Abstract: A coupler having elastically deformable claws 32, 33 is fixed to the side plate 103 of one segment 1a. The side plate 103 of the one segment 1a and the side plate 102 of the other segment 1b are butted against each other, and the claws of the coupler are passed through the side plate of the other segment to protrude into the segment. The claws of the coupler protruding into the other segment are elastically deformed by a diameter expansion pin 11 to expand the diameter of the claws 32 and 33. The claws of the coupler whose diameter has been expanded presses the side plate of the other segment against the side plate of the one segment to couple both the segments in the longitudinal direction.

Abstract: Disclosed herein is a production apparatus of expansion-molded articles, comprising a mold equipped with a foamed particle feeder having a foamed-particle feed opening and a compressed-air ejection nozzle opening toward the mold, by which foamed particles contained in a hopper is filled into the mold through the foamed-particle feed opening by ejecting compressed air from the compressed-air ejection nozzle and then heated to expand them, and the foamed particles thus expanded are then cooled, thereby producing an expansion-molded article, wherein the apparatus is equipped with a compressed-air discharge orifice opening toward the foamed particle filling side of the apparatus in the course of a foamed-particle supply line connecting the hopper to the foamed-particle feed opening. An auxiliary member for transfer of foamed particles used in the production apparatus, and a production method of expansion-molded articles using this apparatus are also disclosed.

Abstract: Disclosed herein is a production apparatus of expansion-molded articles, comprising a mold equipped with a foamed particle feeder having a foamed-particle feed opening and a compressed-air ejection nozzle opening toward the mold, by which foamed particles contained in a hopper is filled into the mold through the foamed-particle feed opening by ejecting compressed air from the compressed-air ejection nozzle and then heated to expand them, and the foamed particles thus expanded are then cooled, thereby producing an expansion-molded article, wherein the apparatus is equipped with a compressed-air discharge orifice opening toward the foamed particle filling side of the apparatus in the course of a foamed-particle supply line connecting the hopper to the foamed-particle feed opening. An auxiliary member for transfer of foamed particles used in the production apparatus, and a production method of expansion-molded articles using this apparatus are also disclosed.

Abstract: An expansion-molded article is produced by filling prefoamed thermoplastic particles in a mold cavity formed in combination of mold sections, through each of which plural heating medium holes are defined, and then feeding a heating medium such as steam through the holes to heat and fusion-bond the particles into the article conforming with the mold cavity. Each of the mold sections is covered by a permeable porous sheet at least over the heating medium on a side of the mold cavity.