A reciprocating bending rice noodle strand machine

Abstract

This invention relates to the field of rice noodle processing technology, and in particular to a reciprocating bending and loosening rice noodle machine. By optimizing the structure and steering layout of the loosening roller group, it achieves integrated operation of continuous conveying, reciprocating bending, and damage-free uniform loosening of rice noodle cloth. It adopts a vertical top-to-bottom straight material feeding method. The rice noodle cloth is subjected to the dual action of its own weight and the downward biting force of the loosening roller group throughout the process. The force direction is always downward, and the movement direction of each loosening roller group in the biting area is uniformly downward. The reversal only changes the bending direction and does not change the feeding direction. The continuity and stability of the conveying are far superior to the horizontal loosening structure. Different heights form staggered bending points. With the opposite steering of adjacent roller groups, the rice noodle cloth is bent layer by layer, alternately, and reciprocally left and right during the downward process, and the rice noodle cloth is loosened in layers throughout the entire area. The uniformity and thoroughness of loosening are impossible to achieve with horizontal loosening. Moreover, the vertically stacked compact layout of multiple loosening roller groups greatly reduces the horizontal footprint of the equipment.

Description

Technical Field

[0001] This invention relates to the field of rice noodle processing technology, and in particular to a reciprocating bending rice noodle loosening machine. Background Technology

[0002] As a traditional staple food in my country, rice noodles are produced in a large-scale industrial process. After being extruded, steamed, and aged, they form a continuous strip of rice noodle cloth. The noodles are tightly packed together and stick together. If they are not properly loosened, it will directly affect the subsequent drying, packaging, cooking taste and the quality of the finished product. Therefore, loosening the noodles is an indispensable key process in the production and processing of rice noodles.

[0003] Traditional rice noodle loosening equipment and processes on the market have many shortcomings and are difficult to adapt to the demands of modern, efficient, and high-quality production. In the early days, rice noodle loosening relied heavily on manual combing and pulling to separate the noodles. This was not only labor-intensive, inefficient, and costly, but also difficult to control the force applied by the workers, which easily led to problems such as tearing, uneven loosening, and sticky residue of the noodles. In addition, manual intervention also affected the hygiene of the production environment and did not comply with standardized food production regulations.

[0004] In existing patents, the applicant filed a Chinese patent application on December 31, 2016, with application number 201621485838.5, disclosing a rice noodle loosening machine, including a conveyor chain and a first drive mechanism for driving the conveyor chain. Above the conveyor chain are several sets of main pressure rollers, auxiliary pressure rollers corresponding to the main pressure rollers, and a second drive mechanism for driving the main pressure rollers downward. The sides of the main pressure rollers and the sides of the auxiliary pressure rollers are both wavy, including main wavy protrusions and wavy depressions. The main wavy protrusions of the main pressure rollers are corresponding to the wavy depressions of the auxiliary pressure rollers, and the wavy depressions of the main pressure rollers are corresponding to the main wavy protrusions of the auxiliary pressure rollers. The sides of the main wavy protrusions are provided with several secondary wavy protrusions arranged in a wavy structure. Another Chinese patent application with application number 202223346679.9 discloses a rice noodle loosening machine that prevents rice noodle breakage. The machine includes a first fixed frame, a rice noodle washing tank, a second fixed frame, a conveyor chain, and a loosening mechanism. The washing tank is located on the upper part of the first fixed frame and is a rectangular cavity structure open at both ends. The second fixed frame is located at one end of the washing tank, and the conveyor chain is located on the upper part of the second fixed frame. The loosening mechanism is located inside the washing tank and includes a conveyor belt, a lower guide roller, an upper guide roller, a drive box, and a water pipe. The drive box contains a conveyor belt, with a lower guide roller and an upper guide roller at its upper and lower ends, respectively. One end of the lower and upper guide rollers is connected to the drive box via a connector. A connecting frame is located on the upper part of the drive box, and the upper part of the connecting frame is connected to an external water source via a water pipe.

