JP4112220B2 - Centrifugal casting equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a centrifugal casting facility for casting a ductile cast iron pipe or the like.
[0002]
[Prior art]
The centrifugal casting equipment for producing a cast iron pipe such as a ductile cast iron pipe has a mold 2 which is installed substantially horizontally and rotates around its axis, and a rotating mold 2 as shown in a schematic diagram of FIG. The casting cart 1 to be held, the electric motor 8 mounted on the casting cart 1 as a driving device for rotating the mold, the cart driving device 16 for moving the casting cart 1 on the rail 11, and the molten metal 17 are accommodated for casting. A triangular ladle 12 used as a ladle, and a chute 13 and a trough 14 used as pouring pots for relaying and supplying molten metal 17 poured from the triangular ladle 12 into the mold 2 are provided. While the molten metal 17 is poured from the tip of the trough 14 inserted into the mold 2 rotating by the electric motor 8, the mold 2 is opposite to the triangular ladle 12 by the cart driving device 16 together with the casting cart 1. By moving to the side , Injected sequentially solidify the molten metal 17, is directly manufactured cast iron pipe 18 from the molten metal 17. In the figure, reference numeral 5 is a pair of rotation support devices installed to fix the rotating mold 2 to the casting cart 1, and 6 is a pair provided for supplying and discharging cooling water for cooling the mold 2. A water cooling jacket, 9 is a belt for transmitting the power of the electric motor 8, 10 is a wheel, and 15 is a core. The core 15 forms the end face shape of the cast iron pipe 18 to be manufactured, and prevents the molten metal 17 supplied from the trough 14 from leaking.
[0003]
By the way, when producing cast iron pipes 18 of different sizes, it is necessary to replace the mold 2. However, in the conventional centrifugal casting equipment, the motor 8 and the like are disposed above the casting carriage 1. The mold 2 cannot be pulled out above the casting carriage 1 and needs to be removed in the axial direction of the mold 2, so that it is necessary to replace the mold such as centering the mold and connecting cooling water. Needed a lot of time and effort.
[0004]
As a means for solving this problem, Japanese Patent Laid-Open No. 10-156506 has been proposed, but the centrifugal casting equipment in the same publication does not use a water-cooled mold, and therefore a water-cooled mold is used. In the existing centrifugal casting equipment, no effective means for enabling rapid die change has been proposed yet.
[0005]
[Problems to be solved by the invention]
The present invention has been made in view of the above circumstances, and an object thereof is to make it very easy to replace a mold without requiring a centering operation of the mold in a centrifugal casting facility having a water-cooled mold. And it is providing the centrifugal casting installation which can be performed in a short time.
[0006]
A centrifugal casting facility according to a first aspect of the present invention includes a cylindrical mold body and a sleeve provided on the outer periphery of the mold body, a mold that rotates around the axis of the mold body, and the mold is rotated. A pair of rotation support devices that can be supported, a water cooling jacket that is attached to a mold for supplying and draining cooling water to the mold, a mold drive device that rotates the mold, the mold and the mold drive A centrifugal casting equipment having a casting carriage on which the apparatus is mounted, wherein the rotary support device and a water cooling jacket adjacent to the rotary support device are integrally connected and fixed by a connecting means, and the casting The carriage has a receiving base that receives the rotation support device so that the axial center height of the mold body is at a predetermined position, and a guide plate that guides the rotation support device so that the left and right positions of the mold body are at the predetermined position. And the mold is suspended from above Just place the casting carriage and centering of the upper, lower, left and right mold body is completed, the rotary support device one is fixed to the casting carriage in the axial direction of the die body, the other one, the mold body The mold driving device is slidably installed with the casting cart in the axial direction, and one of the mold driving devices is a fulcrum shaft fixed to the upper portion of the casting cart, and the other is a detachable holder with respect to the casting cart. It is mounted on a seat and can be turned around the fulcrum shaft as a rotation axis by a seat drive device installed on a casting cart .
[0007]
A centrifugal casting facility according to a second invention includes a cylindrical mold body having a water cooling structure, a mold that rotates around the axis of the mold body, and a mold drive device for rotating the mold. And a casting cart equipped with the mold and the mold driving device, wherein the mold driving device has one of the fulcrum shafts fixed to the upper portion of the casting cart, and the other One of them is mounted on a receiving seat that can be attached to and detached from the casting carriage, and can be turned around the fulcrum shaft as a rotation axis by a receiving seat drive device installed on the casting carriage .
