Claims
- 1. A portable, expandable mold for fabricating isocyanate-based polymer foam buns from the corresponding polymer foam forming mixture and adapted to be readily dismantled for transportation, which mold comprises a box mold having a floor, sidewalls and lid;
- said mold floor being in sheet form provided with stop means mounted on the periphery thereof;
- at least one oppositely disposed pair of said sidewalls having their lower edges in sliding contact with said floor and having their vertical edges held in abutting relationship with the vertical edges of adjacent sidewall members by extensible coupling means;
- said sidewalls, when held in said abutting relationship, defining a cross-sectional area less than that of said mold floor and of the foam bun to be fabricated;
- said lid having side projecting members adapted to provide sliding contact with the upper edges of said sidewalls during lateral movement of the latter;
- said lid being free to rise vertically and out of contact with the upper edges of said sidewalls under pressure from expanding foam mix; and
- said extensible coupling means being yieldable under pressure from expanding foam mix to permit such of said sidewalls as are free to do so to move outwardly and to engage said stop means on theperiphery of said mold floor.
- 2. A mold according to claim 1 wherein said sidewalls are disposed in a vertical plane.
- 3. A mold according to claim 1 wherein said sidewalls are disposed in a plane inclined to the vertical with the upper edges of said sidewalls defining a cross-sectional area greater than that defined by the lower edges of said sidewalls.
- 4. A mold according to claim 1 wherein said extensible coupling means comprise coiled springs.
- 5. A mold according to claim 1 wherein said extensible coupling means comprise elastic cords.
- 6. A mold according to claim 1 wherein there are four sidewalls defining a rectangle, all four of said sidewalls being slidably mounted on said floor.
- 7. A mold according to claim 1 wherein there are four sidewalls defining a rectangle, two oppositely disposed sidewalls being slidably mounted on said floor and the other two sidewalls being fixedly mounted on said floor.
Parent Case Info
This is a division of application Ser. No. 709,777 filed July 29, 1976 and now U.S. Pat. No. 4,104,346.
US Referenced Citations (15)
Foreign Referenced Citations (2)
Number |
Date |
Country |
695774 |
Oct 1964 |
CAX |
244925 |
Oct 1969 |
SUX |
Divisions (1)
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Number |
Date |
Country |
Parent |
709777 |
Jul 1976 |
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