Plastic and nonmetallic article shaping or treating: processes – Vacuum treatment of work
Patent
1995-08-18
1997-10-21
Czaja, Donald E.
Plastic and nonmetallic article shaping or treating: processes
Vacuum treatment of work
264112, 264122, 264138, 264139, 264239, 264241, 264344, B29C 6702
Patent
active
056792980
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a method for producing patterned concrete shaped articles, patterned artificial stone shaped articles, patterned raw products for sintering into ceramic shaped articles, patterned ceramic shaped articles, patterned metal shaped articles, patterned impasto shaped articles, patterned plastic shaped articles, patterned shaped foodstuffs and other such patterned shaped articles, using a scraper.
2. Discussion of the Related Art
Up to now the only way available for providing a part of a surface, such as of paving blocks, with a pattern indicating a pedestrian crossing, a stop sign or Other such traffic sign or for providing the entire surface of the blocks with a pattern has been to paint the surface with a coating material such as paint or to inlay the desired pattern.
Since the patterns painted on a part or all of the surface of paving blocks are exposed to abrasion such as from the footwear of pedestrians walking on the blocks, and the tires of vehicles driving over them, they quickly wear off and have to be redone at frequent intervals. The amount of labor involved in this work is considerable. Where the pattern is formed by inlaying, the work itself is troublesome and very costly.
The present inventors previously proposed methods for readily producing various types of patterned shaped articles which do not lose their surface patterns and do not become unsightly even when exposed to surface abrasion, using at least one means for holding the material selected from among an auxiliary form corresponding to the pattern to be expressed (in Japanese Patent Application KOKAI Nos. 4-105903, 5-38707, 5-38708 and 5-238767), a cell form consisting of cylindrical cell bodies of a set height arranged in a contiguous manner (in Japanese Patent Application KOKAI Nos. 4-140104, 4-139083, 5-847157 and 5-84714), and a bristling form consisting of densely bristling projections (in Japanese Patent Application KOKAI Nos. 4-345803, 5-324068, 5-237816 and 5-237821).
The present inventors further proposed a method for producing a patterned shaped article comprising the steps of forming a dry particle course on a base surface, moving a scraper located at a prescribed position above the base surface in accordance with a pattern to be expressed, thereby scraping the dry particle course, charging a cavity thus formed with a different type of dry particles, and allowing the particles to set into an integral mass (Japanese Patent Application No. 5-229642 and International Patent Application No. PCT/JP94/01397).
The object of this invention is to provide a method of rapidly producing with ease shaped articles precisely expressing various patterns such as patterns of lines of various thicknesses.
SUMMARY OF THE INVENTION
The present invention provides a method of producing a patterned shaped article comprising the steps of forming at least two superposed courses of different dry particles on a base surface, moving a scraper located at a prescribed position above the base surface in accordance with a pattern to be expressed so as to scrape at least the lowermost course, allowing the dry particles of the upper course to cave into a cavity thus formed, thereby expressing the pattern on the bottom surface of the lowermost course, and allowing all the particles to set into an integral mass, either as they are or after the top surface of the uppermost course is made even or overlaid with a backing course.
The present invention also provides a method of producing a patterned shaped article comprising the steps of forming at least two superposed courses of different dry particles on a base surface, moving a scraper located at a prescribed position above the base surface in accordance with a pattern to be expressed so as to scrape at least the lowermost course while at the same time removing the particles of at least the lowermost course by suction, allowing the dry particles of the upper course to cave into a cavity thus formed, thereby expressing the pattern on t
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Onuki Mituhiro
Uchida Hiroshi
Watanabe Hideo
CCA Inc.
Czaja Donald E.
Vincent Sean
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