Twin-screw extruder and method for producing plant-derived textured protein

Abstract

This invention provides a twin-screw extruder capable of efficiently producing high-quality plant-derived textured proteins, and a method for producing plant-derived textured proteins. [Solution] A twin-screw extruder according to one embodiment includes a cylinder 100 provided along the axial direction and having a raw material supply port and a liquid supply port; a raw material supply mechanism that supplies raw materials for plant-based textured protein from the raw material supply port 120 to the cylinder; a liquid supply mechanism 300 that supplies a liquid to be mixed with the raw materials from the liquid supply port 130 to the cylinder; screws 151 and 152 rotatably installed inside the cylinder 100 for mixing the raw materials and the liquid; a heater 180 that heats the cylinder divided into multiple zones along the axial direction; and a controller 400 that controls the heater for each zone.

Description

Technical Field

[0001] The present disclosure relates to a twin-screw extruder and a method for producing plant structured protein.

Background Art

[0002] Patent Document 1 discloses an apparatus for producing soy meat.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In an apparatus for producing plant structured protein such as soy meat, it is desired to efficiently produce high-quality plant structured protein. Other problems and novel features will become apparent from the description of this specification and the accompanying drawings.

Means for Solving the Problems

[0005] A twin-screw extruder according to an embodiment includes a cylinder provided along an axial direction and having a raw material supply port for raw materials and a liquid supply port for liquid, a raw material supply mechanism for supplying a raw material of plant structured protein from the raw material supply port to the cylinder, a liquid supply mechanism for supplying a liquid to be mixed with the raw material into the cylinder from the liquid supply port, two screws rotatably installed in the cylinder for mixing the raw material and the liquid, a drive mechanism for driving the two screws, a heater for heating the cylinder divided into a plurality of zones in the axial direction, and a controller for controlling the heater for each zone.

[0006] A method for producing plant-derived tissueed protein according to one embodiment includes the steps of: heating the cylinder in a plurality of zones along the axial direction of the cylinder; supplying the raw material for plant-derived tissueed protein to the cylinder; supplying the liquid to the cylinder; rotating two screws installed in the cylinder to convey the raw material and the liquid through the internal space of the cylinder while mixing them; and pushing out the mixture of the raw material and the liquid from the tip of the cylinder. [Effects of the Invention]

[0007] According to the above embodiment, a twin-screw extruder capable of producing high-quality plant-derived textured proteins and a method for producing plant-derived textured proteins can be provided. [Brief explanation of the drawing]

[0008] [Figure 1] This is a schematic side view showing the configuration of a twin-screw extruder according to the embodiment. [Figure 2] This diagram schematically shows the configuration of a twin-screw extruder according to the embodiment. [Figure 3] This is a flowchart showing the method for producing soy meat. [Figure 4] This is a photograph of a sample of the soy meat that was created. [Figure 5] This graph shows the evaluation results of samples produced by the twin-screw extruder according to the embodiment. [Figure 6] This graph shows the evaluation results of samples produced by the twin-screw extruder according to the embodiment. [Figure 7] This graph shows the evaluation results of samples produced by the twin-screw extruder according to the embodiment. [Figure 8] This graph shows the evaluation results of samples produced by the twin-screw extruder according to the embodiment. [Modes for carrying out the invention]

[0009] The following describes specific embodiments in detail with reference to the drawings. However, the embodiments are not limited to those described below. Also, for clarity, the following descriptions and drawings have been simplified as appropriate.

[0010] Referring to Figures 1 and 2, the configuration of a twin-screw extruder for producing plant-derived textured proteins will be described. Figure 1 is a schematic side view showing the configuration of the twin-screw extruder 1. Figure 2 is a schematic top view showing the internal configuration of the cylinder 100 of the twin-screw extruder 1. Note that in Figures 1 and 2, the apparatus is simplified as appropriate.

[0011] In the following explanation, we will use the XYZ three-dimensional Cartesian coordinate system. The axial direction of the twin-screw extruder 1 is defined as the Z direction, and the cross-section perpendicular to the Z direction is defined as the XY plane. The +Y direction is defined as the vertically upward direction, and the -Y direction is defined as the vertically downward direction. The X direction is the direction in which the two screws are aligned. In other words, the rotation axes of the two screws are positioned a predetermined distance apart in the X direction. Also, the XZ plane is the horizontal plane. Of course, the Y direction is not limited to the vertical direction, and the XZ plane is not limited to the horizontal plane.

