Dispensing head cleaning mechanism

Abstract

The present application aims to provide a point head cleaning mechanism which is simple in structure, reasonable in design, good in cleaning effect and capable of effectively solving the problem of residual glue sputtering. The present application comprises a cleaning mounting seat, a glue passing vertical hole is formed in the cleaning mounting seat, a plurality of glue pipe joints are arranged at the upper end of the cleaning mounting seat, a plurality of glue blowing holes are formed at the upper end of the glue passing vertical hole, one end of the glue pipe joint is connected with a gas source and the other end is connected with the glue blowing hole through an internal gas path formed in the cleaning mounting seat, a glue receiving box is arranged below the glue passing vertical hole, the glue blowing hole is arranged obliquely and the included angle A between the central axis of the glue blowing hole and the central axis of the glue passing vertical hole is an acute angle, a first filtering sponge is detachably arranged at the lower end of the cleaning mounting seat, and the first filtering sponge is located between the glue passing vertical hole and the glue receiving box. The present application is applied to the technical field of cleaning mechanisms.

Description

Technical Field

[0001] This invention relates to the technical field of cleaning mechanisms, and particularly to a dispensing head cleaning mechanism. Background Technology

[0002] Dispensing devices are widely used in manufacturing and are an important component of automated production. Generally, the dispensing head of a dispensing device needs to be cleaned of residual adhesive after dispensing to improve dispensing accuracy. However, with technological advancements, cleaning of the dispensing head has long been replaced by cleaning systems that handle manual labor.

[0003] Dispensing head cleaning mechanisms generally fall into two categories: one uses cleaning cloths or sponges to wipe the dispensing head for cleaning, and the other uses air jets to remove residual adhesive from the dispensing head without contact. Both can achieve residual adhesive removal, but the former requires a sufficient quantity of wiping materials and generates waste material after wiping, which directly contacts the dispensing head and can affect its accuracy. Therefore, the non-contact residual adhesive cleaning mechanism using air jets is more favored by businesses.

[0004] Chinese invention patent application CN 104785472 A discloses a dispensing needle cleaning device, which includes a fixed base, an adhesive box, and a jet cleaning unit. The jet cleaning unit is mounted on the fixed base and has a cleaning through hole for inserting the dispensing needle. The bottom of the cleaning through hole is connected to the adhesive box, and the top of the cleaning through hole is connected to a jet inlet hole, which is connected to an air source. During cleaning, the dispensing needle is inserted into the cleaning through hole, and then the gas ejected from the air source enters the cleaning through hole through the jet inlet hole, blowing away the residual adhesive on the dispensing needle and achieving cleaning.

[0005] Although the aforementioned patent application can achieve cleaning of the dispensing head, it still has the following shortcomings: the gas sprayed into the cleaning through hole has no directional guidance. During cleaning, the gas is blown directly towards the dispensing needle. In particular, when the air path is sprayed out at a 90° vertical direction, residual glue may fly out from above the cleaning through hole and scatter everywhere, causing adverse effects. After the residual glue leaves the dispensing needle, it is sprayed down at high speed with the airflow, directly impacting the glue box or easily causing glue splashing. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a dispensing head cleaning mechanism that is simple in structure, reasonable in design, has good cleaning effect and can effectively solve the problem of residual glue splashing.

[0007] The technical solution adopted in this invention is as follows: This invention includes a cleaning mounting base, in which a glue-passing vertical hole is formed. Several air pipe connectors are provided at the upper end of the cleaning mounting base. Several glue-blowing holes are formed at the upper end of the glue-passing vertical hole. One end of each air pipe connector is connected to an external air source, and the other end is connected to the glue-blowing hole through an internal air passage formed inside the cleaning mounting base. A glue-receiving box is provided below the glue-passing vertical hole. The glue-blowing hole is inclined, and the angle A between its central axis and the central axis of the glue-passing vertical hole is an acute angle. A first filter sponge is detachably provided at the lower end of the cleaning mounting base, and the first filter sponge is located between the glue-passing vertical hole and the glue-receiving box.

