| 摘要 |
PURPOSE:To produce in a series of steps a fused box with an inner bottom member by first superposing the inner bottom member on a plate member in a flat plate condition, adhering the inner bottom member to the plate material, then bending and raising the periphery of a bottom part to form side walls of an equal height along the periphery of the inner bottom member, and thermally fusing end parts of the side walls to each other. CONSTITUTION:A plate material P provided with an inner bottom member 13 is supplied from a containing hopper 41 into a box-making zone S1, and is set in a predetermined position on an upper surface of a metallic mold 31. A hot blade 21 is pressed against the plate material P to form V-shaped bending grooves in the plate material P along the periphery of the inner bottom member and to cut edge parts of corner parts by melting. A pair of a first pressing plate 23 and a second pressing plate are moved downward, with the plate material P clamped therebetween, whereby the plate material P devoid of the edge parts is inserted into the mold 31. By this, the parts constituting side walls 12 of the plate material P are raised by bending along the inner walls of the mold 31, with the bending grooves as reference lines, and end parts of the side walls 12 are pressed against each other in the molten state, whereby the plate material P is formed in the shape of a box. |
