A premixing type of batcher for film production

Abstract

The utility model discloses a premix formula batching device of film production, including premix mechanism, its top is provided with a plurality of main material feed port, and premix mechanism top corresponds each main material feed port all is provided with main material bin, the premix mechanism still contains the upper part's receiving part and the lower part's premix part, and the receiving part is used for receiving and guiding the main material that falls into the premix part, the premix part lateral wall sets up auxiliary material feed port, and auxiliary material feed port passes through the injection assembly and connects auxiliary material bin, and the injection assembly is used for forming negative pressure suction auxiliary material, and makes auxiliary material injection premix part with vertical falling main material form mixing, premix part below is provided with weighing mechanism, is used for receiving the blanking that premix forms, and the real -time weight of blanking is weighed, the utility model discloses can realize the premix of main, auxiliary material in the batching process, and provides the physical basis for the subsequent high -precision automatic weighing proportioning, to solve the uneven mixing in the prior art device, the problem such as low efficiency of batching precision interference.

Description

Technical Field

[0001] This utility model relates to the field of thin film production technology, and in particular to a premixed batching device for thin film production. Background Technology

[0002] In the film production process, the precise proportioning and uniform mixing of various raw materials (such as polymer particles, masterbatches, and other main materials, as well as trace auxiliary materials such as colorants and additives) is a crucial step in determining the quality of film products. Currently, manual batching and automatic weighing batching are the main methods; however, manual batching is labor-intensive and has low production efficiency.

[0003] While automatic weighing and batching achieves automation, its system structure typically consists of a simple weighing hopper. Its function is limited to weighing; all materials are simply layered and piled up within the hopper. Uniform mixing relies entirely on subsequent dedicated mixing equipment. For trace amounts of auxiliary materials (such as color masterbatches), they can usually only be added separately after all the main materials have been weighed, or directly into the subsequent mixer using a separate feeder. The former leads to the concentration of auxiliary materials in one spot of the material pile; the latter decouples the addition of auxiliary materials from the proportion of the main materials, complicates precision control, and easily generates dust and losses. Furthermore, because the initial state of the materials is layered and may agglomerate, this significantly increases the load and operating time of the subsequent mixing equipment, resulting in high energy consumption and difficulty in guaranteeing 100% mixing uniformity, posing a potential quality risk for high-end film products. Summary of the Invention

[0004] Purpose of the invention: In order to overcome the shortcomings of the existing technology, this utility model provides a premixed batching device for film production, which can realize the premixing of main and auxiliary materials during the batching process and provide a physical basis for subsequent high-precision automated weighing and proportioning, so as to solve the problems of uneven mixing, interference with batching accuracy, and low efficiency in the existing devices.

[0005] Technical Solution: To achieve the above objectives, this utility model provides a premixed batching device for film production, comprising a premixing mechanism with a main material feeding section at its top, having several main material feeding ports. A main material silo is provided above each of the main material feeding ports. The premixing mechanism further includes an upper receiving section and a lower premixing section. The receiving section receives and guides the falling main material into the premixing section. An auxiliary material feeding port is opened on the side wall of the premixing section. The auxiliary material feeding port is connected to the auxiliary material silo via a spraying assembly. The spraying assembly is used to create negative pressure to suck up the auxiliary material, causing the auxiliary material to be sprayed into the premixing section and mixed with the vertically falling main material. A weighing mechanism is provided below the premixing section to receive the premixed material and weigh its real-time weight.

[0006] Furthermore, the receiving part is a bucket-shaped structure, the premixing part is a vertical tubular structure coaxial with the receiving part, and the multiple main material inlets are evenly distributed circumferentially corresponding to the conical area of ​​the receiving part.

[0007] Furthermore, the receiving part is integrally arranged with the main material feeding part and the premixing part, and the receiving part is rotatably arranged along its own axis, with radial guide plates evenly distributed in a ring on the conical surface area of ​​the receiving part.

[0008] Furthermore, a plurality of auxiliary material inlets are evenly distributed along the circumference of the premix section.

