JPS5942592B2 - Smoke exhaust system for turntable mold casting machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a smoke exhaust system for a turntable type mold casting machine that sucks and eliminates bad-smelling gas generated when pouring metal into the mold device of a mold casting machine placed on a turntable. It is related to the device.

Generally, when metal is poured into the matched mold device of a mold casting machine, foul-smelling gas is generated due to combustion of the molten metal core, etc., but when the mold casting machine is placed on a turntable, In the case of a turntable type mold casting machine, the mold casting machine produces a cast product by sequentially passing through each working part such as cleaning the mold equipment, inserting the core, matching the molds, and pouring the metal. There is no suitable device to suck and remove the foul-smelling gas generated by the rotation to a dust collector or deodorizing device installed at a predetermined location, and therefore the surrounding environment is harmed by the foul-smelling gas, causing subodor pollution. It has the disadvantage of being the cause.

The present invention aims to eliminate the above-mentioned drawbacks, and the embodiments shown in the drawings will be described in detail below.

1 is a turntable rotatable in a horizontal plane, and the center of the turntable 1 is a vertical rotating shaft 4 rotatably supported by a bearing 3 fixed to a support frame 2 erected from a foundation. is integrally connected to the tip of the turntable 1 via a stepped flange 5, and an annular tire 6 with an inclined surface is fixed to the lower surface of the turntable 1 around the rotating shaft 4. Further, the sloped surface of the tire 6 is brought into contact with the sloped surface of a tapered roller-shaped receiving roller 9 that is rotatably supported by bearings 8 fixed on a plurality of pedestals 7 erected from the foundation. The turntable 1 is supported by a plurality of receiving rollers 9 via tires 6 so as to be rotatable about a rotating shaft 4.

Further, below the turntable 1, a motor 11 for driving the turntable 1 is mounted on a base 10 attached to the base.
and a gear box 12 are installed in parallel, a small chain gear 14 is fixed to the tip of the drive shaft 13 of the motor 11, and the small chain gear 14 is rotatably supported by the gear box 12 in a horizontal direction. A large chain gear 16 fixed to the tip of the driven shaft 15 is connected by a roller chain 17, and an orthogonal bevel gear (not shown) is fixed to the other end of the driven shaft 15 located in the gear box 12. The bevel gear has a small gear 18 fixed to its upper end and meshes with an orthogonal bevel gear (not shown) fixed to the lower end of a vertical shaft 19 rotatably supported by the gear box 12. The turntable 1 is positioned so as to mesh with a large gear 20 fixed to the lower surface around the rotating shaft 4. Therefore, the turntable 1 is driven by the motor 11 to drive the small chain gear 14, the roller chain 17, the large chain gear 16, and the gear box 12. Small gear 18 and large gear 20 rotated through
It is designed to be rotated by engagement with the 21
is a mold casting machine having a vertically split mold device 22 with a vertical mold mating surface, and a plurality of mold devices 22 are placed radially on a turntable 1, and each mold device 22 is placed on a turntable 1. Fixed die bases 2 are erected facing each other at intervals.
A movable mold 29 is attached to the front surface of a movable die plate 27 with an integral groove structure through a movable plate 28. and a fixed mold 31 which is attached to the die base 24 via a fixed plate 30 so that the molds can be matched with the movable mold 29. The movable die plate 27 is connected to the mold device 22 horizontally attached to the die base 23 by closely contacting the mold matching surface 3V on the surface to form a mold recess for a cast product. It is connected to the tip of a piston rod 33 of a cylinder 32 for opening and closing, and when the cylinder 32 operates, the movable die plate 2
7 is moved in the horizontal direction along each tie bar 25' through a guide tube 26 along with a movable mold 29 to perform mold matching and mold opening of the mold device 22.

34 is fixed to the upper surface of the movable die plate 27 and has a rectangular cylindrical cross section with an opening 34' at the rear end located on the side of the movable die 29 and an opening 34'' at the other end facing upward. opening 34 on the side of the movable mold 29 in the smoke exhaust duct.
' is a smoke exhaust hood 3 whose bottom wall at the tip is an opening 35'.
5 is fitted so that its rear end, which has an angular cross section, can be communicated with, and the rear end is fixed to a rotating shaft 34a rotatably supported near the opening 34' of the smoke exhaust duct 34. When the smoke exhaust hood 35 is in a horizontal state, its tip side is located on the movable mold 29 side, and the opening 35 is movable. Mold 2
Therefore, the smoke exhaust hood 35 is moved together with the movable die plate 27 when the movable mold 29 and the fixed mold 31 are brought together by the operation of the cylinder 32, and is moved between the two. Closely attached molding surfaces 29', 31'
It is located above and can suck out the foul-smelling gas that is generated when pouring metal, and is moved when the mold is opened for cleaning, inserting cores, etc., so that there is no problem with these operations. Further, the tip of a pitron rod 37 of a reversing cylinder 36 swingably attached to the upper surface of the smoke exhaust duct 34 is connected to the upper surface of the smoke exhaust hood 35 via a connecting member 37'. Reversing cylinder 36
As a result of this operation, the smoke exhaust hood 35 can be rotated about the rotating shaft 34a from a substantially horizontal position to a substantially horizontal position.