[0012] As shown in Figure 1, the twin-screw extruder 1 comprises a cylinder 100, a feeder 200, and a liquid supply mechanism 300. Furthermore, as shown in Figure 2, the twin-screw extruder 1 comprises screws 151 and 152, screw motors 161 and 162, a heater 180, and a controller 400.

[0013] The cylinder 100 is positioned along the Z-direction. As shown in Figure 2, the cylinder 100 rotatably holds two screws 151 and 152. The two screws 151 and 152 are arranged side by side in the internal space 110 of the cylinder 100. The rotation axis AX1 of screw 151 and the rotation axis AX2 of screw 152 are parallel to the Z-direction.

[0014] On the outer peripheral surface of the cylinder 100, a raw material supply port 120 and a liquid supply port 130 are provided. A feeder 200 is connected to the raw material supply port 120. The liquid supply port 130 is connected to a liquid supply mechanism 300. The raw material supply port 120 and the liquid supply port 130 are through-holes provided in the outer peripheral wall of the cylinder 100 and are connected to the internal space 110 of the cylinder 100.

[0015] The feeder 200 serves as a raw material supply mechanism that supplies raw materials to the cylinder 100 through the raw material supply port 120. As the feeder 200, for example, a screw feeder, a table feeder, a vibrating feeder, or a circular feeder can be used. As the raw material, a powder such as soybean powder is used. For example, the feeder 200 supplies defatted soybean powder to the cylinder 100 at a constant supply rate.

[0016] Of course, the raw material is not limited to soybeans. For example, the raw material may be a powder such as peas or rice bran. The raw material may be any plant-based material containing protein. In FIG. 1, the feeder 200 supplies raw materials from above into the internal space 110 of the cylinder 100. Here, the twin-screw extruder 1 will be described as a soybean meat manufacturing apparatus that manufactures soybean meat using soybean powder as a raw material.

[0017] The liquid supply mechanism 300 is connected to the liquid supply port 130. The liquid supply mechanism 300 supplies liquid into the cylinder 100 from the liquid supply port 130. For example, the liquid supply mechanism 300 is a rotary pump, a reciprocating pump, a centrifugal pump, or a propeller pump. The liquid supply mechanism 300 supplies water to be mixed with the raw material to the cylinder 100. In FIG. 1, the liquid supply mechanism 300 supplies water into the internal space 110 of the cylinder 100 from above. For example, the supply ratio of the raw material to water is in the range of 5:5 to 8:2 by weight. Here, the supply ratio is 60% for the raw material and 40% for water.

[0018] On the -Z side end of the cylinder 100, two screw motors 161 and 162 are attached. The screw 151 is connected to the screw motor 161 via bearings or the like. The screw motor 161 rotates the screw 151 around the rotation axis AX1. The screw 151 is connected to the screw motor 161 via bearings or the like. The screw 152 rotates around the rotation axis AX2. In the internal space 110 of the cylinder 100, the two screws 151 and 152 are arranged in parallel along the Z direction.

[0019] The screw motors 161 and 162 are servo motors or the like and are controlled by the controller 400. For example, the controller 400 has a personal computer or the like and is configured to allow the user to set the rotation speed. The controller 400 outputs a control signal for driving the screw motors 161 and 162. The screw motors 161 and 162 rotate the screws 151 and 152 at a constant rotation speed respectively. Thus, the controller 400 controls the rotation speed of the screws 151 and 152.

[0020] The screws 151 and 152 are provided for transporting the raw material in the +Z direction. By rotating the screws 151 and 152, the raw material and water are mixed and transported. That is, the raw material is transported in the +Z direction while absorbing moisture. The raw material and water are mixed to form a mixture. That is, in the internal space 110 of the cylinder 100, a mixture is generated by mixing the raw material and water. Here, the +Z side is the downstream side of the transport direction, and the -Z side is the upstream side.

[0021] In FIG. 2, the flights of the screws 151 and 152 are constant, but they may have different inclinations and sizes depending on the Z-direction position. Also, the rotation directions of the screw 151 and the screw 152 may be the same or opposite. The rotation speeds of the screws 151 and 152 are 150 - 350 rpm. Here, the rotation speeds of the screws 151 and 152 are set to 250 rpm.

