FIELD: mechanical engineering. SUBSTANCE: hole-forming cores have a built-up in cross section body from collapsible upper and lower hollow boxes. A low-melting member is positioned between the boxes. The lower box communicates with the low-melting member. EFFECT: improved structure. 2 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| CAVITIES FORMER | 2003 |
|
RU2258000C2 |
| FORM PANEL | 2003 |
|
RU2268974C2 |
| VOID FORMER | 0 |
|
SU1470526A1 |
| MOULD FOR MAKING THREE-DIMENSIONAL BOX-LIKE ARTICLES OF CONCRETE MIXES | 0 |
|
SU1028507A1 |
| BENDING REINFORCED CONCRETE STRUCTURE | 1993 |
|
RU2068932C1 |
| MOULD DIVIDER FOR MANUFACTURING PRESTRESSED ARTICLES FROM CONCRETE MIXES | 0 |
|
SU1491724A1 |
| MOLD FOR MAKING PRESTRESSED BOX-SHAPED CONCRETE ARTICLES | 0 |
|
SU1740168A2 |
| PRESTRESSED REINFORCED CONCRETE STRUCTURE | 2003 |
|
RU2273700C2 |
| HOLE-FORMING CORES | 0 |
|
SU1759639A1 |
| MOULD FOR MAKING PRESTRAINED RIBBED FERROCONCRETE ARTICLES | 0 |
|
SU1430282A1 |