Further, both side walls near the rear end of the smoke exhaust duct 34 and corresponding side walls of the opening 34I at the tip are integrally connected by a frame 38 made of angle iron with the opening 34 being horizontal. In addition, a mold device 22 with a cylinder 32 is installed between both frames 38 that continue with the opening 34.
Plate member 3 over a distance slightly longer than the opening/closing stroke of
8a is stretched. A smoke exhaust hood 3 39 is supported concentrically with the turntable 1 by support members protruding from a plurality of columns 40 erected on the turntable 1.
The rotary duct 30 is an annular rotary duct provided above the turntable 1 and rotates in the same direction together with the turntable 1, and has a U-shaped cross section and an opening 39 on the outer surface.
', and a plurality of branch ducts 39a having a rectangular cylindrical cross section are protruded downward from the lower surface corresponding to each mold casting machine 21, and an opening 39a5 at the tip of the branch duct 39a is provided.
A sealing member such as a rubber plate is attached around the periphery, and when the mold device 22 of the mold casting machine 21 is fitted, the opening 39a' of the branch duct 39a is connected to the smoke exhaust duct 34.
Therefore, the smoke exhaust hood 35 can communicate with the branch duct 39a through the smoke exhaust duct 34, and is movable by the cylinder 32. When the smoke exhaust duct 34 moves with the movement of the mold opening of the mold 29, the communication between the smoke exhaust duct 34 and the branch duct 39a is cut off, and the opening 3
9a'11 is slid onto the plate member 38a stretched between the horizontal portions of the frame 38 through the seal member, is positioned on the plate member 38a, and is closed, and therefore enters the branch duct 39a. It is designed so that outside air is not sucked in.

Furthermore, as shown in FIG. 2, the outer periphery of the rotating duct 39 is provided with an opening 41 that is concentric with the turntable 1 and has a cross-sectional shape facing the opening 39' of the rotating duct 39.
An annular fixed duct 41 is fixedly installed in a U-shape with a slight gap provided to the outside of the rotary duct 39 in a fitted state. is formed, and the rotating duct 39 and the fixed duct 4
The gap formed between the top and bottom walls of 1 is
It is closed with a rubber seal 44 which is fixed to a flange provided in the opening 41 u of the fixed duct 41 with a seal presser 43 and whose ends are brought into contact with the top and bottom walls of the rotating duct 39, thus closing the ventilation path. 42 is shielded from the outside to be in a sealed state, and the rotation of the rotating duct 30 is carried out by sliding on the rubber seal 44 of the fixed duct 41 to maintain the sealed state. A parallel joint pipe 45 is branched from a part of the outer circumferential wall of the fixed duct 41 from the pouring position to the cast product take-out position, and the parallel joint pipe 45 is connected to the bent pipe joint 46 to exhaust smoke. The ventilation passage 42 is connected to a fixed suction pipe 47 for smoke exhaust through a fixed duct 41, and the fixed suction pipe 47 is connected to a dust collector or deodorizing device (not shown). etc., and the foul-smelling gas generated by pouring the metal into the mold device 22 passes through the smoke exhaust hood 35, the smoke exhaust duct 34, and the branch duct 39a to the rotary duct 39.
, is introduced into a ventilation path 42 formed by a fixed duct 41, and further passes through a parallel joint pipe 45, a bent pipe joint 46, and a fixed suction pipe 47 from the ventilation path 42, and is sucked and removed by a dust collector or the like and collected. It's summery. In addition, the mold device 22
Since no foul-smelling gas is generated during the period from the casting product removal position to the cleaning of the movable mold 29 and fixed mold 31 and the core insertion position before pouring, there is no need for suction by a dust collector, etc. Inside the fixed duct 41 at positions corresponding to the casting product take-out position and the core insertion position before pouring, there are partition plates 49 each having one end fixed to the inner side wall of the fixed duct 41 and a reinforcing member 48 attached to the side surface. An elastic plate member 5 is provided to protrude into the rotating duct 39 and is slidable on the partition plate 49 by contacting the inner wall of the rotating duct 39 with its tip end.
0 is fixed to form a blocking part 50', and therefore, the ventilation path 42 is blocked at two places by the blocking part 50', and cleaning and pouring of the movable mold 29 and the fixed mold 31 from the casting product take-out position are possible. The ventilation passage 42 between the hot water front and the core insertion position is designed so that the suction effect from a dust collector or the like does not reach thereto. Reference numeral 51 denotes a support member that is horizontally attached and held above each support column 40. On the upper surface of the tip side of each support member 51, the support member 51 is in contact with the lower flange portion and the outer surface of the bottom wall of the fixed duct 41. A horizontal roller 52 and a vertical roller 53 that provide guidance and support are each rotatably supported, and 54 is a table held on the upper end surface of each support 40 on which a hydraulic unit (not shown) or the like is placed. , 55 is a manual damper provided in the fixed suction pipe 47, and a plate member 57, which is slightly smaller than the cross-sectional area of the ventilation opening, is fixed to the middle part of a shaft 56 which is rotatably supported through the fixed suction pipe 47. In addition, the structure is such that a positioning plate 58 is fixed to one outer end of the shaft 56, and by changing the angle of the plate member 57, the air volume sucked by a dust collector etc. can be optimized for suction of malodorous gas. It is adjusted accordingly.

