JPS6034272A - Prevention against sand leakage at doorway part in apron type shot blast - Google Patents

Abstract

PURPOSE:To prevent sand from leakage in time of projecting a casting as well as to reduce the occurrence of dust in and around a shot blast unit, by tilting upward a sand check plate being tiltably installed in position beneath an end part at the doorway side of an apron conveyor. CONSTITUTION:In time of casting projection onto an apron conveyor 4 inside a shot projection chamber 2, a sand check plate 10 is tilted upward by extension operation by a cylinder 14, while sand to fall plumb down with the turnover of a plate 6 at a turnover part of an end part at the doorway side of the apron conveyor 10 is received by this uptilted sand check plate 10, making the sand slidingly drop on a bottom plate 2a of the shot projection chamber 2, and any leakage of the sand from an opening lower end part 3a of a casting doorway 3 is kept back with the sand check plate 10. Next, when casting projection is over, the sand check plate 10 is tilted downward by contraction of the cylinder 14 and made to remain on standby there. Under this condition, a door is made to go down, closing the doorway 3 as well as rolling and stirring castings by the conveyor 4 and, aftersand dropping takes place with shot projection, the doorway 3 is opened, using the sand check plate 10 as a chute, whereby these castings are discharged onto the vibrating conveyor 20.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to an apron-type sheet blast for cleaning castings after demolding, and more particularly to a device for preventing sand leakage from an opening for introducing and discharging castings.

Conventional technology In apron-type shot blast blasting, in which sand is removed by projecting sand onto the casting while the casting is transferred and stirred by an apron conveyor in a shot projection chamber made up of a cabinet, the cleaning action is completed. By reversing the rear apron conveyor, the M objects are discharged below the entrance and onto the vibrating conveyor for unloading. In this case, in order to ensure that the discharged castings fall onto the vibrating conveyor, The lower IIS is extended and opened below one end of the apron conveyor, and the vibrating conveyor is disposed as close as possible below the opening. However, such a structure has the drawback that a large amount of sand leaks from the entrance and exit onto the vibrating conveyor and onto the floor, especially when casting is being introduced.

OBJECTS OF THE INVENTION An object of the present invention is to provide a sand leakage prevention device at the entrance and exit portion of an apron type shit blaster which can eliminate the above-mentioned drawbacks of the prior art.

Structure of the Invention The present invention provides an apron-type sidget punch, in which a sand stop plate is tiltably installed downward at the end 61 on the entrance/exit side of the apron conveyor, and the sand stop plate is adjusted to prevent sand during casting. ? This is designed to prevent the shaft from coming out and guide the discharged castings by tilting downward.

Embodiments Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings. As shown in the figure, in a shot projection chamber 2 made up of a cabinet 1, a bucket 1p-der (not shown) is used to transfer 6 pieces of cast metal into a shot projection chamber 2 which is made up of a cabinet 1 through an entrance 5 formed on one side of the cabinet 1. An apron conveyor 4 for dynamic agitation is arranged in a substantially L-shape via wheels 5. The apron conveyor 4 has multiple small holes through which sand and sheets can pass, and is constructed by connecting short cane plates 6 with multiple buttons, and is driven by an electric motor (not shown) capable of forward and reverse rotation. Rotationally driven. An impeller 7 is installed in the upper part of the cabinet 1 for projecting a jet onto the casting being stirred to create sand. Also, shot projection room 2 & board 2! L-iI to facilitate the collection of sand and whitebait
It is formed in the shape of a letter i, and a screw feeder 8 is installed in the paper section to feed sand and silt to the outside of the machine.

