Filter of hot melt glue machine and hot melt glue machine

Abstract

The utility model relates to a filter of a hot melt adhesive machine and the hot melt adhesive machine. The filter comprises a shell, a filter element, a scraping plate and a driving part, the shell is mounted in a case of the hot melt glue machine and is provided with a sewage draining exit, a glue feeding pipeline communicated with a glue pump of the hot melt glue machine, a backwashing pipeline and a glue discharging pipeline communicated with a spray gun of the hot melt glue machine; the filter element is arranged in the shell and is communicated with the glue discharging pipeline and the backwashing pipeline, and a glue passing interval communicated with the glue inlet pipeline and the drain outlet is formed between the filter element and the shell; the scraping plate is rotatably arranged in the shell and abuts against the outer surface of the filter element; the driving piece is arranged in the shell and used for driving the scraper to rotate. When the filter element of the hot melt adhesive machine is blocked, the filter element can be subjected to backwashing and impurity scraping through the cooperation of the backwashing pipeline and the scraping plate, the filter element can be effectively cleaned, the filter does not need to be disassembled to be cleaned or replaced without shutdown, the labor intensity of operators can be relieved, and the working efficiency of hot melt adhesive can also be improved.

Description

Technical Field

[0001] The present application relates to the technical field of hot melt adhesive machines, and in particular to a filter of a hot melt adhesive machine and a hot melt adhesive machine. Background Art

[0002] Hot melt glue machine is an automated application equipment used for hot melt glue spraying, scraping, rolling, coating and injecting. It is widely used in household products, automotive industry, air filter, non-woven fabric composite, footwear industry, printing, electronic product assembly, clothing, self-adhesive stickers, packaging industry, coating composite industry, book binding and other industries.

[0003] Hot melt adhesive often carbonizes in the glue machine, forming carbonized impurity particles of hot melt adhesive. To prevent the hot melt adhesive machine from clogging, traditional hot melt adhesive machines often use filters to prevent hot melt adhesive impurities from clogging the spray gun. However, when hot melt adhesive and impurities pass through the filter in the glue machine, impurities adhere to the filter mesh and surface, causing blockage. At this time, the machine needs to be stopped and the filter needs to be disassembled for cleaning or replacement, which increases the labor intensity of the operator and also reduces the operating efficiency of the hot melt adhesive. Summary of the invention

[0004] Based on this, it is necessary to provide a filter for a hot melt adhesive machine and a hot melt adhesive machine to address the above technical problems.

[0005] A filter for a hot melt adhesive machine has a filtering mode and a backwashing mode, including:

[0006] The housing is installed in the chassis of the hot melt adhesive machine and is provided with a sewage outlet, a glue inlet pipe connected to the glue pump of the hot melt adhesive machine, a backwash pipe, and a glue discharge pipe connected to the spray gun of the hot melt adhesive machine;

[0007] A filter element is disposed in the housing and communicated with the glue discharge pipe and the backwash pipe, and a glue passing interval communicating with the glue feed pipe and the sewage outlet is formed between the filter element and the housing;

[0008] a scraper, rotatably disposed in the housing and abutting against an outer surface of the filter element; and

[0009] A driving member, disposed in the housing and used to drive the scraper to rotate;

[0010] In the filtering mode, the glue inlet pipe and the glue discharge pipe are opened, and the sewage outlet and the backwash pipe are closed; in the backwash mode, the glue inlet pipe and the glue discharge pipe are closed, and the sewage outlet and the backwash pipe are opened, and the driving member drives the scraper to rotate.

[0011] In one embodiment, when the pressure of the glue inlet pipeline is less than a preset pressure or the flow rate is greater than a preset flow rate, the filter switches to the filtering mode;

[0012] When the pressure of the glue inlet pipeline is greater than or equal to the preset pressure or the flow rate is less than or equal to the preset flow rate, the filter switches to the backwash mode.

[0013] In one embodiment, the filter further comprises a glue inlet valve disposed on the glue inlet pipe, a backwash valve disposed on the backwash pipe, a glue discharge valve disposed on the glue discharge pipe, and a sewage discharge valve disposed at the sewage discharge port;

[0014] The filter also includes a first detection unit, which is used to detect and send pressure or flow information of the glue feed pipeline, and the pressure or flow information is used to generate different control instructions to control the opening and closing of the glue feed valve, the backwash valve, the glue discharge valve, the sewage valve and the driving member.

