JP2024006510A - Manufacturing method and manufacturing device of excrement treatment material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing method and a manufacturing device of an excrement treatment material suitable to obtain a granular material with a large particle diameter while avoiding insufficient strength of a core part.

SOLUTION: A manufacturing device is the device of manufacturing an excrement treatment material made of a granular material for treating excrements and includes a granulator. The granulator includes an extrusion granulator which forms a granulation object constituting the granular material by performing extrusion granulation of a granulation material. The granulator includes a die 12. The die 12 includes a plurality of through holes 13 through which the granulation material passes. The plurality of through holes 13 includes a through hole 13a having an inlet 14a and a through hole 13b having an inlet 14b. The through hole 13a and the through hole 13b have a common outlet 15.

SELECTED DRAWING: Figure 8

COPYRIGHT: (C)2024,JPO&INPIT

Description

The present invention relates to a method and apparatus for manufacturing excrement disposal materials.

As a conventional excrement disposal material, there is one described in Patent Document 1, for example. The excrement disposal material described in this document is an excrement disposal material used for disposal of animal or human excrement, and is composed of a plurality of water-absorbing granules. The granular core that constitutes each granule is formed using a granulator. As the granulator, an extrusion granulator having a die provided with a plurality of through holes through which the granulating material (material constituting the core) passes is generally used.

JP2017-192320A

When forming the core using an extrusion granulator, the diameter of the core is defined by the diameter of the outlet of the through hole of the die. Therefore, by increasing the diameter of the outlet of the through hole, it is possible to obtain a granular material having a large particle size. However, when the diameter of the through hole is increased, the pressure applied to the granulated material passing through the through hole is reduced. If the pressure is insufficient, the core will tend to collapse due to lack of strength. This has been a factor that makes it difficult to obtain granules with large particle sizes in the production of excrement treatment materials.

The present invention has been made in view of the above-mentioned problems, and provides a method and apparatus for producing an excrement disposal material suitable for obtaining granules with a large particle size while avoiding insufficient strength of the core part. The purpose is to

The method for producing an excrement disposal material according to the present invention is a method for producing an excrement disposal material made of granular bodies for treating excrement, and the method includes extrusion granulation of granulation material using an extrusion granulator. The extrusion granulator includes a granulation step of forming a granulated material constituting the granular material, and the extrusion granulator has a die provided with a plurality of through holes through which the granulation material passes. The through hole includes a first through hole having a first inlet, and a second through hole having a second inlet spaced apart from the first inlet, and the first through hole has a second through hole having a second inlet spaced apart from the first inlet. The holes are characterized by having a common outlet.

In this manufacturing method, an extrusion granulator having a die is used. The die is provided with a plurality of through holes including first and second through holes. The first and second through holes each have first and second inlets spaced apart from each other. That is, the first and second through holes have separate entrances. On the other hand, the first and second through holes have a common outlet. Therefore, even if the diameter of the common outlet is increased, if the diameter of the individual inlets is not increased, it is possible to suppress a decrease in the pressure applied to the granulated material passing through the first and second through holes. .

Moreover, the apparatus for producing an excrement disposal material according to the present invention is an apparatus for producing an excrement disposal material made of granules for disposing excrement, and is provided with a plurality of through holes through which the granulated material passes. an extrusion granulator having a die, the extrusion granulator forming a granulated material constituting the granular body by extrusion granulating the granulated material, the plurality of through holes having a first inlet; a second through hole having a first through hole and a second inlet spaced apart from the first inlet, the first and second through holes having a common outlet; shall be.

This manufacturing device is equipped with an extrusion granulator having a die. The die is provided with a plurality of through holes including first and second through holes. The first and second through holes each have first and second inlets spaced apart from each other. That is, the first and second through holes have separate entrances. On the other hand, the first and second through holes have a common outlet. Therefore, even if the diameter of the common outlet is increased, if the diameter of the individual inlets is not increased, it is possible to suppress a decrease in the pressure applied to the granulated material passing through the first and second through holes. .

According to the present invention, a method and apparatus for producing an excrement disposal material suitable for obtaining granules with a large particle size while avoiding insufficient strength of the core portion can be realized.

