IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0595416
(2009-01-05)
|
등록번호 |
US-8272863
(2012-09-25)
|
우선권정보 |
FR-08 50073 (2008-01-08) |
국제출원번호 |
PCT/FR2009/050004
(2009-01-05)
|
§371/§102 date |
20091009
(20091009)
|
국제공개번호 |
WO2009/092930
(2009-07-30)
|
발명자
/ 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
3 |
초록
▼
The invention relates to a bottom of a mold (13) for a mold for producing containers, especially bottles, by blow molding or blow drawing, said containers having a body and a bottom (14) of a container, comprising a peripheral base (15) in the shape of a crown, which is connected on the inside to a
The invention relates to a bottom of a mold (13) for a mold for producing containers, especially bottles, by blow molding or blow drawing, said containers having a body and a bottom (14) of a container, comprising a peripheral base (15) in the shape of a crown, which is connected on the inside to a central area (16) forming an arch consisting of a plurality of radiating impressions (17) alternating with a plurality of radiating projections which are distributed in an angular and equidistant manner about a central axis (Y) of the bottom (14) of the container. For the molding of the central area (16) of the bottom (14) of the container, the bottom (13) of the mold comprises: a plurality of radiating projecting branches (19) distributed in an angular and equidistant manner, and extending approximatively radially to the axis (X) of the bottom of the mold; a central core (20) comprising a lateral wall (21) to which the branches (19) are connected; and in-between sections (22) forming cores of angular sectors regularly separating said branches from each other. The bottom (13) of the mold is characterized in that each radiating projecting branch (19) has an upper part (23) in the form of an inclined platform which descends from the center towards the periphery with at least two points (24, 25) of inflection of the curve.
대표청구항
▼
1. A mold base for a mold for producing, by blowing or stretch-blowing, containers, from preforms made of a thermoplastic material, in which said containers have a body and a container base including a peripheral seat, in the shape of a crown, internally connected to a central area forming a vault c
1. A mold base for a mold for producing, by blowing or stretch-blowing, containers, from preforms made of a thermoplastic material, in which said containers have a body and a container base including a peripheral seat, in the shape of a crown, internally connected to a central area forming a vault consisting of a plurality of radiating imprints alternating with a plurality of radiating projections, which are angularly distributed equidistantly around a central axis of said container base, wherein said mold base includes, for molding said central area of said container base, a plurality of radiating projecting branches that are angularly equidistantly distributed, and extending substantially radially to the axis of the mold base;a central trunk having a lateral wall to which said branches are connected;intervals forming portions of angular sectors regularly separating said branches from one another,wherein each said radiating projecting branch has an upper portion in the form of an inclined plate sloping downwardly from the center toward the periphery with at least two points of inflection of the curvature, owing to which, during the blowing or stretch-blowing, the blown material from the base of the blown preform can flow more easily over said upper portion of said branch, thereby enabling spreading and downward flowing movement of the amorphous material from the base of the blown preform to be improved. 2. The mold base according to claim 1, wherein said upper portion includes a first convex portion followed by a concave portion then a second convex portion. 3. The mold base according to claim 2, wherein said branches and said trunk are formed on a same base support, and in that said intervals each extend partially over said lateral wall of said trunk and partially over said base support, and a concave transition area is provided between said lateral wall of said trunk and said base support. 4. A mold base according to claim 1, wherein at least one interval has a bar with a convex ridge located angularly equidistantly between two immediately adjacent projecting branches. 5. The mold base according to claim 3, wherein a bar extends partially over said lateral wall of said trunk and partially over said base support. 6. The mold base according to claim 1 wherein an angular sector defined by each projecting branch is between 10 and 55°. 7. The mold base according to claim 1 wherein an the axial distance between an upper surface of said central trunk and said projecting branch is between 0 and 10 mm. 8. A molding device for producing, by blowing or stretch-blowing, containers, using a thermoplastic material, in which said containers have a body and a base including a peripheral seat, in the shape of a crown, internally connected to a central area forming a vault consisting of a plurality of radiating imprints alternating with a plurality of radiating projections, which are angularly distributed equidistantly around a central axis of the container, wherein the molding device comprises at least one mold consisting of at least three portions of which a mold base includes, for the molding of central area of the base of the containers, a plurality of radiating projecting branches, which are angularly distributed equidistantly, and extending radially with respect to an axis of said mold base;a central trunk has a lateral wall to which said branches are connected;intervals form portions of angular sectors regularly separating said branches from one another;and wherein each said radiating projecting branch has an upper portion in the form of an inclined plate sloping downwardly from the center toward the periphery with at least two points of inflection of a curvature, owing to which, during the blowing or stretch-blowing, the blown material from the base of the blown perform can flow more easily over said upper portion of the said branch, thereby enabling the spreading and downward flowing movement of the amorphous material from the base of the blown perform to be improved. 9. The mold base according to claim 7, wherein, said axial distance is between 3 and 4 mm. 10. A mold base for a mold for producing, by blowing or stretch-blowing, containers, from preforms made of a thermoplastic material, in which said containers have a body and a container base including a peripheral seat, in the shape of a crown, internally connected to a central area forming a vault consisting of a plurality of radiating imprints alternating with a plurality of radiating projections, which are angularly distributed equidistantly around a central axis of said container base, wherein said mold base includes, for molding said central area of said container base, a plurality of radiating projecting branches that are angularly equidistantly distributed, and extending substantially radially to the axis of the mold base;a central trunk having a lateral wall to which said branches are connected:intervals forming portions of angular sectors regularly separating said branches from one another,wherein each said radiating projecting branch has an upper portion in the form of an inclined plate sloping downwardly from the center toward the center periphery with at least two points of inflection of a curvature, owing to which, during the blowing or stretch-blowing, the blown material from the base of the blown preform can flow more easily over said upper portion of said branch, thereby enabling the spreading and downward flowing movement of the amorphous material from the base of the blown preform to be improved, wherein said upper portion includes a first convex portion followed by a concave portion, then a second convex portion, wherein said branches and said trunk are formed on a same base support, and in that said intervals each extend partially over said lateral wall of said trunk and partially over said base support, and a concave transition area is provided between said lateral wall of said trunk and said base support and wherein an inclination of a portion of said interval formed on said base support is between 0 and 30°. 11. The mold base according to claim 10, wherein said inclination is between 10 and 15°. 12. The mold base according to claim 6 wherein an angular sector defined by each projecting branch is between 20 and 25°.
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