Online circulating copper powder recovery device of circuit board grinding machine

Abstract

The utility model relates to the technical field of circuit board processing auxiliary equipment, in particular to an on-line circulating copper powder recovery device of a circuit board grinding machine, which comprises a water collecting tank for collecting production line wastewater and a filter pressing mechanism for filtering copper powder, the filter pressing mechanism is arranged above the water collecting tank, and a plurality of tank bodies, namely a stirring tank, a mixing tank and a clear water tank, are arranged in the water collecting tank respectively. Wastewater is fed and mixed in the mixing box and then conveyed to the filter pressing mechanism for solid-liquid separation, the liftable high-pressure flushing mechanism is further arranged on the filter pressing mechanism, a plurality of filter plates of the filter pressing mechanism can be quickly flushed, blockage is avoided, the high-pressure flushing mechanism can horizontally move and ascend and descend, parts such as the filter plates can be conveniently replaced, the filter plates can be flushed at the same time, and the filter pressing efficiency is improved. And manual cleaning is not needed, the efficiency is higher, under the condition of continuous production of the circuit boards, the recovery device can be recovered more quickly, and the service life of the filter plate is prolonged.

Description

Technical Field

[0001] This utility model belongs to the technical field of copper powder recovery equipment, specifically an online circulating copper powder recovery device for a circuit board grinding machine. Background Technology

[0002] The PCB grinding machine is a key piece of equipment in the PCB manufacturing process. It improves the adhesion and reliability of subsequent processes by grinding the surface of the substrate.

[0003] The grinding debris generated during the grinding process mainly consists of copper powder, resin substrate fragments, and glass fiber fragments. Among these, copper powder has significant recycling value, and its efficient recycling can effectively reduce production costs.

[0004] Currently, filter presses are used to separate copper-containing grinding slurries into solid and liquid components to recover copper powder. However, after continuous operation, the filter plate surface and filter cloth pores gradually become clogged with grinding debris, leading to a decrease in filtration efficiency. Currently, filter plate cleaning is generally done manually, which involves downtime, long cleaning cycles, and low efficiency, severely limiting the continuous operating efficiency of the equipment and the copper powder recovery capacity.

[0005] Therefore, it is necessary to develop a mechanism or device that can automatically, quickly, and efficiently complete the cleaning of filter plates. Utility Model Content

[0006] Based on this, this solution provides an online circulating copper powder recovery device for circuit board grinding machines, which can quickly and automatically complete the cleaning of filter plates, improve the efficiency of the recovery device, and extend the service life of the filter plates.

[0007] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:

[0008] An online circulating copper powder recovery device for a circuit board grinding machine includes: a water collection tank for collecting production line wastewater and a filter press mechanism for filtering copper powder. The filter press mechanism is installed above the water collection tank. The water collection tank is divided into multiple boxes, including a stirring box, a mixing box, and a clean water box. The mixing box is connected to a conveying pipeline and is connected to the feed end of the filter press mechanism. The filter press mechanism is provided with a clean water pipeline and is connected to the water inlet end of the clean water box. The filter press mechanism is also provided with a liftable high-pressure rinsing mechanism, which is provided with multiple rinsing pipes for cleaning the filter plates.

[0009] Optionally, in one embodiment of the present invention, the filter press mechanism includes a frame structure, a pressing component, and a plurality of filter plates. The filter plates are slidably connected to the frame structure. The pressing component includes a pressing drive, a pressing plate, and a fixing plate. The fixing plate and the pressing plate are disposed on both sides of the frame structure. The pressing plate is slidably connected to the frame structure. The pressing drive is installed at one end of the frame structure and its output end is fixedly connected to the pressing plate.

[0010] Optionally, in one embodiment of the present invention, a connecting strip is provided between adjacent filter plates.

[0011] Optionally, in one embodiment of the present invention, the high-pressure flushing mechanism includes a gate-shaped bracket, a flushing pipe assembly, and a flushing pipe control component. The flushing pipe assembly and the flushing pipe control component are connected in a driving manner, the flushing pipe assembly is slidably connected to the gate-shaped bracket, and both ends of the gate-shaped bracket are slidably connected to the frame structure.

