Mold for manufacture of bodies for transporting units

Claim 1

Apparatus for the manufacture of a body having a bottom, at least four side walls, at least one door, and a roof for isothermal transport units, such as refrigerated or heated trucks, trailers, railway cars and the like, comprising a single pair of molds consisting of an internal mold and an external mold for molding a main structure comprising the bottom, the side walls, and at least one door opening of the body in a single monocoque part, the main structure external mold comprising: a bottom panel; side wall panels; plates for the bottom and the side wall panels having an internal face with relief corresponding to the desired external configuration of the body, and external faces having reinforcing ribs; means for securing the bottom panel plates to each of the side wall panel plates; a double rim on the upper edge of the side panel plates comprising (i) an inner rim having an upper section inclined to the plate and a lower stepped section and (ii) an external flat horizontal rim; orifices through the lower stepped section of the inner rim of the double rim of the side panel plates for injection of molding material; spaced apart bolt holes through the extended horizontal rim of the double rim of the side panel plates for securing the external mold to the internal mold; and at least one rectangular door opening through the side panel plates having a size, configuration and location desired for a door of the body; the main structure internal mold comprising a substantially prismatic box having an open top for the internal mold, wherein the box comprises: an outer surface with relief corresponding to the desired internal configuration of the body; sides having rectangular openings extending to and through the bottom of the box, the openings corresponding to openings in the side panels of the external mold; an inclined flat circumferential ribbon around the top of the box; spaced apart orifices through the circumferential ribbon for injection of molding materials located so the injection orifices of the main body external mold and the main body internal mold are aligned when the main body external and internal molds are assembled; a horizontal peripheral rim extending from the circumferential ribbon for suspending the internal mold on the extended horizontal rim of the double rim of the external mold; and spaced apart holes through the horizontal peripheral rim for securing the internal mold to the external rim of the side panel of the external mold so that the walls and bottom of the prismatic box are suspended away from the bottom and side panels of the main body external mold when the main body external and internal molds are assembled.