Gluing device of plywood gluing machine

Abstract

The invention provides a gluing device of a plywood gluing machine, and belongs to the technical field of plywood production equipment.The gluing device comprises a glue storage barrel, a transverse pipe, a glue pumping pipeline and a glue returning pipeline, and a glue feeding cavity and a backflow cavity which are independent of each other are formed in the transverse pipe; wherein the transverse pipe is provided with a glue feeding cavity and a backflow cavity, the transverse pipe is provided with a plurality of glue outlet pipes which are distributed in the length direction and horizontally arranged, the glue outlet pipes are communicated with the glue feeding cavity, the transverse pipe is provided with a plurality of glue pumping pipes which are distributed in the length direction and vertically arranged, and the glue pumping pipes are communicated with the backflow cavity. In the using process, the glue feeding cavity conveys glue to a glue roller kerf of the gluing machine through the glue outlet pipe, and the backflow cavity extracts glue in the glue roller kerf through the glue extraction pipe and conveys the glue back to the glue storage barrel, so that the glue in the glue roller kerf is always in a circulating state, and glue precipitation or solidification caused by short-time shutdown maintenance of equipment is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of plywood production equipment, and in particular relates to a gluing device for a plywood gluing machine. Background Art

[0002] Plywood is a three-layer or multi-layer board material made by peeling wood segments into veneers or planing wood blocks into thin wood, and then gluing them with adhesive. Plywood is mainly coated with glue by a glue coating machine, which utilizes two sets of glue coating rollers arranged up and down. The glue is stored in the slit formed between the two glue coating rollers. Through the rotation of the glue coating rollers, the glue is evenly attached to the surface of the glue coating rollers, and then the glue is coated on the surface of the veneer by the glue coating rollers.

[0003] At present, when adding glue, the gluing device of the glue coating machine directly transports the glue to the slit between the two glue coating rollers in each group, and can only transport the glue but cannot circulate the glue in the slit. When the equipment stops, the glue stored in the slit is prone to precipitation without flowing, resulting in uneven gluing of the veneer. If the shutdown time is long, it may even solidify, increasing the workload of equipment maintenance. Summary of the invention

[0004] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a gluing device for a plywood gluing machine, which at least partially solves the above problem.

[0005] The technical solution adopted by the present invention is as follows: The present invention proposes a gluing device for a plywood gluing machine, comprising: Glue storage barrel, which is equipped with glue pumping pipeline and glue return pipeline; A horizontal tube is arranged parallel to the glue coating roller, wherein a glue delivery cavity and a return cavity are arranged independently of each other, the glue pump pipeline is connected to the glue delivery cavity, and the glue return pipeline is connected to the return cavity; The horizontal tube is provided with a plurality of glue outlet pipes distributed along the length direction and arranged horizontally, the glue outlet pipes are connected with the glue delivery cavity and are used to transport glue, and the horizontal tube is provided with a plurality of glue extraction pipes distributed along the length direction and arranged vertically, the glue extraction pipes are connected with the reflux cavity and are used to extract glue, so that the glue in the glue coating machine forms an external circulation; The transverse tube is also provided with a first flipping mechanism for controlling the opening and closing of the glue outlet pipe and a second flipping mechanism for controlling the opening and closing of the glue extraction pipe.

[0006] Furthermore, the first flipping mechanism includes a first motor and two symmetrically arranged first baffles, the two first baffles are arranged in the glue delivery cavity and fit with the inner wall of the glue delivery cavity, the two first baffles are connected to the output shaft of the first motor and are driven to rotate by the first motor.

[0007] Furthermore, one end of the transverse tube is provided with a first connecting tube which is in communication with the glue delivery cavity and is coaxially arranged, the first motor is arranged on the first connecting tube, and the output shaft of the first motor extends from the first connecting tube into the glue delivery cavity.

[0008] Furthermore, the second flipping mechanism includes a second motor and a second baffle, the second baffle is arranged in the reflux chamber and fits against the inner wall of the reflux chamber, the second baffle is connected to the output shaft of the second motor and is driven to rotate by the second motor.

[0009] Furthermore, a second connecting tube which is in communication with the reflux chamber and is coaxially arranged is provided at one end of the transverse tube, the second motor is arranged on the second connecting tube, and the output shaft of the second motor extends from the second connecting tube into the reflux chamber.

