Hot melt adhesive dispensing valve

Abstract

The utility model discloses a hot melt adhesive dispensing valve which comprises an adhesive feeding block, a piston rod extending vertically and an adhesive sealing head installed at the lower end of the piston rod, an adhesive guiding block is installed at the lower end of the adhesive feeding block, a sealing block is arranged above the adhesive feeding block, and a lower partition plate, a partition plate and an upper partition plate which are distributed at intervals in the vertical direction are sequentially arranged above the sealing block. The lower partition plate is arranged on the upper surface of the sealing block, a servo driving mechanism is installed on the upper surface of the upper partition plate, a cushion block is arranged between the lower partition plate and the partition plate, at least two metal connecting columns are arranged between the partition plate and the upper partition plate, and a plurality of metal fins are arranged on the outer side of each metal connecting column. The glue opening and closing operation is realized by driving the glue sealing head to reciprocate, and the glue opening and closing speed and sensitivity are improved, so that the precision of glue outlet quantity and the consistency of multiple times of glue outlet quantity are improved, the hot melt glue liquid is ensured to have good flowability, and the reduction of the performance and the shortening of the service life caused by heating of the servo driving mechanism are avoided.

Description

Technical Field

[0001] This utility model relates to the field of dispensing technology, and in particular to a hot melt adhesive dispensing valve. Background Technology

[0002] Photovoltaic modules are a key component of photovoltaic systems. With technological advancements, the applications of photovoltaic modules in various fields are becoming increasingly diverse. During the manufacturing process of photovoltaic modules, a dispensing mechanism is typically used to apply adhesive to the photovoltaic glass, and a specialized adhesive valve controls the dispensing process. Existing adhesive valves use high-pressure gas to control the dispensing flow, resulting in poor control over the amount of high-viscosity adhesive dispensed and the consistency of dispensing across multiple applications. Furthermore, when using hot melt adhesives, heating is usually required to ensure good flowability, but this heating negatively impacts the performance of the drive mechanism. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a hot melt adhesive dispensing valve that improves the speed and sensitivity of dispensing and switching, thereby improving the accuracy of dispensing amount and the consistency of dispensing amount in multiple applications. At the same time, it can ensure that the hot melt adhesive has good fluidity while avoiding the performance degradation and shortened service life of the servo drive mechanism due to heat.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a hot melt adhesive dispensing valve, comprising: an adhesive inlet block, a vertically extending piston rod, and a sealing head installed at the lower end of the piston rod. One end of an adhesive inlet channel opened on the adhesive inlet block is an adhesive inlet located on the side wall of the adhesive inlet block. The other end of the horizontally extending adhesive inlet channel is connected to the upper end of an upper guide hole opened in the adhesive inlet block and extending vertically. An adhesive guide block is installed at the lower end of the adhesive inlet block. A lower guide hole is opened on the vertically extending adhesive guide block, the upper end of which is connected to the lower end of the upper guide hole. The lower end of the lower guide hole extends to the lower end face of the adhesive guide block to form an adhesive outlet.

[0005] The sealing head, located below the dispensing port, has its sealing part embedded in the upper end of the dispensing head. The connecting rod of the sealing head extends upward into the lower guide hole and connects with the piston rod. The outer surfaces of the piston rod and the connecting rod of the sealing head, which pass through the upper guide hole and the lower guide hole in sequence, form a guide channel connecting the inlet and outlet of the dispensing port with the inner walls of the upper guide hole and the lower guide hole. When the sealing head moves to a high position with the piston rod, its sealing part seals with the dispensing port. When the sealing head moves to a low position with the piston rod, a dispensing gap is formed between its sealing part and the dispensing port.

[0006] A sealing block is provided above the glue inlet block. A sealing assembly is provided between the outer surface of the piston rod passing through the upper end of the sealing block and the inner wall of the mounting hole opened on the sealing block. A lower partition, a partition, and an upper partition are arranged vertically spaced above the sealing block. The lower partition is located on the upper surface of the sealing block. A servo drive mechanism is installed on the upper surface of the upper partition. The output shaft of the servo drive mechanism is connected to the upper end of the piston rod for driving the piston rod to move vertically. A pad is provided between the lower partition and the partition. At least two metal connecting posts are provided between the partition and the upper partition. Several metal fins are provided on the outer side of each metal connecting post.

