JPS6037415A - Composite-layered bearing and producing method thereof - Google Patents

Abstract

PURPOSE:To improve wear resistance and load resistance, by filling a resin composition containing tetrafluoroethylene resin in a void of a back plate constituted of a sheet metal such as steel and a porous sintered metal layer formed on the sheet metal, and forming a layer of the resin composition. CONSTITUTION:A porous sintered metal layer 2 is layered on a sheet metal 1 such as steel forming a back plate 4 with a void 3 formed therebetween, and a deposition layer 5 of a resin composition is formed on the porous sintered metal layer 2. A metal powder forming the porous sintered metal layer 2 is preferably a copper alloy powder of 100 mesh pass such as bronze. The porous sintered metal layer is required to have a fixed thickness and porosity. The resin composition contains a polyimide resin of addition polymerization type in addition to PTFE. This is the reason why there is created no gas in a polymerization mechanism, and addition polymerization may be conducted upon burning of PTFE after depositing the resin composition on the sintered metal layer to enhance a mechanical binding effect and increase a contact strength.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a multilayer bearing and a method for manufacturing the same.

More specifically, the present invention uses tetrafluoroethylene resin (P
It relates to a multi-layer bearing coated with a resin composition consisting of a mixture of TFE) and a polyimide resin, in particular in the form of a semi-solid paste moistened with a predetermined amount of volatile liquid. The resin composition is supplied onto the surface and pressurized by a roller to form an adhesion layer of the resin composition thereon, and then this is fired to efficiently obtain a desired multilayer bearing.

Conventionally, a multi-layer bearing in which a PTFE resin is coated on a steel backing plate provided with a porous sintered metal layer is disclosed in, for example, U.S. Pat. No. 26
89580 (1954), Japanese Patent Publication No. 31-2452, and Japanese Patent Publication No. 39-16950.

In these prior art multi-layer bearings, the resin layer is designed to prevent the flow of PTFE under load, and to improve the lack of load bearing capacity of PTFE.
It is generally applied to a length of about 10 mm, and is known to have a low coefficient of friction and improved load resistance under normal usage conditions, and to exhibit satisfactory performance in a fairly wide range of applications. There is.

However, when these multilayer bearings are used under medium to high speed conditions and in a high temperature atmosphere, they suffer from large wear, and the fact that the resin layer is thin is disadvantageous, resulting in unsatisfactory bearing life.

On the other hand, in order to solve the above-mentioned drawbacks of PTFE, methods are known in which various fillers are mixed into PTFE. Among them, US Pat. No. 3,652,409 (1972
).

This technology is based on aromatic tetracarboxylic acids (viromelic acid).
After curing the polyimide resin by condensation polymerization of diamine (toic acid) and diamine (bis(4-aminophenyl) ether) to make it insoluble and infusible, it is pulverized to form PT.
FE powder is mixed with 5 to 40 weight S'', especially 10 to 20 weight S'', and then molded and fired to form a solid product.

The frictional wear behavior of this solid as a sliding material is considerably improved compared to unfilled PTFE, but the solid's skeleton is formed of PTFE as a continuous phase, and polyimide resin Since it is dispersed in the form of powder, for example, the load resistance is not improved in any way when a fibrous filler is added.

The multilayer bearing of the present invention follows the technology of multilayer bearings such as the above-mentioned U.S. Pat. This is an improvement on the technology of Patent No. 3,652,409, and by improving and condensing these, we provide here a new multilayer bearing and its manufacturing method that improves each drawback and satisfies the following objectives. It is something.

The object of the present invention is to coat a porous welded metal layer on a thin plate of steel or the like with a resin composition made of a mixture of PTFE and addition polymerized polyimide resin powder.
The objective is to provide a multilayer bearing with low friction, excellent wear resistance, and load resistance.

Another object of the present invention is to provide a multilayer bearing that has excellent speed characteristics and can withstand use without slipping in a high temperature atmosphere.

Still another object of the present invention is to provide a multilayer bearing in which the adhesive layer made of a resin composition and the backing metal have high adhesion strength.

