US4713206A
Expired / Lapsed
US
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Process for dewaxing ceramic molded bodies
Assignee: NGK Insulators Ltd
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Filing: 1985-03-04
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Granted: 1987-12-15
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Expires: 2005-03-04
Abstract
Abstract A process for dewaxing a ceramic molded body is disclosed, the process includes heating an injection molded body made from ceramic material and a wax-series binder, said heating occurring upon a porous ceramic body.
Inventors
- 👤 Tadaaki Matsuhisa
- 👤 Shingo Sasaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 00:18
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/622; C04B35/626; C04B35/63; C04B35/638; B; B28; B28B; B28B11/00; B28B11/22; C04B35/632
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
43 words
A process for dewaxing a ceramic molded body comprising: forming an injection molded ceramic body, said ceramic body containing a wax-series binder; placing said molded body upon a honeycomb ceramic body; and heating said molded ceramic body to remove said wax-series binder therefrom.
Claim 2
Dependent Claim
43 words
A process for dewaxing a ceramic molded body comprising: forming an injection molded ceramic body, said ceramic body containing a wax-series binder; placing said molded body upon a honeycomb ceramic body; and heating said molded ceramic body to remove said wax-series binder therefrom.
Claim 3
Dependent Claim
26 words
The process according to claim 1, wherein said binder consists essentially of an exuding binder selected from the group consisting of paraffin waxes and microcrystalline waxes.
Claim 4
Dependent Claim
20 words
The process according to claim 1, wherein said honeycomb ceramic body contacts with a bottom face of said molded body.
Claim 5
Dependent Claim
31 words
The process according to claim 3, wherein the surface of said honeycomb ceramic body is machined so as to match with the shape of a bottom face of said molded body.
Claim 6
Dependent Claim
19 words
The process according to claim 1, wherein said ceramic molded body comprises a turbine rotor unit for a turbocharger.
Claim 7
Dependent Claim
56 words
The process according to claim 1, wherein said heating is performed in a hot air circulating-type electric furnace and said dewaxing is effected by holding said electric furnace at a temperature within a range of -10° C. to +50° C. of the melting point of the wax-series binder until a wax exuding phenomenon does not occur.
Claim 8
Dependent Claim
61 words
A process for dewaxing a ceramic molded body comprising: forming an injection molded ceramic body, said ceramic body containing a wax-series binder; placing said molded body upon a honeycomb ceramic body, said honeycomb ceramic body contacting a bottom face of said molded body; and heating said molded body in a hot air circulating-type electric furnace to remove said wax-series binder therefrom.
Claim 9
Dependent Claim
61 words
A process for dewaxing a ceramic molded body comprising: forming an injection molded ceramic body, said ceramic body containing a wax-series binder; placing said molded body upon a honeycomb ceramic body, said honeycomb ceramic body contacting a bottom face of said molded body; and heating said molded body in a hot air circulating-type electric furnace to remove said wax-series binder therefrom.
Claim 10
Dependent Claim
26 words
The process according to claim 7, wherein said binder consists essentially of an exuding binder selected from the group consisting of paraffin waxes and microcrystalline waxes.
Claim 11
Dependent Claim
32 words
The process according to claim 7, wherein a top surface of said honeycomb ceramic body is machined so as to match with the shape of the bottom face of said molded body.
Claim 12
Dependent Claim
19 words
The process according to claim 7, wherein said ceramic molded body comprises a turbine rotor unit for a turbocharger.
Claim 13
Dependent Claim
38 words
The process according to claim 7, wherein said dewaxing occurs at a temperature within a range of -10° C. to +50° C. of the melting point of the wax-series binder until a wax exuding phenomenon does not occur.
Claim 14
Dependent Claim
131 words
A process for dewaxing a ceramic molded body comprising: forming an injection molded ceramic body, said ceramic body containing an exuder binder selected from the group consisting of paraffin waxes and microcrystalline waxes; placing said molded body upon a ceramic honeycomb body, a bottom surface of said molded body contacting with a machined top portion of said honeycomb ceramic body such that the bottom portion of said molded body matches with the machined top portion of said honeycomb ceramic body; and heating said molded ceramic body in a hot air circulating-type electric furnace to dewax said ceramic molded body, said dewaxing being effected at a temperature within a range of -10° C. to +50° C. of the melting point of the wax-series binder until a wax exuding phenomenon does not occur.
Claim 15
Dependent Claim
131 words
A process for dewaxing a ceramic molded body comprising: forming an injection molded ceramic body, said ceramic body containing an exuder binder selected from the group consisting of paraffin waxes and microcrystalline waxes; placing said molded body upon a ceramic honeycomb body, a bottom surface of said molded body contacting with a machined top portion of said honeycomb ceramic body such that the bottom portion of said molded body matches with the machined top portion of said honeycomb ceramic body; and heating said molded ceramic body in a hot air circulating-type electric furnace to dewax said ceramic molded body, said dewaxing being effected at a temperature within a range of -10° C. to +50° C. of the melting point of the wax-series binder until a wax exuding phenomenon does not occur.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-12-14 | 1991-06-15 | 1991-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-12-14 | 1995-06-15 | 1995-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-12-14 | 1999-06-15 | 1999-12-15 | $7700.00 | Window Closed / Lapsed |