Gluing equipment with glue circulating function

Abstract

The invention discloses gluing equipment with a glue circulation function, and relates to the technical field of gluing equipment, the gluing equipment with the glue circulation function comprises a glue supply part, the glue supply part is connected with a transfer tank body through a first glue supply pipeline, and the transfer tank body is connected with a quantitative cylinder through a second glue supply pipeline; the glue outlet assembly comprises an assembling frame, a glue inlet channel is formed in the assembling frame, the first end of the glue inlet channel is connected with the quantitative cylinder through a glue inlet pipeline, and a first branch and a second branch are arranged at the second end of the glue inlet channel; the inlet end of the first control valve is connected with the first branch, and the outlet end of the first control valve is connected with the gluing pipe; the inlet end of the second control valve is communicated and connected with the second branch, and the outlet end of the second control valve is connected with the transfer tank body through a return pipeline. According to the gluing equipment with the glue circulating function, the technical problem that in the prior art, glue in a glue pipe is dried after gluing of gluing equipment is stopped is solved.

Description

Technical Field

[0001] This invention relates to the field of adhesive coating equipment technology, and in particular to an adhesive coating equipment with adhesive circulation function. Background Technology

[0002] Adhesive coating is used in multiple processes of automobile production. With the increasing refinement and automation of automobile manufacturing processes, adhesive coating technology has evolved from traditional manual coating to high-precision, high-efficiency automated coating. In the high-speed, high-precision coating process, the control of the adhesive has become a key challenge, especially issues such as adhesive dripping, stringing, adhesive breakage, dry adhesive in the tube, and nozzle clogging, which directly affect the coating quality.

[0003] Existing glue application equipment lacks glue circulation functionality. After application stops, the glue in the tube dries out due to prolonged standing, affecting the application quality. Therefore, this paper proposes a glue application device with glue circulation functionality to address the aforementioned problems. Summary of the Invention

[0004] The purpose of this invention is to provide a glue coating device with glue circulation function, which solves the technical problem that existing glue coating devices do not have glue circulation function, and the glue in the glue tube dries out after the coating stops, which affects the coating quality of the glue coating device.

[0005] To achieve the above objectives, the present invention provides a glue application device with glue circulation function, comprising: a device frame, wherein a robotic arm is mounted on the device frame;

[0006] A glue supply component is mounted on the equipment frame. The glue supply component is connected to the transfer tank through a first glue supply pipeline, and the transfer tank is connected to the metering cylinder through a second glue supply pipeline.

[0007] A glue dispensing assembly is mounted on the robotic arm, and the glue dispensing assembly includes:

[0008] An assembly frame is provided with an adhesive inlet channel inside. The first end of the adhesive inlet channel is connected to the metering cylinder through an adhesive inlet pipe, and the second end of the adhesive inlet channel is provided with a first branch and a second branch.

[0009] A first control valve is located on the first side of the assembly frame. The inlet end of the first control valve is connected to the first branch, and the outlet end of the first control valve is connected to the glue application tube.

[0010] The second control valve is located on the second side of the assembly frame. The inlet end of the second control valve is connected to the second branch, and the outlet end of the second control valve is connected to the transfer tank through a return pipeline.

[0011] Preferably, the first control valve includes: a first mounting housing, a first assembly cavity inside the first mounting housing, a first movable valve stem slidably disposed within the first assembly cavity, a first feed channel in the middle portion of the first mounting housing connected to the first branch, a first discharge channel at the second end of the first mounting housing connected to the adhesive applicator tube, wherein when the first movable valve stem moves to its limit position towards the first end of the first mounting housing, the first feed channel and the first discharge channel are not connected, and when the first movable valve stem moves to its limit position towards the second end of the first mounting housing, the first feed channel and the first discharge channel are connected.

