JP2018094586A - Roll press device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a roll press device molding a sheet having sufficient strength.SOLUTION: A roll press device 1 rolling and molding a powder-shaped or sheet-shaped molding material, has a rolling mechanism 102 which rolls and molds the molding material; a hot roll press mechanism 104 which heats and rolls the molding material; and a pair of metallic belts 2a and 2b which passes through at least one of the rolling mechanism 102 and the hot roll press mechanism 104 while sandwiching the molding material. At least one metallic belt 2a (or 2b) of the pair of metallic belts 2a and 2b has a groove portion 23 in a longitudinal direction (carrying direction Y) of the metallic belts 2a and 2b.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a roll press apparatus for rolling and forming a powdery or sheet-like molding material.

  Roll press apparatuses are widely used in industrial applications, and are used for the purpose of rolling and forming materials such as films, paper, nonwoven fabrics, metal foils, and steel plates. In addition, it is often applied to uses other than molding, such as polishing and pasting of the sheet surface and drawing (dehydration) of fiber materials. A powder rolling method for forming a sheet by continuously supplying metal powder such as stainless steel, iron, nickel, and aluminum to a roll press apparatus is also a well-known technique. The powder rolling method uses a powder material with a diameter of sub-micron to several hundred microns, and can form a sheet without melting the material, so it does not normally melt together with high melting point materials such as tungsten and molybdenum. A composite material of metals can be easily formed.

  As an example of this roll press apparatus, Patent Document 1 discloses a roll press that presses a powder material without bringing the rolling roll into contact with the powder material by pressing the powder material with a rolling roll via a flat metal belt. An apparatus is disclosed.

JP-A-2-172704

  However, in the roll press apparatus shown in Patent Document 1, the rolling roll and the powder material are pressed without being in contact with each other, so that contamination of the rolling roll can be suppressed, but the effect of promoting the rolling of the powder material is small and sufficient. It is difficult to form a sheet having a sufficient strength.

  The present invention provides a roll press apparatus that can form a sheet having sufficient strength.

  A roll press apparatus according to an aspect of the present invention is a roll press apparatus that rolls and forms a powdery or sheet-shaped molding material, a rolling mechanism that rolls and molds the molding material, and heat-rolls the molding material And a pair of metal belts that pass through at least one of the rolling mechanism and the hot roll press mechanism with the molding material sandwiched therebetween, and at least one of the pair of metal belts One of the metal belts has a groove along the longitudinal direction of the metal belt.

  The roll press apparatus of the present invention can form a sheet having sufficient strength.

The front view which shows typically the roll press apparatus in Embodiment 1. FIG. The perspective view which shows the metal belt of the roll press apparatus in Embodiment 1. FIG. It is a figure which shows the metal belt of Embodiment 1, (a) is a top view, (b) is sectional drawing. The figure which shows the behavior of the powder at the time of the press at the time of using the metal belt of Embodiment 1. The figure which shows the behavior of the powder at the time of the press at the time of using the metal belt of a comparative example (A) is a front view showing the pressure receiving area of the sheet when the metal belt is thin, and (b) is a front view showing the pressure receiving area of the sheet when the metal belt is thick. The figure which shows the metal belt of Embodiment 1, and the sheet | seat after rolling. (A) is a perspective view which shows the metal belt in the modification 1 of Embodiment 1, (b) is sectional drawing of a VIIIB-VIIIB line, (c) is sectional drawing of a VIIIC-VIIIC line. The perspective view which shows the metal belt in the modification 2 of Embodiment 1. FIG. (A) is a perspective view which shows the metal belt in the modification 3 of Embodiment 1, (b) is sectional drawing of a XB-XB line | wire. Front view schematically showing a roll press apparatus in a second embodiment Front view schematically showing a roll press apparatus according to Embodiment 3. The top view which shows the sheet outer edge removal part of the roll press apparatus in another form The top view which shows the sheet outer edge removal part of the roll press apparatus in another form

(Knowledge that became the basis of the present invention)
The present inventors have found that the following problems occur with respect to the roll press apparatus described in the “Background Art” column.

  As described above, in the roll press apparatus shown in Patent Document 1, although the roll roll can be prevented from fouling, the effect of promoting the rolling of the powder material is small and it is difficult to form a sheet having sufficient strength. It is.

  In addition, when rolling and forming a powder material containing ceramics or the like, the ceramic material is difficult to form compared to a metal material, so even if it is rolled using a pair of metal belts made of a belt-like flat plate as shown in Patent Document 1, There is a problem that a sheet having sufficient strength cannot be obtained.

  In order to solve these problems, a roll press apparatus according to one aspect of the present invention is a roll press apparatus that rolls and forms a powdery or sheet-like molding material, and rolls the molding material by rolling. A mechanism, a hot roll press mechanism that heat-rolls the molding material, and a pair of metal belts that pass through at least one of the rolling mechanism and the hot roll press mechanism with the molding material sandwiched therebetween. At least one of the pair of metal belts has a groove along the longitudinal direction of the metal belt.

