JP5056527B2 - Powder rolling equipment - Google Patents

Description

  The present invention relates to a powder rolling apparatus for producing a sheet material by rolling a powder between rolling rolls.

Conventionally, for example, the powder rolling apparatuses described in Patent Document 1 and Patent Document 2 are known as powder rolling apparatuses that can obtain a thin sheet material without fluctuation in thickness.
The powder rolling apparatus has a preliminary reduction roll that preliminarily reduces the powder between one of a pair of rolling rolls, thereby rolling the powder to a thickness thinner than the thickness corresponding to the biting angle of the rolling roll. Therefore, a sheet material thinner than the conventional one can be manufactured stably.
JP 2002-212608 A JP 2005-139536 A

  However, in the powder rolling apparatus, a part of the preliminarily reduced powder may adhere (stick) to the preliminary reduction roll during the preliminary reduction, and the preliminary reduced powder remains attached to the preliminary reduction roll. When pre-rolling with the rolling roll again, the density and thickness are partially increased at the adhering part, and a sheet material with non-uniform density and thickness is produced, which affects the quality and yield of the product. There was a problem.

  This invention is made | formed in view of the said problem, and it aims at providing the powder rolling apparatus which can manufacture the sheet | seat material with a uniform density and thickness stably.

In order to solve the above-mentioned problems, the present invention is a powder rolling device comprising a rolling roll for rolling powder and a pre-rolling roll for pre-rolling the powder between the rolling rolls, wherein the pre-rolling Therefore, a configuration is adopted in which a removal device for removing the powder adhering to the pre-rolled roll is provided.
By adopting such a configuration, in the present invention, by removing the powder adhering to the pre-rolling roll, the powder adhering to the pre-rolling roll is prevented from being pre-rolled again with the rolling roll. be able to.

Moreover, in this invention, the said removal apparatus employ | adopts the structure of removing the said removed powder to the supply side which supplies the said powder between the said rolling roll and the said pre-rolling roll.
By adopting such a configuration, in the present invention, by removing the removed powder to the supply side, the removed powder can be reused as a sheet material forming powder without being discarded.

Moreover, in this invention, the said removal apparatus employ | adopts the structure of having a brush roll which removes and removes the said powder adhering to the said pre-rolling roll.
By employ | adopting such a structure, in this invention, the powder adhering to a pre-rolling roll with a brush roll can be efficiently removed and removed.

According to the present invention, there is provided a powder rolling apparatus comprising a rolling roll for rolling powder and a preliminary reduction roll for preliminarily reducing the powder between the rolling roll, and adheres to the preliminary reduction roll by the preliminary reduction. By adopting a configuration having a removal device for removing the above-mentioned powder, the powder adhering to the pre-rolling roll is removed, and the powder adhering to the pre-rolling roll is again pre-rolled with the rolling roll. Can be prevented.
Therefore, according to the present invention, it is possible to stably manufacture a sheet material having a uniform density and thickness.

Hereinafter, an embodiment of a powder rolling apparatus and a powder rolling method of the present invention will be described with reference to FIG.
FIG. 1 is a schematic configuration diagram of a powder rolling apparatus 1 in the present embodiment.
The powder rolling apparatus 1 includes a pair of rolling rolls 4A and 4B arranged in parallel and horizontally, and a hopper 3A that is disposed above one rolling roll 4A and supplies metal powder (powder) 2 via a belt feeder 5A. A pre-rolling roll 7A for pre-pressing the metal powder 2 between the rolling roll 4A and a removing device 10 for removing the metal powder 2 adhering to the pre-rolling roll 7A during the pre-rolling. A sheet guide (not shown) for guiding the rolled and formed sheet material to the next process is disposed below the rolling rolls 4A and 4B.

  The rolling rolls 4A and 4B are controlled so as to be independently rotatable and synchronously rotated at the same speed. In some cases, the sheet material is controlled to rotate at different constant speeds in order to apply a shearing force to the sheet material. Further, the gap between the rolling rolls 4A and 4B is adjustable, and the thickness of the rolled sheet material can be arbitrarily changed.

  The hopper 3A has a hollow structure that gradually decreases in diameter as the cross-sectional shape goes downward, stores the metal powder 2, and passes the metal powder toward the peripheral surface of the rolling roll 4A via a belt feeder 5A connected to the bottom. 2 is supplied.

  The belt feeder 5A is provided at the bottom of the hopper 3A, and is configured to convey the metal powder 2 from the hopper 3A by being connected to a rotation driving mechanism (not shown) and driven to rotate. Further, the belt feeder 5A is configured such that the conveyance destination is located above the rolling roll 4A and the metal powder 2 is supplied onto the peripheral surface of the rolling roll 4A. Furthermore, the belt feeder 5A has substantially the same width as the width of the rolling roll 4A, and can supply the metal powder 2 uniformly over the width direction of the rolling roll 4A.

