A method for making a flat bamboo steamer and a steamer structure

Abstract

This invention discloses a method for manufacturing a flat bamboo steamer and its structure, relating to the field of steamer manufacturing technology. The method includes: S1: processing bamboo flat sheets to obtain bamboo yellow side flat sheets and bamboo green side flat sheets; S2: bending the bamboo green side flat sheets to form the outer wall layer of the steamer body and lid, bending the bamboo green or bamboo yellow side flat sheets to form the inner wall layer of the steamer body and lid, and cutting the bamboo yellow side flat sheets to form the bottom of the steamer body; S3: combining the outer wall layer, inner wall layer, and bottom of the steamer body to form the steamer body, and combining the outer wall layer, inner wall layer, and top of the steamer lid to form the steamer lid; S4: fixing the steamer body and lid. In this invention, when using bamboo flat sheets to manufacture the steamer, there is no need for overlapping bamboo strips or cross-bonding the bottom of the steamer, or splicing bamboo strips at the bottom of the steamer. This simplifies the process and improves production efficiency. The uniformity of the wall material properties enhances the overall stability of the steamer structure during alternating hot and cold temperatures. Furthermore, the absence of adhesive layers improves food hygiene and safety.

Description

Technical Field

[0001] This invention relates to the field of steamer manufacturing technology, and in particular to a method for manufacturing a flattened bamboo steamer and its structure. Background Technology

[0002] Bamboo steamers have a long history and hold a place in Chinese culinary culture for their ability to preserve the original flavor of food and prevent steam from flowing back. They are a traditional handicraft and household utensil. For a long time, bamboo steamer making was primarily done by hand, with skilled craftsmen using raw materials such as bamboo strips, bamboo slats, and wood chips, employing methods such as splicing bamboo strips, connecting bamboo nails, bamboo weaving, rattan weaving, and riveting. Currently, there are many types of bamboo steamers on the market, but they mainly suffer from the following problems:

[0003] 1) The bamboo strips used in the wall structure of bamboo steamers are relatively narrow and thin, which means that bamboo strips need to be stacked in the height and thickness directions of the wall (and wood strips may also be combined) during the production of the steamer. This results in a large number of wall layers in the bamboo steamer, requiring more bamboo strip units to be fixed, which is inefficient.

[0004] 2) The bottom of the cage is mostly made of narrow bamboo strips cross-shaped and fixed or spliced ​​with milled bamboo strips. The production process is relatively complicated, mostly made by hand, and the production efficiency is low.

[0005] 3) The bamboo strips used in the steamer have significant differences in material properties such as density and age, which makes the bamboo steamer prone to uneven expansion and contraction during alternating use of hot and cold. This causes delamination between the bamboo strip splices and the wall layers, affecting the overall stability of the steamer structure. At the same time, the glue layer in the spliced ​​bamboo boards is prone to delamination, affecting food hygiene and safety.

[0006] Therefore, there is an urgent need for a method to produce flat bamboo steamers that is highly efficient, stable, and safe for food hygiene. Summary of the Invention

[0007] The purpose of this invention is to provide a method for manufacturing a flat bamboo steamer and a steamer structure to solve the problems existing in the prior art. By using a finished bamboo flat sheet to manufacture the steamer, there is no need to stack bamboo strips and cross-fix the bottom of the steamer or splice bamboo strips at the bottom of the steamer, which improves production efficiency. In addition, it can make the material properties of the wall layer uniform and improve the overall stability. Furthermore, the elimination of splicing avoids the use of glue layers and improves food hygiene and safety.

[0008] To achieve the above objectives, the present invention provides the following solution: The present invention provides a method for manufacturing a flattened bamboo steamer, comprising the following steps:

[0009] S1: Process bamboo spreading boards to obtain bamboo yellow side spreading boards and bamboo green side spreading boards;

[0010] S2: The outer wall layer of the cage body and lid is formed by bending the bamboo green side plate, the inner wall layer of the cage body and lid is formed by bending the bamboo green side plate or the bamboo yellow side plate, and the bottom of the cage body is formed by cutting the bamboo yellow side plate.

