| 摘要 |
<p>PCT No. PCT/GB82/00098 Sec. 371 Date Nov. 26, 1982 Sec. 102(e) Date Nov. 26, 1982 PCT Filed Mar. 31, 1982 PCT Pub. No. WO82/03358 PCT Pub. Date Oct. 14, 1982.A method of manufacturing a thermally insulated building block (54a) comprises foaming a quantity of foamable plastics material in an enclosed space (56) between a building block (54) and a closure means (52), the quantity of material being sufficient to fill the enclosed space (56). The foamable material may be injected into a cavity in the block onto an outer surface of the block (54) or onto the closure means (52) prior to locating the block (54) and closure means (52) relative to each other to form the enclosed space (56) therebetween. The block (54) is transported between upper and lower parallel endless belts (55, 50) during foaming and either belt (55, 50) may provide the closure means (52). If the lower belt (50) provides the closure means (52) the upper belt (55) maintains the block (54) in contact with the closure means (52) during foaming.</p> |
