Inclined opposed multi-screw extruder feeding loss-in-weight scale and weighing method

Abstract

A tilted opposed multi-screw extrusion feeding loss-in-weight scale and a weighing method. The tilted opposed multi-screw extrusion feeding loss-in-weight scale includes: a hopper, a load-bearing base and two feeding devices. The load-bearing base includes a discharge platform and a support arm, a pressure sensor, and an operation panel located on the discharge platform. The discharge platform is provided with a discharge cavity and two inclined surfaces, and a pressure rod is provided on the outer wall of the hopper. The feeding device includes a motor, a synchronous belt drive module, a material box and a plurality of screws located in the material box, and a discharge hole is opened on the material box. There are two feeding devices, and each feeding device is provided with a plurality of screws for joint feeding, which can improve the feeding efficiency between units, making the loss-in-weight scale suitable for occasions with large feeding volumes and requiring batch production. Each feeding device is provided with a plurality of screws responsible for pushing the material. Even if one of the discharge holes is blocked, the other screws can still keep feeding, reducing the number of shutdowns for maintenance and making the feeding process continuous.

Description

Technical Field

[0001] The invention relates to the field of weighing equipment, in particular to an inclined opposed multi-screw extrusion feeding loss-in-weight scale and a weighing method. Background Art

[0002] A loss-in-weight scale is an automatic weighing device that achieves high-precision continuous quantitative feeding through static weighing. It can feed dry bulk materials such as powders, granules, and flakes reliably, accurately, and stably, reducing material waste and improving the consistency of the mixture.

[0003] The feeding process of a loss-in-weight scale mainly pushes the material from the hopper to the discharge position through the rotation of the screw. The feeding speed is controlled by adjusting the screw speed. That is, the feeding speed of the loss-in-weight scale is positively correlated with the screw speed. However, existing loss-in-weight scales use a single screw for feeding. The feeding speed is limited by the screw speed and is not suitable for batch production scenarios. In addition, when processing wet materials, the discharge part often becomes blocked, requiring frequent shutdowns for maintenance, and the feeding process is inconsistent. Summary of the Invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide an inclined opposed multi-screw extruder feeding loss-in-weight scale and a weighing method thereof, so as to achieve stable and continuous feeding, improve feeding efficiency, and enable the loss-in-weight scale to be used in large-scale production occasions.

[0005] The object of the present invention is achieved through the following technical solutions:

[0006] An inclined opposed multi-screw extruder feeding loss-in-weight scale, comprising: a hopper, a load-bearing base and two feeding devices;

[0007] The load-bearing base includes a discharge platform and a support arm, a pressure sensor, and an operation panel located on the discharge platform. The discharge platform is provided with a discharge cavity and two inclined surfaces. The feeding device is provided on the inclined surfaces, and both feeding devices are inclined toward the location of the discharge cavity. The hopper is provided on the discharge platform, and the support arm is in contact with the outer wall of the hopper. A pressure rod is provided on the outer wall of the hopper, and the pressure rod is used to press the pressure sensor.

[0008] The feeding device includes a motor, a synchronous belt transmission module, a material box and multiple screws located in the material box. The material box is provided with a discharge hole matching the screw, the discharge hole faces the discharge cavity, the hopper is connected to the material box, the synchronous belt transmission module is used to connect the motor and the screw, and the screw is used to push the material in the material box into the discharge hole.

[0009] In one embodiment, a torque meter is provided at the connection position between the motor and the synchronous belt drive module; the material box is provided with a feed cavity, and each of the discharge holes is connected to the feed cavity; a docking port matching the feed cavity is provided at the bottom of the hopper, and the screw is connected to the synchronous belt drive module, and the screw extends from the feed cavity to the discharge hole; a plurality of the screws are spaced apart along the long side direction of the feed cavity, and threaded push paddles are provided on the screws at positions located in the feed cavity and the discharge hole, and the spiral directions of the push paddles on adjacent screws are opposite.

