Dispensing valve with double piezoelectric ceramics

Abstract

The utility model provides a double piezoelectric ceramic dispensing valve, which relates to the technical field of microelectronic packaging, and comprises a dispensing valve main body and a glue supply pipe, the inner wall of the dispensing valve main body is provided with a glue inlet channel, the bottom of the glue supply pipe is fixedly provided with a lower glue pipe, one side of the dispensing valve main body is fixedly provided with a derivative member, and the bottom of the lower glue pipe is fixed with the top of the derivative member. The problem that when a double piezoelectric ceramic dispensing valve is used, a user encounters large operation noise due to the fact that used glue is doped with many bubbles, the bubbles can be brought into the dispensing valve along with flowing of the glue, and the glue cannot be discharged out of the dispensing valve is solved by installing a miniature vacuum pump. The existence of bubbles can cause the change and instability of hydrodynamic force, the instability can cause pressure fluctuation when the glue is quickly released, so that obvious noise is generated, the noise not only influences the operation environment and reduces the user experience, but also in some precise application occasions, the occurrence of the noise is regarded as a mark of abnormal operation, and the influence of the noise on the operation environment and the user experience is reduced. Therefore, the working efficiency and the product quality are influenced.

Description

Technical Field

[0001] This utility model relates to the field of microelectronic packaging technology, and in particular to a dual piezoelectric ceramic dispensing valve. Background Technology

[0002] The dual piezoelectric ceramic dispensing valve is a high-precision dispensing device that uses the piezoelectric effect to control the precise spraying of fluid. Primarily used in the electronic packaging industry, it meets the increasingly precise dispensing needs of the semiconductor manufacturing and packaging sectors. As electronic products develop towards ultra-miniaturization, high density, and ultra-high integration, the requirements for the precision and speed of dispensing technology are becoming increasingly stringent. With its high precision and rapid response, the dual piezoelectric ceramic dispensing valve plays a crucial role in high-tech industries such as electronic packaging and is expected to see wider application with technological advancements and growing market demand.

[0003] In existing technologies, users often encounter significant operational noise when using dual piezoelectric ceramic dispensing valves. This is because the adhesive itself contains numerous air bubbles, which are formed during adhesive mixing and filling due to chemical changes or physical processes. Furthermore, the supply system experiences air compression during the delivery of adhesive to the dispensing valve. Unstable pressure leads to additional air entering the adhesive, and these air bubbles are carried into the dispensing valve along with the adhesive flow. The presence of these bubbles causes changes and instability in fluid dynamics. This instability causes pressure fluctuations during rapid adhesive release, resulting in noticeable noise. This noise not only affects the operating environment and reduces user experience, but in certain precision applications, such as laboratories or high-precision manufacturing environments, the presence of noise is also considered a sign of abnormal operation, thus impacting work efficiency and product quality. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a dual piezoelectric ceramic dispensing valve.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a dual piezoelectric ceramic dispensing valve, comprising a dispensing valve body and a dispensing tube. The inner wall of the dispensing valve body has an inlet channel. A lower dispensing tube is fixed to the bottom of the dispensing tube. A derivative component is fixed to one side of the dispensing valve body. The bottom of the lower dispensing tube is fixed to the top of the derivative component. A glue chamber is formed in the inner wall of the glue chamber. A partition is fixed to the inner wall of the glue chamber. An air extraction hole is formed on the surface of the partition. A miniature vacuum pump is fixed to the inner wall of the glue chamber. An air outlet is formed on one side of the derivative component. A moving gear is rotatably connected to the inner wall of the derivative component. The moving gear meshes with a rack. A moving plate is fixed to one side of the rack. The moving plate surface has adhesive holes. In existing technology, when using dual piezoelectric ceramic dispensing valves, users often encounter significant operating noise. This is because the adhesive itself contains a large number of air bubbles. These bubbles are formed during adhesive mixing and filling due to chemical changes or physical processes. Furthermore, the feeding system experiences air compression during the adhesive delivery to the dispensing valve. Unstable pressure causes additional air to enter the adhesive, and these air bubbles are carried into the dispensing valve along with the adhesive flow. The presence of these air bubbles leads to changes and instability in fluid dynamics. This instability causes pressure fluctuations during rapid adhesive release, resulting in noticeable noise. Noise, which not only affects the operating environment and reduces user experience, but also serves as a sign of abnormal operation in certain precision applications, such as laboratories or high-precision manufacturing environments, thus impacting work efficiency and product quality. To address this issue, this invention employs a miniature vacuum pump. When production begins, the glue supply tube starts supplying glue to the dispensing valve body. The glue enters the glue tank along the tube. Operators set the maximum glue level in the tank based on actual operating conditions; this maximum level is lower than the suction port. When the glue level reaches its maximum, the moving gear rotates counterclockwise, causing the gear teeth to mesh and drive the rack, thus moving the moving plate. The movable plate covers the entrance to the glue tank, creating a seal. Simultaneously, a miniature vacuum pump is activated, drawing a vacuum into the glue tank. This causes air bubbles in the glue to burst rapidly under vacuum. Then, the moving gear rotates clockwise, allowing glue to continue flowing into the tank and pushing the bubble-free glue into the glue inlet channel. This process is repeated to prevent excessive noise from glue bubbles during operation. When production is finished, the operator can again cover the entrance to the glue tank with the movable plate and activate the miniature vacuum pump in reverse to allow air to enter the glue tank, expelling any remaining glue and preventing it from drying out. This improves user experience and extends the equipment's lifespan.