  The pre-rolling roll 7A is formed to have a diameter smaller than that of the rolling roll 4A (and 4B), specifically, 20% or less of the diameter of the rolling rolls 4A and 4B, and the rotation center thereof is the rotation of the rolling roll 4A. It is installed in the position of angle (theta) 1 from the perpendicular direction upper direction to the rolling roll 4B side with respect to the center. The installation angle θ1 can be selected from 0 ° to 85 °, but here, θ1 = 30 °. Moreover, the unevenness | corrugation is formed in the outer peripheral surface of the pre-rolling roll 7A, and it is easy to bite the supplied metal powder 2. The unevenness may be uniform or non-uniform. Further, depending on the properties of the metal powder 2, a flat roll having a smooth outer peripheral surface may be used. Further, instead of a flat roll, a roll having a concave crown or a convex crown may be used.

  The pre-rolling roll 7A is provided with a rotation mechanism (not shown), and can be adjusted independently to an arbitrary rotation speed (circumferential speed) with respect to the rolling rolls 4A and 4B. The axial distance between the pre-rolling roll 7A and the rolling roll 4A can be arbitrarily adjusted, and therefore the gap between these rolls can be finely adjusted.

  The removing device 10 is configured to include a brush roll 11 that removes and removes the metal powder 2 attached to the pre-rolling roll 7A, and a rotation mechanism (not shown) that drives the brush roll 11 to rotate.

The brush roll 11 has a configuration in which animal fibers, plant chemical fibers, metal wires, and the like are planted on the peripheral surface of the roll, and the brush provided on the peripheral surface is in contact with the peripheral surface of the pre-rolling roll 7A. Installed. Specifically, in the present embodiment, the brush roll 11 is installed so as to come into contact with the peripheral surface on the side where the hopper 3A and the belt feeder 5A are provided from a vertical line passing through the rotation center of the preliminary reduction roll 7A.
The brush roll 11 has a width substantially the same as the width of the pre-rolling roll 7A, and is connected to a rotation mechanism that rotates the brush roll 11 about a rotation axis extending in the width direction (the direction perpendicular to the paper surface in FIG. 1). It is configured to rotate independently at an arbitrary rotational speed with respect to the pre-rolling roll 7A.
When a metal wire is used for the brush, it is preferable to select a metal wire material having a lower hardness than the member forming the pre-rolling roll 7A in order to avoid wear and scratches on the pre-rolling roll 7A due to contact.

  The rotating mechanism rotates the brush roll 11 so that the circumferential surface of the opposing pre-rolling roll 7A and the circumferential surface of the brush roll 11 move in the same direction, and the metal powder 2 attached to the pre-rolling roll 7A is moved. The supply side for supplying the metal powder 2 between the rolling roll 4A and the preliminary reduction roll 7A, in other words, the upstream side before the metal powder 2 is supplied between the rolling roll 4A and the preliminary reduction roll 7A. It is configured to drop. Specifically, the rotation mechanism is configured to drive the brush roll 11 to rotate counterclockwise around the rotation axis in FIG. 1 at a peripheral speed larger than the peripheral speed due to the rotational drive of the preliminary reduction roll 7A. It has become.

Next, the operation of the powder rolling apparatus 1 having the above-described configuration will be described with reference to FIGS. 1 and 2 along the procedure for manufacturing the sheet material.
FIG. 2 is an enlarged view of a portion where the brush roll 11 is provided.
First, as shown in FIG. 1, the powder rolling apparatus 1 rolls the metal powder 2 stored in the hopper 3A toward the peripheral surface of the rolling roll 4A via a belt feeder 5A connected to the bottom of the hopper 3A. Supply continuously over the width direction of the roll 4A.
The metal powder 2 supplied on the rolling roll 4A is preliminarily rolled between the pre-rolling roll 7A and the rolling roll 4A. Here, since the pre-rolling roll 7A has a smaller diameter than the rolling roll 4A and the contact arc length is small, the metal powder 2 to be drawn is reduced, and as a result, compared with the case of rolling between the rolling rolls 4A and 4B. Can be rolled thinly.
The metal powder 2 is deaerated by being preliminarily rolled between the pre-rolling roll 7A and the rolling roll 4A, and the metal powder 2 having a constant density and a constant thickness is quantitatively determined, and the rolling rolls 4A and 4B. Will be supplied in between.

  Here, a part of the metal powder 2 that has undergone preliminary reduction may adhere (stick) to the peripheral surface of the preliminary reduction roll 7A in a state where the relative speed is substantially zero, but has adhered to the preliminary reduction roll 7A. As shown in FIG. 2, the metal powder 2 is removed from the peripheral surface of the preliminary reduction roll 7 </ b> A by the brush roll 11 rotating at a peripheral speed larger than the peripheral speed of the preliminary reduction roll 7 </ b> A.

By rotating the brush roll 11 at a relative peripheral speed larger than that of the pre-rolling roll 7A, the metal powder 2 can be wiped down, and the removed metal powder 2 can be prevented from rolling up.
The removed metal powder 2 is usually wiped down to the supply side for supplying the metal powder 2 between the rolling roll 4A and the pre-rolling roll 7A, and the density before the pre-rolling is low from the high density due to the pre-rolling. It returns to a state and will receive preliminary reduction again between the rolling roll 4A and the preliminary reduction roll 7A.

