A glue - dispensing device for a fully automatic box gluing machine

Abstract

A glue dispensing device of a full-automatic box gluing machine disclosed by the present invention. The device comprises a connecting frame, a driving cylinder and a valve body. The driving cylinder is arranged at the top end of the connecting frame, and the valve body is at the bottom end of the connecting frame. There are upper and lower chambers in the valve body, and a conduction port is arranged between the two. The valve core at the conduction port can slidably connect the two chambers. The working rod of the driving cylinder is connected to the valve core. The valve body is provided with a feed joint communicating with the upper chamber, and a glue dispensing head is arranged at the bottom end communicating with the lower chamber. When the valve core moves downward, the glue liquid is ejected from the glue dispensing head through the feed joint and the two chambers. A closing mechanism is arranged at the bottom of the glue dispensing head, forming a closed cavity when not working and opening when working. There is also a pressurizing member in the closed cavity. When the valve body changes from the working state to the non-working state, the closing mechanism forms a closed cavity at the bottom end of the glue dispensing head, and then the pressurizing member pressurizes it, so that the residual glue liquid at the bottom end of the glue dispensing head is sucked back. This design effectively solves the problem of glue adhesion when guiding the residual glue liquid to flow back in the existing glue dispensing device, and improves the performance and reliability of the glue dispensing device.

Description

Technical Field

[0001] The present invention relates to the technical field of dispensing devices, and particularly to a dispensing device for a fully automatic box gluing machine. Background Art

[0002] With the rapid development of the printing industry, box gluing process equipment has been widely used in the manufacturing and processing of packaging boxes in fields such as food, medicine, liquor, and industrial products. The working process of a fully automatic box gluing machine is as follows: The semi-finished paper box board after cross-cutting is placed at its paper feeding position. Thereafter, under the conveying action of the conveyor belt, the paper box board successively completes processes such as indentation, gluing, folding, and pressing and sticking, and then is conveyed to the box gluing area at the rear end of the equipment for pressurized packing operation. This process realizes the full-automatic control of the box gluing process and significantly improves the production efficiency.

[0003] There are certain technical problems in the currently adopted dispensing device: When the dispensing device is in a stopped state, due to the fluid characteristics of the glue, the glue stored in the dispensing device may leak, or solidify at the glue outlet. The dripping of the glue will damage the appearance quality of the paper box board and have a negative impact on the forming accuracy of the paper box; while the solidified glue at the glue outlet will cause the inner diameter of the glue outlet to decrease, thereby reducing the extrusion rate of the glue and affecting the production efficiency and product quality.

[0004] In the prior art, for example, the Chinese invention patent application (publication number CN113578678A) discloses a dispensing device for a packaging paper box, including: a glue tube, one end of which is a conical glue outlet end, and the other end is hermetically and slidably provided with a pushing assembly; a fixed heating assembly fixedly installed at the glue outlet end of the glue tube for heating the glue at the glue outlet end of the glue tube; a sealing and cleaning assembly, which includes a mounting plate, a sealing plate, and a power-on rod. An installation opening is formed in the middle of the mounting plate, and the two sealing plates are symmetrically and slidably arranged inside the installation opening through a sliding assembly. The two power-on rods are symmetrically and vertically fixedly connected to the mounting plate. Two sliding openings are symmetrically formed at the bottom of the fixed heating assembly, and the power-on rods are limited and slidably arranged in the sliding openings; a retaining ring slidably arranged at the bottom of the mounting plate through an adjusting assembly.

