Multifunctional filling and sealing machine and filling method

Abstract

This application provides a multifunctional filling and sealing machine and filling method, relating to the field of medical device packaging technology. It includes a filling module, a conveying module, a positioning module, a heat-sealing module, and a control module. The filling module includes a filling head and a filling head lifting mechanism. The positioning module includes a positioning clamp corresponding to the filling head, a positioning clamp driving mechanism, a support base, and a support base translation mechanism. The positioning clamp is located to the side of the filling head, and the support base is located directly below the filling head. The heat-sealing module includes a heat-sealing head, with heat-sealing head translation mechanisms connected to its front and rear ends. At least two sets of filling, heat-sealing, and positioning modules are provided. The conveying module includes a conveyor belt passing under all the filling heads, with a buffer baffle in front of the conveyor belt. This application uses the rearward movement of the support base to slowly tip the packaging bag over, and then utilizes the buffer baffle to absorb most of the impact force, converting free fall motion into sliding motion along an inclined plane, effectively reducing the impact force.

Description

Technical Field

[0001] This application relates to the field of medical device packaging technology, and more specifically, to a multifunctional filling and sealing machine and filling method. Background Technology

[0002] Flexible bag filling and sealing machines are among the most widely used packaging equipment in the food, pharmaceutical, and daily chemical industries, primarily used for flexible bag packaging of liquids and semi-fluid materials. Compared to traditional bottled and canned packaging, flexible bag packaging offers significant advantages such as lighter weight, lower cost, convenient transportation, and easy opening.

[0003] After the existing soft bag filling and sealing machine has finished filling and sealing, there are several ways to transfer the finished product, including: (1) Direct handling scheme: A typical example of this scheme is a Chinese utility model patent for an intermittent plastic packaging bag sealing machine (publication number CN220501198U). After the equipment finishes sealing, the packaging bag is lifted up and then manually removed. Considering the sealing of the packaging bag, this scheme is a relatively safe material handling scheme, but the degree of automation is low, and there is a risk of burns when manually transferring the packaging bag that has just been heat-sealed.

[0004] (2) After sealing, the bag falls freely to the conveyor belt and is transported away from the workstation by the conveyor belt: A typical example of this scheme is a PE tubular bag sealing machine (publication number CN219970148U) of Chinese Utility Model Patent. Its conveying device includes two conveyor shafts set on the frame in the horizontal direction, a conveyor belt covering and connected to the two conveyor shafts, and a conveyor motor fixedly installed on the frame in the horizontal direction. The two ends of the conveyor shafts are rotated and supported on the frame. The output shaft of the conveyor motor is connected to the end of one of the conveyor shafts. The conveyor belt is located directly below the hopper. After the tubular bag is filled with material, the clamp cylinder releases the tubular bag, and the tubular bag falls onto the conveyor belt. The conveyor motor works to drive the conveyor belt to move and transport the tubular bag to other places.

[0005] This type of solution is suitable for lightweight products that are not sensitive to drop impacts. However, liquids, as incompressible phases, will transfer all the impact force to the bag when they are the contents. In particular, the interface of the packaging that has just been heat-sealed has not been completely cooled, which poses a risk of packaging failure.

[0006] (3) The packaging bag directly contacts the conveyor belt during sealing, and the conveyor belt stops running during sealing: A typical example of this type of solution is a Chinese utility model patent for a food packaging production sealing device (publication number CN223291221U). By intermittently driving the conveyor belt to rotate, the conveyor belt can be temporarily stopped when the packaging bag is sent to the underside of the nickel-chromium electric heating flat strip. When the intermittent drive component stops driving the conveyor belt, the nickel-chromium electric heating flat strip is squeezed downward to seal the packaging bag. This solution does not have the problem of sealing failure, but the conveyor belt must be started and stopped frequently, resulting in large mechanical impact, which significantly affects the service life of the equipment. Moreover, its conveyor belt cannot handle multiple stations receiving bags at the same time with different timing.

[0007] (4) Transfer of packaging bags by special bag transfer process: A typical example of this type of solution is the Chinese utility model patent positioning infusion soft bag transfer device (publication number CN203902905U). As an auxiliary device of the filling and sealing machine, it significantly increases the complexity of the equipment and also has the same multi-station synchronization problem as in solution 3. If there are multiple stations with different timing (or process progress), the transfer device cannot be applied.

