JPH0240473B2 - - Google Patents

Description

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

<Problems to be Solved by the Invention> When grinding and polishing workpieces that need to be avoided from getting wet, a dry belt sander that does not use a cleaning liquid or the like is used.

In the belt sander, the abrasive debris generated by the grinding and polishing is usually collected by a suction duct whose mouth end is opposite to the outer surface of the belt, in order to purify the surrounding atmosphere. However, although it is possible to collect the abrasive debris dispersed in the air using the duct, it is extremely insufficient to remove the abrasive debris that is stuck between the abrasive grain surfaces of the sanding belt. As a result, the surface of the sanding belt tends to become clogged and the polished condition of the workpiece is likely to deteriorate, resulting in the disadvantage that the sanding belt must be replaced frequently.

In order to remove clogging on the surface of the sanding belt, a method of injecting pressurized air onto the belt surface may be considered, but this method has the disadvantage that the wiped off abrasive debris will be dispersed in the air, worsening the working environment. be.

SUMMARY OF THE INVENTION An object of the present invention is to provide a cleaning method for easily removing abrasive debris stuck on the belt surface of a dry belt sander.

<Means for Solving the Problems> The present invention uses a non-porous endless sanding belt that is made by attaching abrasive grains to the surface of a base material such as cloth or resin film. However,
In addition to forming this with a breathable nonwoven fabric belt,
An air injection section consisting of a plurality of air nozzles arranged along the inner surface of the belt is disposed inside the linear running section of the endless sanding belt, and an air injection section consisting of a plurality of air nozzles arranged along the inner surface of the belt is disposed, and an air injection section is provided on the outside of the sanding belt opposite to the injection section. A collection duct is disposed in the belt, and pressurized air injected from the air nozzle is circulated from the inside to the outside of the belt to remove abrasive debris from the belt surface.

The nonwoven fabric belt is made of a nonwoven fabric made of nylon fiber or the like and coated with abrasive grains on the surface to make it breathable.

<Function> Since the endless sanding belt is made of a breathable non-woven fabric belt, and pressurized air is circulated from the inside to the outside of the belt, the abrasive debris stuck between the abrasive grains on the belt surface is moved outward with the air. being pushed out. The extruded polishing debris is then collected by the collection duct.

Therefore, polishing debris can be effectively removed without generating dust or the like in the surrounding area.

<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 nonwoven fabric belt is made by applying high-quality abrasive grains to the surface of a nonwoven fabric made of nylon fiber or the like, and has air permeability due to the voids between the fibers.

In such a configuration, an air injection section 12 consisting of a plurality of air nozzles whose mouth ends are directed toward the inner surface of the belt 10 is disposed inside the ascending straight running section (right side in the figure) of the endless sanding belt 10. be done.

Also, a belt 10 is provided outside the air injection section 12.
A collection duct 13 is provided to cover the surface, and a mouth end 15 of a suction hopper 14 communicating with a vacuum pump is provided near the drive roll 2.

In such an apparatus, after the material conveying belt 4 is run and the endless sanding belt 10 is caused to run by the drive roll 7, the processed material is supplied to the material feeding path. Thereafter, approximately in synchronization with the tip of the workpiece reaching the lower part of the press pad 6, pressurized air is injected from the injection nozzle of the air injection section 12 and the vacuum pump is driven.

As a result, the workpiece is placed at the bottom of the pressing pad 6.
Grinding and polishing is performed by an endless sanding belt 10. This grinding and polishing produces polishing debris, but
The polishing debris dispersed in the air is collected by the suction hopper 1.
It is collected from the mouth end 15 of 4.

Furthermore, the polishing particles adhering to the surface of the endless sanding belt 10 are removed by the air injection section 12. That is, the pressurized air injected onto the inner surface of the belt by the air injection part 12 is
Due to the air permeability of 0, it flows from the inside to the outside and flows out to the collection duct 13 side. At this time, the polishing debris adhering to the belt surface is pushed outward and collected into the collection duct 13 together with the pressurized air.

In FIG. 2, a first air injection section 20 is installed inside the upward linear running section (on the right side in the figure) of the belt 10, and a second air injection section 21 is installed inside the downward linear running section (on the left side in the figure). They are arranged respectively. and,
A first recovery duct 23 is installed on the surface side of the ascending side straight running section so as to cover the first air injection section 20, and a second air injection section 21 is installed on the surface side of the descending side straight running section so as to cover the first air injection section 20.
A second collection duct 24 is provided so as to cover the.

In such a configuration, the air injection parts 20, 2
1, polishing debris on the surface of the endless sanding belt 10 is removed in stages. In this way, the air injection parts 20 and 21 are arranged on the left and right running parts of the endless sanding belt 10, respectively, because the rolls 7 and
This is because there are various attachments such as a support frame, tension cylinder, travel steering device, etc. (not shown) in the interiors 8 and 9, and there is a limit to the attachment space, and it is impossible to arrange them only on one side.

In addition, in such a configuration, the air injection section 2
0 and 21 may be opened and closed differently to enable selective use. Through such control, pressurized air is ejected in accordance with the state of adhesion of sanding debris to the surface of the endless sanding belt 10. The amount can be adjusted, allowing efficient air injection.

