Low-melting point glass powder screening device for electronic packaging

Abstract

The utility model relates to a kind of low melting point glass powder screening devices for electronic packaging, including screening box, horizontal screening cylinder is equipped in screening box, one end of the screening cylinder is connected with horizontal feed pipe, the other end of feed pipe is through screening box and is drawn out screening box outside and is equipped with feed hopper, feed screw one is equipped in feed pipe, the sidewall of screening cylinder is covered with sieve hole, the cylinder wall of screening cylinder is equipped with openable and closable discharge port, the other end of screening cylinder is fixedly connected with rotating shaft, the rotating shaft corresponding screening box is fixed with baffle, transmission cavity is formed between the baffle and screening box, rotating shaft is sequentially through baffle and screening box and is connected with stepper motor two after;Cleaning rod is equipped in the screening box above screening cylinder.The utility model is screened in screening box, avoids glass powder splashing, high safety, effectively avoids pollution to operating environment;Glass powder can be more efficiently screened.

Description

Technical Field

[0001] This utility model belongs to the field of screening equipment technology, specifically relating to a screening device for low melting point glass powder used in electronic packaging. Background Technology

[0002] In the field of electronic packaging, low-melting-point glass powder plays an irreplaceable role as a binder or encapsulation material. Low-melting-point glass powder for electronic packaging is an important material, possessing not only low melting point, good sintering performance, excellent electrical properties, good mechanical properties, and chemical stability, but also significantly improved resistance to yellowing, pressure, flexural strength, impermeability, corrosion resistance, impact resistance, and abrasion resistance. The performance of glass powder is often tested using the powder method, requiring the test samples to be screened to separate powders that meet the testing requirements. Patent document CN118577490A discloses an optical glass powder sieving device. It mainly solves the problems of complex operation, long time consumption, low automation, and significant impact on testing efficiency associated with manual glass breaking and screening. It consists of a high-mesh vibrating screen, a low-mesh vibrating screen, and a screening guide plate; wherein, the inlet of the low-mesh vibrating screen is connected to the outlet of the high-mesh vibrating screen; the screening guide plate has staggered protrusions that are inclined and connected to the outlet of the low-mesh vibrating screen. While this patented device boasts advantages such as improved screening efficiency, simple operation, low cost, automated screening capability, and the ability to meet the requirements for screening optical glass powder, its screens are all exposed, making it easy for small glass powder particles to splatter, causing environmental pollution (e.g., air pollution) and posing certain safety hazards to operators. Therefore, a low-melting-point glass powder screening device for electronic packaging is needed to solve these technical problems. Summary of the Invention

[0003] To address the aforementioned deficiencies in the existing technology, this utility model provides a sieving device for low-melting-point glass powder used in electronic packaging, comprising a sieving box with a discharge pipe equipped with a switch valve; a horizontal sieving cylinder inside the sieving box, one end of which is connected to a horizontal feed pipe, one end of which is connected to the sieving cylinder and rotatably connected via a bearing, the other end of which extends out of the sieving box and is fixedly connected to it; a feed hopper is provided on the feed pipe outside the sieving box; a feeding screw is provided inside the feed pipe, and a stepper motor is connected to the feeding screw; the side wall of the sieving cylinder is covered with sieve holes, and an openable discharge port is provided on the cylinder wall; a rotating shaft is fixedly connected to the other end of the sieving cylinder; a partition is fixed inside the sieving box corresponding to the rotating shaft, forming a transmission cavity between the partition and the sieving box; and the rotating shaft is connected to a stepper motor after passing through the partition and the sieving box in sequence.

[0004] A cleaning rod is provided inside the screening box above the screening cylinder. The cleaning rod has bristles that contact the outer wall of the screening cylinder. Both ends of the cleaning rod are rotatably connected to the inner wall of the screening box via bearings. The cleaning rod is parallel to the central axis of the screening cylinder. One end of the cleaning rod passes through the transmission cavity. Both the rotating shaft and the cleaning rod located in the transmission cavity are equipped with transmission gears. The two transmission gears are connected by a transmission chain.

