Quantitative Extrusion Machine and Extrusion Method for Liquid Paste

Abstract

The present invention provides a quantitative extruder for liquid paste and an extrusion method, which relates to the field of paste extrusion. It includes a paste cylinder and an outlet pipe installed at the bottom of the paste cylinder for communicating with the paste cylinder. An extrusion assembly is arranged on the opposite side of the outlet pipe. The extrusion assembly includes a cylinder and a plug placed in the paste cylinder and in full contact with the inner peripheral wall of the paste cylinder. The plug is connected to the cylinder; a swing bracket rotatably connected to the paste cylinder is arranged outside the paste cylinder. The swing bracket is in an inverted Y shape. The two bifurcated segments of the inverted Y shape extend outward at the bottom of the paste cylinder. The two bifurcated segments extending outward respectively carry a first counterweight and a cleaning member; during the rotation of the swing bracket relative to the paste cylinder, the cleaning member approaches and contacts the paste sticking at the outlet of the outlet pipe, and during continuous pulling, the sticking paste is wiped off from the outlet, avoiding the phenomenon that the actually filled amount of the corresponding container is greater than the standard filling amount caused by the paste sticking at the outlet pipe entering the corresponding container during subsequent filling.

Description

Technical Field

[0001] The present invention relates to the field of paste extrusion, and particularly to a quantitative extruder for liquid paste and an extrusion method. Background Art

[0002] Using an extruder to quantitatively extrude liquid paste is a commonly used paste filling method at present.

[0003] Analyzing from the specific extrusion object, for materials with high fluidity such as water, in a single quantitative compression, it can perfectly enter the container from the extruder. However, for materials with a large adhesion coefficient such as liquid paste, in a single quantitative compression, more or less a small part of the paste adheres to the pipe outlet. Thus, it can be seen that after a single quantitative compression, the container cannot effectively obtain the obtained material, and there is essentially an error in the quantification. This error is infinitely amplified in industrial production, which is obviously inappropriate for production.

[0004] Therefore, in combination with the actual needs, a quantitative extruder for liquid paste is proposed that can clean the liquid paste adhering to the pipe outlet during a single quantitative compression. Summary of the Invention

[0005] The purpose of the present invention is to provide a quantitative extruder for liquid paste and an extrusion method to solve the technical problem that for materials with a large adhesion coefficient such as liquid paste, in a single quantitative compression, more or less a small part of the paste adheres to the pipe outlet. Thus, it can be seen that after a single quantitative compression, the container cannot effectively obtain the obtained material, and there is essentially an error in the quantification. This error is infinitely amplified in industrial production, which is obviously inappropriate for production.

[0006] To solve the above technical problems, the present invention adopts the following technical solutions to achieve:

[0007] A quantitative extruder for liquid paste, comprising a paste cylinder and an outlet pipe installed at the bottom of the paste cylinder for communicating with the paste cylinder. An extrusion assembly is arranged on the opposite side of the outlet pipe. The extrusion assembly includes a cylinder and a plug placed inside the paste cylinder and in full contact with the inner peripheral wall of the paste cylinder. The plug is connected to the cylinder;

[0008] A swing bracket rotatably connected to the paste cylinder is arranged outside the paste cylinder. The swing bracket is in an inverted Y shape. The two bifurcated segments of the inverted Y shape extend outward at the bottom of the paste cylinder. The two outwardly extending bifurcated segments are respectively hung with a first counterweight and a cleaning member;

[0009] A magnetic attraction component and a paste inlet pipe extending outward from the plugging plug are provided. The outward extending part of the paste inlet pipe is connected to the paste pump group. The outward extending part of the magnetic attraction component turns the extending direction and directly points to the first counterweight, which is used to magnetically attract and pull the first counterweight when the plugging plug moves from downward to upward in the paste cylinder, so that the swing bracket rotates relative to the paste outlet pipe and the paste sticking to the outlet of the paste outlet pipe is scraped by the cleaning part.

[0010] Preferably, the first counterweight and the cleaning part are movably mounted at the swing bracket.

[0011] Preferably, the swing bracket includes a transfer seat rotatably connected to the paste cylinder. Taking the transfer seat as the center, a support plate and two sliding frames surrounding the outer peripheral wall of the transfer seat are provided. Both sliding frames are provided with sliding grooves for movably mounting the first counterweight and the cleaning part.

