Quantitative packing device for glue production

Abstract

This utility model relates to the technical field of quantitative packaging devices for adhesive production, specifically disclosing a quantitative packaging device for adhesive production. The device includes a main body with a feeding pipe inside. A first support block is located at the top of the feeding pipe, and a second support block is located at the bottom. A rotating scraping assembly is positioned between the first and second support blocks. A flow sensor is fixedly installed at the bottom of the second support block. When the flow sensor detects a decrease in the discharge rate, the rotating scraping assembly drives the scraper to rotate and rise, performing a scraping action. This utility model monitors the discharge rate through a flow sensor, and automatically activates a drive device when the flow rate decreases, driving the scraper to rotate and rise, thus dynamically scraping away residual adhesive from the inner wall of the feeding pipe. This design effectively prevents material accumulation and blockage, ensures stable discharge, and improves metering accuracy.

Description

Technical Field

[0001] This utility model relates to the technical field of quantitative packaging devices for glue production, specifically a quantitative packaging device for glue production. Background Technology

[0002] In the adhesive production process, quantitative packaging is a crucial step, especially for high-viscosity adhesives, whose poor flowability and tendency to adhere pose significant challenges to accurate metering and continuous dispensing. To ensure consistent packaging weight, it is necessary to ensure a stable dispensing flow rate each time; therefore, sensor monitoring and automatic control technologies are often employed.

[0003] In actual operation, when the glue passes through the feeding pipe, although the risk of main body adhesion residue is much lower than that of high viscosity glue due to its good fluidity, the residue of glue additives can still independently cause the formation of a residue layer in the pipe. Unlike high viscosity glue, which "adheres immediately in large quantities", the additive residue of water-based glue accumulates slowly and gradually. However, after long-term operation, it will still lead to a reduction in the cross-sectional area of ​​the pipe flow, affecting the accuracy of quantitative packaging. Therefore, we propose a quantitative packaging device for glue production. Summary of the Invention

[0004] The purpose of this invention is to provide a quantitative packaging device for adhesive production, in order to solve the problem mentioned in the background art that the residue of adhesive additives can still independently cause the formation of a residue layer in the pipeline. Unlike high-viscosity adhesives, which "adhere to a large amount immediately", the additive residue of water-based adhesives accumulates slowly and gradually. However, after long-term operation, it will still lead to a reduction in the cross-sectional area of ​​the pipeline flow, affecting the accuracy of quantitative packaging.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a quantitative packaging device for glue production, comprising a quantitative packaging device body, a feeding pipe inside the quantitative packaging device body, a first support block at the top of the feeding pipe, the outer side of the first support block being fixed to the inner wall of the feeding pipe by a connecting rod, the top of the first support block being conical, a second support block at the bottom of the feeding pipe, the outer side of the second support block being fixed to the inner wall of the feeding pipe by a connecting rod, a rotary scraping assembly between the first support block and the second support block, a flow sensor being fixedly installed at the bottom of the second support block, the rotary scraping assembly including a ball screw, a spline on the outer side of the ball screw, and a scraper retractably mounted on the outer side of the spline; when the flow sensor detects a decrease in the output, the rotary scraping assembly drives the scraper to rotate and rise, and the scraper performs a rotary scraping action.

[0006] The first support block has a motor fixedly installed inside by a support platform. The output shaft of the motor is fixedly connected to the top of the ball screw. The bottom of the first support block is provided with a first telescopic sealing sleeve through a bearing.

[0007] The bottom end of the first telescopic sealing sleeve is fixedly provided with a fixing ring, the bottom end of the fixing ring is fixedly provided with a second telescopic sealing sleeve, and the bottom end of the second telescopic sealing sleeve is rotatably set at the top end of the second support block through a bearing.

[0008] The bottom end of the ball screw is rotatably mounted on the top of the second support block via a bearing. The first telescopic sealing sleeve, the fixing ring, and the second telescopic sealing sleeve are all fitted on the outside of the ball screw. A support rod is fixedly mounted on the outside of the spline.

