Dispensing device of full-automatic box pasting machine

Abstract

The glue dispensing 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, the valve body is arranged at the bottom end of the connecting frame, an upper cavity and a lower cavity are formed in the valve body, a communication opening is formed between the upper cavity and the lower cavity, a valve element at the communication opening is communicated with the two cavities in a sliding mode, and a working rod of the driving cylinder is connected with the valve element. The valve body is provided with a feeding connector communicated with the upper cavity, the dispensing head at the bottom end is communicated with the lower cavity, when the valve element moves downwards, glue liquid is sprayed out of the dispensing head through the feeding connector and the two cavities, a sealing mechanism is arranged at the bottom of the dispensing head, a sealing cavity is formed when the dispensing head does not work, and the dispensing head is opened when the dispensing head works, and a pressurizing piece is arranged in the sealing cavity. The sealing mechanism forms the sealing cavity at the bottom end of the dispensing head, and then the pressurizing piece pressurizes the sealing cavity, so that residual glue at the bottom end of the dispensing head is sucked back, the design effectively solves the problem of glue adhesion when an existing dispensing device guides the residual glue to flow back, and the performance and reliability of the dispensing device are improved.

Description

Technical Field

[0001] The invention relates to the technical field of glue dispensing devices, and in particular to a glue dispensing device for a full-automatic folder gluing machine. Background Art

[0002] With the rapid development of the printing industry, box gluing equipment has been widely used in the manufacturing and processing of packaging boxes in the fields of food, medicine, alcohol and industrial products. The working process of the fully automatic box gluing machine is as follows: the semi-finished carton board that has been cross-cut is placed in its paper feeding position. After that, the carton board is conveyed by the conveyor belt and completes the processes of creasing, gluing, folding and pressing in sequence. It is then conveyed to the box gluing area at the rear end of the equipment for pressurized packaging. This process realizes the full automation control of the box gluing process and significantly improves production efficiency.

[0003] The current dispensing device has certain technical problems: when the dispensing device is in an inactive 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 glue will damage the appearance quality of the carton board and have a negative impact on the molding accuracy of the carton; and the solidified glue at the glue outlet will cause the inner diameter of the glue outlet to decrease, thereby reducing the glue extrusion rate, affecting production efficiency and product quality.

[0004] In the prior art, for example, a Chinese invention patent application (publication number CN113578678A) discloses a glue dispensing device for a packaging paper box, comprising: a rubber hose, one end of which is a conical glue outlet end, and the other end of which is sealed and slidably provided with a pushing component; a fixed heating component, which is fixedly installed at the glue outlet end of the rubber hose and is used to heat the glue at the glue outlet end of the rubber hose; a sealing and cleaning component, which comprises a mounting plate, a sealing plate and a power-on rod, a mounting opening is opened in the middle of the mounting plate, two sealing plates are symmetrically slidably arranged inside the mounting opening through a sliding component, two power-on rods are symmetrically and vertically fixedly connected to the mounting plate, two sliding openings are symmetrically opened at the bottom of the fixed heating component, and the power-on rod is limitedly slidably arranged at the sliding opening; and a retaining ring, which is slidably arranged at the bottom of the mounting plate through an adjusting component.

[0005] When the dispensing device is used to scrape glue, the glue is very likely to stick to the sealing plate. The adhesion of glue will not only affect the normal opening and closing function of the sealing plate and reduce the mechanical operation efficiency of the device, but may also cause uneven distribution of glue, thereby affecting the quality and accuracy of dispensing. On the other hand, the workflow of the dispensing device requires that the sealing plate can be opened for dispensing only after the abutment ring is abutted against the carton plate. In the assembly line cardboard dispensing production mode, this working mode requires the dispensing device to continuously perform reciprocating lifting and lowering movements. Frequent lifting and lowering operations will destroy the stable state of the glue in the device, causing air to mix into the glue, thereby generating bubbles in the glue in the dispensing device. The presence of these bubbles will further affect the continuity and uniformity of dispensing, reducing the production quality and consistency of the product. Summary of the invention

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

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

[0008] Preferably, the closing mechanism comprises two clamping seats symmetrically arranged on the outside of the dispensing head and capable of moving toward or away from each other. Both clamping seats are provided with grooves that can cooperate with the outer wall of the dispensing head. A closing groove is formed at the bottom end of the groove. When the two clamping seats abut against each other, the two closing grooves are closed to form the closed cavity.

