JPS6093193A - Manufacture of vane for air pump - Google Patents

Abstract

PURPOSE:To improve resistance of a vane to wear by a method wherein, after a lamination layer is formed by the use of thermoset resin and a glass fiber base material, sanding is applied on the surface to remove a resin skin layer. CONSTITUTION:After a glass cloth is impregnated with thermoset resin, i.e., phenol resin and dried, a processing work is applied on the resultant work. Namely, the surface skin surface of a vane is firstly removed and only thickness of about 0.02mm. is secondly removed by a honing process to bring a glass cloth surface to an exposing state. Thus, since no resin skin layer remains on the vane surface, resistance to wear is improved, and the wearing amount of a mating material thereof can also be decreased.

Description

[Detailed description of the invention] The present invention relates to a method of manufacturing a vane for an air pump.

It is well known that air pump vanes are made of light plastic rather than metal in order to reduce inertia during rotation, and because they require rigidity when hot, thermosetting resin laminates are used. There is.

In order to ensure durability especially at high speeds of 5,000 revolutions per minute or more, extremely high requirements are set for the quality of vane members in terms of lifespan and wear resistance.

This requirement can be met by constantly supplying lubricating oil to the sliding parts of the vanes, but (1) contamination of the discharge air;
2) Since there are problems such as the need for a lubricating oil supply device, it is not a complete solution, and durability without lubrication is expected.

An object of the present invention is to improve the durability of air pump vanes without lubrication.

According to the present invention, this object is achieved by eliminating the resin skin layer on the sliding surface of the vane, which is laminated and molded from a thermosetting resin and a glass fiber base material such as glass cloth. That is, the resin skin layer is removed by sanding or honing the surface after lamination molding, or a glass cloth that is not impregnated with resin is used for the surface layer. As a result, unlike conventional vanes that leave a resin skin layer, the wear resistance of the vanes is improved and at the same time the wear of the seal carbon, which is the mating material, is reduced, making it possible to fully satisfy the desired durability.

The invention will now be described in detail.

The resin used for the vane is a thermosetting resin such as phenol resin, epoxy resin, or polyurethane resin. Glass cloth and glass nonwoven fabric are used as the glass fiber base material.

The following two methods are mainly used to manufacture the air pump vane of the present invention.

(1) This is a method in which the resin skin layer on the sliding surface is removed by sanding or honing after lamination molding to a predetermined thickness, and the thickness is 0.005 to 0.010 mm, preferably 0.01 to 0.05 mm. Qi is appropriate.

be.

The vane obtained by the present invention has the following features.

(1) The amount of wear on the vane sliding surface is reduced.

(2) The amount of wear on the seal carbon is reduced.

Next, examples will be described.

A glass cloth was impregnated with phenolic resin, dried, laminated, and then post-processed to obtain a vane. This vane is a vane with a conventional surface skin layer. Next, the surface skin layer of the vane is honed to a thickness of 0.02m.
m was removed to expose the glass cloth surface. For the obtained vane and a conventional vane for comparison, the seal carbon load was 5 kg/d, and the sliding speed was 4.2 m/'s.
ec, the wear amount of the vane and the seal carbon, which is the mating material, was measured under no lubrication conditions.

The results are shown in FIGS. 1 and 2. FIG. 1 is a graph showing the amount of wear on the vanes, where the horizontal axis is the sliding time T and the vertical axis is the amount of wear on the vanes. FIG. 2 is a graph showing the wear amount of the seal carbon, which is a mating material, where the horizontal axis shows the sliding time T and the vertical axis shows the wear amount C of the seal carbon. A shows the case of the vane obtained by the present invention, and B shows the case of the conventional vane.

As is clear from the figure, since the vane obtained by the present invention does not have a resin skin layer on its surface, it has excellent wear resistance and has the effect of reducing the amount of wear on the mating material.

[Brief explanation of the drawing]

FIG. 1 and FIG. 2 are graphs showing the amount of wear of the vane and seal carbon, respectively. To (LLjul) (Mountain W)

Claims (1)

[Claims] A method for producing a vane for an air pump, characterized in that a resin skin layer is not present on the sliding surface of a laminate formed from a thermosetting resin and a glass fiber base material such as glass cloth, which should maintain airtightness.