[0011] S3: The outer wall layer, inner wall layer and bottom of the cage body are combined to form the cage body, and the outer wall layer, inner wall layer and top of the cage cover are combined to form the cage cover.

[0012] S4: Fix the outer wall layer, inner wall layer and bottom of the cage body, and fix the outer wall layer, inner wall layer and top of the cage cover.

[0013] Preferably, in step S1, the processing method is sawing or planing.

[0014] Preferably, in step S2, automatic bending is used, where one end of the bamboo green side-spreading plate or the bamboo yellow side-spreading plate is circumferentially connected to the rotating disk, and a positioning component is set on the outer periphery of the rotating disk. The rotating disk is driven to rotate the bamboo green side-spreading plate or the bamboo yellow side-spreading plate, and the bamboo green side-spreading plate or the bamboo yellow side-spreading plate is bent into a ring under the constraint of the positioning component and the rotating disk, and then fixed in shape using a fixing component. Alternatively, manual bending is used, where the bamboo green side-spreading plate or the bamboo yellow side-spreading plate is directly bent by hand and fixed in shape using a fixing component.

[0015] Preferably, in step S2, the bottom of the cage is cut into shape using laser cutting technology.

[0016] Preferably, in step S4, the cage body and the cage lid are fixed by rattan weaving.

[0017] The present invention also provides a bending device used in the above method, comprising a first rotating shaft driven by a motor, a rotating disk, a positioning pin, and a positioning element. The first rotating shaft is operatively connected to the rotating disk. The positioning element is disposed on the outer circumferential side of the rotating disk. The distance between the positioning element and the outer circumferential wall of the rotating disk is equal to the thickness of the bamboo green side-spreading plate or the bamboo yellow side-spreading plate. A positioning hole for installing the positioning pin is provided on the outer circumferential wall of the rotating disk. A telescopic rod is disposed in the positioning hole. The top end of the telescopic rod is fixedly connected to the positioning pin. The telescopic rod drives the positioning pin to extend or retract into the positioning hole.

[0018] Preferably, the positioning element is a friction roller, the axis of which is parallel to the axis of the first rotating shaft. Both the friction roller and the first rotating shaft are mounted on a bracket. A second rotating shaft driven by a motor is mounted on the friction roller, and the rotation direction of the second rotating shaft is opposite to that of the first rotating shaft.

[0019] Preferably, the bracket is provided with a connecting rod parallel to the axis of the first rotating shaft, and a V-shaped part is rotatably provided at the end of the connecting rod. The rotatable connection position is the tip of the V-shaped part. One end of the V-shaped part is connected to the positioning part, and the other end is hinged to the telescopic end of the telescopic cylinder. The end of the telescopic cylinder away from the V-shaped part is hinged to the bracket.

[0020] Preferably, a translation disk is slidably sleeved on one end of the rotating disk near the first rotating shaft. The inner diameter of the translation disk is the same as the outer diameter of the rotating disk, and the outer diameter of the translation disk is not greater than the distance between the positioning member and the rotating disk. The translation disk slides on the rotating disk through a telescopic structure.

[0021] The present invention also provides a steamer structure manufactured by the above method, comprising a steamer body and a steamer lid. The steamer body includes an outer wall layer, an upper inner wall layer, a lower inner wall layer, and a steamer bottom. The upper inner wall layer and the lower inner wall layer are arranged vertically within the outer wall layer. The steamer bottom is disc-shaped, with several through holes in the center. The outer edge of the steamer bottom is located between the upper inner wall layer and the lower inner wall layer. The steamer lid includes an outer wall layer and an upper inner wall layer. The cage comprises a wall layer, an inner wall layer under the cover, and an arched cage top. The inner wall layer on the cover and the inner wall layer under the cover are arranged vertically within the outer wall layer of the cover. The outer edge of the cage top is located between the inner wall layer on the cover and the inner wall layer under the cover. The inner wall layer on the cage body extends upward beyond the outer wall layer of the cage body to form an extension section. The outer diameter of the extension section is smaller than the outer diameter of the inner wall layer on the cage body, and the outer diameter of the extension section is equal to the inner diameter of the inner wall layer under the cover and the inner wall layer under the cage body.

