JPS63281746A - Cooling conveyor for sand mold - Google Patents

Abstract

PURPOSE:To prevent elongation of a rubber belt with weight of sand molds and to stably carry the sand molds by arranging fixed liners and movable liners, which are vertically moved, toward longitudinal direction of the belt at lower face of the rubber belt for a conveyor carrying the sand mold casting molten metal while cooling the molds. CONSTITUTION:The heat resistant belt 29 is used to the sand mold cooling conveyor 36 for carrying the sand mold to shake-out yard after casting, cooling and solidifying the molten metal into the sand mold combining a cope and drag. The heat resistant belt 29 is supported with plural fixed liners arranged as parallel toward longitudinal direction thereof and plural movable liners 12a, which are lower in the upper faces thereof than the fixed liners and vertically moved at the intermediate positions of the fixed liners, and is intermittently moved together with the rubber belt while supporting the load of the sand molds during carrying with the movable liners 12a, to carry the sand mold to the shake-out yarn. The load of the sand molds to the rubber belt is reduced and the elongation of the rubber belt during using is prevented and the rubber belt can carry the sand mold to shake-out yard from casting yard while cooling for a long distance.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a sand mold cooling conveyor that sequentially transfers and cools a row of sand molds extruded and poured in a continuous joint onto the top surface of a pouring table. It is.

Conventional technology Conventionally, a sand mold made by a molding machine is extruded from the molding machine onto a grid-shaped pouring table, and is successively joined to the sand mold in front of it, moving over the top of the pouring table and filling the sand mold at the position where molten metal is poured. The metal is poured into the mold hole formed on the joint surface of the rubber belt, and then transferred to a cooling conveyor that receives the bottom surface of the rubber belt with rollers, and as it moves, the heat from the molten metal is dissipated, and the next processing step is carried out. It is being transferred to.

Problems to be Solved by the Invention However, when the rubber belt of the cooling conveyor is rotated intermittently in synchronization with the intermittent movement of sand molds on the top surface of the pouring table, belt elongation occurs if a large load is applied to the rubber belt. It is not possible to carry out accurate intermittent transfer of sand molds, and as a cooling conveyor
Nowadays, sand molds are becoming larger in size, and there is a need for a cooling conveyor that can stably transport sand molds over long distances.

゛ In order to solve these problems, the present invention provides fixed rails that are arranged on the lower surface of a rubber belt in parallel with the longitudinal direction of the rubber belt at intervals and move up and down, and in the gap between the fixed rails. A cooling conveyor that is arranged so that one side is lower than the fixed rail, and is equipped with a movable rail for vertical movement and for moving the sand mold along with a rubber belt in the traveling direction, and the load of the sand mold is supported by the movable rail when the sand mold is moved. Since the belt is moved intermittently together with the rubber belt, the load on the belt is small, so the belt does not stretch during rotation, and the sand mold can be stably transported over a long distance.

Means to solve problems Hereinafter, the present invention will be explained in detail with reference to embodiment figures.

