JPH06501196A - Surface polishing of small objects - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] Surface polishing of small objects Enlarge the area and use the device to clean inorganic or metal aggregates and objects. It is desirable to improve the efficiency of the new wall by providing a movable bottom surface that passes under the new wall. Stage, inlet of the object to be processed, feeding the object into the chamber from the inlet, i.e. through the inlet and an outlet for the treated object. These are for use The material is recirculated within the chamber, and the material removed therefrom is deposited on the transverse wall. It is configured to pass below. The chamber has a top opposite the bottom. It is characterized by the presence of an auger that generates pressure. enclosed in the top The recirculating auger applies pressure to the recirculating material, forcing the lowest object to the bottom. Ru.

In certain embodiments of the invention, the means for supplying particles is an auger or the like. Ru. Sufficient pressure can be achieved by using an auger, and such pressure Occurs over a wider area within the chamber. In this way, the efficiency of the device is improved.

Such equipment may include means for restricting the flow of the treated material from the outlet. preferable.

In such cases, the pressure generated is dependent on the influence of the auger (e.g. rotational speed). degree) and the degree of restriction at exit.

The present invention also relates to a method of abrading small objects to remove surface material therefrom.

The method of the invention comprises a chamber having a movable abrasive bottom passing under one of its transverse walls. to recirculate the material within the chamber and remove the material removed from the material. a step of passing the object under the transverse wall, and an exit of the chamber, It consists of a process of removing from. The method of the invention operates an auger to recirculate Characterized by applying pressure to an object, forcing the lowest object to the bottom .

Means of providing a movable abrasive bottom, covered with an endless abrasive belt or abrasive material or coated drums, etc.

for removing material stripped from the object from said means for providing an abrasive movable bottom; Preferably, means are also provided for drawing negative pressure outside the chamber.

An embodiment of the invention will now be described, by way of example only, with reference to the accompanying drawings, in which: FIG.

1 is a sectional view of the device of the present invention, FIG. 2 is a diagram showing details of the device shown in FIG. 1, and FIG. and FIG. 3 are cross-sectional views taken along line A--A in FIG.

The chamber 2 is defined by a box 4 with side walls 6.8 and a cross section 9!10.12 . Drum +4 covered by abrasive sheet 16 (only a portion of which is shown) ) constitutes the polishing movable bottom or floor of the chamber. In use, The drum 14 rotates in FIG. 3 about an axis (not shown) perpendicular to the plane of the paper. C The upper or outer surface of the plate 16 is coated with abrasive sand or grid. . The drum 14 is installed below the transverse walls 1G, 12 and the side walls 6.8 with a gap 18. is passing. The gap 18 between the transverse walls 1G and 12 and the drum 14 is IQ/ It is on the order of 1 [100 inches (approximately 0.254 mm). other walls and drums The gap between 14 and 14 is not very important, but it is preferable that they be of the same order. Delicious.

The box 4 has a semi-cylindrical top 20 which closes the chamber 2.

Inlet 22 extends from a hopper (not shown) into chamber 2 adjacent side wall 6 .

An outlet in opposing side walls 24 spaced laterally across the drum 14. 24 are provided. In a preferred configuration, the outlet 24 is located in the side wall 8. It extends from the transverse wall 10 to the transverse wall 12, and is thus adjacent to the transverse wall 12. There is. In other configurations, the outlet 24 may not extend completely between the side walls. good, but preferably close to the wall 12 towards which the drum rotates. .

Partially below the inlet 22 and towards the interior of the chamber 2, an auger 26 is arranged. It is placed. In use, the auger 26 rotates to remove small objects to be processed. is supplied into the chamber 2 through the inlet 22. In other configurations, the auger 26 , may be located only within the inlet 22. In that case, the auger 26 is fed into the chamber 2 through the inlet 22. The size of the outlet 24 is determined by the size of the chamber. reduced compared to the cross-section, restricting the flow of matter exiting the chamber . Significant pressure is thus created within the chamber. This pressure is at the top of the chamber Contained by 20. This pressure forces the object into a sheet on the rotating drum 14. 16 towards the polishing surface. The pressure generated is due to the action of the auger 26 (and e.g. how fast it is rotating) and said limitations by the exit. Ru. The generated pressure flows from the inlet to the outlet and from the transverse wall 10 to the transverse wall 12. over the entire surface of the drum, with the bottom object facing the drum 14 at a substantially right angle. It can be energized.

