Method of producing patterned shaped article using scraper

Details Method of producing patterned shaped article using scraper Method of producing patterned shaped article using scraper

1995-04-24

1997-09-02

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

056628471

DESCRIPTION:

BRIEF SUMMARY
TECHNICAL FIELD

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.


BACKGROUND 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 pattern and do not become unsightly even when expose to surface abrasion, using at least one means for folding the material selected from among an auxiliary from corresponding to the pattern to be exposed (in Japanese Patent Laid-Open Application Nos. 4-105903, 5-38707, 5-38708 and 5-238767), a cell body consisting of cylindrical bodies of a set height (in Japanese Patent Laid-Open Application Nos. 4-140104, 4-139083, 5-847157 and 5-84714), and a bristling body (in Japanese Patent Laid-Open Application Nos. 4-345803, 5-324068, 5-327816 and 5-237821).
The object of the present invention is to provide a method of producing shaped articles expressing various patterns such as patterns of lines of various thicknesses.


DISCLOSURE OF THE INVENTION

For achieving the aforesaid object, the present invention provides a method of 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, charging a cavity thus formed with a different type of dry particles, and allowing the particles to set into an integral mass, either as they are or after being overlaid with a backing course.
The present invention also provides a method of 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 while at the same time removing particles by suction, charging a cavity thus formed with a different type of dry particles, and setting the particles into an integral mass, either as they are or after being overlaid with a backing course.
Thus, as in accordance with the method of this invention a dry particle course formed on a base surface is raked and the cavity thus formed is filled with a different type of dry particles, line patterns of a desired thickness can be formed by using a suitably shaped scraper.
The above and other features of the present invention will become apparent from the following description made with reference to the drawings.


BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view showing a first example of a shaped article produced according to the invention.
FIGS. 2(a), 2(b) and 2(c) show perspective views of three examples of scrapers used in the method of this invention.
FIG. 3 illustrates how the scraper is moved to form the shaped article of FIG. 1.
FIGS. 4(a) and (b) are sectional views along line X--X of FIG. 3 illustrating cavity formation and filling with different particles.
FIG. 5 is a plan view of a second sha

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