JPS6053213A - Composite bearing and method of producing same - Google Patents

Abstract

PURPOSE:To improve absorption of vibration, by providing on an inner circumferential surface a slide surface layer formed of thermoplastic synthetic resin having a superior self-lubricating property, providing an elastic intermediate layer outside the slide surface layer, and providing a reinforcing layer outside the elastic intermediate layer. CONSTITUTION:There are arranged a pressure roller 2, heat rollers 3 and 4 and guide roller 5 around a core bar 1. Winding of a fluoro resin sheet on the core bar 1 is carried out by forming the sheet having a length corresponding to a circular length of the core bar 1 and allowing one end of the sheet to coincide with the other end thereof, thereby forming a slide surface layer 6 on the core bar 1. Then, two layers of chloroprene rubber sheet on which adhesive is applied are wound around the slide surface layer 6 under pressure to form an elastic intermediate layer 7. Then, a resin cloth formed by treating a polyester fiber cloth substrate with phenol resin is wound around the elastic intermediate layer 7 with heat under pressure until a predetermined outside diameter is obtained to form a reinforcing layer 8.

Description

Detailed Description of the Invention The present invention comprises a sliding surface layer made of a thermoplastic synthetic resin material with excellent self-lubricating properties, an elastic intermediate layer made of a rubber-like elastic material, and a reinforcing layer made of resin cloth. 1. Conventionally, the sliding surface layer is made of a synthetic resin material and the sliding surface layer is made of a synthetic resin material. A manufacturing method for a composite bearing in which an elastic intermediate layer made of a rubber elastic body is arranged on the outside and a reinforcing layer made of a metal tube is arranged on the outside is as follows: The sliding surface layer is made of a synthetic resin (1'A) made of a cotton cloth base material impregnated with oil, and an elastic intermediate layer made of a rubber elastic material reinforced with cloth is arranged on the outside of the sliding surface layer. As a composite bearing with a reinforcing layer,
There is issue 097.

However, while these all have excellent vibration absorption properties, they are manufactured using molding molds, so in order to obtain composite bearings with arbitrary diameters, especially with different outer diameters, molds are required for each, and the former Since a metal tube is used as the reinforcing layer in this method, pressure is applied within a range that does not deform the metal tube during molding, which often causes problems between the sliding surface layer and the elastic intermediate layer, and between the elastic intermediate layer and the reinforcing layer. There is a problem that peeling occurs due to insufficient pressure.

Furthermore, even in the latter case, it is necessary to impregnate the sliding surface layer with oil. 2. It is necessary to apply several layers, and by impregnating the sliding surface layer with oil, it is necessary to impregnate the sliding surface layer with oil. The problem is that the adhesion with the elastic intermediate layer is weakened by the presence of oil and delamination occurs between them.

In view of these problems, the present invention makes use of the characteristic of having excellent vibration absorption properties, improves the sliding characteristics by using a thermoplastic synthetic resin material with self-lubricating properties for the sliding surface layer, and further improves the sliding characteristics. We have developed a technology to produce composite bearings in large quantities that do not cause peeling between layers, as well as a manufacturing method thereof, by manufacturing cylindrical laminated products by a roll forming method that does not use a molding die, and cutting them into predetermined lengths. This is a subject to be addressed.

In order to solve the above problems, the present invention provides the following technical means (
configuration and manufacturing method). That is, a sliding surface layer made of a sheet, tube, or woven fabric made of a thermoplastic synthetic resin material with excellent self-lubricating properties is provided on the inner peripheral surface, and the outer surface of the sliding surface layer is An elastic intermediate layer made of a sheet or a sheet of rubber-like elastic material is provided, and a reinforcing layer made of a resin cloth obtained by treating a cloth base material with a thermosetting resin is provided on the outside of the elastic intermediate layer. It adopts a composite configuration in which

In addition, these sheets, tubes, or woven fabrics made of thermoplastic synthetic resin material with adhesive treatment on the back are wrapped around a long core metal with the treated part outside, or are fitted into a cylinder of a certain length. A sheet or tube made of a comb-shaped elastic body is covered with pressure on the sliding surface layer to form an elastic intermediate layer, and a cloth base material is placed on the elastic intermediate layer. A reinforcing layer is formed by wrapping a resin cloth treated with a thermosetting synthetic resin in multiple layers to a predetermined diameter while heating and pressurizing it.1.Then, these are heated together with a core metal in an atmosphere heated to a predetermined temperature. The sliding surface layer, the elastic intermediate layer, and the reinforcing layer are bonded together, the reinforcing layer is cured, and the three are firmly integrated to form a cylindrical laminate molded product, and the cylindrical laminate molded product is This method involves removing the core metal and cutting it to a predetermined length to make a composite bearing.

By adopting the above means, the present invention has the following effects.

That is, by manufacturing a composite bearing from a cylindrical laminate molded product formed by a roll forming method, compared to a composite bearing obtained from a molded product using a molding die, the sliding surface layer, elastic intermediate layer, and reinforcement are The adhesive strength between the layers is increased, so that peeling does not occur and disturbances in these layers can be prevented.

