Carton hot melt adhesive spraying system special for C800-BV packaging machine

Abstract

The utility model provides a carton hot melt adhesive spraying system special for a C800-BV packaging machine. The carton hot melt adhesive spraying system comprises a hot melt adhesive spraying gun module, a hot melt adhesive cylinder, a piston pump, an adhesive pipe, a PLC (programmable logic controller), an amplifier and the like. The hot melt adhesive cylinder and the piston pump are used for heating and pressurizing the hot melt adhesive; the glue pipe is connected with the hot melt glue cylinder, heats to maintain the temperature of glue and conveys the glue to the spray gun; the spray gun module is connected with a glue pipe to complete hot melt glue spraying; the PLC receives a trigger signal of a carton spray gun of the C800-BV packaging machine, and carries out operation processing by fusing a control signal of a hot melt adhesive system and a safety interlocking signal; the amplifier is connected with the PLC and used for receiving instructions of the controller and generating spray gun control signals to control the spray gun to spray. According to the cold glue spraying system, the problems that an original cold glue spraying system is prone to uneven glue spraying, glue points are lost and the like are solved, the carton packaging quality is remarkably improved, the labor intensity of operation and maintenance of the packaging machine is reduced, the working efficiency of equipment is improved, and the cold glue spraying system can be popularized and applied to other C800-BV packaging machines.

Description

Technical Field

[0001] The utility model relates to the technical field of improvement of tobacco processing equipment packaging machines, in particular to a strip box hot melt adhesive spraying system specially used for a C800-BV packaging machine. Background Art

[0002] In the past, ordinary cold glue was enough to meet the bonding requirements of cigarette boxes and strip packaging. The original cold glue spraying system had problems such as uneven glue spraying and glue point loss, which may be due to the following reasons: 1. The viscosity of cold glue is greatly affected by the environment: The viscosity of cold glue is easily affected by environmental factors such as temperature and humidity, resulting in unstable fluidity under different conditions, thus affecting the uniformity and accuracy of glue spraying. 2. Cold glue takes a long time to cure: Compared with the fast curing characteristics of hot melt adhesive, cold glue takes longer to cure. During this period, if the product moves or the production line speed is fast, it is easy to cause the glue points to be misplaced or lost. 3. The accuracy limitations of the cold glue spraying system: Traditional cold glue spraying systems may rely on simple mechanical or pneumatic controls, which may not be as accurate as modern electronic control systems, such as hot melt adhesive systems controlled by PLCs and amplifiers.

[0003] Nowadays, with the application of high-speed packaging machines and the continuous introduction of new packaging materials, packaging adhesives with faster bonding and stronger adhesion are needed. Compared with water-based adhesives, hot melt adhesives have become the first choice for some high-speed packaging machines and some materials that are difficult to bond because of their fast bonding speed and adaptability to bonding of materials that are not easily penetrated. Summary of the invention

[0004] In order to solve the above-mentioned deficiencies and defects in the prior art, the inventor has designed and tested a stably operating hot melt adhesive spraying system for paper strips. The system has the characteristics of stable operation, precise gluing, safe and reliable control, and greatly improves the gluing efficiency and bonding success rate of paper strips. Specifically, the utility model is implemented as follows:

[0005] A hot melt adhesive spraying system for strip boxes specially used for C800-BV packaging machine, including:

[0006] Hot melt adhesive cylinder is used to store and heat hot melt adhesive to melt it into liquid adhesive.