[0012] Preferably, an annular protrusion is provided at the second end of the first assembly cavity, and a first through hole is provided at the axial position of the annular protrusion. The annular protrusion divides the second end of the first assembly cavity into a first cavity and a second cavity. The first cavity is connected to the first feed channel, and the second cavity is connected to the first discharge channel. A ball valve is sleeved on the second end of the first movable valve stem. When the outer peripheral side of the ball valve abuts against the inner peripheral side of the first through hole, the first cavity and the second cavity are not connected.

[0013] Preferably, the first end of the first movable valve stem is connected to the first piston block, the first piston block divides the first end of the first assembly cavity into a third cavity and a fourth cavity, the first mounting housing is provided with a first air inlet at a position above the first piston block, the first air inlet is connected to the third cavity, and the first mounting housing is provided with a second air inlet at a position below the first piston block, the second air inlet is connected to the fourth cavity.

[0014] Preferably, the first assembly cavity is provided with an annular groove at a position below the first piston block, and a support spring is provided in the annular groove, with the other end of the support spring connected to the bottom surface of the first piston block.

[0015] Preferably, a sealing gasket is provided on the outer peripheral side of the first piston block, and the outer peripheral side of the sealing gasket is in contact with the inner sidewall of the assembly cavity.

[0016] Preferably, the assembly frame has a mounting plate, and the mounting plate has a glue discharge channel. The first end of the glue discharge channel is connected to the first discharge channel, and the second end of the glue discharge channel is connected to the glue application tube.

[0017] Preferably, a limiting block is provided in the middle part of the first assembly cavity, and a through limiting hole is provided on the top surface of the limiting block, and the limiting hole is slidably connected to the first movable valve stem.

[0018] Preferably, a fixing block is provided at the first end of the first mounting housing, a positioning bolt is provided on the fixing block, and a socket is provided at the second end of the positioning bolt, the socket being slidably connected to the first movable valve stem.

[0019] Preferably, the second control valve includes: a second mounting housing, a second assembly cavity inside the second mounting housing, a second movable valve stem slidably disposed within the second assembly cavity, a second feed channel at the second end of the second mounting housing connected to the second branch, a second discharge channel at the middle portion of the second mounting housing connected to the return pipeline, wherein when the second movable valve stem moves to the first end of the second mounting housing to its limit position, the second feed channel and the second discharge channel are not connected; and when the second movable valve stem moves to the second end of the second mounting housing to its limit position, the second feed channel and the second discharge channel are connected.

[0020] Compared to the aforementioned background technology, the glue coating equipment with glue circulation function provided by the present invention has the following beneficial effects: During glue coating, the first control valve is opened and the second control valve is closed. The glue supply component delivers glue to the transfer tank through the first glue supply pipeline. The metering cylinder meterly delivers the glue in the transfer tank to the first branch of the glue inlet channel through the second glue supply pipeline. The glue is then delivered to the coating pipe through the first branch for coating. After each glue coating is stopped, the first control valve is closed and the second control valve is opened. The metering cylinder meterly delivers the glue in the transfer tank to the second branch of the glue inlet channel through the second glue supply pipeline. The glue is then delivered to the return pipeline through the second branch and returns to the transfer tank through the return pipeline. This circulation of glue in the second glue supply pipeline and the return pipeline effectively prevents the occurrence of dry glue in the second glue supply pipeline and the glue inlet channel, thereby improving the coating quality of the glue coating equipment. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0022] Figure 1 This is a three-dimensional structural diagram of the adhesive coating equipment provided in an embodiment of the present invention;

[0023] Figure 2 This is a three-dimensional structural diagram of the adhesive coating equipment after concealing the protective plate and the metering cylinder, as provided in an embodiment of the present invention.

