Method for manufacturing dried sweet potato bars, and dried sweet potato bars

Abstract

The objective is to produce a dried sweet potato bar that retains the original flavor of sweet potatoes and also incorporates the flavor of roasted sweet potatoes, and to obtain a dried sweet potato bar. [Solution] A method for manufacturing dried sweet potato bars using only sweet potatoes as raw material, comprising: an aging step S01 in which harvested sweet potatoes are aged for a certain period of time to bring out their sweetness; a roasting step S01 in which the aged sweet potatoes are roasted; a drying step S01 in which the roasted sweet potatoes are dried to make dried sweet potatoes; a steaming step S02 in which the dried sweet potatoes are further steamed to soften them; a paste-making step S02 in which the steamed dried sweet potatoes are processed into a paste; a density adjustment step S03 in which the paste is stirred to make it uniform and adjust its density; and a density strengthening step S04 in which the density-adjusted paste is stretched and molded to strengthen its density.

Description

Technical Field

[0001] The present invention relates to a method for producing dried sweet potato bars and dried sweet potato bars.

Background Art

[0002] Conventionally, a technique for kneading harvested sweet potatoes, adding binders (such as flour and eggs), and producing kneaded sweet potato products is known.

[0003] Patent Document 1 (Japanese Patent Application Laid-Open No. 2023-108335) discloses a technique for providing a method for producing dried sweet potatoes with improved sweetness and flavor. Specifically, it includes a steaming and heating step of steaming and heating sweet potatoes, a peeling step of peeling the heated outer skin of the sweet potatoes, a slicing step of slicing the peeled sweet potatoes, a far-infrared heating step of heating the sliced sweet potatoes with far-infrared rays, a drying step of drying the sweet potatoes heated with far-infrared rays, and a finishing step of pressing the dried sweet potatoes.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, in the conventional processing method of sweet potatoes such as in Patent Document 1, there was no unique natural flavor of roasted sweet potatoes. Also, generally, there was a problem that binders other than sweet potatoes (such as flour and eggs) were mixed in, and the original flavor and sweetness of sweet potatoes could not be obtained.

[0006] This invention was made in view of the above problems, and aims to provide a method for manufacturing dried sweet potato bars using only sweet potatoes, without compromising the original flavor and sweetness, and furthermore, to add the flavor of roasted sweet potatoes, as well as to obtain dried sweet potato bars. [Means for solving the problem]

[0007] The present invention has been made in view of the above problems, and the invention according to claim 1 is a method for manufacturing a dried sweet potato bar using only sweet potatoes as raw material, comprising: a maturation step of maturing harvested sweet potatoes for a certain period of time to bring out their sweetness; a roasting step of roasting the matured sweet potatoes; a drying step of drying the roasted sweet potatoes to make dried sweet potatoes; a steaming step of further steaming the dried sweet potatoes to soften them; a paste-making step of processing the steamed dried sweet potatoes into a paste; a density adjustment step of stirring the paste to make it uniform and adjusting its density; and a density strengthening step of stretching and molding the density-adjusted paste to strengthen its density.

[0008] The invention according to claim 2 is a method for producing a dried sweet potato bar according to claim 1, further comprising a step of promoting saccharification by baking after the density strengthening step.

[0009] The invention according to claim 3 is a method for manufacturing a dried sweet potato bar according to claim 1, further comprising a cutting step of cutting the stretched paste into predetermined sizes.

[0010] The invention according to claim 4 is a method for manufacturing dried sweet potato bars according to claim 1, wherein the stirring is performed using a dedicated stirrer.

[0011] The invention according to claim 5 is a method for manufacturing dried sweet potato bars according to claim 4, wherein the agitator comprises a rotating shaft, a holder supported by the rotating shaft, and a stirring member fixed to the holder.

[0012] The invention according to claim 6 is a method for manufacturing a dried sweet potato bar according to claim 1, wherein the paste is rolled out using a dedicated rolling mill.