  As described above, since the metal belt used in the roll press apparatus has the groove portion, the molding material being pressed can be retained in the groove portion. Therefore, it is difficult for voids to be formed in the rolled sheet, and the sheet is densified. Thereby, the sheet | seat which has sufficient intensity | strength can be shape | molded.

  For example, the side surface of the groove may be tapered.

  When the side surface of the groove portion of the metal belt is tapered, the molding material is easily filled in the groove portion. Therefore, it is difficult for voids to be formed in the rolled sheet, and the sheet is densified. Thereby, the sheet | seat which has sufficient intensity | strength can be shape | molded.

  For example, the metal belt may be made of stainless steel, and the thickness of the metal belt may be 0.02 mm to 1 mm.

  If the thickness of the metal belt is 0.02 mm or more, the metal belt can be prevented from being damaged during pressing. Moreover, if the thickness of a metal belt is 1 mm or less, it can suppress that a metal belt absorbs the press load at the time of a press excessively, and the pressurization of a sheet | seat becomes inadequate. Thereby, the sheet | seat which has sufficient intensity | strength can be shape | molded.

  For example, the pair of metal belts are arranged so that the inner bottoms of the groove portions face each other, the depth of the groove portion of one of the metal belts is d1, and the depth of the groove portion of the other metal belt is d2. When the thickness of the sheet after rolling the molding material is T, 0.3T ≦ (d1 + d2) ≦ T may be satisfied.

  When the total depth (d1 + d2) of the groove portions of the metal belt is 0.3T or more, it is possible to suppress the holding of the molding material in the groove portions being insufficient. Moreover, if the sum total of the depth of a groove part is T or less, it can suppress that a clearance gap is formed between a metal belt and a molding material, and the pressurization of a sheet | seat becomes inadequate. Thereby, the sheet | seat which has sufficient intensity | strength can be shape | molded.

  For example, the metal belt may have end portions located at both ends in the width direction of the metal belt, and the width of the end portion may be not less than 2 mm and not more than 50 mm.

  If the width of the end portion of the metal belt is 2 mm or more, it is possible to suppress debris separated from the molding material from being scattered outside the metal belt when the molding material is conveyed or rolled. Moreover, if the width | variety of an edge part is 50 mm or less, it can suppress that the edge part of a metal belt bends and contacts a rolling roll and damages the surface of a rolling roll.

  For example, the metal belt may have end portions located at both ends in the width direction of the metal belt, and the surface roughness of the groove portion may be larger than the surface roughness of the end portion.

  According to this configuration, the molding material held in the groove is less likely to slip, and the shearing force applied during rolling can be sufficiently transmitted to the molding material. Thereby, densification of the sheet is promoted, and a sheet having sufficient strength can be formed.

  Moreover, the shape by which the said groove part was provided with two or more so that it might be scattered in the said longitudinal direction, and the side surface was formed in the perimeter may be sufficient.

  According to this configuration, the holding pressure of the molding material in the groove can be increased. Thereby, densification of the sheet is promoted, and a sheet having sufficient strength can be formed.

  For example, the metal belt may have end portions located at both ends in the width direction of the metal belt, and the thickness of the end portion may be different from the thickness of the groove portion.

  According to this structure, it becomes possible to make flat the surface on the opposite side to the surface in which the groove part is formed among metal belts. In that case, deformation of the groove during pressing can be suppressed, and the life of the metal belt can be extended.

  For example, the rolling roll of the hot roll press mechanism may have a Vickers hardness of 300 to 1500 at the surface of the impression cylinder at a temperature of 300 ° C. to 650 ° C.

  If Vickers hardness is 300 or more, it can suppress that a dent arises on the impression cylinder part surface at the time of hot press. Moreover, if Vickers hardness is 1500 or less, damage, such as a crack in a rolling roll, can be suppressed. Thereby, the life of the rolling roll can be extended.

  For example, the conveyance speed of the metal belt may be faster than the peripheral speeds of the rolling rolls of the rolling mechanism and the hot roll press mechanism.

  According to this configuration, insertion of the molding material between the rolling rolls is assisted, and the molding material can be smoothly conveyed. Thereby, a molding material is fully pressurized with a rolling roll, and the sheet | seat which has sufficient intensity | strength can be shape | molded.

  For example, the molding material may be a material containing ceramics.

  In the roll press apparatus of the present invention, a sheet having sufficient strength can be formed even if the molding material is a material containing ceramics that is difficult to mold.

  Hereinafter, embodiments will be described with reference to the drawings.

  It should be noted that each of the embodiments described below shows a comprehensive or specific example. Numerical values, shapes, materials, components, arrangement positions and connection forms of components, steps, order of steps, and the like shown in the following embodiments are merely examples, and are not intended to limit the present invention. In addition, among the constituent elements in the following embodiments, constituent elements that are not described in the independent claims indicating the highest concept are described as optional constituent elements.

(Embodiment 1)
[1-1. Configuration of roll press machine]
First, the overall configuration of the roll press apparatus 1 according to Embodiment 1 will be described with reference to FIG. FIG. 1 is a front view schematically showing the roll press apparatus 1.

