Preparation method of wine brewing yeast block

Abstract

The preparation method of the wine brewing yeast block comprises the steps of secondary yeast treading and secondary pressing, namely filling a yeast block mold with a yeast material prepared according to a proportion; the bionic koji treading device treads the koji in the koji block mold for the first time; flattening the surface layer of the koji material in the koji block mold after primary koji treading; overturning the koji block mold to enable the bottom of the koji block mold to face upwards; the bionic koji treading device treads the koji material in the koji block mold for the second time; and carrying out compression treatment on the yeast material subjected to secondary yeast treading by a pressing device to prepare a yeast block. The invention further designs a brewing yeast block making system of the process. The method has the advantages that two-time treading and two-time pressing are carried out in the yeast block making process, so that the problem of inconsistent uniformity and compactness of upper and lower layer tissues of the yeast blocks is effectively solved; the bionic koji treading device enables internal tissues of the koji blocks to be well homogenized and high in consistency degree. According to the invention, assembly line work is realized while the advantages of manual yeast treading are reserved, the working efficiency is greatly improved, the production cost is reduced, and the bacterium cultivation effect is good.

Description

Technical Field

[0001] The invention relates to a wine-making technology, in particular to a method for preparing a wine-making koji block which can improve the homogenization of koji block tissue and the efficiency of koji block bacterial cultivation. Background Art

[0002] In the wine making process, there is an important process called koji block making or koji preparation. The so-called koji block making is to mix the raw materials (wheat, barley, peas, etc.) for making koji blocks according to the proportion. After the raw materials are treated with impurities, they are moistened and crushed. The amount of water added to the crushed koji is determined according to the calculated proportion. After the koji and water are mixed evenly, they are pressed into koji blocks by the koji making device and enter the next bacterial culture process. The traditional koji block making process is to put the stirred koji into a mold, and a person of appropriate weight will manually step on the koji. The koji in the mold is repeatedly stepped on by the soles of the feet to gradually homogenize the koji tissue and change from loose to dense, and finally pressed into a solid koji block. The advantage of this traditional method is that during the repeated stepping of the koji by the soles of the feet, the koji is fully homogenized and the internal density is consistent with the effect of kneading dough, which is conducive to the uniform growth of microorganisms in the subsequent koji block bacterial culture, and effectively reduces the deviation in the consistency of koji block bacterial culture. Although manual koji pressing has many advantages, its inevitable defects are low production efficiency and high cost. Currently, only a very small number of high-end wine production processes continue the manual koji pressing method, while the vast majority of wine production processes use mechanical devices to produce koji blocks. The mechanical koji making device presses the molded koji material on the assembly line several times to compact it into koji blocks, and then sends the formed koji blocks to the koji room (bacteria cultivation room) to enter the bacteria cultivation process. The mechanical koji making device has the advantages of high efficiency, low cost, and suitability for modern wine making technology, but the internal koji material uniformity and consistency of the tightness and density of the pressed koji blocks are not as good as those of manual koji pressing, which can easily lead to large fluctuations in the quality of koji cultivation.

[0003] The patent document with application number CN202320870230.8 and titled “An automatic koji-stepping machine” in the Chinese patent database discloses a technical solution, which uses the up and down reciprocating motion of a single foot mold to step on the koji. The foot mold described in this technology adopts a metal skeleton with a silicone layer coated on the outside, and the foot mold is driven by hydraulic pressure to step on the koji. Although this technology proposes the concept of a foot mold, it is not difficult to see from its technical solution that the foot mold and the stepping method are essentially no different from the common mechanical koji-making upper mold to press the koji material, which is very different from the manual stepping method and the stepping effect on the koji material. In addition, the one-time pressing process is currently commonly used, and there are differences in the uniformity and density of the upper and lower layers of the koji block, resulting in uneven bacterial cultivation of the koji blocks.

[0004] In view of this, it is an urgent problem to design a koji-making process that can highly imitate the manual koji-stepping process, improve the koji block culture effect and is suitable for the modern wine-making industry. Summary of the invention

[0005] The purpose of the present invention is to provide a method for preparing a brewing koji block with uniform internal structure, good bacterial culture effect, high production efficiency and low cost in view of the drawbacks of the prior art.