The small objects to be processed are filled into the hopper and fed to the inlet 22. As an example , the small object is a rice grain whose outer layer (part or all of the bran layer) has been removed from its surface. It may be. In this example, the drum 14 has a surface velocity of approximately 10 m/sec. It is driven as if Rice is fed into the chamber 2 via the inlet 22. The rice is is carried across the chamber by an auger 26 and generates pressure as described above. . Due to the action of the drum, the rice grains are recirculated in the direction indicated by the arrow in Figure 3. thus , they come into repeated contact with the drum 14. The outer layer is then removed.

As shown, auger 26 only partially traverses box 4. However, the shaft 42 of the auger 26 completely traverses the box 4 and is located on the side wall 8. It extends into the bearing. Any paddle 44 is approximately a radius from shaft 42 It extends in the direction and rotates together with the shaft 42. In this way, the rice grain chamber Ensure rotation within.

Referring to FIG. 3, the removed material passes through the gap 18 below the wall 12 and the rice grains It exits the chamber 2 through an outlet 24 at the end of the drum. In this way, the exclusion The removed material and the rice grains are collected separately by means not shown. illustrated In the example shown, the baffle (bath 1e) 28 is connected to the transverse wall 1 [1, 12] A plenum chamber 30 is formed. Partial vacuum (parltal vxc) uam) is introduced into the plenum chamber 30 via an outlet (not shown) and the gap Air is drawn into the plenum chamber 30 from 18 . In this way, drum 14? Remove substances from A similar wall 28 defines a plenum chamber in the vicinity of another transverse wall IQ. The device of the present invention can operate no matter which direction the drum 14 rotates. can.

In a variant (not shown), two chambers 2 are provided across the drum. They are placed back to back.

The inlets of the two chambers 2 are adjacent or common. Also, the chamber The two outlets are located at opposite ends of the drum. Left and right augers have the same shaft rotate to move the small objects in opposite directions toward their respective exits.

Gap 18 is sufficiently small that only the removed material can pass through it.

In this type of polishing of rice grains, all the “fine powder” caused by the destruction is lost along with the rice. It stays there and does not move into the water. In this way, surface substances are removed and small objects separated from the body. In practice, it is preferred that the gap 18 be as small as possible; For example, it is 1G/ION inch. The standard gap 18 is 30/IHG inches. not exceed.

The rice grains are recirculated so they are well polished without being destroyed or heated. be done.

At the transverse wall 12, the small object stops its forward movement and moves upward. stop and recirculate in the direction of the arrow shown in FIG. The top 20 is restricted to an auger 26. The bottom object is transferred to the drum 14 by sealing the pressure generated between the Press. The illustrated lid is shaped like a vine to house the auger; It may be highly rigid or flexible. Also, even if it is flat , other shapes are also possible. The flexible lid applies pressure on the outside towards the chamber. It acts as a diaphragm.

A blockage means is provided to enable controllable or adjustable restriction of the flow of rice from the outlet 24. A flap 32 is provided. The flap is attached to the plate 36 by a pin 34. is rotatably mounted, thereby blocking the outlet 2G as shown in Figure 1. or open the outlet (not shown). The flap 32 has a pin 38a and operated by a rod 38 rotatably mounted by a block 40. be done. The flaps can be operated, for example, by pneumatic pressure (not shown) or from a weight and lever. (not shown) into the closed position.

The force exerted on the flaps 36,38 is the amount of work applied to the small object and therefore the amount of work removed. This affects the amount of substances that can be absorbed.

As the force applied to the flap increases, the amount of material removed increases. for this purpose For this reason, it is preferable that the air pressure be adjustable in the same way as the weight.

In other variations (not shown), the restriction of grain flow from outlet 24 is may be provided by a port or tube, at the lower end of which said outlet is connected; The kernels are collected from the upper end. The height of the chute or tube is adjustable and Partially determine the limit.