[0015] In one of the embodiments, one end of the glue feeding pipe extending into the glue passing interval is arranged horizontally so that a vortex can be formed after the hot melt adhesive is discharged.

[0016] In one embodiment, the housing includes a filter cup and a filter cover, the filter cover is mounted on the filter cup, and the filter cover is configured as a hollow structure for installing the glue inlet pipe, the backwash pipe, the glue discharge pipe and the drive member;

[0017] The filter element is inserted into the filter cup and docked with the filter cover.

[0018] In one of the embodiments, a receiving groove is recessed on one side of the filter cover that is mounted with the filter cup cover, and the filter element is inserted into the receiving groove.

[0019] In one embodiment, a side of the filter cover that is mounted with the filter cup cover is provided with an opening, and the opening extends along the circumference of the filter element;

[0020] The driving member includes a power unit, a rotating shaft and a connecting rod, wherein the power unit is fixedly connected to the filter cover, the rotating shaft is connected to the output end of the power unit and the connecting rod, the connecting rod passes through the opening and is connected to the scraper, wherein the rotating shaft is located above the filter element and is coaxially arranged with the filter element.

[0021] In one of the embodiments, the power unit is disposed on the top of the filter cover and the output end of the power unit is coaxially arranged with the filter element.

[0022] In one embodiment, the power unit is arranged on the side of the filter cover, and the driving member further comprises a transmission unit, and the transmission unit comprises a driving bevel gear and a driven bevel gear;

[0023] The active bevel gear is connected to the output end of the power unit, the driven bevel gear is rotatably disposed in the filter cover and meshes with the active bevel gear, and the rotating shaft is connected to the driven bevel gear.

[0024] A hot melt adhesive machine comprises a chassis, a glue pump, a spray gun and a filter as described in any one of the above items, wherein the glue pump is arranged in the chassis and is connected to the glue inlet pipe and the backwash pipe of the filter, and the spray gun is arranged outside the chassis and is connected to the glue discharge pipe of the filter.

[0025] The filter and hot melt glue machine of the above-mentioned hot melt glue machine, when the hot melt glue machine is in use, the filter is in filtering mode to filter the hot melt glue and prevent the hot melt glue impurities from clogging the spray gun; and when the filter element is clogged, the filter can be switched from filtering mode to backwashing mode, and the filter element can be backwashed and impurities can be scraped off through the cooperation of the backwashing pipe and the scraper, so that the filter element can be effectively cleaned, which can effectively solve the problem of filter element clogging and ensure that the filter can continue to work normally without stopping the machine to disassemble the filter for cleaning or replacing the filter, which can reduce the labor intensity of the operator and improve the operation efficiency of the hot melt glue. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A perspective view of a filter of a hot melt adhesive machine provided in one embodiment of the present application.

[0027] Figure 2 A schematic structural diagram of a hot melt adhesive machine provided in one embodiment of the present application.

[0028] Figure 3 for Figure 1 A schematic diagram of the structure of the filter cover of the provided filter.

[0029] Figure 4 for Figure 3 Bottom view of the provided filter cover.

[0030] The reference numerals in the accompanying drawings are described as follows:

[0031] 10. Filter; 100. Housing; 100a. Drain port; 110. Filter cup; 120. Filter cover; 120a. Receiving groove; 120b. Opening; 200. Filter element; 300. Scraper; 400. Driving member; 410. Power unit; 420. Rotating shaft; 430. Connecting rod; 510. Glue inlet pipe; 520. Backwash pipe; 530. Glue discharge pipe; 610. Glue inlet valve; 620. Backwash valve; 630. Glue discharge valve; 640. Drain valve; 700. First detection unit; 20. Chassis; 30. Glue pump; 40. Spray gun; 50. Control module; 60. Second detection unit. DETAILED DESCRIPTION

[0032] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0033] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0034] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0035] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0036] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0037] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0038] See also Figure 1 In one embodiment of the present application, a filter 10 is provided. The filter 10 can be used in a hot glue machine to filter carbonized impurity particles of hot melt adhesive in the machine case to prevent the hot melt adhesive impurities from clogging the spray gun. Figure 2 As shown, the hot glue machine may include a chassis 20 , a glue pump 30 and a spray gun 40 ; the glue pump 30 is disposed in the chassis 20 and is used to pump the hot melt glue in the chassis 20 into the spray gun 40 located outside the chassis 20 .

