JP4257054B2 - Centrifugal casting machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a centrifugal casting apparatus for automatically performing an operation of casting a pipe member by a centrifugal casting mold and pulling out the pipe member.
[0002]
[Prior art]
A centrifugal casting method is known in which a hollow cylindrical mold is produced by rotating a cylindrical hollow mold at a high speed around its axis and sticking the injected molten metal to the inner wall surface of the mold by centrifugal force. ing.
[0003]
As a centrifugal casting apparatus used in this type of centrifugal casting method, for example, an apparatus disclosed in JP-A-57-94461 is known. As shown in FIG. A longitudinally moving guide rail 2 is disposed on one side in the direction, and a tube pulling device (not shown) is disposed on the other side in the axial direction of the rotary mold 1.
[0004]
A longitudinally moving carriage 3 is arranged on the longitudinally moving guide rail 2, and a transverse guide rail 4 is arranged on the longitudinally moving carriage 3. When the longitudinally moving carriage 3 is disposed at a position separated from the rotary mold 1, standby guide rails 5 and 6 are connected to both ends of the transverse guide rail 4.
[0005]
A first traversing cart 7 is arranged between the standby guide rail 5 and the traversing guide rail 4 and a second traversing cart 8 is arranged between the standby guide rail 6 and the traversing guide rail 4 so as to be movable. Is done. The first traversing cart 7 is equipped with a pouring device 9, and the second traversing cart 8 is equipped with a brushing device (cleaning device) 10 and a coating material spray device 11.
[0006]
In such a configuration, after the cast pipe is pulled out from the rotary mold 1 through a pipe drawing device (not shown), the longitudinally moving carriage 3 on which the second traversing carriage 8 is mounted is located on the rotary mold 1 side. Moved. At that time, the rotary mold 1 is driven to rotate, and the brushing device 10 brushes the inner surface of the rotary mold 1.
[0007]
Next, the coating material is sprayed onto the inner surface of the rotary mold 1 from the spray device 11 while the back and forth carriage 3 moves backward in the direction away from the rotary mold 1 to perform coating. After the coating process, the second traversing cart 8 is retracted onto the standby guide rail 6 and the first traversing cart 7 is transferred onto the longitudinally moving cart 3 so that the longitudinally moving cart 3 moves forward.
[0008]
The first traversing cart 7 is provided with a pouring device 9, and the molten metal is supplied into the rotary mold 1 through the pouring device 9. And after a molten metal solidifies under the rotation effect | action of the rotary metal mold | die 1 and a cast pipe is obtained, this cast pipe will be drawn out as mentioned above.
[0009]
[Problems to be solved by the invention]
However, in the above-described prior art, the brushing device 10, the spray device 11 and the pouring device 9 are provided in parallel on one side in the axial direction of the rotating mold 1, and the brushing device 10 and the spray device 11 are A problem has been pointed out that the pouring device 9 is easily affected by heat and the positioning accuracy is lowered. In particular, when the cast pipe has a small diameter and a long shape, the brushing device 10 and the spray device 11 may interfere with the rotary mold 1.
[0010]
Furthermore, in the above-described prior art, a tube drawing device (not shown) is arranged on the other side in the axial direction of the rotary mold 1. Since this pipe drawing device is configured to be relatively long according to the axial length of the rotary mold 1, there is a problem that the installation space of the entire centrifugal casting device is enlarged and the space efficiency is poor.
[0011]
The present invention solves this type of problem, and provides a centrifugal casting apparatus that can efficiently perform a centrifugal casting operation with a simple and compact configuration that reliably avoids the influence of heat due to a pouring mechanism. With the goal.