[0008] Furthermore, the cleaning mounting base includes a fixed base and a mounting upper base disposed on the fixed base. The fixed base has a glue dispensing vertical cavity in the middle, and the mounting upper base has an embedded through hole. A sealing block is disposed at the lower end of the mounting upper base. A cleaning cylinder is sleeved in the embedded through hole. A fixing plate is disposed at the upper end of the cleaning cylinder and connected to the mounting upper base. The lower end of the cleaning cylinder passes through the mounting upper base and the sealing block and is located in the glue dispensing vertical cavity. The glue passing vertical hole is opened in the middle of the cleaning cylinder. The glue blowing hole is opened on the cleaning cylinder. The diameter of the cleaning cylinder is smaller than the diameter of the embedded through hole and forms an air inlet space with the cooperation of the sealing block and the fixing plate. The air pipe connector is disposed on the mounting upper base. The internal air passage is connected to the air inlet space, and the air inlet of the glue blowing hole is connected to the air inlet space.

[0009] Furthermore, the sealing block has a through hole that is adapted to the cleaning cylinder, and a sealing ring is provided inside the through hole. The cleaning cylinder passes through the through hole and the sealing ring.

[0010] Furthermore, the upper end of the fixing plate is provided with an upper rounded corner groove, which surrounds the glue-passing vertical hole, and the lower end of the sealing block is provided with a lower rounded corner groove, which surrounds the cleaning cylinder.

[0011] Furthermore, three embedding slots are provided through both sides of the lower end of the glue dispensing vertical cavity. The three embedding slots are arranged sequentially from top to bottom. The first filter sponge is embedded in the two upper embedding slots, the glue receiving box is embedded in the two lower embedding slots, and the second filter sponge is embedded in the two middle embedding slots.

[0012] Furthermore, the number of the glue blowing holes is nine, which are distributed in a circumferential array of three in a group on the cleaning cylinder.

[0013] Furthermore, there are two tracheal connectors, which are respectively located on the front and rear sides of the mounting base.

[0014] Furthermore, the glue blowing hole is horizontally positioned and its central axis intersects perpendicularly with the central axis of the glue-passing vertical hole. The cleaning mounting base is also provided with an air source connector for an external air source. The cleaning mounting base is provided with a negative pressure air path. The lower end of the glue-passing vertical hole is provided with a vacuum forming chamber. One end of the negative pressure air path is connected to the air source connector, and the other end of the negative pressure air path is inclined downward and communicates with the vacuum forming chamber.

[0015] The beneficial effects of this invention are as follows: When cleaning the dispensing head, the dispensing head is inserted into the glue-passing vertical hole. Then, the external air source is activated, and a high-speed airflow is blown into the glue-passing vertical hole through the air pipe connector, the internal air passage, and the glue-blowing hole. Since the glue-blowing hole is inclined downward, the airflow direction is inclined downward, thereby blowing the residual glue on the dispensing head from top to bottom, preventing the residual glue from flying upward and splashing everywhere. The blown-off residual glue falls at high speed along the glue-passing vertical hole with the airflow and is then caught and absorbed by the first filter sponge. Due to the material and water absorption of the first filter sponge, it can effectively prevent the residual glue from directly hitting the glue receiving box and causing splashing. The first filter sponge can also seep out the residual glue and drip it onto the glue receiving box, thereby enabling continuous operation. As can be seen from the above, the present invention has a simple overall structure. By using inclined holes to guide the airflow, residual glue splashing is avoided. The design is reasonable, and the non-contact airflow jet cleaning of the dispensing head ensures the accuracy of the dispensing head while having a good cleaning effect. In addition, the splashing of residual glue when it falls is also absorbed by the sponge, which effectively solves the problem of residual glue splashing. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural schematic diagram of Embodiment 1 of the present invention; Figure 2 This is an exploded view of Embodiment 1 of the present invention; Figure 3 This is a cross-sectional view of Embodiment 1 of the present invention; Figure 4 This is a cross-sectional view of the cleaning cylinder described in Embodiment 1 of the present invention; Figure 5 This is a cross-sectional view of Embodiment 2 of the present invention. Detailed Implementation