[0009] Furthermore, the ejection end of the auxiliary material inlet is inclined downward at a small angle.

[0010] Furthermore, each of the main material inlets is equipped with a controllable valve, and the blowing assembly is equipped with a valve with adjustable flow rate; the weighing module of the weighing mechanism is electrically connected to the control module to collect and feed back the real-time weight of the falling material to the control module, and the control module is electrically connected to multiple valves to control the opening and closing or the degree of opening of the valves.

[0011] Furthermore, the valve at the main material inlet is a solenoid valve.

[0012] Furthermore, the valve of the jetting assembly is a proportional valve.

[0013] Beneficial Effects: This utility model discloses a premixed batching device for film production, which enables premixing of main and auxiliary materials during the batching process, ensuring the uniform distribution of the final auxiliary materials. It utilizes airflow-driven auxiliary flow and gravity-falling main materials for real-time mixing within the pipeline, resulting in higher efficiency compared to subsequent mechanical mixing. The design, including a rotating receiving section, guide plates, circumferentially distributed feed inlets, and inclined spraying, significantly optimizes the mixing effect and ensures the uniformity of the film raw materials. Real-time weighing feedback signals precisely control the addition amount of various materials, guaranteeing accurate proportions. This invention solves the problems of uneven mixing, interference with batching accuracy, and low efficiency in existing devices. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of one embodiment of the premixed batching device of this utility model. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings.

[0016] As attached Figure 1The aforementioned premixed batching device for film production includes a premixing mechanism 1, the top of which has a main material feeding section 10 with several main material inlets. A main material hopper 2 is provided above the premixing mechanism 1 corresponding to each of the main material inlets. This allows multiple main materials to be fed into their respective main material hoppers 2 through the main material feeding section 10 at the top.

[0017] The premixing mechanism 1 further includes an upper receiving section 11 and a lower premixing section 12. The receiving section 11 is used to receive and guide the falling main material into the premixing section 12. The falling main material falls vertically under the guidance of the receiving section 11, thereby forming a vertically falling column of main material in the premixing section.

[0018] The premixing section 12 has an auxiliary material inlet on its side wall. This inlet is connected to the auxiliary material hopper 5 via a spray assembly 4. The spray assembly 4 creates negative pressure to draw in the auxiliary material, causing it to be sprayed into the premixing section 12 and mixed with the vertically falling main material. This allows the auxiliary material to be sprayed laterally at high speed into the falling main material stream, creating dynamic mixing. This ensures that the lighter, finer powdered auxiliary material is initially mixed with the main material during the falling process, reducing the load on subsequent mixers. This, in turn, improves the efficiency of the entire batching process.

[0019] The inner wall of the premixing section can be polished with food-grade stainless steel or sprayed with a non-stick coating, such as a Teflon coating, to prevent materials from sticking to the wall due to moisture or static electricity, especially powdered excipients, thus avoiding loss of excipients and affecting the accuracy of the dispensing, ensuring smooth material flow and easy cleaning.

[0020] A weighing mechanism 6 is installed below the premixing section 12, including a hopper and a weighing module. The hopper receives the material produced by the premixing process, and the weighing module can use one or more weighing sensors to measure the real-time weight of the material. This achieves the weighing ratio. Using a combination of three or four weighing sensors not only improves weighing stability but also ensures that even if a single sensor fails, the system can still alarm and maintain basic operation, enhancing reliability.

[0021] Considering that the weighing module is highly susceptible to environmental vibrations, such as the operation of nearby equipment, high-performance shock absorbers, such as damping springs or air-floating platforms, can be installed.

[0022] The receiving part 11 has a bucket-shaped structure, such as a cone, and its cone angle should be greater than the repose angle of each main material to prevent bridging blockage. The premixing part 12 is a vertical tubular structure coaxial with the receiving part 11, which can ensure smooth material flow. Multiple main material inlets are evenly distributed circumferentially corresponding to the cone surface area of ​​the receiving part 11.

