JPH01122646A - Continuously centrifugal casting apparatus - Google Patents

Abstract

PURPOSE:To efficiently and surely execute casting work by fixing plural molds composing copes and drags on a rotary table, pouring molten metal in order into the mold while rotating the rotary table, centrifugal-casting and taking out the casting by separating the mold. CONSTITUTION:At the prescribed positions A-F in the rotary table 1, the molds 7 composing of the copes 8 and the drags 9 and rotating bodies 13 having rotating disks 6 are set and the rotary table 1 is rotated while rotating the rotating bodies 13. The molten metal is poured into the mold 7 at B position and a hollow product 16 is formed by centrifugal force and carried to F position under rotating condition, to solidify the product 16. Successively, the brake is put on at G position and the rotation is stopped at I position and at the same time, the motor 4 is descended and the cope 18 is remained on a sleeve 3 and the drag 9 putting the product 16 is descended together with the rotating disk 6. Successively, the product 16 is scraped off from the drag 9 surface by a bending arm near J position and cleaning of the cope 8 and the drag 9, and applying of facing agent are executed by air blowing, etc., at interval from J position to L position and motor 4 is ascended and restored to the L position, and the cope 8 and the drag 9 are combined to form rotating body 13.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention mainly relates to a continuous casting apparatus for small centrifugally cast products.

Originally, the mass production of small castings was mainly done in the field of sand casting, in which a large number of products were made in one mold, and then the mold was destroyed to take out the products, but this manufacturing method caused pollution and There are many problems such as the necessity of finishing the product by casting. The present invention is an apparatus for centrifugally casting small hollow products one by one at high speed using a permanent mold such as a metal mold.
Its application fields are vast.

(b) Conventional technology As mentioned above, the main method for manufacturing small articles is by using a multi-cavity sand mold, but there is also a centrifugal casting method using a rotary table. However, the current state of the casting method in this case is that it takes a considerable amount of time to open and close the mold in order to take out the product from the mold on the rotary table. The reason for this is that the table rotates slowly because the mold is opened and closed while the table is stopped rotating at one position.

(c) Problems to be solved by the invention Needless to say, a requirement for high-speed continuous centrifugal casting is to pour a fixed amount of metal into the mold at high speed. Product removal.

That is, it is necessary to increase the moving speed of the mold, and to perform the operation simply, reliably, and efficiently, and this is the problem that the present invention aims to solve.

((b) Means for Solving the Problems The continuous centrifugal casting apparatus of the present invention allows the mold to be opened for product removal quickly and reliably by lowering the rotary plate on which the mold is mounted, Moreover, the problem was solved by allowing this work to be done while the mold was being moved.

(E) Example An example of the present invention will be explained below with reference to nine drawings.
In Figures 2 to 2, a plurality of round holes (2) are drilled near the outer periphery of the rotary table (1), and a shallow recess is provided on the outer periphery, into which the sleeve (3) is fitted. ing. A motor (4) is installed at the bottom of each round hole (2). The motor (4) is attached to the rotary table (1) by a strut (5).

It has a mounting structure in which it is lowered and restored by a hydraulic cylinder using the groove of the support column (5) as a guide. This rotary table (1) can also be rotated while stopping with the length between the centers of the round holes (2) as one section.

It also has the ability to continue rotating without stopping. In the round hole (2) of the rotary table (1), there is a rotary disk (6) directly connected to the motor (4), and a mold (7) is mounted on the top of the rotary disk (6). Mold (7)
As shown in Figures 3 and 4, the upper mold (8) and the lower mold (9)
Each of them contains an upper mold core 00 and a lower mold core σ°C for replacement, and the outer peripheral part of the lower mold (9) is fitted into the lower surface of the upper mold (8) to be assembled. There is a pouring port (12) on the upper surface of the upper mold (8), and the lower mold (9) is somewhat smaller than the upper mold (8) (the outer peripheral side of the upper mold (8) is the outer peripheral surface of the lower mold (9)). It has a combination structure that protrudes from the side.This mold (7)
are combined and mounted on the surface of the 9-turn disc (6) to form an integrated rotating body (13).The rotary disc (6), the lower mold (9), and the upper mold (8) are each pin(
14 and the pin Omukai prevent it from spinning idly.

