WO2020203451A1

WO2020203451A1 - Pulverizer

Info

Publication number: WO2020203451A1
Application number: PCT/JP2020/012948
Authority: WO
Inventors: 勝三角; 尚泉杉本
Original assignee: シャープ株式会社
Priority date: 2019-03-29
Filing date: 2020-03-24
Publication date: 2020-10-08
Also published as: TW202035021A; CN113597341A; JPWO2020203451A1

Abstract

The purpose of the present invention is to minimize accumulation of solid raw material powder on the inner peripheral surface of an outer mortar in the entrance part of a conical mortar. A pulverizing unit is provided with: a pulverizing section which has a conical mortar composed of an inner mortar and an outer mortar, and in which a solid raw material loaded into an entrance part between the inner mortar and the outer mortar, the solid raw material having an oil component, is pulverized in the conical mortar; and an adhesion-preventing protruding member that is provided between the inner mortar and the outer mortar and that rotates.

Description

Crusher

One aspect of the present invention relates to a crusher that crushes a solid raw material such as cacao beans. The present application claims priority based on Japanese Patent Application No. 2019-068931 filed in Japan on March 29, 2019, the contents of which are incorporated herein by reference.

As a crusher of this type, for example, an electric powder grinder disclosed in Patent Document 1 is known. In this electric powder grinder, the material to be crushed is charged and crushed by a charging unit having an opening to be sent to the next stage, a coarse powder grinding unit that roughly crushes the material to be crushed from the introduction adjustment unit, and a coarse powder grinding unit. It is provided with a fine powder grinding unit that further finely crushes the material to be crushed, and an adjusting unit that adjusts the amount of the material to be crushed into the fine powder grinding unit.

Further, in Patent Document 1, the temperature of the introduction region is configured to be lower than the temperature of the oil content of the object to be crushed, and the temperature of the discharge region is configured to be higher than the temperature of the oil content of the object to be crushed. It is designed to prevent the bean powder from sticking to each other.

Japanese publication "Japanese Patent Laid-Open No. 2018-69136" (published on May 10, 2018)

However, the above-mentioned conventional crusher has the following problems. FIG. 12 is a vertical cross-sectional view showing the configuration of a main part of a conventional crusher. The crusher 101 shown in FIG. 12 has a conical mortar 111 including an inner mortar 121 which is a rotary mortar and an outer mortar 122 which is a fixed mortar. A solid raw material to be crushed is introduced from the introduction portion 112 into the inlet portion 123 between the inner mortar 121 and the outer mortar 122. The introduction portion 112 has a cylindrical shape, and the inner diameter of the lower end portion is substantially the same as the inner diameter of the outer mortar 122. The solid raw material is, for example, cacao nibs. Cacao nibs are roasted and coarsely crushed cocoa beans. The cacao beans have an oil content of about 50% and a melting point of about 35 ° C.

In such a crusher 101, when the inner mortar 121 rotates in order to crush the cacao nibs 113, the cocoa nibs 113 are crushed by the inner mortar 121 and the outer mortar 122. In this case, when the cacao nibs 113 are crushed for a long time in the conical mortar 111, the accumulated powder 114 is generated on the inner peripheral surface of the outer mortar 122 at the inlet portion 123, and the crushing efficiency in the conical mortar 111 is lowered. The reason why the deposited powder 114 is generated is that the cacao powder has heat when it is crushed, and the conical mill 111 has heat due to friction during the crushing operation, and these heats dissolve oil from the cacao powder, and the cacao powder enters the inlet. This is because it is deposited on the inner peripheral surface of the outer mill 122 in 123.

One aspect of the present invention is to realize a crusher capable of suppressing the deposition of powder of a solid raw material on the inner peripheral surface of the outer mortar at the inlet of the conical mortar.

