner periphery of the upper casting frame of the superposed casting frame carried into the reversing member. A sand holding member that comes into contact with the cast sand, an upper casting frame support member that is movably mounted on the reversing member and is urged forward by the repellent force of an elastic member to come into contact with the upper casting frame; It is mounted on a table so that it can be lifted by a lifting device, and the sand pressing member is In contact with the foundry sand filled in the upper casting frame, the reversing member is reversed with the upper casting frame supporting member in contact with the upper casting frame, and the inner circumference of the lower casting frame of the superposed casting frame A squeeze member that is inserted into the inner periphery of the lower casting frame and squeezes the casting sand filled in the lower casting frame and the upper casting frame after the casting sand is filled by the casting sand filling device. That is.

A structural feature of the invention according to claim 3 is that, in claim 2, the sand pressing member is fixed to a pressing member that is mounted on the reversing member so as to be advanced and retracted by an advancing / retreating device, and the upper cast frame support member Is mounted on the presser member so as to be relatively movable, and is urged forward by a repelling force of an elastic member, and comes into contact with the upper cast frame when the sand presser member is fitted into the inner periphery of the upper cast frame. That is.

A structural feature of the invention according to claim 4 is that, in claim 3, a restriction member for restricting the lowering of the pressing member due to the lowering of the squeeze member to a predetermined distance is provided on the base.

According to the first aspect of the present invention, the casting sand is filled into the upper casting frame of the superposed casting frame from above, and the sand pressing member is brought into contact with the filled casting sand and attached to the front by the repellent force of the elastic member. The upper cast frame is supported by the energized upper cast frame support member. In this state, the polymerization casting frame is turned upside down, and casting sand is filled into the lower casting frame of the inverted polymerization casting frame from above. Then, the squeeze member is inserted into the lower casting frame and squeezed. At this time, the casting sand in the lower casting frame is compressed by the pressure of the squeeze, and the polymerization casting frame moves downward by friction between the casting sand and the inner surface of the lower casting frame. As a result, the superposed casting frame moves downward against the repelling force of the elastic member, and the sand holding member that is in contact with the foundry sand of the upper casting frame fits into the upper casting frame and casts in the upper casting frame. Squeeze the sand. In this way, the casting sand in the lower casting frame and the casting sand in the upper casting frame are squeezed simultaneously, so that the pressure applied to only one surface of the match plate is not biased, and deformation and breakage of the match plate are prevented. Can be prevented.

According to the invention according to claim 2, the casting sand is filled into the upper casting frame by natural fall, and the sand pressing member is fitted into the inner periphery of the upper casting frame of the polymerization casting frame supported by the reversing member. The upper casting frame support member biased forward by the repellent force of the elastic member is brought into contact with the upper casting frame. In this state, the reversing member is turned upside down to invert the superposed casting frame, and the lower casting frame is filled with casting sand by natural fall, and then the squeeze member is fitted into the inner periphery of the lower casting frame by the lifting device. Squeeze the foundry sand filled in the lower casting frame. At this time, the molding sand in the lower casting frame is compressed by the pressure of the squeeze, and the polymerization casting frame moves downward due to friction between the casting sand and the inner surface of the lower casting frame. As a result, the superposed casting frame moves downward against the repelling force of the elastic member, and the sand pressing member abutted against the foundry sand of the upper casting frame is fitted into the upper casting frame and cast in the upper casting frame. Squeeze the sand. In this way, because the foundry sand in the lower casting frame and the foundry sand in the upper casting frame are simultaneously squeezed,
It is possible to provide a mold making apparatus capable of preventing deformation and breakage of the match plate without uneven pressure applied to only one surface of the match plate.

According to the invention of claim 3, since the sand presser member and the upper casting frame support member are both fixed to the presser member, the presser member advances by the advance / retreat device, so that the inside of the upper press frame of the sand presser member is The fitting into the periphery and the contact with the upper casting frame supporting member on the upper casting frame can be simultaneously performed with a simple configuration.

According to the fourth aspect of the present invention, when the molding sand is squeezed by the descending of the squeeze member, the descending of the presser member is restricted, so that the reaction force against the pressing force of the squeeze member is generated in the presser member, and this reaction force Thus, the sand pressing member fixed to the pressing member can be further fitted into the upper casting frame to squeeze the foundry sand reliably.

