KR20210054290A - Efficient Potter with Grinding Device - Google Patents

Abstract

The present invention provides a grinding device having a configuration capable of suppressing increases in processing and operating costs to increase rice-polishing efficiency. As the grinding device (3) for grinding and polishing introduced grains while conveying, a plurality of convex members (4) are detachably provided on an outer peripheral surface of a cylindrical roll, and the convex members (4) are configured to fix very hard and fine particles (D) to a surface of the member formed in a convex shape by machine processing in advance through metal plating (4B), and is mounted along circumferential and axial directions on the surface of the cylindrical roll.

Description

Efficient Potter with Grinding Device

The present invention relates to a polishing machine using a grinding device, and more particularly, to a configuration of a polishing roll used for peeling grains.

One of the milling machines used for milling of rice or barley, etc., has a configuration using a grinding method.

Grinding rolls for polishing are installed in the polishing machine using the grinding method, and in the configuration of the grinding roll, a number of convex grinding blades are formed by machining on the outer circumferential surface of a rotatable metal body, or fine particles such as emery are used. There is a structure that is sintered and turned into a rotating body.

However, when machining a metal body, processing costs are high, and when fine particles are sintered, there are problems such as difficulty in obtaining a homogenized product in accuracy.

In order to solve the above problems, for example, as disclosed in Japanese Unexamined Patent Publication No. 9(1997)-173876, fine particles are deposited on the surface of a roll made of metal through a metal plating layer. There is a formed composition.

In the above configuration, fine particles of a material having high hardness, such as diamond, sapphire, and further, a zirconia-based ceramic, are adhered to the roll surface in a scattered state through a metal plating layer, so that the roll and the fine particles are integrated.

In the above publication, one screw-like member is formed on the circumferential surface so that the polished rice or the like can move in the axial direction according to the rotation of the roll or the like. According to the above publication, it is possible to move the grain in the axial direction according to the shape of the circumferential surface by this configuration, and at the same time, the interior of the polishing machine by the action of a resistance plate that can change the pressure acting on the grain at the downstream side in the moving direction. It is disclosed that the pressure can be increased to some extent to increase the contact pressure between the grain and the grinding wheel.

However, when the pressure of the resistance plate is increased in order to increase the grinding efficiency of the grain by increasing the internal pressure, the grain is not in a dense state, but the grain is filled in the entire grain, so that it becomes a so-called block type. Confirmed by experiment.

Therefore, when the grain is full and becomes a block shape, the motion of the grain is restricted, and the grain cannot rotate or reverse, resulting in a defect in that the whole grain is not uniformly ground. That is, the grains rotate and reverse, so that the so-called direction cannot be reversed, so that the same part (surface) always comes into contact with the grinding surface of the polishing roll.

In the case of grain grinding, for example, in the case of rice, the flat portion of the side surface is ground more flatly, and this point inhibits the rotation of the grain and is gradually promoted to a flat state.

On the other hand, if the pressure of the resistance plate is reduced and the rotation speed of the polishing roll is changed to prevent the promotion of the flat state, rotation in one direction occurs about the long axis of the grain. Therefore, the grain is ground into a cylindrical shape, and in the extreme case, it is ground into a needle shape. In order to evenly grind the entire grain in consideration of the occurrence of the above phenomenon, it is necessary to further lower the pressing force of the resistance plate to lower the grain density to the extent that the grain contacting the polishing roll can be reversed. It will lower the polishing efficiency of the. As described above, it is possible to increase the grinding efficiency of grains to some extent by preventing the grains from becoming convex due to the fact that it has a peel transfer capability with a graining roll using a single screw-like projection, but it is not possible to achieve sufficient grain graining efficiency. There was a problem.

On the other hand, the above publication discloses that the shape of the grain can be reduced due to the uniform grain direction by the configuration of the polishing roll. However, as described above, when the pressing force of the resistance plate is increased, the grain density in the polishing chamber increases, and the grain cannot move freely. Therefore, the grains of the threaded grooves connected as one are conveyed toward the outlet while staying in the grooves as they are, and during that time, the surface is thickly ground.

In contrast, particles on the side of the polishing net in the polishing chamber are moved toward the exit by the shell conveying force by the shell conveying screw without moving toward the polishing roll. In the extreme case, the surface is discharged without grinding at all. Therefore, there is a fear that excessively ground particles and particles that are not ground at all are mixed and discharged.