[0010] Furthermore, the glue pumping pipeline includes a glue delivery pipe and a delivery pump, the delivery pump is connected in series to the glue delivery pipe, one end of the glue delivery pipe is connected to the glue storage barrel, and the other end of the glue delivery pipe is connected to the first connecting pipe.

[0011] Furthermore, the rubber return pipeline includes a rubber return pipe and a reflux pump, the reflux pump is connected in series to the rubber return pipe, one end of the rubber return pipe is connected to the rubber storage barrel, and the other end of the rubber return pipe is connected to the second connecting pipe.

[0012] Furthermore, a circulation pipe is provided at one end of the horizontal tube, and both ends of the circulation pipe are respectively connected to the glue delivery chamber and the reflux chamber. A valve is provided on the circulation pipe. When the first flip mechanism and the second flip mechanism are closed and the valve is opened, the glue in the glue delivery chamber and the reflux chamber can form an internal circulation.

[0013] Furthermore, a heating chamber is provided in the transverse tube along the length direction, and a heating wire for heating is provided in the heating chamber. The heating wire is laid along the length direction of the transverse tube, and the length of the heating wire is the same as the length of the glue delivery chamber and the reflux chamber.

[0014] Furthermore, a plurality of air outlet holes are provided on both sides of the transverse tube along the length direction, the air outlet holes are connected to the heating chamber, an air connecting pipe is provided at one end of the transverse tube, one end of the air connecting pipe is connected to the heating chamber, and the other end of the air connecting pipe is connected to an external air supply device.

[0015] The beneficial effects achieved by the present invention using the above structure are as follows: 1. By setting a horizontal pipe with a glue delivery chamber and a reflux chamber, during use, the glue delivery chamber is used to deliver glue to the slit of the glue roller of the glue coating machine to achieve gluing to the glue coating machine. At the same time, the reflux chamber is used to extract the glue in the slit of the glue roller, so that the glue in the slit of the glue roller is always in a circulating state, avoiding glue precipitation or solidification caused by short-term shutdown of the equipment for maintenance; 2. By setting a circulation pipe connecting the glue delivery chamber and the reflux chamber at one end of the horizontal pipe and setting a valve on the circulation pipe, when the equipment needs to be shut down for a long time for maintenance, the valve is opened to connect the glue delivery chamber and the reflux chamber. At the same time, the delivery pump on the glue delivery pipe continues to pump, and the reflux pump on the glue return pipe continues to pump, so that the glue in the glue delivery chamber, reflux chamber, glue delivery pipe and glue return pipe forms an internal circulation, and the glue continues to flow, avoiding the glue from solidifying and clogging the pipeline due to long-term non-flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A structural schematic diagram of a gluing device for a plywood gluing machine according to an embodiment of the present invention; Figure 2 A schematic diagram of the position of a transverse tube in a gluing device of a plywood gluing machine in an embodiment of the present invention within a gluing roller cut; Figure 3 A schematic diagram of the internal structure of a horizontal tube in a gluing device of a plywood gluing machine according to an embodiment of the present invention; Figure 4 A schematic diagram of the cross-sectional structure of a horizontal tube in a gluing device of a plywood gluing machine proposed in an embodiment of the present invention; Figure 5 A schematic structural diagram of a first turning mechanism in a gluing device for a plywood gluing machine according to an embodiment of the present invention; Figure 6 A schematic diagram of the structure of a second turning mechanism in a gluing device of a plywood gluing machine proposed in an embodiment of the present invention; Figure 7 This is a schematic diagram of a first turning mechanism and a second turning mechanism in a gluing device of a plywood gluing machine in a closed state provided by an embodiment of the present invention.

[0017] Among them, 100, glue storage barrel; 1, horizontal pipe; 11, glue outlet pipe; 12, glue extraction pipe; 13, first connecting pipe; 14, second connecting pipe; 15, air connecting pipe; 101, glue delivery chamber; 102, reflux chamber; 103, heating chamber; 104, air outlet; 2, glue delivery pipe; 21, delivery pump; 3, glue return pipe; 31, reflux pump; 4, first motor; 41, first baffle; 5, second motor; 51, second baffle; 6, circulation pipe; 61, valve; 7, heating wire.

[0018] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0020] In the description of the present invention, it should be understood that terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “top”, “bottom”, “inside” and “outside” indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0021] like Figure 1 As shown, the present invention proposes a gluing device for a plywood gluing machine, comprising a glue storage barrel 100, a horizontal pipe 1, a glue pumping pipeline and a glue return pipeline.

