Negative pressure quantitative reshaping packaging machine

Abstract

The utility model provides a kind of negative pressure quantitative shaping packaging machine, rack main body is driven negative pressure vacuum box opening and closing by power hinge assembly, power hinge assembly includes power cylinder, directional rod, opening and closing swing arm and support seat, two directional rods are respectively inserted in two opening and closing swing arm middle part, power cylinder drives one end of opening and closing swing arm, make the other end of opening and closing swing arm drive negative pressure vacuum box opening and closing, negative pressure vacuum box inner wall is all equipped with packaging shaping plate, and there is in place detection switch in negative pressure vacuum box, the utility model effectively solves the problem that the irregular shape of packaging causes the influence of transfer by packaging shaping plate, by in place detection switch combination packaging shaping plate and in place detection switch, ensure that valve port packaging bag is close to valve port position when negative pressure adsorption, avoid the leakage of powder to vacuum box due to bag body drop, controller gives power cylinder signal control, realize safety signal interlock, prevent equipment misoperation, make equipment run stably improve efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of ultrafine powder packaging equipment, specifically to a negative pressure quantitative shaping and packaging machine. Background Technology

[0002] While existing packaging machines can automatically fill materials into bags, they are prone to introducing air into the material during the filling process, resulting in loose material and incomplete filling. Furthermore, they cannot effectively control the filling speed, leading to lower packaging reliability and accuracy. In addition, existing packaging machines generate significant amounts of material dust during the packaging process, causing a deterioration of the production environment.

[0003] The solution, such as the utility model patent with application number CN201920698192.6 and publication number CN209870783U (hereinafter referred to as "Prior Art 1"), discloses a valve bag vacuum quantitative packaging machine, including a vacuum box, a programmable logic controller, a weighing mechanism, a vacuum mechanism, a feeding mechanism, and a dust collection mechanism; wherein, the weighing mechanism, vacuum mechanism, feeding mechanism, and dust collection mechanism are all installed in the vacuum box, and the weighing mechanism, vacuum mechanism, feeding mechanism, and dust collection mechanism are all electrically connected to the programmable logic controller.

[0004] The specification of prior art 1 discloses that by setting up a vacuuming mechanism connected to the inside of a vacuum chamber, the pressure difference between the vacuum chamber and the feeding mechanism is used to suck the powder into the valve-mouth packaging bag inside the vacuum chamber, thereby achieving powder packaging under a sealed vacuum state, achieving zero gas inside the valve-mouth packaging bag, and completing the packaging process in a closed environment without dust generation. By setting up a weighing mechanism to collect data on the weight of the valve-mouth packaging bag in real time and sending the signal to the PLC, the reliability and accuracy of packaging can be effectively improved. However, in actual use, during production, after the valve-mouth packaging bag is put into the valve and the negative pressure vacuum chamber is closed, it cannot be guaranteed whether the packaging bag is in the valve. If the packaging bag falls off and directly sucks the powder into the vacuum chamber, the vacuum chamber will be full of powder, resulting in malfunctions. In addition, the irregular shape of the packaging will affect the transfer. Utility Model Content

[0005] The purpose of this invention is to provide a negative pressure quantitative shaping and packaging machine, which aims to solve the problems of existing negative pressure vacuum boxes not being able to ensure that the packaging bag is at the valve opening after the box is closed, and if the packaging bag falls off and directly sucks the powder into the vacuum box, the vacuum box will be full of powder, causing malfunctions, and the irregular shape of the packaging will affect the transfer.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A negative pressure quantitative shaping and packaging machine is provided, comprising a frame body, a negative pressure vacuum chamber connected to the front end of the frame body, a control cabinet connected to one side of the frame body, a controller installed in the control cabinet, a feed pipe, a negative pressure pipe, and a dust removal pipe connected to the negative pressure vacuum chamber, a feed valve assembly connected to the feed pipe, a negative pressure valve assembly connected to the negative pressure pipe, and a dust removal valve assembly connected to the dust removal pipe, and the controller electrically connected to the feed valve assembly, the negative pressure valve assembly, and the dust removal valve assembly respectively. The negative pressure vacuum chamber is opened and closed by a power hinge assembly, which includes a power cylinder, a guide rod, an opening and closing swing arm, and a support base. The two ends of the support base are used to limit the guide rod. The two guide rods are respectively inserted into the middle of the two opening and closing swing arms. The power cylinder drives one end of the opening and closing swing arm, so that the other end of the opening and closing swing arm drives the negative pressure vacuum chamber to open and close. The inner wall of the negative pressure vacuum chamber is equipped with packaging shaping plates. A position detection switch is connected to the feed pipe inside the negative pressure vacuum chamber.