1 is a schematic diagram showing one embodiment of an excrement disposal material according to the present invention. FIG. 3 is a perspective view showing a granular body 30. FIG. 3 is a sectional view taken along line III-III in FIG. 2. FIG. BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram which shows one embodiment of the manufacturing apparatus of the excrement disposal material by this invention. 1 is a plan view showing a granulator 10. FIG. FIG. 2 is a bottom view showing the granulator 10. FIG. 6 is an end view taken along line VII-VII in FIG. 5. FIG. FIG. 3 is an enlarged view showing a part of the die 12. FIG. FIG. 2 is a diagram for explaining the structure of a coating machine 20. FIG. It is a figure for explaining the granulation process in one embodiment of the manufacturing method of the excrement treatment material by this invention. It is a figure for explaining the granulation process in one embodiment of the manufacturing method of the excrement treatment material by this invention.

Embodiments of the present invention will be described in detail below with reference to the drawings. In addition, in the description of the drawings, the same elements are given the same reference numerals and redundant description will be omitted.

FIG. 1 is a schematic diagram showing one embodiment of the excrement disposal material according to the present invention. The excrement disposal material 6 is an excrement disposal material used to dispose of excrement (mainly urine). The excrement disposal material 6 may be an animal excrement disposal material used to dispose of the excrement of animals such as cats and dogs, or a human excrement disposal material used to dispose of human excrement. It may be wood. The excrement treatment material 6 is composed of a plurality of granules 30 for treating excrement. The excrement disposal material 6 is used, for example, in a state in which a plurality of granules 30 are placed in a box-shaped toilet.

Each granular body 30 has water absorbency. That is, each granular body 30 takes in and retains excrement therein. In order for the granular material 30 to have water absorption properties, it is necessary that the liquid passage rate measured by the following test be less than 60%. First, a granular material 30 (sample) equivalent to 50 g is put into a sieve having an inner diameter of 10 cm and an opening of 1 mm. Place an empty beaker under the sieve. Then, 30 ml of water is dropped onto the sample over 10 seconds using a syringe (60 ml syringe manufactured by Terumo Corporation) with an outer cylinder having an inner diameter of 3 cm and a tip having an inner diameter of 4 mm. After leaving it for 1 minute, measure the amount of water in the beaker. The ratio of the measured amount of water to the amount of dropped water (30 ml) is defined as the liquid passage rate. That is, if the amount of water in the beaker is less than 18 ml, the liquid passage rate will be less than 60%, so it can be said that the granular material 30 has water absorbency.

Each granule 30 has a columnar shape. In this embodiment, each granule 30 has a substantially cylindrical shape. The particle size of each granule 30 is, for example, 10 mm or more and 30 mm or less. Here, the particle size of the granular material 30 is defined as the diameter of a cylinder (minimum cylinder) having the smallest diameter among the cylinders that can contain the granular material 30. However, the central axis of the smallest cylinder is parallel to the central axis of the granular body 30. When the granular body 30 has a cylindrical shape, the particle size of the granular body 30 is equal to its diameter. It is preferable that each granular body 30 is mainly made of organic matter. Here, the main material of the granules 30 refers to the material that accounts for the largest weight percentage in the granules 30 among the one or more materials that constitute the granules 30. Each granular body 30 may be made of only organic matter, or may be made of both organic matter and inorganic matter.

FIG. 2 is a perspective view showing the granular material 30. As shown in FIG. Further, FIG. 3 is a cross-sectional view taken along the line III--III in FIG. 2. The granular material 30 has a core portion 32 (granulated material) and a covering portion 34 . The core portion 32 is a granulated material formed into a substantially cylindrical shape. The core portion 32 has the function of absorbing and retaining urine. The core portion 32 contains a water-absorbing material. The core portion 32 is mainly made of a water-absorbing material. Here, the main material of the core 32 refers to the material that accounts for the largest proportion of the weight of the core 32 among the one or more materials that make up the core 32 .

The core portion 32 may be made of only a water-absorbing material, or may be made of a water-absorbing material and other materials. Preferably, the water-absorbing material is organic. Examples of the organic water-absorbing material include papers, plants, plastics, and organic sludge. Paper refers to materials mainly made of pulp. Examples of the paper include ordinary paper (paper powder), classified PVC wallpaper (paper obtained by classifying PVC wallpaper), and fluff pulp. Examples of plants include wood flour, sawdust, and plant residues (tea leaves, okara, etc.). Examples of plastics include ordinary plastics as well as classified paper diapers (plastics obtained by classifying paper diapers). Examples of organic sludges include papermaking sludge and pulp sludge.