  The roll press apparatus 1 is a horizontal roll press apparatus that conveys a molding material (powder p1 or sheet s1) in the horizontal direction. This roll press apparatus 1 includes a pair of metal belts 2a and 2b, a powder supply mechanism 100, belt transport mechanisms 101a and 101b, a rolling mechanism 102, a preheating mechanism 103, a hot roll press mechanism 104, a recovery A mechanism 105.

  In FIG. 1, the direction in which the metal belts 2a and 2b are conveyed between the powder supply mechanism 100 and the recovery mechanism 105 is defined as the conveyance direction Y, the width direction of the metal belts 2a and 2b is defined as the width direction X, and the conveyance direction. A direction orthogonal to Y and the width direction X is shown as a vertical direction Z. Moreover, the metal belts 2a and 2b in FIG. 1 show cross sections when the metal belts 2a and 2b are cut at the center in the width direction X.

  The powder supply mechanism 100 has a function of supplying the powder p1 to the metal belts 2a and 2b, and continuously supplies a certain amount of the powder p1 to the metal belts 2a and 2b. The powder supply mechanism 100 may be one that sequentially conveys a necessary amount of powder p1 such as a belt conveyor, or may be one that supplies a certain amount of powder p1 such as a hopper 3. The amount of the powder p1 is desirably supplied uniformly in the width direction X of the metal belts 2a and 2b. For example, it is desirable to have a mechanism that forcibly regulates and equalizes the height of the powder p1 supplied onto the metal belt 2a, such as a scraping plate.

  The powder p1 contains at least one kind of powdered ceramics, and may be a single powdery ceramic, a mixture of a plurality of powdered ceramics, or a powdered metal material. The mixture containing may be sufficient. The ceramic here is an inorganic compound other than a single metal, such as a metal or non-metal oxide, hydroxide, carbide, nitride, halide, carbonate, phosphate, silicate, etc. Refers to that. The particle shape of the powder p1 is preferably a spherical shape that can be easily rolled, but may be non-spherical when it is difficult to make a spherical shape in the manufacturing process. The particle size of the powder p1 varies depending on the material, but an appropriate size may be selected from ultrafine particles of 1 μm or less to several hundreds of μm, and a material obtained by granulating these particles may be used as a raw material. .

  The belt transport mechanisms 101a and 101b have a function of continuously transporting the pair of metal belts 2a and 2b so as to sandwich the powder p1. The belt conveyance mechanism 101a includes a metal belt 2a, an unwinding unit 4a, and a winding unit 5a. The belt conveyance mechanism 101b includes a metal belt 2b, an unwinding unit 4b, and a winding unit 5b. Has been. As shown in FIG. 1, each of the metal belts 2a and 2b is fed out from the unwinding portions 4a and 4b.

  One metal belt 2a is disposed horizontally between the powder supply mechanism 100 and the hot roll press mechanism 104, and receives the powder p1 supplied from the powder supply mechanism 100. The other metal belt 2b is arranged above the metal belt 2a and the powder p1 so as to sandwich the powder p1 supplied on the metal belt 2a.

  The metal belts 2a and 2b are conveyed together with the powder p1. Specifically, the metal belts 2a and 2b move between the hot roll press mechanism 104 from the rolling mechanism 102 with the powder p1 sandwiched therebetween, and are separated from the sheet s1 before the collection mechanism 105, and wound up. Recovered at the parts 5a and 5b, respectively.

  At that time, the conveying speeds of the metal belts 2a and 2b are controlled to be the same speed. Further, the conveyance speed of the metal belts 2a and 2b is slightly higher than the peripheral speed of the rolling rolls 7a and 7b of the rolling mechanism 102 and the peripheral speed of the rolling rolls 9a and 9b of the hot roll press mechanism 104. Is set. Thereby, the insertion of the powder p1 between the rolling rolls 7a and 7b and the insertion of the sheet s1 between the rolling rolls 9a and 9b are assisted and can be smoothly conveyed. In addition, the conveyance speed of metal belt 2a, 2b may be controlled so that it may become the same speed as the circumferential speed of rolling roll 7a, 7b (or 9a, 9b).

  The rolling mechanism 102 has a function of pressing and rolling the powder p1 sandwiched between the metal belts 2a and 2b with a pair of rolling rolls 7a and 7b via the metal belts 2a and 2b. In the rolling mechanism 102, the rolling rolls 7a and 7b are driven at a predetermined peripheral speed, and the powder p1 sandwiched between the metal belts 2a and 2b becomes a sheet s1 having a predetermined thickness. The rolling mechanism 102 may be a mechanical press or a hydraulic press as long as it has an ability to press with a necessary load. Moreover, you may provide the mechanism which heats the rolling rolls 7a and 7b as needed. There is no restriction | limiting in the heating method of the rolling rolls 7a and 7b, induction heating may be sufficient, heating by a resistance type heater may be sufficient, and heating by heat media, such as a vapor | steam and a liquid, may be sufficient.