[0006] The problem described in the present invention is solved by the following technical solution: A method for preparing a brewing koji block comprises secondary koji stepping and secondary pressing, namely: filling a koji block mold with koji material prepared in proportion; performing a primary koji stepping on the koji material in the koji block mold by a bionic koji stepping device; flattening the surface of the koji material in the koji block mold after the primary koji stepping: turning the koji block mold over so that its bottom faces upward; performing a secondary koji stepping on the koji material in the koji block mold by the bionic koji stepping device; and performing a molding process on the koji material after the secondary koji stepping by a pressing device to form a koji block.

[0007] The brewing koji block preparation method is provided with a brewing koji block making system, which comprises a primary bionic koji stepping device, a primary pressing device, a koji block turning device, a secondary bionic koji stepping device, a secondary pressing device, and a first conveyor belt and a second conveyor belt, wherein the primary bionic koji stepping device and the secondary bionic koji stepping device have the same structure; In the above-mentioned method for preparing brewing koji blocks, the koji block turning device is provided with a turning table and a koji block dragging-in mechanism, the inlet of the turning table corresponds to one section of the conveyor belt, and the outlet of the turning table corresponds to two sections of the conveyor belt, the lower part of the inlet end of the turning table is supported by a support table, the upper part of the outlet end of the turning table passes through a rotating shaft, and one end of the rotating shaft is fixedly connected to a turning motor; two sets of koji block dragging-in mechanisms are symmetrically arranged on both sides of the turning table, the koji block dragging-in mechanism is provided with a drag motor, a lead screw and a nut, the nut is provided with an electromagnet corresponding to the koji block mold, the lead screw and the nut constitute a threaded pair, the lead screw is connected to the drag motor, and two slide rails are fixed in parallel on the frame, and each nut is slidably matched with the slide rails.

[0008] In the above-mentioned method for preparing brewing koji blocks, the structures of the primary bionic koji-stepping device and the secondary bionic koji-stepping device are the same, and the primary bionic koji-stepping device and the secondary bionic koji-stepping device are respectively provided with a koji-stepping workbench, a koji-stepping motion mechanism and a koji-stepping rod limiting mechanism, the koji-stepping motion mechanism is located at the upper part of the koji-stepping workbench, the koji-stepping workbench supports the conveyor belt, the koji-stepping motion mechanism is provided with a koji-stepping drive motor, a main shaft, and a support column, the bottom of the support column is fixed to the frame, the koji-stepping drive motor is fixed to the top of the support column, and several cam groups are installed on the main shaft in parallel and at intervals, each cam group is provided with two cams, and the raised parts of the two cams are staggered, and a cam mounting plate is provided on one side of each cam, and the cam mounting plate is provided with screw holes along the circumferential direction, and the cam is fixed to the cam mounting plate by screws, and a pressing rod corresponds to the lower part of each cam, and a bionic foot mold is installed at the lower part of the pressing rod, and the sum of the width dimensions of a row of bionic foot molds matches the width of the koji block mold.

[0009] The above-mentioned method for preparing brewing koji blocks, the bionic foot mold includes a bionic skeleton, an elastic sleeve, a toe post frame and an elastic toe post, the upper part of the bionic skeleton is fixedly connected to the bottom of the pedal rod, the lower part of the bionic skeleton has convex heel parts and sole parts at both ends, the middle part is a concave arch part, the arch part smoothly connects the heel part and the sole part, and the bionic skeleton is covered with an elastic sleeve; the toe post frame is fixedly connected to the upper part of the bionic skeleton, the toe post frame extends toward the direction of the sole part, the elastic toe post is installed at the front end of the toe post frame, and the number of the elastic toe posts is 3-6.

[0010] In the above-mentioned method for preparing brewing koji blocks, the pressure rod limiting mechanism is provided with a group of limiting sleeves, each limiting sleeve is connected by a cross bar, each limiting sleeve is respectively arranged in the middle of the pressure rod and slidingly cooperates with the pressure rod, one end of the cross bar and the cross bar seat assembly form an adjustable support in the upper and lower positions, the other end of the cross bar is fixedly connected to the cross bar adjustment sleeve, and the upper and lower ends of the cross bar adjustment sleeve are fixed with locking nuts.

