Source: http://www.google.com/patents/US6492000?dq=645576
Timestamp: 2015-01-30 19:06:41
Document Index: 364861615

Matched Legal Cases: ['art 7', 'art 7', 'art 7', 'art 8', 'art 7', 'art 7', 'art 7']

Patent US6492000 - Skin-carrying in-mold expanded molded body manufacturing method, the molded ... - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsIn a simultaneous molding to one piece, at a time of heat molding of a surface skin material 3, after an edge part of the surface skin material 3 is folded back to an inside direction of the mold pattern and is formed up a folded back part 7 along a mold pattern for folding back 6 which is placed as...http://www.google.com/patents/US6492000?utm_source=gb-gplus-sharePatent US6492000 - Skin-carrying in-mold expanded molded body manufacturing method, the molded body, and mold used for manufacturing the sameAdvanced Patent SearchPublication numberUS6492000 B1Publication typeGrantApplication numberUS 09/319,619PCT numberPCT/JP1998/000536Publication dateDec 10, 2002Filing dateFeb 9, 1998Priority dateFeb 10, 1997Fee statusPaidAlso published asCN1246822A, DE69837605D1, DE69837605T2, EP1008430A1, EP1008430A4, EP1008430B1, EP1764202A1, WO1998034770A1Publication number09319619, 319619, PCT/1998/536, PCT/JP/1998/000536, PCT/JP/1998/00536, PCT/JP/98/000536, PCT/JP/98/00536, PCT/JP1998/000536, PCT/JP1998/00536, PCT/JP1998000536, PCT/JP199800536, PCT/JP98/000536, PCT/JP98/00536, PCT/JP98000536, PCT/JP9800536, US 6492000 B1, US 6492000B1, US-B1-6492000, US6492000 B1, US6492000B1InventorsKiyoshi Matsuki, Yoriki KakimotoOriginal AssigneeKaneka CorporationExport CitationBiBTeX, EndNote, RefManPatent Citations (16), Referenced by (4), Classifications (14), Legal Events (5) External Links: USPTO, USPTO Assignment, EspacenetSkin-carrying in-mold expanded molded body manufacturing method, the molded body, and mold used for manufacturing the sameUS 6492000 B1Abstract In a simultaneous molding to one piece, at a time of heat molding of a surface skin material 3, after an edge part of the surface skin material 3 is folded back to an inside direction of the mold pattern and is formed up a folded back part 7 along a mold pattern for folding back 6 which is placed as in a manner of projecting from an opening edge 2 b of a cavity face 2 a toward the inside direction of the mold pattern, the mold pattern for folding back 6 is removed, and then at a time of the expansion molding, one face 7 a of the folded back part 7 is melt united to one piece with a back face 5 b of the cellular molded article in a mold pattern 5, and at the same time, a folded returning part 8, which is in a state that an outer edge part of the surface skin material 3 is folded returning toward an outside direction of the mold pattern from a tip 7 c of this folded back part 7, is pressed so as to pile on the other face 7 b of the above-mentioned folded back part 7. Images(20) Claims(34)
TECHNICAL FIELD This invention relates to a method for producing a cellular molded article having a surface skin in a mold pattern which is used, for example, as an automobile interior trim material or the like and an article thereof
BACKGROUND OF THE INVENTION As for the conventional technique of this kind, for example, (a) so-called simultaneous molding with a surface skin in once (simultaneous one piece molding) is known as disclosed in TOKUKAI-SHO 62-108039. In this method, as illustrated in FIG. 26, a male-female coupled mold pattern 2 is used, and after a surface skin material 3 is preformed by vacuum-forming along a cavity surface 2 a of female pattern 9, an expansion molding is performed in a cavity (inside of the mold pattern) 4 which is shaped up by a male pattern 10 combining with a surface skin material 3, at the same time, a cellular molded article (a cellular molded article in a mold pattern) 5 is united with the above-mentioned surface skin material 3 simultaneously. In this simultaneous molding, when the above-mentioned surface skin material 3 is vacuum formed, the outer edge part of said surface skin material 3 is fold-back formed as well from opening edge 2 b toward an inside direction of the mold pattern along a folded back pattern (pattern for folding back) 6 which projects from opening edge 2 b of the above-mentioned cavity face 2 a toward the inside direction of the mold pattern in advance, and when the above-mentioned expansion molding is performed, a folded back part 7 of surface skin material 3 is united into one piece with back face 5 b of the above-mentioned expanded molded article (the expanded molded article in the mold pattern) 5.
