JPH0253194B2 - - 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> Wet sanders that grind and polish workpieces by supplying cleaning liquid to the surface of a sanding belt are disclosed in Japanese Patent Publication No. 49-3438, Japanese Patent Publication No. 51-43237, and Japanese Utility Model Publication No. 59-1983.
It is publicly known as disclosed in No.-42839 and the like.
These are intended to moisten the surface of the sanding belt with a cleaning liquid and cool it to improve the surface of the sanding belt, and to remove polishing debris adhering to the belt surface.

<Problems to be solved by the invention> By the way, all of these conventional devices
A cleaning liquid is supplied to the outer surface of a water-impermeable sanding belt made of resin film or the like as a base material, and a removal roll, removal belt, etc. is attached at a position in front of the belt in the running direction, and the liquid is applied to the surface of the belt. The structure was such that the material was squeezed out 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.

An object of the present invention is to provide a cleaning device that can effectively remove polishing debris.

<Means for Solving the Problems> The present invention uses a water-impermeable endless sanding belt that is made by attaching abrasive grains to the surface of a base material such as cloth or resin film. but,
This is made of a water-permeable nonwoven fabric belt, and
A cleaning liquid supply section consisting of a plurality of liquid jet nozzles arranged in a row in the belt running direction with the mouth end facing the inner surface of the belt is disposed inside the linear running section of the endless sanding belt, and the processing material is discharged from the cleaning liquid supply section. An air injection section consisting of a plurality of air nozzles arranged in a row in the belt running direction with the mouth end facing the inner surface of the belt is disposed in the straight running section up to the grinding part, and the cleaning liquid supply section and the air This device is characterized in that a liquid recovery duct is provided on the outside of the injection part so as to cover the belt surface.

<Function> The endless sanding belt is made of a water-permeable nonwoven fabric belt, and the cleaning liquid is allowed to permeate from the inside to the outside of the belt, so that the abrasive debris stuck between the abrasive grains on the belt surface is moved outward by the cleaning liquid. be swept away. 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.

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 water permeability due to the voids between the fibers.

In this configuration, a plurality of liquid injection nozzles are arranged in a row in the belt running direction with their mouth ends facing the inner surface of the belt inside the straight running part between the drive roll 7 and the steering tension roll 9 to supply cleaning liquid. and an air injection section 16 comprising a plurality of air nozzles arranged in a row in the belt running direction with the mouth ends facing the inner surface of the belt.
Further, a cleaning liquid supply section 15 and a liquid recovery duct 17 are disposed opposite to each other on the outside of the air injection section 16 so as to cover the belt surface.

In such an apparatus, the material conveying belt 4 is run, and the endless sanding belt 10 is caused to run by the driving roll 7 to supply the workpiece to the material conveying path, and the cleaning liquid is supplied from the spray nozzle of the cleaning liquid supply section 15. leak. Due to the water permeability of the endless sanding belt 10, the cleaning liquid passes through the belt 10 from the inside to the outside, is discharged to the surface side of the workpiece, and is collected into the liquid collection duct 17.

The endless sanding belt 10, which has been further moistened by being supplied with the cleaning liquid, is injected with pressurized air from the inside by the air injection section 16. Therefore, the cleaning liquid remaining in the fiber pores of the belt 10 is pushed outward by the pressure of the pressurized air, is received by the liquid recovery duct 17, and is recovered from its discharge port. 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.

Through this process, the endless sanding belt 1
0 is in a wet state, cooled, and subjected to wet grinding and polishing to beautifully polish the surface of the workpiece.

In FIG. 2, a cleaning liquid supply section 23 and a first air injection section 24 are sequentially arranged inside the ascending section (on the right side in the figure) of the belt 10, and the descending section (on the left side in the figure).
A second air injection section 25 is disposed inside the air. A first liquid recovery duct 26 covers the cleaning liquid supply section 23 and the first air injection section 24 on the surface side of the ascending section, and covers the second air injection section 25 on the surface side of the descending section. A second liquid recovery duct 27 is provided. In this configuration, the first air injection section 24 discharges most of the cleaning liquid inside the endless sanding belt 10, and the second air injection section 25 further removes residual polishing debris and residual liquid inside the endless sanding belt 10. remove. In this case, the endless sanding belt 10 is therefore essentially dry below the pressure pad 6 and can be well adapted to grinding and polishing workpieces which would be disadvantageous if moisture were present.
The air injection parts 24 and 25 are provided on the left and right 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, a running steering device, etc. (not shown). This is because there are various attachments and there is a limit to the attachment space, and the attachment cannot be placed only on one side.

In addition, in such a configuration, the air injection section 2
4 and 25 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 on 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, by placing the material feeding interval on the material feeding device 1,
A grinding drive roll 30 is arranged at the bottom, and a steering tension roll 31 is arranged directly above it.
A grinding and polishing device 33 is disposed in which an endless sanding belt 32 made of a water-permeable nonwoven fabric belt is stretched between the belts 0 and 31.

In this configuration, the cleaning liquid supply section 37 and the air injection section 38 are arranged in a vertical direction inside the vertical running section on the rising side of the endless sanding belt 32, and the cleaning liquid supply section 37 and the air injection section 38 are arranged in a row in the vertical direction. Part 38
A liquid recovery duct 39 is disposed in front of the vertical running section so as to cover the vertical running section.