[0011] The main advantages of the present invention are as follows: 1. The process of making the koji block needs to be stepped on twice and pressed twice. After the koji material is stepped on and pressed once, the koji block mold and the koji material are turned 180 degrees, with the bottom facing up, and stepped on and pressed again, which effectively solves the problem of uneven uniformity and density of the upper and lower layers of the koji block. 2. The bionic bending device is based on the bionic principle to produce a bionic foot model that is very similar to the structure of the human foot sole. The bionic foot model is provided with toes, soles, center and heels. The heels and soles are convex outwards to form strong steps on the bent material, while the concave center can form a buffering part for the bent material; in particular, the toes can perform multi-point dispersed weak steps on the bent material to loosen the bent material. As the bent block mold moves, the strong stepping part, buffer part and loosening part of the bionic foot model constantly change positions, and the bent material is subjected to a uniform treatment similar to the effect of repeated dough kneading, thereby achieving good uniformity of the internal structure of the bent block and a high degree of consistency; 3. The primary pressing device and the secondary pressing device use different pressing upper dies. The upper surface of the curved block after the primary pressing is a plane, so as to facilitate secondary bending and pressing. The upper surface of the curved block after the secondary pressing is a multi-spherical surface with dense spacing, thereby increasing the contact area between the curved block and the air during the bacterial cultivation process, facilitating heat dissipation during the bacterial cultivation process, and improving the bacterial cultivation efficiency.

[0012] In summary, the present invention achieves assembly line operation while retaining the advantages of manual treading, greatly improves work efficiency, reduces production costs, and has a good bacterial cultivation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention will be further described below in conjunction with the accompanying drawings.

[0014] Figure 1 It is a schematic diagram of the process of the present invention; Figure 2 It is a structural schematic diagram of the turning table; Figure 3 It is a schematic diagram of the structure of the turning device (the curved block mold does not enter the turning table); Figure 4 It is a schematic diagram of the structure of the turning device (the curved block mold is located on the turning table); Figure 5 Schematic diagram of the structure of the bionic pedaling device; Figure 6 It is a schematic diagram of a set of cams and cam mounting plates; Figure 7 It is a schematic diagram of the structure of the bionic foot model; Figure 8 It is a structural schematic diagram of a primary pressing device; Fig. 9 It is a structural schematic diagram of the secondary pressing device.

[0015] The reference numerals in the figure represent: 1. a conveyor belt; 2. a bionic stepping device; 2-1. a stepping workbench; 2-2. a cam mounting plate; 2-3. a cam; 2-4. a spacer; 2-5. a spindle; 2-6. a stepping drive motor; 2-7. a support column; 2-8. a crossbar adjustment sleeve; 2-9. a locking nut; 2-10. a crossbar; 2-11. a limit sleeve; 2-12. an elastic toe column; 2-13. a stepping rod; 2-14. a spring; 3. a pressing device; 3-1. a pressing workbench; Table, 3-2, flattening cylinder, 3-3, flattening upper mold, 4, flipping device, 4-1, flipping table, 4-2, rotating shaft, 4-3, supporting table, 4-4, nut, 4-5, screw, 4-6, slide rail, 4-7, drag motor, 4-8, flipping motor, 4-9, electromagnet, 5, secondary bionic bending device, 6, secondary pressing device, 6-1, secondary pressing workbench, 6-2, secondary pressing cylinder, 6-3, secondary pressing upper mold, 7, two-stage conveyor belt, 8, bending block mold, 9, bending block. DETAILED DESCRIPTION

[0016] See also Figure 1 The present invention improves the traditional one-time pressing into a secondary pressing of the upper and lower surfaces of the curved block, and adds a high-simulation artificial pressing process before each pressing. The specific process is as follows: a. The prepared koji material according to the prior art is fed into the koji block mold by an auger, and the koji block mold 8 filled with koji material is fed into the primary bionic koji stepping device 2 by a section of conveyor belt 1. When the koji block mold moves slowly along the section of conveyor belt, a row of bionic foot molds of the primary bionic koji stepping device simulate human feet to step on the koji material alternately, so that the koji material structure in the upper part of the koji block mold is uniform.

[0017] b. The block mold enters the primary pressing device 3 along a conveyor belt. The primary pressing device is equipped with a flattening cylinder. The flattening cylinder presses down to flatten the upper mold to flatten the surface of the bent material. After the primary pressing device flattens the upper surface of the bent material that has been stepped on once, the upper surface of the bent material is solidified so that the bent material will not be scattered when the block mold is turned over as a whole, and at the same time, it is ensured that the surface of the bent material has a good contact with the conveyor belt after turning over. The pressing amount of the flattening cylinder needs to be controlled. If the mold is 9 cm thick, the thickness of the bent block should be pressed down to 6-6.5 cm after it is pressed to avoid excessive pressing that causes the bent material to be overly dense as a whole.