Still another object of the present invention is to provide a method for manufacturing a multilayer bearing in which the resin adhesion layer is formed thick enough to be cut using a knife.

Still another object of the present invention is to provide a manufacturing method for efficiently obtaining such a multilayer bearing.The back metal used in the present invention is a rolled individual plate for general structure. Depending on the application, other steel plates or metal plates other than those made of steel can also be used61.

In the present invention, a continuous strip that is coiled and provided as a hoop material is used, but it is not necessarily limited to a continuous strip, and strips cut to an appropriate length can also be used. . It is preferable to use copper-plated strips for improving corrosion resistance.

The metal powder that forms the porous sintered metal layer is copper alloy powder, such as bronze, lead bronze, or phosphor bronze, which has excellent friction and wear characteristics and can pass through a pot of approximately 100 meshes. Depending on the situation, powders other than copper alloys such as aluminum alloys and iron may also be used.

The particle form of this metal powder is preferably lumpy or irregularly shaped, and the porous sintered metal layer made of spherical powder, which is said to be preferable for the multilayer bearings related to the prior art described above, is has a weak anchoring effect and is not preferred as a metal powder used in the multilayer bearing of the present invention.

This porous sintered metal layer must be firmly bonded to the alloy powder and the metal piece, and must have a certain thickness and the required degree of multiplicity.

The thickness of this metal layer is preferably approximately 0.15 to 0.40 mm, particularly 02 to 0.3 mm, and the porosity is approximately 10 mm or more, particularly 15 mm.
~40 volumes is recommended.

If the thickness of the metal layer is too large, the voids will be crushed and warped by the roll of the roller when applying the resin composition, making it difficult to impregnate the resin. Also, if it is too thin, the anchoring effect will be poor [7.

Porosity likewise influences the degree of resin impregnation and influences the anchoring effect.

The resin composition of the present invention to be applied to the back metal is particularly PTF.
It has a low friction coefficient unique to E, and not only has the drawback of causing flow under load been improved without almost impairing this property, but also has improved toughness.
As a result, wear resistant.

Improved load bearing capacity.

Such characteristics are achieved by applying a resin composition made by adding a certain amount of polyimide resin, especially addition polymerized polyimide resin powder in the present invention, to PTFE on the backing metal, then firing the PTFE and forming the polyimide resin. By adopting a method of accelerating the curing of the resin, we were able to make a significant improvement.

PTFE is used in the form of aqueous disbergeron.

For example, Mitsui Fluorochemical Co., Ltd.'s solid content 64 weight Ji9
No. 6' PTFE42 JDisverge Environne (trade name) can be mentioned as a preferable addition polymerization type polyimide resin, which is supplied by Loos-Boulin under the trade name "Kelimide" as a molding compound interbiotic resin. Polyamino bismaleimide is preferred.

This resin has the following chemical formula and is a thermosetting polyimide resin produced by addition polymerization of maleic anhydride and diaminodiphenylmethane.

9-Here, polyimide resins produced by condensation polymerization of aromatic tetracarboxylic acid (pyromellit #) and aromatic diamine [bis(4-minophenyl) ether] mentioned as prior art, such as "Besbel 1" manufactured by Depon Co., Ltd. Although the product name (trade name) has the following chemical formula, it is excluded from the present invention.

The polyimide resin used in condensation molds has better performance than addition polymerized polyimide resins, but since it generates gas during curing, it must be blended with PTFE to adhere to the backing metal. In the present invention, which employs a step of coating the film and then baking and hardening it, it not only tends to cause blistering and cracking of the film, but also prevents the film from adhering to the backing metal! !
There are harmful effects such as a decrease in the i degree.

In order to avoid such disadvantages, if the above-mentioned resin composition is to be used as a multi-layer bearing, the polyimide resin should be heated and cured to make it insoluble and infusible before blending, as described in Section 10. The finely ground material is then made into PTF.
The method would be to mix it with the E powder to obtain a resin composition, apply it to the back metal, and proceed with the firing of the PTFE.

Even if this method were to be applied to multilayer bearings, the processing steps of "heat curing" and "fine pulverization" would be increased by two steps, but the PTF by adding this polyimide resin would be
There is no particular improvement in the E coating.

