Board surface cleaning device for PCB production

Abstract

The invention relates to the technical field of circuit board production, in particular to a board surface cleaning device for PCB (printed circuit board) production, which comprises a machine body and an accommodating chamber, a mounting frame is slidably arranged in the accommodating chamber, and two cleaning rollers for cleaning PCBs conveyed on a conveying mechanism are rotatably arranged in the mounting frame; a driving mechanism is arranged on the side, inside the machine body, of the mounting frame, and a guiding mechanism is arranged on the side, outside the machine body, of the mounting frame. By arranging the driving mechanism and the guiding mechanism, the cleaning roller axially slides in a reciprocating mode while rotating in the circumferential direction, the cleaning roller can axially move back and forth while rotating, the contact track of bristles is a spiral and reciprocating complex path, the whole plate surface can be evenly covered, and the cleaning effect is improved. Comprising areas which are easy to neglect such as edges, corners and tiny gaps between circuits of the PCB, dead angles are thoroughly eliminated and cleaned, meanwhile, adhesive force between impurities and a board surface is damaged, and stubborn impurities are more easily stripped from the board surface compared with single rotating motion.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit board production, in particular to a board surface cleaning device for PCB circuit board production. Background Art

[0002] The board cleaning device used in PCB circuit board production is a key equipment to ensure the stable quality of PCB boards in subsequent processes such as etching, welding, and lamination. Its core function is to remove pollutants such as dust, metal debris, flux residue, fiber impurities, etc. on the board surface to avoid problems such as short circuits, poor welding, or insufficient bonding due to impurities.

[0003] A board surface cleaning device for PCB circuit board production and processing disclosed in Chinese patent publication number CN222385499U, which uses a rotating brush to contact the PCB board surface to brush off impurities such as dust and debris on the surface, and simultaneously cooperates with a dust suction device to suck away the brushed impurities; however, according to the board surface cleaning device for PCB production and processing provided in the related field and the existing technology, when simply rotating circumferentially, the contact trajectory of the bristles of the brush roller with the board surface is a ring or spiral line, which easily forms repeated coverage areas and missed brushing areas in the axial direction of the board surface. The residual impurities in these missed brushing areas may cause circuit short circuits or poor bonding in subsequent processes, affecting the quality of the PCB finished product. Summary of the Invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art, solve the problems mentioned in the background art, and provide a board surface cleaning device for PCB circuit board production.

[0005] The objectives of the present invention are achieved through the following technical solutions: A board surface cleaning device for PCB circuit board production, comprising a body, a transmission channel is provided inside the body, a transmission mechanism for transmitting various types of PCB circuit boards is installed inside the transmission channel, a accommodating chamber is provided on the body above the transmission channel, a mounting frame is provided inside the accommodating chamber for sliding, two cleaning rollers for cleaning the PCB circuit boards transported on the transmission mechanism are rotatably provided inside the mounting frame; a driving mechanism for controlling the circumferential rotation of the cleaning rollers is provided on one side of the mounting frame located inside the body, and a guiding mechanism for cooperating with the driving mechanism to allow the cleaning rollers to slide axially while rotating circumferentially is provided on the side of the mounting frame located outside the body.

[0006] Preferably, the driving mechanism includes a motor fixedly mounted on the mounting frame, the output end of the motor passes through the mounting frame and a first turntable is fixedly mounted inside the mounting frame, a first spline shaft is fixedly provided at one end of the first turntable away from the motor, a second turntable is slidingly provided on the outer surface of the first spline shaft, an elastic member is fixed between the second turntable and the first turntable, and a first connector is fixed at one end of the second turntable away from the first turntable.

[0007] Preferably, the guiding mechanism includes a second spline shaft rotatably connected to the mounting bracket, a third turntable is slidably provided on the outer surface of the second spline shaft, a second connector is fixedly provided on a side of the third turntable facing the second turntable, a plurality of first balls are provided on a side of the third turntable away from the second connector, a fixing ring is movably connected to a side of the mounting bracket close to the third turntable, second balls are provided on positions of the fixing ring corresponding to the plurality of first balls, and an adjusting component is provided on the mounting bracket for controlling the axial sliding of the fixing ring along the second spline shaft.

[0008] Preferably, the adjustment assembly includes a screw rod threadedly connected to the mounting bracket, a knob is fixedly mounted on one end of the screw rod located outside the mounting bracket, and an end of the screw rod away from the knob is rotatably connected to the fixing ring.

[0009] Preferably, the fixing ring is located above the screw rod and fixedly mounted with a scale, the mounting bracket is provided with a sliding hole at a position corresponding to the scale, and the mounting bracket is provided with a threaded hole corresponding to the screw rod.