[0012]
[Means for Solving the Problems]
Centrifugal casting equipment according to the present invention comprises a centrifugal casting mold, in turn, pouring step of pouring the centrifugal casting mold, the tubular member formed in the centrifugal casting mold from centrifugal casting mold Casting in a continuous cycle is performed with a drawing process of drawing a pipe member, a cleaning process for cleaning the inner surface side of the centrifugal casting mold, and a coating material application process for applying a coating material on the inner surface side of the centrifugal casting mold as one cycle. A centrifugal casting apparatus, a pouring mechanism for performing the pouring step, a pipe member pulling mechanism for performing the pipe member pulling step, a cleaning mechanism for performing the cleaning step, and applying the coating material A mold material application mechanism for performing the process, and a unit drive mechanism for integrally moving the tube member pulling mechanism, the cleaning mechanism, and the coating material application mechanism in a direction intersecting the axial direction of the centrifugal casting mold And The tube member pulling mechanism, the cleaning mechanism, and the coating material application mechanism are arranged in the unit drive mechanism in parallel with each other in the order of the steps of the continuous cycle in one axial direction of the centrifugal casting mold, the pouring mechanism, it is disposed in the axial direction the other of the centrifugal casting mold.
[0013]
For this reason, the tube member pulling mechanism, the cleaning mechanism, and the coating material applying mechanism are not affected by the heat from the pouring mechanism, and the positioning accuracy can be effectively maintained with a simple configuration. In addition, a relatively long tube member pulling mechanism, cleaning mechanism, and coating material application mechanism are arranged in parallel in one axial direction of the centrifugal casting mold. For this reason, the centrifugal casting apparatus is not elongated in the axial direction of the centrifugal casting mold, and the space can be effectively utilized easily.
[0014]
A pouring mechanism is provided for moving the pouring mechanism in a direction crossing the axial direction, and a discarded hot water container is disposed within the moving range of the pouring mechanism. As a result, when the molten metal in the pouring mechanism is not poured into the centrifugal casting mold, it is possible to quickly discharge the unnecessary molten metal into the container simply by moving the pouring mechanism. The entire casting operation is performed efficiently.
[0015]
Further, the centrifugal casting mold includes at least first and second centrifugal casting molds arranged in parallel with each other in the axial direction, and the interval between the first and second centrifugal casting molds is determined by a tube member drawing mechanism. The distance between the cleaning mechanism and the coating material application mechanism is set to coincide with each other. This simplifies drive control of the tube member pulling mechanism, cleaning mechanism, and coating material application mechanism, and enables efficient centrifugal casting operations to be performed using the first and second centrifugal casting molds.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a schematic plan view of a centrifugal casting apparatus 20 according to the first embodiment of the present invention.
[0017]
The centrifugal casting apparatus 20 includes a centrifugal casting mold 22, a workpiece pulling mechanism 24 (pipe member pulling mechanism) that is parallel to one another in the axial direction (arrow A direction) of the centrifugal casting mold 22 (arrow A1 direction), and cleaning. Unit drive for integrally moving the mechanism 26 and the coating material application mechanism 28, the workpiece pulling mechanism 24, the cleaning mechanism 26, and the coating material application mechanism 28 in the direction of arrow B intersecting the axial direction (direction of arrow A). A mechanism 30 and a pouring mechanism 32 disposed on the other axial direction (in the direction of arrow A2) of the centrifugal casting mold 22 are provided.
[0018]
The centrifugal casting mold 22 has a long hollow shape in the direction of arrow A, and both end edges are supported by a rotating portion 36 and a supporting portion 38 connected to a rotation driving source 34 so as to be rotatable. It is configured.
[0019]
The unit drive mechanism 30 includes a frame 40, and a unit table 42 on which the workpiece extraction mechanism 24, the cleaning mechanism 26, and the coating material application mechanism 28 are integrally disposed is disposed on the frame 40. For example, a rotary drive source 44 such as a servo motor is fixed to the frame 40, and a ball screw 46 is connected to the rotary drive source 44 so as to extend in the direction of arrow B.
[0020]
As shown in FIGS. 2 and 3, a nut portion 48 with which the ball screw 46 is engaged is provided on the bottom side of the unit table 42. A linear guide 50 is provided on the bottom surface of the unit table 42 to guide the frame 40 in the direction of arrow B in parallel with the ball screw 46.
[0021]
Three engagement holes 52 for positioning the workpiece extraction mechanism 24, the cleaning mechanism 26, and the coating material application mechanism 28 corresponding to the centrifugal casting mold 22 are provided on the bottom surface of the unit table 42 in the direction of arrow A2. The frame 40 is provided with a locking portion 54 corresponding to the centrifugal casting mold 22. The locking portion 54 includes a cylinder 56 disposed vertically upward. A rod 58 extending upward from the cylinder 56 is locked to be selectively engageable with a predetermined engagement hole 52. A pin 60 is pivotally attached.