[0017] Example 1 like Figures 1 to 4As shown, in this embodiment, the present invention includes a cleaning mounting base 1. The cleaning mounting base 1 has a vertical adhesive-filling hole 2 for inserting an adhesive dispensing head to facilitate cleaning. Air pipe connectors 3 are provided on both sides of the upper end of the cleaning mounting base 1. The outer end of each air pipe connector 3 is connected to an air source to obtain airflow. Multiple adhesive blowing holes 4 are provided at the upper end of the vertical adhesive-filling hole 2. An internal air passage 5 is provided inside the cleaning mounting base 1. One end of the internal air passage 5 is connected to the inner end of the air pipe connector 3, and the other end is connected to the adhesive blowing holes 4, thus forming a complete air passage: air source - pipe - air pipe connector 3 - internal air passage 5 - adhesive blowing hole 4 - vertical adhesive-filling hole 2. An adhesive receiving box 6 is located at the lower end of the cleaning mounting base 1 and at the vertical adhesive-filling hole 2. Directly below, it is used to catch residual glue that falls after cleaning; the glue blowing hole 4 is inclined from top to bottom and from outside to inside, and the angle A between its central axis and the central axis of the glue-passing vertical hole 2 is an acute angle. The angle A is 30° to 60°, and the optimal angle is 45°. Therefore, when the external air source is started, the airflow will be blown into the glue-passing vertical hole 2 from top to bottom under the guiding effect of the glue blowing hole 4, thereby cleaning the inserted glue head; the lower end of the cleaning mounting base 1 is detachably provided with a first filter sponge 7. The first filter sponge 7 is located between the glue-passing vertical hole 2 and the glue receiving box 6, so that it can catch the falling residual glue and play a buffering role. At the same time, its adsorption can effectively prevent splashing, and after adsorbing the residual glue, it can also seep out and finally drip onto the glue receiving box 6. Therefore, when cleaning the dispensing head, the dispensing head is inserted into the glue-passing vertical hole 2. Then, the external air source is activated, and a high-speed airflow passes through the air pipe connector 3, the internal air passage 5, and the glue-blowing hole 4 into the glue-passing vertical hole 2. Since the glue-blowing hole 4 is inclined downward, the airflow direction is inclined downward, thereby blowing the residual glue on the dispensing head from top to bottom, preventing the residual glue from flying upward and splashing everywhere. The blown-off residual glue falls at high speed along the glue-passing vertical hole 2 with the airflow, and is then caught and absorbed by the first filter sponge 7. Due to the material and water absorption of the first filter sponge 7, it can effectively prevent the residual glue from directly falling onto the glue-receiving box 6 and causing splashing. The first filter sponge 7 can also seep out the residual glue and drip it onto the glue-receiving box 6, thereby enabling continuous operation. As can be seen from the above, the present invention has a simple overall structure. By using inclined holes to guide the airflow, residual glue splashing is avoided. The design is reasonable, and the non-contact airflow jet cleaning of the dispensing head ensures the accuracy of the dispensing head while having a good cleaning effect. In addition, the splashing of residual glue when it falls is also absorbed by the sponge, which effectively solves the problem of residual glue splashing.

[0018] In this embodiment, the cleaning mounting base 1 includes a fixed base 8 and a mounting upper base 9. The mounting upper base 9 is fixed to the fixed base 8 with screws. The fixed base 8 has a glue dispensing vertical cavity 10 in the middle, which is vertically continuous. The mounting upper base 9 has an embedded through hole 11, which is vertically continuous. A sealing block 12 is fixedly installed at the lower end of the mounting upper base 9 with screws. The upper end of the cleaning cylinder 13 is provided with a fixing plate 14. The cleaning cylinder 13 is sleeved in the embedded through hole 11 and fixedly connected to the mounting upper base 9 through the fixing plate 14. After connection, the fixing plate 14 can also play a sealing role. The lower end of the cleaning cylinder 13 passes through the mounting upper base 9 and the sealing block 12 and is located in the glue dispensing vertical cavity 10. The sealing block 12 is used to seal the embedded through hole 11, thereby making the embedded through hole 11 airtight. Hole 2 is formed in the middle of the cleaning cylinder 13, extending vertically through the cleaning cylinder 13 for insertion of the dispensing head. The blowing hole 4 is also formed on the cleaning cylinder 13. The diameter of the cleaning cylinder 13 is smaller than the diameter of the embedded through hole 11, so there is a gap between the cleaning cylinder 13 and the embedded through hole 11. This gap forms an air inlet space 15 with the cooperation of the sealing block 12 and the fixing plate 14. Due to the sealing effect of the fixing plate 14 and the sealing block 12, the air inlet space 15 has good airtightness. The air pipe connector 3 is set on the mounting base 9. The internal air passage 5 is connected to the air inlet space 15 so that airflow can be blown into the air inlet space 15 to pressurize the air inlet space 15. The air inlet of the blowing hole 4 is connected to the air inlet space 15, so that airflow can enter and exit the glue-passing vertical hole 2 from the blowing hole 4. The air inlet space 15, as an independent space, can evenly distribute the airflow when an external air source blows in the airflow, so that each of the glue blowing holes 4 can output air evenly, thus ensuring the cleaning effect.

