Gluing equipment

Abstract

The utility model provides gluing equipment. The gluing equipment comprises a glue gun and a glue supply device, the glue supply device comprises a glue supply pipeline and a supercharging device, and a glue outlet of the glue supply pipeline is connected with the glue gun; the pressurizing device comprises a pressurizing pump arranged on the glue supply pipeline, and the pressurizing pump is used for pressurizing glue in the glue supply pipeline so that the glue can flow out through the glue gun. Wherein the air inlet pressure of the booster pump is adjustably set. According to the technical scheme, the air inlet pressure of the booster pump is adjustably set, so that the air inlet pressure of the booster pump can be adjusted according to different stages of the gluing procedure, stable output of glue is achieved, and the gluing quality is effectively improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gluing, in particular to a gluing device. BACKGROUND

[0002] The gluing device is an important device commonly used in the automobile manufacturing industry and other manufacturing industries. The gluing quality has a great influence on the quality of the product, and therefore how to improve the gluing quality of the gluing device is a technical problem to be solved. CONTENT OF THE INVENTION

[0003] In view of the above problems, the present application provides a gluing device to effectively improve the gluing quality.

[0004] The present application provides a gluing device, comprising a glue gun and a glue supply device, the glue supply device comprising a glue supply pipeline and a pressure boosting device, the glue outlet of the glue supply pipeline being connected with the glue gun; the pressure boosting device comprising a pressure boosting pump arranged on the glue supply pipeline, the pressure boosting pump being used to pressurize the glue in the glue supply pipeline to make the glue flow out through the glue gun; wherein the inlet pressure of the pressure boosting pump is adjustably set.

[0005] The technical scheme of the present application embodiment sets the inlet pressure of the pressure boosting pump to be adjustably set, so that the inlet pressure of the pressure boosting pump can be adjusted according to different stages of the gluing process, and then the stable output of the glue is realized, and the gluing quality is effectively improved.

[0006] In some embodiments, the glue gun has an open state and a closed state, and the inlet pressure of the pressure boosting pump is configured to be smaller when the glue gun is in the closed state than when the glue gun is in the open state. The technical scheme of the present application embodiment reduces the inlet pressure when the glue gun is not opened and is in the closed state, so that the pre-pressure of the glue at the outlet of the glue gun is also reduced, thereby avoiding the excessive amount of glue caused by the excessive pre-pressure, and the inlet pressure is increased when the glue gun is opened and is in the open state, thereby stabilizing the glue output, so that the thickness of the glue profile in the entire length direction of the glue strip is stable, thereby improving the gluing quality.

[0007] In some embodiments, the pressure boosting device further comprises a gas path system for supplying gas to the pressure boosting pump, the gas path system comprising a gas source and a pressure regulating valve, the gas inlet of the pressure regulating valve being connected with the gas source, the gas outlet of the pressure regulating valve being connected with the gas inlet of the pressure boosting pump, and the pressure regulating valve being configured to adjust the pressure of the gas output from the gas outlet. The technical scheme of the present application embodiment adjusts the inlet pressure of the pressure boosting pump by setting the pressure regulating valve between the gas source and the gas inlet of the pressure boosting pump, thereby improving the gluing quality.

[0008] In some embodiments, the pressure regulating valve comprises a first pressure regulating valve, a second pressure regulating valve and a pressure switching valve, the gas inlet of the first pressure regulating valve is connected with the gas source, the gas outlet of the first pressure regulating valve is connected with the first pressure regulating gas inlet of the pressure switching valve, the gas inlet of the second pressure regulating valve is connected with the gas source, the gas outlet of the second pressure regulating valve is connected with the second pressure regulating gas inlet of the pressure switching valve, the pressure regulating gas outlet of the pressure switching valve is connected with the gas inlet of the booster pump, and the pressure switching valve is actuated to selectively communicate the pressure regulating gas outlet with the first pressure regulating gas inlet or the second pressure regulating gas inlet. The technical scheme of the embodiments of the present application realizes the switching of the inlet pressure in the open state and the closed state of the glue gun by setting the pressure switching valve, and the improvement can be easily made on the basis of the existing gas path system, so the cost can be reduced.

[0009] In some embodiments, the pressure switching valve has a first working position and a second working position, in the first working position, the first pressure regulating gas inlet of the pressure switching valve is communicated with the pressure regulating gas outlet, and in the second working position, the second pressure regulating gas inlet of the pressure switching valve is communicated with the pressure regulating gas outlet.

[0010] In some embodiments, the pressure switching valve has an electric control end for controlling the actuation of the pressure switching valve, and the electric control end is electrically connected with the switch button of the glue gun to make the pressure switching valve act according to the switch state of the glue gun. By electrically connecting the electric control end of the pressure switching valve with the switch button of the glue gun, the actuation of the pressure switching valve can be automatically triggered when the glue gun is switched, so that the glue applying device of the embodiments of the present application realizes automatic control, and the sensitivity of the inlet pressure regulation of the booster pump is improved.