1 is a schematic view showing an embodiment of a mold making apparatus of the present invention. The figure which shows an inversion member and a rotation apparatus. The figure which shows an upper cast-frame support apparatus. The figure which shows a match plate. The figure which shows the filling process to the upper casting frame of foundry sand. The figure which shows the process of setting the filled upper casting frame to the inversion apparatus. The figure which shows the process of turning upside down the lower casting frame and the upper casting frame. The figure which shows the process of filling casting sand in a lower casting frame. The figure which shows the process of moving a squeeze head to a molding station. The figure which shows the process of lowering a squeeze head. The figure which shows the process of simultaneously squeezing the foundry sand in an upper casting frame and a lower casting frame with a squeeze head. The figure which shows the process of raising a squeeze head. The figure which shows the process of turning upside down the upper casting frame and the lower casting frame. The figure which shows the process of isolate | separating an upper casting frame, a match plate, and a lower casting frame. The figure which shows the process of moving an upper casting frame and a lower casting frame to a frame alignment and frame extraction station. The figure which shows the process just before removing the upper mold and the lower mold from the upper and lower casting frames together. The figure which the upper mold and lower mold which were removed from the upper and lower casting frames were put together, and the mold was completed.

An embodiment of a molding method using a mold molding apparatus according to the present invention will be described below with reference to the drawings.

As shown in FIG. 1, the mold making apparatus 2 includes a base frame 4, a rectangular square frame top frame 6, and a machine frame 10 that is provided at an end of the base 4 and supports a column 8 that supports the top frame 6. And machine frame 10
The molding station 12 and the frame setting / die-cutting station 14 which are supported in sequence and arranged in order.
, And a frame alignment / frame removal station 16. The horizontal direction in which these stations 12, 14, 16 are arranged is defined as the X direction. As shown in FIG. 2, the polymer casting frame 20 filled with the foundry sand 18 to form the mold 121 (see FIG. 13 or FIG. 17) is a bottom casting of a substantially rectangular tube shape that is tapered downward. A frame 19, a match plate 21 to which the divided models 17 are respectively attached on the upper surface and the lower surface, and a substantially rectangular tube-shaped upper casting frame 23 that is tapered downward are formed by being overlapped. . A molding space for molding the upper mold 121a (see FIG. 13) is formed by the inner surface of the upper casting frame 23, one surface of the match plate 21, and the surface of the model 17 attached to the one surface. The lower mold 12 is formed by the inner surface, the other surface of the match plate 21 and the surface of the model 17 attached to the other surface.
A molding space for molding 1b (see FIG. 13) is formed.

As shown in FIG. 4, the match plate 21 has a rectangular support frame 2 with a hole formed in the center.
5 and a model holding plate 29 locked to a locking edge 27 formed along the hole of the support frame 25. The divided models 17 are attached and fixed to both surfaces of the model holding plate 29, respectively.
The model holding plate 29 is fixed to the locking edge 27 of the support frame 25 by a locking claw not shown.

As shown in FIG. 1, the molding station 12 is alternately arranged above the superposition casting frame 20 by reversing devices (reversing members) 22 that horizontally invert the superposition casting frame 20 into which the foundry sand 18 is put. A squeeze device 24 and a foundry sand charging device 26 as a foundry sand filling device, and a casting frame lateral movement device 28 as a carry-in / out device for laterally moving the polymerization casting frame 20 are provided.

As shown in FIG. 2, the reversing device 22 is rotatable to a bearing member 30 fixed as a set to each of the lower ends of the hanging members 31 suspended from the both ends of the top frame 6 at a predetermined interval. A pair of pivot shafts 32 to be supported, a pair of vertical wall portions 34 that are integrally supported by the pivot shafts 32 and have arc edges at the bottom along the pivot locus, and horizontally below the vertical wall portions 34. A plurality of roller members 36 arranged in parallel with each other and a support plate 38 provided between the vertical wall portions 34 at the upper part of the paired vertical wall portions 34 are provided. An external gear (not shown) is provided around the rotation shaft 32, and a rack (not shown) is engaged with the external gear to constitute a pinion rack mechanism. The rack is driven by an air cylinder device (not shown). These rotating shaft 32, external gear, rack, and air cylinder device constitute a rotating device. An air cylinder 40 as an advancing / retreating device is provided at the center of the support plate 38, and a pressing plate 42 as a pressing member is provided at the tip of the air cylinder 40. The presser plate 42 moves in the direction of the opposing roller member 36 (downward in FIG. 2) as the air cylinder 40 advances. Four guide rods 44 projecting toward the support plate 38 are provided on the upper surface of the presser plate 42. Each guide rod 44 is guided by a guide hole (not shown) drilled in the support plate 38 to move the presser plate 42 closer to and away from the support plate 38 in parallel. The air cylinder 40 communicates with an unillustrated air pump, and its operation is controlled by opening and closing an unillustrated electromagnetic valve provided between the air pump and the air cylinder 40. In the four corners of the presser plate 42, FIG.
And as shown in FIG. 3, the upper cast-frame support member 50 is attached. Upper casting frame support member 50
Is a bottomed tubular member 46 having an opening on one side, and a tubular member 4 fitted into the tubular member 46.
6 and a rod member 48 that advances and retracts from the opening. A guide hole 49 is provided in the presser plate 42, and a cylindrical member 46 is fixed to the periphery of the guide hole 49 at the opening. A flange portion 51 is provided around the proximal end portion of the rod member 48, and the forward end of the rod member 48 is restricted by the flange portion 51 coming into contact with the peripheral edge of the guide hole 49. Tubular member 46
3 accommodates a metal spring (elastic member) 52 (see FIG. 3) whose one end is in contact with the bottom surface of the cylindrical member 46, and the other end of the metal spring 52 is in contact with a flange portion 51 provided on the rod member 48. As a result, the rod member 48 is biased in the forward direction (downward in FIG. 3). The rod member 48 is slidably guided by the guide hole 49, and the tip tapered portion 47 provided in the rod member 48 engages with a tapered hole (not shown) formed in the end edge portion of the upper casting frame 23, When the rod member 48 comes into contact with the edge of the upper casting frame 23, the horizontal positioning of the upper casting frame 23 is performed. A sand retainer plate 54 as a sand retainer member is provided at the center of the lower surface of the retainer plate 42, and the sand retainer plate 54 is formed in a rectangular cross section that can be fitted into the inner periphery of the upper casting frame 23.