[0018] c. After one pressing, the curved material mold enters the turning device and turns 180 degrees, with the bottom facing up and turned onto the second-stage conveyor belt 7.

[0019] d. The second-stage conveyor belt transports the curved block mold to the secondary bionic bending device 5. When the curved block mold moves slowly along the second-stage conveyor belt, a row of bionic foot molds in the secondary bionic bending device simulate human feet to step on the curved material for the second time, so that the structure of the curved material at the lower part of the first step is uniform, thereby achieving complete uniformity of the curved material structure at different positions in the curved block mold.

[0020] e. The block mold is further transported to the secondary pressing device by the second conveyor belt. The secondary pressing device is equipped with a press cylinder, which presses down to complete the pressing of the block. The pressed block is demoulded and transported away according to the existing technology. The block mold is a frame structure, with four frames surrounding a rectangular cylinder, and the bottom of the frame is supported by a conveyor belt and a secondary pressing workbench.

[0021] The invention performs secondary bending and secondary pressing on the upper and lower layers of the molded material, which is the key to achieving uniform and consistent texture of the molded material. To achieve the secondary bending and secondary pressing, the mold of the molded block must be turned 180 degrees by a turning device after the first bending and pressing, so that its bottom surface faces upward. Figure 1-Figure 4The block turning device 4 is provided with a turning table 4-1 and a block dragging mechanism. The left entrance of the turning table corresponds to a section of conveyor belt 1, and the right side of the turning table corresponds to a second section of conveyor belt 7. The lower part of the turning table entrance end is supported by a support table 4-3, and the upper part of the right end of the turning table passes through a rotating shaft 4-2. One end of the rotating shaft is fixedly connected to a turning motor 4-8. The rotating shaft is circumferentially fixed to the turning table. The turning motor drives the rotating shaft to rotate a certain angle, and the rotating shaft drives the turning table to complete the turning action. The function of the block dragging mechanism is to drag the block mold located at the end of a section of conveyor belt into the turning table and buckle the block mold on the second section of conveyor belt. Two sets of block dragging mechanisms are symmetrically arranged on both sides of the turning table. The block dragging mechanism is provided with a drag motor 4-7, a lead screw 4-5 and a nut 4-4. The nut is provided with an electromagnet 4-4 for adsorbing the block mold. The lead screw and the nut constitute a threaded pair. The lead screw is connected to the drag motor. Two slide rails are fixed in parallel on the frame, and each nut is respectively slidably matched with the slide rails. When a conveyor belt transports the curved block mold to the left side of the turning table, the nut is located on the left side of the screw. Figure 3 As shown; two electromagnets are energized to attract the two sides of the curved block mold respectively, and the two drag motors rotate synchronously, driving the lead screw to rotate, and the nut and electromagnet drag the curved block mold into the turning table, as shown Figure 4 As shown; then the electromagnet loses power, the drag motor reverses, the nut returns, the flip motor starts, the curved block mold flips with the flip table and buckles onto the second-stage conveyor belt 7, which is transported by the second-stage conveyor belt for secondary bending and secondary pressing processes, the flip motor reverses, and the flip table returns.

