Plunger glue supply pump

Abstract

The utility model discloses a plunger glue supply pump which comprises a vertically arranged air cylinder, a glue taking cylinder sleeve of which the upper end is connected with a cylinder body part of the air cylinder, and a pressure plate which is arranged under the glue taking cylinder sleeve, and the lower end of an upper link shaft which is vertically arranged at the lower end of a piston rod of the air cylinder penetrates into the glue taking cylinder sleeve; the side wall of the glue taking cylinder sleeve is provided with a glue discharging opening which is arranged at the same height as the glue outlet, the other end of the glue discharging opening of which one end is communicated with an inner cavity of the glue taking cylinder sleeve is provided with a horizontally arranged glue discharging cross rod in a sealing manner, and the glue discharging cross rod is internally provided with a glue discharging channel extending in the horizontal direction; and a glue sealing part which extends towards the glue discharging channel and can be in sealing fit with the glue discharging channel is arranged at one end, facing the glue discharging channel, of the main body part of the glue discharging screw. According to the utility model, air and residual glue in the glue runner can be timely and quickly discharged through the glue discharging port before glue is discharged again every time, the waste of the glue is reduced, and the sealing property of the whole glue runner can be kept in the normal glue discharging process.

Description

Technical Field

[0001] The utility model relates to the technical field of glue supply, in particular to a plunger glue supply pump. Background Art

[0002] In glue application operations, plunger pumps are often used to adjust the glue flow rate. During reciprocating motion, glue supply is achieved by compressing the gas in the working cavity. In the prior art, before each restart of glue supply, the plunger pump cannot timely discharge the air and residual glue in the glue flow channel, resulting in waste of glue. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide a plunger glue supply pump, which can both facilitate timely and rapid discharge of air and residual glue in the glue flow channel through a discharge port before each restart of glue output and reduce waste of glue, and can maintain the sealing of the entire glue flow channel during normal glue output.

[0004] To solve the above technical problem, the technical solution adopted by the utility model is: a plunger glue supply pump, comprising: a vertically arranged air cylinder, a glue taking cylinder sleeve connected to the cylinder body part of the air cylinder at the upper end, and a pressure plate arranged directly below the glue taking cylinder sleeve. The lower end of an upper connecting shaft vertically installed at the lower end of the piston rod of the air cylinder penetrates into the glue taking cylinder sleeve. A glue discharge through hole communicating with the inner cavity of the glue taking cylinder sleeve is opened in the center of the upper surface of the pressure plate. A glue discharge port is opened on the side wall of the upper end of the glue taking cylinder sleeve communicating with the glue discharge through hole at the lower end. A sealing component is arranged between the upper part of the glue discharge port and between the glue taking cylinder sleeve and the upper connecting shaft. The lower end of the upper connecting shaft connected to the piston rod of the air cylinder at the upper end is connected with a lower connecting shaft through a connecting rod. A glue taking spoon capable of extending into the glue discharge through hole of the pressure plate is installed on the vertically extending lower connecting shaft.

[0005] A glue discharge port is opened on the side wall of the glue taking cylinder sleeve at the same height as the glue discharge port. The other end of the glue discharge port communicating with the inner cavity of the glue taking cylinder sleeve is hermetically installed with a horizontally arranged glue discharge cross bar. A glue discharge channel extending in the horizontal direction is opened in the glue discharge cross bar. An installation hole with an inner diameter larger than that of the glue discharge channel is opened at the end of the glue discharge cross bar opposite to the glue discharge port. The other end of the glue discharge channel communicating with the glue discharge port is communicated with the installation hole through a tapered hole. A glue discharge hole communicating with the installation hole is opened on the outer surface of the glue discharge cross bar at the end of the installation hole close to the glue discharge channel. The main body part of a glue discharge screw embedded in the installation hole is threadedly connected with the inner wall of the installation hole. The main body part of the glue discharge screw has a sealing part extending towards the glue discharge channel and capable of sealingly cooperating with the glue discharge channel at the end towards the glue discharge channel. A glue discharge gap communicating with the glue discharge hole is formed between the sealing part and the inner wall of the installation hole.