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the accompanying drawings. FIGS. 1-6 is a figure which shows an example of embodiment of this invention, Comprising: FIG. 1 is a perspective view which shows schematic structure of the assembled mold for centrifugal casting, FIG. Sectional drawing which showed the installed metal mold | die from the direction orthogonal to the axial center of a metal mold | die, FIG. 3 is sectional drawing by XX 'arrow of FIG. 2, FIG. 4 is YY of FIG. FIG. 5 is a detailed view of a part A in FIG. 3, and FIG. 6 is a schematic view showing a mold driving device installed on the casting cart from a direction parallel to the axis of the mold. .
[0011]
As shown in FIG. 1, the mold 2 is rotatably supported by a pair of rotation support devices 5, 5, and cooling water that flows through the mold 2 and cools the mold 2 at the pipe end of the mold 2. A pair of water cooling jackets 6, 6 provided for supplying and discharging water is installed, and the adjacent rotation support device 5 and the water cooling jacket 6 are integrally connected by a connection fitting 7 provided as a connection means.・ It is fixed. A pulley 43 is installed between the pair of rotation support devices 5 and 5. The water cooling jackets 6 and 6 are provided with a cooling water supply port and a drain port (not shown).
[0012]
As shown in FIG. 2, the mold 2 includes a cylindrical mold body 3 and a sleeve 4 provided on the outer periphery of the mold body 3, and a gap between the mold body 3 and the sleeve 4 is provided with cooling water. The cooling water supplied from one water cooling jacket 6 cools the mold body 3 through this gap and is discharged from the other water cooling jacket 6. The mold body 3 is a part for producing a cast iron pipe by receiving a molten metal from an injection rod such as a trough and solidifying it.
[0013]
The rotation support device 5 has a structure in which the mold 2 is rotatably supported by a bearing 23. Specifically, a bearing 23 is arranged between a bearing outer ring 22 fixed to the bearing case 19 and a bearing inner ring 24 fixed to the sleeve 4, and the bearing outer ring 22 is formed on both sides by bearing case lids 20 and 20. The bearing inner ring 24 is fixed to the sleeve 4 by a bearing nut 21. That is, the bearing 23 is arranged at a position fixed with respect to the axial direction of the mold 2.
[0014]
The water cooling jacket 6 includes a water box 25 for supplying and discharging cooling water. The water box 25 is in close contact with the mold 2 through a water sealing material 26, and the mold 2 is placed in the water box 25 without leaking the cooling water. Can be rotated. Reference numerals 27 and 28 in FIG. 2 are fixing hardwares for setting the mold body 3 and the sleeve 4 at predetermined positions in the water box 25. As described above, the rotation support device 5 and the water cooling jacket 6 are connected and fixed by the connecting metal fitting 7.
[0015]
As shown in FIG. 3, the cast cart 1 is provided with guide plates 33 and 33 on both inner sides of the frame 29 of the cast cart 1 corresponding to the portion where the rotation support device 5 is disposed. A cradle 30 and a cradle 31 are installed inside the bottom. The guide plate 33 guides the rotation support device 5 to be mounted at a predetermined position of the casting cart 1, and the cradle 30 and the pedestal 31 support the rotation support device 5 at a predetermined height and a predetermined left and right. For supporting the position. That is, the mold body 3 can be centered vertically and horizontally by simply hanging the mold 2 to which the rotation support device 5 is attached from above and placing it on a predetermined position of the casting cart 1. The rotation support device 5 is pressed so as not to move upward by a presser fitting 35 and a bolt 36 attached to the frame 29. As described above, vibration of the rotation support device 5 during the rotation of the mold is prevented and suppressed by the cradles 30 and 31, the guide plates 33 and 33, the presser fitting 35 and the bolts 36.
[0016]
As shown in FIG. 4, guide plates 34 and 34 for guiding the water cooling jacket 6 are similarly installed on the inner side of the frame 29 in the casting cart 1 corresponding to the portion where the water cooling jacket 6 is disposed. A cradle 32 is installed inside the bottom of the frame 29. Further, the water cooling jacket 6 is pressed so as not to move upward by a press fitting 35 and a bolt 36 attached to the frame 29. In this way, the cradle 32, the guide plates 34, 34, the presser fitting 35, and the bolts 36 prevent and suppress vibration of the water-cooling jacket 6 when the mold rotates.
