JP5905764B2 - Crushing device and stirring device - Google Patents

Description

  The present invention relates to a pulverizing apparatus that performs pulverization, pulverization, or dispersion, and a container that is used in an agitation apparatus that performs stirring or defoaming.

  Conventionally, in order to pulverize, pulverize, or disperse an object to be pulverized, a pulverizing apparatus as shown in Patent Document 1 is used. In this pulverizer, a container filled with a liquid is filled with a pulverizing medium such as a ball or bead, a rotor having a rotating shaft disposed in the center of the container is rotated, and an object to be crushed is placed in the container. The slurry mixed with liquid is pumped in and the grinding medium is moved by the rotation of the rotor, and the pulverized material is crushed and crushed using the impact force, frictional force, compressive force, and shearing force due to the kinetic energy. Or it is something to disperse.

  In particular, a wet medium stirring type pulverizer (bead mill apparatus) has high pulverization efficiency and is suitable for extremely fine pulverization at a submicron to nano level.

  And as a container of these grinding | pulverization apparatuses, the thing made from a ceramic or resin with high abrasion resistance is used. Particularly in recent years, ceramics such as alumina, zirconia, zirconia reinforced alumina (ZTA) or silicon carbide are often used.

  By the way, the kinetic energy of the above-mentioned grinding medium is very little used for grinding, crushing or dispersing, and most of it becomes thermal energy. If the liquid in the container continues to rise in temperature due to this thermal energy, the material to be crushed may be altered. Therefore, the pulverizer is required to cool the container and suppress the temperature rise of the liquid in the container.

  On the other hand, the crushing apparatus 101 shown in FIG. 8 fixes the container (vessel) 102 in the covering member (jacket) 103 with an O-ring 105 or the like, and cools between the container 102 and the covering member 103 on the outer peripheral portion. A flow path 104 for passing the medium is provided to cool the container 102 directly.

  However, the pulverizing apparatus having such a cooling structure can only cool the central portion of the container and the like, and the cooling effect is insufficient. Therefore, there is a demand for a pulverizing apparatus that is excellent in container cooling.

Japanese Patent Laid-Open No. 5-220373

  The present invention provides a container that meets the demand for improved cooling, and a powder device and a stirring device using the same.

Milling device according to one embodiment of the present invention, there is provided a grinding apparatus comprising a container, a covering member for covering the container, and you position flow path between the cover member and the container, the The container includes a container main body made of a ceramic sintered body, and a metal member made of an aluminum alloy or a copper alloy that surrounds the outer periphery of the container main body and is connected to the outer wall of the container main body. It is characterized in that it is partially cooled from the outside when a part of the region comes into contact with the cooling medium flowing through the path .

A stirrer according to an aspect of the present invention is a pulverization apparatus including a container, a covering member that covers the container, and a flow channel that is positioned between the container and the covering member. A container main body made of a ceramic sintered body, and a metal member made of an aluminum alloy or a copper alloy surrounding the outer periphery of the container main body and connected to the outer wall of the container main body. A part of the region is in contact with the flowing cooling medium, so that it is partially cooled from the outside.

  According to the container of the present invention, the container main body can be cooled via the metal member having high thermal conductivity, so that the inside of the container can be cooled uniformly, and thus a container having excellent cooling performance can be obtained. it can.

  Moreover, according to the pulverization apparatus of the present invention, since the container is provided, the inside of the container can be cooled well.

  Moreover, according to the stirring apparatus of this invention, since the said container is provided, the inside of a container can be cooled favorably.

It is sectional drawing along the up-down direction of the grinding | pulverization apparatus which concerns on one Embodiment of this invention. It is sectional drawing along the up-down direction of the container which concerns on one Embodiment of this invention. It is sectional drawing along the up-down direction of the container which concerns on other embodiment of this invention. It is sectional drawing along the up-down direction of the container which concerns on other embodiment of this invention. It is sectional drawing along the up-down direction of the container which concerns on other embodiment of this invention. It is sectional drawing along the up-down direction of the container which concerns on other embodiment of this invention. It is sectional drawing along the up-down direction of the container which concerns on other embodiment of this invention. It is sectional drawing along the up-down direction of the conventional grinding | pulverization apparatus.

