JPS58107251A - Molding device for mold - Google Patents

Abstract

PURPOSE:To detect the presence or absence of abnormality in a molding device accurately before the completion of molding of molds in a molding device which flows compressed air through the inside of the molding sand in the casting mold by providing a transducer for detection of pressure in a cover member in the opening part at the top end of a molding flask. CONSTITUTION:Compressed air is introduced into a cover member 9 by opening and closing of a valve 22 and is supplied to the top surface of the molding sand on a pattern plate 5, from which the air is passed successively through the sand and vent holes 4, 4 to increase the packing density of the sand, whereby a mold is molded. Here a pressure transducer 15 is provided in the wall part of the member 9, and the change in the pressure in the member 9 is detected continuously with said transducer. The result thereof is compared with the normal pressure stored in a device 18 and is operated with a device 16. If there is abnormality as a result of the operation, a stop command is transmitted by a control device 17 to the molding device to stop the molding device in emergency and to sound a buzzer.

Description

Detailed Description of the Invention The present invention involves filling molding sand into a molding flask on a model plate with a vent hole, supplying compressed air to the upper surface of the molding sand to flow through the molding sand, and thereby This invention relates to improvement of a device for molding a mold by increasing the packing density of sand.

As described above, a mold making device that increases the packing density of molding sand by flowing compressed air through the molding sand in the flask,
This molding device was invented in recent years and was filed for a patent by the same applicant as the present patent application, and is phase-separated. By the way, this molding device is based on the pressure of the compressed air supplied to the upper surface of the molding sand, the size of the container, and the vent hole of the model plate. The casting temperature depends on many factors, such as the degree of air-tightness between the model plate, the flask, and the cover that covers the four upper ends of the flask, and the suitability of the opening/closing valve of the compressed air introduction pipe. However, even if there is an abnormality, these factors cannot be seen before or during mold making, and can only be recognized by looking at the mold or casting. This is the current situation. Moreover, continuing molding even though there is an abnormality in the above factors,
There were problems such as a large number of defective molds being produced and production efficiency becoming extremely low.

The present invention was developed in view of the above-mentioned concerns, and the purpose is to provide a mold making apparatus that can accurately detect the presence or absence of abnormalities related to the many factors mentioned above. Hereinafter, one embodiment of the present invention will be described in detail based on the drawings.

(1) is a base having a horizontal surface (la) at the middle position, and an upward cylinder (2) is installed at the center of the horizontal surface (1a) of the base (1). Then, the cylinder (2
) is fixed to the upper end of the piston rod is a box-shaped lifting table (3) having an exhaust hole (3a) on one side, and the upper surface of the lifting table (3) is equipped with a vent with a vent plug that penetrates vertically. A model board (5) with holes (4) (4) is attached. Further, a gate-shaped frame (6) is attached to the upper end of the base (1).
) is provided with a flanged roller conveyor (7) oriented in the left-right direction and which pivotally supports a flanged roller (7a).

In addition, in the middle position of the concave frame (6), there is a roller frame (not shown) oriented in the left-right direction that pivotally supports a roller (not shown).
8) is installed, and the roller frame (8) is equipped with a cover member (9) capable of reciprocating from side to side. At the center of the ceiling wall of the cover member (9) is an F-oriented cylinder (
10) is attached, and an air supply hole (12) equipped with a conduit (11) is formed at one side of the ceiling wall of the cover member (9), and a squeeze hole is formed at the lower end of the piston rod of the cylinder (10). A plate (13) is fixed. In addition, a through hole (1
4) is bored, and the pressure transducer (14) is installed in the through hole (14).
5) is fitted.

Note that the pressure transducer (15) can continuously detect the pressure of the compressed air introduced into the cover member (9) and display the data digitally. The pressure state can be understood as a pressure change of 8 within a predetermined time (see FIGS. 3 to 6).

The pressure transducer (15), as shown in FIG. The arithmetic device (16) includes a control device (W (17)) that sends control commands to the molding device shown in FIG. (9) A storage device M (18) that stores data regarding the relationship between compressed air pressure and time; ) and are connected to each other.In addition, the cover member (9)
A filling frame (20) is hung and suspended below the plate, and the filling frame (20) is placed on the filling frame (21) on the model board (5), and the cover member (9) is attached. The cover is moved laterally and separated from the settling cover member (9). (22)
is an on-off valve fixed to the ceiling position of the recessed frame (6), one end of which is connected to the compressed air source through the 4th pipe (23), and the other end is connected to the 41st pipe (11) through the 4th pipe (24). ) so that it can be engaged and communicated with.

(25), (2(i) is the cover part (9), the filling frame (20
) is a sealing member buried downward.