  The preheating mechanism 103 has a heating furnace 8 that heats the sheet s <b> 1 press-formed by the rolling mechanism 102. If the heating furnace 8 has a capacity capable of heating the sheet s1 to a predetermined temperature during conveyance, the heating method is not limited, and an appropriate method (for example, directly by a burner) depends on the material, the thickness of the sheet s1, and the conveyance speed. Heating, induction heating, resistance heating or hot air heating) may be selected. In addition, when the conveyance speed of the sheet s1 is slow and the sheet s1 can be sufficiently heated during rolling by the hot roll press mechanism 104, the preheating mechanism 103 may not be installed.

  The hot roll press mechanism 104 rolls the sheet s1 heated to a predetermined temperature by the preheating mechanism 103 using a pair of high-temperature rolling rolls 9a and 9b. The hot roll press mechanism 104 is not limited as long as it has the ability to press with a necessary load and the ability to heat the rolling rolls 9a and 9b to a predetermined temperature. The circumferential speed of the rolling rolls 9a and 9b may be set so that the sheet s1 is smoothly conveyed, and is not necessarily the same speed as the rolling rolls 7a and 7b.

  Since the sheet s1 contains a ceramic material and cannot be sufficiently rolled at a low temperature, the rolling rolls 9a and 9b are desirably heated to at least 300 ° C. or higher. Further, if the temperature of the rolling rolls 9a and 9b exceeds 650 ° C, the temperature of the bearing portion becomes too high and the life of the oil seal, the bearing, etc. is remarkably reduced, so that the temperature during use is 300 ° C or more and 650 ° C or less. It is good to set.

  The rolling rolls 9a and 9b are preferably made of a material that can maintain high hardness in the above temperature range (300 ° C. or more and 650 ° C. or less). Specifically, SKD-based steel materials, SKH-based steel materials, ceramics, cemented carbides, and the like are preferable, and it is desirable that the Vickers hardness on the surface of the impression cylinder in the above temperature range is 300 or more and 1500 or less. If the Vickers hardness is less than 300, the surface of the impression cylinder is likely to be recessed during hot pressing, and the life of the rolling rolls 9a and 9b is significantly reduced. When the Vickers hardness exceeds 1500, although dents are difficult to occur, damage such as cracks is likely to occur, resulting in a decrease in life. In addition, it is only the impression cylinder part of the rolling rolls 9a and 9b that needs to maintain high hardness, and a shaft part may have lower hardness than it. A protective layer may be formed on the surfaces of the rolling rolls 9a and 9b in order to extend the life of the rolling rolls 9a and 9b. The protective layer also needs to have a hardness that can withstand the hot roll press, and ceramics, cemented carbide, self-fluxing alloy, or the like may be used.

  The sheet s1 rolled by the hot roll press mechanism 104 is separated from the metal belts 2a and 2b and conveyed to the recovery mechanism 105. The sheet s <b> 1 has sufficient strength by rolling, but has low flexibility and is difficult to collect by winding. Therefore, the sheet s <b> 1 is collected by being cut into a predetermined size by the collecting mechanism 105.

[1-2, Configuration of Metal Belt]
Next, a pair of metal belts 2a and 2b used in the roll press apparatus 1 will be described with reference to FIGS. FIG. 2 is a perspective view showing the metal belts 2a and 2b. 3A is a plan view of the metal belts 2a and 2b, and FIG. 3B is a cross-sectional view.

  The metal belts 2a and 2b are formed of a material such as aluminum, iron or stainless steel. The metal belts 2a and 2b are desirably stainless steel belts from the viewpoint of durability and rust prevention.

  Each of the metal belts 2a and 2b has a groove portion 23 along the longitudinal direction (conveying direction Y) and end portions 25 located at both ends in the width direction X, as shown in FIGS. . Specifically, when each of the metal belts 2a and 2b is cut along a plane perpendicular to the longitudinal direction, the metal belt 2a has a concave cross-sectional shape that is recessed downward, and the metal belt 2b is a recessed shape that is recessed upward. The cross-sectional shape is as follows. The length of the metal belts 2a and 2b is, for example, 100 m or more. However, it is sufficient to make the length sufficient in accordance with the replacement period of the metal belts 2a and 2b. The width of the groove 23 is, for example, not less than 1 mm and not more than 300 mm. The end portion 25 is provided at a position different from the groove portion 23.

  The groove portion 23 has an inner bottom 23a and both side surfaces 23b, and the side surface 23b is tapered. Specifically, both side surfaces 23b of the groove portion 23 are formed in a tapered shape from the contact point between the groove portion 23 and the end portion 25 toward the inner bottom 23a. The metal belts 2a and 2b are disposed so that the inner bottoms 23a of the groove portions 23 face each other. With this arrangement, a holding region 26 for holding the powder p1 and the sheet s1 is formed between the metal belts 2a and 2b.

  FIG. 4 is a diagram showing the behavior of the powder p1 during pressing when the metal belts 2a and 2b are used. FIG. 5 is a diagram illustrating the behavior of the powder p1 during pressing when the metal belt 502 of the comparative example is used.

  The metal belt 502 of the comparative example is composed of a pair of strip-shaped flat plates as shown in FIG. When pressing is performed using the metal belt 502 of the comparative example, the powder p1 (or the sheet s1) between the pair of metal belts 502 moves in the width direction X, and the pressed sheet s1 (molded product) is densified. The strength of the sheet s1 tends to be insufficient.