[0005] Both patents employ a horizontal loosening method, where the rice noodle cloth moves horizontally and unidirectionally. The cloth passively moves by relying on the friction of the rollers, which can easily lead to slippage, stagnation, reverse retreat, and powder / material blockage, thus disrupting continuous production. Horizontal loosening relies on horizontal pulling, crushing, and unidirectional hard combing, which can cause uneven horizontal force on the rice noodle cloth. The flexible rice noodle cloth is prone to stretching, tearing, and deformation, resulting in a high scrap rate. Furthermore, the horizontal loosening structure is limited by space. To achieve multi-level loosening, the rollers need to be arranged horizontally, resulting in a large equipment footprint, low workshop space utilization, and an unsatisfactory loosening effect.

[0006] Therefore, the defects are very obvious, and a solution is urgently needed. Summary of the Invention

[0007] In order to solve the above-mentioned technical problems, the purpose of this invention is to provide a reciprocating bending rice noodle loosening machine.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: A reciprocating bending rice noodle loosening machine includes a rotation drive mechanism, two parallel support plates, and multiple loosening rollers arranged linearly from top to bottom and rotatably positioned between the two support plates. Each loosening roller assembly includes an active loosening roller rotatably connected between the two support plates and a driven loosening roller rotatably positioned between the two support plates and parallel to the active loosening roller. A loosening gap is formed between the active and driven loosening rollers. The rotation drive mechanism drives the active loosening rollers of all the loosening roller assemblies to rotate. The structure of the active loosening roller is the same as that of the driven loosening roller. The peripheral walls of the active loosening roller and the driven loosening roller... The peripheral sidewalls are evenly spaced with multiple loosening teeth, and two adjacent loosening teeth form loosening tooth grooves. In the same group of loosening rollers, the loosening teeth of the active loosening roller mesh with the loosening teeth of the driven loosening roller. The rotation direction of the active loosening roller is opposite to that of the driven loosening roller. The loosening teeth of the active loosening roller can cooperate with the loosening tooth grooves of the driven loosening roller. The linear speed of multiple groups of loosening rollers is equal when meshing. The active loosening rollers of two adjacent groups of loosening rollers rotate in opposite directions. The multiple groups of loosening rollers reciprocate and bend the rice noodle cloth passing through the loosening gap at different positions in the vertical direction and convey the rice noodle cloth downwards.

[0009] Furthermore, in the same group of loosening rollers, the axis of the active loosening roller and the axis of the driven loosening roller are on the same horizontal plane; the diameter, number of teeth, and rotational speed of the active loosening rollers in all loosening roller groups are equal; the axes of the active loosening rollers in multiple loosening roller groups are on the same vertical line, and the multiple loosening roller groups are distributed at equal intervals.

[0010] Furthermore, the bottom of the loose wire tooth groove is arc-shaped, and the tips of the loose wire teeth are rounded.

[0011] Furthermore, the minimum center distance between the active loosening rollers of two adjacent loosening roller groups: A min =D+2h+△; Maximum center distance between the active loosening rollers of two adjacent loosening roller groups: A max ≤2.5D; Net tooth tip spacing: L=AD, and L≥(1.2~1.5)t; where, D: tooth tip circle diameter of loosening teeth; h: tooth height; A: center distance between the axes of two adjacent loosening roller groups; L: net tooth tip spacing of loosening teeth of two adjacent loosening roller groups; △: tooth tip safety clearance; t: thickness of rice flour cloth.

[0012] Furthermore, the loosening roller assembly also includes two sliders that are slidably connected to the two support plates and arranged opposite to each other, with the two ends of the driven loosening roller rotatably connected to the two sliders respectively.

[0013] Furthermore, the loosening roller assembly also includes a spacing adjustment mechanism mounted on the support plate and used to drive the two sliders to move synchronously closer to or further away from the active loosening roller.

[0014] Furthermore, the slider is equipped with a guide rod, and the support plate has a guide groove, in which the guide rod is slidably disposed.

[0015] Furthermore, both support plates are fitted with first bearings, and the two ends of the active loosening roller are respectively inserted into the inner rings of the two first bearings. The slider is fitted with second bearings, and the two ends of the driven loosening roller are respectively inserted into the inner rings of the two second bearings.