[0022]
In the unit drive mechanism 30, instead of the above-described ball screw structure, a rack extending in the direction of arrow B is provided on the frame 40, and a pinion that meshes with the rack is pivotally attached to the unit table 42. A rotational drive source may be attached.
[0023]
As shown in FIGS. 1 and 2, the workpiece pulling mechanism 24 includes a first movable base 62 that is disposed on the unit table 42 so as to be able to advance and retreat in the direction of arrow A. The first movable base 62 is rotationally driven. The source 64 is fixed vertically downward. A pinion 66 is pivotally attached to the rotational drive source 64, and a rack member 68 that extends in the direction of arrow A and meshes with the pinion 66 is provided on the unit table 42.
[0024]
A cylindrical member 70 is supported on the first movable base 62 so as to extend in the direction of arrow A, and a drive rod 72 is disposed in the cylindrical member 70 so as to be able to advance and retract. An opening / closing chuck 74 is provided at the tip of the drive rod 72 in the arrow A2 direction, and an opening / closing cylinder 76 is connected to the tip of the drive rod 72 in the arrow A1 direction. The cylindrical member 70 has an outer shape, a dimension, and an axial length so that the cylindrical member 70 can be inserted into a cylindrical cast body 78 cast in the centrifugal casting mold 22.
[0025]
As shown in FIGS. 1 and 3, the cleaning mechanism 26 includes a second movable base 82 that can be advanced and retracted in the direction of arrow A via an actuator, for example, a rodless cylinder 80. An elevating plate 86 is provided via the elevating unit 84.
[0026]
A rotary drive source 88 is attached to the elevating plate 86 in the direction of arrow A2, and a brush 92 is connected to the drive shaft 90 of the rotary drive source 88. The brush 92 is set to be long in the direction of arrow A, and an end portion on the side of the rotational drive source 88 is rotatably supported by a support portion 96 in which a bearing 94 is housed.
[0027]
As shown in FIG. 1, the coating material application mechanism 28 includes a third movable base 102 that can be advanced and retracted in the direction of arrow A via a ball screw structure 100 connected to a motor 98, and on the third movable base 102. Is provided with a nozzle member 104 which is long in the direction of arrow A and has a small diameter. A plurality of injection ports 106 are formed on the outer periphery of the nozzle member 104 at predetermined positions and spaced apart by predetermined intervals.
[0028]
The pouring mechanism 32 includes a fourth movable base 110 that can advance and retreat in the direction of arrow B intersecting (orthogonal) with the arrow A direction. The fourth movable base 110 can be advanced and retracted in the direction of arrow B via the drive mechanism 112. It is. The drive mechanism 112 includes, for example, a motor 114 that is fixed to the fourth movable base 110, and a pinion 116 that is pivotally attached to the motor 114 meshes with a rack 118 that extends in the arrow B direction. It should be noted that a ball screw structure or the like may be employed instead of the rack and pinion structure described above.
[0029]
The fourth movable base 110 is provided with rails 120a and 120b extending in the direction of arrow A and parallel to each other, and a slide base 122 is disposed on the rails 120a and 120b so as to be able to advance and retreat. The slide base 122 is provided with a trough 124 for pouring the centrifugal casting mold 22, and the height position of the trough 124 is set corresponding to the pouring height. Within the range of movement of the fourth movable table 110 in the direction of arrow B, a discarded hot water container 126 for discharging the molten metal supplied to the trough 124 is disposed.
[0030]
The operation of the centrifugal casting apparatus 20 configured as described above will be described below along the flowchart shown in FIG.
[0031]
First, when a predetermined amount of molten metal is supplied to the pouring mechanism 32, the slide base 122 constituting the pouring mechanism 32 moves in the arrow A1 direction, and the trough 124 is arranged corresponding to the centrifugal casting mold 22. Is done. Then, after hot water is poured from the trough 124 to the centrifugal casting mold 22 (step S1), the slide base 122 is retracted in the arrow A2 direction and the rotational drive source 34 is driven. For this reason, the centrifugal casting mold 22 is rotated and held via the rotating part 36 and the support part 38 (step S2), and the molten metal is solidified in the centrifugal casting mold 22 to obtain a cylindrical cast body 78.
