Toner mixer

Abstract

The utility model discloses a toner mixer which comprises a mixer body, at least one main material screw conveyor and at least one auxiliary material conveying module, wherein a mixing cavity with an open upper end is arranged in the mixer body, a mixing piece is arranged in the mixing cavity and is driven by a mixing motor outside the mixer body to rotate, and the toner mixer further comprises at least one main material screw conveyor and at least one auxiliary material conveying module, the main material screw conveyor and the auxiliary material conveying module are arranged at the top of the stirring machine body, a main material hopper is installed on the upper side of the main material screw conveyor, the auxiliary material conveying module comprises a weighing assembly and an auxiliary material bin arranged on the upper side of the weighing assembly, the weighing assembly comprises a weighing sensor and a connecting shaft erected at the upper end of the weighing sensor, and the first axial end of the connecting shaft is connected with a weighing spoon; the weighing spoon is located over the stirring cavity, a motor is arranged at the second axial end of the connecting shaft, and a main shaft of the motor is in transmission fit with the connecting shaft. According to the utility model, various problems of manual stirring and mixing in the prior art can be solved.

Description

Technical Field

[0001] The utility model relates to the field of auxiliary machines for injection molding machines, in particular to a color powder mixer. Background Art

[0002] At present, during the use of the injection molding machine, the main material and the auxiliary material need to be continuously and fully stirred before the injection molding mixture can be added to the injection molding machine for use. At present, ordinary mixers are used for stirring manually, and the materials need to be mixed in advance and manually poured, and the cleaning cycle is long when changing colors. Manual mixing is prone to uneven mixing due to the large mixing volume, resulting in color difference in the product; traditional manual mixing requires cleaning of the mixer, suction machine, desiccant and feed pipe when changing the color of the product, which is time-consuming and labor-intensive; traditional manual mixing is prone to dust in the workshop, and some raw materials need to be dried. The fan of the dryer will blow the dust throughout the workshop, polluting the working environment and easily damaging the health of on-site workers. Due to the leakage of color powder, the consistency of product color is also reduced; traditional manual mixing requires the addition of diffusion oil or diffusion powder to increase the adhesion between the color powder and the granular material due to the large mixing volume. Traditional manual mixing requires mixing in advance, bagging and adding to the injection molding machine feeding port. Multiple transportation links easily lead to impurities, affecting product quality. Traditional manual mixing barrels are relatively large and cannot be used up at one time, which easily leads to waste. If it is not enough, you have to wait for mixing, which delays production. Utility Model Content

[0003] The utility model provides a color powder mixer which can solve various problems of existing manual stirring and mixing.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a color powder mixer, comprising: a mixer body, the interior of the mixer body is divided into an upper and lower layer, the upper layer is provided with a stirring chamber with an open upper end, and the lower layer is provided with a movable storage bin, the interior of the stirring chamber is provided with a stirring piece, and the stirring piece is driven to rotate by a stirring motor outside the mixer body, and also comprises at least one main material screw conveyor and at least one auxiliary material conveying module, both of which are arranged on the top of the mixer body, a main material hopper is installed on the upper side of the main material screw conveyor, the auxiliary material conveying module comprises a screw feeding box, a weighing assembly and an auxiliary material bin arranged on the upper side of the weighing assembly, the weighing assembly comprises a weighing sensor and a connecting shaft mounted on the upper end of the weighing sensor, a weighing spoon is connected to the axial first end of the connecting shaft, and the weighing spoon is located directly above the stirring chamber, and a motor is arranged at the axial second end of the connecting shaft, and the main shaft of the motor is matched with the connecting shaft in transmission.

[0005] Preferably, the second axial end of the connecting shaft is provided with a groove, and the end of the main shaft is provided with a matching portion extending into the groove.

[0006] Preferably, a spring-type pusher is installed at the axial first end of the connecting shaft, and a knocking spring is installed on one side of the weighing spoon. The spring-type pusher cooperates with the knocking spring to push the knocking spring outward when the spring-type pusher rotates one circle along with the connecting shaft. When the weighing spoon is facing downward, the knocking spring is separated from the spring-type pusher and the knocking spring rebounds to knock the weighing spoon.