  On the other hand, when pressing using the metal belts 2a and 2b of the present embodiment, the movement of the powder p1 (or the sheet s1) can be stopped by the side surface 23b of the groove 23 as shown in FIG. Thereby, densification of the sheet s1 after pressing can be promoted. Furthermore, since the side surface 23b of the groove 23 is tapered, the powder p1 and the sheet s1 are easily filled up to the end of the holding region 26 formed by the groove 23. Therefore, it is difficult to form a void in the sheet s1, and the densification of the sheet s1 is further promoted. Further, in the end portion (outer edge portion) of the sheet s1, it is possible to reduce a region A2 (see FIG. 13) where rolling is insufficient.

  Moreover, the groove part 23 of metal belt 2a, 2b also has a function which suppresses that the fragment | piece isolate | separated from the powder p1 and the sheet | seat s1 at the time of conveyance or rolling disperses out of the metal belt 2a, 2b. For example, when a metal belt (for example, metal belt 502) having no groove 23 is used, the above-mentioned debris enters between the rolls or between the parts of the equipment, leading to damage of the roll surface and overloading of the equipment, and the life of the equipment. May cause degradation and process stability degradation. Since the metal belts 2a and 2b according to the present embodiment can confine the powder p1 (or the sheet s1) in the groove 23, it is possible to suppress the above-described decrease in equipment life and process stability.

  The width (the dimension in the X direction) of the end portions 25 of the metal belts 2a and 2b is desirably 2 mm or more and 50 mm or less. The reason is that if the width of the end portion 25 is less than 2 mm, debris separated from the powder p1 and the sheet s1 during conveyance or rolling may be scattered outside the metal belts 2a and 2b. Further, if the width of the end portion 25 exceeds 50 mm, the end portions 25 of the metal belts 2a and 2b bend and easily come into contact with the rolling rolls 7a and 7b and the rolling rolls 9a and 9b, so that the roll surface may be damaged. Because there is.

  The thickness of the metal belts 2a and 2b (thickness of the plate material) varies depending on the material. For example, in the case of a stainless steel belt, the thickness is preferably 0.02 mm to 1 mm, and more preferably 0.02 mm. More preferably, it is 0.2 mm or less.

  For example, when the thickness of the metal belts 2a and 2b is less than 0.02 mm, the metal belts 2a and 2b may be damaged without being able to withstand the load during pressing, and when the thickness exceeds 0.2 mm, There are cases where the metal belts 2a and 2b excessively absorb the pressing load during pressing and the sheet s1 cannot be sufficiently pressed. Furthermore, when the thickness of the metal belts 2a and 2b exceeds 1 mm, the bending rigidity of the metal belts 2a and 2b is increased as shown in FIG. The pressure receiving area A1 increases, the maximum pressure applied to the sheet s1 decreases, and rolling may be insufficient. Therefore, when the metal belts 2a and 2b are stainless steel belts, it is desirable that they are 0.02 mm or more and 1 mm or less.

  Next, the dimensional relationship between the metal belts 2a and 2b and the rolled sheet s1 will be described with reference to FIG. FIG. 7 is a diagram illustrating the metal belts 2a and 2b and the rolled sheet s1.

  In the roll press apparatus 1 of the present embodiment, the depth of the groove 23 of one metal belt 2a is d1, the depth of the groove 23 of the other metal belt 2b is d2, and the sheet s1 after rolling the molding material When the thickness is T, the relationship is set such that 0.3T ≦ (d1 + d2) ≦ T. The depths d1 and d2 are the depths at the position where the depth of the corresponding groove 23 is maximum.

  For example, if the total depth (d1 + d2) of the grooves 23 is smaller than 0.3T, the effect of holding the powder p1 and the sheet s1 becomes insufficient, and the densification of the sheet s1 by rolling may not sufficiently proceed. . On the other hand, if the total depth (d1 + d2) of the groove portion 23 is larger than T, there is a gap between the metal belts 2a, 2b and the sheet s1 during pressing, so pressurization is insufficient, and the metal belt 2a, Since the groove 23 of 2b is excessively deformed, the metal belts 2a and 2b may be damaged. Therefore, it is desirable that the dimensions of the metal belts 2a and 2b and the rolled sheet s1 have a relationship of 0.3T ≦ (d1 + d2) ≦ T.

  Further, it is desirable that the surface roughness of the groove portion 23 in contact with the powder p1 or the sheet s1 (for example, the inner bottom 23a) is larger than the surface roughness of the end surface 25a on the same surface as the contact surface. The surface roughness referred to here is, for example, the arithmetic average roughness Ra defined by JIS B 0601 or the maximum height Rz.

  Since the surface roughness of the groove 23 is large, the powder p1 or the sheet s1 held in the groove 23 is difficult to slip, and the shear force applied during rolling can be sufficiently transmitted to the powder p1 and the sheet s1, The densification of the sheet s1 can be further promoted. Further, since the end portion 25 is smooth, when the end portions 25 of the metal belts 2a and 2b are brought close to each other, it is difficult to form a gap between the metal belts 2a and 2b, and the metal belts 2a and 2b are separated from the powder p1 and the sheet s1. The broken pieces will not fall easily.