[0032]
Next, while the centrifugal casting mold 22 is rotated and held, a cap (not shown) is removed from the centrifugal casting mold 22 (step S3), and the workpiece extraction mechanism 24 is moved. In the workpiece pulling mechanism 24, the unit table 42 moves in the direction of the arrow B <b> 1 through the ball screw 46 and the nut portion 48 under the driving action of the rotation driving source 44 that constitutes the unit driving mechanism 30. When the workpiece pulling mechanism 24 reaches a position corresponding to the centrifugal casting mold 22, the unit table 42 is stopped.
[0033]
At that time, as shown in FIG. 2, the cylinder 56 constituting the locking portion 54 is driven, and the locking pin 60 is lifted and engaged with a predetermined engagement hole 52. Thereby, the unit table 42 is positioned and held.
[0034]
Furthermore, the drive of the rotational drive source 34 is stopped, and the first movable base 62 moves in the direction of the arrow A2 through the pinion 66 and the rack member 68 under the drive action of the rotational drive source 64. Therefore, the cylindrical member 70 provided on the first movable base 62 is inserted into the cylindrical cast body 78 cast in the centrifugal casting mold 22 and moved in the direction of the arrow A2, and the opening / closing chuck 74 is moved to the cylinder. It is arranged on the tip side of the casting 78 in the direction of arrow A2.
[0035]
Therefore, the open / close cylinder 76 is driven and the open / close chuck 74 is opened via the drive rod 72. In this state, the rotational drive source 64 is driven and the first movable base 62 moves in the direction of the arrow A1. Therefore, the open / close chuck 74 is engaged with the end of the cylindrical cast body 78, and the cylindrical cast body 78 is pulled out from the centrifugal casting mold 22 (step S4).
[0036]
After the cylindrical cast body 78 is pulled out from the centrifugal casting mold 22, the locking pin 60 is detached from the engaging hole 52, and the unit table 42 moves in the direction of arrow B2 under the driving action of the unit driving mechanism 30. Then, the cleaning mechanism 26 is disposed corresponding to the centrifugal casting mold 22.
[0037]
In the cleaning mechanism 26, as shown in FIG. 3, the second movable base 82 moves in the direction of arrow A2 under the action of the rodless cylinder 80, and the brush 92 enters the centrifugal casting mold 22 and is driven to rotate. Under the driving action of the source 88, the brush 92 is driven to rotate. Thereby, the cleaning operation of the inner surface of the centrifugal casting mold 22 is performed (step S5).
[0038]
After the cleaning operation, the brush 92 moves in the direction of the arrow A1 and is detached from the centrifugal casting mold 22, and a cap (not shown) is attached to the centrifugal casting mold 22 (step S6). Further, the centrifugal casting mold 22 is cooled (step S7), and the coating material application mechanism 28 is driven.
[0039]
As shown in FIG. 1, the coating material application mechanism 28 is configured so that the unit table 42 moves in the direction of the arrow B <b> 2, so that the motor 98 is driven to move the nozzle member after the unit table 42 is arranged corresponding to the centrifugal casting mold 22. 104 is inserted into the centrifugal casting mold 22. A plurality of injection ports 106 are provided on the outer periphery of the nozzle member 104, and a coating material (not shown) is applied from the injection ports 106 toward the inner surface side of the centrifugal casting mold 22 (step S8). .
[0040]
Then, the nozzle member 104 is detached from the centrifugal casting mold 22 and the centrifugal casting mold 22 is dried (step S9). In addition, said drying process is favorably performed by rotationally driving the centrifugal casting mold 22.
[0041]
In this case, in the first embodiment, the workpiece extraction mechanism 24, the cleaning mechanism 26, and the coating material application mechanism 28 are arranged in parallel to the arrow A1 direction side of the centrifugal casting mold 22, and the arrow A2 of the centrifugal casting mold 22 is arranged. A pouring mechanism 32 is disposed on the direction side.