In order to solve the above problems, the crusher according to one aspect of the present invention has a conical mortar composed of an inner mortar which is a rotary mortar and an outer mortar which is a fixed mortar, and the inner mortar and the outer mortar A crushing portion for crushing a solid raw material having oil content into the inlet portion between the two with the conical mortar, and an opening at the lower end portion, the diameter of the opening portion of the outer mortar of the inlet portion. It is provided with an introduction portion that is smaller than the inner diameter and that feeds the supplied solid raw material from the opening into the inlet of the conical mortar.

According to one aspect of the present invention, it is possible to suppress the deposition of powder of a solid raw material on the inner peripheral surface of the outer mortar at the inlet of the conical mortar.

It is a perspective view of the crushing apparatus provided with the crushing unit as the crusher of embodiment of this invention. It is a perspective view of the crushing unit shown in FIG. It is an exploded perspective view of the crushing unit shown in FIG. It is a perspective view which includes the vertical cross section of the crushing unit shown in FIG. It is a front view of the vertical cross-sectional portion of the crushing unit shown in FIG. It is explanatory drawing which shows the detailed structure of the crushing unit shown in FIG. 5, and the operation of a crushing unit. It is explanatory drawing which shows the detailed structure of the crushing unit of another embodiment of this invention, and the operation of a crushing unit. It is explanatory drawing which shows the detailed structure of the pulverization unit of still another embodiment of this invention, and the operation of the pulverization unit. It is explanatory drawing which shows the detailed structure of the pulverization unit of still another embodiment of this invention, and the operation of the pulverization unit. It is explanatory drawing which shows the detailed structure of the pulverization unit of still another embodiment of this invention, and the operation of the pulverization unit. It is a top view which shows the positional relationship between the introduction part and the stirring member shown in FIG. It is a vertical cross-sectional view which shows the structure of the main part of the conventional crusher. It is a figure which shows the state of a general trouble which occurs as a result of the accumulation powder of the introduction part shown in FIG. 12, FIG. 13 (a) is a rat hole, FIG. 13 (b) is a bridge, FIG. (C) is a blocking state, and FIG. 13 (d) is a state in which adhesion residue has occurred.

(Overview of crushing solid raw materials)
The crushing of solids such as cereals and beans is used for various foods because the crushing of solids dramatically expands the applications. However, it is also well known that it is difficult to efficiently produce a uniform pulverized product and prevent deterioration of flavor. If crushing efficiency is emphasized, the particles of the crushed product will be coarse and non-uniform, and the smoothness of wheat flour, buckwheat flour, etc. will be lost, and not only the quality of udon and buckwheat will deteriorate, but also extra heat will be applied during crushing. Deterioration of flavor due to oxidation is likely to occur. If extra frictional heat is applied to the crushed material during crushing, the fresh flavor of tea will be impaired and the soymilk will have a strong green odor. The old idea of slowly rotating the mortar to crush the crushed material makes a lot of sense in that it suppresses the generation of frictional heat and thus prevents deterioration of the flavor of the crushed material during processing.

The crushing method, in which the particle size of the crushed material is adjusted by the clearance between the rotating grindstone like a millstone and the fixed grindstone, has the same basic idea even if the material is changed from natural stone to ceramic or metal. is there. This is the same in both dry crushing and wet crushing, which is a typical example in which crushing of buckwheat seeds in buckwheat production is performed by dry method and crushing of soybean in tofu production is performed by wet method. .. Milling by the stone mill method is used in various fields, but it is carried out by adjusting the clearance between the rotary grindstone part and the fixed grindstone part so that the desired particle size can be obtained by one-step crushing regardless of whether it is dry or wet. Has been done. Further, even in a crusher made of a metal such as stainless steel, the clearance between the rotary blade and the fixed blade is designed and implemented so that the crushed product of the desired size can be obtained by one-step crushing. ..

For example, in the case of chocolate, cocoa beans that have been fermented, dried, roasted, and peeled and processed into what is called cocoa nibs are used. When crushing at a store such as a chocolate workshop, the stone mill method may be used, and the clearance between the stone mills is adjusted step by step. Grinding should be repeated multiple times with a gradual reduction in clearance until the desired smooth chocolate is obtained. The size of a single grain of cacao, which is the raw material, is relatively large and disadvantageous for clearance. That is, since cacao is gradually finely crushed, it takes time to obtain the desired particles.