The core portion 32 may or may not contain an adhesive material. Examples of adhesive materials include water-absorbing polymers, starch, CMC (carboxymethylcellulose), PVA (polyvinyl alcohol), or dextrin. As the water-absorbing polymer, for example, an acrylic water-absorbing polymer such as sodium polyacrylate can be used.

The covering portion 34 covers the core portion 32. The covering portion 34 may cover the entire periphery of each core portion 32, or may cover only a portion of the periphery of each core portion 32. The covering part 34 has a function of adhering the granules 30 that have absorbed excrement to each other and forming a mass during use. The covering portion 34 is also mainly made of a water-absorbing material. Here, the main material of the covering part 34 refers to the material that accounts for the largest weight percentage in the covering part 34 among the one or more materials that constitute the covering part 34. The water-absorbing material contained in the covering portion 34 is also preferably an organic material. The covering portion 34 contains an adhesive material.

FIG. 4 is a configuration diagram showing an embodiment of an excrement disposal material manufacturing apparatus according to the present invention. The manufacturing apparatus 1 is an apparatus for manufacturing the above-mentioned excrement treatment material 6, and includes a granulator 10 and a coating machine 20.

5 and 6 are a plan view and a bottom view showing the granulator 10, respectively. Further, FIG. 7 is an end view taken along line VII-VII in FIG. 5. The granulator 10 is an extrusion granulator that forms granules (core 32) forming each granule 30 by extruding and granulating a granulating material (material forming the core 32). .

The granulator 10 has a die 12, a roller 16, and a cutter 18. The dice 12 are circular in plan view. The thickness of the die 12 is uniform. The die 12 is provided with a plurality of through holes 13 through which the granulated material passes. Note that in the following description, "a plurality of through holes 13" refers to all the through holes 13 provided in the die 12 unless otherwise specified. The plurality of through holes 13 are scattered over substantially the entire surface of the die 12.

As shown in FIG. 5, a roller 16 is provided on the surface side of the die 12 (on the entrance side of the through hole 13). The roller 16 has a cylindrical shape, and its central axis extends in the radial direction of the die 12. In this embodiment, a plurality of (specifically four) rollers 16 are provided. One end of each roller 16 is connected to a rotating shaft 17 located at the center of the surface of the die 12. The center axis of the rotating shaft 17 coincides with the center axis of the die 12. Here, the central axis of the die 12 refers to a virtual straight line passing through the center of the die 12 in a plan view and extending in the thickness direction of the die 12. The rotating shaft 17 is configured to rotate (rotate) around its central axis. Each roller 16 rotates (rotates) around the central axis of the die 12 together with the rotating shaft 17 (revolutions). In this way, the roller 16 pushes the granulated material into each through hole 13 while revolving around the central axis of the die 12 . The roller 16 can pass over the entrances of all the through holes 13 provided in the die 12.

As shown in FIG. 6, a cutter 18 is provided on the back side of the die 12 (on the exit side of the through hole 13). The cutter 18 extends in the radial direction of the die 12 from the center of the back surface of the die 12. The cutter 18 cuts the granulated material extruded from each through hole 13 while rotating along the back surface of the die 12 . Specifically, the cutter 18 rotates around the central axis of the die 12 in a plane parallel to the back surface of the die 12. Note that the cutter 18 is configured to be able to rotate independently of the roller 16 described above. The cutter 18 can pass over the exits of all the through holes 13 provided in the die 12.

As shown in FIGS. 7 and 8, the plurality of through holes include a through hole 13a (first through hole) and a through hole 13b (second through hole). FIG. 8 is an enlarged view showing a part of the die 12 in FIG. 7 (the part including the pair of through holes 13a and 13b). The through hole 13a and the through hole 13b each have an inlet 14a (first inlet) and an inlet 14b (second inlet). The inlet 14a is an opening of the through hole 13a on the surface of the die 12. Similarly, the inlet 14b is the opening of the through hole 13b on the surface of the die 12. Inlet 14b is spaced apart from inlet 14a. Regarding the pair of through holes 13a and 13b, the inlet 14a and the inlet 14b are lined up in the radial direction of the die 12 (see FIG. 5). The inlet 14a is arranged radially inner than the inlet 14b. The through hole 13a and the through hole 13b have a common outlet 15. The outlet 15 is an opening of the through holes 13a and 13b on the back surface of the die 12. In this embodiment, the inlet 14a, the inlet 14b, and the outlet 15 are circular.

