Automatic glue mixing stirrer
By designing an automatic resin mixing mixer, which employs horizontal blades and an anchor mixer, combined with a weighing sensor and a PLC controller, the problem of uneven resin mixing has been solved, enabling high-quality production of circuit boards.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-24
- Publication Date
- 2026-04-03
AI Technical Summary
Existing mixers often produce air bubbles when mixing resin solutions unevenly, leading to CAF (Conductivity, Adhesion, and Freeze) issues on circuit boards and affecting product quality.
An automatic resin mixing mixer was designed, which uses horizontal blades and anchor mixers, combined with a weighing sensor and PLC controller, and achieves uniform mixing of resin liquid through a servo transmission mechanism, reducing manual intervention.
This process achieves uniform mixing of the resin solution, reduces bubble generation, improves the product quality of the circuit board, and reduces the defect rate.
Smart Images
Figure CN224071730U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of printed circuit board processing, and in particular to an automatic adhesive mixing mixer. Background Technology
[0002] With the rapid development of electronic products, electronic devices are becoming lighter, thinner, and smaller, making the CAF (Content Aspect Ratio) problem of printed circuit boards an important factor affecting product reliability.
[0003] The CAF (Conductivity-Altered Failure) problem in printed circuit boards refers to the micro-short circuit phenomenon within the inner layers or solder resist layer of the circuit board. CAF refers to the phenomenon where, when a DC voltage is applied to a printed circuit board and it is placed in a high-humidity environment, the copper metal at the high potential anode will first oxidize into Cu+ or Cu++ ions in the layer-to-layer, line-to-line, hole-to-hole, or hole-to-line environments. These ions then slowly migrate and grow towards the cathode along the glass fiber bundles that have already formed poor channels. Meanwhile, electrons from the cathode will also move towards the anode. During this process, copper ions will be reduced to copper metal when they encounter electrons, and the copper metal will gradually spread from the anode to the cathode to form a copper film.
[0004] To reduce CAF (Content Availability and Fiber Resin) issues on circuit boards, ensuring thorough impregnation and bonding of the fiberglass cloth with the resin is crucial. The resin used for impregnation is particularly critical. Currently, the resin is prepared using a mixer, but existing mixers are manually controlled, requiring manual monitoring of the resin volume. Inadequate mixing can lead to filler settling and the formation of air bubbles in the resin. Fiberglass cloth coated with resin containing too many air bubbles is prone to evaporation and the formation of craters during baking in an oven, resulting in surface defects. Subsequent pressing and molding can cause air bubbles between the copper-clad laminate and the fiberglass cloth bundles, or bright spots on the copper-clad laminate, affecting product quality and increasing the defect rate. Summary of the Invention
[0005] The technical problem to be solved by this utility model is to provide an automatic glue mixing mixer that can ensure uniform mixing of resin solution for impregnating fiberglass cloth and reduce the production rate of air bubbles.
[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:
[0007] An automatic glue mixing mixer includes a mixing tank and mixing blades disposed inside the mixing tank. The mixing tank consists of an outer tank and an inner tank. The outer tank is provided with a support base on its exterior to stabilize its position. The inner tank is disposed inside the outer tank via an elastic mechanism that allows it to move up and down. The top of the inner tank is open, and the mixing blades are disposed inside the inner tank through the top opening. A servo drive mechanism with a vertically downward drive end is mounted above the inner tank. The servo drive mechanism is electrically connected to an external PLC controller, and the drive end of the servo drive mechanism is drively connected to the mixing blades disposed inside the inner tank.
[0008] Furthermore, a weighing sensor is installed on the outer side of the outer barrel near the top, and the weighing sensor is electrically connected to the PLC controller; a pressure block is installed on the outer side of the inner barrel near the top, corresponding to the upper and lower elastic strain gauges on the weighing sensor.
[0009] Furthermore, the stirring blades consist of a main shaft, horizontal blades, and an anchor stirrer. The main shaft is vertically arranged inside the inner barrel, and its upper end is fixedly connected to the transmission end of the servo transmission mechanism. The horizontal blades are fixedly arranged on the main shaft near its middle position, and the anchor stirrer is fixedly arranged at the lower end of the main shaft. A liquid level groove is provided on the inner side of the inner barrel, the top of which is higher than the height of the horizontal blades, and the bottom of which corresponds to the horizontal direction of the anchor stirrer.
