Pressure crater grinder

Abstract

The application discloses a press pit preventing grinding machine, which comprises a machine body and a plurality of protection plates arranged on the machine body. The machine body is provided with a grinding mechanism, a conveying mechanism and a plurality of rubber rollers. The conveying mechanism and the plurality of rubber rollers are arranged one above another and are used for conveying a circuit board from back to front. The grinding mechanism is arranged between two adjacent rubber rollers and can abut on the circuit board to grind the circuit board. The plurality of protection plates form a semi-enclosing structure which is arranged around the plurality of rubber rollers to prevent debris from splashing onto the rubber rollers. The front end and the rear end of the semi-enclosing structure are both provided with flexible plates which can abut on the circuit board on the conveying mechanism to prevent debris from entering the semi-enclosing structure, avoid the splashing of the debris onto the rubber rollers, further avoid the pressing of the debris on the circuit board, avoid the generation of pits on the circuit board, and ensure the grinding quality of the circuit board.

Description

Technical Field

[0001] This invention relates to the field of PCB technology, and in particular to an anti-dent grinding machine. Background Technology

[0002] During PCB manufacturing, circuit boards often contain impurities such as stains and oxide layers. Furthermore, the copper plating requires high thickness and flatness. These impurities can be addressed through grinding processes, such as using grinding machines or board brushing machines. However, current grinding machines often use rubber rollers that pick up debris generated during grinding. As the rollers rotate, this debris presses against the circuit board, creating indentations. This results in substandard circuit board quality, significantly impacting yield and increasing production costs. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention proposes an anti-denting grinding machine, which can prevent dents from being pressed into circuit boards.

[0004] According to an embodiment of the present invention, an anti-dent grinding machine includes a machine body and multiple protective plates disposed on the machine body. The machine body is provided with a grinding mechanism, a conveying mechanism, and multiple rubber rollers. The conveying mechanism and the multiple rubber rollers are arranged one above the other. The conveying mechanism and the multiple rubber rollers are used to convey circuit boards from back to front. The grinding mechanism is disposed between two adjacent rubber rollers and can abut against the circuit board to grind the circuit board. Several protective plates form a semi-enclosed structure, which surrounds several rubber rollers. The front and rear ends of the semi-enclosed structure are provided with flexible plates. The flexible plates can abut against the circuit board on the conveying mechanism to separate the grinding mechanism and the rubber rollers, to prevent debris from splashing onto the rubber rollers, and to prevent the debris from entering the semi-enclosed structure.

[0005] It has at least the following beneficial effects: the rubber roller positions the circuit board against the conveying mechanism, and the combined action of the conveying mechanism and the rubber roller moves the circuit board from back to front. When the circuit board passes the area corresponding to the grinding mechanism, the grinding mechanism presses against the circuit board and grinds it. The semi-enclosed structure prevents the debris generated by the grinding mechanism from splashing onto the rubber roller, thus preventing debris adhering to the rubber roller from pressing onto the circuit board, avoiding pits on the circuit board, and ensuring the grinding quality of the circuit board.

[0006] According to some embodiments of the present invention, on the same semi-enclosed structure, the opposite end faces of two adjacent protective plates are provided with overlapping portions, and the two overlapping portions are arranged one above the other to cover the gap between the two adjacent protective plates.

[0007] According to some embodiments of the present invention, on the same semi-enclosed structure, the lower overlapping portion forms a flow channel for temporarily storing and guiding the cleaning fluid and the debris.

[0008] According to some embodiments of the present invention, the conveying mechanism includes a roller conveyor, which includes a plurality of conveying rollers arranged side by side from back to front. The rubber rollers are arranged above the conveying rollers in a one-to-one correspondence. Two semi-enclosed structures are arranged vertically, and the two semi-enclosed structures are respectively arranged around the several rubber rollers and several conveying rollers that are vertically corresponding to each other, so as to separate the grinding mechanism and the rubber rollers.

[0009] According to some embodiments of the present invention, the conveying mechanism includes a first belt conveyor, and a plurality of rubber rollers are arranged side by side from back to front above the first belt conveyor, and the semi-enclosed structure partially surrounds a plurality of the rubber rollers.