[0006] The further improved solutions in the above technical solutions are as follows:

[0007] 1. In the above solution, the surface of the glue-sealing part of the glue-draining screw facing one end of the glue-draining channel is a spherical surface.

[0008] 2. In the above solution, one end of the main body part located outside the installation hole has a flange part extending radially outward, and a wrench hole is provided on the flange part.

[0009] 3. In the above solution, an air outlet penetrating up and down is provided on the upper surface of the pressure plate and outside the glue outlet through hole. The lower end of a sealing rod penetrates into the air outlet and is hermetically connected to the air outlet by a thread.

[0010] 4. In the above solution, a glue-passing sleeve is hermetically connected to the lower end of the glue-taking cylinder sleeve and above the glue-taking spoon. The lower end of the glue-passing sleeve with a sealing plate at the upper end is hermetically connected to a glue-sucking cylinder, and the lower end of the glue-sucking cylinder is embedded in the glue outlet through hole on the pressure plate.

[0011] Due to the application of the above technical solutions, the present utility model has the following advantages compared with the prior art:

[0012] For the plunger glue supply pump of the present utility model, a glue-draining port is provided on the side wall of the glue-taking cylinder sleeve at the same height as the glue outlet. A horizontally arranged glue-draining cross bar is hermetically installed at the other end of the glue-draining port communicating with the inner cavity of the glue-taking cylinder sleeve. A glue-draining channel extending in the horizontal direction is provided in the glue-draining cross bar. An installation hole with an inner diameter larger than that of the glue-draining channel is provided at the end of the glue-draining cross bar opposite to the glue-draining port. The other end of the glue-draining channel communicating with the glue-draining port is communicated with the installation hole through a tapered hole. A glue-draining hole communicating with the installation hole is provided on the outer surface of the glue-draining cross bar at the end of the installation hole close to the glue-draining channel. The main body part of the glue-draining screw embedded in the installation hole is threadedly connected to the inner wall of the installation hole. The main body part of the glue-draining screw facing the glue-draining channel has a glue-sealing part extending towards the glue-draining channel and capable of hermetically cooperating with the glue-draining channel. A glue-draining gap communicating with the glue-draining hole is formed between the glue-sealing part and the inner wall of the installation hole. This not only facilitates timely and quickly discharging the air and residual glue in the glue flow channel through the glue-draining port before each restart of glue discharging and reduces the waste of glue, but also can maintain the tightness of the entire glue flow channel during normal glue discharging. Description of the Drawings

[0013] Att Figure 1 is a schematic structural diagram of the plunger glue supply pump of the present utility model;

[0014] Att Figure 2 is a schematic cross-sectional view of the present utility model along A-A in Att Figure 1 in;

[0015] AttFigure 3 It is the enlarged schematic view of the position B in the Figure 2 present utility model;

[0016] Appendix Figure 4 It is the enlarged schematic view of the position C in the Figure 2 present utility model;

[0017] Appendix Figure 5 It is the partial structural schematic view of the plunger glue supply pump of the present utility model;

[0018] Appendix Figure 6 It is the sectional schematic view along D-D in the Figure 5 present utility model;

[0019] Appendix Figure 7 It is the enlarged schematic view of the position E in the Figure 6 present utility model.