[0007] The piston pump is placed in the hot melt adhesive cylinder and can pump the hot melt adhesive melted in the adhesive cylinder to the rubber hose connected to it and keep the pressure of the adhesive liquid in the rubber hose constant;

[0008] A hose, one end of which is connected to a piston pump, and the other end of which is connected to a hot melt adhesive spraying module, is electronically connected through a connector, and delivers the hot melt adhesive to the hot melt adhesive spraying module under the pressure of the piston pump;

[0009] The hot melt glue spraying module is used to integrate and install several spray guns arranged side by side horizontally, and connect the spray guns with the hoses for installation. Each spray gun is connected to the PLC controller and can be controlled by the PLC controller to start and stop spraying glue;

[0010] Hot melt adhesive assembly bracket, used to fix the hot melt adhesive spraying module and installed on the glue application station of the C800-BV packaging machine;

[0011] The PLC controller is connected with the hot melt glue cylinder, piston pump, rubber hose, hot melt glue spraying module and amplifier through the control circuit. It is used to obtain the real-time data of each part of the system. It can receive the trigger signal of the C800-BV packaging machine box spray gun, and receive the controller command through the amplifier to generate the spray gun control signal to control the spray gun to spray glue.

[0012] Furthermore, the hot melt adhesive spraying module has four spray guns, which are installed in a horizontal and parallel manner on the hot melt adhesive assembly bracket, and are arranged in sequence to align with the left ear of the strip box, the left point of the strip box bonding edge, the right point of the strip box bonding edge, and the right ear of the strip box.

[0013] Furthermore, the control circuit is connected to a PLC controller, an amplifier, sensors and encoders installed in the C800-BV packaging machine, hot melt adhesive cylinder, hose, piston pump, and a control display screen installed on the operating table; wherein: the PLC controller can access the original host signal of the C800-BV packaging machine, the original machine spray gun start signal, the control display screen and the human-machine operation interface for integrated design, the control circuit also includes a hot melt adhesive spray control signal and a safety interlock signal obtained by the sensor, and is connected to the PLC controller, the PLC controller is connected to the solenoid valves installed on each spray gun through the amplifier, and can control the action of each solenoid valve to start and stop the spraying; the control signal includes the capacity, pressure, and temperature signals of the hot melt adhesive cylinder, and the temperature signal of the hot melt adhesive hose, and the pressure and temperature of the hot melt adhesive system can be controlled to be constant through the PLC; the safety interlock signal includes a protective cover closing signal, a spray assembly position in place signal and a Bypass signal.

[0014] Furthermore, a spray gun in place signal detection relay is connected to the circuit of each spray gun, and the circuit of the spray gun is connected to the control circuit bus. The control circuit bus is also connected to status signal detection relays for the glue cylinder in place, the hose in place, the drive shaft phase is correct, the strip box in place, and the protective cover closed signal detection relay; wherein the spray gun in place signal and the protective cover closed signal are safety interlock connections.

[0015] Furthermore, the control circuit also includes a manual mode switch that bypasses the spray gun and protective cover detection circuit and accesses the control circuit.

[0016] Furthermore, the hot melt adhesive assembly bracket includes: left and right side plates, which are respectively installed on both sides of the spray gun bracket, the inner side surfaces are used to install the two ends of the base plate, and the outer side surfaces are used to be fixedly installed on the gluing station of the C800-BV packaging machine; the base plate is horizontally installed between the left and right side plates for installing the spray gun bracket; the spray gun bracket is horizontally installed on the base plate for installing the hose and the spray gun, the hose is connected to the interior of the spray gun bracket, and is divided into several branch pipelines which are respectively connected to each spray gun for supplying hot melt adhesive.

[0017] Furthermore, a left connecting seat and a right connecting seat are installed on both ends of the bottom plate, and are installed and fixed to the left plate and the right plate by bolts passing through the left connecting seat and the right connecting seat; it also includes a bracket baffle, which is longitudinally installed between the spray gun bracket and the strip box conveying channel, and is used to isolate the hot melt glue spray and the strip box paperboard. Slots are opened on the plate surface of the bracket baffle at the position corresponding to each spray gun nozzle, and the hot melt glue can be applied to the strip box paper passing below in the slots.

[0018] Furthermore, there are four spray guns, which are arranged from left to right with an interval of 85mm / 165mm / 85mm. The 1st and 4th spray guns are aimed at the glue points on the sides of the strip box and spray 6 times each. The 2nd and 3rd spray guns are used to spray once each at the two ends of the long side of the strip box.

