JPH03146243A - Apparatus for molding casting mold - Google Patents

Abstract

PURPOSE:To mold a casting mold with molding sand uniformly compressed by drawing out a sand raking plate together with an upper raising flask in the side direction after charging the sane by assembling a casting flask, lower raising flask and the upper raising flask and compressing the raked sand with a squeezing plate. CONSTITUTION:On a molding table 4 fitting a pattern plate 3, the casting flask 23, lower raising flask 22 and upper raising flask 17 arranging the sane raking plate 19, are assembled in order. The molding sand is charged into these flasks from a molding sand hopper 6 providing a looper 6A. Successively, a compres sion member 7 is set into the upper raising flask 17 with a sideward cylinder 9. compressed air is introduced into a box 10 in this compression member 7 through a supplying tube 11 to precompress the above sand. After that, the above upper raising flask 17 is drawn out to the side direction with the other sideward cylinder 20. Then, upper part of the sand is raked with the above sand raking plate 19 and flattened to almost the same level as the lower raising flask 22. Successively, a downward cylinder 13 is extended to compress the molding sand through the squeezing plate 14. After that, the pattern plate 3 is taken out to obtain the casting mold molded in the casting flask 23.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention involves supplying molding sand into a space defined by a pattern grate, a casting flask, and a filling frame, and then supplying the molding sand to a space defined by a pattern grate, a casting flask, and a filling frame. This invention relates to a device for molding a mold by performing preliminary compression and compression using a squeeze grate.

(Prior art and problems) Conventionally, in the above-mentioned mold making equipment, when the molding sand is supplied into the flask, the molding sand piles up in a heaped state, and especially when the pattern plate has a high model part, The foundry sand forms a high mound.

For this reason, when molding sand is pre-compressed by compressed air aeration and then compressed using a squeeze plate, the high parts of the foundry sand are compressed first, and the low parts are compressed later. The filling rate is high, and the filling rate is low in areas with low molding sand, so the filling rate differs in each part of the mold, causing variations in mold hardness.

(Purpose) The present invention was made in view of the above problem, and is designed to agitate the foundry sand that is supplied into the flask and piled up in a heap before being compressed by a squeeze grate. It is an object of the present invention to provide a mold making apparatus that is configured to provide a mold making apparatus that has the following features.

(Means for Solving the Problem) In order to achieve the above object, the mold making apparatus of the present invention is capable of raising and lowering a bottom filling frame above a molding table that is movable up and down by attaching a pattern plate to its upper surface. A top filling frame that can be raised and lowered and moved in and out from the side is provided above the bottom filling frame. The scraping plate is installed so as to protrude slightly below the lower end of the upper filling frame, and a molding sand compression member equipped with a molding sand hopper, a flow air pressurizing mechanism, and a squeeze grate can be moved in and out above the upper filling frame. It is characterized by the fact that

(Example) To explain the configuration of the present invention in detail using illustrated examples, the base (
1) is provided with an upward cylinder (2), and at the upper end of the piston rod of the upward cylinder (2) is a modeling tape tv (4) having a pattern plate (3) attached to its upper surface.
is fixed.

A beam (5) is provided above the shaping tape 71/ (4) and is oriented in the left-right direction, and the beam (5) has a molding sand hopper (6) with a looper (6A) and a molding sand A compression member (7) is movably engaged via a roller (not shown).

Further, the foundry sand hopper (6) and the foundry sand compression member (7) are connected via a connecting frame (8), and the foundry sand hopper (6) is connected to the first part attached to the beam (5).
The molding sand hopper (6) and the molding sand compression member (7) are connected to the piston rod of the horizontal cylinder (9), and the molding sand hopper (6) and the molding sand compression member (7) are connected to the piston rod of the first horizontal cylinder (9).
) are arranged so that they can be alternately entered and removed directly above the

Now, to explain the structure of the foundry sand compression member (7), a compressed air supply pipe (11) is provided in the upper part of the box (10) whose lower end is open. The supply pipe (11) is provided with a pipe (12).
The upper end of is adapted to correspond to a crimp supply tube, not shown, located above in the position shown in FIG.

Also, a downward cylinder (1
3) is fixed through the downward cylinder (13).
) at the tip of the piston rod is a squeeze delay (14) whose size is slightly smaller than the inner diameter of the box (10).
is fixed.

Further, below the beam (5) are two roller conveyor frames (15) oriented in the same direction as the beam (5).
are placed at appropriate intervals in the front and back, and the suspension frame (16)
(16), and an upper stacking frame (17) is engaged with and mounted on the roller conveyor frame (15) so as to be movable up and down and laterally movable.

A downward hook (18) is attached to the left side of the upper filling frame (17), and its lower end is attached to the right side of the upper filling frame (17).
17) Sand hook board (1
9) is installed.

Further, a second horizontal cylinder (20) is provided at the lower left end of the beam (5).
) An upper M° hook (21) corresponding to the downward hook (18) is fixed to the tip of the piston rod.

