JPH08118228A - Method for finishing woodwork and polishing device for woodwork - Google Patents

Abstract

PURPOSE: To efficiently polish a front surface material of flat or irregularly engraved building materials, fittings, furnitures. CONSTITUTION: On the upper part of a material feeding device a rotary sanding device 1 is provided upstream of it while a belt sanding device 2 is provided downstream of it. A rotary brush-like paper sander 8 wherein a plurality of sand papers in which rectangular flaps are radially and projectingly formed are stacked is inserted into the rotary-type sanding device, and an endless fabric sandpaper sheet 14 wherein a thick nonwoven fabric wherein abrasive grains are deposited on its front surface is stuck on the base member cloth (or paper) is laid in the belt sanding device, and a cubic or flat surface of a wood material is polished with one process.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polishing method and a polishing apparatus in a working process from plate polishing to color finishing of a plate.

[0002]

2. Description of the Related Art Surface materials such as building materials, fittings, furniture, etc., which are cut from wood and cut, engraved, etc. are colored by painting. The coloring process is performed in the following order. Has been done. Bare wood adjustment Wood whose surface has been cut or carved is polished by hand or by a grinder such as a belt sander. Coloring of bare wood, which is mainly made for sealing the bare wood, and is a water-based or oil-based coloring paint, a wiping coloring paint,
Appropriate one of solvent stain paint or sealer colorant is selected and applied by brush painting or spray painting. Sanding sealer application This is a process of applying an undercoat paint that can be ground and polished to the colored surface of the bare wood. The urethane resin paint is mainly applied by brushing or spraying. Polishing sanding sealer No. 320 to No. 4
Polish with No. 00 sandpaper. This process is performed manually or with a conventional belt sander (wide sander). Intermediate coloring Paint to obtain a color tone according to the application. Finish Topcoat Apply clear lacquer etc. to obtain surface gloss.

The polishing in the above process is carried out manually or by a conventional machine such as a belt sander or a brush sander. Various types of such polishing machines are known, and a device relating to the improvement has been invented. For example, in Japanese Patent Laid-Open No. 4-223860, the sanding belt in the conventional machine is wavy in the width direction, and it is assumed that vertical streak-like polishing unevenness occurs on the surface of the processed material. A tread pressure pad is placed inside the endless sanding belt, and this belt grinding device is movable in the direction orthogonal to the material feeding direction.
This is to obtain smoothness in surface grinding.

A finish grinder for woodworking in which a roll brush sander is arranged in a direction orthogonal to the feeding direction is also known in the art, and is partially formed of two plastic fibers such as nylon for feeding material. Two roll brushes are arranged in front of and behind the running direction, one of the roll brush sanders is rotated in the up-cut direction, and the other is rotated in the down-cut direction to improve the grinding effect ( JP-A-3-92261) and the like.

[0005]

Conventional wood finishing machines for woodwork include belt sanders, roll brush sanders, and cup-shaped brush sanders. Each of these is selected and used according to the purpose. For example, a belt sander is applied to surface grinding, and naturally cannot be applied to a three-dimensional engraved object. The roll brush sander can be used to grind and polish the surface of wood with some irregularities, but the corners of the wood and the corners of the three-dimensional pattern are ground better than the flat surface, which causes sagging at the edge part and the sanding sealer application surface This results in unevenness. Naturally, it was impossible to grind the side and bottom surfaces of the deep engraved portion such as the groove.

In addition, fine fluff remains on one surface of the wood surface that has been adjusted (polished), and when the wood is colored as described above, the fluff is lifted up by the solvent contained in the paint, and the further process The fluff becomes thicker and stands out because of the adhesion of the sanding sealer applied in. This fluff could not be removed sufficiently with a roll brush sander.

[0007]

SUMMARY OF THE INVENTION According to the present invention, a vertically movable main spindle device is arranged at an upper part of an upstream side of a vertically movable material feeding device, and an outer member which is rotated by respective motors hung from the main spindle device and A rotary sanding device in which six working spindles that rotate via an bevel gear are radially provided on an inner spindle, and two upper and lower rollers are axially supported in the upper part on the downstream side in a direction orthogonal to the material feeding direction. It is a double-type polishing machine equipped with a belt sanding device that spans over a plurality of sandpapers. ) Are set as a set with two flanges at predetermined intervals and are fitted and inserted into the working spindle. One of the belt sanding devices has abrasive grains attached to an elastic substrate. With a fabric sand belt, the wood placed on the material feeding device is processed by radial sandpaper on the upstream side of the flat plate as well as the uneven wood surface, the side surface of the engraved depression and All of the bottom surface is polished, and then the fabric sandpaper is deformed in accordance with the uneven shape of the wood to perform surface polishing.