[0022] The flange at the +Z end of the cylinder 100 is designated as the tip flange 141. A breaker plate 142 and a die 143 are connected to the +Z side of the tip flange 141. The mixture generated in the internal space 110 of the cylinder 100 passes through the opening in the breaker plate 142 and is pushed out from the die 143. The die 143 may be a cooled die that has been cooled to a predetermined temperature. For example, the die 143 may be kept at room temperature up to a diameter of 3030°C.

[0023] Cylinder 100 has multiple containers 101-109. The multiple containers 101-109 are arranged along the Z direction. The multiple containers 101-109 are connected in series. Here, cylinder 100 is composed of nine containers 101-109, but the number of containers is not particularly limited. The multiple containers 101-109 are arranged coaxially. The flanges of adjacent containers 101-109 are fixed with bolts or the like. The container 109 furthest downstream is the final stage container. Therefore, the mixture from container 109 is pushed out from die 143 via breaker plate 142.

[0024] The supply positions of raw materials and liquids in the Z direction are variable. For example, as shown in Figure 2, each of the containers 101 to 109 is provided with a raw material supply port 120 and a liquid supply port 130. The supply position of the raw materials can be changed by changing the mounting position of the feeder 200. In Figure 1, the feeder 200 is attached to the raw material supply port 120 of container 104. Therefore, the feeder 200 supplies raw materials to container 104 via the raw material supply port 120. The supply position of the raw materials can be changed by changing the container to which the feeder 200 is attached. For example, by attaching the feeder 200 to the raw material supply port 120 of container 103, the supply position of the raw materials can be moved upstream. Furthermore, raw materials may be supplied from multiple locations on the cylinder 100.

[0025] Thus, the cylinder 100 has multiple raw material supply ports 120. The multiple raw material supply ports 120 are arranged along the Z direction. Therefore, the raw material supply position in the Z direction can be varied. In other words, a feeder 200 is attached to one of the multiple raw material supply ports 120 provided on the cylinder 100, selected from among them. Then, by changing the mounting position of the feeder 200, the raw material supply position can be changed.

[0026] Furthermore, in Figure 1, the liquid supply mechanism 300 is attached to the liquid supply port 130 of container 105. Therefore, the liquid supply mechanism 300 supplies liquid to container 105 via the liquid supply port 130. The liquid supply position can be changed by changing the mounting position of the liquid supply mechanism 300. For example, by attaching the liquid supply mechanism 300 to the liquid supply port 130 of container 106, the liquid supply position can be moved downstream. It is preferable that the liquid supply position be downstream of the raw material supply position. Here, container 105 to which the liquid supply mechanism 300 is attached is adjacent to container 104 to which the feeder 200 is attached. Of course, it is not necessary for all containers 101 to 109 to be provided with a raw material supply port 120.

[0027] The cylinder 100 has multiple liquid supply ports 130. The multiple liquid supply ports 130 are arranged along the Z direction. Therefore, the liquid supply position in the Z direction can be varied. In other words, the feeder 200 is attached to one of the multiple liquid supply ports 130 provided on the cylinder 100, selected from among them. Then, the liquid supply position can be changed by changing the mounting position of the liquid supply mechanism 300. Of course, not all containers 101 to 109 are provided with liquid supply ports 130. Also, the liquid supply ports 130 and the raw material supply ports 120 may be a common through-port.

[0028] As shown in Figure 2, a heater 180 is installed around the cylinder 100. The heater 180 can be a sheath heater, ceramic heater, coil heater, lamp heater, etc. The heater 180 heats the cylinder 100. The controller 400 has a temperature controller that adjusts the temperature of the heater 180. For example, the controller 400 provides feedback control to the heater 180 so that the cylinder 100 reaches a set temperature set by the temperature controller. In this case, a temperature sensor (not shown) or the like may be attached to the cylinder 100.

[0029] Here, the cylinder 100 is divided into multiple zones in the Z direction. The heater 180 heats the cylinder 100 in these multiple zones in the Z direction. The controller 400 can change the set temperature for each zone. The controller 400 can control the heater 180 for each zone.

[0030] Here, each of the containers 101 to 109 corresponds to a zone. Therefore, the cylinder 100 is divided into nine zones. For example, the heaters 180 for containers 101 to 109 are on separate circuits. The user can input a set temperature for each container.

