JPH0446655A - Pressurized compression apparatus - Google Patents

Abstract

PURPOSE:To surely and uniformly pack molding sand by making controllably of pressurizing force and descendent position of a working rod, connecting a pressurizing rod with tip part of the working rod and enabling advancing/ retreating of the pressurizing rod in a flask. CONSTITUTION:At center part of a frame 6, an opening part 5 having larger than an opening part of the flask 2 is arranged. The flask 2 is laid on a pattern plate 1 and above this, the frame 6 is set. At upper part of the frame 6, a shifting table 12 is supported as controllable to shift/stop at the optional position in the horizontal plane. On the shifting table 12, a lifter, which can control the pressurizing force and/or the descendent position of working rod 19, is arranged. The pressurizing rod 21 is connected with the tip part of working rod 19 and can be advanced/retreated in the flask 2. By this method, the insufficient packing part to the molding sand is surely packed and the mold can be completed.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a pressurizing device for molding sand molds only by compression action.

(Prior Art and Problems) Conventionally, in order to create a sand mold without generating noise and vibration, a method is known in which molding sand in a casting flask is compressed using a 7-quiz plate.

However, when molding a mold using only compression using a squeeze plate, the narrow sanded area between the model and the frame wall, or the elongated l-cellar part provided on the model, is difficult to clog with sand, so only simple shapes can be used. I couldn't mold it.

Conventionally, sand clogging has been improved by compressing the molding sand using a segmented squeeze foot instead of a squeeze plate, but in the case of squeezing using a segmented foot, the squeeze foot is placed in correspondence with the low cup between the flasks. Because of this, the sand becomes compacted to some extent around areas with poor sand clogging, and this compacted sand obstructs the movement of the squeeze feet that are placed in response to areas with poor sand clogging. There was a problem with not being able to tighten it. Furthermore, since the position of the squeeze foot is fixed relative to the model, there is also the problem that pressure cannot be applied to the optimal position for each type of model. (Purpose) The present invention was made in view of the above problems. To provide a pressurizing device for molding a mold by reliably filling with sand the parts of a mold that have conventionally been clogged with sand.

(Means for solving the problem) In order to achieve the above object, the pressurizing compression device of the present invention has the following features:
A flat frame with an opening larger than the opening of the casting flask in the center is arranged so that it can be relatively moved in and out above the model plate on which the casting flask is placed, and a movable table is mounted on the top of the frame. An elevator is provided on the moving tape ρ so that it can be controlled to stop moving at any position in the x and y directions in a horizontal plane, and the pressing force and lowering position of the operating rod can be controlled. The present invention is characterized in that a pressure rod is connected to the frame so that the pressure rod can pass through the frame from above the opening and enter and exit the flask.

(Function) By adopting the above-mentioned device, the molding sand in the parts of the casting flask where sand clogging is bad is locally pressurized by the pressure rod V to create sufficient sand clogging, and then squeezed. Since the entire molding sand is squeezed by the member, a mold with good sand clogging can be produced over the entire area.

(Example) Embodiments of the present invention will be described below based on the drawings.

A casting flask (2) and a filling frame (3) are placed on the upper part of the model plate (1) so as not to be displaced by guide bins (not shown).

A squeeze plate (4) that can be raised and lowered by a cylinder or the like (not shown) is arranged above the flask (2) and the filling frame (3). Squeeze board (
4) A pressure compression device (P) is arranged in the open position. Now, to explain the pressure compression device (P), the casting flask (
2) At a slightly upper position of the casting frame (3), insert the center part into the casting frame (3).
2) A flat frame (6) with an opening (5) slightly larger than the opening of the filling frame (3) is connected to a cylinder (not shown), and is moved above the casting flask (2) and filling frame (3). It is set up so that it can be accessed.