Although not shown, there are other examples where the drum is directly coated with abrasive material. . The drum is replaced by an endless abrasive belt stretched between two rollers. It's okay. The advantage of using a drum is the opposite of an endless belt: That is, the belt has a backing plate that stays in the same place. whereas the drum requires and is heated by the abrasive action of the belt on small objects. The entire drum rotates, and each part of the drum cools between passes through the lower part of the chamber. be done.

Claims (18)

[Claims] 1. chamber (2), passing under the transverse walls (10, 12) of said chamber (2); means (14) for providing a movable bottom (16) for polishing, for small objects to be polished; an inlet (22), means for feeding small objects from the inlet into the chamber, and a polished small object; It consists of a combination of outlets (24) for objects, which, in use, allow the inside of said chamber (2) to be The circulating small objects and the substances removed from the small objects are transferred to said transverse walls (10, 12). passing through said chamber having a top (20) opposite said bottom (16) on the underside of said chamber; Apparatus used for polishing small objects to remove surface material, configured to generating a pressure in the chamber (2) covered by said top (20); Auger means (26) transport the lowest of the small objects in circulation to said bottom (16). A device characterized by pressing. 2. characterized in that a part of said auger means is arranged at said inlet (22). 2. The apparatus of claim 1. 3. configured to rotate by a common shaft and feed separate outlets (26). 3. The auger means (26) according to claim 1 or 2, characterized in that said auger means (26) are present. equipment. 4. A shaft (42) having a paddle (44) extends from said auger (26) to said 4. A device according to claim 1, 2 or 3, characterized in that it extends in the exit direction. 5. The top (20) has flexibility to receive pressure from outside the chamber (2). 5. A device according to claim 1, 2, 3 or 4, which is a diaphragm. 6. An endless polishing belt (16) is provided on the polishing movable bottom (16). 6. A device according to claim 1, 2, 3, 4 or 5, characterized in that: 7. The polishing movable bottom (16) has a polishing coating or coating. Claim 1, 2, 3, 4 or 5, characterized in that a ram (14) is provided. The device described. 8. characterized in that said outlet (24) is adjacent to said transverse wall (10, 12). 8. The apparatus according to claim 1, 2, 3, 4, 5, 6 or 7. 9. It has two outlets (24), one on each side of the inlet (22). The device according to claim 1, 2, 3, 4, 5, 6, 7 or 8, characterized in that: 10. Particularly by means (32) for restricting the flow of small abrasive objects from said outlet. 10. A device according to claim 1, 2, 3, 4, 5, 6, 7, 8 or 9. 11. A chute or Claim 1, 2, 3, 4, 5, 6, 7, 8, 9 or 9, characterized in that it is made of a tube. 10. The device according to 10. 12. The height of the chute or tube can be adjusted to adjust the degree to which the flow is restricted. 12. A device according to claim 11, characterized in that the height is adjustable. 13. Said flow restricting means (32) close off the outflow of small abrasive objects. 11. The closure means (32) according to claim 10, characterized in that the closure means (32) are biased to Device. 14. 14. The salt apparatus of claim 13, wherein said biasing is adjustable. 15. said small object by means (18) of providing said movable bottom (16) for polishing; drawing a vacuum (30) on the outside of said chamber to remove abrasive material from the chamber; Claims 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 characterized by the means , 11, 12, 13 or 14. 16. A small part of the chamber with a movable bottom for polishing moves under the transverse wall of the chamber. supplying an object such that the small object crosses a transverse wall of the chamber; Material circulated within and removed from the small object is passed through the transverse wall and is polished. A small object for removing substances, which is obtained by removing a small object from the outlet into the chamber. A method of polishing a body, wherein a small object in circulation is used to press a small object at the bottom to said bottom. Object characterized by operating an auger (26) to pressurize the object A method of polishing small objects to remove dirt. 17. characterized by restricting the flow of small objects from said outlet (24). 17. The method according to claim 16. 18. removed from said small object by means (18) of providing a movable bottom for polishing. A vacuum (30) may be drawn outside said chamber (2) to remove material. 18. The method of claim 17, characterized in that: