JPS6143556A - Manufacture of composite sliding material - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a composite sliding material comprising a backing metal, a sintered layer on the backing metal, and a low-friction resin layer provided on the sintered layer.

BACKGROUND ART Conventionally, a composite sliding material comprising a back metal made of a steel plate, one or more sintered layers sintered to the back metal H, and a low friction resin layer provided on the sintered layer is well known. To manufacture such composite sliding materials, usually one or more layers of sintered material such as copper powder or copper-based alloy powder are spread and sintered on the backing metal, and the required materials are spread on this sintered layer. After applying a thin layer of a mixed solution of a low-friction resin material consisting of the following components and impregnating the above-mentioned sintered layer with the mixed solution, the mixed solution is heated and dried and fired to form a low-friction resin layer on the above-mentioned sintered layer. We are trying to form a

However, with such conventional manufacturing methods.

Since a liquid mixture made of low-friction resin material is applied thinly onto the sintered layer and impregnated into the sintered layer, the thickness of the low-friction resin layer can be adjusted to the required thickness. In particular, it has been extremely difficult to reduce the thickness of the low-friction resin layer to a thickness of about 30 tm or less.

In view of these circumstances, the present invention has been developed by forming the low-friction resin layer to be formed on the sintered layer in advance as a sheet, and pressing this sheet onto the sintered layer. E: To provide a method for manufacturing a composite sliding material that allows the thickness of a low-friction resin layer to be easily adjusted to a required thickness by coating the material, and also allows the low-friction resin layer to be made thinner. It is something.

The present invention will be described below with reference to the illustrated embodiment. In FIG. 1, reference numeral 1 denotes a low-friction resin material made of necessary components stored in a hopper 2. In FIG. As this low friction resin material 1,
For example, it is desirable to add a hard material such as alumina to a dispersion made of a fluorocarbon resin material, and further add a low melting point metal such as lead and/or a solid lubricant such as molybdenum disulfide.

When the components of the low-friction resin material 1 are mixed and stirred, the low-friction resin material 1 is in the state of a mixed liquid, and in conventional manufacturing methods, the mixed liquid in this state is thinly applied onto the sintered layer. Then, the mixed liquid is impregnated into the sintered layer.

However, in this example, after blending each component of the low-friction resin material 1 and thoroughly stirring the mixture to about 40 to 50 degrees, the organic solvent is added and further stirred for several minutes to form the mixed liquid. It is turning into slurry. The low-friction resin material 1 that has been made into a slurry is put into the hopper z, and the low-friction resin material 1 in the hopper z is pressed into a low-friction resin sheet with a thickness of, for example, 1 inch by a pair of extrusion rolls 3 from the bottom of the hopper z. 4. I try to extrude it while molding it. ・Above la
In the illustrated embodiment, the low friction resin sheet 4 having a thickness of
The material is rolled to a thickness of 0.5 mm by passing through a rolling roll 5, further rolled to a thickness of 0.1 mm by a second rolling roll 6, and then wound onto a winding roll 7. During the above rolling, each rolling roll 5.6 is heated at a temperature of 60 to 80°C.
The low-friction resin sheet 4 is heated at the same time as the above-mentioned rolling.
This allows excess moisture to be removed by evaporation.

In FIG. 2, reference numeral 8 denotes the above-mentioned low-friction resin sheet wound around the take-up reroll 7, and 9 denotes a back metal 10 and one or more sintered layers 11 sintered on the back metal 10.
At the same time, the low-friction resin sheet 8 is pulled out from one winding roll 7, and the composite material 9 is pulled out from the other winding roll 12. I try to pull it out with it facing towards the side.

The low-friction resin sheet 8 and the composite material 9 pulled out from the take-up rerolls 7 and 12 are passed between a pair of press rolls 13 in an overlapping state, and the press rolls 13 press them together to bring them into close contact. That's what I do. At this time, the low-friction resin sheet 8 is deformed under pressure by the pressure roll 13, and a part of it is press-fitted into the pores of the sintered layer 11, so that the required adhesion strength can be ensured. can.

The composite sliding material 14 thus formed in close contact with each other is then dried in a drying oven 15 at a temperature of 60 to 80°C for 2 to 3 minutes, and further in a heating oven 16 at a temperature of 400 to 80°C.
The required composite sliding material 17 is completed by firing at a temperature of 450° C. for 10 minutes. This composite sliding material 17 is then wound up by a winding roll 1B.

In this way, in this embodiment, the low-friction resin sheet 8 of the required thickness is brought into close contact with the sintered layer 11 of the composite material 9 by pressure, so that the low-friction resin sheet 8 is Control of the thickness is much easier than in the conventional manufacturing method in which a liquid mixture is applied onto the sintered layer, and furthermore, it is possible to reduce the thickness to about 51 Lm.

In addition, in this example, after the low-friction resin material in the state of a mixed liquid is slurried, the low-friction resin material l
is dried with two sets of rolling rolls 5.6 to produce the low-friction resin sheet 8, and further dried after the low-friction resin sheet 1.8 and the composite material 9 are pressed together. Compared to the conventional method of drying a mixed liquid and immediately manufacturing a composite sliding material as a finished product, there is no need to evaporate and dry a large amount of water from the low-friction resin material in the mixed liquid state at once. Therefore, it is possible to effectively prevent cracks and avatars from occurring in the low-friction resin layer.

Furthermore, the above-mentioned slurry-formed low-friction resin material N: 11
Since the low-friction resin sheet 4 is formed from the sintered layer, the amount of metal additives such as alumina and lead in the low-friction resin material l is lower than when the mixed liquid is applied onto the sintered layer. It also has the advantage of being less likely to segregate and being uniformly dispersed, resulting in stable sliding properties.

As described above, according to the present invention, it is possible to easily adjust the thickness of the low-friction resin layer provided on the sintered layer to the required thickness, and it is also possible to reduce the thickness of the layer. .

[Brief explanation of the drawing]

1 and 2 show an embodiment of the present invention, FIG. 1 is a schematic side view of a manufacturing apparatus for manufacturing a low-friction resin sheet 8 that is pressed onto a sintered layer ll, and FIG. 1 is a schematic side view of a manufacturing apparatus for manufacturing a composite sliding material 17 according to the present invention by press-contacting the low-friction resin sheet 8 manufactured in FIG. 1 onto a sintered layer ll of a composite material 9. FIG. 1...Low friction resin material 8...Low friction resin sheet 9
... Composite material 10 ... Back metal 11 ... Sintered layer 13 ... Pressure roll 17 ... Composite sliding material

Claims (3)

[Claims] (1) A method for manufacturing a composite sliding material comprising a backing metal, one or more sintered layers sintered on the backing metal, and a low-friction resin layer provided on the sintered layer, comprising: One or more sintered layers are formed on the back metal, and a sheet of a low-friction resin layer is separately formed on the sintered layer, and then a low-friction resin layer is formed on the sintered layer. A method for manufacturing a composite sliding material, characterized by press-welding sheets of resin layers to bring them into close contact. (2) The method for manufacturing a composite sliding material according to claim 1, wherein the sheet of the low-friction resin layer is extruded from the bottom of a hopper using a pair of extrusion rolls. (3) The method for manufacturing a composite sliding material according to claim 1 or 2, characterized in that the sheet of the low-friction resin layer is rolled by a rolling roll heated to 60 to 80°C.