Seat production method

Abstract

A method is provided for producing a hollow body by rotational moulding, followed by filling the hollow body with expanded polyurethane.

Description

The characteristics and advantages of the present invention will be apparent from the ensuing detailed description of one embodiment thereof, illustrated by way of non-limiting example in the accompanying drawings, in which:

FIG. 1 is a schematic view of a seat seen in profile;

FIG. 2 is a schematic view of a seat seen from above;

FIG. 3 is a schematic view of an alternative embodiment of a seat seen in profile.

Claims

1-12. (canceled)

13. A method for producing a hollow body, comprising the steps of obtaining a hollow body by rotational moulding, then filling said hollow body with expanded polyurethane.

14. A method as claimed in claim 13, wherein the step of obtaining a hollow body by rotational moulding comprises the use of a thermoplastic material.

15. A method as claimed in claim 13, wherein the step of obtaining a hollow body by rotational moulding comprises the use of a material having an MFR (melt flow rate) of between about 2 g/10 min and about 15 g/10 min.

16. A method as claimed in claim 13, wherein the step of obtaining a hollow body by rotational moulding comprises the step of obtaining said hollow body in combination with elements for fixing said hollow body to structures external thereto.

17. A method as claimed in claim 13, further comprising the step of forming a single hole for communication between said hollow body and the outside, usable for said step of filling said hollow body with expanded polyurethane.

18. A method as claimed in claim 13, further comprising the step of forming a series of small holes to enable air to escape during the step of filling said hollow body with expanded polyurethane.

19. A method as claimed in claim 17, further comprising the step of closing said holes on termination of the filling step.

20. A method as claimed in claim 18, further comprising the step of closing said holes on termination of the filling step.

21. An article composed of a one-piece hollow body of thermoplastic material filled internally with expanded polyurethane.

22. An article as claimed in claim 21, wherein said hollow body comprises a single hole for the insertion of said expanded polyurethane.

23. An article as claimed in claim 21, wherein said hollow body has a thickness variable of from about 0.5 to about 10 mm.

24. An article as claimed in claim 21, wherein said article is a seat.

25. An article as claimed in claim 21, wherein said article is a sanitary appliance for a bathroom.