Abstract:
Machine (18, 19) for processing containers (1) including a base (7) having a high standing ring (8) and a central invertible diaphragm (9), the machine (18, 19) including: a container supporting frame (20) including a hollow support ring (21) for engaging a container base (7), a pusher (26) movable with respect of the container supporting frame (20), capable of coming into abutment with the container base (7) through the supporting frame (20), an actuator (28) for slidingly moving the pusher (26) frontwards towards the container base (7) through the supporting frame (20), and backwards, a strain gauge (29) coupled to the actuator (28) for gauging a strain applied by the actuator (28) to the pusher (26), a control unit (30) including a processor (32) connected to the strain gauge (29) and programmed for comparing a gauged strain value to a memorized strain reference value.
Abstract:
The invention relates to a method for inverting the diaphragm of a filled and capped container. According to the invention, the container is placed on a support ring of an inversion device, a pressing member is applied to the container and a pusher is raised through the support ring to invert the diaphragm and shape the diaphragm into an arch. While the pusher inverts the diaphragm, the seat is moved away from the upper plane of the support ring, so that when the pusher reaches the raised position, a space is opened between the seat and the support ring to enable a longitudinal expansion of the container under the combined effect of the increase in internal pressure caused by the decrease in the volume due to the inversion and the forces generated inside the container by the pusher and the support member.
Abstract:
Disclosed is a container, made of plastic material, and provided with a base including a standing ring forming a support flange, an inner wall, a diaphragm and a central portion, the diaphragm being capable of standing in an outwardly-inclined position. The diaphragm connects to the standing ring at an outer junction, and connects to the central portion at an inner junction. The diaphragm is invertible with respect to the standing ring from the outwardly-inclined position to an inwardly-inclined position. In the outwardly-inclined position, the whole diaphragm is curved in radial section, with a concavity turned inwards with respect to the container. The diaphragm has a depth strictly greater than 1 mm.
Abstract:
The invention relates to a device (1) for inverting the base (21) of a container (2), comprising:
means for inverting the base (11), and at least one tool (12) for holding the container (2), each holding tool (12) having a retaining member (121), characterized in that the retaining member (121) has a bearing end (1211) that is brought to bear against a container (2), and in that each holding tool (12) also comprises: a centering member (122) mounted inside the retaining member (121), the centering member (122) being moveable inside the retaining member (121).
Abstract:
Disclosed is a Container (1) made of a plastic material, provided with a base (7) including a standing ring (8) forming a support flange (9) and a diaphragm (11) extending from the standing ring (8) to a central portion (10), the diaphragm (11) being capable of standing in an outwardly-inclined position. The diaphragm (11) connects to the standing ring (8) at an outer junction (12) forming an outer articulation of the diaphragm (11). The diaphragm (11) connects to the central portion (10) at an inner junction (13) forming an inner articulation of the diaphragm (11). The diaphragm (11) is invertible with respect to the standing ring (8) from the outwardly-inclined position to an inwardly-inclined position. In the inwardly-inclined position, at least an inner portion (16) of the diaphragm (11) adjacent to the inner junction (13) is curved in radial section, with a concavity turned outwards.
Abstract:
Disclosed is a container made of a plastic material, provided with a base including a standing ring forming a support flange and a diaphragm extending from the standing ring to a central portion, the diaphragm being capable of standing in an outwardly-inclined position. The diaphragm connects to the standing ring at an outer junction forming an outer articulation of the diaphragm. The diaphragm connects to the central portion at an inner junction forming an inner articulation of the diaphragm. The diaphragm is invertible with respect to the standing ring from the outwardly-inclined position to an inwardly-inclined position. In the outwardly-inclined position, the diaphragm has an outer curved portion and an inner curved portion of opposite curvatures.
Abstract:
Container made of a plastic material, provided with a base including a standing ring forming a support flange and a diaphragm extending from the standing ring to a central portion, the diaphragm being capable of standing in an outwardly-inclined position, the diaphragm connecting to the standing ring at an outer junction forming an outer articulation of the diaphragm with respect to the standing ring; the diaphragm connecting to the central portion at an inner junction forming an inner articulation of the diaphragm with respect to the central portion; the diaphragm being invertible with respect to the standing ring to an inwardly-inclined position; the central portion having a thickness greater than the diaphragm, the central portion having an annular section of greater thickness adjacent to the inner junction, the central portion having a central recess thinner than the annular section and protruding upwardly from an inner edge of the annular section.
Abstract:
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.
Abstract:
A method of manufacturing a hot-fill container (1) by means of blow molding a preform (16) provided with a wall and a closed bottom (19), said method comprising the steps of: heating the preform (16) at a temperature greater than the glass transition temperature of the plastic; introducing the such heated preform (16) within a mold (32) provided with a mold base (36) and sidewalls (34A, 34B), which sidewalls are heated at a predetermined temperature; blow molding the preform (16) to form the container (1) for subsequent hot-fill applications; wherein: the wall of said preform (16) has a lower end segment (24) of increased thickness and the bottom (19) has a thickness lower than the lower end segment (24), the preform (16) is subjected to a length stretch ratio comprised between 3.4 and 3.9, and a hoop stretch ratio comprised between 3.5 and 3.9.
Abstract:
A method for making a container made of a plastic material, provided with a base including a standing ring forming a support flange and a diaphragm extending from the standing ring to a central portion, the diaphragm being capable of standing in an outwardly-inclined position, wherein the diaphragm connects to the standing ring at an outer junction forming an outer articulation of the diaphragm; wherein the diaphragm connects to the central portion at an inner junction forming an inner articulation of the diaphragm; whereby the diaphragm is invertible with respect to the standing ring from the outwardly-inclined position to an inwardly-inclined position; and wherein, in the outwardly-inclined position, the diaphragm has an outer curved portion and an inner curved portion of opposite curvatures.