[0024] Figure 3This is a three-dimensional structural diagram of the glue dispensing assembly provided in an embodiment of the present invention;

[0025] Figure 4 This is a bottom view of the glue dispensing assembly provided in an embodiment of the present invention;

[0026] Figure 5 for Figure 4 Schematic diagram of the cross section at point AA;

[0027] Figure 6 for Figure 4 Schematic diagram of the cross section at point BB;

[0028] Figure 7 for Figure 6 Cross-sectional view at point CC;

[0029] Figure 8 for Figure 6 Schematic diagram of the cross section at point DD;

[0030] Figure 9 for Figure 5 Enlarged view of point E in the middle;

[0031] Figure 10 for Figure 6 Enlarged schematic diagram at point F in the middle.

[0032] Specifically, 1-Equipment frame; 2-Glue supply component; 201-Glue bucket; 202-Glue supply pump; 3-First glue supply pipeline; 4-Transfer tank; 5-Quantitative cylinder; 6-Glue dispensing assembly; 601-Connecting frame; 602-Assembly frame; 603-Glue inlet channel; 6031-First branch; 6032-Second branch; 604-Mounting plate; 6041-Glue discharge channel; 605-Glue hose connector; 7-Glue application hose; 8-First control valve; 801-First mounting housing; 802-First assembly cavity; 803-First moving valve stem; 804-First feeding channel; 805-First discharging channel; 806-Annular protrusion; 807-First through hole; 808 809-First cavity; 8010-Second cavity; 8011-Ball valve; 8012-First piston block; 8013-Third cavity; 8014-Fourth cavity; 8015-Annular groove; 8016-Support spring; 8017-Sealing gasket; 8018-Fixing block; 8019-Positioning bolt; 9010-Insertion hole; 901-Second control valve; 902-Second mounting housing; 903-Second moving valve stem; 904-Second feed channel; 905-Second discharge channel; 906-Third air inlet; 907-Fourth air inlet; 10-Second glue supply pipeline; 11-Return pipeline; 12-Main control cabinet; 13-Cover plate. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] like Figure 1 and Figure 2 As shown, to achieve the above objectives, the present invention provides a glue application device with a glue circulation function, including: a device frame 1 and a glue supply component 2 and a glue dispensing component 6 disposed on the device frame 1. The glue supply component 2 is connected to a transfer tank 4 through a first glue supply pipeline 3. The transfer tank 4 is mainly used for degassing and stirring the glue. By drawing a vacuum, the internal air pressure of the glue is reduced, the air bubbles expand and rise rapidly to the surface and burst, thereby removing air bubbles from the glue and preventing them from affecting the glue's performance, appearance, and subsequent coating quality. The glue is stirred by a stirring paddle to ensure that the various components of the glue are fully mixed and uniform, preventing sedimentation and clumping. At the same time, it can avoid problems such as curing and clogging caused by the glue remaining in the tank for a long time, ensuring the glue's fluidity and performance. The transfer tank 4 is connected to a metering cylinder 5 through a second glue supply pipeline 10. The metering cylinder 5 delivers the glue in the transfer tank 4 to the second glue supply pipeline 10 in a metered manner. In addition, a protective plate 13 is installed around the equipment frame 1. The protective plate 13 is used to protect the glue supply component 2 and the transfer tank 4 and other related structures on the inner side.

[0036] It should be noted that the glue supply component 2 includes a glue tank 201 and a glue supply pump 202 mounted on the equipment frame 1. The glue supply pump 202 is used to transport the glue in the glue tank 201 to the transfer tank 4 through the first glue supply pipeline 3. The glue tank 201 and the glue supply pump 202 are relatively mature existing technologies, so they will not be described in detail.