[0022] The glue storage barrel 100 is separately arranged at one side of the glue coating machine for storing glue, and the horizontal pipe 1 is arranged in the slit of the glue roller of the glue coating machine and is arranged parallel to the direction of the glue coating roller (such as Figure 2 shown); One end of the glue pumping pipeline is connected to the glue storage barrel 100, and the other end of the glue pumping pipeline is connected to the cross pipe 1 and communicated with the glue delivery chamber 101. The glue stored in the glue storage barrel 100 is pumped into the glue delivery chamber 101 through the glue pumping pipeline. One end of the glue return pipeline is connected to the glue storage barrel 100, and the other end of the glue return pipeline is connected to the cross pipe 1 and communicated with the reflux chamber 102. The glue in the reflux chamber 102 is pumped back into the glue storage barrel 100 through the glue return pipeline, and a negative pressure is formed in the reflux chamber 102.

[0023] Combination Figure 1 , Figure 3 and Figure 4 As shown, the horizontal tube 1 is provided with a plurality of glue outlet pipes 11 distributed along the length direction and arranged horizontally, and the glue outlet pipes 11 are connected with the glue delivery chamber 101. When the glue pumping pipeline pumps the glue stored in the glue storage barrel 100 into the glue delivery chamber 101, the internal pressure of the glue delivery chamber 101 increases, so that the glue in the glue delivery chamber 101 can be output to the slit of the glue roller of the glue coating machine through the glue outlet pipes 11, and the glue coating of the glue coating machine is completed; The horizontal tube 1 is provided with a plurality of glue extraction hoses 12 distributed along the length direction and arranged vertically. The glue extraction hoses 12 are connected with the reflux chamber 102. Under the suction of the return glue pipeline, a negative pressure is formed inside the reflux chamber 102. Under the action of the negative pressure, the glue extraction hoses 12 can extract the glue in the slit of the rubber roller, so that the glue in the slit of the rubber roller of the glue coating machine forms an external circulation.

[0024] In this way, during use, the glue outlet pipe 11 is used to deliver glue to the rubber roller slit of the glue coating machine, and the glue extraction pipe 12 is used to extract the glue in the rubber roller slit, so that the glue in the rubber roller slit is always in a circulating state, avoiding the precipitation or solidification of glue caused by short-term shutdown of the equipment for maintenance; At the same time, when there is too much glue in the slit of the rubber roller, the excess glue can be pumped back into the glue storage barrel 100 by increasing the amount of glue pumped through the glue return pipeline to avoid glue overflow.

[0025] It should be understood that in the initial stage of starting the machine, a certain amount of glue is first delivered to the slit of the rubber roller to meet the adhesion requirements of the rubber roller, and then the return glue pipeline is opened to extract glue, and the glue delivery capacity is the sum of the amount of glue used by the glue coating machine and the amount of glue extracted, so that the glue reserves in the slit of the rubber roller are in a balanced state, while meeting the glue coating amount, avoiding excessive glue overflow and keeping the glue in a circulating state at all times.

[0026] Combination Figure 4 and Figure 7 As shown, the first flip mechanism and the second flip mechanism on the horizontal pipe 1 are used to control the opening and closing of the rubber outlet pipe 11 and the rubber extraction pipe 12 respectively; A circulation pipe 6 is provided at one end of the horizontal pipe 1, and the two ends of the circulation pipe 6 are respectively connected to the glue delivery chamber 101 and the reflux chamber 102. A valve 61 is provided on the circulation pipe 6. When the glue is delivered to the glue coating machine, the valve 61 is in a closed state, and the glue delivery chamber 101 and the reflux chamber 102 are not connected to each other. When the equipment needs to be shut down for a long time for maintenance, the first flip mechanism and the second flip mechanism are all closed. At this time, the glue delivery pipe 11 and the glue extraction pipe 12 are both in a closed state, and then the valve 61 is opened to connect the glue delivery chamber 101 and the return chamber 102. At the same time, the glue pumping pipeline continues to pump and the glue return pipeline continues to pump, so that the glue in the glue delivery chamber 101, the return chamber 102, the glue pumping pipeline and the glue return pipeline forms an internal circulation (such as Figure 3 As shown), the glue keeps flowing to prevent the glue from solidifying and clogging the pipeline due to long-term non-flow.

