SU76613A1 - Centrifugal horizontal pipe casting machine - Google Patents

Description

The proposed horizontal machine for centrifugal casting of pipes consists of three components: the actual machine with the mold, the device for pushing out the cast pipe and the pulling device on the carriage.

FIG. I shows a general view of the machine with a partial cut; in fig. 2 is a view along arrow A in FIG. one.

A portion of the metal from the bucket 6 is inserted into the cavity of the rotary mold / closed by two pistons of the front-right 4 and rear 5. During the centrifugal casting process, a pipe is formed inside the cooled mold. The mold is surrounded by a water-cooling jacket 7 and, together with the outer rotor 8, rotates in two lunettes 9 and 9a.

The pushing device is a rod 2, at one end of which a piston 5 is fitted. This piston not only limits the cavity of the mold /, it also serves to pre-press the cast pipe and push it out (for some distance) after casting.

When the mold rotates / during the casting of the pipe, the piston 5 is entrained by the force of friction and rotates with the mold and with the rod 2 on which it is mounted.

27 Szod, Issue 9, 1949 R.

In addition to this rotational movement, a mechanism is provided for allowing the piston 5 to move the molded pipe out of the mold, which is a cylinder 10 that can move right and left along the guides 11. The latter, together with the stop 12, are rigidly connected to the machine base 13 .

Cylinder 10 is rigidly connected to cylinder 14 in which the end of rod 2 is seated; Thus, this rod can rotate in the cylinder 14 together with the piston 5 mounted on its other end. In the cylinder 10 there is a piston 16 mounted on the rod 15; the other end of the rod 15 is rigidly connected with the nut 17 with the stop 12.

The ejector device operates as follows. Compressed air is supplied to the cylinder 10, under the action of which the cylinder moves in the guides 11 along with the cylinder 14 and the rod 2 fixed axially by the pin 17a. If the compressed air is supplied to the right side of the cylinder 10, then the entire system with the piston 5 also moves to the right and pushes the cast pipe out of the mold /. When compressed air is supplied to the left side of the cylinder 10, sun si417

The piston system 5 returns to the initial position shown in FIG. 1 and is stopped by the automatic stops provided on both sides of the piston 16.

After casting, the tubing bucket 6 and the piston 4 are retracted to the side and the tube is pushed out of the mold / by some distance using the device described above. A pulling device mounted on trolley 3 is then put into operation. The latter is rolled along rails 17 on four wheels 18 by means of a winch 19 and a cable thrown over blocks 20 and 20a.

In the front (left) part of the carriage 3 of the pulling device, there is a pair of eccentric cams 21 (Fig. 2). When the cart 3 is supplied to the mouth of the mold 1, the half rod 22 gets inside the pipe, and the cams 21 rotate around their vertical axes and clamp the end of the pipe ejected from the mold. After that, winch 19 is turned on and the pipe is pulled out of the machine.

For casting pipes of different diameters, it is possible to replace the mold 1, as well as the pistons.

To provide support to the end of the pipe clamped by cams 21 by changing its diameter, a shaped roller 23 is fitted on axis 24 and mating with levers 25. When rotated by means of the wheel 26, levers 27 and 25 around the axis .25 axis 24 raises (or lowers) shaped roller 23, on which the end of the exhaust pipe is resting.

For casting the pipe into the sand, the hollow rod 22 of the carriage 5 has a longitudinal groove 28 (Fig. 2). sand that is poured on the sand. Before the metal is poured, the core 22 is inserted into the mold, with the wheel 3 in the mold 1, it is rotated and the sand is poured into the mold. When the mold is then rotated, the sand forms a sand mold - a layer into which the metal is already poured.

Subject invention

Claims (3)

1. A centrifugal horizontal machine for casting pipes using an ejector and an extrusion casting device, wherein the ejector device is rigidly connected to the movable drive cylinder 14, in order to avoid engaging the rotary mold 7 of the centrifugal machine in rotation of the piston 16. 2. In the centrifugal horizontal machine according to claim 1, applying a partially extruded casting device from a mold to a mobile device, characterized by the use of a pair of cams 21 intended to reach the product when the device approaches the mold and to clamp and pull the product when the device is removed from the mold. 3. The form of the centrifugal horizontal machine according to claim 2, characterized in that on one carriage 5 with a casting-pulling device a lever mechanism is mounted, the lever 25 of which is carried by a roller 23 mounted on its end to support the front end of the casting stretching to avoid bending. ./ - iLLM and and f FIG. one