For crushing cacao, wet crushing is adopted by utilizing the fact that the melting point of cacao is about 35 ° C and it becomes a liquid (paste) due to the frictional heat between the mortar and cacao nibs during crushing cacao nibs. The temperatures of cacao and mortar during crushing are determined by the circumstances and have not been controlled in the past. If the temperature is low, the cacao cannot flow in the mortar and sticks to the groove, cannot be crushed, and the load on the motor increases. On the other hand, if the temperature is too high, the cocoa may be scorched, degrading the quality of the cocoa.

[Embodiment 1]
Hereinafter, one embodiment of the present invention will be described in detail. FIG. 1 is a perspective view of a crushing device 1 including a crushing unit 11 as the crusher of the present embodiment. FIG. 2 is a perspective view of the crushing unit 11 shown in FIG. FIG. 3 is an exploded perspective view of the crushing unit 11 shown in FIG. FIG. 4 is a perspective view including a vertical cross section of the crushing unit 11 shown in FIG. FIG. 5 is a front view of a vertical cross-sectional portion of the crushing unit 11 shown in FIG.

(Outline of crusher 1)
As shown in FIG. 1, the crushing device 1 includes a crushing unit 11, a heat insulating container 12, a hopper 13, a motor 14, and a powder take-out lever 15.

The crushing unit 11 is housed inside the heat insulating container 12, and the hopper 13 is mounted on the crushing unit 11. The hopper 13 accommodates a solid material. In this embodiment, the case where the solid raw material is cacao nibs will be described. The motor 14 is provided below the crushing device 1 and rotates the crushing portion 26 of the crushing unit 11. The powder take-out lever 15 is located on the side of the crushing device 1. By rotating the powder take-out lever 15 downward, the cacao nibs powder (cacao powder) crushed by the crushing unit 11 can be taken out from the take-out port 16.

(Structure of crushing unit 11)
As shown in FIGS. 2 to 5, the crushing unit 11 has a housing portion 21 at the upper portion and a collection / transport portion 22 at the lower portion. The housing portion 21 has a handle 23 used when the crushing unit 11 is taken in and out of the inside of the heat insulating container 12. Inside the housing portion 21, a hopper receiving portion 24, an introduction portion 25, and a crushing portion 26 are provided from top to bottom.

The hopper receiving portion 24 receives the hopper 13 arranged on the crushing unit 11. The hopper receiving portion 24 has an opening at the lower end portion. The hopper 13 houses the cacao nibs, and the introduction unit 25 receives the cacao nibs supplied from the hopper 13 via the hopper receiving unit 24. The introduction portion 25 has an opening 25a at the lower end portion.

The crushing portion 26 has a conical mortar 27 in the central portion and a flat mortar 28 around the conical mortar 27. The conical mortar 27 includes an inner mortar 29 which is a rotary mortar and an outer mortar 30 which is a fixed mortar. The outer mortar 30 has a cylindrical shape, and the inner mortar 29 is inserted into the outer mortar 30 and has a shape in which the outer diameter gradually decreases from the lower part to the upper part. The inside of the outer mortar 30 at the upper end of the conical mortar 27 is the inlet portion 33 of the cacao nibs. The conical mortar 27 crushes the cacao nibs 45 (see FIG. 6, solid raw material) charged from the introduction unit 25 into coarse cacao powder.

The flat mortar 28 is composed of a lower mortar 31 which is a rotary mortar and an upper mortar 32 which is a fixed mortar. The lower mortar 31 is fixed to the outer peripheral portion of the inner mortar 29 and is integrated with the inner mortar 29. The upper mortar 32 is fixed to the outer peripheral portion of the outer mortar 30 and is integrated with the outer mortar 30. A central shaft 37 is provided at the center of the inner mortar 29 and the lower mortar 31. The flat mortar 28 grinds the coarse cacao powder formed by the conical mortar 27 into fine cacao powder.

