Accurate feeding device for material box and cooking machine

Abstract

The utility model discloses an accurate feeding device for material boxes and a cooking machine. The feeding device comprises a cabinet body, a material box sliding plate arranged on the surface of the cabinet body, a sliding mechanism for driving the material box sliding plate to slide on the surface of the cabinet body, a turnover mechanism for turning over the material boxes and a position monitoring mechanism for detecting the moving positions of the material boxes on the material box sliding plate. The sliding mechanism comprises a sliding block and a driving assembly, the sliding block is fixedly connected with the material box sliding plate, and the driving assembly is used for driving the sliding block to move on the top of the cabinet body so as to drive the material box sliding plate to move on the top of the cabinet body; the position monitoring mechanism comprises a plurality of material box position sensors and induction pieces which are arranged below all the material boxes, one material box position sensor is correspondingly arranged below each material box, all the material box position sensors are arranged on the same horizontal position and arranged in sequence, and the induction pieces are fixedly connected with the sliding blocks. The reliability of the system is improved, faults or errors of a single limiting position detection sensor are avoided, and the cost is lower.

Description

Technical Field

[0001] The utility model relates to the technical field of cooking equipment, in particular to a precise feeding device for a material box and a cooking machine. Background Art

[0002] At present, with the daily needs of modern life and the development of science and technology, various automated equipment that reduce people's workload in life have appeared on the market. The automatic cooking machine is an intelligent cooking device controlled by a microcomputer. It can automatically perform various operations, such as adding ingredients, stir-frying, washing pots, etc., easily realizing the automation of the cooking process.

[0003] The feeding device is an important component of the automatic cooking machine. Usually, a material box is used for feeding. Since the material box cannot support multiple orderly feedings, the user needs to manually put different dishes into the material box or the pot body at different stages of the cooking process. This cannot reflect the unmanned intelligence of the cooking machine and greatly reduces the working efficiency of the cooking machine. To this end, the prior art adds a position detection mechanism that can detect the position of the material box bracket. For details, see Chinese patent CN217659226U. The feeding device mainly includes a cabinet, a material box bracket arranged on the surface of the cabinet, a sliding mechanism that drives the material box bracket to slide on the surface of the cabinet, and a position detection mechanism. The position detection mechanism detects the position of the material box bracket to determine which material box currently carried on the material box bracket corresponds to the feeding station, so that the material box selection of the feeding station can be performed, which is conducive to accurate feeding.

[0004] However, although the feeding device of the above structure solves the problem of automatic feeding to a certain extent, its feeding box still has the following shortcomings in the actual feeding process:

[0005] (1) This technology uses two position sensors, which are respectively set at the extreme positions at the opposite ends of the moving path of the material box holder. This is a single extreme position detection. The feeding process depends on the accuracy and reliability of the sensors at the extreme positions. If the sensors fail or malfunction, the entire system may not be able to correctly locate multiple material box positions, which will cause the feeding operation of the feeding device to fail or be dangerous. The accuracy and repeatability of single extreme position detection may be limited, especially after long-term use, which may lead to positioning errors. Therefore, it is not suitable for applications with high-precision management of multiple material boxes. In order to achieve high-precision positioning of multiple material box positions, single extreme position detection requires the support of complex algorithms and control systems, which means that more software and hardware development work is required, increasing the complexity and cost of the system. In addition, in actual applications, when the flipping motor used to flip the material box or the bracket motor used to drive the material box holder to slide on the cabinet surface is prone to losing steps, or the flipping motor and the bracket motor lose cloth at the same time, the material box on the material box holder fails to arrive at the feeding station as scheduled, and the flipping mechanism has already flipped, causing the material box to easily overturn offside, and the material box may even be knocked over and deviate from the flipping trajectory, causing the food to spill all over the floor.

[0006] (2) In addition, the existing material box holder and the cabinet are connected by relative sliding connection through the design of parallel slide rails and sliders. The above-mentioned sliding connection method is surface contact or line contact, which has a complex structure and high cost. In addition, the fumes generated during the cooking process are easy to adhere to mechanisms such as slide rails and sliders, which is easy to create sanitary dead corners and are not easy to clean. It is easy to cause corrosion of the sliding mechanism in the long term. In addition, if the food or seasoning falls onto the slide rails and other mechanisms during the movement of the material box, it is easy to cause problems such as uneven sliding. These health hazards will affect the service life of the delivery mechanism. Utility Model Content

[0007] In order to overcome the deficiencies of the prior art, one of the purposes of the present invention is to provide a precise feeding device for a material box.