In addition, to carry out the present invention, a pulley or gear is attached to the lower part of the round hole (2) of the rotary table (1), and the rotary table is connected to the rotation mechanism of an external drive device at a predetermined position. A method of rotating a rotating body, etc. can also be implemented. Also.

The rotary table (1) does not necessarily have to be circular, and the number of molds (7) on the rotary table (1) should be determined by the size of the product 00 and its curing time. .

(f) Function To explain the function of the embodiment of the present invention, the 9-turn table (1
), the rotating body circle at the predetermined position (A-F) starts rotating, and the necessary amount of molten metal is quickly poured from the pouring port σa of the mold (7) at position B, and the inner wall of the upper mold core 10 is poured. At this point, the product becomes a hollow product (IO) due to the centrifugal force effect.

Then, the mold is sent in a rotating state to the position F, during which the product (If13) is hardened.The mold is then braked at the position G, and the rotation is stopped at the position ■.

At the same time, the motor (4) descends, and as shown in Figure 2, the lower end of the outer periphery of the upper die (8) fits into the recessed part of the sleeve (3) and remains on the rotary table (1), on which the product is placed. Lower mold (
9) descends together with the rotary disk (6) through the round hole of the sleeve (3) to form upper and lower divisions of the mold (7). Then, near the position J, the product Q8 is scraped off from the surface of the lower mold (9) using a curved arm fixed to the outside of the nine-turn table (1). Then, blow air between J and L using the upper mold (
8) The lower mold (9) is cleaned and a coating agent is sprayed, and the upper mold (8) and lower mold (9) are assembled by raising and restoring the motor (4) until the position of L is reached, and the rotating body ( 13 is formed.Then, the combination of the mold (7) is confirmed at position A, and the metal is poured again at position B.This is a repeated process. mold (because the force is the same, extremely efficient mass production is possible.

Furthermore, if the pouring port aa of the mold (7) is large...
・In other words, in the case of a mold for a thin-walled ring-shaped product, pouring can be done while the mold (7) is passing through the pouring position B.

In that case, casting can be performed while the rotary table (1) continues to rotate without stopping. The sleeve (3) shown in Figure 9 has a round hole and a concave portion that match the size of the mold (7), and is used for each type of mold (7).

(g) Effects of the Invention By implementing the present invention, operations such as opening the mold, taking out the product, and assembling the molds can be performed simply and efficiently in a quick and reliable manner that corresponds to high-speed pouring. In other words, if the moving time of the paper mold is 1 second and the pouring stop time is 1 second, then 2 seconds/
production is possible. Furthermore, it becomes even more efficient when a method is implemented in which the rotary table is not stopped and the metal is poured while the mold is moving. Further, the device according to the present invention has the advantage that it has a simple and compact structure, can be manufactured at low cost, and requires less installation space.

Therefore, by carrying out the present invention, it is possible to obtain a continuous centrifugal casting apparatus that can mass-produce small centrifugally cast products individually and inexpensively, which has been difficult in the past.

[Brief explanation of the drawing]

Figure 1 is a plan view of one embodiment of the present invention, Figure 2 is Figure 1A.
- A cross-sectional view of the main parts along line A', Figure 3 is a plan view of the mold, Figure 4 is a plan view of the mold,
The figure is a cross-sectional view of the mold part on the rotary table. Explanation of symbols

Claims (1)

[Claims] A rotary disk (6) is attached to the lower part of a mold (7) consisting of an upper mold (8) and a lower mold (9) to constitute a rotating body (13), and the rotating bodies (13) are arranged in a continuous manner. The rotating body (13) moves sequentially drawing a constant trajectory, rotates the rotating body (13) only at a predetermined position, and lowers the rotating body (13) only at a predetermined position. Continuous centrifugal casting equipment.