As shown in FIG. 1, a restriction column 53 protrudes from the base 4 below the reversing device 22, and the guide rod of the presser plate 42 when the squeeze device 24 squeezes the upper end of the restriction column 53. Four restricting members 55 are provided so as to be opposed to 44 through a gap. This gap prevents the reversing device 22 from hitting the restricting member 55 when reversing.

As shown in FIG. 2, the squeeze device 24 includes wheels 58 that move on a transport rail 56 extending in the X direction on the top surface of the top frame 6 at the lower four corners, and a support frame 60 formed in a three-dimensional rectangular shape. have. A squeeze cylinder 62 as an elevating device is fixed to the upper center of the support frame 60 with a bolt or the like (not shown) via a mounting bracket 64. The squeeze cylinder 62 is provided with a piston portion 66 projecting downward, and a squeeze plate (squeeze member) 68 fitted into the inner periphery of the lower casting frame 19 is provided at the lower end portion of the piston portion 66 with a holding plate 69 (see FIG. 2). Is provided. On both sides of the squeeze cylinder 62, a pair of cylindrical guides 7 are fixed to the support frame 60 by mounting brackets 64 and extend in the vertical direction.
0 is provided, and an elevating guide rod 72 protruding from the upper surface of the holding plate 69 is slidably fitted in each cylindrical guide 70. The squeeze cylinder 62 communicates with an unillustrated air pump, and its operation is controlled by opening and closing an unillustrated electromagnetic valve provided between the air pump and the squeeze cylinder 62.

As shown in FIG. 1, the casting sand charging device 26 is a casting sand 1 necessary for mold making that is molded at a time.
8 is housed as a unit, and a hopper 74 is provided in contact with the upper surface of any one of the upper and lower casting frames 23 and 19 to put the foundry sand 18 into the molding space. The hopper 74 has a shooter portion 76 that comes into contact with the upper surfaces of the upper and lower casting frames 23, 19. A plurality of gate plates 80 that divide the inside of the outer peripheral wall 78 up and down are supported on the outer peripheral wall 78 above the shooter portion 76. ing. Above the gate plate 80 is a sand measuring portion 82 for storing the foundry sand 18. The foundry sand 18 is conveyed and stored in the sand weighing unit 82 by a conveyor device (not shown). The gate plate 80 is rotated around a horizontal axis line by a rotation device (not shown), and when the gate plate 80 is positioned at the horizontal position, the inner center of the outer peripheral wall 78 is partitioned vertically so that the foundry sand 18 can be stored. When the gate plate 80 is rotated and positioned in the vertical position, the stored foundry sand 18 falls and is put into the molding space.
The hopper 74 is fixed to a horizontal frame 84 extending from the support frame 60, and the horizontal frame 84 is provided with wheels (not shown) that roll on the transport rail 56. Hopper 7
4 and the squeeze device 24 are moved between the molding station 12 and the frame setting / die cutting station 14 by driving a shuttle cylinder 86 provided at the end of the top frame 6 (right end in FIG. 1). Positioned. Shuttle cylinder 86 communicates with an unillustrated air pump, and its operation is controlled by opening and closing an unillustrated electromagnetic valve provided between the air pump and shuttle cylinder 86.