[0010] In one embodiment, there are two docking ports, each of which is connected to the feed cavity on one of the material boxes, and the inner cavity of the hopper is provided with a conical diverter block, which is located between the two docking ports. The width of the conical diverter block decreases from the end close to the docking port to the end away from the docking port, and the conical diverter block is used to guide the material to move toward the docking port.

[0011] In one embodiment, two inserting plates are further included. The inserting plates are slidably arranged on the hopper. The inserting plates are provided with blocking parts. The blocking parts extend into the hopper to block the docking port.

[0012] In one embodiment, the width of the hopper increases gradually from the end close to the feeding device to the end away from the feeding device; there are two support arms, each of which includes a lifting beam, a contact block and two columns, and clamps are provided at both ends of the lifting beam. The clamps are passed through the columns, and the contact block is rotatably provided on the lifting beam, and the contact block is used to abut against the outer wall of the hopper.

[0013] In one embodiment, the load-bearing base is further provided with a mounting platform, a guide groove is provided on the top of the mounting platform, the pressure sensor is located in the guide groove, and the outer wall of the pressure rod is in contact with the inner wall of the guide groove.

[0014] In one embodiment, a telescopic foot is provided at the bottom of the load-bearing base.

[0015] In one embodiment, the number of the screws is 10.

[0016] A weighing method, based on the above-mentioned inclined opposed multi-screw extruder feeding loss-in-weight scale, is characterized by comprising the following steps:

[0017] Step 1: Place the hopper on the load-bearing base, make the pressure rod contact the pressure sensor, and adjust the pressure sensor to zero;

[0018] Step 2: Mix and stir the materials evenly and put them into the hopper, so that the materials enter the feeding cavity of the material box through the docking port;

[0019] Step 3: The pressure sensor measures the weight of the material in the hopper at this time, and the feeding amount is set through the operation panel;

[0020] Step 4: The motor drives all screws to rotate synchronously, and the push paddle pushes the material into the discharge chamber;

[0021] Step 5: When the torque meter is triggered, change the direction of rotation of the motor to keep the screw rotating until the feeding task is completed.

[0022] The above-mentioned inclined opposed multi-screw extruder feeding loss-in-weight scale and weighing method have the following beneficial effects:

[0023] 1. It is equipped with two feeding devices, and each feeding device is equipped with multiple screws to feed together, which can improve the feeding efficiency between units, making the loss-in-weight scale suitable for occasions with large feeding volume and batch production;

[0024] 2. Each feeding device is equipped with multiple screws responsible for pushing the material. Even if one of the discharge holes is blocked, the other screws can still keep feeding, reducing the number of shutdowns for maintenance and making the feeding process continuous. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 This is a schematic diagram of the structure of an inclined opposed multi-screw extruder feeding loss-in-weight scale;

[0027] Figure 2 This is the internal structure diagram of the inclined opposed multi-screw extruder feeding loss-in-weight scale;

[0028] Figure 3 It is a structural diagram of the load-bearing base;

[0029] Figure 4 It is a structural diagram of the feeding device;

[0030] Figure 5 Schematic diagram of the coordination between the material box and the screw;

[0031] Figure 6 Schematic diagram of the distribution of the feed cavity and the discharge hole.

[0032] Reference numerals: 10, inclined opposed multi-screw extruder feeding loss-in-weight scale; 100, hopper; 110, pressure rod; 120, docking port; 130, conical diverter block; 200, load-bearing base; 210, discharge platform; 211, discharge cavity; 212, inclined surface; 220, support arm; 221, lifting beam; 222, contact block; 223, column; 224, clamp; 230, pressure sensor; 240 , operation panel; 250, mounting table; 251, guide groove; 260, telescopic foot; 300, feeding device; 310, motor; 320, synchronous belt drive module; 330, material box; 331, discharge hole; 332, feed chamber; 340, screw; 341, push paddle; 341a, right-hand thread; 341b, left-hand thread; 350, torque meter; 400, insert plate; 410, blocking part. DETAILED DESCRIPTION

[0033] To facilitate understanding of the present invention, the present invention will be described more fully below with reference to the accompanying drawings. The accompanying drawings illustrate preferred embodiments of the present invention. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the present disclosure.