[0008] The second purpose of the utility model is to provide a cooking machine with a precise feeding device for a material box.

[0009] One of the purposes of the utility model is achieved by the following technical solution: a precise feeding device for a material box, comprising a cabinet, a material box sliding plate arranged on the surface of the cabinet, a sliding mechanism for driving the material box sliding plate to slide on the surface of the cabinet, a turning mechanism for turning over the material box located on the feeding station, and a position monitoring mechanism for detecting the moving position of the material box on the material box sliding plate;

[0010] The material box sliding plate is installed on the top of the cabinet and is used to carry multiple material boxes; the sliding mechanism includes a slider and a driving assembly, the slider is fixedly connected to the material box sliding plate, and the driving assembly is used to drive the slider to move on the top of the cabinet to drive the material box sliding plate to move on the top of the cabinet;

[0011] The position monitoring mechanism includes multiple material box position sensors and induction sheets arranged under each material box, a material box position sensor is correspondingly arranged under each material box, and each material box position sensor is arranged at the same horizontal position and arranged in sequence, and the induction sheet is fixedly connected to the slider; when the output walking moving distance of the driving component is completely consistent with the position of the slider detected by each material box position sensor, it is judged that the material box position on the material box sliding plate has completely reached the feeding station, and the flipping mechanism flips the material box.

[0012] Further, the driving assembly includes a first driving wheel and a first driven wheel installed in the cabinet, a first synchronous belt sleeved between the first driving wheel and the first driven wheel, and a material box motor drivingly connected to the first driving wheel;

[0013] The slider is clamped on the first synchronous belt, the sensor sheet is installed at the lower part of the slider, and the end of the sensor sheet extends between the receiver and the transmitter of each material box position sensor; the material box motor rotates, driving the slider and the sensor sheet on the first synchronous belt to move horizontally, and each material box position sensor detects the horizontal sliding distance of the sensor sheet, thereby detecting the moving distance of each material box.

[0014] Furthermore, the sliding mechanism is also arranged on a slide rail at the bottom of the cabinet, and the sliding block is slidably connected to the slide rail and slides along the length direction of the slide rail.

[0015] Furthermore, the material box sliding plate includes a horizontal panel, a first upright side panel arranged on one side of the horizontal panel, and a second upright side panel arranged on the other side of the horizontal panel; a magnet sheet is protruding from the bottom of the material box, and a limiting opening hole matching the shape of the magnet sheet is opened in the middle of the horizontal panel. The material box is placed on the material box sliding plate through the cooperation between the magnet sheet and the limiting opening hole, a plurality of nylon cover nuts are protruding from the bottom of the horizontal panel, the first upright side panel extends downward to one side of the cabinet body, a plurality of nylon cover nuts are arranged on the top of the cabinet body, and the second upright side panel is buckled on the plurality of nylon cover nuts on the cabinet body to realize the sliding limit of the material box sliding plate.

[0016] Furthermore, the flipping mechanism is arranged below the feeding station, and includes a magnetic seat for adsorbing the bottom of the material box, a flipping arm fixedly connected to the magnetic seat, a flipping shaft for installing the flipping arm, and a flipping transmission assembly for driving the flipping shaft to rotate.

[0017] Furthermore, the flip transmission assembly includes a flip motor, a second driving wheel, a second driven wheel, and a second synchronous belt; the second synchronous belt is sleeved between the second driving wheel and the second driven wheel, the second driven wheel is sleeved on the flip shaft, the second driving wheel is sleeved on the power output shaft of the flip motor, and the flip motor drives the flip arm to perform a flipping motion.

[0018] Furthermore, the flip mechanism also includes a flip arm position detection component for detecting the flip position of the flip arm, the flip arm position detection component includes a sensing sheet and a flip arm position sensor, the sensing sheet is sleeved on the flip shaft, the flip arm position sensor is installed in the cabinet, and the sensing sheet extends between the receiver and the transmitter of the flip arm position sensor.

