Hot melt adhesive discharging device

Abstract

The utility model relates to the technical field of hot melt adhesive discharging devices, in particular to a hot melt adhesive discharging device which comprises an adhesive inlet pipe, an adhesive discharging chamber and a plurality of adhesive discharging columns, the adhesive inlet pipe is located above the adhesive discharging chamber and fixedly connected with the adhesive discharging chamber, an adhesive inlet hole is formed in the top of the adhesive discharging chamber, the adhesive inlet pipe is communicated with the adhesive discharging chamber through the adhesive inlet hole, and the adhesive discharging columns are arranged on the adhesive discharging chamber. The glue outlet columns are evenly arranged at the bottom of the glue outlet chamber, a plurality of storage cavities are formed in the glue outlet chamber, the heating pieces are arranged in the storage cavities, and the heating pieces extend out of the storage cavities to be arranged on the peripheries of the glue outlet columns in a sleeving mode to heat the glue outlet columns. The heating piece is arranged in the storage cavity in a telescopic mode, the heating piece extends out of the storage cavity and is arranged on the periphery of the glue outlet column in a sleeving mode, the glue outlet column is heated, glue can be discharged smoothly, meanwhile, glue solidified in the glue outlet column can be melted, the glue remaining in the glue outlet column is extracted out through the negative pressure suction pump and recycled into the glue barrel, and the glue discharging efficiency is improved. The technical problems of unsmooth glue discharge and blockage of the glue discharge column are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of hot melt adhesive dispensing devices, and particularly relates to a hot melt adhesive dispensing device. Background Art

[0002] Hot melt adhesive is a plastic adhesive, which is solid at room temperature and undergoes physical state changes with the increase of temperature, becoming a liquid with a certain viscosity; due to its large bonding strength and fast bonding and cooling speed, it is widely used in many industries such as packaging, household appliances, automobiles, textiles, etc., so the hot melt adhesive dispensing device is widely used.

[0003] In the prior art, for example, the Chinese utility model patent with the publication number CN216125991U discloses a hot melt adhesive machine dispensing device, which includes a workbench, a movable frame and a dispensing box. By installing a feed pipe at the top of the dispensing box, a heat conducting plate is installed inside, heaters are installed on both sides of the bottom of the heat conducting plate, and a dispensing head is arranged at the bottom of the dispensing box. The hot melt adhesive particles are added into the dispensing box through the feed pipe, and the heaters heat the heat conducting plate, which will melt the hot melt adhesive particles in contact with the heat conducting plate and discharge them through the dispensing head for use.

[0004] The above scheme fully melts the hot melt adhesive particles by using heaters, improving the working efficiency of the hot melt adhesive machine. When in use, since the dispensing head is in contact with the external environment and is prone to cooling, the dispensing is not smooth enough. When not in use, the remaining colloid will also solidify on the dispensing head, causing the problem of blocking the dispensing head. Summary of the Utility Model

[0005] The purpose of the utility model is to solve the problems that when in use, the dispensing head is in contact with the external environment and is prone to cooling, resulting in insufficiently smooth dispensing, and when not in use, the remaining colloid will also solidify on the dispensing head, causing blockage of the dispensing head.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] The utility model provides a hot melt adhesive dispensing device, which includes a feed pipe, a dispensing chamber and a plurality of dispensing columns. The feed pipe is located above the dispensing chamber and is fixedly connected to the dispensing chamber. A feed hole is arranged at the top of the dispensing chamber, and the feed pipe is communicated with the dispensing chamber through the feed hole. The plurality of dispensing columns are evenly arranged at the bottom of the dispensing chamber. A plurality of storage cavities are arranged in the dispensing chamber, and the storage cavities are arranged corresponding to the dispensing columns. Heating sheets are arranged in the storage cavities, and the heating sheets extend out of the storage cavities and are sleeved on the outer periphery of the dispensing columns, and the heating sheets heat the dispensing columns.

[0008] Further, one end of the glue outlet column close to the glue outlet chamber is set to be cylindrical, and the glue outlet nozzle of the glue outlet column is set to be inverted conical.

[0009] Further, a plurality of the storage cavities are arranged at the bottom inside the glue outlet chamber, the storage cavities are arranged around the outer periphery of the glue outlet column, and the heating sheet is telescopically arranged in the storage cavity.

[0010] Further, a plurality of sealing blocks with the same height as the storage cavity are also arranged at intervals at the bottom inside the glue outlet chamber, and the sealing blocks are in close fit with the storage cavity.

