Spraying machine for pipe mold powder

Abstract

The invention discloses a spraying machine for pipe mold powder. The spraying machine comprises a big hopper (1) and a gas pressure system. An injection pipe (4) is arranged under the big hopper (1) and connected with a pipe mold powder injection gas channel of the gas pressure system. According to the technical scheme, the technique of gas pressure control transmission is adopted, so that complex mechanical transmission is reduced, the replacement cost of abrasion parts is reduced, and the production efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of cast pipe production equipment. More specifically, the present invention relates to a pipe mold powder spraying machine. Background technique [0002] In water-cooled metal mold casting, it is often necessary to add silicon barium powder, also known as tube mold powder, to the metal mold, and its particle size is 0-0.3mm. The amount added is generally determined according to the surface area of ​​the pipe mold. Powder delivery is generally achieved using a mechanical device screw or a combination of screw pressurized air. In the prior art, there are two ways of conveying the pipe mold powder: [0003] One method is: the hopper is under the iron drop chute of the taphole, and the hydraulic motor drives the screw rod more than 6m long below the launder to send the pipe mold powder into the pipe mold. Due to the small feeding port of this device, it is inconvenient to feed materials, and once the launder...

AI Technical Summary

Problems solved by technology

The screw rod of this device is relatively short, so it is not easy to be stuck. However, during the wind blowing process, when the resistance in the 6m pipe is large, the wind will blow back to the position of the large hopper and the bearing seat, causing the bearing to be damaged and unable to add pipe mold powder, resulting in shutdown for maintenance. As a result, continuous production is stopped; the failure rate of its mechanical transmission is high, and the screw rod, bearing, and conveying pipe are worn out quickly, which increases the maintenance workload and increases the production cost.

[0005] According to the above two pipe mold powder conveying devices, in actual production, due to the mutual friction between the screw rod and the pipe mold powder, the service life of the screw rod is short, and the processing cost of the screw rod is high.

Another type of conveying device also has problems, such as the frequent occurrence of air return, which affects continuous production, high failure rate, high maintenance cost, and has a great impact on product quality

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