[0017]
In this case, it is necessary to adjust the horizontal position and the height position of the cradle 32 according to the cradle 30 and the cradle 31 described above in order to center the mold 2. However, the water cooling jacket 6 is only in contact with the mold 2 via the water sealing material 26, and the water cooling jacket 6 cannot support the mass of the mold 2. The water cooling jacket 6 is supported. The casting cart 1 can be moved on the rail 11 by wheels 10 by a cart driving device (not shown) such as a hydraulic cylinder.
[0018]
Although the mold 2 is water-cooled, the temperature may rise due to the heat of the molten metal. In this case, the mold 2 expands and contracts in the axial direction as the temperature rises and falls. Therefore, it is necessary to make the mold 2 extendable and contractable with respect to the casting cart 1. Therefore, in the centrifugal casting equipment of the present invention, the pressing force of the mold 2 by the pressing metal 35 and the bolt 36 is adjusted. That is, one of the rotation support devices 5 is pressed so that the gap d between the bearing case 19 and the holding metal fitting 35 shown in FIG. The position of the presser fitting 35 is adjusted to be 1 to 0.3 mm. In this case, the position of the press fitting 35 is adjusted so that the water cooling jacket 6 connected and fixed to the slidable rotation support device 5 also has a gap d of 0.1 to 0.3 mm. As a result, the mold 2 can slide with respect to the casting cart 1 and can freely expand and contract as the temperature rises and falls.
[0019]
As shown in FIG. 6, an electric motor 8 is mounted on the casting cart 1 as a mold driving device for rotating the mold 2. One of the motors 8 is a fulcrum shaft 41 fixed to the frame 29 of the casting carriage 1 and the other is a receiving seat 37 that can be attached to and detached from the receiving support base 42 of the casting carriage 1 by a holding bracket 38. Is connected to a pulley 43 installed on the mold 2 via a belt 9, and the mold 2 is rotated by the operation of the electric motor 8. The seat support 42 has a screw jack structure, and can be moved up and down by a drive device (not shown) such as a hydraulic motor or an electric motor.
[0020]
The frame 29 is provided with a hydraulic cylinder 39 as a receiving drive device for turning the receiving seat 37. The cylinder rod 40 of the hydraulic cylinder 39 expands and contracts, so that the receiving rod connected to the cylinder rod 40 is provided. The seat 37 has a structure capable of turning around a fulcrum shaft 41 as a rotation axis. FIG. 6 shows a state of turning by a one-dot chain line. That is, by removing the belt 9 and turning the receiving seat 37 as shown by the one-dot chain line in the figure, there is no obstacle when the mold 2 is installed above the casting carriage 1, and the mold 2 is moved from above. It can be hung and installed on the casting cart 1. In addition to the electric motor 8, the upper part of the casting carriage 1 is not provided with any obstacles when the mold 2 is suspended from the upper side and installed on the casting carriage 1.
[0021]
Here, attachment and detachment of the belt 9 are performed as follows. That is, the elevating seat support 42 is lowered and the hydraulic cylinder 39 is operated so that the cylinder rod 40 extends, and the seat 37 is turned to the mold 2 side with the fulcrum shaft 41 as an axis. The belt 9 is attached and detached by reducing the distance from the pulley 43. At the time of attachment, the belt 9 is fitted in the attachment groove (not shown) of the electric motor 8 and the pulley 43, and then the receiving seat 37 is swung to the opposite side of the mold 2 by the operation of the hydraulic cylinder 39. 9 is brought into close contact with the electric motor 8 and the pulley 43.
[0022]
In this case, by setting the pulling force of the hydraulic cylinder 39 to a constant value, it is possible to attach the belt 9 with a constant tension regardless of the change in the circumference of the belt 9. Further, by adjusting the position of the receiving support 42 so as to maintain this state, the belt 9 can be attached with a constant tension applied to the belt 9 even when the operation of the hydraulic cylinder 39 is stopped. it can.
[0023]
According to the centrifugal casting equipment having such a configuration, when it is necessary to replace the mold 2 with the size change of the cast iron pipe to be manufactured, the rotation support device 5 and the water cooling jacket 6 are connected by the connecting metal fitting 7. A fixed mold 2 as shown in FIG. 1 is prepared in advance, and the mold 2 in use is pulled out from the casting cart 1 with a lifting device such as a crane, and then used again. Since the mold body 3 is centered at the same time as the mold 2 by simply hanging it from above the casting carriage 1 and placing it on a predetermined position of the casting carriage 1, after the mold is installed. The centering operation is completely unnecessary, and the mold 2 can be replaced very easily and in a short time.
