JPS6012206B2 - How to make bushiyu - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a buffer section made of a rubber-like elastic material between an inner metal ring and an outer metal ring that are combined with each other, and The present invention relates to a method of manufacturing a bushing by attaching a liner made of a synthetic resin material with low abrasion properties.

As shown in FIG. 1, a rubber-like elastic material is provided between the outer metal ring 1 and the inner metal ring 3, which are assembled together. When manufacturing a bush in which a bonded buffer member 2 is interposed and a liner 4 made of synthetic resin is adhered to the inside of an inner metal ring 3, the liner 4 is adhered to the inner metal ring 3. Then, the buffer member 2 is formed by injecting an uncured rubber-like elastic material between the inner and outer metal rings 1 and 3 in a heated state, or the buffer member is formed between the inner and outer metal rings 1 and 3. One possible method is to insert the liner 4 and adhere it to the inner metal ring 3 after forming the inner metal ring 2, but all of these manufacturing methods are inefficient due to complicated steps. .

The present invention enables the above-mentioned bush having a buffer section made of a rubber-like elastic material and a liner made of a synthetic resin material to be manufactured extremely efficiently by a simple process, and in addition to both the inner and outer metal ring materials. In addition, a synthetic resin material for forming the liner is made into a pipe shape with a smaller outer diameter (compared to the inner diameter of the inner metal ring), and a piece of material is processed to form the buffer member. A piece of rubber-like elastic material made of sulfur is prepared in such a manner that the material has an amount larger than that required to form the cushioning member, while a mold is used as a molding cavity and a material injector. An inner cavity is formed inside the inserted pipe-shaped piece of synthetic resin material, and the cavity for molding, the cavity inside the piece of synthetic resin material, and the recess for material injection are connected to each other. A mold provided with suitable first and second material injection holes and equipped with a material injection means is prepared, and both an inner and outer metal ring and a piece of synthetic resin material are placed in the molding cavity, and a rubber-like elastic material is The piece is placed in the material injection recess, the mold is heated, and the material injection means is pressurized to press a part of the rubber-like elastic material piece into the middle of both the inner and outer metal rings to form a buffer member. After guiding a part of the rubber-like elastic material piece into the inner cavity of the synthetic resin material piece, and using the pressure thereof, the synthetic resin material piece expands outward and adheres to the inner circumferential surface of the inner metal ring. The product is then removed from the mold and subjected to the required finishing process.

The inner circumferential surface of the outer metal ring and the outer circumferential surface of the inner metal ring are subjected to surface treatment in advance for adhering a rubber-like elastic material,
An adhesive is applied in advance to either or both of the inner circumferential surface of the inner metal ring and the outer circumferential surface of the synthetic resin material piece. Hereinafter, a method for manufacturing a bush according to the present invention will be explained based on the drawings.

FIG. 2 shows an embodiment of the mold used in the bush manufacturing method according to the present invention, which comprises a lower mold 10, an intermediate mold 17, an upper mold 20, and a material injection means 25. The mold 101 has a material piece guide part 12 that protrudes upward in the center and has an outer diameter that is approximately equal to the inner diameter of the synthetic resin material piece 7, and has a material piece guide part 12 that has an outer diameter that is approximately equal to the inner diameter of the synthetic resin material piece 7. A material piece guide bag 11 is attached which forms an inner cavity 13 and is provided with an appropriate number of second material injection holes 14 communicating from the upper end surface to the inner cavity 13.
The upper mold 20 has an inner cavity that cooperates with the upper mold to form a molding cavity 18, and the upper mold 20 has a material injection recess 21 in its upper part and is combined with the intermediate mold 17. An appropriate number of first material injection holes 22 are provided to fill the material injection recess 21 and the molding cavity 18 when the material injection is performed. In order to maintain the concentricity of the bushings 3, metal ring guide protrusions 15 are appropriately arranged on the circumference.The bushing is manufactured using the above-mentioned mold as follows.