[0042]
For this reason, the workpiece extraction mechanism 24, the cleaning mechanism 26, and the coating material application mechanism 28 are separated from the pouring mechanism 32 and are not affected by the heat from the pouring mechanism 32. Therefore, especially when casting a long cylindrical casting 78 having a small diameter, the workpiece pulling mechanism 24, the cleaning mechanism 26, and the coating material application mechanism 28 can be accurately positioned with respect to the centrifugal casting mold 22. With this structure, an effect that an efficient centrifugal casting method is performed can be obtained.
[0043]
Moreover, while the relatively long workpiece pulling mechanism 24, the cleaning mechanism 26, and the coating material application mechanism 28 are arranged in parallel in the same direction and incorporated in the unit table 42, the relatively short pouring mechanism 32 is independently provided. Has been placed. Thereby, the centrifugal casting apparatus 20 has an advantage that the dimension in the arrow A direction is effectively shortened, and the installation space can be effectively used easily.
[0044]
Further, in the pouring mechanism 32, the container 126 is disposed within the movement range in the arrow B direction by the drive mechanism 112. For this reason, when the molten metal in the pouring mechanism 32 is not poured into the centrifugal casting mold 22, the molten metal can be quickly and automatically transferred to the container 126 simply by moving the pouring mechanism 32 in the direction of arrow B. Can be discharged. Thereby, the efficiency of the entire centrifugal casting operation can be easily achieved.
[0045]
FIG. 5 is a schematic plan view of a centrifugal casting apparatus 130 according to the second embodiment of the present invention. In addition, the same referential mark is attached | subjected to the component same as the centrifugal casting apparatus 20 which concerns on 1st Embodiment, and the detailed description is abbreviate | omitted.
[0046]
Centrifugal casting apparatus 130 includes at least first and second centrifugal casting molds 132 and 134 that are arranged in parallel in the direction of arrow B with their axial directions (in the direction of arrow A) parallel to each other, and workpieces that are arranged in parallel in one of the axial directions. The drawing mechanism 24, the cleaning mechanism 26, and the coating material application mechanism 28; the unit driving mechanism 30 that integrally moves the workpiece extraction mechanism 24, the cleaning mechanism 26, and the coating material application mechanism 28 in the direction of arrow B; And a pouring mechanism 32 disposed on the other axial side of the casting mold 22.
[0047]
The interval P1 between the first and second centrifugal casting molds 132 and 134 is set to coincide with the respective intervals P2 of the workpiece drawing mechanism 24, the cleaning mechanism 26, and the coating material application mechanism 28.
[0048]
The centrifugal casting apparatus 130 configured as described above is driven and controlled in accordance with the operation program shown in FIG. Specifically, the first and second centrifugal casting molds 132 and 134 operate along the flowchart of FIG. 4 in the same manner as the centrifugal casting mold 22 constituting the centrifugal casting apparatus 20 according to the first embodiment. In the first centrifugal casting mold 132, the second centrifugal casting mold 134 is poured through the pouring mechanism 32 immediately before the rotation holding by the driving of the rotational drive source 34 is completed.
[0049]
Then, when the rotation holding of the first centrifugal casting mold 132 is finished, the rotation holding of the second centrifugal casting mold 134 is started substantially simultaneously. Next, predetermined operations are performed in parallel in the first and second centrifugal casting molds 132 and 134, respectively.
[0050]
As described above, in the second embodiment, one cycle operation of the second centrifugal casting mold 134 is started while one cycle operation of the first centrifugal casting mold 132 is performed. For this reason, the working efficiency of the entire centrifugal casting apparatus 130 is effectively improved, and the entire casting cycle can be easily shortened.
[0051]
Further, the interval P1 between the first and second centrifugal casting molds 132, 134 is set to coincide with the interval P2 of the workpiece pulling mechanism 24, the cleaning mechanism 26, and the coating material applying mechanism 28. Therefore, the drive control of the unit drive mechanism 30 is simplified, and the control of the centrifugal casting apparatus 130 is not complicated.