[0007] The following are further improvements to the above technical solution:

[0008] 1. In the above scheme, the lower partition, the partition and the upper partition are all porous vacuum silicon partitions, and the pad is a porous vacuum silicon pad.

[0009] 2. In the above scheme, four metal connecting columns are provided, which are located at the four corners of the partition or the upper partition.

[0010] 3. In the above scheme, the metal fins are spirally wound around the circumferential surface outside the metal connecting column.

[0011] 4. In the above scheme, a guide tube is provided inside the upper guide hole and the lower guide hole and on the outside of the connecting rod of the piston rod and the sealing head. The outer walls of the upper and lower ends of the guide tube are connected to the glue inlet block and the guide block respectively through sealing rings.

[0012] 5. In the above scheme, a mounting groove is formed on the lower surface of the glue inlet block and outside the upper glue guide hole. The upper end of the glue guide block is embedded in this mounting groove and is sealed with the inner wall of the mounting groove by a sealing ring.

[0013] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0014] This utility model relates to a hot melt adhesive dispensing valve. A guide block is installed at the lower end of the glue inlet block. A sealing head, located below the glue outlet, has its sealing portion embedded in the upper end of the dispensing head. The connecting rod of the sealing head extends upward into the lower guide hole and connects to the piston rod. A sealing block is positioned above the glue inlet block. A sealing assembly is installed between the outer surface of the piston rod, whose upper end passes through the sealing block, and the inner wall of the mounting hole on the sealing block. Above the sealing block, a lower partition, a partition, and an upper partition are arranged vertically at intervals. The lower partition is located on the upper surface of the sealing block, and a servo drive mechanism is mounted on the upper surface of the upper partition. The output shaft of this servo drive mechanism is connected to the upper end of the piston rod. The device is used to drive the piston rod to move vertically. A pad is set between the lower and upper partitions, and at least two metal connecting columns are set between the upper and lower partitions. Each metal connecting column has several metal fins on its outer side. The rotary motion is converted into linear motion by the servo drive mechanism to drive the sealing head to move back and forth to realize the dispensing operation, which improves the speed and sensitivity of dispensing, thereby improving the accuracy of dispensing and the consistency of dispensing in multiple applications. It also effectively blocks and dissipates the heat carried by the flowing hot melt adhesive, ensuring that the hot melt adhesive has good fluidity and avoiding the performance degradation and shortened service life of the servo drive mechanism due to heat. Attached Figure Description

[0015] Appendix Figure 1 This is a schematic diagram of the overall structure of the hot melt adhesive dispensing valve of this utility model;

[0016] Appendix Figure 2 This is a partial three-dimensional view of the hot melt adhesive dispensing valve of this utility model;

[0017] Appendix Figure 3 For the appendix Figure 2 A schematic cross-sectional view along the middle AA.

[0018] In the attached diagrams: 1. Dispensing head; 2. Inlet block; 201. Upper guide hole; 202. Mounting groove; 3. Piston rod; 4. Sealing head; 41. Sealing part; 42. Connecting rod part; 51. Inlet; 52. Outlet; 61. Inlet channel; 62. Guide channel; 7. Sealing block; 71. Mounting hole; 72. Sealing assembly; 8. Servo drive mechanism; 9. Guide block; 91. Lower guide hole; 92. Sealing ring; 10. Guide tube; 11. Flange part; 121. Lower partition; 122. Partition; 123. Upper partition; 13. Pad; 131. Viewing window; 14. Metal connecting column; 15. Metal fin. Detailed Implementation

[0019] The present patent can be further understood through the specific embodiments given below, but they are not intended to limit the present patent.

[0020] Example 1: A hot melt adhesive dispensing valve includes: an adhesive inlet block 2, a vertically extending piston rod 3, and a sealing head 4 installed at the lower end of the piston rod 3. An adhesive inlet channel 61 opened on the adhesive inlet block 2 has one end as an adhesive inlet 51 located on the side wall of the adhesive inlet block 2. The other end of the horizontally extending adhesive inlet channel 61 is connected to the upper end of an upper guide hole 201 opened in the adhesive inlet block 2 and extending vertically. An adhesive guide block 9 is installed at the lower end of the adhesive inlet block 2. A lower guide hole 91 is opened on the vertically extending adhesive guide block 9, the upper end of which is connected to the lower end of the upper guide hole 201. The lower end of the lower guide hole 91 extends to the lower end face of the adhesive guide block 9 to form an adhesive outlet 52.