[0019] Furthermore, the hot melt adhesive assembly bracket also includes: a spray gun cover shell, which is used to cover the spray gun bracket from the top downward, and the side of the spray gun cover shell is provided with a plurality of slots corresponding to the spray gun nozzle and the hose installation position.

[0020] Furthermore, a heat insulation plate is installed between the spray gun bracket and the bottom plate and fixed by bolts to prevent the high temperature of the spray gun from being transmitted to the cigarette pack conveying channel below.

[0021] The working principle and beneficial technical effects of the utility model:

[0022] The utility model discloses a strip box hot melt adhesive spraying system optimized for the C800-BV packaging machine, the core purpose of which is to achieve efficient, accurate and stable hot melt adhesive spraying to meet the strip box bonding requirements on a high-speed packaging line.

[0023] The system stores and heats the hot melt adhesive to a liquid state through the hot melt adhesive cylinder to ensure that the adhesive is in a flow state suitable for spraying. The piston pump built into the adhesive cylinder is located in the adhesive cylinder, which is responsible for pumping the liquid hot melt adhesive to the hose, while maintaining a constant pressure of the adhesive liquid in the hose, ensuring the stability of the glue transmission and the consistency of the spraying. The hose serves as the transmission channel of the hot melt adhesive, transporting the liquid adhesive from the adhesive cylinder and the piston pump to the spray gun module. The entire process is precisely controlled by the PLC controller to ensure timely and appropriate glue supply. The hot melt adhesive spray module integrates multiple horizontally arranged spray guns, each of which is connected to the PLC controller and can be started and stopped according to the preset program, realizing accurate spraying of different parts of the strip box. The spray gun layout is optimized for the bonding points of the strip box to ensure that each key position can be evenly covered with glue. The system integrates monitoring components such as sensors and encoders, and works in conjunction with the PLC through the control circuit to monitor the capacity, pressure, temperature of the glue cylinder and the temperature of the hose in real time to ensure a safe working environment and stable glue performance. In addition, safety interlock mechanisms (such as protective cover closed, glue spray assembly in place) prevent abnormal operation and increase the safety of the system. The setting of the manual mode switch allows automatic detection to be bypassed in certain circumstances, which is convenient for debugging and maintenance. The control circuit bus integrates multiple status signal detection relays to improve the convenience of fault diagnosis and maintenance. The design of the hot melt glue assembly bracket takes into account the convenience of installation and safe isolation of operations. Through the combination of left and right side panels, bottom plate and spray gun bracket, it is not only firmly installed on the packaging machine, but also effectively isolates the heat source through the additional bracket baffle to protect the strip box cardboard from heat, while ensuring that the glue can be sprayed accurately at the predetermined position.

[0024] In summary, this technical solution achieves precise control, efficient operation and safety assurance of the hot melt adhesive spraying process through highly integrated mechanical structure design and intelligent control system, and is particularly suitable for high-efficiency automated packaging production lines. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall connection of the strip box hot melt adhesive spraying system of the utility model;

[0026] Figure 2 It is an exploded diagram of the hot melt adhesive spraying module structure of the utility model;

[0027] Figure 3 It is a schematic diagram of electrical control of the hot melt glue spraying system of the strip box hot melt glue spraying system of the utility model;

[0028] Figure 4 It is a schematic diagram of the electrical control principle of the hot melt glue spraying system of the strip box hot melt glue spraying system of the utility model;

[0029] Figure 5It is a three-dimensional diagram of the hot melt glue spraying module structure of the strip box hot melt glue spraying system of the utility model;

[0030] Figure 6 It is a top view of the hot melt adhesive assembly bracket of the utility model;

[0031] Figure 7 It is a schematic diagram of the points for the hot melt adhesive assembly bracket of the utility model to glue the strip box;

[0032] Figure 8 It is a three-dimensional diagram of the hot melt adhesive assembly bracket of the utility model;