[0012] Optionally, in one embodiment of the present invention, the flushing pipe assembly includes a water outlet pipe and a connecting bracket. The water outlet pipe is fixedly installed at the lower end of the connecting bracket. The connecting bracket is slidably connected to the gate-shaped bracket. The water outlet pipe includes a first water outlet pipe located on both sides and a second water outlet pipe located in the middle.

[0013] Optionally, in one embodiment of the present invention, the flushing pipe control component includes a lifting drive and a forward / backward drive. The forward / backward drive is mounted on a connecting bracket and its output end is fixedly connected to the first water outlet pipe. The lifting drive is fixedly connected to the connecting bracket.

[0014] Optionally, in one embodiment of the present invention, a belt conveyor is provided between the filter press mechanism and the water collection tank for conveying the filtered copper powder.

[0015] Optionally, in one embodiment of the present invention, the second water outlet pipe is provided with a plurality of nozzles tilted downwards.

[0016] Optionally, in one embodiment of the present invention, the water outlet of the clean water tank is further provided with a bag filter.

[0017] Compared with the prior art, the online circulating copper powder recovery device for circuit board grinding machines provided by this utility model has the following characteristics:

[0018] It integrates structural components with various functions, enabling multiple functions, and has a compact structure with a small footprint.

[0019] The water collection tank can collect wastewater from the grinding mill, treat it, and then use a filter press to recover copper powder and recycle clean water from the clear water tank, thereby reducing wastewater discharge and treatment costs and improving resource utilization.

[0020] The mixing tank ensures that the wastewater is homogeneous and does not settle, while the mixing box adds chemicals to separate copper powder from impurities, providing purer materials for subsequent filter press and improving the purity of the final recovered copper powder.

[0021] The connecting belt, in conjunction with the plate puller, can unfold multiple filter plates at once, improving plate separation efficiency compared to the traditional method of separating them piece by piece.

[0022] The high-pressure rinsing mechanism is equipped with a liftable and movable gantry support and multiple sets of rinsing pipes, which can clean multiple filter plates in pairs simultaneously. The first and second water outlet pipes can clean the inside and outside of the filter plates. The cleaning process is automated, which improves the cleaning efficiency of the filter plates and ensures the continuous, stable and efficient operation of the filter press.

[0023] The purified water produced by pressure filtration is collected, stored, and reused after passing through a bag filter; the wastewater generated by high-pressure washing is also recycled to a mixing tank for further treatment. This achieves minimized wastewater discharge and maximized recycling of water resources. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention;

[0026] Figure 2 This is a schematic diagram of the flushing pipe assembly and filter plate in Embodiment 1 of this utility model;

[0027] Figure 3 This is a side view of the flushing pipe assembly according to Embodiment 1 of this utility model;

[0028] Reference numerals: Frame structure 1, Plate puller 101, Support column 102, Base plate 2, Mixing tank 3, Mixing box 4, Clean water tank 5, High-pressure flushing mechanism 6, Self-propelled base 601, Lifting drive 602, First water outlet pipe 603, Forward and backward drive 604, Second water outlet pipe 606, Main conveying water pump 7, Conveying pipe 701, Filter plate 8, Pulling lug structure 801, Roller 8011, Mounting block 8012, Water outlet 802, Filter cloth 803, Pressure plate 901, Guide rod 9011, Fixing plate 902, Archive 903, Water tank 904, Drainage pipe 10, Transition water tank 11, Bag filter 1101, Belt conveyor 12. Detailed Implementation

[0029] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments of the present invention can be combined with each other. The technical solutions of the present invention will be further described below with reference to the accompanying drawings of the embodiments. The present invention is not limited to the specific embodiments described below.

