JP2000176605A - Device for clamping vertical splitting shell mold - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a clamping device of a vertical splitting shell mold which can automatically and suitably clamp the thin and brittle vertical splitting shell mold. SOLUTION: The clamping device of a vertical splitting shell mold having a constitution arranging a fixed plate, movable plate 11 and working mechanism thereof in a moving truck 4 on a rail line 3, and on the other hand, arranging a rotating force transmitting means R attached/detached to the movable plate 11 and the working mechanism thereof by vertically moving and driven with an electric motor 20 attaching an inverter 20A, on the upper part of the portion between a mold setting station and a molten metal pouring station, is obtd.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vertical split shell mold clamping apparatus which clamps a vertical split shell mold from the left and right and sends it to the next station.

[0002]

2. Description of the Related Art Conventionally, when castings are cast using a sand mold without a frame, horizontal split sand molds are stacked one on top of the other in order to eliminate the mold opening of the sand mold, and a weight is placed on top of the sand mold. A mold in which a horizontal mold is placed and clamped and poured is known from Japanese Patent Application Laid-Open No. 9-239492. However, when pouring a horizontally split sand mold into a vertically split shape, it is necessary to clamp the sand mold laterally with an electric motor, a hydraulic cylinder, or two clamp plates by hand.

[0003]

When the sand mold is vertically split and clamped as described above, it is difficult to adjust the clamping pressure by an electric motor in a thin and brittle sand mold such as a shell mold, and in particular, a clamp plate is required. When the wear occurs, the set torque is weakened, and there is a problem that the torque adjustment becomes more difficult. In addition, there is a problem in that the clamping by the hydraulic motor is expensive in the hydraulic device and requires maintenance such as oil leakage. Further, manual clamping requires skill, and there are various problems such as the shell mold being damaged if excessive force is applied, and molten metal leaking if the clamping force is weak. The present invention has been made in view of the above problems, and an object of the present invention is to provide a vertical split shell mold clamping device capable of automatically and appropriately clamping a thin and brittle vertical split shell mold.

[0004]

In order to achieve the above-mentioned object, a clamp apparatus for a vertically split shell mold according to the present invention is provided at an upper part of a rail line laid from a mold setting station to a pouring station and a mold release station. A plurality of movable carts are movably arranged, and a fixed plate erected at the top of each movable cart and a tip of a screw shaft threaded through a nut body rotatably supported via a bearing. A movable plate connected to the nut body is arranged facing the same, and a gear is concentrically connected to the nut body, and at the top of a position between the mold setting station and the pouring station, the movable plate can be vertically moved by an air cylinder. A tilting frame is provided, and an electric motor provided with an inverter is provided above the tilting frame, and the tilting frame is provided below the tilting frame with respect to the gear. At the lower end, a transmission gear that can be engaged at the lower end is attached, and a rotational force transmitting unit that connects a rotation shaft of the electric motor and a rotation shaft of the transmission gear via a rotation transmission mechanism is provided. .

[0005]

Embodiments of the present invention will be described below in detail with reference to the drawings. A plurality of movable carts 4, 4 are movably arranged on a rail line 3 circulated in an endless manner from a mold setting station of the vertically split shell molds 1, 2 to a pouring station and a mold release station. I have. A mold setting table 5 is attached to the upper part of the movable carriage 4, and support brackets 6, 6 are erected at the front and rear ends of the upper part of the mold setting table 5, between the upper ends of the support brackets 6, 6. Are connected via a connecting member 7.

A fixing plate 8 is erected between the left and right intermediate portions of the mold setting table 5 and the intermediate portion of the connecting member 7, and the intermediate portions of the support brackets 6, 6 are provided with bearings. The nut bodies 9, 9 are rotatably supported. Screw shafts 10, 10 are threaded through the nut bodies 9, 9, and movable plates 11, 11 are fixed to the ends of the screw shafts 10, 10 in a state of facing the fixed plate 8. . Gears 12 are concentrically connected to the outside of the nut bodies 9.

Further, at a position between the mold setting station and the pouring station (not shown) in the rail line 3, a portal frame 13 straddling the rail line 3,
13, one end (left end in the traveling direction of the mobile trolley 4) is provided between the upper positions of the gate-shaped frames 13, 13, and the mounting brackets 14, 14 and the connecting support pins. The other end is rotatably supported via 15, 15 and the other end is connected to the tip of a piston rod of an air cylinder 18 which is mounted upward via a mounting bracket 17 to a support frame 16 which is bridged between the portal frames 13, 13. Tilting frame 19 is arranged. That is, the tilting frame 19 is tilted upward with the connection support pins 15 and 15 as fulcrums by the extension operation of the air cylinder 18, and is supported in a horizontal state (see FIG. 2) by the contraction operation.

An electric motor 20 provided with an inverter 20A is provided above the tilting frame 19 on the left side (in FIG. 2).
Are mounted back to back with respect to the traveling direction of the movable carriage 4. At the lower center of the front and rear ends of the tilting frame 19, transmission gears 22, 22 are provided so as to be vertically rotatable via mounting brackets 21, 21, and the rotation shafts of the electric motors 20, 20 and the transmission gear 2 are provided.
The rotation shafts 2 and 22 are connected to each other via rotation transmission mechanisms 23 and 23 including a chain wheel and a chain. Note that the transmission gears 22 and 22 are
And is lowered by the contraction operation of the air cylinder 18 and meshed with the gears 12 and 12 (the state shown in FIG. 2). The gear is raised by the extension operation and disengaged from the gears 12 and 12. . That is, the portal frames 13, 13
The mechanism installed in the device is a rotational force transmitting means R as a whole.

