Foam plastics display unit

DETAILED DESCRIPTION The present invention provides the means for attaching structure to the walls of a refrigeration unit having a thin inner and outer skin with the space in between filled with foam plastic.
It is an object of the present invention to provide a method for attaching to foam plastic in the walls of refrigeration units by locating metal plates at the points where structure is to be anchored to the foam plastic.
It is a further object of the present invention to make the walls of the refrigeration unit by locating metal plates at points where structure is to be anchored, and thereafter injecting foam plastic between the inner and outer skin of the refrigeration unit and allowing the foam plastic to harden.
It is yet another object of the present invention to anchor structure items such as ribs or shelf supports to metal plates located in foam plastic in the walls of a refrigeration unit.
It is even another object of the present invention to attach to the metal plates contained in the foam plastic by means of self drilling screws that will drill through the outer skin, foam plastic and plate to anchor itself in the plate.
It is yet another object of the present invention to secure the metal plates into position while the foam is being injected between the inner and outer skin by any convenient means such as tape or glue.
In the construction of a large refrigeration unit, the outer skin is located in position and the metal plates are secured thereto.
A typical way of holding the metal plates in position would be by tape or glue wherein the metal plates are attached to either the outer skin or the ends of the refrigeration unit.
The inner skin is then located in position and the foam plastic is injected into the space between the inner and outer skin.
Thereafter when the foam plastic hardens other structure such as ribs or shelf supports may be anchored into the foam plastic by means of a screw extending through the outer skin, foam plastic and into the metal plate.
The metal plate is typically a sixteenth of an inch thick so that it will give considerable structural support to the screw anchored therein