Claims
- 1. A method of producing a component of a ball bearing, comprising the steps of:
- injection molding a synthetic resin into a predetermined shape to obtain said component; and
- immersing the component in a heated lubricating oil having a viscosity of 10 to 150 mm.sup.2 /s at 40.degree. C. for impregnating the interior of said component with said lubricating oil.
- 2. The method of claim 1, further comprising the step of standing said mold at ordinary temperature after said molding step.
- 3. The method of claim 1, further comprising the step of drying said mold for removing the moisture entered into said cage from the air atmosphere after said molding step.
- 4. The method of claim 1, further comprising the step of removing an excess lubricating oil adhered to a surface of said mold.
- 5. The method of claim 1, wherein said immersing step is carried out by immersing said cage for 5 hours in said lubricating oil heated to 80.degree. C. with a heater.
- 6. The method of claim 1, wherein said component is immersed in said lubricating oil contained in an oil bath supplied with inert gas.
- 7. The method of claim 6, wherein said inert gas comprises nitrogen gas (N.sub.2), and said cage is immersed in said lubricating oil contained in said oil bath supplied with said nitrogen gas having a pressure of 8 kgf/cm.sup.2.
- 8. The method of claim 1, wherein the lubricating oil contains at least one oil agent selected from the group consisting of phosphoric acid ester, fatty acid, higher alcohol, amine, organomolybdenum compound, and mixtures thereof in an amount of 0.5 to 10% by weight of the lubricating oil, and a rust inhibitor selected from the group consisting of calcium sulfonate, barium sulfonate and mixtures thereof in an amount of 2 to 10% by weight of the lubricating oil.
- 9. The method of claim 1, wherein said component is impregnated with the lubricating oil in an amount of 0.1 to 1.0% by weight of said mold.
- 10. The method of claim 1, wherein said component is one of an outer race, an inner race, a ball, and a cage of the ball bearing.
Priority Claims (3)
Number |
Date |
Country |
Kind |
4-358511 |
Dec 1992 |
JPX |
|
5-262427 |
Oct 1993 |
JPX |
|
5-262652 |
Oct 1993 |
JPX |
|
Parent Case Info
This is a divisional of application Ser. No. 08/174,041 filed Dec. 28, 1993, U.S. Pat. No. 5,401,105.
US Referenced Citations (10)
Foreign Referenced Citations (3)
Number |
Date |
Country |
61-6429 |
Jan 1986 |
JPX |
6446011 |
Feb 1989 |
JPX |
193623 |
Apr 1989 |
JPX |
Non-Patent Literature Citations (1)
Entry |
Patent Abstracts of Japan, vol. 13, No. 300; 11 Jul. 1989; p. 148 and JP 01-093623 A (Koyo Seiko) 12 Apr. 1989 (see abstract). |
Divisions (1)
|
Number |
Date |
Country |
Parent |
174041 |
Dec 1993 |
|