A surface detection device for laminated paper production

Abstract

The present invention provides a surface detection device for laminated paper production, including a detection component, the detection component including a first reciprocating screw and a limit rod, the outer wall of the first reciprocating screw is connected to a mounting seat, and the bottom of the mounting seat is connected to a conductive voltage block fixedly connected. During the detection, the present invention presses the upper and lower conductive voltage blocks against the two side surfaces of the laminated paper to be detected, and then the conductive voltage blocks and the laminated paper are respectively conveyed at the same speed. During the conveying process, when there is an area on the surface of the laminated paper of the detection section that is not laminated in place, the upper and lower conductive voltage blocks are mutually conductive and drive a marking mechanism to mark the section of laminated paper. During this detection process, there is a long contact time between the conductive voltage block and the laminated paper, so that there is sufficient current conduction time, thereby making the detection more accurate, and during the detection process, no relative sliding occurs between the laminated paper and the conductive voltage block, so that the surface of the laminated paper will not be damaged.

Description

Technical Field

[0001] The present invention relates to the technical field of laminated paper detection, in particular to a surface detection device used in laminated paper production. Background Art

[0002] Laminated paper is a composite material in which plastic particles are coated on the surface of paper through a casting machine. It has oil-proof, waterproof and heat-sealed properties. During the processing of laminated paper, it needs to be tested for leaks, that is, to detect whether the surface is sprayed with a laminate layer. The existing laminated paper leak detection is mainly performed by passing the laminated paper through two upper and lower conductive rollers. That is, when there is a leaking position on the surface of the laminated paper, the upper and lower conductive rollers are connected to each other and an alarm is issued to perform leak detection. However, since this detection method performs dynamic detection on the laminated paper, the contact time between the laminated paper and the conductive roller is short. This results in the detection part of the laminated paper having passed the conductive roller when the two conductive rollers are not yet connected, which can easily cause inaccurate detection. For this reason, the present invention develops a surface detection device for laminated paper production to solve the above technical problems. Summary of the Invention

[0003] The object of the present invention is to provide a surface detection device for laminated paper production to solve the technical problems raised by the above background technology.

[0004] To achieve the above objectives, the technical solution provided by the present invention is:

[0005] A surface inspection device for laminated paper production, comprising a detection box, wherein an unwinding roller and a winding roller are respectively provided at opposite ends of the detection box, and a detection component for inspecting the laminated paper is installed in the inner cavity of the detection box;

[0006] The detection assembly includes an upper detection part and a lower detection part, and the upper detection part and the lower detection part both include a first reciprocating screw rod and a limit rod installed in the inner cavity of the detection box, the outer wall of the first reciprocating screw rod is threadedly connected to a mounting seat, and the mounting seat is slidably connected to the limit rod, the top of the mounting seat is rotatably connected to two parallel reciprocating threaded sleeves, the bottom of the reciprocating threaded sleeve passes through the bottom of the mounting seat and is threadedly connected to the second reciprocating screw rod, a conductive voltage block is fixed between the bottoms of the two second reciprocating screw rods, the outer wall of the reciprocating threaded sleeve is installed with a rotating gear through a one-way bearing, and the top and bottom of the inner cavity of the detection box are respectively fixed with fixing bars, and the fixing bars are located at two Between the rotating gears, the opposite ends of the fixed bar are respectively provided with a first rack and a second rack meshed with the rotating gear. When the rotating gear is positively meshed with the first rack, the two conductive voltage blocks are driven to slide close to each other and press the laminated paper. When the rotating gear is positively meshed with the second rack, the two conductive voltage blocks are driven to slide away from each other and loosen the laminated paper. The side wall of the detection box is equipped with a variable speed drive mechanism that drives the conductive voltage blocks to slide back and forth, and the speed of the reverse sliding of the conductive voltage blocks is greater than the speed of the forward sliding. When the conductive voltage blocks press the laminated paper, the sliding speed of the conductive voltage blocks is consistent with the winding speed of the laminated paper. The detection component also includes a marking mechanism.