As shown in FIG. 1, the casting frame lateral movement device 28 includes a pair of guide frames 88 extending in the X direction, and when the roller member 36 of the reversing device 22 is positioned below the guide frame 88. An alignment roller portion 90 that can be aligned is provided. A clamp carriage 92 that clamps and unclamps the superposed casting frame 20 is provided on the alignment roller portion 90 so as to be horizontally movable. The clamp carriage 92 is provided in the horizontal cylinder device 9 provided at one end of the guide frame 88.
4 is driven. The horizontal cylinder device 94 communicates with an air pump (not shown), and the operation is controlled by opening and closing an electromagnetic valve (not shown) provided between the air pump and the horizontal cylinder device 94. The clamp carriage 92 is provided with a clamp claw portion 96 whose base end portion is supported, and the tip end portion of the clamp claw portion 96 can be locked to a locked portion (not shown) of the superposed cast frame (lower cast frame 19). It has become. The clamp carriage 92 is provided so as to be movable on the alignment roller portion 90 and the roller member 36, and the clamp carriage 92 is provided between the molding station 12 and the frame setting / die cutting station 14 with the superposed casting frame 20 locked by the clamp claws 96. Move.

As shown in FIG. 1, the frame setting / die cutting station 14 has an elevating roller table 98 that is guided by the base 4 so as to be moved up and down. The elevating roller table 98 has an elevating support cylinder 100 that is slidably supported in the guide hole of the base 4, and the elevating support cylinder 100 is communicated with an air pump (not shown), and between the air pump and the elevating support cylinder 100. The operation is controlled by opening and closing an unillustrated electromagnetic valve provided in the. A pair of horizontal frames 102 extending in the X direction are provided at the upper end of the lifting support cylinder 100. A plurality of pairs of roller pieces 104 are rotatably supported on the horizontal frame 102 inside. Further, the elevating roller base 98 is provided at the rising end so as to be aligned with the alignment roller portion 90. Lifting roller stand 98
Is provided so that one end of the lower turntable 106 is positioned as a frame setting / die-cutting position.

The lower turntable 106 and the upper turntable 114 positioned above the lower turntable 106 are a lower end portion and an upper end portion of a rotating peripheral wall 113 that is externally fitted to a rotating support shaft 116 that is provided in parallel with the lifting roller table 98. Each is fixed integrally to the part. The rotation peripheral wall 113 and the rotation support shaft 116 are provided so as to be relatively rotatable relative to each other. The upper rotary table 114 and the lower rotary table 106 are respectively provided with support arms 115 extending in the horizontal direction on both sides of the rotary support shaft 116. The support arms 115 on both sides are provided with support walls 117 facing each other at a predetermined interval, and engagement protrusions (not shown) are provided on the inner sides of the support walls 117 to face each other. The opposing support walls 117 are provided so that the upper casting frame 23 or the lower casting frame 19 can be disposed therebetween, and the engagement protrusions (not shown) provided in the upper casting frame 23 and the lower casting frame 19 respectively on the opposing engaging projections. By engaging the joint portion, the upper casting frame 23 or the lower casting frame 19 is detachably held between the support walls 117. Note that the opposing support wall 117 is configured such that a lifting roller table 98 and a mold table 120 described later can pass therethrough. The rotating peripheral wall 113 is supported by a rotating support shaft 116 via a bearing (not shown), and is rotated with respect to the rotating support shaft 116 by a reduction device and a motor (not shown) so that the rotating peripheral wall 113 is rotated. As a result, the lower turntable 106 and the upper turntable 114 rotate in synchronization. And the lower casting frame 19 engaged with each supporting arm 115
Alternatively, the upper casting frame 23 is aligned with the frame setting / die cutting station 14 and the frame aligning / frame cutting station 1.
6 to rotate.

A pair of orthogonal support frames 108 extending in the Y direction (horizontal direction orthogonal to the X direction) is provided between the lower turntable 106 and the upper turntable 114, and a plurality of conveyances are provided inside the orthogonal support frame 108. A roller 110 is rotatably supported. Transport roller 1
10 carries the match plate 112 in and out. One end of the above-described upper turntable 114 is positioned above the orthogonal support frame 108 as a frame setting / die cutting position. In addition,
By raising the lifting roller table 98 on which the lower casting frame 19 is placed, the match plate 21 placed on the transport roller 110 and the upper casting frame 23 positioned at the frame setting position of the upper turntable 114 are overlapped. Together, the polymer casting frame 20 is formed. The elevating roller table 98, the conveying roller 110, the lower turntable 106, the upper turntable 114, and the like constitute a casting frame superposing apparatus.