[0052]
【The invention's effect】
In the centrifugal casting apparatus according to the present invention, the pipe member drawing mechanism, the cleaning mechanism, and the coating material application mechanism are not affected by the heat of the pouring mechanism, and the positioning accuracy is effectively maintained with a simple configuration. Is possible. In addition, since the relatively long tube member pulling mechanism, cleaning mechanism, and coating material application mechanism are arranged in parallel, the entire centrifugal casting apparatus can be made compact and the space can be effectively used easily.
[Brief description of the drawings]
FIG. 1 is a schematic plan view of a centrifugal casting apparatus according to a first embodiment of the present invention.
FIG. 2 is a side view of a workpiece pulling mechanism constituting the centrifugal casting apparatus.
FIG. 3 is a side view of a cleaning device constituting the centrifugal casting apparatus.
FIG. 4 is a flowchart for explaining a centrifugal casting operation by the centrifugal casting apparatus.
FIG. 5 is a schematic plan view of a centrifugal casting apparatus according to a second embodiment of the present invention.
FIG. 6 is an operation program of the centrifugal casting apparatus.
FIG. 7 is a schematic plan view of a centrifugal casting apparatus according to the prior art.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 20, 130 ... Centrifugal casting apparatus 22, 132, 134 ... Centrifugal casting die 24 ... Work drawing mechanism 26 ... Cleaning mechanism 28 ... Coating material application mechanism 30 ... Unit drive mechanism 32 ... Pouring mechanism 42 ... Unit table 52 ... Engagement Hole 54 ... Locking parts 62, 82, 102, 110 ... Movable base 70 ... Cylindrical member 74 ... Opening / closing chuck 88 ... Rotation drive source 92 ... Brush 104 ... Nozzle member 112 ... Drive mechanism 126 ... Container

Claims (4)

A casting process comprising a centrifugal casting mold, and a pouring process for pouring the centrifugal casting mold in sequence, a pipe member pulling process for pulling out a pipe member formed by the centrifugal casting mold from the centrifugal casting mold, and the centrifugal casting mold A centrifugal casting apparatus that performs casting in a continuous cycle, with a cleaning process for cleaning the inner surface side of the mold and a coating material application process for applying a coating material on the inner surface side of the centrifugal casting mold as one cycle,
A pouring mechanism for performing the pouring step;
A tube member extraction mechanism for performing the tube member extraction step;
A cleaning mechanism for performing the cleaning step;
A coating material application mechanism for performing the coating material application process;
A unit drive mechanism for integrally moving the tube member pulling mechanism, the cleaning mechanism, and the coating material application mechanism in a direction crossing the axial direction of the centrifugal casting mold ;
Equipped with a,
The tube member pulling mechanism, the cleaning mechanism, and the coating material application mechanism are arranged in the unit drive mechanism in parallel with each other in the order of the steps of the continuous cycle in one axial direction of the centrifugal casting mold,
The pouring mechanism, a centrifugal casting apparatus according to claim Rukoto arranged axially other of the centrifugal casting mold. The centrifugal casting apparatus according to claim 1,
The unit drive mechanism is
A unit table for integrally arranging the tube member pulling mechanism for pulling out a cylindrical cast body from the centrifugal casting mold, the cleaning mechanism for cleaning the inner surface side of the centrifugal casting mold, and the coating material application mechanism;
A frame for movably supporting the unit table;
The unit table is provided with a plurality of engagement holes for positioning the tube member pulling mechanism, the cleaning mechanism, and the coating material application mechanism with respect to the centrifugal casting mold,
The centrifugal casting apparatus, wherein the frame is provided with a locking portion that can be selectively engaged with one of the engagement holes. The centrifugal casting apparatus according to claim 1, further comprising a drive mechanism that moves the pouring mechanism in a direction that intersects the axial direction.
A centrifugal casting apparatus, wherein a discarded hot water container is disposed within a moving range of the pouring mechanism. The centrifugal casting apparatus according to claim 1 or 3, wherein the centrifugal casting mold includes at least first and second centrifugal casting molds arranged in parallel with each other in the axial direction.
The distance between the first and second centrifugal casting molds is set in accordance with the distance between the tube member pulling mechanism, the cleaning mechanism, and the coating material applying mechanism.

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