[0021] The sealing head 4, located below the dispensing port 52, has its sealing part 41 embedded in the upper end of the dispensing head 1. The connecting rod part 42 of the sealing head 4 extends upward into the lower guide hole 91 and connects with the piston rod 3. The outer surfaces of the piston rod 3 and the connecting rod part 42 of the sealing head 4, which are sequentially inserted into the upper guide hole 201 and the lower guide hole 91, form a guide channel 62 between the inner walls of the upper guide hole 201 and the lower guide hole 91, connecting the inlet 51 and the outlet 52. When the sealing head 4 moves to a high position with the piston rod 3, its sealing part 41 seals with the outlet 52. When the sealing head 4 moves to a low position with the piston rod 3, a dispensing gap is formed between its sealing part 41 and the outlet 52.

[0022] A sealing block 7 is provided above the glue inlet block 2. A sealing assembly 72 is provided between the outer surface of the piston rod 3, which passes through the upper end of the sealing block 7, and the inner wall of the mounting hole 71 opened on the sealing block 7. A lower partition 121, a partition 122, and an upper partition 123 are arranged vertically at intervals above the sealing block 7. The lower partition 121 is provided on the upper surface of the sealing block 7. A servo drive mechanism 8 is installed on the upper surface of the upper partition 123. The output shaft of the servo drive mechanism 8 is connected to the upper end of the piston rod 3 for driving the piston rod 3 to move vertically. A pad 13 is provided between the lower partition 121 and the partition 122. At least two metal connecting posts 14 are provided between the partition 122 and the upper partition 123. Several metal fins 15 are provided on the outer side of each metal connecting post 14.

[0023] By converting rotary motion into linear motion through a servo drive mechanism, the sealing head is driven to reciprocate to achieve the dispensing operation, thereby improving the speed and sensitivity of dispensing and thus improving the accuracy of dispensing volume and the consistency of dispensing volume in multiple applications.

[0024] The lower partition 121, partition 122 and upper partition 123 are all porous vacuum silicon partitions, and the pad 13 is a porous vacuum silicon pad; four metal connecting posts 14 are provided, which are located at the four corners of the partition 122 respectively; the metal fins 15 are spirally wound around the outer circumferential surface of the metal connecting posts 14.

[0025] A guide tube 10 is provided inside the upper guide hole 201 and the lower guide hole 91 and outside the connecting rod portion 42 of the piston rod 3 and the sealing head 4. The outer walls of the upper and lower ends of the guide tube 10 are connected to the glue inlet block 2 and the guide block 9 respectively through sealing rings.

[0026] An installation groove 202 is provided on the lower surface of the aforementioned glue inlet block 2, located outside the upper glue guide hole 201. The upper end of the glue guide block 9 is embedded in this installation groove 202 and is sealed to the inner wall of the installation groove 202 by a sealing ring 92.

[0027] The aforementioned adhesive channel 62 is formed between the inner wall of the adhesive tube 10 and the connecting rod portion 42 of the piston rod 3 and the sealing head 4. The inner wall of the lower end of the adhesive tube 10 has a radially inward flange portion 11, and the adhesive outlet 52 is formed on the inner side of the flange portion 11. The aforementioned adhesive tube 10 is a metal adhesive tube.

[0028] Example 2: A hot melt adhesive dispensing valve includes: an adhesive inlet block 2, a vertically extending piston rod 3, and a sealing head 4 installed at the lower end of the piston rod 3. An adhesive inlet channel 61 opened on the adhesive inlet block 2 has one end as an adhesive inlet 51 located on the side wall of the adhesive inlet block 2. The other end of the horizontally extending adhesive inlet channel 61 is connected to the upper end of an upper guide hole 201 opened in the adhesive inlet block 2 and extending vertically. An adhesive guide block 9 is installed at the lower end of the adhesive inlet block 2. A lower guide hole 91 is opened on the vertically extending adhesive guide block 9, the upper end of which is connected to the lower end of the upper guide hole 201. The lower end of the lower guide hole 91 extends to the lower end face of the adhesive guide block 9 to form an adhesive outlet 52.