[0010] According to some embodiments of the present invention, the conveying mechanism further includes a second belt conveyor, the first belt conveyor and the second belt conveyor are distributed in the front-back direction and staggered vertically, and a plurality of rubber rollers arranged in parallel from back to front are also provided below the second belt conveyor, and the rubber rollers below the second belt conveyor are surrounded by another semi-enclosed structure portion.

[0011] According to some embodiments of the present invention, the machine body is provided with an inner cavity, and the front and rear ends of the machine body are respectively provided with an outlet and an inlet. The input end of the conveying mechanism extends to the rear of the machine body through the inlet, and the output end of the conveying mechanism extends to the front of the machine body through the outlet.

[0012] According to some embodiments of the present invention, the inner cavity is provided with a spraying mechanism facing the grinding mechanism, and the bottom of the inner cavity is provided with a waste liquid collection tank.

[0013] According to some embodiments of the present invention, the grinding mechanism includes a plurality of grinding rollers that are vertically and flexibly disposed within the inner cavity. The grinding rollers are disposed opposite to the conveying mechanism, and the grinding rollers can press the circuit board against the conveying mechanism to grind the surface of the circuit board.

[0014] According to some embodiments of the present invention, the two ends of the protective plate are detachably connected to the left and right inner walls of the inner cavity, respectively.

[0015] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0017] Figure 1 This is a schematic diagram of the anti-dent grinding machine according to an embodiment of the present invention;

[0018] Figure 2 This is a cross-sectional view of the anti-dent grinding machine according to an embodiment of the present invention;

[0019] Figure 3 for Figure 2 A magnified view of a portion of point A in the middle;

[0020] Figure 4 This is a cross-sectional view of another embodiment of the anti-dent grinding machine of the present invention;

[0021] Figure 5 for Figure 4 A magnified view of a portion of point B in the middle;

[0022] Reference numerals in the attached diagram: Body 100, Outlet 110, Inlet 120, Waste liquid collection tank 130, Grinding mechanism 200, Grinding roller 210, Conveying mechanism 300, Conveying roller 310, First belt conveyor 320, Second belt conveyor 330, Rubber roller 400, Protective plate 500, Flexible plate 600, Guide channel 700, Spraying mechanism 800. Detailed Implementation

[0023] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0024] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this 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. Therefore, they should not be construed as limiting this invention.

[0025] In the description of this invention, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features or their sequential relationship.

[0026] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0027] Reference Figure 1 and Figure 2 This invention discloses an anti-dent grinding machine, comprising a machine body 100 and multiple protective plates 500 disposed on the machine body 100. The machine body 100 is provided with a grinding mechanism 200, a conveying mechanism 300, and multiple rubber rollers 400. The conveying mechanism 300 and the multiple rubber rollers 400 are arranged one above the other. Both the conveying mechanism 300 and the multiple rubber rollers 400 are used to convey circuit boards from back to front. The grinding mechanism 200 is disposed between two adjacent rubber rollers 400 and can abut against the circuit board to grind the circuit board. The rubber rollers 400 serve to position the circuit board against the conveying mechanism 300. The conveying mechanism 300 and the rubber rollers 400 work together to move the circuit board from back to front. When the circuit board passes through the area corresponding to the grinding mechanism 200, the grinding mechanism 200 abuts against the circuit board and grinds the circuit board.

[0028] Reference Figure 2 and Figure 3 Several protective plates 500 form a semi-enclosed structure, which surrounds several rubber rollers 400. The semi-enclosed structure serves to block the flying debris generated by the grinding mechanism 200 grinding the circuit board, preventing the debris from flying onto the rubber rollers 400. Flexible plates 600 are provided at the front and rear ends of the semi-enclosed structure. The flexible plates 600 can abut against the circuit board on the conveying mechanism 300. The flexible plates 600 serve to block the debris from entering the semi-enclosed structure, preventing the debris from sticking to the rubber rollers 400, and thus preventing the debris stuck to the rubber rollers 400 from pressing onto the circuit board, avoiding the formation of pits on the circuit board, and ensuring the grinding quality of the circuit board.