[0006] Preferably, a top plate is fixed to the top of the dispensing valve body, and a clamping groove is provided on one side of the top plate. A glue supply tube is nested in the inner wall of the clamping groove. In the prior art, when the glue supply tube supplies glue, the constant change of the center of gravity can easily cause the glue supply tube to tilt continuously, resulting in breakage at the interface between the glue supply tube and the lower glue tube, glue leakage, and affecting the use of the equipment. To address this problem, this utility model solves the problem by installing a top plate. When the operator assembles the equipment, the glue supply tube is nested into the clamping groove of the top plate, and the bottom of the top plate is fixed to the top of the dispensing valve body, so that the glue supply tube is fixed. At the same time, the vibration and tilting trends of the glue supply tube are synchronized with the dispensing valve body, preventing the equipment from loosening and achieving the effect of improving the stability of the equipment.

[0007] Preferably, a fixing ring is fixed to the bottom of the lower dispensing tube, and the bottom of the fixing ring is fixed to the top of the derivative component. In the prior art, because the derivative component and the dispensing valve body have a large self-weight, they are more significantly affected by vibration, while the lower dispensing tube has a small self-weight. When the equipment is working, the two are affected by vibration differently, which can cause displacement and loosening, and even lead to the breakage of the lower dispensing tube. To address this problem, this utility model uses the method of installing a fixing ring to solve it. This achieves the goal of limiting the vibration trend between the two by fixing the ring, so that the vibration affects the two synchronously, preventing the components from shifting and loosening, and thus improving the service life of the equipment.

[0008] Preferably, a buffer pad is fixed to the front of the dispensing valve body. The buffer pad provides cushioning for the dispensing valve body during transportation. At the same time, since the dispensing valve body mainly moves along the XY axis, it prevents the dispensing valve body from colliding with the equipment and improves the service life of the equipment.

[0009] Preferably, the air extraction hole is oriented at a 220-degree angle to the bottom of the inner wall of the glue tank. This increased tilt angle increases the height required for glue overflow, prevents glue from entering the micro vacuum pump due to vacuum, and improves equipment stability.

[0010] Preferably, the diameter of the glue hole is equal to the inner diameter of the fixing ring to prevent the glue from becoming blocked or flowing too fast due to the difference in diameter when passing through the glue hole, thereby improving the uniformity of glue dispensing.

[0011] Preferably, a rubber ring is fixed to the top of the fixing ring to improve the sealing between the fixing ring and the lower rubber tube, while reducing the impact of vibration on both and improving the equipment's performance.