[0016] Furthermore, the gap between loose fibers is greater than the thickness t of the rice flour cloth, and the gap between loose fibers = (1.2~1.5)t.

[0017] Furthermore, the rotary drive mechanism drives the active loosening roller to reciprocate; in each reciprocating rotation of the active loosening roller, the rotation angle by which the active loosening roller drives the rice noodle cloth forward is greater than the rotation angle by which the active loosening roller drives the rice noodle cloth backward.

[0018] The beneficial effects of this invention are as follows: By optimizing the structure and steering layout of the loosening roller group, this application achieves an integrated operation of continuous conveying, reciprocating bending, and damage-free uniform loosening of rice noodle cloth. It adopts a vertical, top-to-bottom straight feeding method, where the rice noodle cloth is subjected to both its own weight and the downward biting force of the loosening roller group throughout the entire process. The force direction is consistently downward, and the movement direction of each loosening roller group's biting area is uniformly downward. Reversing direction only changes the bending direction, not the feeding direction, completely eliminating problems of backtracking, stagnation, and powder accumulation. The continuity and stability of the conveying are far superior to the horizontal loosening structure, making it suitable for uninterrupted production lines. Different heights create staggered bending points, and with the reverse steering of adjacent roller groups, the rice noodle cloth is bent layer by layer, alternately, and reciprocally left and right during its descent, achieving layered loosening of the entire rice noodle cloth. The uniformity and thoroughness of loosening are unattainable with horizontal loosening. Furthermore, the vertically stacked compact layout of multiple loosening roller groups significantly reduces the horizontal footprint of the equipment. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the cross-sectional structure of the present invention.

[0020] Figure 2 This is a side view of the present invention.

[0021] Figure 3 This is a schematic diagram of the structure of the rice flour cloth after repeated bending and loosening of the fibers in this embodiment.

[0022] Explanation of reference numerals in the attached figures: 1. Support plate; 2. Loosening roller assembly; 3. Active loosening roller; 4. Driven loosening roller; 5. Loosening gap; 6. Loosening teeth; 7. Loosening tooth groove; 8. Slider; 9. Gap adjustment mechanism; 10. First bearing; 11. Second bearing; 12. Guide rod; 13. Guide groove. Detailed Implementation To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments and accompanying drawings. The content mentioned in the embodiments is not intended to limit the present invention.

[0023] like Figures 1 to 3 As shown, the present invention provides a reciprocating bending rice noodle loosening machine, which includes a rotation drive mechanism (not shown in the figure), two parallel support plates 1, and multiple loosening roller groups 2 arranged in a straight line from top to bottom and rotatably disposed between the two support plates 1. The loosening roller group 2 includes an active loosening roller 3 rotatably connected between the two support plates 1 and a driven loosening roller 4 rotatably disposed between the two support plates 1 and parallel to the active loosening roller 3. A loosening gap 5 is formed between the active loosening roller 3 and the driven loosening roller 4. The rotation drive mechanism is used to drive the active loosening roller 3 of all loosening roller groups 2 to rotate. The structure of the active loosening roller 3 is the same as the structure of the driven loosening roller 4. The peripheral wall of the active loosening roller 3... Multiple loosening teeth 6 are evenly spaced on the peripheral sidewall of the driven loosening roller 4, and two adjacent loosening teeth 6 form loosening tooth grooves 7. In the same group of loosening rollers 2, the loosening teeth 6 of the active loosening roller 3 mesh with the loosening teeth 6 of the driven loosening roller 4. The rotation direction of the active loosening roller 3 is opposite to that of the driven loosening roller 4. The loosening teeth 6 of the active loosening roller 3 can cooperate with the loosening tooth grooves 7 of the driven loosening roller 4. The linear velocities of the multiple groups of loosening rollers 2 are equal when meshing. The active loosening rollers 3 of two adjacent groups of loosening rollers 2 rotate in opposite directions. The multiple groups of loosening rollers 2 reciprocate and bend the rice noodle cloth passing through the loosening gap 5 at different positions in the vertical direction and convey the rice noodle cloth downward.

