JPH11179511A - Metallic mold of centrifugal casting apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the rusting in a rotary metallic mold, the deterioration of product quality represented as the development of pin hole and the development of a phreatic explosion caused by the cooling of the rotary metallic mold in a centrifugal casting apparatus with cooling water. SOLUTION: A metallic sleeve 9 having holes is fitted to the outer circumference of the rotary metallic mold 8 and also, the cooling water 12 is supplied from the outer peripheral side of the metallic sleeve 9 to the inner peripheral side thereof the cool the rotary metallic mold 8. A gap 14 between the metallic sleeve 9 and the rotary metallic mold 8 at the one end side and the other end side of the metallic sleeve 9 and the outer peripheral side of the metallic sleeve 9 at these parts are covered in the axial direction with a water stopping covers 28, 29.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a metal frame for a centrifugal casting machine.

[0002]

2. Description of the Related Art A centrifugal casting apparatus is one type of casting apparatus. The centrifugal casting apparatus tilts a casting ladle capable of storing the molten metal, thereby causing the molten metal to flow out of a pouring opening of the casting ladle. Is supplied by pouring into a horizontal metal frame. The metal frame is configured to be supported in the horizontal direction by a rotating roller and rotated at a high speed around an axis so that a cast iron tube can be cast by the action of centrifugal force.

FIG. 4 shows a detailed structure of such a metal frame.
The metal frame 4 has a rotating metal frame 8 for casting a cast iron tube as shown in the figure. A metal sleeve 9 is fitted around the outer periphery of the rotating metal frame 8. This metal sleeve 9
The ends of a large number of set bolts 10 screwed through the metal sleeve 9 at positions along the entire length and the entire circumference press the outer surface of the rotating metal frame 8 so as to be concentric with the rotating metal frame 8. It is fixed in the centered state. The metal sleeve 9 has a large number of through-holes 11 over its entire length and the entire circumference, and cooling water 12 supplied from above the metal frame 4 toward the metal frame 4 is supplied with the cooling water 12.
The rotary metal frame 8 is configured to be cooled by passing through 1 and reaching the rotary metal frame 8. A water receiver 13 is provided below the rotating metal frame 8. After cooling, the water receiver 13 receives water 15 flowing down through the through-hole 11 and the gap 14 between the end of the metal sleeve 9 and the rotating metal frame 8.

According to such a configuration, the cooling water 12 is supplied from above while rotating the metal frame 4 during the casting or until the next casting after the casting to perform shower cooling. It is possible to prevent the temperature of No. 4 from becoming high and causing the bend or making the coating of the inner surface difficult. Further, the metal sleeve 9 is fixed to the rotating metal frame 8 by the set bolt 10 at a position extending over the entire length and the entire circumference, whereby the bending of the metal frame 4 during casting can be forcibly prevented.

[0005]

However, the water 15 passing through the gap 14 between the end of the metal sleeve 9 and the rotating metal frame 8 and the like.
However, it is easy to enter the inside of the rotating metal frame 8 through the openings 5A and 5B at both ends, and as a result, rust is generated on the inner surface of the rotating metal frame 8 or moisture remains on the inner surface of the rotating metal frame 8, resulting in formation. If an outer surface pinhole is generated in the cast iron pipe, and a large amount of water 15 flows into the rotating metal frame 8, there are problems such as a steam explosion occurring at the time of casting the molten iron.

Accordingly, the present invention solves such a problem and provides a product typified by rust and pinholes in the rotating metal frame caused by cooling the rotating metal frame with cooling water. It is an object of the present invention to prevent deterioration in quality and occurrence of a steam explosion.

[0007]

According to the present invention, a metal sleeve having a hole is fitted around a rotating metal frame and cooling is performed from the outer peripheral side to the inner peripheral side of the metal sleeve. In a metal frame of a centrifugal casting apparatus in which water is supplied to cool the rotary metal frame, between the metal sleeve and the rotary metal frame at one end side and the other end side of the metal sleeve and the outer periphery of the metal sleeve The side is covered in the axial direction by a water stop cover.

[0008] With such a configuration, the space between the metal sleeve and the rotating metal frame at one end and the other end of the metal sleeve and the outer peripheral side of the metal sleeve are covered in the axial direction by the water stop cover. The cooling water is prevented from flowing into the rotating metal frame, and the problem caused by the flow is eliminated.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIGS. 1 to 3, reference numeral 8 denotes a rotating metal frame, and reference numeral 9 denotes a metal sleeve, which have the same configuration as that shown in FIG. That is, the metal sleeve 9 has a large number of through holes 11 and a large number of set bolts 10.
Thus, it is fixed to the outer periphery of the rotating metal frame 8 in a centered state.

The rotating metal frame 8 and the metal sleeve 9
Are arranged in the horizontal direction, and are covered by a cover 21 having a rectangular cross section over the entire length. This cover 2
In a position above the metal sleeve 9 inside the inside of the water supply pipe 1, along the length direction of the metal sleeve 9,
2 are provided. The water supply pipe 22 receives the supply of the cooling water 12 from a pump 23 provided outside the cover 21 and has a metal sleeve below a supply hole 24 provided at a plurality of positions along the length direction. It is configured such that the cooling water 12 can flow out toward 9.