[0009] The support rod passes through the fixing ring and extends into the inside of the feeding pipe. An air chamber is opened inside the support rod, and a valve plate is installed inside the air chamber. A control rod is fixedly installed at one end of the valve plate.

[0010] One end of the control rod passes through the support rod and extends into the inside of the feeding pipe. One side of the scraper is fixedly installed at one end of the control rod. The side of the valve plate close to the inner wall of the feeding pipe is attached to the inner wall of the feeding pipe. One side of the scraper is a wedge-shaped scraper structure.

[0011] The feeding pipe is an inverted trapezoidal platform shape.

[0012] This utility model has at least the following beneficial effects:

[0013] This invention uses a flow sensor to monitor the discharge rate in real time. When a decrease in flow is detected, the drive motor automatically starts, rotating the ball screw. The ball screw, through spline transmission, drives the scraper to simultaneously rotate and lift, creating a spiral scraping action. This effectively removes high-viscosity adhesive residue adhering to the inner wall of the feeding pipe. This structure achieves intelligent sensing and proactive response to the material flow state, avoiding uneven discharge or blockage caused by material accumulation. Compared to single-motion scraping, the rotary-lifting scraping method is more thorough and has a wider coverage area, making it particularly suitable for cleaning variable-diameter pipes. The combined motion of the scraper can promptly restore the flow cross-section, ensuring stable discharge and significantly improving packaging metering accuracy. Simultaneously, this automatic cleaning mechanism reduces manual intervention, improves the continuous operation capability of the equipment, and lowers maintenance costs. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the rotary scraping assembly structure of this utility model;

[0016] Figure 3 This is a schematic diagram of the overall side view structure of this utility model;

[0017] Figure 4 This is an enlarged schematic diagram of the structure at point A of this utility model.

[0018] In the figure: 1. Main body of quantitative packaging device; 2. Feeding pipe; 3. First support block; 4. Second support block; 5. Rotary scraping assembly; 501. Ball screw; 502. Spline; 503. Scraper; 504. Motor; 505. First telescopic sealing sleeve; 506. Fixing ring; 507. Second telescopic sealing sleeve; 508. Support rod; 509. Air chamber; 510. Valve plate; 511. Control rod; 6. Flow sensor. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figures 1-4 This utility model provides a technical solution: a quantitative packaging device for adhesive production, including a quantitative packaging device body 1. A vertically arranged feeding pipe 2 is provided inside the quantitative packaging device body 1. The feeding pipe 2 is generally in the shape of an inverted trapezoid, i.e., the upper diameter is larger than the lower diameter, which facilitates the smooth flow of high-viscosity adhesive under gravity and reduces material accumulation on the pipe wall. A first support block 3 is fixedly installed at the top of the feeding pipe 2. The first support block 3 is connected to the inner wall of the feeding pipe 2 by multiple connecting rods evenly distributed along the circumference, ensuring structural stability. The top of the first support block 3 has a conical structure, used to guide the adhesive to flow towards the center of the pipe, preventing material from stagnating at the top edge. A second support block 4 is provided at the bottom of the feeding pipe 2. The second support block 4 is also fixed to the inner wall of the feeding pipe 2 by connecting rods, providing bottom support. A flow sensor 6 is installed at the bottom of the second support block 4, used to monitor the flow rate of adhesive discharged from the feeding pipe 2 in real time and transmit the flow signal to an external control system.

