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1. WO2000038902 - WIDE-MOUTHED CONTAINER BOTTOM MOLDING METHOD USING STRETCH BLOW MOLDING

Publication Number WO/2000/038902
Publication Date 06.07.2000
International Application No. PCT/JP1999/007378
International Filing Date 28.12.1999
IPC
B29C 49/06 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
49Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
02Combined blow-moulding and manufacture of the preform or the parison
06Injection blow-moulding
B29C 49/12 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
49Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
08Biaxial stretching during blow-moulding
10using mechanical means
12Stretching rods
B29C 49/54 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
49Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
42Component parts, details or accessories; Auxiliary operations
48Moulds
54for undercut articles
B29C 51/04 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
51Shaping by thermoforming, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
04Combined thermoforming and prestretching, e.g. biaxial stretching
CPC
B29B 2911/14326
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
BPREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
2911Indexing scheme related to making preforms for blow-moulding bottles or the like
14Layer configuration, geometry, dimensions or physical properties of preforms for blow-moulding bottles or the like
1432Geometry
14326Variable wall thickness
B29B 2911/14633
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
BPREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
2911Indexing scheme related to making preforms for blow-moulding bottles or the like
14Layer configuration, geometry, dimensions or physical properties of preforms for blow-moulding bottles or the like
14586Mentioned dimensions
14593Wall thickness
14633of the body
B29B 2911/1464
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
BPREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
2911Indexing scheme related to making preforms for blow-moulding bottles or the like
14Layer configuration, geometry, dimensions or physical properties of preforms for blow-moulding bottles or the like
14586Mentioned dimensions
14593Wall thickness
1464of the bottom
B29C 2049/4807
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
49Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
42Component parts, details or accessories; Auxiliary operations
48Moulds
4802with means for locally compressing part(s) of the parison in the main blowing cavity
4807by movable mould parts in the mould halves
B29C 2049/4858
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
49Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
42Component parts, details or accessories; Auxiliary operations
48Moulds
4856Mounting, exchanging or centering moulds or parts thereof
4858Exchanging mould parts, e.g. for changing the mould size or geometry for making different products in the same mould
B29C 2791/007
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
2791Shaping characteristics in general
004Shaping under special conditions
007Using fluid under pressure
Applicants
  • A.K. TECHNICAL LABORATORY, INC. [JP/JP]; 4963-3, Ohaza-minamijo Sakaki-machi Hanishina-gun Nagano 389-0603, JP (AllExceptUS)
  • TAKEUCHI, Setsuyuki [JP/JP]; JP (UsOnly)
Inventors
  • TAKEUCHI, Setsuyuki; JP
Agents
  • AKIMOTO, Teruo; 1-1, Minami-aoyama 1-chome Minato-ku Tokyo 107-0062, JP
Priority Data
10/37386128.12.1998JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) WIDE-MOUTHED CONTAINER BOTTOM MOLDING METHOD USING STRETCH BLOW MOLDING
(FR) PROCEDE DE MOULAGE DU FOND D'UN RECIPIENT EVASE UTILISANT LE SOUFFLAGE BI-ORIENTE
Abstract
(EN)
A wide-mouthed container bottom molding method using stretch blow molding, wherein the barrel and bottom of a preform are separately stepwise stretched, whereby the bottom, like the barrel, of a wide-mouthed container can be molded to have an optional bottom surface that is thin-walled with a uniform thickness distribution. A blow mold (11) is used for subjecting a preform (1), obtained by integrally forming a short cylindrical thick-walled barrel (2) and a sheet-like thin-walled bottom (3) connected to the lower end of the barrel, to stretch blow molding to provide a wide-mouthed container (4, 5), the blow mold (11) having a bottom form (13) that is movable in a cavity (12). A stretch rod (16) is used that has both a core member (18) for pressing the central portion (3b) of the bottom (3) and a skirt member (19) positioned around the core member (18) to press a corner (2a). Stretching by the stretch rod (16) is applied to the barrel (2) and bottom (3) of the preform (1) separately such that either is stretched first until the barrel (2) reaches a cavity bottom edge (11b). The bottom (3) positioned on the bottom form (13) sunk onto the cavity bottom is further stretched such that it is pushed back into the cavity by the bottom form (13) and turned upward from a cavity bottom edge (11b).
(FR)
L'invention concerne un procédé de moulage du fond d'un récipient évasé utilisant le soufflage bi-orienté. Selon ce procédé, le tambour et le fond d'une préforme sont étirés séparément et de façon graduelle, le fond et le tambour du récipient évasé pouvant être moulés pour acquérir une surface de fond optimale à parois minces et à distribution uniforme de la largeur. Un moule de soufflage (11) sert à soumettre au soufflage bi-orienté la préforme (1), que l'on obtient en formant d'une seule pièce un tambour cylindrique court à parois épaisses (2) et un fond (3) à parois minces en forme de feuille relié à l'extrémité inférieure du tambour; cela permet d'obtenir un récipient évasé (4, 5), le moule de soufflage (11) possédant une forme de fond (13) déplaçable dans une cavité (12). On utilise une tige d'étirement (16) qui possède un élément noyau (18) destiné à comprimer la partie centrale (3b) du fond (3) et une jupe (19) disposée autour de l'élément noyau (18) et servant à comprimer un coin (2a). L'étirage au moyen de la tige d'étirage (16) s'applique séparément au tambour (2) et au fond (3) de la préforme (1); de cette manière, chacun d'eux est étiré en premier jusqu'à ce que le tambour (2) atteigne un bord de fond (11b) de la cavité. On continue à étirer le fond (3) placé sur la forme de fond (13) noyé dans le fond de la cavité jusqu'à ce qu'il soit repoussé vers l'arrière dans la cavité par la forme de fond (13) et tourné vers le haut depuis le bord de fond (11b) de la cavité.
Also published as
US09622945
Latest bibliographic data on file with the International Bureau