A plurality of left and right opposing columns 1.1 are assembled with appropriate gaps, left and right side frames 2, 2 are fixed to the upper ends, and a support frame 3 is successively installed at an intermediate position on the inner surface of each left and right opposing columns 1, 1. , bearings 4, 4 are installed at positions near both sides of the upper surface of each support frame 3, and a horizontal shaft 6 is provided with eccentric shafts 5.5 at both ends on the upper surface of each support frame 3.
are arranged so that the eccentric shafts 5, 5 at both ends are supported by bearings 4, 4, and a pair of circular disks 7.7 are loosely fitted to each horizontal shaft 6,
A rail 9° 9 corresponding to the circular disc 7.7 of each horizontal shaft 6 is fixed to the lower surface of the movable frame 8, which is shorter than the left and right side frames 2, 2.
Each rail 9, 9 is mounted on each horizontal axis 60-yen circular disk 7, a support plate 10 is fixed to the upper surface of the moving frame 8 with an appropriate gap in the front and back, and a large number of The leg plates 11 are erected in parallel in the left-right direction, and the movable liner 12a is fixed to the upper end of each leg plate 11 in the front-rear direction, and the left and right side frames 2,
A base frame 13a is provided on the lower surface of the support frame 2 near the front, and a first extrusion cylinder 14a is attached to the base frame 13a, and the plunger of the first extrusion cylinder 14a is connected to the movable frame 8 within the movable frame 8. An arm rod 15 is provided diagonally upwardly protruding from the eccentric shaft 5 at one end of each horizontal shaft 6 on the upper surface, and each arm rod 1
5 is pivotally attached to the connecting rod 16a, and the plunger of the second extrusion cylinder 14b installed on the base frame 13b provided on the lower surface of the front side of the left and right side frames 2, 2 is connected to the connecting rod 16a,
Bearings 17° 17 are installed on the upper surfaces of the left and right side frames 2, 2 at the front or rear positions of the leg plate 11 of the movable liner 12a, and bearings are installed at both ends of the fixed liner mounting base 18 in the shape of a rectangular tube, so that the center shaft 19 is rotated. Eccentric shafts 20.20, which are supported and eccentric from the center of the central shaft 19, protrude from both ends of the central shaft 19 and are mounted on bearings 17.17 of the left and right side frames 2, 2, alternately with each movable liner 12a. A corresponding fixed liner 12b is fixed to the top surface of each fixed liner mounting base 18 in the front-rear direction, and an arm rod 21 is provided obliquely downwardly protruding from one eccentric shaft 20 of each fixed liner mounting base 18, and each arm The rod 21 is pivotally connected to the connecting rod 16b, and a frame is provided on the upper surface of the front abutment of one side frame 2, and the third
An extrusion cylinder 14c is installed, the plunger of the third extrusion cylinder 14c is linked to the arm rod 21 near one end, and the fixed liner 12 is connected to the third extrusion cylinder 14c.
The vertical movement of the movable liner 12a is performed by the second extrusion cylinder 14b and the first extrusion cylinder 14a. Drive pulleys 23 are provided at upper and lower positions at the rear of the left and right side frames 2, 2 while supporting the IJs 22a and 22b.
A fixed liner 12b which pivotally supports an idling pulley 22c1 and a tension pulley 24, a roller 25 which is pivotally supported at a position below the left and right opposing pillars 1.
A roller mounting frame 27 with a large number of rollers 26 pivotally supported therein is installed in the gap between both ends of the drive pulley 23 and the idler boob IJ 22a, and a belt receiver 28 is installed.
The heat-resistant belt 2 is connected to the drive pulley 23, the idler pulley 22c1, and the tension pulley 24 from the free-rotating boo 'J22b and 22a.
9, the lower moving part of the heat-resistant belt 29 is received by the roller 25, the upper moving part is received by the movable liner 12a, the fixed liner 12b, and the left and right rollers 26, and one end of the shaft of the drive pulley 23 is placed outside. The clutch internal chain wheel 30 is fixed by protruding from the upper surface of the moving frame 8, an arm rod 31 is provided to protrude outward from the side leg plate 11 on the upper surface of the rear end of the moving frame 8, and a chain joint 32 is fixed to the arm rod 31. The roller chain 33, whose both ends are locked to the chain joint 32, is adjusted to the clutch internal chain wheel 30 and the chain wheel 34, which is pivotally supported on the side frame 2 in front of the chain joint 32, to move the movable liner 12a back and forth. A sand mold cooling conveyor 3 in which a drive pulley 23 is rotated intermittently in conjunction with each other, and skirt side plates 35 and 35 are erected on the upper surfaces of the left and right side frames 2, 2.
6.

Effects The sand mold cooling conveyor 36 according to the present invention is installed continuously on a pouring table that pours molten metal into the cavity of the sand mold, and the sand mold formed by the molding machine is continuously joined to the top surface of the pouring table. After pouring the molten metal, the molten metal is extruded into a shape and sequentially transferred to the upper surface of the heat-resistant belt 29 of the sand mold cooling conveyor 36.