[0010] Furthermore, the elastic mechanism consists of a spring, an upper guide positioning post, and a lower guide positioning post; the top of the inner barrel is provided with an outwardly horizontally folded flange joint; the upper guide positioning post is fixedly welded to the bottom of the flange joint, and the lower guide positioning post is fixedly welded to the top of the support base, corresponding vertically to the upper guide positioning post; the spring is sleeved on the outside of the corresponding upper and lower guide positioning posts.
[0011] Furthermore, the inner wall of the outer barrel has a vertically arranged guide slider, and the outer wall of the inner barrel has a guide groove that is vertically embedded and slidably engaged with the guide slider.
[0012] Furthermore, the servo transmission mechanism consists of a servo motor and a reducer. The servo motor is electrically connected to the PLC controller, and its transmission shaft is connected to the reducer. The reducer is mounted on the top of the inner barrel via a frame, and the power output end of the reducer passes downward through the frame and is connected to the stirring blades.
[0013] Furthermore, a timing controller is provided between the PLC controller and the servo motor.
[0014] Furthermore, a liquid level sensor is installed inside the inner tank.
[0015] Compared with the prior art, the advantages of this utility model are: this automatic glue mixing mixer can make the resin liquid in the mixing tank more uniformly through horizontal blades and anchor mixers. The weight information of the mixing tank is fed back to the PLC controller through the weighing sensor. The PLC controller controls the operation of the servo drive structure through AC motor relay or controls the operation of the servo drive mechanism through the timing controller to ensure that the resin liquid in the mixing tank can be effectively mixed, so that the liquid reaches the filler-free settling state, reduces the generation of bubbles, and improves the quality of the product. Attached Figure Description
[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0017] Figure 1 This is a schematic diagram of an automatic glue mixing and stirring system according to the present invention;
[0018] Figure 2 This is a schematic diagram of the structure of an automatic glue mixing stirrer according to this utility model.
[0019] In the diagram: 1. Agitator; 11. Outer tank; 111. Support base; 112. Guide slider; 12. Inner tank; 121. Guide chute; 122. Liquid level tank; 123. Upper guide positioning post; 124. Spring; 125. Lower guide positioning post; 13. Frame; 14. Servo motor; 15. Reducer; 16. Main shaft; 161. Horizontal blade; 162. Anchor agitator; 2. PLC controller; 3. Weighing sensor; 31. Pressure block; 4. Timing controller. Detailed Implementation
[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. In the description of the embodiments of the present invention, it should be noted that if terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" indicate orientation or positional relationships based on the orientation or positional relationships shown in the drawings, or the orientation or positional relationships commonly used when the product of the present invention is in use, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.
[0022] Furthermore, the use of terms such as "horizontal" or "vertical" does not imply that the component must be absolutely horizontal or vertical, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure or component must be completely horizontal, but can be slightly tilted.
[0023] In the description of the embodiments of this utility model, "a plurality of" means at least two.
[0024] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0025] Example:
[0026] Please refer to the instruction manual attached. Figure 1 and 2 As shown, the instruction manual is attached. Figure 1 and 2The illustration shows a specific embodiment of an automatic adhesive mixing and stirring device of this utility model, used for mixing and stirring resin liquid for coating fiberglass cloth. This reduces manual intervention and improves the intelligence of the mixing process and the uniformity of the adhesive liquid. The automatic adhesive mixing and stirring device in this embodiment includes a mixing tank and stirring blades disposed within the mixing tank; see the attached specification. Figure 2As shown, the mixing tank consists of an outer tank 11 and an inner tank 12. The outer tank 11 is externally equipped with a support base 111 for stabilizing its position. The inner tank 12 is movably mounted inside the outer tank 11 via an elastic mechanism. The inner tank 12 has an opening at the top, through which the mixing blades are positioned within it. To ensure uniform mixing of the resin solution within the inner tank 12, the mixing blades consist of a main shaft 16, horizontal blades 161, and an anchor-type agitator 162. The main shaft 16 is vertically positioned within the inner tank 12, and the horizontal blades 161 are fixedly mounted on the main shaft 16. Near its middle position, the horizontal blade 161 corresponds to the position one-third of the way from the top of the inner barrel 12. The anchor stirrer 162 is fixedly installed at the lower end of the main shaft 16, near the bottom of the inner barrel 12. To facilitate the operator's observation of the liquid level inside the barrel, a liquid