[0037] like Figures 3 to 8As shown, the dispensing assembly 6 is mounted on a robotic arm (not shown in the figure). The dispensing assembly 6 includes: a connecting frame 601 for connecting the robotic arm, the robotic arm being mounted on the equipment frame 1 for moving the dispensing assembly 6 to a set position; an assembly frame 602 is mounted below the connecting frame 601, and the assembly frame 602 is mounted on the robotic arm; a glue inlet channel 603 is provided inside the assembly frame 602; the upper end of the glue inlet channel 603 is connected to a metering cylinder 5 via a glue inlet pipe; specifically, a glue hose connector 605 is provided on the top surface of the assembly frame 602; the lower end of the glue hose connector 605 is connected to the glue inlet channel 603, and the upper end of the glue hose connector 605 is connected to a glue inlet pipe. The lower end of the glue inlet channel 603 is provided with a first branch 6031 and a second branch 6032; a first control valve 8 is provided on the first side of the assembly frame 602, the inlet end of the first control valve 8 is connected to the first branch 6031, and the outlet end of the first control valve 8 is connected to the glue application pipe 7; during glue application, the first control valve 8 is opened and the second control valve 9 is closed, the glue supply component 2 delivers glue to the transfer tank 4 through the first glue supply pipe 3, the metering cylinder 5 delivers the glue in the transfer tank 4 to the first branch 6031 in the glue inlet channel 603 through the second glue supply pipe 10, and the glue is delivered to the glue application pipe 7 through the first branch 6031 for glue application.

[0038] A second control valve 9 is installed on the second side of the assembly frame 602. The inlet of the second control valve 9 is connected to the second branch 6032, and the outlet of the second control valve 9 is connected to the transfer tank 4 through the return pipe 11. After each glue application is stopped, the first control valve 8 is closed and the second control valve 9 is opened. The metering cylinder 5 delivers the glue in the transfer tank 4 to the second branch 6032 in the glue inlet channel 603 through the second glue supply pipe 10. The glue is then delivered to the return pipe 11 through the second branch 6032 and returned to the transfer tank 4 through the return pipe 11. This allows the glue to circulate in the second glue supply pipe 10 and the return pipe 11, effectively preventing the glue from drying out in the second glue supply pipe 10 and the glue inlet channel 603, thereby improving the glue application quality of the glue application equipment.

[0039] In use, the first control valve 8 is opened and the second control valve 9 is closed. The glue supply component 2 delivers glue to the transfer tank 4 through the first glue supply pipeline 3. The transfer tank 4 performs degassing and stirring operations on the glue. The metering cylinder 5 delivers the glue from the transfer tank 4 to the first branch 6031 through the second glue supply pipeline 10. The glue is then delivered to the application pipe 7 through the first branch 6031 for application. After each application is stopped, the first control valve 8 is closed and the second control valve 9 is opened, and the metering cylinder 5... The glue in the transfer tank 4 is quantitatively delivered to the second branch 6032 through the second glue supply line 10. The glue is then delivered to the return line 11 through the second branch 6032. The glue is then returned to the transfer tank 4 through the return line 11. The transfer tank 4 performs defoaming and stirring operations on the glue. The metering cylinder 5 continuously delivers the glue in the transfer tank 4 to the second branch 6032 in the glue inlet channel 603 through the second glue supply line 10, so that the glue circulates in the second glue supply line 10 and the return line 11.

[0040] like Figure 9 As shown, in one embodiment of the present invention, the first control valve 8 includes: a first mounting housing 801, a first assembly cavity 802 disposed inside the first mounting housing 801, when the first mounting housing 801 is vertically disposed, the first cavity 808 is vertically disposed, at which time a first movable valve rod 803 is slidably disposed inside the first assembly cavity 802, a first feeding channel 804 disposed in the middle part of the first mounting housing 801, the first feeding channel 804 being connected to a first branch 6031, a first discharging channel 805 disposed at the lower end of the first mounting housing 801, the first discharging channel 805 being connected to a glue-applying tube 7, when the first movable valve rod 803 moves to the lower end of the first mounting housing 801 to the limit position, the first feeding channel 804 and the first discharging channel 805 are not connected, when the first movable valve rod 803 moves to the upper end of the first mounting housing 801 to the limit position, the first feeding channel 804 and the first discharging channel 805 are connected. By controlling the position of the first moving valve stem 803 in the first assembly cavity 802, the connection and disconnection between the first feeding channel 804 and the first discharging channel 805 can be flexibly controlled, thereby flexibly controlling the flow path of the glue along the first branch 6031 or the second branch 6032.