[0030] It should be understood that the same or similar reference numerals in the accompanying drawings of the embodiments correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "front," "rear," "left," "right," "top," and "bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms describing positional relationships in the accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0031] Example 1

[0032] Since existing filter presses require cleaning of filter plates 8 after a certain period of time, but manual cleaning is inefficient and affects equipment use, a device for quickly and automatically cleaning filter plates 8 for copper powder recovery was designed. The specific solution is as follows:

[0033] like Figure 1-3 As shown, an online circulating copper powder recovery device for a circuit board grinding machine includes: a water collection tank for collecting production line wastewater and a filter press mechanism for filtering copper powder. The filter press mechanism is installed above the water collection tank. The water collection tank is divided into multiple boxes, including a stirring tank 3, a mixing tank 4 and a clean water tank 5. The mixing tank 4 is connected to a conveying pipe 701 and is connected to the feed end of the filter press mechanism. The filter press mechanism is provided with a clean water pipe and is connected to the water inlet end of the clean water tank 5. The filter press mechanism is also provided with a liftable high-pressure rinsing mechanism 6. The high-pressure rinsing mechanism 6 is provided with multiple rinsing pipes for cleaning the filter plates 8.

[0034] The mixing tank 3 is equipped with a stirring mechanism. Wastewater generated from the production line is first transported to the mixing tank 3. The stirring mechanism keeps the wastewater flowing and prevents sedimentation. Then, the mixing tank 3 is connected to the mixing tank 4, and the stirred wastewater is transported to the mixing tank 4. Chemicals are added to the mixing tank 4 to treat the wastewater, separating copper powder from other impurities and improving the purity of the copper powder after subsequent filtration. A pipeline with a solenoid valve is connected between the mixing tank 3 and the mixing tank 4, which can transport the wastewater from the mixing tank 3 to the mixing tank 4. The main conveying water pump 7 is connected to the conveying pipe 701, which can draw the wastewater from the mixing tank 4 and transport it to the filter press for filtration. The inlet of the main conveying water pump 7 is also connected to the clear water tank 5 and is equipped with a three-way valve. When backwashing of the pipeline is required, the direction connecting to the clear water tank 5 can be opened to draw out the clear water to backwash the pipeline. The mixing tank 3, the mixing tank 4, and the clear water tank 5 are each equipped with a drain pipe 10 for emptying each tank.

[0035] The filter press mechanism includes a frame structure 1, a pressing component, and several filter plates 8. The filter plates 8 are slidably connected to the frame structure 1. The pressing component includes a pressing drive, a pressing plate 901, and a fixing plate 902. The fixing plate 902 and the pressing plate 901 are located on both sides of the frame structure 1. The pressing plate 901 is slidably connected to the frame structure 1. Multiple guide rods 9011 are provided at the rear of the pressing plate 901 to keep the pressing plate 901 moving smoothly. The pressing drive is installed at one end of the frame structure 1 and its output end is fixedly connected to the pressing plate 901. The pressing drive adopts a hydraulic cylinder. Specifically, a puller 101 is provided on the crossbeams on both sides of the frame structure 1. The filter plates 8 can be pulled apart by the puller 101. The structure of the puller 101 can refer to the puller 101 of the prior art. The frame structure 1 is also provided with an extension section above the mixing tank 3 for parking the high-pressure washing mechanism 6. It will not obstruct the area of ​​the filter plates 8, making it convenient to operate when the filter plates 8 need to be replaced, and also facilitating the maintenance of the high-pressure washing mechanism 6.

[0036] Specifically, the bottom of the water collection tank is provided with a base plate 2, and a support column 102 is provided between the filter press mechanism and the base plate 2. The lower end of the support column 102 is connected to the base plate 2, and the upper end of the support column 102 is fixedly connected to the frame structure 1.