[0005] Furthermore, the bottom of the screening box is conical, and the discharge pipe is located at the center of the conical bottom. This facilitates material discharge.

[0006] Furthermore, the cleaning rod is equipped with a spiral feeding blade, and the bristles are fixed to the edge of the feeding blade. This design allows the bristles to clean the screen holes more efficiently and thoroughly. The contact between the bristles and the screen holes is spiral-forward, resulting in greater cleaning force and a more thorough and efficient cleaning.

[0007] Furthermore, an electric gate is provided at the discharge port. The electric gate is existing technology, and its structure and principle will not be described in detail here.

[0008] Furthermore, the cleaning rod is equipped with a water guiding cavity, and the cleaning rod above the screening cylinder is equipped with a water spray hole communicating with the water guiding cavity. One end of the water guiding cavity is connected to a water inlet pipe through a rotary joint. After screening, cleaning fluid is introduced to clean the screening cylinder without affecting its next use.

[0009] This invention also includes other components that enable the normal operation of a low-melting-point glass powder sieving device for electronic packaging, such as control components for stepper motor one, stepper motor two, electric door, and valve switching, all of which are conventional technologies in the field. Furthermore, devices or components not specified in this invention, such as feeding screws, valves, electric doors, transmission gears, and transmission chains, all employ conventional technologies and equipment in the field.

[0010] The beneficial effects of this utility model are as follows: screening is carried out inside the screening box, which avoids glass powder splashing, ensuring high safety and effectively preventing pollution of the operating environment; it can screen glass powder more efficiently, with high screening efficiency and good screening effect; after screening, it is easy to clean the equipment without affecting the next use. Attached Figure Description

[0011] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0012] Figure 1 This is a schematic diagram of the structure of a low-melting-point glass powder sieving device for electronic packaging according to Embodiment 1 of this utility model;

[0013] Figure 2This is a schematic diagram of a low-melting-point glass powder sieving device for electronic packaging in Example 2.

[0014] In the diagram: 1. Screening box; 2. Screening cylinder; 3. Conical bottom; 4. Feed pipe; 5. Feeding screw one; 6. Stepper motor one; 7. Feed hopper; 8. Rotary shaft; 9. Stepper motor two; 10. Drive chain; 11. Cleaning bar; 12. Partition plate; 13. Brush bristles; 14. Feeding paddle; 15. Electric door; 16. Transmission chamber; 17. Water inlet pipe; 18. Water spray hole. Detailed Implementation

[0015] The present invention will now be clearly described with reference to the accompanying drawings and specific embodiments. This description is merely for explaining the present invention and is not intended to limit it. Any modifications, equivalent substitutions, improvements, etc., made by those skilled in the art based on the embodiments of the present invention without inventive effort to obtain all other embodiments should be included within the protection scope of the present invention.

[0016] Example 1

[0017] like Figure 1 As shown, this utility model provides a sieving device for low melting point glass powder used in electronic packaging, including a sieving box 1. The sieving box 1 is equipped with a discharge pipe with a switch valve. A horizontal sieving cylinder 2 is provided inside the sieving box 1. One end of the sieving cylinder 2 is connected to a horizontal feed pipe 4. One end of the feed pipe 4 is connected to the sieving cylinder 2 and rotatably connected via a bearing. The other end of the feed pipe 4 passes through the sieving box 1 and extends out of the sieving box 1. The feed pipe 4 is fixedly connected to the sieving box 1 and is a feed pipe outside the sieving box 1. 4 is equipped with a feeding hopper 7, and a feeding screw 5 is provided inside the feeding pipe 4. The feeding screw 5 is connected to a stepper motor 6. The side wall of the screening cylinder 2 is covered with screen holes, and the cylinder wall of the screening cylinder 2 is provided with an openable discharge port. The other end of the screening cylinder 2 is fixedly connected to a rotating shaft 8. A partition 12 is fixed inside the screening box 1 corresponding to the rotating shaft 8. A transmission cavity 16 is formed between the partition 12 and the screening box 1. The rotating shaft 8 passes through the partition 12 and the screening box 1 in sequence and is connected to a stepper motor 9.