[0007] Preferably, the side wall of the detection box is equipped with a conductive slide rail electrically connected to the external power supply, and the side wall of the conductive voltage block is equipped with a conductive column that cooperates with the conductive slide rail, and after the conductive column is separated from the conductive slide rail, the conductive voltage block is then positively meshed with the second rack.

[0008] Preferably, the marking mechanism includes mounting bars fixedly connected to the opposite side walls of the conductive voltage block, the two mounting bars located above are both slidably connected with sliding columns, the bottom of the sliding columns passes through the mounting bars and is installed with a first electromagnetic bar, a number of marking pens are installed at the bottom of the first electromagnetic bar, the outer wall of the sliding column located above the mounting bar is fixed with a spring, and a side of the mounting bar located below close to the marking pen is installed with a second electromagnetic bar that attracts the first electromagnetic bar, and when the upper and lower conductive voltage blocks are conductive, the first electromagnetic bar and the second electromagnetic bar attract each other.

[0009] Preferably, the marking head of the marking pen is arranged close to the side wall of the conductive voltage block.

[0010] Preferably, the speed change drive mechanism includes a drive motor, a steel belt continuously variable transmission and a variable diameter drive component, the driven pulley of the steel belt continuously variable transmission is sleeved on the outer wall of the first reciprocating screw, the driving pulley of the steel belt continuously variable transmission is sleeved on the outer wall of the output shaft of the drive motor, the driven pulley and the driving pulley are connected by a steel belt, and the variable diameter drive component is respectively connected to the sliding parts of the driven pulley and the driving pulley.

[0011] Preferably, the variable diameter drive member includes a screw rotatably connected to the side wall of the detection box, the outer wall of the screw is threadedly connected to a slider, and the end of the slider is equipped with a push rod rotatably connected to the driven pulley and the driving pulley respectively, and the push rod drives the sliding parts of the driven pulley and the driving pulley to slide respectively.

[0012] Preferably, the driven pulley includes a driven fixed portion fixedly connected to the outer wall of the first reciprocating screw and a driven sliding portion slidably connected to the outer wall of the first reciprocating screw, and both the driven fixed portion and the driven sliding portion are conical. The active pulley includes an active fixed portion fixedly connected to the output end of the drive motor and an active sliding portion slidably connected to the output end of the drive motor, and both the active fixed portion and the active sliding portion are conical.

[0013] Preferably, the outer walls of the first reciprocating screw and the output shaft of the driving motor are both provided with limit keys, and the inner walls of the driven sliding part and the active sliding part are both provided with limit grooves that cooperate with the limit keys.

[0014] Preferably, the interior of the limit rod is a hollow structure and is coaxially arranged with the screw rod. The inner cavity of the limit rod is slidably connected to a sliding rod. One end of the sliding rod is inserted into the inner cavity of the screw rod. A limiting column is provided on the outer wall of the end of the sliding rod inserted into the inner cavity of the screw rod. The inner cavity of the screw rod is provided with a spiral groove that cooperates with the limiting column. The outer wall of the sliding rod is fixed with limiting rings at opposite ends, and the two limiting rings pass through the outer wall of the limit rod and are respectively located on opposite sides of the mounting seat.

[0015] Preferably, the limiting ring and the limiting rod are connected via two limiting strips, and the outer wall of the limiting rod is provided with a sliding groove that cooperates with the limiting strips.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] When the present invention performs leak prevention detection on laminated paper, the upper and lower conductive voltage blocks are respectively pressed against the two side surfaces of the laminated paper to be detected, and then the conductive voltage blocks and the laminated paper are respectively conveyed at the same speed. During the conveying process, when there is an area on the surface of the laminated paper in the detection section where the coating is not in place, the upper and lower conductive voltage blocks are mutually conductive and drive a marking mechanism to mark the section of laminated paper. During this detection process, there is a long contact time between the conductive voltage blocks and the laminated paper, so that there is sufficient current conduction time, thereby making the detection more accurate. In addition, during the detection process, no relative sliding occurs between the laminated paper and the conductive voltage blocks, so that the surface of the laminated paper is not damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. 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 creative work.