[0022] The structures of the primary bionic pedaling device 2 and the secondary bionic pedaling device 5 are the same. The structure of the primary bionic pedaling device is described in detail below with reference to the accompanying drawings. Figure 5-Figure 9 The bionic pedaling device 2 is provided with a pedaling workbench 2-1, a pedaling motion mechanism and a pedaling rod limiting mechanism. The pedaling motion mechanism is located at the upper part of the pedaling workbench, and the pedaling workbench 2-1 supports a section of conveyor belt 1. The pedaling motion mechanism is provided with a pedaling drive motor 2-6, a support column 2-7 and a main shaft 2-5 connected to the pedaling drive motor, the bottom of the support column is fixed to the frame, and the pedaling drive motor is fixed to the top of the support column. Several cam groups are installed on the main shaft in parallel and at intervals, each cam group is provided with two cams 2-3, and the tips of the two cams are staggered. A cam mounting plate 2-2 is provided on one side of each cam, and screw holes are arranged on the cam mounting plate along the circumferential direction. The cam mounting plate is fixed to the main shaft circumferentially, and the cam is fixed to the cam mounting plate by screws. The spatial position of the tip of the cam can be changed by adjusting different screw holes. A pressing rod 2-13 corresponds to the lower part of each cam, and a bionic foot mold is installed at the lower part of the pressing rod. The sum of the width dimensions of a row of bionic foot molds matches the width of the curved block mold, so that a row of bionic foot molds can cover the width of the curved block mold to avoid missing parts of the curved material. Figure 5In the embodiment shown, two cam groups, four cams, and four bionic foot models are provided, and the installation orientations of two cams in one group differ by 90 degrees. The upper part of the bionic skeleton is fixedly connected to the bottom of the stepping rod, the two ends of the lower part of the bionic skeleton are the convex heel and sole parts of the human foot, and the middle part is the concave arch part. The arch part smoothly connects the heel part and the sole part, and the bionic skeleton is covered with an elastic sleeve (such as Figure 7 As shown in the figure, the bent material can be stepped on more carefully, and the number of toe posts is 3-6. When the bent block mold slowly passes through the bionic bending device, when each cam rotates with the main shaft, the convex parts of a group of two cams are alternately pressed on the top of the stepping rod, and the stepping rod drives the bionic foot mold to step on the bent material alternately, just like a human foot stepping on the bent material alternately. The working principle of using the bionic foot mold to step on the bent material is as follows: when the bionic foot mold steps on the bent material, the convex heel part and the sole part form a strong step on the bent material, while the concave sole part can form a buffer part for the bent material. Under the action of the stepping pressure of the heel part and the sole part, the bent material moves to the sole part. In the continuous shifting and stepping process, the uniformity of the inner part of the bent material is achieved through the local displacement of the bent material. The above-mentioned stepping process is similar to kneading dough. After repeated and continuous multi-directional extrusion of the bent material, the bent material structure is fully uniform. The toe post made of elastic material acts as the toes of human body. The weak stepping of the toes on the curved material at multiple points during the stepping process can form a loosened part in the curved material, avoid local over-hardening, and be beneficial to the consistency of the density inside the curved material.

[0023] See also Figure 5 The described pressure rod limiting mechanism is provided with a set of limiting sleeves 2-11, each limiting sleeve is fixedly connected by a cross bar 2-10, each limiting sleeve is respectively sleeved on the middle part of the pressure rod and forms a sliding fit with the pressure rod. The right end of the cross bar is fixedly connected to the cross bar adjustment sleeve 2-8, the cross bar adjustment sleeve is sleeved on the support column, and locking nuts 2-9 are respectively provided on the upper and lower parts of the cross bar adjustment sleeve. By loosening the locking nuts, the height of the cross bar adjustment sleeve and each limiting sleeve can be adjusted. A support frame is provided on the left side of the cross bar, and the support height of the support frame can be adjusted. The function of the pressure rod limiting mechanism is to achieve the smooth movement of the pressure rod and adjust the elastic force of the spring 2-14.

[0024] See also Figure 1 , Figure 8 , Fig. 9The structures of the primary pressing device 3 and the secondary pressing device 6 are basically the same, but the pressing surfaces of the upper mold are different. The primary pressing device is provided with a primary pressing workbench 3-1, which supports a section of conveyor belt 1. A flattening cylinder 3-2 is arranged on the upper part of the primary pressing workbench. The piston rod of the flattening cylinder is connected to the flattening upper mold 3-3. The pressing surface of the flattening upper mold is a plane. When the curved block mold moves to the bottom of the flattening cylinder with the primary conveyor belt, the primary conveyor belt pauses, the flattening cylinder is actuated, and the upper surface of the curved material is flattened. Then the flattening cylinder returns to its position, and the primary conveyor belt continues to move. The secondary pressing device 6 is provided with a secondary pressing workbench 6-1, which supports a second section of conveyor belt 7. A profiling cylinder 6-2 is arranged on the upper part of the secondary pressing workbench. The piston rod of the profiling cylinder is connected to the profiling upper mold 6-3. The profiling surface of the profiling upper mold is a curved surface. The illustrated embodiment is an arc surface, and a wavy surface can also be used. After the secondary pressing process, the upper surface of the formed block is a non-planar geometric surface, which can increase the area of ​​the block in contact with the air during the bacterial culture process and improve the bacterial culture efficiency. When the block mold moves with the secondary conveyor belt to the bottom of the pressing cylinder, the secondary conveyor belt stops, the pressing cylinder moves to press the block, the pressing cylinder returns to its position, and the secondary conveyor belt continues to move to send the block mold and the formed block out for demolding and transportation. The secondary pressing device can also set multiple pressing cylinders according to the state of the block, and perform multiple pressing processes on the block to ensure that the block structure is more compact.