The material of the outer metal ring 1 and the material of the inner metal ring 3 are prepared in advance, and an unvulcanized rubber-like elastic material is prepared in an amount larger than that required to form the buffer member 0 material 2. Material piece 6
A synthetic resin material piece 7 made into a small pipe shape (compared to the size of the liner 4) is prepared, and the synthetic resin material piece 7 is inserted into the material piece guide portion 12 of the lower mold 10, and the inner tube is inserted. The raw materials for both outer metal rings 13 are placed in the molding cavity 18, the rubber-like elastic material piece 6 is placed in the material injection recess 21, the material injection means 25 is overlapped, and the mold is heated by heating means (not shown). 10, 17, 20 and material injection means 25
When the material injection means 25 is heated and pressurized to 0 by a pressure means (not shown), a part of the rubber-like elastic material piece 6 passes through the first material injection hole 22 and comes out, as shown in FIG. The other part of the rubber-like elastic material piece 6 passes through the second material injection hole 14 to inject synthetic resin material into the middle of the inner metal ring 1 and the inner metal ring 3 to form a buffer part 2. The synthetic resin material piece 7, which is guided into the inner cavity 13 formed between the piece 6 and the material piece guide shaft 11 and softened by heating, is expanded outward,
The molding of the bush 0 is completed by attaching it to the inner peripheral surface of the inner metal ring 3 to form the liner 4. After molding is completed, mold 1
0, 17, 20 and the material injection means are disassembled, the molded product is taken out, and predetermined processing is performed on both the inner and outer peripheral surfaces, both end surfaces, etc., to obtain the product. Since the bushing manufacturing method according to the present invention has the above-mentioned lateral formation requirements, the following effects are brought about.

The mold forms a cavity inside the synthetic resin material piece in addition to a first material injection hole that connects the molding cavity and the material injection cavity, and the cavity and the material injection hole are formed in the mold. Since a second material injection hole is provided for communicating with the injection cavity, a part of the rubber-like elastic material piece pressed by the material injection means is injected into the middle of both the inner and outer metal rings to form a buffer section. At the same time as forming the village, another part of the piece of rubber-like elastic material is guided inside the piece of synthetic resin material, and the pressure causes the piece of synthetic resin material to expand outwards and expand inside the inner metal ring. A bushing in which a cushioning member made of a rubber-like material is interposed between the inner and outer metal rings to form a liner by being attached to the peripheral surface, and a liner made of synthetic resin is attached to the inside of the inner metal ring. is easily manufactured with high precision.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing the structure of a bush that is a subject of the present invention, FIG. It is a sectional view showing the situation of implementation of the push manufacturing method. 1...Outer metal ring, 2...Buffer member,
3... Inner metal ring, 4... Liner, 6...
...Rubber-like elastic material piece, 7...Synthetic resin material piece, 10...
...Lower mold, 11...Material piece guide shaft, 12.
... Material piece guide part, 13 ... Inner cavity, 14
...Second material injection hole, 15...Protrusion for guiding metal ring, 17...Intermediate mold, 18...Molding cavity, 20...Upper Molding mold, 21...
... Material injection recess, 22 ... First material injection hole, 25 ... Material injection means. Register] Illustration 2, Illustration 3

Claims (1)

[Claims] 1. The outer metal ring 1 material, the inner metal ring 3 material, and the synthetic resin material piece 7 that is adhered to the inner peripheral surface of the inner metal ring 3 to form the liner 4 are placed into a molding cavity 18 and a material injection material. The material piece guide shaft 11 is provided with a recess 21 and forms an inner cavity 13 between the synthetic resin material piece 7 and the molding cavity 18 and the material injection recess 21. A first material injection hole 22 that communicates with the inner cavity 13 and a second material injection hole 14 that communicates the material injection recess 21 with each other.
The outer metal ring 1 and the outer metal ring 1 are arranged in the molding cavity 18 of the molding mold 10, 17, 20 provided with a material injection means 25 inserted into the material injection recess 21. A piece of rubber-like elastic material 6 forming the buffer member 2 disposed in the middle of the inner metal ring 3 is inserted into the material injection recess 21, and the material injection means 25 is pressed to release the rubber-like elastic material. A part of the elastic material piece 6 is inserted into the first material injection hole 2.
2 into the middle of both the inner and outer metal rings 1 and 3 to form the buffer member 2, and a part of the rubber-like elastic material piece 6 is poured into the inner cavity through the second material injection hole 14. 13, the synthetic resin material piece 7 is expanded outward and adhered to the inner peripheral surface of the inner metal ring 3 to form the liner 4. Method.