[0005] When the glue dispensing device performs glue scraping operation during use, the glue is extremely likely to adhere to the sealing plate. The adhesion of the glue not only affects the normal opening and closing function of the sealing plate, reduces the mechanical operation efficiency of the device, but also may cause uneven distribution of the glue, thereby affecting the quality and accuracy of glue dispensing. On the other hand, the working process of the glue dispensing device requires that the abutting ring be abutted against the cardboard box board before the sealing plate can be opened for glue dispensing. In the production mode of cardboard box glue dispensing in a pipeline style, this working method makes the glue dispensing device need to continuously perform reciprocating lifting movements. Frequent lifting operations will destroy the stable state of the glue in the device, cause air to mix into the glue, and thus generate bubbles in the glue in the glue dispensing device. The existence of these bubbles will further affect the continuity and uniformity of glue dispensing, and reduce the production quality and consistency of products. Summary of the Invention

[0006] Aiming at the problems of the prior art, a glue dispensing device for a fully automatic box gluing machine is provided. The closing mechanism is arranged at the bottom end of the valve body. When the valve body changes from the working state to the non-working state, the closing mechanism can form a closed cavity at the bottom end of the glue dispensing head. After the closed cavity is formed, the pressurizing member can pressurize the closed cavity, so that the residual glue at the bottom end of the glue dispensing head can be sucked back into the glue dispensing head under the action of pressure, solving the problem of glue adhesion when the existing glue dispensing device guides the residual glue to flow back into the glue dispensing head.

[0007] To solve the problems of the prior art, the present invention provides

[0008] A glue dispensing device for a fully automatic box gluing machine, comprising:

[0009] A valve body and a glue dispensing head arranged at the bottom of the valve body; a closing mechanism is arranged at the bottom of the glue dispensing head;

[0010] In the non-working state, the closing mechanism is closed to form a closed cavity at the bottom of the glue dispensing head; in the working state, the closing mechanism is opened to expose the glue dispensing head;

[0011] A pressurizing member for pressurizing the closed cavity is arranged in the closed cavity.

[0012] Preferably, the closing mechanism includes two clamping seats symmetrically arranged outside the glue dispensing head that can move towards or away from each other. Both clamping seats are provided with grooves that can cooperate with the outer wall of the glue dispensing head. A closed groove is formed at the bottom end of the groove. When the two clamping seats abut against each other, the two closed grooves are closed to form the closed cavity.

[0013] Preferably, a sliding block is arranged on the clamping seat and slides horizontally through the closed groove. After the two clamping seats abut against each other to clamp the glue dispensing head, the sliding block slides along the radial direction of the glue dispensing head to form the pressurizing member.

[0014] Preferably, a rib extending upward is provided at one end of the sliding block located in the closed groove, and a convex seat is provided on the outer side of the clamping seat. An elastic reset element is provided between the convex seat and the clamping seat.

[0015] Preferably, the closing mechanism further includes a transmission rod group rotatably provided at the bottom of the valve body. The transmission rod group has an inner connection end close to the dispensing head and an outer connection end far from the dispensing head; the inner connection end is rotatably connected to the clamping seat, and when the outer connection end deflects, it drives the clamping seat to clamp the dispensing head.

[0016] Preferably, the closing mechanism further includes a sliding plate group; the sliding plate group includes an upper sliding plate connected to the outer connection end, and an upper elastic connection assembly is provided between the upper sliding plate and the valve body.

[0017] Preferably, the sliding plate group further includes a lower sliding plate drivingly connected to the sliding block. When the lower sliding plate slides relative to the upper sliding plate, the sliding block squeezes the closed cavity.

[0018] Preferably, a lower elastic connection assembly is provided between the lower sliding plate and the upper sliding plate, and the elastic force of the upper elastic connection assembly is greater than that of the lower elastic connection assembly.

[0019] Preferably, a convex pin is provided at the outer end of the pressing member located on the clamping seat; an inclined block is provided on the inner side of the lower sliding plate facing the dispensing head. When the lower sliding plate moves downward relative to the upper sliding plate, the inclined surface of the inclined block abuts against the convex pin to guide the sliding block to slide into the closed groove.

[0020] Preferably, a connecting groove extending in the horizontal direction is provided on the sliding plate group, and the outer connection end is slidably provided in the connecting groove.

[0021] The beneficial effects of the present application compared with the prior art are as follows:

[0022] By providing a closing mechanism at the bottom end of the valve body in the present application, a closed cavity can be formed when switching from the working state to the non-working state, and then the pressing member pressurizes it to suck back the residual glue at the bottom end of the dispensing head. This effectively avoids the solidification or dripping of the residual glue outside, keeps the dispensing head clean at all times, ensures that the starting state of each dispensing is consistent, greatly improves the dispensing accuracy and quality, and provides a more stable and reliable dispensing effect for the carton gluing process.