[0027] Combination Figure 5As shown, the first flip mechanism includes a first motor 4 and two symmetrically arranged first baffles 41, the two first baffles 41 are arranged in the glue feeding cavity 101, and the first baffles 41 are arranged in an arc shape that fits the inner wall of the glue feeding cavity 101, so that the first baffles 41 can fit the inner wall of the glue feeding cavity 101, and the two first baffles 41 are connected to the output shaft of the first motor 4 and driven to rotate by the first motor 4; When the first baffle 41 rotates to the position where the glue outlet pipe 11 is connected to the glue delivery cavity 101 (such as Figure 7 As shown in FIG. 1 ), the first baffle 41 closes the end of the glue outlet pipe 11 so that the glue outlet pipe 11 is not connected to the glue delivery cavity 101 , thereby closing the glue outlet pipe 11 .

[0028] Combination Figure 6 As shown, the second flip mechanism includes a second motor 5 and a second baffle 51, the second baffle 51 is arranged in the reflux chamber 102, and the second baffle 51 is arranged in an arc shape that fits the inner wall of the reflux chamber 102, so that the second baffle 51 can fit the inner wall of the reflux chamber 102, and the second baffle 51 is connected to the output shaft of the second motor 5, and is driven to rotate by the second motor 5; When the second baffle 51 rotates to the position where the glue extraction tube 12 is connected to the reflux chamber 102 (such as Figure 7 As shown in the figure, the second baffle 51 closes the end of the glue extraction tube 12, so that the glue extraction tube 12 is not connected to the reflux chamber 102, thereby closing the glue extraction tube 12.

[0029] In a specific embodiment, a first connecting tube 13 is provided at one end of the transverse tube 1 and is connected to the glue delivery cavity 101 and coaxially arranged. The first motor 4 is arranged on the first connecting tube 13. The output shaft of the first motor 4 extends from the first connecting tube 13 to the glue delivery cavity 101. The axial length of the glue delivery cavity 101 is extended by the first connecting tube 13. While meeting the installation requirements of the first motor 4, installation space is provided for the glue pump pipeline.

[0030] In a specific embodiment, a second connecting tube 14 is provided at one end of the transverse tube 1, which is connected to the reflux chamber 102 and coaxially arranged. The second motor 5 is arranged on the second connecting tube 14. The output shaft of the second motor 5 extends from the second connecting tube 14 to the reflux chamber 102. The axial length of the reflux chamber 102 is extended by the second connecting tube 14, thereby providing an installation space for the return rubber pipeline while meeting the installation requirements of the second motor 5.

[0031] In an optional embodiment, both the first motor 4 and the second motor 5 are stepper motors, and their rotation angles can be controlled, so that the rotation angles of the first baffle 41 and the second connecting tube 14 can be accurately controlled.

[0032] Combination Figure 1As shown, the glue pump pipeline includes a glue delivery pipe 2 and a delivery pump 21, the delivery pump 21 is connected in series to the glue delivery pipe 2, one end of the glue delivery pipe 2 is connected to the glue storage barrel 100, and the other end of the glue delivery pipe 2 is connected to the first connecting pipe 13. Under the action of the delivery pump 21, the glue in the glue storage barrel 100 is delivered to the glue delivery cavity 101 through the glue delivery pipe 2 and the first connecting pipe 13 in sequence; The rubber return pipeline includes a rubber return pipe 3 and a reflux pump 31. The reflux pump 31 is connected in series to the rubber return pipe 3. One end of the rubber return pipe 3 is connected to the glue storage barrel 100. The other end of the rubber return pipe 3 is connected to the second connecting pipe 14. Under the action of the reflux pump 31, the glue in the reflux chamber 102 is transported to the glue storage barrel 100 through the second connecting pipe 14 and the rubber return pipe 3 in sequence.

[0033] Combination Figure 3 and Figure 4 As shown, a heating chamber 103 is provided in the transverse tube 1 along the length direction, and a heating wire 7 for heating is provided in the heating chamber 103. When the temperature is low, the heating wire 7 in the heating chamber 103 is used to generate heat to increase the temperature in the glue delivery chamber 101 and the reflux chamber 102. By controlling the power of the heating wire 7, the temperature is kept at room temperature or a temperature suitable for the glue, thereby maintaining the fluidity of the glue and avoiding insufficient glue coating and uneven coating caused by low temperature.

[0034] Furthermore, the heating wire 7 is laid along the length direction of the horizontal tube 1, and the length of the heating wire 7 is the same as the length of the glue feeding cavity 101 and the reflux cavity 102, so that the heating wire 7 can cover the entire length of the glue feeding cavity 101 and the reflux cavity 102, thereby improving the heating effect.