The recovery transport unit 22 has a material receiving unit 34 at the upper portion, a transport passage 35 connected to the material receiving unit 34, and a drive transmission unit 36 under the material receiving unit 34. A crushing portion 26 is arranged on the material receiving portion 34, and the material receiving portion 34 receives the cacao powder formed by the crushing portion 26. The transport passage 35 transports the cacao powder received by the material receiving unit 34 downward. The drive transmission unit 36 transmits the driving force of the motor 14 to the central shaft 37 of the crushing unit 26 mounted on the material receiving unit 34, and rotates the crushing unit 26 (inner mill 29 and lower mill 31).

Note that FIGS. 4 and 5 show a state in which the inner mortar 29 of the conical mortar 27 is provided with the adhesion prevention / stirring member 44 described with reference to FIG.

(Detailed configuration, operation and advantages of the crushing unit 11)
FIG. 6 is an explanatory diagram showing a detailed configuration of the crushing unit 11 shown in FIG. 5 and an operation of the crushing unit 11.

As shown in FIG. 6, the crushing unit 11 includes a rotating anti-adhesion protrusion member 41 between the inner mortar 29 and the outer mortar 30 of the conical mortar 27. The adhesion prevention protrusion member 41 is bent diagonally downward so that one end side portion is fixed to the upper surface of the inner mortar 29 with a screw and the other end side portion is inserted between the inner mortar 29 and the outer mortar 30. ing. The other end side portion of the adhesion prevention protrusion member 41 scrapes off the accumulated powder 42 generated on the inner peripheral surface of the outer mortar 30. As a result, in the crushing unit 11, it is possible to suppress a decrease in crushing efficiency in the conical mortar 27 due to the formation of the deposited powder 42 in the conical mortar 27.

The adhesion prevention protrusion member 41 is provided on the inner mortar 29 and is not limited to a configuration in which the inner mortar 29 rotates together, and may be configured to be driven by another mechanism to rotate.

Further, in the crushing unit 11, more specifically, the conical mortar 27 has a coarse crushing region 27a at the upper portion and a fine crushing region 27b at the lower portion, and the other end portion of the adhesion prevention protrusion member 41 is roughly crushed. It protrudes between the outer mortar 30 and the inner mortar 29 in the region 27a. In the conical mortar 27, the coarse crushed region 27a has a large gap between the outer mortar 30 and the inner mortar 29, the fine crushed region 27b has a small gap between the outer mortar 30 and the inner mortar 29, and the deposited powder 42 is coarse. It tends to occur on the inner peripheral surface of the outer mortar 30 of the crushing region 27a. Therefore, by projecting the other end of the adhesion prevention protrusion member 41 between the outer mortar 30 and the inner mortar 29 of the coarse crushing region 27a, the generation of the deposited powder 42 can be appropriately suppressed.

Further, in the crushing unit 11, the diameter of the opening 25a of the introduction portion 25 is smaller than the inner diameter of the outer mortar 30 of the inlet portion 33 of the conical mortar 27. At the inlet 33 of the conical mortar 27, the rotational force of the inner mortar 29 propagates between the cocoa nibs 45, and the cocoa nibs 45 of the introduction portion 25 are also moved. However, according to the above configuration, the cocoa nibs 45 are charged into the inlet 33 of the conical mortar 27. The cocoa nibs 45 and the cocoa powder formed by crushing the cocoa nibs 45 rotate in a small area in the inlet 33 of the conical mortar 27 under the introduction portion 25, and it becomes difficult for the cocoa nibs 45 to flow back to the introduction portion 25. The range in which the force is propagated can also be suppressed. This is because the lower surface of the introduction portion 25 becomes a so-called barb, and the backflow of the cacao nibs 45 and the cacao powder to the introduction portion 25 is suppressed. Further, the rubbing between the cacao nibs 45 can be reduced, and the generation of cacao powder at the introduction portion 25 can be suppressed. As a result, the accumulation of cacao powder (powder of solid raw material) in the introduction unit 25 (deposited powder 114 shown in FIG. 12) is suppressed, and the cacao nibs 45 are smoothly charged from the introduction unit 25 to the conical mortar 27. Can be done. Further, in the conical mortar 27, the backflow of the charged cacao nibs 45 to the introduction portion 25 is suppressed on the lower surface of the introduction portion 25, and the charged cacao nibs 45 can be efficiently crushed.