The diameter d1 of the inlet 14a and the diameter d2 of the inlet 14b are both smaller than the diameter d3 of the outlet 15. Here, the diameter d1 and the diameter d2 are defined as the diameters of the smallest circle that can contain the inlet 14a and the inlet 14b, respectively. Similarly, the diameter d3 is defined as the diameter of the smallest circle that can contain the outlet 15. The diameter d1 and the diameter d2 are equal to each other. The sum of the opening areas of the inlet 14a and the inlet 14b is preferably larger than the opening area of the outlet 15.

The die 12 has a merging portion P1. The merging portion P1 is a portion where the granulated material entering from the inlet 14a and the granulating material entering from the inlet 14b merge. The merging portion P1 exists between the front surface and the back surface of the die 12. That is, the merging portion P1 exists at a position spaced apart from both the front and back surfaces of the dice 12. As a result, the through-hole 13a and the through-hole 13b merge with each other in the middle of the path (merging portion P1) from the entrance (inlets 14a, 14b) to the exit 15. In the thickness direction of the die 12 (vertical direction in FIG. 8), the distance d4 from the merging portion P1 to the front surface of the die 12 is greater than or equal to the distance d5 from the merging portion P1 to the back surface of the die 12. The distance d4 is preferably 2/3 or more and 4/5 or less of the thickness d6 of the die 12.

In plan view, the center of the exit 15 overlaps the confluence P1. That is, when viewed from the thickness direction of the die 12, the center of the outlet 15 overlaps the merging portion P1. The through hole 13a extends obliquely with respect to the thickness direction of the die 12 in a section from the inlet 14a to the merging portion P1. Similarly, the through hole 13b extends obliquely to the thickness direction of the die 12 in the section from the inlet 14b to the merging portion P1. In plan view, the midpoint of the line segment connecting the center of the entrance 14a and the center of the entrance 14b overlaps the merging portion P1.

The plurality of through holes 13 consist of n pairs (n is an integer) of through holes 13a and 13b. That is, the plurality of through holes 13 include n through holes 13a and n through holes 13b. This means that all the through holes 13 are combined with other through holes 13. As a result, the number of inlets (2n) of the plurality of through holes 13 is twice the number of outlets (n).

Returning to FIG. 4, the coating machine 20 coats each granulated material (core part 32) formed by the granulator 10 with powdered coating material (material constituting the coating part 34). . The coating machine 20 has a drum 22 (container), as shown in FIG. The drum 22 has a substantially cylindrical shape and is rotatably provided. Specifically, the drum 22 is rotatable around its central axis. The central axis of the drum 22 is horizontal. A core portion 32 formed by the granulator 10 is housed in the drum 22 . The coating machine 20 attaches the coating material around each core 32 while rotating the drum 22 in which the core 32 is housed.

Next, an embodiment of the method for manufacturing an excrement disposal material according to the present invention will be described along with the operation of the manufacturing apparatus 1. This manufacturing method includes a granulation step and a coating step. The granulation process is a process of forming the core portion 32 by extruding and granulating the granulation material using the granulator 10. It is preferable that the granulation material has an organic substance as a main material. Note that, prior to granulation, the granulation material is subjected to pretreatments such as crushing, kneading, and adding water as necessary.

In the granulation process, as shown in FIG. 10, the granulated material M1 supplied to the surface side of the die 12 is moved through each through hole 13a, 13b. As shown in FIG. 11, the granulated material M1 that entered from the entrance 14a of the through hole 13a and the granulated material M1 that entered from the entrance 14b of the through hole 13b merge at the merging portion P1, and then flow to the back side of the die 12. being pushed out. When the granulated material M1 is extruded, a cutter 18 (not shown) continues to rotate on the back side of the die 12. As a result, the granulated material M1 coming out from the exits 15 of the through holes 13a and 13b is cut by the cutter 18. The thus cut portion becomes the granulated material (core portion 32).

