CN215354360U - Pneumatic driving dispensing needle with impeller - Google Patents
Pneumatic driving dispensing needle with impeller Download PDFInfo
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- CN215354360U CN215354360U CN202120671322.4U CN202120671322U CN215354360U CN 215354360 U CN215354360 U CN 215354360U CN 202120671322 U CN202120671322 U CN 202120671322U CN 215354360 U CN215354360 U CN 215354360U
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Abstract
The utility model relates to a pneumatic driving dispensing needle with an impeller. The dispensing needle comprises a dispensing needle cavity, an impeller fixing groove is formed in the inner wall of the dispensing needle cavity, an impeller is mounted in the impeller fixing groove, a fixing shaft is arranged in the center of the impeller, and two ends of the fixing shaft are fixed to the inner wall of the dispensing needle cavity; one end of the dispensing needle cavity is connected with pneumatic dispensing equipment, the other end of the dispensing needle cavity is connected with a dispensing needle head, and a grid plate is arranged at a glue outlet of the dispensing needle head; the number of the impeller fixing grooves is more than or equal to two. The pneumatic driving dispensing needle provided by the utility model is internally provided with at least two impeller structures, so that the instability caused by driving liquid by gas is overcome. In addition, the impeller is driven by the flow to generate torsional inertia, so that instability caused by instantaneous drive of a pneumatic or peristaltic pump can be avoided, the glue outlet amount is controlled by the inertial drive of the impeller, the suck-back phenomenon is prevented, and the problem of poor packaging reliability caused by uneven glue dispensing is solved.
Description
Technical Field
The utility model relates to a pneumatic driving dispensing needle with an impeller, and belongs to the field of semiconductor device packaging.
Background
The adhesive dispensing and chip mounting packaging is a common process for packaging semiconductor chips, and at present, mature schemes are more, and common adhesive dispensing equipment is roughly classified into mechanical adhesive dispensing, electrical adhesive dispensing, pneumatic adhesive dispensing and the like in principle. The mechanical dispensing structure is complex, the cost is high, and the mechanical dispensing structure is not popularized in low-cost product application. The electric driving dispensing precision is moderate, the application is wide, but the cost is still high, and most of the low-cost products currently use pneumatic driving as power. However, the pneumatic driving can generate turbulence due to unstable laminar flow and suck back phenomenon caused by other peristaltic dispensing, which causes non-uniform dispensing, thereby affecting the reliability of packaging.
Chinese patent document CN211678550U discloses a dispensing needle head, including a dispensing needle tube, the one end of the dispensing needle tube is connected with a glue outlet device, and the other end of the dispensing needle tube is provided with a port, the port is connected with an end cap by a thread, and the end cap fixes a glue outlet tube concentrically arranged with the end cap on the port. But the dispensing needle head of the patent still has uneven dispensing in the using process.
Meanwhile, the packaging of the adhesive dispensing patch is not limited to an LED or an LD semiconductor laser. With the technological progress, the microchip has the advantages of small volume, light weight, high conversion efficiency, long service life, high reliability and the like, and is gradually expanded in the fields of communication, medical treatment, display, industrial manufacture, security and the like. How to reduce the cost is not only a pursuit of interest in the industry, but also a limiting factor on whether semiconductor chip products can be rapidly expanded.
In view of this, it is necessary to design a dispensing needle with low cost and uniform dispensing.
Disclosure of Invention
Aiming at the defects of the prior art, the utility model provides a pneumatic driving dispensing needle with an impeller. The glue dispensing needle overcomes the defect of unstable glue dispensing amount of the pneumatic peristaltic glue dispenser, and can greatly improve the glue dispensing consistency.
The technical scheme of the utility model is as follows:
a pneumatic driving dispensing needle with an impeller comprises a dispensing needle cavity, wherein an impeller fixing groove is formed in the inner wall of the dispensing needle cavity, the impeller is installed in the impeller fixing groove, a fixing shaft is arranged in the center of the impeller, and two ends of the fixing shaft are fixed on the inner wall of the dispensing needle cavity; one end of the dispensing needle cavity is connected with pneumatic dispensing equipment, the other end of the dispensing needle cavity is connected with a dispensing needle head, and a grid plate is arranged at a glue outlet of the dispensing needle head; the number of the impeller fixing grooves is more than or equal to two.