Furthermore, below the upper filling frame (17), a lower filling frame (22) whose lowering is restricted by a stopper (not shown) is disposed so as to be able to rise and fall freely, and a pattern grate (3) is placed below the upper filling frame (17) by a roller conveyor (not shown). and bottom filling frame (22
) A casting flask (23) that can be moved in and out of the open position is placed (
In FIG. 1, the pattern plate (3) is shown on top of the pattern plate (3).

Note that (S) in the figure is foundry sand.

With this structure, the upward cylinder (2) is retracted in the state shown in FIG. 1 to position the modeling tape/L' (4) at the lowest position. As a result, the flask (23) is locked to an intermediate deposit roller (not shown), and the lower filling frame (22) is locked to a stopper (not shown).
7) Make it locked to the rollers of the roller conveyor frame (15).

In this state, molding sand (s) is charged into the molding sand hopper (6), and the first horizontal cylinder (9) is extended to position the molding sand hopper (6) directly above the upper filling frame (17). let

Next, the upward cylinder (2) is extended to open the flask (23).

Lower filling frame (22), upper filling frame (17), and foundry sand hopper (6
) is polymerized. At this time, the lower filling frame (22) and the upper filling frame (17) are slightly lifted from the straw bar (not shown) and from the rollers of the roller conveyor frame (15), respectively, and the molding sand hopper (6) has a bar ( 6A) is activated and the molding sand (S) is poured into the filling frame (17) (22) and the casting flask (
23) etc., and the state shown in FIG. 2(A) is obtained.

Next, the upward cylinder (2) is retracted slightly to create a slight gap between the molding sand hopper (6) and the upper filling frame (17), and then the first horizontal cylinder (9) is retracted. At the same time, move the foundry sand hopper (6) out of the machine.
7) to a position directly above the upper filling frame (17).

Next, the upward cylinder (2) is extended and the upper filling frame (17)
The molding sand compression member (-7) is brought into contact with the molding sand compression member (-7), and the upper end of the compressed air supply pipe (11) is crimped onto a crimping supply pipe (not shown) by being raised slightly, resulting in the state shown in FIG. 2 (b).

In this state, the on-off valve (12) is opened and compressed air is supplied to the molding sand (S) through the box (10) to ventilate the pattern play. It is evacuated to pre-compact the foundry sand (8).

Next, the upward cylinder (2) retracts and the upper filling frame (17)
is locked to the rollers of the roller conveyor frame (15) and stopped with a slight gap provided between it and the underlay frame (22). At this time, the downward hook (18) is connected to the upward hook (
21).

Next, the second horizontal cylinder (20) is retracted and the upper filling frame (
17) to the left to the state shown in Fig. 2 (c).

That is, when the upper filling frame (17) moves, the upper filling frame (17)
) and the sand scraping plate (19) scrape off the molding sand (S) on the top of the bottom filling frame (22) and make it almost parallel to the top surface of the bottom filling frame (22).

Next, the upward cylinder (2) is extended and the lower filling frame (22)
is pressed onto the lower part of the box (10), and the downward cylinder (13) is extended to actuate the squeeze spray (14) to compress and mold the molding sand (S) until it matches the upper surface of the flask (23). After reaching the state shown in Figure 2), the downward cylinder (13) is retracted and returned to its original state. During this time, foundry sand (S) is charged into the foundry sand hopper (6).

Next, the upward cylinder (2) retracts and molds the molded chive tv.
(4) Lower to the lowest position. This allows the lower filling frame (
22) is locked by a stopper (not shown), and a casting flask (23) containing a molding mold is locked by a hollow roller (not shown) to perform mold cutting with the pattern plate (3). The empty flask (23) is carried out by hollow rollers, and a new empty flask (23) is carried in. During this time, the first horizontal cylinders (9) and (20) extend and move the foundry sand hopper (6) and the upper filling frame (17) to the lower filling frame (22).
, and repeat the above operation.

(Effects) As is clear from the above description, the present invention arranges a laterally movable upper filling frame above the lower filling frame, attaches a sand scraping plate to this lower filling frame, and prepares a reserve of foundry sand. After compression, the upper filling frame is moved laterally and the upper surface of the lower filling frame is scraped off by a sand hook plate, which is an excellent feature in that the molding sand can be compressed almost uniformly by the squeeze plate. It has a tearful effect.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a partially cutaway front view, and FIG. 2 (a) to 2) are explanatory diagrams showing the operating state of the device. (3): Pattern play) (4): Molding table (6): Foundry sand hopper (7): Foundry sand compression member (9): First horizontal cylinder qO): Box 01): Compressed air supply pipe 04) Varnish Quiz plate 07): Upper filling frame α9): Sand scraping board C: Lower filling frame C■: Casting frame construction 2 Diagram (A)

Claims (1)

[Claims] A bottom filling frame is disposed so as to be movable up and down above the molding table, which is movable up and down by attaching a pattern plate to the upper surface thereof, and is movable up and down above the bottom filling frame and can be moved in and out from the lateral direction. A movable upper filling frame is provided, and a sand scraping board is attached to the tip of the upper filling frame on the entry side above the lower filling frame so as to protrude slightly downward from the lower end of the upper filling frame, and A mold making device characterized in that a molding sand compression member equipped with a molding sand hopper, a flow air pressurizing mechanism, and a squeeze plate is movably disposed above a filling frame.