[0022] The present invention achieves the following main technical effects compared to the prior art:

[0023] Bamboo planks of a certain thickness are processed to obtain yellow and green side planks. These planks are then directly bent into the inner and outer wall layers of the steamer body and lid. The thickness meets the requirements, eliminating the need for multiple layers. Furthermore, due to the planar structure of the bamboo planks, they can be directly cut and perforated to form the steamer bottom, without the need for overlapping bamboo strips, cross-bonding of the bottom, or splicing of bamboo strips. This simplifies the process and improves production efficiency. Secondly, the inner or outer wall layers formed from the yellow and green side planks belong to the same bamboo plank, avoiding uneven shrinkage and deformation during alternating hot and cold use due to different material properties. This prevents delamination at bamboo splicing points and between wall layers, affecting the overall stability of the steamer structure. Additionally, no adhesive layer is needed for the steamer body and bottom, improving food hygiene and safety.

[0024] Other solutions of the present invention achieve the following technical effects compared with the prior art:

[0025] Bending devices can be used to easily bend the wall layers, improving automation, saving manpower, and increasing production efficiency.

[0026] The extension and retraction of the telescopic cylinder can control the swing of the V-shaped part, thereby adjusting the distance between the positioning part and the rotating disk, so that it can be adapted to unfolding plates of different thicknesses.

[0027] Once the wall layer is successfully bent, the locating pin retracts, and the shaped wall layer can be easily ejected from the rotating plate using the movement of the translation disc, improving operational convenience. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a flowchart of the method for manufacturing a flattened bamboo steamer according to the present invention;

[0030] Figure 2 This is a schematic diagram of the steamer structure of the present invention;

[0031] Figure 3 This is a cross-sectional view of the steamer structure of the present invention;

[0032] Figure 4 This is a front view of the bending device of the present invention;

[0033] Figure 5 This is a left view of the bending device of the present invention;

[0034] Figure 6 This is a top view of the bending device of the present invention;

[0035] The components are as follows: 1. Cage body; 2. Outer wall layer of cage body; 3. Inner wall layer of upper cage body; 4. Inner wall layer of lower cage body; 5. Cage bottom; 6. Cage cover; 7. Outer wall layer of cage cover; 8. Inner wall layer of upper cage cover; 9. Inner wall layer of lower cage cover; 10. Cage top; 11. First rotating shaft; 12. Rotating disk; 13. Positioning pin; 14. Friction roller; 15. Support; 16. Second rotating shaft; 17. V-shaped component; 18. Telescopic cylinder; 19. Translation disk. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] The purpose of this invention is to provide a method for manufacturing a flat bamboo steamer and a steamer structure to solve the problems existing in the prior art. By using a finished bamboo flat sheet to manufacture the steamer, there is no need to stack bamboo strips and cross-fix the bottom of the steamer or splice bamboo strips at the bottom of the steamer, which improves production efficiency. In addition, it can make the material properties of the wall layer uniform and improve the overall stability. Furthermore, the elimination of splicing avoids the use of glue layers and improves food hygiene and safety.