[0007] Preferably, the spring pusher comprises a disc body and a radial extension portion arranged at the edge of the disc body, one side of the radial extension portion transitions tangentially with the circumferential edge of the disc body, and the other side is provided with a straight edge along the radial direction of the disc body.

[0008] Preferably, the main material screw conveyors are relatively installed on both sides of the upper end of the mixer body, and the auxiliary material conveying module is installed between the two main material screw conveyors.

[0009] Preferably, a feed opening is arranged at the lower end of the toner mixer body, a mounting plate is arranged at the feed opening, and the mounting plate is connected to a feed opening of the injection molding machine.

[0010] Preferably, a weighing module is installed on the auxiliary material silo.

[0011] Preferably, a control box is arranged outside the body of the color powder mixer, a controller is installed inside the control box, and the controller is electrically connected to the main material screw conveyor, the motor, the weighing sensor and the weighing module.

[0012] Preferably, a discharge port is provided at the lower end of the stirring chamber, a discharge baffle is provided at the lower side of the discharge port, one side of the discharge baffle is connected to the rotating shaft, one end of the rotating shaft is connected to the turntable on the rear side of the color powder mixer body, the turntable is eccentrically connected to one end of the spring, and the other end of the spring is connected to the swing plate on the output end of the discharge motor.

[0013] Preferably, a surrounding column extending upward is provided at a position on the top of the stirring chamber corresponding to the weighing spoon, and the weighing spoon is located inside the surrounding column.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The main material screw conveyor and the auxiliary material conveying module are provided. The auxiliary material conveying module has a screw powder delivery box and a matching weighing component. The main material screw conveyor and the auxiliary material conveying module can automatically and accurately mix the ingredients in small doses according to the designed ratio. You can mix as much as you need without adding diffusion oil or diffusion powder. After mixing, the materials are directly fed to the injection molding machine, which can achieve uniform gloss and no color difference of the product. The color can be changed at any time, which reduces the waste of raw materials and saves time.

[0016] 2. The connecting shaft of the weighing spoon and the main shaft of the motor are flexibly connected, so that the weighing sensor will not be held back by the force when the motor returns to its original position, thus avoiding affecting the weighing effect. At the same time, a knocking structure is provided, which knocks the weighing spoon by knocking the spring when the weighing spoon is facing downward, so as to prevent the auxiliary materials from remaining on the weighing spoon and affecting the accuracy of the auxiliary materials added;

[0017] 3. Cleaning is relatively convenient. You only need to clean the main material hopper, color powder weighing spoon and color powder mixer body. It is more convenient to clean with a handheld vacuum cleaner with a brush.

[0018] 4. The dried plastic particles and color powder are mixed in a closed bin to prevent powder leakage and improve the working environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a front three-dimensional structural diagram of the utility model;

[0020] Figure 2 This is a three-dimensional structural diagram of the utility model after the front door is removed;

[0021] Figure 3 It is a rear three-dimensional structural diagram of the utility model;

[0022] Figure 4 It is a side cross-sectional structural diagram of the utility model;

[0023] Figure 5 for Figure 4 A magnified structural diagram;

[0024] Figure 6 This is a main structural diagram of the weighing assembly of the utility model;

[0025] Figure 7 It is a three-dimensional structural diagram of the weighing assembly of the utility model.