[0037] A connecting strap is provided between adjacent filter plates 8. In this embodiment, after the pullers 101 on both sides hook onto the two sides of the first filter plate 8, the pullers 101 move back to pull the first filter plate 8. After the first filter plate 8 moves, it can drive the third filter plate 8 to move through the connecting strap, and so on, so that all the filter plates 8 can be unfolded in the end. This solution is mainly used when the number of filter plates 8 is relatively small. Compared with the existing method of separating each filter plate 8 individually, the plate separation speed is faster and can be completed in one go. When the number of filter plates 8 is large, the filter plates 8 are heavy, and the pullers 101 need to separate each filter plate 8 independently. Each side is provided with a pull ear structure 801 for hooking the plate puller 101 and sliding the filter plate 8. The connecting strap is detachably connected to the pull ear structure 801. The pull ear structure 801 is provided with an installation groove. The two ends of the connecting strap are ring-shaped structures. The installation groove is equipped with an installation block 8012. When the connecting strap is installed, the ring-shaped structure is sleeved on the installation block 8012. The installation block 8012 is fixedly connected to the installation groove with screws. The pull ear structure 801 is also provided with a vertical waist-shaped hole structure, which makes it easy to grab and remove the filter plate 8 when it is replaced. The sliding position between the pull ear structure 801 and the frame structure 1 is provided with a roller 8011, which allows the filter plate 8 to slide easily.

[0038] Each filter plate 8 has a water outlet 802 on its lower side, which can discharge water during filtration or rinsing. The frame structure 1 has an open water tank 904 near the water outlet 802 of the filter plate 8, which is used to collect water from the water outlet 802 and transport it.

[0039] The high-pressure flushing mechanism 6 includes a gantry bracket, a flushing pipe assembly, and a flushing pipe control component. The flushing pipe assembly and the flushing pipe control component are connected by a transmission mechanism, and the flushing pipe assembly is slidably connected to the gantry bracket. Both ends of the gantry bracket are slidably connected to the frame structure 1, and the lower end of the gantry bracket is slidably connected to the side beam of the frame structure 1. The lower end of the gantry bracket is provided with a self-propelled base 601. The structural principle of the self-propelled base 601 is basically the same as the walking structure of the puller 101. It moves by means of a hydraulic motor. The self-propelled base 601 enables the gantry bracket to move back and forth in a linear motion, thereby adjusting the position of the flushing pipe assembly.

[0040] The flushing pipe assembly includes a water outlet pipe and a connecting bracket. The water outlet pipe is fixedly installed at the lower end of the connecting bracket. The connecting bracket and the gate-shaped bracket are slidably connected up and down. The water outlet pipe includes a first water outlet pipe 603 located on both sides and a second water outlet pipe 606 located in the middle. Specifically, the first water outlet pipe 603 and the second water outlet pipe 606 are independently controlled water outlet pipes, and the water flushing can be controlled separately. The on / off control of the two water outlet pipes is completed through their respective connected solenoid valves.

[0041] The flushing pipe control component includes a lifting drive 602 and a forward / backward drive 604. The forward / backward drive 604 is mounted on the connecting bracket, and its output end is fixedly connected to the first water outlet pipe 603. The lifting drive 602 is fixedly connected to the connecting bracket. In this embodiment, the crossbeam of the portal frame extends outward on both sides and is provided with mounting parts. A lifting drive 602 is provided at the top of the crossbeam and the top of the mounting part, respectively. The lifting drive 602 adopts a telescopic cylinder, and each telescopic drive is connected to a flushing pipe assembly. The flushing pipe assembly located at the mounting part reduces the setup of the first water outlet pipe 603 and the forward / backward drive 604. The flushing pipe located in the middle... The assembly is symmetrically arranged with two first water outlet pipes 603 and two second water outlet pipes 606. Each of the two first water outlet pipes 603 has a forward / backward drive 604 on its upper and lower sides. The forward / backward drive 604 is a small telescopic cylinder. The forward / backward drive 604 can make the nozzle of the first water outlet pipe 603 extend into the filtrate hole at the corner of the filter plate 8 and spray water into the filter plate 8 for cleaning. At the same time, the second water outlet pipe 606 in the middle can cooperate with the second water outlet pipe 606 at the mounting part to rinse both sides of the filter plate 8 at the same time. Therefore, the rinsing pipe assembly in the middle and the rinsing pipe assembly in the mounting part can rinse the two filter plates 8 at the same time.

