JPH06344315A - Pressure cast molding method - Google Patents

Abstract

PURPOSE:To efficiently dehydrate a molded object by attaching a suction pipe having sponge attached to the leading end thereof to the arm of a working robot and sucking up the water accumulated in a container-shaped molded object by the suction pipe moving according to a predetermined pattern. CONSTITUTION:A suction pipe 14 having sponge 16 provided to the leading end thereof is attached to the leading end of the articulated arm 12 of a working robot 10. A suction hose 18 is connected to the rear end of the suction pipe 14 and the water accumulated in the container-shaped molded object demolded from a pressure cast molding machine is sucked up through the suction pipe 14. At this time, the position of the molded object is accurately detected by a CCD camera to scan the entire area of the bottom surface of the molded object and the suction pipe 14 is moved according to a predetermined pattern to dehydrate the molded object. After the sponge 16 is immersed in a washing water tank, it is pressed to a net to squeeze out water from the sponge 16. Therefore, the water on the bottom surface of the molded object is sufficiently removed and the cracking of the molded object during a drying process is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure casting method for forming a green body of ceramics, and more particularly to a method for removing water from the body.

[0002]

2. Description of the Related Art In the pressure casting method, sludge is pressurized and injected into a casting space surrounded by a water-absorbing molding die, and a drainage channel in the molding die is depressurized to be absorbed by the molding die. Drained moisture out of the mold. After a sufficient amount of the base material has adhered to the inner surface of the molding die (that is, has been inlaid), the mold is removed. In order to perform this demolding, air pressure is applied to the drainage channel of the mold so that the water in the mold exudes to the inner surface of the mold, and a thin water film is formed between the carcass (green body compact) and the mold. Formed at the interface of.

When the lower mold is separated and the pallet is arranged slightly below the upper mold and air pressure is applied to the upper mold to form a water film on the inner surface of the mold, the molded product is separated from the upper mold and the pallet is separated. Fall on top.

The green body formed on the pallet is
If necessary, finishing treatments such as deburring, boring, wiping the surface, and fine adjustment of the shape are carried out, and then sent to the drying step.

[0005]

When a container-shaped molded body such as a tank is molded by the pressure casting method, the water film generated on the inner surface of the molding die at the time of demolding is accumulated in the molded molded body. easy. If this water remains, cracks will occur in the green body during the drying of the green body.

As a countermeasure against this, conventionally, an operator wipes the inside of the molded body, but the working efficiency is low.

[0007]

According to a first aspect of the present invention, there is provided a sponge at the tip of water accumulated in a container-shaped molded product which is demolded from a pressure cast molding machine. ,
It is characterized in that the work robot sucks it by a suction tube which moves in a predetermined pattern.

According to a second aspect of the pressure cast molding method, the water accumulated inside the container-shaped molded product demolded from the pressure cast molding machine is moved in a predetermined pattern by an arm of a working robot. It is characterized in that it is sucked up by a sponge provided at the tip.

According to a third aspect of the pressure casting method of the present invention, in the second aspect, after absorbing water in one molded body,
It is characterized in that the sponge is immersed in water in a washing water tank, and then the sponge is pulled out of the water and pressed against a net or a perforated plate for dehydration.

According to the pressure cast molding method of claim 4, most of the water in the molded body is sucked out by the method of claim 1, and then the remaining water is sucked by the method of claim 2 or 3. It is characterized by.

[0011]

According to the pressure cast molding method of the first aspect, even if a large amount of water is accumulated in the container-shaped molded body, it can be efficiently sucked out by the work robot.

According to the pressure cast molding method of the second aspect, water in the container-shaped molded body can be efficiently absorbed by the working robot.

According to the pressure cast molding method of the third aspect, the sponge is always clean and the water in the molded body can be sufficiently absorbed.

According to the pressure cast molding method of the fourth aspect, even if a large amount of water is accumulated in the container-shaped molded body, it can be efficiently removed by sucking and sucking.

[0015]

Embodiments will be described below with reference to the drawings. FIG. 1 is a side view of a work robot used in a pressure casting method according to an embodiment of the present invention. FIG. 2 is a cross-sectional view illustrating a method for sucking and discharging water using this work robot.

In FIG. 1, a suction tube 14 is held at the tip of the articulated arm 12 of the work robot 10, and a sponge 16 is attached to the tip of the suction tube 14. As shown in FIG. 2, in this embodiment, this suction tube 1
The sponge 16 is attached to the tip of the suction tube 14 by inserting the sponge 16 into the tip of the suction tube 14. Suction tube 1
A suction hose 18 is connected to the rear end of No. 4.