[0026] Reference numerals:

[0027] 1. Mixer body, 11. Stirring element, 12. Discharge port, 13. Discharge baffle, 14. Rotating shaft, 15. Column, 16. Spring, 17. Discharge motor, 18. Turntable, 19. Swinging plate, 2. Main material screw conveyor, 3. Weighing assembly, 31. Weighing sensor, 32. Motor, 33. Main shaft, 34. Weighing spoon, 35. Connecting shaft, 36. Knocking shrapnel, 37. Shrapnel pusher, 38. Matching part, 39. Groove, 4. Bin door, 41. Disc body, 42. Radial extension part, 5. Stirring chamber, 6. Main material hopper, 7. Auxiliary material conveying module, 71. Auxiliary material silo, 8. Mounting plate, 9. Stirring motor, 10. Control box. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0029] like Figure 1-7 As shown, the utility model provides the following technical solutions to solve various problems of existing manual mixing: a color powder mixer, comprising: a mixer body 1, the interior of the mixer body 1 is divided into an upper and lower layer, the upper layer is provided with a stirring chamber 5 with an open upper end, and the lower layer is provided with a movable storage bin, the stirring chamber 5 is provided with a stirring member 11, and the stirring member 11 is driven to rotate by a stirring motor 9 outside the mixer body 1, and also includes at least one main material screw conveyor 2 and at least one auxiliary material conveying module 7, both of which are arranged on the top of the mixer body 1, the main material hopper 6 is installed on the upper side of the main material screw conveyor 2, and the auxiliary material conveying module 7 includes a weighing component 3. and an auxiliary material bin 71 and a screw feed box arranged on the upper side of the weighing assembly 3. The weighing assembly 3 includes a weighing sensor 31 and a connecting shaft 35 mounted on the upper end of the weighing sensor 31. The first axial end of the connecting shaft 35 is connected to a weighing spoon 34, and the weighing spoon 34 is located directly above the stirring chamber 5. The second axial end of the connecting shaft 35 is provided with a motor 32, and the main shaft 33 of the motor 32 is in transmission cooperation with the connecting shaft 35. The number of main material screw conveyors 2 can be set according to the type and color of the main material, and can be composed of a single-hopper color powder weighing mixer, a double-hopper color powder weighing mixer, a three-hopper color powder weighing mixer, or a four-hopper color powder weighing mixer. An opening can be provided on the front side of the color powder mixer body 1, and an openable bin door 4 is installed at the opening. After the bin door 4 is opened, the inside of the mixer body 1 can be quickly cleaned with tools, which is very convenient.

[0030] In order to improve the accuracy of the weighing assembly 3, a groove 39 is provided at the second axial end of the connecting shaft 35, and a matching portion 38 extending into the groove 39 is provided at the end of the main shaft 33. Since there is a gap between the groove 39 and the matching portion 38, there is no coupling between the main shaft 33 and the connecting shaft 35 at the moment when the motor 32 is started. In this way, the motor 32 will not generate a relatively large vibration to the weighing spoon 34 at the moment of starting, thereby preventing the auxiliary materials on the weighing spoon 34 from falling off. Moreover, since there is no coupling between the motor 32, the main shaft 33 and the connecting shaft 35, the weighing sensor will not be held back by the force when the motor returns to its original position, thereby avoiding affecting the weighing effect.

[0031] In this embodiment, if Figure 6 As shown, the groove 39 is U-shaped, and the matching portion 38 is flat. When the main shaft 33 rotates, it rotates a certain angle to contact the side wall of the groove 39 to drive the connecting shaft 35 to rotate.

[0032] The weighing sensor 31 adopts the existing gravity sensor. There is no connection between the motor 32 and the main shaft 33. The connecting shaft 35 and the weighing spoon 34 are arranged on the front side of the weighing sensor 31. A powder conveying motor can be arranged at the tail of the screw powder feeding box, which is connected to the conveying screw to convey the powder in the screw powder feeding box forward.

[0033] In order to ensure that all the auxiliary materials inside the weighing spoon 34 can fall down without any residue when the weighing spoon 34 is facing downward, Figure 6-7 As shown, a spring pusher 37 is installed at the axial first end of the connecting shaft 35, and a knocking spring 36 is installed on one side of the weighing spoon 34. The spring pusher 37 cooperates with the knocking spring 36 and pushes the knocking spring 36 to move outward when the spring pusher 37 rotates 180 degrees along with the connecting shaft 35. The angle can be set as required. When the weighing spoon 34 is facing downward, the knocking spring 36 is disengaged from the spring pusher 37 and the knocking spring 36 rebounds to knock the weighing spoon 34.