[0031] The controller 400 provides feedback control to the heater 180 so that containers 101 to 109 are heated to separate set temperatures. In this way, the cylinder 100 can be heated to a desired temperature distribution in the Z direction. Thus, the raw materials and mixtures can be heated to temperatures suitable for each process. Of course, multiple containers may be set up as a single zone, or a single container may be divided into multiple zones.

[0032] The following is an example of a temperature distribution. Containers 101 to 104 are at 30°C (room temperature). Container 105 is heated to 80°C. Container 106 is heated to 120°C. Container 107 is heated to 130°C. Container 108 is heated to 150°C. Container 109 is heated to 135°C. Of course, the heating temperatures are not limited to the values ​​above. For example, the set temperature for container 108 can be set in the range of 130°C to 170°C. Furthermore, it is preferable to set the set temperature for container 108 in the range of 120°C to 155°C. The set temperature for container 109 can be set in the range of 120°C to 155°C. By doing so, high-quality soy meat can be produced.

[0033] It is preferable that the set temperature of the final container 109 be lower than the set temperature of the preceding container 108. In other words, the temperature of the downstream container 109 is lower than the temperature of the adjacent container 108. By doing so, high-quality soy meat can be produced.

[0034] Furthermore, in the Z direction, the cylinder 100 is divided into multiple regions A1 to A4 depending on the process. Regions A1, A2, A3, and A4 are located in that order from the upstream side of the cylinder 100.

[0035] For example, region A1 is the area from the upstream end of cylinder 100 to the liquid supply position. Here, region A1 extends to the liquid supply port 130 in Figure 1. Region A1 is the conveying region where the raw material is transported. Region A2 is the area from the liquid supply position to the boundary between container 106 and container 107. Region A2 is the mixing region where the raw material and liquid are mixed.

[0036] Region A3 is the area from the boundary between containers 106 and 107 to partway down container 109. This region A3 is the melt-kneading region where the heated raw materials melt and are kneaded. Region A4 is the area from container 109 to the downstream end face of cylinder 100. Region A4 is the cooling-extrusion region where the mixture cools and is extruded.

[0037] In regions A2 and A3, it is preferable to heat the mixture so that the temperature gradually increases towards the downstream side. In other words, in the regions where the raw materials and water are mixed and kneaded, the temperature is gradually increased towards the downstream side. Here, since the set temperature is increased for each container, the temperature of the cylinder 100 increases in stages as it moves downstream. Therefore, the mixture is gradually heated and kneaded as it is conveyed. Furthermore, in region A4, it is preferable to set the temperature lower than the highest set temperature in region A3. By doing so, the temperature of the mixture extruded from the die 143 can be lowered to the desired temperature, thereby enabling the production of high-quality soy meat.

[0038] The user can set the temperature and rotation speed using the controller 400. In this way, the temperature and rotation speed can be adjusted to values ​​suitable for soy meat production. Furthermore, the controller 400 may also be able to control the raw material supply speed in the feeder 200 and the liquid supply speed in the liquid supply mechanism 300.

[0039] Furthermore, the cylinder 100 is equipped with a pressure gauge 190. The pressure gauge 190 measures the pressure in the internal space 110 of the cylinder 100. In addition, gas may be supplied so that the internal space 110 of the cylinder 100 reaches a predetermined pressure. Multiple pressure gauges 190 may also be provided. The controller 400 may then provide feedback control of the gas supply amount so that the internal space 110 of the cylinder 100 has a desired pressure distribution in the Z direction.

[0040] Figure 3 is a flowchart showing an example of a method for producing soy meat using a twin-screw extruder 1. First, the heater 180 heats the cylinder 100 zone by zone (S11). That is, the controller 400 controls the heater 180 so that each of the containers 101 to 109 is heated to a set temperature. Once the containers 101 to 109 have been heated to a predetermined set temperature, the feeder 200 supplies the raw material into the cylinder 100 (S12). That is, the feeder 200 introduces the raw material into the internal space 110 of the cylinder 100 from the raw material supply port 120. Furthermore, the liquid supply mechanism 300 supplies liquid into the cylinder 100 (S13). That is, the liquid supply mechanism 300 introduces water into the internal space 110 of the cylinder 100 from the liquid supply port 130. Here, the raw material and water are supplied in a supply ratio of 60% raw material and 40% water.