[0009] Preferably, a sliding block is provided on the clamping seat and slides transversely through the closed groove. When the two clamping seats are in contact with each other to clamp the dispensing head, the sliding block slides radially along the dispensing head to form the pressure member.

[0010] Preferably, a convex strip extending upward is provided at one end of the sliding block located in the closed groove, a convex seat is provided at the outer side of the clamping seat of the sliding block, and an elastic reset element is provided between the convex seat and the clamping seat.

[0011] Preferably, the closing mechanism also includes a transmission rod group, which is rotatably arranged at the bottom of the valve body, and the transmission rod group 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 is deflected.

[0012] Preferably, the closing mechanism further comprises a sliding plate group; the sliding plate group comprises an upper sliding plate connected to the outer connecting end, and an upper elastic connecting component is arranged between the upper sliding plate and the valve body.

[0013] Preferably, the sliding plate assembly further comprises 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.

[0014] Preferably, a lower elastic connection component is provided 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.

[0015] Preferably, the pressure member is provided with a convex pin at the outer end of the clamping seat; a bevel block is provided on the inner side of the lower sliding plate toward the dispensing head, and when the lower sliding plate moves downward relative to the upper sliding plate, the inclined surface of the bevel block abuts against the convex pin to guide the sliding block to slide into the closed groove.

[0016] Preferably, a connecting groove extending in a horizontal direction is provided on the sliding plate assembly, and the outer connecting end is slidably arranged in the connecting groove.

[0017] Compared with the prior art, the present invention has the following beneficial effects: This application sets a closing mechanism at the bottom of the valve body, which can form a closed cavity when switching from the working state to the non-working state, and the pressure member pressurizes it to suck back the residual glue at the bottom of the dispensing head. This effectively prevents the residual glue from solidifying or dripping on the outside, keeps the dispensing head clean at all times, ensures that the starting state of each dispensing is consistent, greatly improves the accuracy and quality of dispensing, and provides a more stable and reliable dispensing effect for the box pasting process.

[0018] The problem of glue sticking when the existing glue dispensing device guides the residual glue to flow back is solved. The glue will not stick to the equipment parts, reducing the frequency of equipment failure and shutdown caused by adhesion. At the same time, the closed cavity can isolate external dust and impurities, prevent glue contamination and clogging, extend the service life of the glue dispensing device, and ensure long-term stable operation of the equipment.

[0019] And by controlling the flow of glue and sucking back the residual glue, glue waste is reduced and the cost of raw materials is reduced. On the other hand, equipment failures and maintenance requirements are reduced, and maintenance costs and production interruption time caused by maintenance are reduced. Moreover, in assembly line production, the dispensing device can quickly switch states and work continuously and stably, which significantly improves production efficiency and enhances the economic benefits of the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a stereoscopic diagram of a glue dispensing device of a fully automatic folder gluer according to the present invention at a first viewing angle.

[0021] Figure 2 It is a stereoscopic diagram of a glue dispensing device of a fully automatic folder gluer according to the present invention under a second viewing angle.

[0022] Figure 3 It is a cross-sectional view of a glue dispensing device of a fully automatic folder gluer of the present invention.

[0023] Figure 4 It is a stereoscopic diagram of a sealing mechanism in a glue dispensing device of a fully automatic folder gluer of the present invention.

