Process for core removal from molded products

Details Process for core removal from molded products Process for core removal from molded products

1994-02-17

1996-09-24

Davis, Robert

Plastic and nonmetallic article shaping or treating: processes

Direct application of electrical or wave energy to work

Microwave

164 36, 164522, 264221, B22C 902, B22C 3338, B22C 3352, B22C 3354

Patent

active

RE0353345

ABSTRACT:
A method of removing a core from a molded product in which the core is formed of a particulate inert material, such as [sand-bound] sand, bound together by a cured binder of a water soluble carbohydrate alone or mixed with a silicate is disclosed. The silicate is preferably an alkali earth metal silicate, preferably sodium silicate, and the carbohydrate is preferably a saccharide or starch. The binder is cured by heat. The core and molded product are exposed to water, preferably heated water in a bath or steam, to rapidly disintegrate the core and remove it from the molded product.

REFERENCES:
patent: 1589617 (1926-06-01), Austin
patent: 1902627 (1933-03-01), Elbogen
patent: 2303303 (1942-11-01), Schleicher
patent: 2401760 (1946-06-01), Heyroth
patent: 2407280 (1946-09-01), Hyman, Jr.
patent: 3021565 (1962-02-01), Bowman
patent: 3046147 (1962-07-01), Hathaway, Jr. et al.
patent: 3094422 (1963-06-01), Reinhold
patent: 3149383 (1964-09-01), Seyffer et al.
patent: 3645491 (1972-02-01), Brown et al.
patent: 3764575 (1973-10-01), Anderko et al.
patent: 3765920 (1973-10-01), Humphrey
patent: 3857715 (1974-12-01), Humphrey
patent: 4070196 (1978-01-01), Kraak et al.
patent: 4078599 (1978-03-01), Makiguchi et al.
patent: 4088723 (1978-05-01), Norton
patent: 4194918 (1980-03-01), George et al.
patent: 4329177 (1982-05-01), George
patent: 4391642 (1983-07-01), Stevenson et al.
patent: 4399858 (1983-08-01), Kurabe et al.
patent: 4438804 (1984-03-01), Aiga et al.
patent: 4514532 (1985-04-01), Hsu et al.
patent: 4617977 (1986-10-01), Mills
patent: 4638845 (1987-01-01), Sato et al.
patent: 4659526 (1987-04-01), Shimaguchi et al.
patent: 4763720 (1988-08-01), Sakamoto et al.
patent: 4808360 (1989-02-01), Natori et al.
patent: 4871497 (1989-10-01), Natori et al.
patent: 4904423 (1990-02-01), Foreman et al.
patent: 4917846 (1990-04-01), Takase et al.
patent: 4922991 (1990-05-01), Pitcher et al.
patent: 4925492 (1990-05-01), Kelkar et al.
patent: 5143665 (1992-09-01), Clubbs et al.
patent: 5158130 (1992-10-01), Sahari
Plastics Technology, Apr. 87; pp. 21, 23, 25.
Modern Plastics, Oct. 89; pp. 46-52.
Modern Plastics, Dec. 89; p. 114.
Adcosil/Moroc Sodium Silicate Binders, Oct. 89; pp. 1-3.
Japanese Patent Abstract JP 58032540 (Shinto Kogyo KK) Feb. 25, 1983.
Japanese Patent Abstract JP 59141342 (Komatsu Seisakusho KK) Aug. 14, 1984.
Swiss Patent Abstract SU 707032 (Coal Equipment Res Des) Jul. 23, 1987.
Modern Plastics International, Nov. 1989, pp. 7-8.
Translation of Japanese Kokai 55-36031, published Mar. 1980.

Affiliated with

Also associated with

Rating

Process for core removal from molded products does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for core removal from molded products, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for core removal from molded products will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1920631