[0029] The sealing head 4, located below the dispensing port 52, has its sealing part 41 embedded in the upper end of the dispensing head 1. The connecting rod part 42 of the sealing head 4 extends upward into the lower guide hole 91 and connects with the piston rod 3. The outer surfaces of the piston rod 3 and the connecting rod part 42 of the sealing head 4, which are sequentially inserted into the upper guide hole 201 and the lower guide hole 91, form a guide channel 62 between the inner walls of the upper guide hole 201 and the lower guide hole 91, connecting the inlet 51 and the outlet 52. When the sealing head 4 moves to a high position with the piston rod 3, its sealing part 41 seals with the outlet 52. When the sealing head 4 moves to a low position with the piston rod 3, a dispensing gap is formed between its sealing part 41 and the outlet 52.

[0030] A sealing block 7 is provided above the glue inlet block 2. A sealing assembly 72 is provided between the outer surface of the piston rod 3, which passes through the upper end of the sealing block 7, and the inner wall of the mounting hole 71 opened on the sealing block 7. A lower partition 121, a partition 122, and an upper partition 123 are arranged vertically at intervals above the sealing block 7. The lower partition 121 is provided on the upper surface of the sealing block 7. A servo drive mechanism 8 is installed on the upper surface of the upper partition 123. The output shaft of the servo drive mechanism 8 is connected to the upper end of the piston rod 3 for driving the piston rod 3 to move vertically. A pad 13 is provided between the lower partition 121 and the partition 122. At least two metal connecting posts 14 are provided between the partition 122 and the upper partition 123. Several metal fins 15 are provided on the outer side of each metal connecting post 14.

[0031] The partitions and metal fins effectively block and dissipate the heat carried by the flowing hot melt adhesive, ensuring good fluidity of the hot melt adhesive while preventing the servo drive mechanism from overheating, which would lead to reduced performance and shortened service life.

[0032] The lower partition 121, partition 122, upper partition 123 and pad 13 are all provided with clearance holes for the piston rod 3 of the servo drive mechanism 8 to pass through; at least one side surface of the pad 13 is provided with a viewing window 131, and the piston rod 3 has an identification protrusion located in the area of ​​the viewing window 131.

[0033] The working principle of this utility model is as follows:

[0034] Hot melt adhesive, which has been treated at high temperature and has fluidity, is injected into the dispensing valve through the inlet 51 by an external adhesive supply unit, such as a pressure plate pump.

[0035] When dispensing is required, the servo drive mechanism rotates and drives the sealing head to move downward, thus moving away from the dispensing port. At this time, a dispensing gap is formed between the sealing part and the dispensing port. The glue enters from the glue inlet, flows along the glue inlet channel and the glue guide channel, and finally flows out from the dispensing gap to achieve dispensing.

[0036] When it is necessary to close the glue, the servo drive mechanism rotates and drives the sealing head to move upward and closer to the glue outlet. At this time, the sealing part completely blocks the glue outlet to close the glue.

[0037] In the above process, the rotary motion is converted into linear motion by the servo drive mechanism to drive the sealing head to move back and forth to realize the dispensing operation, thereby improving the speed and sensitivity of dispensing, thus improving the accuracy of dispensing amount and the consistency of dispensing amount in multiple applications. In addition, the partition and metal fins effectively block and dissipate the heat carried by the flowing hot melt adhesive liquid, ensuring that the hot melt adhesive liquid has good fluidity, and avoiding the performance degradation and shortened service life of the servo drive mechanism due to heat.

[0038] When using the above-mentioned hot melt adhesive dispensing valve, the rotary motion is converted into linear motion through the servo drive mechanism to drive the sealing head to move back and forth to realize the dispensing operation, thereby improving the speed and sensitivity of dispensing, thus improving the accuracy of dispensing amount and the consistency of dispensing amount in multiple applications. It also effectively blocks and dissipates the heat carried by the flowing hot melt adhesive liquid, ensuring that the hot melt adhesive liquid has good fluidity, and avoiding the performance degradation and shortened service life of the servo drive mechanism due to heat.