[0024] Figure 5 It is a partial three-dimensional exploded view of a sealing mechanism in a glue dispensing device of a fully automatic folder gluer of the present invention.

[0025] Figure 6 The present invention is a three-dimensional diagram of a clamping seat in a glue dispensing device of a fully automatic folder gluer when clamping a glue dispensing head.

[0026] Figure 7 yes Figure 6 A partial enlarged view of point A.

[0027] Figure 8 It is a schematic diagram of a clamping seat in a glue dispensing device of a fully automatic folder gluer of the present invention when a glue dispensing head is released.

[0028] Fig. 9 It is a three-dimensional diagram of a clamping seat in a glue dispensing device of a fully automatic folder gluer of the present invention when a glue dispensing head is released.

[0029] Fig.10 yes Fig. 9 A partial enlarged view of point B.

[0030] The numbers 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; 441 1. Side ears; 4412. Upper side plate; 4413. Connecting groove; 442. Lower sliding plate; 4421. Lower side plate; 4422. Oblique 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. Pressure piece; 51. Sliding block; 511. Protruding pin; 512. Raised strip; 513. Protruding seat; 52. Elastic reset element. DETAILED DESCRIPTION

[0031] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0032] like Figures 1 to 10 As shown, the present application provides a dispensing device for a fully automatic folder gluer, comprising a connecting frame 1, a driving cylinder 2 arranged at the top of the connecting frame 1, and a valve body 3 arranged at the bottom of the connecting frame 1, an upper chamber 31 and a lower chamber 32 are arranged in the valve body 3, a conducting port is arranged between the upper chamber 31 and the lower chamber 32, a valve core 33 capable of connecting the upper chamber 31 and the lower chamber 32 when sliding is arranged at the conducting port, and a working rod 21 of the driving cylinder 2 extends into the valve body 3 and is connected to the valve core 33; The valve body 3 is also provided with a feed connector 34 connected to the upper chamber 31, and the bottom end of the valve body 3 is provided with a glue dispensing head 35 connected to the lower chamber 32; when the valve core 33 moves downward, the glue liquid passes through the upper chamber 31 and the lower chamber 32 from the feed connector 34 and is sprayed outward through the glue dispensing head 35; the bottom of the glue dispensing head 35 is provided with a closing mechanism 4 which forms a closed cavity at the bottom of the glue dispensing head 35 in a non-working state and can open the closed cavity to expose the bottom of the glue dispensing head 35 in a working state, and a pressurizing member 5 is also provided in the closed cavity for pressurizing the closed cavity when the glue dispensing head 35 changes from a working state to a non-working state.

[0033] The dispensing device is mainly composed of a connecting frame 1, a driving cylinder 2 and a valve body 3. The connecting frame 1 is the supporting structure of the entire device, which plays a role in stabilizing and connecting various components. The driving cylinder 2 is installed at the top of the connecting frame 1. It is the power source of the entire device and provides driving force for the operation of the device. The valve body 3 is set at the bottom of the connecting frame 1 and is the core working component of the dispensing device.

[0034] The interior of the valve body 3 is divided into two parts, an upper chamber 31 and a lower chamber 32, which are connected to each other through a conducting port. A slidable valve core 33 is installed at the conducting port. The valve core 33 can achieve the connection or isolation of the upper chamber 31 and the lower chamber 32 during the sliding process, thereby controlling the flow of the glue. The working rod 21 of the drive cylinder 2 extends downward into the interior of the valve body 3 and is connected to the valve core 33. When the drive cylinder 2 is working, the telescopic movement of the working rod 21 can drive the valve core 33 to slide at the conducting port.

[0035] The valve body 3 is also provided with a feed connector 34, which is connected to the upper chamber 31 and is the entrance for the glue liquid to enter the glue dispensing device. At the bottom end of the valve body 3, a glue dispensing head 35 connected to the lower chamber 32 is provided, and the glue liquid is finally accurately sprayed to the position where glue dispensing is required through the glue dispensing head 35.