[0023] It solves the problem of glue adhesion when guiding the residual glue to flow back in the existing dispensing device. The glue will not adhere to the equipment components, reducing equipment failures and downtime frequencies caused by adhesion. At the same time, the closed cavity can isolate external dust and impurities, prevent glue pollution and blockage, extend the service life of the dispensing device, and ensure the long-term stable operation of the equipment.

[0024] Moreover, by controlling the flow of the adhesive liquid and sucking back the residual adhesive liquid, the waste of the adhesive liquid is reduced, and the raw material cost is lowered. On the other hand, the equipment failures and maintenance requirements are reduced, and the maintenance cost and the production interruption time caused by maintenance are decreased. Also, in the assembly line production, the dispensing device can quickly switch states and continuously work stably, significantly improving the production efficiency and enhancing the economic benefits of the enterprise. Description of the Drawings

[0025] Figure 1 is a perspective view of the dispensing device of a fully automatic box gluing machine according to the present invention from the first perspective.

[0026] Figure 2 is a perspective view of the dispensing device of a fully automatic box gluing machine according to the present invention from the second perspective.

[0027] Figure 3 is a sectional view of the dispensing device of a fully automatic box gluing machine according to the present invention.

[0028] Figure 4 is a perspective view of the closing mechanism in the dispensing device of a fully automatic box gluing machine according to the present invention.

[0029] Figure 5 is a partial perspective exploded view of the closing mechanism in the dispensing device of a fully automatic box gluing machine according to the present invention.

[0030] Figure 6 is a perspective view of the clamping seat in the dispensing device of a fully automatic box gluing machine when clamping the dispensing head.

[0031] Figure 7 is Figure 6 a partial enlarged view of part A of

[0032] Figure 8 is a schematic view of the clamping seat in the dispensing device of a fully automatic box gluing machine when releasing the dispensing head.

[0033] Figure 9 is a perspective view of the clamping seat in the dispensing device of a fully automatic box gluing machine when releasing the dispensing head.

[0034] Figure 10 is Figure 9 a partial enlarged view of part B of

[0035] The reference numerals in the figure are: 1, connecting frame; 2, driving cylinder; 21, working rod; 3, valve body; 31, upper chamber; 32, lower chamber; 33, valve core; 34, feed joint; 35, dispensing head; 4, closing mechanism; 41, vertical seat; 411, horizontal seat; 421, upper connecting rod; 422, lower connecting rod; 423, connecting pin; 424, sliding rod; 43, clamping seat; 431, groove; 432, closing groove; 441, upper sliding plate; 4411, side ear; 4412, upper side plate; 4413, connecting groove; 442, lower sliding plate; 4421, lower side plate; 4422, inclined block; 451, upper positioning rod; 452, upper spring; 453, upper positioning ring; 461, lower positioning rod; 462, lower spring; 463, lower positioning ring; 47, roller; 5, pressing member; 51, sliding block; 511, convex pin; 512, convex strip; 513, convex seat; 52, elastic reset element. Detailed implementation manner

[0036] To further understand the features, technical means, specific purposes and functions achieved by the present invention, the present invention will be described in further detail below in conjunction with the accompanying drawings and specific implementation manners.

