JPH026036A - Molding machine - Google Patents

Abstract

PURPOSE:To reduce pressure loss of compressed air on a way from a surge tank to a cover member by opening/closing an exhaust hole as communicatable with an air supplying pipe in the surge tank fixed just above position of a table at upper part of the cover member as enabling come-in/come-out and ascent/descent. CONSTITUTION:Molding sand is packed into a flask 11 and a banking frame 12 with a sand charging hopper. Successively, the cover member 15 is shifted to just above position of the banking frame 12 and further by extending a cylinder 2, the table, etc., is ascended and the cover member 15 is placed on the banking frame 12 and also the cover member 15 is abutted on a patching plate 30 and at the same time, the upper end of the air supplying pipe 18 is abutted on the lower face of the surge tank 22 through a sealing member 32, and the air supplying pipe 18 is closely connected as communicating with an air vent hole 23. Successively, at the time of opening the air vent hole 23 by extending a cylinder 29, the compressed air in the surge tank 22 is exhausted from the air vent hole 23 and passed through the air supplying pipe 18 and an air supplying hole 19 in order, and flowed in the cover member 15 and penetrated in the molding sand in the banking frame 12 and the flask 11, and exhausted from an exhaust hole 4 through a vent hole 6 and recessed part 3.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention is a method of solidifying the molding sand along the surface of a model plate by passing compressed air through the molding sand filled in a molding flask. This invention relates to an improvement of a device for molding molds by squeezing.

(Prior Art and Problems) Conventionally, in this type of mold making equipment, the molding machine and the surge tank that stores the compressed air supplied to the machine have been installed separately, and they are made of long steel pipes or It was connected with a rubber hose. Therefore,
The compressed air released from the surge tank causes a large pressure loss before reaching the molding machine, so it is necessary to secure compressed air that is considerably higher than the pressure required for molding, resulting in problems such as the equipment becoming bulky. was there.

(Objective) The present invention has been made to solve the above problems.

(Structure) Hereinafter, the structure of the present invention will be explained in detail based on the drawings of the embodiments. An upwardly facing cylinder (2) is installed in the center of the base (1), and a table having an exhaust recess (3) and an exhaust hole (4) is installed at the upper end of the piston rod of the cylinder (2). (5) is fixed to the table (5), and a model plate (7) with vent holes (6) (6) passing through it vertically is mounted on the table (5). In addition, the base (1
) Column C3) (8) is erected at the four corners of the top, and two roller conveyors with flanges (9) (10') extending in the left and right direction are installed in the middle position of the column (8) (8"). are installed vertically at a required interval, and a flask (11) is movably arranged on the lower flange roller conveyor (lO). The filling frame r12) is supported so as to be able to rise via support means (13) (13) fixed to the columns (8) (8).The bottom surface of the filling frame (12) is A sealing member (14) is embedded in the upper flange roller conveyor (9).A cover member (15) that can be closed by providing a space in the upper end opening of the filling frame Cl2) can run on the upper flange roller conveyor (9). The cover member (15) has a shape in which the middle position of a rectangular cylinder is partitioned into upper and lower parts by a partition member (15a).The partition member (15a) of the cover member (15) A plurality of downward-facing cylinders (16) (16) are fixedly installed on the upper surface with their piston rods being hermetically sealed to the partition member (15a) and passing through the lower space of the cover member (15). A segment squeeze hood (17) is fixed to the lower end.Furthermore, the partition member (15a) of the cover member C15)
In the cover member (15), four air supply pipes (18) (18) extending higher than the upper end thereof are erected, and four air supply holes (19) (19) communicating with these are formed. Further, an annular seal member (20) is embedded in the lower end surface of the cover member (15).
A frame-like ceiling frame (21) is installed between the upper ends of (8), and the ceiling frame (21) is provided with a ceiling wall (22).
A surge tank (22) having a flat bottom wall (22b) and a flat bottom wall (22b) is installed, and the surge tank C22) is connected to a compressor (not shown) through an air supply hole (22c).

Furthermore, four exhaust holes (23) (23) are formed in the bottom wall (22b) of the surge tank (22) at positions directly above the air supply pipes (18) (18). (23) (23) has an inverted conical rectifier cone (2
4) are opened and closed by four valves (25) (25). In addition, the valve (25) (25) is attached to the lower end of the lifting rod (27') (2n) which is airtightly attached to the ceiling wall (22a) of the surge tank (22) via the holder (26) (26). The lifting rod (2
7) The upper ends of (27') are connected by a bridging member (28). Further, an upwardly facing cylinder (29) is fixedly installed on the surge tank (22), and the bridge member (28) is fixed to the upper end of the piston rod of the cylinder (29). The valve (
25) (25) goes up and down to open the exhaust hole (28) (23)
is configured to open and close. (30) is a patch plate fixed to the lower surface of the ceiling frame (21), (31) (8
2) is a sealing member.