[1-3. Effect]
A roll press apparatus 1 according to the present embodiment is a roll press apparatus 1 that rolls and forms a powdery or sheet-like molding material (powder p1 or sheet s1), and a rolling mechanism 102 that rolls and molds the molding material. A hot roll press mechanism 104 that heat-rolls the molding material, and a pair of metal belts 2a and 2b that pass through at least one of the rolling mechanism 102 and the hot roll press mechanism 104 with the molding material sandwiched therebetween. And at least one metal belt 2a (or 2b) of the pair of metal belts 2a and 2b has a groove 23 along the longitudinal direction of the metal belts 2a and 2b.

  Thus, since the metal belts 2a and 2b used in the roll press apparatus 1 have the groove 23, the molding material being pressed can be retained in the groove 23. Therefore, it is difficult to form voids in the rolled sheet s1, and the sheet s1 is densified. Thereby, the sheet s1 having sufficient strength can be formed.

  Moreover, according to the roll press apparatus 1 which concerns on this Embodiment, even if the molding material is a material containing the ceramic which is hard to shape | mold, the sheet | seat s1 which has sufficient intensity | strength can be shape | molded.

(Modification 1 of Embodiment 1)
8A is a perspective view showing metal belts 2a and 2b in Modification 1 of Embodiment 1, FIG. 8B is a sectional view taken along line VIIIB-VIIIB, and FIG. 8C is VIIIC-VIIIC. It is sectional drawing of a line.

  A plurality of metal belts 2a, 2b of Modification 1 are provided such that the groove portions 23 are scattered in the longitudinal direction. The metal belts 2 a and 2 b have a concave cross section cut perpendicular to the longitudinal direction (conveying direction Y) and a concave cross section cut perpendicular to the width direction X. Further, when the metal belts 2a and 2b are viewed in plan (when viewed from the vertical direction Z), the groove portion 23 is rectangular, has both side surfaces 23b in the width direction X, and has both side surfaces 23b in the longitudinal direction. ing. That is, the side surface 23b is formed in the groove part 23 of the metal belts 2a and 2b in the whole periphery.

  In the metal belts 2a and 2b in the first modification, since the side surfaces are formed on the entire circumference of the groove 23, the holding pressure of the powder p1 (or the sheet s1) by the metal belts 2a and 2b can be increased, and the sheet s1 Can be further refined. Thereby, the sheet s1 having sufficient strength can be formed.

  The shape of the groove 23 is not limited as long as a region surrounded by the pair of metal belts 2a and 2b can be formed, and a plurality of grooves 23 are formed in the width direction X and the conveyance direction Y of the metal belts 2a and 2b. They may be arranged, their arrangement may be regular or irregular, or they may have overlapping shapes.

(Modification 2 of Embodiment 1)
FIG. 9 is a perspective view showing metal belts 2a and 2b in the second modification of the first embodiment.

  In the second modification, one metal belt 2a has a groove 23, but the other metal belt 2b does not have a groove 23 and is a belt of belt-like flat plate.

  In the roll press device 1 according to the second modification, since one metal belt 2 a has the groove 23, the molding material being pressed can be retained in the groove 23. Therefore, it is difficult to form voids in the rolled sheet s1, and the sheet s1 is densified. Thereby, the sheet s1 having sufficient strength can be formed.

(Modification 3 of Embodiment 1)
FIG. 10A is a perspective view showing a metal belt 2a in Modification 3 of Embodiment 1, and FIG. 10B is a cross-sectional view taken along line XB-XB.

  One metal belt 2a in Modification 3 is different in the thickness ta of the groove portion 23 and the thickness tb of the end portion 25. Specifically, thickness ta <thickness tb.

  In the metal belt 2a, the outer bottom surface of the groove portion 23 and the lower surface of the end portion 25 are the same surface. Specifically, the surface opposite to the surface on which the groove portion 23 is formed and the lower surface of the end portion 25 are flat. Thereby, the deformation | transformation of the groove part 23 at the time of a press can be suppressed, and the lifetime of the metal belt 2a can be extended.

  As the other metal belt 2b facing the metal belt 2a, a metal belt in which the metal belt 2a of the third modification is disposed upside down may be used. 2b may be used.

(Embodiment 2)
Next, the roll press apparatus 1A in Embodiment 2 will be described. FIG. 11 is a front view schematically showing a roll press apparatus 1A in the second embodiment. Note that constituent elements having functions similar to those shown in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and redundant description is omitted.

  The roll press apparatus 1A includes metal belts 2c, 2d, 2e, and 2f corresponding to the belt transport mechanisms 101c, 101d, 101e, and 101f, respectively. Each of the pair of metal belts 2c and 2d is unwound from the unwinding portions 4c and 4d, conveyed to the rolling mechanism 102, separated from the sheet s1, and wound on the winding portions 5c and 5d, respectively. Each of the pair of metal belts 2e and 2f is unwound from the unwinding portions 4e and 4f, conveyed to the hot roll press mechanism 104, and then separated from the sheet s1 and wound around the winding portions 5e and 5f. Taken.