[0037] As Figures 1 to 10 shown, the present application provides a dispensing device for a fully automatic box gluing machine, including a connecting frame 1, a driving cylinder 2 arranged at the top end of the connecting frame 1, and a valve body 3 arranged at the bottom end of the connecting frame 1. An upper chamber 31 and a lower chamber 32 are arranged in the valve body 3. A conduction port is arranged between the upper chamber 31 and the lower chamber 32. A valve core 33 that can communicate the upper chamber 31 and the lower chamber 32 when sliding is arranged at the conduction port. The working rod 21 of the driving cylinder 2 extends into the valve body 3 and is connected to the valve core 33; A feed joint 34 communicating with the upper chamber 31 is further arranged on the valve body 3, and a dispensing head 35 communicating with the lower chamber 32 is arranged at the bottom end of the valve body 3; When the valve core 33 moves downward, the glue liquid passes through the upper chamber 31 and the lower chamber 32 from the feed joint 34 and is ejected outward through the dispensing head 35; A closing mechanism 4 that forms a closed cavity at the bottom of the dispensing head 35 in the non-working state and can open the closed cavity to expose the bottom of the dispensing head 35 in the working state is arranged at the bottom of the dispensing head 35. A pressing member 5 that pressurizes the closed cavity when the dispensing head 35 changes from the working state to the non-working state is further arranged in the closed cavity.

[0038] The dispensing device is mainly composed of a connecting frame 1, a driving cylinder 2 and a valve body 3. The connecting frame 1 serves as the support structure of the entire device, playing a role in stabilizing and connecting various components. The driving cylinder 2 is installed at the top end of the connecting frame 1. It is the power source of the entire device, providing driving force for the operation of the device. The valve body 3 is arranged at the bottom end of the connecting frame 1 and is the core working component of the dispensing device.

[0039] The interior of the valve body 3 is divided into two parts: an upper chamber 31 and a lower chamber 32. The upper chamber 31 and the lower chamber 32 are interconnected through a conduction port. At the conduction port, a slidable valve core 33 is installed. During the sliding process of this valve core 33, the connection or disconnection between the upper chamber 31 and the lower chamber 32 can be achieved, thereby controlling the flow of the glue. The working rod 21 of the driving cylinder 2 extends downward into the valve body 3 and is connected to the valve core 33. When the driving cylinder 2 operates, the telescopic movement of the working rod 21 can drive the valve core 33 to slide at the conduction port.

[0040] The valve body 3 is also equipped with a feed joint 34, which is connected to the upper chamber 31 and is the inlet for the glue to enter the dispensing device. At the bottom end of the valve body 3, a dispensing head 35 connected to the lower chamber 32 is provided, and the glue is finally accurately ejected through the dispensing head 35 to the position where dispensing is required.

[0041] When the dispensing device is in the working state, the driving cylinder 2 pushes the working rod 21 downward, driving the valve core 33 to move downward. At this time, the upper chamber 31 and the lower chamber 32 are connected through the conduction port, and the glue enters the upper chamber 31 from the feed joint 34, then flows through the conduction port into the lower chamber 32, and finally sprays out through the dispensing head 35 to complete the dispensing operation.

[0042] To solve the problem of glue adhesion when the existing dispensing device guides the residual glue back into the dispensing head 35, a sealing mechanism 4 is provided at the bottom of the dispensing head 35 of this dispensing device. When the dispensing device changes from the working state to the non-working state, the sealing mechanism 4 forms a sealed cavity at the bottom of the dispensing head 35. This sealed cavity can effectively isolate the dispensing head 35 from the external environment, preventing the glue from solidifying or dripping under the influence of external factors in the non-working state.

[0043] At the same time, a pressurizing member 5 is also provided in the sealed cavity. When the dispensing head 35 changes from the working state to the non-working state and the sealed cavity is formed, the pressurizing member 5 pressurizes the sealed cavity. Under the action of the pressure, the residual glue at the bottom end of the dispensing head 35 is sucked back into the dispensing head 35, avoiding the occurrence of glue adhesion caused by the residual glue outside the dispensing head 35, thereby ensuring the cleanliness of the dispensing device and the accuracy of the next dispensing operation. When the dispensing device enters the working state again, the sealing mechanism 4 opens the sealed cavity, exposing the bottom of the dispensing head 35 for the next dispensing operation.