[0038] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0039] Please refer to the following: Figures 1-6 As shown, a method for making a flattened bamboo steamer is provided, including the following steps:

[0040] S1: Process bamboo spreading boards to obtain bamboo yellow side spreading boards and bamboo green side spreading boards. The processing method is sawing or planing. The standard for selecting bamboo spreading boards is: based on the diameter specifications of the cage body 1 and cage cover 6 to be prepared, determine the required length, width and thickness of the inner and outer wall layers of the cage body 1 and cage cover 6 (the selection of thickness depends on the radius of curvature. When the radius of curvature is small, the thicker the thickness, the easier it is to break. Therefore, the selected thickness should not break after being bent to the specified radius of curvature). Select a suitable bamboo spreading board. When selecting bamboo spreading boards, you can directly select an integral bamboo spreading board with a thickness slightly greater than or equal to the required wall layer thickness as a bamboo yellow side spreading board or a bamboo green side spreading board. Process it by sawing or planing to make its specifications correspond to the required wall layer specifications. Alternatively, you can select a thicker bamboo spreading board and cut bamboo yellow side spreading boards and bamboo green side spreading boards corresponding to the required wall layer thickness from the bamboo green side and bamboo yellow side of the bamboo spreading board by sawing or planing. Then, process the length and width of the cut bamboo yellow side spreading boards and bamboo green side spreading boards.

[0041] S2: Bend the bamboo green side-spreading flat plate to form the outer wall layer of the cage body 1 and cage cover 6. Bend the bamboo green side-spreading flat plate or the bamboo yellow side-spreading flat plate to form the inner wall layer of the cage body 1 and cage cover 6. Cut the bamboo yellow side-spreading flat plate to form the cage bottom 5 of the cage body 1. The reason for choosing bamboo yellow side-spreading flat plate and bamboo green side-spreading flat plate for the inner and outer wall layers in this step is that bamboo green side-spreading flat plate has better toughness and strength than bamboo yellow side-spreading flat plate, and can be used as both the outer and inner wall layers. At the same time, in order to improve the material utilization rate, bamboo yellow side-spreading flat plate is used to make the inner wall layer and cage bottom 5. The bending process can be carried out manually or by using machinery. When bending manually, the bamboo green side plate or bamboo yellow side plate is bent by hand and fixed in shape using fasteners. When bending automatically using machinery, one end of the bamboo green side plate or bamboo yellow side plate is circumferentially connected to the rotating disk 12. Positioning components are set on the outer periphery of the rotating disk 12. The rotating disk 12 drives the bamboo green side plate or bamboo yellow side plate to rotate. Under the constraint of the positioning components and the rotating disk 12, the bamboo green side plate or bamboo yellow side plate is bent into a ring and fixed in shape using fasteners. The cutting technology for the cage bottom 5 is laser cutting technology.

[0042] S3: The outer wall layer, inner wall layer and cage bottom 5 of cage body 1 are combined to form cage body 1. The outer wall layer, inner wall layer and cage top 10 of cage cover 6 are combined to form cage cover 6. The inner wall layer is mainly divided into upper inner wall layer and lower inner wall layer. The upper and lower inner wall layers are located inside the outer wall layer, and the edge of cage bottom 5 or cage top 10 is sandwiched between the upper and lower inner wall layers. Cage top 10 needs to be purchased separately or made in a conventional way.

[0043] S4: Use rattan weaving to fix the outer wall layer, inner wall layer and bottom 5 of the cage body 1, and use rattan weaving to fix the outer wall layer, inner wall layer and top 10 of the cage cover 6.

[0044] In step S1, since the thickness of a conventional bamboo spreading board is between 0.5-12mm, after testing, the thickness range of the whole bamboo spreading board selected when it is used as a bamboo yellow side spreading board or a bamboo green side spreading board is between 0.5-3mm. If it is greater than 3mm, it is easy to break when bending. Therefore, bamboo spreading boards with a thickness greater than 3mm should be made by sawing or planing from both sides of the bamboo spreading board to make bamboo yellow side spreading boards and bamboo green side spreading boards.

[0045] In step S2, the fastener can be a pneumatic nail, which is used by firing a pneumatic nail with an air gun to connect and fix the two ends of the bent and pasted bamboo plank.

[0046] In step S2, when cutting the bottom 5 of the cage, the bamboo flat plate is mainly cut into a disc shape, and several through holes are cut on the disc shape as air vents.

