Patent Application
20050281956
1. Field of Invention
The invention relates to a thermal spraying method for manufacturing an anti-sliding plate and, in particular, to a method producing high wear-resistant and high heat-resistant anti-sliding plates of various roughnesses.
2. Related Art
In the prior art, methods for manufacturing an anti-sliding plate mainly include applying polymeric anti-sliding lacquer (for example, epoxy resin), and thermal spraying metal or nonmetal directly on a plate. Said lacquer applying technology has very limited usage due to the low selectiveness of materials, the difficulties of construction and repair, and short lifespan.
Thermal spraying technology has advantages of fast producing and no need for curing. The wear-resistant performance of a thermal spraying product is 5 times better than a lacquer applying product. Besides, the thermal spraying product is 14% lighter than the lacquer applying product. However, conventional anti-sliding plates only have slight roughness. For instance, the arc thermal spraying, aluminum (Al) anti-sliding plates used on the US Navy naval vessels have little roughness of 200˜300 μm (Proceedings Of The 1993 National Spray Conference, pp. 445-450).
Therefore, it is necessary to provide a new manufacturing technology for anti-sliding plates to solve the problems of the conventional thermal spraying method.
In view of the foregoing, an objective of the invention is to provide a new thermal spraying method for producing an anti-sliding plate with high roughness.
To achieve the above objective, the disclosed method comprises the following steps. (a) Provide a plate. The plate is selectively of metal, for example iron (Fe), aluminum (Al) or zinc (Zn), or of plastic such as ABS, PP or PE. (b) Provide a mask located upon the plate with a specific height between 0.1-10 mm. And 1˜3 mm is better. The mask has plural openings. Each of the openings has a curvature radius less than 0.5 mm. (c) Provide a thread material. The thread material is selectively of metal such as aluminum (Al), molybdenum, tin (Sn), zinc (Zn), nickel (Ni), nickel alloy or stainless steel, or of nonmetal such as ceramics or ceramic metal. (d) Thermal-spray the thread material from the upper side of the mask by an arc thermal spraying device or a flame thermal spraying device to deposit the thread material through the openings of the mask to the plate under the mask to form a anti-sliding plate with plural anti-sliding spots.
The invention can effectively control the height, the amount and the distribution of the anti-sliding spots by using the mask to make a partial area of the plate without depositing the melt thread material. Moreover, anti-sliding plates of various roughnesses can be provided by adjusting the distance between the mask and the plate, the shape and size of the openings of the mask, the thermal-spray distance and the feeding speed of the thread material.
The invention will become more fully understood from the detailed description given hereinbelow illustration only, and thus are not limitative of the present invention, and wherein:
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This embodiment is almost the same as embodiment 2. The stamped porous mask 40 is still positioned upon the iron (Fe) plate 21 with a distance of 2 mm. The only difference is that a stainless steel thread is used and the measured roughness is 2,000 μm (Rmax). The anti-sliding plate 10 obtained in this embodiment has an excellent wear-proof advantage to have various applications in broad scopes.
This embodiment is almost the same as embodiment 2. The only difference is that an ABS plastic plate and a zinc (Zn) thread with low melt point are used and the measured roughness is 2,000 μm (Rmax). The anti-sliding plate obtained in this embodiment is capable of applying as anti-sliding ground bricks.
According to the thermal spraying method of manufacturing anti-sliding plate disclosed in the invention, the stamped porous mask 40 is used to make a partial area of the plate 21 without depositing the melt thread material. Therefore, it is very easy to produce anti-sliding plates with the roughness of more than 3001 μm, even 2,000 μm. Besides, the amounts and the distributions of anti-sliding spots 31 and 32 can be controlled in very efficient way.
Certain variations would be apparent to those skilled in the art, which variations are considered within the spirit and scope of the claimed invention.