As shown in FIG. 1, the frame aligning / frame removing station 16 has a mold aligning device 118 on the lower side. The mold aligner 118 has a lifting shaft cylinder 119, and the lifting shaft cylinder 11.
The piston portion 9 is guided so as to be movable up and down with respect to the base 4. The lift shaft cylinder 119 is communicated with an air pump (not shown), and its operation is controlled by opening and closing an electromagnetic valve (not shown) provided between the air pump and the lift shaft cylinder 119. A mold table 120 on which the mold 121 is placed is provided at the upper end of the lift shaft cylinder 119. Above the mold table 120, the other end of the lower turntable 106 and the other end of the upper turntable 114 are positioned as frame alignment / frame removal positions. A mold removal head 122 driven by an air cylinder (not shown) is guided above the upper turntable 114 so as to be movable up and down with respect to the top frame 6. A punching plate 124 is provided at the lower end portion of the mold punching head 122, and the punching plate 124 is formed so as to be fitted into the inner periphery of the upper casting frame 23.

The operation of the mold making apparatus configured as described above will be described below with reference to the drawings. First, in the frame setting / die cutting station 14, as shown in FIG. 1, the lower casting frame 19 is engaged with the lower turntable 106 in order from the bottom, and is arranged at the frame setting position. 21 is arranged, and the upper cast table 23 is placed on the upper turntable 114.
Are engaged and arranged at the frame set position. These lower casting frames 19 and match plates 21
And the upper casting frame 23 opposes each other so that fitting is possible. An elevating roller base 98 is disposed immediately below the lower casting frame 19, and a foundry sand throwing device 26 (hopper 74) is disposed above the upper casting frame 23. The sand measuring unit 82 of the foundry sand throwing device 26 stores the foundry sand 18 thrown into the upper casting frame 23. On the other hand, the piston portion of the horizontal cylinder device 94 is advanced, and the clamp carriage 92 is positioned on the roller member 36 of the reversing device 22.

Next, the lifting support cylinder 100 is driven to raise the lifting roller base 98 as shown in FIG. When the lower end of the lower casting frame 19 comes into contact with the roller piece 104, the lower casting frame 19 is disengaged from the lower turntable 106, and the lower casting frame 19 is placed on the lifting roller table 98 and moves up. When the lower casting frame 19 passes between the orthogonal support frames 108, the match plate 21 is received from the conveying roller 110, and the matching plate 21 is superimposed on the lower casting frame 19. Further, the lifting roller table 98 is raised, and the match plate 2 is raised at the rising end of the lifting roller table 98.
1 is in contact with the lower end of the upper casting frame 23, the upper casting frame 23 and the upper turntable 114.
And the upper casting frame 23 is overlaid on the match plate 21. In this way, the lower casting frame 19, the match plate 21, and the upper casting frame 23 are overlapped to form a polymerization casting frame 20 (see FIG. 2). Then, the gate plate 80 of the foundry sand throwing device 26 is rotated and positioned in the vertical position, and the foundry sand 18 stored in the sand measuring unit 82 is naturally dropped to the inner surface of the upper casting frame 23 and the match plate 21. The molding space formed by the upper surface and the surface of the model 17 is filled. At this time, the roller piece 104 is aligned with the aligned roller member 36 and the alignment roller unit 90. And the front-end | tip is latched by the to-be-latched part of the lower casting frame 19 (polymerization casting frame 20) by rotating the clamp nail | claw part 96 of the clamp trolley 92. FIG.

Next, as shown in FIG. 6, the lower casting frame 19 (polymerized casting frame 20) is moved from the raising / lowering roller table 98 in the frame setting / die cutting station 14 by driving to retract the piston portion of the horizontal cylinder device 94. 12 is moved onto the roller member 36 of the reversing device 22. And the latching to the to-be-latched part of the lower casting frame 19 (polymerized casting frame 20) is cancelled | released by rotating the clamp nail | claw part 96 in a cancellation | release direction. Then, by driving the air cylinder 40 in the forward direction, the sand retainer plate 54 is fitted into the inner peripheral portion of the upper casting frame 23 (polymerization casting frame 20) and contacts the upper surface of the casting sand 18 filled therein. Make contact. At this time, the rod member 48 of the upper casting frame support member 50.
Is brought into contact with the upper end of the upper casting frame 23. At this time, the tip tapered portion 47 of the rod member 48 is fitted into the tapered hole of the upper casting frame 23. The air cylinder 40 includes a sand presser plate 54.
However, a light pressure that does not deviate from the inner periphery of the upper casting frame 23 is applied and maintained. Since the upper end portion of the upper casting frame 23 abuts on the upper casting frame support member 50 and the lower casting frame 19 is placed on the roller member 36, the superposed casting frame 20 (the upper casting frame 23, the match plate 21, and the lower casting frame 21). The frame 19) is sandwiched from above and below by the pressure of the air cylinder 40 at the molding position. In parallel, the gate plate 80 of the hopper 74 is rotated and positioned at the horizontal position, and the sand metering portion 82 has the lower casting frame 19.
The amount of foundry sand 18 charged into the molding space formed by is transported and stored by a conveyor device (not shown).