[0013] The invention according to claim 7 is a method for manufacturing dried sweet potato bars using only sweet potatoes as raw materials, wherein harvested sweet potatoes are aged for a certain period of time to bring out their sweetness, the aged sweet potatoes are roasted, the roasted sweet potatoes are dried to make dried sweet potatoes, the dried sweet potatoes are further steamed to soften, the steamed dried sweet potatoes are processed into a paste, the paste is stirred to make it uniform and adjust the density, and the density of the density-adjusted paste is stretched and molded to make a dried sweet potato bar. [Effects of the Invention]

[0014] Because it is possible to use only sweet potatoes as the raw material, it is possible to produce dried sweet potato bars that bring out the full flavor and sweetness of the sweet potato, and even add the flavor of roasted sweet potatoes. [Brief explanation of the drawing]

[0015] The drawings illustrate specific embodiments of the present invention, including not only essential components of the invention but also optional and preferred embodiments. [Figure 1] This is a flowchart showing the manufacturing process for dried sweet potato bars. [Figure 2] This is an explanatory diagram illustrating a stirrer. [Figure 3] This is an explanatory diagram (1) illustrating a rolling mill. [Figure 4] This is an explanatory diagram (2) illustrating a rolling mill. [Figure 5] This is an explanatory diagram (3) illustrating a rolling mill. [Figure 6] This is an explanatory diagram showing a cut dried sweet potato bar. [Figure 7] This is an explanatory diagram showing the effects of accelerating the saccharification of dried sweet potato bars through baking. [Modes for carrying out the invention]

[0016] Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. In this example, descriptions of technologies already known are omitted. Also, what is illustrated is a structure and method for embodying the technical idea of the invention, and the technical idea of the present invention is not limited to the following. The technical idea of the present invention can be variously modified within the scope of the matters described in the claims. In particular, it should be noted that the drawings are schematic and different from the actual ones. The embodiments show the most preferred forms of the invention, and the invention is not limited thereto.

[0017] Refer to FIG. 1. It is a flowchart showing a method for manufacturing dried sweet potato bars.

[0018] In step S01, aging, baking, and drying into dried sweet potatoes are performed. The harvested sweet potatoes are aged for a certain period to bring out the sweetness, then made into baked sweet potatoes and then processed into dried sweet potatoes. Here, if the certain period is long, the sweetness increases, and if the certain period is short, the sweetness decreases. That is, it is possible to adjust the sweetness by changing the aging period.

[0019] Also, by making baked sweet potatoes, a unique natural flavor of baked sweet potatoes is added. Here too, by increasing the baking time of the baked sweet potatoes, the baked flavor of the baked sweet potatoes increases, and by shortening the baking time of the baked sweet potatoes, the baked flavor of the baked sweet potatoes can be reduced, so it is possible to adjust the baked flavor by the baking time. To make baked sweet potatoes, methods such as heating directly with fire or heating with far-infrared rays may also be used.

[0020] Furthermore, it is possible to adjust the hardness by drying the baked sweet potatoes. That is, by drying the baked sweet potatoes for a long time, they become hard, and by drying them for a short time, soft dried sweet potatoes can be obtained.

[0021] Step S02 involves steaming and pasteurization. The dried sweet potatoes are further steamed to soften them and then processed into a paste. Steaming softens the dried sweet potatoes, making them easier to pasteurize, and allows the natural flavor to be preserved without damaging the cells and fibers of the dried sweet potatoes.

[0022] In step S03, density adjustment is performed by stirring. Paste 3a is stirred to make it uniform and increase its density.

[0023] Refer to Figure 2. This is a stirrer 1. A dedicated stirrer 1 is used for stirring. The stirrer 1 comprises a container 5, a rotating shaft 7, a holder 9 supported by the rotating shaft 7, and a plurality of stirring members 11 fixed to the holder 9. The container 5 is deep and mortar-shaped, making it easy to stir. The rotating shaft 7 is configured to oscillate while rotating on its own axis. Furthermore, the plurality of stirring members 11 fixed to the holder 9 ensure efficient and proper stirring. The rotational speed and oscillation speed of the rotating shaft 7 are configured to be adjustable.

[0024] Step S04 involves shaping and rolling to increase density. Paste 3b is shaped, and then the rolling technique is used to increase its density. Without using any binders (such as flour or eggs), the dried sweet potato is used alone to form a bar.

[0025] Refer to Figures 3 to 5. A dedicated rolling mill 13 is used to spread the paste 3b. The rolling mill 13 is equipped with a conveyor 15 and compression rollers 17. There are pulleys at both ends of the conveyor 15; one pulley is configured to be rotatable by a motor, while the other pulley is free to rotate. This allows the conveying speed of the conveyor 15 to be adjusted by adjusting the rotation speed of the motor.

