JPH05138767A - Surface-finished synthetic resin member and production thereof - Google Patents

Abstract

PURPOSE:To obtain a method for obtaining a member surface as smooth as the members can accurately adhere with each other without conducting a polishing operation in the case that a mechanical component is composed of a filler-containing synthetic resin referred as engineering plastics. CONSTITUTION:An uncured synthetic resin material containing a filler F is molded into a fixed shape using a mold. After that, a finishing mold 50 is vibrated and applied to the molded member. In this manner, the surface of the member is again melted, and a layer of a resin component P unevenly exists on the surface of the member. As a result, a smooth surface without irregularities caused by the particle diameter of the filler F is obtained.

Description

Detailed Description of the Invention

[0001]

[Object of the Invention]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surface finishing method when a mechanical component is made of a synthetic resin called so-called engineering plastic.

[0002]

BACKGROUND OF THE INVENTION Mechanical devices and mechanical parts, which are generally made of metal materials, are now made of so-called engineering plastics, which have excellent mechanical suitability. However, for example, in the case where the surface precision of parts and the like is extremely strict, it is not possible to meet the request, and it has been recognized that it is difficult to carry out conventionally.
There was no active approach to development.

As an example thereof, there is a scroll fluid machine, and in this case, a set of spiral wraps, which is a main member for operating a fluid, has an important structure, The sealing condition at the contact points between the laps that contact each other determines the quality of the performance.
For this reason, the conventional scroll fluid machine has been manufactured by mainly forging metal, and after forging, carefully polishing the surface of the lap. However, this surface polishing work requires extremely troublesome work even when using a numerically controlled so-called NC lapping machine because the lap itself has a complicated spiral shape.

By the way, as described above, engineering plastics have a considerable advantage in terms of cost and maintenance. By using engineering plastics for scroll fluid machines as described above,
Although it is expected that many improvements will be brought, as described above, the finishing surface of the wrap of the scroll fluid machine requires accuracy of 1 μm or less.
In the case of engineering plastics, the particle size of the filler, which is the filler, is often larger than that, and it is a bottleneck that the required accuracy cannot be achieved, preventing its realization.

[0005]

[Technical Items Attempted to Develop] The present inventors have developed a new method for surface finishing such machine parts that require particularly precise surface finishing in order to open the way of using so-called engineering plastics. Is an attempt to develop.

[0006]

[Constitution of the invention]

[Means for Achieving the Object] That is, in the surface-finished synthetic resin member according to the first invention of the present application, the resin layer is unevenly distributed by re-melting the member surface made of the synthetic resin material containing the filler after molding. It is characterized in that it is molded in the formed state.

The surface-finished synthetic resin member according to the second invention of the present application is characterized in that, in addition to the above requirements, the synthetic resin material containing the filler is an engineering plastic.

Furthermore, in the method for producing a surface-finished synthetic resin member according to a third invention of the present application, an uncured synthetic resin material containing a filler is primarily molded into a constant shape by a molding die, and thereafter, The vibrating finishing die is applied to the member after the primary molding, the surface of the member is re-melted, and the surface of the member is smoothly covered with the resin layer.

Furthermore, the method for producing a surface-finished synthetic resin member according to a fourth invention of the present application is characterized in that, in addition to the above-mentioned requirements, the synthetic resin material containing the filler is an engineering plastic. Is. These inventions are intended to achieve the above object.

[0010]

According to the present invention, when a finishing die is applied after resin molding and microvibration is applied thereto, the surface of the molded synthetic resin member is heated and melted by microvibration, whereby A resin layer is unevenly distributed on the surface to obtain a smooth finished surface.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the illustrated embodiments, but the description will be given by exemplifying a case where the present invention is applied to a scroll fluid machine. Code 1
Is a scroll fluid machine to which the present invention is applied. When this is outlined, first, a substantially cylindrical housing 2 is provided as an outer casing member. A fixed scroll 10A and an orbiting scroll 1 which are main members are provided in the housing 2.
0B is provided, and as an example, the fixed scroll 1 by directly utilizing the end plate of the housing 2 is used.
Form 0A. The fixed scroll 10A and the orbiting scroll 10B mesh with each other to form some fluid processing spaces, and these spaces are referred to as working chambers 3.

