Automatic Packaging Method

Abstract

A film extruding mechanism for melting and extruding a resin material as raw material of a film to be formed from a resin extruding outlet so as to form the film using extrusion technology is disposed adjacent to a tray that contains an article to be packaging. The article to be packaged is packaged as soon as the film is formed while the film extruding mechanism forms the film. Accordingly, the article to be packaged can be easily packaged without preparation of the film.

1 . An automatic packaging method, comprising the steps of: 
 extruding melted resin material as raw material of a film from a resin extruding outlet;    cooling the extruded resin so as to form the film;    introducing the film immediately after forming the film above a tray charged with an article to be packaged; and    packaging the article with the film.    
     
     
         2 . An automatic packaging method, comprising the steps of: 
 positioning a tray, which contains an article to be packaged, adjacent to a film extruding mechanism for extruding melted resin material as raw material of a film from a resin extruding outlet so as to form the film; and    packaging the article with the film while the film extruding mechanism forts the film.    
     
     
         3 . An automatic packaging method according to  claim 1 , wherein a space of the resin extruding outlet is adjusted before extruding melted resin material so as to adjusting the thickness of film to be formed.  
     
     
         4 . An automatic packaging method according to  claim 2 , wherein a space of the resin extruding outlet is adjusted before extruding melted resin material so as to adjusting the thickness of film to be formed.  
     
     
         5 . An automatic packaging method according to  claim 1  or  2 , wherein a width of the resin extruding outlet is adjusted before extruding melted resin material so as to adjusting the width of film to be formed.  
     
     
         6 . An automatic packaging method according to  claim 3  or  4 , wherein a width of the resin extruding outlet is adjusted before extruding melted resin material so as to adjusting the width of film to be formed.  
     
     
         7 . An automatic packaging method according to  claim 1 , wherein the extruded resin is touched with a surface of rotating cooling drum so as to cool the extruded resin from the resin extruding outlet.  
     
     
         8 . An automatic packaging method according to  claim 2 , wherein the extruded resin is touched with a surface of rotating cooling drum so as to cool the extruded resin from the resin extruding outlet.  
     
     
         9 . An automatic packaging method according to claims  7  or  8 , wherein the rotating velocity of the cooling drum is adjusted according to the thickness of film to be formed.  
     
     
         10 . An automatic packaging apparatus, comprising: 
 a film extruding mechanism for extruding melted resin material as raw material of a film from a resin extruding outlet;    a film forming mechanism for touching the extruded resin with a surface of rotating cooling drum so as to cool and solidify the extruded resin from the resin extruding outlet; and    a packaging mechanism for introducing the film immediately, after solidifying on the surface of cooling drum, above a tray charged with an article to be packaged to package the article with the film.    
     
     
         11 . An automatic packaging apparatus according to  claim 10 , wherein size of the resin extruding outlet is adjustable.  
     
     
         12 . An automatic packaging apparatus according to  claim 10 , further comprising an obstructing plate disposed at the resin extruding outlet with whole width thereof, the obstructing plate is capable of moving so as to adjust a space of the resin extruding outlet so that the obstructing plate adjusts extruding amount of the melted resin from the resin extruding outlet so as to control the thickness of the film to be formed.  
     
     
         13 . An automatic packaging apparatus according to  claim 10 , further comprising a pair of obstructing members disposed at the resin extruding outlet so as to the ends of the obstructing members are opposite, the obstructing members are capable of sliding so as to adjust a width of the resin extruding outlet so that the obstructing members adjust the width of the melted resin from the resin extruding outlet so as to control the width of the film to be formed.  
     
     
         14 . An automatic packaging apparatus according to  claim 10 , wherein the resin extruding outlet is positioned higher than the axis of the cooling drum, and the resin extruding outlet is arranged upward.  
     
     
         15 . An automatic packaging apparatus according to  claim 10 , wherein the cooling drum is thin cylinder having at least one hollow supporting shaft connected with a pipe via a rotary joint so as to introduce the coolant into the cooling drum.  
     
     
         16 . An automatic packaging apparatus according to  claim 10 , wherein a surface of the cooling drum has fluoro resin treatment.  
     
     
         17 . An automatic packaging apparatus according to  claim 10 , wherein rotation velocity of the cooling drum is adjustable.  
     
     
         18 . An automatic packaging apparatus according to  claim 10 , wherein a film extruding mechanism having the resin extruding outlet and a film forming mechanism having the cooling drum is attached uniformly on a supporting frame, and further comprising a raising/lowering mechanism for rising or lowering the supporting frame toward the tray charged with the article to be packaged.  
     
     
         19 . An automatic packaging apparatus according to  claim 10 , further comprising a scraper whose edge is positioned upward so as to touch the cooling drum or be disposed toward the cooling drum with little gap.  
     
     
         20 . An automatic packaging apparatus according to  claim 19 , wherein the scraper is driven so as to generate micro-vibration.