  Hereinafter, a grinding apparatus using a container according to an embodiment of the present invention will be described in detail with reference to the drawings.

  The pulverizing apparatus 1 of the present embodiment shown in FIG. 1 pulverizes, disintegrates or disperses an object such as an electronic component material, a ceramic raw material, glass powder, food, cosmetics, battery material, or paint. is there. The pulverizing apparatus 1 includes a cylindrical container 2 (vessel), a cylindrical covering member 3 (jacket) covering the container 2, a flow path 4 positioned between the container 2 and the covering member 3, An O-ring 5 that fixes the vertical position of the container 2, a lid 6 that closes one opening of the container 2, a bottom plate 7 that closes the other opening of the container 2, a lid fitting 8 that covers the lid 6, and a bottom plate 7 The bottom plate metal fitting 9 to cover is included.

  The covering member 3 protects the container 2 from external impacts and is made of a metal such as stainless steel. The covering member 3 has a recess on the surface on the container 2 side, and a space is formed between the covering member 3 and the container 2 by the recess to form a flow path 4. The flow path 4 is a place where a cooling medium such as water is circulated, and the cooling medium can cool the container 2 and adjust the temperature inside the container 2.

The lid 6 and the bottom plate 7 form a crushing chamber for crushing an object in the container 2 by closing the opening of the container 2. The lid 6 and the bottom plate 7 are made of a ceramic sintered body in the same manner as the container body described later. On the outside, a lid fitting 8 and a bottom plate fitting 9 made of metal such as stainless steel are formed. Bolts for fastening bolts are formed in the lid fitting 8 and the bottom plate fitting 9 and are fixed to the covering member 3 by bolts 10 or the like. In addition, a through hole into which a main shaft of the rotor described later is inserted is formed in the center portion of the bottom plate 7 and the bottom plate metal fitting 9. If necessary, a through hole for pumping a slurry in which an object is mixed with a solvent such as water into the container 2 and a through hole for collecting the slurry are provided in the bottom plate 4, the lid 6, or the container 2. Alternatively, the cover member 3 may be formed.

  The pulverizing apparatus 1 described above is used as follows. First, a slurry in which an object is mixed with a solvent such as water, a grinding medium such as a steel ball or a ceramic ball, and a rotor for stirring are arranged inside the container 2. Then, the object and the grinding medium are agitated by rotating the rotor, and the object is pulverized, crushed or dispersed using the impact force, frictional force, compressive force, and shearing force due to the kinetic energy of the grinding medium. Let

  Next, the container 2 of this embodiment will be described in detail.

  As illustrated in FIG. 2, the container 2 of the present embodiment includes a cylindrical container body 11 and a metal member 12 that surrounds the outer periphery of the container body 11 and is connected to the outer wall of the container body 11.

  The container main body 11 is a member in which an object and a grinding medium are placed, and since stirring is performed inside, the container main body 11 is required to have wear resistance and high thermal conductivity. The container body 11 is made of a ceramic sintered body. As a result, since the wear resistance of the container body 11 is high, wear of the inner wall of the container body 11 can be reduced when pulverizing, crushing, or dispersing. Furthermore, since the container main body 11 is made of a ceramic sintered body, it is possible to suppress the mixing of foreign matters such as metal contamination with respect to the object put inside.

  As this ceramic sintered body, for example, a material mainly composed of alumina, zirconia, silicon nitride, silicon carbide, zirconia reinforced alumina (ZTA) or the like can be used. Among them, it is desirable to use a material mainly composed of zirconia-reinforced alumina or silicon carbide in terms of high thermal conductivity and excellent wear resistance.

