| 摘要 |
The invention is related to different articles manufacturing methods, which include especial composites with cellulose nature fibres filament as reinforcement as well plastics replacement, considering also the uses of gas or gas-water assisted injection, in order to reach the articles with hollow reinforcement ribs. By optimizing the reception of composites, it is possible to increase the filament level of the fibres, keeping still good flow properties, reduce the manufacturing cycle time, as mentioned composites has the properties of crystallization at higher temperatures. The composites will better bio-destruct when landfilled, and because of especial receptions of the composites, uses of gas or gas- water assisted injection moulding is less limited in manufacturing of the articles with hollow structures within the article. Uses of hollow reinforcement ribs reduce the weight of the articles, as providing higher strength of the article, and increase overall physical-mechanic properties of the articles thereby. The same time, high level fibres filament (above 40%) uses in plastic matrices has low flow properties to be used in combination with gas or gas- water assisted injection moulding, especially, if the reinforcement ribs has complex curved configuration. This problem particularly is solved by especial properties of the compounds offered. This problem is also fully solved by using plastic co-injection in forming process of hollow channels with gas or gas-water assisted injection moulding, as co-injected plastic before gas or gas-liquid injection is forming the protective layer within a channel. As the result, the absorption character of the composites is reduced, and it is possible to form more long,complex nature, hollow channels, using high level filament (above 40% and more) of the organic, also mineral fibres, in plastic matrix based composites. |
