Two-component dispensing valve

Abstract

This utility model discloses a two-component dispensing valve, comprising: an A-component screw valve, a B-component screw valve, a fixed base, a mixing tube, and a dispensing head. The dispensing ports of the A-component screw valve and the B-component screw valve are respectively connected to the upper ends of the A-component flow channels and B-component flow channels located within the fixed base. The lower ends of both the A-component flow channels and the B-component flow channels are connected to the dispensing head via the mixing tube located below the fixed base. The mixing tube and the dispensing head are connected via a guide tube containing a built-in guide channel. When the rotating rod rotates to the 0° position with the drive assembly, the connecting channel within the rotating rod is connected to the guide channel of the guide tube. When the rotating rod rotates to the 90° position, the guide channel between the mixing tube and the dispensing head is closed. This utility model can realize the on / off operation of dispensing during the dispensing process, improving the response speed and dispensing accuracy of repeated on / off dispensing.

Description

Technical Field

[0001] This utility model relates to the field of dispensing technology, and in particular to a two-component dispensing valve. Background Technology

[0002] To achieve better waterproofing and structural bonding performance, two-component adhesives are now widely used in bonding processes for 3C electronics screens, casings, and semiconductor packaging equipment. Two-component adhesives are convenient to store and transport, low in cost, and provide strong bonding. Regarding the dispensing of two-component adhesives, in terms of performance and cost, some methods involve directly assembling the original packaging of the two-component adhesive into the dispensing valve body, where the push rod of the valve body simultaneously pushes the two-component adhesive into the dispensing valve of the mixing device. Other methods involve having the A and B components of the two-component adhesive flow separately into the inlet of a screw pump, where the rotating screw transports the A and B components and ultimately into the mixing device. Current technology involves mixing the adhesive in a mixing tube before dispensing. When dispensing stops, if the pressure in the mixing tube is not released in time, adhesive can easily overflow and drip onto the product, leading to product defects. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a two-component dispensing valve that can realize the on / off operation of dispensing during the dispensing process, thereby improving the response speed and dispensing accuracy of repeated on / off dispensing.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a two-component dispensing valve, comprising: an A-component screw valve, a B-component screw valve, a fixed base, a mixing tube, and a dispensing head. The lower ends of both the A-component screw valve and the B-component screw valve are mounted on the fixed base, and their outlets are correspondingly connected to the upper ends of the A-component flow channels and B-component flow channels respectively opened within the fixed base. The lower ends of both the A-component flow channels and B-component flow channels are connected to the dispensing head through a mixing tube disposed below the fixed base. The glue tube and the dispensing head are connected by a glue guide tube with a built-in glue guide channel. One end of a rotating rod extending perpendicular to the glue guide channel is embedded in the glue guide tube and has a connecting channel corresponding to the glue guide channel. The other end of the rotating rod, which is rotatably configured, is connected to a drive assembly. When the rotating rod rotates to the 0° position with the drive assembly, the connecting channel in the rotating rod is connected to the glue guide channel of the glue guide tube. When the rotating rod rotates to the 90° position, the glue guide channel between the mixing tube and the dispensing head is closed.

[0005] The following are further improvements to the above technical solution: 1. In the above solution, a mounting base is provided on the outer side of the guide tube, and the drive assembly is mounted on the surface of the mounting base opposite to the guide tube.

[0006] 2. In the above scheme, the A-type glue screw valve, the B-type glue screw valve, and the mounting base are all mounted on a mounting bracket.

[0007] 3. In the above scheme, the guide tube is provided with a protective sleeve block fixedly connected to the mounting base on the outside opposite to the mounting base.

[0008] 4. In the above scheme, the dispensing head is installed at the lower end of the sheath block.

[0009] 5. In the above scheme, the driving component is a rotary cylinder or a motor.