  The rolling mechanism 102 presses and rolls the powder p1 sandwiched between the metal belts 2c and 2d with a pair of rolling rolls 7c and 7d via the metal belts 2c and 2d. The rolled sheet s 1 is sent to the hot roll press mechanism 104 via the preheating mechanism 103. The hot roll press mechanism 104 presses and rolls the sheet s1 sandwiched between the metal belts 2e and 2f with a pair of rolling rolls 9e and 9f via the metal belts 2e and 2f. The rolled sheet s1 is sent to the collection mechanism 105 and collected.

  1 A of roll press apparatuses which concern on this Embodiment are roll press apparatuses 1A which roll and shape | mold a powdery or sheet-like molding material, Comprising: The rolling mechanism 102 which rolls and shape | molds a molding material, and heat-rolls a molding material A pair of metal belts 2c and 2d that pass through the rolling mechanism 102 with the molding material sandwiched therebetween, and a pair of rollers that pass through the hot roll press mechanism 104 with the molding material sandwiched therebetween. Metal belts 2e and 2f, and at least one of the metal belts 2c and 2d and the metal belts 2e and 2f is along the longitudinal direction of the metal belts 2a to 2f. The side surface 23b of the groove part 23 is tapered.

  Thus, since the metal belts 2c, 2e (or 2d, 2f) used in the roll press apparatus 1A have the groove 23, the molding material being pressed can be retained in the groove 23. Therefore, it is difficult to form voids in the rolled sheet s1, and the sheet s1 is densified. Thereby, the sheet s1 having sufficient strength can be formed.

(Embodiment 3)
Next, the roll press apparatus 1B in Embodiment 3 is demonstrated. FIG. 12 is a front view schematically showing a roll press apparatus 1B in the third embodiment. Note that constituent elements having functions similar to those shown in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and redundant description is omitted.

  The roll press apparatus 1B is a vertical roll press apparatus that conveys the powder p1 and the sheet s1 in the vertical direction Z, and includes metal belts 2g and 2h corresponding to the belt conveyance mechanisms 101g and 101h, respectively.

  In this roll press apparatus 1B, the powder p1 stored in the hopper 3 is rolled by the rolling rolls 7g and 7h to be sent out as a sheet s1. The fed sheet s1 is preheated in the heating furnace 8 and hot pressed by the rolling rolls 9g and 9h via the metal belts 2g and 2h. Each of the pair of metal belts 2g and 2h is unwound from the unwinding portions 4g and 4h, conveyed to the hot roll press mechanism 104, and then separated from the sheet s1 and wound around the winding portions 5g and 5h, respectively. . The hot-pressed sheet s1 is sent to the collection mechanism 105 and collected.

  A roll press apparatus 1B according to the present embodiment is a roll press apparatus 1B that rolls and forms a powdery or sheet-shaped molding material, and includes a rolling mechanism 102 that rolls and molds the molding material, and heat-rolls the molding material. And a pair of metal belts 2g and 2h that pass through the hot roll press mechanism 104 with a molding material sandwiched therebetween, and at least one of the metal belts 2g and 2h. 2g (or 2h) has the groove part 23 along the longitudinal direction of the metal belts 2g and 2h, and the side surface 23b of the groove part 23 is tapered.

  Thus, since the metal belt 2g (or 2h) used in the roll press apparatus 1B has the groove 23, the molding material being pressed can be retained in the groove 23. Therefore, it is difficult to form voids in the rolled sheet s1, and the sheet s1 is densified. Thereby, the sheet s1 having sufficient strength can be formed.

(Example)
In this example, the result of rolling and forming the powder p1 with the roll press apparatus 1 in the first embodiment will be described. As the powder p1, calcium phosphate powder having primary particles of 1 μm or less was used. The powder p1 was supplied to the metal belts 2a and 2b, and conveyed and rolled at a speed of 0.5 m / min. Specifically, the powder p1 is formed into a sheet having a thickness of 1.5 mm by the rolling mechanism 102, heated to 600 ° C. by the preheating mechanism 103, and then heated by the hot roll press mechanism 104 in which the roll temperature is set to 600 ° C. Rolled. The metal belts 2a and 2b are made of stainless steel having a thickness of 0.1 mm, and the depths d1 and d2 of the groove 23 are equal to the thickness of the sheet s1. As a result, a porous sheet s1 having a thickness of about 1 mm was obtained after hot roll pressing. It was confirmed that no conspicuous cracks or breakage occurred in the sheet s1, and the sheet s1 has a strength that does not break even when conveyed as a single sheet.

(Other forms)
As mentioned above, although the roll press apparatus which concerns on one or several aspects was demonstrated based on embodiment, this invention is not limited to this embodiment. Unless it deviates from the main point of this invention, the form which carried out various deformation | transformation which those skilled in the art can think to this embodiment, and the form constructed | assembled combining the component in a different embodiment is also the range of one or several aspects. May be included.