[0018] A cleaning rod 11 is provided inside the screening box 1 above the screening cylinder 2. The cleaning rod 11 is provided with bristles 13. The bristles 13 are in contact with the outer wall of the screening cylinder 2. The two ends of the cleaning rod 11 are rotatably connected to the inner wall of the screening box 1 through bearings. The cleaning rod 11 is parallel to the central axis of the screening cylinder 2. One end of the cleaning rod 11 passes through the transmission cavity 16. Both the rotating shaft 8 and the cleaning rod 11 located in the transmission cavity 16 are provided with transmission gears. The two transmission gears are connected by a transmission chain 10.

[0019] The bottom of the screening box 1 is a conical bottom 3, and the discharge pipe is located at the center of the conical bottom 3. This facilitates material discharge.

[0020] The cleaning rod 11 is equipped with a spiral feeding blade 14, and the bristles 13 are fixed to the edge of the feeding blade 14. This arrangement allows the bristles 13 to clean the screen holes more efficiently and thoroughly. The contact between the bristles 13 and the screen holes is spiral forward, resulting in greater cleaning force and more thorough and efficient cleaning.

[0021] An electric gate 15 is provided at the discharge port. The electric gate 15 is existing technology, and its structure and principle will not be described in detail here.

[0022] Working principle: The glass powder to be screened enters the feed pipe from the feed hopper and is fed into the screening cylinder by the feed screw. The screening cylinder rotates continuously to screen the powder. The qualified powder enters the conical bottom and is discharged from the discharge pipe, completing the screening. During the screening process, the cleaning rod rotates continuously, and the bristles clean the screen holes of the screening cylinder to avoid clogging and improve the screening effect and efficiency.

[0023] Example 2

[0024] like Figure 2 As shown, this utility model provides a sieving device for low melting point glass powder for electronic packaging, including a sieving box 1. The sieving box 1 is equipped with a discharge pipe with a switch valve and an openable maintenance port. A horizontal sieving cylinder 2 is provided inside the sieving box 1. One end of the sieving cylinder 2 is connected to a horizontal feed pipe 4. One end of the feed pipe 4 is connected to the sieving cylinder 2 and rotatably connected via a bearing. The other end of the feed pipe 4 extends out of the sieving box 1 and is fixedly connected to the sieving box 1. A feed hopper 7 is provided on the feed pipe 4 outside the sieving box 1. A feeding screw 5 is provided inside the feed pipe 4. The feed screw 5 is connected to the stepper motor 6. The side wall of the screening cylinder 2 is covered with screen holes. The cylinder wall of the screening cylinder 2 is provided with an openable discharge port. For example, an openable material gate can be set at the discharge port by a buckle. The opening and closing of the material gate can be operated from the maintenance port, or the material gate can be an electric gate. The openable discharge port is existing technology and will not be described in detail here. The other end of the screening cylinder 2 is fixedly connected to the rotating shaft 8. The screening box 1 corresponding to the rotating shaft 8 is fixed with a partition 12. The partition 12 and the screening box 1 form a transmission cavity 16. The rotating shaft 8 passes through the partition 12 and the screening box 1 in sequence and is connected to the stepper motor 9.

[0025] A cleaning rod 11 is provided inside the screening box 1 above the screening cylinder 2. The cleaning rod 11 is provided with bristles 13. The bristles 13 are in contact with the outer wall of the screening cylinder 2. The two ends of the cleaning rod 11 are rotatably connected to the inner wall of the screening box 1 through bearings. The cleaning rod 11 is parallel to the central axis of the screening cylinder 2. One end of the cleaning rod 11 passes through the transmission cavity 16. Both the rotating shaft 8 and the cleaning rod 11 located in the transmission cavity 16 are provided with transmission gears. The two transmission gears are connected by a transmission chain 10.