The reason why we chose an addition polymerization type polyimide resin as the polyimide resin used in the present invention is that it does not generate gas due to its polymerization mechanism, and it undergoes addition polymerization during firing of the PTFE after it is added to the PTFE and adhered to the backing metal. In addition to the mechanical bonding (anchoring effect) of the resin composition to the backing metal, the adhesive effect of the polyimide resin is added, resulting in a multilayer structure with high adhesion strength and sufficient modification of the coating itself. This is because bearings can be obtained.゛The present inventors cut a slit in the resin layer (thickness: 0.1 mm) of the obtained multi-layer board to reach the backing metal, and made the radius of curvature with the slit portion on the outside to be 2.5 mm. A test piece with a slit at the top of the fold was obtained.

In each test piece, observe the knots in the slit part, and then use a jig to pinch the resin-covered gauze in the slit part and apply peeling force in the folding direction to prevent the bonding from breaking. We then measured how much the virus would peel off from the hidden funds.

It was almost impossible to peel off the tape according to the present invention, and the tape was broken when attached and removed without peeling.

On the other hand, when using polyimide resin with a condensed heavy mold as described above, there was no peeling at the top of the bend, but the peeling occurred 2 to 3 times out of 10 when peeled off. , there was peeling of 3-4 mm.

This is considered to be because the attachment/detachment according to the present invention not only has the anchoring effect of the resin but also has the adhesive effect of the polyimide resin, resulting in improved adhesion strength.

If necessary, a lubricating filler or a reinforcing filler can be added to the resin composition of the present invention by cooling to an extent that does not interfere with the adhesion operation.

These fillers do not decompose or change in quality at the firing temperature of the resin, and examples include finely powdered graphite, metal sulfides, boron nitride, soft metals, and inorganic fiber fine powder. can.

When applying the resin composition of the present invention to the back metal, in order to fill the porous sintered metal layer (anchoring) and to obtain a uniform coating film on the metal layer, the resin composition is It needs to be a fine powder, and it needs to have fluidity.

The present inventors added addition polymerization type YJR IJ imide resin powder to a PTFg aqueous disverge bottle, stirred the whole thing to mix them uniformly, and added [stirring] to the aqueous disverge bottle. We decided to coagulate both of them to obtain a semi-solid yeast by utilizing the cohesive property of the solid content, and use this to adhere to the back metal.

This substance is pale yellow and oval-shaped, and can be deformed into any shape by applying external force, and can spread into 13 cases.

However, if external forces such as stirring, kneading, and compression are repeatedly applied to this paste, the water will eventually separate and the paste will become wet and cotton-like (fibrosis of PTFE fine powder), resulting in extremely poor formability. Since such a flocculent material can no longer be used as the adhesive resin of the present invention, special care must be taken in preparing the paste.

In general, the adhesion of this semi-solid paste to the backing metal, in particular the filling into the porous sintered metal layer and the ability to spread on the metal layer, are greatly affected! Causes interact.

According to the experiments conducted by the present inventors, the factors attributable to the semi-solid paste are: 1) the size of the particles that make up the solid content, 2) the amount of volatile matter (liquid) contained in the paste, and 2) the volatile content in the above. Type, ■ PTF'E component 11 in the paste & degree of fibrosis, ■
Examples include the presence or absence of surfactant in the paste and its amount, ■ the proportion of polyimide resin in the paste, -14=, etc. As already mentioned, the main points related to the backing metal used are porous sintered Examples include the shape of the metal particles in the metal layer and the thickness of the metal layer.

P in the PTFE aqueous dispersion barrier used in the present invention
The TFE particles have a particle size of approximately 10 to 1 micron, and the PTFE solid content concentration is approximately 30
~60% by weight.

If the particle size of the PTFE particles is within this range, the porous sintered metal layer described above can be sufficiently filled even after the PTFE particles are made into a paste.

On the other hand, the addition polymerization type polyimide resin powder used in the present invention is a powder that passes approximately 150 meshes, and P
Although the average particle size is quite large compared to TFE particles, microscopic observation of the cross section of the multilayer plate shows that the small particle size is filled together with PTFE into the voids of the metal layer. It has become clear.

