JPS5947081B2 - Track sheet material for planing vehicles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a planing track material for a planing vehicle, and particularly to a planing track sheet material that has excellent wear resistance and a small coefficient of wear even when lubricating oil is not supplied from the outside.

Conventionally, as a guide track for slidingly supporting a rail vehicle driven by a 9-near motor, a first component selected from materials such as iron, copper, nickel, and titanium, which accounts for 50 to 90% by weight, is used on the track surface, and a first component selected from materials such as iron, copper, nickel, and titanium, and chromium, molybdenum, Consists of a second component selected from materials such as tin, zinc, and antimony and having a weight ratio of 1 to 40, and a third component selected from materials such as graphite, lead, and ethylene chloride resin and having a weight ratio of 1 to 10. It has been proposed that a metal material layer is formed on the surface of a base metal by thermal spraying.

A sliding track made of such metal materials has the problem of having various effects on the strong magnetic field of the linear motor propulsion device, complicating the control system, and increasing the manufacturing cost of the track. .

In order to solve this problem, the present inventor first developed a synthetic material that is preferably laid on the concrete track surface and is easy to mold, so as not to affect the magnetic field of the linear motor propulsion device. A sheet-shaped sliding track mainly made of resin was proposed in Japanese Patent Application No. 51-64469.

That is, the slide track of this prior art is constructed by laying a vibration-absorbing mat made of fibrous material impregnated with lubricant or rubber or synthetic resin material with open cells on the flat concrete foundation surface, and At least one of polyimide resin, polybenzimidazole resin, and aromatic polysulfone resin, and at least one of tetrafluoroethylene resin and graphite are added to a woven fabric made of nylon, 47tethylene resin, or carbon as a fiber material. A sliding plate impregnated with one of the above-mentioned types and molded under heat and pressure is laid on the vibration absorbing mat, and a large number of small holes are bored in the sliding plate at predetermined intervals so that when a vehicle passes, The lubricant in the mat can seep out onto the surface of the multi-plate through the small holes.

However, the above-mentioned sliding trajectory changes over a certain period of time.
There are practical problems in that it is necessary to inject lubricating oil into the interior of the vibration absorbing mat, and a large amount of expensive polyimide resin is required.

Therefore, the present inventor made further improvements and was able to obtain a track material that has extremely low slip resistance and high temperature resistance even in a dry, non-lubricated state.

Compared to the above-mentioned track materials, the track material according to the present invention uses less expensive resin materials such as aromatic polysulfone resin, polyimide resin, and tetrafluoroethylene resin.
It also has the advantage of being inexpensive to manufacture.

That is, the track material of the present invention is produced by impregnating a woven fabric made of glass fiber or graphite fiber as a reinforcing core with a mixture of aromatic polyester resin, graphite powder or molybdenum dioxide powder, phenol resin liquid, and paraffin wax, and then heating it. It is pressed into a sheet shape.

Among the above-mentioned runway materials, glass fibers and graphite fibers have the tensile strength and compressive strength of sheet materials, and are stable against frictional heat to prevent loosening of bonds between other materials.

In this invention, glass fiber or carbon fiber woven fabric such as plain weave, twill weave, satin weave, etc. is used, but other forms include chopped strand mat, surfing mat, roving cloth, etc.

Further, in order to improve resin impregnation and resin adhesion, it is preferable to subject the surface of the glass fiber to general pretreatment such as chromium treatment or silane treatment.

The proportion of the above-mentioned woven fabric in the entire track material is preferably 30 to 50% by weight.

Aromatic polyester resin is not only self-lubricating but also thermally stable.
It has wear resistance, weather resistance, and has excellent rigidity and thermal conductivity, so it provides stable friction characteristics when vehicles are sliding at high speeds, and it also does not cause adhesion like metal materials. Not at all.

As the aromatic polyester resin, it is preferable to use the following recently developed resin in which roseoxybenzoyl units are connected in a linear chain.

If the aromatic polyester resin is less than 20% by weight, it cannot fully exhibit its effects, and if it is more than 50% by weight, the load bearing capacity as a track material deteriorates, which is not preferable.

Phenolic resins are basically made from powdered novolak or resol type phenolic resins obtained by reacting phenol and formaldehyde, and are preferably made from powdered phenolic resins such as hexamethylenetetramine (hexamine) and polyoxymethylene. A mixture of 80 to 95 parts of a novolak type containing a curing agent and 20 to 5 parts of a resol type is preferred.

The phenol resin cannot exhibit its effect as a binder when the weight ratio is less than 20 weight ratio, and the mechanical strength decreases when the weight ratio exceeds 60 weight ratio, so a range of 20 to 60 weight ratio is preferable.