[0008] The purpose of this application is to overcome the above-mentioned defects of the prior art and provide a multi-functional filling and sealing machine with simple and compact structure, high production efficiency, good sealing quality, stable bag drop and strong compatibility. Summary of the Invention

[0009] To address the aforementioned problems, this application provides a multi-functional filling and sealing machine, comprising a machine body, a filling module, a conveying module, a positioning module, a heat sealing module, and a control module. The control module is electrically connected to the filling module, the conveying module, the positioning module, and the heat sealing module. The filling module includes a filling head and a filling head lifting mechanism that is driven and connected to the filling head above the filling head; the positioning module includes a positioning clamp, a positioning clamp driving mechanism, a support base, and a support base translation mechanism that is driven and connected to the support base behind the support base. The positioning clamp is located on the side of the filling head, and the support base is located directly below the filling head. The heat sealing module includes a pair of symmetrically arranged heat sealing heads in front of and behind the filling head. The pair of symmetrically arranged heat sealing heads are respectively connected to the heat sealing head translation mechanism in front and behind. The filling module, heat sealing module and positioning module are provided in at least two sets. The conveying module includes a conveyor belt passing under all the filling heads, and a buffer baffle is provided in front of the conveyor belt.

[0010] Optionally, it also includes a manual execution switch electrically connected to the control module; The filling head, filling head lifting mechanism, positioning clamp, positioning clamp drive mechanism, support base, support base translation mechanism, heat sealing head, and heat sealing head translation mechanism are all located inside the filling and sealing machine body; The manual operation switch is located on the outside of the filling and sealing machine.

[0011] Optionally, it also includes a pneumatic module, which includes an air source, a pneumatic dual unit, a solenoid valve group, and a pressure regulating valve group; the output end of the air source is connected to the input end of the pneumatic dual unit, and the output end of the pneumatic dual unit is connected to the input end of the solenoid valve group and the input end of the pressure regulating valve group respectively; multiple output ends of the solenoid valve group are respectively connected to the air circuits of the cylinder of the filling head lifting mechanism, the bag clamping driving cylinder 202 of the positioning clamp driving mechanism, the cylinder of the support base translation mechanism, the cylinder of the heat sealing head translation mechanism, and the pneumatic control switch of the positioning clamp; the control ends of the solenoid valve group and the pressure regulating valve group are respectively electrically connected to the control module.

[0012] Optionally, the front-to-back distance between the bottom of the buffer baffle and the positioning position of the positioning module on the packaging bag is less than the height of the packaging bag, and the front-to-back distance between the top of the buffer baffle and the positioning position of the positioning module on the packaging bag is greater than the height of the packaging bag. The tilt angle of the buffer baffle is 10°-30°.

[0013] Optionally, the filling module also includes a transfer tank and a liquid delivery pipeline. The transfer tank is equipped with an inlet, a pressurization port and an outlet. The pressurization port is connected to the output end of the pressure regulating valve group, and the outlet is connected to the filling head through the liquid delivery pipeline.

[0014] Optionally, the liquid delivery pipeline includes at least two parallel branch pipelines, one end of each branch pipeline being connected to the outlet of the transfer storage tank, and the other end being connected to the filling head via a metering control valve.

[0015] Optionally, the positioning module also includes a bag clamping drive cylinder, which is connected to the positioning clamp to drive the positioning clamp to open and close.

[0016] Optionally, each heat sealing head is equipped with a heating tube and a temperature sensor. The heat sealing head is mounted on the end of the power output rod of the heat sealing head translation mechanism via a heat sealing head mounting plate. A pressure adjusting spring is provided between the heat sealing head and the heat sealing head mounting plate. A horizontal positioning plate is provided at the bottom of the heat sealing head mounting plate, and the heat sealing head is mounted on the horizontal positioning plate.

[0017] Optionally, the control module includes a PLC controller, a human-machine interface unit, and a sensor group. The sensor group includes a liquid level sensor for the transfer tank, a heat sealing temperature sensor, and multiple stroke sensors. The stroke sensors are used to detect the positioning status of the filling head lifting, the heat sealing head opening and closing, the positioning clamp opening and closing, and the support seat translation.

[0018] This application also provides a filling method for a multi-functional filling and sealing machine, characterized in that it is performed using any of the aforementioned multi-functional filling and sealing machines, and includes the following steps: S1: Place the opening of the packaging bag to be filled and sealed on the outside of the filling head, and place the bottom of the packaging bag to be filled and sealed on the support. S2: The positioning clip holds the packaging bag to be filled and sealed; S3: The filling head injects liquid into the packaging bag to be filled; S4: After filling is completed, the filling head lifting mechanism will pull the filling head upwards away from the packaging bag to be sealed; S5: The heat sealing head translation mechanism drives the paired heat sealing heads to move relative to each other to the packaging bag to be sealed and then begins heat sealing. After the heat sealing is completed, the heat sealing head translation mechanism drives the paired heat sealing heads to move in opposite directions away from the packaging bag that has been filled. S6: As the positioning clamp releases the sealed packaging bag, the support seat translation mechanism drives the support seat to move backward, causing the sealed packaging bag to tilt forward and fall onto the support seat. After falling onto the support seat, the packaging bag first contacts the buffer baffle and then falls onto the conveyor belt. S7: The support seat translation mechanism drives the support seat to move forward and return to directly below the filling head, and the filling head lifting mechanism drives the filling head to move downward and return to the original filling position. S8: Repeat steps S1-S7 above.