[0024]
In this case, in the mold 2 including the mold bodies 3 of different sizes, the axial center position of the mold body 3 is arranged at a fixed position with respect to the rotation support device 5 and the water cooling jacket 6. Regardless of the size of the mold 2 mounted on the casting cart 1, the axial center position of the mold body 3 is spatially constant, so the insertion height of a trough (not shown) used as an injection rod There is no need to correct the position, the position can always be kept constant, and the mold 2 can be replaced in a shorter time. As a matter of course, the outer support shell 5 and the outer shell of the water cooling jacket 6 always have a constant shape so as to match the frame 29 of the casting cart 1 regardless of the size of the mold body 3.
[0025]
The present invention is not limited to the centrifugal casting equipment described in the above embodiment. For example, even in a centrifugal casting equipment having a water-cooling jacket as one place, the water-cooling jacket and a rotation support device adjacent thereto are connected and fixed. The present invention can be applied. The point is that in a centrifugal casting facility, the water cooling jacket is fixed to the rotation support device, and a receiving base and a guide plate for supporting the rotation support device are provided on the casting cart side. Any form is acceptable.
[0026]
【The invention's effect】
According to the present invention, the mold body can be centered at the same time as the mold installation by simply hanging the mold from above the casting carriage and placing it on the casting carriage. Subsequent centering work is completely unnecessary, the mold can be replaced very easily and in a short time, and industrially beneficial effects such as improvement of the operation rate and productivity of the centrifugal casting equipment are brought about. .
[Brief description of the drawings]
FIG. 1 is a view showing an example of an embodiment of the present invention, and is a perspective view showing a schematic structure of an assembled centrifugal casting mold.
FIG. 2 is a diagram showing an example of an embodiment of the present invention, and is a cross-sectional view showing a mold installed on a casting cart from a direction perpendicular to the axis of the mold.
3 is a cross-sectional view taken along arrow XX ′ of FIG.
4 is a cross-sectional view taken along the line YY ′ of FIG.
FIG. 5 is a detailed view of part A in FIG.
FIG. 6 is a diagram showing an example of an embodiment of the present invention, and is a schematic diagram showing a mold driving device installed on a casting cart from a direction parallel to the axis of the mold.
FIG. 7 is a schematic view showing the configuration of a conventional centrifugal casting facility.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Casting cart 2 Mold 3 Mold body 4 Sleeve 5 Rotating support device 6 Water cooling jacket 7 Connecting metal fitting 8 Electric motor 9 Belt 19 Bearing case 23 Bearing 25 Water box 29 Frame 30 Receiving base 31 Receiving base 32 Receiving base 33 Guide plate 34 Guide Plate 35 Presser bracket 37 Receiving seat 38 Holding bracket 39 Hydraulic cylinder 41 Support point shaft 42 Receiving support base 43 Pulley

Claims (2)

A mold having a cylindrical mold body and a sleeve provided on the outer periphery of the mold body, a mold that rotates around the axis of the mold body, and a pair of rotation support devices that rotatably support the mold A water cooling jacket attached to the mold for supplying and draining cooling water to the mold, a mold driving device for rotating the mold, and a casting carriage on which the mold and the mold driving device are mounted. A centrifugal casting facility, wherein the rotation support device and a water-cooled jacket adjacent to the rotation support device are integrally connected and fixed by a connecting means, and the casting carriage has an axis of a mold body A cradle for receiving the rotation support device so that the height is at a predetermined position, and a guide plate for guiding the rotation support device so that the left and right positions of the mold main body are at the predetermined position are provided. Simply hang and place it on the casting cart Vertical and lateral centering is completed, the rotary support device one is fixed to the casting carriage in the axial direction of the die body, the other hand, casting carriage and slidably in the axial direction of the die body The mold drive unit is mounted on a receiving seat, one of which is a fulcrum shaft fixed to the upper part of the casting carriage and the other is removable from the casting carriage, and is installed on the casting carriage. A centrifugal casting facility characterized in that it can be swung around the fulcrum shaft as a rotation axis by a receiving drive device . A cylindrical mold body having a water cooling structure, a mold that rotates around the axis of the mold body, a mold driving device for rotating the mold, and the mold and the mold driving device. A centrifugal casting facility comprising a casting cart mounted thereon, wherein the mold driving device has one fulcrum shaft fixed to the upper portion of the casting cart and the other one detachable from the casting cart. A centrifugal casting facility, wherein the centrifugal casting equipment is mounted on a receiving seat and can be turned around the fulcrum shaft by a receiving drive device installed on a casting carriage .

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