[0039] Furthermore, if Figure 1As shown, the filter 10 includes a shell 100, a filter element 200, a scraper 300 and a driving member 400; the shell 100 is installed in the chassis 20 of the hot melt glue machine, and is provided with a drain port 100a, a glue feed pipe 510 connected to the glue pump 30 of the hot melt glue machine, a backwash pipe 520 and a glue discharge pipe 530 connected to the spray gun 40 of the hot melt glue machine; the filter element 200 is arranged in the shell 100 and is connected to the glue discharge pipe 530 and the backwash pipe 520, and a glue passing interval connected to the glue feed pipe 510 and the drain port 100a is formed between the filter element 200 and the shell 100; the scraper 300 is rotatably arranged in the shell 100 and abuts against the outer surface of the filter element 200; the driving member 400 is arranged in the shell 100 and is used to drive the scraper 300 to rotate. Among them, the filter 10 has a filtering mode and a backwashing mode. In the filtering mode, the glue inlet pipe 510 and the glue discharge pipe 530 are opened, and the sewage outlet 100a and the backwashing pipe 520 are closed; in the backwashing mode, the glue inlet pipe 510 and the glue discharge pipe 530 are closed, and the sewage outlet 100a and the backwashing pipe 520 are opened, and the driving member 400 drives the scraper 300 to rotate.

[0040] During the use of the hot melt adhesive machine, the filter 10 is in the filtering mode. In the filtering mode, the adhesive pump 30 pumps the hot melt adhesive in the chassis 20 into the housing 100 through the adhesive inlet pipe 510, and the hot melt adhesive is filtered by the filter element 200 and then sprayed out from the spray gun 40 of the hot melt adhesive machine through the adhesive discharge pipe 530, while the impurities in the hot melt adhesive are trapped in the housing 100 by the filter element 200.

[0041] When the filter 10 is clogged, the filter 10 switches from the filtering mode to the backwashing mode. In the backwashing mode, the glue pump 30 pumps the hot melt glue in the chassis 20 into the interior of the filter element 200 through the backwashing pipe 520, and the hot melt glue flows from the interior of the filter element 200 to the outside through the backwashing effect, washing away the impurities on the filter 10; at the same time, the driving member 400 drives the scraper 300 to rotate, and the scraper 300 can scrape off the impurities on the filter 10 and discharge them from the sewage outlet 100a.

[0042] It can be seen that the filter 10 can filter the hot melt adhesive when the hot melt adhesive machine is in the filtering mode during use to prevent the hot melt adhesive impurities from clogging the spray gun 40; and when the filter element 200 is clogged, the filter 10 can be switched from the filtering mode to the backwashing mode, and the filter element 200 can be backwashed and the impurities can be scraped off through the cooperation of the backwashing pipe 520 and the scraper 300, so as to effectively clean the filter element 200 and effectively solve the problem of the clogging of the filter element 200, thereby ensuring that the filter 10 can continue to work normally without stopping the machine to disassemble the filter 10 for cleaning or replacing the filter 10, which can reduce the labor intensity of the operator and improve the operation efficiency of the hot melt adhesive.

[0043] In some embodiments of the present application, Figure 1As shown, the end of the glue feeding pipe 510 extending into the glue passing interval is horizontally arranged so that the hot melt adhesive can form a vortex after being discharged. After the hot melt adhesive is sprayed out from the glue feeding pipe 510, a vortex can be formed in the housing 100. At this time, large particles and impurities will be centrifuged onto the inner wall of the housing 100 to reduce the filtering burden of the filter element 200.

[0044] In some embodiments of the present application, when the pressure of the glue inlet pipe 510 is less than the preset pressure or the flow rate is greater than the preset flow rate, the filter 10 switches to the filtering mode; when the pressure of the glue inlet pipe 510 is greater than or equal to the preset pressure or the flow rate is less than or equal to the preset flow rate, the filter 10 switches to the backwashing mode. The pressure or flow rate of the glue inlet pipe 510 can be used to determine whether the filter element 200 of the filter 10 is clogged.

[0045] Further, in one embodiment, if Figure 1 As shown, the filter 10 also includes a glue inlet valve 610 arranged on the glue inlet pipe 510, a backwash valve 620 arranged on the backwash pipe 520, a glue discharge valve 630 arranged on the glue discharge pipe 530, and a sewage discharge valve 640 arranged at the sewage outlet 100a; the filter 10 also includes a first detection unit 700, and the first detection unit 700 is used to detect and send pressure or flow information of the glue inlet pipe 510, and the pressure or flow information is used to generate different control instructions to control the opening and closing of the glue inlet valve 610, the backwash valve 620, the glue discharge valve 630, the sewage discharge valve 640 and the driving member 400.