[0047] In step S2, if the area of ​​a single bamboo side plate is insufficient to make a disc-shaped cage bottom 5, several bamboo side plates can be spliced ​​together and cut using a laser. The splicing point only needs to make contact. Subsequently, the upper and lower wall layers can be squeezed and connected by rattan weaving to complete the fixation.

[0048] The bamboo yellow side spreading plate and bamboo green side spreading plate referred to in this invention refer to the bamboo green side and bamboo yellow side of a single bamboo spreading plate. With the center line as the dividing line, when the thickness is sufficient, multiple spreading plates of a certain side can be obtained by sawing or planing from one side multiple times.

[0049] When automatic bending is selected, the bending device includes a first rotating shaft 11 driven by a motor, a rotating disk 12, a positioning pin 13, and a positioning element. The first rotating shaft 11 is connected to the rotating disk 12. The positioning element is located on the outer circumference of the rotating disk 12. The distance between the positioning element and the outer circumferential wall of the rotating disk 12 is equal to the thickness of the bamboo green side-spreading plate or the bamboo yellow side-spreading plate. The outer circumferential wall of the rotating disk 12 is provided with a positioning hole for installing the positioning pin 13. A telescopic rod is installed in the positioning hole. The top end of the telescopic rod is fixedly connected to the positioning pin 13. The telescopic rod drives the positioning pin 13 to extend or retract into the positioning hole. The specific bending steps are as follows: the positioning pin 13 is extended by controlling the telescopic rod. A through hole matching the positioning pin 13 is opened at the end of the bamboo spreading plate to be bent, and the positioning pin 13 is inserted into the through hole. The motor is started to drive the first rotating shaft 11 and the rotating disk 12 to rotate. Under the limit of the positioning element, the bending is completed.

[0050] The first rotating shaft 11 can be directly linked to the motor via a coupling, or linked to the motor via a transmission belt.

[0051] Multiple positioning pins 13 can be set, and the position of the positioning pins 13 should avoid the movement path of the positioning component to avoid the situation where the positioning pins 13 protrude from the through hole and interfere with the positioning component when the bamboo flat plate is thin.

[0052] The positioning component is a friction roller 14, whose surface can generate friction with the bamboo spreading board. The axis of the friction roller 14 is parallel to the axis of the first rotating shaft 11. Both the friction roller 14 and the first rotating shaft 11 are mounted on the bracket 15. A second rotating shaft 16 driven by a motor is mounted on the friction roller 14. The rotation direction of the second rotating shaft 16 is opposite to that of the first rotating shaft 11. The friction roller 14 also provides a certain conveying force to the bamboo spreading board, which, together with the rotating disk 12, drives the bamboo spreading board to move.

[0053] The bracket 15 is provided with a connecting rod parallel to the axis of the first rotating shaft 11. The connecting rod has a cylindrical structure. The end of the connecting rod is rotatably provided with a V-shaped part 17 through a bearing, and the rotatable connection position is the tip of the V-shaped part 17. One end of the V-shaped part 17 is connected to the positioning part, and the other end is hinged to the telescopic end of the telescopic cylinder 18. The end of the telescopic cylinder 18 away from the V-shaped part 17 is hinged to the bracket 15. The extension and retraction of the telescopic cylinder 18 can control the swing of the V-shaped part 17, thereby adjusting the distance between the positioning part and the rotating disk 12 so that it can adapt to the unfolding plate of different thicknesses. When the positioning part is adjustable and the positioning part is a friction roller 14, the motor driving the friction roller 14 should be set on the V-shaped part 17 to directly drive the friction roller 14 to rotate.