In this device, the material conveying belt 4 is run,
When the belt 32 is run and the workpiece is supplied to the workpiece passage, the workpiece is subjected to heavy grinding under the grinding drive roll 30. During this process, the endless sanding belt 32 is moistened by being supplied with the cleaning liquid by the cleaning liquid supplying part 37, and pressurized air is injected from the inside by the air injection part 38, so that the endless sanding belt 32 remains in the fiber vacancies of the belt 32. The cleaning liquid is pushed outward by air pressure, received by the liquid recovery duct 39, and recovered from its discharge port. By forcibly discharging the cleaning liquid and allowing air to pass through the endless sanding belt 32, polishing debris can be removed even more effectively.

FIG. 4 shows 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 is passed between the front and rear material feeding rolls, one of which is a driving roll, and the left and right driving rolls 46 and driven rolls 47 are placed on the material feeding device 40, which has an upper horizontal running part as a material feeding part. , an endless sanding belt 48 made of a water-permeable nonwoven fabric belt
The basic configuration is that the grinding and polishing devices 4, which are made by hanging the two, are arranged orthogonally opposite each other with a feed interval.

Also, an endless sanding belt 48 that serves as a grinding section.
Inside the lower running part of the belt 4 is placed on the top surface of the workpiece.
Pressing cylinders 50 for pressing 8 are arranged in rows in the left-right direction. A cleaning liquid supply section 55 consisting of a plurality of liquid jet nozzles arranged in a row in the width direction is arranged near the exit of the grinding section of the endless sanding belt 48, and further, a cleaning liquid supply section 55 is arranged in which pressurized air is A first air injection section 56 consisting of a nozzle is provided, and a second air injection section 5 is provided on the grinding section entrance side.
7 are installed.

Further, liquid recovery ducts 60a and 60b are provided on the left and right sides of the material feeding device 40, respectively, and one liquid recovery duct 60a covers the cleaning liquid supply section 55 and the first air injection section 56 from the lower surface of the belt, and the other liquid recovery duct 60a covers the cleaning liquid supply section 55 and the first air injection section 56 from the lower surface of the belt. The duct 60b covers the second air injection section 57 from the lower surface of the belt. Furthermore, the liquid recovery duct 6
In order to prevent the cleaning liquid from scattering from 0b to the material feeding device 40 side, a shielding plate 61 is disposed inside it, and the mouth end of the air nozzle of the second air injection section 57 is directed in a direction opposite to the running direction of the belt 48. I'm trying to direct it.

In such an apparatus, the material conveying belt 43 is run, and the endless sanding belt 48 is caused to travel in a direction perpendicular to the material conveying belt 43 by the driving roll 46, thereby supplying the workpiece to the material conveying path. When the end of the processed material comes directly under the grinding and polishing device 45,
The pressing cylinder 50 is driven to extend, and the pressing pad 51 at the tip thereof is brought into pressure contact with the inner surface of the endless sanding belt 48, and the cleaning liquid is jetted from the liquid jet nozzle of the cleaning liquid supply section 55.

Through this process, the endless sanding belt 48
The material becomes wet and cooled, and wet grinding is performed to cleanly grind the surface of the workpiece. In addition, polishing debris attached to the surface of the endless sanding belt 48 is
The cleaning liquid is supplied from inside and removed by air injection, and the liquid is collected together with the cleaning liquid through the liquid recovery ducts 60a and 60b.
recovered by.

The endless sanding belt 48 has a long grinding section, and abrasive debris is particularly likely to accumulate near its exit. Therefore, in this embodiment, the cleaning liquid is resupplied to the belt 48 by the cleaning liquid supply section 55, and the cleaning liquid is discharged from the belt 48 by pressurized air at the air injection sections 56 and 57, and the polishing debris is discharged. This is to improve the quality even better. Only one of the air injection parts 56 and 57 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 also applicable to the bottom surface grinding and polishing type. It is possible.

<Effects of the Invention> As described above, the present invention includes an endless sanding belt made of a water-permeable nonwoven fabric belt, and
Since the cleaning liquid is allowed to permeate from the inside to the outside of the endless sanding belt, polishing debris adhering to the surface of the sanding belt can be effectively removed, and therefore the grinding and polishing by the sanding belt can be carried out as much as possible. It can be applied beautifully. 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 an embodiment of the present invention, and Figures 1 and 2 are schematic side views of an embodiment in which the present invention is applied to a vertical grinding belt sander using a tread pad, respectively;
FIG. 3 is a schematic side view of an embodiment in which the present invention is applied to a vertical grinding belt sander using grinding rolls. Further, FIG. 4 is a schematic longitudinal sectional side view of an embodiment in which the present invention is applied to a horizontal grinding type belt sander machine. 1,40...Material feeding device, 5,33,45...Grinding and polishing device, 10,32,48...Endless sanding belt, 15,23,37,37,55...
Cleaning liquid supply section, 16, 24, 25, 38, 56,
57... Air injection part, 17, 26, 27, 3
9, 60b...Liquid recovery duct, 50...Press cylinder.

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 section consisting of a plurality of liquid jet nozzles arranged in a row in the belt running direction with the mouth end facing the inner surface of the belt is provided inside the linear running section of the endless sanding belt. An air injection section consisting of a plurality of air nozzles arranged in a line in the belt running direction with the mouth end facing the inner surface of the belt is arranged in the straight running section at a position from the cleaning liquid supply section to the workpiece grinding section. A belt cleaning device for a belt sander, characterized in that a liquid recovery duct is disposed opposite to the cleaning liquid supply section and the air injection section so as to cover the belt surface.