  Zirconia reinforced alumina is a ceramic in which zirconia particles are dispersed in alumina as a main component. This zirconia reinforced alumina contains, for example, 60% by mass or more of alumina and 3% by mass or more of zirconia. The content ratio (mass%) of alumina and the content ratio (mass%) of zirconia in the zirconia reinforced alumina may be FP method semi-quantitative analysis using, for example, a fluorescent X-ray apparatus.

  The metal member 12 is a member that is partially cooled from the outside of the container 2 when a part of the region (cooling region R) is in contact with the cooling medium flowing through the flow path 4. Moreover, since the metal member 12 is arranged on the outer side of the container 2 and is made of a metal having higher elasticity than ceramics, the metal member 12 also functions as a buffer material against an external impact on the container body 11.

  The metal member 12 is made of an aluminum alloy or a copper alloy. As the aluminum alloy, Al-Cu alloys such as A2014, A2017, and A2117, Al-Mg alloys such as A5052, Al-Zn-Mg alloys such as A7075, and the like can be used. If there is a concern such as rust, the surface of the aluminum alloy may be alumite treated. Moreover, brass (brass), a copper nickel alloy, etc. can be used as a copper alloy.

By the way, in the pulverizing apparatus 1 described above, when pulverizing, pulverizing or dispersing inside the container 2, the kinetic energy of the pulverizing medium is very little used for pulverizing, pulverizing or dispersing, and most of them are used. Since it becomes thermal energy, the temperature inside the container 2 tends to rise.

  On the other hand, as described above, the container 2 of the present embodiment is made of an aluminum alloy or a copper alloy that surrounds the outer periphery of the container main body 11 and is connected to the outer wall of the container main body 11 while being made of a ceramic sintered body. The metal member 12 partially includes a cooling region R that is cooled by the cooling medium of the flow path 4.

  Thus, since the metal member 12 consists of an aluminum alloy or a copper alloy, it can make thermal conductivity high compared with the container main body 11 which consists of ceramic sintered bodies. Therefore, when the metal member 10 is cooled from the outside, even if it is partial cooling, the entire metal member 10 is efficiently cooled and functions as an excellent cooling member for the container body 11. As a result, compared with the case where the cooling medium is in direct contact with the container body 11, the entire container body 11 can be cooled uniformly and efficiently, so that the object disposed inside the container 2 can be cooled uniformly and efficiently. As a result, the container 2 excellent in internal cooling can be obtained. By using the container 2 to pulverize, crush or disperse the object, it is possible to satisfactorily suppress the deterioration of the object.

  The thermal conductivity of the metal member 12 is set to 100 W / m · K or more and 400 W / m · K or less, for example. Moreover, the thermal conductivity of the container main body 11 is set to 3 W / m · K or more and 200 W / m · K or less, for example. When the ceramic sintered body of the container body 11 is mainly composed of zirconia reinforced alumina, the thermal conductivity of the container body 11 is set to, for example, 15 W / m · K or more and 30 W / m · K or less. . Moreover, when the ceramic sintered body of the container main body 11 has silicon carbide as a main component, the thermal conductivity of the container main body 11 is set to 60 W / m · K or more and 200 W / m · K or less, for example. When a ceramic sintered body having a high thermal conductivity such as silicon carbide is used, a metal member 12 having a higher thermal conductivity than the container body 11 such as a copper alloy is selected and used. That's fine. The thermal conductivity of each of these members is measured by, for example, a laser flash method by a measuring method according to JIS C2141-1992.

  Moreover, since the metal member 12 consists of an aluminum alloy or a copper alloy, compared with the container main body 11 which consists of ceramic sintered bodies, a thermal expansion coefficient is large. Therefore, as described above, when the metal member 12 is disposed on the outer peripheral side of the container main body 11, even if the temperature inside the container 2 rises, the thermal expansion amount of the container main body 11 is the thermal expansion of the metal member 12. Since it is smaller than the amount, the container body 11 is not subjected to thermal stress from the outer periphery, and the container body 11 is not easily damaged. The thermal expansion coefficient of the container body 11 is set to, for example, 3.5 ppm / ° C. or more and 8 ppm / ° C. or less, and the thermal expansion coefficient of the metal member 12 is set to, for example, 16 ppm / ° C. or more and 23 ppm / ° C. or less. Yes. The coefficient of thermal expansion of each member is measured using a commercially available TMA (Thermo-Mechanical Analysis) apparatus.