Here, in the crusher 101 shown in FIG. 12, the reason why the deposited powder 114 is generated on the inner peripheral surface of the introduction portion 112 will be described. When the cacao nibs 113 exceeding the crushing capacity of the conical mortar 111 are charged into the inlet portion 123, the cocoa nibs 113 that cannot fit inside the conical mortar 111 and the cocoa powder formed by crushing the cocoa nibs 113 with the conical mortar 111 , As shown by an arrow in FIG. 12, the backflow flows from the inlet portion 123 of the conical mortar 111 to the introduction portion 112. Further, the cacao powder has heat when it is crushed, the conical mortar 111 has heat due to friction during the crushing operation, and the heat of the conical mortar 111 is transferred to the introduction portion 112. Therefore, the oil is dissolved from the cacao powder, and the cacao powder is deposited on the inner surface of the introduction portion 112 (deposited powder 114 in FIG. 12). As a result, the cacao nibs 113 cannot be smoothly supplied from the introduction unit 112 to the conical mortar 111.

FIG. 13 shows a general trouble state resulting from an increase in the deposited powder 114 shown in FIG. FIG. 13A shows a rat hole, FIG. 13B shows a bridge, FIG. 13C shows a blocking state, and FIG. 13D shows a state in which adhesion remains.

Further, in the crushing unit 11 of the present embodiment, the inner diameter of the introduction portion 25 gradually decreases from the upper portion toward the opening portion 25a. That is, the inner surface of the introduction portion 25 is an inclined surface whose diameter gradually decreases from the upper portion toward the opening 25a. The cacao nibs 45 receive the rotational force propagated from the inlet 33 of the conical mortar 27, and rotate (turn) also at the introduction portion 25 near the opening 25a. Due to this rotation, a force that tends to move in the centrifugal (outward) direction acts on the cacao nibs 45, the cacao nibs 45 and the cacao powder are pressed against the inner surface of the introduction portion 25, and the cacao powder is deposited so as to be gradually compacted. Become. Therefore, when the introduction portion 25 is provided with an inclined surface, the cacao powder can move upward and pass the force of pushing against the inner surface of the introduction portion 25. As a result, even when the cacao powder is returned from the conical mortar 27 to the introduction portion 25, the cacao powder easily moves upward along the slope of the introduction portion 25, and is near the opening 25a of the introduction portion 25. It becomes difficult to accumulate in one place.

The inclination angle of the inner surface of the introduction portion 25 with respect to the horizontal plane is preferably 45 ° <θ <75 °, where θ is the inclination angle. If the inclination angle θ is 45 ° or less, the diameter of the introduction portion 25 becomes too large, and cacao nibs may remain on the slope. On the other hand, when the inclination angle θ is 75 ° or more, the effect of releasing the force for compacting the cacao powder acting in the centrifugal direction due to rotation is small. Therefore, the cacao powder returned from the conical mortar 27 to the introduction portion 25 is difficult to move above the introduction portion 25, and easily accumulates in the vicinity of the opening 25a.

The relationship between the inner diameter of the outer mortar 30 of the inlet 33 of the conical mortar 27 and the diameter of the opening 25a of the introduction portion 25 is that the inner diameter of the outer mortar 30 of the inlet 33 is D1 and the diameter of the opening 25a of the introduction portion 25. When d1, it is preferable that 0.5 <d1 / D1 <0.8.

Regarding the relationship between the gap between the lower surface of the introduction portion 25 and the upper surface of the inner mortar 29 and the outer diameter of the upper end portion of the inner mortar 29, the gap between the lower surface of the introduction portion 25 and the upper surface of the inner mortar 29 is the gap h1 and the inner mortar 29. When the outer diameter of the upper end portion of the above is D2, it is preferable that 0.5 <2h1 / (D1-D2) <1.