Next, as shown in FIG. 7, the upside down of the superposed casting frame 20 is reversed by turning the reversing device 22 upside down around the rotation shaft 32 (see FIG. 1). The molding space formed by the lower casting frame 19 is positioned at the upper portion, and the lower end portion (upper end portion in FIG. 7) of the lower casting frame 19 is opened. Further, the lower end portions of the four guide rods 44 are in a state of facing the regulating member 55 through the gaps.

Next, as shown in FIG. 8, the piston portion of the shuttle cylinder 86 is driven in the forward direction, and the hopper 74 is moved from the frame setting / die cutting station 14 to the molding station 12. The lower end opening of the hopper 74 is opposed to the opening of the lower casting frame 19. Then, by rotating the gate plate 80 and positioning the gate plate 80 in the vertical position, the foundry sand 18 is naturally dropped from the sand measuring portion 82 and put into the molding space formed by the lower casting frame 19.

Next, as shown in FIG. 9, the shuttle cylinder 86 is driven in the backward direction, the squeeze device 24 is moved to the molding station 12, and the squeeze plate 68 is opposed to the foundry sand 18 filled in the lower casting frame 19. . In the meantime, the gate plate 80 of the hopper 74 is rotated and positioned at the horizontal position.

Next, as shown in FIG. 10, the squeeze cylinder 62 is driven in the forward direction, and the squeeze plate 68 is fitted into the inner periphery of the lower casting frame 19.

Next, as shown in FIG. 11, the foundry sand 18 in the lower casting frame 19 is squeezed by further lowering the squeeze plate 68 in contact with the foundry sand 18 in the lower casting frame 19. At this time, the foundry sand 18 in the lower casting frame 19 is compressed by the pressure of the squeeze and the foundry sand 18 is compressed.
And the inner surface of the lower casting frame 19 cause a force to move the polymerization casting frame 20 downward. Due to this downward force, the superposed casting frame 20 moves downward against the repelling force of the metal spring 52, and the reversing device 2
The second presser plate 42 is moved downward by a force that moves downward via the upper casting frame support member 50, and the guide rod 44 protruding from the presser plate 42 abuts against the regulating member 55. Then, the guide rod 44 receives a reaction force by the restriction member 55 that moves downward and contacts, and the reaction force is transmitted to the presser plate 42 via the guide rod 44. Since the sand retainer plate 54 is fixed to the retainer plate 42, the sand retainer plate 54 abutted against the foundry sand 13 of the upper cast frame 23 is moved into the upper cast frame 23 by the downward movement of the superposed cast frame 20. Furthermore, it inserts and squeezes the foundry sand 18 in the upper casting frame 23. Thus, by squeezing the foundry sand 18 inside the lower casting frame 19 with the squeeze plate 68, the foundry sand 18 inside the upper casting frame 23 can be squeezed simultaneously. Thus, by simultaneously squeezing, the pressure applied to only one surface of the match plate 21 is not biased, and deformation / breakage of the match plate 21 can be prevented.

Next, as shown in FIG. 12, the squeeze plate 68 is raised by driving the squeeze cylinder 62 in the backward direction, and the squeeze plate 68 is separated from the inner periphery of the lower casting frame 19. At this time, the superposed cast frame 20 is sandwiched from above and below by the roller member 36 and the upper cast frame support member 50.

Next, as shown in FIG. 13, by rotating the reversing device 22 by 180 degrees, the polymer casting frame 20
Are turned upside down to position the upper casting frame 23 upward and the lower casting frame 19 downward. And the front-end | tip is latched by the to-be-latched part of the lower casting frame 19 by rotating the clamp nail | claw part 96 of the clamp trolley 92. FIG. At the same time, the alignment roller unit 90, the roller member 32 of the reversing device 22, and the roller piece 104 of the lifting roller base 98 are aligned.

Next, the horizontal carriage 94 is driven in the forward direction to move the clamp carriage 92 to the roller member 3.
2, the superposed casting frame 20 is moved to the die cutting position of the frame setting / die cutting station 14. At that time, the upper casting frame 23 is caused to enter between the opposing support walls 117. Then, by lowering the raising / lowering roller table 98 from the rising end, the engaged portion of the upper casting frame 23 is engaged with the engaging protrusion of the support wall 117 of the upper turntable 114, and the upper casting frame is attached to the upper turntable 114. 23 is fixed. And as shown in FIG. 14, the match plate 21 and the lower casting frame 19
Is further lowered to allow the match plate 21 to be received by the conveying roller 110 of the orthogonal support frame 108. Then, the elevating roller base 98 on which only the lower casting frame 19 is placed is further lowered, and the engaged portion of the lower casting frame 19 is engaged with the engaging portion of the lower turntable 106. The match plate 21 placed on the transport roller 110 is continuously placed at the frame setting position and repeatedly used until the planned production number of the molds 121 is completed. Then, when the production of the expected number of molds 121 is completed, the mold 121 is unloaded to a storage box (not shown), and the match plate 21 on which a new model 17 is set is loaded to the frame setting position of the conveyance roller 110. .