[0019] The beneficial effects of the multifunctional filling and sealing machine and filling method provided in this application are as follows: (1) The filling module, heat sealing module and positioning module are set up one by one, and each has at least two sets, which are installed on the body of the filling and sealing machine. The control module controls multiple sets of modules to independently complete their respective filling, positioning and heat sealing actions. Multiple sets of modules work in parallel, and can process the filling and sealing process of multiple packaging bags at the same time, which greatly improves the production efficiency of the equipment. The production capacity can be flexibly adjusted according to the demand. Through modular parallel design, the original serial process is transformed into a parallel process, eliminating the process waiting time of single station equipment and realizing continuous production.

[0020] (2) The support seat is located directly below the filling head and is connected to the support seat translation mechanism. The buffer baffle is located in front of the conveyor belt. The support seat translation mechanism drives the support seat to move backward. With the release action of the positioning clamp, the packaging bag tilts forward. The buffer baffle receives the falling packaging bag and guides it onto the conveyor belt. After the filling is completed, the positioning clamp releases the packaging bag and the support seat pulls back. The packaging bag flips forward under the action of gravity and friction. It first hits the buffer baffle and then slides down the baffle onto the conveyor belt. This greatly reduces the impact force when the packaging bag falls, avoids bag deformation and damage, and ensures the consistency of the bag's landing position, which is convenient for the automation of subsequent processes. By moving the support seat backward, the packaging bag slowly flips over. The buffer baffle absorbs most of the impact force, converting the free fall motion into sliding motion along the inclined plane, which effectively reduces the impact force. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0022] Figure 1 This is a first-angle perspective view of the multi-functional filling and sealing machine provided in the embodiments of this application; Figure 2 yes Figure 1 Enlarged view of point A; Figure 3 This is a second-angle perspective view of the multifunctional filling and sealing machine provided in the embodiments of this application; Figure 4 yes Figure 3 Enlarged view of point B; Figure 5 This is a side view schematic diagram of the multi-functional filling and sealing machine provided in the embodiments of this application; Figure 6 This is a third-angle perspective view of the multi-functional filling and sealing machine provided in the embodiments of this application; Figure 7 This is a fourth-angle perspective view of the multifunctional filling and sealing machine provided in the embodiments of this application; Figure 8 This is a front view schematic diagram of the multi-functional filling and sealing machine provided in the embodiments of this application.

[0023] Explanation of reference numerals in the attached figures: 1-Filling and sealing machine body; 2-Buffer baffle; 3-Manual operation switch; 101-Filling head; 102-Filling head lifting cylinder; 103-Transfer storage tank; 104-Liquid inlet; 105-Pressure port; 106-Liquid outlet; 107-Observation window; 108-Level gauge; 109-Quantitative control valve; 110-Replenishment valve; 111-Liquid delivery pipeline; 201-Positioning clamp; 202-Bag clamping drive cylinder; 203-Support base; 204-Support base translation cylinder; 301 - Heat sealing head; 302 - Pressure adjusting spring; 303 - Heat insulation plate; 304 - Heat sealing head mounting plate; 305 - Heat sealing head translation cylinder; 401 - Conveyor Belt; 501-Control cabinet; 502-Control panel; 503-Filling control console; 504-Belt speed control knob; 505-Emergency stop button. Detailed Implementation

[0024] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0025] Example 1 In this application, the direction facing the operator is considered the front, the direction the operator is facing is considered the rear, the direction in which the conveyor belt 401 transports the packaging bag is considered the right, the opposite direction of the conveyor belt 401 transporting the packaging bag is considered the left, and both the left and right sides are considered the sides, the vertically upward direction is considered the top, and the vertically downward direction is considered the bottom.

[0026] like Figures 1-4 As shown, this embodiment provides a multi-functional filling and sealing machine, including a filling and sealing machine body 1, and also including a filling module, a conveying module, a positioning module, a heat sealing module and a control module. The control module is electrically connected to the filling module, the conveying module, the positioning module and the heat sealing module respectively.

[0027] The filling module includes a filling head 101 and a filling head lifting mechanism that is pulsatorically connected to the filling head 101 above it. In this embodiment, the filling head lifting mechanism is a filling head lifting cylinder 102, and the power output rod of the filling head lifting cylinder 102 is fixedly connected to the filling head 101. The positioning module includes a positioning clamp 201 corresponding to the filling head 101, a positioning clamp driving mechanism, a support base 203, and a support base translation mechanism that is pulsatorically connected to the support base 203 behind it. In this embodiment, the support base translation mechanism is a support base translation cylinder 204, and the power output rod of the support base translation cylinder 204 is fixedly connected to the support base 203. The positioning clamp 201 is located on the side of the filling head 101, and the support base 203 is located directly below the filling head 101.

