JP3491804B2 - Mold making equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention supplies molding sand to a space defined by a pattern plate and a molding frame, and reserves the molding sand near the inner surface of the molding frame with respect to the supplied molding sand. The present invention relates to an apparatus for forming a mold by compressing and then compressing the entire foundry sand.

[0002]

2. Description of the Related Art Conventionally, Japanese Laid-Open Patent Publication No. 9-1288 filed by the applicant of the present invention has been known as a mold making apparatus as described above, and in this mold making, the supply of foundry sand into a molding flask is as follows. It is designed to be charged by various methods such as gravity drop. Therefore, the foundry sand may spill from the casting frame or the filling frame, and there is a problem that equipment for collecting the spilled sand is required. In addition, when the molding sand is dropped by gravity, the molding sand is not uniformly supplied to the entire surface of the casting frame, but is unevenly supplied. There was a problem that a stapling phenomenon occurred and the entire casting sand could not be uniformly compressed.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and supplies the molding sand to the space defined by the pattern plate and the flask, and with respect to the supplied molding sand. By pre-compressing the molding sand in the vicinity of the inner surface of the casting frame, then in an apparatus for molding the mold by compressing the entire molding sand, when compressing the entire molding sand by eliminating the offset supply of the molding sand,
It is an object of the present invention to provide a mold making apparatus that does not cause a plucking phenomenon and does not cause sand spillage due to sand supply.

[0004]

In order to achieve the above object, the first mold making apparatus of the present invention is such that a casting is provided above a table in which a pattern plate is mounted on the upper surface so as to be vertically movable. A blow head for both sand blowing and squeeze is provided, and a thin plate annular body composed of a large number of strips and having a tubular shape as a whole is provided through the flange at the lower end peripheral edge of the blow head so as to be vertically movable. The second mold making apparatus is capable of moving up and down with a blow head for blowing the molding sand above the table which is provided with a pattern plate mounted on the upper surface so that it can be moved up and down. And a squeeze head which are arranged alternately so that the squeeze head can be taken in and out alternately, and a thin plate annular body which is formed of a large number of strips and has a tubular shape as a whole with respect to the flange at the lower end periphery of the blow head. The third mold making apparatus is characterized in that it is arranged so that it can be moved downward and is penetrated. The casting mold is blown into the upper part of a table in which a pattern plate is attached to the upper surface so that it can be moved up and down. The blow head and the squeeze head that can be moved up and down are alternately arranged so that they can be taken in and out, and the outer peripheral edge of the lower end of the blow head,
A thin plate annular body composed of a thin plate and having a tubular shape as a whole is fitted so as to be vertically movable, and at the outer position of the thin plate annular body at the lower end of the blow head, a gap upper portion between the casting frame and the thin plate annular body is provided. The fourth aspect of the present invention is characterized in that a frame plate for closing is arranged.
A blow head, which also functions as a blower for casting sand and a squeeze, is placed above a table on which a template is attached so that it can be moved up and down. The thin plate annular body forming the above is fitted so as to be vertically movable, and the frame plate for closing the upper part of the gap between the casting frame and the thin plate annular body is arranged at the outer position of the thin plate annular body at the lower end of the blow head. According to the fifth mold making apparatus of the first, second, third, or fourth mold making apparatus, the fifth mold making apparatus conveys the flask to a position between the vertically movable table and the blow head. It is characterized in that a roller conveyor and a filling frame capable of moving up and down corresponding to the casting frame are provided.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings. In FIG. 1, four columns 2, 2 (two of which are shown in FIG. 1) are erected at the center of the box frame 1, and the columns 2, 2 are located at the lower center positions. Is provided with an upward cylinder 3 via a frame 4. A table 5 is fixed to the tip of the piston rod of the upward cylinder 3 so as to be movable up and down, and a pattern plate 6 having a pattern on its upper surface is attached to the upper portion of the table 5. At the intermediate position of the box-frame-shaped frame 1 (above the table 5), a hollow roller conveyor 8 for transferring the molding frame 7 is installed extending in the left-right direction, and the ceiling hollow upper roller conveyor 8 is also installed. 9 extends in the left-right direction and is installed. Two carriages 10 and 11 are connected to the upper punching roller conveyor 9 by a connecting link 12
The carriage 10 and 11 are reciprocally moved by a cylinder (not shown), and are connected to each other via a table 5 to which the pattern plate 6 is attached.
Are arranged so as to be alternately located above. A sand cylinder 15 whose upper portion communicates with a compressed air source 13 via a valve 14 is suspended from the trolley 10.
An opening / closing lid 16 is provided at the upper end of the blow head, and a blowing plate 18 having a large number of sand blow openings 17 is attached at the lower end thereof via a flange 19 to form a blow head 20 as a whole. The blowing plate 18 is formed to have a size that allows it to be fitted into the filling frame 30 described later.