[0012] Preferably, the first counterweight includes a counterweight body magnetically attracted to the magnetic attraction component. A first bolt is provided at the end side of the counterweight body, which penetrates through the sliding groove and extends outward. The first bolt slides in the sliding groove to change the relative position of the counterweight body at the sliding groove.

[0013] A first fastening buckle is provided on the first bolt. The first fastening buckle is threadedly sleeved on the first bolt and is used to fix the counterweight body at the sliding groove when it is close to the sliding frame.

[0014] Preferably, the cleaning part includes a scraping part and a second bolt installed at the end side of the scraping part. The second bolt penetrates through the sliding groove and slides in the sliding groove to change the relative position of the scraping part at the sliding groove.

[0015] A second fastening buckle is provided on the second bolt. The second fastening buckle is threadedly sleeved on the second bolt and is used to fix the scraping part at the sliding groove when it is close to the sliding frame.

[0016] Preferably, the scraping part includes a sleeve cup with an opening and a contact head movably embedded into the sleeve cup through the opening. The contact head protrudes outward at the opening and is used to scrape the paste sticking to the outlet of the paste outlet pipe when the swing bracket rotates to the paste outlet pipe.

[0017] Preferably, a stop lever for the swing bracket to impact the paste cylinder after swinging back is installed on the support plate.

[0018] Preferably, a swing rod groove is provided at the relative position of the opening of the sleeve cup. A swing rod connected to the contact head is provided in the swing rod groove, and a second counterweight is hung at the tail of the swing rod, which is used to make the contact head rotate into the sleeve cup when the stop lever impacts the paste cylinder.

[0019] Preferably, the magnetic attraction component includes a plug rod connected to the plugging plug and extending outward relative to the paste cylinder. A snake rod is installed at the outward extending end of the plug rod, and a magnetic head directly pointing to the first counterweight is fixed at the end of the snake rod.

[0020] Extrusion method of a liquid paste quantitative extruder, including the following extrusion steps:

[0021] 1) Start the cylinder to move the pressure plug upward in the paste cylinder. During the upward movement, the paste pump group quantitatively fills the paste into the space pressed by the pressure plug, so that the paste is extruded from the paste outlet pipe when the pressure plug presses downward;

[0022] 2) Before the pressure plug moves upward, the magnetic attraction component connected to the pressure plug magnetically attracts the first counterweight. When the pressure plug moves upward in the paste cylinder, based on the magnetic force, the first counterweight is pulled, destroying the relative balance between the first counterweight and the cleaning part, so that when the cleaning part rotates relative to the paste cylinder on the swing bracket, it approaches and contacts the paste sticking at the outlet of the paste outlet pipe, and during continuous pulling, the sticking paste is wiped off from the outlet.

[0023] The beneficial effects of the present invention are:

[0024] In the present invention, when the pressure plug in the paste cylinder changes from downward movement to upward pulling, the magnetic attraction component installed at the pressure plug and extending outward magnetically attracts and pulls the first counterweight to destroy the relative balance between the first counterweight and the cleaning part, so that when the cleaning part rotates relative to the paste cylinder on the swing bracket, it approaches and contacts the paste sticking at the outlet of the paste outlet pipe, and during continuous pulling, the sticking paste is wiped off from the outlet, avoiding the phenomenon that the actually filled amount of the corresponding container is greater than the standard filled amount caused by the paste sticking at the paste outlet pipe entering the corresponding container during subsequent filling. Description of the drawings

[0025] Figure 1 It is a schematic structural diagram of a liquid paste quantitative extruder;

[0026] Figure 2 It is a schematic structural diagram of the present invention when cleaning the outlet of the paste outlet pipe;

[0027] Figure 3 It is Figure 1 A schematic structural diagram from another perspective after removing the extrusion component;

[0028] Figure 4 It is Figure 2 A schematic structural diagram from another perspective after removing the extrusion component;

[0029] Figure 5 It is a schematic structural diagram of the swing mechanism in the present invention;

[0030] Figure 6 It is a schematic structural diagram of the cleaning part in the present invention;

[0031] Figure 7 It is a three-dimensional sectional structural diagram of the cleaning part in the present invention;