An organic solvent is added to the agglomerate obtained by mixing addition polymerized polyimide resin powder into PTFE aqueous disbarge and agglomerating the two, and stirring again to form a paste in which the solvent is uniformly mixed. do.

The addition of an organic solvent provides the resulting paste with improved spreadability and improved filling into the porous sintered metal layer.

Regarding this organic solvent, the present inventors conducted a divine experiment in Yuken, and the organic solvent normally used in the production of this paste,
-W revealed that aromatic hydrocarbons, aliphatic swelling hydrogen, halogenated hydrocarbons, etc. are not suitable.

In other words, when these solvents are used, the i+F, spreadability, and impregnation properties of the resulting paste are
7, there were no problems, but dry cracks tend to occur when drying the attachment and detachment, and once dry cracks occur, the dry cracks must be re-pressed by the roller after drying, or by the roller during heating after firing after re-pressing. Even when rolled, the dry cracks often remain on the resin surface as eaves, making it extremely difficult to form a healthy coating.

This is mainly due to the fact that the resin attachment/detachment of the present invention is thicker, on the order of 10-1-1 mm compared to the conventional one with a thickness on the order of 10ζ mm, and the addition of polyimide resin also has an effect. It was found that it was causing

The present inventors have discovered that water-soluble organic solvents, particularly acetone,
Ketones such as ethyl methyl ketone, alcohols such as methanol, ethanol, propatool, ethers such as ethyl methyl ether, ethyl propyl ether, ethylene glycol monomethyl ether and monoethyl ether, and esters such as methyl acetate. This problem was solved by using.

In other words, the addition of these water-soluble organic solvents can reduce the occurrence of dry cracks during drying of the adherend and remover compared to the addition of hydrocarbon solvents, and even if small dry cracks occur. However, by applying roller pressure during heating after drying, a sound film with no flaws could be obtained, and this soundness was maintained even after firing.

It is important that the amount of gold gauze, which is a volatile liquid consisting of water and an organic solvent, in the conopaste be 50 to 75% by weight.

If the amount of volatile liquid is small, spreadability is poor and impregnation into the porous sintered metal layer tends to be uneven. In addition, if there is too much volatile liquid, there will be a lot of separation liquid flowing out and gulping, which will not only make it difficult to perform the adhesion work, but also impair the uniformity of adhesion and removal and deteriorate the adhesion strength.

The proportion of organic solvent in the volatile liquid is 8-30%. If the proportion of organic solvent is too small, the effect of its addition will not be apparent, and even if it is added in excess of 30% by weight, the effect will reach saturation and will not change much.

If the paste is continued to be stirred or crushed under pressure, the volatile liquid will separate and the paste will become hard (fibrillation progresses and become wet and cotton-like), significantly impairing its spreadability. As already mentioned.

Therefore, when stirring the mixture of the PTFE aqueous dispersion and polyimide resin powder or after adding the organic solvent, it is important to do it quickly so as to avoid kneading as much as possible.

In order to improve the dispersibility and stability of the PTFE particles, the PTFE aqueous dispersion solution contains a surfactant in an amount of about 96 in the commercial quantity. Normally, non-ionic or anionic activators are used, and especially for high-grade disbarges with a high solids content, a few percent by weight of activator is used, but if the solids content is 30% by weight, In cases where the concentration is relatively low, this surfactant is often not used or only a small amount is added.

When preparing a paste by agglomerating the disverge blind particles by stirring, it is easier to agglomerate if there is no or a small amount of surfactant added, which is advantageous for paste preparation, but on the other hand, the spreadability of the paste is is inferior,
It becomes extremely difficult to obtain a satisfactory resin adhesion layer.

Therefore, it is essential that the paste contains at least 0.5 phase part 9 or more, especially 1 to 3 parts 11 parts of surfactant.

The surfactant may be added alone, or the amount of the surfactant can be adjusted by mixing with a high concentration PTFE disbarge containing a large amount of surfactant.