[0011] In some embodiments, the booster pump comprises a cylinder and a piston movably arranged in the cylinder, the piston divides the inner cavity of the cylinder into a first cavity and a second cavity, the first cavity and the second cavity are selectively gas-filled to make the piston move bidirectionally, the first cavity is gas-filled to make the piston move forward, and the second cavity is gas-filled to make the piston move reversely. The booster pump of the embodiments of the present application is a bidirectional booster pump, so that the pressure can be increased regardless of the forward movement or the reverse movement, and the pressure increasing efficiency is higher.

[0012] In some embodiments, the pressure regulating valve comprises a first pressure regulating valve, a second pressure regulating valve and a pressure switching valve, the gas inlet of the first pressure regulating valve is connected with the gas source, the gas outlet of the first pressure regulating valve is connected with the first pressure regulating gas inlet of the pressure switching valve, the gas inlet of the second pressure regulating valve is connected with the gas source, the gas outlet of the second pressure regulating valve is connected with the second pressure regulating gas inlet of the pressure switching valve, the pressure regulating gas outlet of the pressure switching valve is connected with the gas inlet of the booster pump, and the pressure switching valve is actuated to selectively communicate the pressure regulating gas outlet with the first pressure regulating gas inlet or the second pressure regulating gas inlet. The technical scheme of the embodiments of the present application realizes the switching of the inlet pressure in the open state and the closed state of the glue gun by setting the pressure switching valve, and the improvement can be easily made on the basis of the existing gas path system, so the cost can be reduced.

[0013] In some embodiments, the pressure boosting device further comprises a sensor for detecting the position of the piston, when the sensor detects that the piston is moving forward to the first limit position, the reversing switch valve is actuated so that its reversing inlet port is in communication with the second reversing outlet port; when the sensor detects that the piston is moving reversely to the second limit position, the reversing switch valve is actuated so that its reversing inlet port is in communication with the first reversing outlet port.

[0014] By setting the sensor to detect the position of the piston in real time, when the piston moves forward to the first limit position, the reversing switch valve can be actuated in time to switch so that the piston immediately moves reversely, and similarly, when the piston moves reversely to the second limit position, the reversing switch valve can also be actuated in time to switch, so that the bidirectional reciprocating movement of the piston is without gap pause, thereby realizing efficient pressure boosting.

[0015] In some embodiments, the reversing switch valve is a pneumatic valve and comprises a first pneumatic control end and a second pneumatic control end, the gas path system further comprises a pilot valve, the pilot valve has a pilot inlet port, a first pilot outlet port and a second pilot outlet port, the pilot inlet port is connected with a gas source, the first pilot outlet port is connected with the first pneumatic control end, the second pilot outlet port is connected with the second pneumatic control end, and the pilot inlet port is selectively in communication with the first pilot outlet port or the second pilot outlet port. The reversing switch valve of the embodiment of the present application is set as a pneumatic valve, so that the gas source of the gas path system can be directly used as pilot gas for control, and therefore the structure of the entire gluing device can be simplified.

[0016] In some embodiments, the pilot valve is a pneumatic valve and comprises a third pneumatic control end and a fourth pneumatic control end, the third pneumatic control end is connected with the first cavity through a first gas path, and the fourth pneumatic control end is connected with the second cavity through a second gas path, wherein the first gas path is configured to be openable and closable according to the position of the piston; and / or, the second gas path is configured to be openable and closable according to the position of the piston. The embodiment of the present application also sets the pilot valve as a pneumatic valve, and the control gas of the pneumatic valve is formed by the gas pressure of the first cavity and the second cavity of the pressure boosting pump, which organically utilizes the original gas path of the gas path system, and further simplifies the structure of the gluing device.

[0017] In some embodiments, the pressure boosting pump comprises a bidirectional plunger pump.

[0018] The above description is only a summary of the technical solutions of the present application, in order to more clearly understand the technical means of the present application, the specific embodiments of the present application can be implemented according to the content of the description, and in order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be briefly introduced as follows. Obviously, the drawings described below only constitute some embodiments of the present application, and other drawings can be obtained by the drawings without creative labor for those skilled in the art.

[0020] Figure 1 is a schematic diagram of the principle of the gluing equipment of some embodiments of the present application.

[0021] Figure 2 is a structural schematic diagram of the air path system of the gluing equipment of some embodiments of the present application.

[0022] In the drawings, the drawings are not drawn according to the actual proportion.

[0023] Label explanation:

[0024] 1, glue supply pipeline; 11, glue inlet; 12, glue outlet;

[0025] 2, pressure increasing device;

[0026] 21, pressure increasing pump; 211, cylinder body; 2111, first cavity; 2112, second cavity; 212, piston;

[0027] 22, air path system; 221, air source; 222, pressure regulating valve; 2221, first pressure regulating valve; 2222, second pressure regulating valve; 2223, air pressure switching valve; 223, reversing switching valve; 224, first machine control valve; 225, second machine control valve; 226, pilot valve. DETAILED DESCRIPTION

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion.