[0035] Combination Figure 1 As shown, a plurality of air outlet holes 104 are provided on both sides of the transverse tube 1 along the length direction, and the air outlet holes 104 are connected to the heating chamber 103. An air connecting pipe 15 is provided at one end of the transverse tube 1, and one end of the air connecting pipe 15 is connected to the heating chamber 103, and the other end of the air connecting pipe 15 is connected to an external air supply device. The air supply device transports air into the heating chamber 103 through the air connecting pipe 15. After the air is heated by the electric heating wire 7, it is blown out from the air outlet holes 104 and blown to the surface of the glue coating roller to heat the surface of the glue coating roller, thereby maintaining the fluidity of the glue on the surface of the glue coating roller and avoiding insufficient glue coating and uneven coating caused by low temperature.

[0036] The working principle of the present invention is as follows: under the action of the delivery pump 21, the glue in the glue storage barrel 100 is delivered to the glue delivery chamber 101 through the glue delivery pipe 2 and the first connecting pipe 13 in turn, and the internal pressure of the glue delivery chamber 101 increases, so that the glue in the glue delivery chamber 101 can be output to the rubber roller slit of the glue coating machine through the glue outlet pipe 11, and the glue coating of the glue coating machine is completed. In the initial stage of starting the machine, a certain amount of glue is first delivered to the rubber roller slit, so that the glue in the rubber roller slit forms a certain reserve to meet the demand for rubber roller attachment, and then the reflux pump 31 is turned on. Under the suction action of the reflux pump 31, the glue extraction pipe 12 can extract the glue in the rubber roller slit, and reflux it to the glue storage barrel 100 through the reflux chamber 102, the second connecting pipe 14, and the return glue pipe 3 in turn, so that the glue in the rubber roller slit of the glue coating machine forms an external circulation, thereby avoiding glue precipitation or solidification caused by short-term shutdown of the equipment for maintenance; When the equipment needs to be shut down for a long time for maintenance, the first flip mechanism and the second flip mechanism are all closed. At this time, the glue delivery pipe 11 and the glue extraction pipe 12 are both in a closed state, and then the valve 61 is opened to connect the glue delivery chamber 101 and the return chamber 102. At the same time, the glue pumping pipeline continues to pump and the glue return pipeline continues to pump, so that the glue in the glue delivery chamber 101, the return chamber 102, the glue pumping pipeline and the glue return pipeline forms an internal circulation (such as Figure 3 As shown), the glue keeps flowing to prevent the glue from solidifying and clogging the pipeline due to long-term non-flow.

[0037] In summary of the above embodiments, by providing the horizontal tube 1 with the glue delivery chamber 101 and the reflux chamber 102, during use, the glue delivery chamber 101 is used to deliver glue to the slit of the rubber roller of the glue coating machine, and the reflux chamber 102 is used to extract the glue in the slit of the rubber roller, so that the glue in the slit of the rubber roller is always in a circulating state, thereby avoiding the precipitation or solidification of glue caused by short-term shutdown of the equipment for maintenance; A circulation pipe 6 is provided at one end of the horizontal pipe 1 to connect the glue delivery chamber 101 and the reflux chamber 102, and a valve 61 is provided on the circulation pipe 6. The valve 61 is opened to connect the glue delivery chamber 101 and the reflux chamber 102. At the same time, the delivery pump 21 on the glue delivery pipe 2 continues to pump, and the reflux pump 31 on the glue return pipe 3 continues to pump, so that the glue in the glue delivery chamber 101, the reflux chamber 102, the glue delivery pipe 2 and the glue return pipe 3 forms an internal circulation (such as Figure 3 As shown), the glue keeps flowing to prevent the glue from solidifying and clogging the pipeline due to long-term non-flow.

[0038] It should be understood that the cross pipe 1, the glue pump pipeline and the glue return pipeline are a group, and each group can supply glue to a pair of glue rollers (such as Figure 2 As shown), there is no limit to the number of the cross pipe 1, the glue pump pipeline and the glue return pipeline of the present invention. According to the number of glue coating roller groups of the glue coating machine, a corresponding number of cross pipes 1, the glue pump pipeline and the glue return pipeline are set.