[0034] At the same time, as a specific embodiment of the spring pusher 40, Figure 7 As shown, the spring piece pusher 37 includes a disc body 41 and a radial extension 42 arranged at the edge of the disc body 41. One side of the radial extension 42 is tangentially transitioned to the circumferential edge of the disc body 41, and the other side is provided with a straight edge along the radial direction of the disc body 41. When the portion where the radial extension 42 is tangentially transitioned to the circumferential edge of the disc body 41 contacts the striking spring piece 36, the striking spring piece 36 can be pushed outward. When the position of the striking spring piece 36 corresponds to the straight edge, the rebound striking the weighing spoon 34 is achieved. At the same time, in order to improve the striking effect, the end of the striking spring piece 36 is provided with a curling portion corresponding to the weighing spoon 34, and when the curling portion strikes the weighing spoon 34, a relatively large vibration can be generated.

[0035] In this embodiment, if Figure 1-3 As shown, the main material screw conveyor 2 is relatively installed on both sides of the upper end of the mixer body 1, and the auxiliary material conveying module 7 is installed between the two main material screw conveyors 2. The main material hoppers 6 on the two main material screw conveyors 2 can store different main materials. The main material screw conveyor 2 adopts a traditional screw conveyor. During installation, the two main material screw conveyors 2 and the auxiliary material conveying module 7 can be installed on the installation platform at the upper end of the mixer body 1, which is relatively stable.

[0036] In this embodiment, if Figure 1-2 As shown, the lower end of the color powder mixer body 1 is provided with a discharge port, and a mounting plate 8 is provided at the discharge port. The mounting plate 8 is connected to the feeding port of the injection molding machine. The mounting plate 8 can realize the installation of the entire mixer on the upper side of the feeding port of the injection molding machine. A valve plate can be installed on the mounting plate 8 to control the discharge.

[0037] In this embodiment, a weighing module is installed on the auxiliary material hopper 71, which can monitor the change of powder in the screw-type powder delivery box in the auxiliary material hopper 71, and set the alarm value of the remaining amount in the powder delivery box. For example, if there are 1000 grams of toner in the box, the alarm value is set to 200 grams. After continuous powder discharge, the powder amount in the box is displayed to be less than 200 grams, the buzzer alarms, and the touch screen displays the alarm content, prompting the operator to add toner in time. The main material hopper 6 can be connected to an automatic feeding suction machine, so that automatic feeding can be achieved and labor can be reduced.

[0038] In this embodiment, a control box 10 is provided on the outside of the mixer body 1, and a controller is installed inside the control box 10. The controller is electrically connected to the main material screw conveyor 2, the motor 32, the weighing sensor 31 and the weighing module. A display operation interface can be installed on the outside of the mixer body 1 to facilitate the input of ratios and other operations. The display operation interface is also electrically connected to the controller.

[0039] In this embodiment, in order to quickly and accurately control the discharge of the mixed material in the mixing chamber 5, a discharge port 12 is provided at the lower end of the mixing chamber 5, and a discharge baffle 13 is provided on the lower side of the discharge port 12. One side of the discharge baffle 13 is connected to the rotating shaft 14, and one end of the rotating shaft 14 is connected to the turntable 18 on the rear side of the mixer body 1. The turntable 18 is eccentrically connected to one end of the spring 16, and the other end of the spring 16 is connected to the swing plate 19 on the output end of the discharge motor 17. The swing plate 19 can be driven to swing by the discharge motor 17, and a transmission can be installed between the discharge motor 17 and the swing plate 19. The swinging of the swing plate 19 drives the spring 16 to move, so that the turntable 18 rotates, driving the discharge baffle 13 to flip, thereby realizing the discharge of the mixed material.

[0040] In order to allow all the powder in the weighing spoon 34 to enter the stirring chamber 5, an upwardly extending column 15 is provided at the top of the stirring chamber 5 corresponding to the weighing spoon 34. The weighing spoon 34 is located in the column 15 to prevent the powder from overflowing when the weighing spoon 34 is turned over.