[0029] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0030] Reference to“an embodiment” herein means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase“in an embodiment” in various places in the specification are not necessarily referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. As will be apparent to those of ordinary skill in the art, embodiments described herein can be combined with other embodiments in accordance with the application.

[0031] In the description of the embodiments of the application, the term“and / or” only means an association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can mean that A exists alone, A and B exist together, and B exists alone. In addition, the character“ / ” herein generally means that the front and rear associated objects have an“or” relationship.

[0032] In the description of the embodiments of the application, the term“a plurality of” means more than two (including two), and similarly, “a plurality of groups” means more than two groups (including two groups), and “a plurality of pieces” means more than two pieces (including two pieces).

[0033] In the description of the embodiments of the application, the technical terms“center”,“longitudinal”,“transverse”,“length”,“width”,“thickness”,“upper”,“lower”,“front”,“rear”,“left”,“right”,“vertical”,“horizontal”,“top”,“bottom”,“inner”,“outer”,“clockwise”,“counterclockwise”,“axial”,“radial”,“circumferential” and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the application.

[0034] In the description of the embodiments of the application, unless otherwise explicitly specified and limited, the technical terms“mounting”,“connection”,“connection”,“fixing” and the like should be understood broadly, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meaning of the above terms in the embodiments of the application can be understood according to the specific circumstances.

[0035] The glue coating equipment is a kind of equipment commonly used in automobile production line. The glue needs to pass through the pressurization device for pressurization when conveying to the glue gun, and the pressurization of the pressurization device will cause the initial section of the glue strip formed by the glue coating to be too thick, thus causing the glue coating quality to be not high. The following will take the commonly used plunger pump as an example to explain the causes of the problem in detail. The compression ratio of the commonly used plunger pump is 55:1. During the glue supply process of the plunger pump, the inlet pressure is about 4 bar. Through the compression conversion of the plunger pump, the glue pressure through the outlet of the plunger pump is about 220 bar. Since the glue gun outlet is not opened, the glue is always in a state of being pressurized by the plunger pump, so the pre-pressure of the glue at the outlet of the glue gun is about equal to the glue pressure at the outlet of the plunger pump, about 220 bar. At the moment when the outlet of the glue gun is opened, the pre-pressure is released, and a large amount of glue flows to the workpiece, forming a section of glue strip with excessive glue accumulation. After the pre-pressure is released, since the outlet of the glue gun has been opened, the pressure of the glue at the outlet of the glue gun is affected by the pressurization of the plunger pump, as well as the friction, viscosity and other factors. The actual measured pressure of the glue at the outlet of the glue gun is about 60 bar to 100 bar at this time, and the glue discharge speed and amount are stable at this time. Through the above analysis, it can be known that, since the glue is always in a state of being pressurized when the outlet of the glue gun is not opened, a large amount of glue will be sprayed at the moment when the outlet of the glue gun is opened, that is, at the initial time of glue coating, and thus the width / gel amount of the initial section of the glue strip formed is greater than that in the stable glue discharge state.

[0036] In view of the above problem, the present application provides a glue coating equipment. By adjusting the inlet pressure of the pressurization pump, the inlet pressure can be reduced when the glue gun is in a closed state, the pre-pressure of the glue at the moment when the glue gun is opened can be reduced, and thus the amount of glue sprayed can be reduced, and the glue coating quality can be effectively improved. When the glue gun is in an open state, the inlet pressure can be increased, so that the glue can be stably discharged, and a glue strip with stable quality can be formed.

[0037] The structure and working process of the glue coating equipment of some embodiments of the present application will be described in detail below. Figure 1 Figure 2 The structure and working process of the glue coating equipment of some embodiments of the present application will be described in detail below.

[0038] Referring to Figure 1 Figure 2 , the glue coating equipment of some embodiments of the present application comprises a glue gun (not shown in the figure) and a glue supply device. The glue supply device comprises a glue supply pipeline 1 and a pressurization device 2. The glue outlet 12 of the glue supply pipeline 1 is connected with the glue gun. The pressurization device 2 comprises a pressurization pump 21 arranged on the glue supply pipeline 1. The pressurization pump 21 is used for pressurizing the glue in the glue supply pipeline 1 to make the glue flow out through the glue gun. The inlet pressure of the pressurization pump 21 is adjustably arranged.

