Method and machine for producing a hollow product

Abstract

A method and injection machine for producing a hollow product, such as a urisheath, use of the method for producing a urisheath as well as the urisheath. The machine comprises an annular cavity for receiving a silicone material. The material is injected in a cold state via a coldrun nozzle and cured by heat in the cavity. The cavity has a narrow cross-sectional area over a substantial portion of the cavity and the cavity is connected to a venting area. The cavity has an annular enlarged portion at the proximal portion of the cavity, arranged adjacent said inlet and a groove at the distal portion of the cavity. The narrow cross-sectional area has a decreasing radial dimension towards the distal portion of the cavity. The surface of the cavity is grit blasted.

1 . An injection molded urisheath comprising a cylindrical portion having first and second ends, a tip portion disposed at the first end, and a push rim disposed to protrude radially outwardly from the tip portion. 
     
     
         2 . The urisheath according to  claim 1 , having an outer roll rib disposed at about the second end of the cylindrical portion. 
     
     
         3 . The urisheath according to  claim 2 , wherein the cylindrical portion has a reduced thickness as the second end is approached. 
     
     
         4 . The urisheath according to  claim 3 , wherein the surface of the urisheath is roughened. 
     
     
         5 . The urisheath according to  claim 2 , wherein the surface of the urisheath is roughened. 
     
     
         6 . The urisheath according to  claim 1 , wherein the surface of the urisheath is roughened. 
     
     
         7 . An injection molded urisheath comprising a cylindrical portion having first and second ends, a tip portion disposed at the first end, and an outer roll rib disposed at about the second end of the cylindrical portion. 
     
     
         8 . The urisheath according to  claim 7 , wherein the cylindrical portion has a reduced thickness as the second end is approached. 
     
     
         9 . An injection molded urisheath comprising a cylindrical portion having first and second ends, a tip portion disposed at the first end, and the cylindrical portion has a roughened surface.