level groove 122 is provided on the inner side of the inner barrel 12. The liquid level groove 122 has scale lines in the height direction. The top of the liquid level groove 122 is higher than the height of the horizontal blade 161, and the bottom corresponds to the horizontal direction of the anchor stirrer 162. To ensure the stability of the inner barrel 12 in the outer barrel 11, the elastic... The mechanism has at least three sets, with the outer tub 11 arranged in a circular array centered on the center of its top end face on the top of the support base 111. The elastic mechanism consists of a spring 124, an upper guide positioning post 123, and a lower guide positioning post 125. To facilitate the connection between the inner tub 12 and the support base 111 via the elastic mechanism, the top of the inner tub 12 is provided with an outwardly folded-out flange joint. The flange joint corresponds vertically to the top of the support base 111. The upper guide positioning post 123 is vertically welded to the bottom of the flange joint, and the lower guide positioning post 125 is vertically welded to the top of the support base 111. The lower guide positioning post 125 and the upper guide positioning post 125 are connected vertically. The upper and lower columns 123 are aligned vertically. The top and bottom of the spring 124 are respectively sleeved on the outside of the upper guide positioning column 123 and the lower guide positioning column 125, which are aligned vertically. The upward tension of the spring 124 makes the upper guide positioning column 123 and the lower guide positioning column 125 directly have a gap. A servo transmission mechanism for driving the stirring blades in the inner barrel 12 to rotate is mounted above the inner barrel 12. The servo transmission mechanism is electrically connected to the external PLC controller 2. The transmission end of the servo transmission mechanism is vertically downward. The transmission end of the servo transmission mechanism is fixedly connected to the upper end of the main shaft 16 in the stirring blades in the inner barrel 12 for transmission connection.The servo transmission mechanism consists of a servo motor 14 and a reducer 15. The servo motor 14 is electrically connected to a PLC controller 2, which controls the servo motor 14. The drive shaft of the servo motor 14 is connected to the reducer 15. The reducer 15 is mounted on top of the inner barrel 12 via a frame 13 and moves synchronously up and down with the inner barrel 12. Specifically, the power output end of the reducer 15 passes downward through the frame 13 and is connected to the stirring blades. More specifically, the reducer 15 passes downward through a pre-drilled connection hole on the frame 13 and is connected to the upper end of the main shaft 16. The servo motor 14 drives the main shaft 16 to rotate via the reducer 15, thereby driving the components connected to the main shaft 16... The horizontal blade 161 and the anchor mixer 162 rotate synchronously. To prevent the inner bucket 12 from swaying horizontally within the outer bucket 11 during mixing, and to ensure the balance of the inner bucket 12 during its vertical movement within the outer bucket 11, the inner wall of the outer bucket 11 has a vertically arranged guide slider 112. The outer wall of the inner bucket 12 has a guide groove 121 that is vertically embedded and slidably engaged with the guide slider 112. The inner bucket 12 is inserted into the guide slider 112 within the outer bucket 11 via the guide groove 121. The vertically inserted and slidably engaged guide slider 112 and guide groove 121 restrict the horizontal position of the inner bucket 12 within the outer bucket 11, while ensuring its linear vertical movement. To sense the inner bucket... The weight of the resin solution to be stirred is measured. A weighing sensor 3 is installed near the top of the outer barrel 1, and is electrically connected to the PLC controller 2. A pressure block 31, corresponding to the elastic strain gauge on the weighing sensor 3, is installed near the top of the outer barrel 12. When resin solution is added to the inner barrel 12, the inner barrel 12 sinks as the weight increases. When the pressure block touches the elastic strain gauge on the weighing sensor 3, it triggers the weighing sensor 3, which then sends information to the PLC controller 2. The PLC issues a warning, and the operator stops adding the resin solution or other materials to be stirred into the inner barrel 12. The PLC then controls the servo motor 14 to rotate. The servo motor 14 drives the main shaft 16 to rotate via the reducer 15. The main shaft 16 drives the horizontal blades 161 and the anchor agitator 162 to rotate synchronously, stirring the resin liquid in the inner tank 12. A liquid level sensor is installed inside the inner tank 12 to detect the position of the resin liquid. This sensor is electrically connected to the PLC. To ensure that the agitator blades can agitate the resin liquid in the inner tank 12 at regular intervals, a timing controller 4 is installed between the PLC controller 2 and the servo motor 14. This controller can set the start and stop times of the servo motor according to processing requirements, enabling timed stirring, improving flexibility, reducing manual operation, and preventing filler settling in the resin liquid in the inner tank 12, thereby reducing the generation of bubbles.