[0026] The bottom of the screening box 1 is a conical bottom 3, and the discharge pipe is located at the center of the conical bottom 3. This facilitates material discharge.

[0027] The cleaning rod 11 is equipped with a spiral feeding blade 14, and the bristles 13 are fixed to the edge of the feeding blade 14. This arrangement allows the bristles 13 to clean the screen holes more efficiently and thoroughly. The contact between the bristles 13 and the screen holes is spiral forward, resulting in greater cleaning force and more thorough and efficient cleaning.

[0028] The cleaning rod 11 has a water guiding cavity inside, and the cleaning rod 11 above the screening cylinder 2 has a water spray hole 18 communicating with the water guiding cavity. One end of the water guiding cavity is connected to a water inlet pipe 17 through a rotary joint. After screening, cleaning fluid is introduced to clean the screening cylinder 2 without affecting its next use.

[0029] Working Principle: The glass powder to be screened enters the feed pipe from the feed hopper and is fed into the screening cylinder by the feeding screw. The screening cylinder rotates continuously, screening the powder. Qualified powder enters the conical bottom and exits through the discharge pipe, completing the screening process. During screening, the cleaning rod rotates continuously, and the bristles clean the screen holes of the screening cylinder to prevent clogging and improve screening effect and efficiency. After screening, qualified powder exits through the discharge pipe, and unqualified powder exits through the discharge port. Cleaning fluid is then introduced into the cleaning rod to clean the screening cylinder, ensuring it is usable for future applications.

[0030] Regarding the feeding screw, stepper motor, rotary joint, electric door, etc. in the above two embodiments, this application does not make any improvements to them, but only utilizes their existing functions; the control programs and principles involved can be referred to the product manual or existing technical documents, which are all prior art.

[0031] The embodiments of this utility model have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A sieving device for low-melting-point glass powder used in electronic packaging, comprising a sieving box, wherein the sieving box is provided with a discharge pipe equipped with a switch valve; characterized in that: The screening box contains a horizontal screening cylinder. One end of the screening cylinder is connected to a horizontal feed pipe. One end of the feed pipe is connected to the screening cylinder and rotated through a bearing. The other end of the feed pipe extends out of the screening box and is fixedly connected to it. A feed hopper is provided on the feed pipe outside the screening box. A feeding screw is provided inside the feed pipe. A stepper motor is connected to the feeding screw. The side wall of the screening cylinder is covered with screen holes. An openable discharge port is provided on the cylinder wall. A rotating shaft is fixedly connected to the other end of the screening cylinder. A partition is fixed inside the screening box corresponding to the rotating shaft. A transmission cavity is formed between the partition and the screening box. The rotating shaft passes through the partition and the screening box in sequence and is connected to a stepper motor. A cleaning rod is provided inside the screening box above the screening cylinder. The cleaning rod has bristles that contact the outer wall of the screening cylinder. Both ends of the cleaning rod are rotatably connected to the inner wall of the screening box via bearings. The cleaning rod is parallel to the central axis of the screening cylinder. One end of the cleaning rod passes through the transmission cavity. Both the rotating shaft and the cleaning rod located in the transmission cavity are equipped with transmission gears. The two transmission gears are connected by a transmission chain.

2. The low-melting-point glass powder sieving device for electronic packaging according to claim 1, characterized in that: The bottom of the screening box is conical, and the discharge pipe is located at the center of the conical bottom.

3. The low-melting-point glass powder sieving device for electronic packaging according to claim 1, characterized in that: The cleaning rod is equipped with a spiral feeding blade, and the bristles are fixed to the edge of the feeding blade.

4. The low-melting-point glass powder sieving device for electronic packaging according to claim 1, characterized in that: An electric gate is installed at the discharge port.

5. The low-melting-point glass powder sieving device for electronic packaging according to claim 1, characterized in that: The cleaning rod is provided with a water guiding cavity, and the cleaning rod above the screening cylinder is provided with a water spray hole that communicates with the water guiding cavity. One end of the water guiding cavity is connected to a water inlet pipe through a rotary joint.

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