[0011] Further, an automatic control device is arranged at the bottom of the glue outlet chamber and on one side of the glue outlet column, and the automatic control device is used to control the telescopic movement of the heating sheet.

[0012] Further, the automatic control device controls the heating sheet to extend out of the storage cavity and be in close fit with the glue outlet column, so as to realize the heating of the glue outlet column by the heating sheet.

[0013] Further, the heating sheet is set to be two pieces, and the two heating sheets form a cylindrical shape around the glue outlet column.

[0014] Further, a hose connector is arranged at the top of the glue inlet pipe, the glue inlet pipe is connected to the lower end of the glue bucket through the hose connector, and the hot melt adhesive in the glue bucket enters the glue outlet chamber through the glue inlet pipe.

[0015] Further, a negative pressure suction pump is also included. When cleaning the glue outlet column, one end of the negative pressure suction pump is connected to the glue outlet nozzle for sucking out the residual colloid in the glue outlet column, and the other end is connected to the upper end of the glue bucket.

[0016] Further, a plurality of glue suction nozzles corresponding to the glue outlet nozzle are arranged on the negative pressure suction pump.

[0017] The beneficial effects of the present utility model are as follows:

[0018] By arranging a heating sheet outside the glue outlet column, the present utility model heats the glue outlet column, which is convenient for the hot melt adhesive to flow out of the glue outlet column, improves the fluidity of glue outlet, and can also melt the colloid solidified in the glue outlet column. When cleaning the glue outlet column, one end of the negative pressure suction pump is connected to the glue outlet nozzle of the glue outlet column, and the other end is connected to the glue bucket. The negative pressure suction pump is used to suck out the residual colloid in the glue outlet column and recycle it to the glue bucket, avoiding the blockage of the glue outlet column and the waste of hot melt adhesive, and being convenient for use.

[0019] Other features and advantages of the present utility model will be described in the subsequent specification, and in part, will become apparent from the specification, or will be understood by implementing the present utility model. The objectives and other advantages of the present utility model can be achieved and obtained through the structures pointed out in the specification, claims, and drawings. Brief Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0021] Figure 1 Shows a reference diagram of the overall state of the hot melt adhesive dispensing device in the embodiment of the present utility model;

[0022] Figure 2 Shows a partial cross-sectional structural diagram of the hot melt adhesive dispensing device in the embodiment of the present utility model;

[0023] Figure 3 Shows a bottom view structural diagram of the heating sheet of the hot melt adhesive dispensing device in the embodiment of the present utility model located in the storage cavity.

[0024] In the figure: 1, feed pipe; 2, dispensing chamber; 3, dispensing column; 4, storage cavity; 5, heating sheet; 6, dispensing nozzle; 7, sealing block; 8, automatic control device; 9, hose connector; 10, glue bucket; 11, negative pressure suction pump; 12, glue suction nozzle. Detailed Description of the Embodiments

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some of the embodiments of the present utility model, rather than all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present utility model.

[0026] It should be noted that in the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to the present utility model; the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, unless otherwise clearly specified and defined, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0027] Embodiment

[0028] As Figures 1-3 shown, the present utility model provides a hot melt adhesive dispensing device, which includes a glue inlet pipe 1, a glue outlet chamber 2 and a plurality of glue outlet columns 3. The glue inlet pipe 1 is located above the glue outlet chamber 2 and is fixedly connected to the glue outlet chamber 2. The top of the glue outlet chamber 2 is provided with a glue inlet hole, and the glue inlet pipe 1 is communicated with the glue outlet chamber 2 through the glue inlet hole. A plurality of the glue outlet columns 3 are evenly arranged at the bottom of the glue outlet chamber 2. A plurality of storage cavities 4 are arranged in the glue outlet chamber 2, and the storage cavities 4 are arranged corresponding to the glue outlet columns 3. A heating sheet 5 is arranged in the storage cavity 4, and the heating sheet 5 extends out of the storage cavity 4 and sleeves the outer periphery of the glue outlet column 3. The heating sheet 5 heats the glue outlet column 3.