Two horizontal guide lofts (8) (8) are provided in parallel at the left and right ends of the frame (6) through bearings (7) (7) in FIG. Lateral guide loft (8) (8) Lateral slider (9) (9)
are slidably fitted together, and two front and rear guide rods (l OX
IO) are fixedly installed in parallel at appropriate intervals on the left and right to integrally connect the horizontal sliders (9) (9).

The horizontal sliders (9) (9) are connected to a servo cylinder (not shown), etc., and are configured to move to any position in the left-right direction (X direction in FIG. 3) and stop.

Front and rear sliders (11) (11) are slidably fitted to the two front and rear guide rods (10) (10), and are movable between the upper portions of the front and rear squeeze rods (11) (11). A tape tv (12) is fixed to integrally connect the front and rear sliders (11) (11).

Note that the front and rear sliders (11) (11) are also connected to servo cylinders (not shown) and move in the front and rear direction (X direction in Figure 3).
It is configured so that it can be moved to any desired position and stopped.

A servo motor (13) is mounted on the moving table (12).
is attached to the servo motor (13), and a drive sprocket (14) is fixed to the rotating shaft of the servo motor (13).

- On the side facing the servo motor (13) on the moving table (12) (see Fig.
A driven sprocket (16) corresponding to the drive sprocket (14) is provided at the tip of the bracket (15), and both sprockets (14) and (16) An endless chain (17) is connected between them. The endless chain (17) has a connecting plate (1
The upper end of the operating rod (19) is connected via the moving tape /' (
12) and is fitted through the guide tube (20) provided in the guide tube (20).

Further, a pressure rod (21) is physically fixed to the lower end of the operating rod (19).

The servo motor (13) is a drive sprocket) (1
4) in the forward and reverse directions to raise and lower the operating rod (19), and control its rotational torque to change the downward force of the operating rod (19). ) can be controlled, and in addition, the actuating rod (19) can be stopped and held at any position.

The pressure rod (21) is positioned above the frame (6) at the uppermost position and penetrates the opening (5) at the lowermost position so as to be inserted into the flask (2) as shown in Fig. 4. It is set in.

The apparatus constructed in this manner operates a cylinder (not shown) in the state shown in FIGS. 1 to 3 to move the pressurizing and compressing device (P) from above the filling frame (3) to the side.

Next, after moving the sand supply device (not shown) above the filling frame (3), the sand supply device is placed in the space defined by the model plate (1), the casting flask (2), and the filling frame (3). Quantitatively supplies foundry sand (S). At this time, the supply amount of foundry sand (S) is
3) The amount that is below the top surface (3)
It will not overflow from the top and spill outside.

Next, the sand supply device (not shown) is installed in the casting flask (2) and the filling frame (3).
) and move the pressurized compression charge (P) above the casting flask (2) and filling flask (3), resulting in the state shown in FIGS. 1 to 3.

Next, the servo cylinders (not shown) of the horizontal sliders (9) (9) and the servo cylinders (not shown) of the front and rear sliders (11) (11) operate by a preprogrammed distance to move the moving table (12) into a pocket that is not easily clogged with sand. After moving the pressure rod (21) to a position corresponding to the part or sandy part, etc., the servo motor (13) is activated to pressurize and lower the pressure rod (21) to a pre-programmed pressing force and/or a pre-programmed lowering position. Then, the molding sand (S) in the areas where sand clogging is bad is compressed under pressure, resulting in the state shown in Fig. 4.

Next, the servo motor (13) reversely operates to raise and return the pressure rod 00 to its original position, and then the same operation as described above is performed in 1.
Two servo cylinders and servo motors (13), not shown, are operated according to pre-programmed values to sequentially pressurize the molding sand (S) in positions where sand clogging is poor.
It is compressed under pressure.

In this way, when all of the molding sand (8) in the positions where sand clogging is bad has been compressed, the moving tape tv (12) is opened (5) by the operation of two servo cylinders (not shown).
After moving the pressure rod (21) to the central position of lower it until it is inserted slightly).