[0019] Furthermore, the number of the material boxes is four, and the number of the material box position sensors is four.

[0020] Furthermore, a mounting frame for installing the sliding mechanism is provided in the cabinet; the material box position sensor is installed on the mounting frame through an adjustment bracket, a first elongated hole is opened on the mounting frame, and the adjustment bracket is opened with a second elongated hole which is perpendicular to the length direction of the first elongated hole.

[0021] The second purpose of the utility model is achieved by the following technical solution: a cooking machine, including a stirring pot, a stirring mechanism arranged above the stirring pot, and the above-mentioned material box precise feeding device arranged on one side of the stirring pot.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] (1) This application can realize double confirmation of position information by setting position sensors under each material box. The first confirmation is to determine the distance traveled by the motor through the pulse control of the stepper motor, thereby determining the distance traveled by the material box sliding plate; the second judgment is to rely on the position sensors under each material box. Each position sensor is evenly distributed on the moving track of the material box sliding plate. Each position can be measured and calibrated independently, which can provide higher position accuracy and ensure that the material box sliding plate has completely reached the target position, thereby improving the reliability of the system, thereby avoiding failure or error of the sensor for single extreme position detection, thereby avoiding incorrect positioning, and at the same time avoiding the phenomenon that the material box is offside and overturned after the motor loses a step, or even is knocked over and deviates from the overturning track, causing the food to spill all over the floor. This design has higher operation accuracy and reliability and lower cost.

[0024] (2) The present application improves the structure of the material box sliding plate by designing upright side panels located on both sides of the horizontal panels on both sides. One side panel is projected on one side of the cabinet, and the other side panel is limited by multiple nylon cover nuts to achieve the limitation of the left and right sides of the material box sliding plate. The middle part of the horizontal panel is supported by a multi-point nylon cover nut, and the line contact sliding between the material box sliding plate and the cabinet in the prior art is improved to point contact sliding. The structure is simple, the sliding is smoother, and there is no mechanical gap. The fumes generated during the cooking process are prevented from easily adhering to mechanisms such as slide rails and sliders, which easily creates sanitary dead corners and is not easy to clean. The sliding mechanism is prone to corrosion in the long run. It will not hide stains and is very convenient to clean, saving time and effort. It also eliminates the defects that affect the service life of components such as food or seasonings falling onto mechanisms such as slide rails during the movement of the material box, resulting in uneven sliding. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a structural schematic diagram of a material box precise feeding device according to a preferred embodiment of the utility model;

[0026] Figure 2 This is a partial structural diagram of a material box precise feeding device of a preferred embodiment of the utility model;

[0027] Figure 3 for Figure 2 The enlarged schematic diagram of point A in the middle;

[0028] Figure 4 This is a partial cross-sectional schematic diagram of a device for accurately feeding a material box according to a preferred embodiment of the utility model;

[0029] Figure 5 This is a partial structural diagram from another angle of the material box precise feeding device of the preferred embodiment of the utility model;

[0030] Figure 6 This is a structural schematic diagram of the material box sliding plate and the turning mechanism of the preferred embodiment of the utility model;

[0031] Figure 7 This is a schematic diagram of the structure of the flipping mechanism of a preferred embodiment of the utility model;

[0032] In the figure: 100, precise feeding device for material box; 1, cabinet; 11, mounting frame; 111, first long strip hole; 12, adjustment bracket; 121, second long strip hole; 2, material box sliding plate; 21, horizontal panel; 211, limit opening; 22, first vertical side plate; 23, second vertical side plate; 24, first nylon cap nut; 25, second nylon cap nut; 3, sliding mechanism; 31, slider; 32, driving assembly; 321, first driving wheel; 322, first driven wheel; 323, first synchronous belt; 324, material box motor; 33, slide rail; 4, flip mechanism; 41, magnetic seat; 42, flip arm; 43, flip shaft; 44, flip transmission assembly; 441, flip motor; 442, second driving wheel; 443, second driven wheel; 444, second synchronous belt; 45, second induction sheet; 46, flip arm position sensor; 5, position monitoring mechanism; 51, material box position sensor; 52, first induction sheet; 6, material box; 61, magnet sheet; 200, stirring pot; 300, stirring mechanism; T, feeding station. DETAILED DESCRIPTION