A water receiving portion 25 for receiving the water 15 flowing down from the metal sleeve 9 is provided below the metal sleeve 9 in the cover 21. 26 is a drain pipe to the outside of the cover 21 and a valve 27
Through the water receiving portion 25.

Reference numerals 28 and 29 denote waterproof covers formed of rubber or the like. Among these, the water stop cover 28 is fitted in the insertion forming portion 30 of the rotating metal frame 8 in a sealed state in a sealed state, and the metal sleeve 9 corresponding to the insertion forming portion 30.
Of the rotating metal frame 8 and the metal sleeve 9 in the opening forming portion 30 by contact with the end of the metal sleeve 9 in a sealed state.
And the outer peripheral portion of the metal sleeve 9 are axially covered in a sealed state. In addition, the water blocking cover 2
A ring 31 for preventing the 8 from coming off from the opening forming section 30 is fitted. On the other hand, waterproof cover 2
9 is fitted around the neck of the socket forming portion 32 of the rotating metal frame 8 in a sealed state, and comes into contact with the end of the metal sleeve 9 corresponding to the socket forming portion 32 in a sealed state. The gap 14 between the rotating metal frame 8 and the metal sleeve 9 in the socket forming portion 32 and the outer peripheral portion of the metal sleeve 9 are covered in the axial direction in a sealed state. Each waterproof cover 28,
The outer edge of 29 is attached to the inner surface of the cover 21.

In such a configuration, the cooling water 12 supplied from the pump 23 to the water supply pipe 22 flows down from the supply hole 24 and reaches the upper portion of the metal sleeve 9, where the cooling water 12 is supplied.
Is supplied in the form of a shower to the outer surface of the rotating metal frame 8 to cool the rotating metal frame 8. The cooled water 15 flows down from the through hole 11 of the metal sleeve 9 and is received by the water receiving portion 25. The water 15 accumulated in the water receiving portion 25 is discharged to the outside via a drain pipe 26.

At this time, the gap 14 between the rotating metal frame 8 and the metal sleeve 9 in the opening forming section 30 and the outer peripheral portion of the metal sleeve 9 in that portion are covered by the water stop cover 28 in a sealed state. Since the gap 14 between the rotating metal frame 8 and the metal sleeve 9 in the receiving port forming portion 32 and the outer peripheral portion of the metal sleeve 9 in that portion are covered by the water blocking cover 29 in a sealed state, the rotating metal frame 8 Is prevented from flowing into the inside through the openings 5A, 5B at both ends of the. For this reason, rust is generated on the inner surface of the rotating metal frame 8, moisture remains on the inner surface of the rotating metal frame 8, an outer pinhole is generated in the formed cast iron pipe, and a large amount of water 15 is rotated. It is possible to reliably prevent the occurrence of steam explosion during the casting of the molten iron flowing into the metal frame 8. In addition, since the metal sleeve 9 and the water supply pipe 22 are covered with the cover 21, it is possible to prevent the cooling water 12 from scattering.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Using a centrifugal casting apparatus having the structure shown in FIGS.
The outer diameter of the rotating metal frame 8 is 153 mm, its total length is 4 m, the inner diameter of the metal sleeve 9 is 175 mm, and its outer diameter is 255 m
m, the inner diameter of the water stop covers 28 and 29 was configured to be 153 mm. Then, while rotating the rotating metal frame 8 and the metal sleeve 9 at 200 rpm, the cooling water 12 was blown out from the water supply pipe 22 at 400 liter / min to perform shower cooling. As a result, it was possible to prevent the cooling water from flowing into the rotating metal frame 8.

[0016]

As described above, according to the present invention, the rotating metal frame is cooled by supplying cooling water from the outer peripheral side to the inner peripheral side of the perforated metal sleeve provided around the rotating metal frame. In the metal frame of the centrifugal force casting device, the space between the metal sleeve and the rotating metal frame at one end and the other end of the metal sleeve and the outer peripheral side of the metal sleeve were axially covered by a water stop cover. Cooling water can be reliably prevented from flowing into the rotating metal frame, thus preventing rusting in the rotating metal frame, deterioration in product quality typified by pinholes, and prevention of steam explosion. Can be.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a metal frame of a centrifugal casting device according to an embodiment of the present invention.

FIG. 2 is a right side view of a metal frame of the centrifugal casting device shown in FIG.

FIG. 3 is a left side view of a metal frame of the centrifugal casting apparatus shown in FIG.

FIG. 4 is a longitudinal sectional view of a metal frame of a conventional centrifugal casting device.

[Explanation of symbols]

 Reference Signs List 8 rotating metal frame 9 metal sleeve 11 through hole 12 cooling water 14 gap 28 water stop cover 29 water stop cover

Claims (1)

[Claims] 1. A perforated metal sleeve is fitted around a rotating metal frame, and cooling water is supplied from an outer peripheral side to an inner peripheral side of the metal sleeve to cool the rotating metal frame. A metal frame of a centrifugal casting device, wherein a portion between the metal sleeve and the rotary metal frame at one end and the other end of the metal sleeve and an outer peripheral side of the metal sleeve are axially covered by a water stop cover. A metal frame for a centrifugal casting device.