[0054] To improve the automation level of the device, a translating disc 19 is slidably fitted onto one end of the rotating disk 12 near the first rotating shaft 11. After the translating disc 19 is fitted, the rotating disk 12 should still have enough space to place the bamboo spreading board. The inner diameter of the translating disc 19 is the same as the outer diameter of the rotating disk 12. The outer diameter of the translating disc 19 is not greater than the distance between the positioning member and the rotating disk 12. When the positioning member position is adjustable, the outer diameter of the translating disc 19 should be less than the minimum distance between the positioning member and the rotating disk 12. Alternatively, after the bending is successful, the positioning member can be lifted by the telescopic cylinder 18 first, and then the translating disc 19 can be moved. In this case, the outer diameter of the translating disc 19 is not greater than the maximum distance between the positioning member and the rotating disk 12. The translating disc 19 slides on the rotating disk 12 through the telescopic structure. The telescopic structure can be a pneumatic cylinder, a hydraulic cylinder, or an electric push rod, etc., and the telescopic structure can be set on the bracket 15.

[0055] A one-button ejection function can be provided. This button, along with the telescopic rod controlling the positioning pin 13 and the telescopic structure controlling the translation disc 19, are all electrically connected to the control system. By pressing the button, the telescopic rod controls the positioning pin 13 to retract, and then controls the translation disc 19 to eject the successfully bent bamboo flat panel (the control system can also control the lifting of the positioning component and the retraction of the positioning pin 13 to be synchronized). After the translation disc 19 ejects the bamboo flat panel, the control system controls the translation disc 19 to return to its original position, the positioning component to fall back, and the positioning pin 13 to extend in preparation for the bending of the next bamboo flat panel.

[0056] The steamer structure made by the above method includes a steamer body 1 and a steamer lid 6. The steamer body 1 includes an outer wall layer 2, an upper inner wall layer 3, a lower inner wall layer 4, and a steamer bottom 5. The upper inner wall layer 3 and the lower inner wall layer 4 are arranged vertically inside the outer wall layer 2. The steamer bottom 5 is disc-shaped, with several through holes in the center. The outer edge of the steamer bottom 5 is located between the upper inner wall layer 3 and the lower inner wall layer 4. The steamer lid 6 includes an outer wall layer 7, an upper inner wall layer 8, and a lower inner wall layer 9. Layer 9 and the arched cage top 10, the upper inner wall layer 8 and the lower inner wall layer 9 of the cage cover are distributed vertically within the outer wall layer 7 of the cage cover. The outer edge of the cage top 10 is located between the upper inner wall layer 8 and the lower inner wall layer 9 of the cage cover. The inner wall layer 3 of the cage body extends upward from the outer wall layer 2 of the cage body to form an extension section. The outer diameter of the extension section is smaller than the outer diameter of the inner wall layer 3 of the cage body. The change in outer diameter can be handled by sawing. The outer diameter of the extension section is equal to the inner diameter of the lower inner wall layer 9 of the cage cover and the lower inner wall layer 4 of the cage body.

[0057] Any adaptive changes made according to actual needs are within the scope of protection of this invention.

[0058] It should be noted that, for those skilled in the art, it is obvious that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0059] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A method for making a flattened bamboo steamer, characterized in that, Includes the following steps: S1: Process bamboo spreading plates to obtain bamboo yellow side spreading plates and bamboo green side spreading plates; cut bamboo yellow side spreading plates and bamboo green side spreading plates corresponding to the required wall layer thickness from the bamboo green side and bamboo yellow side of the bamboo spreading plate, and then process the length and width of the cut bamboo yellow side spreading plates and bamboo green side spreading plates. S2: The outer wall layer of the cage body and lid is formed by bending the bamboo green side plate, the inner wall layer of the cage body and lid is formed by bending the bamboo green side plate or the bamboo yellow side plate, and the bottom of the cage body is formed by cutting the bamboo yellow side plate. S3: The outer wall layer, inner wall layer and bottom of the cage body are combined to form the cage body, and the outer wall layer, inner wall layer and top of the cage cover are combined to form the cage cover. S4: The outer wall layer, inner wall layer, and bottom of the cage body are fixed; the outer wall layer, inner wall layer, and top of the cage cover are fixed; the inner wall layer or outer wall layer is formed by bending the bamboo yellow side plate and the bamboo green side plate, and belongs to the same bamboo plate.