The water W accumulated in the container-shaped molded body (low tank in this embodiment) 20 that has been demolded from the pressure casting molding machine is sucked out by the suction pipe 14. Since the sponge 16 is provided, the water W in the molded body 20 can be sufficiently sucked out even if the suction pipe 14 does not directly contact the molded body 20.

The formed body 20 is placed on the pallet 22, and the formed body 20 on the pallet 22 is placed on the pallet 22.
The position of is accurately detected by, for example, a CCD camera,
The suction pipe 14 is scanned over the entire bottom surface of the molded body 20 so that the water W can be sufficiently sucked out. It should be noted that the water may be sucked out only from a portion where water is likely to collect (for example, a corner portion), instead of the entire bottom surface.

In this embodiment, a control device (not shown) for processing information from the CCD camera has a function of identifying the shape of the molded body 20, and the shape of the molded body 20 and the molded body 20. The suction pipe 14 is moved according to a predetermined pattern according to the position of, and water is sucked out from the bottom surface 20a of the molded body 20.

FIG. 3 is a side view for explaining another embodiment method of the present invention. A clip-shaped clamp 26 is provided at the tip of an arm 24 of the work robot, and a sponge 28 is sandwiched by the clamp 26. The arm 24 is moved in a predetermined pattern according to the position and shape of the molded body (not shown in FIG. 3) to suck up the water accumulated on the bottom surface of the molded body.

By thoroughly wiping the entire bottom surface of the molded body (particularly the corner portion of the bottom surface) with the sponge 28,
The water accumulated on the bottom surface of the molded body is sufficiently removed. As a result, even if this molded product is sent to the drying step, the occurrence of cracks and the like is eliminated.

In the case of absorbing water as shown in FIG. 3, the sponge 28 is pressed against the inner surface of the molded body,
The fine particles on the inner surface of the green body molded body are adsorbed on. Therefore, in this embodiment, the sponge 28 is immersed in the cleaning water tank 30 shown in FIG. That is, after sucking one molded body, the arm 24 puts the sponge 28 into the water tank 30.
It is dipped in the open water surface 32 of. The arm 24 is then
The sponge 28 is pulled up from the water surface 32, pressed against the net 34, and the sponge 28 is squeezed. This allows sponge 2
The fine particles adhering to No. 8 are removed, and water can be sufficiently sucked at the next sucking operation. Aquarium 3 in Figure 4
Although 0 has a net 34, it is obvious that a perforated plate may be used instead of the net 34. Alternatively, as shown by an arrow A in FIG. 5, the sponge 28 may be pressed against the perforated plate or the net 36 and then pressed downward to squeeze.

In the present invention, the work robot 10 shown in FIG. 1 is used to suck out most of the water W from the inside of the molded body 20, and then the very small amount of water remaining according to the method shown in FIGS. 3 and 4. It is preferable to suck up. By doing so, even if a large amount of water is accumulated in the molded body 20, this water can be efficiently removed.

Since the sponges 16 and 28 described above are consumable items, they can be replaced appropriately. Further, in the above embodiment, the position and shape of the molded body 20 are identified by the CCD camera, but in order to improve the recognition accuracy of this CCD camera, the work space is surrounded by a curtain or the like to prevent the entry of ambient light. Is preferred.

[0025]

As described above, according to the pressure casting method of the present invention, water accumulated inside the molded body can be removed very efficiently.

[Brief description of drawings]

FIG. 1 is a side view illustrating an example method.

FIG. 2 is a cross-sectional view of a main part for explaining a method according to an embodiment.

FIG. 3 is an enlarged view of a main part for explaining another embodiment method.

FIG. 4 is a vertical cross-sectional view showing a cleaning water tank used in the method of the embodiment.

FIG. 5 is a side view showing how to squeeze a sponge.

[Explanation of symbols]

 10 Working Robot 12 Arm 14 Suction Tube 16 Sponge 18 Hose 20 Molded Body 28 Sponge 30 Water Tank

Claims (4)

[Claims] 1. A suction pipe provided with a sponge at a tip thereof for moving water accumulated inside a container-shaped molded product demolded from a pressure casting molding machine and moved in a predetermined pattern by a work robot. The pressure casting method is characterized in that it is sucked out. 2. The sponge provided at the tip of the arm of the working robot that moves in a predetermined pattern absorbs the water accumulated inside the container-shaped molded product that has been demolded from the pressure casting molding machine. The pressure casting method characterized in that 3. The method according to claim 2, wherein after absorbing water in one molded body, the sponge is immersed in water in a cleaning water tank, and then the sponge is pulled up from the water.
A pressure cast molding method characterized by pressing against a net or a perforated plate for dehydration. 4. A method of pressure casting according to claim 1, wherein most of the water in the molded body is sucked out, and then the remaining water is sucked out by the method of claim 2 or 3. .