Manufacturing process of flexible packaging with dispensing valve

Abstract

Method for manufacturing flexible packages having a dispensing valve; which comprises: the vertical forming of a tubular body ( 2 ) by means of the vertical displacement and the longitudinal folding of a thermosealable film ( 1 ); the longitudinal sealing of two vertical ends ( 11, 12 ) of thermosealable film ( 1 ); obtaining independent flexible envelopes ( 3 ) from the tubular body ( 2 ), provided with a closed bottom and an open upper mouth ( 33 ), by means carrying out successive transversal sealings ( 32 ) and transversal cuts in said tubular body; and the horizontal displacement of the successive flexible envelopes ( 3 ) by a series of workstations in which the metering of the product to be packaged is carried out, the insertion of a dispensing valve ( 4 ) in the upper mouth ( 33 ) of the flexible envelope ( 3 ) and the sealing ( 34 ) of the upper mouth ( 33 ), fixing the dispensing valve ( 4 ).

1 . Method for manufacturing flexible packages having a dispensing valve characterized in that it comprises the following steps:
 a) the unwinding of a flexible thermosealable film ( 1 );   b) the vertical forming of a continuous tubular body ( 2 ) by means of the vertical displacement and the longitudinal folding of the thermosealable film ( 1 ) such that the vertical ends ( 11 ,  12 ) of the thermosealable film ( 1 ) are arranged opposing each other along their entire length;   c) the longitudinal sealing of the two opposing vertical ends ( 11 ,  12 ) of the thermosealable film ( 1 ) laterally closing the tubular body ( 2 );   d) obtaining independent flexible successive envelopes from the tubular body ( 2 ), provided with a closed bottom and an open upper mouth ( 33 ), by means of carrying out successive transversal sealings ( 32 ) and transversal cuts in said tubular body;   e) the horizontal displacement of the successive independent envelopes ( 3 ) by a series of work stations in which the metering (D) or filling of the product to be packaged in the interior of the successive flexible envelopes ( 3 ) is carried out, the insertion of an dispensing valve ( 4 ) in the upper mouth ( 33 ) of the flexible envelopes ( 3 ) and the sealing ( 34 ) of the upper mouth ( 33 ) of the flexible envelopes, establishing its closing and the fixing of the dispensing valve ( 4 ) to the corresponding flexible envelope ( 3 ).   
     
     
         2 . Method according to  claim 1 , characterized in that during vertical forming of the tubular body ( 2 ), there are defined in the thermosealable film ( 1 ), longitudinal folds which define a flexible envelope ( 3   a ) having two faces ( 35 ), front and rear, and two lateral bellows ( 36 ). 
     
     
         3 . Method according to  claim 1 , characterized in that during vertical forming of the tubular body ( 2 ), there are defined in the thermosealable film, longitudinal folds which define a flexible envelope ( 3   a ) having two faces ( 35 ), front and rear, and two lateral bellows ( 36 ).