Welded-in spout

Abstract

A welded-in spout for connecting to a container, in particular for connecting to two foil walls of a plastic container includes a neck having a pouring channel with a vertical longitudinal central axis; two outer side surfaces joined with the neck, wherein each outer side surface is provided with an interior side wall; a plurality of stiffening webs extending between the interior side walls; a plurality of corner transitions between the side walls and each of the stiffening webs, wherein each corner transition has a contour between a first straight line representing an extension of one of the interior side walls and a second straight line formed by a surface of one of the stiffening webs; and wherein the contour of at least one of the corner transitions for stabilizing the welded-in spout during an ultrasonic welding-in process has a curvature of less than 10/mm.

1 . A welded-in spout for connecting to a container, in particular for connecting to two foil walls of a plastic container, wherein the welded-in spout has a neck ( 3 ) which has a pouring channel ( 2 ) which has a vertical longitudinal central axis ( 1 ), and two outer side surfaces ( 6 ) which are joined to said neck and are preferably provided with welding lines ( 4 ) and are provided for welding to the container, and a plurality of stiffening webs ( 7 ,  8 ,  9 ) which form the corner transitions ( 7 . 1 ,  7 . 2 ,  8 . 1 ,  8 . 2 ,  9 . 1 ,  9 . 2 ) with the respective side wall ( 12 ) are arranged on the inside on the associated side walls ( 11 ,  12 ), wherein, viewed in a plane perpendicular to the longitudinal central axis ( 1 ), a corner transition ( 7 . 1 ,  7 . 2 ,  8 . 1 ,  8 . 2 ,  9 . 1 ,  9 . 2 ) is defined by a contour of the welded-in spout located between two intersecting straight lines ( 7 . 3 ,  7 . 4 ,  8 . 3 ,  8 . 4 ,  9 . 3 ,  9 . 4 ,  10 . 1 ), wherein the one straight line ( 10 . 1 ) constitutes the main extension of the surface ( 10 ) of the side wall ( 12 ) and the other straight line ( 7 . 3 ,  7 . 4 ,  8 . 3 ,  8 . 4 ,  9 . 3 ,  9 . 4 ) that of the surface of the stiffening web ( 7 ,  8 ,  9 ), characterized in that the contour of at least one corner transition ( 7 . 3 ,  7 . 4 ,  8 . 3 ,  8 . 4 ,  9 . 3 ,  9 . 4 ) for stabilizing the welded-in spout during an ultrasonic welding-in process has a curvature of less than 10/mm. 
     
     
         2 . The welded-in spout as claimed in  claim 1 , characterized in that the contour of the corner transition ( 7 . 3 ,  7 . 4 ,  8 . 3 ,  8 . 4 ,  9 . 3 ,  9 . 4 ) forms a circular arc. 
     
     
         3 . The welded-in spout as claimed in  claim 1  or  2 , characterized in that the contour has a circular arc section with a curvature less than or equal to 8/mm, preferably less than or equal to 6.7/mm. 
     
     
         4 . The welded-in spout as claimed in one of the preceding claims, characterized in that at least one stiffening web ( 7 ,  8 ) which reaches from the one side wall ( 12 ) to the opposite side wall ( 11 ) viewed in a bottom view in the direction of the longitudinal central axis ( 1 ) has a curvature less than 10/mm, in particular less than 6.7/mm in all four corner transitions ( 7 . 3 ,  7 . 4 ,  8 . 3 ,  8 . 4 ). 
     
     
         5 . The welded-in spout as claimed in one of the preceding claims, characterized in that at least one stiffening web ( 9 ) which is attached to only one side wall ( 12 ) has a curvature of less than 10/mm in its corner transitions ( 9 . 1 ,  9 . 2 ). 
     
     
         6 . The welded-in spout as claimed in one of the preceding claims characterized in that, viewed in a plane ( 15 ) parallel to the vertical longitudinal central axis ( 1 ), a cover transition ( 8 . 5 ,  8 . 6 ) defined between a cover ( 13 ) and a stiffening web ( 8 ) in a similar manner to a corner transition has a curvature of less than 10/mm. 
     
     
         7 . The welded-in spout as claimed in one of the preceding claims characterized in that at least one cover transition ( 8 . 5 ,  8 . 6 ) forms a circular arc. 
     
     
         8 . A welded-in spout, particularly as claimed in one of the preceding claims, characterized in that, viewed in a plane perpendicular to the side wall, a cover-side transition ( 8 . 7 ,  8 . 8 ) between a/the cover ( 13 ) and the side wall ( 11 ,  12 ) has a curvature less than 10/mm. 
     
     
         9 . The welded-in spout as claimed in one of the preceding claims including  claim 2 ,  7  or  8 , characterized in that, for the radius r of the circular-arc-shaped corner, cover or corner-side transition:
     r=m*φ+b    
 
       where
 φ=angle [°] between the respective parts of the welded-in spout (stiffening web, side wall, cover), 
 1.5*10 −3  mm/°≦m≦7*10 −3  mm/°, 
 −0.3 mm≦b≦0.2 mm.