[0046] The first detection unit 700 can be connected with Figure 2 The control module 50 of the hot melt adhesive machine shown in the figure performs signal interaction, and the control module 50 can be electrically connected with the first detection unit 700, the glue inlet valve 610, the backwash valve 620, the glue discharge valve 630, the sewage valve 640 and the driving member 400. When the control module 50 detects that the pressure of the glue inlet pipeline 510 is less than the preset pressure or the flow is greater than the preset flow, it generates a corresponding instruction to control the glue inlet valve 610, the glue discharge valve 630 to open and the sewage valve 640, the backwash valve 620, and the driving member 400 to close; when the control module 50 detects that the pressure of the glue inlet pipeline 510 is greater than or equal to the preset pressure or the flow is less than or equal to the preset flow, it generates a corresponding instruction to control the glue inlet valve 610, the glue discharge valve 630 to close and the sewage valve 640, the backwash valve 620, and the driving member 400 to open. The whole process does not require human operation, which improves the automation of the whole machine.

[0047] The glue inlet pipeline 510 may include a first pipe section, a second pipe section and a third pipe section which are connected in sequence. The first pipe section is horizontally arranged and connected to the outlet of the glue pump 30, the second pipe section is vertically arranged, and the third pipe section is horizontally arranged and extends into the glue passing interval. The first detection unit 700 is arranged on the first pipe section, the glue inlet valve 610 is arranged on the third pipe section, and the backwash pipeline 520 is connected to the first pipe section.

[0048] In some embodiments, Figure 1 As shown, the housing 100 includes a filter cup 110 and a filter cover 120. The filter cover 120 is mounted on the filter cup 110. The filter cover 120 is a hollow structure for installing a glue inlet pipe 510, a backwash pipe 520, a glue discharge pipe 530 and a driving member 400. The filter element 200 is inserted into the filter cup 110 and docked with the filter cover 120. The housing 100 of this structure is simple in structure and is convenient for installing the filter element 200.

[0049] In one embodiment, if Figure 3 and Figure 4 As shown, a receiving groove 120a is also concavely provided on one side of the filter cover 120 that is covered with the filter cup 110, and the filter element 200 is inserted into the receiving groove 120a. The filter element 200 can be installed in the receiving groove 120a by bonding, snap-fitting, threaded connection, etc. As an example, the inner circumference of the receiving groove 120a is provided with threads, and the outer circumference of the filter element 200 is provided with threads that match the threads on the inner circumference of the receiving groove 120a. In order to ensure the sealing performance of the filter element 200, a sealing ring can be provided between the bottom of the receiving groove 120a and the upper end surface of the filter cover 120.

[0050] It should be noted that the bottom of the accommodating groove 120a is provided with a first through hole and a second through hole (not shown in the drawings), the first through hole is used for the backwashing pipe 520 to pass through, and the second through hole is used for the glue discharge pipe 530 to pass through; and the filter cover 120 is provided with a third through hole (not shown in the drawings) on the side where the filter cup 110 is covered, and the third through hole is used for the glue inlet pipe 510 to pass through. In order to ensure the sealing performance of the filter element 200, sealing rings are provided between the inner circumference of the first through hole and the backwashing pipe 520, between the inner circumference of the second through hole and the glue discharge pipe 530, and between the inner circumference of the third through hole and the glue inlet pipe 510.

[0051] Furthermore, in some embodiments, Figure 4 As shown, one side of the filter cover 120 that is covered with the filter cup 110 is provided with an opening 120b, and the opening 120b extends along the circumference of the filter element 200; Figure 1As shown, the driving member 400 includes a power unit 410, a rotating shaft 420 and a connecting rod 430, the power unit 410 is fixedly connected to the filter cover 120, the rotating shaft 420 is connected to the output end of the power unit 410 and the connecting rod 430, the connecting rod 430 is penetrated by an opening 120b and connected to the scraper 300, wherein the rotating shaft 420 is located above the filter element 200 and is arranged coaxially with the filter element 200. Such an arrangement facilitates the driving member 400 to drive the scraper 300 to rotate along the outer surface of the filter element 200. It should be noted that the backwashing pipe 520 and the glue discharge pipe 530 are eccentrically arranged relative to the filter element 200, so that the rotating shaft 420 of the driving member 400 is coaxially arranged with the filter element 200.