[0041] It should be noted that if Figure 3As shown, when the first mounting housing 801 is vertically arranged, an annular protrusion 806 is provided at the upper end of the first assembly cavity 802, and a first through hole 807 is provided at the axial position of the annular protrusion 806. The annular protrusion 806 divides the lower end of the first assembly cavity 802 into a first cavity 808 and a second cavity 809. The first cavity 808 is connected to the first feed channel 804, and the second cavity 809 is connected to the first discharge channel 805. A ball valve 8010 is sleeved at the lower end of the first moving valve stem 803. The ball valve 8010 is located in the second cavity 809, and the ball valve 8010 and the first through hole 807 are coaxially arranged. When the outer peripheral side of the ball valve 8010 abuts against the inner peripheral side of the first through hole 807, the ball valve 8010 blocks the first through hole 807, and the first cavity 808 and the second cavity 809 are not connected. At this time, the first moving valve stem 803 moves to the limit position towards the upper end of the first mounting housing 801. When the first moving valve stem 803 moves to its limit position towards the lower end of the first mounting housing 801, the outer peripheral side of the ball valve 8010 leaves the inner peripheral side of the first through hole 807. At this time, the first cavity 808 and the second cavity 809 are connected, and the glue in the first branch 6031 can be transported to the glue application tube 7 in sequence through the first feed channel 804, the first cavity 808, the second cavity 809 and the first discharge channel 805.

[0042] In one embodiment of the present invention, the upper end of the first movable valve stem 803 is connected to the first piston block 8011. The first piston block 8011 divides the upper end of the first assembly cavity 802 into a third cavity 8012 and a fourth cavity 8013. The first mounting housing 801 is provided with a first air inlet (not shown in the figure, refer to the position of the third air inlet 906) located above the first piston block 8011. The first air inlet is connected to the third cavity 8012. The first mounting housing 801 is provided with a second air inlet (not shown in the figure, refer to the position of the fourth air inlet 907) located below the first piston block 8011. The second air inlet is connected to the fourth cavity 8013. When positive pressure is supplied to the third cavity 8012 through the first air inlet and negative pressure is supplied to the third cavity 8012 through the second air inlet, the first piston block 8011 moves downward under the gas pressure until the first moving valve rod 803 moves to its limit position towards the lower end of the first mounting housing 801, and the first cavity 808 and the second cavity 809 are connected. When negative pressure is supplied to the third cavity 8012 through the first air inlet and positive pressure is supplied to the third cavity 8012 through the second air inlet, the first piston block 8011 moves upward under the gas pressure until the first moving valve rod 803 moves to its limit position towards the upper end of the first mounting housing 801. At this time, the ball valve 8010 blocks the first through hole 807, and the first cavity 808 and the second cavity 809 are not connected.

[0043] In one embodiment of the present invention, an annular groove 8014 is provided in the first assembly cavity 802 below the first piston block 8011. A support spring 8015 is provided in the annular groove 8014, and the lower end of the support spring 8015 is engaged with the annular groove 8014. The bottom surface of the first piston block 8011 is connected to the upper end of the support spring 8015. The support spring 8015 can provide a certain pushing force when the first piston block 8011 moves upward. When neither the first air inlet nor the second air inlet provides air pressure... When the first piston block 8011 is held in place by the support spring 8015, it is located at the limit position near the upper end of the first mounting housing 801. When the first piston block 8011 is subjected to air pressure, the support spring 8015 can cooperate with it to stably limit the first piston block 8011, control the height position of the first piston block 8011 in the first assembly cavity 802, and thus control the distance between the ball valve 8010 and the first through hole 807, effectively ensuring the sensitivity and accuracy of the opening and closing control action of the first control valve 8.