Next, as shown in FIG. 15, the lower turntable 106 and the upper turntable 114
Is rotated 180 degrees in the horizontal direction, and the upper casting frame 23 and the lower casting frame 19 are moved to the frame alignment / frame extraction station 16 and positioned at the frame extraction positions.

Next, the mold table 120 is driven by driving the elevating shaft cylinder 119 in the forward direction.
And lower casting frame 19 is received from lower turntable 106. Mold table 120
Is fitted into the inner periphery of the lower casting frame 19 and comes into contact with the lower surface of the mold 121b. Further, by raising the mold table 120 on which the lower casting frame 19 is placed, the lower casting frame 19 is superposed on the upper casting frame 23 placed on the upper turntable 114 as shown in FIG. And mold removal head 1
22 is inserted into the inner periphery of the upper casting frame 23, the upper mold 121a and the lower mold 1
Perform template matching to match 21b.

Next, the mold table 120 is lowered, and the upper mold 121a is extracted from the upper casting frame 23 engaged with the upper turntable 114 to remove the frame. By further lowering the mold table 120 on which the upper mold 121a, the lower mold frame 19 and the lower mold 121b are placed, the lower mold 121b is extracted from the lower mold frame 19 at the position of the lower turntable 106, and the frame is removed. FIG.
As shown in FIG. 3, a mold 121 in which upper and lower molds 121a and 121b are stacked is completed. Then, the completed mold 121 is carried out to a storage warehouse by a conveyor (not shown).

13 and 14, the upper casting frame 23 and the lower casting frame 19 from which the mold 121 is extracted.
As shown in FIG. 1, the upper and lower turntables 106 and 114 are moved to the frame setting / die cutting station 14 by rotating 180 degrees, and are superposed on the match plate 21 placed on the conveying roller 110 to be superposed. A frame 20 is formed. Thereafter, the same molding process is repeated.

According to the mold making apparatus 2 configured as described above, the casting sand 18 is filled into the upper casting frame 23 of the polymerization casting frame 20 from above, and the sand pressing plate 54 is brought into contact with the filled casting sand 18. The upper cast frame 23 is supported by the upper cast frame support member 50 urged forward by the repellent force of the metal spring 52. In this state, the polymerization casting frame 20 is turned upside down, and the casting sand 18 is filled into the lower casting frame 19 of the inverted polymerization casting frame 20 from above. Then, the squeeze plate 68 is inserted into the lower casting frame 19 and squeezed. At this time, the molding sand 18 in the lower casting frame 19 is compressed by the pressure of the squeeze, and the polymerization casting frame 20 moves downward by friction between the casting sand 18 and the inner surface of the lower casting frame 19. As a result, the superposed casting frame 20 moves downward against the repulsive force of the metal spring 52, and the sand retainer plate 54 abutted against the foundry sand 18 of the upper casting frame 23 is further fitted into the upper casting frame 23. Then, the foundry sand 18 in the upper casting frame 23 is squeezed. Thus, the foundry sand 1 in the lower casting frame 19
8 and the casting sand 18 in the upper casting frame 23 are squeezed simultaneously, so that the pressure applied to only one surface of the match plate 21 is not biased, and deformation and breakage of the match plate 21 can be prevented.

Further, since the foundry sand 18 is filled into the upper cast frame 23 and the lower cast frame 19 in a state of facing the match plate 21 from the upper side, the foundry sand 18 is used even when the model 17 having a complicated shape is used.
Is uniformly filled. Therefore, the accuracy of a product made from the mold 121 is improved without causing a partial variation in the strength of the mold 121 to be molded. Further, the filling of the foundry sand 18 is due to natural fall, and the sand particles are not impacted unlike the case of filling with the conventional blow device, so the surface of the match plate 21 and the inner surfaces of the casting frames 19 and 23 are worn. There are few things.
Therefore, it is possible to extend the life of the equipment and reduce the repair cost.

Further, since the sand presser plate 54 and the upper casting frame support member 50 are both fixed to the presser plate 42, when the presser plate 42 advances by the air cylinder 40, the sand presser plate 5.
The fitting of the upper casting frame 4 into the inner periphery of the upper casting frame 23 and the contact with the upper casting frame 23 of the upper casting frame support member 50 can be simultaneously performed with such a simple configuration.