Next, the two servo cylinders (not shown) move the pressure rod (21) in accordance with a preprogrammed order as shown in FIG.
Move the casting flask in the y direction to avoid clogging with sand (2), and the filling frame (3).
) is moved around the frame wall to make the upper surface of the sand concave as shown in Fig. 5, so that squeeze compression by the squeeze plate (4) around the frame wall can be effectively performed.

When the leveling of the foundry sand (S) is completed in this way, the servo motor (13) operates in reverse to raise and return the pressure rod (21), and then move the moving table (12) to the positions shown in Figs. Move it to the position shown in the figure.

Next, a cylinder (not shown) operates and the squeeze plate (4
) is lowered to pass through the opening (5) and squeeze and compress the molding sand (S) in the filling frame (3) to the vicinity of the mating surface of the casting flask (2) and filling frame (3), and the squeeze plate ( 4) After raising and returning the casting frame (3), remove the casting frame (2) and model plate (1).
), etc. to complete the mold.The mold is manufactured by repeating more than one operation.

In the embodiment described above, the pressure rod (21) is raised and lowered by raising and lowering the operating rod (19) via a servo motor (13), sprockets (14), (16), and an endless chain (17). However, a toothed belt may be used instead of the chain (17), and a lifting mechanism using a servo motor (13) and a pole screw, or a lifting mechanism using a pinion or a pinion rod rotated by a servo motor, etc. But that's fine.

In the embodiment M, there is a frame (6), and an opening (5).
However, the two parallel horizontal guide rods (8) (8) are connected at both ends by a connecting plate, and the horizontal slider (9) is connected to the horizontal guide rods (8) (8).
)(9) (hereinafter the same configuration as the embodiment) may be fitted.

In the above embodiment, the sand is raked before being squeezed and compressed by the squeeze plate (4), but it may be raked before being compressed by the pressure rod (21). However, depending on the mold, it may be better not to sand the mold at all.

The squeeze plate (4) in the above embodiment may be a segment squeeze foot, a stepped squeeze plate, a squeeze member on the side of the diaphragm member, etc.

Furthermore, in the example, the molding sand (S) was supplied by moving the pressure compression device to the side and opening the upper part of the filling frame (3), but the molding sand (S) was left open in the state shown in FIGS. 1 to 3. The foundry sand (S) may be supplied from (5).

Moreover, although the casting flask (3) is used in the embodiment, only a deep casting flask may be used. In this case, the mold is extracted from the flask after molding and used.

(Effects) As is clear from the above description, the present invention uses a pressurizing rod to locally pressurize and compress the foundry sand located in a position where sand clogging is bad, and then squeeze and compress the entire foundry sand. Because it is a pressurized compression device, it is possible to reliably uniformize the molding sand and pack the sand to create molds for various models that have areas that are poorly clogged with sand, and the effect of contributing to this industry is significant.

[Brief explanation of the drawing]

The drawings show an apparatus for carrying out the present invention, in which Fig. 1 is a vertical front view, Fig. 2 is a longitudinal side view, Fig. 3 is a view taken along arrow A-A in Fig. 1, and Fig. 4 is a pressurizing view. FIG. 5 is a vertical front view showing the sand leveling member lowered. (1): Model board (2): Casting frame (3): Filling frame (4): Squeeze plate (
6): Frame 07D=Movement table 03
): Servo controller 09) 2 Operating rod C
I): Pressure stick 1 figure 2 figure

Claims (1)

[Claims] A frame having an opening larger than the opening of the casting flask in the center is disposed above the model plate on which the casting flask is placed so that it can be moved in and out relatively or is fixed, and a moving table is placed above the frame in a horizontal plane. The moving table is supported with a controllable movement stop at any position, and the pressing force and/or pressure of the actuating rod is applied to the moving table.
Alternatively, a pressurized compression device is provided with an elevator whose descending position can be controlled, and a pressurizing rod is connected to the tip of the operating rod of the elevator, thereby making it possible to move the pressurizing rod into and out of the flask.