A fixed scroll 10A forming a part of the housing 2 is provided with a suction port 4 and a discharge port 5.
On the other hand, an eccentric drive shaft 6 is provided at the center of the housing 2 from the opposite side where the suction port 4 and the discharge port 5 are provided, and an orbiting scroll 10B is attached to the tip end of the eccentric drive shaft 6 to perform the orbiting motion. Further, the other end of the eccentric drive shaft 6 is projected from the housing 2 to the outside, and a drive motor or a pulley 7 is appropriately provided there to transmit the rotation. Reference numeral 8 is a rotation stopper provided so that the orbiting scroll 10B that orbits by the eccentric drive shaft 6 does not rotate (rotate).

Incidentally, these basic structures follow those of the conventional scroll fluid machine, and it goes without saying that an appropriate structure of a scroll fluid machine which is already known or can be improved thereafter can be applied to the present invention. .. The fixed scroll 10A for directly operating the fluid and the orbiting scroll 10B have substantially similar shapes. The fixed scroll 10A includes a spiral wrap 12A with respect to the end plate 11A, and the orbiting scroll 10B has the same shape. It includes an end plate 11B and a spiral wrap 12B. And the end plates 11A, 11 which are members contacting each other
The surface finishing structure, which is a characteristic feature of the present invention, is applied to B and the wraps 12A and 12B.

In the following description, the fixed scroll 1
0A and the orbiting scroll 10B are not required to be displayed separately, the scroll 10 and the end plate 11 are also used.
The A and 11B and the laps 12A and 12B are also displayed as the end plate 11 and the lap 12.

A specific method of applying the present invention to a scroll fluid machine will be described below. First, as synthetic resin materials, polyphenylene sulfide, polyarylate,
A so-called engineering plastic containing polysulfone, polyimide, polytriazine, polyacetal or the like as a main component is used. As shown in FIG. 4, a finishing die 50 having the finishing shape is applied to the material of the scroll 10 that has already been molded and taken out as shown in FIG. 4, and the surface of the wrap 12 or the like is finished to be smooth. That is, the finishing die 50 has a lap forming recess 51 formed in the shape of the wrap 12 of the scroll 10. The wrap 12 is allowed to enter between the lap forming recesses 51, and the already formed scroll 10 is processed while applying fine vibration such as high frequency vibration to the wrap. In this case, as shown in FIG. 4B, the surface of the wrap 12 which is in contact with the finishing die 50 is heated by fine high frequency vibration or the like to melt that portion, and the resin component P is unevenly distributed on the surface. It becomes a state of elution, and a smooth finish is made.

Incidentally, the application example of the present invention naturally requires not only the scroll fluid machine described above but also the hermeticity.
It can be applied to gear pumps and other appropriate members and parts.

[0017]

As described above, according to the present invention, the unevenness which is inevitably formed due to the inclusion of the filler F in the synthetic resin material is covered by unevenly distributing the resin layer on the surface. As a result, high adhesion can be maintained even with a member having a large roughness.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a scroll fluid machine to which a synthetic resin member of the present invention is applied.

FIG. 2 is a skeletal transverse sectional view of the same.

FIG. 3 is a vertical side view of the same.

[Fig. 4] Applying a finishing die to the molded scroll,
FIG. 3 is a skeletal vertical cross-sectional view showing a method for manufacturing a synthetic resin member of the present invention in which the surface finish is performed by melting the lap surface, and a fragmentary perspective view showing an enlarged part thereof.

[Explanation of symbols]

 1 Scroll Fluid Machine 2 Housing 3 Working Chamber 4 Suction Port 5 Discharge Port 6 Eccentric Drive Shaft 7 Pulley 8 Rotation Stopper 10 Scroll 10A Fixed Scroll 10B Orbiting Scroll 11 End Plate 11A End Plate 11B End Plate 12 Wrap 12A Wrap 12B Wrap 50 Finishing Type 51 Recess F Filler P Resin component

Claims (4)

[Claims] 1. A surface-finished synthetic resin member, characterized in that the surface of the member made of a synthetic resin material containing a filler is molded in a state where the resin layer is unevenly distributed by being melted after molding. 2. The surface-finished synthetic resin member according to claim 1, wherein the synthetic resin material containing the filler is an engineering plastic. 3. An uncured synthetic resin material containing a filler is primarily molded into a constant shape by a molding die, and then a vibrating finishing die is applied to the member after the primary molding to remelt the surface of the member, A method for producing a surface-finished synthetic resin member, characterized in that the surface of the member is smoothly covered with a resin layer. 4. The method for manufacturing a synthetic resin member according to claim 3, wherein the synthetic resin material containing the filler is an engineering plastic.