| 摘要 |
Linear extruded profiles used in the manufacture of window and door frames, have become the standard in the industry. The current state of the art in applyin g finishing coatings to the visible surfaces of the extrusion profiles, is a process known as "Capstocking". In this extruding method, a thin layer of molten coloured plastic is applied to the surfaces in a continuous ongoing process, and emerges from the extruder as finished produc t. This technology was implemented when the cost of materials was considerably less than what i t is now, making it an expensive and less than a cost effective process at this time. An economical method of applying finishing coatings to extruded profiles today, is with the traditional spraying process. This is a growing trend in the industry made possible by the development of very durable and versatile water based coatings, specifically engineered to be applied to plastic and non-metallic surfaces. Currently, there are many automated spraying systems on the market, but they do not target the extruded profiles market that has emerged over the last decade or so.
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