Further, when the foundry sand 18 is squeezed by the lowering of the squeeze plate 68, the lowering of the presser plate 42 is restricted. Therefore, a reaction force against the pressing force by the squeeze plate 68 is applied to the sand presser plate 54 fixed to the presser plate. Cause it to occur. By this reaction force, the sand pressing plate 54 can be further fitted into the upper casting frame 23 and the foundry sand 18 can be squeezed reliably.

In the above embodiment, the presser plate 42 to which the sand presser plate 54 is assembled.
In addition, although the upper cast frame support member 50 is fixed, the present invention is not limited to this. For example, a member other than the press plate 42 to which the sand press plate 54 is assembled (however, the support plate 38 is used).
The upper cast frame support member may be fixed to (fixed).

In addition, the main drive of the mold making device is based on air pressure using an air cylinder.
It is not limited to this, For example, well-known conventional techniques, such as a thing by a hydraulic pressure, a thing by a servomotor using a ball screw, and a thing by a linear motor, can be used.

A model divided into an upper mold and a lower mold by a parting surface can be used for a mold making apparatus using a match plate attached to an upper surface and a lower surface.

2 ... Mold making apparatus, 4 bases, 19 ... Lower casting frame, 20 ... Polymerization casting frame, 21 ... Match plate,
22 ... reversing member (reversing device), 23 ... upper casting frame, 26 ... casting sand filling device (casting sand feeding device)
28 ... Carry-in / out device (cast frame lateral movement device), 32 ... Rotating device (rotating shaft), 40 ... Advancing / retracting device
(Air cylinder), 42 ... presser member (presser plate), 50 ... upper cast frame support member, 52 ... elastic member (metal spring), 54 ... sand presser plate, 55 ... regulating member, 62 ... lifting device (squeeze cylinder), 68 ... Squeeze member (squeeze plate), 98 ... Casting frame polymerization device (lifting roller base), 110 ... Casting frame polymerization device (conveying roller), 106 ... Casting frame polymerization device (lower turntable), 114 ... Casting frame polymerization device (Upper turntable).

Claims (4)

The upper and lower casting frames are superposed on both sides of the match plate to form a polymer casting frame,
Filling the upper casting frame of the polymer casting frame with casting sand,
The sand pressing member is moved forward toward the superposition casting frame, and the sand pressing member is fitted into the inner periphery of the upper casting frame to come into contact with the filled casting sand. The upper casting frame support member urged by is advanced toward the superposed casting frame and brought into contact with the upper casting frame,
The sand pressing member is in contact with the foundry sand, and the upper casting frame support member is in contact with the upper casting frame, and the polymerization casting frame is reversed,
Filling the lower casting frame of the inverted polymer casting frame with foundry sand,
A mold making method, wherein a squeeze member is fitted into an inner periphery of the lower casting frame to squeeze the foundry sand filled in the lower casting frame and the upper casting frame. A casting frame polymerization apparatus which is provided on a base and superposes upper and lower casting frames on both sides of a match plate to form a polymerization casting frame;
A foundry sand filling device that fills the inner periphery of the upper cast frame of the polymer cast frame and the lower cast frame of the inverted polymer cast frame with natural sand by natural fall, and
A reversing member that is supported by the lower casting frame and that is reversed by a rotating device while being supported by the lower casting frame;
A sand holding member that is mounted on the reversing member so as to be able to advance and retreat by an advancing and retreating device, is fitted into an inner periphery of an upper casting frame of the superposed casting frame carried into the reversing member, and abuts against the filled foundry sand;
An upper casting frame support member that is movably mounted on the reversing member and is urged forward by the repelling force of an elastic member to come into contact with the upper casting frame;
In the state where it is mounted on the base so that it can be raised and lowered by a lifting device, the sand pressing member is in contact with the foundry sand filled in the upper casting frame, and the upper casting frame support member is in contact with the upper casting frame The reversing member is reversed, and the casting sand is filled in the inner periphery of the lower casting frame of the superposed casting frame by the casting sand filling device, and then inserted into the inner periphery of the lower casting frame, and the lower casting frame and A squeeze member for squeezing the foundry sand filled in the upper casting frame;
A mold making apparatus characterized by comprising: In Claim 2, the sand pressing member is fixed to a pressing member that is mounted on the reversing member so as to be advanced and retracted by an advancing and retracting device,
The upper cast frame support member is mounted on the presser member so as to be relatively movable, and is urged forward by a repellent force of an elastic member, and when the sand presser member is fitted to the inner periphery of the upper cast frame, A mold making apparatus that abuts on an upper casting frame. 4. The mold making apparatus according to claim 3, wherein a restriction member for restricting the lowering of the pressing member due to the lowering of the squeeze member to a predetermined distance is provided on the base.

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