[0020] In the above-mentioned drawings: 1. pressure plate; 2. sealing groove; 3. sealing ring; 4. glue outlet through hole; 5. flange ring; 6. gasket; 7. cover plate; 71. through hole; 8. connecting sleeve; 91. air vent; 92. sealing rod; 10. movable part; 11. movable sleeve; 111. glue outlet hole; 12. glue inlet chamber; 13. glue storage chamber; 14. glue outlet chamber; 15. glue outlet channel; 16. retaining ring; 17. lower nut; 171. first flange portion; 18. glue discharge port; 19. glue discharge cross bar; 191. glue discharge channel; 192. mounting hole; 193. glue discharge cross bar; 194. glue discharge hole; 195. glue discharge gap; 20. glue discharge screw; 201. main body portion; 202. glue sealing portion; 203. flange portion; 204. wrench hole; 21. cylinder; 211. cylinder body portion; 212. piston rod; 22. glue taking cylinder sleeve; 23. sealing assembly; 24. upper connecting shaft; 241. stop portion; 251. round nut; 252. fixing plate; 253. positioning post; 254. support plate; 26. glue outlet; 27. glue passing sleeve; 271. sealing plate; 272. glue passing through hole; 28. glue suction cylinder; 281. second flange portion; 29. connecting rod; 291. protruding portion; 30. lower connecting shaft; 31. glue taking spoon. Specific embodiments

[0021] The present patent can be further clearly understood through the following specific embodiments, but they do not limit the present patent.

[0022] Embodiment 1: A plunger glue supply pump, comprising: a vertically arranged air cylinder 21, a glue taking cylinder sleeve 22 whose upper end is connected to the cylinder body part 211 of the air cylinder 21, and a pressing plate 1 arranged directly below the glue taking cylinder sleeve 22. The lower end of an upper connecting shaft 24 vertically installed at the lower end of the piston rod 212 of the air cylinder 21 penetrates into the glue taking cylinder sleeve 22. A glue outlet through hole 4 communicating with the inner cavity of the glue taking cylinder sleeve 22 is opened at the center of the upper surface of the pressing plate 1. A glue outlet 26 is opened on the side wall of the upper end of the glue taking cylinder sleeve 22 communicating with the glue outlet through hole 4 on the pressing plate 1. A sealing assembly 23 is arranged above the glue outlet 26 and between the glue taking cylinder sleeve 22 and the upper connecting shaft 24. The lower end of the upper connecting shaft 24 whose upper end is connected to the piston rod 212 of the air cylinder 21 is connected to a lower connecting shaft 30 through a connecting rod 29. A glue taking spoon 31 that can extend into the glue outlet through hole 4 of the pressing plate 1 is installed on the vertically extending lower connecting shaft 30;

[0023] A glue discharging port 18 is opened on the side wall of the glue taking cylinder sleeve 22 at the same height as the glue outlet 26. The other end of the glue discharging port 18 whose one end is communicated with the inner cavity of the glue taking cylinder sleeve 22 is hermetically installed with a horizontally arranged glue discharging cross bar 19. A glue discharging channel 191 extending in the horizontal direction is opened in the glue discharging cross bar 19. An installation hole 192 with an inner diameter larger than that of the glue discharging channel 191 is opened at the end of the glue discharging cross bar 19 opposite to the glue discharging port 18. The other end of the glue discharging channel 191 whose one end is communicated with the glue discharging port 18 is communicated with the installation hole 192 through a tapered hole 193. A glue discharging hole 194 communicating with the installation hole 192 is opened on the outer surface of the glue discharging cross bar 19 at the end of the installation hole 192 close to the glue discharging channel 191. The main body part 201 of a glue discharging screw 20 whose one end is embedded in the installation hole 192 is threadedly connected with the inner wall of the installation hole 192. One end of the main body part 201 of the glue discharging screw 20 facing the glue discharging channel 191 has a sealing part 202 extending towards the glue discharging channel 191 and capable of sealingly cooperating with the glue discharging channel 191. A glue discharging gap 195 communicating with the glue discharging hole 194 is formed between the sealing part 202 and the inner wall of the installation hole 192;

