Carpet floor mat having plastic migrating prevention formation, and associated injection mold

1. An injection molded carpet mat, comprising:

a flexible base having an upper surface defining a carpet recess, and an opposite lower surface;

a carpet sheet secured in said carpet recess by being integrally formed with said base, and having a napped top surface, a bottom surface and a peripheral edge;

said lower base surface having a plurality of spaced ribs supporting said carpet bottom surface adjacent said peripheral edge; said base defining a track corresponding to said peripheral edge of said carpet sheet; and

said upper base surface defines a chamber for accommodating said peripheral edge, a floor of said chamber being defined by adjacent edges of said ribs.

2. The carpet mat of claim 1 , wherein said carpet sheet bottom surface is integrally formed with, and is in contact with a corresponding upper surface of each said rib.

3. The carpet mat of claim 1 , wherein said ribs in vertical cross-section taper towards said peripheral edge.

4. The carpet mat of claim 3 , wherein said peripheral edge of said carpet sheet is angled relative to a main plane defined by said mat, said angle corresponds to said taper of said ribs.

5. The carpet mat of claim 1 , wherein said chamber is defined in part by a perimeter rib configured for obscuring said peripheral carpet sheet edge from view from said upper base surface.

6. The carpet mat of claim 5 , wherein said perimeter rib extends about the entire peripheral edge of said carpet sheet.

7. The carpet mat of claim 5 wherein said perimeter rib extends in a direction generally parallel to a plane defined by said base.

8. The carpet mat of claim 1 , wherein said carpet sheet peripheral edge is discontinuous with an outside edge of said base.

9. The carpet mat of claim 1 further including at least one grommet integrally molded into said base.

10. The carpet mat of claim 1 wherein a top surface of said carpet sheet is flush with said upper surface of said base.