[0027] This automatic resin mixing mixer uses horizontal blades 161 and anchor mixers 162 to make the resin liquid in the mixing tank more evenly mixed. The weight information of the mixing tank is fed back to the PLC controller 2 by the weighing sensor 3. The PLC controller 2 controls the operation of the servo drive structure through the AC motor relay or the timing controller to ensure that the resin liquid in the mixing tank is effectively mixed, so that the liquid reaches the filler-free settling state, reduces the generation of bubbles, and improves the quality of the product.
[0028] It should be emphasized that the above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. An automatic glue mixer comprising a mixing bowl and mixing blades disposed within the mixing bowl, characterized by: The stirring barrel is composed of an outer barrel (11) and an inner barrel (12); the outer barrel (11) is externally provided with a support seat (111) for stabilizing the barrel body position, and the inner barrel (12) is movably arranged in the outer barrel (11) through an elastic mechanism; the inner barrel (12) is open at the top, the stirring blades are arranged in the inner barrel (12) through the top opening of the inner barrel (12), a vertical downward transmission end servo transmission mechanism is arranged above the inner barrel (12), the servo transmission mechanism is electrically connected with an external PLC controller (2), and the transmission end of the servo transmission mechanism is in transmission connection with the stirring blades arranged in the inner barrel (12).
2. The automatic glue mixing device according to claim 1, wherein: A load cell (3) is arranged at a position close to the top of the outer barrel (11), and the load cell (3) is electrically connected with the PLC controller (2); a pressurizing block (31) corresponding to the upper and lower elastic body strain gauges of the load cell (3) is arranged at a position close to the top of the outer barrel (12).
3. The automatic glue mixing device according to claim 1, wherein: The stirring blades are composed of a main shaft rod (16), a horizontal blade (161) and an anchor stirrer (162), the main shaft rod (16) is vertically arranged in the inner barrel (12), the upper end of the main shaft rod (16) is fixedly connected with the transmission end of the servo transmission mechanism, the horizontal blade (161) is fixedly arranged on the main shaft rod (16) at a position close to the middle part of the main shaft rod (16), and the anchor stirrer (162) is fixedly arranged at the lower end of the main shaft rod (16); the inner side of the inner barrel (12) is provided with a liquid level groove (122), the top of the liquid level groove (122) is higher than the height of the horizontal blade (161), and the bottom of the liquid level groove (122) corresponds to the horizontal direction of the anchor stirrer (162).
4. The automatic glue mixing device according to claim 1, wherein: The elastic mechanism is composed of a spring (124), an upper guide positioning column (123) and a lower guide positioning column (125); the inner barrel (12) is provided with an outwardly horizontally folded flange joint at the top; the upper guide positioning column (123) is fixedly welded at the bottom of the flange joint, the lower guide positioning column (125) is fixedly welded at the top of the support seat (111) and corresponds to the upper guide positioning column (123) in the up-down direction, and the spring (124) is sleeved outside the upper guide positioning column (123) and the lower guide positioning column (125) corresponding in the up-down direction.
5. The automatic glue mixing device according to claim 1, wherein: The inner wall of the outer barrel (11) is provided with a vertical guide sliding block (112), and the outer wall of the inner barrel (12) is provided with a guide sliding groove (121) in embedded sliding cooperation with the guide sliding block (112) in the up-down direction.
6. The automatic glue mixing device according to claim 1, wherein: The servo transmission mechanism is composed of a servo motor (14) and a speed reducer (15), the servo motor (14) is electrically connected with the PLC controller (2), the transmission shaft of the servo motor (14) is in transmission connection with the speed reducer (15), the speed reducer (15) is arranged on the top of the inner barrel (12) through a rack (13), and the power output end of the speed reducer (15) penetrates through the rack (13) downward and is in transmission connection with the stirring blades.
7. The automatic glue mixing device according to claim 6, wherein: A timing controller (4) is arranged between the PLC controller (2) and the servo motor (14).
8. The automatic glue mixing device according to claim 1, wherein: A liquid level sensor is arranged in the inner barrel (12).