[0042] A belt conveyor 12 is provided between the filter press mechanism and the water collection tank to transport the filtered copper powder. A baffle with a funnel-shaped structure is also provided between the belt conveyor 12 and the filter press mechanism so that the filter cake can fall onto the belt conveyor 12 and be transported outward by the belt conveyor 12.

[0043] The second water outlet pipe 606 is equipped with multiple downward-sloping nozzles. The length of the water curtain generated by the spraying of the nozzles is greater than the length of the filter cloth 803 on the filter plate 8, so that the spraying process can cover the entire filter cloth 803 and ensure that the filter cloth 803 is cleaned.

[0044] The outlet of the clean water tank 5 is also equipped with a bag filter 1101 to intercept trace amounts of flocculent material or particles that may penetrate the filter cloth 803 of the filter press, thereby improving the cleanliness of the recycled water and preventing clogging of the grinding machine nozzle or affecting the quality of the grinding plate. In this embodiment, the bag filter 1101 includes a transition water tank 11 and a filter bag. The filter bag is placed inside the transition water tank 11, and the clean water filtered by the filter bag is temporarily stored in the transition water tank 11. The transition water tank 11 is connected to a recycled water pump, which draws clean water for reuse.

[0045] Working principle:

[0046] Wastewater treatment: Wastewater generated on the production line is first transported to the mixing tank 3. The mixing mechanism is operated to make the wastewater flow. Then the wastewater is transferred to the mixing tank 4 through the pipeline. In the mixing tank 4, chemicals are added to perform preliminary treatment on the wastewater. The treated wastewater is pumped to the filter press by the main conveying water pump 7. At this time, the filter press is in the pressing state. During the filter press process, the clean water generated is transported to the clean water tank 5 through the water tank 904. Multiple filter plates 8 are separated by the plate puller 101. If rinsing is required, the high-pressure rinsing mechanism 6 can be controlled to perform the rinsing operation.

[0047] Washing operation: Two filter plates 8 form a group. The high-pressure washing mechanism 6 moves above the first group of filter plates 8. The washing pipe assembly is lowered to the lowest position by the lifting drive 602. The first water outlet pipe 603 is aligned with the filtrate hole of the filter plate 8. Then, the nozzle of the first water outlet pipe 603 is inserted into the filtrate hole by the forward and backward drive 604 to spray water into the filter plate 8 for washing. After washing, the first water outlet pipe 603 is closed. Then, the washing pipe assembly is raised and lowered by the lifting drive 602. At the same time, the second water outlet pipe 606 is opened to perform high-pressure washing on both sides of the filter plate 8. After washing, the high-pressure washing mechanism 6 moves above the next group of filter plates 8 and performs washing operation on the next group of filter plates 8. The wastewater generated by washing can be transported back to the mixing tank 4 through the water tank 904 for reprocessing.

[0048] The copper powder recovery device in this solution is equipped with a variety of structural components with different functions, resulting in high equipment integration, a compact structure, and a small footprint.

[0049] This system enables online collection, treatment, copper powder recovery, and clean water recycling of wastewater from grinding mills, reducing wastewater discharge and treatment costs, and improving resource utilization.

[0050] The mixing tank 3 ensures that the wastewater is homogeneous and does not settle, while the mixing tank 4 adds chemicals to separate copper powder from impurities, providing purer materials for subsequent pressure filtration and improving the purity of the final recovered copper powder.

[0051] The connecting belt, together with the plate puller 101, can unfold multiple filter plates 8 at once, which improves the plate separation efficiency compared with the traditional method of separating them piece by piece. The liftable and movable gate-shaped bracket, together with multiple sets of flushing pipes, enables the grouped synchronous cleaning of the filter plates 8. The first water outlet pipe 603 and the second water outlet pipe 606 can complete the cleaning of the inside and outside of the filter plates 8. The cleaning process is automatically controlled, which improves the cleaning efficiency of the filter plates 8 and ensures the continuous, stable and efficient operation of the filter press.