[0052] The shape of the connecting rod 430 can be set accordingly according to needs, as long as it can effectively connect the rotating shaft 420 and the scraper 300. For example, the shape of the connecting rod 430 can be a "U" shape with an opening facing the central axis of the filter element 200.

[0053] The number of connecting rods 430 can be set according to the number of scrapers 300, as long as the connecting rods 430 correspond to the scrapers 300. For example, if the number of scrapers 300 is 2, the number of connecting rods 430 is also 2. It is understood that the number of openings 120b on the filter cover 120 should be the same as the number of connecting rods 430.

[0054] In order to ensure the sealing of the filter cup 110, an elastic sealing sheet (not shown in the drawings) may be provided in the opening 120b, and a cutout is provided in the sealing sheet along the rotation direction of the connecting rod 430. The portion of the cutout for the connecting rod 430 to pass through can be opened when squeezed by the connecting rod 430, while the other portion is not squeezed and is in a closed state to ensure the sealing of the sealing sheet. It should be noted that when the connecting rod 430 rotates, the portion of the cutout for the connecting rod 430 to pass through changes and is not the same portion.

[0055] The power unit 410 may be a motor, and may be installed on the top or side of the filter cover 120 .

[0056] like Figure 1 As shown, when arranged on the top of the filter cover 120, the output end of the power unit 410 is coaxially arranged with the filter element 200. This installation method can simplify the structure of the filter 10.

[0057] When arranged at the side of the filter cover 120, the driving member 400 further includes a transmission part (not shown in the drawings), which includes a driving bevel gear and a driven bevel gear; the driving bevel gear is connected to the output end of the power part 410, the driven bevel gear is rotatably arranged in the filter cover 120 and meshes with the driving bevel gear, and the rotating shaft 420 is connected to the driven bevel gear. The power transmission direction of the power part 410 can be changed through the transmission part.

[0058] On the other hand, Figure 2 As shown, an embodiment of the present application further provides a hot melt glue machine, which includes a chassis 20, a glue pump 30, a spray gun 40 and a filter 10 as described in any of the above items, the glue pump 30 is arranged in the chassis 20 and is connected to the glue inlet pipe 510 and the backwash pipe 520 of the filter 10, and the spray gun 40 is arranged outside the chassis 20 and is connected to the glue discharge pipe 530 of the filter 10.

[0059] During the use of the hot melt adhesive machine, the filter 10 is in the filtering mode. In the filtering mode, the adhesive pump 30 pumps the hot melt adhesive in the chassis 20 into the housing 100 through the adhesive inlet pipe 510, and the hot melt adhesive is filtered by the filter element 200 and then sprayed out from the spray gun 40 of the hot melt adhesive machine through the adhesive discharge pipe 530, while the impurities in the hot melt adhesive are trapped in the housing 100 by the filter element 200.

[0060] When the filter 10 is clogged, the filter 10 switches from the filtering mode to the backwashing mode. In the backwashing mode, the glue pump 30 pumps the hot melt glue in the chassis 20 into the interior of the filter element 200 through the backwashing pipe 520, and the hot melt glue flows from the interior of the filter element 200 to the outside through the backwashing effect, washing away the impurities on the filter 10; at the same time, the driving member 400 drives the scraper 300 to rotate, and the scraper 300 can scrape off the impurities on the filter 10 and discharge them from the sewage outlet 100a.

[0061] It can be seen that during the use of the hot melt adhesive machine, the filter 10 can be in the filtering mode to filter the hot melt adhesive and prevent the hot melt adhesive impurities from clogging the spray gun 40; and when the filter element 200 is clogged, the filter 10 can be switched from the filtering mode to the backwashing mode, and through the cooperation of the backwashing pipe 520 and the scraper 300, the filter element 200 can be backwashed and the impurities can be scraped off, so that the filter element 200 can be effectively cleaned, and the problem of filter element 200 being clogged can be effectively solved, ensuring that the filter 10 can continue to work normally without stopping the machine to disassemble the filter 10 for cleaning or replacing the filter 10, which can reduce the labor intensity of the operator and improve the operation efficiency of the hot melt adhesive.

[0062] In some embodiments, Figure 2 As shown, the hot melt adhesive machine further includes a second detection unit 60 disposed on the chassis 20, the second detection unit 60 is used to detect and send the liquid level of the chassis 20, and the control module 50 is used to control whether the glue pump 30 pumps hot melt adhesive into the filter 10 based on the detection content sent by the second detection unit 60. In this way, it can be avoided that the glue pump 30 continues to work when the liquid level in the chassis 20 is too low.