[0021] A rotary scraping assembly 5 is provided between the first support block 3 and the second support block 4 to remove adhesive residue adhering to the inner wall of the feeding pipe 2, preventing blockage and ensuring metering accuracy. The rotary scraping assembly 5 includes a vertically arranged ball screw 501. The top end of the ball screw 501 is fixedly connected to the output shaft of a motor 504 located inside the first support block 3, and the bottom end is rotatably supported at the top center of the second support block 4 through a bearing, achieving stable support at both ends. The outer side of the ball screw 501... The system is equipped with a spline 502, which can slide axially along the ball screw 501 but can transmit torque synchronously. At least one support rod 508 is fixedly connected to the outer periphery of the spline 502. The support rod 508 extends radially and passes through the fixing ring 506 before extending into the inside of the feeding pipe 2. A scraper 503 is connected to the end of the support rod 508 away from the spline 502. The scraper 503 has a wedge-shaped scraper structure, and one edge of it is attached to the inner wall of the feeding pipe 2, which can effectively scrape off the adhesive during the movement.

[0022] Furthermore, the scraper 503 is linked to the valve plate 510 inside the support rod 508 via the control rod 511. The support rod 508 has an air chamber 509 inside, and the valve plate 510 is located within the air chamber 509 and can swing under air pressure or mechanical thrust. When the scraper 503 extends outward, the control rod 511 drives the valve plate 510 to move synchronously, causing one end to adhere to the inner wall of the feeding pipe 2, thus playing a local throttling and regulating role and assisting in improving the flow state. A sealing and protective structure is also fitted around the outer periphery of the ball screw 501. The structure includes a first telescopic sealing sleeve 505, a fixing ring 506, and a second telescopic sealing sleeve 507 connected sequentially from top to bottom. The top end of the first telescopic sealing sleeve 505 is connected to the bottom of the first support block 3 via a bearing, and the bottom end is fixed to the fixing ring 506. The top end of the second telescopic sealing sleeve 507 is connected to the fixing ring 506, and the bottom end is connected to the top of the second support block 4 via a bearing. This sealing structure can protect the internal transmission components from glue contamination and can also adapt to the length changes when the ball screw 501 drives the spline assembly to move up and down.

[0023] During use, the adhesive enters the feeding pipe 2 from the upper inlet of the quantitative packaging device body 1. Because the feeding pipe 2 has an inverted platform structure, i.e., a conical flow channel that is wider at the top and narrower at the bottom, and is equipped with a conical first support block 3 located at the top of the pipe, the adhesive naturally converges towards the center along the conical surface under gravity. This effectively avoids the phenomenon of high-viscosity materials forming "wall-hanging" or "bridging" at the upper edge of the pipe, ensuring that the initial flow of the material is uniform and stable. After being guided by the first support block 3, the adhesive continues to flow downwards and enters the packaging container through the outlet located at the bottom of the second support block 4. During this process, the flow sensor 6 installed at the bottom of the second support block 4 monitors the discharge volume or mass flow rate per unit time in real time and transmits the collected data. The flow data is continuously transmitted to the external control system (such as PLC or microcontroller) in the form of electrical signals. The control system has a preset standard flow threshold range to determine whether the current discharge status is normal. When the viscosity of the glue increases due to the decrease in ambient temperature, batch differences, or long-term operation, its fluidity deteriorates. Some glue is easy to adhere to the inner wall of the feeding pipe 2, especially forming a residual layer in the inclined section of the inverted trapezoidal platform structure, which reduces the effective flow cross-sectional area and causes the discharge flow rate to decrease. When the flow sensor 6 detects that the flow value is continuously lower than the preset lower limit threshold (for example, lower than 85% of the normal value for 3 consecutive seconds), it is determined to be "risk of material accumulation and blockage". The control system immediately issues an execution command to start the motor 504.

[0024] After receiving the start signal, the motor 504 begins to rotate in the forward direction. Its output shaft drives the ball screw 501 to rotate synchronously. The rotational motion of the ball screw 501 is converted into axial displacement and torque output through the spline 502 that mates with it. While rotating with the ball screw 501, the spline 502 slowly rises along its thread lead direction (or is designed to descend according to the thread direction, preferably an upward cleaning path). A support rod 508 is fixedly connected to the outer periphery of the spline 502. Therefore, the support rod 508 rotates and moves axially together with the spline 502, forming a spiral propulsion trajectory. The end of the support rod 508 is connected to the scraper 503 through the control rod 511, and is linked to the action of the control valve plate 510. As the support rod 508 moves axially, the control rod 511 pushes... The scraper 503 extends radially outward, causing the edge of its wedge-shaped scraper structure to gradually adhere to the inner wall surface of the feeding pipe 2. At the same time, the valve plate 510 swings out from the air chamber 509 under the drive of the control rod 511, and its free end also approaches the inner wall of the pipe, forming a local annular throttling structure. During this combined motion, the scraper 503 continuously scrapes the glue adhering to the inner wall of the pipe while rotating, pushing the residual material downward. Meanwhile, its spiral lifting path ensures that the entire inverted trapezoidal platform flow channel height range is thoroughly cleaned without any blind spots. The unfolding of the valve plate 510 forms a controllable flow channel contraction zone in a local area, generating a slight back pressure effect, which helps to break the static adhesion of the glue and promote the re-entry of the retained material into the mainstream area, thereby synergistically improving the cleaning efficiency.

[0025] Once the scraper 503 completes its set stroke (e.g., rises to near the bottom of the first support block 3), the control system determines that the cleaning action is complete. It then controls the motor 504 to reverse, causing the ball screw 501 to rotate in the opposite direction, resetting the spline 502 and the entire scraping assembly 5. During this process, the control lever 511 retracts, and the scraper 503 and valve plate 510 synchronously return to their initial non-working position, disengaging from the inner wall of the pipe to avoid obstructing normal flow. After resetting, the motor 504 stops running, and the system returns to standby mode. The flow sensor 6 continues to monitor the discharge flow rate. If the flow rate returns to the normal range, stable packaging operations are maintained. If the flow rate remains low, the control system can automatically trigger a second cleaning cycle or issue an alarm signal to prompt manual intervention. Preferably, the control system can also intelligently adjust the start-stop frequency, rotation speed, lifting stroke and scraping number of motor 504 according to the historical flow change trend to achieve adaptive material cleaning control. For example, in the continuous production process of high viscosity glue, the system can be set to automatically perform a preventive scraping operation after a certain amount of packaging is completed (such as every 100 packs) to prevent material accumulation. In addition, the multi-segment telescopic sealing structure composed of the first telescopic sealing sleeve 505, the fixing ring 506 and the second telescopic sealing sleeve 507 extends or compresses synchronously during the up and down movement of the ball screw 501, always forming an effective protection for the internal transmission components, preventing glue from seeping into the spline 502, support rod 508 and other precision mating parts, ensuring the long-term reliability and maintenance cycle of the equipment.

[0026] By installing a flow sensor 6 and a rotary lifting scraping mechanism consisting of a ball screw 501, a spline 502, and a scraper 503 in the quantitative packaging device for adhesive production, real-time sensing and active intervention of the flow state of high-viscosity materials are achieved. This has significant technological advancements and practical value. When the adhesive flows in the feeding pipe 2, due to its high viscosity, it easily forms an adhesion layer on the inner wall of the pipe, especially in the inclined section of the inverted trapezoidal platform. As the running time increases, residual adhesive accumulates, resulting in a reduction in the effective flow cross-sectional area and a gradual decrease in the output. The flow sensor 6 continuously monitors the flow change at the discharge end. Once it detects that the output per unit time is lower than the preset threshold, it sends a low flow signal to the external control system, triggering the cleaning mechanism. This closed-loop feedback design enables the device to have self-diagnosis and self-response capabilities, avoiding the inefficiency and measurement deviation problems caused by traditional manual inspection or timed cleaning.

[0027] Upon receiving the signal, the control system starts the motor 504, driving the ball screw 501 to rotate. The rotational motion of the ball screw 501 is converted into axial displacement and synchronous torque output through the spline 502, driving the support rod 508, control rod 511, and scraper 503, which are fixedly connected to it, to rotate and move up and down axially. Because the spline 502 allows axial sliding but can reliably transmit torque, it ensures that the scraper 503 maintains a stable rotational state during the lifting process, forming a continuous spiral scraping path. Driven by the combined action of ball screw 501 and spline 502, the feed pipe 2 rotates and lifts from bottom to top (or from top to bottom, depending on the design) along its inner wall. The edge of its wedge-shaped scraper shears and peels off the adhesive, effectively removing residual material and restoring the original flow capacity of the pipe. Compared with static scrapers or single lifting structures, this rotary lifting scraping method has a larger cleaning coverage and stronger peeling force, and is especially suitable for variable diameter structures such as inverted trapezoidal platform channels, enabling full-height, no-dead-angle cleaning.

[0028] In addition, the movement of scraper 503 is precisely controlled by mechanical transmission. The lifting speed, rotation frequency and stroke can be adjusted by the speed and running time of motor 504 to adapt to the cleaning needs under different viscosity and flow conditions, thereby improving the versatility and intelligence of the device. This structure also significantly improves the accuracy and stability of quantitative packaging. The scraping action is initiated in the early stage of the decrease in output to prevent further deterioration of material accumulation and avoid flow interruption or metering deviation caused by sudden blockage.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A quantitative packaging device for adhesive production, characterized in that: The device includes a main body for quantitative packaging. An internal feeding pipe is provided within the main body. A first support block is located at the top of the feeding pipe, and its outer side is fixed to the inner wall of the feeding pipe via a connecting rod. The top of the first support block is conical. A second support block is located at the bottom of the feeding pipe, and its outer side is fixed to the inner wall of the feeding pipe via a connecting rod. A rotary scraping assembly is located between the first and second support blocks. A flow sensor is fixedly installed at the bottom of the second support block. The rotary scraping assembly includes a ball screw with a spline on its outer side. A scraper is retractably mounted on the outer side of the spline. When the flow sensor detects a decrease in the output, the rotary scraping assembly drives the scraper to rotate and rise, performing a scraping action.

2. The quantitative packaging device for adhesive production according to claim 1, characterized in that: A motor is fixedly installed inside the first support block via a support platform. The output shaft of the motor is fixedly connected to the top of the ball screw. A first telescopic sealing sleeve is rotatably installed at the bottom of the first support block via a bearing.

3. The quantitative packaging device for adhesive production according to claim 2, characterized in that: A fixing ring is fixedly provided at the bottom end of the first telescopic sealing sleeve, and a second telescopic sealing sleeve is fixedly provided at the bottom end of the fixing ring. The bottom end of the second telescopic sealing sleeve is rotatably mounted on the top end of the second support block via a bearing.

4. The quantitative packaging device for adhesive production according to claim 3, characterized in that: The bottom end of the ball screw is rotatably mounted on the top end of the second support block via a bearing. The first telescopic sealing sleeve, the fixing ring, and the second telescopic sealing sleeve are all sleeved on the outside of the ball screw. A support rod is fixedly mounted on the outside of the spline.

5. The quantitative packaging device for adhesive production according to claim 4, characterized in that: The support rod passes through the fixing ring and extends into the interior of the feeding pipe. An air chamber is provided inside the support rod, and a valve plate is provided inside the air chamber. A control rod is fixedly provided at one end of the valve plate.

6. The quantitative packaging device for adhesive production according to claim 5, characterized in that: One end of the control rod passes through the support rod and extends into the interior of the feeding pipe. One side of the scraper is fixedly installed at one end of the control rod. The side of the valve plate near the inner wall of the feeding pipe is attached to the inner wall of the feeding pipe. One side of the scraper has a wedge-shaped scraper structure.

7. The quantitative packaging device for adhesive production according to claim 1, characterized in that: The feeding pipe is in the shape of an inverted trapezoidal platform.

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