[0024] In practical applications, the rotary drive mechanism drives multiple sets of loosening rollers 2 to rotate. Since the active loosening rollers 3 of two adjacent sets of loosening rollers 2 rotate in opposite directions, in the same set of loosening rollers 2, the loosening teeth 6 of the active loosening roller 3 mesh with the loosening teeth 6 of the driven loosening roller 4. The rotation direction of the active loosening roller 3 is opposite to that of the driven loosening roller 4. Therefore, when the rice noodle cloth is located in the loosening gap 5, the active loosening roller 3 and the driven loosening roller 4 rotating in opposite directions in the same set of loosening rollers 2 not only bend the rice noodle cloth, but also convey the rice noodle cloth downward. Since the multiple sets of loosening rollers 2 rotate alternately, the bending points of each set of loosening rollers 2 are staggered vertically. The linear speed of the multiple sets of loosening rollers 2 is equal when meshing. Therefore, the multiple sets of loosening rollers 2 can continuously convey the rice noodle cloth downward and bend it left and right at different positions without pulling the rice noodle cloth, so as to achieve the effect of conveying and loosening the rice noodle cloth. It should be noted that the alternating rotation of multiple sets of loosening rollers 2 only changes the bending posture of the rice noodle cloth, achieving reciprocating bending. The multiple sets of loosening rollers 2 are arranged vertically, with the force direction always downwards. The two loosening rollers in the same set of loosening rollers 2 rotate in opposite directions, and the movement direction of the interlocking area of ​​each set of loosening rollers 2 is uniformly downwards, ensuring that the rice noodle cloth will only continuously move downwards without reversing or stopping. For example, if the rice noodle cloth is a flexible strip material that continuously passes through multiple sets of loosening rollers 2, taking three sets of loosening rollers 2 as an example: Set 1: Active loosening roller 3 clockwise → Driven loosening roller 4 counterclockwise; Set 2: Active loosening roller 3 counterclockwise → Driven loosening roller 4 clockwise; Set 3: ... Group: Active loosening roller 3 clockwise → Driven loosening roller 4 counterclockwise; When passing through the first group, the loosening roller group 2 clamps the rice noodle cloth (for example: the loosening teeth 6 of the active loosening roller 3 and the loosening teeth 7 of the driven loosening roller 4 cooperate) and moves downward, causing the rice noodle cloth to bend to one side; Entering the second group with the opposite direction, the clamping force direction is reversed (for example: the loosening teeth 7 of the active loosening roller 3 and the loosening teeth 6 of the driven loosening roller 4 cooperate), and the rice noodle cloth forms a reverse bend at a new height; The third group changes direction again, changing the bending direction again, and so on, alternating directions, using the staggered rotation of the upper and lower loosening roller groups 2 to make the rice noodle cloth bend repeatedly at different heights, and continuously conveying the rice noodle cloth downward.

[0025] This application achieves integrated operation of continuous conveying, reciprocating bending, and lossless uniform loosening of rice noodle cloth by optimizing the structure and steering layout of the loosening roller group 2. It adopts a vertical, top-to-bottom straight feeding method, where the rice noodle cloth is subjected to both its own weight and the downward biting force of the loosening roller group 2 throughout the entire process. The force direction is consistently downward, and the movement direction of each loosening roller group 2 in the biting area is uniformly downward. Reversing direction only changes the bending direction, not the feeding direction, completely eliminating problems of backtracking, stagnation, and powder accumulation. The continuity and stability of the conveying are far superior to horizontal loosening structures, making it suitable for uninterrupted production lines. Different heights create staggered bending points, and with the reverse steering of adjacent roller groups, the rice noodle cloth is allowed to bend layer by layer, alternately, and reciprocally left and right during the downward movement, achieving layered loosening of the entire rice noodle cloth. This completely breaks down the adhesion of the rice noodles from the surface to the interior, eliminating any loosening blind spots. The uniformity and thoroughness of loosening are unattainable with horizontal loosening. Furthermore, the vertically stacked compact layout of multiple loosening roller groups 2 significantly reduces the horizontal footprint of the equipment.