And the rolling rolls 4A and 4B are inserted between the metal powder 2 supplied between the rolling rolls 4A and 4B and the rolling rolls 4A and 4B from the upper side to the lower side by being rotationally driven at a predetermined distance. The sheet-like metal plate 21 is rolled. By the rolling, the metal powder 2 is fixed to the metal plate 21 to form a sheet material.
The sheet material rolled to a desired thickness between the rolling rolls 4A and 4B is sent to the next process (for example, a sintering process) along the sheet guide. Even if the irregularities formed on the outer peripheral surface of the pre-rolling roll 7A are transferred to the sheet material, the surface shape of the pre-rolling roll 7A is the same as that of the sheet material because it is formed smoothly by rolling with the rolling rolls 4A and 4B. Does not affect surface gloss.

Therefore, according to this embodiment mentioned above, with the powder rolling apparatus 1 provided with rolling roll 4A, 4B which rolls the metal powder 2, and the pre-rolling roll 7A which pre-rolls the metal powder 2 between the rolling rolls 4A. In addition, by adopting a configuration in which the removal device 10 for removing the metal powder 2 attached to the pre-rolling roll 7A by the pre-pressing is employed, the metal powder 2 attached to the pre-rolling roll 7A is removed, thereby It is possible to prevent the metal powder 2 adhering to the reduction roll 7A from being preliminarily reduced with the rolling roll 4A again.
Therefore, according to this embodiment, there is an effect that a sheet material having a uniform density and thickness can be manufactured stably.

  Moreover, in this embodiment, the removal apparatus 10 employ | adopts the structure of scraping off the said removed metal powder 2 to the supply side which supplies the metal powder 2 between the rolling roll 4A and the pre-rolling roll 7A. The removed metal powder 2 can be reused as the metal powder 2 for forming the sheet material without being discarded.

Moreover, in this embodiment, the removal apparatus 10 employ | adopts the structure of having the brush roll 11 which removes and removes the metal powder 2 adhering to 7 A of preliminary reduction rolls.
By employ | adopting such a structure, in this invention, the metal powder 2 adhering to the pre-rolling roll 7A with the brush roll 11 can be efficiently removed and removed.

  As mentioned above, although preferred embodiment of this invention was described referring drawings, this invention is not limited to the said embodiment. Various shapes, combinations, and the like of the constituent members shown in the above-described embodiments are examples, and various modifications can be made based on design requirements and the like without departing from the gist of the present invention.

  For example, in the said embodiment, although the removal apparatus 10 which removes the metal powder 2 adhering to 7 A of preliminary reduction rolls demonstrated that it was the structure which has the brush roll 11, this invention is not limited to the said structure. Alternatively, for example, a configuration having a member such as a fixed brush or felt that abuts the circumferential surface of the pre-rolling roll 7A in the width direction may be used. Moreover, the structure which provides the apparatus which removes the metal powder 2 adhering by gas ejection or suction may be sufficient. Furthermore, an apparatus configuration in which the removed metal powder 2 is once sucked and then removed to the supply side may be used.

  Further, for example, in the above-described embodiment, the brush roll 11 has been described as rotating at a relative peripheral speed greater than that of the preliminary reduction roll 7A. However, the present invention is not limited to the configuration that performs the operation. For example, the preliminary reduction roll 7A It may be configured to rotate at a smaller relative peripheral speed, or to rotate so that the peripheral surface of the opposing pre-rolling roll 7A and the peripheral surface of the brush roll 11 move in opposite directions.

  Moreover, in the said embodiment, although the powder rolling apparatus 1 demonstrated rolling the metal powder 2 to the single side | surface of the metal plate 21, and forming a sheet | seat material, the hopper 3A, the belt feeder 5A, and preliminary reduction also on the rolling roll 4B side. If the roll 7A and the removing device 10 are provided symmetrically with the rolling roll 4A side, the metal powder 2 can be rolled over the entire surface of both surfaces of the metal plate 21, and a three-layer sheet material can be formed. is there.

  In the above embodiment, the powder rolling device 1 has been described as rolling the metal powder 2 and the metal plate 21 with the rolling rolls 4A and 4B. However, the metal plate 21 is not essential for forming the sheet material, and the metal plate 21 is used. The structure which does not use may be sufficient.

It is a schematic block diagram of the powder rolling apparatus in embodiment of this invention. It is an enlarged view of the part in which the brush roll of the powder rolling apparatus in embodiment of this invention is provided.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Powder rolling apparatus, 2 ... Metal powder (powder), 4A, 4B ... Roll, 7A ... Pre-rolling roll, 10 ... Removal apparatus, 11 ... Brush roll

Claims (3)

A powder rolling device comprising a rolling roll for rolling powder, and a pre-rolling roll for pre-rolling the powder between the rolling rolls,
A powder rolling apparatus comprising a removing device for removing the powder adhering to the pre-rolling roll by the pre-rolling.   2. The powder rolling apparatus according to claim 1, wherein the removing device wipes off the removed powder to a supply side that supplies the powder between the rolling roll and the preliminary reduction roll. 3. The powder rolling apparatus according to claim 1, wherein the removing device has a brush roll that removes the powder adhering to the pre-rolling roll by removing the powder.

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