[0024] Before each time of re-supplying glue out of the glue outlet, first close the glue outlet and simultaneously rotate the glue discharging screw so that a gap is formed between the glue sealing part on the glue discharging screw and the glue discharging channel, thereby connecting the glue taking cylinder sleeve with the glue discharging hole, enabling the air in the glue flow channel, the residual glue that is not suitable for directly acting on the product to be dot-glued, etc. to be discharged out of the glue discharging hole until qualified glue is discharged. At this time, rotate the glue discharging screw in the reverse direction so that the glue sealing part on the glue discharging screw is sealed with the glue discharging channel, and then open the glue outlet to supply glue normally. Thus, before each time of restarting glue discharging, the air and residual glue in the glue flow channel can be discharged in a timely and rapid manner through the glue discharging port, and the operation is simple, the glue discharging flow channel is short, the waste of glue can be reduced, and the sealing performance of the entire glue flow channel can be maintained during the normal glue discharging process.

[0025] The surface of the glue sealing part 202 of the above-mentioned glue discharging screw 20 facing one end of the glue discharging channel 191 is a spherical surface.

[0026] One end of the above-mentioned main body part 201 located outside the mounting hole 192 has a flange part 203 extending radially outward, and a wrench hole 204 is formed on the flange part 203.

[0027] On the upper surface of the above-mentioned pressure plate 1 and outside the glue discharging through hole 4, there is a through hole 91 penetrating up and down. The lower end of a sealing rod 92 penetrates into the through hole 91 and is hermetically connected with the through hole 91 by threads.

[0028] The lower end of the above-mentioned sealing rod 92 is set to be a pointed cone shape, and a handle is provided at the upper end of the sealing rod 92.

[0029] The lower end of the above-mentioned glue taking cylinder sleeve 22 and above the glue taking spoon 31 is hermetically connected with a glue passing sleeve 27. The lower end of the glue passing sleeve 27 with a sealing plate 271 at the upper end is hermetically connected with a glue sucking cylinder 28, and the lower end of the glue sucking cylinder 28 is embedded into the glue discharging through hole 4 on the pressure plate 1.

[0030] A round nut 251 is sleeved on the outside of the upper end of the above-mentioned glue taking cylinder sleeve 22. Below the round nut 251 threadedly connected with the glue taking cylinder sleeve 22 and on the outside of the glue taking cylinder sleeve 22, a fixing plate 252 is sleeved. The lower surface of the round nut 251 abuts against the upper surface of the fixing plate 252, and the fixing plate 252 is connected with the support plate 254 through at least two vertically arranged positioning columns 253.

[0031] Embodiment 2: A plunger glue supply pump, comprising: a vertically arranged air cylinder 21, a glue taking cylinder sleeve 22 with its upper end connected to the cylinder body 211 of the air cylinder 21, and a pressure plate 1 arranged directly below the glue taking cylinder sleeve 22. The lower end of an upper connecting shaft 24 vertically installed at the lower end of the piston rod 212 of the air cylinder 21 penetrates into the glue taking cylinder sleeve 22. A glue outlet through hole 4 communicating with the inner cavity of the glue taking cylinder sleeve 22 is provided in the center of the upper surface of the pressure plate 1. An adhesive outlet 26 is provided on the side wall of the upper end of the glue taking cylinder sleeve 22 communicating with the glue outlet through hole 4 on the pressure plate 1 at the lower end. A sealing assembly 23 is arranged between the upper part of the adhesive outlet 26 and between the glue taking cylinder sleeve 22 and the upper connecting shaft 24. The lower end of the upper connecting shaft 24 with its upper end connected to the piston rod 212 of the air cylinder 21 is connected to a lower connecting shaft 30 through a connecting rod 29. A glue taking spoon 31 that can extend into the glue outlet through hole 4 of the pressure plate 1 is installed on the vertically extending lower connecting shaft 30;

[0032] During use, first place it into the incoming material glue bucket, and ensure a seal between the pressure plate and the inner wall of the incoming material glue bucket;

[0033] Maintain the pressure between the pressure plate and the glue liquid level, so that the glue liquid in the glue bucket enters the glue outlet through hole. Start the air cylinder, and drive the glue taking spoon through the repeated pulling and pushing of the piston rod of the air cylinder to continuously output the glue liquid in the glue outlet through hole from the adhesive outlet of the glue taking cylinder sleeve

