JPH02265702A - Surface processing method for bamboo cylinder - Google Patents

Abstract

PURPOSE:To raise the productivity, moreover, make it be obtained beautiful finish without requiring skills by covering a rubber state elastic film on the surface of the semiproduct of a natural bamboo, and giving desired patterns and sculptures in projecting abrasive grains via through hole bored thereon. CONSTITUTION:A semiproduct 1 is placed in a dust collecting case 4, next, a rubber state elastic film 2 is wound around the surface of the semiproduct 1 in putting hands inside thereof, and held by fingers so as not to be released therefrom. And, a tool 3 is put in an unoccupied hand, and a trigger 3c is then pulled in facing the injection orifice 3d into the through hole 2a provided on the elastic film 2, so that abrasive grains (g) as cut grains together with air are injected at high speed, and processing is started at the same time. That is, a part of abrasive grains (g) injected from the injection orifice 3d wears away the surface of the semiproduct 1 passing through the through hole of the rubber state elastic film 2 in order to form a recessed part 1c, and the remaining parts thereof are sprang back by the rubber state elastic film. Accordingly, only part of the through hole 2a is cut away and the part covered with the rubber state elastic film 2 is not subjected to any cut by abrasive grains (g), thus, a natural surface is maintained as it is. Therefore, desired patterns and sculptures can be made up on the surface of the semiproduct 1.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for surface processing a bamboo tube suitable for manufacturing brush holders and flower vases in which the surface of natural bamboo is decorated with carvings.

[Conventional technology]

Brush holders and flower vases have been manufactured for a long time, with beautiful natural bamboo surfaces and carvings and patterns that further enhance their commercial value. Traditionally, the processing has often been done manually using a chisel or a chisel, but in recent years it has been carried out using NC-type woodworking machines to save labor.

[Problem to be solved by the invention]

When this type of decorative processing is done manually, productivity is low;
Moreover, it is expensive because it requires considerable skill to produce a large number of identical products. In addition, in recent years, production has been progressing in developing countries where labor costs are low, but the technology is not as good, and in order to avoid such disadvantages, the introduction of NC-type wood processing machines is being considered. The price of the machine itself is high, and its marketability is easily lost.

[Means to solve the problem]

This invention is a method for surface processing a bamboo tube, which aims to solve the above-mentioned problems and provide a production method for efficiently producing bamboo products with an excellent appearance at a low cost. The process is characterized in that a rubber-like elastic membrane with perforations is wrapped around the outer surface of the natural bamboo workpiece, and hard cutting particles are mixed in compressed air and projected at high speed.

[Effect]

The surface of the product made of natural bamboo that is to be finished or carved is covered with an elastic membrane, except for the processing areas, and the cutting particles mixed in the compressed air are projected at high speed. At other locations, the projected cutting particles collide with the rubber-like elastic membrane and are bounced back, leaving the desired engraving on the surface of the bamboo tube without cutting the elastic membrane or the product made of natural bamboo. is made rigid.

〔Example〕

Hereinafter, the present invention will be explained with reference to the illustrated embodiment. In Fig. 2, l is a product made of natural bamboo that is to be used as a brush holder or a flower stand, and the knot 1a is the bottom and the opening 1 at the top is
Brush and flowers are added to b.

To decorate the surface of such a product with irregularities,
A rubber-like elastic membrane 2 with a pattern (crescent shape in this embodiment) cut into its surface is used. That is, a through hole 2a punched in a desired shape on the surface of the product 1.
The elastic membrane 2 provided with the This is done by Knee, tool 3
As shown in FIG. 1, this is an air tool that blows the abrasive grains g, which are the cutting grains, at high speed using compressed air, and includes a hopper 3a containing the abrasive grains g, and an air hose 3b connected to a compressed air source. is provided. 3c is a trigger for injecting air and abrasive grains g. FIG. 3 shows the overall structure of an apparatus using such a tool 3. That is, the product 1 and the pneumatic tool 3 are placed inside a dust collection box 4 having a transparent glass 14a on its upper surface.

Next, the processing method using this device will be described. First, the product 1 is placed in the dust collection box 4, and then a hand is placed inside and a rubber-like elastic material [2] is wrapped around the surface of the product 1. Hold it with your fingers so it doesn't unravel. Then, holding the tool 3 in your free hand, point the nozzle 3d into the through hole 2a provided in the elastic membrane 2, and pull the trigger 3c.Abrasive grains g, which are cutting particles, are injected together with air at high speed, and machining begins. be done. That is, as shown in FIG. 1, a part of the abrasive grains g injected from the nozzle 3d pass through the through holes 2a of the rubber-like elastic membrane 2 and scrape the surface of the product l, forming a recess 1c, and the remaining part It is bounced back by the rubber-like elastic membrane 2. Therefore, only the portion of the through hole 2a is cut, and the portion covered by the rubber-like elastic membrane 2 is not cut by the abrasive grains g, and the natural surface is maintained. Therefore, a desired pattern or engraving is created on the surface of the product 1.

Note that the present invention is not limited to the engraving of patterns as described above; for example, as shown in FIG.
Needless to say, it can also be used for chamfering the opening of the product 1 by covering it with.

〔Effect of the invention〕

As described above, this invention covers the surface of a product made of natural bamboo with a rubber-like elastic film 2, and projects abrasive grains g through holes 2a formed therein to create a desired pattern or engraving. Therefore, compared to cutting using a knife or chisel, productivity is higher and a beautiful finish can be expected without requiring any skill. Further, since there is no need to use an expensive NC type woodworking machine, there is an effect that the cost of the product can be maintained at the same low level as in the past.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which Fig. 1 is a sectional view showing the processing state, Fig. 2 is an external view of the product, Fig. 3 is a side view showing the processing state, and Fig. 4 is a cross-sectional view showing the processing state. FIG. 2 is a sectional view corresponding to FIG. 1 showing a modification. 2...-Elastic membrane, 2a--Through hole, 3--Tool, 4...-Dust collection box, Patent applicant
Shirayanagi Isao Figure 1 Figure 3 Figure 114

Claims (1)

[Claims] Bamboo tubes are made by wrapping a rubber-like elastic membrane with holes in the pattern to be carved around the outer surface of the natural bamboo workpiece, and then mixing hard cutting particles in compressed air and projecting them at high speed. surface treatment method.