  In the present embodiment, the container body 11 is fitted to the metal member 12 while being in contact with the metal member 12. Therefore, since the container main body 11 and the metal member 12 are in direct contact with each other, it is possible to suppress the interposition of a layer such as air serving as a heat insulating material between the container main body 11 and the metal member 12. As a result, the container body 11 can be efficiently cooled by the metal member 12.

  Moreover, since the container main body 11 is fitted to the metal member 12, the metal member 12 is unlikely to be detached from the container main body 11, and is difficult to deteriorate over time. Moreover, the container 2 can be used for the use use which cannot use an adhesive agent, when using solvents, such as alcohol.

  In the present embodiment, the thickness of the metal member 12 can be made smaller than the thickness of the container body 11. By thinning the metal member 12 in this way, the container 2 can be reduced in weight. Further, since the container body 11 is made of a ceramic sintered body and its rigidity (Young's modulus) is as high as 200 GPa or more and 450 GPa or less, it is possible to make the metal member 12 thin while maintaining the shape of the metal member 12 by the container body 11. it can. In addition, the thickness of the container main body 11 is set to 1 mm or more and 15 mm or less, for example, and the thickness of the metal member 12 is set to 0.5 mm or more and 10 mm or less, for example.

  The container 2 described above can be manufactured as follows.

  First, a ceramic powder is molded using various molding methods to obtain a molded body. Next, the molded body is cut into a desired shape and then fired to obtain a container body 11 made of a ceramic sintered body. Next, the metal member 12 is obtained by performing lathe processing or the like on the metal. Next, the container main body 11 and the metal member 12 are joined by fitting the container main body 11 to the metal member 12 by shrink fitting. The container 2 can be produced as described above. In addition, after joining the container main body 11 and the metal member 12, as needed, the inner wall of the container main body 11 may be ground, or the outer wall of the metal member 12 may be cut or ground.

  The present invention is not limited to the above-described embodiments, and various modifications, improvements, combinations, and the like can be made without departing from the scope of the present invention.

  For example, in the above-described embodiment, the configuration in which the container 2 is used as a pulverizing apparatus has been described as an example. However, the container 2 is used in various apparatuses that require wear resistance, suppression of metal contamination, and a cooling effect. For example, you may use for the stirring apparatus which performs stirring or defoaming.

  In the above-described embodiment, the configuration in which the container 2 is cylindrical has been described as an example. However, other shapes can be used as the shape of the container 2.

  For example, as shown in FIGS. 3 and 4, a bottomed (cup-shaped) cylindrical body may be used. Alternatively, the metal member 12 may be a cylindrical body, and only the container body 11 may have a bottomed shape. In addition, in FIG. 3, the cylinder part 2a and the bottom part 2b of the container main body 11 are an integral thing. Moreover, in FIG. 4, the cylinder part 2a and the bottom part 2b of the container main body 11 are separate members. For example, the cylinder part is obtained by bonding using an adhesive such as an epoxy-based adhesive or mechanical fastening using a bolt. 2a and the bottom 2b are joined. In this case, it is not necessary to use the same material for the cylindrical portion 2a and the bottom portion 2b. For example, the material may be changed in consideration of the state of wear and the effect of cooling.

  Moreover, as a shape of the metal member 12, for example, as shown in FIG. As a result, the space for the cooling medium 12 can be increased.

  Moreover, in embodiment mentioned above, although the structure which joined the container main body 11 and the metal member 12 by shrink-fitting was demonstrated to the example, as a joining method of the container main body 11 and the metal member 12, other joining methods are used. Can do.