[0041] The raw material and water are mixed and conveyed by the rotation of the two screws 151 and 152 (S14). Screw motors 161 and 162 rotate screws 151 and 152 at a constant rotational speed. As a result, the raw material is conveyed in the +Z direction while being mixed with water. Furthermore, since cylinder 100 is heated, the raw material and water are heated. Therefore, the powder of the raw material reacts. At this time, the internal space 110 may be pressurized by supplying gas into cylinder 100. This pressurizes the internal space 110, thereby promoting the reaction.

[0042] Furthermore, in region A3, cylinder 100 is heated to a maximum temperature of 150°C. Thus, the mixture of liquid and water is heated and kneaded (S15). This causes the proteins in the mixture to fibrousize and expand. Next, the mixture is conveyed in the +Z direction by the rotation of screws 151 and 152 and extruded from cylinder 100 (S16). The mixture extruded from die 143 to the outside of cylinder 100 is cooled to room temperature (S17). Here, soy meat is produced as the mixture passes through the cooled die 143. Alternatively, the mixture after passing through die 143 may be cooled on the outside of the twin-screw extruder 1. In other words, the cooling process may be performed outside the twin-screw extruder 1.

[0043] Since the user can set the rotation speed and zone temperature of screws 151 and 152 to arbitrary values, fiberization can be controlled. By adjusting manufacturing parameters such as the cylinder zone temperature, screw rotation speed, and feed ratio, delicious soy meat can be produced. High-quality soy meat can be produced stably. In addition, the use of a twin-screw extruder 1 simplifies the manufacturing equipment. Furthermore, the mixture may be expanded by reduced pressure to induce fiberization.

[0044] The quality of the soy meat changes depending on the temperature of container 109. For example, increasing the temperature of container 109 promotes fiber formation. If the temperature of container 109 is too low, the soy meat will become crumbly, so it is preferable to set the temperature of container 109 to 140°C or higher. On the other hand, if the temperature of container 109 becomes too high, the protein fibers may harden or the protein may burn. Therefore, it is preferable to set the temperature of container 109 to 160°C or lower. Thus, the soy meat may be manufactured with the temperature of container 109, which is the final zone, set between 140°C and 160°C.

[0045] [Examples] The following describes the soy meat samples that were prepared. Here, multiple samples were created by changing the manufacturing parameters. Specifically, six samples were created by changing the temperature of the final stage container 109 by 5°C increments within the range of 120°C to 145°C. Screws 151 and 152 were set to 250 rpm, and the raw material to water supply ratio was 6:4. Figure 4 shows photographs of samples No. 9 to No. 14. Sample No. 9 was prepared at 120°C, sample No. 10 at 125°C, sample No. 11 at 130°C, sample No. 12 at 135°C, sample No. 13 at 140°C, and sample No. 14 at 145°C.

[0046] Note that containers 101 to 104 are at 30°C (room temperature). Container 105 is heated to 80°C. Container 106 is heated to 120°C. Container 107 is heated to 130°C. Container 108 is heated to 150°C.

[0047] By changing the temperature of container 109, changes can be observed in the sample. For example, there are significant differences in fiber formation depending on the temperature. The higher the temperature, the more fibrous the soy meat becomes.

[0048] [Sensory evaluation] Next, we will describe the results of sensory evaluations conducted on multiple samples by changing the manufacturing parameters. Eight samples were prepared by varying the temperature of the final stage container 109 in 5°C increments within the range of 120°C to 155°C. In addition, the temperature of container 108, adjacent to the final stage container 109, was set to 150°C. Screws 151 and 152 were set to 250 rpm, and the raw material to water supply ratio was 6:4.

[0049] The evaluation criteria consisted of eight items: (1) flavor, (2) texture, (3) mouthfeel, (4) elasticity, (5) stringiness, (6) ease of falling apart, (7) moistness, and (8) overall evaluation (deliciousness). Figures 5 to 7 show the results of evaluations by 12 panelists who tasted each sample and evaluated each item. Here, the 12 people gave a score for each evaluation item on a 7-point scale from -3 to +3. Figures 5 to 7 are graphs showing the average scores of the 12 people.

