JPH02205229A - Casting apparatus - Google Patents

Abstract

PURPOSE:To convey a casting product at good accuracy to following process by forming the recessed part on upper face of a molding board and making this recessed part a part of the runner. CONSTITUTION:A flask is laid on the molding board 1 and molding sand is packed in the flask and a mold is formed to form casting device. Then, a protruding part 4 projecting upward on upper face of the molding board 1 is integrally formed and the recessed part 3 is formed on this upper face. This recessed part 3 is made a part of the runner in the mold. By this method, relative displacement between the casting and the molding board can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a casting device suitable for automatically taking out a cast product using a picking device such as a robot hand or a manipulator.

(Prior art) A cast product needs to be held in a mold for a certain period of time and cooled in the mold, but on the other hand, in the casting process, the flask after casting must be recovered as soon as possible and reused. For example, in Japanese Patent Application Laid-Open No. 18269/1983, a method for automatically removing a casting product from a mold in order to make it available for use is proposed. The upper mold is pressed and held by a holding member, and the flask on the outer periphery of the upper mold is lifted together with the main mold sand of the upper mold to separate the upper mold from the lower mold so that the upper part of the casting is exposed on the upper part of the lower mold. A method for taking out a casting is disclosed, which is characterized in that the casting is taken out from the lower mold with the core housed therein by gripping the mold.

(Problem B to be solved by the invention) However, the casting device used in the method for taking out the castings described above places the upper frame and the lower frame on a surface plate, and the inside of these upper and lower frames is The mold is formed by filling it with casting sand,
Since the upper frame and the lower frame are only placed on the surface plate, the casting tends to move with the upper frame and the lower frame relative to the surface plate during transportation, and the stirrup position is not constant. For this reason, even if an attempt is made to clamp the area around the sprue of a cast metal using a robot hand, etc., the robot, etc., will not be able to clamp the area around the sprue of the cast metal due to the fact that it is difficult to use visual sensors, etc. in a work environment where steam, heat, etc. are generated. Since it is only possible to clamp something in that position, it may not be possible to clamp it. Further, when clamping, it is necessary to remove the casting sand around the sprue, but as mentioned above, since the position of the sprue is not constant, it may not be possible to properly remove the sand for the same reason. Therefore, it is difficult to automatically take out the casting from the mold.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a casting apparatus that can reliably automatically take out castings.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the casting apparatus of the present invention includes a surface plate, a flask placed on the surface plate, and a mold filled with the flask. In a casting apparatus having a casting flask and casting sand for forming a mold, a recess is formed in the upper surface of the surface plate, and the recess is made a part of the runner of the mold.

(Function) In the casting apparatus of the present invention having such a configuration, the molten metal injected from the sprue of the sand mold in the flask flows into the cavity in the sand mold through the runner and solidifies. At this time, the molten metal in the runner also solidifies, but since the recess formed on the top surface of the surface plate forms part of the runner, some of the molten metal solidified in the runner is inside the recess of the surface plate. It solidifies in the state where it enters. For this reason, the molten metal solidified in the recess of the surface plate engages with this recess, preventing relative displacement between the casting and the surface plate, and the position of the sprue relative to the surface plate during transport of the casting. It never shifts. Therefore, even if the robot can only clamp objects at predetermined positions, it is possible to clamp the area around the sprue with its robot hand or the like and automatically take out the casting reliably.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 to FIG. 3 each show an embodiment of the surface plate constituting the casting apparatus of the present invention, and the surface plate 1 of each embodiment is
A feature is that a recess 3 forming a sprue bottom is formed on the upper surface of the surface plate body 2.

In the surface plate 1 shown in FIG. 1, a projection 4 projecting upward is integrally formed on the upper surface of the surface plate 1, and a recess 3 is formed on the upper surface of this projection 4.
A cylindrical heat insulating material 5 is cast inside the protrusion 4 so as to surround the recess 3. The heat insulating material 5 is attached to the recess 3 that forms the bottom of the sprue when molten metal flows into the recess 3.
This is to prevent the surface plate 1 from deforming due to thermal expansion.

The feature of the surface plate 1 shown in FIG. 2 is that the heat insulating material 5 has a cup-like shape. The recess 3 is located within the opening of this cup-shaped insulation 5. The rest of the structure is the same as the embodiment shown in FIG.

The feature of the surface plate 1 shown in FIG. 3 is that a protrusion 4 protruding from the upper surface of the surface plate 1 is fitted into the surface plate main body 2, and a heat insulating material 5 is interposed between the protrusion 4 and the surface plate main body 2. The point is that I let it happen. The recess 3 is formed on the upper surface of the projection 4.

Next, the configuration of a casting apparatus according to an embodiment of the present invention will be explained with reference to FIGS. 4 to 12, and at the same time, the process of manufacturing a casting using this casting apparatus will be explained.