[0044] Such as Figure 4 、 Figure 5 、 Figure 8 and Figure 9As shown in the figure, the closing mechanism 4 includes a vertical seat 41, a transmission rod group, a clamping seat 43 and a sliding plate group; there are two vertical seats 41, and the two vertical seats 41 are symmetrically arranged at the bottom end of the valve body 3 relative to the dispensing head 35, and both vertical seats 41 extend downward; the transmission rod group is rotatably arranged on the vertical seat 41, and the transmission rod group has an inner connection end close to the dispensing head 35 and an outer connection end far from the dispensing head 35; there are two clamping seats 43, and the two clamping seats 43 are symmetrically arranged at both ends of the valve body 3 relative to the dispensing head 35. Grooves 431 capable of cooperating with the outer wall of the dispensing head 35 are arranged at the opposite ends of the two clamping seats 43. A closing groove 432 is formed at the bottom end of the groove 431. When the two clamping seats 43 are in contact with each other, the closing grooves 432 of the two clamping seats 43 form a closed cavity. The clamping seat 43 is rotatably connected to the adjacent inner connection end; the sliding plate group is longitudinally slidably arranged at the bottom of the valve body 3, and the sliding plate is rotatably connected to the outer connection end. When the cardboard passes through the bottom end of the sliding plate group, the sliding plate group is lifted, and the sliding plate group moves upward relative to the dispensing head 35, and the transmission rod group drives the two clamping seats 43 to separate to expose the bottom end of the dispensing head 35.

[0045] There are also two clamping seats 43, which are distributed in the same way as the vertical seats 41. They are also centered on the dispensing head 35 and are respectively arranged at both ends of the valve body 3. At one end of each clamping seat 43 relative to the dispensing head 35, a groove 431 capable of closely cooperating with the outer wall of the dispensing head 35 is arranged. A closing groove 432 is further formed at the bottom end of the groove 431. When the two clamping seats 43 are in contact with each other during movement, the two closing grooves 432 will be butted to jointly form a closed cavity. The formation of this closed cavity can effectively isolate the dispensing head 35 from the external environment and prevent the glue from being affected by external factors in the non-working state, such as preventing the glue from solidifying, dripping or being contaminated by impurities. In addition, the clamping seat 43 is rotatably connected to the inner connection end of the adjacent transmission rod group, so that the clamping seat 43 can realize flexible opening and closing actions under the drive of the transmission rod group.

[0046] The sliding plate group is arranged at the bottom of the valve body 3 in a slidable manner along the longitudinal direction. The sliding plates in the sliding plate group are connected to the outer connection ends of the transmission rod group through a rotational connection. When the cardboard passes through the bottom end of the sliding plate group under the action of the conveying system of the carton gluing machine, the sliding plate group will be driven by the cardboard to move upward relative to the dispensing head 35. During the upward movement of the sliding plate group, through its rotational connection with the outer connection end of the transmission rod group, it drives the transmission rod group to rotate. The rotation of the transmission rod group further drives the two clamping seats 43 connected thereto to act, causing the two clamping seats 43 to separate from each other, thereby exposing the bottom end of the dispensing head 35 and preparing for the dispensing operation. When the cardboard completely exits the dispensing range of the dispensing head 35, the sliding plate group moves downward, driving the two clamping seats 43 to approach each other and clamp the dispensing head 35 through the transmission rod group. The closed grooves 432 of the two clamping seats 43 are combined again to form a closed cavity, realizing the closed protection of the dispensing head 35.

[0047] As Figure 5 shown, the transmission rod group includes an upper connecting rod 421 and a lower connecting rod 422; one end of the upper connecting rod 421 is rotationally connected to the upper part of the clamping seat 43, and the other end of the upper connecting rod 421 is rotationally connected to the vertical seat 41; one end of the lower connecting rod 422 is rotationally connected to the lower part of the clamping seat 43, and the other end of the lower connecting rod 422 is rotationally connected to the sliding plate group. A connecting pin 423 is provided on the lower connecting rod 422 and is rotationally connected to the vertical seat 41. A transmission section is formed between the connecting pin 423 and the connection end of the lower connecting rod 422 and the clamping seat 43, and a driving section is formed between the connecting pin 423 and the connection end of the lower connecting rod 422 and the sliding plate group. The transmission section is parallel to and has the same length as the upper connecting rod 421.

