After filling, capping and labeling, product containers are
transported into the shrink wrapping equipment by means of inline
conveyor which delivers the product in 2, 3 or 4 lanes onto
collation table. Photo eyes mounted on the conveyor detect flow of
the products, The pneumatically operated bottle outgate cylinder
stops a set of bottles, after target products are achieved, the
outgate cylinder withdraws itself and ingate cylinder closes.
Products are transported to wrapping unit. Shrink wrapper machine
commonly uses two reels of film which are joined to form a web.
When the product intersects the film web, it passes through the
seal frame and moves onto the collation table. As the product moves
through the film the shrink wrap packaging machine detects film
usage and starts the powered film unwind feeding film. After enough
film is fed the powered film unwind system stops. As the product
moves through the seal frame, the carriage moves the seal frame
forward with the product and the seal bars close to form a film
sleeve around the product. The seal bars cut and seal the film.
After the seal dwell timer times out, the bars open and the
carriage returns to its home position. The product now in a the
film sleeve continues moving forward across the conveyor and
transfers onto the shrink wrap tunnel conveyor. The medium-speed
shrink wrap machine tunnel conveyor moves the product through the
shrink tunnel chamber. The film shrinks evenly around the product
as it travels through the tunnel. When the shrink wrapped product
exits the tunnel the film is still somewhat tacky. A cooling
section located at the exit of the tunnel blows ambient/cool air
onto the film as the product passes. The air cools the film and
allows for faster product handling. The fully shrink wrapped
product then transfers onto the customer’s conveyor completing the
shrink wrap packaging cycle.