[0032] Reference numerals: 1, paste inlet pipe; 2, extrusion assembly; 3, magnetic attraction assembly; 31, insertion rod; 32, snake rod; 33, magnetic head; 4, first counterweight; 41, counterweight body; 42, first fastening buckle; 5, paste outlet pipe; 6, cleaning member; 61, second fastening buckle; 62, sleeve cup; 63, contact head; 64, swing rod; 65, second counterweight; 7, swing bracket; 71, sliding carriage; 72, support plate; 73, adapter seat; 8, paste cylinder; 9, swing stop rod. Detailed implementation manners

[0033] In order to make the technical means, creative features, achieved purposes and functions of the present invention easy to understand, the following combines specific embodiments and drawings to further elaborate the present invention. However, the following embodiments are only the preferred embodiments of the present invention, not all. Based on the embodiments in the implementation manners, other embodiments obtained by those skilled in the art without creative efforts all belong to the protection scope of the present invention.

[0034] The following describes the specific embodiments of the present invention with reference to the drawings.

[0035] Embodiment 1

[0036] In this embodiment, a quantitative extruder for liquid paste is proposed, which includes a paste cylinder 8 and a paste outlet pipe 5 installed at the bottom of the paste cylinder 8 and used for communicating with the paste cylinder 8. An extrusion assembly 2 is arranged on the opposite side of the paste outlet pipe 5. The extrusion assembly 2 includes a cylinder and a pressure plug placed in the paste cylinder 8 and in complete contact with the inner peripheral wall of the paste cylinder 8. The pressure plug is connected to the cylinder;

[0037] A swing bracket 7 rotatably connected to the paste cylinder 8 is arranged outside the paste cylinder 8. The swing bracket 7 is in an inverted Y shape. The two bifurcated segments of the inverted Y shape extend outward at the bottom of the paste cylinder 8. The two extended bifurcated segments respectively hang a first counterweight 4 and a cleaning member 6;

[0038] A magnetic attraction assembly 3 and a paste inlet pipe 1 are arranged by the pressure plug extending outward from the paste cylinder 8. Among them, the outward extending part of the paste inlet pipe 1 is connected to a paste pump group. The outward extending part of the magnetic attraction assembly 3 turns the extending direction and directly points to the first counterweight 4, and is used to magnetically attract and pull the first counterweight 4 when the pressure plug moves from down to up in the paste cylinder 8, so that the swing bracket 7 rotates relative to the paste outlet pipe 5 and the cleaning member 6 scrapes the paste sticking to the outlet of the paste outlet pipe 5.

[0039] It should be noted that in this embodiment, the first counterweight 4 and the cleaning member 6 are respectively fixed at the two bifurcated segments (not shown in the figure). Among them, the relative positions of the first counterweight 4 and the cleaning member 6 to the two bifurcated segments have been adaptively adjusted (the cleaning member 6 can scrape the paste sticking to the mouth of the paste outlet pipe 5). Therefore, when there is no external force interference, the first counterweight 4 and the cleaning member 6 tend to be or approach balance at the swing bracket 7.

[0040] Please refer toFigure 1-2 , in this embodiment, a quantitative extruder for liquid paste is proposed, which can clean the paste sticking to the nozzle of the paste outlet pipe 5. The quantitative extruder for liquid paste combines components such as the paste inlet pipe 1, the extrusion assembly 2, the magnetic attraction assembly 3, the first counterweight 4, the paste outlet pipe 5, the cleaning part 6, the swing bracket 7, and the paste cylinder 8. When the plug is pressed into the paste cylinder 8 and changes from downward movement to upward pulling, the magnetic attraction assembly 3 installed at the plug and extending outward magnetically attracts and pulls the first counterweight 4, thereby destroying the relative balance between the first counterweight 4 and the cleaning part 6. During the rotation of the swing bracket 7 relative to the paste cylinder 8, the cleaning part 6 approaches and contacts the paste sticking to the outlet of the paste outlet pipe 5, and during continuous pulling, the sticking paste is wiped off from the outlet, avoiding the phenomenon that the actually filled amount of the corresponding container is greater than the standard filled amount due to the paste sticking at the paste outlet pipe 5 entering the corresponding container during subsequent filling.