[0033] in:

[0034] 1—C800-BV packaging machine,

[0035] 2—Hot melt adhesive tank,

[0036] 3—Piston pump,

[0037] 4—Hose,

[0038] 5—hot melt adhesive spraying module, 50—hot melt adhesive assembly bracket, 501—left side plate, 502—right side plate, 503—bottom plate, 504—spray gun bracket, 505—left connecting seat, 506—right connecting seat, 507—bracket baffle, 508—spray gun cover, 509—heat insulation board;

[0039] 6—PLC controller,

[0040] 7—Amplifier,

[0041] 8—Strips of box paper. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in combination with specific implementation methods and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the utility model. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the utility model.

[0043] Embodiment 1: A strip box hot melt glue spraying system specially used for C800-BV packaging machine, which comprises: hot melt glue cylinder 2, piston pump 3, hose 4, hot melt glue spraying module 5, PLC controller 6, amplifier 7 and other parts. The hot melt glue spraying system is modified based on C800-BV packaging machine 1, replacing the original cold glue spraying system of the packaging machine: the hot melt glue cylinder 2 and the piston pump 3 heat and pressurize the hot melt glue; the hose 4 is connected to the hot melt glue cylinder 2, heats and maintains the glue temperature and transports it to the spray gun; the spray gun is connected to the hose 4 to complete the hot melt glue spraying; the PLC controller 6 receives the strip box spray gun trigger signal of C800-BV packaging machine 1, and integrates the hot melt glue system control signal and the safety interlock signal for calculation and processing; the amplifier 7 is connected to the PLC controller 6, and its function is to receive the controller instruction to generate the spray gun control signal to control the spray gun spraying.

[0044] The hot melt adhesive cylinder 2 adopts the XM-04-02 Xmelt hot melt adhesive cylinder 2 of Baumer hhs Company of Germany, hereinafter referred to as hhs company. The adhesive cylinder is completely closed and equipped with a two-stage filter to effectively filter carbonized particles and impurities. A capacitive liquid level sensor, a pressure sensor, a temperature sensor and an adhesive pressure regulating module are installed in the adhesive cylinder to monitor the capacity, pressure value, temperature value of the liquid hot melt adhesive in the adhesive cylinder in real time and adjust the pressure of the liquid hot melt adhesive. The electronically controlled piston pump 3 is placed inside the adhesive cylinder to pump the hot melt adhesive melted in the adhesive cylinder to the rubber hose 4 to ensure that the pressure of the adhesive liquid in the rubber hose 4 is constant. The capacity of the adhesive cylinder is 4kg, the heating power is 2100W, the melting efficiency is 4kg / h, and 4 hot melt adhesive hoses 4 and spray guns can be connected. The optimal debugging temperature is 140℃.

[0045] The hot melt adhesive hose 4 is a matching hose 4 from HHS. The hose 4 is connected to the glue cylinder and the spray gun through the glue spray nozzle, and is electronically connected through the connector, and the hot melt adhesive is delivered to the spray gun under the pressure of the piston pump 3. The hose 4 contains a nozzle and hose 4 heating device, a nozzle and hose 4 sensor, etc., which are used to monitor and control the temperature of the hose 4. The hose 4 has a diameter of 45mm. According to the size of the C800-BV body, the length of the hose 4 is designed to be 7m, and the optimal debugging temperature is 150℃.

[0046] The hot melt glue spray gun adopts the latest MFK Tesla pro LV-413 type spray gun of HHS company. Based on the requirements of the strip box gluing process, the original 7 cold glue spray guns are cancelled, and the hot melt glue spray system design adopts a 4-spray gun design. The 4 spray guns are arranged from left to right in sequence, with an interval of 85mm / 165mm / 85mm. The 1st and 4th spray guns realize 6 spraying of the glue points on the side of the strip box paper 8, and the 2nd and 3rd spray guns realize 1 spraying of the long side of the strip box paper 8. Figure 1As shown. Each spray gun module can rotate, and the assembly working position is fixed horizontally in production mode. In maintenance mode, it can be easily disassembled to the maintenance position for maintenance. In view of the maximum production speed of 81 lines / min of C800-BV, the design adopts a 0.3mm spray nozzle, the fastest switching frequency of the spray gun reaches 600HZ, the maximum adhesive pressure is 80Bar, and the maximum glue viscosity can reach 5000mPa·s. The optimal temperature for spray gun debugging is 160℃.