When 2h1 / (D1-D2) is 0.5 or less, it becomes difficult for cacao nibs 45 to enter between the inner mortar 29 and the outer mortar 30 of the conical mortar 27. On the other hand, if 2h1 / (D1-D2) is 1 or more, the cacao nibs 45 thrown into the inlet portion 33 from the introduction portion 25 are likely to return to the introduction portion 25.

[Embodiment 2]
Other embodiments of the present invention will be described below. For convenience of explanation, the same reference numerals will be added to the members having the same functions as the members described in the above embodiment, and the description will not be repeated.

(Detailed configuration, operation and advantages of the crushing unit 26)
FIG. 7 is an explanatory diagram showing a detailed configuration of the crushing unit 11 of the present embodiment and the operation of the crushing unit 11. FIG. 8 is a perspective view showing a state in which the adhesion prevention / stirring member 44 of the conical mortar 27 is attached to the inner mortar 29.

As shown in FIG. 7, the crushing unit 11 of the present embodiment includes a rotating rod-shaped stirring member 43 provided in the moving path of the cacao nibs 45 leading to the introduction portion 25. In the present embodiment, the stirring member 43 is connected to one end of the adhesion prevention protrusion member 41, and is configured as a part of the adhesion prevention / stirring member 44 having the adhesion prevention protrusion member 41 and the stirring member 43.

The stirring member 43 is inserted into the inside of the introduction portion 25 through the opening 25a of the introduction portion 25 and reaches the lower part of the hopper receiving portion 24. Since the stirring member 43 is provided on the inner mortar 29, it rotates together with the inner mortar 29. As a result, it is possible to prevent the cacao nibs 45 from staying in the movement path of the cacao nibs 45 leading to the introduction unit 25, and to smoothly feed the cacao nibs 45 into the conical mortar 27 via the introduction unit 25. (Effect of claim 3)
The stirring member 43 is not limited to the configuration provided as a part of the adhesion prevention / stirring member 44, and may be provided independently. Further, the stirring member 43 is not limited to the configuration provided in the inner mortar 29 and rotating together with the inner mortar 29, and may be configured to be driven by another mechanism to rotate.

[Embodiment 3]
Still other embodiments of the present invention will be described below. For convenience of explanation, the same reference numerals will be added to the members having the same functions as the members described in the above embodiment, and the description will not be repeated. FIG. 9 is an explanatory diagram showing a detailed configuration of the crushing unit 11 of the present embodiment and the operation of the crushing unit 11.

As shown in FIG. 9, the crushing unit 11 of the present embodiment includes an introduction unit 51 instead of the introduction unit 25 shown in FIG. The introduction portion 51 has a cylindrical shape, and the deposited powder 42 is more likely to be generated on the inner peripheral portion as compared with the introduction portion 25. However, since the adhesion prevention protrusion member 41 suppresses the generation of the accumulated powder 42 on the inner peripheral surface of the outer mortar 30, it becomes difficult to put the cacao nibs 45 from the introduction portion 51 into the conical mortar 27 as a whole. It can be suppressed.

[Embodiment 4]
Still other embodiments of the present invention will be described below. For convenience of explanation, the same reference numerals will be added to the members having the same functions as the members described in the above embodiment, and the description will not be repeated. FIG. 10 is an explanatory diagram showing a detailed configuration of the crushing unit 11 of the present embodiment and the operation of the crushing unit 11. FIG. 11 is a plan view showing the positional relationship between the introduction portion 51 and the stirring member 43 shown in FIG.

As shown in FIG. 10, the crushing unit 11 of the present embodiment includes an introduction unit 51 instead of the introduction unit 25 shown in FIG. 7. The introduction portion 51 has a cylindrical shape, and the deposited powder 42 is more likely to be generated on the inner peripheral portion as compared with the introduction portion 25. However, since the adhesion prevention protrusion member 41 suppresses the generation of the accumulated powder 42 on the inner peripheral surface of the outer mortar 30, it becomes difficult to put the cacao nibs 45 from the introduction portion 51 into the conical mortar 27 as a whole. It can be suppressed.