[0044] In one embodiment of the present invention, a sealing gasket 8016 is provided on the outer peripheral side of the first piston block 8011. The outer peripheral side of the sealing gasket 8016 fits against the inner sidewall of the assembly cavity. The sealing gasket 8016 can seal the gap between the outer peripheral side of the first piston block 8011 and the inner sidewall of the assembly cavity, ensuring that the first cavity 808 and the second cavity 809 are completely separated. Optionally, an annular limiting groove is provided on the outer peripheral side of the first piston block 8011, and the sealing gasket 8016 is disposed in the annular limiting groove. The annular limiting groove limits the sealing gasket 8016, effectively improving the stability of the sealing gasket 8016 when it moves with the first piston block 8011.

[0045] It should be noted that an mounting plate 604 is provided on one side of the assembly frame 602, and a glue discharge channel 6041 is provided inside the mounting plate 604. When the assembly frame 602 is placed vertically, the mounting plate 604 is placed horizontally. The upper end of the glue discharge channel 6041 is connected to the first discharge channel 805, and the lower end of the glue discharge channel 6041 is connected to the glue application pipe 7. The glue in the first branch 6031 can be transported to the glue application pipe 7 in sequence through the first feed channel 804, the first cavity 808, the second cavity 809, the first discharge channel 805, and the glue discharge channel 6041.

[0046] In one embodiment of the present invention, a limiting block is provided in the middle part of the first assembly cavity 802, and a through limiting hole is provided on the top surface of the limiting block. The limiting hole is slidably connected to the first moving valve rod 803. The limiting block can limit and correct the movement path of the first moving valve rod 803, thereby improving the stability of the first moving valve rod 803 when it moves up and down.

[0047] Optionally, a fixing block 8017 is provided at the upper end of the first mounting housing 801, a positioning bolt 8018 is provided on the fixing block 8017, and an insertion hole 8019 is provided at the lower end of the positioning bolt 8018. The insertion hole 8019 is slidably connected to the upper end of the first moving valve stem 803. By slidingly engaging with the first moving valve stem 803 through the insertion hole 8019, the movement path of the first moving valve stem 803 can be further limited and corrected, thereby improving the stability of the first moving valve stem 803 when it moves up and down.

[0048] like Figure 10 As shown, in one embodiment of the present invention, the second control valve 9 includes: a second mounting housing 901, a second assembly cavity 902 disposed inside the second mounting housing 901, a second movable valve stem 903 slidably disposed inside the second assembly cavity 902, a second feed channel 904 disposed at the lower end of the second mounting housing 901, the second feed channel 904 being connected to a second branch 6032, a second discharge channel 905 disposed at the middle part of the second mounting housing 901, the second discharge channel 905 being connected to a return pipe 11, when the second movable valve stem 903 moves to the upper end of the second mounting housing 901 to its limit position, the second feed channel 904 and the second discharge channel 905 are not connected, when the second movable valve stem 903 moves to the lower end of the second mounting housing 901 to its limit position, the second feed channel 904 and the second discharge channel 905 are connected.

[0049] It should be noted that the first control valve 8 and the second control valve 9 have the same structure. Specifically, the first feed channel 804 in the first control valve 8 and the second discharge channel 905 in the second control valve 9 are in the same position, and the first discharge channel 805 in the first control valve 8 and the second feed channel 904 in the second control valve 9 are in the same position. All other design principles are the same. Therefore, the specific structure and principle of the second control valve 9 will not be described in detail. Further, it should be noted that a second piston block is connected to the upper end of the second moving valve stem 903. The second piston block divides the upper end of the second assembly cavity 902 into a fifth cavity and a sixth cavity. A third air inlet 906 is provided on the second mounting housing 901 above the second piston block, connecting to the fifth cavity. A fourth air inlet 907 is provided on the second mounting housing 901 below the second piston block, connecting to the sixth cavity. The position of the first air inlet in the first control valve 8 can be referenced to the position of the third air inlet 906 in the second control valve 9, and the position of the second air inlet in the first control valve 8 can be referenced to the position of the fourth air inlet 907 in the second control valve 9.