[0026] In this embodiment, within the same group of loosening rollers 2, the axis of the active loosening roller 3 and the axis of the driven loosening roller 4 are on the same horizontal plane; the diameter, number of teeth, and rotational speed of the active loosening rollers 3 in all loosening roller groups 2 are equal; the axes of the active loosening rollers 3 in multiple loosening roller groups 2 are on the same vertical line, and the multiple loosening roller groups 2 are evenly spaced; specifically, the rotation drive mechanism drives the active loosening rollers 3 of two adjacent loosening roller groups 2 to rotate in opposite directions through a gear set. This structural design ensures that the linear speed of multiple loosening roller groups 2 is equal when meshing. When the rice noodle cloth is reciprocated through bending and loosening and conveyed downwards, the rice noodle cloth is not stretched or pulled throughout the process, resulting in good loosening stability and loosening effect, and ensuring that the movement trajectory of the rice noodle cloth is straight and does not deviate.

[0027] In this embodiment, the bottom of the loosening tooth groove 7 is arc-shaped, and the tip of the loosening tooth 6 is rounded. This structural design makes the cooperation between the loosening tooth groove 7 and the loosening tooth 6 not only conducive to better loosening of the rice noodles, but also less likely to cut or scratch the surface of the rice noodles / tear the rice noodle cloth, and less likely to cause broken noodles, broken edges and crumbs.

[0028] In this embodiment, the minimum center distance of the active loosening rollers 3 of two adjacent loosening roller groups 2 is: Amin = D + 2h + Δ; the maximum center distance of the active loosening rollers 3 of two adjacent loosening roller groups 2 is: Amax ≤ 2.5D; the net tooth tip spacing is: L = AD, and L ≥ (1.2 ~ 1.5)t; where, D: the tooth tip circle diameter of the loosening tooth 6; h: the tooth height of the loosening tooth 6; A: the vertical center distance of the axis of two adjacent loosening roller groups 2; L: the net tooth tip spacing of the loosening tooth 6 of two adjacent loosening roller groups 2 (the lowest point of the previous loosening roller group 2 → the highest point of the next loosening roller group 2); Δ: the tooth tip safety clearance (to prevent friction / interference, usually 5 ~ 10 mm); t: the thickness of the rice flour cloth. This structural design ensures that the loosening teeth 6 of the two adjacent loosening roller groups 2 do not collide or interfere with each other, so that the rice flour cloth can be effectively bent between the two loosening roller groups 2, achieving reciprocating bending and improving the loosening effect.

[0029] For example: Tooth tip circle diameter D=100mm; Tooth height h=8mm; Tooth tip safety clearance Δ=8mm; Thickness of regular rice noodle cloth t=2~4mm; Minimum axis distance between the active loosening rollers 3 of two adjacent loosening roller groups 2: Amin=100+2×8+8=124mm; Minimum net tooth tip distance between the loosening teeth 6 of two adjacent loosening roller groups 2: L≥1.5×2=3mm and L≥2×4=8mm, take L≥8mm; Maximum axis distance (bending limit) between the active loosening rollers 3 of two adjacent loosening roller groups 2: Amax=2.5×100=250mm; Range of vertical center distance between the axes of two adjacent loosening roller groups 2: 124mm≤A≤250mm; Net tooth tip distance L is always greater than the thickness t of the rice noodle cloth to avoid squeezing and damaging the material.

[0030] Specifically, the tooth surface of the loose tooth 6 is provided with knurling or rubber coating to increase friction and transport by friction, without relying on the hard pulling of the loose tooth 6.