[0026] The compression roller 17 is configured to rotate freely and its vertical movement can be controlled, thereby allowing adjustment of the paste thickness. For example, when producing thick sweet potato bars 3d, the compression roller 17 is raised and the conveyor speed 15 is set to a relatively fast speed. On the other hand, when producing thinner sweet potato bars 3c, the compression roller is lowered and the conveyor speed 15 is set to a slower speed.

[0027] The spread-out paste 3b is cut into pieces of a predetermined size. This cutting is also done using a dedicated cutting machine. The cutting machine is equipped with cutting blades and cuts the paste as it is transported on the conveyor belt 15. This cutting may also be done after the paste has been saccharified by baking (steam baking).

[0028] Step S05 involves promoting saccharification through baking (steam baking). When baking the shaped dried sweet potato bars, the moisture contained in the sweet potato is used to slowly steam bake them, further promoting saccharification and bringing out a sweeter taste than regular dried sweet potatoes.

[0029] Refer to Figure 6. The actual color of the dried sweet potato bar 3c before baking (steaming) is closer to yellow. Refer to Figure 7. The actual color of the dried sweet potato bar 3d after baking (steaming) is closer to brown. Utilizing this unique technology, we manufacture "dried sweet potato bars" with a natural sweetness using only dried sweet potatoes as the raw material.

[0030] In summary, the method for manufacturing dried sweet potato bars using only sweet potatoes as raw material involves: aging harvested sweet potatoes for a certain period to bring out their sweetness; roasting the aged sweet potatoes; drying the roasted sweet potatoes to make dried sweet potatoes; further steaming the dried sweet potatoes to soften them; processing the steamed dried sweet potatoes into a paste; stirring the paste to make it uniform and adjusting its density; and finally, stretching and shaping the density-adjusted paste to enhance its density and complete the dried sweet potato bar.

[0031] Although embodiments have been described in detail above, the invention is not limited to any particular embodiment, and various modifications and changes are possible within the scope described in the claims. Furthermore, it is possible to combine all or more of the components of the embodiments described above. [Explanation of Symbols]

[0032] 1. Stirrer 3a Paste 3b Paste 3c Dried sweet potato bar 3D Dried Sweet Potato Bar 5 containers 7 Rotation axis 9 holders 11 Stirring member 13 Rolling mill 15 Conveyor 17 Compression Roller

Claims

1. A method for manufacturing dried sweet potato bars using only sweet potatoes as raw material, The harvested sweet potatoes are aged for a certain period of time to bring out their sweetness, and The process of roasting the aforementioned matured sweet potatoes, The process involves drying the aforementioned roasted sweet potatoes to make dried sweet potatoes, The aforementioned dried sweet potatoes are further steamed to soften them, The process involves processing the steamed dried sweet potato into a paste, The process involves stirring the paste to make it uniform and adjusting its density, and then adjusting the density. A method for producing dried sweet potato bars, comprising a density strengthening step of strengthening the density of the density-adjusted paste by stretching and molding.

2. A method for producing a dried sweet potato bar according to claim 1, further comprising a step of promoting saccharification by baking after the density strengthening step.

3. A method for producing a dried sweet potato bar according to claim 1, comprising a cutting step of cutting the stretched paste into predetermined sizes.

4. The method for producing dried sweet potato bars according to claim 1, wherein the stirring is performed using a dedicated stirrer.

5. The method for manufacturing dried sweet potato bars according to claim 4, wherein the agitator comprises a rotating shaft, a holder supported by the rotating shaft, and a stirring member fixed to the holder.

6. The method for manufacturing a dried sweet potato bar according to claim 1, wherein the paste is rolled out using a dedicated rolling mill.

7. A method for manufacturing dried sweet potato bars using only sweet potatoes as raw material, comprising: aging harvested sweet potatoes for a certain period to bring out their sweetness; roasting the aged sweet potatoes; drying the roasted sweet potatoes to make dried sweet potatoes; further steaming the dried sweet potatoes to soften them; processing the steamed dried sweet potatoes into a paste; stirring the paste to make it uniform and adjusting its density; and stretching and shaping the density-adjusted paste to create a dried sweet potato bar.

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