PCB drill bit forming press with dosing function
Patent Information
- Application Number
- CN202522199894.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-17
- Publication Date
- 2026-10-09
- Estimated Expiration
- 2035-10-17
AI Technical Summary
这种较大的质量偏差会直接导致钻头尺寸精度下降，严重影响PCB钻头的成品质量及钻孔性能
一种具有定量给料功能的PCB钻头成型压机通过多级挤压设计，第二电动推杆带动压板对粉料进行初次挤压，有效减少粉料间间隙，使粉料分布更均匀密实；绞龙输送过程中，弹簧与挡板配合实现二次挤压，进一步消除粉料内部空隙，这种双重挤压机制确保了进入成型模具的粉料具有高度的一致性和紧实度，从而提高了压制棒料的密度均匀性和尺寸精度，减少了因粉料不均匀导致的棒料内部缺陷和尺寸偏差，显著提升了产品的质量。
Smart Images
Figure CN224824536U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of PCB drill bit forming technology, specifically a PCB drill bit forming press with quantitative feeding function. Background Technology
[0002] As a precision machining tool, the dimensional accuracy and performance stability of PCB (Printed Circuit Board) drill bits play a decisive role in the drilling quality of PCB boards. In the PCB drill bit forming process, precise feeding is one of the core steps to ensure drill bit quality.
[0003] Currently, many PCB drill bit forming presses use traditional fixed-volume hoppers as their quantitative feeding system. The volume of this hopper is fixed during the design phase and cannot be dynamically adjusted according to actual working conditions. However, in actual production, the particle size distribution of the powder, i.e., the ratio of coarse to fine powder, can cause variations in the powder's bulk density. For example, when the proportion of coarse powder increases, the gaps between the powder particles increase, resulting in a decrease in the mass of powder per volume and a lower density; conversely, an increase in the proportion of fine powder increases the powder density. Because fixed-volume hoppers cannot adapt to these fluctuations in powder density, significant deviations in the quality of single feeds occur in actual production. Test data shows that with a powder density fluctuation of ±15%, the quality deviation of a single feed using a traditional fixed-volume hopper can reach 5%-10%. This large quality deviation directly leads to a decrease in drill bit dimensional accuracy, severely affecting the finished product quality and drilling performance of PCB drill bits. Utility Model Content
[0004] The purpose of this invention is to provide a PCB drill bit forming press with a quantitative feeding function to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a PCB drill bit forming press with quantitative feeding function, comprising a base, a feeding assembly, a pressing assembly, and a blanking assembly, the blanking assembly comprising two support plates, a mounting frame fixed above the two support plates, a discharge hopper fixed inside the mounting frame, a conveying cylinder connected below the discharge hopper, an auger rotatably mounted inside the conveying cylinder, a connecting column connected to the end of the auger, a baffle slidably mounted on the connecting column, a spring sleeved on the connecting column, one end of the spring abutting against the baffle, the other end of the spring abutting against the conveying cylinder, a blanking pipe connected below the conveying cylinder, a cover plate fixed to the end of the blanking pipe, an auger motor fixed to the end of the conveying cylinder, and the output shaft of the auger motor fixedly connected to the auger.
[0006] A second electric push rod is fixed above the discharge hopper, and a pressure plate is fixed at the end of the second electric push rod. Several vent holes are opened on the pressure plate, and an opening and closing door is provided on the side of the discharge hopper.
[0007] With the above structure, the second electric push rod extends and drives the pressure plate to descend. The pressure plate squeezes the powder, reducing the gap between the powder particles. Several vent holes can discharge air, preventing residual air in the powder from causing defects such as air holes inside the pressed bar, thus further improving the quality of the product.
[0008] The feeding assembly includes a first electric push rod, which is fixed above the base. A conveying trough block is fixed at the end of the first electric push rod, and a limit block is fixed below the conveying trough block. Both the conveying trough block and the limit block have discharge holes inside.
[0009] With the above structure, the powder is quantitatively conveyed into the discharge hole of the conveying trough. The first electric push rod extends and drives the conveying trough to move, thereby conveying the powder to the designated position.
[0010] The pressing assembly includes a protective box and a forming mold. The protective box is fixed above the base, and a hydraulic push rod is fixed above the protective box. A pressing block is provided at the end of the hydraulic push rod. The forming mold is embedded inside the base. One end of the protective box is hinged with an opening and closing plate, and a discharge port is provided on the opening and closing plate. The other end of the protective box is provided with a feeding port.
[0011] Using the above structure, the powder is conveyed into the molding die. The hydraulic push rod extends and drives the pressing block to descend. The pressing block and the molding die work together to extrude the powder into rods. The opening and closing plate facilitates inspection and maintenance.