[0010] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art: This utility model relates to a two-component dispensing valve. The mixing tube and dispensing head are connected via a guide tube with a built-in adhesive channel. One end of a rotating rod extending perpendicular to the guide channel is embedded in the guide tube and has a corresponding connecting channel. The other end of the rotatable rotating rod is connected to a drive assembly. When the rotating rod rotates to the 0° position with the drive assembly, the connecting channel within the rotating rod connects with the adhesive channel of the guide tube. When the rotating rod rotates to the 90° position, the adhesive channel between the mixing tube and the dispensing head is closed. This allows for the blocking of the adhesive flow near the dispensing head, enabling on / off dispensing operations. It not only blocks the adhesive pressure within the pipe above the dispensing head to prevent overflow when the dispensing is closed, but also improves the response speed and dispensing accuracy during repeated on / off dispensing. Attached Figure Description

[0011] Appendix Figure 1 This is a schematic diagram of the overall structure of the two-component dispensing valve of this utility model; Appendix Figure 2 This is a partial structural cross-sectional view of the two-component dispensing valve of this utility model; Appendix Figure 3 This is a partial enlarged view of the two-component dispensing valve of this utility model; Appendix Figure 4 for Figure 3 A schematic diagram of the exploded structure; Appendix Figure 5 for Figure 4 Cross-sectional view of the structure.

[0012] In the attached diagrams: 1. Dispensing head; 2. Mixing tube; 3. Fixing base; 31. A-adhesive channel; 32. B-adhesive channel; 4. A-adhesive screw valve; 5. B-adhesive screw valve; 6. Guide tube; 61. Guide channel; 7. Rotating rod; 71. Connecting channel; 8. Drive assembly; 81. Drive block; 91. Mounting base; 92. Sheath block; 10. Mounting bracket. Detailed Implementation

[0013] The present patent can be further understood through the specific embodiments given below, but they are not intended to limit the present patent.

[0014] Example 1: A two-component dispensing valve, comprising: an A-component screw valve 4, a B-component screw valve 5, a fixed base 3, a mixing tube 2, and a dispensing head 1. The lower ends of the A-component screw valve 4 and the B-component screw valve 5 are each mounted on the fixed base 3, and their outlets are correspondingly connected to the upper ends of the A-component flow channels 31 and 32 respectively, which are located within the fixed base 3. The lower ends of the A-component flow channels 31 and 32 are connected to the dispensing head 1 via the mixing tube 2 located below the fixed base 3. The mixing tube 2 and the dispensing head 1 are connected by a... A guide tube 6 with a built-in guide channel 61 is connected. One end of a rotating rod 7 extending in a direction perpendicular to the guide channel 61 is embedded in the guide tube 6 and has a connecting channel 71 corresponding to the guide channel 61. The other end of the rotating rod 7 is rotatably connected to a drive assembly 8. When the rotating rod 7 rotates with the drive assembly 8 to the 0° position, the connecting channel 71 in the rotating rod 7 is connected to the guide channel 61 of the guide tube 6. When the rotating rod 7 rotates to the 90° position, the guide channel 61 between the mixing tube 2 and the dispensing head 1 is closed.

[0015] A mounting base 91 is provided on the outer side of the aforementioned guide tube 6, and the aforementioned drive assembly 8 is mounted on the surface of the mounting base 91 opposite to the guide tube 6; the aforementioned A-type screw valve 4, B-type screw valve 5 and mounting base 91 are all mounted on a mounting bracket 10; the aforementioned drive assembly 8 is a rotary cylinder.

[0016] Example 2: A two-component dispensing valve, comprising: an A-component screw valve 4, a B-component screw valve 5, a fixed base 3, a mixing tube 2, and a dispensing head 1. The lower ends of the A-component screw valve 4 and the B-component screw valve 5 are each mounted on the fixed base 3, and their outlets are correspondingly connected to the upper ends of the A-component flow channels 31 and 32 respectively, which are located within the fixed base 3. The lower ends of the A-component flow channels 31 and 32 are connected to the dispensing head 1 via the mixing tube 2 located below the fixed base 3. The mixing tube 2 and the dispensing head 1 are connected by a... A guide tube 6 with a built-in guide channel 61 is connected. One end of a rotating rod 7 extending in a direction perpendicular to the guide channel 61 is embedded in the guide tube 6 and has a connecting channel 71 corresponding to the guide channel 61. The other end of the rotating rod 7 is rotatably connected to a drive assembly 8. When the rotating rod 7 rotates with the drive assembly 8 to the 0° position, the connecting channel 71 in the rotating rod 7 is connected to the guide channel 61 of the guide tube 6. When the rotating rod 7 rotates to the 90° position, the guide channel 61 between the mixing tube 2 and the dispensing head 1 is closed.