[0039] In Figure 2 ​​In the illustrated embodiment, the pressure boosting device 2 includes a pressure boosting pump 21 and a gas path system 22 for supplying gas to the pressure boosting pump 21. The gas path system 22 includes a gas source 221 and a pressure regulating valve 222 disposed between the gas source 221 and the pressure boosting pump 21. The pressure regulating valve 222 is configured to regulate the pressure of the gas supplied by the gas source 221 and to supply the gas to the pressure boosting pump 21 after the regulation, thereby achieving adjustment of the intake pressure of the pressure boosting pump 21. In some embodiments, as shown in Figure 2 The pressure regulating valve 222 includes a first pressure regulating valve 2221, a second pressure regulating valve 2222 and a gas pressure switching valve 2223. The gas pressure switching valve 2223 is configured to cause the gas to be delivered to the pressure boosting pump 21 through the pressure regulating of the first pressure regulating valve 2221 or through the pressure regulating of the second pressure regulating valve 2222, and the pressure regulating pressures of the first pressure regulating valve 2221 and the second pressure regulating valve 2222 are different, thereby achieving adjustment of the intake pressure of the pressure boosting pump 21. In other embodiments not shown in the figures, the pressure regulating valve 222 can also be implemented by a single pressure regulating valve.

[0040] As shown in Figure 1 The glue supply pipe 1 has a glue inlet 11 and a glue outlet 12. The glue inlet 11 is formed on an axial end surface of the glue supply pipe 1, and the glue outlet 12 is formed on a side wall of the glue supply pipe 1, so that the glue is output in an output direction that is inclined to the axial direction of the glue supply pipe 1. However, the embodiments of the present application do not limit this, and in other embodiments, the glue outlet 12 can also be formed on the axial end surface of the glue supply pipe 1.

[0041] The pressure boosting pump 21 is configured to pressurize the glue and then supply the glue to the glue outlet 12 for being sprayed by the glue gun. The pressure boosting pump 21 can be a plunger pump, and further can be a bidirectional plunger pump.

[0042] The technical solution of the embodiments of the present application adjusts the intake pressure of the pressure boosting pump 21, so that the intake pressure of the pressure boosting pump 21 can be adjusted according to different stages of the glue application process, thereby achieving stable output of the glue and effectively improving the glue application quality.

[0043] As mentioned above, the inventors of the present application found that the main problem of glue application is that the glue will be sprayed in large amount under the action of a large pre-pressure when the glue application just starts, thereby making the initial section of the glue strip thick. In order to solve this problem, in some embodiments, the glue gun has an open state and a closed state, and the intake pressure of the pressure boosting pump 21 in the closed state of the glue gun is configured to be smaller than the intake pressure of the pressure boosting pump 21 in the open state of the glue gun.

[0044] The technical scheme of the embodiment of the present application reduces the air inlet pressure when the glue gun is not opened and is in a closed state, so that the pre-pressure of the glue at the outlet of the glue gun is also reduced, thereby avoiding the too large instantaneous glue amount caused by the too large pre-pressure, and the air inlet pressure is increased when the glue gun is opened and is in an opened state, thereby stabilizing the glue output, so that the thickness of the glue type in the entire length direction of the glue strip is stable, thereby improving the glue coating quality.

[0045] In some embodiments, as shown in Figure 2 The glue supply device further includes an air path system 22 for supplying air to the booster pump 21. The air path system 22 includes an air source 221 and a pressure regulating valve 222. The air inlet of the pressure regulating valve 222 is connected with the air source 221, the air outlet of the pressure regulating valve 222 is connected with the air inlet of the booster pump 21, and the pressure regulating valve 222 is configured to regulate the pressure of the air output from the air outlet thereof.

[0046] The technical scheme of the embodiment of the present application regulates the air inlet pressure of the booster pump 21 by setting the pressure regulating valve 222 between the air source 221 and the air inlet of the booster pump 21, thereby improving the glue coating quality.

[0047] Referring to Figure 2 In some embodiments, the pressure regulating valve 222 includes a first pressure regulating valve 2221, a second pressure regulating valve 2222, and an air pressure switching valve 2223. The air inlet of the first pressure regulating valve 2221 is connected with the air source 221, the air outlet of the first pressure regulating valve 2221 is connected with the first pressure regulating air inlet of the air pressure switching valve 2223, the air inlet of the second pressure regulating valve 2222 is connected with the air source 221, the air outlet of the second pressure regulating valve 2222 is connected with the second pressure regulating air inlet of the air pressure switching valve 2223, the pressure regulating air outlet of the air pressure switching valve 2223 is connected with the air inlet of the booster pump 21, and the air pressure switching valve 2223 is actuated to selectively connect the pressure regulating air outlet thereof with the first pressure regulating air inlet thereof or the second pressure regulating air inlet thereof.

[0048] As shown in Figure 2 The air source 221 is connected with the air pressure switching valve 2223 through two air paths, and the first pressure regulating valve 2221 and the second pressure regulating valve 2222 are respectively arranged on the two air paths. The pressure regulating pressures of the first pressure regulating valve 2221 and the second pressure regulating valve 2222 are different. In this way, by controlling the air pressure switching valve 2223 to be actuated to make the air supplied by the air source 221 pass through the pressure regulation of the first pressure regulating valve 2221 or the second pressure regulating valve 2222 and then be supplied to the booster pump 21, the air inlet pressure of the booster pump 21 is regulated.