The coating step is a step of covering each granule formed in the granulation step with a coating material. In the coating step, after the core portions 32 formed in the granulation step are housed in the drum 22 (see FIG. 9), a coating material is applied around each core portion 32 while rotating the drum 22. It is preferable that the coating material is mainly made of organic matter. The coating material can be applied, for example, by scattering or spraying. As a result, the covering portion 34 is formed. Thereafter, post-treatments such as sieving and drying are performed as necessary. Through the above steps, the excrement treatment material 6 made of a plurality of granules 30 is obtained.

The effects of this embodiment will be explained. In this embodiment, a granulator 10 having a die 12 is used. The die 12 is provided with a plurality of through holes 13 including a through hole 13a and a through hole 13b. The through hole 13a and the through hole 13b each have an inlet 14a and an inlet 14b spaced apart from each other. That is, the through hole 13a and the through hole 13b have separate entrances (inlets 14a, 14b). On the other hand, the through hole 13a and the through hole 13b have a common outlet 15. Therefore, even if the diameter of the common outlet 15 is increased, unless the diameters of the individual inlets 14a and 14b are increased, a decrease in the pressure applied to the granulated material passing through the through holes 13a and 13b will be suppressed. be able to. Therefore, a manufacturing method and manufacturing apparatus 1 for the excrement disposal material 6 suitable for obtaining granules 30 having a large particle size while avoiding insufficient strength of the core portion 32 are realized.

When the excrement disposal material 6 is an animal excrement disposal material, increasing the particle size of the granules 30 has the advantage that the granules 30 are less likely to get caught in or adhere to the animal's legs. This makes it possible to prevent the particulate matter 30 from being scattered around the toilet after defecation.

The diameters of the inlet 14a and the inlet 14b are both smaller than the diameter of the outlet 15. By reducing the diameter of each inlet 14a, 14b in this way, sufficient pressure can be applied to the granulated material before merging (the granulated material passing through the section from each inlet 14a, 14b to the merging part P1). It becomes easier.

When the sum of the opening areas of the inlet 14a and the inlet 14b is larger than the opening area of the outlet 15, the density of the granulated material after merging (the granulated material passing through the section from the merging portion P1 to the outlet 15) becomes high. For this reason, it becomes easy to apply sufficient pressure to the granulated material after joining.

In the thickness direction of the die 12, the distance d4 from the merging portion P1 to the front surface of the die 12 is greater than or equal to the distance d5 from the merging portion P1 to the back surface of the die 12. Increasing the distance d4 in this manner is advantageous in increasing the pressure applied to the granulated material before merging. From this point of view, it is preferable that the distance d4 is 2/3 or more of the thickness d6 of the die 12. On the other hand, if the distance d4 is too large, it becomes difficult to apply sufficient pressure to the granulated material after merging. From this viewpoint, it is preferable that the distance d4 is 4/5 or less of the thickness d6 of the die 12.

The through hole 13a extends obliquely with respect to the thickness direction of the die 12 in a section from the inlet 14a to the merging portion P1. Thereby, when the granulated material entering from the inlet 14a merges with the granulating material entering from the inlet 14b, it becomes easier to bring the granulated materials into close contact with each other.

The through hole 13b extends obliquely with respect to the thickness direction of the die 12 in a section from the inlet 14b to the merging portion P1. Thereby, when the granulated material entering from the inlet 14b merges with the granulating material entering from the inlet 14a, it becomes easier to bring the granulated materials into close contact with each other.

In plan view, the midpoint of the line segment connecting the center of the entrance 14a and the center of the entrance 14b overlaps the confluence P1. In this case, the length and angle of inclination of the route can be made the same between the section from the entrance 14a to the confluence P1 and the section from the entrance 14b to the confluence P1. As a result, before merging, the pressure applied to the granulated material entering from the inlet 14a becomes equal to the pressure applied to the granulated material entering from the inlet 14b. This is advantageous in increasing the homogeneity of the granulated material after merging.

In plan view, the center of the exit 15 overlaps with the merging portion P1. In this case, the granulated material after merging advances in the thickness direction of the die 12 and is extruded straight from the outlet 15 (in a direction perpendicular to the back surface of the die 12). This makes it easier to form the core portion 32 in the shape of a straight column (in this embodiment, a right circular column).

The core portion 32 is covered with a covering material (covering portion 34) containing an adhesive material. As a result, the granules 30 that have absorbed excrement can be adhered to each other, and a mass made of a plurality of used granules 30 can be formed. By forming a mass of granules 30 in this way, used granules 30 can be selectively removed from the excrement treatment material 6 in which unused granules 30 and used granules 30 are mixed. It becomes easy to remove.