With this structure, an empty filling frame (21) is placed 1d above the model plate (5) via a roller feeder (7) with a flange, and the cylinder (2) is moved in parallel with the extension operation of the cylinder (2). The lifting table (3), model plate (5), etc. are raised, and the casting flask (2]) is placed on the model plate (5), and the filling frame 4- is placed on the casting flask (21).
- (20) respectively mat, model plate (5) and casting flask (21
) etc. to form a space -i BIij, move the cover member (9) from a position directly above the filling frame (20), fill the space with molding sand, and then remove the cover member (9) again. Serving frame (20
), and the silicator (2) is further extended to raise the flask (21), lifting table (3), etc., and the cover member (9) to be airtight above the molding sand. The conduits (11) and (24) are brought into contact with each other to communicate with each other, and the compressed air is transferred into the cover member (9) by opening and closing the on-off valve (22). is supplied to the upper surface of the molding sand, and the molding sand passes through the vent holes (4) (4) in order to increase the degree of filling of the molding sand, and the squeeze plate (13) is lowered by the extension operation of the cylinder (10). The molding sand with increased packing density is compressed, and after the compression of the molding sand is finished, the squeeze plate (13) is raised by the shortening operation of the cylinder (lO), and the model plate (5) is raised by the shortening operation of the cylinder (2). , the flask (21) etc. is lowered (
21) is placed on the flanged rollers (7a) (7m), die-cutting is performed, and the above operations are repeated to continuously form the ma, which is the same as in the conventional molding method.

By the way, in such a molding process, for example, on the premise that compressed air with a pressure of 6'%1 is supplied to the cover member (9), the pressure of the compressed air is plotted on the vertical axis (X axis), and the pressure of the compressed air is plotted on the horizontal axis (Y axis).
d by the throughflow of compressed air
When the pressure change of the compressed air related to the filling density of 4 & l is displayed on a graph, it will be as shown in Figure L1js3 when it is normal, but if there is an abnormality in the lid when the on-off valve (22) is activated, the 4th As shown in Figure 1, if the supply time of compressed air becomes short or there is an abnormality in the pressure of the compressed air source, the
As shown in Figure 1, if the compressed air pressure is low (and there is an abnormality in the opening of the vent hole (4)), as shown in Figure 6,
Each graph shows characteristic changes, such as the time for complete exhaust becoming longer. Therefore, the pressure change of the compressed air introduced into the cover member (9) is continuously detected by the pressure transducer (15), and the result of this pressure change is detected by the device i described in 11 above.
t (18) and is calculated by the calculation device 11 (16), and as a result, 47ii
; If so, a stop command is issued to the molding device via the control device (17) to bring the molding device to an emergency stop, and a buzzer sounds to notify the operator of this, and at the same time, the display 2 i1! (19) Indicate the location of the difference'/1 with a drawing, symbol, or text. Made by JI! :? 1 looks at the display device (19), confirms the location of the abnormality, and begins repair work.

In the above embodiment, the pressure transducer (15) detects the pressure change of the compressed air placed in the cover member (9), and the arithmetic unit (16) detects the pressure change from the pressure transducer (15). The detection result is compared with the normal pressure change to determine the abnormality and the location of the abnormality, and the display device 1ffi (19) displays the abnormal location in drawings or text, but the calculation device (16) ) only determines that there is an abnormality and issues an abnormal signal, and when F-1 is disconnected at the abnormal location, the pressure change of the compressed air at that time is plotted in graphs as shown in Figures 3 to 6. The pressure change may be displayed on a display device and the pressure change may be read by the operator, or a pressure transducer (
15) The detection results of 15) are simply displayed in the form of graphs as shown in Figures 3 to 6, and the operator reads the graphs one by one.
1. V may be 1ψ, and both the presence of an abnormality J6 and the location of the abnormality may be determined by 1. In short, the device (reactor) that starts operating according to the command from the control device (17) can be considered to be of any type, and any one can be selected −I+jO, and the reactor d is a pressure transducer and a control device. It suffices if it is electrically connected to device f and has a configuration of l.

As is clear from the above description, in Book 9 and Akira, a pressure transducer is attached to the wall of the cover member, and the transducer continuously converts the pressure of air introduced into the cover member. By comparing this detection result with known data, it is possible to easily and reliably recognize that there is an abnormality in the molding equipment and the location of the abnormality without completing mold manufacturing. Become. Moreover, it has excellent effects such as being able to detect abnormalities in multiple cheeks with one detector.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a partially cutaway front view, FIG. 2 is a block diagram of a device that controls the operation of the device d of the present invention, and s3 to s5 are views inside the cover member. (4): Vent hole (5): Model plate (9): Cover part (i5): Pressure transducer (16): Computing device t (1g): Origin device (22): Open/close valve (24): Chronic Fig. 3 Fig. 5 Fig. 6 / 1.4 t, 8 2.2?, 6 3
3.4sl, Incident Indication 1982 Patent Application No. 207
598 No. 2, Title of the invention: Mold making device 3, Relationship with the case of the person making the amendment Patent applicant address: Jurisdiction) 4-7-23 Meieki, Nakamura-ku, Nagoya, Aichi Prefecture
No. Toyota Building Name (Name) Shinto Kogyo Co., Ltd. Representative Nagai 1'

Claims (1)

[Claims] A large number of vent holes (4) with vent plugs are drilled, and the model plate (5) with which the vent holes (4) with vent plugs are installed can be raised and lowered.
5) so that people can access it, and an on-off valve (
22) a conduit (24) communicating with the source of compressed air through the
A mold making device comprising: a cover member (9) capable of communicating and engaging with the cover member (9);
A pressure transducer (15) that continuously detects the pressure of compressed air introduced into the cover member (9) is attached to the wall of the cover member (9), and a control device (17) is attached to the pressure transducer (15). A mold making device characterized in that it is connected to a reaction device that is started by a command.