Graphite powder and molybdenum dioxide powder are particularly rich in lubricity, and when mixed with aromatic polyester resin and phenolic resin, suppress wear during dry friction.

However, if the amount of graphite and molybdenum dioxide powder added is large, the track material becomes brittle and has poor load carrying capacity, which is not preferable.

The preferred content in this invention is 10 to 20% by weight.

Finally, paraffin wax is a product of crystalline paraffin separated and refined from petroleum, and the number of carbon atoms is CI6 to C40.
There are many C20-C50 types, and the product name is Hi-Mic-2095 (made by Nihon Seiro Co., Ltd., melting point 205°F, specific gravity 0.787). Micron 9 Starine wax is preferred.

In addition, in order to effectively exude water for a long time, the blending amount is 3 to 3.
20 weight ratio is preferable.

To explain the case of molding the runway material of the present invention using the above-mentioned composition materials, a woven fabric made of glass fiber or carbon fiber is used as the core material, and 30 to 60 weight of graphite powder-containing aromatic polyester resin powder prepared in advance is used. Novolac powder 80~30% by weight and 2 layers of paraffin straw
Add 20 to 5 parts of resol containing 95 parts to 20 to 60 parts by weight to form a mixed solution, impregnate the core material in this impregnation solution, and press-form into a sheet at a temperature of 150 to 160°C. and manufacture it.

The production of this track material is not limited to the batch method; instead, the woven fabric to be treated is continuously impregnated in an impregnating tank that stores the above-mentioned mixed solution, and then the fabric is impregnated using a roto-cure breath, etc. A continuous method in which the phenolic resin is cured into a sheet by passing through a continuous heating and pressurizing device is efficient.

Further, in order for the paraffin wax to gradually ooze out over time, it is preferable that the sheet itself has a capillary structure with small voids.

At this time, aromatic polyester resin, graphite powder, and molybdenum disulfide powder are particularly excellent in self-lubricating properties and wear resistance as the sliding track material, so it is preferable that these materials are distributed more widely on the sliding surface.

Therefore, the first layer mainly composed of aromatic polyester resin, graphite powder, or molybdenum disulfide powder and the second layer mainly composed of phenolic resin are separately constructed, each of which is a woven fabric made of glass fiber or graphite fiber. impregnated with water at a temperature of 220 to 290℃ and a temperature of 160 to 180℃, respectively.
1st by heating and pressurizing at ℃. After forming the second sheet,
Both sheets are stacked and glued together at room temperature to form the first
Create a sliding track material that uses the layer as a friction surface.

The slide track material prepared as described above is self-lubricating, has mechanical strength comparable to conventional metal track materials, and has heat resistance and wear resistance, making it suitable for use in railway vehicles propelled by linear motors. It is sufficiently usable as a track for sliding guidance.

Furthermore, the lubricity of the raceway material of the present invention can be further improved by impregnating it with water after molding.

Hereinafter, the present invention will be explained in more detail based on Examples.

Examples Aromatic polyester resin powder containing graphite powder prepared in advance in the proportions shown in Table 1, paraffin wax,
The phenolic resin-forming materials were mixed to form an impregnating solution, which was impregnated into a 6rIR thick glass fiber woven fabric.

Next, the mold was pressed at 150℃ for 30 minutes until the total thickness was 8.
? A 7s sheet was produced.

A dry non-lubricated friction test and an abrasion test were conducted using sheets with each material ratio.

The test results are shown in Figures 1 and 2.

According to the test results, as the content of the graphite-containing polyester resin increases, the degree of wear decreases and becomes better, but the coefficient of friction does not necessarily decrease.

In addition, in this case, since the amount of phenol resin as a binder is reduced, the bonding strength is weak, which poses a problem in terms of durability.

Furthermore, when water or grease was applied to each of the above-mentioned sheet surfaces, the friction coefficient and the amount of wear were even smaller than when dry and unlubricated, and particularly in the case of water lubrication, a remarkable effect was obtained at low speeds.

[Brief explanation of the drawing]

FIG. 1 is a graph showing the wear characteristics of the track sheet material for a planing vehicle according to the present invention as a function of the vehicle running speed, and FIG. 2 is a graph showing the wear characteristics of the same material as a function of the vehicle running speed.

Claims (1)

[Claims] 1 A mixture of 20 to 50 wt% aromatic polyester resin powder, 20 to 60 wt% phenol resin, 10 to 20 wt% graphite powder or molybdenum disulfide powder, and paraffin wax lO to 20 wtφ to a woven fabric made of glass fiber or graphite fiber. A track sheet material for sliding vehicles made by impregnating and integrating the following.