SU425722A1 - AUTOMATIC INSTALLATION FOR CENTRIFUGAL CASTING - Google Patents

Description

one

The invention relates to foundry, in particular, to equipment for centrifugal casting.

A known installation for centrifugal casting comprising a rotary table with centrifugal molds mounted on it, a device for placing the core into a mold, a casting device, a embossing device and an exhaust system.

The proposed automatic installation differs from that known in that the mold in the centrifugal head is located on the drive rollers, and the knockout device installed in the exhaust system is made in the form of a piston cylinder with a hollow telescopic rod and a hollow ejector head with nozzles located on its outer surface under angle to the internal surface of the mold and directed towards the exhaust system.

This makes it possible to increase productivity, quality of castings and improve sanitary working conditions.

FIG. 1 schematically shows the proposed automatic installation for centrifugal casting, longitudinal section; in fig. 2 - the same in terms of; in fig. 3 - centrifugal head; in fig. 4 - knockout device; in fig. 5 - the same at work.

The automatic installation for centrifugal casting of sleeves contains a rotary table 1 of periodic operation with centrifugal heads 2 installed on it, a device 3 for mounting the rod 4, a filling device 5, a knockout device 6 of castings 7 and cleaning of molds 8 and an exhaust system 9. The rotary table 1 is equipped drive 10,

including the Maltese cross 11 and the limit switches: 12 - located at the entrance and 13 - at the exit from the engagement with the Maltese cross 11 drove 14. The centrifugal heads 2 are open on both sides; the housing of the mold rotates on the rollers 15. The drive is carried out by electric motors 16, which receive a command from the limit switches 17. The device 3 for installing the rod 4 into the mold 8 has a pneumatic actuator with limit switches located at the beginning and end of the rod stroke 18 s flange 19. Filling device 5 consists of a bucket 20 with a turning device, receiving a command via a time relay from chute 21. The knockout device b contains a hollow telescopic brush 22 with a pneumatic actuator 23 and limit switches 24. Rod 22 is provided with a hollow ejector head 25,

made with nozzles 26 on the radial surface 27. The nozzles are located at an angle to the inner surface 28 of the mold 8. The finished castings along chute 29 are fed to the casting conveyor.

Automatic installation for centrifugal casting sleeves works as follows.

When the exhaust system 9 is turned on, the pneumatic drive of the device 3 for mounting the rod (Fig. 1, 2) starts moving. The rod 18 with the flange 19 enters the mold 8, sets the rod 4 and at the end of its stroke presses the limit switch, which gives a command to exit the rod 18 from the mold 8. When returning to the initial position, the rod 18 presses the limit switch, which removes the lock from turntable drive 10 1.

The carrier 14, rotating continuously from the actuator 10, engages with the Maltese cross 11. During one revolution of the carrier 14, the table 1 is rotated by one position. When turning to the fill position, the centrifugal head 2 receives rotation from the electric motor 16 upon command from the limit switches 17.

At the pouring position, at the command of the end switch 13, installed at the exit of the carrier 14 from engagement with the Maltese cross And, the chute 21 enters the mold 8. The chute 21 is moved from the pneumatic actuator. At the same time, the bucket 20 rotates, and the metal along chute 21 enters the mold 8. After the metal dose is poured, on command from the bucket rotator through the time switch, chute 21 leaves the mold 8 and presses the limit switch, which allows the table to turn. After casting, the casting 7 is forcibly cooled in the mold 8 by means of an exhaust system 9 connected to the centrifugal head 2.

Cooling of castings with ventilation air flow has a number of advantages. The air passes through the internal cavity of the liner, simultaneously cooling the entire internal cavity of the casting. In addition, with such cooling, the installation of a cooling device is not required, since atmospheric air serves as the cooling body. At the same time, sanitary ventilation is carried out. Cooling occurs for a certain time in a given mode. The centrifugal head 2 is made

that the mold is open at both ends. This is due to the fact that the body of the mold is placed inside two rows of rollers located at an angle of 120 °. One of the lower rollers is driven. The drive is carried out by an electric motor 16, which receives a command from the limit switch 17. When the table 1 is turned to the knockout position, the rotation of the centrifugal head 2 is stopped by a command from the limit switch 17.

By moving forward, the ejector head 25 of the piston 22 of the pneumatic actuator 23 pushes the casting 7 into the casting chute 29 to the casting conveyor, and when moving backward from the limit switch 24 through the nozzles 26 located on the radial surface 27 of the pushing head 25 and angled to the inner surface 28 of the mold 8, and cleans this surface with a spiral air flow directed into the exhaust system.

Subject invention

1. Automatic installation for centrifugal casting, of advantage; naturally cylinder liners, including a rotary table with centrifugal heads with molds mounted on it, a device for placing the rod into a mold, a casting device, a knockout device and an exhaust system, characterized in that In order to improve productivity, quality of castings and improve sanitary working conditions, the mold in the centrifugal head is located on the drive rollers and the knockout device is installed in the exhaust system.

2. Automatic installation of claim 1, characterized in that the knockout device is made in the form of a piston cylinder with a hollow telescopic rod and a hollow ejector head with nozzles located on its outer surface at an angle to the inner surface of the mold and directed towards the exhaust system .

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