[0010] Preferably, the fixing ring is provided with a first rotating hole at the end of the screw rod, and the screw rod is connected to the first rotating hole through a bearing.

[0011] Preferably, the cross-sections of the first connector and the second connector are both hexagonal, the cleaning roller is a brush roller, and a connecting hole adapted to the first connector and the second connector is provided at the center of the cleaning roller.

[0012] Preferably, the number of the first balls is the same as the number of the second balls, the mounting frame is located at one end of the second spline shaft and is provided with a second rotation hole, and the second spline shaft is connected to the second rotation hole through a bearing.

[0013] Preferably, the elastic member is a spring, and the elastic member is sleeved on the outer surface of the first spline shaft.

[0014] Preferably, the mounting frame is provided with an impurity adhesion roller above the two cleaning rollers, an electrostatic removal mechanism is provided at the entrance of the transmission channel, and a dust collection system is provided inside the transmission channel above the two cleaning rollers.

[0015] The beneficial effects of the board surface cleaning device for PCB circuit board production are as follows: by providing a driving mechanism and a guiding mechanism, the cleaning roller can slide back and forth axially while rotating circumferentially, and the cleaning roller can move back and forth axially while rotating, so that the contact track of the bristles presents a complex spiral and reciprocating path, which can evenly cover the entire board surface, including easily overlooked areas such as the edges, corners, and tiny gaps between circuits of the PCB board, completely eliminating cleaning dead corners, and at the same time destroying the adhesion between impurities and the board surface, making it easier to peel stubborn impurities from the board surface than a single rotational motion. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 Schematic diagram of the structure of the transmission channel of the present invention;

[0019] Figure 3 It is a structural schematic diagram of the transmission mechanism of the present invention;

[0020] Figure 4 This is a schematic diagram of the state where the mounting bracket of the present invention is pulled out;

[0021] Figure 5 This is a schematic structural diagram of the mounting bracket of the present invention from a first perspective;

[0022] Figure 6 A schematic structural diagram of the mounting bracket of the present invention from a second viewing angle;

[0023] Figure 7 For the present invention Figure 6 A schematic diagram of the structure at point A in the middle;

[0024] Figure 8 This is a schematic structural diagram of the second working state of the fixing ring of the present invention;

[0025] Figure 9 It is a structural schematic diagram of the cleaning roller of the present invention;

[0026] Figure 10 It is a schematic diagram of the separated structure of the driving mechanism, the guiding mechanism and the cleaning roller of the present invention.

[0027] In the figure: 1. Body; 2. Transmission channel; 201. Electrostatic removal mechanism; 3. Transmission mechanism; 4. Accommodating chamber; 5. Mounting frame; 501. Impurity adhesion roller; 6. Cleaning roller; 601. Connecting hole; 7. Driving mechanism; 701. Motor; 702. First turntable; 703. First spline shaft; 704. Second turntable; 705. Elastic member; 706. First connector; 8. Guide mechanism; 801. Second spline shaft; 802. Third turntable; 803. Second connector; 804. First ball; 805. Fixing ring; 806. Second ball; 9. Adjusting assembly; 901. Screw; 902. Knob; 903. Scale. DETAILED DESCRIPTION

[0028] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0029] Additional aspects and advantages of the present invention will be further given in the following description in conjunction with the accompanying drawings, and in part will become apparent from the following description, or may be learned through practice of the present invention.

[0030] like Figures 1 to 10 As shown, a board surface cleaning device for PCB circuit board production includes a body 1, a transmission channel 2 is opened inside the body 1, and a transmission mechanism 3 for transmitting various types of PCB circuit boards is installed inside the transmission channel 2; the body 1 is provided with a accommodating chamber 4 above the transmission channel 2, and a mounting frame 5 is slidingly provided inside the accommodating chamber 4, and two cleaning rollers 6 for cleaning the PCB circuit boards conveyed on the transmission mechanism 3 are rotatably provided inside the mounting frame 5; a driving mechanism 7 for controlling the circumferential rotation of the cleaning rollers 6 is provided on one side of the mounting frame 5 located inside the body 1, and a guiding mechanism 8 for cooperating with the driving mechanism 7 to allow the cleaning rollers 6 to slide back and forth axially while rotating circumferentially is provided on the side of the mounting frame 5 located outside the body 1.