[0041] Embodiment 2

[0042] In this embodiment, a quantitative extruder for liquid paste is proposed, which includes a paste cylinder 8 and a paste outlet pipe 5 installed at the bottom of the paste cylinder 8 and communicating with the paste cylinder 8. An extrusion assembly 2 is arranged on the opposite side of the paste outlet pipe 5. The extrusion assembly 2 includes a cylinder and a plug placed inside the paste cylinder 8 and in full contact with the inner peripheral wall of the paste cylinder 8. The plug is connected to the cylinder;

[0043] A swing bracket 7 rotatably connected to the paste cylinder 8 is arranged outside the paste cylinder 8. The swing bracket 7 is in an inverted Y shape. The two bifurcated segments of the inverted Y shape extend outward from the bottom of the paste cylinder 8. The two extended bifurcated segments respectively mount the first counterweight 4 and the cleaning part 6;

[0044] There are a magnetic attraction assembly 3 extending outward from the plug and a paste inlet pipe 1 provided relative to the paste cylinder 8. Among them, the extended part of the paste inlet pipe 1 is connected to a paste pump group. The extended part of the magnetic attraction assembly 3 turns the extension direction and directly points to the first counterweight 4, which is used to magnetically attract and pull the first counterweight 4 when the plug is pressed into the paste cylinder 8 and changes from downward movement to upward pulling, so that the swing bracket 7 rotates relative to the paste outlet pipe 5 and the cleaning part 6 scrapes the paste sticking to the outlet of the paste outlet pipe 5.

[0045] Different from Embodiment 1, in this embodiment, the first counterweight 4 and the cleaning part 6 are movably mounted on the swing bracket 7.

[0046] As follows, how the first counterweight 4 and the cleaning part 6 are movably mounted on the swing bracket 7 will be described:

[0047] First, regarding the swing bracket 7, it includes a transfer seat 73 rotatably connected to the paste cylinder 8. Taking the transfer seat 73 as the center, there are support plates 72 and two sliding frames 71 arranged around the outer peripheral wall of the transfer seat 73. Both of the two sliding frames 71 are provided with sliding grooves for movably mounting the first counterweight 4 and the cleaning part 6.

[0048] In combination with the description of the swing bracket 7, the first counterweight 4 includes a counterweight body 41 that is magnetically attracted to the magnetic attraction component 3. A first bolt that penetrates the sliding groove and extends outward is provided at the end side of the counterweight body 41. The first bolt slides to the sliding groove for changing the relative position of the counterweight body 41 to the sliding groove;

[0049] The cleaning member 6 includes a scraping member and a second bolt installed at the end side of the scraping member. The second bolt penetrates the sliding groove and slides to the sliding groove for changing the relative position of the scraping member to the sliding groove;

[0050] Regarding the scraping member, it has an open sleeve cup 62 and a contact 63 that moves into the sleeve cup 62 from the opening. The contact 63 protrudes outward at the opening for scraping the paste adhered to the outlet of the paste outlet pipe 5 when the swing bracket 7 rotates to the paste outlet pipe 5;

[0051] It should be noted that after the positions of the first counterweight 4 and the cleaning member 6 are determined, corresponding fixing is required. For this purpose, a first fastening buckle 42 is provided at the first bolt. The first fastening buckle 42 is threadedly sleeved on the first bolt for fixing the counterweight body 41 to the sliding groove when it is close to the carriage 71; similarly, a second fastening buckle 61 is provided at the second bolt. The second fastening buckle 61 is threadedly sleeved on the second bolt for fixing the scraping member to the sliding groove when it is close to the carriage 71.

[0052] Please refer to Figure 1-5 , in this embodiment, a quantitative extruder for liquid paste is proposed that can adjust the relative positions of the first counterweight 4 and the cleaning member 6 to the swing bracket 7 based on the length of the paste outlet pipe 5. The quantitative extruder for liquid paste combines components such as the feed pipe 1, the extrusion assembly 2, the magnetic attraction assembly 3, the counterweight body 41, the first fastening buckle 42, the paste outlet pipe 5, the scraping member, the second fastening buckle 61, the carriage 71, the support plate 72, the adapter seat 73, and the paste cylinder 8, aiming to adjust the relative positions of the counterweight body 41 and the scraping member to the corresponding carriage 71 according to the length of the paste outlet pipe 5, so that the counterweight body 41 and the scraping member can always maintain a relatively balanced state in relative adjustment after the length of the paste outlet pipe 5 changes.