[0008] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0009] This utility model provides a negative pressure quantitative shaping and packaging machine. The inner wall of the negative pressure vacuum chamber is equipped with packaging shaping plates, effectively solving the problem of irregular packaging shapes affecting transport. A positioning detection switch is connected to the corresponding feed pipe inside the negative pressure vacuum chamber. Combined with the packaging shaping plates and positioning detection switches, this ensures that the packaging bag is tightly attached to the valve opening during negative pressure adsorption, preventing powder leakage into the vacuum chamber due to bag detachment. The controller sends signals to the power cylinder for control, and the controller logic control achieves safety signal interlocking to prevent equipment malfunction, ensuring stable operation and improved efficiency. A power hinge assembly (including a power cylinder, directional rod, opening and closing swing arm, etc.) drives the opening and closing of the vacuum chamber. The limiting design of the directional rod and support seat enhances motion stability and reduces packaging bag displacement caused by mechanical vibration.

[0010] Preferably, the middle part of the support base is fixedly connected to the negative pressure vacuum box, and both ends of the support base are connected to directional rods through bearing seats. The two directional rods are respectively fixedly connected to the opening and closing swing arms. The two sets of cylinder rods of the power cylinder are respectively connected to one end of the two opening and closing swing arms. The other end of one opening and closing swing arm is connected to one side of the negative pressure vacuum box, and the other end of the other opening and closing swing arm is connected to the other side of the negative pressure vacuum box.

[0011] By adopting the above structure, the two sets of cylinder rods drive the opening and closing swing arms on both sides respectively. With the bearing seats and directional rod limiting structure at both ends of the support base, the negative pressure vacuum box is subjected to uniform force on both sides, avoiding box tilting or jamming caused by force on one side, and improving the synchronization and repeatability of the opening and closing action.

[0012] Preferably, the opening and closing swing arm is disposed in the middle of the directional rod, and a synchronous swing arm is connected to the top and bottom of the directional rod respectively. An upper limit seat is connected between the tops of the two directional rods, and the upper limit seat is connected to the two directional rods respectively through bearing seats. A lower limit seat is connected between the bottoms of the two directional rods, and the lower limit seat is connected to the two directional rods respectively through bearing seats. The middle part of the support base is connected to the two opening and closing swing arms through a synchronizer.

[0013] By adopting the above structure, the opening and closing swing arm is located in the middle of the directional rod, and is connected with the upper and lower synchronous swing arms and synchronizer to ensure that the movement of the two swing arms is completely synchronized, avoiding tilting or jamming of the negative pressure vacuum box due to uneven force; the upper limit seat and the lower limit seat are connected to the top and bottom of the directional rod through bearing seats to form a rigid frame structure, which limits the lateral displacement of the directional rod and further improves the accuracy of the opening and closing trajectory; the synchronous swing arm and the limit seat can offset the vibration caused by uneven weight of the packaging bag or the impact of powder, ensuring that the vacuum box can still open and close smoothly under dynamic load.

[0014] Preferably, the front end of the frame body is connected to the negative pressure vacuum chamber via a weighing mechanism. The weighing mechanism includes a weighing component and a weighing connecting rod. The weighing component is located at the top of the frame body, and the weighing connecting rod is located at the bottom of the negative pressure vacuum chamber.

[0015] Preferably, the weighing assembly includes a weighing scale, and the weighing scale's beam is connected to the negative pressure vacuum chamber via a connecting seat.

[0016] By adopting the above structure, the weighing component is located at the top of the main frame. Together with the weighing linkage at the bottom of the negative pressure vacuum chamber, it can monitor the weight change of the powder in the packaging bag in real time, ensuring the accuracy of quantitative packaging. The weighing data can be fed back to the controller in real time, dynamically adjusting the feeding valve group or the negative pressure adsorption sequence to achieve closed-loop control and reduce manual intervention.

[0017] Preferably, one end of the weighing link is connected to the frame body via a shock absorber, and the other end of the weighing link is movably connected through a support bracket, which is fixedly connected to the negative pressure vacuum chamber.