  For example, as shown in FIG. 13, when an area A <b> 2 that is insufficiently pressed and insufficiently rolled is formed at the end (outer edge) in the width direction X of the sheet s <b> 1, The sheet outer edge removing unit 10 having the above may be provided to remove the region A2.

  Further, the sheet s1 does not need to have a continuous shape from the rolling mechanism 102 to the recovery mechanism 105 as shown in the first embodiment, that is, a strip shape. For example, the sheet s1 is cut into pieces after powder rolling, and the sheet s1 You may process. In this case, as shown in FIG. 14, a region A2 in which the pressure is insufficient and the rolling is insufficient is also formed at the end (outer edge) in the conveyance direction Y of the sheet s1. A region 10 may be provided to remove the region A2.

  For example, in the first embodiment, only one hot roll press mechanism 104 is installed, but the number is not limited to one, and a plurality of hot roll press mechanisms 104 may be arranged as necessary.

  For example, in the first embodiment, instead of the unwinding portions 4a and 4b and the winding portions 5a and 5b, a roll that circulates a metal belt may be installed, and an endless belt (endless belt) shaped metal belt may be used. Good. In addition, a metal belt may be formed in a sleeve shape and attached to each roll surface, and a belt transport mechanism may not be provided in a partial region of the roll press apparatus. In the case of the above configuration, a conveyor or the like for assisting the conveyance of the sheet s1 may be provided as necessary.

  According to the roll press apparatus in the aspect of the present invention, a sheet having sufficient strength can be formed from a powder even if the powder has poor formability. By using this sheet or a material using this as a starting material, industrial uses such as semiconductor parts, in-vehicle parts, electronic parts, living body parts materials, battery materials and the like can be expected.

1, 1A, 1B Roll press device 2a, 2b, 2c, 2d, 2e, 2f, 2g, 2h Metal belt 3 Hopper 4a, 4b, 4c, 4d, 4e, 4f, 4g, 4h Unwinding part 5a, 5b, 5c 5d, 5e, 5f, 5g, 5h Winding part 7a, 7b, 7c, 7d, 7e, 7f, 7g, 7h Rolling roll 8 Heating furnace 9a, 9b, 9c, 9d, 9e, 9f, 9g, 9h Rolling roll DESCRIPTION OF SYMBOLS 10 Sheet outer edge removal part 23 Groove part 23a Groove part inner bottom 23b Side surface of groove part 25 End part 25a End part surface 26 Holding area | region 100 Powder supply mechanism 101a, 101b, 101c, 101d, 101e, 101f, 101g, 101h Belt conveyance mechanism 102 Rolling Mechanism 103 Preheating mechanism 104 Hot roll press mechanism 105 Recovery mechanism A1 Pressure receiving area A2 Rolling insufficient area d 1, d2 Depth of groove part p1 Powder s1 Sheet T Thickness of sheet after rolling ta Thickness of groove part of metal belt tb Thickness of edge part of metal belt

Claims (11)

A roll press apparatus for rolling and molding a powdery or sheet-like molding material,
A rolling mechanism for rolling and molding the molding material;
A hot roll press mechanism for heating and rolling the molding material;
A pair of metal belts that pass through at least one of the rolling mechanism and the hot roll press mechanism with the molding material sandwiched therebetween;
Have
At least one of the pair of metal belts has a groove along the longitudinal direction of the metal belt. The roll press apparatus according to claim 1, wherein a side surface of the groove portion is tapered. The metal belt is made of stainless steel,
The roll press apparatus according to claim 1 or 2, wherein the metal belt has a thickness of 0.02 mm to 1 mm. The pair of metal belts are arranged so that the inner bottoms of the groove portions face each other,
When the depth of the groove portion of one of the metal belts is d1, the depth of the groove portion of the other metal belt is d2, and the thickness of the sheet after rolling the molding material is T, 0.3T ≦ The roll press apparatus according to claim 1, wherein (d1 + d2) ≦ T. The metal belt has end portions located at both ends in the width direction of the metal belt,
The roll press apparatus according to any one of claims 1 to 4, wherein a width of the end portion is 2 mm or more and 50 mm or less. The metal belt has end portions located at both ends in the width direction of the metal belt,
The roll press apparatus of any one of Claims 1-5 whose surface roughness of the said groove part is larger than the surface roughness of the said edge part. The roll press apparatus according to claim 1, wherein a plurality of the groove portions are provided so as to be scattered in the longitudinal direction, and a side surface is formed on the entire circumference. The metal belt has end portions located at both ends in the width direction of the metal belt,
The roll press apparatus according to claim 1, wherein a thickness of the end portion is different from a thickness of the groove portion. The roll according to any one of claims 1 to 8, wherein the rolling roll of the hot roll press mechanism has a Vickers hardness of 300 to 1500 at a temperature of 300 to 650 ° C. Press device. The roll press apparatus of any one of Claims 1-9 whose conveyance speed of the said metal belt is faster than the peripheral speed of each rolling roll of the said rolling mechanism and the said hot roll press mechanism. The roll press apparatus according to claim 1, wherein the molding material is a material containing ceramics.

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