[0033] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0034] Example 1

[0035] like Figure 1-7 As shown, a material box accurate feeding device 100 includes a cabinet 1, a material box sliding plate 2 arranged on the surface of the cabinet 1, a sliding mechanism 3 for driving the material box sliding plate 2 to slide on the surface of the cabinet 1, a flipping mechanism 4 for flipping the material box located on the feeding station T, and a position monitoring mechanism 5 for detecting the moving position of the material box on the material box sliding plate 2;

[0036] The material box sliding plate 2 is installed on the top of the cabinet and is used to carry multiple material boxes 6; the sliding mechanism 3 includes a slider 31 and a driving assembly 32, the slider 31 is fixedly connected to the material box sliding plate 2, and the driving assembly 32 is used to drive the slider 31 to move on the top of the cabinet 1, so as to drive the material box sliding plate 2 to move on the top of the cabinet 1;

[0037] The position monitoring mechanism 5 includes a plurality of material box position sensors 51 and a first sensing sheet 52 arranged under each material box. A material box position sensor 51 is correspondingly arranged under each material box. The material box position sensors 51 are arranged at the same horizontal position and arranged in sequence. The first sensing sheet 52 is fixedly connected to the slider 31. When the output walking moving distance of the driving component 32 is completely consistent with the position of the slider 31 detected by each material box position sensor 51, it is judged that the material box position on the material box sliding plate 2 has completely reached the feeding position, and the flipping mechanism 4 flips the material box.

[0038] This application can realize double confirmation of position information by setting position sensors under each material box. The first confirmation is to determine the distance traveled by the motor by pulse control of the stepper motor, thereby determining the distance traveled by the material box sliding plate 2; the second judgment is to rely on the position sensors under each material box. Each position sensor is evenly distributed on the moving track of the material box sliding plate 2. Each position can be measured and calibrated independently, which can provide higher position accuracy, ensure that the material box sliding plate 2 has completely reached the target position, and improve the reliability of the system, thereby avoiding the failure or error of the sensor for single extreme position detection, thereby avoiding incorrect positioning, and at the same time avoiding the phenomenon that the material box is offside and overturned after the motor loses steps, or even is knocked over and deviates from the overturning track, and the food spills all over the floor. The operation accuracy and reliability of this design are higher, and the cost is lower.

[0039] As a further preferred solution, the driving assembly 32 includes a first driving wheel 321 and a first driven wheel 322 installed in the cabinet 1, a first synchronous belt 323 sleeved between the first driving wheel 321 and the first driven wheel 322, and a material box motor 324 drivingly connected to the first driving wheel 321;

[0040] The slider 31 is clamped on the first synchronous belt 323, and the first sensor sheet 52 is installed at the lower part of the slider 31. The end of the sensor sheet extends between the receiver and the transmitter of each material box position sensor 51. The material box motor 324 rotates to drive the slider 31 and the first sensor sheet 52 on the first synchronous belt 323 to move horizontally. Each material box position sensor 51 detects the horizontal sliding distance of the first sensor sheet 52, thereby detecting the moving distance of each material box.

[0041] As a further preferred solution, the sliding mechanism 3 is further provided on a slide rail 33 at the bottom of the cabinet 1 , and the slider 31 is slidably connected to the slide rail 33 and slides along the length direction of the slide rail 33 .

[0042] As a further preferred embodiment, the material box sliding plate 2 includes a horizontal panel 21, a first upright side panel 22 arranged on one side of the horizontal panel 21, and a second upright side panel 23 arranged on the other side of the horizontal panel 21; a magnet sheet 61 is protrudingly provided at the bottom of the material box 6, and a limiting opening 211 matching the shape of the magnet sheet is opened in the middle of the horizontal panel 21. The material box is placed on the material box sliding plate 2 through the cooperation between the magnet sheet and the limiting opening, and a plurality of first nylon cover nuts 24 are protrudingly provided at the bottom of the horizontal panel, and the first upright side panel 22 extends downward to one side of the cabinet body 1, and a plurality of second nylon cover nuts 25 are provided on the top of the cabinet body 1, and the second upright side panel is buckled on the plurality of second nylon cover nuts 25 on the cabinet body 1 to realize the sliding limit of the material box sliding plate 2.

