Method of making a dunnage platform
A dunnage platform is in the general shape of a rectangular slab with legs extending form one side. The dunnage platform is made from an expanded polystyrene core. A chemical combination process is used to chemically combine portion of the core proximal to its surface with high impact polystyrene. In a first of two parts of the combination process, the core is placed in a forming mold with one of its two sides and two thirds of its thickness extending therefrom. A heated sheet of high impact polystyrene is brought into contact with the portion of the core extending from the mold. In a similar manner, the other of the two sides of the core is made to extend from the forming mold for contact with a heated sheet of high impact polystyrene.
1. A process for making a thermoplastic dunnage platform, comprising the steps of:
providing a forming mold adapted to receive an expanded polymer core, wherein said polymer core has been inserted into the forming mold, where a first side of the expanded polymer core and at least half the thickness of the expanded polymer core have been combined with a first high impact polymer sheet, wherein the polymer core has been removed from the forming mold;
reinserting the expanded polymer core in the forming mold, wherein a second side of the expanded polymer core and at least half the thickness of the expanded polymer core extend from the mold;
heating a second high impact polymer sheet; and
substantially surrounding the second side of the expanded polymer core and at least half the thickness of the expanded polymer core with the second high impact polymer sheet.
2. The process of claim 1 , wherein the high impact polymer sheets are heated to a temperature in a range of between:
293° F.; and
375° F.
3. The process of claim 1 , further comprising applying reduced pressure to mold the heated high impact polymer sheets to the expanded polymer core.
4. The process of claim 1 , wherein the high impact polymer sheets are chemically combined with the expanded polymer core.
5. The process of claim 1 , further comprising the steps of:
placing the expanded polymer core in proximity of the high impact polymer sheets; and
moving said expanded polymer core into contact with said heated high impact polymer sheets.
6. The process of claim 1 , further comprising causing air flow between the heated high impact polymer sheets and the expanded polymer core to mold the thermoplastic dunnage platform.
7. The process of claim 1 , wherein the second high impact polymer sheet is combined with two thirds of the thickness of the expanded polymer core.
8. A process for making a thermoplastic dunnage platform, comprising the steps of:
inserting an expanded polymer core in a forming mold, wherein a first side of the expanded polymer core and at least half the thickness of the expanded polymer core extend from the mold;
heating a first high impact thermoplastic sheet, and
substantially surrounding the first side of the expanded polymer core and at least half the thickness of the expanded polymer core with the first high impact thermoplastic sheet;
reinserting the expanded polymer core in the forming mold, wherein a second side of the expanded polymer core and at least half the thickness of the expanded polymer core extend from the mold;
heating a second high impact thermoplastic sheet; and
substantially surrounding the second side of the expanded polymer core and at least half the thickness of the expanded polymer core with the second high impact thermoplastic sheet.