For example, as shown in FIG. 6, an adhesive layer 14 made of an adhesive is interposed between the container body 11 and the metal member 12 by bonding the container body 11 and the metal member 12 using an adhesive. May be. In this case, since the container main body 11 and the metal member 12 can be firmly fixed, even if there is a rotor that rotates inside the container main body 11, the container main body 11 is moved by the metal member 12 during operation of the rotor. It can suppress that only the container main body 11 rotates without being fixed (corotation). As the adhesive, an epoxy adhesive may be used, or an anaerobic adhesive suitable for the gap may be used.

  The thickness of the adhesive layer 14 is smaller than the thickness of the container body 11 and the metal member 12. The thickness of the adhesive layer 14 is preferably 1 mm or less, and more preferably 0.5 mm or less. As a result, by reducing the thickness of the adhesive layer 6, loss of heat conduction between the container body 11 and the metal member 12 due to the adhesive layer 6 can be reduced.

  Further, as another joining method, as shown in FIG. 7, a method of caulking the end portion of the metal member 12 against the end surface of the container main body 11 can be used. Specifically, this is performed as follows.

  First, a tapered portion 11 c is formed in the vicinity of one end surface portion of the container body 11. Further, a caulking portion 12a is formed at one end portion of the metal member 12, and a collar portion 12b is formed at the other end portion. Next, the container main body 11 is accommodated in the metal member 12 so that the other end surface of the container main body 11 is placed on the collar portion 12 b. Next, the container main body 11 is mechanically fixed in the vertical direction by rolling the caulking portion 12a using a rolling roller or the like and accommodating the caulking portion 12a in the tapered portion 11c. After caulking in this way, if necessary, one end surface of the container body 11 and one end surface of the caulking portion 12a are both ground to finish a flat surface. As described above, the container body 11 and the metal member 12 can be joined. In this case, as with shrink fitting, it is difficult to deteriorate over time. Since the metal member 12 is formed from an aluminum alloy or a copper alloy, it is rich in ductility and can be easily caulked.

  In the embodiment described above, the configuration in which the outer wall of the metal member 12 has a flat shape (straight shape) has been described as an example. However, a fin or the like may be formed on the outer wall of the metal member 12. In this case, the surface area of the outer wall of the metal member 12 can be increased to enhance the cooling effect by the cooling medium.

DESCRIPTION OF SYMBOLS 1 Crusher 2 Container 3 Cover member 4 Flow path 5 O-ring 6 Lid 7 Bottom plate 8 Lid fitting 9 Bottom plate fitting 10 Bolt 11 Container body 11a Tube part 11b Bottom part 11c Taper part 12 Metal member 12a Caulking part 12b Collar part 13 Depression 14 Adhesion Agent layer

Claims (6)

A crushing apparatus comprising a container, a covering member that covers the container, and a flow path that is located between the container and the covering member,
It said container includes a container body made of ceramic sintered body, surrounds the outer periphery of the container body is connected to the outer wall of the container body, and a metal member made of aluminum alloy or copper alloy,
The pulverizing apparatus, wherein the metal member is partially cooled from the outside when a part of the metal member comes into contact with a cooling medium flowing through the flow path. The crushing apparatus according to claim 1,
Before Symbol ceramic sintered body, the milling apparatus characterized by consisting mainly of zirconia toughened alumina or silicon carbide. The crushing apparatus according to claim 1,
An adhesive layer interposed between the container body and the metal member;
The pulverizer characterized by the thickness of this adhesive material layer being 1 mm or less . The crushing apparatus according to claim 1,
Before SL container body, while in contact with the metal member, grinding apparatus characterized by being fitted to the metal member. The crushing apparatus according to claim 1,
End of the previous SL metallic member, the milling apparatus characterized by the end face of the container body, are caulked.   A crushing apparatus comprising a container, a covering member that covers the container, and a flow path that is located between the container and the covering member,
  The container includes a container body made of a ceramic sintered body, and a metal member made of an aluminum alloy or a copper alloy that surrounds the outer periphery of the container body and is connected to the outer wall of the container body.
  The stirrer characterized in that the metal member is partially cooled from the outside by contacting a part of the region with a cooling medium flowing through the flow path.

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