Plastic product and manufacturing method therefor

• US 6,126,774 A
• Filed: 09/05/1997
• Issued: 10/03/2000
• Est. Priority Date: 08/11/1995
• Status: Expired due to Fees

• Current Assignee: Ebara Corporation
• Original Assignee: Ebara Corporation
• Inventors: Ogawa, Toshiyuki, Takayama, Hirokazu
• Primary Examiner(s): Lorin, Francis J
• Application Number:
  US08/924,698
• Time in Patent Office: 1,124 Days
• Field of Search: 156/285, 156/286, 156/245, 156/295, 156/58, 264/401, 430/269, 430/320
• US Class Current: 156/285
• CPC Class Codes: B29C 64/124 using layers of liquid which are selectively solidified
• CPC Class Codes: B29C 70/086 and with one or more layers of pure plastics material, e.g. foam layers applying a non-preformed coating, e.g. a gel-coat, B29C37/0025; with foam blocks B29C70/86
• CPC Class Codes: B29C 70/088 and with one or more layers of non-plastics material or non-specified material, e.g. supports
• CPC Class Codes: B29C 70/342 using isostatic pressure
• CPC Class Codes: B29L 2031/7496 Pumps
• CPC Class Codes: B29L 2031/7498 Rotors with blades B29L2031/08
• CPC Class Codes: B33Y 80/00 Products made by additive manufacturing
• CPC Class Codes: Y10T 29/49259 with fiber reinforced structure
• CPC Class Codes: Y10T 428/1362 Textile, fabric, cloth, or pile containing [e.g., web, net, woven, knitted, mesh, nonwoven, matted, etc.]
• CPC Class Codes: Y10T 428/1393 Multilayer [continuous layer]
• CPC Class Codes: Y10T 428/24744 Longitudinal or transverse tubular cavity or cell

Abstract

A plastic product comprising an inner core portion made of plastic and having a solid shape or a hollow shape including an internal cavity, and a fiber-reinforced plastic layer formed on inner and/or outer surfaces of the inner core portion, whereby the plastic product has light weight, high strength and excellent vibration suppressing and noise shielding ability.

Claims

1. A method for manufacturing a plastic product, comprising:

forming an inner core so as to have a three-dimensional solid shape or a hollow shape including an internal cavity, by a photo-forming technique;

adhering a fiber-reinforced prepreg onto an inner surface and/or an outer surface of said core;

closely contacting said fiber-reinforced prepreg with said inner core by vacuum packing said fiber-reinforced prepreg and said inner core within a bag; and

curing said fiber-reinforced prepreg.

2. A method for manufacturing a plastic product according to claim 1, wherein said fiber-reinforced prepreg after curing has an elastic modules higher than that of said inner core.

3. A method for manufacturing a plastic product according to claim 1, wherein said fiber-reinforced prepreg is a carbon fiber mat impregnated with an epoxy resin, or a glass fiber mat impregnated with a thermosetting resin and maintained in a gel form.

4. A method for manufacturing a plastic product according to claim 1, wherein said plastic product is a component of a high speed and high pressure rotary machine.

5. A method for manufacturing a plastic part according to claim 4, wherein said component is a pump casing or an impeller.

6. A method for manufacturing a plastic product according to claim 2, wherein said plastic product is a component of a high speed and high pressure rotary machine.

7. A method for manufacturing a plastic product according to claim 3, wherein said plastic product is a component of a high speed and high pressure rotary machine.

8. A method for manufacturing a plastic part according to claim 6, wherein said component is a pump casing or an impeller.

9. A method for manufacturing a plastic part according to claim 7, wherein said component is a pump casing or an impeller.