[0019] In this embodiment, the sealing block 12 has a through hole 16, which is adapted to the cleaning cylinder 13. A sealing ring 17 is disposed inside the through hole 16, and the cleaning cylinder 13 passes through the through hole 16 and the sealing ring 17. The through hole 16 is used for the passage of the cleaning cylinder 13 and is adapted to the cleaning cylinder 13. The sealing ring 17 is disposed inside the through hole 16, thereby achieving a seal between the cleaning cylinder 13 and the sealing ring 17, so as to ensure the airtightness of the air inlet space 15.

[0020] In this embodiment, the upper end of the fixing plate 14 is provided with an upper rounded corner groove 18, which surrounds the glue-feeding vertical hole 2. The lower end of the sealing block 12 is provided with a lower rounded corner groove 19, which surrounds the cleaning cylinder 13. The upper rounded corner groove 18 serves as a guide, facilitating smoother insertion of the glue dispensing head. The lower rounded corner groove 19 provides clearance, allowing the lower end of the cleaning cylinder 13 to protrude from the lower end face of the sealing block 12, preventing residual glue from splashing and adhering to the sealing block 12.

[0021] In this embodiment, three embedding slots 20 are provided through both sides of the lower end of the glue dispensing vertical cavity 10. The three embedding slots 20 are arranged sequentially from top to bottom. The first filter sponge 7 is embedded in the two upper embedding slots 20, the glue receiving box 6 is embedded in the two lower embedding slots 20, and the second filter sponge 21 is embedded in the two middle embedding slots 20. The six embedding slots 20 are distributed in groups of three on both sides of the glue dispensing vertical cavity 10 and are symmetrical in pairs. Therefore, they can be used to install the first filter sponge 7, the second filter sponge 21, and the glue receiving box 6. Furthermore, the detachable embedded installation allows for convenient operation.

[0022] In this embodiment, there are nine glue-blowing holes 4, arranged in a circular array of three on the cleaning cylinder 13. The number of glue-blowing holes 4 can be set according to actual needs. In this embodiment, there are nine glue-blowing holes 4, arranged in a circular array of three around the central axis of the glue-passing vertical hole 2, so as to uniformly clean the glue dispensing head and ensure cleaning effect. To improve cleaning efficiency, the glue-blowing holes 4 can also be tilted in one direction, such as counterclockwise. In this case, the airflow blown out by the glue-blowing holes 4 can form a vortex airflow, enhancing the cleaning effect.

[0023] Example 2 like Figure 5 As shown, in this embodiment, the glue blowing hole 4 is horizontally arranged and its central axis intersects perpendicularly with the central axis of the glue passing vertical hole 2. The cleaning mounting base 1 is also provided with an air source connector 51 for connecting an external air source. The cleaning mounting base 1 is provided with a negative pressure air passage 52. The lower end of the glue passing vertical hole 2 is provided with a vacuum forming chamber. One end of the negative pressure air passage 52 is connected to the air source connector 51, and the other end of the negative pressure air passage 52 is inclined downward and communicates with the vacuum forming chamber.

[0024] During cleaning, the airflow enters the negative pressure air passage 52 through the air source connector 51, and then blows downwards towards the vacuum forming chamber. Since the dispensing head is inserted into the glue passage vertical hole 2, it obstructs the ventilation efficiency of the glue passage vertical hole 2. Furthermore, the airflow blown out by the negative pressure air passage 52 is much greater than the ventilation efficiency of the glue passage vertical hole 2. Due to the Venturi effect, the airflow in the glue passage vertical hole 2 is attracted downwards, thereby causing the residual glue blown off by the glue blowing hole 4 to fall downwards and preventing it from flying upwards and splashing.