[0063] The control module 50 may be integrated with a display screen and buttons. The display screen may display the liquid level information of the chassis 20 and the pressure or flow information of the glue feed pipe 510. The buttons may be pressed to generate corresponding control instructions. The control module 50 controls the corresponding components accordingly based on the control instructions.

[0064] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0065] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A filter for a hot melt adhesive machine, characterized in that: It has filtering mode and backwashing mode, including: The housing is installed in the chassis of the hot melt adhesive machine and is provided with a sewage outlet, a glue inlet pipe connected to the glue pump of the hot melt adhesive machine, a backwash pipe, and a glue discharge pipe connected to the spray gun of the hot melt adhesive machine; A filter element is disposed in the housing and communicated with the glue discharge pipe and the backwash pipe, and a glue passing interval communicating with the glue feed pipe and the sewage outlet is formed between the filter element and the housing; a scraper, rotatably disposed in the housing and abutting against an outer surface of the filter element; and A driving member, disposed in the housing and used to drive the scraper to rotate; In the filtering mode, the glue inlet pipe and the glue discharge pipe are opened, and the sewage outlet and the backwash pipe are closed; in the backwash mode, the glue inlet pipe and the glue discharge pipe are closed, and the sewage outlet and the backwash pipe are opened, and the driving member drives the scraper to rotate.

2. The filter according to claim 1, characterized in that When the pressure of the glue inlet pipeline is lower than the preset pressure or the flow rate is higher than the preset flow rate, the filter switches to the filtering mode; When the pressure of the glue inlet pipeline is greater than or equal to the preset pressure or the flow rate is less than or equal to the preset flow rate, the filter switches to the backwash mode.

3. The filter according to claim 2, characterized in that The filter further comprises a glue inlet valve arranged on the glue inlet pipe, a backwash valve arranged on the backwash pipe, a glue discharge valve arranged on the glue discharge pipe, and a sewage discharge valve arranged on the sewage discharge port; The filter also includes a first detection unit, which is used to detect and send pressure or flow information of the glue feed pipeline, and the pressure or flow information is used to generate different control instructions to control the opening and closing of the glue feed valve, the backwash valve, the glue discharge valve, the sewage valve and the driving member.

4. The filter according to claim 1, characterized in that One end of the glue feeding pipe extending into the glue passing interval is arranged horizontally so that a swirl can be formed after the hot melt adhesive is discharged.

5. The filter according to any one of claims 1 to 4, characterized in that: The housing comprises a filter cup and a filter cover, wherein the filter cover is mounted on the filter cup, and the filter cover is a hollow structure for mounting the glue inlet pipe, the backwash pipe, the glue discharge pipe and the drive member; The filter element is inserted into the filter cup and docked with the filter cover.

6. The filter according to claim 5, characterized in that A receiving groove is concavely provided on one side of the filter cover that is mounted with the filter cup cover, and the filter element is inserted into the receiving groove.

7. The filter according to claim 5, characterized in that An opening is provided on one side of the filter cover that is mounted with the filter cup cover, and the opening extends along the circumference of the filter element; The driving member includes a power unit, a rotating shaft and a connecting rod, wherein the power unit is fixedly connected to the filter cover, the rotating shaft is connected to the output end of the power unit and the connecting rod, the connecting rod passes through the opening and is connected to the scraper, wherein the rotating shaft is located above the filter element and is coaxially arranged with the filter element.

8. The filter according to claim 7, characterized in that The power unit is arranged on the top of the filter cover and the output end of the power unit is coaxially arranged with the filter element.

9. The filter according to claim 7, characterized in that The power unit is arranged on the side of the filter cover, and the driving member further comprises a transmission unit, and the transmission unit comprises a driving bevel gear and a driven bevel gear; The active bevel gear is connected to the output end of the power unit, the driven bevel gear is rotatably disposed in the filter cover and meshes with the active bevel gear, and the rotating shaft is connected to the driven bevel gear.

10. A hot melt adhesive machine, characterized in that: It comprises a chassis, a glue pump, a spray gun and a filter as described in any one of claims 1 to 9, wherein the glue pump is arranged in the chassis and is connected to the glue inlet pipe and the backwash pipe of the filter, and the spray gun is arranged outside the chassis and is connected to the glue discharge pipe of the filter.

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