[0036] When the dispensing device is in working state, the driving cylinder 2 pushes the working rod 21 to move 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 conducting port, and the glue enters the upper chamber 31 from the feed connector 34, then flows into the lower chamber 32 through the conducting port, and finally is sprayed out through the dispensing head 35 to complete the dispensing operation.

[0037] In order to solve the problem of glue sticking when the existing glue dispensing device guides the residual glue to flow back into the glue dispensing head 35, the glue dispensing device is provided with a set of sealing mechanism 4 at the bottom of the glue dispensing head 35. When the glue dispensing device changes from the working state to the non-working state, the sealing mechanism 4 forms a closed cavity at the bottom of the glue dispensing head 35. This closed cavity can effectively isolate the glue dispensing head 35 from the external environment, and prevent the glue from being affected by external factors in the non-working state and solidifying or dripping.

[0038] At the same time, a pressurizing member 5 is also provided in the closed cavity. When the dispensing head 35 is changed from the working state to the non-working state and the closed cavity is formed, the pressurizing member 5 will pressurize the closed cavity. Under the action of pressure, the glue liquid remaining at the bottom of the dispensing head 35 will be sucked back into the dispensing head 35, avoiding the occurrence of adhesion problems caused by the glue liquid remaining 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 closing mechanism 4 will open the closed cavity to expose the bottom of the dispensing head 35 for the next dispensing operation.

[0039] like Figure 4 , Figure 5 , Figure 8 and Fig. 9As shown, the closing mechanism 4 includes a stand 41, a transmission rod group, a clamping seat 43 and a sliding plate group; there are two stand 41, the two stand 41 are symmetrically arranged at the bottom end of the valve body 3 relative to the dispensing head 35, and the two stand 41 extend downward; the transmission rod group is rotatably arranged on the stand 41, and the transmission rod group has an inner connecting end close to the dispensing head 35 and an outer connecting end away from the dispensing head 35; there are two clamping seats 43, the two clamping seats 43 are symmetrically arranged at both ends of the valve body 3 relative to the dispensing head 35, and the opposite ends of the two clamping seats 43 are provided with a clamping end that can be connected with the dispensing head 35. The groove 431 of the outer wall of the valve body 3 is matched, and the bottom end of the groove 431 is formed with a closed groove 432. When the two clamping seats 43 abut against each other, the closed grooves 432 of the two clamping seats 43 form a closed cavity, and the clamping seats 43 are rotatably connected with the adjacent inner connecting ends; the sliding plate group is arranged at the bottom of the valve body 3 in a longitudinal sliding manner, and the sliding plate is rotatably connected with the outer connecting 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.

[0040] There are also two clamping seats 43, which are distributed in the same way as the stand 41. They are also symmetrically centered on the glue 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 glue dispensing head 35, a groove 431 that can fit tightly with the outer wall of the glue dispensing head 35 is provided. A closed groove 432 is further formed at the bottom end of the groove 431. When the two clamping seats 43 abut against each other during movement, the two closed grooves 432 will dock and together form a closed cavity. The formation of this closed cavity can effectively isolate the glue 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 connecting end in the adjacent transmission rod group, so that the clamping seat 43 can achieve flexible opening and closing actions under the drive of the transmission rod group.

[0041] The sliding plate group is slidably arranged at the bottom of the valve body 3 along the longitudinal direction. The sliding plates in the sliding plate group are connected to the outer connecting end of the transmission rod group by 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 folder gluer, the sliding plate group will be driven by the cardboard and move upward relative to the glue dispensing head 35. In the process of the sliding plate group moving upward, it drives the transmission rod group to rotate through the rotational connection relationship with the outer connecting end of the transmission rod group. The rotation of the transmission rod group further drives the two clamping seats 43 connected thereto to move, so that the two clamping seats 43 are separated from each other, thereby exposing the bottom end of the glue dispensing head 35 and preparing for the glue dispensing operation. When the cardboard is completely out of the glue dispensing range of the glue dispensing head 35, the sliding plate group moves downward, and drives the two clamping seats 43 to approach each other and clamp the glue 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 to achieve closed protection of the glue dispensing head 35.