In the case of using the polishing roll disclosed in the above publication, it is difficult for machining to integrally form a large-sized one, and it is difficult to repair when there is abrasion or defect of the grinding surface, so that a new one is replaced. However, there is a concern that processing costs and operating costs may increase. Further, by using a single screw structure, as described above, it is not possible to equally obtain polishing opportunities in all grains, and it becomes difficult to improve the polishing efficiency.

As is also apparent from the above embodiments, according to the invention according to claim 1, it is possible to constitute a convex portion having a surface on which very hard and fine particles are distributed simply by attaching the convex member to the surface of the cylindrical roll. Thereby, even when a member requiring machining is used, it is possible to achieve relatively simple processing and to achieve cost reduction.

According to the invention according to claim 2, when grains come into contact with each convex member during rotation of the polishing roll, it moves in the axial direction and does not stay at the same location. Thereby, it is possible to increase grinding opportunities by eliminating the block state that occurs when grain stays in one place, thereby increasing the grinding efficiency.

According to the invention according to claim 3, since each convex member can be reversed based on its longitudinal center, when the end of the first contact with the grain by the rotational direction of the polishing roll is worn or damaged, the grain The end of the side that is not in contact with the first can be replaced with the end of the side that first comes into contact with the grain. Thereby, the replacement period of the convex member can be extended and the so-called life can be doubled.

According to the invention according to claim 4, unlike a single screw, grains can alternately oppose the convex portion and the concave portion when the polishing roll is rotating, making it possible to easily rotate and reverse the grain. Accordingly, the entire surface of the grain can be ground, and uniform and even grinding can be performed, and thus, it is possible to increase the grinding efficiency of the grain.

In addition, since the convex portion and the concave portion appear alternately, grains existing in the concave portion can move in various directions by the action of the convex portion multiple times within one rotation of the polishing roll. It can be moved to the milling roll, so uniform and even milling is possible throughout the introduced grain.

According to the invention according to claim 5, since the volume of the polishing space formed between the polishing net member is alternately changed in the axial direction when the polishing roll is rotated, grains moving in the polishing chamber space can repeat the dense state. I can. As a result, the grain direction is easily changed according to the change in a dense state, and grains located on the net member side and the polishing roll side are alternately replaced, so that the entire surface can be uniformly and evenly ground for all grains. It becomes possible to increase the polishing efficiency.

1 is a view for explaining the overall configuration of a polishing machine to which a grinding device according to an embodiment of the present invention is applied.
Fig. 2 is a front view showing the configuration of a polishing roll constituting a main part of the grinding device shown in Fig. 1;
Fig. 3 is a side view of the polishing roll shown in Fig. 2;
Fig. 4 is a plan view showing the configuration of a convex member used in the polishing roll shown in Fig. 2;
Fig. 5 is a side view of a convex member used in the polishing roll shown in Fig. 2;
Fig. 6 is a view showing the configuration of the convex member shown in Fig. 4, (A) is an external view, (B) is a partial cross-sectional view, and (C) is a partially enlarged cross-sectional view.

A first object of the present invention is to provide a polishing machine using a grinding device having a configuration capable of suppressing an increase in processing and operation costs in view of the problems in the conventional grinding device.

The second object of the present invention is to provide equal opportunity for grinding in all grains, in other words, to enable free movement of grains to facilitate rotation and reversal, while allowing all grains to come into contact with the grinding rolls. It is to provide a polishing machine using a grinding device having a configuration capable of improving the grinding efficiency of grains by enabling uniform and even grinding.

In order to achieve the above object, the invention of claim 1 is a grinding device for grinding and grinding while conveying the introduced grain. A plurality of convex members are detachably installed on the outer circumferential surface of a cylindrical roll, and the convex members are pre-machined. It is characterized in that very hard and fine particles are fixed and fixed on the surface of the member formed in a convex shape through metal plating, and are mounted along the circumferential and axial directions on the surface of the cylindrical roll.

In the present invention, it is possible to configure a convex portion having a surface on which very hard and fine particles are distributed simply by mounting the convex member on the surface of the cylindrical roll.

