Abrading – Abrading process – Utilizing shield
Patent
1993-05-26
1995-07-25
Rose, Robert A.
Abrading
Abrading process
Utilizing shield
451 38, 451442, B24C 104
Patent
active
054357705
ABSTRACT:
Screening techniques are used to form a patterned mask on a surface of a wood article, and particle blasting is used to transfer the pattern of the mask to the wood article. A screen on procedure that employs a 50-80 mesh material on which a reverse image pattern of 200 microns or thicker of capillary film allows a high definition pattern of masking material to be applied in one pass. Disruption of the mask from moisture emanating from the wood article is prevented by either painting the surface of the wood article prior to screening on the masking material or by including a water scavenging compound with the masking material. If paint is to be employed as a moisture barrier, the paint must be able to withstand curing temperatures for the masking material. Spherical glass beads are preferably used for particle blasting since they leave a better finish for the pattern transferred to the wood article and do not adversely degrade the wood fibers. Woods, such as Western Red Cedar, Ponderosa Pine, Fir, and Redwood, can be easily patterned by the particle blasting and provide enhanced wood grain definition.
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