2. The method for making a flattened bamboo steamer according to claim 1, characterized in that, In step S1, the processing method is sawing or planing.

3. The method for making a flattened bamboo steamer according to claim 1, characterized in that, In step S2, automatic bending is used, where one end of the bamboo green side plate or bamboo yellow side plate is circumferentially connected to the rotating disk. Positioning components are set on the outer periphery of the rotating disk. The rotating disk drives the bamboo green side plate or bamboo yellow side plate to rotate. Under the constraint of the positioning components and the rotating disk, the bamboo green side plate or bamboo yellow side plate is bent into a ring shape and fixed in shape using fixing components. Manual bending is used, where the bamboo green side plate or bamboo yellow side plate is directly bent by hand and fixed in shape using fixing components.

4. The method for making a flattened bamboo steamer according to claim 1, characterized in that, In step S2, the bottom of the cage is cut into shape using laser cutting technology.

5. The method for making a flattened bamboo steamer according to claim 1, characterized in that, In step S4, the cage body and the cage lid are fixed by rattan weaving.

6. A bending device used in the method for manufacturing a flattened bamboo steamer as described in claim 3, characterized in that, The device includes a first rotating shaft driven by a motor, a rotating disk, a positioning pin, and a positioning component. The first rotating shaft is connected to the rotating disk in a transmission manner. The positioning component is located on the outer circumference of the rotating disk. The distance between the positioning component and the outer circumferential wall of the rotating disk is equal to the thickness of the bamboo green side-spreading plate or the bamboo yellow side-spreading plate. The outer circumferential wall of the rotating disk is provided with a positioning hole for installing the positioning pin. A telescopic rod is provided in the positioning hole. The top end of the telescopic rod is fixedly connected to the positioning pin. The telescopic rod drives the positioning pin to extend or retract into the positioning hole.

7. The bending device according to claim 6, characterized in that, The positioning component is a friction roller, the axis of which is parallel to the axis of the first rotating shaft. Both the friction roller and the first rotating shaft are mounted on a bracket. A second rotating shaft driven by a motor is mounted on the friction roller, and the rotation direction of the second rotating shaft is opposite to that of the first rotating shaft.

8. The bending device according to claim 7, characterized in that, The bracket is provided with a connecting rod parallel to the axis of the first rotating shaft. A V-shaped part is rotatably provided at the end of the connecting rod, and the rotatable connection position is the tip of the V-shaped part. One end of the V-shaped part is connected to the positioning part, and the other end is hinged to the telescopic end of the telescopic cylinder. The end of the telescopic cylinder away from the V-shaped part is hinged to the bracket.

9. The bending device according to claim 6, characterized in that, A translation disk is slidably sleeved on one end of the rotating disk near the first rotating shaft. The inner diameter of the translation disk is the same as the outer diameter of the rotating disk. The outer diameter of the translation disk is not greater than the distance between the positioning member and the rotating disk. The translation disk slides on the rotating disk through a telescopic structure.

10. A steamer structure manufactured using the method for producing a flattened bamboo steamer according to any one of claims 1-5, characterized in that, The cage includes a cage body and a cage cover. The cage body includes an outer wall layer, an upper inner wall layer, a lower inner wall layer, and a cage bottom. The upper inner wall layer and the lower inner wall layer are arranged vertically within the outer wall layer. The cage bottom is disc-shaped with several through holes in the center. The outer edge of the cage bottom is located between the upper inner wall layer and the lower inner wall layer. The cage cover includes an outer wall layer, an upper inner wall layer, a lower inner wall layer, and an arched top. The upper inner wall layer and the lower inner wall layer are arranged vertically within the outer wall layer. The outer edge of the top is located between the upper inner wall layer and the lower inner wall layer. The upper inner wall layer extends upward beyond the outer wall layer to form an extension section. The outer diameter of the extension section is smaller than the outer diameter of the upper inner wall layer and equal to the inner diameters of the lower inner wall layer and the lower inner wall layer.

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