Arrangement for feeding contents into a container being formed from a preform, in a machine for simultaneously moulding and filling containers made from preforms
The invention relates to an arrangement 1 for feeding contents into a container being formed from a preform 2 in a mold 3 , in a machine for simultaneously molding and filling containers made from preforms, wherein the arrangement defines, by the way of its wall 7 , a flow path between a contents-supply line 4 and the mouth opening 6 of the container. The arrangement 1 is characterized in that it has a sealing termination both in relation to the contents-supply line 4 and in relation to the preform 2.
1. An arrangement for feeding contents into a container being formed in a mold from a preform having an axis by a machine configured to simultaneously form and fill containers made from preforms, said arrangement comprising:
a conduit having an inner wall that defines a flow path between a contents line and a container mouth opening;
a first sealing termination in relation to the contents line; and
a second sealing termination in relation to the preform;
wherein an inner diameter of the conduit becomes smaller in a direction toward the container mouth opening, and
wherein the inner wall of the conduit includes a first portion having a concave curvature and a second portion having a convex curvature relative to the axis of the preform.
2. The arrangement according to claim 1 , wherein the second sealing termination takes place between the arrangement and one of:
the mouth opening of the preform;
an outside of the preform; and
the mold.
3. The arrangement according to claim 1 , wherein the inner diameter of the conduit constantly decreases in the direction of the container mouth opening between a first wall area that is substantially parallel to the axis of the preform and between a second wall area that is also parallel to the axis of the preform, wherein a transition between the contents line and the arrangement takes place tangentially to the first wall area of the arrangement, and wherein a transition between the second wall area of the arrangement and the container mouth opening takes place without edges and is axially parallel to the axis of the preform.
4. The arrangement according to claim 1 , wherein the contents line is approximately at a right angle to or approximately parallel to the axis of the preform or empties substantially horizontally, substantially vertically or inclined slightly downward into the arrangement.
5. The arrangement according to claim 1 , wherein a cross-sectional area of the conduit is limited around the axis of the preform.
6. The arrangement according to claim 1 , wherein the inner wall of the conduit has no edges.
7. The arrangement according to claim 1 , wherein the axis of the preform and a line tangent to a flattest section of the inner wall of the conduit taken in a plane containing the axis of the preform define an angle of 60° or less.
8. The arrangement according to claim 1 , wherein a radii of curvature of the inner wall of the conduit is greater than one half a height of the conduit and/or is greater than one fourth of a reduction in the diameter of the conduit.
9. The arrangement according to claim 1 , wherein the inner wall is superposed by a flow-conductive spiral contour.
10. The arrangement according to claim 1 , wherein the arrangement further comprises a stretching rod with a flow-conducting contour.
11. The arrangement according to claim 1 , wherein the arrangement surrounds an outside of the mouth opening of the preform.
12. The arrangement according to claim 1 , wherein the arrangement supports an outside of the container mouth opening of the preform against radial forces.
13. The arrangement according to claim 1 , wherein the arrangement is configured to be screwed onto the container mouth opening.
14. The arrangement according to claim 1 , wherein the arrangement is constructed of at least two parts, wherein one of the at least two parts is configured to be connected to the container mouth opening and wherein the at least two parts are configured to be connected to each other in a sealing manner.
15. The arrangement according to claim 14 , wherein a part of the arrangement that is not connected to the container mouth opening is firmly connected to a forming and filling station of the machine.
16. The arrangement according to claim 2 , wherein the second sealing termination takes place between the arrangement and the outside of the preform in a lower mouth opening area.
17. The arrangement according to claim 5 , wherein the cross-sectional area of the arrangement around the axis of the preform is circular.
18. The arrangement according to claim 7 , wherein the angle is 45° or less.
19. The arrangement according to claim 10 , wherein the flow-conducting contour of the stretching rod a spiral flow-conducting contour or a helical flow-conducting contour.
20. The arrangement according to claim 1 , wherein the conduit is in a form of a funnel.