[0048] When the sliding plate group moves upward under the action of external factors such as the passing of the cardboard, it drives the driving section of the lower connecting rod 422 to deflect upward. Since the transmission section is parallel to and has the same length as the upper connecting rod 421, the transmission section of the lower connecting rod 422 cooperates with the upper connecting rod 421. This cooperation causes the upper connecting rod 421 and the lower connecting rod 422 to rotate around their respective connection points with the vertical seat 41, thereby driving the clamping seat 43 to move. Finally, the clamping seat 43 separates from the dispensing head 35, and the bottom end of the dispensing head 35 is exposed, creating conditions for the dispensing operation. After the dispensing operation is completed, when the sliding plate group moves downward, the driving section of the lower connecting rod 422 deflects downward, and through the cooperation of the transmission section and the upper connecting rod 421, it drives the clamping seat 43 to approach the dispensing head 35 again, realizing the closed protection of the dispensing head 35.

[0049] As Figure 5 、 Figure 7 and Figure 10As shown in the figure, the sliding plate group includes an upper sliding plate 441 and a lower sliding plate 442. The upper sliding plate 441 and the lower sliding plate 442 are sequentially arranged at the bottom end of the valve body 3 from top to bottom. An upper elastic connection component is arranged between the upper sliding plate 441 and the valve body 3, and a lower elastic connection component is arranged between the lower sliding plate 442 and the upper sliding plate 441. The elastic force of the upper elastic connection component is greater than that of the lower elastic connection component. The ends of the upper connecting rod 421 and the lower connecting rod 422 are rotatably connected to the inner side of the upper sliding plate 441 facing the dispensing head 35. A sliding block 51 is arranged on the clamping seat 43 and slides horizontally through the closed groove 432. When the two clamping seats 43 are abutted to clamp the dispensing head 35, the sliding block 51 slides to form the pressing member 5. A convex pin 511 is arranged at the outer end of the pressing member 5 located on the clamping seat 43. An inclined block 4422 is arranged on the inner side of the lower sliding plate 442 facing the dispensing head 35. When the lower sliding plate 442 moves downward relative to the upper sliding plate 441, the inclined surface of the inclined block 4422 abuts on the convex pin 511 to guide the sliding block 51 to slide into the closed groove 432.

[0050] When a cardboard passes through the bottom end of the lower sliding plate 442, due to the elastic force of the upper elastic connection component being greater than that of the lower elastic connection component, the lower sliding plate 442 first moves upward against the elastic force of the lower elastic connection seat component. Until the pressure of the lower sliding plate 442 on the upper sliding plate 441 is greater than the elastic force of the upper elastic connection component, the upper sliding plate 441 moves upward to drive the clamping seat 43 to separate through the lower connecting rod 422.

[0051] When the cardboard after dispensing ends moves away from the dispensing range of the dispensing head 35, there is no support at the bottom of the lower sliding plate 442. And because the elastic force of the upper elastic connection component is greater than that of the lower elastic connection component, first, the upper sliding plate 441 is reset under the action of the upper elastic connecting piece, and guides the clamping seat 43 to clamp the dispensing head 35 and form a closed cavity at the bottom of the dispensing head 35. The lower sliding plate 442 is reset under the action of the lower elastic connecting piece, and the inclined surface of the inclined block 4422 installed on the inner side of the lower sliding plate 442 can abut on the convex pin 511, thereby guiding the sliding block 51 on the clamping seat 43 to move into the closed cavity. The volume of the closed cavity decreases, and thus the pressure increases. The glue remaining at the bottom end of the dispensing head 35 will flow back into the dispensing head 35 under the action of the pressure, avoiding the glue remaining at the bottom end of the dispensing head 35 and blocking the dispensing head 35.

[0052] As Figure 7 and Figure 10 shown in the figure, the sliding block 51 is provided with a convex strip 512 extending upward at one end of the closed groove 432, and the sliding block 51 is provided with a convex seat 513 on the outer side of the clamping seat 43. An elastic reset element 52 is arranged between the convex seat 513 and the clamping seat 43.