During coating, the coating material is applied around each core 32 while rotating the drum 22 in which the core 32 is housed. This makes it easier to apply the coating material evenly around the entire periphery of each core portion 32.

When the granulation material is mainly composed of organic matter, it is advantageous to obtain granules 30 suitable for incineration. When the coating material is also mainly composed of organic matter, it is more advantageous to obtain the granules 30 suitable for incineration. The fact that the granular material 30 is suitable for incineration contributes to convenient disposal of the used granular material 30.

The present invention is not limited to the above embodiments, and various modifications are possible. In the embodiment described above, the case where two through holes (through holes 13a, 13b) share one outlet 15 is illustrated. However, three or more through holes may share one outlet 15.

In the above-mentioned embodiment, the case where the distance d4 from the confluence part P1 to the front surface of the die 12 in the thickness direction of the die 12 is greater than or equal to the distance d5 from the confluence part P1 to the back surface of the die 12 has been exemplified. However, the distance d4 may be smaller than the distance d5.

In the above embodiment, the case where the roller 16 was provided in the granulator 10 was illustrated. However, the granulator 10 does not need to be provided with the rollers 16. In that case, the granulated material may be forced into each through hole 13 by a known means other than the roller 16.

In the above embodiment, the case where the cutter 18 was provided in the granulator 10 was illustrated. However, the cutter 18 may not be provided in the granulator 10. In that case, the granulated material extruded from each through hole 13 may be cut by a known means other than the cutter 18.

In the above embodiment, the case where each granular body 30 has a multilayer structure (two-layer structure) consisting of a core part 32 and a covering part 34 is illustrated. However, providing the covering portion 34 is not essential. That is, each granule 30 may have a single-layer structure consisting only of uncoated granules (core portion 32). In that case, the coating machine 20 is not required and the coating process is not performed. This eliminates the need for a covering material, so that the manufacturing cost of the excrement disposal material 6 can be reduced.

In the embodiment described above, the case where the granular material 30 has water absorbency was illustrated. However, the granules 30 may have hydrophobicity. In order for the granular material 30 to have hydrophobicity, it is necessary that the liquid passage rate measured by the above-mentioned test be 60% or more. When such hydrophobic granules 30 are used, excrement passes through the gaps between the granules 30. In this case, by guiding the excrement to the bottom of the toilet, it is possible to prevent the bad odor generated from the excrement from leaking out from the upper part of the toilet.

1 Manufacturing device 6 Excrement disposal material 10 Granulator 12 Dice 13 Through hole 13a Through hole (first through hole)
13b Through hole (second through hole)
14a Entrance (first entrance)
14b Entrance (second entrance)
15 Outlet 16 Roller 17 Rotating shaft 18 Cutter 20 Coating machine 22 Drum (container)
30 Granular body 32 Core part (granulated material)
34 Covering part M1 Granulated material P1 Confluence part

Claims (26)