[0042] like Figure 5 As 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 rotatably connected to the upper part of the clamping seat 43, and the other end of the upper connecting rod 421 is rotatably connected to the standing seat 41; one end of the lower connecting rod 422 is rotatably connected to the lower part of the clamping seat 43, and the other end of the lower connecting rod 422 is rotatably connected to the sliding plate group, and a connecting pin 423 rotatably connected to the standing seat 41 is provided on the lower connecting rod 422, and a transmission section is formed between the connecting pin 423 and the connecting 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 connecting end of the lower connecting rod 422 and the sliding plate group, and the transmission section is parallel to the upper connecting rod 421 and has the same length.

[0043] When the sliding plate group moves upward due to external factors such as the passage of cardboard, it will drive the driving section of the lower connecting rod 422 to deflect upward. Since the transmission section is parallel to the upper connecting rod 421 and has the same length, the transmission section of the lower connecting rod 422 will cooperate with the upper connecting rod 421. This cooperation allows the upper connecting rod 421 and the lower connecting rod 422 to rotate around their respective connection points with the stand 41, thereby driving the clamping seat 43 to move. Finally, the clamping seat 43 is separated 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, thereby achieving closed protection for the dispensing head 35.

[0044] like Figure 5 , Figure 7 and Fig.10As shown, 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 the elastic force of the lower elastic connection component, and the ends of the upper connecting rod 421 and the lower connecting rod 422 are both connected to the upper sliding plate 441 to rotate toward the inner side of the dispensing head 35; the clamping seat 4 3 is provided with a sliding block 51 which slides transversely through the closed groove 432. When the two clamping seats 43 abut against each other to clamp the dispensing head 35, the sliding block 51 slides to form the pressure member 5. The pressure member 5 is provided with a convex pin 511 at the outer end of the clamping seat 43. The lower sliding plate 442 is provided with an inclined block 4422 on the inner side 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 against the convex pin 511 to guide the sliding block 51 to slide into the closed groove 432.

[0045] When a cardboard passes through the bottom of the lower sliding plate 442, the elastic force of the upper elastic connection assembly is greater than the elastic force of the lower elastic connection assembly, so that the lower sliding plate 442 first overcomes the elastic force of the lower elastic connection seat assembly and moves upward. When 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 assembly, the upper sliding plate 441 moves upward to drive the clamping seat 43 to separate through the lower connecting rod 422.

[0046] When the glue-dispensing cardboard is far away from the glue-dispensing range of the glue-dispensing head 35, the bottom of the lower sliding plate 442 is unsupported, and because the elastic force of the upper elastic connection component is greater than the elastic force of the lower elastic connection component, the upper sliding plate 441 is reset under the action of the upper elastic connection member, and guides the clamping seat 43 to clamp the glue-dispensing head 35 and form a closed cavity at the bottom of the glue-dispensing head 35. The lower sliding plate 442 is reset under the action of the lower elastic connection member, and the inclined surface of the inclined block 4422 installed on the inner side of the lower sliding plate 442 can abut against 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 is reduced, and then the pressure is increased. The glue remaining at the bottom of the glue-dispensing head 35 will flow back into the glue-dispensing head 35 under the action of pressure, so as to prevent the glue from remaining at the bottom of the glue-dispensing head 35 and blocking the glue-dispensing head 35.

[0047] like Figure 7 and Fig.10 As shown, a convex strip 512 extending upward is provided at one end of the sliding block 51 located in the closed groove 432 , a convex seat 513 is provided on the outer side of the clamping seat 43 of the sliding block 51 , and an elastic reset element 52 is provided between the convex seat 513 and the clamping seat 43 .