[0050] In one embodiment of the present invention, a main control cabinet 12 is also provided on one side of the equipment frame 1. The main control cabinet 12 is connected to the glue supply pump 202, the transfer tank 4, the metering cylinder 5, the first control valve 8, the second control valve 9 and the glue application pipe 7. The main control cabinet 12 can control the glue supply pump 202, the transfer tank 4, the metering cylinder 5, the first control valve 8, the second control valve 9 and the glue application pipe 7 respectively.

[0051] It should be further explained that when two glue buckets 201 and two transfer tanks 4 are installed on the equipment rack 1, and the metering cylinder 5 is a two-component metering cylinder 5, then two glue inlet channels 603 are symmetrically arranged inside the assembly rack 602, and two glue discharge channels 6041 are symmetrically arranged inside the mounting plate 604. Each glue inlet channel 603 is provided with a first branch 6031 and a second branch 6032. At the same time, two sets of first control valves 8 and second control valves 9 are provided on the assembly rack 602. The two sets of first control valves 8 and second control valves 9 are symmetrically arranged on the assembly rack 602, and each set of first control valves 8 and second control valves 9 corresponds and cooperates, and the two sets of first control valves 8 and second control valves 9 do not affect each other. The two-component metering cylinder 5 is connected to one of the corresponding glue inlet channels 603 through two second glue supply lines 10. Both first control valves 8 are connected to the glue application pipe 7 through the corresponding glue discharge channel 6041. The two second control valves 9 are connected to the corresponding transfer tanks 4 through the corresponding return lines 11.

[0052] The working principle of this invention is as follows: During the glue application process, the first control valve 8 is opened and the second control valve 9 is closed. The glue supply component 2 delivers the glue to the transfer tank 4 through the first glue supply pipeline 3. The transfer tank 4 performs degassing and stirring operations on the glue. The metering cylinder 5 delivers the glue from the transfer tank 4 to the first branch 6031 in the glue inlet channel 603 through the second glue supply pipeline 10. The glue is then delivered to the glue application pipe 7 through the first branch 6031 for application. After each glue application operation is stopped, the first control valve 8 is closed and the second control valve 9 is closed. When control valve 9 is opened, metering cylinder 5 delivers the glue in transfer tank 4 to the second branch 6032 in glue inlet channel 603 via the second glue supply line 10. The glue is then delivered to return line 11 via the second branch line 6032 and returned to transfer tank 4 via return line 11. Transfer tank 4 performs defoaming and stirring operations on the glue. Metering cylinder 5 continuously delivers the glue in transfer tank 4 to the second branch 6032 via the second glue supply line 10, causing the glue to circulate in the second glue supply line 10 and return line 11.

[0053] In summary, after each glue application is stopped, the first control valve 8 is closed and the second control valve 9 is opened. The metering cylinder 5 delivers the glue from the transfer tank 4 to the second branch 6032 through the second glue supply pipeline 10. The glue is then delivered to the return pipeline 11 through the second branch 6032 and returned to the transfer tank 4 through the return pipeline 11. This circulation of glue in the second glue supply pipeline 10 and the return pipeline 11 effectively prevents the occurrence of dry glue in the second glue supply pipeline 10 and the glue inlet channel 603, thus improving the glue application quality of the glue application equipment.

[0054] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0055] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the present invention.

Claims

1. A glue application device with glue circulation function, characterized in that, include: A device rack, on which a robotic arm is mounted; A glue supply component is mounted on the equipment frame. The glue supply component is connected to the transfer tank through a first glue supply pipeline, and the transfer tank is connected to the metering cylinder through a second glue supply pipeline. A glue dispensing assembly is mounted on the robotic arm, and the glue dispensing assembly includes: An assembly frame is provided with an adhesive inlet channel inside. The first end of the adhesive inlet channel is connected to the metering cylinder through an adhesive inlet pipe, and the second end of the adhesive inlet channel is provided with a first branch and a second branch. A first control valve is located on the first side of the assembly frame. The inlet end of the first control valve is connected to the first branch, and the outlet end of the first control valve is connected to the glue application tube. The second control valve is located on the second side of the assembly frame. The inlet end of the second control valve is connected to the second branch, and the outlet end of the second control valve is connected to the transfer tank through a return pipeline.