[0034] A glue discharge port 18 is provided on the side wall of the glue taking cylinder sleeve 22 at the same height as the adhesive outlet 26. The other end of the glue discharge port 18 with one end communicating with the inner cavity of the glue taking cylinder sleeve 22 is hermetically installed with a horizontally arranged glue discharge cross bar 19. A glue discharge channel 191 extending in the horizontal direction is provided in the glue discharge cross bar 19. An installation hole 192 with an inner diameter larger than that of the glue discharge channel 191 is provided at the end of the glue discharge cross bar 19 opposite to the glue discharge port 18. The other end of the glue discharge channel 191 with one end communicating with the glue discharge port 18 communicates with the installation hole 192 through a tapered hole 193. A glue discharge hole 194 communicating with the installation hole 192 is provided on the outer surface of the glue discharge cross bar 19 at the end of the installation hole 192 close to the glue discharge channel 191. The main body 201 of a glue discharge screw 20 with one end embedded in the installation hole 192 is threadedly connected to the inner wall of the installation hole 192. The main body 201 of the glue discharge screw 20 has a sealing part 202 extending towards the glue discharge channel 191 and capable of sealingly cooperating with the glue discharge channel 191 at one end facing the glue discharge channel 191. A glue discharge gap 195 communicating with the glue discharge hole 194 is formed between the sealing part 202 and the inner wall of the installation hole 192.

[0035] The surface of the sealing part 202 of the above-mentioned glue discharge screw 20 facing the glue discharge channel 191 is a spherical surface.

[0036] One end of the above-mentioned main body 201 located outside the mounting hole 192 has a flange portion 203 extending radially outward, and a wrench hole 204 is formed in the flange portion 203.

[0037] A glue-passing sleeve 27 is hermetically connected to the lower end of the above-mentioned glue-taking cylinder sleeve 22 and above the glue-taking spoon 31. The lower end of the glue-passing sleeve 27 with a sealing plate 271 at the upper end is hermetically connected to a glue-sucking cylinder 28, and the lower end of the glue-sucking cylinder 28 is embedded in the glue outlet through-hole 4 on the pressing disc 1.

[0038] An active part 10 that can move in the vertical direction is arranged below the sealing plate 271 in the above-mentioned glue-passing sleeve 27. The lower part of the active part 10 hermetically sleeved on the lower connecting shaft 30 can be hermetically connected to the upper end of the glue-sucking cylinder 28, so as to form a glue inlet chamber 12 between the glue-passing sleeve 27, the glue-sucking cylinder 28 and the active part 10. An active sleeve 11 is sleeved outside the connecting rod 29. A stop portion 241 is arranged above the active sleeve 11 that can move in the vertical direction. The outer surface of the lower part of the active sleeve 11 is hermetically connected to the inner wall of the glue-taking cylinder sleeve 22, so as to form a glue storage chamber 13 between the lower part of the active sleeve 11 and the sealing plate 271 of the glue-passing sleeve 27. The lower part of the connecting rod 29 has a convex portion 291 extending radially outward. The lower end of the active sleeve 11 can be hermetically fitted with the upper surface of the convex portion 291, so as to form a glue outlet chamber 14 between the active sleeve 11 and the connecting rod 29. The glue inlet chamber 12 and the glue storage chamber 13 are communicated through a plurality of glue-passing through-holes 272 formed in the sealing plate 271. A glue outlet hole 111 communicated with the glue outlet chamber 14 is formed in the side wall of the upper part of the active sleeve 11, and a glue outlet channel 15 is provided between the glue outlet hole 111 and the glue outlet 26 on the glue-taking cylinder sleeve 22.

[0039] The above-mentioned stop portion 241 is arranged at the lower part of the upper connecting shaft 24.

