teto para cabine de veÍculo, e, processo para moldar um teto com corpo oco plÁstico de uma sà peÇa

A one piece rotational molded roof for a vehicle cab is provided in which separate inlet ducts (20) and outlet air ducts (34) are molded in the roof. The ducts (20, 34) are formed by molding upper and lower panels (14, 16) that are widely spaced to form the ducts (20, 34) and which are closely space...

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Bibliographische Detailangaben
Hauptverfasser:	SHAWN MICHAEL BARTZ, DEAN ARDEN BOYCE, BRUCE KEVIN FRYK
Format:	Patent
Sprache:	por
Schlagworte:	ARRANGEMENTS OR ADAPTATIONS OF HEATING, COOLING, VENTILATING,OR OTHER AIR-TREATING DEVICES SPECIALLY FOR PASSENGER OR GOODSSPACES OF VEHICLES LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS MOTOR VEHICLES PERFORMING OPERATIONS TRAILERS TRANSPORTING VEHICLES IN GENERAL
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Beschreibung
Zusammenfassung:	A one piece rotational molded roof for a vehicle cab is provided in which separate inlet ducts (20) and outlet air ducts (34) are molded in the roof. The ducts (20, 34) are formed by molding upper and lower panels (14, 16) that are widely spaced to form the ducts (20, 34) and which are closely spaced about the periphery of the ducts (20, 34). After a solid surface layer is molded, a second resin charge containing a foaming agent is dropped in the mold. This resin coats interior of the solid surface layer and later foams. The foam expands and extends completely between the closely spaced upper and lower panels of the solid surface layer to seal between the inlet and outlet air ducts (20, 34). The foam is rigid to strengthen the roof.