For example, Mitsui Fluorochemical Co., Ltd.'s PTF'E30 J
Dispersion (trade name) contains 60% by weight of solids and 6% by weight of surfactant, and it is effective to use this product mixed with the PTFE42J dispersion mentioned above.

The presence of the polyimide resin component in the paste tends to impair the spreadability of the paste, but the degree of this is slight compared to the volatile liquid contained in the paste and the effects of PTFE fiberization.

Therefore, when the proportion of polyimide resin in the paste solid content takes the upper limit (40 weight 96),
A slight increase in the content of volatile liquid or the amount of surfactant added can be sufficient to deal with this problem.

In the present invention, -, t'- on the backing metal mentioned above, t Mi'J
In order to obtain a multi-layer bearing with a resin adhesion layer 1 meter thick, first apply the IB-fed paste on the backing metal with a roller (2 to 3.5) to obtain a thickness of 1.5 mm. Put it on.

Next, the back metal coated with the paste is heated to a temperature of 200 to 250°C and held for several minutes to evaporate the volatile liquid, and then the dried adhered layer is heated to a predetermined thickness t using a roller. Apply pressure with a roller. The pressure at this time reaches approximately 300 to 600 degrees, and then the whole is introduced into the heating furnace and heated at a temperature of 360 to 380 degrees Celsius for several minutes to more than 10 minutes to proceed with firing, and then the pressure increases from the furnace. Take it out and press it again with a roller. This roller pressure is 10 to 10
(After adjusting the size, which is used to adjust the variation in dimensions in the millimeter range, the front metal with this resin layer is cooled, and then a straightening roller is used to correct the waviness of the back metal as necessary.) After cutting the O2 multilayer board into an appropriate size, it can be used as a sliding board in the flat state, or it can be bent into a round shape and used as a cylindrical rolling bush. − Can be done.

An example of a method for manufacturing a multilayer board will be described below.

P containing solid content 34 times if, surfactant 1.35 times 9 times
PT containing 1,100 grams of TFE aqueous disbarge solution with solids content of 60 m %j 56 and surfactant 60%
745 g of FE aqueous disverge was added, and then addition polymerization type polyimide resin powder (trade name "Kelimide" J) was added.
Add 100g of K 1050) to make the total about 30g
The mixture was stirred for seconds (300 rotations for 4 r# minutes) to agglomerate the solid content.

250 milliliters (197 grams) of acetone was added to this aggregate and stirred in the same manner for about 20 seconds so that the whole was mixed uniformly to obtain a semi-solid paste.

The proportions of each component in this paste are as shown in Table 1.

Table 1 22 - On the other hand, 90
The backing metal was prepared by sintering a bronze paste powder consisting of copper-10tin in a dose of 17. The thickness of the porous sintered total pressure layer of this backing metal is 0.25
mm, the porosity (porosity) is approximately 30 by volume.

The above-mentioned paste was applied onto the porous welded metal layer of the back metal and rolled with a roller to form a paste-covered layer approximately 0.5 mm thick.

This was placed in a hot air drying oven adjusted to a temperature of 200±5°C and dried for about 5 minutes to remove the volatile liquid in the paste [7].

Next, this was rolled with a roller to form an IJJI adhesion layer of 0.22 mm, and then heated in an atmosphere of 365±3°C! φ formation was performed for 6 minutes in a heating furnace adjusted to the desired temperature.
Melt hardening of the VI composition proceeded.

Then, after applying pressure with a size adjusting roller while hot, the product was cooled by spraying with cold water to obtain a multilayer board with a resin adhesion layer having a thickness of 021±0.01 mm IJ meters.

The thus obtained multilayer plate was subjected to a friction and wear test under the following conditions, and the results are shown in Table 2.

Trial translation conditions: ■Test piece A flat multi-layer plate with a v1 of 35 mm.

■Aisen old.

The sliding contact surface was an end face of a pusher made of mechanical structural carbon steel (845C) with an inner diameter of 20 mm, an outer diameter of 25.6 mm, and a height of 25 mm.

■Sliding speed I number 80 meters per minute (approximately 1117 revolutions/minute).

