JPS6347110A - Manufacture of metallic component filled with rubber - Google Patents

Abstract

PURPOSE:To make it possible to coat adhesive by the mechanically enough amount and consequently remove the scattering in performance and improve the durability of a part by a method wherein the surface of thread groove, which is formed on the inner surface of a metallic tube, is gradually covered from its upper part by the adhesive and, after the drying of the adhesive, green rubber is filled in the metallic tube so as to be vulcanizingly formed in mold. CONSTITUTION:Adhesive 3 is dropped onto the upper screwed part of a metallic tube 1 and an externally threaded member 2, both of which are screwed together with each other. Next, when the externally threaded member 2 is pivoted so as to lower itself, the adhesive 3 gradually covers the thread groove on the inner surface of the metallic tube 1 only by the portion, from which the externally threaded member disengages. Further, when the externally threaded member 2 is completely disengaged from the metallic tube, the thread groove on the inner surface of the metallic tube 1 is completely covered by the adhesive 3 with the disengagement of the externally threaded member. The metallic tube, the coating of adhesive on the inner surface of which is completed, is dried and, after that, filled with green rubber and finished by vulcanizingly forming. The formation of thread groove on the inner surface of the small bore metallic tube brings the increase of the bonding area between the rubber and the metallic part and consequently, the increase of bonding force and at the same time the fitting of the rubber to the indentation of the thread groove by filling and vulcanizing of the rubber prevents the bonding failure of the rubber part to the inner metallic wall from occurring.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for manufacturing a mechanical component having a structure in which a small diameter metal cylinder is filled with rubber. In particular, the present invention relates to a manufacturing method that focuses on a method of applying an adhesive between rubber and metal, which has a large effect on the quality of parts made of metal and rubber.

[Prior Art] Parts in which a small-diameter metal cylinder is filled with rubber are used in a wide range of applications, but the quality of these parts is greatly influenced by the adhesion between the rubber and the metal surface. In order to improve this adhesion, the adhesion is strengthened by roughening the adhesion surface of the metal to the rubber by sandblasting or the like to increase the adhesion area, or by applying a suitable adhesive.

It is necessary to apply a sufficient amount of adhesive to the metal part to which the rubber is to be bonded, and conventional methods have been to apply the adhesive manually with a brush, brush, etc., or to mask the area and spray the adhesive onto the designated area.

However, in order to sufficiently apply adhesive to the inner surface of a small-diameter metal cylinder, the above method requires a great deal of effort, and since it is done manually, it is difficult to prevent variations in the amount of adhesive applied, resulting in poor product quality. is also difficult to be constant.

[Problems to be Solved by the Invention] When bonding rubber to the inner surface of a small-diameter metal cylinder, the present invention aims to increase the bonding surface and strengthen the bonding force, and also to apply the adhesive to a sufficient level without using manual labor. The objective is to obtain metal parts filled with rubber that has excellent performance and has uniform adhesive strength when applied to the bonding surface.

[Means for solving the problem] A threaded groove is formed on the inner surface of a small-diameter metal cylinder filled with rubber, and when a male threaded member that is screwed into the threaded groove is rotated and removed, the member is Adhesive is dripped and the thread groove surface on the inner surface of the metal cylinder is coated with adhesive from the top by rotating and releasing the male threaded member. After drying, unvulcanized rubber is filled into this and vulcanized in a mold. Molded to produce rubber-filled metal parts.

[Function] By forming a thread groove on the inner surface of a small diameter metal cylinder,
The bonding area between the rubber and metal part becomes larger, increasing the adhesive strength, and the unevenness of the rubber and thread grooves fit together due to filling and vulcanization of the rubber, which prevents the rubber part from falling off due to poor adhesion from the metal inner wall. can.

In addition, the adhesive can be applied to the adhesive surface by dropping the adhesive from above onto the threaded part of the male threaded member that is threaded into the thread groove on the inner surface of the metal cylinder. The adhesive on the upper part sequentially covers the surface of the thread groove on the inner surface of the metal cylinder from the top, and when the male threaded member is completely removed, the inner surface of the metal cylinder is sufficiently coated with the adhesive.

Therefore, a metal part obtained by filling the metal cylinder with rubber and vulcanizing and molding it in a mold becomes a product with strong adhesion between the rubber and the metal part with little variation.

The above operations can be performed in conjunction with multiple units, which is effective in reducing man-hours.

[Example] One embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a cross-sectional view showing a state in which a male screw member is screwed onto the inner surface of a metal cylinder, and an adhesive is dripped onto the top.

FIG. 2 is a sectional view showing a state in which the male threaded member is partially detached from the metal cylinder.

FIG. 3 is a sectional view showing a state in which the male screw member is completely removed from the metal cylinder.

A metal cylinder 1 and a male screw member 2 are screwed together, and an adhesive 3 is dripped onto the screwed part of the upper part. Next, when the male threaded member 2 is rotated and lowered as shown in FIG. 2, the adhesive 3 sequentially covers the thread grooves on the inner surface of the metal cylinder 1 starting from the upper part of the part where the male threaded member 2 has come off.

Furthermore, as the male screw member 2 is completely removed as shown in FIG. 3, the thread groove on the inner surface of the metal cylinder 1 is completely covered with the adhesive 3.

After the metal cylinder has been coated with adhesive and is dried, it is filled with unvulcanized rubber and finished by vulcanization molding.

[Effects of the Invention] According to the present invention, when manufacturing a metal part in which a small-diameter metal cylinder is filled with rubber, a sufficient amount of adhesive can be mechanically applied without requiring manual adhesive application operations such as brushes or brushes. It is possible to obtain a product that can be coated with an adhesive, has consistent performance, is highly durable, and has adhesive properties between rubber and metal parts.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing a state in which a male screw member is screwed onto the inner surface of a metal cylinder, and an adhesive is dripped onto the top. FIG. 2 is a sectional view showing a state in which the male threaded member is partially detached from the metal cylinder. FIG. 3 is a sectional view showing a state in which the male screw member is completely removed from the metal cylinder. 1...Metal cylinder, 2...Male thread member,
3...Adhesive.

Claims (1)

[Claims] In the manufacture of metal parts made by filling a small-diameter metal cylinder with rubber, a thread groove is formed on the inner surface of the metal cylinder, and when a male threaded member that is screwed into the thread groove is rotated and removed, the member is Adhesive is dripped from the top, and the thread groove surface on the inner surface of the metal cylinder is sequentially coated with adhesive from the top by rotating and releasing the male threaded member. After drying, unvulcanized rubber is filled into this and molded. A method for manufacturing metal parts filled with rubber, characterized by vulcanization molding.