[0041] The control process of the toner mixer in this embodiment includes the following steps:

[0042] After the toner mixer in this embodiment is powered on, the various materials that need to be conveyed by the screw are calibrated through the functions on the display operation interface, and the weighing sensor is calibrated and adjusted to zero.

[0043] Specific screw test calibration method: the equipment is in a stopped state, the display operation interface switches to the calibration page, set the appropriate "test speed" and "test time", and the default values ​​are generally sufficient. For example, the test speed is 20 rpm and the test time is 60 seconds. Place a material receiving box at the feed port, click the "test" button, run a 60-second cycle, and after the screw stops, empty the material receiving box, click the "test" button, run a 60-second cycle, and after the screw stops, click the "test" button again. Test three times in a row, weigh the raw materials in the material receiving box, take the average value and enter it into the "test weight".

[0044] Specific method for calibrating the weighing sensor: When the device is in the stopped state, empty the weighing spoon, switch the display operation interface to the calibration page, click the "Scale Reset" button, then place the calibration weight on the weighing spoon, and enter the weight of the weight in the corresponding input box. After waiting for the reading to stabilize, click the "Scale Calibration" button, and the weighing spoon calibration is completed.

[0045] Then set the proportion of each material, the amount of color powder added at a time and the speed of the main material screw. Take the single-screw color powder weighing mixer as an example. The main material is PP material, the auxiliary material is color powder, the single mixing amount is 1000g, and the particle feeding time is 60s. If the ratio of the two is 1000:1, then enter the 1# screw ratio of 100% and the color powder ratio of 0.1%. The corresponding particle feeding amount is calculated to be 1000g and the color powder is 1g. The screw speed automatically obtains the corresponding speed during actual work according to the calibration value. By adjusting the particle feeding time, the motor speed is controlled to keep the motor speed within the maximum speed range to achieve stable production needs.

[0046] Next, click the "start button" on the touch screen and it turns green, and the equipment enters the standby state. When the weighing spoon 34 is out of material, the auxiliary material bin 71 starts to unload the material and transport the powder material into the weighing spoon 34. The weighing sensor feeds back the real-time weight to the controller and displays it on the touch screen. When the recognized weight is close to the target weight (the advance amount can be set to stop the auxiliary material bin 71 in advance), for example, the target powder weight is 1g, and the advance amount for stopping the powder is set to 0.05g. When the material is discharged and the displayed weight reaches 0.95g, the auxiliary material bin 71 stops. Because the scale has a small amplitude jump, when the jump value is lower than 0.95g, the auxiliary material bin 71 will start again to reach the target amount. When the weighing recognizes that the powder weight reaches the target range, the auxiliary material bin 71 stops, and the weighing sensor 31 records the final powder delivery weight, for example, 0.99g. Because the ratio is 1000:1, the powder weight is 0.99g, and the algorithm concludes that the PP material actually needs to be unloaded 999g. When it is determined that there is no material in the mixing bin 5, the main material screw conveyor 2 starts feeding and the mixing motor 9 starts rotating. When the feeding amount reaches 50% of the target feeding amount (this value can be modified by the powder starting ratio on the touch screen parameter page), the weighing spoon 34 turns 180 degrees to mix the color powder into the main material. When the main material delivery amount reaches the target value, it stops. The delayed stop time of the mixing motor 9 can be set, for example, 5s. When the particle feeding screw stops, the mixing motor 9 will continue to work for another 5s before stopping.

[0047] When the storage bin of the injection molding machine has a material shortage signal, the discharging port can be opened only after the mixing bin 5 completes the mixing action, and the mixed raw materials are fed into the storage bin. After the set discharging time is reached, the storage bin is closed. After the mixing bin 5 finishes discharging, the weighing spoon 34 flips over to find its original position, returns to the origin, and the powder feeding motor starts working and weighs according to the target value. After weighing is completed, wait for the weighing spoon 34 to flip signal.

