JPH0437440A - Pressurizing compression apparatus - Google Patents

Abstract

PURPOSE:To almost uniformly compress the whole range in a flask and to make a mold having good sand packing by beforehand locally pressurizing the molding sand at position, where insufficient sand packing is executed in the flask, with a pressurizing rod to make sufficient sand packing. CONSTITUTION:After shifting the pressurizing rod 16 at upper part of position corresponding to pocket part or sand packing part, where is insufficient sand packing, by rotation-driving a first servo motor 8 and a second servo motor 12 at pre-programed angle, the molding sand S at the position, where insufficient sand packing is performed, is pressurize-compressed by descending the pressurizing rod 16 with pre-programed pressurizing force and/or to pre-programed descending position under working the pressurizing cylinder 14. Successively, after ascending and returning back the pressurizing rod 16 to the original position by reversely working the pressurizing cylinder 14, the first and the second servo motors 8, 12 are worked as the same way as the above working according to the pre-programed order, and the molding sand S at the position, where insufficient sand packing is performed, is pressureize-compressed in order with the pressurizing rod 16.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention is a method for preparing molding sand in areas where sand is not easily clogged, such as a narrow sanded area between a model and a frame wall or a long and narrow pocket provided in a model. The present invention relates to a pressurizing and compression device that performs compression.

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

However, when making a mold by compressing it only with a squeeze plate, the narrow sanded part between the model and the frame wall or the elongated pocket part provided in the model should have a simple shape that prevents sand from clogging. I could only mold it.

Therefore, instead of the conventional squeeze board, we used Segmen!・Sand clogging is improved by compressing the molding sand with a squeeze foot. However, in the case of squeezing with a segment foot, the segment foot is placed in correspondence with the low cup between the flasks, so it is easier to eliminate sand clogging in areas with poor sand clogging. The sand around the area has become compacted to some extent, and squeeze hooks are placed to correspond to the areas where sand is poorly clogged due to the compacted sand.]・
There was a problem that the movement of the part was obstructed and it was not possible to tighten that part sufficiently.

Furthermore, since the position of the squeeze foot is fixed relative to the model, there is a problem in that it is not possible to apply pressure to the optimum position for each model.

(Purpose) The present invention was made in view of the above problems, and an object of the present invention is to provide a pressure compression device for molding molds by reliably filling sand in areas where sand clogging has been difficult in the past. do.

(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 first arm extending in the horizontal direction is rotatably supported on the foundation so as to be able to stop rotating at any angle, and one end of a second arm extending horizontally at the other end of the first arm can be controlled to stop rotating at any angle. An elevator is provided at the other end of the second arm in which the pressing force and/or lowering position of the operating rod can be controlled, and a pressurizing rod is connected to the tip of the operating rod of the elevator. It is characterized by this.

(Function) By adopting the above-mentioned solution, the molding sand in the areas where sand clogging is bad in the frame is locally pressurized by the pressurizing rod in advance to create sufficient sand clogging. The entire area inside the frame is compressed almost uniformly by squeezing with a squeeze member performed in the process, and a mold with good sand clogging is formed.

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

A model plate (1) is placed on the foundation (F), and a casting frame (2) and a filling frame (3) are placed on top of the model plate (1) using guide pins (not shown) to prevent them from shifting. It is placed there. A squeeze plate (4) that is movable up and down by a cylinder or the like (not shown) is arranged above the filling frame (3) of the casting flask (2), and the squeeze plate (4) is arranged above the filling frame (3) of the casting flask (2). A pressure compression device (P) is disposed at an outer position of the frame (2) and filling frame (3).

Now, to explain the pressure compression device (P), the basics (F
), a first vertical shaft (6) is fixed via a frame (5), and one end of a first arm (7) extending in the horizontal direction is rotatably attached to the first vertical shaft (6). possible to be pivoted.

Further, the first vertical shaft (6) is connected to a rotating shaft (9) of a first servo motor (8) provided on the upper part of the first arm (7) to rotate the first arm (7) at an arbitrary angle. It is configured so that it can be stopped by

A second vertical shaft (10) is fixed to the other end of the first arm (7), and one end of a second arm (11) extending in the horizontal direction is rotatable on the second vertical shaft (10). The second vertical shaft (10) is a rotating shaft (13) of a second surf motor (12) provided on the upper part of the second arm (11).
It is configured such that the second arm (11) can be rotated at any angle and stopped.

A pressurizing cylinder (14) whose pressurizing force and/or descending position can be controlled is attached downward to the other end of the second arm (11), and the piston rod (15) of the pressurizing cylinder (14) ) A pressure rod (16) is integrally fixed to the tip.

In addition, the pressure rod (16) is in the uppermost position as shown in Fig. 1.
2), located slightly above the filling frame (3), and the third
As shown in the figure, it is provided to be inserted into the flask (2).