[0019] Figure 1 It is a structural schematic diagram of the detection device of the present invention;

[0020] Figure 2 It is a front view structural schematic diagram of the detection device of the present invention;

[0021] Figure 3 for Figure 2 A schematic diagram of the structure at point A in the middle;

[0022] Figure 4 It is a schematic side sectional view of the detection device of the present invention;

[0023] Figure 5 for Figure 4 A magnified schematic diagram of the structure at B in the middle;

[0024] Figure 6 Schematic diagram of the mounting base and its connecting components in the detection device of the present invention;

[0025] Figure 7 for Figure 6 Schematic diagram of the side section structure;

[0026] Figure 8 It is a structural schematic diagram of the speed-changing drive mechanism in the detection device of the present invention.

[0027] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0028] 1. Detection box; 2. Unwinding roller; 3. Rewinding roller; 4. Detection assembly; 41. First reciprocating screw; 42. Limiting rod; 421. Sliding rod; 422. Limiting column; 423. Limiting ring; 424. Limiting bar; 43. Mounting seat; 44. Reciprocating threaded sleeve; 45. Second reciprocating screw; 46. Conductive voltage block; 47. Rotating gear; 48. Fixing bar; 49. First rack; 410. Second rack ; 411. Speed-changing drive mechanism; 4111. Drive motor; 4112. Steel-belt continuously variable transmission; 4113. Screw; 4114. Slider; 4115. Push rod; 412. Conductive column; 413. Marking mechanism; 4131. Mounting strip; 4132. Sliding column; 4133. First electromagnetic strip; 4134. Marking pen; 4135. Spring; 4136. Second electromagnetic strip; 5. Conductive slide rail. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0030] like Figure 1-8 As shown: Embodiment 1 of the present invention is:

[0031] A surface inspection device for laminated paper production includes a detection box 1, with an unwinding roller 2 and a winding roller 3 provided at opposite ends of the detection box 1, and a detection component 4 for inspecting laminated paper installed in the inner cavity of the detection box 1;

[0032] The detection assembly 4 includes an upper detection part and a lower detection part, and the upper detection part and the lower detection part both include a first reciprocating screw rod 41 and a limit rod 42 installed in the inner cavity of the detection box 1. The outer wall of the first reciprocating screw rod 41 is threadedly connected to a mounting seat 43, and the mounting seat 43 is slidably connected to the limit rod 42. The top of the mounting seat 43 is rotatably connected to two parallel reciprocating threaded sleeves 44. The bottom of the reciprocating threaded sleeve 44 passes through the bottom of the mounting seat 43 and is threadedly connected to a second reciprocating screw rod 45. A conductive voltage block 46 is fixed between the bottoms of the two second reciprocating screw rods 45. A rotating gear 47 is installed on the outer wall of the reciprocating threaded sleeve 44 through a one-way bearing. The top and bottom of the inner cavity of the detection box 1 are respectively fixed with fixing bars 48, and the fixing bars 48 are located between the two rotating gears. Between the wheels 47, the opposite ends of the fixed bar 48 are respectively provided with a first rack 49 and a second rack 410 meshing with the rotating gear 47. When the rotating gear 47 is positively meshed with the first rack 49, the two conductive voltage blocks 46 are driven to slide close to each other and press the laminated paper. When the rotating gear 47 is positively meshed with the second rack 410, the two conductive voltage blocks 46 are driven to slide away from each other and loosen the laminated paper. The side wall of the detection box 1 is installed with a variable speed drive mechanism 411 that drives the conductive voltage block 46 to slide back and forth, and the speed of the reverse sliding of the conductive voltage block 46 is greater than the speed of the forward sliding. When the conductive voltage block 46 presses the laminated paper, the sliding speed of the conductive voltage block 46 is consistent with the winding speed of the laminated paper. The detection component 4 also includes a marking mechanism 413.