DISCLOSURE OF THE INVENTION An essential feature residing in a method for producing a cellular molded article having a surface skin in a mold pattern of this invention which is claimed is that, in a method for producing a cellular molded article having a surface skin in a mold pattern in which the above-mentioned surface skin material is melt united to one piece with the surface of the cellular molded article in the mold pattern which is molded by an expansion molding within this mold pattern, after the surface skin material is heat-molded along a cavity face of the mold pattern, it is characterized in that when the above-mentioned heat-molding, after the outer edge part of the above-mentioned surface skin material is folded back toward the inside direction of the mold pattern and formed a folded back part along the pattern for folding back which is arranged so as opening the edge of the above-mentioned cavity face to project toward the inside direction of the mold pattern, and then, the above-mentioned pattern for the folding back is removed, thereafter, at a time of the above-mentioned expansion molding, the one face of the above-mentioned folded back part is melt united to one piece with the back face of the cellular molded article in the mold pattern as well as the folded returning part, which is in a state that the outer edge part of the surface skin material is folded back toward an outside direction of the mold pattern from the tip of this folded back part, is pressed so as to pile on the other face of the above-mentioned folded back part. Accordingly, a cellular molded article having a surface skin in a mold pattern can be produced in one serial process by using the above-mentioned mold pattern, and therefore, there is an advantage of that the assembling process for folding back the surface skin material to the back face of the above-mentioned cellular molded article in the mold pattern is unnecessary. Furthermore, by applying the above-mentioned whole process, there is another advantage of that, by pressing the above-mentioned folded returning part so as to be piled on the other face of the folded back part, the above-mentioned folded back part can be easily molded so as to be in a state of simply piled or melt adhered to one piece, in other words, so as to be in a state of approximately parallel position against the back face of the above-mentioned cellular molded article in the mold pattern. Moreover, in order to protect the surface side appearance of the cellular molded article having the surface skin in the mold pattern, the outer edge part of the above-mentioned surface skin material may be trimmed off simply by making the tip of the folded returning part to be positioned at the inside direction of the mold pattern from the base edge of the folded back part. Therefore this trimming work is advantageously to be done easily and is not necessarily to take care much for it.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional drawing of a state that a mold pattern for folding back is placed on a female mold pattern in a method for producing a cellular molded article in a mold pattern which is relating to the embodiment of example 1.
BEST MODE FOR PRACTICING THE INVENTION Embodiments of this invention are described below, based on the drawings, and when the same composition as the above-mentioned prior art comes out, its explanation is abbreviated by using the prescribed mark.
EXAMPLE 1 to 5 In a condition of both female mold pattern part and male mold pattern part which are composing of a mold pattern, after placement of a surface skin material on the above-mentioned female mold pattern by a vacuum forming, an expansion molding was carried out within this mold pattern. In inside part of the female pattern part which is composing a cavity face of the above-mentioned female pattern, a piping for streaming of a heating medium is formed in a state of meandering, and by streaming of a steam into this stream pipe, the cavity face was kept at a temperature as shown in Table 1. And, to the above-mentioned male pattern, vapor holes for feeding the steam into inside of the mold pattern and a feeder for filling expanded beads were mounted on.
COMPARATIVE EXAMPLE 1 to 3 A cellular molded article having a surface skin in the mold pattern was harvested as same as in example 1 to 5 except that cavity face of said female mold pattern was kept at a temperature shown in Table 1 by feeding of a steam into inside of the chamber of the female mold pattern which was not formed of the above-mentioned stream piping.
EVALUATION STANDARD ∘: the product design pattern of the metal mold was clearly printed on.
POSSIBILITY FOR INDUSTRIAL USE As described in the above, a method for producing a cellular molded article having a surface skin in a mold pattern and a molded article thereof which relate to the present invention are useful as an automobile interior trim material or the like and as a method for producing it, and particularly, it is appropriately useful in a case of producing an automobile interior trim material having advantages of,