[0023] The receiving part 11 is separately configured from the main material feeding part 10 and the premixing part 12, and the receiving part 11 is rotatable along its own axis. Radial guide plates 111 are evenly distributed in a ring on the conical surface area of ​​the receiving part 11. This separate, rotating design allows the receiving part to rotate independently, becoming an active mixing component. During rotation, the guide plates 111 disperse and scatter the main material, making it more dispersed as it falls, preventing clumping or concentration, and avoiding mixing dead zones. When multiple main materials fall sequentially, although the inlet of each main material is eccentric relative to the premixing part 12, the rotation of the receiving part and the diversion effect of the guide plates ensure that each main material forms a uniformly distributed material flow in the premixing part as it falls, further improving the premixing uniformity of the main and auxiliary materials.

[0024] Multiple auxiliary material inlets are evenly distributed around the premix section 12, allowing the auxiliary materials to be injected from multiple directions for more uniform mixing with the main material. Furthermore, an auxiliary material air curtain is formed, ensuring that all parts of the main material column are evenly coated, eliminating mixing dead zones.

[0025] The nozzle of the auxiliary material inlet is tilted downwards at a small angle. This allows the auxiliary material to be injected in roughly the same direction as the main material, avoiding violent collisions and rebounds. The auxiliary material has a horizontal initial velocity, giving it a longer relative motion path for mixing as it falls with the main material. This utilizes gravity, reducing energy consumption. The overall flow of the auxiliary material is downward, making it less likely to deposit at the nozzle. The airflow also helps the mixed material fall faster, improving batching efficiency.

[0026] Each of the main material inlets is equipped with a controllable valve, and the blowing assembly 4 is equipped with a valve with adjustable flow rate; the weighing module of the weighing mechanism 6 is electrically connected to the control module to collect and feed back the real-time weight of the falling material to the control module, and the control module is electrically connected to multiple valves to control the opening and closing or the degree of opening of the valves.

[0027] The valve at the main material inlet is a solenoid valve 3, which has a fast response speed and is suitable for controlling the flow of solid materials.

[0028] The valve of the spray assembly 4 is a proportional valve 41, which can precisely adjust the gas flow rate, thereby controlling the amount and speed of the auxiliary material injected.

[0029] Based on this unique structure, more precise proportioning functions can be achieved. For example, the main ingredients can be added sequentially, while auxiliary ingredients are continuously added via jetting. The process is controlled by feedback from a weighing mechanism.

[0030] In this process, the main ingredients are weighed individually and sequentially. Each time a new ingredient is added, the weighing mechanism below measures the step increase in weight. The control module determines whether the weight has reached a preset value, and then closes the solenoid valve for the current ingredient and opens the solenoid valve for the next ingredient. This is a static weighing method with extremely high accuracy, reaching ±0.1% or even higher. This is the foundation for achieving high-quality film production.

[0031] Throughout the main ingredient addition process, auxiliary materials are continuously injected through a spray assembly. The control module focuses not on the absolute weight of the auxiliary materials, but on the rate of increase in the total weight displayed by the weighing mechanism—that is, the rate of weight change over time. The control module compares the real-time weight growth rate with the preset auxiliary material ratio growth rate. By adjusting the opening of the proportional valve, the airflow rate of the spray is changed, thereby controlling the intake and injection rate of the auxiliary materials to ensure that the actual growth rate matches the preset value. This is a dynamic weighing method that achieves precise proportioning of continuous fluids. Employing dynamic control linked to the total weight increase, the auxiliary material addition rate is directly linked to the total amount of main ingredient added. For example, if the preset auxiliary material ratio is 2%, then for every 100kg increase in total weight, 2kg of auxiliary material should be added. The system achieves this goal by controlling the growth rate, avoiding errors caused by changes in material density and humidity in traditional volumetric or timed addition methods.