The invention according to claim 2 is characterized in that, in the grinding apparatus according to claim 1, the convex member is arranged in a form capable of moving the grain in the axial direction of the polishing roll and installed on the circumferential surface of the polishing roll. I'm doing it.

In the present invention, since the convex members are arranged and installed in a form capable of moving grains in the axial direction, when grains come into contact with each convex member during rotation of the polishing roll, the convex members are moved in the axial direction and do not stay at the same location. Thereby, it is possible to increase grinding opportunities by eliminating the block state that occurs when grain stays in one place.

The invention according to claim 3 is characterized in that the convex member is disposed inclined in the axial direction in the circumferential direction of the polishing roll, and is provided so as to be reversible by 180° based on the center of the longitudinal direction along the inclined direction.

In the present invention, since each convex member can be inverted based on its longitudinal center, if the end of the first contact with the grain is worn or damaged according to the rotational direction of the polishing roll, it is not first contacted with the grain. The end of the non-contact side can be replaced with the end of the first contact. Thereby, the replacement period of the convex member can be extended and the so-called life can be doubled.

The invention described in claim 4 is a state in which the convex portion where the convex member is positioned and the concave portion exposed to the circumferential surface alternately contact the grain in the circumferential surface of the polishing roll when the convex member is positioned and the convex member is not located. It is characterized in that the convex members are arranged at intervals in the circumferential direction and the axial direction.

In the present invention, the convex portion in which the convex member is located and the concave portion in which the circumferential surface of the polishing roll is exposed without the convex member is alternately contacted with the grain when the polishing roll is rotated. Because they are arranged, the convex portion and the concave portion of the grain alternately face each other when the polishing roll is rotating, unlike a single screw. As a result, the grain itself rotates and inverts as the grain touches the irregularities, so that the grain direction, in other words, the direction of the surface to be ground is changed, so that the entire surface of the grain can be ground. In addition, since the volume of the polishing space formed between the polishing net member is different at the position where the convex member and the polishing net member face each other and the circumferential surface of the polishing roll opposite to the polishing net member, the volume of grain changes. By repeating the dense state according to the method, it is easy to exchange the grains located on the milling net side and the grains located on the milling roll side, and the direction can be changed in all directions, and the surface of the grains can be uniformly ground.

The invention according to claim 5 is a polishing machine using the grinding device according to any one of claims 1 to 5, and a plurality of convex members are arranged coaxially with a rotatable conveying member disposed near the introduction part of the grain, and have a plurality of convex members on the outer circumferential surface. A polishing roll made of a cylindrical roll mounted on a main surface; a polishing net member disposed around the outer periphery of the polishing roll to form a space for moving grains between the polishing roll; and the conveying member in the axial direction of the polishing roll It is characterized in that it has a grain discharge portion formed on the opposite side.

In the present invention, since the volume of the polishing space formed between the polishing net member is alternately changed in the axial direction when the polishing roll is rotated, the grains moving in the polishing chamber space can repeat the dense state. As a result, the grain direction is easily changed depending on the change in the dense state, and grains located on the net member side and the polishing roll side are alternately replaced, so that the entire surface can be uniformly and evenly ground for all grains. have.

Next, embodiments of the present invention will be described with reference to the illustrated examples.

FIG. 1 is a view showing the overall configuration of a polishing machine equipped with a grinding device according to an embodiment of the present invention, and the figure shows a case where the upper side in FIG. 1 is installed so as to be the top of the polishing machine 1.

In FIG. 1, the polishing machine 1 includes an outer member 1A made of a cylindrical member, and an introduction port 1B for grains to be polished such as rice is formed in the lower portion of the outer member 1A, and the outer member A discharge port 1C is formed on the side opposite to the inlet port 1B in the vertical direction of (1A).

The inlet port 1B is provided with a conveying member 1D disposed between the grain storage unit connected to the outside and communicated with the grain storage unit, and a discharge tray 1E is provided in the outlet port 1C, respectively.

Inside the outer member 1A, a conveying screw 2 constituting a conveying member disposed near the inlet 1B, and a polishing roll 3 disposed coaxially with the conveying screw 2 are arranged. have.

The polishing roll 3 is a member constituting the main part of the grinding apparatus in this embodiment, and its configuration is shown in the drawings after FIG. 2.