[0029] As Figure 2 and Figure 3 shown, one end of the glue outlet column 3 close to the glue outlet chamber 2 is set as a cylindrical shape, and the glue outlet nozzle 6 of the glue outlet column 3 is set as an inverted conical shape. A plurality of the storage cavities 4 are arranged at the bottom inside the glue outlet chamber 2. The storage cavity 4 is set as a semi-circular shape, and the accommodating cavity formed inside is matched with the heating sheet 5. The storage cavities 4 are arranged around the outer periphery of the glue outlet column 3, and the heating sheet 5 is telescopically arranged in the storage cavity 4. A plurality of sealing blocks 7 with the same height as the storage cavity 4 are also arranged at intervals at the bottom inside the glue outlet chamber 2. The sealing blocks 7 are in close fit with the storage cavity 4 to prevent the hot melt adhesive from forming a blockage in the glue outlet chamber 2.

[0030] Preferably, an automatic control device 8 is provided at the bottom of the glue discharging chamber 2 and on one side of the glue discharging column 3. The automatic control device 8 is used to control the expansion and contraction of each heating sheet 5. When the heating sheet 5 heats the glue discharging column 3, press the automatic control device 8, and the automatic control device 8 controls the heating sheet 5 to extend out of the storage cavity 4 and closely fit with the glue discharging column 3 to heat the glue discharging column 3. Preferably, two heating sheets 5 are provided. The two heating sheets 5 form a cylinder around the glue discharging column 3 to heat the glue discharging column 3 in all directions, with a better heating effect and smooth glue discharging. When not in use, press the automatic control device 8 again, and the automatic control device 8 controls the heating sheet 5 to contract upward into the storage cavity 4.

[0031] Preferably, a hose connector 9 is provided at the top of the glue inlet pipe 1. The glue inlet pipe 1 is connected to the lower end of the glue bucket 10 through the hose connector 9. The hot melt adhesive in the glue bucket 10 enters the glue discharging chamber 2 through the glue inlet pipe 1 and then flows out through the glue discharging column 3 for use.

[0032] Preferably, the hot melt adhesive discharging device further includes a negative pressure suction pump 11. When cleaning the glue discharging column, one end of the negative pressure suction pump 11 is connected to the glue discharging nozzle 6, and the other end is connected to the upper end of the glue bucket 10. When the hot melt adhesive discharging device is not in use, there will be residual glue in the glue discharging column 3, which blocks the glue discharging column 3. Press the automatic control device 8 to control the heating sheet 5 to extend out of the storage cavity to heat the glue discharging column 3 and melt the residual glue solidified in the glue discharging column 3. At the same time, connect the negative pressure suction pump 11 to the glue discharging nozzle 6 to suck out the residual glue in the glue discharging column 3 and recycle it into the glue bucket 10 to avoid waste and facilitate next use. Preferably, a plurality of glue suction nozzles 12 corresponding to the glue discharging nozzle 6 are provided on the negative pressure suction pump 11, which is convenient for cleaning all the glue discharging columns 3 at the same time, saving time and cost.

[0033] Preferably, a connecting rod is further provided in the glue inlet pipe 1. Two symmetrically arranged semi-circular plates are movably connected to the connecting rod. The diameter of the circular plate formed by combining the two semi-circular plates is the same as the diameter of the glue inlet pipe. A switch button for controlling the connecting rod is provided on one side outside the glue inlet pipe. The switch button is used to control the up and down opening and closing movement of the two semi-circular plates on the connecting rod. When starting to use, press the switch button, and the two semi-circular plates on the connecting rod rotate downward along the connecting rod by a certain degree and overlap in the vertical direction. The hot melt adhesive in the glue bucket 10 enters the glue discharging chamber 2 through the glue inlet pipe 1. When not in use, press the switch button again, and the two semi-circular plates on the connecting rod rotate upward along the connecting rod by a certain degree to form a circular plate matching the glue inlet pipe 1, so as to prevent the hot melt adhesive in the glue bucket 10 from entering the glue discharging chamber 2.

[0034] The working principle of the utility model is as follows:

[0035] During use, the glue inlet pipe 1 is connected to the lower end of the glue bucket 10 through the glue pipe connector 9. When the switch button is pressed, the two semi-circular plates on the connecting rod rotate downward by 90 degrees along the connecting rod and overlap in the vertical direction. The hot melt adhesive in the glue bucket 10 enters the glue outlet chamber 2 through the glue inlet pipe 1. When the automatic control device 8 is pressed, the heating sheet 5 is controlled to extend out of the storage cavity 4 and closely fit with the glue outlet column 3. The two heating sheets 5 form a cylinder around the glue outlet column 3 to heat the glue outlet column 3 in all directions, with better heating effect, facilitating the outflow of the hot melt adhesive through the glue outlet column 3 and improving the smoothness of glue outlet. When the use is stopped, the switch button is pressed again, and the two semi-circular plates on the connecting rod rotate upward along the connecting rod to form a circular plate matching the glue inlet pipe, so as to prevent the hot melt adhesive in the glue bucket 10 from entering the glue outlet chamber 2. When the automatic control device 8 is pressed, the heating sheet 5 is controlled to contract upward into the storage cavity 4. When using again, the automatic control device 8 is pressed to control the heating sheet 5 to extend out of the storage cavity 4 to heat the glue outlet column 3, and the residual colloid solidified in the glue outlet column 3 is melted. At the same time, one end of the negative pressure suction pump 11 is connected to the glue outlet nozzle 6 through the glue suction nozzle 12, and the other end is connected to the upper end of the glue bucket 10, which is used to pump out the residual colloid in the glue outlet column 3 and recycle it into the glue bucket 10 to avoid blockage of the glue outlet column 3 and waste of the hot melt adhesive, and is convenient for reuse.

[0036] It should be noted that the structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those skilled in this technology to understand and read, and are not used to limit the limited conditions that can be implemented in this application. Therefore, they do not have technical essential significance. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that this application can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in this application.

[0037] Although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A hot melt adhesive dispensing device, characterized in that, It includes a glue inlet pipe (1), a glue outlet chamber (2) and several glue outlet columns (3). The glue inlet pipe is located above the glue outlet chamber and fixedly connected to the glue outlet chamber. The top of the glue outlet chamber (2) is provided with a glue inlet hole, and the glue inlet pipe (1) communicates with the glue outlet chamber (2) through the glue inlet hole. The several glue outlet columns (3) are evenly arranged at the bottom of the glue outlet chamber (2). Several storage cavities (4) are arranged in the glue outlet chamber (2), and the storage cavities (4) are arranged corresponding to the glue outlet columns (3). A heating sheet (5) is arranged in the storage cavity (4), and the heating sheet (5) extends out of the storage cavity (4) and is sleeved on the outer periphery of the glue outlet column (3). The heating sheet (5) heats the glue outlet column (3).

2. The hot melt adhesive discharging device according to claim 1, characterized in that, One end of the glue outlet column (3) close to the glue outlet chamber is cylindrical, and the glue outlet nozzle (6) of the glue outlet column (3) is conical.

3. A hot melt adhesive dispensing device according to claim 1, characterized in that, The several storage cavities (4) are arranged at the bottom inside the glue outlet chamber (2), the storage cavities (4) are arranged around the outer periphery of the glue outlet column (3), and the heating sheet (5) is telescopically arranged in the storage cavity (4).

4. A hot melt adhesive dispensing device according to claim 3, wherein Several sealing blocks (7) with the same height as the storage cavity (4) are also arranged at intervals at the bottom inside the glue outlet chamber (2), and the sealing blocks (7) are closely attached to the storage cavity (4).

5. The hot melt adhesive dispensing device according to claim 4, wherein, An automatic control device (8) is arranged at the bottom of the glue outlet chamber (2) and on one side of the glue outlet column (3), and the automatic control device (8) is used to control the telescopic movement of the heating sheet (5).

6. The hot melt adhesive dispensing device according to claim 5, characterized in that, The automatic control device (8) controls the heating sheet (5) to extend out of the storage cavity (4) and be closely attached to the glue outlet column (3).

7. The hot melt adhesive dispensing device according to claim 1, wherein The heating sheet (5) is arranged in two pieces, and the two heating sheets (5) form a cylinder around the glue outlet column (3).

8. A hot melt adhesive dispensing device according to claim 1, characterized in that, A hose connector (9) is arranged at the top of the glue inlet pipe (1), and the glue inlet pipe (1) is connected to the lower end of a glue bucket (10) through the hose connector (9). The hot melt adhesive in the glue bucket (10) enters the glue outlet chamber (2) through the glue inlet pipe (1).

9. The hot melt adhesive dispensing device according to claim 8, characterized in that, It further includes a negative pressure suction pump (11). When cleaning the glue outlet column (3), one end of the negative pressure suction pump (11) is connected to the glue outlet nozzle (6) to extract the residual colloid in the glue outlet column (3), and the other end is connected to the upper end of the glue bucket (10).

10. A hot melt adhesive dispensing device according to claim 9, characterized in that, A plurality of glue suction nozzles (12) corresponding to the glue outlet nozzle (6) are arranged on the negative pressure suction pump (11).

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