[0048] When the lower sliding plate 442 moves upward relative to the upper sliding plate 441, the sliding block 51 can move relative to the closed groove 432 toward the outside of the clamping seat 43 under the action of the elastic reset element 52. This facilitates the sliding block 51 to slide into the closed cavity to pressurize the clamping seat 43 when it abuts against the clamping seat 43 next time. The convex strip 512 and the convex seat 513 can prevent the sliding block 51 from detaching from the clamping seat 43, thereby limiting the sliding block 51.

[0049] like Figure 4 As shown, a roller 47 is disposed at the bottom end of the sliding plate group. When a cardboard passes by the bottom of the dispensing head 35, the roller 47 rolls on the top of the cardboard and moves upward relative to the valve seat.

[0050] When the dispensing head 35 is in a non-working state, the bottom end of the roller 47 is lower than the upper surface of the cardboard. When the cardboard passes by, the edge of the cardboard can first abut against the surface of the roller 47 and then roll down to the upper stage, so that the upper sliding frame and the lower sliding member can move upward to form a closed cavity and a closed groove 432.

[0051] like Figure 4 As shown, a cross seat 411 is provided at the top of the vertical seat 41, a side ear 4411 is provided on the upper sliding plate 441, and the upper elastic connection component 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 cross seat 411, and the upper positioning rods 451 slide through the side ear 4411; the upper spring 452 is sleeved on the upper positioning rod 451, and the upper spring 452 is located between the cross seat 411 and the upper sliding plate 441; the upper positioning ring 453 is arranged on the lower positioning rod 461 and is located at the bottom end of the side ear 4411.

[0052] Under the action of the upper positioning rod 451, the upper sliding plate 441 can be stably raised and lowered in the longitudinal direction 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 when there is no pressure at the bottom of the upper sliding plate 441, the upper sliding plate 441 is quickly guided to move downward, thereby achieving the clamping of the dispensing head 35 by the clamping seat 43, and the upper positioning ring 453 can prevent the upper sliding plate 441 from detaching from the upper positioning rod 451.

[0053] like Figure 4As shown, an upper side plate 4412 is also provided on the upper sliding plate 441, and a lower side plate 4421 is also provided on the lower sliding plate 442, and the lower elastic connection component 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 slides through the upper side plate 4412; the lower spring 462 is sleeved on the lower positioning rod 461, and 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 arranged on the upper positioning rod 451 and is located at the top end of the upper side plate 4412.

[0054] Under the action of the lower limit rod, the lower sliding plate 442 can stably rise and fall 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. This makes the reset time of the upper sliding plate 441 much shorter than the complete reset time of the lower sliding plate 442, so that 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, and the lower positioning ring 463 can effectively prevent the lower sliding plate 442 from detaching from the lower positioning rod 461.

[0055] like Figure 4 As shown, a connecting groove 4413 extending in the horizontal direction is provided on the upper sliding plate 441 , and 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 disposed in the connecting groove 4413 .

[0056] When the upper sliding plate 441 moves upward, since the end of the lower connecting rod 422 is provided with a sliding rod 424, and the sliding rod 424 deflects with 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 it deflects. This allows the lifting force of the upper sliding plate 441 to be transmitted to the lower connecting rod 422, so as to be converted into the deflection force of the lower connecting rod 422.

[0057] like Figure 7 As shown, an outer connecting column is provided at one end of the boss 513 facing the clamping seat 43, and an inner connecting column is provided at one end of the clamping seat 43 facing the boss 513. Both ends of the elastic reset element 52 are respectively interference fit with the outer connecting column and the inner connecting column.

[0058] By respectively making interference fit between the two ends of the elastic reset element 52 and the outer connecting column and the inner connecting column, the elastic reset element 52 can be effectively prevented from deviating between the clamping seat 43 and the convex seat 513, thereby improving the structural stability.

