| 摘要 |
A CONTINUOUS COLD-FORMING OF STRIP MATERIAL IS USED TO PRODUCE BUILDING ELEMENTS (1) HAVING TRANSVERSE RIBS (4) EXTENDING ACROSS AT LEAST PART OF THE ELEMENT(1). THE INHERENT ADVERSE TENDENCY OF THIN STRIP (8) TO TWIST AND DISTORT AS IT ISSUES FROM TRANSVERSE RIB FORMING DEVICE IS PREVENTED BY PROVIDING A STRESS RELIEF DEVICE (23, 24) FOR APPLYING A COMPRESSION LOAD TO THE TRANSVERSE RIBS (4) IMMEDIATELY DOWNSTREAM OF EACH PAIR OF TRANSVERSE RIB-FORMING ROLLS (12, 13). THE STRESS RELIEF DEVICE (23, 24) INCLUDES A FIRST ROLLER DEVICE AND A SECOND ROLLER DEVICE FORMING A NIP FOR RECEIVING RIBBED STRIP (8), WHEREIN EACH ROLLER DEVICE IS DISPOSED TO ENGAGE AN OUTER CREST PORTION OF EACH RIB (4) PROJECTING TOWARDS IT. THE SECOND ROLLER DEVICE INCLUDES A PAIR OF SUBSTANTIALLY PARALLEL COEXTENSIVE SPACED-APART SECOND ROLLERS (14, 15) AND THE FIRST ROLLER DEVICE INCLUDES A FIRST ROLLER (16), THE FIRST ROLLER (16) BEING SUBSTANTIALLY PARALLEL TO, COEXTENSIVE WITH AND EQUI-SPACED FROM EACH OF SAID SECOND ROLLERS (14, 15).(FIG. 7)
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