JPH0240474B2 - - Google Patents

Description

Detailed Description of the Invention <Industrial Application Field> The present invention relates to a belt sander machine that uses a sanding belt to grind and polish the surface of metal, resin, wood, etc. The present invention relates to a belt cleaning device for removing debris.

<Prior art> A wet sander machine supplies cleaning liquid to the surface of an endless sanding belt to grind and polish the workpiece.
It is well known as disclosed in Japanese Patent Publication No. 49-3438, Japanese Patent Publication No. 51-43237, and Japanese Utility Model Application Publication No. 59-42839. These systems supply cleaning liquid from the surface of the sanding belt to moisten and cool the surface to improve the polished surface of the workpiece and to remove polishing debris attached to the belt surface. .

<Problems to be solved by the invention> By the way, all of these conventional devices are
A cleaning liquid was supplied to the outer surface of an impermeable sanding belt made of a resin film or the like as a base material, and a removal roll, removal belt, etc. was attached at a position in front of the belt in the running direction, and the cleaning liquid was applied to the belt surface. The structure was such that the liquid was removed from the surface. For this reason, the abrasive debris stuck between the abrasive grains on the belt surface receives liquid pressure, roll pressure, or belt pressure from the surface, and is constantly subjected to an inward force on the belt, and the effect of that force itself is This has the effect of pushing the polishing debris between the abrasive grains, and for this reason, the polishing debris could not be removed sufficiently.

Furthermore, since the liquid is scraped off from the surface of the belt by physical contact, the removal of the liquid is incomplete and the surface remains constantly wet, making it easy for the liquid to run down the surface and fall. As a result, there is a problem that the processed material gets wet and its surface gets contaminated.
This method cannot be applied to some processed materials. In addition, if you want to increase the liquid removal rate,
There is a limit because it is necessary to strongly press a spatula or the like against the belt surface side, which increases wear on the belt surface and impedes the running of the endless sanding belt.

<Means for Solving the Problems> The present invention uses an impermeable endless sanding belt that is made by attaching abrasive grains to the surface of a base material such as cloth or resin film. The sanding belt is made of a breathable non-woven fabric belt, and a cleaning liquid supply section consisting of a plurality of liquid spray nozzles for supplying cleaning liquid to the surface is disposed on the surface side of the linear running part of the endless sanding belt. An air injection section consisting of a plurality of air nozzles arranged in a vertical direction with the mouth end facing the inner surface of the belt is disposed in the straight running section from the cleaning liquid supply section to the workpiece grinding section, and the air injection section A liquid recovery duct is provided on the outside of the belt so as to cover the surface of the belt.

The breathable nonwoven fabric belt is made breathable by applying abrasive grains to the surface of a nonwoven fabric made of nylon fiber or the like.

<Function> In addition to supplying the cleaning liquid to the surface of the endless sanding belt, pressurized air is also circulated from the inside to the outside of the breathable nonwoven fabric belt, so that the cleaning liquid can remove the abrasive debris stuck between the abrasive grains on the belt surface. The cleaning liquid is discharged into the liquid recovery duct together with the cleaning liquid by the pressurized air. Therefore, polishing debris can be removed well.

At this time, the cleaning liquid is supplied and removed by pressurized air before reaching the grinding part of the workpiece, and is collected in the liquid recovery duct, so that it is possible for the liquid to adhere to the workpiece at the grinding part. effectively prevented.

<Example> An example of the present invention will be described with reference to the accompanying drawings. It should be noted that the same parts among the constituent parts of each embodiment are indicated by the same reference numerals.

FIG. 1 shows the present invention applied to a vertical grinding type belt sander using a tread pad.

That is, the grinding and polishing device 5 is fed onto the material feeding device 1, which has a material feeding belt 4 wrapped around the front and rear material feeding rolls 2 and 3, one of which is a drive roll, and the upper horizontal running section serving as the material feeding section. The grinding and polishing device 5 has a basic configuration in which the materials are placed opposite each other with a gap between them. An endless sanding belt 10 made of a nonwoven fabric belt is wrapped around the roll group. The workpiece is then ground and polished by the endless sanding belt 10 at the grinding portion of the workpiece where the pressing pad 6 is located.

This non-woven fabric belt is made by applying high quality abrasive grains to the surface of a non-woven fabric made from nylon fiber etc.
It has air permeability due to the voids between the fibers.