[0053] When the lower sliding plate 442 moves upward relative to the upper sliding plate 441, under the action of the elastic reset element 52, the sliding block 51 can move outward relative to the closed groove 432 towards the outside of the clamping seat 43. Further, it is convenient for the sliding block 51 to slide into the closed cavity for pressurization during the next abutment of the clamping seat 43. The convex strip 512 and the convex seat 513 can both prevent the sliding block 51 from detaching from the clamping seat 43 and limit the sliding block 51.

[0054] As Figure 4 shown, rollers 47 are provided at the bottom end of the sliding plate group. When a cardboard passes under the bottom of the dispensing head 35, the rollers 47 roll on the top of the cardboard and move upward relative to the valve seat.

[0055] In the non-working state of the dispensing head 35, the bottom end of the roller 47 is lower than the upper surface of the cardboard. When the cardboard passes, the edge of the cardboard can first abut on the surface of the roller 47 and then roll upward, so that the upper sliding frame and the lower sliding member can move upward to form a closed cavity and a closed groove 432.

[0056] As Figure 4 shown, a horizontal seat 411 is provided at the top end of the vertical seat 41, and side ears 4411 are provided on the upper sliding plate 441. The upper elastic connection assembly includes an upper positioning rod 451, an upper spring 452, and an upper positioning ring 453; there are four upper positioning rods 451, and the four upper positioning rods 451 are longitudinally arranged at the bottom end of the horizontal seat 411, and the upper positioning rods 451 slidably penetrate through the side ears 4411; the upper spring 452 is sleeved on the upper positioning rod 451, and the upper spring 452 is located between the horizontal seat 411 and the upper sliding plate 441; the upper positioning ring 453 is provided on the lower positioning rod 461 and is located at the bottom end of the side ears 4411.

[0057] Under the action of the upper positioning rod 451, the upper sliding plate 441 can stably move up and down longitudinally at the bottom of the valve body 3, and the upper spring 452 can be compressed when the upper sliding plate 441 moves upward, and can quickly guide the upper sliding plate 441 to move downward when there is no pressure at the bottom of the upper sliding plate 441, so as to realize the clamping of the dispensing head 35 by the clamping seat 43. The upper positioning ring 453 can prevent the upper sliding plate 441 from detaching from the upper positioning rod 451.

[0058] As Figure 4As shown, an upper side plate 4412 is further provided on the upper sliding plate 441, and a lower side plate 4421 is further provided on the lower sliding plate 442. The lower elastic connection assembly includes a lower positioning rod 461, an upper spring 452, and a lower positioning ring 463. The bottom end of the lower positioning rod 461 is fixedly connected to the lower side plate 4421, and the top end of the lower side plate 4421 slidably penetrates through the upper side plate 4412. The lower spring 462 is sleeved on the lower positioning rod 461. The lower spring 462 is located between the upper side plate 4412 and the lower side plate 4421, and the elastic force of the lower spring 462 is less than the elastic force of the upper spring 452. The lower positioning ring 463 is provided on the upper positioning rod 451 and is located at the top end of the upper side plate 4412.

[0059] Under the action of the lower limit rod, the lower sliding plate 442 can stably lift and lower at the bottom of the upper sliding plate 441, and the pressure of the lower spring 462 is less than the elastic force of the upper spring 452. The reset time of the upper sliding plate 441 is much less than the complete reset time of the lower sliding plate 442. Thus, after the clamping seat 43 clamps the dispensing head 35 to form a closed cavity, the sliding block 51 can move into the closed cavity to pressurize the closed cavity. The lower positioning ring 463 can effectively prevent the lower sliding plate 442 from detaching from the lower positioning rod 461.

[0060] As Figure 4 shown, a connecting groove 4413 extending in the horizontal direction is provided on the upper sliding plate 441. A sliding rod 424 is provided at the end of the lower connecting rod 422 away from the dispensing head 35, and the end of the sliding rod 424 is slidably provided in the connecting groove 4413.