[0008]

The six working spindles radially protruding from the lower part of the outer spindle hanging from the main shaft device rotate about their axes by the rotation of the outer spindle,
Further, the rotation of the inner spindle engages with the bevel gear at the lower end of the inner spindle. One to three working spindles that rotate with their own bevel gears engage with the bevel gears fitted to the adjacent working spindles and reversely rotate. Since it has a structure that conducts in a shape, the fluff of wood is polished from the front, back, left, and right, and no fluff remains. Also,
Radial strips of sandpaper come into contact with the bottom and side surfaces of the engraved portion as the wood rotates, and have the effect of polishing to the deep end.

Further, since the flexible fabric sandpaper and the sponge sander are easily deformed along the gentle unevenness of the wood surface and can be uniformly finished and polished, the appearance exposed to human eyes is It will have a more beautiful effect. The rotary brush sanding device and the belt sanding device are provided in one machine, and the polishing of a three-dimensional surface and a flat surface can be performed in one step.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A woodworking polishing machine and polishing method according to the present invention will be described with reference to the drawings. A material feeding device 20 in which a conveyor belt 22 having a large number of small-diameter air holes 22h is stretched around rollers 20a and 20b axially supported at both ends thereof is a handle 21 engaged with a screw driving device (not shown).
It is arranged on the upper part of the machine base 30 so as to be able to move up and down by turning. The intake case 2 is provided on the back side of the upper side of the conveyor belt 22.
3 is installed in sliding contact with the back surface of the conveyor belt, and one end thereof is connected to a suction device such as a vacuum pump or an exhaust fan (not shown).

A rotary sanding device 1 and an endless belt sanding device 11 are arranged side by side above the material feeding device 20 from the material feeding side. The rotary sanding device 1 includes a handle 3 which is engaged with a screw drive (not shown) on a column 2 provided on a machine frame 31.
It is mounted so that it can be raised and lowered freely. An outer spindle 5 and an inner spindle 6, which are rotated by respective motors 5r and 6r, are inserted into the main spindle device 4, and below the outer spindle 5, six working spindles 7 that radiate in a circumferential direction, 7 ... is the shaft support 5s ...
Have been. A bevel gear 6g is fitted to the lower end of the inner spindle 6, and a small-diameter bevel gear 7g meshing with the bevel gear 6g is fitted to one to three working spindles 7. Further, bevel gears 7h, 7h, ... For transmitting rotation to the adjacent working spindles 7 are fitted to all of these working spindles 7.

In the rotary sanding device having the above structure, the outer spindle 5 is rotated by the drive of the motor 5r, and the working spindle 7 supported by the outer spindle 5 is rotated in the circumferential direction. The inner spindle 6 and the bevel gear 6 fitted to the lower end of the inner spindle 6 are driven by the motor 6r.
g rotates, and the bevel gear 7g meshing with the bevel gear 6g rotates the operating spindle 7a. Further, bevel gears 7h, 7h ...
Thus, the adjacent operating spindles 7, 7 are interlocked with each other and rotate in opposite directions. Therefore, the following rotary brush-shaped paper sander 8 attached to the paper feeding device 20
Rotate in the horizontal direction and rotate in the vertical and horizontal directions above.

The working spindle 7 of this kind is shown in FIG.
As shown in (b), two sets of sandpaper S each having a shaft hole 8a and having strip-shaped strips 8b radially projecting from the periphery thereof are set as a set, and their back surfaces are brought into contact with each other. Then, the rotary brush-like paper sander 8 is stacked and fitted and inserted (FIG. 3A).
In this paper sander, the abrasive grain surface does not face the rotation circumferential direction of the sander but faces the axial direction. In addition, the rotary brush paper sander 8 is the operating spindle 7
A rotary brush paper sander, either laminated above or separately, may be mounted through the working spindle. Further, a conventional brush roll sander can be attached to the working spindle 7 for use.

The belt sanding device 11 is a frame 3
1, rollers 12 and 13 are rotatably supported by a bearing (not shown) formed at appropriate intervals in the vertical direction, and a motor 12r is mounted on one of the rollers 12 or 13 via a transmission device 12b such as a belt. Connected. Elastic cloth 14b formed thickly with non-woven fabric
Is laid on a cloth (paper) cloth 14a, and the endless fabric sandpaper 14 in which abrasive grains 14c are applied and adhered to the surface of the non-woven cloth is laid over the rollers 12 and 13. Of course, it is also possible to hang ordinary endless sandpaper on the rollers 12 and 13.