[0039] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0040] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A gluing device for a plywood gluing machine, characterized in that: include: A glue storage barrel (100), wherein the glue storage barrel (100) is provided with a glue pumping pipeline and a glue return pipeline; A transverse tube (1) is arranged parallel to the glue coating roller, wherein the interior of the transverse tube (1) is provided with mutually independent glue delivery chambers (101) and return chambers (102), the glue pump pipeline is connected to the glue delivery chamber (101), and the glue return pipeline is connected to the return chamber (102); The horizontal tube (1) is provided with a plurality of glue outlet pipes (11) distributed along the length direction and arranged horizontally, the glue outlet pipes (11) are connected to the glue delivery chamber (101) and are used to transport glue, and the horizontal tube (1) is provided with a plurality of glue extraction pipes (12) distributed along the length direction and arranged vertically, the glue extraction pipes (12) are connected to the reflux chamber (102) and are used to extract glue, so that the glue in the glue coating machine forms an external circulation; The transverse tube (1) is also provided with a first flipping mechanism for controlling the opening and closing of the glue outlet tube (11) and a second flipping mechanism for controlling the opening and closing of the glue extraction tube (12).

2. The gluing device for a plywood gluing machine according to claim 1, characterized in that: The first turning mechanism comprises a first motor (4) and two symmetrically arranged first baffles (41); the two first baffles (41) are arranged in the glue delivery cavity (101) and are in contact with the inner wall of the glue delivery cavity (101); the two first baffles (41) are connected to the output shaft of the first motor (4) and are driven to rotate by the first motor (4).

3. The gluing device for plywood gluing machine according to claim 2, characterized in that: One end of the transverse tube (1) is provided with a first connecting tube (13) which is in communication with the glue delivery cavity (101) and is coaxially arranged; the first motor (4) is arranged on the first connecting tube (13); and an output shaft of the first motor (4) extends from the first connecting tube (13) into the glue delivery cavity (101).

4. The gluing device for a plywood gluing machine according to claim 1, characterized in that: The second turning mechanism comprises a second motor (5) and a second baffle (51); the second baffle (51) is arranged in the reflux chamber (102) and is in contact with the inner wall of the reflux chamber (102); the second baffle (51) is connected to the output shaft of the second motor (5) and is driven to rotate by the second motor (5).

5. The gluing device for plywood gluing machine according to claim 4, characterized in that: A second connecting pipe (14) is provided at one end of the transverse pipe (1) and is in communication with the reflux chamber (102) and is coaxially arranged; the second motor (5) is arranged on the second connecting pipe (14); and an output shaft of the second motor (5) extends from the second connecting pipe (14) into the reflux chamber (102).

6. The gluing device for plywood gluing machine according to claim 3, characterized in that: The glue pump pipeline comprises a glue delivery pipe (2) and a delivery pump (21), wherein the delivery pump (21) is connected in series to the glue delivery pipe (2), one end of the glue delivery pipe (2) is connected to the glue storage barrel (100), and the other end of the glue delivery pipe (2) is connected to the first connecting pipe (13).

7. The gluing device for plywood gluing machine according to claim 5, characterized in that: The rubber return pipeline comprises a rubber return pipe (3) and a reflux pump (31), wherein the reflux pump (31) is connected in series to the rubber return pipe (3), one end of the rubber return pipe (3) is connected to the rubber storage barrel (100), and the other end of the rubber return pipe (3) is connected to the second connecting pipe (14).

8. The gluing device for plywood gluing machine according to claim 1, characterized in that: A circulation pipe (6) is provided at one end of the transverse pipe (1), and the two ends of the circulation pipe (6) are respectively connected to the glue delivery chamber (101) and the reflux chamber (102). A valve (61) is provided on the circulation pipe (6), and when the first turning mechanism and the second turning mechanism are closed and the valve (61) is opened, the glue in the glue delivery chamber (101) and the reflux chamber (102) can form an internal circulation.

9. The gluing device for plywood gluing machine according to claim 1, characterized in that: A heating chamber (103) is provided in the transverse tube (1) along the length direction, and a heating wire (7) for heating is provided in the heating chamber (103). The heating wire (7) is laid along the length direction of the transverse tube (1), and the length of the heating wire (7) is the same as the length of the glue delivery chamber (101) and the reflux chamber (102).

10. The gluing device for plywood gluing machine according to claim 9, characterized in that: A plurality of air outlet holes (104) are provided on both sides of the transverse tube (1) along the length direction, the air outlet holes (104) being in communication with the heating chamber (103), an air connection pipe (15) being provided at one end of the transverse tube (1), one end of the air connection pipe (15) being in communication with the heating chamber (103), and the other end of the air connection pipe (15) being connected to an external air supply device.

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