Next, the operation of the device configured as described above will be explained.

First, the table (5) is expanded by the extension operation of the cylinder (2).
Then, the model plate (7) is raised, and the flask (11) is placed on the model plate (7), and the filling frame (12) is placed on the flask (11) in order in a superposed state, and then, - Once the cylinder (2) stops extending, the table (5), etc. stops rising. Next, the cover member (15) is moved outward from the position directly above the filling frame (12), and a sand hopper (not shown) is brought in because it is directly above the filling frame (12). Molding sand is charged and filled into the casting flask (11) and filling frame [12]. Next, the sand container hopper is moved outside and the cover member C15) is moved again to a position directly above the filling frame (11), and then the cylinder (2) is further extended and the table (5) etc. are raised. Then, place the cover member (15) on the filling frame (12), bring the cover member (15) into contact with the backing plate (30), and at the same time seal the upper end of the air supply pipe (18) C18). Element(
32) to the bottom surface of the surge tank (22), and connect the air supply pipe (18"l (18) to the exhaust hole (23) (23).
) to be airtightly connected. Next, the cylinder (29)
When the exhaust hole (2B) (23) is opened by extending the
), passes sequentially through the air supply pipe (18) C18"l and the air supply hole (19) C19) and is discharged from the cover member (15).
). The compressed air that has flowed into the cover member (15) flows through the molding sand of the filling frame (12) and casting flask (11), passes through the vent holes (6), (6), and the recess (3), and then enters the exhaust hole ( 4) is discharged from. In this case, as the compressed air flows through the molding sand, the particles of the molding sand are made to flow toward the vent holes (6) (6) and deposited densely and firmly on the surface of the model plate (7). Model board (7)
A layer of solidified foundry sand is formed along the surface of the mold. After supplying compressed air to the cover member (15) for a predetermined time as shown in Part B, the cylinder (29) is contracted to close the exhaust hole (23) (23), and the cover member (15) is closed.
Stop supplying compressed air to. Next, the cylinder (1
6) Squeeze and solidify the molding sand in the filling frame (12) and the casting flask (11) by extending (16) and using the segment squeeze hood (17) C17). After the squeeze is completed, the cylinder (16) (1G) is contracted to raise the segment squeeze hood (17) (17), and then the cylinder (2) is contracted to lower the table (5). Then, first, cover member C1
5) is placed on the flange roller of the flange roller conveyor (9), and then the filling frame (12) is placed on the support means (13) (1
8) Cut the flask upward, and finally the flask (11) is placed on the flanged roller of the flanged roller conveyor (10) and the flask C1
1) Separate the mold from the model plate (7). After that, the flask (11) containing the mold is taken out and another empty flask (11) is transferred to the flanged roller conveyor (10).
) to a position directly above the model board (7), and one cycle is completed.

Note that the filling frame (12) may be omitted.

C effect) As is clear from the above explanation, the present invention has a model plate (7
), a cover member (15) with air supply pipes (1B) (18) erected thereon is disposed so as to be movable in and out and up and down. An air supply pipe (18) is placed directly above the table C5).
(1B) A surge tank (22) having an exhaust hole [23) C23) that can communicate with the exhaust hole (23) is fixedly provided.
(23) is opened and closed by the valve (25) (25), so compared to conventional devices of this type, the cover member and the surge tank are communicated in a straight line, and the distance between them is much shorter. Therefore, excellent effects such as extremely small pressure loss occurring until the compressed air is discharged from the surge tank (22) and reaches the cover member (15) are achieved.

[Brief explanation of the drawing]

The drawing is a longitudinal sectional view showing an embodiment of the present invention. C5): Table (6): Vent hole (7
) : Model board rll) : Casting flask (15) :
Cover member (17): Segment squeeze hood (18)
) : Air supply pipe (22) : Surge tank (2
2b) : Bottom wall (28) : Exhaust hole (25
) : Valve

Claims (1)

[Claims] A molding flask (11) is installed in a position directly above a table (5) which has a model plate (7) with a vent hole (6) attached to its upper surface and is movable up and down. The flask (1) is placed directly above the table (5).
1) A cover member (15) whose upper end opening can be closed by providing a space, and a sand container hopper are disposed so as to be able to be taken in and out and raised and lowered, and a plurality of segment squeeze hoods (17) are provided in the cover member (15). (17) is provided so as to be movable up and down, and the air supply pipe (1
8) (18) is erected, and a surge tank (22) connected to the compressor is fixedly provided at a position directly above the table (5) above the cover member (15), and the surge tank (22) is fixedly connected to the compressor. When the cover member (15) enters a position directly above the table (5) and is raised, the air supply pipe (18) (1
8) are formed in the surge tank (22) to form exhaust holes (23) (23) communicating with the surge tank (22).
A mold making device characterized in that valves (25) (25) for opening and closing the valves (25) are provided so as to be movable up and down.