WO1997014545B1 - Pattern forming thermoplastic composition cores containing fluorescing dye, patterns thereof and processes related thereto - Google Patents
Pattern forming thermoplastic composition cores containing fluorescing dye, patterns thereof and processes related theretoInfo
- Publication number
- WO1997014545B1 WO1997014545B1 PCT/US1996/016465 US9616465W WO9714545B1 WO 1997014545 B1 WO1997014545 B1 WO 1997014545B1 US 9616465 W US9616465 W US 9616465W WO 9714545 B1 WO9714545 B1 WO 9714545B1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cavity
- set forth
- core material
- dye
- visible light
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Abstract
A moldable composition suitable for use as a pattern core material for investment casting. The composition comprises a water-soluble continuous phase organic material and a water-soluble fluorescing dye dispersed through the continuous phase organic material. Related disposable thermoplastic patterns and methods are also disclosed.
Claims
AMENDED CLAIMS
[received by the International Bureau on 25 April 1997 (25.04.97); original claims 1-21 and 24 cancelled; original claims 22, 26 and 27 amended; new claims 28-35 added; remaining claims unchanged (2 pages)]
22. A method for forming a shaped, cavity-containing mass of thermoplastic composition for use in investment casting, the method comprising:
(a) causing a fluid thermoplastic pattern composition to flow into a mold and to solidify in the mold and about a core of moldable pattern core material comprising a water-soluble continuous phase organic material and a water-soluble fluorescing dye dispersed through the continuous phase organic material; (b) exposing the core material to water to remove the core material from the solidified thermoplastic pattern composition thereby to leave a cavity in the solidified thermoplastic pattern composition; and then
(c) inspecting the cavity for residual core material remaining in the cavity by directing into the cavity electromagnetic radiation of wave length to cause the fluorescing dye, upon exposure thereto, to produce electromagnetic radiation, and attempting to detect electromagnetic radiation that may be produced by the fluorescing dye in the residual core material that may remain in the cavity.
23. A method as set forth in claim 22 wherein said continuous phase organic material is polyethylene glycol.
25. A method as set forth in claim 22 wherein said moldable pattern core material further comprises a filler dispersed through the continuous phase organic material.
26. A method as set forth in claim 22 wherein said fluorescing dye is fluorescent and radiates visible light upon absorption of ultraviolet radiation.
27. A method as set forth in claim 26 wherein the cavity is inspected for residual core material remaining in the cavity by directing into the cavity ultraviolet radiation and visually inspecting the cavity for visible light produced by the fluorescing dye in the residual core material that may remain in the cavity.
28. A method as set forth in claim 22 wherein the
15 fluorescing dye is a phosphorescent dye.
29. A method as set forth in claim 28 wherein said phosphorescent dye radiates visible light after absorption of electromagnetic radiation at a frequency selected in a range of from about 3 X 10u Hz to about 3 X IO15 Hz.
30. A method as set forth in claim 28 wherein said phosphorescent dye radiates visible light after absorption of ultraviolet radiation.
31. A method as set forth in claim 30 wherein the cavity is inspected for residual core material remaining in the cavity by directing into the cavity ultraviolet radiation and then visually inspecting the cavity for visible light produced by the phosphorescent dye in the residual core material that may remain in the cavity.
32. A method as set forth in claim 25 wherein the moldable pattern core material further comprises an effervescent agent dispersed through the continuous phase organic material.
33. A method as set forth in claim 32 wherein the effervescent agent is sodium bicarbonate.
34. A method as set forth in claim 23 wherein the fluorescing dye is a fluorescent dye that radiates visible light upon absorption of ultraviolet radiation.
35. A method as set forth in claim 23 wherein the fluorescing dye is a phosphorescent dye that radiates visible light after absorption of ultraviolet radiation.
78180
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/546,373 US5605943A (en) | 1995-10-20 | 1995-10-20 | Pattern forming thermoplastic composition cores containing fluorescing dye, patterns thereof and processes related thereto |
| US08/546,373 | 1995-10-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO1997014545A1 WO1997014545A1 (en) | 1997-04-24 |
| WO1997014545B1 true WO1997014545B1 (en) | 1997-06-05 |
Family
ID=24180146
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/US1996/016465 Ceased WO1997014545A1 (en) | 1995-10-20 | 1996-10-15 | Pattern forming thermoplastic composition cores containing fluorescing dye, patterns thereof and processes related thereto |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US5605943A (en) |
| WO (1) | WO1997014545A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2253037C (en) * | 1997-11-12 | 2004-11-02 | Sakura Rubber Co., Ltd. | Method of manufacturing structure by using biodegradable mold |
| EP1688238A1 (en) * | 2005-02-02 | 2006-08-09 | Saab Ab | Method for repair of composite articles |
| JP2005288933A (en) * | 2004-04-01 | 2005-10-20 | Three M Innovative Properties Co | Flexible molding die and its manufacturing method |
| US7182121B1 (en) * | 2004-06-28 | 2007-02-27 | Viel David W | Investment casting method and materials |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1061535A (en) * | 1974-11-18 | 1979-09-04 | Daniel M. Zabiak | Fluorescent ink composition for jet printing |
| US4108931A (en) * | 1975-01-15 | 1978-08-22 | Ralph Ogden | System of making molds for investment casting |
| US4024637A (en) * | 1975-07-11 | 1977-05-24 | Polythetics, Inc. | Dentures and process for making the same |
| JPH0255638A (en) * | 1988-08-22 | 1990-02-26 | Godo Imono Gijutsu:Kk | Pattern material for precision casting |
| US4929403A (en) * | 1989-07-25 | 1990-05-29 | Audsley Edwin F | Process for forming multi-layer flexible molds |
| ZW16390A1 (en) * | 1989-11-08 | 1991-01-30 | Ventersdorp Kontrakteurs Edms | Tipping rail vehicle |
| CA2034370A1 (en) * | 1990-03-30 | 1991-10-01 | Peter W. Mueller | Process for identification evaluation and removal of microshrinkage |
| US5207964A (en) * | 1991-02-13 | 1993-05-04 | Mauro James J | Method for manufacturing a plastic hollow product using water soluble resin |
| US5118727A (en) * | 1991-03-13 | 1992-06-02 | E. I. Du Pont De Nemours And Company | Stable mixtures of colloidal silica and a film-forming polymer |
| US5178673A (en) * | 1991-04-12 | 1993-01-12 | Union Carbide Chemicals & Plastics Technology Corporation | Investment casting compositions and processes for the manufacture and use thereof |
| US5512490A (en) * | 1994-08-11 | 1996-04-30 | Trustees Of Tufts College | Optical sensor, optical sensing apparatus, and methods for detecting an analyte of interest using spectral recognition patterns |
| US5498280A (en) * | 1994-11-14 | 1996-03-12 | Binney & Smith Inc. | Phosphorescent and fluorescent marking composition |
-
1995
- 1995-10-20 US US08/546,373 patent/US5605943A/en not_active Expired - Fee Related
-
1996
- 1996-10-15 WO PCT/US1996/016465 patent/WO1997014545A1/en not_active Ceased
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