[0032] This solution is particularly suitable for film production batching that requires the addition of trace amounts of auxiliary materials (such as color masterbatches). Traditional weighing batching devices weigh the main material and auxiliary materials sequentially, stack them in layers, and then send them together to a mixing device for mixing. This method suffers from uneven mixing, especially of auxiliary materials. Conventional mixing equipment, such as horizontal ribbon mixers, is designed for processing materials in relatively equal proportions. When a component (such as an auxiliary material) accounts for a very small proportion, it is difficult for it to be mechanically captured and distributed throughout the mixing space in a short time. The mixing may never reach a statistically uniform state, or the time required to achieve uniformity may be very long. Moreover, auxiliary materials are mostly powdery materials, which are prone to static electricity or are inherently sticky. Small amounts of auxiliary materials will first agglomerate into small clumps instead of being evenly dispersed. These small clumps are surrounded by a large number of main material particles, making it difficult to break them up under mechanical stirring. Ultimately, they exist in the form of clumps within the particles, resulting in severe uneven distribution, which has a significant impact on the quality of film production.

[0033] This solution pre-mixes auxiliary and main ingredients during the batching process. The auxiliary ingredients are mixed with the falling main ingredients via gas injection, which not only prevents clumping and improves powder particle dispersion but also ensures more uniform mixing with the main ingredients. Subsequent mechanical mixing only needs to ensure uniform mixing of the main ingredients, significantly reducing the load on subsequent mechanical mixing and shortening the time required for uniform mixing, thus increasing efficiency. Combined with closed-loop feedback control for weighing, it does not affect the proportioning accuracy of the main ingredients; in fact, the proportioning accuracy of the auxiliary ingredients is even higher.

[0034] The above are merely preferred embodiments of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A premixed batching device for thin film production, characterized in that: It includes a premixing mechanism (1), the top of which is a main material feeding section (10) with several main material feeding ports. A main material silo (2) is provided above the premixing mechanism (1) corresponding to each of the main material feeding ports. The premixing mechanism (1) also includes an upper receiving part (11) and a lower premixing part (12). The receiving part (11) is used to receive and guide the falling main material into the premixing part (12). The premixing section (12) has an auxiliary material inlet on its side wall. The auxiliary material inlet is connected to the auxiliary material silo (5) through a spraying assembly (4). The spraying assembly (4) is used to form a negative pressure to suck up the auxiliary material and spray it into the premixing section (12) to mix with the vertically falling main material. A weighing mechanism (6) is provided below the premixing section (12) to receive the premixed material and weigh the real-time weight of the material.

2. The premixed batching device for thin film production according to claim 1, characterized in that: The receiving part (11) is a bucket-shaped structure, the premixing part (12) is a vertical tubular structure coaxial with the receiving part (11), and the multiple main material inlets are evenly distributed circumferentially in the conical area of ​​the receiving part (11).

3. The premixed batching device for thin film production according to claim 2, characterized in that: The receiving part (11) is separately arranged from the main material feeding part (10) and the premixing part (12), and the receiving part (11) is rotatably arranged along its own axis. The conical area of ​​the receiving part (11) is uniformly distributed with radial guide plates (111).

4. A premixed batching device for thin film production according to claim 1, characterized in that: Multiple auxiliary material inlets are evenly distributed around the premix section (12).

5. A premixed batching device for thin film production according to claim 4, characterized in that: The discharge end of the auxiliary material inlet is inclined downward at a small angle.

6. A premixed batching device for thin film production according to claim 1, characterized in that: Each of the main material inlets is equipped with a controllable valve, and the blowing assembly (4) is equipped with a valve with adjustable flow rate; the weighing module of the weighing mechanism (6) is electrically connected to the control module to collect and feed back the real-time weight of the falling material to the control module, and the control module is electrically connected to multiple valves to realize the control of the valve opening and closing or the opening degree.

7. A premixed batching device for thin film production according to claim 6, characterized in that: The valve at the main material inlet is a solenoid valve (3).

8. A premixed batching device for thin film production according to claim 7, characterized in that: The valve of the jetting assembly (4) is a proportional valve (41).

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