2. The adhesive coating equipment with adhesive circulation function according to claim 1, characterized in that, The first control valve includes: a first mounting housing, a first assembly cavity inside the first mounting housing, a first movable valve stem slidably disposed within the first assembly cavity, a first feed channel in the middle portion of the first mounting housing connected to the first branch, a first discharge channel at the second end of the first mounting housing connected to the adhesive applicator tube, wherein when the first movable valve stem moves to its limit position towards the first end of the first mounting housing, the first feed channel and the first discharge channel are not connected, and when the first movable valve stem moves to its limit position towards the second end of the first mounting housing, the first feed channel and the first discharge channel are connected.

3. The adhesive coating equipment with adhesive circulation function according to claim 2, characterized in that, The second end of the first assembly cavity is provided with an annular protrusion, and a first through hole is provided at the axial position of the annular protrusion. The annular protrusion divides the second end of the first assembly cavity into a first cavity and a second cavity. The first cavity is connected to the first feeding channel, and the second cavity is connected to the first discharging channel. A ball valve is sleeved at the second end of the first movable valve stem. When the outer peripheral side of the ball valve abuts against the inner peripheral side of the first through hole, the first cavity and the second cavity are not connected.

4. The adhesive coating equipment with adhesive circulation function according to claim 3, characterized in that, The first end of the first movable valve stem is connected to the first piston block. The first piston block divides the first end of the first assembly cavity into a third cavity and a fourth cavity. The first mounting housing is provided with a first air inlet at a position above the first piston block. The first air inlet is connected to the third cavity. The first mounting housing is provided with a second air inlet at a position below the first piston block. The second air inlet is connected to the fourth cavity.

5. A glue coating device with glue circulation function according to claim 4, characterized in that, The first assembly cavity is provided with an annular groove located below the first piston block. A support spring is provided in the annular groove, and the other end of the support spring is connected to the bottom surface of the first piston block.

6. A glue coating device with glue circulation function according to claim 5, characterized in that, A sealing gasket is provided on the outer peripheral side of the first piston block, and the outer peripheral side of the sealing gasket is in contact with the inner sidewall of the assembly cavity.

7. A glue coating device with glue circulation function according to claim 2, characterized in that, The assembly frame has a mounting plate with a glue discharge channel inside. The first end of the glue discharge channel is connected to the first discharge channel, and the second end of the glue discharge channel is connected to the glue application tube.

8. A glue coating device with glue circulation function according to any one of claims 2-7, characterized in that, A limiting block is provided in the middle part of the first assembly cavity, and a through limiting hole is provided on the top surface of the limiting block. The limiting hole is slidably connected to the first movable valve stem.

9. A glue coating device with glue circulation function according to any one of claims 2-7, characterized in that, A fixing block is provided at the first end of the first mounting housing, a positioning bolt is provided on the fixing block, and a socket is provided at the second end of the positioning bolt, the socket being slidably connected to the first movable valve stem.

10. A glue coating device with glue circulation function according to claim 1, characterized in that, The second control valve includes: a second mounting housing, a second assembly cavity inside the second mounting housing, a second movable valve stem slidably disposed within the second assembly cavity, a second feed channel at the second end of the second mounting housing connected to the second branch, a second discharge channel at the middle part of the second mounting housing connected to the return pipeline, wherein when the second movable valve stem moves to the first end of the second mounting housing to its limit position, the second feed channel and the second discharge channel are not connected, and when the second movable valve stem moves to the second end of the second mounting housing to its limit position, the second feed channel and the second discharge channel are connected.

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