A method for producing an excrement treatment material made of granular material for treating excrement, the method comprising:
A granulation step of forming granules constituting the granular body by extrusion granulation of the granulation material using an extrusion granulation machine,
The extrusion granulator has a die provided with a plurality of through holes through which the granulation material passes,
The plurality of through holes include a first through hole having a first inlet, and a second through hole having a second inlet spaced apart from the first inlet,
A method for producing an excrement disposal material, wherein the first and second through holes have a common outlet. In the method for producing an excrement disposal material according to claim 1,
The method for producing an excrement disposal material, wherein the diameters of the first and second inlets are both smaller than the diameter of the outlet. In the method for producing an excrement disposal material according to claim 1 or 2,
The method for producing an excrement disposal material, wherein the sum of the opening areas of the first and second inlets is larger than the opening area of the outlet. In the method for producing an excrement disposal material according to claim 1 or 2,
The die has a merging part where the granulated material entering from the first inlet and the granulating material entering from the second inlet merge,
In the method for producing an excrement disposal material, the merging section exists between the front and back surfaces of the die. In the method for producing an excrement disposal material according to claim 4,
The method for manufacturing an excrement disposal material, wherein in the thickness direction of the die, the distance from the merging portion to the front surface of the die is equal to or longer than the distance from the merging portion to the back surface of the die. In the method for producing an excrement disposal material according to claim 5,
In the method for producing an excrement disposal material, the distance from the merging portion to the surface of the die in the thickness direction is 2/3 or more and 4/5 or less of the thickness of the die. In the method for producing an excrement disposal material according to claim 4,
In the method for manufacturing an excrement disposal material, the first through hole extends obliquely to the thickness direction of the die in a section from the first inlet to the confluence section. In the method for producing an excrement disposal material according to claim 4,
In the method for manufacturing an excrement disposal material, the second through hole extends obliquely to the thickness direction of the die in a section from the second entrance to the confluence section. In the method for producing an excrement disposal material according to claim 4,
In the method for manufacturing an excrement disposal material, the midpoint of a line segment connecting the center of the first inlet and the center of the second inlet overlaps the confluence section in plan view. In the method for producing an excrement disposal material according to claim 4,
In the method for producing an excrement disposal material, the center of the outlet overlaps the confluence section in plan view. In the method for producing an excrement disposal material according to claim 1 or 2,
The granulation material is a method for producing an excrement treatment material whose main material is organic matter. The method for producing an excrement disposal material according to claim 1 or 2,
A method for producing an excrement disposal material, including a covering step of covering the granules formed in the granulating step with a covering material. The method for producing an excrement disposal material according to claim 12,
In the coating step, the coating material is attached around the granules formed in the granulation step while rotating the container containing the granules. A device for manufacturing an excrement treatment material made of granular material for treating excrement,
An extrusion granulator having a die provided with a plurality of through holes through which the granulated material passes, and forming a granulated material constituting the granular body by extrusion granulating the granulated material,
The plurality of through holes include a first through hole having a first inlet, and a second through hole having a second inlet spaced apart from the first inlet,
An apparatus for producing an excrement disposal material, wherein the first and second through holes have a common outlet. The excrement disposal material manufacturing apparatus according to claim 14,
In the apparatus for manufacturing an excrement treatment material, the diameters of the first and second inlets are both smaller than the diameter of the outlet. The excrement disposal material manufacturing apparatus according to claim 14 or 15,
The apparatus for manufacturing an excrement disposal material, wherein the sum of the opening areas of the first and second inlets is larger than the opening area of the outlet. The excrement disposal material manufacturing apparatus according to claim 14 or 15,
The die has a merging part where the granulated material entering from the first inlet and the granulating material entering from the second inlet merge,
In the excrement disposal material manufacturing apparatus, the confluence section exists between the front surface and the back surface of the die. The excrement disposal material manufacturing apparatus according to claim 17,
The apparatus for producing an excrement disposal material, wherein in the thickness direction of the die, the distance from the merging part to the front surface of the die is equal to or longer than the distance from the merging part to the back surface of the die. The excrement disposal material manufacturing apparatus according to claim 18,
In the apparatus for producing an excrement disposal material, the distance from the merging portion to the surface of the die in the thickness direction is 2/3 or more and 4/5 or less of the thickness of the die. The excrement disposal material manufacturing apparatus according to claim 17,
In the excrement disposal material manufacturing apparatus, the first through hole extends obliquely to the thickness direction of the die in a section from the first inlet to the confluence section. The excrement disposal material manufacturing apparatus according to claim 17,
In the excrement disposal material manufacturing apparatus, the second through hole extends obliquely to the thickness direction of the die in a section from the second inlet to the confluence section. The excrement disposal material manufacturing apparatus according to claim 17,
In the excrement disposal material manufacturing apparatus, the midpoint of the line segment connecting the center of the first inlet and the center of the second inlet overlaps the confluence section in plan view. The excrement disposal material manufacturing apparatus according to claim 17,
In a plan view, the center of the outlet overlaps the confluence part of the excrement disposal material manufacturing apparatus. The excrement disposal material manufacturing apparatus according to claim 14 or 15,
The granulation material is an apparatus for producing an excrement treatment material whose main material is organic matter. The excrement disposal material manufacturing apparatus according to claim 14 or 15,
An apparatus for manufacturing an excrement treatment material, comprising a coating machine that coats the granules formed by the extrusion granulation machine with a coating material. The excrement disposal material manufacturing apparatus according to claim 25,
The coating machine has a container that accommodates the granules formed by the extrusion granulator, and coats the periphery of the granules while rotating the container containing the granules. Equipment for manufacturing excrement disposal materials that attaches materials.

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