Further, a pair of cylinders 21 and 21 are fixed downward on the outside of the sand cylinder 15, and a frame-shaped mounting body 22 is attached to the sand cylinder 15 at the tip of the piston rod of the cylinders 21 and 21. It is fixed so that it can move up and down. As shown in FIG. 2, a thin plate annular body 24 having a tubular shape as a whole is suspended from a lower portion of the attachment body 22 by a large number of strips 23, 23 corresponding to the vicinity of the inner surface of the casting frame 7. The thin plate annular body 24 is inserted through the flange 19 of the sand cylinder 15 and the blowing plate 18 so as to be vertically slidable, and its tip (lower end) is flush with the lower surface of the blowing plate 18. There is. A mounting frame 26 is provided on the dolly 11 via a suspension plate 25, and a downward cylinder 28 is provided on the mounting frame 26 via a support plate 27. A squeeze plate 29 that can be fitted into the inside of a fill frame 30 to be described later
Is installed. Further, a fill frame 30 having an opening having the same diameter as that of the casting frame 7 is placed on a support frame (not shown) between the blowout roller 20 and the hollowing roller conveyor 8 above the table 5. It is arranged so that it can be raised and lowered.

With such a construction, the upward cylinder 3 is operated in the state of FIG. 1 in which the sand cylinder 15 is replenished with the molding sand S, and the pattern plate 6 is raised together with the table 5 to raise the casting frame 7 and As the filling frame 30 is sequentially lifted, as shown in FIG. 3, the upper portion of the space defined by the pattern plate 6, the casting frame 7, and the filling frame 30 is placed at the blowing plate 18 of the blow head 20.
Stop at the place where the space is closed and closed. Next, the valve 14 is opened and compressed air is introduced into the blow head 20 so that the molding sand S is blown into the closed space together with the compressed air and the state is as shown in FIG. At this time, the foundry sand S is supplied together with the compressed air into the closed space, so that the entire area of the casting frame 7 (including the fill frame 30) is supplied and filled with a uniform sand density without causing sand spillage. . Next, the cylinders 21 and 21 are actuated to lower the thin plate annular body 24 composed of a large number of strips 23 and 23 to pre-compress the molding sand on the inner surface of the flask as shown in FIG. Next, the cylinder 21,
21 reversely operates, the thin plate annular body 24 is extracted from the foundry sand S and brought into the state shown in FIG. 6 to complete the preliminary compression of the foundry sand.

Next, a cylinder (not shown) is actuated to move the carriages 10 and 11 to the left to position the squeeze plate 29 above the fill frame 30 and the state shown in FIG. When the squeeze plate 29 is operated, the squeeze plate 29 is pressure-inserted into the filling frame 30, and the entire molding sand S is compressed as shown in FIG. 8 to mold the mold. For the compression of the entire foundry sand, a plate-shaped pressing plate is used, but another pressing means such as a segment squeeze hood or a diaphragm squeeze hood may be used. Next, the downward cylinder 28 is reversely operated to pull up the squeeze plate 29 from the filling frame 30, and the upward cylinder 3
Is reversely operated to return the filling frame 30 and the casting frame 7 to their original positions (positions in FIG. 1), and the pattern plate 6 is die-cut from the molded mold to obtain the state of FIG. In the following, the casting mold in which the mold is formed is transferred via the hollowing roller conveyor 8 and the empty casting frame 7 is carried in below the filling frame 30 to replenish the casting sand into the sand cylinder 15 of the blow head 20. After trolley 1
0 and 11 are moved rightward to be in the state of FIG. 1 and the above operation is repeated. In the above embodiment, the entire molding sand is compressed by the squeeze plate 29, but the mechanism of the squeeze plate is deleted and the upward cylinder 3 is further moved upward from the state of FIG. Three
It is also possible to insert the molding sand by pressurizing and inserting the molding sand into the inside of No. 0. Further, as shown in FIG. 10, a thin plate annular body 24A is formed by a thin plate and has a tubular shape as a whole, and a thin plate annular body 24A is fitted to the outer peripheral edge of the lower end of the blow head 20 so as to be vertically movable. A frame plate 19A for closing the upper part of the gap between the casting frame 7 and the thin plate annular body 24A at the outer position of the thin plate annular body 24A at the lower end of the frame and preventing the ejection of the molding sand during the blowing of the molding sand. The device may be suspended from the dolly 10. In this case, a squeeze mechanism for compressing the entire foundry sand is separately provided on the dolly 11 as shown in FIG. 1, but is omitted in FIG. Although the frame plate 19A is attached to the carriage 10, it may be integrally attached to the upper portion of the filling frame 30.