[0043] The present application improves the structure of the material box sliding plate 2 by designing upright side panels located on both sides of the horizontal panels 21 on both sides. One side panel is projected on one side of the cabinet 1, and the other side panel is limited by a plurality of nylon cap nuts to achieve the limitation of the left and right sides of the material box sliding plate 2. The middle part of the horizontal panel 21 is supported by a multi-point nylon cap nut, and the line contact sliding between the material box sliding plate 2 and the cabinet 1 in the prior art is improved into point contact sliding. The structure is simple, the sliding is smoother, and there is no mechanical gap, which prevents the fumes generated during the cooking process from easily adhering to mechanisms such as the slide rail 33 and the slider, which easily creates sanitary dead corners and is not easy to clean. It is easy to cause corrosion of the sliding mechanism 3 for a long time, and will not hide stains. It is very convenient to clean, saving time and effort. It also eliminates the defects of the material box falling onto the slide rail and other mechanisms during the movement, causing uneven sliding and affecting the service life of the components.

[0044] As a further preferred embodiment, the flipping mechanism 4 is arranged below the feeding station T, and includes a magnetic seat 41 for adsorbing the bottom of the material box, a flipping arm 42 fixedly connected to the magnetic seat 41, a flipping shaft 43 for installing the flipping arm 42, and a flipping transmission assembly 44 for driving the flipping shaft 43 to rotate.

[0045] As a further preferred embodiment, the flip transmission assembly 44 includes a flip motor 441, a second driving wheel 442, a second driven wheel 443, and a second synchronous belt 444; the second synchronous belt 444 is sleeved between the second driving wheel 442 and the second driven wheel 443, the second driven wheel 443 is sleeved on the flip shaft 43, the second driving wheel 442 is sleeved on the power output shaft of the flip motor 441, and the flip arm is driven by the flip motor 441 to perform a flipping motion.

[0046] As a further preferred solution, the flip mechanism 4 also includes a flip arm position detection component for detecting the flip position of the flip arm, and the flip arm position detection component includes a second induction sheet 45 and a flip arm position sensor 46, wherein the second induction sheet 45 is sleeved on the flip shaft 43, and the flip arm position sensor 46 is installed in the cabinet 1, and the second induction sheet 45 extends between the receiver and the transmitter of the flip arm position sensor 46. The present application designs the flip arm position sensor 46 and adds a detection process for the flip arm flipping, which can effectively avoid improper flipping caused by motor mechanical fatigue.

[0047] As a further preferred embodiment, the number of the material boxes is four, and the number of the material box position sensors 51 is four. The use of four position sensors can provide higher position accuracy, because each position can be measured and calibrated independently, which is very important for applications requiring high precision. The four position sensors can provide fault tolerance for the system, and even if one position sensor fails, the correct position positioning can still be performed. This improves the stability and maintainability of the system. In summary, the feeding process of the feeding device of the present application is more reliable, more accurate, and has better fault tolerance, and is particularly suitable for applications requiring high precision and reliability.

[0048] As a further preferred embodiment, a mounting frame 11 for mounting the sliding mechanism 3 is provided in the cabinet 1; the material box position sensor 51 is installed on the mounting frame 11 through an adjustment bracket 12, and a first elongated hole 111 is provided on the mounting frame 11, and the adjustment bracket 12 is provided with a second elongated hole 121 which is perpendicular to the length direction of the first elongated hole.

[0049] Example 2

[0050] like Figure 1 As shown, a cooking machine includes a stirring pot 200, a stirring mechanism 300 arranged above the stirring pot, and a precise feeding device 100 of a material box as described above arranged on one side of the stirring pot. Figure 2-7 shown.