[0048] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0049] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0050] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0051] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. A toner mixer, comprising: A mixer body (1), wherein the interior of the mixer body (1) is divided into an upper and lower layer, the upper layer is provided with a stirring chamber (5) with an open upper end, and the lower layer is provided with a movable material storage bin, the stirring chamber (5) is provided with a stirring member (11) inside, and the stirring member (11) is driven to rotate by a stirring motor (9) outside the mixer body (1), characterized in that: The invention also comprises at least one main material screw conveyor (2) and at least one auxiliary material conveying module (7), both of which are arranged on the top of the mixing machine body (1); a main material hopper (6) is installed on the upper side of the main material screw conveyor (2); the auxiliary material conveying module (7) comprises a weighing component (3) and an auxiliary material bin (71) arranged on the upper side of the weighing component (3); the weighing component (3) comprises a weighing sensor (31) and a connecting shaft (35) mounted on the upper end of the weighing sensor (31); a weighing spoon (34) is connected to the axial first end of the connecting shaft (35); the weighing spoon (34) is located directly above the mixing chamber (5); a motor (32) is arranged at the axial second end of the connecting shaft (35); the main shaft (33) of the motor (32) is in transmission cooperation with the connecting shaft (35).

2. The toner mixer according to claim 1, characterized in that: The second axial end of the connecting shaft (35) is provided with a groove (39), and the end of the main shaft (33) is provided with a matching portion (38) extending into the groove (39).

3. The toner mixer according to claim 2, characterized in that: A spring-type pusher (37) is installed at the axial first end of the connecting shaft (35), and a knocking spring (36) is installed at one side of the weighing spoon (34). The spring-type pusher (37) cooperates with the knocking spring (36) so that when the spring-type pusher (37) rotates 180 degrees along with the connecting shaft (35), the knocking spring (36) is pushed to move outward. When the weighing spoon (34) faces downward, the knocking spring (36) is separated from the spring-type pusher (37) and the knocking spring (36) rebounds to knock the weighing spoon (34).

4. The toner mixer according to claim 3, characterized in that: The spring pusher (37) comprises a disc body (41) and a radial extension portion (42) arranged at the edge of the disc body (41); one side of the radial extension portion (42) transitions tangentially with the circumferential edge of the disc body (41), and the other side is provided with a straight edge along the radial direction of the disc body (41).

5. The toner mixer according to claim 1, characterized in that: The main material screw conveyors (2) are relatively installed on both sides of the upper end of the mixer body (1), and the auxiliary material conveying module (7) is installed at a position between the two main material screw conveyors (2).

6. The toner mixer according to claim 1, characterized in that: The lower end of the mixer body (1) is provided with a feed opening, and a mounting plate (8) is provided at the feed opening. The mounting plate (8) is connected to the feed opening of the injection molding machine.

7. The toner mixer according to claim 1, characterized in that: The auxiliary material bin (71) is equipped with a screw-type powder delivery box and a weighing module.

8. The toner mixer according to claim 7, characterized in that: A control box (10) is arranged outside the mixer body (1), and a controller is installed inside the control box (10). The controller is electrically connected to the main material screw conveyor (2), the motor (32), the weighing sensor (31) and the weighing module.

9. The toner mixer according to claim 1, characterized in that: A feeding port (12) is provided at the lower end of the mixing chamber (5), a feeding baffle (13) is provided at the lower side of the feeding port (12), one side of the feeding baffle (13) is connected to a rotating shaft (14), one end of the rotating shaft (14) is connected to a turntable (18) at the rear side of the mixing machine body (1), the turntable (18) is eccentrically connected to one end of a spring (16), and the other end of the spring (16) is connected to a swing plate (19) on the output end of a feeding motor (17).

10. The toner mixer according to claim 1, characterized in that: An upwardly extending surrounding column (15) is arranged at a position on the top of the stirring chamber (5) corresponding to the weighing spoon (34), and the weighing spoon (34) is located inside the surrounding column (15).

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