[0017] A mounting base 91 is provided on the outer side of the aforementioned adhesive guide tube 6, and the aforementioned drive assembly 8 is mounted on the surface of the mounting base 91 opposite to the adhesive guide tube 6. The aforementioned adhesive guide tube 6 is provided with a protective sleeve block 92 fixedly connected to the mounting base 91 on the outside opposite to the mounting base 91; the aforementioned dispensing head 1 is installed at the lower end of the protective sleeve block 92; the aforementioned driving component 8 is a motor.

[0018] The working principle is as follows: The A-glue screw valve and B-glue screw valve quantitatively feed A-glue and B-glue into the A-glue flow channels and B-glue flow channels within the fixed base. Then, the A-glue and B-glue flowing through the A-glue flow channels and B-glue are mixed via the mixing tube and enter the dispensing head through the guide tube for dispensing. The drive assembly rotates the rotating rod. When the connecting channel on the rotating rod connects with the guide channel of the guide tube, the entire dispensing flow channel is open. When the directions of the connecting channel on the rotating rod and the guide channel are opposite... When vertical, the glue flow channels of the glue guide tubes separated on both sides by the rotating rod are closed, and the entire glue flow channel is closed. This allows for the opening and closing of the glue flow during the dispensing process. Furthermore, a shut-off switch is applied to the glue flow channel near the dispensing head, blocking the glue pressure in the pipe above the dispensing head without releasing the pressure. This prevents glue from overflowing when the glue is closed, avoiding damage to the product and adverse interference with dispensing accuracy. It also improves the response speed and dispensing accuracy when repeatedly opening and closing the glue flow.

[0019] When using the above-mentioned two-component dispensing valve, the glue flow channel can be cut off near the dispensing head to realize the dispensing on / off operation during the dispensing process. This can not only block the glue pressure in the pipe above the dispensing head to prevent glue overflow when the glue is off, but also improve the response speed and dispensing accuracy of repeated dispensing on / off.

[0020] 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 two-component dispensing valve, comprising: The system comprises an A-glue screw valve (4), a B-glue screw valve (5), a fixed base (3), a mixing tube (2), and a dispensing head (1). The lower ends of the A-glue screw valve (4) and the B-glue screw valve (5) are each mounted on the fixed base (3), and the outlets of the A-glue screw valve (4) and the B-glue screw valve (5) are correspondingly connected to the upper ends of the A-glue flow channel (31) and the B-glue flow channel (32) located within the fixed base (3). The lower ends of the A-glue flow channel (31) and the B-glue flow channel (32) are connected to the dispensing head (1) via the mixing tube (2) located below the fixed base (3). The system is characterized in that the mixing tube (2) and the dispensing head (1) are connected by a built-in guide tube. The glue channel (61) is connected to the glue guide tube (6). One end of a rotating rod (7) extending in a direction perpendicular to the glue guide channel (61) is embedded in the glue guide tube (6) and has a connecting channel (71) corresponding to the glue guide channel (61). The other end of the rotating rod (7) is connected to a drive assembly (8). When the rotating rod (7) rotates to the 0° position with the drive assembly (8), the connecting channel (71) in the rotating rod (7) is connected to the glue guide channel (61) of the glue guide tube (6). When the rotating rod (7) rotates to the 90° position, the glue guide channel (61) between the mixing tube (2) and the dispensing head (1) is closed.

2. The two-component dispensing valve according to claim 1, characterized in that: A mounting base (91) is provided on the outside of the guide tube (6), and the drive assembly (8) is mounted on the surface of the mounting base (91) opposite to the guide tube (6).

3. The two-component dispensing valve according to claim 2, characterized in that: The A-type screw valve (4), the B-type screw valve (5), and the mounting base (91) are all mounted on a mounting bracket (10).

4. The two-component dispensing valve according to claim 2, characterized in that: The guide tube (6) is provided with a sheath block (92) fixedly connected to the mounting base (91) on the outside opposite to the mounting base (91).

5. The two-component dispensing valve according to claim 4, characterized in that: The dispensing head (1) is installed at the lower end of the sheath block (92).

6. The two-component dispensing valve according to claim 1, characterized in that: The drive component (8) is a rotary cylinder or a motor.

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