Claims

1. A method for preparing brewing koji blocks, characterized in that: The method includes secondary bending and secondary pressing, namely: the block mold is filled with the bent material prepared in proportion; the bent material in the block mold is bent once by a bionic bending device; the surface of the bent material in the block mold is flattened after the first bending: the block mold is turned over so that its bottom faces upward; the bionic bending device bends the bent material in the block mold for the second time; the bent material bent for the second time is pressed by a pressing device to form a block.

2. The method for preparing brewing koji blocks according to claim 1, characterized in that: A brewing koji block making system is provided, which includes a primary bionic koji-stepping device, a primary pressing device, a koji block turning device, a secondary bionic koji-stepping device, and a secondary pressing device which are arranged in sequence, and also includes a first conveyor belt and a second conveyor belt, wherein the primary bionic koji-stepping device and the secondary bionic koji-stepping device have the same structure.

3. The method for preparing brewing koji blocks according to claim 2, characterized in that: The curved block turning device is provided with a turning table and a curved block dragging-in mechanism. The entrance of the turning table corresponds to a section of conveyor belt, and the exit of the turning table corresponds to two sections of conveyor belt. The lower part of the entrance end of the turning table is supported by a support table, and the upper part of the exit end of the turning table passes through a rotating shaft, and one end of the rotating shaft is fixedly connected to a turning motor; two sets of curved block dragging-in mechanisms are symmetrically arranged on both sides of the turning table, and the curved block dragging-in mechanism is provided with a dragging motor, a lead screw and a nut. The nut is provided with an electromagnet corresponding to the curved block mold, and the lead screw and the nut constitute a threaded pair. The lead screw is connected to the dragging motor, and two slide rails are fixed in parallel on the frame, and each nut is respectively slidably matched with the slide rails.

4. The method for preparing brewing koji blocks according to claim 2, characterized in that: The structures of the primary bionic pedaling device and the secondary bionic pedaling device are the same. The primary bionic pedaling device and the secondary bionic pedaling device are respectively provided with a pedaling workbench, a pedaling movement mechanism and a pedaling pressure rod limiting mechanism. The pedaling movement mechanism is located at the upper part of the pedaling workbench, the pedaling workbench supports the conveyor belt, the pedaling movement mechanism is provided with a pedaling drive motor, a main shaft, and a support column. The bottom of the support column is fixed to the frame, the pedaling drive motor is fixed to the top of the support column, and several cam groups are installed on the main shaft in parallel and at intervals, each cam group is provided with two cams, and the raised parts of the two cams are staggered. A cam mounting plate is provided on one side of each cam, and screw holes are arranged on the cam mounting plate along the circumferential direction. The cam is fixed to the cam mounting plate by screws, and a pedaling pressure rod corresponds to the lower part of each cam, and a bionic foot mold is installed at the lower part of the pedaling pressure rod, and the sum of the width dimensions of a row of bionic foot molds matches the width of the bending block mold.

5. The method for preparing brewing koji blocks according to claim 2, characterized in that: The bionic foot mold comprises a bionic frame, an elastic sleeve, a toe post frame and an elastic toe post. The upper part of the bionic frame is fixedly connected to the bottom of the pedal rod, the lower part of the bionic frame has convex heel parts and sole parts at both ends, the middle part is a concave arch part, the arch part smoothly connects the heel part and the sole part, and the bionic frame is covered with an elastic sleeve; the toe post frame is fixedly connected to the upper part of the bionic frame, the toe post frame extends toward the sole part, and the elastic toe post is installed at the front end of the toe post frame, and the number of the elastic toe posts is 3-6.

6. The method for preparing brewing koji blocks according to claim 2, characterized in that: The pressure rod limiting mechanism is provided with a group of limiting sleeves, each limiting sleeve is connected by a cross bar, each limiting sleeve is respectively arranged in the middle of the pressure rod and slidingly cooperates with the pressure rod, one end of the cross bar and the cross bar seat assembly form an adjustable support in the upper and lower positions, the other end of the cross bar is fixedly connected to the cross bar adjustment sleeve, and the upper and lower ends of the cross bar adjustment sleeve are fixed with locking nuts.

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