[0025] Although the embodiments of the present invention are described with reference to actual solutions, they do not constitute a limitation on the meaning of the present invention. Modifications to the embodiments and combinations with other solutions based on this specification will be obvious to those skilled in the art.

Claims

1. A dispensing head cleaning mechanism, comprising a cleaning mounting base (1), wherein a dispensing vertical hole (2) is provided in the cleaning mounting base (1), a plurality of air pipe connectors (3) are provided at the upper end of the cleaning mounting base (1), a plurality of glue blowing holes (4) are provided at the upper end of the dispensing vertical hole (2), one end of the air pipe connector (3) is connected to an external air source and the other end is connected to the glue blowing holes (4) through an internal air passage (5) provided inside the cleaning mounting base (1), and a glue receiving box (6) is provided below the dispensing vertical hole (2), characterized in that: The glue blowing hole (4) is inclined and the angle A between its central axis and the central axis of the glue passing vertical hole (2) is an acute angle. The lower end of the cleaning mounting base (1) is detachably provided with a first filter sponge (7). The first filter sponge (7) is located between the glue passing vertical hole (2) and the glue receiving box (6). The cleaning mounting base (1) is also provided with an air source connector (51) for connecting an external air source. The cleaning mounting base (1) is provided with a negative pressure air passage (52). The lower end of the glue passing vertical hole (2) is provided with a vacuum forming chamber (53). One end of the negative pressure air passage (52) is connected to the air source connector (51), and the other end of the negative pressure air passage (52) is inclined downward and connected to the vacuum forming chamber (53).

2. The dispensing head cleaning mechanism according to claim 1, characterized in that: The cleaning mounting base (1) includes a fixed base (8) and a mounting upper base (9) disposed on the fixed base (8). The fixed base (8) has a glue dispensing vertical cavity (10) in the middle. The mounting upper base (9) has an embedded through hole (11). A sealing block (12) is disposed at the lower end of the mounting upper base (9). A cleaning cylinder (13) is fitted inside the embedded through hole (11). A fixing plate (14) is disposed at the upper end of the cleaning cylinder (13) and connected to the mounting upper base (9). The lower end of the cleaning cylinder (13) passes through the mounting upper base (9) and the sealing block (12). The glue outlet is located in the glue outlet vertical cavity (10). The glue passage vertical hole (2) is opened in the middle of the cleaning cylinder (13). The glue blowing hole (4) is opened on the cleaning cylinder (13). The diameter of the cleaning cylinder (13) is smaller than the diameter of the embedded through hole (11) and forms an air inlet space (15) with the cooperation of the sealing block (12) and the fixing plate (14). The air pipe connector (3) is set on the mounting seat (9). The internal air passage (5) is connected to the air inlet space (15). The air inlet of the glue blowing hole (4) is connected to the air inlet space (15).

3. The dispensing head cleaning mechanism according to claim 2, characterized in that: The sealing block (12) has a through hole (16) that is adapted to the cleaning cylinder (13). A sealing ring (17) is provided inside the through hole (16), and the cleaning cylinder (13) passes through the through hole (16) and the sealing ring (17).

4. The dispensing head cleaning mechanism according to claim 2, characterized in that: The upper end of the fixed plate (14) is provided with an upper rounded corner groove (18), which surrounds the glue vertical hole (2). The lower end of the sealing block (12) is provided with a lower rounded corner groove (19), which surrounds the cleaning cylinder (13).

5. The dispensing head cleaning mechanism according to claim 2, characterized in that: The lower end of the glue dispensing vertical cavity (10) is provided with three embedded through slots (20) on both sides. The three embedded through slots (20) are arranged from top to bottom. The first filter sponge (7) is embedded in the two embedded through slots (20) on the upper layer, the glue receiving box (6) is embedded in the two embedded through slots (20) on the lower layer, and the second filter sponge (21) is embedded in the two embedded through slots (20) on the middle layer.

6. The dispensing head cleaning mechanism according to claim 2, characterized in that: The number of the blowing holes (4) is nine, and they are arranged in a circular array of three on the cleaning cylinder (13).

7. The dispensing head cleaning mechanism according to claim 2, characterized in that: The number of the air pipe connectors (3) is two, and the two air pipe connectors (3) are respectively located on the front and rear sides of the mounting base (9).

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