The above-described structure is such that the vertically split shell molds 1 and 2 are set before and after the fixing plate 8 at a mold setting station (not shown) on the right movable carriage 4 in the state of FIG. The moving carriage 4 at the center is carried in below the rotational force transmitting means R, and the air cylinder 18 is contracted and the transmission gears 22 and 22 are moved to the gear 1.
It is in a state of being meshed with 2, 12. In addition, the left carriage 4 is in a state where the vertically split shell molds 1 and 2 are clamped.

In the above-mentioned state, the electric motors 20, 20 operate and the transmission gears 22, 2, via the rotation transmitting mechanisms 23, 23.
2 and the gears 12 and 12 are rotated. This gear 12, 1
2 rotates the nut bodies 9 and 9 so that the screw shaft 1
The moving plates 11, 11 are moved forward by moving the moving plates 11, 11 to the shell mold 1,
2 and the two sets of shell molds 1 and 2 on the movable carriage 4 are clamped and clamped by the fixed plate 8 and the movable plates 11 and 11. This clamp is stopped by obtaining an appropriate clamping force by controlling the rotation torque of the electric motors 20, 20 by the torque control function of the inverters 20A, 20A.

Next, the air cylinder 18 is extended and the tilting frame 19 is tilted up to raise the transmission gear 22 and the gear 1.
After the disengagement with the second carriage 2, the movable carriages 4 and 4 are pushed in a dumpling shape and moved to the left by one pitch (for one of the movable carriages 4). At the same time, the transmission gear 22 is moved down to mesh with the gear 12, and the state shown in FIGS. The above operation is repeatedly performed.

In the above embodiment, two sets of the moving plate 11 and its operating mechanism are provided on the moving trolley 4 and two units of rotational force transmitting means R corresponding to the two sets are provided. The moving plate 11 and its operating mechanism and the corresponding one unit of torque transmitting means R may be used. Further, the rail line 3 is a circulation line, but does not necessarily have to be a circulation line. Also, at the mold release station downstream of the pouring station on the rail line 3, the reverse operation of the rotational force transmitting means R is performed (the movable plate 11 is moved backward by meshing and rotating with the gear 12 on the movable carriage 4). By disposing the clamp releasing means for releasing the clamping of the shell molds 1 and 2, the mold separating operation can be automatically performed.

[0013]

As is apparent from the above description, the present invention provides a movable carriage on a rail line with a fixed plate, a movable plate and its operating mechanism, and a position between a mold setting station and a pouring station. The upper portion is provided with a rotating force transmitting means which is disengaged from the moving plate and its operating mechanism by moving up and down and is driven by an electric motor with an inverter. It can be clamped properly and properly. In addition, the movable plate and its operating mechanism are respectively provided on the movable trolley corresponding to the front and rear surfaces of the fixed plate, and two units of rotational force transmitting means corresponding to the movable plate and the operating mechanism are provided to improve the productivity. There are various effects such as possible.

[Brief description of the drawings]

FIG. 1 is a front view showing a main part of an embodiment of the present invention.

FIG. 2 is a view taken in the direction of arrows AA in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 2 Vertical split shell mold 3 Rail line 4 Moving carriage 8 Fixed plate 9 Nut body 10 Screw shaft Moving plate 12 Gear 18 Air cylinder 19 Tilt frame 20A Inverter 20 Electric motor 22 Transmission gear 23 Rotation transmission mechanism R Rotational force transmission means

Claims (4)

[Claims] 1. A plurality of movable vehicles 4, 4 are movably arranged on a rail line 3 laid from a mold setting station to a pouring station and a mold release station. An upper fixed plate 8 and a nut body 9 rotatably supported via bearings at the upper part
Plate 1 connected to the tip of screw shaft 10 threaded through
1 and the gear 1
2 is concentrically connected, while an air cylinder 1 is provided above the position between the mold setting station and the pouring station.
8, a tilting frame 19 which can be moved up and down is provided, an electric motor 20 provided with an inverter 20A is provided above the tilting frame 19, and the tilting frame 19 with respect to the gear 12 is provided below the tilting frame 19. At the lower end, a transmission gear 22 that can be meshed at the lower end is attached, and a rotational force transmitting means R is provided that connects a rotation shaft of the electric motor 20 and a rotation shaft of the transmission gear 22 via a rotation transmission mechanism 23. Vertical split shell mold clamping equipment. 2. A moving plate 11 on the moving carriage 4 and an operation mechanism thereof are disposed on both front and rear surfaces of the fixed plate 8 so as to face each other. 2 corresponding to the set of moving plates 11 and their operating mechanisms
2. The clamping device for a vertically split shell mold according to claim 1, wherein a unit is provided. 3. The vertical split shell mold clamping equipment according to claim 1, wherein said rail line 3 is an endless circulation line. 4. The apparatus according to claim 1, wherein said mold release station is provided with a clamp releasing means for engaging and rotating with the gear wheel 12 on said movable carriage 4 to retract the movable plate 11 and release the clamp of the shell molds 1, 2. The clamping device for a vertically split shell mold according to claim 1, 2, or 3.