[0033] In this embodiment, in order to simplify the circuit connection in the detection box and prevent the circuit from sliding back and forth with the conductive voltage block, a conductive slide rail 5 electrically connected to the external power supply is installed on the side wall of the detection box body 1, and a conductive column 412 cooperating with the conductive slide rail 5 is installed on the side wall of the conductive voltage block 46. After the conductive column 412 is separated from the conductive slide rail 5, the conductive voltage block 46 is positively meshed with the second rack 410. When the conductive column contacts the conductive slide rail, the conductive voltage block is electrically connected to the external power supply, and then the coated paper is inspected. When the conductive column is separated from the conductive slide rail, the two conductive voltage blocks are powered off, and at this time the conductive voltage blocks can be raised and lowered normally.

[0034] In this embodiment, in order to be able to mark the detected coated paper in time, the marking mechanism 413 includes mounting bars 4131 fixedly connected to the opposite side walls of the conductive voltage block 46, the two mounting bars 4131 located above are both slidably connected with sliding columns 4132, the bottom of the sliding column 4132 passes through the mounting bar 4131 and is installed with a first electromagnetic bar 4133, and a number of marking pens 4134 are installed at the bottom of the first electromagnetic bar 4133, the outer wall of the sliding column 4132 located above the mounting bar 4131 is fixedly connected with a spring 4135, and a portion of the mounting bar 4131 located below is close to the marking pen 4134. A second electromagnetic strip 4136 is installed on the side, which attracts the first electromagnetic strip 4133. When the upper and lower conductive voltage blocks 46 are connected, the first electromagnetic strip 4133 and the second electromagnetic strip 4136 attract each other. The marking head of the marking pen 4134 is set close to the side wall of the conductive voltage block 46. When the upper and lower conductive voltage blocks are connected to each other, the first electromagnetic strip and the second electromagnetic strip are energized and attract each other, so that the marking pen slides downward and marks the surface of the laminated paper. When the conductive voltage block is powered off, the first magnetic strip and the marking pen return to their original positions under the action of the spring restoring force, detach from the laminated paper, and complete the marking.

[0035] In this embodiment, the speed change drive mechanism 411 includes a drive motor 4111, a steel belt type continuously variable transmission 4112 and a variable diameter drive member. The driven pulley of the steel belt type continuously variable transmission 4112 is sleeved on the outer wall of the first reciprocating screw rod 41, and the active pulley of the steel belt type continuously variable transmission 4112 is sleeved on the outer wall of the output shaft of the drive motor 4111. The driven pulley and the active pulley are connected by a steel belt. The variable diameter drive member is respectively connected to the sliding parts of the driven pulley and the active pulley. The driven pulley includes a driven fixed part fixed to the outer wall of the first reciprocating screw rod 41 and a sliding part of the outer wall of the first reciprocating screw rod 41. The driven sliding part is dynamically connected, and the driven fixed part and the driven sliding part are both conical. The driving pulley includes an active fixed part fixedly connected to the output end of the driving motor 4111 and an active sliding part slidingly connected to the output end of the driving motor 4111, and the active fixed part and the active sliding part are both conical. When the speed is changed, the diameter-changing drive member synchronously pushes the driven sliding part and the active sliding part to slide, and when the active sliding part approaches the active fixed part, the driven sliding part slides in the direction away from the driven fixed part, thereby realizing the simultaneous diameter change of the driving pulley and the driven pulley, and realizing the speed adjustment.