In addition, by cutting the long cylindrical laminated molded product into a desired length, a large amount of composite bearings can be easily obtained, and by adjusting the number of winding layers of the reinforcing layer, Composite bearings with arbitrary outer diameter dimensions can be obtained.

Furthermore, by using a thermoplastic synthetic resin material with self-lubricating properties for the sliding surface layer, the sliding characteristics are improved.
Furthermore, due to the vibration absorption ability of the elastic intermediate layer, the bearing is extremely effective for use in special locations where vibration absorption is required.

Furthermore, since it has a laminated structure, it has ITI effects such as excellent mechanical strength.

Here, the sheet or cheap made of thermoplastic synthetic resin material used to constitute the sliding surface layer is preferably one made of fluororesin and polyamide resin, and the thin woven fabric is made of fluororesin fiber and aromatic polyamide fiber. It is preferable to use woven fabrics consisting of woven fabrics or other fibers such as cotton, polyester fibers, etc. When these are used in sheets and cheeses, they can achieve the desired +IQl+ Although it varies depending on the diameter of the receiver, those having a wall thickness of about 0.3 to 5 cm are usually used.Furthermore, unfilled commercially available sheets and tubes can be used; In order to improve wear resistance and load carrying capacity without sacrificing low friction properties, we use filler-containing sheets and chips containing solid lubricant powders such as graphite and molybdenum disulfide, soft metal powders, and inorganic powders. It is even more undesirable to use a

Furthermore, even in the case of using a woven fabric, it is a preferable embodiment to fill it with a solid lubricant during the period for the purpose of improving the sliding characteristics as in the above-mentioned sheets and tubes.

Note that the surface of these materials that is bonded to the elastic intermediate layer, so-called rubber-like elastic body, is subjected to an adhesive treatment, such as a fluorine-free treatment, in order to strengthen the adhesion between the two.

The sheets and tubes made of rubber-like elastic material used to constitute the elastic intermediate layer are made of chloroprene rubber,
Inprene rubber, nitrile-butadiene rubber, and styrene-butadiene rubber are all suitable materials.

Usually, a wall thickness of 1 to 5 mm is used because it is easy to handle, and the number of winding layers varies depending on the usage conditions, but as the number of layers increases, the vibration absorption ability increases. However, since the rigidity of the bearing is reduced, one to several layers are usually provided.

Furthermore, the resin cloth used to constitute the reinforcing layer may be a cloth made of polyester fibers, a blended knitted or mixed woven cloth made of polyester fibers and cotton fibers, a cotton cloth, glass fibers, asbestos fibers, carbon fibers, etc. It is preferable to use a cloth base material made of a cloth treated with a thermosetting synthetic resin such as a phenol resin, an epoxy resin, or a polyester resin.

Among these, polyester or blended or woven fabrics containing polyester have low hygroscopicity, so they hardly swell due to moisture absorption and have excellent dimensional stability as bearings.

Furthermore, since the heat shrinkage during heating and curing is large, compressive force is generated in the molded product, increasing the bonding force between the sliding surface layer, the elastic intermediate layer, and the reinforcing layer, and providing a dense molded product.

Furthermore, it is particularly preferred because it has various characteristics such as easy production of resin cloth and excellent moldability.

Hereinafter, the present invention will be explained in detail with reference to the drawings.

9- Fig. 1 shows the principle of the roll forming method used to manufacture the composite bearing of the present invention, in which 1 is a core bar, 2 is a pressure roller, 6.4 is a heating roller, and 5 is a guide roller. It is.

The core metal 1 is located in a position surrounded by these three rollers 2, 3, 4, and by applying rotational driving force to the core metal 1, the six rollers 2, 3, 4 come into contact with the rollers. (See the arrow in the figure).

Further, the outer diameter of the core metal 1 is the inner diameter of the composite bearing.

6 is a sliding surface layer constituting the composite bearing, 7 is an elastic intermediate layer, 8
is a reinforcing layer.

Next, regarding the manufacturing method of the composite bearing of the present invention, a fluororesin sheet is used for the sliding surface layer B, a chloroprene rubber sheet is used for the elastic intermediate layer 7, and a cloth base made of polyester fiber is used for the reinforcing layer 8. This will be explained in detail using an example using a resin cloth treated with phenol resin.

That is, after a fluororesin sheet with a thickness of 2 mm has been subjected to adhesive treatment (defluorination treatment) on one side (back side), it is wrapped one layer (-heavily) around the core metal 1 with the treated portion outside, and then a cylindrical slide is formed. A dynamic surface layer 6 is formed.

The sheet can be wound around the core metal 1 in the following two ways.

That is, the first method is to form a sheet according to the circumferential length of the core metal 1 and wrap it around the core metal 1 so that the edges match, and the second method is to form a sheet with a constant width. In this method, a sheet is formed into a shape, and the sheet is wound spirally around the core metal 1 so that the side edges match.

