JPS6257388B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a method for manufacturing a locking nut, and includes either a rotating roller whose surface is coated with synthetic resin, or a rotating roller whose surface is spouted with synthetic resin from countless minute spouting ports. A synthetic resin spray coating device or the like is used to press one or more surfaces perpendicular to the threaded hole of the nut to coat the synthetic resin, and the synthetic resin is caused to flow into the threaded hole to form a synthetic resin coating on the threaded part. This relates to a method for manufacturing locking nuts. By forming a synthetic resin coating on the threaded portion of the nut, it is possible not only to prevent rust but also to tighten the nut more firmly against the threaded shaft. Conventionally, applying a synthetic resin coating to the threaded portion of a nut requires applying a synthetic resin solution by hand each time before attaching the coating, which requires a large amount of materials and labor. The present invention relates to a method for molding a synthetic resin coating on the threaded surface of a nut, which solves the conventional drawbacks and enables mass production of uniform products using an extremely simple method.An example of the present invention is shown in the drawings below. This will be explained in detail below.

As shown in the figure, the first roller 1 of a suitable number of rollers rotating in opposite directions with their surfaces in contact with each other is brought into contact with and attached to the synthetic resin surface of a container 2 containing resin liquid, and these rollers are brought into contact with each other and rotated in opposite directions. It is transmitted one after another by rollers rotating in opposite directions in contact with each other, or controlled by adjusting plate 3 and rollers 5 and 6 to adjust to the optimum viscosity and film thickness, and then passed under coating roller 8 on moving device 7. The head of the nut 10 is strongly pressed to cause the synthetic resin adhering to the surface of the roller 8 to flow into the head of the nut and the screw hole, and to descend over the screw surface to coat the surface of the screw with the synthetic resin liquid. Next, compressed air is blown from the nozzle 12 from above the nut 10 that has passed directly under the roller 8, so that the synthetic resin liquid adhering to the head and screw hole of the nut 10 is dropped into the screw hole and diffused to make the screw surface uniform. The surface of the screw is coated with a synthetic resin coating of a certain thickness and then cured by air drying at room temperature, or passed through a heating furnace to form a coating by baking the synthetic resin coating on the surface of the screw.

Alternatively, as shown in FIG. 2, instead of using a roller, the resin liquid may be directly flowed into the head or screw hole of the nut from a synthetic resin spray coating device 13, or may be sprayed using an injection pump, spray gun, etc. Feeding device 1 directly onto the roller without using a container containing resin liquid
Drop the resin from 6 and place it on the roller or adjusting plate 3.
The viscosity and film thickness can be adjusted using the coating roller 8 to coat the object to be coated, and each device may be equipped with a built-in heater to improve the fluidity and adhesion of the resin. In addition, when coating an insoluble resin in a solvent, the resin is heated and melted using a heater built into each device, and the resin is sprayed onto the object to be coated using a jet pump or a spray gun, or a roller 8 or a jet coating device 13 is used.
To coat an object, etc. Also, baking of the resin of the material to be coated can be carried out before or after coating with the resin, depending on the state of the material to be coated.

[Brief explanation of the drawing]

FIG. 1 is a side view of the present invention, and FIG. 2 is a side view of the present invention. 1...Roller, 2...Resin liquid container, 3...
Adjustment plate, 5...Roller, 6...Roller, 8...
... Resin coated roller, 10... Nut, 12...
Compressed air blowing nozzle, 13...Resin spray coating device, 7...Moving device.

Claims (1)

[Claims] 1. Inject the synthetic resin liquid into the screw hole of the nut,
A locking nut characterized in that a synthetic resin liquid film is formed on the threaded hole surface, and then compressed air is blown to diffuse the synthetic resin liquid, thereby forming a synthetic resin film with a uniform thickness on the threaded surface. manufacturing method.