Note that the cross-sectional shapes of the rotating duct 39 and the fixed duct 41 are both U-shaped with openings 39' and 41' on the side surfaces, respectively. A ventilation passage 42 may also be formed. With this structure, the metal placed on the turntable 1 is rotated by the rotation of the turntable 1 through the small chain gear 14, the large chain gear 16, the small gear 18, etc. by the drive of the motor 11. When the matched mold device 22 of the mold casting machine 21 reaches the pouring position, the operator pours the metal into the mold recess of the mold device 22, and after pouring is completed, by activating the reversing cylinder 38. The opening 35 is opened by rotating the smoke exhaust hood 35 from a vertical position to a horizontal position.
' faces the mold matching surface 29 of the movable mold 29 (that is, the mold matching surfaces 29', 31'+ of the movable mold 29 and fixed mold 31 of the mold device 22 that are in close contact with each other) When the core etc. are burned by the molten metal, the foul-smelling gas that comes out from the mold device 22 is immediately sucked into the smoke exhaust hood 35 by the suction action acting on the smoke exhaust hood 35 by the dust collector, etc., and is exhausted. The smoke dust 34 is introduced into the annular ventilation passage 42 formed by the combination of the annular rotating duct 39 and the annular fixed duct 41 through the branch duct 39a that is in communication with the smoke exhaust duct 34 due to mold matching, and The smoke is sucked and discharged to a dust collector, deodorizing device, etc. (not shown) through a fixed suction pipe 47 for exhausting smoke connected to the fixed duct 41 from the core insertion position in front of the bath through the pouring position to the cast product removal position. and collected.

