Claims
- 1. A method for forming an elongate molded hollow article made from concrete and comprising the sequential steps of forming a mold defining an inner and an outer surface corresponding to opposed surfaces of the molded article formed therein, said mold being arranged whereby said inner surface is movable relative to said outer surface, filling said mold with concrete, compressing the concrete by movement of said inner surface relatively towards said outer surface to remove surplus liquid from the concrete such that the concrete is given the characteristic of being at least partially cured, maintaining said compression and applying inward pressure over the outer surface of the concrete to remove surplus surface liquid from the outer surface while maintaining said compression, releasing said outer surface pressure and moving said inner surface relatively away from said outer surface to release the molded hollow article from said mold, and separating said mold from the molded hollow article.
- 2. A method according to claim 1 wherein the concrete is filled into said mold from one end of said mold under pressure, and where said inner surface of said mold is urged towards said outer surface of said mold prior to filling to thereby resist the pressure of the filling.
- 3. A method according to claim 1 wherein the concrete is filled into said mold using a tremmie adapted to traverse the length of said mold.
- 4. A method according to claim 1 wherein after filling of said mold said inner surface is further pressed outwardly against the concrete within said mold.
- 5. A method according to claim 1 wherein said inner surface of said mold includes liquid transference means for draining the surplus liquid from the concrete.
Priority Claims (1)
Number |
Date |
Country |
Kind |
1089 |
Jun 1985 |
AUX |
|
REFERENCE TO RELATED APPLICATION
This application is a continuation-in-part of copending application Ser. No. 07/044,846, filed May 14, 1987, now abandoned.
US Referenced Citations (7)
Foreign Referenced Citations (7)
Number |
Date |
Country |
42931 |
Jan 1931 |
AUX |
229102 |
Apr 1959 |
AUX |
278201 |
Sep 1963 |
AUX |
281262 |
Jan 1965 |
AUX |
1100126 |
Sep 1955 |
FRX |
88342 |
Jun 1946 |
NZX |
2137924 |
Oct 1984 |
GBX |
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
44846 |
May 1987 |
|