Shrink film heating device

Abstract

A shrink film heating device includes a chassis above which a hood is arranged. A conveyor belt and a driving belt are arranged between the chassis and the hood. The hood has an upper wall to which at least one heating assembly is mounted to supply hot air into a hollow interior space of the hood. The hood has front and rear walls forming openings that define a heating channel through the hood. Two heat homogenization assemblies are respectively set at opposite sides of the heating channel inside the hood and include a conduit coupled to an air supply source in order to supply regulate temperature air into the hood for mixing with and uniformly distributing high temperature air uniformly through the interior space of the hood so as to achieve uniform heating of a packaged object moving through the heating channel.

What is claimed is: 
     
         1 . A shrink film heating device, comprising:
 a chassis;   a hood, which is arranged above the chassis, the hood has an upper wall to which at least one heating assembly is mounted for supplying hot air into an hollow interior space of the hood, the hood having an open bottom facing downward and corresponding to a conveyor belt, the hood having front and rear end walls, each forming an opening through which the conveyor belt passes through a heating channel defined in the hollow interior space of the hood;   the conveyor belt, which is arranged between the chassis and the hood and is adapted to move a packaged object that is packaged with a shrink film to pass through the hood;   a driving belt, which is located above the conveyor belt to selectively engage the packaged object in order to turn the packaged object for uniform heating; and   two heat homogenization assemblies, which are respectively set at opposite sides of the heating channel inside the hood to supply regulate temperature air into the hollow interior space of the hood;   wherein the regulate temperature air that is supplied into the interior space of the hood is mixed with high temperature air existing in the interior space of the hood and uniformly distributed in the interior space of the hood to achieve uniform heating of the packaged object moved by the conveyor belt to pass through the heating channel and thus realizing excellent result of packaging with the shrink film.   
     
     
         2 . The shrink film heating device as claimed in  claim 1 , wherein each of the heat homogenization assemblies comprises a frame and a plurality of air ducts mounted to the frame, each of the air ducts forming a plurality of air discharge openings, which allows air that is located inside the air duct to be discharged through the air discharge openings, each of the air ducts having an end connected to a common conduit, which is coupled to an air supply source in order to supply the regulate temperature air into the interior space of the hood. 
     
     
         3 . The shrink film heating device as claimed in  claim 1  or  2 , wherein the heat homogenization assemblies are adjustable in the amount of air supplied into the interior space of the hood in accordance with the amount of high temperature air supplied by the heating assembly.