[0050] Figure 5 is a graph showing the evaluation results for the evaluation items (1) flavor, (2) texture, and (3) mouthfeel. Figure 6 is a graph showing the evaluation results for the evaluation items (4) elasticity, (5) stringiness, and (6) ease of crumbling. Figure 7 shows the eight items: (7) moistness and (8) overall evaluation (deliciousness). In each graph, the horizontal axis represents the temperature of container 109, and the vertical axis represents the average score of the evaluation points.

[0051] (1) Regarding flavor, there is no significant difference even when the temperature is changed. (2) Regarding texture, the texture becomes extremely poor at a temperature of 120℃. (3) Regarding mouthfeel, at temperatures below 130℃, the lower the temperature, the crumbly the mouthfeel becomes.

[0052] (4) Regarding elasticity, the higher the temperature, the more elastic it becomes. On the other hand, (6) regarding ease of unraveling, the higher the temperature, the harder it is to unravel. (5) Regarding fibrousness, when the temperature is below 130℃, the fibrousness disappears.

[0053] (7) Regarding moistness, no significant difference was observed even when the temperature was changed. (8) Overall evaluation (deliciousness) yielded generally favorable results.

[0054] Figure 7 shows the evaluation results when the supply ratio of raw materials to water is changed. Here, containers 101 to 104 are at 30°C (room temperature). Container 105 is heated to 80°C. Container 106 is heated to 120°C. Container 107 is heated to 130°C. Container 108 is heated to 150°C. The temperature of container 109 is set to 135°C.

[0055] Three samples were created with raw material-to-water supply ratios of 7:3, 6:4, and 5:5. In Figure 7, the horizontal axis shows the moisture content [%]. The highest evaluation was achieved at a moisture content of 50%, and the lowest evaluation was achieved at a moisture content of 30%. Here, it is preferable to have a water supply ratio of 30% to 80%. In other words, it is preferable to have a raw material-to-water supply ratio of 7:3 to 2:8. This makes it possible to produce high-quality soy meat.

[0056] The present invention has been described in detail above based on embodiments, but it goes without saying that the present invention is not limited to the embodiments already described, and various modifications are possible without departing from the spirit of the invention. [Explanation of Symbols]

[0057] 1. Twin-screw extruder 100 cylinders 101~109 Container 110 Interior space 120 Raw material supply port 130 Liquid supply port 141 Tip flange 142 Breaker Plate 143 Dice 151 Screw 152 Screw 161 Screw motor 162 Screw motor 180 Heater 200 feeders 300 Liquid supply mechanism 400 Controllers AX1 Rotation axis AX2 Rotation axis A1~A4 area

Claims

1. A cylinder provided along the axial direction, comprising a raw material supply port and a liquid supply port, A raw material supply mechanism that supplies raw materials for plant-based protein from the raw material supply port to the cylinder, A liquid supply mechanism that supplies a liquid to be mixed with the raw material into the cylinder from the liquid supply port, Two screws are rotatably installed inside the cylinder and mix the raw material and the liquid, A drive mechanism that drives the two screws mentioned above, The heaters for heating the cylinder are divided into multiple zones in the axial direction, The system includes a controller that controls the heater for each of the zones. Twin-screw extruder.

2. The twin-screw extruder according to claim 1, wherein the temperature of the final stage zone located furthest downstream in the conveying direction is lower than the temperature of the zone adjacent to the final stage.

3. The twin-screw extruder according to claim 2, wherein the temperature gradually increases from the zone where the liquid supply port is located toward the zone adjacent to the final stage.

4. The twin-screw extruder according to claim 2, wherein the temperature of the final stage zone is 120°C or higher and 155°C or lower.

5. The twin-screw extruder according to claim 2, wherein the temperature of the zone adjacent to the final stage is 120°C or higher and 155°C or lower.

6. A twin-screw extruder according to any one of claims 1 to 5, wherein the supply ratio of the liquid is 30% or more and 80% or less.

7. A twin-screw extruder according to any one of claims 1 to 5, wherein the supply position of the raw material and the supply position of the liquid are variable in the axial direction.

8. The steps include: heating the cylinder in multiple zones along its axial direction; The steps include supplying the raw material for plant tissue protein to the cylinder, The steps include supplying liquid to the cylinder, The steps include: rotating two screws installed in the cylinder to mix the raw material and the liquid while conveying them through the internal space of the cylinder; The process includes the step of extruding a mixture of the raw material and the liquid from the tip of the cylinder. A method for producing plant-derived tissue proteins.

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