In this configuration, an air injection section 20 consisting of a plurality of air nozzles arranged in a vertical direction with the mouth end facing the inner surface of the belt is disposed inside the straight running section of the belt 10 in the upward direction, and further A wide-mouthed liquid recovery duct 21 is provided outside the air injection section 20 so as to cover the surface of the belt 10, and the opening end is placed within the duct at a position rearward of the air injection section 20 in the belt running direction. A cleaning liquid supply section 22 consisting of a plurality of liquid jet nozzles directed toward each other is provided.

In this embodiment, the endless sanding belt 10 is driven by the driving roll 7 to supply the workpiece to the material feeding path, and the cleaning liquid is supplied from the spray nozzle of the cleaning liquid supply section 22 to the belt surface. The cleaning water from this spray nozzle may be sprayed as pressurized water, or may simply be dripped by a positional water head. By supplying the cleaning liquid, the surface of the endless sanding belt 10 becomes wet and cooled. Pressurized air is then injected from the inside of the endless sanding belt 10 by the air injection section 20. Therefore, the cleaning liquid containing polishing debris remaining on the surface of the belt 10 is pushed outward by the pressure of the pressurized air that has passed through the fiber cavities of the belt 10, and is received by the liquid collection duct 21. It is collected from the outlet. By forcibly discharging the cleaning liquid and allowing pressurized air to pass through the endless sanding belt 10, polishing debris can be removed even better. Further, the cleaning liquid is collected in the liquid recovery duct 21, so that a small amount of the cleaning liquid adheres to the surface of the belt running from the air injection section 20. Then, at the grinding part of the processed material, an endless sanding belt 10
Since the workpiece is kept in a relatively dry state, wetting of the workpiece is prevented as much as possible, and the workpiece can be well adapted to grinding and polishing of the workpiece, which would otherwise be disadvantageous if moisture adhered thereto.

FIG. 2 shows a cleaning liquid supply section 30 and a first air injection section 31 arranged sequentially on the outside of the ascending section (on the right side in the figure) of the belt 10, and the first air injection section 31 on the inside of the ascending section (on the left side in the figure). Second air injection part 32 inside
is arranged. A first liquid recovery duct 33 is provided on the surface side of the ascending linear traveling section, and includes a cleaning liquid supply section 30 and covering the first air injection section 31 via the belt 10. A second liquid recovery duct 34 is provided on the front surface side of the second liquid recovery duct 34 so as to cover the second air injection section 32 .

In such a configuration, the first air injection section 31 discharges most of the cleaning liquid within the endless sanding belt 10, and the second air injection section 32 further removes residual polishing debris and residual liquid within the endless sanding belt 10. Remove. Therefore, in this case, the endless sanding belt 1 is
0 is an almost dry state, and wetting of the processed material can be further prevented.

The air injection parts 31 and 32 are provided on the left and right straight running parts of the endless sanding belt 10, respectively, because the rolls 7, 8, and 9 are equipped with a support frame, a tension cylinder, and a travel steering device (not shown). This is because there is a limit to the mounting space due to various attachments such as, and it cannot be placed only on one side.

In addition, in such a configuration, the air injection section 3
1 and 32 may be opened and closed differently to enable selective use. Through such control, the pressure can be adjusted depending on the adhesion state of sanding debris to the surface of the endless sanding belt 10 and the wet state. The amount of air to be injected can be adjusted, allowing efficient air injection.

FIG. 3 shows the present invention applied to a vertical grinding type belt sander machine using a grinding roll.

That is, on the material feeding device 1, a grinding drive roll 40 is arranged at the bottom with a material feeding interval, and a steering tension roll 41 is arranged directly above the grinding drive roll 40, and the rollers 4
A grinding and polishing device 43 is disposed in which an endless sanding belt 42 made of a breathable nonwoven fabric belt is stretched between the belts 0 and 41.

In such a configuration, an air injection section 50 is disposed inside the straight running portion of the endless sanding belt 42 in the upward direction, and further, an air injection section 50 is provided outside the air injection section 50 so as to cover the surface of the belt 42. A wide-mouth liquid recovery duct 51 is provided, and a cleaning liquid supply section 52 is disposed within the duct at a position rearward of the air injection section 50 in the belt running direction.

Its operation is the same as that of the embodiment shown in FIG. 2, except that heavy grinding is performed by the grinding drive roll 40, and therefore will not be described here.

4 and 5 show the present invention applied to a horizontal grinding type belt sander machine which runs a sanding belt in a direction perpendicular to the material feeding direction and performs heavy grinding of a processed material.

That is, a material feeding belt 63 is wrapped around the front and rear material feeding rolls 61 and 62, one of which is a driving roll, and the left and right driving rolls 64 are placed on a material feeding device 60 in which the upper horizontal straight running section is configured as a material feeding section. The basic configuration is such that a grinding and polishing device 66, which is made up of a driven roll 65 and an endless sanding belt 67 made of a breathable nonwoven fabric belt, is disposed orthogonally opposite to each other at a feed interval.