[0053] Embodiment 3

[0054] This embodiment is an improved embodiment of Embodiment 2. Therefore, regarding how to adjust the relative positions of the counterweight body 41 and the scraping member to the carriage 71 in this embodiment, please refer to the relevant description in Embodiment 2;

[0055] Different from Embodiment 2, in this embodiment, a stop lever 9 that impacts the paste cylinder 8 after the swing bracket 7 swings back is installed at the support plate 72. Accordingly, a swing lever groove is provided at the relative position of the opening of the sleeve cup 62, and a swing lever 64 connected to the contact 63 is provided in the swing lever groove. A second counterweight 65 is suspended at the tail of the swing lever 64, so that when the stop lever 9 impacts the paste cylinder 8, the contact 63 rotates into the sleeve cup 62.

[0056] When the contact 63 reciprocally participates in the cleaning process, some paste will accumulate. That is, after the contact 63 scrapes the paste, most of the paste can be separated during the swing-back movement and the impact of the stop lever 9 on the paste cylinder 8. However, there is still a small amount of stubborn paste coated on the surface of the contact 63. For this reason, please refer to Figure 6 and Figure 7 , in this embodiment, by adding the swing lever 64 and the second counterweight 65, combined with the stop lever 9 impacting the paste cylinder 8, the second counterweight 65 is energized, and swings from the contact 63 to the sleeve cup 62 with an opening, cutting the paste coated on the surface of the contact 63 to the opening, so as to ensure that the contact 63 always remains relatively clean after each cleaning, and avoid contaminating the outlet of the paste tube 5 during the reciprocating scraping.

[0057] The magnetic attraction assembly 3 used in Embodiments 1, 2, and 3 specifically includes an insertion rod 31 connected to the plug and extending outward relative to the paste cylinder 8. A snake rod 32 is installed at the outward extending end of the insertion rod 31, and a magnetic head 33 pointing directly at the first counterweight 4 is fixed at the end of the snake rod 32.

[0058] Please refer to Figure 3 and Figure 4 , the outward extending part of the insertion rod 31 is bent downward for fixing the snake rod 32. It should be noted that the snake rod 32 can be pinched, that is, combined with the specific position of the first counterweight 4 to the swing bracket 7, by adjusting the specific shape of the snake rod 32, when the plug moves in the paste cylinder 8, the magnetic head 33 installed at the end of the snake rod 32 can always be aligned with the counterweight body 41.

[0059] Description of how to quantitatively introduce paste into the paste cylinder 8 in Embodiments 1, 2, and 3:

[0060] First, the plug is set to extend into the paste tube 1 outward relative to the paste cylinder 8. The outward extending part of the paste tube 1 is connected to the paste pump group. It should be noted that the pipe orifice of the paste tube 1 penetrates through the plug and is communicated with the space pressed by the plug. Accordingly, when the plug completes one extrusion action, during the upward pulling action, the paste is quantitatively filled by the paste pump group, so that when the plug presses again, the paste is squeezed into the container from the paste tube 5.

[0061] In Embodiments 1, 2, and 3, the cylinder and the paste cylinder 8 are both fixed by corresponding equipment, that is, after this extruder is installed, the cylinder and the paste cylinder 8 are both fixed and immovable.

[0062] In the present invention, unless otherwise clearly stipulated and defined, the first feature being "on" or "under" the second feature may include direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes that the first feature is directly under and obliquely under the second feature, or merely means that the horizontal height of the first feature is less than that of the second feature.