[0039] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A hot melt glue dispensing valve, comprising: The glue feeding block (2), the vertically extending piston rod (3) and the glue sealing head (4) mounted on the lower end of the piston rod (3), one end of the glue feeding channel (61) opened on the glue feeding block (2) is the glue feeding port (51) on the side wall of the glue feeding block (2), the other end of the horizontally extending glue feeding channel (61) is communicated with the upper end of the vertically extending upper glue guiding hole (201) opened in the glue feeding block (2), characterized in that: the lower end of the glue feeding block (2) is mounted with a glue guiding block (9), a vertically extending glue guiding block (9) is provided with a lower glue guiding hole (91) with the upper end communicated with the lower end of the upper glue guiding hole (201), and the lower end of the lower glue guiding hole (91) extends to the lower end face of the glue guiding block (9) to form the glue outlet (52); The sealing part (41) of the glue sealing head (4) below the glue outlet (52) is embedded into the upper end of the glue feeding head (1), the connecting rod part (42) of the glue sealing head (4) extends upward into the lower glue guiding hole (91) and is connected with the piston rod (3), the outer side surfaces of the piston rod (3) and the connecting rod part (42) of the glue sealing head (4) penetrating the upper glue guiding hole (201) and the lower glue guiding hole (91) in turn form the glue guiding channel (62) communicated with the glue feeding port (51) and the glue outlet (52) between the inner walls of the upper glue guiding hole (201) and the lower glue guiding hole (91), when the glue sealing head (4) moves to the high position with the piston rod (3), the sealing part (41) is sealed with the glue outlet (52), when the glue sealing head (4) moves to the low position with the piston rod (3), the glue outlet gap is formed between the sealing part (41) and the glue outlet (52); The upper part of the glue feeding block (2) is provided with a sealing block (7), the outer side surface of the piston rod (3) penetrating the sealing block (7) is provided with a sealing assembly (72) between the inner wall of the mounting hole (71) opened on the sealing block (7), the upper part of the sealing block (7) is sequentially provided with the lower partition plate (121), the partition plate (122) and the upper partition plate (123) spaced apart in the vertical direction, the lower partition plate (121) is arranged on the upper surface of the sealing block (7), the upper surface of the upper partition plate (123) is mounted with a servo driving mechanism (8), the output shaft of the servo driving mechanism (8) is in transmission connection with the upper end of the piston rod (3) for driving the piston rod (3) to move in the vertical direction, the lower partition plate (121) and the partition plate (122) are provided with a pad block (13), and the partition plate (122) and the upper partition plate (123) are provided with at least two metal connecting columns (14), and the outer side of each metal connecting column (14) is provided with a plurality of metal fins (15).

2. The hot melt glue dispensing valve of claim 1, wherein: The lower partition plate (121), the partition plate (122) and the upper partition plate (123) are all porous vacuum silicon partition plates, and the pad block (13) is a porous vacuum silicon pad block.

3. The hot melt glue dispensing valve of claim 1, wherein: The metal connecting column (14) is provided with four metal connecting columns (14) respectively located at the four corners of the partition plate (122) or the upper partition plate (123).

4. The hot melt glue dispensing valve of claim 1, wherein: The metal fin (15) is spirally wound on the circumferential surface of the outer side of the metal connecting column (14).

5. The hot melt adhesive dispensing valve of claim 1, wherein: The upper glue guide hole (201) and the lower glue guide hole (91) are provided with a glue guide pipe (10) outside the piston rod (3) and the connecting rod part (42) of the glue sealing head (4), and the outer wall of the upper and lower ends of the glue guide pipe (10) is connected with the glue feeding block (2) and the glue guide block (9) through a sealing ring respectively.

6. The hot melt adhesive dispensing valve of claim 1, wherein: The lower surface of the glue feeding block (2) is provided with a mounting groove (202) outside the upper glue guide hole (201), and the upper end of the glue guide block (9) is embedded in the mounting groove (202) and is sealed with the inner wall of the mounting groove (202) through a sealing ring (92).

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