Method and device for spraying inner wall of mold die cavity of horizontal centrifuge

Abstract

The invention discloses a method and device for spraying an inner wall of a mold die cavity of a horizontal centrifuge, and belongs to the technical field of spraying of coatings. The method comprises the following steps of fixing a spray gun to the head of a push rod; erecting the push rod to a fixing bracket, and pushing the push rod from one end of the mold die cavity to the other end of the inner part of the mold die cavity on the fixing bracket; erecting a supporting frame under the head of the push rod, and leveling the push rod by the supporting frame, so that the rod body of the push rod is parallel to the axis of the mold die cavity; rotating the mold die cavity at a uniform speed, turning on the spray gun, and pulling the push rod back at the uniform speed; and pulling the push rod out of the mold die cavity at the uniform speed, and turning off the spray gun so that the spraying is completed. Through the adoption of the method disclosed by the invention, in the process of spraying, the consistency of the height of the spray gun is guaranteed, the problem of uneven thickness of the coating caused by the changes of the height of the front end of the push rod is solved, and the spraying quality is improved; and besides, through the adoption of the mechanized operation realized by the method disclosed by the invention, the quality problem which is liable to cause by manual operation is avoided, and the spraying efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of paint spraying, in particular to the spraying of the inner wall of a mold cavity of a horizontal centrifuge. Background technique [0002] Before using a horizontal centrifuge for centrifugal casting, a layer of coating needs to be sprayed on the inner wall of the mold cavity. In the existing process, the spray gun is placed in the center of the push rod head, and the spray gun is extended to the mold by the push rod. The other end of the cavity is then sprayed during the process of pulling back the push rod; during the process, the front end of the push rod naturally droops due to gravity, and with the retraction of the push rod, the head of the drooping push rod gradually returns to the required In this way, during the spraying process, the spray gun forms a process from low to high during the movement of the inner wall of the mold cavity, which makes the coating on the inner wall of the mold cavity une...

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Problems solved by technology

[0002] Before using a horizontal centrifuge for centrifugal casting, a layer of coating needs to be sprayed on the inner wall of the mold cavity. In the existing process, the spray gun is placed in the center of the push rod head, and the spray gun is extended to the mold by the push rod. The other end of the cavity is then sprayed during the process of pulling back the push rod; during the process, the front end of the push rod naturally droops due to gravity, and with the retraction of the push rod, the head of the drooping push rod gradually returns to the required In this way, during the spraying process, the spray gun forms a process from low to high during the movement of the inner wall of the mold cavity, which makes the coating on the inner wall of the mold cavity uneven and affects the quality of casting high-precision centrifugal tube blanks

[0003] In the Chinese Utility Model Patent (Application No. 201420572994.X), a height-adjustable pipeline inner wall spraying equipment is disclosed. The spraying pipe is supported by a height adjustment device. The walking device, its application range is the spraying operation in which the pipeline to be sprayed does not rotate by itself, and the walking device travels along the axial direction of the pipeline; if the spraying operation is carried out while the pipeline to be sprayed rotates at a constant speed, this device cannot be applied, because in In a pipeline that rotates at a constant speed, the walking device is prone to shift under the drive of the inner wall of the pipeline, so the spraying distance of the spray gun is always changing, and the uniformity of spraying cannot be guaranteed

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