In Fig. 2, the polishing roll 3 is constituted by a cylindrical roll made of metal, and a large number of convex members 4 are arranged on the outer circumferential surface thereof.

As shown in Figs. 4 and 5, the convex member 4 forms a long circle in plan view by machining the metal base material in advance, and corresponds to the radius of curvature of the outer circumferential surface of the polishing roll 3 when viewed from the side. It is a block fragment formed in an arc shape.

The convex member 4 is provided with screw holes 4A at the time of attaching to the polishing roll 3 in a plurality of locations along the longitudinal direction, thereby enabling attachment and detachment from the polishing roll 3.

On the surface of the convex member 4, as shown in Fig. 6, very hard and fine particles D such as diamond are scattered.

The very hard and fine particles (D) are fixed to the surface of the convex member 4 through the metal plating layer 4B formed on the surface of the convex member 4, as shown in Fig. 6(C), and the convex member ( As shown in Fig. 6B, 4) is attached to the surface of the polishing roll 3 through a bolt 5, so that a convex grinding surface can be formed on the surface of the polishing roll 3.

As shown in Fig. 2, although a large number of convex members 4 are arranged on the surface of the polishing roll 3, the arrangement configuration is as follows.

In Fig. 2, the convex member 4 is mounted so that it is inclined in the axial direction from the circumferential direction so as to move the grain in the axial direction when the grinding roll 3 is rotated, and the inclined direction is in the vertical direction. .

In one convex member 4, it can be inverted by 180° with respect to the center in the vertical direction, and in the case of inverting, it is sufficient to release the fastening and support for the screw holes 4A at both ends in the vertical direction. Thereby, when the end corresponding to the upstream side of the rotational direction of the milling roll 3, which is the side where the convex member 4 first contacts the grain, is worn or damaged, the portion where the new end first contacts the grain by simply reversing it by 180°. You can do it.

In the convex member 4 mounted on the surface of the polishing roll 3, as shown in Fig. 2, when the polishing roll 3 is rotated, the convex portion and the convex member at the circumferential surface of the convex member are The convex members are arranged at intervals in the circumferential direction and the axial direction in a state in which the concave portions, which are not located and the circumferential surface is exposed, alternately contact the grain. In Fig. 2, a state in which the convex member indicated by the reference numeral 4 and the convex member indicated by the reference numeral 4'are mounted to be shifted in the axial direction in the circumferential direction is shown, and the longitudinal end of the convex member 4 The circumferential surface of the polishing roll 3 is present at a position adjacent to the circumferential surface of the polishing roll 3, and the circumferential surface of the polishing roll 3 is also present at a position adjacent to the longitudinal end of the convex member 4'. When rotated, the convex portion and the concave portion appear alternately.

In the arrangement of the convex member 4 as described above, the convex portion and the concave portion of the polishing roll 3 can alternately contact the grain with respect to the grain when the grain roll 3 is rotated, whereby the grain direction alternates. It changes every time it touches.

On the other hand, in the interior of the polishing machine 1 in which the polishing roll 3 of the above configuration is disposed, a polishing net member 6 consisting of a cylindrical shape concentric with the polishing roll 3 is disposed around the outer circumference of the polishing roll 3 And a space for movement of grains is formed between the milling rolls 3.

Further, in the vicinity of the discharge port 1C of the polishing machine 1, a pressure applying means 7 capable of advancing and retreating in the axial direction of the polishing roll 3 is provided.

The pressure applying means 7 is a tapered cone-shaped resistance member 7A mounted on the rod of the cylinder 7B, and between the outer circumferential surface of the polishing roll 3 and the polishing net member 6 The grain density is set in various ways by adjusting the pressing force on the grains introduced into the configured milling chamber.

Since the present embodiment has the configuration as described above, the polishing roll 3 to which the convex members 4 and 4'are mounted in advance is disposed inside the polishing machine 1.

The polishing roll 3 may have a simple cylindrical shape, and since the convex members 4 and 4'are also pre-machined block pieces, the workability is comparatively compared to the case where the entire polishing roll 3 is integrally formed. It is good and becomes easy to obtain.

In the polishing machine 1, the grain introduced from the introduction port 1B is conveyed toward the polishing roll 3 side by the conveying screw 2.