■Load: 4ft force load of 15kg per square centimeter.

■Ambient temperature IW ωRoom temperature, 0100°C ■Test time 8 hours Table 2 Comparison section (4) is a resin layer coated with unfilled PTFE to a thickness of 0.025 mm in the same manner as in the above example. and comparison section (Bl is U.S. Pat. No. 3652)
A resin composition corresponding to No. 409 was applied to a resin layer thickness of 0.21-±0.01 mm in the same manner as in the above-mentioned examples.

However, for the polyimide resin in comparative part (B), hardened fine powder obtained by crushing a condensation polymerization type polyimide resin molded product was added to PTFE aqueous disverge solution (total solid content °
It was used at a weight of 20% (96).

As can be seen from the table, there is no difference in performance between the comparative part (...) and the product of the present invention in the case of Zai-on. In addition, the comparison part (4) has a large wear loss (the porous sintered metal layer is partially exposed), but
The coefficient of friction was rather small.

25- However, at an ambient temperature of 100°C, the comparative part (4
), the t111 layer of the tree was almost worn out (the wear also extended to the monolithic sintered metal layer, and although the wear was large, there was no noticeable increase in the wear coefficient, and the wear coefficient was about 020 It is thought that the PTFE sprouts that showed this value were completely sintered within the porous sintering total pressure of 1<7i'.

The product of the present invention exhibits its effects in such a high-temperature atmosphere, and the friction coefficient is rather small compared to the value at high temperatures, although the worn area is slightly larger. Frozen comparison section (
Contrasting with the behavior of Bl, Mokyuaki's product is Mo! 1′,′@1
The rate of increase is extremely small. This is thought to be because in the product of the present invention, when the deposited resin composition is fired, the polyimide resin is cured in addition to the PTFE, so that the deposited resin layer is sufficiently strengthened.

FIG. 1 is a manufacturing process diagram of the first layer board of the present invention. The surfactant may be added before stirring to obtain solid aggregates, or may be added together with the organic solvent after obtaining aggregates.

Figure 2 is an enlarged view of the obtained multilayer board, +112
61 is a thin plate such as steel that makes up the back metal (4), (2) is a thin plate -
A polylithic welded metal layer is formed at H, (3) is the void of the metal layer, and (5) is an adhesion layer of the resin composition.

FIG. 3 is an explanatory diagram showing the method for manufacturing a multilayer board of the present invention.

(6) is a hoop material made by winding the back metal (4) into a coil, +7
1 +71 is the guide roller, (8) is the hopper, and (
9) is a paste of a resin composition.

on on is a pressure roller that rolls and coats the supplied paste (9) on the backing metal to a uniform thickness. In this process, the resin coating thickness required for '@P products is 2-3
．． Deposited 5 times thicker.

Most of the resin filling into the voids (3) of the multi-porous sintered metal layer progresses in this step.

(Ill is a hot air drying oven, and the atmospheric temperature is controlled to be approximately 200 to 250°C. When the paste passes through this hot air drying oven, most of the volatile matter in the paste is removed.

(I'a (12 is a dimensioning pressure roller.
[Press f. In this step, the above-mentioned sky-1
3+ is supplementally filled with resin, and the filling becomes solid.

The old one was a 48111FT heating furnace, and the ambient temperature was adjusted to approximately 360-380°C. Firing and hardening are completed by passing through the furnace, which takes several minutes to more than 10 minutes.

na oa is a size adjustment roller, 1o' to 1 of the resin layer
Fine adjustment of the thickness in the range of 0-2 mm is carried out while hot.

The temperature of this roller is controlled by passing a refrigerant inside.

051 is a cooling device that uses cold water spray or the like to cool the backing metal to approximately room temperature.

(161 is a straightening roller, which corrects slight undulations on the back metal.

+171 +171 is a guide roller, and 0 seconds is a coiler, and the obtained multilayer board is wound up.

In the present invention, PTFE can be used without significantly increasing the friction coefficient.
Modification of the adhered resin layer has been achieved by taking advantage of its low friction properties.