[0049] The technical scheme of the embodiment of the present application regulates and switches the air inlet pressure in the opened state and the closed state of the glue gun by setting the air pressure switching valve 2223, and the improvement can be easily made on the basis of the existing air path system, so the cost can be reduced.

[0050] In some embodiments, the air pressure switching valve 2223 has a first working position and a second working position. In the first working position, the first pressure regulating inlet of the air pressure switching valve 2223 is in communication with its pressure regulating outlet. In the second working position, the second pressure regulating inlet of the air pressure switching valve 2223 is in communication with its pressure regulating outlet.

[0051] In some embodiments, the air pressure switching valve 2223 has an electric control end 2223a for controlling its action. The electric control end 2223a is electrically connected with the switch button of the glue gun so that the air pressure switching valve 2223 acts according to the switch state of the glue gun.

[0052] Specifically, the air pressure switching valve 2223 is an electromagnetic valve. And the electromagnetic valve is electrically connected with the switch button of the glue gun, so that when the switch button of the glue gun is opened, the electromagnetic valve is triggered to switch the air path of the inlet air, thereby changing the inlet air pressure.

[0053] By electrically connecting the electric control end of the air pressure switching valve 2223 with the switch button of the glue gun, the action of the air pressure switching valve 2223 can be automatically triggered when the glue gun is switched, thereby enabling the glue applying device of the present application to realize automatic control and improving the sensitivity of the inlet air pressure regulation of the booster pump.

[0054] In some embodiments, the booster pump 21 includes a cylinder body 211 and a piston 212 movably arranged in the cylinder body 211. The piston 212 divides the inner cavity of the cylinder body 211 into a first cavity 2111 and a second cavity 2112. The first cavity 2111 and the second cavity 2112 are selectively inlets for air to make the piston 212 move bidirectionally, the first cavity 2111 is an inlet for air, and the piston 212 moves forward. The second cavity 2112 is an inlet for air, and the piston 212 moves reversely.

[0055] The booster pump 21 of the present application is a bidirectional booster pump, so that it can realize pressure boosting whether moving forward or reversely, and the pressure boosting efficiency is higher.

[0056] In some embodiments, the glue supply device further includes an air path system 22 for supplying air to the booster pump 21. The air path system 22 includes an air source 221 and a reversing switching valve 223, the reversing switching valve 223 has a reversing inlet, a first reversing outlet and a second reversing outlet. The reversing inlet is connected with the air source 221, the first reversing outlet is connected with the first cavity 2111, and the second reversing outlet is connected with the second cavity 2112. The reversing switching valve 223 is configured to act according to the position of the piston 212 to switch the reversing inlet to be selectively in communication with the first reversing outlet or the second reversing outlet.

[0057] The bidirectional movement of the piston 212 is realized by the action of the reversing switching valve 223, and the pressure boosting efficiency is improved.

[0058] In some embodiments, the glue supply device further comprises a sensor for detecting the position of the piston 212, when the sensor detects that the piston 212 is moving forward to the first limit position, the reversing switch valve 223 is actuated so that its reversing inlet port is in communication with the second reversing outlet port; when the sensor detects that the piston 212 is moving reversely to the second limit position, the reversing switch valve 223 is actuated so that its reversing inlet port is in communication with the first reversing outlet port.

[0059] By setting the sensor to detect the position of the piston 212 in real time, when the piston 212 moves forward to the first limit position, the reversing switch valve 223 can be actuated in time to switch so that the piston 212 immediately moves reversely, and similarly, when the piston 212 moves reversely to the second limit position, the reversing switch valve 223 can also be actuated in time to switch, so that the bidirectional reciprocating movement of the piston 212 has no gap pause, thereby realizing efficient supercharging.

[0060] In some embodiments, the reversing switch valve 223 is a pneumatic valve and comprises a first pneumatic control end and a second pneumatic control end. The gas path system 22 further comprises a pilot valve 226. The pilot valve 226 has a pilot inlet port, a first pilot outlet port and a second pilot outlet port. The pilot inlet port is connected with the gas source 221, the first pilot outlet port is connected with the first pneumatic control end, the second pilot outlet port is connected with the second pneumatic control end, and the pilot inlet port is selectively in communication with the first pilot outlet port or the second pilot outlet port.

[0061] The reversing switch valve 223 of the embodiments of the present application is set as a pneumatic valve, so that the gas source 221 of the gas path system can be directly used as pilot gas for control, and therefore the structure of the entire glue application device can be simplified.

[0062] In some embodiments, the pilot valve 226 is a pneumatic valve and comprises a third pneumatic control end and a fourth pneumatic control end, the third pneumatic control end is connected with the first cavity 2111 through a first gas path, and the fourth pneumatic control end is connected with the second cavity 2112 through a second gas path, wherein the first gas path is configured to be openable and closable according to the position of the piston 212; and / or the second gas path is configured to be openable and closable according to the position of the piston 212.