[0051] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A precise feeding device for a material box, characterized in that: It includes a cabinet, a material box sliding plate arranged on the surface of the cabinet, a sliding mechanism for driving the material box sliding plate to slide on the surface of the cabinet, a flipping mechanism for flipping the material box located on the feeding station, and a position monitoring mechanism for detecting the moving position of the material box on the material box sliding plate; The material box sliding plate is installed on the top of the cabinet and is used to carry multiple material boxes; the sliding mechanism includes a slider and a driving assembly, the slider is fixedly connected to the material box sliding plate, and the driving assembly is used to drive the slider to move on the top of the cabinet to drive the material box sliding plate to move on the top of the cabinet; The position monitoring mechanism includes multiple material box position sensors and induction sheets arranged under each material box, a material box position sensor is correspondingly arranged under each material box, and each material box position sensor is arranged at the same horizontal position and arranged in sequence, and the induction sheet is fixedly connected to the slider; when the output walking moving distance of the driving component is completely consistent with the position of the slider detected by each material box position sensor, it is judged that the material box position on the material box sliding plate has completely reached the feeding station, and the flipping mechanism flips the material box.

2. The precise feeding device for a material box according to claim 1, characterized in that: The driving assembly includes a first driving wheel and a first driven wheel installed in the cabinet, a first synchronous belt sleeved between the first driving wheel and the first driven wheel, and a material box motor drivingly connected to the first driving wheel; The slider is clamped on the first synchronous belt, the sensor sheet is installed at the lower part of the slider, and the end of the sensor sheet extends between the receiver and the transmitter of each material box position sensor; the material box motor rotates, driving the slider and the sensor sheet on the first synchronous belt to move horizontally, and each material box position sensor detects the horizontal sliding distance of the sensor sheet, thereby detecting the moving distance of each material box.

3. The precise feeding device for a material box according to claim 1, characterized in that: The sliding mechanism is also arranged on a slide rail at the bottom of the cabinet, and the sliding block is slidably connected to the slide rail and slides along the length direction of the slide rail.

4. The precise feeding device for a material box according to claim 1, characterized in that: The material box sliding plate includes a horizontal panel, a first upright side panel arranged on one side of the horizontal panel, and a second upright side panel arranged on the other side of the horizontal panel; a magnet sheet is protruding from the bottom of the material box, and a limiting opening hole matching the shape of the magnet sheet is opened in the middle of the horizontal panel. The material box is placed on the material box sliding plate through the cooperation of the magnet sheet and the limiting opening hole, and a plurality of nylon cover nuts are protruding from the bottom of the horizontal panel, and the first upright side panel extends downward to one side of the cabinet body, and a plurality of nylon cover nuts are arranged on the top of the cabinet body, and the second upright side panel is buckled on the plurality of nylon cover nuts on the cabinet body to realize the sliding limit of the material box sliding plate.

5. The precise feeding device for a material box according to claim 1, characterized in that: The flip mechanism is arranged below the feeding station, and includes a magnetic seat for adsorbing the bottom of the material box, a flip arm fixedly connected to the magnetic seat, a flip shaft for installing the flip arm, and a flip transmission assembly for driving the flip shaft to rotate.

6. The precise feeding device for a material box according to claim 5, characterized in that: The flip transmission assembly includes a flip motor, a second driving wheel, a second driven wheel, and a second synchronous belt; the second synchronous belt is sleeved between the second driving wheel and the second driven wheel, the second driven wheel is sleeved on the flip shaft, the second driving wheel is sleeved on the power output shaft of the flip motor, and the flip motor drives the flip arm to perform a flipping motion.

7. The precise feeding device for a material box according to claim 5, characterized in that: The flip mechanism also includes a flip arm position detection component for detecting the flip position of the flip arm, and the flip arm position detection component includes a sensing sheet and a flip arm position sensor. The sensing sheet is sleeved on the flip shaft, and the flip arm position sensor is installed in the cabinet. The sensing sheet extends between the receiver and the transmitter of the flip arm position sensor.

8. The precise feeding device for a material box according to claim 1, characterized in that: The number of the material boxes is four, and the number of the material box position sensors is four.

9. The precise feeding device for a material box according to claim 1, characterized in that: A mounting frame for mounting the sliding mechanism is provided in the cabinet; the material box position sensor is installed on the mounting frame through an adjustment bracket, a first elongated hole is provided on the mounting frame, and the adjustment bracket is provided with a second elongated hole which is perpendicular to the length direction of the first elongated hole.

10. A cooking machine, characterized in that: The invention comprises a stirring pot, a stirring mechanism arranged above the stirring pot, and a precise feeding device of a material box as claimed in any one of claims 1 to 9 arranged on one side of the stirring pot.

Images