[0052] The clean water produced by pressure filtration is collected, stored, and reused after passing through bag filter 1101; the wastewater generated by high-pressure washing is also recycled to mixing tank 4 for further treatment. This achieves minimized wastewater discharge and maximized recycling of water resources.

[0053] Example 2

[0054] In this embodiment, the structure of the recycling device is basically the same as that of Embodiment 1. The difference is that the forward and backward drive 604 is eliminated, and a non-powered mechanical structure design is adopted to realize the forward and backward movement of the first water outlet pipe 603. A return spring is connected between the first water outlet pipe 603 and the connecting frame. The upper and lower ends of the first water outlet pipe 603 are slidably connected to the connecting frame. A trapezoidal fixing block is provided on the upper part of the first water outlet pipe 603. A guide slider is provided on the portal bracket. After the fixing block contacts the guide slider, the first water outlet pipe 603 can move forward to extend the nozzle on the pipe into the filtrate hole of the filter plate 8. After rinsing, the first water outlet pipe 603 can be moved backward by the return spring to return to its original position.

[0055] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. An online circulating copper powder recovery device for a circuit board grinding machine, characterized in that, include: A water collection tank for collecting production line wastewater and a filter press mechanism for filtering copper powder are provided. The filter press mechanism is installed above the water collection tank. The water collection tank is divided into multiple chambers, including a stirring chamber, a mixing chamber, and a clean water chamber. The mixing chamber is connected to a conveying pipeline and is connected to the feed end of the filter press mechanism. The filter press mechanism is provided with a clean water pipeline and is connected to the water inlet end of the clean water chamber. The filter press mechanism is also provided with a liftable high-pressure rinsing mechanism, which has multiple rinsing pipes for cleaning the filter plates.

2. The device according to claim 1, wherein the device is characterized by: The filter press mechanism includes a frame structure, a pressing component, and several filter plates. The filter plates are slidably connected to the frame structure. The pressing component includes a pressing drive, a pressing plate, and a fixing plate. The fixing plate and the pressing plate are located on both sides of the frame structure. The pressing plate is slidably connected to the frame structure. The pressing drive is installed at one end of the frame structure and its output end is fixedly connected to the pressing plate.

3. The apparatus according to claim 1, wherein the apparatus is characterized by: A connecting belt is provided between adjacent filter plates.

4. The apparatus according to claim 1, wherein the apparatus is characterized by: The high-pressure flushing mechanism includes a gantry bracket, a flushing pipe assembly, and a flushing pipe control component. The flushing pipe assembly and the flushing pipe control component are connected by a drive, and the flushing pipe assembly is slidably connected to the gantry bracket. Both ends of the gantry bracket are slidably connected to the frame structure.

5. The apparatus according to claim 4, wherein the apparatus is characterized by: The flushing pipe assembly includes a water outlet pipe and a connecting bracket. The water outlet pipe is fixedly installed at the lower end of the connecting bracket. The connecting bracket is slidably connected to the gate-shaped bracket. The water outlet pipe includes a first water outlet pipe located on both sides and a second water outlet pipe located in the middle.

6. The apparatus according to claim 4, wherein the apparatus is characterized by: The flushing pipe control component includes a lifting drive and a forward / backward drive. The forward / backward drive is mounted on a connecting bracket and its output end is fixedly connected to the first water outlet pipe. The lifting drive is fixedly connected to the connecting bracket.

7. The apparatus according to claim 1, wherein the apparatus is characterized by: A belt conveyor is provided between the filter press and the water collection tank to transport the filtered copper powder.

8. The apparatus according to claim 5, wherein the apparatus is characterized by: The second water outlet pipe is equipped with multiple nozzles that are tilted downwards.

9. The apparatus according to claim 1, wherein the apparatus is characterized by: The water outlet of the clean water tank is also equipped with a bag filter.

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