[0036] In this embodiment, in order to realize automatic diameter-changing adjustment of the active pulley and the driven pulley, the diameter-changing driving member includes a screw 4113 rotatably connected to the side wall of the detection box 1, and the outer wall of the screw 4113 is threadedly connected to a slider 4114. The end of the slider 4114 is equipped with a push rod 4115 rotatably connected to the driven pulley and the active pulley, and the push rod 4115 drives the sliding parts of the driven pulley and the active pulley to slide respectively. The interior of the limit rod 42 is a hollow structure and is coaxially arranged with the screw 4113. The inner cavity of the limit rod 42 is slidably connected with a sliding rod 421. One end of the sliding rod 421 is inserted into the inner cavity of the screw 4113. A limiting column 422 is provided on the outer wall of one end of the sliding rod 421 inserted into the inner cavity of the screw 4113. The inner cavity of the screw 4113 is provided with a threaded rod that cooperates with the limiting column 422. The two ends of the outer wall of the sliding rod 421 are fixedly connected to the limit rings 423, and the two limit rings 423 pass through the outer wall of the limit rod 42 and are respectively located on the opposite sides of the mounting seat 43. When the mounting seat slides back and forth under the drive of the first reciprocating screw, it can push the limit block and the sliding rod to slide, and then the limit column on the outer wall of the sliding rod and the spiral groove inside the screw can drive the screw to rotate under the mutual cooperation of the limit column on the outer wall of the sliding rod and the spiral groove inside the screw, thereby driving the slider and the push rod to slide, realizing the variable diameter adjustment of the active pulley and the driven pulley, and during the entire adjustment process, the back and forth sliding of the sliding rod is transitioned through the screw, and the interlocking effect between the screw and the slider can be used to ensure the fixation of the push rod position, so that the diameters of the driven pulley and the active pulley can be fixed and will not change during the rotation of the driving motor, thereby ensuring the stability of the driving mechanism.

[0037] In this embodiment, the outer walls of the first reciprocating screw 41 and the output shaft of the driving motor 4111 are both provided with limit keys, and the inner walls of the driven sliding part and the active sliding part are both provided with limit grooves that cooperate with the limit keys.

[0038] In this embodiment, the limiting ring 423 and the limiting rod 42 are connected via two limiting strips 424 , and the outer wall of the limiting rod 42 is provided with a sliding groove that cooperates with the limiting strips 424 .

[0039] The specific working process of the above detection device is as follows:

[0040] During the laminated paper inspection, the laminated paper roll to be inspected is mounted on the unwinding roller 2, and one end is then pulled onto the winding roller 3. The winding motor and the drive motor 4111 of the winding roller 3 are then started respectively (and the laminated paper portion that has passed through in advance is manually inspected).

[0041] The winding motor drives the winding roller 3 to rotate and rewind the coated paper, and the driving motor 4111 drives the first reciprocating screw 41 to rotate and drive the mounting seat 43 to slide in the forward direction (consistent with the conveying direction of the coated paper), and the forward sliding speed of the mounting seat 43 is consistent with the rewinding speed of the coated paper; during the forward sliding process of the mounting seat 43, the rotating gear 47 engages with the first rack 49, thereby driving the reciprocating threaded sleeve 44 to rotate, driving the upper and lower conductive voltage blocks 46 to slide in the direction of approaching each other and The laminated paper is pressed tightly, and then the laminated paper is slid in the forward direction at the same speed as the laminated paper. After pressing, the conductive pillars 412 on the side walls of the conductive voltage block 46 contact the conductive slide rail 5, so that the conductive voltage block 46 is energized. At this time, when there is an area of the laminated paper between the two conductive voltage blocks 46 that has not been sprayed in place, the upper and lower conductive voltage blocks 46 can be mutually conductive, forming a closed loop. When there is no area of the laminated paper between the two conductive voltage blocks 46 that has not been sprayed in place, the two conductive voltage blocks 46 are not conductive.

[0042] When the upper and lower conductive voltage blocks 46 are connected to each other, the first electromagnetic strip 4133 and the second electromagnetic strip 4136 on the side wall of the conductive voltage block 46 are energized and attract each other, so that the marking pen 4134 on the first electromagnetic strip 4133 descends and marks the laminated paper in that section. Then, when the conductive column 412 separates from the conductive slide rail 5, the first electromagnetic strip 4133 and the second electromagnetic strip 4136 are de-energized, and the first electromagnetic strip 4133 and the marking pen 4134 return to their original positions under the action of the restoring force of the spring 4135, completing the detection and marking.