[0031] In summary, the cleaning roller 6 performs axial reciprocating sliding while rotating in the circumferential direction:

[0032] First, the cleaning roller 6 can be rotated and moved back and forth along the axial direction at the same time, so that the contact track of the bristles presents a complex spiral and reciprocating path, which can evenly cover the entire board surface, including the edges, corners, and tiny gaps between circuits of the PCB board, which are easily overlooked areas, completely eliminating blind spots in cleaning;

[0033] Secondly, the circumferential rotation provides radial friction, while the axial reciprocating sliding provides axial shear force. The two form a cross friction force. The bristles will repeatedly act on the impurities from different directions, destroying the adhesion between the impurities and the board surface. Compared with a single rotational motion, it is easier to remove stubborn impurities from the board surface.

[0034] Thirdly, the axial reciprocating sliding can disrupt the accumulation trend of impurities through axial movement: the bristles will redisperse the accumulated impurities when moving axially, and then suck them away through rotating friction and the coordinated dust collection system, reducing the secondary residue of impurities on the board surface.

[0035] The driving mechanism 7 includes a motor 701 fixedly mounted on the mounting frame 5. The output end of the motor 701 passes through the mounting frame 5 and a first turntable 702 is fixedly mounted inside the mounting frame 5. A first spline shaft 703 is fixedly provided at the end of the first turntable 702 away from the motor 701. A second turntable 704 is slidingly provided on the outer surface of the first spline shaft 703. An elastic member 705 is fixed between the second turntable 704 and the first turntable 702. The elastic member 705 is a spring. The elastic member 705 is sleeved on the outer surface of the first spline shaft 703. A first connector 706 is fixed at the end of the second turntable 704 away from the first turntable 702.

[0036] The guiding mechanism 8 includes a second spline shaft 801 rotatably connected to the mounting bracket 5. The mounting bracket 5 is provided with a second rotating hole at one end of the second spline shaft 801. The second spline shaft 801 is matched with the second rotating hole through a bearing. The above-mentioned bearing can reduce the friction force when the second spline shaft 801 rotates, and improve the stability of the second spline shaft 801 when rotating. The outer surface of the second spline shaft 801 is slidingly provided with a third turntable 802. The side of the third turntable 802 facing the second turntable 704 is fixed with a second connector 803. The side of the third turntable 802 away from the second connector 803 is provided with a plurality of third connectors. A ball 804, a fixing ring 805 is movably connected to the side of the mounting frame 5 close to the third turntable 802, and a second ball 806 is provided at the position of the fixing ring 805 corresponding to the multiple first balls 804. The number of the first balls 804 and the second balls 806 is the same. The mounting frame 5 is provided with an adjustment component 9 for controlling the axial sliding of the fixing ring 805 along the second spline shaft 801. The cross-sections of the first connector 706 and the second connector 803 are both hexagonal. The cleaning roller 6 is a brush roller, and a connecting hole 601 compatible with the first connector 706 and the second connector 803 is provided at the center of the cleaning roller 6.

[0037] In summary, when the third rotating disk 802 rotates circumferentially, the first balls 804 and the second balls 806 are provided, and when the first balls 804 come into contact with the second balls 806, the third rotating disk 802 is squeezed by the force and forces the cleaning roller 6 to slide toward one side of the first rotating disk 702 (because the third rotating disk 802 and the second spline shaft 801 are in sliding cooperation, that is, spline connection, so that the third rotating disk 802 can rotate with the second spline shaft 801 while the third rotating disk 802 can slide on the outer surface of the second spline shaft 801). At this time, the second rotating disk 7 04 will squeeze the elastic member 705, causing the elastic member 705 to deform, so that the first ball 804 and the second ball 806 are separated, and the elastic member 705 forces the second turntable 704 to drive the cleaning roller 6 to slide toward one side of the fixed ring 805 (because the second turntable 704 and the first spline shaft 703 are in a sliding fit, that is, a spline connection, the second turntable 704 can rotate with the first spline shaft 703 while the second turntable 704 can slide on the outer surface of the first spline shaft 703), thereby causing the cleaning roller 6 to slide axially back and forth while rotating circumferentially.

[0038] The adjusting assembly 9 includes a screw rod 901 threadedly connected to the mounting bracket 5, and a knob 902 is fixedly installed at one end of the screw rod 901 located outside the mounting bracket 5, and a first rotating hole is opened at the end of the fixing ring 805. The screw rod 901 is connected to the first rotating hole through a bearing. By using the above-mentioned bearing, the screw rod 901 can drive the fixing ring 805 to slide, and the screw rod 901 can rotate circumferentially on its own. The end of the screw rod 901 away from the knob 902 is rotatably connected to the fixing ring 805, and the fixing ring 805 is fixedly installed with a scale 903 above the screw rod 901. A sliding hole is opened at the position of the mounting bracket 5 corresponding to the scale 903, and a threaded hole corresponding to the position of the mounting bracket 5 corresponding to the screw rod 901 is opened. The scale 903 is used to cooperate with the sliding hole to ensure the stability of the fixing ring 805 when sliding, and to facilitate the precise control of the sliding adjustment of the fixing ring 805.