The lower end of the casting entrance/exit 6 is connected to the apron conveyor 4.
The opening extends to the lower blade 1 at the end, that is, a part of the sloping bottom surface of the shot projection chamber 2. (not shown) can be opened and closed. However, before b
A sand stop plate 1 [] is provided in the lower part 3a of the C entrance/exit 6 to prevent sand from leaking out from the opening part 6a. - That is, the sand stop plate 10 is the bottom plate 2a of the cabinet 1.
is rotatably supported via a bearing 11 on the outer surface of the horizontal
It is fixed to the support shaft 12 of the X via two left and right brackets 16, and can be tilted about the axis of the support shaft 12. Further, the cylinder 14 on the sand stop plate 10 disposed on the outer surface of the bottom plate 2a of the cabinet 1 is connected by a pin 16 to a bracket 15 whose base protrudes from the bottom plate 2a, and the piston rod 17 projects from the support shaft 12. The attached protrusion 18 and pin 1
The cylinder 14 is connected to the cylinder 14 so that the sand stop plate 10 can be tilted to an upward tilted position (C), which is the sand leakage prevention position, and a downward tilted position (0, which is the discharge casting guide position). It has become. Incidentally, 20 is a vibrating conveyor for carrying out the V-extruded castings.

The present example is constructed as described above, and when castings are placed on the apron conveyor 4 in the training and shooting house 2, the sand stop plate 10 is arranged as shown by the solid line in Fig. 2. cylinder 1
It is tilted upward by the extension action of 4. In this state, when castings are introduced while rotating the apron conveyor 4 in the normal direction (rotating in the direction of the arrow P in the figure), the sand separated from the castings falls through the small holes of the apron conveyor 4 and the gaps between the plates 6. . At this time, a considerable amount of sand on the lower plate 6 falls as the plate 6 is turned over at the inverted portion on the inlet/output end side of the apron conveyor 4, but this sand is removed by the sand stop plate 10. While being stopped, the sand stop plate 1
0 onto the bottom plate 2a of the shot projection chamber 2.

That is, the opening lower end 3 of the entrance/exit port 6 when casting is introduced.
Sand leakage from a is prevented by the sand stop plate 10.

When the casting is completed, the cylinder 14 is contracted and the stop plate 10ii is tilted downward as shown by the imaginary line in FIG. 2 and is on standby. Further, the door 9 is lowered to close the entrance/exit 6, and in this state, the apron conveyor 4 rolls and stirs the casting while the impeller 7 continues to project shots for a predetermined period of time.

When such a sand removal operation from the casting is completed, the door 9 is raised and the entrance/exit 3 is opened, and the apron conveyor 4 is reversed and the cleaned casting is discharged onto the vibrating conveyor 20 for carrying out. In this case, the sand stop plate 1 is waiting in the downward tilted position.
0 functions as a chute for the discharged vJ material, allowing the castings to fall reliably onto the vibrating conveyor without being caught in the middle.

Note that the actuating means for the sand stop plate 10 in this embodiment can be replaced by a cylinder and can use a Tanabata.

Effects of the Invention As detailed above, according to the present invention, it is possible to prevent sand from leaking from the entrance and exit when loading castings in an apron-type stop blast, thereby reducing the generation of dust around the stop blast and improving the working environment. This will be of great help for improvement. ~ Still, the sand stop plate of the present invention does not only have the function of sub-holding sand, but also has the ability to guide cast iron castings.
C1 The benefits are enormous.

[Brief explanation of the drawing]

The drawings are from v4. of the present invention. The flow side is shown, and FIG. 1 is an M sectional view showing the apron-type seatplast, FIG. 2 is a sectional view showing the swing part of the present invention, and FIG. 3 is a front view. 1... Cabinet 2... Scirot projection room 3...
・Entrance/exit 3m... Lower end of opening 4... Apron conveyor -0... Sand stop plate 14... Cylinder

Claims (1)

[Claims] In an apron-type sheet blaster in which an apron conveyor for stirring castings is used to form an entrance for taking in and out of castings, the sand stop plate is tiltably installed at the lower end of the entrance. A device for preventing sand leakage at the entrance and exit part of an apron-type seat blaster, characterized in that the plate is tilted upward to prevent sand from falling when charging castings, and tilted downward when discharging castings to form a cell that guides the discharged castings. .