[0029] The semi-enclosed structure is formed by combining several protective plates 500. In other words, the semi-enclosed structure is a split structure, which allows the shape of the semi-enclosed structure to be adjusted at any time according to the surrounding conditions of the rubber roller 400. This makes the shape of the semi-enclosed structure more flexible and versatile, easy to install, and also protects the rubber roller 400 well, separating the rubber roller 400 from the grinding mechanism 200.

[0030] The semi-enclosed structure is a split structure. The adjacent protective plates 500 can be connected in a seamless or gapped manner. The seamless connection means that the adjacent protective plates 500 are fixed together. When repairing or replacing the semi-enclosed structure, it is necessary to disassemble several protective plates 500 that make up the semi-enclosed structure. The gapped connection means that the adjacent protective plates 500 can be connected by detachable connectors or set up relative to each other without connectors.

[0031] Reference Figure 2 and Figure 3It is understood that the machine body 100 has an inner cavity, and the conveying mechanism 300 and multiple rubber rollers 400 are all located within the inner cavity. Since the grinding mechanism 200 is located between two adjacent rubber rollers 400, the grinding mechanism 200 divides all the rubber rollers 400 into several groups, each group having several rubber rollers 400. The length of the rubber rollers 400 extends in the left-right direction, and all the rubber rollers 400 in each group are arranged side-by-side in the front-back direction. A group is surrounded by a semi-enclosed structure, and the semi-enclosed structure and the conveying mechanism 300 enclose all the rubber rollers 400 in a group.

[0032] In some embodiments, for a semi-enclosed structure having two or more protective plates 500, the opposite end faces of two adjacent protective plates 500 on the same semi-enclosed structure are provided with overlapping portions. The two overlapping portions are arranged one above the other to block the gap between the two adjacent protective plates 500, preventing debris from easily falling into the gap between the two adjacent protective plates 500 from top to bottom or flying into the gap between the two adjacent protective plates 500 from bottom to top, thereby preventing debris from falling onto the rubber roller 400.

[0033] See Figure 3 In some embodiments, on the same half-enclosing structure, the lower overlapping portion forms a guide groove 700. When debris passes through the gap between the two protective plates 500, the debris will fall onto the guide groove 700. The guide groove 700 is used to temporarily store and guide the debris, preventing the debris from falling onto the rubber roller 400.

[0034] Reference Figure 2 and Figure 3 In some embodiments, the conveying mechanism 300 includes a roller conveyor, which includes a plurality of conveying rollers 310 arranged side by side from back to front. Rubber rollers 400 are positioned above the conveying rollers 310, corresponding one-to-one in top and bottom. Two semi-enclosed structures are arranged vertically, each surrounding one of the corresponding rubber rollers 400 and conveying rollers 310. These semi-enclosed structures completely surround the rubber rollers 400 and conveying rollers 310 to prevent debris from splashing onto them. The semi-enclosed structures not only cover the rubber rollers 400 from above but also surround the bottom of the conveying rollers 310, effectively isolating them from the grinding mechanism 200.

[0035] Roller conveyors are a common type of conveying mechanism, and will not be described in detail here. Grinding mechanisms 200 can be installed at both the top and bottom of the roller conveyor. When the roller conveyor and rubber roller 400 are used to convey circuit boards, the grinding mechanisms 200 at the top and bottom respectively grind the upper and lower surfaces of the circuit board.

[0036] See Figure 4 and Figure 5In some embodiments, the conveying mechanism 300 includes a first belt conveyor 320, with multiple rubber rollers 400 arranged side-by-side from back to front above the first belt conveyor 320. A semi-enclosed structure is positioned above the rubber rollers 400, partially enclosing them. In other words, the semi-enclosed structure covers the rubber rollers 400. The semi-enclosed structure and the first belt conveyor 320 surround the rubber rollers 400 above the first belt conveyor 320, protecting them and preventing debris from splashing onto them. The circuit board is conveyed on the first belt conveyor 320. A grinding mechanism 200 is located above the first belt conveyor 320, pressing against the upper surface of the circuit board and grinding the upper surface of the circuit board.