Since the polishing roll 3 is provided with convex members 4 and 4'which are arranged and mounted in a divided state in the circumferential direction, unlike a single screw, a portion having a convex portion in the circumferential direction when rotating (convex portion) You can face the grain without the fruit (concave part). Therefore, even when the concave pressure by the pressure imparting means 7 is increased to increase the grain density, the dense state of the grain can be set in the convex portion and the concave portion, and a rough condition occurs in the concave portion, and the convex portion is precise. ) One condition occurs. Accordingly, by creating a dense state of the grain, a state in which the grain is easily rotated and reversed is obtained, and grinding without unevenness on the surface of the grain can be performed.

In addition, since the convex members 4 and 4'are installed so that the convex portions and the concave portions alternately contact the grains when the polishing roll 3 is rotated, the grains concentrated and sent to the concave portions are then In the convex part, it can be forcibly reversed and moved. As a result, some grains have the top part touching the convex part, other grains have the stomach part, and other grains the tail part touched each convex part, and while rotating, they were gathered so that they were extruded toward the polishing net member 6 and moved under force in many directions. And, a so-called scrambled state arises for the grain. As a result, as the grain moves toward the discharge port 1C, the posture can be changed in various directions, so that the entire surface is uniformly ground.

Since the convex portion and the concave portion appear alternately on the circumferential surface of the polishing roll 3, the grain conveyed from the concave portion is also in various directions when the polishing roll 3 faces the convex portion multiple times during one rotation. Since it can be moved to, the grain located on the side of the net member 6 and the grain located on the side of the polishing roll 3 in the polishing chamber between the polishing net member 6 can be replaced. Thereby, as a whole, all of the grains can be brought into contact with the polishing roll 3, and uniform and even grinding is performed.

When a part of the convex members 4, 4'of the polishing roll 3 is worn or damaged, by inverting the convex member 4, 4'by 180° with respect to the longitudinal center of the convex member 4, 4', the new longitudinal end is It can be positioned upstream in the rotational direction of the polishing roll 3 so that it first contacts the grain. Thereby, while being a single convex member, the service life can be doubled, and maintenance at the time of replacement can be performed without requiring any special replacement work.

According to the present embodiment, since the polishing roll 3 having a grinding surface is produced only by attaching the convex members 4, 4'made of block pieces to the circumferential surface of the polishing roll 3, the convex member 4, Since it is also possible to adjust the number of 4'), it becomes possible to set the state according to the degree of grinding, such as the fineness. Further, in the above embodiment, an example in which the polishing machine 1 is installed in an upright state is shown, but it is of course possible to install it horizontally.

1: polishing machine, 1A: outer body, 2: conveying screw, 3: polishing roll forming the main part of the grinding device, 4: one side of the paired convex member, 4': the other side of the paired convex member, 5: bolts , 6: cylindrical mesh member, 7: pressure imparting means.

Claims (5)

As a grinding device that grinds and grinds while conveying the introduced grain,
A plurality of convex members are detachably installed on the outer circumferential surface of an adjustment roll made of a cylindrical roll,
The convex member is configured by fixing very hard and fine particles through metal plating on the surface of the member formed in a convex shape by machining in advance, and is mounted along the circumferential and axial directions on the cylindrical roll surface. Grinding device. The method of claim 1,
The convex member is arranged in a form capable of moving the grain in the axial direction of the polishing roll, and is installed on the circumferential surface of the polishing roll. The method of claim 1,
The convex member is disposed so as to be inclined in the axial direction in the circumferential direction of the polishing roll, and is installed so as to be reversible at 180°C based on the center of the longitudinal direction along the inclined direction. The method of claim 1,
When the polishing roll is rotated, the convex member is in the circumferential direction in a state in which the convex portion where the convex member is located and the concave portion where the circumferential surface is exposed alternately contact the grain in the circumferential surface thereof. And a grinding device arranged at intervals in the axial direction. The method according to any one of claims 1 to 5,
A grinding roll comprising a rotatable conveying member disposed near the introduction portion of the grain and a cylindrical roll disposed coaxially with a plurality of convex members mounted on an outer circumferential surface thereof;
A polishing net member disposed around the outer periphery of the polishing roll and constituting a space for moving grains between the polishing rolls;
A polishing machine comprising a grain discharging part formed on a side opposite to the conveying member in the axial direction of the polishing roll.

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