[0047] The spray gun is designed with a special assembly bracket, including a bracket baffle 507, a spray gun bracket 504, a left side plate 501, a right side plate 502, a left connecting seat 505, a right connecting seat 506, a heat insulation plate 509, a bottom plate 503, a spray gun cover 508 and other parts, see Figure 2 . The bracket baffle 507 isolates the hot melt glue spraying system from the strip box conveying system. A groove is opened on it corresponding to the spray gun position. The groove width is designed to be 10mm, so that the hot melt glue can be smoothly sprayed onto the surface of the strip box. The spray gun is fixed on the spray gun bracket 504. The bracket specifications are designed to be 385mm long, 65.5mm wide, and 79mm high. The spray gun on the original cold glue spray system spray gun bracket 504 can be rotated for easy cleaning. The hot melt glue spray system spray gun is relatively clean and does not require frequent maintenance. At the same time, based on the position of its spray gun module, if it continues to rotate, it will wear out the parts. Therefore, the hot melt glue spray system adopts a fixed spray gun bracket 504. The heat insulation board 509 is located below the spray gun bracket 504 and above the bottom plate 503. The three components are fixed by bolts. The heat insulation board 509 mainly plays a heat insulation role to prevent the high temperature of the spray gun from being transmitted to the cigarette pack conveying channel below. The spray gun cover 5089 is fixed to the spray gun bracket 504 by bolts to prevent dust from contaminating the spray gun; the two side panels are fixed to the bottom plate 503 by a connecting seat, and fixed to the baffle by bolts. The baffle, the two side panels and the bottom plate 503 form the external bracket of the spray gun.

[0048] The PLC controller 6, amplifier 7, sensor, encoder, and display screen are connected together to form a complete control circuit. The original host signal and human-machine interface of the C800-BV packaging machine 1 are used for integrated design. The original machine spray gun trigger signal remains unchanged, and the hot melt glue spray system control signal and safety interlock signal are added. The hot melt glue spray system control signal includes the capacity, pressure, and temperature signals of the hot melt glue cylinder 2 and the temperature signal of the hot melt glue hose 4. The pressure and temperature of the hot melt glue system are controlled by PLC to be constant. The safety interlock signal includes the protective cover closing signal, the glue spray assembly position in place signal, and the bypass signal, etc., to ensure the safety of the hot melt glue spray system during operation and maintenance. The electrical control schematic diagram is shown as follows: Figure 3 shown.

[0049] The hot melt adhesive structure assembly is replaced and installed in the original workstation of the C800-BV packaging machine 1 box glue spraying system. The original equipment limits the position of the spray gun bracket 504 through the bottom plate 503, thereby fixing the entire spray gun assembly bracket. The bracket position is adjusted to ensure the gluing process requirements of the box, that is, the 1st and 4th spray guns spray the glue points on the side edges of the box paper 8 6 times each, and the 2nd and 3rd spray guns spray the long sides of the box paper 8 once each.

[0050] The installation height of the original C800-BV cold glue electronic spray system for strip boxes is about 1.6 meters. After changing the installation height of the hot melt glue system glue gun, there will be certain safety hazards for operators to operate according to the original test function and manual function. In the test mode, the hot melt glue will splash when it is sprayed into the glue box by point spraying and line spraying. Considering the characteristics and safety of hot melt glue, the working position of the glue gun is fixed vertically to the strip box paper 8, and the position detection switch is installed. In the test mode, the glue gun needs to be manually adjusted to the test position, and the position detection switch and the automatic and manual switches are installed.