[0037] In some embodiments, the conveying mechanism 300 further includes a second belt conveyor 330. The first belt conveyor 320 and the second belt conveyor 330 are distributed in the front-back direction and staggered vertically. Below the second belt conveyor 330, there are also a plurality of rubber rollers 400 arranged side by side from back to front. The rubber rollers 400 lift up the circuit board and make the circuit board abut against the lower surface of the second belt conveyor 330. When the second belt conveyor 330 is working, the second belt conveyor 330 drives the circuit board forward. The rubber rollers 400 below the second belt conveyor 330 are partially surrounded by another half-enclosing structure. The second belt conveyor 330 and the other half-enclosing structure surround the rubber rollers 400 below the second belt conveyor 330, which protects the rubber rollers 400 below the second belt conveyor 330 and prevents debris from splashing onto the rubber rollers 400. The circuit board is conveyed on the second belt conveyor 330. Another grinding mechanism 200 is provided below the second belt conveyor 330. The other grinding mechanism 200 abuts against the lower surface of the circuit board and grinds the lower surface of the circuit board.

[0038] See Figure 2 and Figure 4 In some embodiments, the machine body 100 has an inner cavity, and the front and rear ends of the machine body 100 are respectively provided with an outlet 110 and an inlet 120. The input end of the conveying mechanism 300 extends to the rear of the machine body 100 through the inlet 120, and the output end of the conveying mechanism 300 extends to the front of the machine body 100 through the outlet 110. The circuit board is unloaded and loaded at the front and rear of the machine body 100 without opening the machine body 100, which is convenient for operation.

[0039] In some embodiments, the inner cavity is provided with a spray mechanism 800 facing the grinding mechanism 200. The spray mechanism 800 sprays oil towards the grinding mechanism 200 and the circuit board near the grinding mechanism 200 to cool the grinding mechanism 200 and the circuit board, which is beneficial to the grinding of the circuit board. The bottom of the inner cavity is provided with a waste liquid collection tank 130. After the oil washes the grinding mechanism 200 and the circuit board, it forms waste liquid. Under the action of gravity, the waste liquid falls onto the waste liquid collection tank 130, which collects the waste liquid and drains it away.

[0040] The spraying mechanism 800 includes a liquid pump, a liquid storage tank, a liquid delivery pipe, and multiple nozzles. One end of the liquid delivery pipe is located in the liquid storage tank, and the other end is connected to and communicates with all the nozzles. The liquid pump is located on the liquid delivery pipe. The nozzles are located in the inner cavity and face the grinding mechanism 200. Waste liquid may carry debris and splash onto the protective plate 500 and flow into the guide channel 700. The guide channel 700 serves to guide the waste liquid and debris, preventing the waste liquid and debris from falling onto the rubber roller 400.

[0041] In some embodiments, the grinding mechanism 200 includes a plurality of grinding rollers 210 that are vertically and flexibly disposed within the inner cavity. The grinding rollers 210 are disposed opposite to the conveying mechanism 300. When the grinding rollers 210 rise or fall, they move closer to or away from the conveying mechanism 300. When the grinding rollers 210 are close to the conveying mechanism 300, they can press the circuit board against the conveying mechanism 300. The gap between the grinding rollers 210 and the conveying mechanism 300 can be adjusted according to the thickness of the circuit board, thereby controlling the degree of grinding of the circuit board.

[0042] It should be understood that the conveying mechanism 300 and the grinding mechanism 200 are arranged one above the other, so that when the grinding roller 210 rises or falls, the grinding roller 210 moves closer to or further away from the conveying mechanism 300.

[0043] The grinding roller 210 is slidably and rotatably connected to the machine body 100. When the rotating grinding roller 210 abuts against the circuit board, it grinds the surface of the circuit board. The grinding mechanism 200 also includes a lifting drive mechanism. The output end of the lifting drive mechanism is provided with a mounting plate. The grinding roller 210 is rotatably mounted on the mounting plate, and its length extends in the left-right direction. The grinding mechanism 200 also includes a motor mounted on the mounting plate. The motor is connected to the grinding roller 210 for transmission, and drives the grinding roller 210 to rotate.