[0040] The upper surface of the convex portion 291 on the above-mentioned connecting rod 29 is a tapered surface with an open lower end, and the lower end of the active sleeve 11 is provided with an inner chamfered surface that can fit with the tapered surface.

[0041] A retaining ring 16 is arranged between the above-mentioned glue-passing sleeve 27 and the glue-sucking cylinder 28. The upper surface of the retaining ring 16 is hermetically connected to the lower end surface of the glue-passing sleeve 27 through an O-ring, and its lower surface is hermetically connected to the upper end surface of the glue-sucking cylinder 28 through an O-ring. The upper end of the retaining ring 16 is provided with an inner chamfer, and the inner chamfered surface is in sealed contact with the active part 10.

[0042] A lower nut 17 is threadedly connected to the outer wall of the lower end of the above-mentioned glue-taking cylinder sleeve 22. The lower nut 17 is sleeved outside the glue-passing sleeve 27 and is hermetically connected to the outer wall of the glue-passing sleeve 27.

[0043] On the inner wall at the lower end of the lower nut 17, there is a first flange portion 171 extending radially inwards. On the outer wall at the upper end of the glue suction cylinder 28, there is a second flange portion 281 extending radially outwards. The lower surface of the second flange portion 281 is in lap contact with the upper surface of the first flange portion 171, and the outer surface of the second flange portion 281 is sealingly connected to the inner wall of the lower nut 17.

[0044] Between the lower nut 17 and the pressure plate 1 and outside the glue suction cylinder 28, there is a connecting sleeve 8. The lower end of the connecting sleeve 8 is embedded in a flange ring 5 and is sealingly connected to the inner wall of the flange ring 5. The flange ring 5 is bolted to the upper surface of the pressure plate 1, and the inner wall of the connecting sleeve 8 is sealingly connected to the outer wall of the glue suction cylinder 28.

[0045] Between the flange ring 5 and the upper surface of the pressure plate body 1, there is a sealing gasket 6.

[0046] The working principle of the present utility model is as follows:

[0047] During use, first place it into the incoming material glue bucket, and keep the pressure plate in a sealed state with the inner wall of the incoming material glue bucket.

[0048] Maintain the pressure between the pressure plate and the glue liquid level, so that the glue liquid in the glue bucket enters the glue outlet through hole. Start the cylinder, and drive the glue scooping spoon through the repeated pulling and pushing of the cylinder piston rod to continuously output the glue liquid in the glue outlet through hole from the glue outlet of the glue cylinder sleeve outwards.

[0049] Before each time of supplying glue outwards through the glue outlet again, first close the glue outlet and at the same time rotate the glue discharging screw so that a gap is formed between the glue sealing portion on the glue discharging screw and the glue discharging channel, thereby connecting the glue cylinder sleeve and the glue discharging hole, and enabling the air in the glue flow channel, the residual glue that is not suitable for directly acting on the product to be dot-glued, etc. to be discharged outwards from the glue discharging hole until qualified glue is discharged. At this time, rotate the glue discharging screw in the reverse direction so that the glue sealing portion on the glue discharging screw is sealed with the glue discharging channel, and then open the glue outlet to supply glue normally. Thus, before each time of starting to discharge glue again, the air and residual glue in the glue flow channel can be discharged in a timely and rapid manner through the glue discharging port, and the operation is simple, the glue discharging flow channel is short, the waste of glue can be reduced, and the sealing performance of the entire glue flow channel can be maintained during the normal glue discharging process.

[0050] When adopting the above plunger glue supply pump, it is both convenient to discharge the air and residual glue in the glue flow channel in a timely and rapid manner through the glue discharging port before each time of starting to discharge glue again and reduce the waste of glue, and can maintain the sealing performance of the entire glue flow channel during the normal glue discharging process.

[0051] The above embodiments are only used to illustrate the technical concept and features of the present utility model. The purpose is to enable those skilled in the art to understand the content of the present utility model and implement it accordingly, and it should not be used to limit the protection scope of the present utility model. Any equivalent changes or modifications made according to the spirit and essence of the present utility model should be covered within the protection scope of the present utility model.