According to the utility model, the middle of the impeller fixing groove is a circular groove, the diameter of the circular groove is the same as that of the impeller, and the two sides of the circular groove form an angle of 30-45 degrees with the inner wall of the dispensing needle cavity.
According to the utility model, the impeller is preferably spherical and has the same diameter as the inner diameter of the cavity of the glue dispensing needle.
According to the present invention, preferably, the dispensing needle cavity and the dispensing needle are connected through a hose, and further preferably, the hose is a PVC hose.
According to the present invention, the shape of the glue outlet includes, but is not limited to, square, rectangle, circle or diamond.
According to the utility model, the diameter of the mesh grid plate is 0.2-0.3 mm, and the shape of the mesh grid plate corresponds to the shape of the glue outlet.
When the pneumatic dispensing device is used, one end of the dispensing needle cavity is connected with the pneumatic dispensing device, the other end of the dispensing needle cavity is connected with the dispensing needle head, liquid glue of the pneumatic dispensing device is opened and flows into the dispensing needle cavity in sequence, flows to the dispensing needle head through the impeller structure and flows out from the glue outlet according to requirements, and dispensing is finished.
The utility model has the beneficial effects that:
1. the pneumatic driving dispensing needle provided by the utility model is internally provided with at least two impeller structures, and when the fluid is driven by quantitative air pressure and the liquid pressure is ensured to be balanced, the volume of the passing flow in unit time is the same, so that the change of the sectional area causes the change of the flow speed. The impeller structures are mutually matched, the liquid glue flow rate in the cavity of the glue dispensing needle which just flows into the impeller structures can be accelerated, the liquid glue flow rate of the needle head which flows towards the glue dispensing needle is slowed down, the transmission of the pressure of the balance gas on the liquid is stable, and therefore the instability generated by the gas driving liquid is overcome. In addition, the impeller is driven by the flow to generate torsional inertia, so that instability caused by instantaneous drive of a pneumatic or peristaltic pump can be avoided, the glue outlet amount is controlled by the inertial drive of the impeller, the suck-back phenomenon is prevented, and the problem of poor packaging reliability caused by uneven glue dispensing is solved.
2. The point glue needle head and the point glue needle cavity in the pneumatic driving point glue needle provided by the utility model are of split structures, so that the worn scrapped point glue needle can be conveniently and independently replaced, the replacement of parts with impeller microstructures is avoided, and the point glue needle heads with different glue outlets can be prepared according to specific requirements aiming at the common package of a semiconductor LED chip and an LD chip.
3. According to the pneumatic driving dispensing needle provided by the utility model, the grid plate is arranged at the glue outlet, and compared with direct opening dispensing, the grid plate can enable glue to be layered and more uniform.
Drawings
FIG. 1 is a schematic view of the overall structure of a pneumatic driving dispensing needle with an impeller according to the present invention;
FIG. 2 is a cross-sectional view of the pneumatically driven dispensing needle with impeller of the present invention;
FIG. 3 is a top view of the pneumatically driven dispensing needle with impeller of the present invention;
FIG. 4 is a schematic view of a grid panel of the present invention;
in the figure, 1, a dispensing needle cavity; 2. dispensing a needle head; 3. an impeller fixing groove; 4. an impeller; 5. a mesh grid plate; 6. and a glue outlet.
Detailed Description
The utility model is further illustrated by the following examples and figures. But is not limited thereto.