Also, an endless sanding belt 67 that serves as a grinding section.
A pressing cylinder 68 for pressing the belt 67 against the upper surface of the workpiece is located inside the lower straight running part of the belt.
They are arranged in rows from left to right.

Furthermore, on the left and right parts of the endless sanding belt 67 separated from the material conveying belt 63, a first air injection part 70 is provided on the inner surface of the belt on the right side.
However, a second air injection section 71 is also disposed on the left side, and collection ducts 72 and 73 are provided at the left and right lower portions of the material feeding device 60, respectively. is covered from the bottom surface of the belt, and the second air injection section 71 is covered from the bottom surface of the belt by the other recovery duct 73.

Further, a cleaning liquid supply section 75 consisting of a plurality of liquid jet nozzles arranged in a row along the belt running direction is disposed in the upper linear running section of the endless sanding belt 67.

In the apparatus configured as described above, the material conveying belt 63 is run, and the endless sanding belt 67 is caused to travel in a direction perpendicular to the material conveying belt 63 by the driving roll 64, thereby supplying the workpiece to the material conveying path. . When the end of the workpiece comes directly under the grinding and polishing device 66, the pressing cylinder 68 is driven to extend, and the pressing pad 69 at the tip thereof is pressed against the inner surface of the endless sanding belt 67, and the cleaning liquid supply section 75 A cleaning liquid is supplied from the air jetting section 70, and pressurized air is jetted from the air jetting sections 70 and 71.

Through this process, the endless sanding belt 6
7 is brought into a wet state by the cleaning liquid supply section 75 and cooled, and the endless sanding belt 67
Polishing debris adhering to the surface is removed by air injection parts 70, 7.
1, it is dissipated outward by pressurized air and collected together with the air into the collection ducts 72, 73.

Only one of the air injection parts 70 and 71 may be provided.

In each of the above embodiments, the case of the top surface grinding and polishing type was explained, but the relationship between the grinding and polishing device and the material feeding device is not limited, and therefore, the present invention is applicable even to the bottom surface grinding and polishing type. Applicable.

<Effects of the Invention> As described above, the present invention forms an endless sanding belt with a breathable nonwoven fabric belt, and
Since the cleaning liquid is supplied to the surface of the endless sanding belt and the pressurized air is passed through the belt from the inside to the outside, polishing debris adhering to the surface of the sanding belt can be effectively removed. Therefore, the sanding belt can perform grinding and polishing as beautifully as possible. In addition, before reaching the grinding part of the workpiece, the cleaning liquid is supplied, the cleaning liquid is blown away by air, and the cleaning liquid is collected by the recovery duct in sequence, so the endless sanding belt is kept in a relatively dry state. It has excellent effects such as preventing the processed material from getting wet.

[Brief explanation of drawings]

The accompanying drawings show embodiments of the present invention, and Figures 1 and 2 are schematic side views of the first and second embodiments in which the present invention is applied to a vertical grinding type belt sander using a tread pad, respectively, and Figure 3 is a schematic side view of the first and second embodiments of the present invention. This is a schematic side view of a third embodiment in which the present invention is applied to a vertical grinding type belt sander using a grinding roll. 4 and 5 show a fourth embodiment in which the present invention is applied to a horizontal grinding type belt sander machine, FIG. 4 being a schematic longitudinal sectional side view, and FIG. 5 being a schematic plan view. 1, 60... Material feeding device, 5, 43, 66... Grinding and polishing device, 10, 42, 67... Endless sanding belt, 22, 30, 52, 75... Cleaning liquid supply section, 20, 31, 32 ,50,70,71...
...Air injection part, 21, 33, 34, 51, 7
2,73...Recovery duct.

Claims (1)

[Scope of Claims] 1. A belt sander comprising a material feeding device and a grinding and polishing device formed by extending an endless sanding belt around a plurality of rolls, which are arranged opposite to each other via a material feeding path, comprising: The belt is formed of a breathable non-woven fabric belt, and a cleaning liquid supply unit consisting of a plurality of liquid jet nozzles that supplies cleaning liquid to the surface is disposed on the surface side of the linear running part of the endless sanding belt, and the cleaning liquid is supplied. An air injection section consisting of a plurality of air nozzles arranged vertically with the mouth end facing the inner surface of the belt is arranged in the straight running section at a position from the section to the workpiece grinding section. A belt cleaning device for a belt sander machine, characterized in that a liquid collection duct is provided on the outside so as to cover the belt surface.