[0031] Specifically, the rotary drive mechanism drives the active loosening roller 3 to reciprocate. In each reciprocating rotation of the active loosening roller 3, the rotation angle by which the active loosening roller 3 drives the rice noodle cloth forward is greater than the rotation angle by which the active loosening roller 3 drives the rice noodle cloth backward. In practical applications, the active loosening roller 3 no longer rotates continuously in one direction, but instead oscillates in a clockwise → counterclockwise → clockwise cycle. Each group of driven loosening rollers 4 rotates synchronously in the opposite direction according to the meshing relationship. The meshing area can still hold the rice noodle cloth. The multiple groups of loosening rollers 2 still maintain the rule of alternating direction between groups. After superimposed reciprocating oscillation, the rice noodle cloth completes reciprocating bending and back-and-forth rubbing at different heights simultaneously, achieving double loosening and a better loosening effect. It can also rely on the angle difference of advance angle > retreat angle to form a net downward displacement, ensuring continuous downward conveying. For example, in one reciprocating rotation, the clockwise rotation angle of the active loosening roller 3 is greater than its counterclockwise rotation angle.

[0032] In this embodiment, the loosening roller assembly 2 further includes two sliders 8 slidably connected to two support plates 1 and arranged opposite to each other. The two ends of the driven loosening roller 4 are rotatably connected to the two sliders 8 respectively. The loosening roller assembly 2 also includes a spacing adjustment mechanism 9 mounted on the support plate 1 and used to drive the two sliders 8 to move synchronously closer to or away from the active loosening roller 3. In practical applications, depending on the thickness of the rice flour cloth, the spacing adjustment mechanism 9 drives the two sliders 8 to move synchronously closer to or away from the active loosening roller 3, that is, the driven loosening roller 4 moves closer to or away from the active loosening roller 3, so as to adjust the spacing between the driven loosening roller 4 and the active loosening roller 3, thereby adjusting the size of the loosening gap 5. It has good versatility and strong practicality.

[0033] In this embodiment, the slider 8 is equipped with a guide rod 12, and the support plate 1 has a guide groove 13. The guide rod 12 is slidably disposed in the guide groove 13. During the process of the spacing adjustment mechanism 9 driving the two sliders 8 to move back and forth, the guide rod 12 and the guide groove 13 slide together to improve the movement stability of the sliders 8, thereby improving the movement stability of the driven loosening roller 4.

[0034] In this embodiment, both support plates 1 are fitted with first bearings 10. The two ends of the active loosening roller 3 are respectively inserted into the inner rings of the two first bearings 10. The slider 8 is fitted with second bearings 11, and the two ends of the driven loosening roller 4 are respectively inserted into the inner rings of the two second bearings 11. This structural design facilitates the stable and smooth rotation of the active loosening roller 3 relative to the support plate 1, and facilitates the stable and smooth rotation of the driven loosening roller 4 relative to the slider 8.

[0035] In this embodiment, the gap 5 between the loose fibers is greater than the thickness t of the rice noodle cloth, and the gap 5 is equal to (1.2~1.5)t. With this structural design, the loose fiber teeth 6 will not forcefully compress the rice noodle cloth, and it is not easy to cause the rice noodle cloth to break or deform. This ensures that the rice noodle cloth is held, moved, and bent by the loose fiber teeth 6 within the gap 5 between the loose fibers.

[0036] All technical features in this embodiment can be freely combined according to actual needs.

[0037] The above embodiments are preferred implementations of the present invention. In addition, the present invention can be implemented in other ways. Any obvious substitutions without departing from the concept of the present technical solution are within the protection scope of the present invention.