[0051] The electrical control schematic diagram of the hot melt adhesive spraying system is as follows: Figure 4 As shown. PLC input terminal K0 controls the protective cover closing signal, K1 controls the spray gun assembly position signal, K2 controls the Bypass signal, K3-K6 respectively control the glue cylinder position signal, hose 4 position signal, drive shaft phase signal and strip paper 8 position signal, and output terminals Y1-Y4 respectively control the 4 spray gun actions. The hot melt glue spraying system operation modes are divided into automatic operation mode and manual operation mode. When the machine is in normal operation state, the automatic operation mode controls the spray gun signal triggering, and switches to manual operation mode in special operation state to control the spray gun trigger signal. In automatic operation mode, the switch gear is correct, the position detection switch is correct, the glue cylinder temperature is ready, and the liquid level switch is normal. The electronic control outputs the glue cylinder release pump signal and the glue gun control signal, corresponding to Figure 5 , K2 is open, K0, K1, K3-K6 are closed, and PLC output terminals Y1-Y4 are actuated. In manual operation mode, K2 is closed, K0 and K1 safety interlocks are cut off, K3-K6 are closed, and PLC output terminals Y1-Y4 are actuated, so that the glue spraying condition can be manually tested when the safety cover is open and the spray gun assembly is not in place, which is convenient for operation and maintenance.

[0052] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation on the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. In addition, the claims attached to the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the attached claims, or the equivalent forms of such scope and boundaries.

Claims

1. A hot melt adhesive spraying system for strip boxes specially used for C800-BV packaging machine, characterized in that include: The hot melt adhesive cylinder (2) is used to store and heat the hot melt adhesive to melt it into liquid adhesive. The piston pump (3) is placed in the hot melt adhesive cylinder (2) and can pump the hot melt adhesive melted in the cylinder to the rubber hose (4) connected thereto and keep the pressure of the adhesive liquid in the rubber hose (4) constant; A rubber hose (4) is connected at one end to the piston pump (3) and at the other end to the hot melt adhesive spraying module (5), and is electronically connected via a connector, so that the hot melt adhesive is transported to the hot melt adhesive spraying module (5) under the pressure of the piston pump (3); A hot melt glue spraying module (5) is used to integrate and install a plurality of spray guns arranged side by side in a transverse manner, and connect and install the spray guns with the rubber hose (4); each spray gun is connected to a PLC controller (6) and can be controlled by the PLC controller (6) to start and stop spraying glue; A hot melt adhesive assembly bracket (50) is used to fix the hot melt adhesive spraying module (5) and is installed on the glue application station of the C800-BV packaging machine (1); The PLC controller (6) is connected to the hot melt adhesive cylinder (2), the piston pump (3), the rubber hose (4), the hot melt adhesive spraying module (5), and the amplifier (7) through a control circuit, and is used to obtain real-time data of various parts of the system. It can receive a trigger signal of a strip box spray gun of a C800-BV packaging machine (1), and receive a controller instruction through the amplifier (7) to generate a spray gun control signal to control the spray gun to spray glue.

2. The hot melt adhesive spraying system for strip boxes according to claim 1, characterized in that: The hot melt adhesive spraying module (5) has four spray guns which are arranged in a horizontal parallel manner on the hot melt adhesive assembly bracket (50) and are arranged in sequence to align with the positions of the left ear of the strip box bonding, the left point of the strip box bonding edge, the right point of the strip box bonding edge, and the right ear of the strip box bonding.