Further, in the crushing unit 11 of the present embodiment, the gap between the inner surface of the introduction portion 51 and the stirring member 43 of the adhesion prevention / stirring member 44 is t, the inner diameter of the outer mill 30 of the inlet portion 33 is D1, and the inner diameter of the introduction portion 51. Is D2, and it is preferable that 1 <2t / (D1-D2) <1.5.

With such a relationship, the introduction portion 51 bites the cacao nibs 45 between the stirring member 43 and the inner peripheral surface of the introduction portion 51 to crush the cacao nibs 45, and the inner peripheral surface of the introduction portion 51 becomes muddy by heat. It is possible to suppress a situation in which a piled portion 46 of the cacao nibs 45 is formed, and the introduced portion 51 is easily clogged by the deposited portion 46.

[Summary]
The crusher according to the first aspect of the present invention has a conical mortar composed of an inner mortar which is a rotary mortar and an outer mortar which is a fixed mortar, and is inserted into an inlet portion between the inner mortar and the outer mortar. It is provided with a crushing portion for crushing a solid raw material having an oil content with the conical mortar, and an adhesion prevention protrusion member provided between the outer mortar and the inner mortar and rotating.

In the crusher according to the second aspect of the present invention, in the first aspect, the conical mortar has a coarse crushing region at an upper portion and a fine crushing region at a lower portion, and the adhesion prevention protrusion member has one end thereof. It may be fixed to the inner mortar and the other end portion may protrude between the outer mortar and the inner mortar in the coarse crushing region.

The crusher according to the third aspect of the present invention has an opening at the lower end in the first or second aspect, and the solid raw material supplied to the inside is charged from the opening into the inlet of the conical mortar. A structure may be configured in which a lower end portion is fixed to the upper end portion of the inner mortar and a rod-shaped stirring member inserted from the opening portion into the inside of the introduction portion is provided.

In the crusher according to the fourth aspect of the present invention, in the third aspect, the gap between the inner surface of the introduction portion and the stirring member is t, the inner diameter of the outer mill of the inlet portion is D1, and the inner diameter of the introduction portion is D2. Then, 1 <2t / (D1-D2) <1.5 may be established.

In the above aspect 4, the crusher according to the fifth aspect of the present invention may have a standing structure in which the inner diameter of the introduction portion gradually decreases from the upper part toward the opening.

Claims

The conical mortar has a conical mortar composed of an inner mortar which is a rotary mortar and an outer mortar which is a fixed mortar, and a solid raw material having an oil content which is charged into the inlet portion between the inner mortar and the outer mortar is used as the conical mortar. And the crushing part to crush
A crusher provided between the outer mortar and the inner mortar and provided with a rotating adhesion prevention protrusion member.
The conical mortar has a coarse crushed region at the top and a fine crushed region at the bottom.
The first aspect of the anti-adhesion protrusion member is characterized in that one end thereof is fixed to the inner mortar and the other end protrudes between the outer mortar and the inner mortar in the coarsely crushed region. Crusher.
An introduction portion having an opening at the lower end and feeding the solid raw material supplied to the inside from the opening into the inlet of the conical mortar.
The pulverization according to claim 1 or 2, wherein a lower end portion is fixed to an upper end portion of the inner mortar, and a rod-shaped stirring member inserted from the opening portion into the inside of the introduction portion is provided. Machine.
Assuming that the gap between the inner surface of the introduction portion and the stirring member is t, the inner diameter of the outer mill of the inlet portion is D1, and the inner diameter of the introduction portion is D2.
1 <2t / (D1-D2) <1.5
The crusher according to claim 3, wherein the above is satisfied.
The crusher according to claim 4, wherein the inner diameter of the introduction portion gradually decreases from the upper portion toward the opening.