[0063] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and the above embodiments and the descriptions in the specification are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. Liquid paste quantitative extrusion machine, Characterized in that: It includes a paste cylinder (8) and an outlet pipe (5) installed at the bottom of the paste cylinder (8) for communicating with the paste cylinder (8). An extrusion assembly (2) is arranged on the opposite side of the outlet pipe (5). The extrusion assembly (2) includes a cylinder and a plug placed inside the paste cylinder (8) and in full contact with the inner peripheral wall of the paste cylinder (8). The plug is connected to the cylinder; An oscillating bracket (7) rotatably connected to the paste cylinder (8) is arranged outside the paste cylinder (8). The oscillating bracket (7) is in an inverted Y shape. The two bifurcated segments of the inverted Y shape extend outward at the bottom of the paste cylinder (8). The two bifurcated segments extending outward respectively carry a first counterweight (4) and a cleaning member (6); A magnetic attraction assembly (3) and a feed pipe (1) are provided with the plug extending outward from the paste cylinder (8). Among them, the part of the feed pipe (1) extending outward is connected to a paste pump group. The part of the magnetic attraction assembly (3) extending outward turns the extension direction and directly points to the first counterweight (4), and is used to magnetically attract and pull the first counterweight (4) when the plug moves from the lower part to the upper part in the paste cylinder (8), so that the oscillating bracket (7) rotates relative to the outlet pipe (5) and the cleaning member (6) scrapes the paste sticking to the outlet of the outlet pipe (5); The oscillating bracket (7) includes a transfer seat (73) rotatably connected to the paste cylinder (8). Taking the transfer seat (73) as the center, a support plate (72) and two sliding frames (71) surrounding the outer peripheral wall of the transfer seat (73) are arranged. Both of the two sliding frames (71) are provided with sliding grooves for movably mounting the first counterweight (4) and the cleaning member (6); The first counterweight (4) includes a counterweight body (41) having magnetic attraction with the magnetic attraction assembly (3). A first bolt is arranged at the end side of the counterweight body (41) and penetrates through the sliding groove and extends outward. The first bolt slides to the sliding groove, and is used to change the relative position of the counterweight body (41) to the sliding groove; A first fastening buckle (42) is arranged at the first bolt. The first fastening buckle (42) is threadedly sleeved on the first bolt, and is used to fix the counterweight body (41) to the sliding groove when it is close to the sliding frame (71); The cleaning member (6) includes a scraping member and a second bolt installed at the end side of the scraping member. The second bolt penetrates through the sliding groove and slides to the sliding groove, and is used to change the relative position of the scraping member to the sliding groove; A second fastening buckle (61) is arranged at the second bolt. The second fastening buckle (61) is threadedly sleeved on the second bolt, and is used to fix the scraping member to the sliding groove when it is close to the sliding frame (71); The scraping member includes a sleeve cup (62) with an opening and a contact head (63) movably embedded into the sleeve cup (62) from the opening. The contact head (63) protrudes outward from the opening, and is used to scrape the paste sticking to the outlet of the outlet pipe (5) by the contact head (63) when the oscillating bracket (7) rotates to the outlet pipe (5); A stop lever (9) for the oscillating bracket (7) to hit the paste cylinder (8) after swinging back is installed at the support plate (72); A swing rod groove is arranged at the relative position of the opening of the nested cup (62). A swing rod (64) connected to the contact (63) is arranged in the swing rod groove. A second counterweight (65) is hung at the tail of the swing rod (64) to enable the contact (63) to rotate into the nested cup (62) when the swing rod (9) impacts the paste cylinder (8). The magnetic attraction assembly (3) includes a plug rod (31) connected to the plug and extending outward relative to the paste cylinder (8). A snake rod (32) is installed at the outer extending end of the plug rod (31), and a magnetic head (33) directly pointing to the first counterweight (4) is fixed at the end of the snake rod (32).

2. The quantitative extrusion machine for liquid paste according to claim 1, characterized in that: The first counterweight (4) and the cleaning member (6) are movably mounted to the swing bracket (7).

3. The extrusion method of the quantitative extrusion machine for liquid paste according to claim 1, characterized in that, it includes the following extrusion steps: 1) Start the cylinder to move the plug upward in the paste cylinder. During the upward movement, the paste is quantitatively filled into the space pressed by the plug by the paste pump group, so that the paste is extruded from the paste outlet pipe when the plug is pressed downward; 2) Before the plug moves upward, the first counterweight is magnetically attracted by the magnetic attraction assembly connected to the plug. When the plug moves upward in the paste cylinder, based on the magnetic force, the first counterweight is pulled to break the relative balance between the first counterweight and the cleaning member, so that when the cleaning member rotates relative to the paste cylinder on the swing bracket, it approaches and contacts the paste sticking to the outlet of the paste outlet pipe, and the sticking paste is wiped off from the outlet during continuous pulling.

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