[0009]

As is apparent from the above description, the present invention provides the blow head for blowing the casting sand above the table having the pattern plate mounted on the upper surface so as to be able to move up and down. Since the thin plate annular body, which is composed of a large number of strips and has a tubular shape as a whole, is vertically movably arranged through the flange at the lower end peripheral edge of the blow head, the molding sand is used as a pattern plate and a casting plate. There is no sand spill when it is supplied to the space defined by the frame, and it is supplied with a uniform sand density over the entire casting frame, so that when the entire casting sand is compressed, no fuzz phenomenon occurs. It has an excellent effect.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view of an essential part showing an embodiment of the present invention.

FIG. 2 is a view on arrow AA in FIG.

FIG. 3 is a vertical cross-sectional front view of essential parts showing a state of preparation for supply of foundry sand.

FIG. 4 is a vertical cross-sectional front view of essential parts showing a state of supply of foundry sand.

FIG. 5 is a vertical sectional front view of essential parts showing a pre-compressed state of foundry sand.

FIG. 6 is a vertical cross-sectional front view of essential parts showing a state in which preliminary compression of foundry sand is completed.

FIG. 7 is a vertical cross-sectional front view of essential parts showing a state where the entire molding sand is prepared for compression.

FIG. 8 is a vertical cross-sectional front view of essential parts showing the entire state of compression of the foundry sand.

FIG. 9 is a vertical cross-sectional front view of essential parts showing a completed state of mold making.

FIG. 10 is a vertical sectional front view showing a main part of another embodiment of the present invention.

[Explanation of symbols]

5 tables 6 pattern plates 7 Casting frame 8 hollow roller conveyor 19 flange 19A frame plate 20 blow head 23 strips 24 Thin plate annular body composed of strips 24A thin plate annular body composed of thin plates 29 Squeeze head 30 frame S Foundry sand

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-5-60642 (JP, A) JP-A-2-290649 (JP, A) JP-A-56-36362 (JP, A) JP-A-6- 335748 (JP, A) Actual Kaihei 1-177046 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) B22C 5 / 00-25 / 00

Claims (5)

(57) [Claims] 1. A blow head 20, which is used both for blowing a casting sand and for squeezing, is provided above a table 5 which is provided with a pattern plate 6 mounted on the upper surface so as to be able to move up and down, and a lower end peripheral edge of the blow head 20. A thin plate annular body 24, which is composed of a large number of strips 23 and 23 and has a tubular shape as a whole, is vertically movably provided through the flange 19 so as to penetrate therethrough. 2. A blow head 20 for injecting foundry sand and a squeeze head 29 movable up and down are alternately provided above a table 5 in which a pattern plate 6 is mounted on the upper surface so as to be vertically movable. A thin plate annular body 24 composed of a large number of strips 23 and 23 and having a tubular shape as a whole is vertically arranged to be movable up and down with respect to the flange 19 at the lower end periphery of the blow head 20. A mold making apparatus characterized by being installed. 3. A blow head 20 for injecting foundry sand and a squeeze head 29 movable up and down are alternately provided above a table 5 provided with a pattern plate 6 mounted on the upper surface so as to be vertically movable. A thin plate annular body 24A, which is made of a thin plate and has a tubular shape as a whole, is vertically movably fitted to the outer peripheral edge of the lower end of the blow head 20, and the blow head 20 is fitted in and out. A mold making apparatus characterized in that a frame plate 19A for closing an upper portion of a gap between the casting frame 7 and the thin plate annular body 24A is arranged at an outer position of the thin plate annular body 24A at a lower end. 4. A blow head 20, which is used both for blowing the casting sand and for squeezing, is provided above a table 5 which is provided with a pattern plate 6 mounted on the upper surface so as to be able to move up and down, and outside the lower end of the blow head 20. A thin plate annular body 24A, which is made of a thin plate and has a cylindrical shape as a whole, is fitted to the peripheral edge so as to be vertically movable, and the molding frame 7 is provided at a lower end of the blow head 20 outside the thin plate annular body 24A. A mold making apparatus characterized in that a frame plate 19A for closing an upper portion of a gap between the thin plate annular body 24A is arranged. 5. A roller conveyor 8 that conveys the casting frame 7 and a fill frame 30 that can be raised and lowered corresponding to the casting frame 7 are arranged between the table 5 that can be raised and lowered and the blow head 20. The mold making apparatus according to claim 1, 2, 3 or 4, wherein the mold making apparatus is provided.