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

That is, on the material feeding device 1, a grinding drive roll 30 is placed at the bottom and a steering tension roll 31 is placed directly above the grinding drive roll 30 with a material feeding interval, and a breathable nonwoven fabric belt is placed between the rolls 30 and 31. A grinding and polishing device 33 formed by an endless sanding belt 32 is provided.

In this configuration, an air injection section 34 consisting of a plurality of air nozzles arranged in a vertical direction with the mouth end facing the inner surface of the belt is provided inside the linear running section on the descending side of the endless sanding belt 32. .

Also, a belt 32 is provided outside the air injection section 34.
A recovery duct 35 is provided to cover the surface, and a mouth end 37 of a suction hopper 36 that communicates with a vacuum pump is provided near the grinding drive roll 30.

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 surface of the workpiece is touched by the grinding drive roll 3.
At the bottom of 0, heavy grinding is performed by an endless sanding belt 32.

The abrasive debris generated at the bottom of the grinding drive roll 30 and dispersed in the air is collected at the mouth end 37 of the suction hopper 36.
recovered from.

Furthermore, polishing debris adhering to the surface of the endless sanding belt 32 is removed by the air injection section 34. That is, the air is injected from the air injection unit 34, pushed outward by the pressurized air flowing from the inside to the outside of the belt 32, and collected into the collection duct 35.

In the above structure, the air injection section 34 may be provided inside the straight running section on the ascending side of the endless sanding belt 32, or may be provided on both the descending side and the ascending side as shown in FIG. Good too.

5 and 6 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 43 is wrapped around front and rear material feeding rolls 41 and 42, one of which is a driving roll, and left and right driving rolls 44, Driven roll 4
5, a grinding and polishing device 47 formed by wrapping an endless sanding belt 46 made of a breathable non-woven fabric belt.
The basic configuration is that the two are orthogonally arranged opposite each other with a feeding interval.

Also, an endless sanding belt 46 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 48 for pressing 6 are arranged in rows in the left-right direction.

Furthermore, in the left and right straight running parts of the endless sanding belt 46 separated from the material conveying belt 43, a first air injection part is provided on the inner surface of the belt on the right side, in which a plurality of air nozzles are arranged in a row along the running direction. 50, a second air injection section 51 is also disposed on the left side, and recovery ducts 52, 5
3 are provided at the left and right lower portions of the material feeding device 40, respectively,
One recovery duct 52 covers the first air injection part 50 from the bottom surface of the belt, and the other recovery duct 53
covers the second air injection part 51 from the lower surface of the belt.

Further, on the material conveying belt 43, at the inlet and outlet of the grinding and polishing device 47 for the processed material, mouth ends 54, 54 of suction hoppers communicating with a vacuum pump from above, respectively, are arranged.

In such an apparatus, a material conveying belt 43 is run, and an endless sanding belt 46 is caused to travel in a direction perpendicular to the material conveying belt 43 by means of the drive roll 44, thereby supplying workpieces to a material conveying path. When the end of the processed material comes directly under the grinding and polishing device 47,
The pressing cylinder 48 is driven to extend, and the pressing pad 49 at the tip thereof is brought into pressure contact with the inner surface of the endless sanding belt 46, and pressurized air is jetted from the air jetting portions 50, 51.

Through this process, the endless sanding belt 4
Polishing debris adhering to the surface of the polishing member 6 is pushed out by pressurized air and collected together with the air into the collection ducts 52 and 53.

Only one of the air injection parts 50 and 51 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 pressurized air is made to flow from the inside to the outside of the endless sanding belt, polishing debris adhering to the surface of the sanding belt can be removed well, and therefore, the grinding and polishing by the sanding belt can be carried out as much as possible. It can be applied precisely and the life of the belt can be extended. In addition, the pressurized air that has passed through the belt and the abrasive debris that has been removed by the pressurized air are collected by a collection duct that is installed opposite the belt surface, so no dust is scattered around, achieving a clean working environment. It has excellent effects such as:

[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 belt sander using a tread pad, respectively, and Figures 3 and 2 are schematic side views of the first and second embodiments of the present invention, respectively. FIG. 4 is a schematic side view of a third and fourth embodiment in which the present invention is applied to a vertical grinding type belt sander using a grinding roll, respectively. 5 and 6 show a fifth embodiment in which the present invention is applied to a horizontal grinding type belt sander machine, FIG. 5 is a schematic longitudinal sectional side view, and FIG. 6 is a partially cutaway lateral plan view. 1, 40... Material feeding device, 5, 33, 47... Grinding and polishing device, 10, 32, 46... Endless sanding belt, 12, 20, 21, 34, 50, 5
1... Air injection part, 13, 23, 24, 35,
52, 53...Recovery duct, 48...Press cylinder.

Claims (1)

[Scope of Claims] 1. 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, wherein the endless sanding belt is The endless sanding belt is formed of a breathable nonwoven fabric belt, and an air injection section consisting of a plurality of air nozzles arranged along the inner surface of the belt is disposed inside the linear running section of the endless sanding belt, and the injection section A collection duct is disposed on the outside of the sanding belt opposite to the sanding belt, and pressurized air injected from the air nozzle is circulated from the inside of the belt to the outside to remove abrasive debris on the belt surface. Belt cleaning device for dry belt sander.