[0043] After the detection is completed, the mounting seat 43 continues to slide forward for a distance. At this time, the rotating gear 47 is engaged with the second rack 410, thereby driving the upper and lower conductive voltage blocks 46 to slide away from each other and separate from the coated paper. At the same time, the mounting seat 43 contacts the limiting ring 423 on this side and pushes the limiting ring 423 and the sliding rod 421 to slide. Then, the screw 4113 is driven to rotate forward through the mutual cooperation between the limiting column 422 and the spiral groove, thereby driving the slider 4114 and the push rod 4115 to slide forward, respectively pulling the active sliding part and the driven sliding part to slide in opposite directions. , adjust the diameters of the driven pulley and the driving pulley to increase the rotation speed of the first reciprocating screw 41. After the adjustment is in place, the mounting seat 43 slides to the end of the first reciprocating screw 41, so that it can slide in the reverse direction under the continued drive of the first reciprocating screw 41, and the reverse sliding speed is greater than the forward sliding speed and the transmission speed of the coated paper. During the reverse sliding process, since the rotating gear 47 and the reciprocating threaded sleeve 44 are connected by a one-way bearing, the reverse engagement of the rotating gear 47 with the second rack 410 and the first rack 49 will cause the rotating gear 47 to rotate idly;

[0044] In the process of the mounting seat 43 quickly sliding in the reverse direction to the other end of the first reciprocating screw 41, the limiting ring 423 at this end is pushed to slide, so that the sliding rod 421 slides in the reverse direction, thereby causing the screw 4113 to rotate in the reverse direction through the mutual cooperation of the limiting column 422 and the spiral groove, driving the driven pulley and the active pulley to readjust the diameter, and adjusting the rotation speed of the first reciprocating screw 41 to be consistent with the transmission speed of the coated paper.

[0045] Then the mounting seat 43 continues to slide forward, driving the conductive voltage block 46 to slide, and causing the rotating gear 47 to mesh with the first rack 49 again, driving the conductive voltage block 46 to press the laminated paper to be tested again and perform the test.

[0046] In this embodiment, the reverse sliding speed of the mounting seat 43 can be twice or more than twice the forward sliding speed, and during detection, the conductive voltage block 46 can repeatedly detect part of the area of the laminated paper, thereby achieving uninterrupted detection of the laminated paper.

[0047] In the present invention, unless otherwise clearly stipulated and limited, the terms "install", "set", "connect", "fix", "screw" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0048] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes may be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A surface detection device for laminated paper production, characterized by: It comprises a detection box (1), wherein an unwinding roller (2) and a rewinding roller (3) are respectively provided at opposite ends of the detection box (1), and a detection component (4) for detecting coated paper is installed in the inner cavity of the detection box (1); The detection assembly (4) includes an upper detection member and a lower detection member, each of which includes a first reciprocating screw (41) and a limit rod (42) installed in the inner cavity of the detection box (1), the outer wall of the first reciprocating screw (41) is threadedly connected to a mounting seat (43), and the mounting seat (43) is slidably connected to the limit rod (42), the top of the mounting seat (43) is rotatably connected to two parallel reciprocating threaded sleeves (44), the bottom of the reciprocating threaded sleeve (44) passes through the bottom of the mounting seat (43) and is threadedly connected to a second reciprocating screw (45), a conductive voltage block (46) is fixed between the bottoms of the two second reciprocating screws (45), the outer wall of the reciprocating threaded sleeve (44) is installed with a rotating gear (47) through a one-way bearing, the top and bottom of the inner cavity of the detection box (1) are respectively fixed with fixing bars (48), and the fixing bars (48) are located at two Between the rotating gears (47), the opposite ends of the fixed bar (48) are respectively provided with a first rack (49) and a second rack (410) meshed with the rotating gear (47). When the rotating gear (47) is meshed with the first rack (49) in a positive direction, the two conductive voltage blocks (46) are driven to slide close to each other and press the coated paper. When the rotating gear (47) is meshed with the second rack (410) in a positive direction, the two conductive voltage blocks (46) are driven to slide away from each other and release the coated paper. The side wall of the detection box (1) is installed with a variable speed drive mechanism (411) for driving the conductive voltage blocks (46) to slide back and forth, and the speed of the reverse sliding of the conductive voltage blocks (46) is greater than the speed of the forward sliding. When the conductive voltage blocks (46) press the coated paper, the sliding speed of the conductive voltage blocks (46) is consistent with the winding speed of the coated paper. The detection component (4) also includes a marking mechanism (413).