Example 1
As shown in fig. 1 to 4, a pneumatic driving dispensing needle with an impeller comprises a dispensing needle cavity 1, wherein an impeller fixing groove 3 is formed in the inner wall of the dispensing needle cavity 1, a spherical impeller 4 is installed in the impeller fixing groove 3, a fixing shaft is arranged in the center of the impeller 4, and two ends of the fixing shaft are fixed on the inner wall of the dispensing needle cavity 1; one end of the dispensing needle cavity 1 is connected with pneumatic dispensing equipment, the other end of the dispensing needle cavity is connected with a dispensing needle head 2, and a glue outlet 6 of the dispensing needle head 2 is provided with a mesh grid plate 6; the number of the impeller fixing grooves 3 is two.
The middle of the impeller fixing groove 3 is a circular groove, the diameter of the circular groove is the same as that of the impeller 4, and the two sides of the circular groove are 45 degrees to the inner wall of the dispensing needle cavity 1.
The diameter of the impeller 4 is the same as the inner diameter of the dispensing needle cavity 1, the dispensing needle cavity 1 is connected with the dispensing needle head 2 through a PVC hose, the dispensing opening 6 is square, and the mesh diameter of the mesh grid plate 5 is 0.3 mm.
When the pneumatic dispensing device is used, one end of a dispensing needle cavity 1 is connected with pneumatic dispensing equipment, the other end of the dispensing needle cavity is connected with a dispensing needle head 2, liquid glue of the pneumatic dispensing equipment is opened and flows into the dispensing needle cavity 1 in sequence, flows to the dispensing needle head through an impeller 4 structure and flows out from a glue outlet 6 as required, and dispensing is finished.
Example 2
The pneumatic driving dispensing needle with the impellers is structurally as described in embodiment 1, and is different in that the number of the impeller fixing grooves 3 is four.
Example 3
A pneumatic driving dispensing needle with an impeller is structurally as described in embodiment 1, except that the mesh diameter of the mesh grid plate 5 is 0.3 mm.
Claims (6)
1. A pneumatic driving dispensing needle with an impeller is characterized by comprising a dispensing needle cavity, wherein an impeller fixing groove is formed in the inner wall of the dispensing needle cavity, the impeller is installed in the impeller fixing groove, a fixing shaft is arranged at the center of the impeller, and two ends of the fixing shaft are fixed on the inner wall of the dispensing needle cavity; one end of the dispensing needle cavity is connected with pneumatic dispensing equipment, the other end of the dispensing needle cavity is connected with a dispensing needle head, and a grid plate is arranged at a glue outlet of the dispensing needle head; the number of the impeller fixing grooves is more than or equal to two.
2. The pneumatic driving dispensing needle with the impeller as claimed in claim 1, wherein the middle of the impeller fixing groove is a circular groove, the diameter of the circular groove is the same as that of the impeller, and the two sides of the circular groove are 30-45 degrees to the inner wall of the dispensing needle cavity.
3. The pneumatically driven dispensing needle with an impeller as claimed in claim 1, wherein said impeller is spherical and has the same diameter as the inner diameter of the dispensing needle chamber.
4. The pneumatically driven dispensing needle with an impeller of claim 1 wherein said dispensing needle chamber and dispensing needle are connected by a hose.
5. The pneumatically driven dispensing needle with an impeller of claim 1 wherein the shape of said dispensing opening includes but is not limited to a square, rectangle, circle or diamond.
6. The pneumatic driving dispensing needle with the impeller as claimed in claim 1, wherein the mesh diameter of the mesh grid plate is 0.2-0.3 mm, and the shape of the mesh grid plate corresponds to the shape of the dispensing opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120671322.4U CN215354360U (en) | 2021-04-01 | 2021-04-01 | Pneumatic driving dispensing needle with impeller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120671322.4U CN215354360U (en) | 2021-04-01 | 2021-04-01 | Pneumatic driving dispensing needle with impeller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215354360U true CN215354360U (en) | 2021-12-31 |
Family
ID=79625757
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120671322.4U Active CN215354360U (en) | 2021-04-01 | 2021-04-01 | Pneumatic driving dispensing needle with impeller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215354360U (en) |
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2021
- 2021-04-01 CN CN202120671322.4U patent/CN215354360U/en active Active
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