[0044] In some embodiments, the two ends of the protective plate 500 are detachably connected to the left and right inner walls of the inner cavity, respectively, to facilitate the installation and removal of the protective plate 500. The ends of the protective plate 500 can be connected to the left and right inner walls of the inner cavity by bolts or screws, that is, the ends of the protective plate 500 are connected to the body 100.

[0045] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0046] Of course, the present invention is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. An anti-dent grinding machine, characterized in that, include: The machine body is provided with a grinding mechanism, a conveying mechanism and multiple rubber rollers. The conveying mechanism and the multiple rubber rollers are arranged one above the other. The conveying mechanism and the multiple rubber rollers are used to convey the circuit board from back to front. The grinding mechanism is located between two adjacent rubber rollers and can abut against the circuit board to grind the circuit board. Multiple protective plates are provided on the machine body, and several of the protective plates form a semi-enclosed structure. The semi-enclosed structure surrounds several rubber rollers. The grinding mechanism divides all the rubber rollers into several groups, and each group has several rubber rollers. The length direction of the rubber rollers extends in the left-right direction. All the rubber rollers in each group are arranged side by side in the front-back direction. A group is surrounded by a semi-enclosed structure. A semi-enclosed structure and the conveying mechanism surround all the rubber rollers in a group. The front and rear ends of the semi-enclosed structure are provided with flexible plates. The flexible plates can abut against the circuit board on the conveying mechanism to separate the grinding mechanism and the rubber rollers. On the same semi-enclosed structure, the opposite end faces of two adjacent protective plates are provided with overlapping portions, and the two overlapping portions are arranged one above the other to cover the gap between the two adjacent protective plates. On the same semi-enclosed structure, the lower overlapping portion forms a flow channel for temporarily storing and guiding cleaning fluid and debris.

2. The anti-dent grinding machine according to claim 1, characterized in that: The conveying mechanism includes a roller conveyor, which includes a plurality of conveying rollers arranged side by side from back to front. The rubber rollers are arranged above the conveying rollers in a one-to-one correspondence. Two semi-enclosed structures are arranged vertically, and the two semi-enclosed structures are respectively arranged around the several rubber rollers and several conveying rollers that are vertically and vertically corresponding, so as to separate the grinding mechanism and the rubber rollers.

3. The anti-dent grinding machine according to claim 1, characterized in that: The conveying mechanism includes a first belt conveyor, and a plurality of rubber rollers are arranged side by side from back to front above the first belt conveyor, with the semi-enclosed structure partially surrounding the rubber rollers.

4. The anti-dent grinding machine according to claim 3, characterized in that: The conveying mechanism also includes a second belt conveyor. The first belt conveyor and the second belt conveyor are distributed along the front-back direction and staggered vertically. A plurality of rubber rollers are arranged side by side from back to front below the second belt conveyor. The rubber rollers below the second belt conveyor are surrounded by another semi-enclosed structure.

5. The anti-dent grinding machine according to claim 1, characterized in that: The machine body has an inner cavity, and the front and rear ends of the machine body are respectively provided with an outlet and an inlet. The input end of the conveying mechanism extends to the rear of the machine body through the inlet, and the output end of the conveying mechanism extends to the front of the machine body through the outlet.

6. The anti-dent grinding machine according to claim 5, characterized in that: The inner cavity is provided with a spray mechanism facing the grinding mechanism, and the bottom of the inner cavity is provided with a waste liquid collection tank.

7. The anti-dent grinding machine according to claim 5, characterized in that: The grinding mechanism includes a plurality of grinding rollers that are vertically and vertically disposed within the inner cavity. The grinding rollers are disposed opposite to the conveying mechanism. The grinding rollers can press the circuit board against the conveying mechanism to grind the surface of the circuit board.

8. The anti-dent grinding machine according to claim 5, characterized in that: The two ends of the protective plate are detachably connected to the left and right inner walls of the inner cavity, respectively.

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