[0012] Beneficial effects

[0013] 1. In existing technologies, users often encounter significant operational noise when using dual piezoelectric ceramic dispensing valves. This is because the adhesive itself contains numerous air bubbles, formed during adhesive mixing and filling due to chemical changes or physical processes. Furthermore, air compression occurs during the adhesive delivery process to the dispensing valve, and unstable pressure allows additional air to enter the adhesive. These air bubbles are carried into the dispensing valve along with the adhesive flow, causing fluid dynamics changes and instability. This instability leads to pressure fluctuations during rapid adhesive release, resulting in noticeable noise. This noise not only affects the operating environment and reduces user experience but is also considered a sign of malfunction in precision applications such as laboratories or high-precision manufacturing environments, thus impacting work efficiency and product quality. To address this issue, this invention utilizes a miniature vacuum pump to solve the problem, achieving… When production begins, the glue supply hose begins supplying glue to the dispensing valve body. The glue flows along the hose into the glue tank. The operator sets the maximum glue level in the tank based on actual operating conditions; this maximum level is lower than the air extraction port. When the glue level reaches the maximum, the moving gear rotates counter-clockwise, causing the gear teeth to mesh and drive the rack, which in turn moves the moving plate until it blocks the glue tank inlet, creating a seal. Simultaneously, a miniature vacuum pump starts, drawing a vacuum into the glue tank. This causes air bubbles in the glue to burst rapidly in the vacuum environment. Then, the moving gear rotates clockwise, allowing glue to continue flowing into the tank and pushing the bubble-free glue into the glue inlet channel. This process is repeated to prevent excessive noise from glue bubbles during operation. When production ends, the operator can again block the glue tank inlet with the moving plate and simultaneously restart the miniature vacuum pump in reverse, allowing air to enter the glue tank and expelling any remaining glue, preventing it from drying out. This improves user experience and extends equipment lifespan.

[0014] 2. In the prior art, when the glue supply tube is supplying glue, the constant shift of the center of gravity can easily cause the glue supply tube to tilt continuously, leading to breakage at the interface between the glue supply tube and the lower glue tube, glue leakage, and affecting the use of the equipment. To address this problem, this utility model adopts a top plate installation method. When the operator assembles the equipment, the glue supply tube is nested into the clamping groove of the top plate. The bottom of the top plate is fixed to the top of the dispensing valve body, thus fixing the glue supply tube. At the same time, the vibration and tilting trends of the glue supply tube are synchronized with the dispensing valve body, preventing the equipment from loosening and achieving the effect of improving the stability of the equipment.

[0015] 3. In the prior art, due to the large self-weight of the derivative parts and the dispensing valve body, they are more significantly affected by vibration, while the dispensing tube is light in weight. During equipment operation, the two are affected by vibration differently, which can cause displacement and loosening, and even lead to breakage of the dispensing tube. To address this problem, this utility model adopts the method of installing a fixing ring to solve the problem. The fixing ring restricts the vibration trend between the two, so that the vibration affects the two in a synchronized manner, preventing the components from shifting and loosening, thereby improving the service life of the equipment. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a cross-sectional view of a derivative of this utility model;

[0018] Figure 3 This is a cross-sectional view of the partition of this utility model;

[0019] Figure 4 This is a three-dimensional structural diagram of the action plate of this utility model.

[0020] Legend:

[0021] 1. Dispensing valve body; 101. Glue supply pipe; 102. Glue lower pipe; 103. Glue inlet channel; 2. Derivative parts; 201. Air outlet; 202. Glue tank; 203. Miniature vacuum pump; 204. Moving gear; 205. Rack; 206. Moving plate; 207. Glue hole; 208. Partition plate; 209. Air extraction hole; 3. Top plate; 301. Clamping groove; 302. Buffer pad; 4. Fixing ring. Detailed Implementation

[0022] To make the technical means, creative features, and achieved objectives and effects of this utility model easier to understand, the present utility model is further described below with reference to specific embodiments and accompanying drawings. However, the following embodiments are merely preferred embodiments of this utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments described in the implementation plan without creative effort are all within the protection scope of this utility model.