[0028] In this embodiment, each filling head 101 is provided with positioning clips 201 on both sides to hold the two ends of the bag.

[0029] The heat sealing module includes heat sealing heads 301 symmetrically arranged in pairs before and after the filling head 101. Each of the symmetrically arranged heat sealing heads 301 is connected to a heat sealing head translation mechanism at the front and rear. Specifically, the heat sealing head 301 at the front is connected to a heat sealing head translation mechanism at its front, and the heat sealing head 301 at the rear is connected to a heat sealing head translation mechanism at its rear. The heat sealing head translation mechanism is a heat sealing head translation cylinder 305, and the transmission connection is that the heat sealing head 301 is fixedly connected to the power output rod of the heat sealing head translation cylinder 305.

[0030] In this embodiment, three sets of filling head 101, filling head lifting cylinder 102, heat sealing module and positioning module are provided; the conveying module includes a conveyor belt 401 passing under all filling heads 101, and a buffer baffle 2 is provided in front of the conveyor belt 401.

[0031] The multi-functional filling and sealing machine performs the following filling operations: S1: The opening of the packaging bag to be filled and sealed with an opening on one side is placed over the outside of the filling head 101, and the bottom of the packaging bag to be filled and sealed is placed on the support seat 203. S2: Positioning clip 201 clamps the packaging bag to be filled and sealed; S3: Filling head 101 injects liquid into the packaging bag to be filled; S4: After filling is completed, the filling head lifting cylinder 102 will pull the filling head 101 upward away from the packaging bag to be sealed; S5: The heat sealing head translation cylinder 305 drives the paired heat sealing heads 301 to move relative to each other to the packaging bag to be sealed and then start heat sealing. After the heat sealing is completed, the heat sealing head translation cylinder 305 drives the paired heat sealing heads 301 to move in opposite directions away from the packaging bag that has been filled. S6: While the positioning clamp 201 releases the sealed packaging bag, the support base translation cylinder 204 drives the support base 203 to move backward, causing the sealed packaging bag to tilt forward and fall onto the support base 203. After falling onto the support base 203, the packaging bag first contacts the buffer baffle 2 and then falls onto the conveyor belt 401. S7: The support base translation cylinder 204 drives the support base 203 to move forward and return to directly below the filling head 101, and the filling head lifting cylinder 102 drives the filling head 101 to move downward and return to the original filling position. S8: Repeat steps S1-S7 above.

[0032] The control module controls the actions of the positioning module, filling module, heat sealing module and conveying module according to the preset timing sequence. Under the unified scheduling of the control module, each module coordinates and cooperates to complete the entire filling and sealing process, executing steps S1 to S7 in sequence and repeating them.

[0033] The packaging bag to be filled is placed on the filling head 101, and the actions of clamping, filling, heat sealing and bag dropping are completed in sequence. Then it automatically returns to the initial state to prepare for the next cycle, realizing semi-automation of the filling and sealing process, and allowing multiple packaging bags to work in different sequences. For example, the three filling heads 101 in this embodiment are used for the application scenario of filling and sealing packaging bags of different specifications at the same time.

[0034] The filling module, heat sealing module, and positioning module are set up one-to-one and installed together inside the body 1 of the filling and sealing machine. The control module controls multiple modules to independently complete their respective filling, positioning, and heat sealing actions. Multiple modules work in parallel, and multiple packaging bags can be filled and sealed at the same time, which greatly improves the production efficiency of the equipment. The production capacity can be flexibly adjusted according to the demand. Through modular parallel design, parallel processes are implemented, saving waiting time compared to single-process equipment or single-station equipment.

[0035] The support base 203 is located directly below the filling head 101 and is connected to the support base translation mechanism. The buffer baffle 2 is located in front of the conveyor belt 401. The support base translation mechanism drives the support base 203 to move backward, which, in conjunction with the release action of the positioning clamp 201, causes the packaging bag to tilt forward. The buffer baffle 2 catches the falling packaging bag and guides it onto the conveyor belt 401. After filling and sealing, the positioning clamp 201 releases the packaging bag while the support base 203 retracts backward. Under the action of gravity and friction, the packaging bag flips forward, first hitting the buffer baffle 2, and then sliding down the baffle onto the conveyor belt 401. This significantly reduces the impact force when the packaging bag falls, avoids bag deformation and damage, and ensures the consistency of the bag's landing position, facilitating the automation of subsequent processes. By moving the support base 203 backward, the packaging bag slowly flips over, and the buffer baffle 2 absorbs most of the impact force, converting the free fall motion into sliding motion along the inclined plane, effectively reducing the impact force.

[0036] Example 2 like Figures 1-2 As shown, it also includes a manual execution switch 3 that is electrically connected to the control module; The filling head 101, filling head lifting mechanism, positioning clamp 201, positioning clamp driving mechanism, support base 203, support base translation mechanism, heat sealing head 301, and heat sealing head translation mechanism are all located inside the body 1 of the filling and sealing machine; The manual operation switch 3 is located outside the body 1 of the filling and sealing machine.

[0037] After the operator places the packaging bag to be filled and sealed around the filling head 101, the bottom of the bag is supported by the support seat 203. At this time, the operator can pull both hands out of the filling and sealing machine body 1 and turn on the manual execution switch 3 from the outside, thereby avoiding injury to the operator.

[0038] Example 3 like Figures 5-7As shown, it also includes a pneumatic module, which includes an air source, a pneumatic dual unit, a solenoid valve group, and a pressure regulating valve group. The output end of the air source is connected to the input end of the pneumatic dual unit, and the output end of the pneumatic dual unit is connected to the input ends of the solenoid valve group and the pressure regulating valve group, respectively. The multiple output ends of the solenoid valve group are respectively connected to the pneumatic control switch air circuits of the cylinder of the filling head lifting mechanism, the bag clamping driving cylinder 202 of the positioning clamp driving mechanism, the cylinder of the support base translation mechanism, the cylinder of the heat sealing head translation mechanism, and the positioning clamp 201. The control end of the solenoid valve group is electrically connected to the control module. The output end of the pressure regulating valve group is connected to the pressurization port 105 of the transfer storage tank 103.

[0039] The pneumatic module provides power to all pneumatic actuators, while the control module controls the timing of each cylinder's action via a solenoid valve assembly and the filling pressure of the transfer storage tank 103 via a pressure regulating valve assembly. Compressed air, after being filtered and pressure regulated by the pneumatic dual-unit, enters the solenoid valve assembly, which distributes it to each cylinder to drive its extension and retraction. The other path enters the pressure regulating valve assembly, where it is adjusted to a suitable pressure before being introduced into the transfer storage tank 103 for pressurized filling. This provides a stable and reliable power source, ensuring the consistency and accuracy of each cylinder's action, thereby improving filling precision and heat-sealing quality. Simultaneously, the pneumatic system features fast response, low maintenance costs, and suitability for continuous operation in industrial environments. The pneumatic dual-unit removes impurities and moisture from the compressed air, stabilizing the system pressure. The solenoid valve assembly enables precise switching of the air paths, ensuring accurate timing of actions. The pressure regulating valve assembly can precisely adjust the filling pressure to meet the filling requirements of different liquids and packaging bags of different sizes.

[0040] Example 4 like Figures 1-4 As shown, the front-to-back distance between the bottom of the buffer baffle 2 and the positioning position of the positioning module on the packaging bag is less than the height of the packaging bag, and the front-to-back distance between the top of the buffer baffle 2 and the positioning position of the positioning module on the packaging bag is greater than the height of the packaging bag. The tilt angle of the buffer baffle 2 is 10°-30°.

[0041] The buffer baffle 2 intercepts all packaging bags falling from the support 203 and guides them to slide smoothly onto the conveyor belt 401. Regardless of the falling speed, weight, and center of gravity of the packaging bags, all possible trajectories of their forward movement from the positioning position will inevitably intersect with the buffer baffle 2. The inclined plate surface converts the horizontal impact force of the packaging bags into a sliding component force along the plate surface, fundamentally eliminating the problems of bag leakage and packaging bags falling directly onto the conveyor belt 401. At the same time, the reasonable inclination angle not only provides good cushioning but also ensures that the packaging bags slide smoothly and do not stay on the baffle, so that the buffer baffle 2 covers the movement trajectory of the packaging bags. The inclination angle of 10°-30° disperses the weight of the packaging bags by the sliding component force, effectively reducing the impact of falling bags and protecting the integrity of the packaging bags.

[0042] Example 5 like Figures 5-8 As shown, the filling module also includes a transfer tank 103 and a liquid delivery pipeline 111. The transfer tank 103 is provided with a liquid inlet 104, a pressurization port 105, and a liquid outlet 106. The pressurization port 105 is connected to the pneumatic module, and the liquid outlet 106 is connected to the filling head 101 through the liquid delivery pipeline 111. In this embodiment, an observation window 107 for observing the liquid level inside the transfer tank 103 is also provided.

[0043] The intermediate storage tank 103 is used to temporarily store the liquid to be filled. Compressed air is introduced into the intermediate storage tank 103 through a pneumatic module, and the liquid is forced into the filling head 101 through the liquid delivery pipeline 111. The liquid enters the intermediate storage tank 103 from the inlet 104, and the pneumatic module pressurizes the tank through the pressurization port 105. Under pressure, the liquid flows out from the outlet 106, reaches the filling head 101 through the liquid delivery pipeline 111, and is finally injected into the packaging bag. This achieves pressurized filling, improves the filling speed, and is especially suitable for filling high-viscosity liquids. At the same time, the intermediate storage tank 103 plays a role in buffering and stabilizing pressure, ensuring the stability of the filling pressure, thereby improving the filling accuracy. The pressure of compressed air is used as the filling power. The intermediate storage tank 103 can stabilize the pressure and flow rate of the liquid, avoiding filling volume errors caused by fluctuations in upstream liquid supply.

[0044] In this embodiment, a replenishing valve 110 is also provided in front of the liquid inlet 104, and the replenishing valve 110 is controlled by the PLC controller.

[0045] In this embodiment, the liquid delivery pipeline 111 includes three parallel branch pipelines. One end of each branch pipeline is connected to the outlet 106 of the transfer storage tank 103, and the other end is connected to the filling head 101 through the metering control valve 109.

[0046] Each metering control valve 109 independently controls the filling volume and filling time of its corresponding filling head 101. The control module sends an independent control signal to each metering control valve 109 to adjust its opening time, thereby precisely controlling the liquid outflow of each filling head 101. This achieves multi-station independent metering filling, and the filling volume of each station can be adjusted individually. Simultaneously, the parallel pipeline design ensures consistent liquid supply pressure across all filling heads 101. By dividing the main pipeline into multiple independent branch pipelines, each branch pipeline equipped with a separate metering control valve 109, mutual interference between filling heads 101 is avoided. The opening time of the metering control valve 109 is linearly related to the filling volume, facilitating precise control. Each filling head 101 is equipped with a metering control valve 109, which is electrically connected to the PLC controller. The PLC controller sends a corresponding opening time signal to the metering control valve 109 according to the set filling volume. The metering control valve 109 opens according to a set time, allowing liquid to enter the filling head 101 through the valve and then be injected into the packaging bag. After filling is complete, the metering control valve 109 closes, cutting off the liquid supply and waiting for the next filling cycle.

[0047] Example 6 like Figures 1-4 As shown, the positioning module also includes a bag clamping drive cylinder 202, which is connected to the positioning clamp 201 to drive the positioning clamp 201 to open and close.

[0048] Each heat sealing head 301 is internally equipped with a heating tube and a temperature sensor, and a pressure adjusting spring 302 is also provided between each heat sealing head 301 and the heat sealing head mounting plate 304. A horizontal positioning plate is provided at the bottom of the heat sealing head mounting plate 304, and the heat sealing head 301 is mounted on the horizontal positioning plate.

[0049] Heat is supplied to the heat sealing head 301 via a heating tube, and the temperature of the heat sealing head 301 is monitored in real time by a temperature sensor. In this embodiment, a heat insulation plate 303 is also provided to prevent heat transfer to the heat sealing head mounting plate 304. Therefore, a pressure regulating spring 302 is set between the heat insulation plate 303 and the heat sealing head 301. A horizontal positioning plate is set at the bottom of the heat insulation plate 303 to adjust the heat sealing pressure of the heat sealing head 301 on the packaging bag. The control module adjusts the output power of the heating tube according to the feedback signal of the temperature sensor to keep the temperature of the heat sealing head 301 at the set value. During heat sealing, the pressure regulating spring 302 is... The compression generates elasticity, causing the heat sealing head 301 to press evenly against the sealing edge of the packaging bag, precisely controlling the heat sealing temperature and ensuring consistent heat sealing quality. The heat insulation plate 303 effectively reduces heat loss and lowers energy consumption. The pressure regulating spring 302 makes the heat sealing pressure more uniform, avoiding problems with weak sealing caused by uneven packaging bag thickness. The temperature sensor and heating tube form a closed-loop temperature control system, achieving precise temperature regulation. The heat insulation plate 303 has a low thermal conductivity, effectively blocking heat transfer. The spring's elasticity is adaptive, compensating for minor changes in packaging bag thickness.

[0050] Example 7 like Figure 1 , Figure 3 and Figure 5 As shown, the control module includes a PLC controller, a human-machine interface unit, and a sensor group. The sensor group includes a liquid level sensor (in this embodiment, a liquid level gauge 108) for the transfer storage tank 103, a heat-sealing temperature sensor, and multiple stroke sensors. The stroke sensors are used to detect the positioning status of the filling head 101 (lifting and lowering), the heat-sealing head 301 (opening and closing), the positioning clamp 201 (opening and closing), and the support base 203 (translating). The sensor group collects the equipment's operating status information in real time and sends it to the PLC controller. The PLC controller is installed inside the control cabinet 501.

[0051] The liquid level in the tank is detected by the level gauge 108. When the liquid level is below the lower limit, a replenishment signal is issued; when it is above the upper limit, a stop replenishment signal is issued. The real-time temperature of each heat-sealing head 301 is detected by the heat-sealing temperature sensor, and the temperature signal is converted into an electrical signal and sent to the PLC controller. Stroke sensors are installed on the filling head lifting mechanism, the heat-sealing head translation mechanism, the positioning clamp drive mechanism, and the support base translation mechanism to detect whether each moving part has reached its designated position.

[0052] In this embodiment, the human-machine interaction unit includes a control panel 502, an emergency stop button 505, a filling control console 503, and a belt speed control knob 504. The operator sends an emergency stop command through the emergency stop button 505.

[0053] The overall action sequence is set in the PLC controller according to the filling method of the multi-functional filling and sealing machine. After the operator turns on the manual execution switch 3, the PLC controller sends control signals to the solenoid valve group according to the overall action sequence to control the opening and closing of each solenoid valve, thereby controlling the action sequence and direction of each cylinder.

[0054] The filling volume is set by the filling control console 503, which sends the set value to the PLC controller. When executing step S3, the PLC controller sends a control signal to the quantitative control valve 109 to adjust the opening time of the quantitative control valve 109, thereby controlling the filling volume of each filling head 101. In this embodiment, the filling control console 503 is provided with three corresponding to the three filling heads 101.

[0055] The heating element temperature is set via control panel 502. Control panel 502 sends the set value of heating element temperature to PLC controller, which then sends a control signal to heating element to adjust the output power of heating element and control heat sealing temperature.

[0056] The speed control knob 504 sends a speed control signal to the PLC controller, which in turn sends a control signal to the conveyor belt motor to control the running speed and start / stop of the conveyor belt 401.

[0057] The PLC controller sends equipment operating status information, including real-time output, running time, status of each workstation, and fault information, to the control panel 502 for operators to monitor.

[0058] The PLC controller is electrically connected to the human-machine interface unit and the sensor group, respectively.

[0059] The PLC controller receives all input information and processes it according to the preset control program and logic algorithm. For example: For the temperature signal, the PLC controller uses a PID algorithm to calculate and output corresponding control signals to adjust the output power of the heating element, stabilizing the heat sealing temperature within the set value ±1℃. For the stroke signal, the PLC controller determines whether each moving part is in position. Only after all the preceding actions are completed will the next action be executed to prevent collisions.

[0060] The main power input is external three-phase 380V AC power, which enters the equipment distribution cabinet through the main air switch.

[0061] Three-phase 380V AC power is directly supplied to the conveyor belt motor. 220V AC power supplies the heating element, which is connected to the PLC controller via a solid-state relay. The PLC controller controls the on / off state and output power of the heating element. The 220V AC power is converted to 24V DC power by a switching power supply, supplying the PLC controller, human-machine interface unit, all sensors, and solenoid valve coils. The solenoid valve coils convert electrical energy into magnetic energy, driving the solenoid valve core to switch the air path.

[0062] An external air compressor generates compressed air, which is then delivered to the inlet of the equipment's pneumatic module via pipeline.

[0063] Compressed air first enters the pneumatic dual unit. In this embodiment, the pneumatic dual unit includes an air filter and a pressure reducing valve, which filter out moisture, oil mist, dust, and solid impurities from the compressed air to prevent impurities from clogging the solenoid valve and scratching the cylinder seals. Then, it stabilizes the unstable air source pressure to the required working pressure of the equipment, ensuring that the operating force of all cylinders is consistent.

[0064] The processed compressed air is divided into two paths. The first path enters a solenoid valve assembly, which consists of multiple two-position five-way solenoid valves, each corresponding to a cylinder. The PLC controller switches the air path by controlling the on / off state of the solenoid valve coils, thereby controlling the extension and retraction direction of the cylinders. The second path enters a pressure regulating valve assembly, which adjusts the compressed air to a suitable filling pressure before introducing it into the pressurization port 105 of the transfer storage tank 103, providing power for pressurized filling.

[0065] The external liquid supply system delivers liquid to the transfer storage tank 103 through the inlet 104 for temporary storage. The level gauge 108 monitors the liquid level in the tank in real time. When the liquid level is below the lower limit, the PLC controller controls the external liquid supply system to start replenishing the liquid; when the liquid level is above the upper limit, the PLC controller controls the external liquid supply system to stop replenishing the liquid.

[0066] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A multi-functional filling and sealing machine, comprising a filling and sealing machine body, and further comprising a filling module, a conveying module, a positioning module, a heat sealing module, and a control module, wherein the control module is electrically connected to the filling module, the conveying module, the positioning module, and the heat sealing module respectively, characterized in that: The filling module includes a filling head and a filling head lifting mechanism that is driven to the filling head above the filling head; the positioning module includes a positioning clamp, a positioning clamp driving mechanism, a support base, and a support base translation mechanism that is driven to the support base behind the support base. The positioning clamp is located on the side of the filling head, and the support base is located directly below the filling head. The heat sealing module includes heat sealing heads arranged symmetrically in pairs before and after the filling head, and the heat sealing heads arranged symmetrically in pairs before and after the filling head are respectively connected to heat sealing head translation mechanisms in the front and rear transmission; the filling module, heat sealing module and positioning module are provided in at least two sets; the conveying module includes a conveyor belt passing under all filling heads, and a buffer baffle is provided in front of the conveyor belt.

2. The multi-functional filling and sealing machine according to claim 1, characterized in that: It also includes a manual execution switch electrically connected to the control module; The filling head, filling head lifting mechanism, positioning clamp, positioning clamp driving mechanism, support base, support base translation mechanism, heat sealing head, and heat sealing head translation mechanism are all located inside the filling and sealing machine body; The manual operation switch is located outside the body of the filling and sealing machine.

3. The multi-functional filling and sealing machine according to claim 1, characterized in that: It also includes a pneumatic module, which comprises an air source, a pneumatic dual unit, a solenoid valve group, and a pressure regulating valve group. The output end of the air source is connected to the input end of the pneumatic dual unit, and the output end of the pneumatic dual unit is connected to the input ends of the solenoid valve group and the pressure regulating valve group, respectively. The multiple output ends of the solenoid valve group are respectively connected to the air circuits of the cylinders of the filling head lifting mechanism, the bag clamping driving cylinder 202 of the positioning clamp driving mechanism, the cylinders of the support base translation mechanism, the cylinders of the heat sealing head translation mechanism, and the pneumatic control switch of the positioning clamp. The control ends of the solenoid valve group and the pressure regulating valve group are electrically connected to the control module.

4. The multi-functional filling and sealing machine according to claim 1, characterized in that: The front-to-back distance between the bottom of the buffer baffle and the positioning position of the positioning module on the packaging bag is less than the height of the packaging bag, and the front-to-back distance between the top of the buffer baffle and the positioning position of the positioning module on the packaging bag is greater than the height of the packaging bag. The tilt angle of the buffer baffle is 10°-30°.

5. The multi-functional filling and sealing machine according to claim 1, characterized in that: The filling module also includes a transfer tank and a liquid delivery pipeline. The transfer tank is provided with a liquid inlet, a pressurization port and a liquid outlet. The pressurization port is connected to the output end of the pressure regulating valve group, and the liquid outlet is connected to the filling head through the liquid delivery pipeline.

6. The multi-functional filling and sealing machine according to claim 5, characterized in that: The liquid delivery pipeline includes at least two parallel branch pipelines, one end of each branch pipeline is connected to the outlet of the transfer storage tank, and the other end is connected to the filling head through a metering control valve.

7. The multi-functional filling and sealing machine according to claim 1, characterized in that: The positioning module also includes a bag clamping drive cylinder, which is connected to the positioning clamp to drive the positioning clamp to open and close.

8. The multi-functional filling and sealing machine according to claim 1, characterized in that: Each heat sealing head is internally equipped with a heating tube and a temperature sensor. The heat sealing head is mounted on the end of the power output rod of the heat sealing head translation mechanism via a heat sealing head mounting plate. A pressure adjusting spring is provided between the heat sealing head and the heat sealing head mounting plate. A horizontal positioning plate is provided at the bottom of the heat sealing head mounting plate, and the heat sealing head is mounted on the horizontal positioning plate.

9. The multi-functional filling and sealing machine according to claim 1, characterized in that: The control module includes a PLC controller, a human-machine interface unit, and a sensor group. The sensor group includes a liquid level sensor for the transfer storage tank, a heat sealing temperature sensor, and multiple stroke sensors. The stroke sensors are used to detect the positioning status of the filling head lifting, the heat sealing head opening and closing, the positioning clamp opening and closing, and the support seat translation.

10. A filling method for a multi-functional filling and sealing machine, characterized in that, Performed using a multi-functional filling and sealing machine as described in any one of claims 1-9, the process includes the following steps: S1: The opening of the packaging bag to be filled and sealed with an opening on one side is placed over the outside of the filling head, and the bottom of the packaging bag to be filled and sealed is placed on the support. S2: The positioning clamp holds the packaging bag to be filled and sealed; S3: The filling head injects liquid into the packaging bag to be filled and sealed for filling; S4: After filling is completed, the filling head lifting mechanism will pull the filling head upwards away from the packaging bag to be sealed; S5: The heat sealing head translation mechanism drives the paired heat sealing heads to move relative to each other to the packaging bag to be sealed and then begins heat sealing. After the heat sealing is completed, the heat sealing head translation mechanism drives the paired heat sealing heads to move in opposite directions away from the packaging bag that has been filled. S6: As the positioning clamp releases the sealed packaging bag, the support seat translation mechanism drives the support seat to move backward, causing the sealed packaging bag to tilt forward and fall onto the support seat. After falling onto the support seat, the packaging bag first contacts the buffer baffle and then falls onto the conveyor belt. S7: The support seat translation mechanism drives the support seat to move forward and return to directly below the filling head, and the filling head lifting mechanism drives the filling head to move downward and return to the original filling position. S8: Repeat steps S1-S7 above.

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