[0034] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly attached to the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0036] See also Figure 1 and Figure 2 A tilted opposed multi-screw extruder feeding loss-in-weight scale 10 includes a hopper 100, a load-bearing base 200, and two feeding devices 300. Material is temporarily stored in the hopper 100, and the feeding devices 300 and the load-bearing base 200 cooperate to feed the material in the hopper 100 in a measured amount.

[0037] See also Figure 1 and Figure 2The load-bearing base 200 includes a discharge platform 210 and a support arm 220 located on the discharge platform 210, a pressure sensor 230, and an operation panel 240. The discharge platform 210 is provided with a discharge cavity 211 and two inclined surfaces 212. The feeding device 300 is provided on the inclined surface 212, and both feeding devices 300 are inclined toward the position of the discharge cavity 211. The hopper 100 is provided on the discharge platform 210, and the support arm 220 is in contact with the outer wall of the hopper 100. A pressure rod 110 is provided on the outer wall of the hopper 100, and the pressure rod 110 is used to press the pressure sensor 230.

[0038] See also Figure 4 and Figure 5 The feeding device 300 includes a motor 310, a synchronous belt drive module 320, a material box 330, and a plurality of screws 340 located in the material box 330. The material box 330 is provided with a discharge hole 331 that matches the screws 340. The discharge hole 331 faces the discharge cavity 211. The hopper 100 is connected to the material box 330. The synchronous belt drive module 320 is used to connect the motor 310 and the screws 340. The screws 340 are used to push the material in the material box 330 into the discharge hole 331. Preferably, the number of screws 340 is 10.

[0039] The working principle of the inclined opposed multi-screw extruder feeding loss-in-weight scale 10 is as follows:

[0040] After docking the hopper 100 with the support arm 220, the pressure rod 110 on the hopper 100 presses the pressure sensor 230, and the pressure value is adjusted to zero through the operation panel 240; the material is loaded into the hopper 100, and the feeding amount is set on the operation panel 240;

[0041] After the above preparations are completed, the inclined opposed multi-screw extruder feeding loss-in-weight scale 10 is turned on, and the motor 310 drives the screw 340 to rotate synchronously through the synchronous belt transmission module 320. When the screw 340 rotates, it can push the material to be discharged from the discharge hole 331.

[0042] The amount of material discharged is positively correlated with the speed of screw 340: the faster the screw 340 rotates, the greater the material discharge; conversely, the slower the screw 340 rotates, the smaller the material discharge. The user can set the feed rate on the operation panel 240. The pressure sensor 230 measures the decrease in material weight and feeds it back to the circuit board within the operation panel 240. If the decrease in material weight per unit time is inconsistent with the user-set feed rate, the speed of motor 310 can be increased or decreased, adjusting the feed rate by changing the speed of screw 340. In other words, the speed of motor 310 is increased or decreased based on the change in material weight within hopper 100 as reported by pressure sensor 230, achieving quantitative material discharge.

[0043] The above-mentioned inclined opposed multi-screw extruder feeding loss-in-weight scale 10 has the following beneficial effects:

[0044] 1. It is equipped with two feeding devices 300, and each feeding device 300 is equipped with multiple screws 340 for feeding together, which can improve the feeding efficiency between units, making the loss-in-weight scale suitable for occasions with large feeding volume and batch production;

[0045] 2. Each feeding device 300 is equipped with multiple screws 340 responsible for pushing materials. Even if one of the discharge holes 331 is blocked, the other screws 340 can still keep feeding, reducing the number of shutdowns for maintenance and making the feeding process continuous.

[0046] In the above embodiment, the feeding rate per unit time is increased by providing multiple screws 340. Furthermore, the provision of multiple screws 340 provides multiple discharge locations. If one discharge hole 331 becomes clogged, other discharge holes 331 are available for feeding, eliminating the need to stop the machine for maintenance during feeding, thereby ensuring consistent and stable feeding. However, the above feeding method fails to eliminate the impact of material blockage on the loss-in-weight scale itself. After the material in the hopper 100 is emptied, maintenance personnel are still required to clear the discharge holes 331. This merely postpones the material blockage issue until after the feeding task is completed, delaying equipment maintenance and leaving the material blockage issue unresolved. In extreme cases, such as when all screws 340 are clogged or the resistance generated by the material blockage is excessive, causing the motor 310 to overload, the machine must be shut down for maintenance.

[0047] In order to solve the above problems, the following improvements are made to the inclined opposed multi-screw extruder feeding loss-in-weight scale 10:

[0048] See also Figure 4 and Figure 5 A torque meter 350 is provided at the connection position between the motor 310 and the synchronous belt transmission module 320; the user can set the parameters of the torque meter 350. When the torque at the output end of the motor 310 reaches the set value, the torque meter 350 is triggered and sends a signal to the operation panel 240. When the torque meter 350 is triggered, it proves that the discharge hole 331 is blocked, causing the motor 310 to be overloaded.

[0049] See also Figure 5 and Figure 6 The material box 330 is provided with a feed cavity 332, and each discharge hole 331 is connected to the feed cavity 332. The bottom of the hopper 100 is provided with a docking port 120 matching the feed cavity 332. The screw 340 is connected to the synchronous belt drive module 320, and the screw 340 extends from the feed cavity 332 to the discharge hole 331; the material in the hopper 100 falls into the feed cavity 332 under the action of gravity, and multiple discharge holes 331 are all connected to the feed cavity 332. The screw 340 rotates to push the feed cavity 332 into the discharge hole 331, so that the material is discharged from the discharge hole 331.

[0050] See also Figure 4 and Figure 5 , multiple screws 340 are spaced apart along the long side direction of the feed chamber 332, and threaded push paddles 341 are provided on the screws 340 at positions located in the feed chamber 332 and the discharge hole 331, and the spiral directions of the push paddles 341 on adjacent screws 340 are opposite. For example, the push paddle 341 on one of the screws 340 is a right-handed thread 341a, and the push paddle 341 on the other screw 340 adjacent to the screw 340 is a left-handed thread 341b. The push paddle 341 is a structure on the screw 340 for pushing materials.

[0051] The present invention also provides the following weighing method, based on the above-mentioned inclined opposed multi-screw extruder feeding loss-in-weight scale 10, characterized in that it includes the following steps:

[0052] Step 1: Place the hopper 100 on the load-bearing base 200, make the pressure rod 110 contact the pressure sensor 230, and adjust the pressure sensor 230 to zero;

[0053] Step 2: Mix and stir the materials evenly and put them into the hopper 100, so that the materials enter the feeding cavity 332 of the material box 330 through the docking port 120;

[0054] The value measured by the pressure sensor 230 after the material enters the hopper 100 is the total weight of the material. During the feeding process of the loss-in-weight scale, the weight of the material will continue to decrease. The pressure sensor 230 is used to detect the amount of material reduction per unit time.

[0055] Step 3: The pressure sensor 230 measures the weight of the material in the hopper 100 at this time, and the feeding amount is set through the operation panel 240;

[0056] The operation panel 240 adjusts the rotation speed of the motor 310 according to the signal fed back by the pressure sensor 230 to control the pushing speed of the screw 340 so as to meet the feeding amount set by the user.

[0057] Step 4: The motor 310 drives all the screws 340 to rotate synchronously, and the pusher paddle 341 pushes the material into the discharge chamber 211;

[0058] Since the push paddles 341 on the adjacent screws 340 rotate in opposite directions, half of the screws 340 perform the feeding action, and the other half of the screws 340 clear the discharge hole 331 .

[0059] Step 5: When the torque meter 350 is triggered, the rotation direction of the motor 310 is changed so that the screw 340 keeps rotating until the feeding task is completed.

[0060] When the torque meter 350 is triggered, it means that the discharge hole 331 corresponding to the screw 340 performing the feeding action is blocked by the material, causing the motor 310 to be overloaded. Changing the rotation direction of the motor 310 can change the rotation direction of the screw 340, and the screw 340 that originally performed the feeding action begins to clear the discharge hole 331, and the discharge hole 331 that was originally cleared begins to perform the feeding action.

[0061] It should be noted that because the pusher paddles 341 are threaded, and the spiral directions of the pusher paddles 341 on adjacent screws 340 are opposite, and the multiple screws 340 in the same material box 330 rotate synchronously, when one screw 340 rotates to push the material in the feed chamber 332 into the discharge hole 331 for feeding, the pusher paddle 341 on the screw 340 adjacent to the screw 340 pushes the material in the opposite direction, that is, from the discharge hole 331 to the feed chamber 332. In other words, the two adjacent screws 340 push the material in opposite directions.

[0062] When the motor 310 is started, only half of the screws 340 in the same material box 330 perform the feeding action, and the other half of the screws 340 do not participate in the feeding action. When the discharge hole 331 is blocked during the pushing process of the screw 340 participating in the feeding action, and the motor 310 is overloaded, the motor 310 can be reversed to change the rotation direction of the screw 340, and the screw 310 that originally did not participate in the feeding will push the material to fall from the corresponding discharge hole 331; and the screw 310 that originally had the feeding task in a straight line will push the material blocked in the discharge hole 331 into the feed cavity 332, thereby eliminating the blockage problem.

[0063] It should be emphasized that since the screw 340 in the same material box 330 is provided with a push paddle 341 with opposite rotation direction, when the feeding device 300 feeds, half of the screw 340 is feeding in a straight line, and the other half of the screw 340 is actually clearing the discharge hole 331. When there is a material blockage problem in the screw 340 performing the feeding action, the motor 310 can be driven in reverse to transfer the other half of the screw 340 to take over the feeding action, so that the feeding process is continuous. In addition, due to the reversal, the screw 340 that originally performed the feeding action is reversed to push the blocked discharge hole 331 back into the feed chamber 332, and there is no need to stop the machine specifically to deal with the problem of material blockage.

[0064] See also Figure 2 and Figure 4In one embodiment, two docking ports 120 are provided, each of which communicates with a corresponding feed cavity 332 on a material box 330. A conical diverter block 130 is provided within the inner cavity of the hopper 100. The conical diverter block 130 is located between the two docking ports 120. The width of the conical diverter block 130 decreases from the end closest to the docking port 120 to the end farther from the docking port 120. The conical diverter block 130 is used to guide the material toward the docking port 120. The conical diverter block 130 guides the material's falling direction within the hopper 100, allowing it to fall smoothly into the feed cavities 332 of the two feeding devices 300.

[0065] See also Figure 2 The inclined opposed multi-screw extruder feeding loss-in-weight scale 10 also includes two insert plates 400, which are slidably arranged on the hopper 100. The insert plates 400 are provided with a blocking portion 410, which extends into the hopper 100 to block the docking port 120, so that the timing of material falling can be controlled.

[0066] See also Figure 2 and Figure 3 Furthermore, the width of the hopper 100 increases from the end closest to the feeding device 300 to the end further away from the feeding device 300. Two support arms 220 are provided, each comprising a lifting beam 221, a contact block 222, and two upright posts 223. Hoops 224 are provided at both ends of the lifting beam 221, and the upright posts 223 are provided with upright posts 223. The contact block 222 is rotatably mounted on the lifting beam 221 and is configured to abut against the outer wall of the hopper 100. The contact blocks 222 on the two support arms 220 cooperate to provide support for the hopper 100. Loosening the clamps 224 allows the height of the lifting beam 221 to be adjusted, thereby adjusting the fixed height of the hopper 100. This allows the support arms 220 to be raised and lowered, thus accommodating hoppers 100 of varying sizes.

[0067] See also Figure 3 In one embodiment, the load-bearing base 200 further includes a mounting platform 250. A guide groove 251 is defined at the top of the mounting platform 250. The pressure sensor 230 is positioned within the guide groove 251, and the outer wall of the pressure rod 110 is aligned with the inner wall of the guide groove 251. The guide groove 251 provides a position limit for the pressure rod 110, guiding the pressure rod 110 to contact the pressure sensor 230, thereby improving the detection accuracy of the pressure sensor 230.

[0068] See also Figure 1 and Figure 2 In one embodiment, a telescopic foot 260 is provided at the bottom of the load-bearing base 200. The telescopic foot 260 can push the load-bearing base 200 up or down to adjust the falling height of the material.

[0069] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. An inclined opposed multi-screw extruder feeding loss-in-weight scale, characterized in that: include: Hopper, load-bearing base and two feeding devices; The load-bearing base includes a discharging platform and a support arm, a pressure sensor, and an operation panel located on the discharging platform; a material discharge cavity and two inclined surfaces are provided on the discharging platform; the feeding device is provided on the inclined surfaces, and the two feeding devices are inclined toward the position of the material discharge cavity; the hopper is provided on the discharging platform, and the support arm is in contact with the outer wall of the hopper; a pressure rod is provided on the outer wall of the hopper, and the pressure rod is used to press the pressure sensor; the feeding device includes a motor, a synchronous belt transmission module, a material box and a plurality of screws located in the material box; a discharging hole matching the screw is opened on the material box, the discharging hole faces the material discharge cavity, the hopper is connected to the material box, the synchronous belt transmission module is used to connect the motor and the screw, and the screw is used to push the material in the material box into the discharging hole; A torque meter is provided at the connection position between the motor and the synchronous belt transmission module; the material box is provided with a feed cavity, and each of the discharge holes is communicated with the feed cavity; a docking interface matching the feed cavity is provided at the bottom of the hopper, and the screw is connected to the synchronous belt transmission module, and the screw extends from the feed cavity to the discharge hole; a plurality of the screws are spaced apart along the long side direction of the feed cavity, and threaded push paddles are provided on the screws at positions located in the feed cavity and the discharge hole, and the spiral directions of the push paddles on adjacent screws are opposite.

2. The inclined opposed multi-screw extruder feeding loss-in-weight scale according to claim 1, characterized in that: There are two docking ports, each of which is connected to the feed cavity on one of the material boxes. The inner cavity of the hopper is provided with a conical diverter block, and the conical diverter block is located between the two docking ports. The width of the conical diverter block decreases from the end close to the docking port to the end away from the docking port. The conical diverter block is used to guide the material to move toward the docking port.

3. The inclined opposed multi-screw extruder feeding loss-in-weight scale according to claim 2, characterized in that: It also includes two inserting plates, which are slidably arranged on the hopper. The inserting plates are provided with blocking parts, which extend into the hopper to block the docking port.

4. The inclined opposed multi-screw extruder feeding loss-in-weight scale according to claim 1, characterized in that: The width of the hopper increases gradually from an end close to the feeding device to an end away from the feeding device; There are two support arms, which include a lifting beam, a contact block and two columns. Both ends of the lifting beam are provided with clamps, and the columns are passed through the clamps. The contact block is rotatably provided on the lifting beam, and the contact block is used to abut against the outer wall of the hopper.

5. The inclined opposed multi-screw extruder feeding loss-in-weight scale according to claim 1, characterized in that: The load-bearing base is further provided with a mounting platform, a guide groove is provided on the top of the mounting platform, the pressure sensor is located in the guide groove, and the outer wall of the pressure rod is in contact with the inner wall of the guide groove.

6. The inclined opposed multi-screw extruder feeding loss-in-weight scale according to claim 1, characterized in that: A telescopic foot seat is provided at the bottom of the load-bearing base.

7. The inclined opposed multi-screw extruder feeding loss-in-weight scale according to claim 1, characterized in that: The number of the screws is 10.

8. A weighing method based on the inclined opposed multi-screw extruder feeding loss-in-weight scale according to any one of claims 1 to 7, characterized in that: The following steps are involved: Step 1: Place the hopper on the load-bearing base, make the pressure rod contact the pressure sensor, and adjust the pressure sensor to zero; Step 2: Mix and stir the materials evenly and put them into the hopper, so that the materials enter the feeding cavity of the material box through the docking port; Step 3: The pressure sensor measures the weight of the material in the hopper at this time, and the feeding amount is set through the operation panel; Step 4: The motor drives all screws to rotate synchronously, and the push paddle pushes the material into the discharge chamber; Step 5: When the torque meter is triggered, change the direction of rotation of the motor to keep the screw rotating until the feeding task is completed.

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