[0023] The specific embodiments of this utility model are described below with reference to the accompanying drawings. Specific embodiment:

[0025] Reference Figure 1-4A dual piezoelectric ceramic dispensing valve includes a dispensing valve body 1 and a dispensing tube 101. The inner wall of the dispensing valve body 1 has an inlet channel 103. A lower dispensing tube 102 is fixed to the bottom of the dispensing tube 101. A derivative component 2 is fixed to one side of the dispensing valve body 1. The bottom of the lower dispensing tube 102 is fixed to the top of the derivative component 2. A glue tank 202 is formed on the inner wall of the glue tank 202. A partition 208 is fixed to the inner wall of the glue tank 202. An air extraction hole 209 is formed on the surface of the partition 208. A miniature vacuum pump 203 is fixed to the inner wall of the glue tank 202. An air outlet 201 is formed on one side of the derivative component 2. A moving gear 204 is rotatably connected to the inner wall of the derivative component 2. The moving gear 204 meshes with a rack 205. A movable plate 206 is fixed to one side of the rack 205. The surface has adhesive holes 207. When using a dual piezoelectric ceramic dispensing valve, users may encounter significant operating noise. This is because the adhesive itself contains a large number of air bubbles. These bubbles are formed during adhesive mixing and filling due to chemical changes or physical processes. Furthermore, air compression occurs during the adhesive delivery process to the dispensing valve. Unstable pressure causes additional air to enter the adhesive, and these air bubbles are carried into the dispensing valve along with the adhesive flow. The presence of these air bubbles leads to changes and instability in fluid dynamics. This instability causes pressure fluctuations during rapid adhesive release, resulting in noticeable noise. This noise not only affects the operating environment and reduces the user experience, but also... Furthermore, in certain precision applications, such as laboratories or high-precision manufacturing environments, noise is often seen as a sign of malfunction, impacting work efficiency and product quality. This is addressed by installing a miniature vacuum pump 203. This system ensures that when production begins, the glue supply pipe 101 starts supplying glue to the dispensing valve body 1. The glue then enters the glue tank 202 along the lower glue pipe 102. Operators set the maximum glue level in the glue tank 202 according to actual operating conditions. This maximum level is lower than the suction port 209. When the glue level reaches its maximum, the moving gear 204 rotates counterclockwise, causing the gear 204 to mesh and drive the rack 205, which in turn moves the moving plate 206 until it blocks the entrance to the glue tank 202, allowing the glue to flow freely. The dispensing chamber 202 is sealed, and the micro vacuum pump 203 is activated to create a vacuum in the dispensing chamber 202. This causes air bubbles in the glue to burst rapidly under vacuum. Then, the moving gear 204 rotates clockwise to continue dispensing glue into the dispensing chamber 202, pushing the bubble-free glue into the glue inlet channel 103. The above steps are repeated, ensuring that the dispensing valve does not generate excessive noise due to glue air bubbles during operation. When production is finished, the operator can again block the entrance of the dispensing chamber 202 with the moving plate 206 and activate the micro vacuum pump 203 in reverse to allow air to be injected into the dispensing chamber 202, squeezing out any remaining glue and preventing it from drying out. This improves the user experience and extends the equipment's lifespan.The vent 209 is angled at 220 degrees to the bottom of the inner wall of the glue tank 202. This increased tilt angle raises the required height for glue overflow and prevents glue from entering the micro vacuum pump 203 due to vacuum, thus improving equipment stability. The diameter of the glue hole 207 is equal to the inner diameter of the retaining ring 4. This prevents glue from becoming clogged or flowing too fast due to diameter differences when passing through the glue hole 207, improving the uniformity of glue dispensing.

[0026] A top plate 3 is fixed to the top of the dispensing valve body 1. A clamping groove 301 is provided on one side of the top plate 3. A glue supply tube 101 is nested in the inner wall of the clamping groove 301. When the glue supply tube 101 supplies glue, the glue supply tube 101 is prone to tilting due to the continuous change of the center of gravity. This can cause the glue supply tube 101 to break at the interface with the lower glue tube 102, resulting in glue leakage and affecting the use of the equipment. The problem is solved by installing the top plate 3. When the operator assembles the equipment, the glue supply tube 101 is nested into the clamping groove 301 of the top plate 3. The bottom of the top plate 3 is fixed to the top of the dispensing valve body 1, so that the glue supply tube 101 is fixed. At the same time, the vibration and tilting of the glue supply tube 101 are synchronized with the dispensing valve body 1, preventing the equipment from loosening and improving the stability of the equipment. A retaining ring 4 is fixed to the bottom of the dispensing tube 102, and the bottom of the retaining ring 4 is fixed to the top of the derivative component 2. Since the derivative component 2 and the dispensing valve body 1 are relatively heavy, they are more significantly affected by vibration. The dispensing tube 102, however, is relatively light. During equipment operation, the two are affected by vibration differently, which can lead to displacement and loosening, and even breakage of the dispensing tube 102. The retaining ring 4 is used to solve this problem, limiting the vibration trend between the two components and synchronizing their effects, preventing displacement and loosening, and thus improving the equipment's lifespan. A rubber ring is fixed to the top of the retaining ring 4 to improve the seal between the retaining ring 4 and the dispensing tube 102, while also reducing the impact of vibration and improving the equipment's performance. A buffer pad 302 is fixed to the front of the dispensing valve body 1. The buffer pad 302 provides cushioning during transportation and, since the dispensing valve body 1 primarily moves along the X and Y axes, prevents collisions with the equipment, further extending the equipment's lifespan.

