| 摘要 |
A mold for blow molding a container from a preform, the container including a wall portion and a base including a high standing ring and a central outwardly-inclined invertible diaphragm, the mold including sidewalls forming a counter print of the wall portion of the container (1) and a mold base (36) having an upper surface (37) defining a counter print of the container base, wherein the upper surface (37) includes: an annular peripheral face (43) corresponding to an annular support flange of the container base; a frusto-conical outer face (44) corresponding to an inner portion (11) of the high standing ring, the outer face (44) protruding upwardly with a draft angle (A2) from an inner edge of the peripheral annular face (43) up to a sharp apex (45), and a frusto-conical downwardly inclined inner face (46) corresponding to the invertible diaphragm. |
| 主权项 |
1. A mold (32) for blow molding a container (1) from a preform (16), said container (1) comprising a wall portion (5) and a base (7) including a high standing ring (8) and a central outwardly-inclined invertible diaphragm (9), said mold (32) comprising sidewalls (34A, 34B) forming a counter print of the wall portion (5) of the container (1) and a mold base (36) having an upper surface (37) defining a counter print of the container base (7), wherein the upper surface (37) includes:
an annular peripheral face (43) corresponding to an annular support flange (12) of the container base (7), a frusto-conical outer face (44) corresponding to an inner portion (11) of the high standing ring (8), said outer face (44) protruding upwardly with a draft angle (A2) from an inner edge of the peripheral annular face (43) up to a sharp apex (45), a frusto-conical downwardly inclined inner face (46) corresponding to the invertible diaphragm (9),and wherein:
the annular peripheral face (43) is in the shape of a frustum of a cone and shows an inward inclination in a transversal section, the peripheral face (43) defines, with respect of a plane (P) perpendicular to a mold base axis, an angle (A1) comprised between 1° and 10°, and the outer face (44) and the inner face (46) of the upper surface (37) together define at the apex (45) an angle (A3) comprised between 50° and 70°. |