The hood 9a provided above the roll brush-shaped paper sander 8 and the hoods 9b and 9c provided above the belt sanding device and above the discharge port are ducts for sucking and discharging the polishing powder of the wood generated by the respective sanding devices. It is joined to the dust collector (not shown). Further, a material feeding port 32 is provided on the material feeding side, and a discharge port 33 is provided on the discharging side, and a brush or a roll brush 10 for scraping off the polishing powder is installed above the discharge port 33.

The use and polishing method of the wood working polishing machine of the present invention having the above structure will be described according to the wood coating process. First, the first step is bare wood adjustment. The height of the material feeding device 20 is adjusted by the handle 21 to the extent that the paper surface of the belt sanding device 2 contacts the material to be polished w, and then the tip of the strip of the paper sander 8 of the rotary sanding device 1 is the material to be polished. It is adjusted by rotating the handle 3 so as to come into contact with the innermost end of the engraving surface. Next, when wood is inserted from the material feeding port 32, the intake case 2
The material w to be polished is suction-fixed to the conveyor belt 22 through the ventilation holes 22h by the suction force of the vacuum pump or the exhaust fan connected to the nozzle 3. In this state, the material to be polished w reaches the lower part of the rotary sander device 1, and the radial strips of the rotary brush-shaped paper sander 8 are used not only on the wood surface but also on the engraved side surface of the duck, the sill groove, the door engraved decorative plate, or the like. Grind even into the bottom. In this case, the paper sander 8 is not the surface on which the abrasive grains adhere, but the side surface of the paper strongly hits the material to be polished, and this is the feature of this polishing device. This is a big difference from the fact that the abrasive grain adhering surface is in contact with the material w in a plane.

Then, the wood to be polished w is transferred under the belt sanding device 11 using the endless fabric sanding belt 14. Since the surface of the endless fabric sanding belt 14 is elastic as described above, the endless fabric sanding belt 14 is well adapted to the slight unevenness of the surface of the wood and is polished. When the unevenness of the wood surface is more severe, the roller 13 is replaced by the sponge roller 1 having a slight elasticity.
Use 2s (Fig. 6). This sponge roller 12s
Is produced by foaming rubber or polyolefin plastic.

In the second step, the coloring of bare wood is carried out by a brushing method or a spraying method as described above for coloring with an aqueous or oily paint, wiping coloring or solvent stain coloring. In the conventional process, a sandable sealer which can be further polished is applied on the colored surface. Applying the sanding sealer immediately after coloring the bare wood in this way means that the conventional grinding and grinding machine for woodwork cannot handle uneven surfaces and that the edge of wood is ground more strongly and the edge is shaved off a lot to the wood surface. This is because it may cause deformation and uneven color, and therefore, it can be polished only after applying a sealer that withstands sanding well. However, when the water-based or oil-based paint is applied, the fluff of the wood floats up, and the paint adheres to the fluff and becomes more conspicuous. As described above, even if the sanding sealer is applied in such a state and then polished, it is difficult to remove fuzz and a beautiful surface finish cannot be obtained. Therefore, it is the current situation that after coloring the bare wood, the paper is manually hung to remove the fluff to some extent.

The rotary sanding apparatus 1 of the present invention
It has become possible for the first time to polish the bare wood coloring with almost no shaving after the bare wood coloring is applied, before applying the sanding sealer. This is because, as described above, the roll brush-shaped paper sander 8 makes it possible to uniformly polish both the flat surface and the three-dimensional surface of the material w to be polished by directly contacting the side surface of the abrasive grain surface without directly contacting the wood. In this case, it is important to select the grain size of the sanding paper 8 and the grain size number of the grain is 180 to 1000, preferably 240 to 600, although it depends on the material of the wood to be polished. A roll brush sander formed of conventional plastic fibers can also be used for fluff removal in this step, but it does not reach the polishing ability of the roll brush-shaped paper sander 8 according to the present invention. The belt sanding device 11 is not used in the polishing process after coloring the bare fabric.

Next, the wood w coated with the sanding sealer, which is the above-mentioned step, is placed again on the material feeding device 20 of the polishing apparatus for woodworking of the present invention, and re-mounted by the rotary sanding device 1 and the belt sanding device 11. Grind.

Further, intermediate coloring is applied, and clear lacquer or the like is applied to finish as furniture or a building member.

[0022]

INDUSTRIAL APPLICABILITY In the wood including a three-dimensionally engraved surface by adopting the above-mentioned polishing step by the wood-polishing apparatus of the present invention, particularly the method of polishing the wood surface after the wood coloring with the rotary brush type paper sander A good finished surface without fuzz can be obtained. As a result, the manual polishing process is omitted and the working time is shortened.

By using the rotary sanding device of the present invention, it is possible to uniformly polish both the flat surface and the engraved surface, so that it is possible to reduce the coating thickness such as bare wood coloring and sanding sealer coating.