Claims

1. A reciprocating bending rice noodle strand making machine, characterized in that: The assembly includes a rotation drive mechanism, two parallel support plates (1), and multiple sets of loosening rollers (2) arranged in a straight line from top to bottom and rotatably positioned between the two support plates (1). Each loosening roller set (2) includes an active loosening roller (3) rotatably connected between the two support plates (1) and a driven loosening roller (4) rotatably positioned between the two support plates (1) and parallel to the active loosening roller (3). A loosening gap (5) is formed between the active loosening roller (3) and the driven loosening roller (4). The rotation drive mechanism is used to drive the active loosening rollers (3) of all the loosening roller sets (2) to rotate. The structure of the active loosening roller (3) is the same as that of the driven loosening roller (4). The peripheral sidewalls of the active loosening roller (3) and the peripheral sidewalls of the driven loosening roller (4) are convex at equal intervals. Multiple loosening teeth (6) are provided, and two adjacent loosening teeth (6) form loosening tooth grooves (7); in the same loosening roller group (2), the loosening teeth (6) of the active loosening roller (3) mesh with the loosening teeth (6) of the driven loosening roller (4), the rotation direction of the active loosening roller (3) is opposite to the rotation direction of the driven loosening roller (4), and the loosening teeth (6) of the active loosening roller (3) can cooperate with the loosening tooth grooves (7) of the driven loosening roller (4); the linear velocity of the multiple loosening roller groups (2) is equal when meshing; the active loosening rollers (3) of the two adjacent loosening roller groups (2) rotate in opposite directions; the multiple loosening roller groups (2) reciprocate bending positions of the rice noodle cloth passing through the loosening gap (5) in the vertical direction are different and the rice noodle cloth is conveyed downward.

2. The reciprocating bending rice noodle strand making machine according to claim 1, characterized in that: In the same group of loosening rollers (2), the axis of the active loosening roller (3) and the axis of the driven loosening roller (4) are on the same horizontal plane; the diameter, number of teeth and rotation speed of the active loosening roller (3) of all loosening roller groups (2) are equal; the axis of the active loosening roller (3) of multiple loosening roller groups (2) is on the same vertical line, and the multiple loosening roller groups (2) are distributed at equal intervals.

3. The reciprocating bending rice noodle strand making machine according to claim 2, characterized in that: The bottom of the loose tooth groove (7) is arc-shaped, and the tip of the loose tooth (6) is rounded.

4. The reciprocating bending rice noodle strand making machine according to claim 3, characterized in that: Minimum center distance between the active loosening rollers (3) of two adjacent loosening roller groups (2): A min =D+2h+△; The maximum center distance between the active loosening rollers (3) of two adjacent loosening roller groups (2): A max ≤2.5D; Net tooth tip spacing: L=AD, and L≥(1.2~1.5)t; where, D: tooth tip circle diameter of loosening tooth (6); h: tooth height; A: center distance between the axes of two adjacent loosening roller groups (2); L: net tooth tip spacing of loosening tooth (6) of two adjacent loosening roller groups (2); △: tooth tip safety clearance; t: thickness of rice flour cloth.

5. The reciprocating bending rice noodle strand making machine according to claim 1, characterized in that: The loosening roller assembly (2) also includes two sliders (8) that are slidably connected to the two support plates (1) and arranged opposite to each other. The two ends of the driven loosening roller (4) are rotatably connected to the two sliders (8).

6. A reciprocating bending rice noodle strand making machine according to claim 5, characterized in that: The loosening roller assembly (2) also includes a spacing adjustment mechanism (9) mounted on the support plate (1) and used to drive the two sliders (8) to move synchronously closer to or further away from the active loosening roller (3).

7. A reciprocating bending rice noodle strand making machine according to claim 5, characterized in that: Both support plates (1) are fitted with first bearings (10), and the two ends of the active loosening roller (3) are respectively inserted into the inner rings of the two first bearings (10). The slider (8) is fitted with second bearings (11), and the two ends of the driven loosening roller (4) are respectively inserted into the inner rings of the two second bearings (11).

8. The reciprocating bending rice noodle strand making machine according to claim 1, characterized in that: The gap between loose fibers (5) is greater than the thickness t of the rice flour cloth; the gap between loose fibers (5) = (1.2~1.5)t.

9. A reciprocating bending rice noodle strand making machine according to claim 5 or 6, characterized in that: The slider (8) is equipped with a guide rod (12), and the support plate (1) has a guide groove (13). The guide rod (12) is slidably disposed in the guide groove (13).

10. A reciprocating bending rice noodle strand making machine according to any one of claims 1 to 8, characterized in that: The rotary drive mechanism drives the active wire loosening roller (3) to reciprocate; In each reciprocating rotation of the active loosening roller (3), the rotation angle by which the active loosening roller (3) drives the rice noodle cloth forward is greater than the rotation angle by which the active loosening roller (3) drives the rice noodle cloth backward.

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