[0018] By adopting the above scheme, the shock absorber is used to eliminate mechanical interference between the frame and the weighing mechanism, ensuring accurate measurement. The shock absorber effectively absorbs the mechanical vibration transmitted by the negative pressure vacuum box, avoids high-frequency interference affecting the weighing sensor reading, and ensures the stability and accuracy of powder weight detection. The movable through structure of the support bracket and the weighing linkage allows the negative pressure vacuum box to move slightly during weighing, avoids the rigid constraint of mechanical stress on the weighing system, and maintains the directness of the force transmission path.

[0019] Preferably, the frame body is located at the bottom of the negative pressure vacuum chamber and is connected to a stabilizer bracket.

[0020] By employing the above structure, the stabilizer bracket is used to prevent swaying between components during transportation.

[0021] Preferably, the front end of the negative pressure vacuum chamber is connected to an anti-collision protector.

[0022] By employing the above structure, the anti-collision protector is used to protect operators.

[0023] Preferably, the dust removal pipe is located at the bottom rear end of the negative pressure vacuum chamber, and the dust removal pipe is connected to the bottom of the negative pressure vacuum chamber.

[0024] By adopting the above structure, the dust removal pipe is located at the bottom rear end of the negative pressure vacuum box, which makes the dust removal effect smoother and better.

[0025] Preferably, the control cabinet is connected to an air inlet pipe for supplying compressed air for instruments, the air inlet pipe is connected to a pressure regulating valve, and the pressure regulating valve is electrically connected to the controller.

[0026] By adopting the above structure, the control cabinet is connected to the air inlet pipe of the instrument-specific compressed air, which makes the internal pressure of the control cabinet greater than the external pressure of the control cabinet, thereby preventing dust from entering the control cabinet, achieving a dustproof effect, and protecting electrical components such as the CPU inside the cabinet. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a perspective view of the present utility model;

[0029] Figure 2 This is the front view of the present invention;

[0030] Figure 3 This is the left view of the present invention;

[0031] Figure 4 This is the right view of the present invention;

[0032] Figure 5 This is a top view of the present invention;

[0033] Figure 6 This is a bottom view of the present invention;

[0034] Figure 7 This is a rear view of the present invention.

[0035] In the diagram: 1. Main frame; 2. Negative pressure vacuum chamber; 3. Control cabinet; 4. Controller; 5. Feed pipe; 6. Negative pressure pipe; 7. Dust removal pipe; 8. Feed valve assembly; 9. Negative pressure valve assembly; 10. Dust removal valve assembly; 11. Power hinge assembly; 12. Power cylinder; 13. Directional rod; 14. Opening and closing swing arm; 15. Support seat; 16. Packaging shaping plate; 17. Position detection switch; 18. Bearing seat; 19. Synchronous swing arm; 20. Upper limit seat; 21. Lower limit seat; 22. Synchronizer; 23. Weighing mechanism; 24. Weighing component; 25. Weighing connecting rod; 26. Weighing meter; 27. Connecting seat; 28. Shock absorber; 29. ​​Support bracket; 30. Stabilizer bracket; 31. Anti-collision protector; 32. Air inlet pipe; 33. Pressure regulating valve. Detailed Implementation

[0036] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0037] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature.

[0039] The following is combined Figures 1 to 7 This invention describes a negative pressure quantitative shaping and packaging machine.

[0040] like Figures 1 to 7As shown, this utility model provides a negative pressure quantitative shaping and packaging machine, including a frame body 1. A negative pressure vacuum chamber 2 is connected to the front end of the frame body 1. The negative pressure vacuum chamber 2 includes two opposing doors and an L-shaped weighing body. A control cabinet 3 is connected to one side of the frame body 1, and a controller 4 is installed inside the control cabinet 3. The negative pressure vacuum chamber 2 is connected to a feed pipe 5, a negative pressure pipe 6, and a dust removal pipe 7. The feed pipe 5 is connected to a feed valve group 8, the negative pressure pipe 6 is connected to a negative pressure valve group 9, and the dust removal pipe 7 is connected to a dust removal valve group 10. The controller 4 is electrically connected to the feed valve group 8, the negative pressure valve group 9, and the dust removal valve group 10 respectively. The controller 4 controls the feed valve group 8, the negative pressure valve group 9, and the dust removal valve group 10 through an internally programmed program. The frame body 1 is controlled by a power hinge assembly 11, which drives the opening and closing of the negative pressure vacuum box 2. The power hinge assembly includes a power cylinder 12, a guide rod 13, an opening and closing swing arm 14, and a support base 15. The controller 4 controls the power cylinder 12. The two ends of the support base 15 are used to limit the guide rod 13. The two guide rods 13 are respectively inserted into the middle of the two opening and closing swing arms 14. The power cylinder 12 drives one end of the opening and closing swing arm 14, so that the other end of the opening and closing swing arm 14 drives the two doors of the negative pressure vacuum box 2 to open and close. The inner walls of the two doors of the negative pressure vacuum box 2 are equipped with packaging shaping plates 16. The corresponding feed pipe 5 in the negative pressure vacuum box 2 is connected to a position detection switch 17. The controller 4 receives signals from the position detection switch 17.

[0041] During implementation, after the packaging bag is properly placed, the controller 4 detects the signal from the positioning switch 17. The negative pressure vacuum chamber 2 is then sealed by the power hinge assembly 11. The negative pressure valve group 9 opens, creating a negative pressure inside the vacuum chamber 2 through the negative pressure pipe 6. Then, the feed valve group 8 opens, feeding the packaging bag through the feed pipe 5. The shaping plate inside the vacuum chamber 2 shapes the packaging bag to ensure its standard shape for easy stacking and transportation. The weighing meter 26 of the weighing mechanism 23 stops feeding after detecting that the user-set value has been reached to achieve accurate weight. After packaging is completed, the negative pressure valve group 9 closes and releases pressure. When the internal pressure of the vacuum chamber 2 is at atmospheric pressure, the dust removal valve operates, removing dust through the dust removal pipe 7. After dust removal is completed, the power cylinder 12 drives the opening and closing swing arm 14 to open the vacuum chamber 2, completing the packaging. The internal shaping plate effectively solves the problem of irregular packaging shape affecting transportation, and the dust removal pipe 7 effectively solves the problem of dust in the on-site environment.

[0042] This utility model provides a negative pressure quantitative shaping and packaging machine. The inner wall of the negative pressure vacuum chamber 2 is equipped with packaging shaping plates 16, effectively solving the problem of irregular packaging shapes affecting transport. A corresponding infeed pipe 5 is connected to a positioning detection switch 17 inside the negative pressure vacuum chamber 2. Combined with the packaging shaping plates 16 and the positioning detection switch 17, this ensures that the packaging bag at the valve opening is tightly attached to the valve opening during negative pressure adsorption, preventing powder leakage into the vacuum chamber due to bag detachment. The controller 4 sends a signal to the power cylinder 12 for control. The controller 4's logic control achieves safety signal interlocking, preventing equipment malfunctions and ensuring stable operation and improved efficiency. A power hinge assembly 11 (including a power cylinder 12, a directional rod 13, and an opening / closing swing arm 14) drives the vacuum chamber to open and close. The limiting design of the directional rod 13 and the support base 15 enhances motion stability and reduces packaging bag offset caused by mechanical vibration.

[0043] Preferably, the middle part of the support base 15 is fixedly connected to the negative pressure vacuum box 2. Both ends of the support base 15 are connected to the directional rods 13 through the bearing seats 18. The two directional rods 13 are respectively fixedly connected to the opening and closing swing arms 14. The two sets of cylinder rods of the power cylinder 12 are respectively connected to one end of the two opening and closing swing arms 14. The other end of one opening and closing swing arm 14 is connected to one side of the negative pressure vacuum box 2, and the other end of the other opening and closing swing arm 14 is connected to the other side of the negative pressure vacuum box 2. The two sets of cylinder rods drive the two opening and closing swing arms 14 on both sides respectively. With the bearing seats 18 and the directional rods 13 limiting structure at both ends of the support base 15, the force on both sides of the negative pressure vacuum box 2 is even, avoiding the box body tilting or jamming caused by the force on one side, and improving the synchronization and repeatability of the opening and closing action.

[0044] Preferably, the opening and closing swing arm 14 is disposed in the middle of the directional rod 13. A synchronous swing arm 19 is connected to the top and bottom of the directional rod 13, respectively. An upper limit seat 20 is connected between the tops of the two directional rods 13, and the upper limit seat 20 is connected to the two directional rods 13 via bearing seats 18. A lower limit seat 21 is connected between the bottoms of the two directional rods 13, and the lower limit seat 21 is connected to the two directional rods 13 via bearing seats 18. The middle of the support seat 15 is connected to the two opening and closing swing arms 14 via a synchronizer 22. The opening and closing swing arm 14 is located at... The middle part of the directional rod 13 is connected with the upper and lower synchronous swing arms 19 and the synchronizer 22 to ensure that the movement of the two swing arms is completely synchronized, and to avoid tilting or jamming of the negative pressure vacuum box 2 due to uneven force. The upper limit seat 20 and the lower limit seat 21 are connected to the top and bottom of the directional rod 13 through the bearing seat 18 to form a rigid frame structure, which limits the lateral displacement of the directional rod 13 and further improves the accuracy of the opening and closing trajectory. The synchronous swing arms 19 and the limit seats can offset the vibration caused by uneven weight of the packaging bag or the impact of powder, ensuring that the vacuum box can still open and close smoothly under dynamic load.

[0045] Preferably, the front end of the frame body 1 is connected to the negative pressure vacuum box 2 via a weighing mechanism 23. The weighing mechanism 23 includes a weighing component 24 and a weighing connecting rod 25. The weighing component 24 is located at the top of the frame body 1, and the weighing connecting rod 25 is located at the bottom of the negative pressure vacuum box 2. The weighing component 24 includes a weighing meter 26. The weighing bar of the weighing meter 26 is connected to the negative pressure vacuum box 2 via a connecting seat 27. The weighing component 24 is located at the top of the frame body 1. Together with the weighing connecting rod 25 at the bottom of the negative pressure vacuum box 2, it can monitor the weight change of the powder in the packaging bag in real time to ensure the accuracy of quantitative packaging. The weighing data can be fed back to the controller 4 in real time to dynamically adjust the feeding valve group 8 or the negative pressure adsorption sequence to achieve closed-loop control and reduce manual intervention.

[0046] Preferably, one end of the weighing link 25 is connected to the frame body 1 via a shock absorber 28, and the other end of the weighing link 25 is movably connected through a support bracket 29. The support bracket 29 is fixedly connected to the negative pressure vacuum chamber 2. The shock absorber 28 is used to absorb mechanical interference between the frame and the weighing mechanism 23, ensuring accurate measurement. The shock absorber 28 effectively absorbs the mechanical vibration transmitted by the negative pressure vacuum chamber 2, avoiding high-frequency interference from affecting the weighing sensor reading, and ensuring the stability and accuracy of powder weight detection. The movable connection between the support bracket 29 and the weighing link 25 allows for slight displacement of the negative pressure vacuum chamber 2 during weighing, avoiding the rigid constraint of mechanical stress on the weighing system, while maintaining the directness of the force transmission path.

[0047] Preferably, the frame body 1 is connected to a stabilizer bracket 30 at the bottom of the negative pressure vacuum box 2. The stabilizer bracket 30 is used to prevent the components from shaking during transportation.

[0048] Preferably, the front end of the negative pressure vacuum chamber 2 is connected to an anti-collision protector 31, which is used to protect the operator.

[0049] Preferably, the dust removal pipe 7 is located at the bottom rear end of the negative pressure vacuum box 2, and the dust removal pipe 7 is connected to the bottom of the negative pressure vacuum box 2. The location of the dust removal pipe 7 at the bottom rear end of the negative pressure vacuum box 2 can make the dust removal effect smoother and better.

[0050] Preferably, the control cabinet 3 is connected to an air inlet pipe 32 for accessing instrument-specific compressed air. The air inlet pipe 32 is connected to a pressure regulating valve 33, which is electrically connected to the controller 4. The air inlet pipe 32 for accessing instrument-specific compressed air in the control cabinet 3 enables the internal pressure of the control cabinet 3 to be greater than the external pressure of the control cabinet 3, thereby preventing dust from entering the control cabinet 3, achieving a dustproof effect, and protecting electrical components such as the CPU inside the cabinet.

[0051] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made using the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A negative pressure quantitative shaping and packaging machine, comprising a frame body (1), a negative pressure vacuum box (2) connected to the front end of the frame body (1), a control cabinet (3) connected to one side of the frame body (1), a controller (4) installed in the control cabinet (3), the negative pressure vacuum box (2) being connected to a feed pipe (5), a negative pressure pipe (6) and a dust removal pipe (7), the feed pipe (5) being connected to a feed valve group (8), the negative pressure pipe (6) being connected to a negative pressure valve group (9), the dust removal pipe (7) being connected to a dust removal valve group (10), and the controller (4) being electrically connected to the feed valve group (8), the negative pressure valve group (9) and the dust removal valve group (10) respectively, characterized in that, The frame body (1) drives the negative pressure vacuum box (2) to open and close through the power hinge assembly (11). The power hinge assembly (11) includes a power cylinder (12), a guide rod (13), an opening and closing swing arm (14), and a support base (15). The two ends of the support base (15) are used to limit the guide rod (13). The two guide rods (13) are respectively inserted into the middle of the two opening and closing swing arms (14). The power cylinder (12) drives one end of the opening and closing swing arm (14), so that the other end of the opening and closing swing arm (14) drives the negative pressure vacuum box (2) to open and close. The inner wall of the negative pressure vacuum box (2) is equipped with packaging shaping plates (16). The negative pressure vacuum box (2) is connected to the inlet pipe (5) with a position detection switch (17).

2. The negative pressure quantitative shaping and packaging machine according to claim 1, characterized in that, The middle part of the support base (15) is fixedly connected to the negative pressure vacuum box (2). Both ends of the support base (15) are connected to the directional rod (13) through the bearing seat (18). The two directional rods (13) are fixedly connected to the opening and closing swing arm (14). The two sets of cylinder rods of the power cylinder (12) are respectively connected to one end of the two opening and closing swing arms (14). The other end of one opening and closing swing arm (14) is connected to one side of the negative pressure vacuum box (2), and the other end of the other opening and closing swing arm (14) is connected to the other side of the negative pressure vacuum box (2).

3. A negative pressure quantitative shaping and packaging machine according to any one of claims 1 or 2, characterized in that, The opening and closing swing arm (14) is located in the middle of the directional rod (13). The top and bottom ends of the directional rod (13) are respectively connected to a synchronous swing arm (19). An upper limit seat (20) is connected between the top ends of the two directional rods (13). The upper limit seat (20) is connected to the two directional rods (13) through a bearing seat (18). A lower limit seat (21) is connected between the bottom ends of the two directional rods (13). The lower limit seat (21) is connected to the two directional rods (13) through a bearing seat (18). The middle part of the support seat (15) is connected to the two opening and closing swing arms (14) through a synchronizer (22).

4. The negative pressure quantitative shaping and packaging machine according to claim 1, characterized in that, The front end of the frame body (1) is connected to the negative pressure vacuum chamber (2) through a weighing mechanism (23). The weighing mechanism (23) includes a weighing component (24) and a weighing link (25). The weighing component (24) is located at the top of the frame body (1), and the weighing link (25) is located at the bottom of the negative pressure vacuum chamber (2).

5. A negative pressure quantitative shaping and packaging machine according to claim 4, characterized in that, The weighing assembly (24) includes a weighing scale (26), the scale bar of which is connected to the negative pressure vacuum box (2) via a connecting seat (27).

6. A negative pressure quantitative shaping and packaging machine according to claim 4, characterized in that, One end of the weighing link (25) is connected to the frame body (1) through a shock absorber (28), and the other end of the weighing link (25) is movably connected through a support bracket (29), which is fixedly connected to the negative pressure vacuum box (2).

7. A negative pressure quantitative shaping and packaging machine according to claim 1, characterized in that, The frame body (1) is located at the bottom of the negative pressure vacuum box (2) and is connected to a stabilizer bracket (30).

8. A negative pressure quantitative shaping and packaging machine according to claim 1, characterized in that, The front end of the negative pressure vacuum box (2) is connected to an anti-collision protector (31).

9. A negative pressure quantitative shaping and packaging machine according to claim 1, characterized in that, The dust removal pipe (7) is located at the bottom rear end of the negative pressure vacuum box (2), and the dust removal pipe (7) is connected to the bottom of the negative pressure vacuum box (2).

10. A negative pressure quantitative shaping and packaging machine according to claim 1, characterized in that, The control cabinet (3) is connected to an air inlet pipe (32) for accessing instrument-specific compressed air. The air inlet pipe (32) is connected to a pressure regulating valve (33), which is electrically connected to the controller (4).

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