[0063] A first machine control valve 224 is arranged on the first gas path, and a second machine control valve 225 is arranged on the second gas path, thereby realizing openable and closable control of the first gas path and the second gas path.

[0064] The embodiments of the present application also set the pilot valve as a pneumatic valve, and the control gas of the pneumatic valve is formed by the gas pressure of the first cavity and the second cavity of the supercharging pump, which organically utilizes the original gas path of the gas path system, and further simplifies the structure of the glue application device.

[0065] The following will be described according to the working principle of the glue application device. Figure 1and Figure 2 The structure and working process of the gluing device of one specific embodiment of the present application are described in detail.

[0066] As Figure 1 shown, the gluing device of the present embodiment comprises a glue gun (not shown in the figure) and a glue supply device. The glue supply device comprises a glue supply pipeline 1 and a pressure boosting device 2. The glue inlet of the glue supply pipeline 1 is connected with a glue storage device, and the glue outlet 12 of the glue supply pipeline 1 is connected with the glue gun. In this specific embodiment, the glue outlet 12 is arranged on the side wall of the glue supply pipeline 1.

[0067] The pressure boosting device 2 comprises a pressure boosting pump 21 arranged on the glue supply pipeline 1. The pressure boosting pump 21 is used to pressurize the glue in the glue supply pipeline 1 so that the glue flows out through the glue gun. As Figure 2 shown, the pressure boosting pump 21 comprises a cylinder body 211 and a piston 212 movably arranged in the cylinder body 211. The piston 212 separates the inner cavity of the cylinder body 211 into a first cavity 2111 and a second cavity 2112. Both the first cavity 2111 and the second cavity 2112 can be formed as an air inlet cavity. When the first cavity 2111 is air-inlet, the piston 212 moves to the left under the action of air pressure; when the second cavity 2112 is air-inlet, the piston 212 moves to the right under the action of air pressure.

[0068] In this embodiment, the pressure boosting pump 21 is a bidirectional plunger pump.

[0069] As Figure 2 shown, the glue supply device of the present embodiment further comprises an air path system 22 for supplying air to the pressure boosting pump 21. The air path system 22 comprises an air source 221 (which can be specifically an air source), a pressure regulating valve 222, a reversing switch valve 223, a first machine control valve 224, a second machine control valve 225 and a pilot valve 226.

[0070] The air provided by the air source 221 flows into the pressure boosting pump 21 in sequence through the pressure regulating valve 222 and the reversing switch valve 223. The reversing switch valve 223 is used to make the first cavity or the second cavity of the pressure boosting pump 21 air-inlet so as to reverse the moving direction of the piston of the pressure boosting pump 21. Specifically, as Figure 2 shown, the reversing switch valve 223 comprises a reversing air inlet connected with the pressure regulating valve 222, a first reversing air outlet connected with the first cavity 2111 and a second reversing air outlet connected with the second cavity 2112. The reversing air inlet selectively communicates with the first reversing air outlet or the second reversing air outlet so as to make the air provided by the air source 221 flow into the first cavity 2111 or the second cavity 2112.

[0071] As Figure 2As shown, the reversing valve 223 has a first working position and a second working position. In the first working position, the reversing inlet is connected to the first reversing outlet; in the second working position, the reversing inlet is connected to the second reversing outlet.

[0072] Specifically, when piston 212 moves to the first extreme position to the left, reversing valve 223 is activated to switch to the second working position, thereby allowing gas supplied by gas source 221 to enter the second chamber 2112, which in turn causes piston 212 of booster pump 21 to move to the right; when piston 212 moves to the second extreme position to the right, reversing valve 223 is activated to switch to the first working position, thereby allowing gas supplied by gas source 221 to enter the first chamber 2111, which in turn causes piston 212 of booster pump 21 to move to the left.

[0073] like Figure 2 As shown, the reversing valve 223 in this embodiment is a pneumatically controlled valve, and has a first pneumatically controlled end and a second pneumatically controlled end located at both ends. The first pneumatically controlled end and the second pneumatically controlled end are respectively connected to the two pilot outlet ports of the pilot valve 226. The pilot inlet port of the pilot valve 226 is connected to the air source 221. The first pilot outlet port of the pilot valve 226 is connected to the first pneumatically controlled end of the reversing valve 223, and the second pilot outlet port of the pilot valve 226 is connected to the second pneumatically controlled end of the reversing valve 223. The pilot valve 226 operates to switch its own working position, thereby allowing its pilot inlet port to selectively connect with either the first pilot outlet port or the second pilot outlet port.

