| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a method and device attaining short-time and low-cost molding of a rugged cylindrical molded product. <P>SOLUTION: The molding device includes a first die 31, a second die 32, and a core metal structure 40 disposed between the dies 31, 32. Molding surfaces 31a, 32a of the dies 31, 32 have rugged longitudinal sectional forms. The core metal structure 40 has a first core metal 41, a second core metal 42 and an intermediate core metal 43. The intermediate core metal 43 is wedge-shaped that the thickness is gradually decreased from the one end side toward the other end side. The dies 31, 32 are relatively moved toward the core metal structure 40 in a state that the intermediate core metal 43 is at an advancing position where a space between the first core metal 41 and the second core metal 42 is increased to press-mold a cylindrical workpiece so as to crush it, thereby obtaining the cylindrical molded product 10. After press-molding, the intermediate core metal 43 is retreated to decrease the space between the core metals 41, 42 to radially and inwards retreat the core metals 41, 42 from the cylindrical molded product 10. Finally, the core metal structure 40 is drawn out from the cylindrical molded product 10. <P>COPYRIGHT: (C)2012,JPO&INPIT</p> |