FIG. 4 shows the surface plate 1 shown in FIG.
．． ... It shows the state where it is placed on top.

Next, the surface plate l is conveyed by rollers 6 from the position shown in FIG. 4 to the position shown in FIG.
is set. The lower mold 7 is formed of casting sand 9 filled in a lower frame 8.

In the figure, 10 is a hanger for setting the lower frame 8 on the surface plate l. When the setting of the lower frame 8 is completed, the surface plate 1 is conveyed on the rollers 6 from the position shown in FIG. 5 to the position shown in FIG. 6, and at the position shown in FIG.
is set. The L frame 11 is filled with casting sand 9 to form an upper mold 12. Therefore, when the setting of the upper frame 11 is completed and the upper mold 12 and the lower mold 7 are combined, the mold 13 is completed.
A runner 16 is formed. A recess 3 of a surface plate is located at the bottom of the sprue 15 so as to communicate with the runner 16.

Next, the surface plate l is conveyed on the rollers 6 to the position shown in FIG. 7, and the weight 17 is set on the mold 13 by the hanger 10. Zero weight 1 with an opening 1B for pouring molten metal formed at the position
7 is for preventing the upper mold 12 and lower mold 7 from separating when pouring into the mold 13. When the setting of the zero weight 17 is completed, the surface plate l is conveyed to the position shown in FIG. Mold 1
Molten metal is poured from sprue 15 of No. 3, and casting is performed. At this time, the molten metal 19 fills the runner 16, the cavity 14, and the recess 3 located at the bottom of the sprue 15. When the casting is completed, the mold 14 is left as it is for a while until the molten metal solidifies.

When the molten metal poured into the mold 13 solidifies, the surface plate 1 is transported to the position shown in FIG. 9, and the weight 17 is removed by the hanger 10 here.

When the removal of the weight 17 is completed, the surface plate 1 is conveyed on the rollers 6 to the position shown in FIG. 1O, and the upper frame 11 and the lower frame 8 are removed. This removal work is performed by first pressing at least the sprue 15 of the mold 13 with the mold holder 20, and then engaging the hanger 10 with the lower frame 8 and pulling out the lower frame 8 and the upper frame 11 upward.

Then, when the removal of the lower frame 8 and upper frame 11 is completed,
The mold holder 20 is retracted upward, and the mold 13 is transported to the position shown in FIG. Here, the scraping member 21 moves the upper y! The casting sand 9 forming the mold 112 is scraped out, and the sprue 15 of the solidified cast product 22 is exposed from the mold 13. The mold 13 with the sprue 15 exposed is conveyed with a fixed fit over the rollers 6 to the position shown in FIG. 12, where the cast product 2
Clamp the sprue 15 of No. 2 with a robot hand or manipulator 23, and place the cast product 22 into the mold 13 and the fixed I.
Separate from M1.

As is clear from the above explanation, in the above casting apparatus,
In the process shown in FIG. 8, the molten metal injected from the sprue 15 of the mold 13 flows through the runner 16 into the cavity 14 in the sand mold of the mold 13 and solidifies. At this time, the molten metal in the runner 16 also solidifies, but since the recess 3 formed on the upper surface of the surface plate 1 constitutes a part of the runner 16, part of the molten metal solidified in the runner 16 solidifies. The portion has entered the recess 3 of the surface plate 1 and is solidified. °For this reason, the molten metal solidified in the recess 3 of the surface plate 1 engages with this recess 3 and prevents relative displacement between the cast product 22 and the surface plate 1, and during conveyance by the rollers 6. sprue 1
The position of sprue 5 does not shift with respect to the surface plate l. Therefore, in the process shown in Fig. 12, the sprue 1 is
By clamping the periphery of 5, the cast product 22 can be reliably and automatically taken out.

(Effects of the Invention) As described above, according to the casting apparatus of the present invention, relative displacement between the casting and the surface plate can be prevented, so that the casting can be reliably and automatically removed from the mold. Therefore, the cast product can be transported to the subsequent process with high precision.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view showing a surface plate according to one embodiment of the present invention, FIG. 2 is a vertical cross-sectional view showing a surface plate according to another embodiment of the present invention, and FIG. 3 is a longitudinal cross-sectional view showing a surface plate according to another embodiment of the present invention. FIG. FIG. 4 to FIG. 12 are longitudinal cross-sectional views showing the steps of manufacturing a cast product using the casting apparatus of the present invention. l: Surface plate 3: Recess 7: Lower mold 12: Upper mold 13: Mold 16: Runway

Claims (1)

[Claims] (1) A casting apparatus having a surface plate, a flask placed on the surface plate, and casting sand filled in the flask to form a mold in the flask, wherein: A casting device, characterized in that a recess is formed in the upper surface, and the recess is a part of a runner of the mold.