[0074] Pilot valve 226 is also a pneumatically controlled valve. Its third pneumatically controlled end is connected to the first chamber of booster pump 21 via first mechanical control valve 224, and its fourth pneumatically controlled end is connected to the second chamber of booster pump 21 via second mechanical control valve 225. When booster pump 21 moves to its right limit position, second mechanical control valve 225 switches to the connected state, thereby allowing gas from the second chamber of booster pump 21 to flow to the pneumatically controlled end of pilot valve 226, causing pilot valve 226 to actuate. This, in turn, causes reversing valve 223 to actuate, allowing gas supplied by gas source 221 to enter the first chamber 2111, driving piston 212 of booster pump 21 to move to the left. Similarly, when piston 212 moves to the left limit position, the first mechanical control valve 224 switches to the connected state, which causes the gas in the first chamber of booster pump 21 to flow to the other pneumatic control end of pilot valve 226, thereby controlling the pilot valve 226 to operate. Then, the pilot gas in pilot valve 226 will cause the reversing valve 223 to operate, so that gas enters the second chamber 2112 to continue driving piston 212 of booster pump 21 to move to the right.

[0075] It can be seen that the gluing equipment of the embodiment realizes the bidirectional pressurization of the booster pump 21 through the setting of the reversing switch valve 223, thereby improving the pressurization efficiency. Moreover, the switching action of the reversing switch valve 223 is triggered according to the limit position of the piston 212, so that the control is more accurate.

[0076] As shown in Figure 2 The pressure regulating valve 222 is further provided between the gas source 221 and the reversing switch valve 223. The pressure regulating valve 222 includes a first pressure regulating valve 2221, a second pressure regulating valve 2222 and a gas pressure switch valve 2223. The gas is delivered to the booster pump 21 through the pressure regulation of the first pressure regulating valve 2221 or the second pressure regulating valve 2222 through the action of the gas pressure switch valve 2223, and the pressure regulating pressures of the first pressure regulating valve 2221 and the second pressure regulating valve 2222 are different, thereby realizing the adjustment of the inlet gas pressure of the booster pump 21.

[0077] Moreover, the gas pressure switch valve 2223 is an electromagnetic valve, which is electrically connected with the switch button of the glue gun. When the glue gun is opened, the gas pressure switch valve 2223 is driven to act, thereby realizing the conversion of the gas path. Similarly, when the glue gun is closed, the gas pressure switch valve 2223 is also driven to act, thereby realizing the conversion of the gas path. Through the pressure regulating valve 222, the inlet gas pressure when the glue is normally discharged is different from the inlet gas pressure when the glue is stopped, so that the glue body pre-pressure of the glue gun nozzle is reduced when the glue is stopped, which is similar to the glue body pressure when the glue is normally discharged, thereby reducing the large accumulation at the beginning of the glue application, and effectively improving the glue application quality.

[0078] When the glue is not applied, the switch button of the glue gun is not pressed down, and the electric signal cannot be triggered. Under the action of the spring, the gas pressure switch valve 2223 is in the left position, and the inlet gas of the booster pump 21 is in the gas path of the first pressure regulating valve 2221. The first pressure regulating valve 2221 adjusts the inlet gas pressure to about 2 bar (which is adjusted according to the actual situation on the site), and through the conversion of the 55:1 plunger pump, the glue body pre-pressure of the glue gun head is not higher than 110 bar.

[0079] In the process of glueing, the switch button of the glue gun is pressed for a moment, and the glue is sprayed out. Because the pre-pressure is not higher than 110 bar, the amount of glue is relatively small. At the same time, the switch button of the glue gun triggers an electric signal, which is sent to the air pressure switching valve 2223. Under the action of the electric signal, the air pressure switching valve 2223 switches to the right position. At this time, the inlet of the booster pump 21 is in the air path under the action of the second pressure regulating valve 2222. The second pressure regulating valve 2222 can be adjusted to an inlet pressure of about 4 bar (adjusted according to the actual situation on site). At this time, the glue line has begun to release the pre-pressure, and the glue flows out stably. At this time, the pressure of the glue at the head of the glue gun is about 60-100 bar, the pressure changes little before and after, the glue is stable, and the problem of too much glue at the moment of glue discharge is solved.

[0080] Although the present application has been described with reference to the preferred embodiments, various modifications can be made to it without departing from the scope of the application, and equivalent components can be substituted therefor. In particular, the technical features mentioned in each embodiment can be combined in any way, provided that there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A gluing apparatus characterized by, The application relates to a glue gun and a glue supply device. The glue gun comprises: a glue gun; and a glue supply device comprising a glue supply pipeline (1) and a pressure boosting device (2), wherein the glue outlet (12) of the glue supply pipeline (1) is connected with the glue gun, and the pressure boosting device (2) comprises a pressure boosting pump (21) arranged on the glue supply pipeline (1), which is used for pressurizing the glue in the glue supply pipeline to make the glue flow out of the glue gun.

2. The gluing apparatus according to claim 1, characterized in that, The inlet pressure of the pressure boosting pump (21) is adjustably arranged.

