JPH0785791B2 - How to apply release agent to bearings - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a method of applying a release agent to a bearing,
More specifically, the present invention relates to a method of applying a release agent to the bearing surface of a bearing when manufacturing a shaft that fits in the bearing.

(Prior Art) A conventional method of applying a release agent to a bearing is as shown in FIG.
The opening side of the bearing 4 is directed upward, the nozzle 1 is disposed above the bearing 4 with a certain distance and the centers of the nozzles are aligned, and the mold release agent 2 is sprayed downward from the nozzle 1 onto the bearing surface 3 of the bearing 4. It depends.

(Problems to be Solved by the Invention) However, if the mold release agent is sprayed downward from above the bearing as described above, a part of the bearing surface of the bearing after spraying may be necessary unless the centers of the nozzle and the bearing are precisely aligned. Although the release agent forms a uniform layer, a non-uniform layer is partially formed, and the film thickness of the release agent becomes non-uniform, deteriorating the releasability. In addition, even if the centers are precisely aligned, a non-uniform layer is also generated due to variations in the spray state of the release agent. In addition, the bearing is facing upward, so the applied release agent drips, which causes a secondary problem that an excess layer of release agent is generated on the bottom surface of the bearing surface.As a result, a shaft is manufactured using this bearing as a mold. At this time, a part of the shaft is lacked.

The present invention is intended to solve the above problems, and an object of the present invention is to provide a method for uniformly applying a release agent over the entire bearing surface of a bearing.

(Means for Solving Problems) The present invention is directed to a bearing having a tubular shape with one end open and the other end closed, and a bearing surface on the inner peripheral portion of which is directed downward, Is rotated about its center line, and the release agent is intermittently sprayed from the lower side of the bearing toward the bearing surface.

In the present invention, the opening side of the bearing having the above-mentioned shape is directed downward, and by spraying the release agent upward from the lower side toward the bearing surface of the bearing, excess release agent is dripped off, and the entire bearing surface is formed. The release agent is applied over a uniform thickness.

Further, according to the present invention, by applying the release agent while rotating the bearing, generation of a non-uniform layer of the release agent due to variations in the spray state is prevented.

Furthermore, in the present invention, the release agent is sprayed intermittently onto the rotating bearing, so that the release agent is effectively applied to the bottom surface of the bearing of the closed bearing. It is preferable that the release agent is sprayed several times, for a short time at each rotation angle of the rotating bearing. In the case of continuous coating, the pressure inside the bearing increases immediately after spraying, so that the spray flow cannot reach the bottom surface of the bearing, but by intermittently spraying multiple times, it is possible to effectively and easily release the release agent to the bottom surface of the bearing. Make it reach.

(Operation) By the method of the present invention described above, the release agent is uniformly applied over the entire bearing surface of the bearing.

(Example) The present invention will be further described based on examples, but the present invention is not limited thereto.

FIG. 1 shows an embodiment of the present invention. This shows application of a release agent to the bearing of the outer spline.

The bearing 4 is provided with the rotating device 5 facing downward, and the nozzle 1 is arranged under the bearing 4 by aligning the center with the rotating device 5. The rotating device 5 moves the bearing 4 around its center line (arrow). Direction), the release agent 2 is sprayed from the nozzle 1 many times at each rotation angle.

As a result, the release agent was applied to the entire bearing surface 3 of the bearing 4 in a uniform film thickness without forming an excessive layer of the release agent on the bearing bottom surface 6 of the bearing surface 3 to form a uniform layer of the release agent. .

(Effects of the Invention) By the method of applying a release agent to a bearing of the present invention, a uniform film thickness of the release agent can be easily obtained over the entire bearing surface of the bearing, which causes a problem of poor releasability and a product which have been problems in the past. The product defect rate due to lack of meat was significantly reduced. Furthermore, the intermittent spraying of the release agent enables effective application to the bottom surface of the bearing, reducing the amount of release agent used.

[Brief description of drawings]

 FIG. 1 is an explanatory diagram of an embodiment of the present invention, and FIG. 2 is an explanatory diagram of a conventional technique.

Claims (1)

[Claims] 1. A cylindrical bearing having one end open and the other end closed and having a bearing surface on the inner peripheral surface thereof faces downward, and the bearing is rotated around its center line. A method for applying a release agent to a bearing, characterized in that the release agent is intermittently sprayed from the lower side of the bearing toward the bearing surface.