[0039] To summarize, by rotating the screw rod 901 through the knob 902, the sliding of the fixed ring 805 can be controlled, thereby adjusting the size of the contact surface between the first ball 804 and the second ball 806, thereby changing the amplitude of the reciprocating axial sliding of the cleaning roller 6 in disguise. For light pollution, a small reciprocating amplitude can be used to remove it through rotational friction, and avoid brush wear caused by excessive cleaning; for heavy pollution, a large sliding amplitude allows the brush to have a wider axial coverage range in the same area, and the stripping effect is enhanced through more radial and axial cross friction, thereby improving the cleaning strength.

[0040] The mounting frame 5 is located above the two cleaning rollers 6 and is provided with an impurity adhesion roller 501. An electrostatic removal mechanism 201 is provided at the entrance of the transmission channel 2. A dust suction system is provided inside the transmission channel 2 above the two cleaning rollers 6. The mounting frame 5 is slidable, so that after it is pulled out, the cleaning rollers 6 and the impurity adhesion roller 501 can be replaced or cleaned.

[0041] The working process is as follows:

[0042] S1: When in use, the motor 701 controls the first rotating disk 702 to rotate, and then the first rotating disk 702 drives the second rotating disk 704 to rotate through the first spline shaft 703. The second rotating disk 704 cooperates with the first plug-in component 706 and the plug-in hole 601 to make the cleaning roller 6 rotate circumferentially. Then, the PCB circuit board is allowed to enter the transmission channel 2 through the transmission mechanism 3, so that the static electricity removal mechanism 201 removes static electricity first, and then the cleaning roller 6 cleans it;

[0043] S2: When the cleaning roller 6 rotates circumferentially, the third rotary disk 802 drives the second spline shaft 801 to rotate synchronously with the second spline shaft 801 by the cooperation between the plug hole 601 and the second plug connector 803;

[0044] S3: When the third rotating disk 802 rotates circumferentially, the first balls 804 and the second balls 806 are arranged, and when the first balls 804 and the second balls 806 come into contact with each other, the third rotating disk 802 is squeezed by the pressure and forces the cleaning roller 6 to slide toward one side of the first rotating disk 702. At this time, the second rotating disk 704 squeezes the elastic member 705, causing the elastic member 705 to deform and separate the first balls 804 and the second balls 806. Then, the elastic member 705 forces the second rotating disk 704 to drive the cleaning roller 6 to slide toward one side of the fixing ring 805, so that the cleaning roller 6 can slide back and forth axially while rotating circumferentially.

[0045] S4: The cleaning roller 6 is rotated in the circumferential direction and slides back and forth in the axial direction.

[0046] First, the cleaning roller 6 can be rotated and moved back and forth along the axial direction at the same time, so that the contact track of the bristles presents a complex spiral and reciprocating path, which can evenly cover the entire board surface, including the edges, corners, and tiny gaps between circuits of the PCB board, which are easily overlooked areas, completely eliminating blind spots in cleaning;

[0047] Secondly, the circumferential rotation provides radial friction, while the axial reciprocating sliding provides axial shear force. The two form a cross friction force. The bristles will repeatedly act on the impurities from different directions, destroying the adhesion between the impurities and the board surface. Compared with a single rotational motion, it is easier to remove stubborn impurities from the board surface.

[0048] Thirdly, the axial reciprocating sliding can disrupt the accumulation trend of impurities through axial movement: the bristles will redisperse the accumulated impurities when moving axially, and then suck them away through the rotating friction and the coordinated dust collection system, reducing the secondary residue of impurities on the board surface;

[0049] S5: By rotating the screw rod 901 through the knob 902, the sliding of the fixed ring 805 can be controlled, so that the size of the contact surface between the first ball 804 and the second ball 806 can be adjusted, thereby changing the amplitude of the reciprocating axial sliding of the cleaning roller 6 in disguise. For light pollution, a small reciprocating amplitude can be removed through rotational friction, and the wear of the bristles caused by excessive cleaning can be avoided; for heavy pollution, a large sliding amplitude is used, so that the axial coverage range of the brush in the same area is wider, and the stripping effect is enhanced through more radial and axial cross friction, thereby improving the cleaning strength.