3. The gluing apparatus according to claim 1, wherein The glue gun has an open state and a closed state, and the inlet pressure of the pressure boosting pump (21) in the closed state of the glue gun is configured to be smaller than the inlet pressure of the pressure boosting pump (21) in the open state of the glue gun.

4. The gluing apparatus according to claim 3, wherein The pressure boosting device (2) further comprises a gas path system (22) for supplying air to the pressure boosting pump (21), which comprises an air source (221) and a pressure regulating valve (222), the air inlet of the pressure regulating valve (222) is connected with the air source (221), the air outlet of the pressure regulating valve (222) is connected with the air inlet of the pressure boosting pump (21), and the pressure regulating valve (222) is configured to regulate the pressure of the air output from the air outlet.

5. The gluing apparatus according to claim 4, wherein The pressure regulating valve (222) comprises a first pressure regulating valve (2221), a second pressure regulating valve (2222) and an air pressure switching valve (2223), the air inlet of the first pressure regulating valve (2221) is connected with the air source (221), the air outlet of the first pressure regulating valve (2221) is connected with the first pressure regulating air inlet of the air pressure switching valve (2223), the air inlet of the second pressure regulating valve (2222) is connected with the air source (221), the air outlet of the second pressure regulating valve (2222) is connected with the second pressure regulating air inlet of the air pressure switching valve (2223), the pressure regulating air outlet of the air pressure switching valve (2223) is connected with the air inlet of the pressure boosting pump (21), and the air pressure switching valve (2223) is actuated to selectively communicate the pressure regulating air outlet with the first pressure regulating air inlet or the second pressure regulating air inlet.

6. The gluing apparatus according to claim 4, wherein The air pressure switching valve (2223) has a first working position and a second working position, in the first working position, the first pressure regulating air inlet of the air pressure switching valve (2223) is communicated with the pressure regulating air outlet, and in the second working position, the second pressure regulating air inlet of the air pressure switching valve (2223) is communicated with the pressure regulating air outlet. The air pressure switching valve (2223) has an electric control end (2223a) for controlling the actuation of the air pressure switching valve (2223), and the electric control end (2223a) is electrically connected with the switch button of the glue gun to make the air pressure switching valve (2223) act according to the switch state of the glue gun.

7. The gluing apparatus according to any one of claims 1 to 6, characterized in that, The booster pump (21) comprises a cylinder (211) and a piston (212) movably arranged in the cylinder (211), the piston (212) separates an inner cavity of the cylinder (211) into a first cavity (2111) and a second cavity (2112), the first cavity (2111) and the second cavity (2112) are selectively filled with air to make the piston (212) move reciprocally in two directions, the first cavity (2111) is filled with air, the piston (212) moves forward; the second cavity (2112) is filled with air, the piston (212) moves reversely.

8. The gluing apparatus according to claim 7, wherein The booster device (2) further comprises an air path system (22) for supplying air to the booster pump (21), the air path system (22) comprises an air source (221) and a reversing switch valve (223), the reversing switch valve (223) has a reversing air inlet, a first reversing air outlet and a second reversing air outlet, the reversing air inlet is connected with the air source (221), the first reversing air outlet is connected with the first cavity (2111), the second reversing air outlet is connected with the second cavity (2112), the reversing switch valve (223) is configured to act according to the position of the piston (212) to switch the reversing air inlet to be selectively communicated with the first reversing air outlet or the second reversing air outlet.

9. The gluing apparatus according to claim 8, wherein The booster device (2) further comprises a sensor for detecting the position of the piston (212), when the sensor detects that the piston (212) moves forward to a first limit position, the reversing switch valve (23) acts to make the reversing air inlet thereof communicated with the second reversing air outlet; when the sensor detects that the piston (212) moves reversely to a second limit position, the reversing switch valve (23) acts to make the reversing air inlet thereof communicated with the first reversing air outlet.

10. The gluing apparatus according to claim 9, wherein The reversing switch valve (23) is a pneumatic control valve and comprises a first pneumatic control end and a second pneumatic control end, the air path system (22) further comprises a pilot valve (226), the pilot valve (226) has a pilot air inlet, a first pilot air outlet and a second pilot air outlet, the pilot air inlet is connected with the air source (221), the first pilot air outlet is connected with the first pneumatic control end, the second pilot air outlet is connected with the second pneumatic control end, the pilot air inlet is selectively communicated with the first pilot air outlet or the second pilot air outlet.

11. The gluing apparatus according to claim 10, wherein The pilot valve (226) is a pneumatic control valve and comprises a third pneumatic control end and a fourth pneumatic control end, the third pneumatic control end is connected with the first cavity (2111) through a first air path, the fourth pneumatic control end is connected with the second cavity (2112) through a second air path, wherein, the first air path is configured to be openable or closeable according to the position of the piston (212); and / or, the second air path is configured to be openable or closeable according to the position of the piston (212).

12. The gluing apparatus according to any one of claims 1 to 6, characterized in that, The booster pump (21) comprises a bidirectional plunger pump.

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