[0061] When the upper sliding plate 441 moves upward, since the sliding rod 424 is provided at the end of the lower connecting rod 422 and the sliding rod 424 deflects around the connecting pin 423 as the axis, the sliding groove can effectively adapt to the deflection of the sliding rod 424, that is, the sliding rod 424 can slide in the sliding groove when deflecting. The lifting force of the upper sliding plate 441 can be transmitted to the lower connecting rod 422 to be converted into the deflection force of the lower connecting rod 422.

[0062] As Figure 7 shown, an outer connecting column is provided at one end of the convex seat 513 facing the clamping seat 43, and an inner connecting column is provided at one end of the clamping seat 43 facing the convex seat 513. The two ends of the elastic reset element 52 are in interference fit with the outer connecting column and the inner connecting column respectively.

[0063] By making the two ends of the elastic reset element 52 in interference fit with the outer connecting column and the inner connecting column respectively, it can effectively prevent the elastic reset element 52 from deviating between the clamping seat 43 and the convex seat 513, improving the structural stability.

[0064] The above embodiments merely represent one or several implementation manners of the present invention. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent for the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention shall be subject to the appended claims.

Claims

1. A glue dispensing device for a fully automatic folder gluer, comprising: A valve body and a dispensing head arranged at the bottom of the valve body; characterized in that a sealing mechanism is arranged at the bottom of the dispensing head; In the non-working state, the sealing mechanism is closed to form a closed cavity at the bottom of the dispensing head; in the working state, the sealing mechanism is opened to expose the dispensing head; A pressurizing member for pressurizing the closed cavity is arranged in the closed cavity; the closing mechanism includes two clamping seats symmetrically arranged on the outside of the dispensing head and capable of moving toward or away from each other, the two clamping seats are both provided with grooves that can cooperate with the outer wall of the dispensing head, and the bottom end of the groove forms a closed groove. When the two clamping seats abut against each other, the two closed grooves are closed to form the closed cavity; a sliding block is arranged on the clamping seat and slides transversely through the closed groove. When the two clamping seats abut against each other to clamp the dispensing head, the sliding block slides along the radial direction of the dispensing head to form the pressurizing member; The closing mechanism also includes a transmission rod group, which is rotatably arranged at the bottom of the valve body, and has an inner connecting end close to the dispensing head and an outer connecting end away from the dispensing head; the inner connecting end is rotatably connected to the clamping seat, and the outer connecting end drives the clamping seat to clamp the dispensing head when it deflects; The closing mechanism also includes a sliding plate assembly; The sliding plate assembly includes an upper sliding plate connected to the outer connecting end, and the sliding plate assembly also includes a lower sliding plate drivingly connected to the sliding block, and when the lower sliding plate slides relative to the upper sliding plate, the sliding block squeezes the closed cavity; The pressure piece is provided with a convex pin at the outer end of the clamping seat; the lower sliding plate is provided with an inclined block on the inner side facing the dispensing head, and when the lower sliding plate moves downward relative to the upper sliding plate, the inclined surface of the inclined block abuts against the convex pin to guide the sliding block to slide into the closed groove.

2. The glue dispensing device of the fully automatic folder-gluing machine according to claim 1, characterized in that: The sliding block is provided with a convex strip extending upward at one end of the closed groove, the sliding block is provided with a convex seat at the outer side of the clamping seat, and an elastic reset element is provided between the convex seat and the clamping seat.

3. The glue dispensing device of the fully automatic folder-gluing machine according to claim 1, characterized in that: An upper elastic connection component is arranged between the upper sliding plate and the valve body.

4. The glue dispensing device of the fully automatic folder-gluing machine according to claim 1, characterized in that: A lower elastic connection component is arranged between the lower sliding plate and the upper sliding plate, and the elastic force of the upper elastic connection component is greater than the elastic force of the lower elastic connection component.

5. The glue dispensing device of the fully automatic folder-gluing machine according to claim 3, characterized in that: The sliding plate group is provided with a connecting groove extending in a horizontal direction, and the outer connecting end is slidably arranged in the connecting groove.

Images