[0027] The working principle of this utility model is as follows: When production begins, the glue supply pipe 101 starts supplying glue to the dispensing valve body 1. The glue enters the glue tank 202 along the lower glue pipe 102. The operator sets the maximum glue level in the glue tank 202 according to the actual usage conditions. The maximum value is lower than the air extraction hole 209. When the glue level reaches the maximum value, the moving gear 204 rotates counterclockwise, causing the moving gear 204 to mesh and drive the rack 205, which in turn moves the moving plate 206 until the moving plate 206 blocks the entrance of the glue tank 202, making the glue tank 202 sealed. At the same time, the micro vacuum pump 203 starts, pushing the glue... Vacuuming is performed in dispensing chamber 202, causing air bubbles in the glue to burst rapidly in a vacuum environment. Then, the moving gear 204 rotates clockwise to continue filling the glue chamber 202 with glue, pushing the bubble-free glue into the glue inlet channel 103. The above steps are repeated to prevent the dispensing valve from generating excessive noise due to air bubbles in the glue during operation. At the end of production, the operator can again block the entrance of glue chamber 202 with the moving plate 206 and start the micro vacuum pump 203 in reverse to allow air to be injected into glue chamber 202, squeezing out the remaining glue and preventing the glue from drying out.

[0028] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A dual piezoelectric ceramic dispensing valve, comprising a dispensing valve body (1) and a dispensing tube (101), wherein the inner wall of the dispensing valve body (1) is provided with a dispensing channel (103), and a lower dispensing tube (102) is fixed at the bottom of the dispensing tube (101), characterized in that: A derivative component (2) is fixed to one side of the dispensing valve body (1). The bottom of the lower dispensing tube (102) is fixed to the top of the derivative component (2). A glue tank (202) is opened on the inner wall. A partition (208) is fixed to the inner wall of the glue tank (202). An air extraction hole (209) is opened on the surface of the partition (208). A micro vacuum pump (203) is fixed to the inner wall of the glue tank (202). An air outlet hole (201) is opened on one side of the derivative component (2). A moving gear (204) is rotatably connected to the inner wall of the derivative component (2). The moving gear (204) meshes with a rack (205). A moving plate (206) is fixed to one side of the rack (205). A glue hole (207) is opened on the surface of the moving plate (206).

2. The dual piezoelectric ceramic dispensing valve according to claim 1, characterized in that: The top of the dispensing valve body (1) is fixed with a top plate (3), and a clamping groove (301) is provided on one side of the top plate (3). A glue supply tube (101) is nested in the inner wall of the clamping groove (301).

3. The dual piezoelectric ceramic dispensing valve according to claim 1, characterized in that: The bottom of the lower tube (102) is fixed with a fixing ring (4), and the bottom of the fixing ring (4) is fixed to the top of the derivative (2).

4. The dual piezoelectric ceramic dispensing valve according to claim 1, characterized in that: A buffer pad (302) is fixed on the front of the dispensing valve body (1).

5. The dual piezoelectric ceramic dispensing valve according to claim 1, characterized in that: The air extraction hole (209) is oriented at a 220-degree angle to the bottom of the inner wall of the glue tank (202).

6. The dual piezoelectric ceramic dispensing valve according to claim 4, characterized in that: The diameter of the adhesive hole (207) is equal to the inner diameter of the fixing ring (4).

7. The dual piezoelectric ceramic dispensing valve according to claim 3, characterized in that: A rubber ring is fixed to the top of the fixing ring (4).

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