[0012] The feeding assembly also includes a guide block, which is fixed above the base. The guide block is U-shaped, and a limiting block is slidably disposed on the guide block. The end of the guide block is located on the side of the forming mold.
[0013] With the above structure, the guide block can limit the left and right sides of the limiting block, preventing the conveying trough block from shifting during movement, ensuring that the powder can enter the molding die accurately, and improving the accuracy and stability of feeding.
[0014] Compared with the prior art, the beneficial effects of this utility model are: A PCB drill bit forming press with quantitative feeding function adopts a multi-stage extrusion design. The second electric push rod drives the pressure plate to perform the initial extrusion of the powder, which effectively reduces the gap between powder particles and makes the powder distribution more uniform and dense. During the auger conveying process, the spring and the baffle cooperate to achieve secondary extrusion, further eliminating the internal voids of the powder. This dual extrusion mechanism ensures that the powder entering the forming mold has a high degree of consistency and compactness, thereby improving the density uniformity and dimensional accuracy of the pressed rod, reducing the internal defects and dimensional deviations of the rod caused by uneven powder, and significantly improving the quality of the product. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the front three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the rear three-dimensional structure of the present invention; Figure 3 This is a partial cross-sectional structural diagram of the present invention; Figure 4 This is a cross-sectional structural diagram of some components in this utility model.
[0016] In the diagram: 1. Discharge hopper; 2. Support plate; 3. Base; 4. Discharge port; 5. Opening and closing plate; 6. Hydraulic push rod; 7. Protective box; 8. Feed inlet; 9. Guide block; 10. First electric push rod; 11. Screw motor; 12. Mounting bracket; 13. Opening and closing door; 14. Second electric push rod; 15. Conveying trough block; 16. Cover plate; 17. Conveying cylinder; 18. Connecting column; 19. Spring; 20. Baffle; 21. Drop pipe; 22. Screw; 23. Pressure plate. Detailed Implementation
[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0018] like Figures 1-4 As shown, this utility model provides a technical solution: a PCB drill bit forming press with quantitative feeding function, including a base 3, a material dropping component, a feeding component and a pressing component are arranged above the base 3. The material dropping component includes two support plates 2, and a mounting frame 12 is fixed above the two support plates 2. A discharge hopper 1 is fixed inside the mounting frame 12. A conveying cylinder 17 is connected below the discharge hopper 1. An auger 22 is rotatably arranged inside the conveying cylinder 17. A connecting column 18 is connected to the end of the auger 22. A baffle 20 is slidably arranged on the connecting column 18. A spring 19 is sleeved on the connecting column 18. One end of the spring 19 abuts against the baffle 20, and the other end of the spring 19 abuts against the conveying cylinder 17. A material dropping pipe 21 is connected below the conveying cylinder 17. A cover plate 16 is fixed to the end of the material dropping pipe 21. An auger motor 11 is fixed to the end of the conveying cylinder 17. The output shaft of the auger motor 11 is fixedly connected to the auger 22.
[0019] A second electric push rod 14 is fixed above the discharge hopper 1, and a pressure plate 23 is fixed to the end of the second electric push rod 14. Several vent holes are opened on the pressure plate 23, and an opening and closing door 13 is provided on the side of the discharge hopper 1. When the second electric push rod 14 extends, it drives the pressure plate 23 to descend. The pressure plate 23 squeezes the powder, reduces the gap between the powder, and the several vent holes can discharge air, so as to avoid residual air in the powder, which may cause defects such as air holes in the pressed bar material, and further improve the quality of the product.
[0020] The feeding assembly includes a first electric push rod 10, which is fixed above the base 3. A conveying trough block 15 is fixed to the end of the first electric push rod 10, and a limit block is fixed below the conveying trough block 15. Both the conveying trough block 15 and the limit block have discharge holes. The powder is quantitatively fed into the discharge hole of the conveying trough block 15. The first electric push rod 10 extends and drives the conveying trough block 15 to move, thereby conveying the powder to the designated position.
[0021] The pressing assembly includes a protective box 7 and a forming mold. The protective box 7 is fixed above the base 3, and a hydraulic push rod 6 is fixed above the protective box 7. A pressing block is provided at the end of the hydraulic push rod 6. The forming mold is embedded inside the base 3. One end of the protective box 7 is hinged to an opening and closing plate 5, and a discharge port 4 is provided on the opening and closing plate 5. The other end of the protective box 7 is provided with a feeding port 8. The powder is conveyed into the forming mold, and the hydraulic push rod 6 extends to drive the pressing block to descend. The pressing block and the forming mold cooperate to compress the powder into rods. The opening and closing plate 5 facilitates inspection and maintenance.