Further, when winding the sheet around the core metal 1, the sheet can be easily wrapped by heating the sheet (approximately 120° C.) to impart flexibility to the sheet.

Next, on this fluororesin sheet (sliding surface layer), two layers (double) of a sheet of 1-thickness glue and lower 2° rubber with 7 adhesives applied are applied (30 to 50 kg/cd). The elastic intermediate layer 7 is formed by winding the elastic layer 7.

After that, a resin cloth made of a polyester fiber cloth base material made of phenol resin was placed on top of the Chloroprey film sheet (elastic intermediate layer) under heat and pressure (130 to 180°C).

30 to 60 Kq/ca) The reinforcing layer 8 is formed by winding the reinforcing layer 8 in multiple layers until a predetermined outer diameter is obtained. Next, the molded product that has been rolled to a predetermined diameter is removed from the roll molding machine together with the core metal 1, and heated to a predetermined temperature, in other words, the curing temperature of the phenol resin (approximately 160 to 18
A heat treatment is performed in an atmosphere heated to 0° C.) to bond the sliding surface layer 6, the elastic intermediate layer 7, and the reinforcing layer 8, and to harden the reinforcing layer 8, thereby obtaining a cylindrical laminate molded product.

Although the heat treatment varies depending on the diameter of the bearing and the thickness of the reinforcing layer 8, it is usually carried out at a temperature of about 150° C. for about 4 hours.

Furthermore, processing the molded product in this way generates a compressive force in the radial direction due to the thermal expansion of the core metal 1 and the contraction accompanying the hardening of the molded product, especially the reinforcing layer 8. This has the effect of making the molded product denser, in other words, the effect of making the joint and integration of the molded product stronger.

The thus obtained cylindrical laminated molded product (length can be up to about 4 m) is cut to an appropriate length depending on the purpose, and the inner and outer diameters are cut according to the molded state or if necessary. Accordingly, it is possible to obtain a composite bearing in which a sliding surface layer 6 is provided on the inner peripheral surface, a reinforcing layer 8 is provided on the outer peripheral surface, and an elastic intermediate layer 7 is provided between the two. It is.

In this embodiment, the elastic intermediate layer 7 is wound around the sliding surface layer 6, and the reinforcing layer 8 is wound around the elastic intermediate layer 7. However, when the elastic intermediate layer 7 is composed of a sheet, , The sheet and the resin cloth forming the reinforcing layer 8 may be overlapped and wrapped around the sliding surface layer 6]:<, By adopting this embodiment, the elastic intermediate layer 7 can be easily formed. At the same time, winding can sometimes apply pressure evenly.

Furthermore, even when a material made from a woven fabric is used for the sliding surface layer 6, a composite bearing can be obtained by the same procedure as when using a material made from a sheet.
Even when using a material made of chives, the winding around the core bar 1 and the sliding surface layer 6 only requires the work of fitting the chives, and the rest is done in the same way to assemble the composite bearing. This is something that can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a principle diagram of the roll forming method used to manufacture the composite bearing of the present invention, FIG. 2 is a plan view showing the composite bearing of the present invention, and FIG. 3 is a sectional view thereof. 1: Core metal, 6: Sliding surface layer, 7: Elastic intermediate layer, 8: Reinforcement layer Patent applicant Unipla Co., Ltd. Oiles Industries Co., Ltd. 14-

Claims (1)

[Claims] 1) A sliding surface layer made of a sheet, tube, or woven fabric made of a thermoplastic synthetic resin material with excellent self-sliding properties is provided on the inner peripheral surface. An elastic intermediate layer made of a sheet or tube made of a rubber-like elastic material is provided on the outside of the sliding surface layer, and a cloth base material and a thermosetting synthetic resin are provided on the outside of the elastic intermediate layer. A reinforcing layer is provided, which is made of resin cloth treated with Composite bearing. 2), A), A piece of fabric made of a thermoplastic synthetic resin material whose back side has been adhesively treated, is wrapped around a long core bar with the treated part facing outward, or is fitted in a fixed manner. a step of forming a cylindrical sliding surface layer having a length; a step of pressurizing and covering the sliding surface layer with a sheet or a tube made of a rubber-like elastic material to form an elastic intermediate layer; , C), Step of forming a reinforcing layer by winding a resin cloth, which is a fabric base material treated with a thermosetting synthetic resin, on the elastic intermediate layer in multiple layers to a predetermined diameter while heating and pressurizing; 2); then, These are heat-treated together with the core metal in an atmosphere heated to a predetermined temperature, the sliding surface layer, the elastic intermediate layer, and the reinforcing layer are bonded together, and the reinforcing layer is hardened to firmly integrate the three into a cylindrical shape. A step of forming a laminate molded product; e) a step of removing the core metal from the cylindrical laminate molding and cutting it into a predetermined length to form a composite bearing; and a step of a) to e) above. A manufacturing method for composite bearings.