JPS6239057B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for solidifying molten metal at a sprue in mold casting.

In general, in mold casting for cast iron, the molten metal is removed as soon as it begins to solidify after pouring in order to prevent cracking of the cast product or damage to the mold due to solidification shrinkage. At that time, the large-capacity sprue part had not yet solidified, so there were problems such as molten metal splattering from this part as a pool and adhering to surrounding equipment, causing damage or burnout.

The present invention has been made in view of these problems, and provides an apparatus for forcibly solidifying molten metal at the sprue by inserting a graphite-coated cooling metal into the unsolidified sprue. The purpose is to

The configuration of the present invention will be explained below based on examples.

Reference numeral 1 denotes a pair of mating molds consisting of a left mold 2 and a right mold 2a, and a cavity 3 of the mating mold 1 is filled with molten metal 4. Reference numeral 5 denotes an extrusion pin whose base end is fixed to the extrusion plate 6, and whose tip end slidably passes through the left mold 2 and projects onto the cavity surface. Reference numeral 7 denotes a rotating frame whose one end is rotatably supported by a pin 8. A cylinder 9 is fixed diagonally downward on the upper surface of the rotating frame 7, and a piston rod 9a has a cooling cylinder at its tip. A metal 10 is fixed to the sprue 10 so that it can be inserted into the sprue 3a.

Reference numeral 11 denotes a rotating cylinder whose rear end is rotatably supported by a pin 12. The other end of the rotating frame 7 is rotatably connected to the tip of the piston rod 11a, and is rotated by the operation of the cylinder 11. It is becoming more and more popular. 12 is a container in which graphite coating solution 13 is stored.

Next, the operation of the device configured as described above will be explained.

After pouring the molten metal 4 into the cavity 3 of the combined mold 1 consisting of the left mold 2 and the right mold 2a, the cylinder 9 was pushed out and immersed in a graphite coating solution 13 to prevent the molten metal from welding. The cooling metal 10 is inserted into the sprue part 3a to cool the molten metal 4 in the sprue part 3a.
When it starts to solidify, the cylinder 9 is operated in reverse to pull out the chilled metal 10 from the sprue 3a, and at the same time, the opening/closing cylinder (not shown) is activated to move the mating mold 1 from side to side. Then, the ejector pin 5 is operated to extrude, and the cast product adhering to the left mold 2 is peeled off from the left mold 2 and taken out downward. Meanwhile, during this taking-out operation, the rotating cylinder 11 is retracted. It operates to rotate the rotating frame 7 about the pin 8 as a fulcrum,
A cylinder 9 with a chiller 10 fixed to the tip of a piston rod 9a is connected to a container 1 in which a graphite coating solution 13 is stored.
2, and then the cylinder 9 is continuously pushed out and the piston rod 9a is moved upward.
The chiller 10 at the tip is immersed in the graphite coating solution 13, and then the cylinder 9 is operated in reverse to retract the chiller 10 at the tip of the piston rod 9a above the container 12, and the cylinder 11 is pushed out and aligned. Move it directly above the mold 1, and repeat the above operation.

In short, in the present invention, a graphite-coated cooling metal is inserted into the molten metal at the sprue, and the molten metal is forcibly solidified. The graphite-coated cold metal does not adhere to the metal and damage or burn out the equipment, and the graphite-coated cold metal does not adhere to molten metal and can be used many times, demonstrating excellent effects. However, the effects on this type of industry are significant.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway sectional view showing an embodiment of the present invention. 4...molten metal, 10...chilled metal.

Claims (1)

[Claims] 1. A storage container 12 for graphite coating solution disposed above the sprue 3a of the combined mold 1 and outside the mold 1.
A downward cylinder 9 that can be rotated back and forth between the cylinder 9 and the upper position, and a cooling metal that is fixed to the tip of the piston rod 9a of the cylinder 9 and that can be inserted into the sprue 3a and the container 12, respectively. 10
A device for solidifying molten metal at a sprue in mold casting, characterized by comprising: