Multi-component batching device

Abstract

The utility model discloses a multi-component batching device, and belongs to the technical field of thin film processing equipment. Comprising a rack, a blanking base, a stirring structure, a batching hopper, a storage structure, an electric cabinet, a batching scale, a weightlessness scale and an alarm, the storage structure, the batching hopper, the stirring structure and the blanking base are sequentially arranged from top to bottom, the electric cabinet is arranged on the left side or the right side of the rack, and the stirring structure comprises a stirring barrel, stirring blades and a driving motor; the stirring barrel is obliquely arranged in the left-right direction, the end, close to the electric cabinet, of the stirring barrel is obliquely arranged downwards, a stirring feeding port is formed in the top of the stirring barrel, the stirring barrel is arranged on the rack through a weightlessness scale, a first visual window is arranged at the end, away from the electric cabinet, of the stirring barrel, and a stirring discharging port in the bottom of the stirring barrel outputs materials to the discharging base. The driving motor is positioned at one end of the stirring barrel close to the electric cabinet; the weightlessness scale is used for carrying out weightlessness detection on materials in the stirring barrel, and when the weightlessness scale detects that the weight of the materials in the stirring barrel is smaller than a first preset value and larger than a second preset value, the alarm gives an alarm.

Description

Technical Field

[0001] This utility model belongs to the technical field of film processing equipment, and particularly relates to a multi-group dispensing device, especially a multi-group dispensing device that can achieve microgram weight control in film production. Background Technology

[0002] In the production of plastic film using blown film machines, the increasing variety of product process requirements has led to a greater number of raw material ratios, far exceeding the previous single-raw-material production. Modern film products may now require two, three, or even more raw material ratios. Furthermore, fluctuations such as day-night temperature differences and inconsistent motor speeds due to grid voltage can cause thickness deviations in the film, resulting in films that are too thick or too thin. In existing technology, workers manually mix the various raw materials required for production before feeding them into the feeding machine. During production, the film thickness is checked several times after each roll is produced, and the weight at the time of feeding is monitored to ensure it is within the set weight range. The traction motor speed is constantly adjusted, but even with these measures, the specified mixing and thickness accuracy cannot always be achieved.

[0003] Existing technologies disclose various multi-component dispensing devices to achieve multi-component proportioning, but they cannot detect the output weight of the material after dispensing.

[0004] For example, patent application number CN201620065863.1 discloses a continuous proportioning total loss-in-weight extrusion control system. The system includes a human-machine interface unit, a PLC controller, a batching control unit, multiple servo motors, multiple metering screws corresponding to the multiple servo motors, multiple storage tanks corresponding to the multiple metering screws, a raw material receiving bin, a discharge valve, a discharge control unit, a loss-in-weight bin, a loss-in-weight sensor, an extrusion speed control unit, an extrusion driver, an extruder, a traction speed control unit, a traction frequency converter, and a traction device. The PLC controller is connected to the human-machine interface unit, the batching control unit, the extrusion speed control unit, and the traction speed control unit. The batching control unit is connected to the multiple servo motors. Each servo motor is mechanically connected to a corresponding metering screw. Each metering screw is installed inside a corresponding storage tank near the bottom. The bottom of each storage tank is mechanically connected to the side of the raw material receiving bin. A discharge valve is installed at the bottom of the raw material receiving bin and is connected to the discharge control unit. The extrusion speed control unit, extrusion driver, and extruder are connected in sequence. The extruder is located directly below the loss-in-weight barrel, and the loss-in-weight barrel is located directly below the raw material receiving bin. The traction speed control unit, traction frequency converter, and traction device are connected in sequence. The traction device is mechanically connected to the extruder. The loss-in-weight sensor is installed at the bottom of the loss-in-weight barrel and sends signals to the feeding control unit and the PLC controller.

[0005] For example, patent application number CN202023296743.8 discloses a multi-component weighing mixing device, including a silo, a weighing hopper, and a mixing silo arranged in sequence. The silos are located at the upper end of the weighing hopper and are distributed in several groups. Each group of silos is connected to the weighing hopper through a conveying pipe. A control mechanism is provided between the silo and the conveying pipe. The upper end of the weighing hopper is provided with a feed inlet corresponding to the conveying pipe. The feed inlet is sleeved on the outer end of the conveying pipe. The weighing hopper calculates the weight of the material through a weighing module. The lower end of the weighing hopper is provided with a first discharge valve. The lower end of the first discharge valve is connected to the mixing silo. The mixing silo is provided with a mixing mechanism for mixing the material. The lower end of the mixing silo is provided with a second discharge valve for discharging the mixed material.

[0006] The above patents are used to achieve the proportioning and output of various materials. However, they cannot achieve precise control of the gram weight of the thin film, and therefore cannot achieve precise control of the film thickness. Utility Model Content

[0007] To address the aforementioned problems, this utility model provides a multi-group dispensing device that controls the output weight of the mixed material using a loss-in-weight scale and controls the film gram weight by combining the rotational speed of the screw extruder. An alarm and a first viewing window ensure that the material in the mixing tank remains within a predetermined range. The technical solution is as follows:

[0008] This utility model provides a multi-group dispensing device, which includes a frame 1, a material discharge base 2, a stirring structure 3, a dispensing hopper 4, a storage structure, an electrical control box 6, and a dispensing scale 7. The storage structure, dispensing hopper 4, stirring structure 3, and material discharge base 2 are arranged sequentially from top to bottom. The bottom of the material discharge base 2 is connected to a screw extruder. The dispensing hopper 4 is mounted on the frame 1 via the dispensing scale 7. The electrical control box 6 is located on the left or right side of the frame 1. The stirring structure 3 includes a stirring tank 31, stirring blades 32 coaxially arranged inside the stirring tank 31, and a drive motor 33 outside the stirring tank 31 for driving the stirring blades 32. The device also includes a loss-in-weight scale 8. The mixing tank 31 is tilted to the left and right, with its end near the electrical control box 6 tilted downwards. A mixing inlet 34 is located at its top and directly below the batching hopper 4, mounted on the frame 1 via a loss-in-weight scale 8. A first viewing window 36 is located at its end away from the electrical control box 6, and a mixing outlet 35 at its bottom outputs material to the discharge base 2. The drive motor 33 is located at the end of the mixing tank 31 near the electrical control box 6 and directly below it. The loss-in-weight scale 8 detects the weight loss of the material in the mixing tank 31, and triggers the alarm 9 when the weight of the material in the mixing tank 31 is less than a first predetermined value or greater than a second predetermined value.

[0009] In this embodiment of the present invention, the storage structure includes multiple storage hoppers 5. A dispensing valve 10 is provided at the discharge port at the bottom of the storage hopper 5 and is located directly above the dispensing hopper 4. A discharge valve 11 is provided at the discharge port at the bottom of the dispensing hopper 4. The number of storage hoppers 5 is 3-6.

[0010] Specifically, in this embodiment of the present invention, multiple storage hoppers 5 are spliced ​​together to form a rectangular hopper with a conical bottom and arranged in two columns. Each column of storage hoppers 5 includes multiple storage hoppers 5 arranged side by side. Each storage hopper 5 has a second viewing window 12 on its lower part and outward side.

[0011] More specifically, in this embodiment of the present invention, there are 6 storage hoppers 5; the storage structure has 3 second viewing windows 12 arranged side by side on both the front and rear sides, and 2 second viewing windows 12 arranged side by side on both the left and right sides; a feeding valve 10 is provided on the front side of the discharge port of the front row of storage hoppers 5, and a feeding valve 10 is provided on the rear side of the discharge port of the rear row of storage hoppers 5; the 3 feeding valves 10 in the front are arranged side by side, and the 3 feeding valves 10 in the rear are arranged side by side; the discharge valve 11 is arranged in the front-rear direction.

[0012] Furthermore, in this embodiment of the present invention, the top of the storage hopper 5 is provided with a vacuum feeder 13; the vacuum feeder 13 is provided with a vacuum suction valve 14, and a magnetic proximity switch 15 for detecting the position of the material is provided in its lower part; the batching scale 7, the loss-in-weight scale 8, the alarm 9, the drive motor 33 and the magnetic proximity switch 15 are electrically connected to the electrical control box 6, and the electrical control box 6 controls the batching valve 10, the discharge valve 11 and the vacuum suction valve 14.

[0013] In this embodiment of the present invention, the frame 1 is a rectangular frame structure with open left and right sides. The storage hopper 5 is fixed on the upper side of the frame 1. The batching scale 7 is located in the middle of the frame 1, on the side of the batching hopper 4 near the electrical control box 6, and is fixedly connected to the bottom of the batching hopper 4. The loss-in-weight scale 8 is located at the bottom of the frame 1, on the side of the mixing tank 31 near the electrical control box 6, and is fixedly connected to the bottom of the mixing tank 31. The material discharge base 2 is vertically arranged and located on the lower side of the frame 1.

[0014] Specifically, in this embodiment of the present invention, the alarm 9 is an audible and visual alarm, which is located on the top of the electrical control box 6; the top of the electrical control box 6 is inclined near the storage hopper 5.

[0015] In this embodiment of the present invention, the mixing inlet 34 is located at the top of the mixing tank 31 and at one end away from the electrical control box 6; the mixing outlet 35 is located directly below the mixing inlet 34, at the bottom of the mixing tank 31 and at one end close to the electrical control box 6.

[0016] Specifically, in this embodiment of the present invention, the mixing tank 31 is a cylindrical tank with an inclination angle of 20-40°.

[0017] In this embodiment of the present invention, the first viewing window 36 includes two fan-shaped viewing windows arranged vertically opposite each other, and the fan-shaped viewing windows are coaxially arranged with the mixing tank 31.

[0018] The beneficial effects of the technical solution provided by this utility model embodiment are:

[0019] (1) The weight of the mixed material output is controlled by the loss-in-weight scale, and the film meter weight is controlled by the rotation speed of the screw extruder.

[0020] (2) Ensure that the material in the mixing tank is within the predetermined range (between the fourth predetermined value and the second predetermined value) by using an alarm (automatic alarm) and the first viewing window (manual observation). Too much material may cause overflow, and too little material may cause equipment malfunction. When the material is at the appropriate weight (fourth predetermined value), control the discharge valve to open.

[0021] (3) The inclined mixing tank facilitates the downward discharge of materials.

[0022] (4) The device has a compact structure and small size, making it easy to observe the first viewing window.

[0023] (5) This patent can realize the automatic batching of various (such as six) materials to meet the production needs of film. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the multi-group dispensing device in an embodiment of this utility model;

[0025] Figure 2 This is a side view of the multi-group dispensing device in an embodiment of this utility model;

[0026] Figure 3 This is a circuit block diagram of the multi-group dispensing device in an embodiment of the present invention.

[0027] In the diagram: 1. Frame, 2. Discharge base, 3. Mixing structure, 4. Batching hopper, 5. Storage hopper, 6. Electrical control box, 7. Batching scale, 8. Loss-in-weight scale, 9. Alarm, 10. Batching valve, 11. Discharge valve, 12. Second viewing window, 13. Vacuum feeder, 14. Vacuum feed valve, 15. Magnetic proximity switch, 16. Discharge port.

[0028] 31 Mixing tank, 32 Mixing blades, 33 Drive motor, 34 Mixing inlet, 35 Mixing outlet, 36 First viewing window. Detailed Implementation

[0029] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.

[0030] Example 1

[0031] See Figure 1-3 Example 1 provides a multi-group dispensing device, which includes a frame 1, a material dropping base 2, a stirring structure 3, a dispensing hopper 4, a storage structure, an electrical control box 6, a dispensing scale 7, a loss-in-weight scale 8, and an alarm 9, etc.

[0032] The frame 1 is vertically oriented and is a rectangular frame structure with openings on both the left and right sides. The storage structure, batching hopper 4, mixing structure 3, and discharge base 2 are arranged sequentially from top to bottom. The storage structure (storage hopper 5) is fixed to the upper side of the frame 1. The discharge base 2 is vertically oriented and located on the lower side of the frame 1. Its bottom is connected to the screw extruder, and it has a discharge port (located near the electrical control box 6, normally closed). The batching hopper 4 is vertically oriented and mounted on the frame 1 via a batching scale 7. It is a conical hopper, wider at the top and narrower at the bottom, with a discharge valve 11 at its bottom outlet. The batching scale 7 is located in the middle of the frame 1, on the side of the batching hopper 4 closest to the electrical control box 6 (left or right side), and is fixedly connected to the bottom of the batching hopper 4. The alarm 9 is an audible and visual alarm, located on the top of the electrical control box 6. The electrical control box 6 is located on the left or right side of the frame 1, and is tilted at its top near the storage structure (storage hopper 5) to avoid obstruction. The storage structure includes multiple storage hoppers 5, with 3-6 hoppers in total. A dispensing valve 10 is located at the discharge port at the bottom of each storage hopper 5, directly above the dispensing hopper 4, and a vacuum feeder 13 is located at its top. The vacuum feeder 13 is connected to a corresponding feeding device via pipeline, and a magnetic proximity switch 15 for detecting the material position is located in its lower part. A vacuum suction valve 14 is located on its vacuum extraction port (connected to the vacuum feeder via pipeline).

[0033] The mixing structure 3 includes a mixing tank 31, mixing blades 32, and a drive motor 33. The mixing tank 31 is tilted left-right (tilt angle 20-40°), with its end near the control box 6 angled downwards. A mixing inlet 34 (a through-hole structure) is located at its top and directly below the batching hopper 4, and is mounted on the frame 1 via a loss-in-weight scale 8. A first viewing window 36 is located at the end furthest from the control box 6 (left or right end). A mixing outlet 35 (specifically a vertically arranged circular tube structure) at its bottom outputs material to a discharge base 2, which is a cylindrical container. The loss-in-weight scale 8 is located at the bottom of the frame 1, on the side of the mixing tank 31 closest to the control box 6 (left or right side), and is fixedly connected to the bottom of the mixing tank 31. It is used to detect the loss in weight of the material inside the mixing tank 31 (during detection, the mixing blades 32 can stop mixing). The mixing blades 32 are coaxially mounted inside the mixing tank 31. A drive motor 33 drives the stirring blades 32, which are located outside the stirring tank 31, at one end (left or right) of the stirring tank 31 near the electrical control box 6, directly below the electrical control box 6, and facing upwards to avoid obstruction. Specifically, the stirring inlet 34 is located at the top of the stirring tank 31 and away from the electrical control box 6. The stirring outlet 35 is located directly below the stirring inlet 34, at the bottom of the stirring tank 31 and near the electrical control box 6. This structure facilitates observation of the first viewing window 36.

[0034] The batching scale 7, loss-in-weight scale 8, alarm 9, drive motor 33, and magnetic proximity switch 15 are electrically connected to the control box 6. The control box 6 is vertically positioned and controls the entire device. It controls the batching valve 10, the discharge valve 11, and the vacuum suction valve 14. All three valves are pneumatic. The loss-in-weight scale 8 triggers the alarm 9 when it detects that the weight of the material in the mixing tank 31 is less than a first predetermined value (to ensure there is always material in the mixing tank 31) or greater than a second predetermined value (to prevent overflow). The first predetermined value can be 1 / 5 of the full weight of the material in the mixing tank 31, and the second predetermined value can be 2 / 3 of the full weight of the material in the mixing tank 31. Both values ​​are set according to actual needs. When the material in the mixing tank 31 is less than a fourth predetermined value, the discharge valve 11 is opened. The fourth predetermined value is between the first and second predetermined values. In addition, if the weight of material input from a storage hopper 5 to the batching hopper 4 is less than the third predetermined value, the alarm 9 can also be triggered.

[0035] In this patent, the micron weight of the film can be calculated based on the detection value of the loss-in-weight scale 8 combined with the rotational speed of the motor of the screw extruder.

[0036] Example 2

[0037] See Figure 1-2 Example 2 provides a multi-group dispensing device, whose structure is basically the same as that of Example 1, except that: in this example, multiple storage hoppers 5 are spliced ​​together to form a rectangular hopper with a conical bottom (which can be divided into multiple storage hoppers 5 by front-to-back and left-to-right partitions), and they are arranged in two rows, with the two rows of storage hoppers 5 arranged side by side. Correspondingly, each row of storage hoppers 5 includes multiple storage hoppers 5 (rectangular hoppers, with one or both sides of their lower part inclined) arranged side by side. Each storage hopper 5 has a second viewing window 12 (located on the inclined surface) on its lower and outward-facing side; specifically, the storage hopper 5 has one or two second viewing windows 12.

[0038] Example 3

[0039] See Figure 1-2Example 3 provides a multi-group dispensing device, whose structure is basically the same as that of Example 1, except that: in this example, there are 6 storage hoppers 5, and each row of storage hoppers 5 includes 3 storage hoppers 5 arranged side by side. Three second viewing windows 12 are arranged side by side on both the front and rear sides of the storage structure, and two second viewing windows 12 are arranged side by side on both the left and right sides. Specifically, a second viewing window 12 is provided on the front or rear side of the storage hopper 5 in the middle of each row of storage hoppers 5; two second viewing windows 12 are provided on the end storage hoppers 5, one on the front or rear side and the other on the left or rear side. A dispensing valve 10 is provided on the front side of the discharge port of the front row of storage hoppers 5, and a dispensing valve 10 is provided on the rear side of the discharge port of the rear row of storage hoppers 5. The three dispensing valves 10 at the front are arranged side by side, and the three dispensing valves 10 at the rear are arranged side by side. The discharge valve 11 is arranged in the front-rear direction.

[0040] Example 4

[0041] See Figure 2 Example 4 provides a multi-group dispensing device, whose structure is basically the same as that of Example 1, except that: the first viewing window 36 in this example includes two fan-shaped viewing windows arranged opposite each other, and the fan-shaped viewing windows are coaxially arranged with the mixing tank 31.

[0042] Example 5

[0043] See Figure 1 Example 5 provides a multi-group dispensing device, whose structure is basically the same as that of Example 1, except that the tilt angle of the mixing tank 31 in this example is 30°.

[0044] Example 6

[0045] See Figure 1-2 This embodiment provides a multi-group dispensing device, whose structure is basically the same as that of Embodiment 1, except that: in this embodiment, the electrical control box 6 is located on the left side of the frame 1, and its top right side is arranged diagonally downward from left to right. The mixing tank 31 is arranged diagonally downward from right to left, the drive motor 33 is located at the left end of the mixing tank 31, and the first viewing window 36 is located at the right end of the mixing tank 31. The batching scale 7 is located on the left side of the batching hopper 4, and the loss-in-weight scale 8 is located on the left side of the mixing tank 31.

[0046] In this embodiment, "first", "second", "third" and "fourth" serve only as distinctions and have no other special meanings.

[0047] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A multi-unit feeding device, comprising a frame (1), a feeding base (2), a stirring structure (3), a feeding hopper (4), a storage structure, an electrical control box (6), and a feeding scale (7), wherein the storage structure, the feeding hopper (4), the stirring structure (3), and the feeding base (2) are arranged sequentially from top to bottom, the bottom of the feeding base (2) is connected to a screw extruder, the feeding hopper (4) is mounted on the frame (1) via the feeding scale (7), the electrical control box (6) is located on the left or right side of the frame (1), and the stirring structure (3) comprises a stirring tank (31), stirring blades (32) coaxially arranged inside the stirring tank (31), and a drive motor (33) outside the stirring tank (31) for driving the stirring blades (32); characterized in that, The device also includes a loss-in-weight scale (8) and an alarm (9); the mixing tank (31) is tilted to the left and right, with the end near the electrical control box (6) tilted downwards, and a mixing inlet (34) is provided on its top and directly below the batching hopper (4), which is mounted on the frame (1) via the loss-in-weight scale (8), and a first viewing window (36) is provided on the end away from the electrical control box (6), and the mixing outlet (35) at its bottom outputs the material to the dropping base (2); the drive motor (33) is located at the end of the mixing tank (31) near the electrical control box (6) and directly below the electrical control box (6); the loss-in-weight scale (8) performs weight loss detection on the material in the mixing tank (31), and when it detects that the weight of the material in the mixing tank (31) is less than a first predetermined value and greater than a second predetermined value, it triggers the alarm (9).

2. The multi-group dispensing device according to claim 1, characterized in that, The storage structure includes multiple storage hoppers (5), and a feeding valve (10) is provided on the discharge port at the bottom of the storage hopper (5) and it is located directly above the feeding hopper (4). A discharge valve (11) is provided on the discharge port at the bottom of the feeding hopper (4). The number of storage hoppers (5) is 3-6.

3. The multi-group dispensing device according to claim 2, characterized in that, Multiple storage hoppers (5) are spliced ​​together to form a rectangular hopper with a conical bottom and arranged in two rows. Each row of storage hoppers (5) includes multiple storage hoppers (5) arranged side by side. Each storage hopper (5) has a second viewing window (12) on its lower part and outward side.

4. The multi-group dispensing device according to claim 3, characterized in that, The number of storage hoppers (5) is 6; the front and rear sides of the storage structure are provided with 3 second viewing windows (12) arranged side by side, and the left and right sides are provided with 2 second viewing windows (12) arranged side by side; the front of the discharge port of the front row of storage hoppers (5) is provided with a feeding valve (10), and the rear of the discharge port of the rear row of storage hoppers (5) is provided with a feeding valve (10); the 3 feeding valves (10) in the front are arranged side by side, and the 3 feeding valves (10) in the rear are arranged side by side; the discharge valve (11) is arranged in the front and rear direction.

5. The multi-group dispensing device according to claim 2, characterized in that, The top of the storage hopper (5) is equipped with a vacuum feeder (13); the vacuum feeder (13) is equipped with a vacuum suction valve (14), and a magnetic proximity switch (15) for detecting the position of the material is provided in the lower part of the vacuum feeder (14); the batching scale (7), loss-in-weight scale (8), alarm (9), drive motor (33) and magnetic proximity switch (15) are electrically connected to the electrical control box (6), and the electrical control box (6) controls the batching valve (10), the discharge valve (11) and the vacuum suction valve (14).

6. The multi-group dispensing device according to claim 2, characterized in that, The frame (1) is a rectangular frame structure with open sides on the left and right. The storage hopper (5) is fixed on the upper side of the frame (1). The batching scale (7) is located in the middle of the frame (1), on the side of the batching hopper (4) near the electrical control box (6), and is fixedly connected to the bottom of the batching hopper (4). The loss-in-weight scale (8) is located at the bottom of the frame (1), on the side of the mixing tank (31) near the electrical control box (6), and is fixedly connected to the bottom of the mixing tank (31). The material dropping base (2) is vertically arranged and located on the lower side of the frame (1).

7. The multi-group dispensing device according to claim 2, characterized in that, The alarm (9) is an audible and visual alarm, which is located on the top of the electrical control box (6); the electrical control box (6) is tilted on the top and near the storage hopper (5).

8. The multi-group dispensing device according to claim 1, characterized in that, The mixing inlet (34) is located at the top of the mixing tank (31) and away from the electrical control box (6); the mixing outlet (35) is located directly below the mixing inlet (34), at the bottom of the mixing tank (31) and close to the electrical control box (6).

9. The multi-group dispensing device according to claim 1, characterized in that, The mixing tank (31) is a cylindrical tank with an inclination angle of 20-40°.

10. The multi-group dispensing device according to claim 1, characterized in that, The first viewing window (36) includes two fan-shaped viewing windows arranged opposite each other, and the fan-shaped viewing windows are coaxially arranged with the mixing tank (31).

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