In the upper moving part of the heat-resistant belt 29, when the heat-resistant belt 29 is stopped, the plunger of the third extrusion cylinder 14c extends and the central shaft 190 of the fixed liner mounting base 18 is fixed at both ends by the arm rods 21 and the connecting rod 16b. Eccentric shaft 20.
20 is slightly rotated to raise the fixed liner mounting base 18 along with the central shaft 19 by several mm, and the fixed liner 12b is brought into contact with the lower surface of the upper moving part of the heat-resistant belt 29. At this time, the movable liner 12a is fixed. A row of sand molds mounted in a continuous joint on the top surface of the pouring table, which is located lower than the liner 12b and further away from the heat-resistant belt 29, is intermittently extruded backward from the molding machine in synchronization with the extrusion of new sand molds. The sand mold row on the top surface of the pouring table is transferred to the sand mold cooling conveyor 3.
Transfer to sand mold cooling conveyor 36 from the pouring table.
Immediately before the row of sand molds transferred to the upper surface of the heat-resistant belt 29 in a continuous joint shape moves backward by one sand mold, the plunger of the second extrusion cylinder 14b extends and the connecting rod 16
A1 Slightly rotate the eccentric shafts 5, 5 at both ends of each horizontal shaft 6 through the arm rod 15 to raise each horizontal shaft 6, and connect each horizontal shaft 60 circular disc, 7 to the rail 9°9. The movable liner 12a is attached to the heat-resistant belt 2 by raising the moving frame 8 mounted on
After that, the third extrusion cylinder 140 is operated in reverse, and the fixed liner 12b is lowered and disintegrated from the lower surface of the heat-resistant belt 29, transferring the load of the sand mold row on the upper surface of the heat-resistant belt 29 to the movable liner 12a. The first extrusion cylinder 14a is supported during extrusion of the sand mold row of the pouring table.
The movable liner 12a is moved backward while the movable frame 8 is pushed rearward via the rails 9, 9 mounted on the circular disks 7.7 of the respective horizontal shafts 6 while extending the plunger by synchronously operating the movable frame 8.
is moved along with the heat-resistant belt 29 by the width of one sand mold. As the movable frame 8 moves rearward, the roller chain 33 rotates together via the chain joint 32 on the rear side of the movable frame 8, and the drive pulley 23 rotates via the clutch internal chain wheel 30 while the heat-resistant belt 29 Guide together. Then, after the heat-resistant belt 29 and the movable liner 12a move backward by the width of one sand mold, the fixed liner 12b is again raised by the third extrusion cylinder 14c and comes into contact with the lower surface of the heat-resistant belt 29, thereby forming the row of sand molds. Supporting the load, the second extrusion cylinder 14b operates in reverse, and the movable liner 12a descends, and the first extrusion cylinder 14a
is operated in reverse and the movable liner 12a moves forward to its original position together with the moving frame 8. At this time, the roller chain 33 rotates in the reverse direction, but the clutch internal chain wheel 30 and the drive pulley 23 are not interlocked by the clutch. It is cut off, and only the clutch internal chain wheel 30 rotates in the reverse direction. In this way, the heat-resistant belt 29 is intermittently rotated by the width of one sand mold while the fixed liner 12b moves up and down and the movable liner 12a moves up and down and back and forth on the lower surface of the upper moving part of the heat-resistant belt 29. The sand mold rows are moved in synchronization with the sand mold rows on the top surface of the pouring table. The applied belt load is extremely reduced, and the sand mold can be cooled and transferred stably without elongation of the belt, even if the sand mold becomes larger and the cooling line becomes longer. In the embodiment, the fixed liner 12b is moved up and down, but the same effect can be obtained even if the fixed liner 12b is fixed in the upper position and in contact with the lower surface of the heat-resistant belt 29. It has the remarkable effects mentioned above.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway side view of a sand mold cooling conveyor according to an embodiment of the present invention, Fig. 2 is an enlarged view taken along line A-A in Fig. 1, and Fig. 3 is a moving frame moving up and down, forward and backward movement. FIG. 4 is a partially enlarged side view showing the mechanism; FIG. 4 is a view taken along line B-B in FIG. 3; FIG. 5 is a partially enlarged side view showing the fixed liner mounting frame; FIG. - C line arrow view; Figure 7 is a side view of the rear end of the cooling conveyor with the roller chain of the drive pulley omitted;
FIG. 8 is a plan view thereof, FIG. 9 is a partially enlarged side view showing a drive mechanism using a roller chain of a drive pulley, and FIG. 10 is a view taken along line D--D. 1 post, 2 side frames, 5 eccentric shafts, 6 horizontal shafts, 7 circular discs,
8 moving frame, 9 rail, 12a movable liner, 12b fixed liner, 14a, 14b, 14c extrusion cylinder,
18 Fixed liner - mounting base, 19 central shaft, 20 eccentric shaft, 2
3 Drive pulley, 29 Heat-resistant belt, 30 Clutch internal chain wheel, 330-Ratien Figure 4

Claims (1)

[Claims] 1. Assemble a plurality of left and right opposing columns in the front and back direction to form an underframe of an appropriate length with left and right side frames fixed to the upper ends, and install idle pulleys at the top and bottom positions of the front end of the underframe, and at the rear end of the underframe. Drive pulleys, idle pulleys, tension pulleys, etc. are supported in the vertical positions, and the heat-resistant belt is adjusted in a circular manner, and a moving frame is installed in the underframe to enable back-and-forth movement and vertical movement. A large number of movable liners are arranged in parallel in the front-rear direction on the upper surface of the frame to contact the lower surface of the upper moving part of the heat-resistant belt through leg plates, and the fixed liner mounting frame is moved up and down on the upper surface of the underframe at a position below the movable liners. A fixed liner is placed in the gap between each movable liner and fixed to the fixed liner mounting frame, and the movable liner is movable at the rear end of the movable frame. An arm rod is protruded outward from the leg plate of the liner, and a roller chain whose both ends are locked to a chain joint fixed to the arm rod is secured to the drive pulley shaft. A sand mold cooling conveyor characterized in that a drive pulley is intermittently rotated in conjunction with the back and forth movement of a movable frame in coordination with a chain wheel that is pivotally supported.