[0050] The transmission mechanism 3, cleaning roller 6, motor 701, impurity adhesion roller 501, static electricity removal mechanism 201 and dust collection system described in this application are well-known technologies in the technical field, so their specific structures and working principles are not described in detail.

[0051] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and modifications fall within the scope of the invention as claimed.

Claims

1. A PCB board surface cleaning device for PCB production, characterized by: The invention comprises a machine body (1), wherein a transmission channel (2) is provided inside the machine body (1), a transmission mechanism (3) for transmitting PCB circuit boards of various models is installed inside the transmission channel (2), a receiving chamber (4) is provided on the machine body (1) above the transmission channel (2), a mounting frame (5) is provided inside the receiving chamber (4) for sliding, and two cleaning rollers (6) for cleaning the PCB circuit boards transported on the transmission mechanism (3) are rotatably provided inside the mounting frame (5); A driving mechanism (7) for controlling the circumferential rotation of the cleaning roller (6) is provided on one side of the mounting frame (5) located inside the machine body (1), and a guiding mechanism (8) for cooperating with the driving mechanism (7) to allow the cleaning roller (6) to perform axial reciprocating sliding while rotating circumferentially is provided on one side of the mounting frame (5) located outside the machine body (1).

2. A PCB board surface cleaning device for production according to claim 1, characterized in that: The driving mechanism (7) comprises a motor (701) fixedly mounted on the mounting frame (5); an output end of the motor (701) passes through the mounting frame (5) and a first rotary disk (702) is fixedly mounted inside the mounting frame (5); a first spline shaft (703) is fixedly mounted on one end of the first rotary disk (702) away from the motor (701); a second rotary disk (704) is slidably mounted on the outer surface of the first spline shaft (703); an elastic member (705) is fixedly mounted between the second rotary disk (704) and the first rotary disk (702); and a first connector (706) is fixedly mounted on one end of the second rotary disk (704) away from the first rotary disk (702).

3. The PCB board surface cleaning device according to claim 2, characterized in that: The guiding mechanism (8) comprises a second spline shaft (801) rotatably connected to the mounting frame (5); a third turntable (802) is slidably provided on the outer surface of the second spline shaft (801); a second connector (803) is fixedly provided on the side of the third turntable (802) facing the second turntable (704); a plurality of first balls (804) are provided on the side of the third turntable (802) away from the second connector (803); a fixing ring (805) is movably connected to the side of the mounting frame (5) close to the third turntable (802); second balls (806) are provided on the fixing ring (805) at positions corresponding to the plurality of first balls (804); and an adjusting component (9) is provided on the mounting frame (5) for controlling the axial sliding of the fixing ring (805) along the second spline shaft (801).

4. A PCB board surface cleaning device for production according to claim 3, characterized in that: The adjustment assembly (9) comprises a screw rod (901) threadedly connected to the mounting frame (5); a knob (902) is fixedly mounted on one end of the screw rod (901) located outside the mounting frame (5); and an end of the screw rod (901) away from the knob (902) is rotatably connected to the fixing ring (805).

5. The PCB board surface cleaning device according to claim 4, characterized in that: The fixing ring (805) is located above the screw rod (901) and is fixedly mounted with a scale (903); the mounting frame (5) is provided with a sliding hole at a position corresponding to the scale (903); and the mounting frame (5) is provided with a threaded hole corresponding to the screw rod (901).

6. The PCB board surface cleaning device according to claim 5, characterized in that: The fixing ring (805) is provided with a first rotating hole at the end of the screw rod (901), and the screw rod (901) is connected to the first rotating hole through a bearing.

7. The PCB board surface cleaning device according to claim 3, characterized in that: The cross-sections of the first connector (706) and the second connector (803) are both hexagonal, the cleaning roller (6) is a brush roller, and a connecting hole (601) adapted to the first connector (706) and the second connector (803) is provided at the center of the cleaning roller (6).

8. The PCB board surface cleaning device according to claim 3, characterized in that: The number of the first balls (804) and the number of the second balls (806) are the same, and the mounting frame (5) is provided with a second rotation hole at one end of the second spline shaft (801), and the second spline shaft (801) is connected to the second rotation hole through a bearing.

9. The PCB board surface cleaning device according to claim 2, characterized in that: The elastic member (705) is a spring, and the elastic member (705) is sleeved on the outer surface of the first spline shaft (703).

10. The PCB board surface cleaning device for production according to claim 1, characterized in that: The mounting frame (5) is provided with an impurity adhesion roller (501) above the two cleaning rollers (6), an electrostatic removal mechanism (201) is provided at the entrance of the transmission channel (2), and a dust collection system is provided inside the transmission channel (2) above the two cleaning rollers (6).

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