| 摘要 |
<p>PURPOSE:To continuously form a pipe route covering construction material which crushes a pipe route by heat for shutting off flames and smoke by such an arrangement wherein the raw material of an expansion layer is caused to adhere to the outer circumference of a tubular element and is dried, and a strip of base material is wound around its outer circumference and the material of protective film is coated and dried. CONSTITUTION:A tubular element 3 is formed by throwing in plastic raw material 2 in the hopper 1A of a protrusion forming machine 1. The tubular element is cooled by a cooling tank 4 and moved in the direction of an arrow by pulling rolls 5, 5, and in the painting machine 6, raw material paste 7 of an expansion layer which expands by heat is discharged from a hopper 6A and caused to adhere to the outer circumference of the tubular element 3. Next, the raw material paste 7A on the outer circumference of the tubular element 2 is dried by heating, ventilation and drying process in a drier 8 and an expansion layer 7 is formed. Next, a strip of base material 9 which substantially does not expand or contract is wound around the outer circumference of the expansion layer 7 and a protective film forming material 14A is coated on the outer circumference of the base material 9 by spray painters 13, 13 in a painting room 12 and it is dried by heating, ventilation and drying process by a drier 5 and a protective film 14 is formed to produce a pipe route covering construction.</p> |