[0059] The above embodiments only express one or several implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the attached claims.

Claims

1. A glue dispensing device for a fully automatic folder gluer, comprising: A valve body (3) and a glue dispensing head (35) arranged at the bottom of the valve body (3); characterized in that a sealing mechanism (4) is arranged at the bottom of the glue dispensing head (35); In a non-working state, the closing mechanism (4) is closed to form a closed cavity at the bottom of the glue dispensing head (35); in a working state, the closing mechanism (4) is opened to expose the glue dispensing head (35); A pressurizing member (5) is arranged in the closed cavity for pressurizing the closed cavity.

2. The glue dispensing device of the fully automatic folder-gluing machine according to claim 1, characterized in that: The closing mechanism (4) comprises two clamping seats (43) symmetrically arranged on the outside of the dispensing head (35) and capable of moving toward or away from each other. The two clamping seats (43) are both provided with a groove (431) capable of cooperating with the outer wall of the dispensing head (35). The bottom end of the groove (431) forms a closed groove (432). When the two clamping seats (43) abut against each other, the two closed grooves (432) are closed to form the closed cavity.

3. The glue dispensing device of the fully automatic folder-gluing machine according to claim 2, characterized in that: A sliding block (51) is provided on the clamping seat (43) and slides transversely through the closed groove (432). When the two clamping seats (43) are in contact with each other to clamp the dispensing head (35), the sliding block (51) slides radially along the dispensing head (35) to form the pressure member (5).

4. The glue dispensing device of the fully automatic folder-gluing machine according to claim 3, characterized in that: A convex strip (512) extending upward is provided at one end of the sliding block (51) located in the closed groove (432), a convex seat (513) is provided on the outer side of the clamping seat (43) of the sliding block (51), and an elastic reset element (52) is provided between the convex seat (513) and the clamping seat (43).

5. A glue dispensing device for a fully automatic folder-gluing machine according to any one of claims 2 to 4, characterized in that: The sealing mechanism (4) further comprises a transmission rod group, which is rotatably arranged at the bottom of the valve body (3), and has an inner connecting end close to the glue dispensing head (35) and an outer connecting end away from the glue dispensing head (35); the inner connecting end is rotatably connected to the clamping seat (43), and the outer connecting end drives the clamping seat (43) to clamp the glue dispensing head when it is deflected.

6. The glue dispensing device of the fully automatic folder-gluing machine according to claim 5, characterized in that: The closing mechanism (4) further comprises a sliding plate group; the sliding plate group comprises an upper sliding plate (441) connected to the outer connection end, and an upper elastic connection component is provided between the upper sliding plate (441) and the valve body (3).

7. The glue dispensing device of the fully automatic folder-gluing machine according to claim 6, characterized in that: The sliding plate assembly further comprises a lower sliding plate (442) drivingly connected to the sliding block (51); when the lower sliding plate (442) slides relative to the upper sliding plate (441), the sliding block (51) presses the closed cavity.

8. The glue dispensing device of the fully automatic folder-gluing machine according to claim 7, characterized in that: A lower elastic connection component is provided between the lower sliding plate (442) and the upper sliding plate (441), and the elastic force of the upper elastic connection component is greater than the elastic force of the lower elastic connection component.

9. The glue dispensing device of the fully automatic folder-gluing machine according to claim 7, characterized in that: The pressure member (5) is provided with a convex pin (511) at the outer end of the clamping seat (43); the lower sliding plate (442) is provided with an inclined block (4422) on the inner side 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 against the convex pin (511) to guide the sliding block (51) to slide into the closed groove (432).

10. The glue dispensing device of the fully automatic folder-gluing machine according to claim 6, characterized in that: A connecting groove (4413) extending in the horizontal direction is provided on the sliding plate assembly, and the outer connecting end is slidably arranged in the connecting groove (4413).

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