3. The hot melt adhesive spraying system for strip boxes according to claim 1, characterized in that: The control circuit is connected to a PLC controller (6), an amplifier (7), sensors and encoders installed in a C800-BV packaging machine (1), a hot melt adhesive cylinder (2), an adhesive hose (4), a piston pump (3), and a control display screen installed on an operating table; in: The PLC controller (6) can be connected to the original host signal, original spray gun start signal, control display screen and human-machine operation interface of the C800-BV packaging machine (1) for integrated design. The control circuit also includes a hot melt glue spraying control signal and a safety interlock signal obtained by the sensor, and is connected to a PLC controller (6). The PLC controller (6) is connected to the solenoid valves installed on each spray gun through an amplifier (7), and can control the operation of each solenoid valve to start and stop the glue spraying; The control signal includes the capacity, pressure and temperature signals of the hot melt adhesive cylinder (2) and the temperature signal of the hot melt adhesive hose (4), and can control the pressure and temperature of the hot melt adhesive system to be constant through the PLC; The safety interlock signal includes a protective cover closing signal, a glue spraying assembly position arrival signal and a bypass signal.

4. The hot melt adhesive spraying system for strip boxes according to claim 3, characterized in that: The circuit of each spray gun is also connected to a spray gun in place signal detection relay. The circuit of each spray gun is connected to the control circuit bus. The control circuit bus is also connected to a state signal detection relay for the glue cylinder in place, the rubber hose (4) in place, the transmission shaft phase is correct, the strip box in place, and the protective cover closed signal detection relay; wherein the spray gun in place signal and the protective cover closed signal are safety interlocked connections.

5. The hot melt adhesive spraying system for strip boxes according to claim 4, characterized in that: The control circuit also includes a manual mode switch that bypasses the spray gun and hood detection circuits and accesses the control circuit.

6. The hot melt adhesive spraying system for strip boxes according to claim 1, characterized in that: The hot melt adhesive assembly bracket (50) includes: The left and right side plates (502) are respectively mounted on the two sides of the spray gun bracket (504), the inner side surfaces are used to mount the two ends of the bottom plate (503), and the outer side surfaces are used to be fixedly mounted on the gluing station of the C800-BV packaging machine (1); A bottom plate (503) is horizontally installed between the left and right side plates (502) and is used to install a spray gun bracket (504); The spray gun bracket (504) is installed horizontally on the bottom plate (503) and is used to install the rubber hose (4) and the spray gun. The rubber hose (4) is connected to the inside of the spray gun bracket (504) and is divided into a plurality of branch pipelines respectively connected to each spray gun for conveying hot melt adhesive.

7. The hot melt adhesive spraying system for strip boxes according to claim 6, characterized in that: A left connecting seat (505) and a right connecting seat (506) are installed on both ends of the bottom plate (503), and are installed and fixed to the left side plate (501) and the right side plate (502) by bolts passing through the left connecting seat (505) and the right connecting seat (506); It also includes a support baffle (507) installed longitudinally between the spray gun support (504) and the strip box conveying channel, and is used to isolate the hot melt glue spraying and the strip box paperboard. The support baffle (507) has a slot hole on the plate surface corresponding to the position of each spray gun nozzle, and the hot melt glue can be applied to the strip box paper (8) passing below in the slot hole.

8. The hot melt adhesive spraying system for strip boxes according to claim 6, characterized in that: There are four spray guns, which are arranged from left to right with an interval of 85mm / 165mm / 85mm. The 1st and 4th spray guns are aimed at the glue points on the sides of the strip box and spray 6 times each. The 2nd and 3rd spray guns are used to spray once at each end of the long side of the strip box.

9. The hot melt adhesive spraying system for strip boxes according to claim 6, characterized in that: The hot melt adhesive assembly bracket (50) further comprises: a spray gun cover (508), the spray gun cover (508) being used to cover the spray gun bracket (504) from above, and the spray gun cover (508) is provided with a plurality of slots corresponding to the spray gun nozzle and the installation position of the rubber hose (4) on the side thereof.

10. The hot melt adhesive spraying system for strip boxes according to claim 6, characterized in that: A heat insulation board (509) is installed between the spray gun support (504) and the bottom plate (503) and fixed by bolts to prevent the high temperature of the spray gun from being transmitted to the cigarette bag conveying channel below.

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