[0022] The feeding assembly also includes a guide block 9, which is fixed above the base 3. The guide block 9 is U-shaped, and the limiting block is slidably disposed on the guide block 9. The end of the guide block 9 is located on the side of the forming mold. The guide block 9 can limit the left and right sides of the limiting block to prevent the conveying trough block 15 from shifting during movement, ensuring that the powder can enter the forming mold accurately and without error, thus improving the accuracy and stability of feeding.
[0023] Working principle: Open the opening and closing door 13 and put powder into the discharge hopper 1. The second electric push rod 14 extends, driving the pressure plate 23 to descend. The pressure plate 23 squeezes the powder to reduce the gap between the powder particles. The auger motor 11 drives the auger 22 to rotate through the output shaft. The auger 22 conveys the powder to the baffle 20. The spring 19 and the baffle 20 cooperate to squeeze the powder a second time, further reducing the gap between the powder particles. When the pressure exceeds the limit, the baffle 20 compresses the spring 19, and the powder falls into the discharge pipe 21, and then from the discharge pipe 21 into the discharge hole of the conveying trough block 15. The first electric push rod... The first electric push rod 10 extends, causing the conveying trough block 15 to move, thereby conveying the powder into the molding die. Then, the first electric push rod 10 retracts, causing the conveying trough block 15 to move to the initial position. The hydraulic push rod 6 extends, causing the pressing block to descend. The pressing block and the molding die cooperate to extrude the powder into a rod-shaped blank for the PCB drill bit. After pressing, the molding die pushes out the rod-shaped blank for the PCB drill bit. The first electric push rod 10 extends, causing the conveying trough block 15 to move. The conveying trough block 15 causes the limiting block to move. The limiting block pushes out the rod-shaped blank for the PCB drill bit from the discharge port 4, completing the processing.
[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended embodiments and their equivalents.
Claims
1. A PCB drill bit forming press with quantitative feeding function, comprising a base (3), wherein a feeding assembly, a feeding assembly, and a pressing assembly are disposed above the base (3), characterized in that: The material feeding assembly includes two support plates (2), and an mounting frame (12) is fixed above the two support plates (2). A discharge hopper (1) is fixed inside the mounting frame (12). A conveying cylinder (17) is connected below the discharge hopper (1). An auger (22) is rotatably installed inside the conveying cylinder (17). A connecting column (18) is connected to the end of the auger (22). A baffle (20) is slidably installed on the connecting column (18). A spring (19) is sleeved on the connecting column (18). One end of the spring (19) abuts against the baffle (20), and the other end of the spring (19) abuts against the conveying cylinder (17). A material feeding pipe (21) is connected below the conveying cylinder (17). A cover plate (16) is fixed to the end of the material feeding pipe (21). An auger motor (11) is fixed to the end of the conveying cylinder (17). The output shaft of the auger motor (11) is fixedly connected to the auger (22).
2. A PCB drill bit forming press with quantitative feeding function according to claim 1, characterized in that: A second electric push rod (14) is fixed above the discharge hopper (1), and a pressure plate (23) is fixed at the end of the second electric push rod (14). Several exhaust holes are provided on the pressure plate (23), and an opening and closing door (13) is provided on the side of the discharge hopper (1).
3. A PCB drill bit forming press with quantitative feeding function according to claim 1, characterized in that: The feeding assembly includes a first electric push rod (10), which is fixed above the base (3). A conveying trough block (15) is fixed at the end of the first electric push rod (10). A limit block is fixed below the conveying trough block (15). Both the conveying trough block (15) and the limit block have discharge holes inside.
4. A PCB drill bit forming press with quantitative feeding function according to claim 3, characterized in that: The pressing assembly includes a protective box (7) and a forming mold. The protective box (7) is fixed above the base (3). A hydraulic push rod (6) is fixed above the protective box (7). A pressing block is provided at the end of the hydraulic push rod (6). The forming mold is embedded inside the base (3). A hinged opening plate (5) is connected to one end of the protective box (7). A discharge port (4) is provided on the opening plate (5). A feed port (8) is provided at the other end of the protective box (7).
5. A PCB drill bit forming press with quantitative feeding function according to claim 4, characterized in that: The feeding assembly also includes a guide block (9), which is fixed above the base (3). The guide block (9) is U-shaped, and the limiting block is slidably disposed on the guide block (9). The end of the guide block (9) is located on the side of the molding die.