Since a rotary sanding device and an endless belt sanding device are provided side by side in the feeding direction of the wood to be polished, the three-dimensional surface and the flat surface can be polished by one machine and in one process, and the work efficiency can be improved. .

In the conventional roll brush sander, the abrasive grain adhering surface of the paper is attached directly to the wood surface, that is, the paper surface is mounted parallel to the rotation axis. Easy,
Moreover, there was no restoration and the service life was short. On the other hand, the paper sander of the present invention, which is a roll brush formed by laminating sandpaper radially projecting strips around the shaft hole, has an abrasive grain adhering surface in the rotation axis direction and a paper side surface in the circumferential direction. Because it is heading, it is more rigid and has a longer service life than conventional ones.

By using an endless fabric belt sander in which a thick elastic non-woven fabric is attached to a fabric and abrasive grains are applied to the non-woven fabric surface, it is possible to sufficiently polish a wood surface having a slight uneven pattern. It was By using the sponge roller 13s, it is possible to cope with a deeper uneven pattern.

[0027]

[Brief description of drawings]

FIG. 1 is a side view of a woodworking polishing apparatus according to the present invention.

FIG. 2 is a plan view of a cross section of a main part showing a sanding device.

FIG. 3 is a side view (a) of a partial cross section showing a state in which a roll brush-shaped paper sander is attached to a spindle, and a front view (b) of a single paper sander.

FIG. 4 is a perspective view showing an example of a method for manufacturing a single paper sander.

FIG. 5 is a perspective view showing the shape of fabric sandpaper.

FIG. 6 is a perspective view of a sponge roller.

[Explanation of symbols]

 1 Rotary Sanding Device 2 Column 4 Main Spindle Device 5 Outer Spindle 6 Inner Spindle 7 Working Spindle 8 Roll Brush Paper Sander 11 Endless Belt Sanding Device 14 Endless Fabric Sandpaper 20 Feeding Device 22 Conveyor Belt 30 Machine Unit

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[Procedure amendment]

[Submission date] October 31, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] 0002

[Correction method] Change

[Correction content]

[0002]

2. Description of the Related Art Surface materials such as building materials, fittings, furniture, etc., which are cut from wood and cut, engraved, etc. are colored by painting. The coloring process is performed in the following order. Has been done. (1) Bare wood adjustment Wood whose surface has been cut or processed such as engraving is ground manually or by a grinder such as a belt sander. (2) Coloring of bare wood This is mainly for sealing the bare wood, and a brush is selected by selecting an appropriate water-based or oil-based coloring paint, wiping coloring paint, solvent stain paint or sealer coloring agent. It is done by painting or spray painting. (3) Sanding sealer application (2) In the step of applying an undercoat paint that can be ground and polished to the colored surface of the bare wood, the urethane resin paint is mainly applied by brushing or spraying. (4) Polishing The sanding sealer coated surface is polished with No. 320 to No. 400 sand paper. This process is manual or conventional belt sander (wide sander)
Is being done in. (5) Intermediate coloring Paint to obtain a color tone according to the application. (6) Finishing topcoat Apply clear lacquer or the like to obtain surface gloss.

Claims (6)

[Claims] 1. A vertically movable main spindle device is disposed on the upstream side of an upper part of a vertically movable material feeding device, and the main spindle device has 6 units.
The six operating spindles are inserted into each other by rotating an outer spindle which radially supports the operating spindles and a part of the operating spindles, and an inner spindle having a transmission device, which is rotated by a motor. It features a rotary sanding device that is linked with a device and a roll brush is mounted on its operating spindle, and a belt sanding device that connects two rollers with an endless sand belt is installed downstream. Polishing device for woodworking. 2. Sandpaper in which a shaft hole is opened and strips radially projecting around the shaft hole are formed into two sets each having a non-abrasive surface, and a plurality of sandpapers are formed. A rotary brush type paper sander that is laminated at intervals. 3. A plurality of sandpapers, each of which is formed by radially projecting strips around a shaft hole, are attached to an operating spindle of a rotary sanding device at a slight interval. Polishing equipment for woodworking. 4. An endless fabric sandpaper made by sticking a thick non-woven fabric having abrasive grains adhered on its surface onto a base cloth (paper) is laid over a belt sanding device. Polishing equipment for woodworking. 5. A rotary brush type paper sander in which a plurality of sandpapers having a grain size number of 240 to 400 in which a shaft hole is opened and strips are radially projected around the shaft hole are laminated at a slight interval. A method of polishing a wood surface that is colored by wiping or the like using a mounted rotary sanding device. 6. The polishing method according to claim 4, wherein the wood after coloring the bare wood is polished using a rotary sanding device equipped with a roll brush sander in which plastic fibers are radially aligned and formed.