| 摘要 |
<p>An apparatus and process for forming a multi-coloured integral vinyl skin shell including a heated mould (32) and dual powder box arrangement wherein the mould is formed to include alternately positioned tear surfaces (34) and recessed surfaces (36). After the first powder box (42) supplies a layer of powder to cover all the surfaces to form a shell, the strips of shell on the tear surfaces (34) are removed, after which the first powder box (42) is replaced by a second powder box (50). The second powder box (50) has a plurality of spaced dams or dividers (52) formed therein such that the dams co-operate with the respective recessed surfaces (36) of the mould to provide clearance therewith that permit different coloured powders in the compartments (72) between the dams to cover the previously cleared tear surfaces and to flow past the selectively formed free ends of the dams to become integrally secured to the adjacent edge portions of the shell segments remaining in the areas of the recessed surfaces of the mould, forming the multi-coloured integral plastic shell. The dams or dividers (52) have tapered sides (54) formed on their distal ends for approximately the outer two thirds of the width of each dam, and an opening (56) is formed therebetween into a central hollow section for recovering "contaminated" or mixed powders from two adjacent compartments (72).</p> |