Even if the thickness of the resin adhesion layer is thicker on the order of 10 to 1ζ mm compared to the conventional thickness of on the order of 10 mm, the resin layer does not sag. This also makes it possible to adjust the dimensions of the inner diameter surface on which the resin layer is present by machining with a knife, especially when used as a wrapper.

What about the clearance with the other shaft? When the need for A adjustment arises,
Although it is impossible to adjust the dimensions by machining with a knife with conventional coatings with a thickness of about 10 mm, this is possible with the present invention.

In addition, when two or more multi-layer wrappers are embedded and molded in reinforced plastic to form a single structural part and used in combination with a mating shaft, the molding conditions and mold design must be carefully selected. However, the distance between the centers of the pusher holes or the parallelism is likely to be distorted.

In such a case, if the resin adhesion layer of the push-fit has the thickness mentioned above, this part is used as a resin layer with an allowance and the diameter is enlarged by machining with a knife to adjust the E-axis deviation29- and at the same time, it is attached to the mating shaft. It can be used with an appropriate clearance.

Therefore, the multilayer bearing of the present invention has a resin adhesion layer of 10 to 10.
1 (can be used as it is with a thickness of 1.0 mm, or can be used with a thickness of 10 to 10 mm. By the way, polyimide resin makes it possible to use P T
Ii'E series multi-layer bearings have extremely high wear resistance when the resin coating thickness is on the order of 10 mm. Not only does it have improved load capacity, but it also has excellent speed characteristics, and it can be used extremely effectively without lubrication, especially in a high 1J atmosphere.

[Brief explanation of the drawing]

FIG. 1 is a manufacturing process diagram of a multilayer plate used in the multilayer bearing of the present invention, and FIG. 2 is an enlarged sectional view of the obtained multilayer plate. FIG. 6 is an explanatory diagram showing the method for manufacturing a multilayer board of the present invention. 30-0) Thin plate such as steel, 12) Porous sintered metal layer, (4) Back metal, (5) Adhesive layer of resin composition, (6) Hoop material, (8
) Bot/knee, (91 Resin A compound paste, sequential pressure roller, 011 Kunpu drying oven, Q"A Q2 dimensioning pressure roller, heavy heating oven, n4te41 dimension adjustment roller,
o9 cooling device, QIW straightening roller, aS coiler Patent applicant Oiles Industries Co., Ltd. 31-

Claims (1)

[Scope of Claims] +11 (a) A resin composition comprising a tetrafluorinated ethylene resin of 60 to 90 parts by volume 19 and an addition polymerization type polyimide resin of 10 to 30 parts by volume. (b) A backing plate in which a porous sintered metal layer made of lumpy or irregularly shaped metal powder is provided on a thin plate of steel or the like. A multilayer bearing in which the resin composition is filled in gaps in a metal layer of the back metal layer and is adhered onto the metal layer. +21 (a) Addition-polymerized polyimide resin powder is added to the tetrafluorinated ethylene resin aqueous dispersion method in such a manner that the imide resin weighs 10 to 40% by weight relative to the solid content, and then stirred and mixed to reduce the solid content. The process of agglomerating. (b) A water-soluble organic solvent is added to the obtained aggregate and stirred, so that the proportion of the volatile liquid consisting of water and the organic solvent in the Dis Virgine is 50 to 75% by weight, and the volatile liquid is A process of obtaining a semi-solid paste in which the proportion of the organic solvent in the liquid is 10 to 30 by volume (9). A step of dispensing the back metal provided above and supplying the semi-solid paste onto the metal layer of the back metal. 2) Rolling the supplied semi-solid paste with a roller to fill the voids in the metal layer and The process of depositing onto a metal layer. (e) Drying the resin adhesion layer to remove volatile liquid. (f) Next, a step of applying roller pressure to the desired coating thickness. (g) Next, a step of heating and melting the resin layer. (g) Next, the fired resin layer is pressed with a roller while heated to finely adjust the adhesion thickness. A method for manufacturing a multilayer bearing on which a resin composition consisting of 60 to 90 weight 9' of tetrafluorinated ethylene resin and 10 to 40 weight of addition polymerization type polyimide resin is adhered by the above steps.