In the case of the configuration shown in Fig. 2, the second surf motor (12) is operated in the state shown in Figs.
1)' via the second vertical shaft (10), and the pressure rod (
16) to the position of point (T) in Fig. 2, a sand supply device (not shown) is moved above the filling frame (3), and the molding sand (S) is poured onto the model plate (1) and the casting frame. (2), fill frame (
3) Supply a fixed amount to the space defined in step 3). The amount of molding sand (S) supplied at this time is such that the stones are below the top surface of the filling frame (3), so that it does not overflow from the top of the filling frame (3) and spilling outside.

Next, the sand supply device (not shown) is installed in the casting flask (2) and filling frame (3).
At the same time, the second surf motor (12) of the pressure compression device (P) is operated in reverse to return the pressure rod (16) to the position shown in FIGS. 1 and 2.

Next, the first surf motor (8) and the second surf motor (
12) rotates at a pre-programmed angle to move the pressure rod (16) upward to a position corresponding to a pocket portion or sanded portion that is poorly clogged with sand, and then the pressure cylinder (14)
) is activated to pressurize and lower the pressurizing rod (16) to a preprogrammed pressurizing force and/or a preprogrammed lowering position to pressurize and compress the molding sand (S) in the position where sand clogging is bad, The state shown in Figure 3 will be reached.

Next, the pressure cylinder (14) is operated in reverse and the pressure rod (14) is operated in reverse.
After raising and returning the molding sand (6) to its original position, the first and second servo motors (8) and (12) are operated according to the pre-programmed order in the same way as the operation described above, and the molding sand ( S) is sequentially pressurized and compressed using a pressure rod (■6).

When all the molding sand (S) in the positions where sand clogging is bad is compressed under pressure in this way, the first and second servo motors (8)
(12) is activated to rotate the first and second arms (7) and (11) and move the pressure rod (16) above the central position of the filling frame (3). ) to lower the pressure rod (16) to a pre-programmed lowering position (a position where the lower end of the pressure rod (16) is slightly inserted into the molding sand (S)).

The eleventh and second servo motors (8) and (12) are then actuated according to a pre-programmed order to control the first and second servo motors.
By rotationally moving the arms (7) and (11), the pressurizing rod (16) is rotated and moved to remove the casting flask (which is less likely to be clogged with sand).
2) Move the molding sand (S) around the frame wall of the filling frame (3) and make the upper surface of the sand concave as shown in Figure 4 to effectively perform squeeze compression using the squeeze plate (4) around the frame wall. Stir the sand as if it were being washed away.

When the molding sand (S) has been raked in this way, the pressure cylinder (14) operates in reverse to return the pressure rod (16) upward, and then the first and second servo motors (8) (12 ) is operated to move the pressure rod (16) to the position of point (T) in FIG.

Next, a cylinder (not shown) operates and squeezes the squeeze plate (4).
is lowered to transfer the molding sand (S) in the filling frame (3) to the casting frame (2).
After squeezing and compressing the area near the mating surface of the molding frame (3) and lifting the squeeze plate (4) back up, removing the molding frame (3) and molding the molding flask (2) and model plate (1). Perform punching etc. to complete the mold. The above operations are repeated to form a mold.

In the above embodiment, the squeeze plate (4) was used to squeeze out the foundry sand (S
) before squeezing and compressing the sand with the pressure rod (16), or it may be done before compressing with the pressure rod (16). You may also choose not to perform raking.

The same effects can be obtained even if the squeeze plate (4) in the above embodiment is replaced by another squeeze member such as a segment squeeze foot, a stepped squeeze plate, or a diaphragm member.

Further, in the embodiment, a filling flask (3) is used, or only a deep flask may be used. In this case, the mold is removed from the flask after molding and used.

(Effects) As is clear from the above description, the present invention can locally pressurize and compress molding sand in positions where sand clogging is bad, and can be used in combination with a squeeze device for squeezing and compacting various models. On the other hand, it has become possible to make molds by reliably making the foundry sand uniform and filling it with sand, which has a significant effect on this industry.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and Fig. 1 is a partially longitudinal front view showing the state before pressurization, Fig. 2 is a view taken along arrow A-A in Fig. 1, and Fig. 3 is FIG. 4 is a partially longitudinal front view showing the pressurized and compressed state, and FIG. 4 is a partially longitudinal front view showing the sand leveling state. (6): 1st vertical axis (7): 1st arm (8): 1st surf motor (10): 2nd vertical axis (11): 2nd arm (12)/2nd surf motor (14): Pressure Cylinder (16): Pressure rod (F): Foundation (S): Casting sand Roni ====Connection diagram ear 1 threshold

Claims (1)

[Claims] A first arm extending in the horizontal direction is pivoted on the foundation so that it can be controlled to stop rotating at any angle, and at the other end of the first arm, one end of a second arm extending in the horizontal direction can be controlled to stop rotating at any angle. A lift is provided at the other end of the second arm, and a pressurizing rod is connected to the tip of the actuating rod of the lift. A pressure compression device characterized by: