Paste filling machine

Abstract

This invention relates to the field of ointment filling technology, aiming to solve the problems of poor equipment sealing, low quantitative accuracy, and low automation in existing technologies. The ointment filling machine of this invention includes a stirring system and a filling system located below the stirring system. The stirring system includes at least a stirring vessel, a stirring paddle located inside the stirring vessel, and a stirring motor located above the stirring vessel. The stirring motor is coaxially connected to the stirring paddle through a sealing system. The filling system includes: a vessel support frame, with the stirring vessel of the stirring system located at the upper end of the vessel support frame; a material cylinder horizontally arranged within the vessel support frame; a drive system that drives the material cylinder to move up and down; a feeding pipe, with both ends of the feeding pipe connected to the bottom of the stirring vessel and the material cylinder, respectively; and multiple filling pumps evenly distributed below and connected to the material cylinder.

Description

Technical Field

[0001] This invention belongs to the field of ointment filling technology, and specifically relates to an ointment filling machine. Background Technology

[0002] In the pharmaceutical and cosmetic industries, high-precision quantitative filling of ointments and semi-solid materials such as ointments and suppositories is frequently required. Traditional filling equipment often suffers from several problems: First, for materials requiring mixing and heat preservation, the sealing of the mixing system is crucial; traditional sealing methods are prone to leakage, leading to material contamination or changes in composition. Second, the filling process often uses pneumatic or large pumps, which are not highly accurate for high-viscosity or easily solidified materials. Finally, automation is low, with separate suction and filling actions, resulting in low efficiency. Therefore, there is an urgent need for a filling device that integrates mixing, sealing, and quantitative filling, offering high precision and ease of cleaning. Summary of the Invention

[0003] The purpose of this invention is to provide a paste filling machine that solves the problems of poor equipment sealing, low quantitative accuracy, and low degree of automation in existing technologies.

[0004] To achieve the above objectives, the ointment filling machine of the present invention includes a stirring system and a filling system located below the stirring system; The stirring system includes at least a stirring vessel, a stirring blade located inside the stirring vessel, and a stirring motor located above the stirring vessel. The stirring motor is coaxially connected to the stirring blade through a sealing system. The infusion system includes: The vessel body support frame, with the stirring vessel of the stirring system located at the upper end of the vessel body support frame; A material cylinder horizontally arranged within the load-bearing frame of the vessel body; The drive system drives the entire barrel to move up and down. The feeding pipe is connected at both ends to the bottom of the mixing tank and the material cylinder, respectively. And injection pumps, a plurality of which are evenly distributed below the material cylinder and connected to the material cylinder.

[0005] The stirring system also includes: The mixing vessel cover is installed at the upper end of the mixing vessel; And a coiled tube is wound inside the mixing vessel, the inlet and outlet of which are connected by a flange seat and a through hole on the mixing vessel cover, and the inlet and outlet of the coil are in communication with the outside.

[0006] The coil inlet and outlet are integrally welded to the flange seat.

[0007] A sealing soft material is provided at the connection between the coil and the inner surface of the mixing vessel lid.

[0008] The sealing system includes: Two mechanical seal caps are disposed opposite to each other on the upper and lower ends of the mixing vessel cover; A bushing is coaxially disposed within the two mechanical seal covers. The output shaft of the stirring motor passes through the upper mechanical seal cover and is fixedly connected to one end of the bushing. The shaft of the stirring paddle passes through the lower mechanical seal cover and is fixedly connected to the other end of the bushing. The rotating ring connected to the bushing; A rotating ring seat fixed to the outer ring surface of the rotating ring; A stationary ring is fixedly installed inside a mechanical seal cap located on the lower end face of the mixing vessel cover. A sealing piston is installed between the end of the dynamic ring seat and the corresponding inner stepped surface of the mechanical seal cover; A sealing spring is located between the lower end face of the mixing vessel lid and the moving ring seat. The sealing spring applies an axial preload to the moving ring, so that the end face of the moving ring is tightly fitted with the end face of the stationary ring.

[0009] The drive system includes two sets of drive units symmetrically arranged at both ends of the barrel, each set of drive units including: A robotic arm that engages the end of the feed cylinder; The lead screw slide is fixedly connected to the robotic arm; A lead screw is arranged vertically, and the lead screw and the lead screw slide form a lead screw nut pair; And a drive motor, which drives the lead screw to rotate.

[0010] Each of the infusion pumps includes: A shell mold is connected to the material cylinder through a sealing flange seat. The interior of the shell mold is an upper chamber. A connecting part is provided at the lower end of the shell mold. The inner diameter of the connecting part is smaller than the inner diameter of the upper chamber. A guide limiting part is provided in the middle of the interior of the shell mold. A ball valve is movably disposed at the connection between the housing mold and the material cylinder; A first control spring is located inside the housing mold. The first control spring acts on the lower end of the ball valve and keeps it closed under normal conditions. A mold fixing component is provided, wherein the mold fixing component and the outer wall of the connecting part at the lower end of the housing mold are slidably fitted, and the center of the lower end face of the mold fixing component is provided with an injection hole that communicates with the outside. The lower chamber is located inside the mold fixing component, and the lower chamber is connected to the injection hole of the mold fixing component. The middle part of the lower chamber is slidably fitted with the inner wall of the connecting part provided at the lower end of the shell mold. The upper outer surface of the lower chamber is slidably fitted with the guide limiting part inside the shell mold. A limiting ring is provided on the outer surface of the lower chamber. When the lower chamber moves to its extreme vertical position, the limiting ring contacts and limits the lower end face of the guide limiting part and the upper end face of the connecting part, respectively. A feeding piston is installed inside the housing mold that moves up and down. The upper large-size end of the feeding piston slides in conjunction with the upper chamber, and the lower rod of the feeding piston slides in conjunction with the upper part of the lower chamber. The lower end of the first control spring contacts the upper end of the feeding piston. The rod of the feeding piston has a cylindrical structure with a small hole penetrating the cylindrical wall. The second control spring is sleeved on the lower chamber and located within the space formed by the lower chamber and the mold fixing component. One end of the second control spring contacts the lower end face of the housing mold, and the other end contacts the bottom surface of the mold fixing component. When the injection pump moves downward, the housing mold squeezes the mold fixing component, the second control spring is compressed, the lower chamber moves upward, the space becomes smaller, and under the action of pressure, the feeding piston moves upward. The first control spring is compressed, the ball valve closes, the rod of the feeding piston disengages from the lower chamber, and enters the upper chamber. The upper chamber has a small hole on the rod of the feeding piston. The liquid flows from the upper chamber into the lower chamber through the small hole, completing the feeding process. When the injection pump moves upward, the mold fixing component releases the pressure. Under the reset action of the first and second control springs, the feeding piston moves downward, the small hole of the feeding piston closes off the upper chamber, the ball valve opens, and the solution in the barrel flows into the upper chamber. At the same time, the lower chamber moves downward, squeezing out the solution within the movement stroke of the feeding piston and discharging it through the needle located at the lower end of the lower chamber, completing the injection process.

[0011] The feeding tube is a flexible hose.

[0012] The feeding tube is a polyurethane transparent steel wire telescopic hose.

[0013] The two ends of the feeding pipe are fitted with sealing soft material at the bottom of the mixing tank and the connection of the material cylinder.

[0014] The beneficial effects of this invention are as follows: The ointment filling machine of this invention uses a hose for water injection to achieve heat preservation, integrating stirring, heat preservation, conveying and quantitative filling functions into one compact structure, reducing the floor space and equipment complexity; the mechanical seal system not only solves the problem of easy leakage of traditional stirring shaft seals, ensuring the sealing and cleanliness of materials during the stirring process, but also functions as a coupling, simplifying the structure; the coordinated work of its mechanically triggered filling pump and precision screw drive system, through the overall lifting of the cylinder and pump body, utilizes simple mechanical collision triggering and spring control to achieve a fully automated cycle of material suction and filling, each The fixed displacement per stroke enables extremely precise quantitative control of high-viscosity, easily solidified ointments and suppositories, with accuracy far exceeding that of traditional pneumatic or ordinary pump filling methods. Fourth, the equipment is highly maintainable and easy to clean. The main material channels, such as the feeding pipe, use corrosion-resistant food-grade flexible hoses with quick connections. The filling pump has a simple structure without complex piping. The connection between the mixing tank and the material cylinder adopts an easy-to-disassemble sealing design, which greatly facilitates the replacement of different material types and the thorough cleaning of the equipment. The entire system operates stably and has a high degree of automation, effectively reducing the intensity of manual operation and production costs, while improving production efficiency and product quality consistency. Attached Figure Description

[0015] Figure 1 This is a partial sectional view of the main front view of the ointment filling machine of the present invention: Figure 2 This is a front view of the sealing system of the ointment filling machine of the present invention; Figure 3 This is a cross-sectional view of the sealing system of the ointment filling machine of the present invention; Figure 4 This is a front view of the ointment filling machine drive system of the present invention; Figure 5 This is a left view of the ointment filling machine drive system of the present invention; Figure 6 This is a schematic diagram of the filling pump structure of the ointment filling machine of the present invention; Figure 7 This is an enlarged view of the filling pump structure of the ointment filling machine of the present invention; The components include: 1. Agitator motor; 2. Sealing system; 201. Mechanical seal gland; 202. Sealing spring; 203. Rotating ring seat; 204. Sealing piston; 205. Stationary ring; 206. Rotating ring; 207. Shaft sleeve; 3. Coil; 4. Agitator paddle; 5. Mixing vessel; 6. Vessel body support frame; 7. Feed pipe; 8. Injection pump; 801. Sealing flange seat; 802. Ball valve; 803. Shell mold; 8031. Connecting part; 8032. Guide limiter. Position, 804, feeding piston, 8041, small hole, 805, second control spring, 806, mold fixing part, 8061, filling hole, 807, first control spring, 808, lower chamber, 8081, limit ring, 809, upper chamber, 9, material cylinder, 10, drive system, 1001, drive motor, 1002, lead screw, 1003, robot arm, 1004, lead screw slide, 11, mixing vessel cover, 12, flange seat. Detailed Implementation

[0016] The embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0017] See Figures 1-7 The ointment filling machine of the present invention includes a stirring system and a filling system located below the stirring system; The stirring system includes at least a stirring vessel 5, a stirring paddle 4 located inside the stirring vessel 5, and a stirring motor 1 located above the stirring vessel 5. The stirring motor 1 is coaxially connected to the stirring paddle 4 through a sealing system 2. The infusion system includes: The vessel body support frame 6, and the stirring vessel 5 of the stirring system is located at the upper end of the vessel body support frame 6; The material cylinder 9 is horizontally arranged within the vessel body support frame 6; The drive system 10 drives the material cylinder 9 to move up and down as a whole. Feeding pipe 7, the two ends of which are respectively connected to the bottom end of the mixing tank 5 and the material cylinder 9; And injection pump 8, a plurality of injection pump 8 are evenly distributed below the material cylinder 9 and are connected to the material cylinder 9.

[0018] The stirring system also includes: The mixing vessel cover 11 is provided at the upper end of the mixing vessel 5; And a coil 3 is coiled inside the mixing vessel 5. The inlet and outlet of the coil 3 are connected through a flange seat 12 and a through hole on the mixing vessel cover 11, and the inlet and outlet of the coil 3 are in communication with the outside.

[0019] The inlet and outlet of the coil 3 are integrally welded to the flange seat 12.

[0020] A sealing material is provided at the connection between the coil 3 and the inner surface of the mixing vessel cover 11. Specifically, a soft material packing seal is used.

[0021] The installation method of coil 3 is as follows: the mixing vessel cover 11 is flat, and the shape and diameter of coil 3 are milled on the cover surface. The flange seat 12 is welded to the coil 3 as a whole. In this way, the coil 3, which is symmetrically connected at both ends, will not vibrate too much when subjected to the impact of the solution, thus reducing its service life. During the installation process, the mixing vessel cover 11 is placed on the flange seat 12, and the coil 3 is connected to the lower surface of the mixing vessel cover 11 by thread connection. The connection is sealed with soft material packing.

[0022] The sealing system 2 includes: Two mechanical seal caps 201 are disposed opposite to each other on the upper and lower ends of the mixing vessel cover 11; A bushing 207 is coaxially disposed within the two mechanical seal covers 201. The output shaft of the stirring motor 1 passes through the upper mechanical seal cover 201 and is fixedly connected to one end of the bushing 207. The paddle shaft of the stirring paddle 4 passes through the lower mechanical seal cover 201 and is fixedly connected to the other end of the bushing 207. The rotating ring 206 is connected to the bushing 207; A rotating ring seat 203 is fixed to the outer ring surface of the rotating ring 206; The stationary ring 205 is fixedly installed inside the mechanical seal cover 201 located on the lower end face of the mixing vessel cover 11; A sealing piston 204 is disposed between the end of the dynamic ring seat 203 and the inner stepped surface of the corresponding mechanical seal cover 201; A sealing spring 202 is located between the lower end face of the stirring vessel cover 11 and the moving ring seat 203. The sealing spring 202 applies an axial preload to the moving ring 206, so that the end face of the moving ring 206 is tightly fitted with the end face of the stationary ring 205.

[0023] Working principle of sealing system 2: During the stirring process, the rotating shaft of the stirring motor 1 rotates, causing the moving ring 206 to rotate as well. Under the action of the sealing spring 202 and other compensation mechanisms, the moving ring 206 is tightly pressed against the stationary ring 205. Since the stationary ring 205 is fixed on the stirring vessel cover 11 and is in a stationary state, a tiny sealing gap is formed between the two. The fluid pressure and the sealing piston 204 will increase the contact pressure between the moving ring 206 and the stationary ring 205, further improving the sealing performance and preventing fluid leakage through this gap.

[0024] The stirring motor 1 is connected to the mixing vessel cover 11 via a motor base, and is mechanically sealed to the stirring paddle 4 using a sealing system 2. The sealing system 2 not only solves the sealing problem of the mixing vessel 5, but also functions as a coupling.

[0025] The drive system 10 includes two sets of drive units symmetrically arranged at both ends of the material cylinder 9, each set of drive units including: The robotic arm 1003 is attached to the end of the feed cylinder 9; The lead screw slide 1004 is fixedly connected to the robotic arm 1003; A lead screw 1002 is arranged vertically, and the lead screw 1002 and the lead screw slide 1004 form a lead screw 1002 nut pair; And a drive motor 1001, which drives the lead screw 1002 to rotate.

[0026] The drive system 10 is installed as follows: the robot arm 1003 is connected to the lead screw slide 1004 via a threaded connection; the robot arm 1003 is connected to the material cylinder 9 via an interference fit; the drive motor 1001 is connected to the lead screw 1002 via a coupling; and the drive motor 1001 is fixed to the vessel body support frame 6 via a flange connection. The rotation of the drive motor 1001 shaft drives the lead screw 1002 to rotate, which in turn drives the lead screw slide 1004 to perform reciprocating linear motion. The robot arm 1003 moves at a speed of 480 mm / min. -1 The speed drives the material cylinder 9 to rise and fall, thereby realizing the function of the injection pump 8 in circulating and sucking up the medicine.

[0027] Each of the infusion pumps 8 includes: The shell mold 803 is connected to the material cylinder 9 through a sealing flange seat 801. The shell mold 803 has an upper chamber 809 inside. A connecting part 8031 ​​is provided at the lower end of the shell mold 803. The inner diameter of the connecting part 8031 ​​is smaller than the inner diameter of the upper chamber 809. A guide limiting part 8032 is provided in the middle of the shell mold 803. Ball valve 802 is movably disposed at the connection between the housing mold 803 and the material cylinder 9; A first control spring 807 is located inside the housing mold 803. The first control spring 807 acts on the lower end of the ball valve 802 and keeps it closed under normal conditions. The mold fixing component 806 is slidably fitted to the outer wall of the connecting part 8031 ​​at the lower end of the shell mold 803, and the mold fixing component 806 has an injection hole 8061 communicating with the outside at the center of the lower end face. The lower chamber 808 is located within the mold fixing member 806, and the lower chamber 808 communicates with the injection hole 8061 of the mold fixing member 806. The middle part of the lower chamber 808 is slidably engaged with the inner wall of the connecting part 8031 ​​provided at the lower end of the shell mold 803. The upper outer surface of the lower chamber 808 is slidably engaged with the guide limiting part 8032 inside the shell mold 803. A limiting ring 8081 is provided on the outer surface of the lower chamber 808. When the lower chamber 808 moves to its extreme positions, the limiting ring 8081 contacts and limits the movement with the lower end face of the guide limiting part 8032 and the upper end face of the connecting part 8031, respectively. A feeding piston 804 is installed inside the housing mold 803 and is movable up and down. The upper large-size end of the feeding piston 804 is slidably engaged with the upper chamber 809, and the lower rod of the feeding piston 804 is slidably engaged with the upper part of the lower chamber 808. The lower end of the first control spring 807 is in contact with the upper end of the feeding piston 804. The rod of the feeding piston 804 is a cylindrical structure, and a small hole 8041 penetrating the cylindrical wall is provided on the cylindrical structure. The second control spring 805 is sleeved on the lower chamber 808 and located within the space formed by the lower chamber 808 and the mold fixing member 806. One end of the second control spring 805 contacts the lower end face of the housing mold 803, and the other end contacts the bottom surface of the mold fixing member 806. When the injection pump 8 moves downward, the housing mold 803 squeezes the mold fixing member 806, the second control spring 805 is compressed, the lower chamber 808 moves upward, the space becomes smaller, and under the pressure, the feeding piston 804 moves upward. The first control spring 807 is compressed, the ball valve 802 is closed, the rod of the feeding piston 804 disengages from the lower chamber 808 and enters the upper chamber 806. 9. The small hole 8041 of the rod of the feeding piston 804 is located in the upper chamber 809. The liquid flows from the upper chamber 809 into the lower chamber 808 through the small hole 8041, completing the suction. When the injection pump 8 moves upward, the mold fixing part 806 is released from the squeeze. Under the reset action of the first control spring 807 and the second control spring 805, the feeding piston 804 moves downward, the small hole 8041 of the feeding piston 804 is separated from the upper chamber 809 and closed, the ball valve 802 is opened, the solution in the material cylinder 9 flows into the upper chamber 809, and at the same time the lower chamber 808 moves downward, squeezing out the solution within the moving stroke of the feeding piston 804 and discharging it through the needle set at the lower end of the lower chamber 808, completing the injection.

[0028] The feed tube 7 is a flexible hose.

[0029] The feeding pipe 7 is a polyurethane transparent steel wire telescopic hose. It is made of food-grade polyurethane transparent steel wire telescopic hose, which has corrosion resistance, high pressure resistance, and bending resistance. It is connected to the mixing vessel 5 and the filling cylinder 9 via flange seat 12 threaded connection. The connection points are still sealed with soft material packing for easy disassembly, cleaning, and replacement.

[0030] The two ends of the feeding pipe 7 are fitted with sealing soft material at the connection points between the feeding pipe 7 and the bottom of the mixing vessel 5 and the material cylinder 9. Specifically, soft material packing is used for sealing.

Claims

1. An ointment filling machine, characterized in that, Includes a mixing system and a grouting system located below the mixing system; The stirring system includes at least a stirring vessel (5), a stirring paddle (4) located inside the stirring vessel (5), and a stirring motor (1) located above the stirring vessel (5). The stirring motor (1) is coaxially connected to the stirring paddle (4) through a sealing system (2). The infusion system includes: The vessel body support frame (6) is located at the upper end of the stirring vessel (5) of the stirring system; A material cylinder (9) is horizontally arranged inside the vessel body support frame (6); The drive system (10) drives the material cylinder (9) to move up and down as a whole. Feeding pipe (7), the two ends of which are connected to the bottom end of the mixing tank (5) and the material cylinder (9), respectively; And injection pumps (8), a plurality of injection pumps (8) are evenly distributed below the material cylinder (9) and connected to the material cylinder (9).

2. The ointment filling machine according to claim 1, characterized in that, The stirring system also includes: A stirring vessel cover (11) is provided at the upper end of the stirring vessel (5). And a coil (3) is coiled inside the mixing vessel (5), the inlet and outlet of the coil (3) are connected through a flange seat (12) and a through hole on the mixing vessel cover (11), and the inlet and outlet of the coil (3) are connected to the outside.

3. The ointment filling machine according to claim 2, characterized in that, The inlet and outlet of the coil (3) are integrally welded with the flange (12).

4. The ointment filling machine according to claim 2, characterized in that, A sealing soft material is provided at the connection between the coil (3) and the inner surface of the mixing vessel cover (11).

5. The ointment filling machine according to claim 1, characterized in that, The sealing system (2) includes: Two mechanical seal caps (201) are disposed opposite to each other on the upper and lower ends of the mixing vessel cover (11). A bushing (207) is coaxially disposed in the two mechanical seal covers (201). The output shaft of the stirring motor (1) passes through the upper mechanical seal cover (201) and is fixedly connected to one end of the bushing (207). The paddle shaft of the stirring paddle (4) passes through the lower mechanical seal cover (201) and is fixedly connected to the other end of the bushing (207). The rotating ring (206) is connected to the bushing (207); A rotating ring seat (203) is fixed on the outer ring surface of the rotating ring (206); A stationary ring (205) is fixedly installed inside a mechanical seal cap (201) located on the lower end face of the mixing vessel cover (11); A sealing piston (204) is provided between the end of the dynamic ring seat (203) and the inner stepped surface of the corresponding mechanical seal cover (201). And a sealing spring (202) located between the lower end face of the stirring vessel cover (11) and the moving ring seat (203), the sealing spring (202) applies an axial preload to the moving ring (206) so that the end face of the moving ring (206) fits tightly against the end face of the stationary ring (205).

6. The ointment filling machine according to claim 1, characterized in that, The drive system (10) includes two sets of drive units symmetrically arranged at both ends of the barrel (9), each set of drive units including: The robotic arm (1003) at the end of the feed cylinder (9); A lead screw slide (1004) is fixedly connected to the robotic arm (1003). A lead screw (1002) is arranged vertically, and the lead screw (1002) and the lead screw slide (1004) form a lead screw (1002) nut pair; And a drive motor (1001), which drives the lead screw (1002) to rotate.

7. The ointment filling machine according to claim 1, characterized in that, Each of the infusion pumps (8) includes: A shell mold (803) is connected to the material cylinder (9) through a sealing flange seat (801). The shell mold (803) has an upper chamber (809) inside. A connecting part (8031) is provided at the lower end of the shell mold (803). The inner diameter of the connecting part (8031) is smaller than the inner diameter of the upper chamber (809). A guide limiting part (8032) is provided in the middle of the shell mold (803). A ball valve (802) is movably disposed at the connection between the housing mold (803) and the material cylinder (9); A first control spring (807) is located inside the housing mold (803). The first control spring (807) acts on the lower end of the ball valve (802) and keeps it closed under normal conditions. The mold fixing component (806) and the connecting part (8031) at the lower end of the shell mold (803) are slidably fitted on the outer wall. The mold fixing component (806) has an injection hole (8061) at the center of the lower end face that communicates with the outside. The lower chamber (808) is located inside the mold fixing member (806), and the lower chamber (808) is connected to the injection hole (8061) of the mold fixing member (806). The middle part of the lower chamber (808) and the inner wall of the connecting part (8031) provided at the lower end of the shell mold (803) are slidably engaged. The upper outer surface of the lower chamber (808) and the guide limiting part (8032) inside the shell mold (803) are slidably engaged. A limiting ring (8081) is provided on the outer surface of the lower chamber (808). When the lower chamber (808) moves to the limit position, the limiting ring (8081) contacts and limits the lower end face of the guide limiting part (8032) and the upper end face of the connecting part (8031) respectively. A feeding piston (804) is installed inside the housing mold (803) and moved up and down. The upper large-size end of the feeding piston (804) is slidably engaged with the upper chamber (809), and the lower rod of the feeding piston (804) is slidably engaged with the upper part of the lower chamber (808). The lower end of the first control spring (807) is in contact with the upper end of the feeding piston (804). The rod of the feeding piston (804) is a cylindrical structure, and a small hole (8041) penetrating the cylindrical wall is provided on the cylindrical structure. And a second control spring (805), which is sleeved on the lower chamber (808) and located in the space formed by the lower chamber (808) and the mold fixing member (806). One end of the second control spring (805) contacts the lower end face of the shell mold (803), and the other end contacts the bottom surface of the mold fixing member (806). When the injection pump (8) moves down, the shell mold (803) squeezes the mold fixing member (806), the second control spring (805) is compressed, the lower chamber (808) moves up, the space becomes smaller, and under the action of pressure, the feeding piston (804) is pushed upward. The first control spring (807) is compressed, the ball valve (802) is closed, the rod of the feeding piston (804) disengages from the lower chamber (808) and enters the upper chamber (809). The small hole (8041) of the rod of the feeding piston (804) is located in the upper chamber (809). The liquid flows from the upper chamber (809) into the lower chamber (808) through the small hole (8041) to complete the feeding. When the injection pump (8) moves upward, the mold fixing part (806) is released from the squeeze. Under the reset action of the first control spring (807) and the second control spring (805), the feeding piston (804) moves downward. The small hole (8041) of the feeding piston (804) is separated from the upper chamber (809) and closed. The ball valve (802) opens and the solution in the barrel (9) flows into the upper chamber (809). At the same time, the lower chamber (808) moves downward and squeezes out the solution within the moving stroke of the feeding piston (804). The solution is discharged through the needle set at the lower end of the lower chamber (808) to complete the injection.

8. The ointment filling machine according to claim 1, characterized in that, The feed tube (7) is a flexible hose.

9. The ointment filling machine according to claim 8, characterized in that, The feeding pipe (7) is a polyurethane transparent steel wire telescopic hose.

10. The ointment filling machine according to claim 1, characterized in that, The two ends of the feeding pipe (7) are provided with sealing soft material at the connection between the bottom of the mixing tank (5) and the material cylinder (9).

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