At this time, a partition plate 49 is attached to the inner side wall of the fixed duct 41 at a position corresponding to the casting product take-out position and the core insertion position before pouring, and the partition plate 49 is attached to the inner wall of the rotary duct 39. Since a blocking portion 50' is formed, the distal end of which contacts the movable mold 29, and fixes the slidable elastic plate member 50 to block the ventilation passage 42 at two places, the movable mold 29, The ventilation path 42 between the cleaning of the fixed mold 31 and the core insertion position before pouring is not susceptible to suction from dust collectors, etc., and as a result, suction from unnecessary locations is prevented. The system is shut off and the foul-smelling gas is efficiently suctioned and recovered using the minimum amount of suction air required. When the mold device 22 into which the molten metal has been poured while the foul-smelling gas is sucked and removed reaches the casting product removal position by the rotation of the turntable 1, the cylinder 32 is actuated and the movable mold 29 is moved back and removed from the fixed mold. The mold is opened from 31,
In the retracted position of the movable mold 29, the cast product is extruded from the mold surface by an unillustrated extrusion pin and released from the mold, and the smoke exhaust hood 35 is reversed from a horizontal state to a vertical state by the reverse operation of the reversing cylinder 36, and further Due to the retreat of the smoke exhaust duct 34 due to the retreat of the movable mold 29, the smoke exhaust duct 3
The communication between the turntable 4 and the branch duct 39a is cut off, and the opening 39a of the branch duct 39a is closed by the plate member 38a stretched over the frame 38. The rotary duct 39 also slides on a rubber seal 44 fixed to the flange portion of the fixed duct 41, and is rotated while keeping the ventilation passage 42 in a sealed state. When the mold device 22 passes through the cast product removal position due to the rotation of the turntable 1, the branch duct 39a corresponding to the mold device 22, together with the rotary duct 39 that slides and rotates on the fixed duct 41, The blocking part 50' of the ventilation passage 42, which is formed at a position corresponding to the casting product take-out position of the fixed duct 41, is moved to the side of the ventilation passage 42 that is not affected by the suction action of the dust collector, etc., and is moved to the side of the ventilation passage 42 that is not affected by the suction action of the dust collector, etc. The suction action to the duct 39a disappears, and therefore the suction action from the dust collector etc. is blocked by closing the opening 39a' of the branch duct 39a by the plate member 38a and blocking the ventilation passage 42 by the above-mentioned two blocking parts 507. The double seal prevents the suction of outside air from these areas, making it possible to suction and recover malodorous gas with the minimum necessary suction air volume. The mold device 22 is then opened.
is moved to the cleaning position by the rotation of the turntable 1 to clean the movable mold 29 and fixed mold 31, and then moved to the core insertion position before pouring, and a predetermined core is inserted by the operator. After the insertion is completed, the cylinder "32 is reversely operated to move the movable mold 29 forward, so that the mold mating surface 2
9' is brought into close contact with the mold matching surface 31' of the fixed mold 31, and at the same time, the smoke exhaust duct 34 is moved forward so that its opening 34'' is connected to the opening 39a' of the branch duct 39a through the sealing member. In this state, the mold device 22 is moved to the pouring position by the rotation of the turntable 1, and as the rotary duct 39 slides and rotates with respect to the fixed duct 41, the branch duct 39a is a ventilation path that passes through the other blocking part 50' of the ventilation path 42 formed at a position corresponding to the core insertion position before pouring the fixed duct 41, and is subjected to suction by a dust collector or the like. The mold is moved to the 42 side and subjected to a suction action, and thereafter, the above-mentioned pouring of metal, suction and removal of foul-smelling gas, removal of the cast product by opening the mold, etc. are repeated, and continuous production of the cast product is performed.
In addition, since the smoke exhaust hood 35 is moved together with the movable mold 29 and can be turned over on the movable mold 29, it does not interfere with operations such as cleaning the mold device 22, inserting cores, and pouring metal. Furthermore, the branch duct 39a is automatically opened only when it is necessary to suction and eliminate foul-smelling gas through the smoke exhaust duct 34.
It is possible to communicate with the device, and no special communication means is required. As is clear from the description of the above embodiments, according to the present invention, the foul-smelling gas generated from the mold device of the mold casting machine on the turntable is discharged from the smoke exhaust duct fixed to the mold device. Because it is sucked and collected through a fixed duct that is combined in a sliding relationship with a rotary duct that rotates with the turntable to form a ventilation path, the foul-smelling gas is always actively removed regardless of the rotation of the mold device by the turntable. The suction bow is reliably collected and the surrounding environment is not harmed, and suction from unnecessary areas is cut off, allowing efficient suction and collection of foul-smelling gas with the minimum necessary suction air volume, and smoke removal. The hood has many advantages, such as being movable and not interfering with operations such as cleaning the mold device, inserting the core, and pouring metal.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a partially cutaway front view, FIG. 2 is a partially cutaway front view of the main part, and FIG. 3 is a partially cutaway front view of the main part.
It is an AA arrow view of a figure. 1... Turntable 21... Mold casting machine, 22... Mold device, 35...
Smoke exhaust hood, 39... Rotating duct, 39'...
...Opening, 39a... Branch duct, 41.
...Fixed duct, 411...Opening, 42
...Ventilation passage, 47...Fixed suction pipe, 5
0'...Blocking part, 49...Partition plate, 5
0...Elastic plate member.

Claims (1)

[Claims] 1. A smoke exhaust hood 35 is movably provided on the mold device 22 of the mold casting machine 21 placed on the turntable 1, and above the smoke exhaust hood 35 there is an opening 39' on one side and an exhaust An annular rotating duct 39 equipped with a branch duct 39a that can communicate with the smoke hood 35 is supported concentrically on the turntable 1, and an opening 41' is provided on the outer periphery of the rotating duct 39 on the side opposite to the opening 39'. An annular fixed duct 41 is slidably combined to form an annular ventilation passage 42, and an inner side wall of the fixed duct 41 at a position corresponding to a casting product take-out position and a core insertion position before pouring. A partition plate 49 is attached to the partition plate 49, and a slidable elastic plate member 50 is fixed to the partition plate 49 so that the distal end contacts the inner wall of the rotary duct 39, thereby blocking the ventilation passage 42 at two places. A fixed suction pipe 47 for exhausting smoke is connected to the fixed duct 41 between the core insertion position before pouring, the pouring position, and the cast product take-out position. Smoke exhaust device for turntable type mold casting machine.