Claims

1. A plunger glue supply pump, comprising: A vertically arranged air cylinder (21), a glue-taking cylinder sleeve (22) with its upper end connected to the cylinder body part (211) of the air cylinder (21), and a pressure plate (1) arranged directly below the glue-taking cylinder sleeve (22), characterized in that: the lower end of an upper connecting shaft (24) vertically installed at the lower end of the piston rod (212) of the air cylinder (21) penetrates into the glue-taking cylinder sleeve (22), a glue outlet through hole (4) communicating with the inner cavity of the glue-taking cylinder sleeve (22) is opened at the center of the upper surface of the pressure plate (1), a glue outlet (26) is opened on the side wall of the upper end of the glue-taking cylinder sleeve (22) whose lower end communicates with the glue outlet through hole (4) on the pressure plate (1), a sealing assembly (23) is arranged between the glue outlet (26) and above and between the glue-taking cylinder sleeve (22) and the upper connecting shaft (24), the lower end of the upper connecting shaft (24) whose upper end is connected to the piston rod (212) of the air cylinder (21) is connected with a lower connecting shaft (30) through a connecting rod (29), and a glue-taking spoon (31) capable of extending into the glue outlet through hole (4) of the pressure plate (1) is installed on the vertically extending lower connecting shaft (30); A glue discharging port (18) is opened on the side wall of the glue-taking cylinder sleeve (22) and is arranged at the same height as the glue outlet (26), a horizontally arranged glue discharging cross bar (19) is hermetically installed at the other end of the glue discharging port (18) whose one end communicates with the inner cavity of the glue-taking cylinder sleeve (22), a glue discharging channel (191) extending in the horizontal direction is opened in the glue discharging cross bar (19), an installation hole (192) with an inner diameter larger than that of the glue discharging channel (191) is opened at the end of the glue discharging cross bar (19) opposite to the glue discharging port (18), the other end of the glue discharging channel (191) whose one end communicates with the glue discharging port (18) communicates with the installation hole (192) through a tapered hole (193), a glue discharging hole (194) communicating with the installation hole (192) is opened on the outer surface of the glue discharging cross bar (19) and at the end of the installation hole (192) close to the glue discharging channel (191), the main body part (201) of a glue discharging screw (20) whose one end is embedded in the installation hole (192) is threadedly connected with the inner wall of the installation hole (192), the end of the main body part (201) of the glue discharging screw (20) facing the glue discharging channel (191) has a sealing part (202) extending towards the glue discharging channel (191) and capable of sealingly cooperating with the glue discharging channel (191), and a glue discharging gap (195) communicating with the glue discharging hole (194) is formed between the sealing part (202) and the inner wall of the installation hole (192).

2. The plunger glue supply pump according to claim 1, wherein: The surface of the sealing part (202) of the glue discharging screw (20) facing the glue discharging channel (191) is a spherical surface.

3. The plunger glue supply pump according to claim 1, characterized in that: The main body part (201) has a radially outward flange part (203) at the end located outside the installation hole (192), and a wrench hole (204) is opened on the flange part (203).

4. The plunger glue supply pump according to claim 1, characterized in that: An air vent (91) penetrating up and down is provided on the upper surface of the pressure plate (1) and outside the glue outlet through hole (4). The lower end of a sealing rod (92) penetrates into the air vent (91) and is sealingly connected to the air vent (91) by a thread.

5. The plunger glue supply pump according to claim 1, characterized in that: A glue passing sleeve (27) is sealingly connected to the lower end of the glue taking cylinder sleeve (22) and above the glue taking spoon (31). A glue suction cylinder (28) is sealingly connected to the lower end of the glue passing sleeve (27) with a sealing plate (271) at the upper end. The lower end of the glue suction cylinder (28) is embedded in the glue outlet through hole (4) on the pressure plate (1).

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