2. The surface detection device for laminated paper production according to claim 1, characterized in that: The side wall of the detection box (1) is installed with a conductive slide rail (5) electrically connected to an external power supply, and the side wall of the conductive voltage block (46) is installed with a conductive column (412) that cooperates with the conductive slide rail (5), and after the conductive column (412) is separated from the conductive slide rail (5), the conductive voltage block (46) is positively meshed with the second rack (410).

3. The surface detection device for laminated paper production according to claim 1, characterized in that: The marking mechanism (413) includes a mounting bar (4131) fixedly connected to opposite side walls of the conductive voltage block (46); the two mounting bars (4131) located above are both slidably connected to a sliding column (4132); the bottom of the sliding column (4132) passes through the mounting bar (4131) and is installed with a first electromagnetic bar (4133); a plurality of marking pens (4134) are installed at the bottom of the first electromagnetic bar (4133); the outer wall of the sliding column (4132) located above the mounting bar (4131) is fixedly connected with a spring (4135); a side of the mounting bar (4131) located below, close to the marking pens (4134), is installed with a second electromagnetic bar (4136) that attracts the first electromagnetic bar (4133); and when the upper and lower conductive voltage blocks (46) are conductive, the first electromagnetic bar (4133) and the second electromagnetic bar (4136) attract each other.

4. The surface detection device for laminated paper production according to claim 3, characterized in that: The marking head of the marking pen (4134) is arranged close to the side wall of the conductive voltage block (46).

5. The surface detection device for laminated paper production according to claim 1, characterized in that: The speed-changing drive mechanism (411) comprises a driving motor (4111), a steel-belt continuously variable transmission (4112) and a variable-diameter driving member, wherein the driven pulley of the steel-belt continuously variable transmission (4112) is sleeved on the outer wall of the first reciprocating screw (41), and the driving pulley of the steel-belt continuously variable transmission (4112) is sleeved on the outer wall of the output shaft of the driving motor (4111), the driven pulley and the driving pulley are connected by a steel belt, and the variable-diameter driving member is respectively connected to the sliding parts of the driven pulley and the driving pulley.

6. The surface detection device for laminated paper production according to claim 5, characterized in that: The variable diameter drive member comprises a screw (4113) rotatably connected to the side wall of the detection box (1); the outer wall of the screw (4113) is threadedly connected to a slider (4114); the end of the slider (4114) is provided with a push rod (4115) rotatably connected to the driven pulley and the driving pulley, respectively; and the push rod (4115) drives the sliding parts of the driven pulley and the driving pulley to slide, respectively.

7. The surface detection device for laminated paper production according to claim 5, characterized in that: The driven pulley includes a driven fixed portion fixedly connected to the outer wall of the first reciprocating screw (41) and a driven sliding portion slidably connected to the outer wall of the first reciprocating screw (41), and both the driven fixed portion and the driven sliding portion are conical. The active pulley includes an active fixed portion fixedly connected to the output end of the drive motor (4111) and an active sliding portion slidably connected to the output end of the drive motor (4111), and both the active fixed portion and the active sliding portion are conical.

8. The surface detection device for laminated paper production according to claim 7, characterized in that: The outer walls of the first reciprocating screw (41) and the output shaft of the drive motor (4111) are both provided with limit keys, and the inner walls of the driven sliding part and the active sliding part are both provided with limit grooves that cooperate with the limit keys.

9. The surface detection device for laminated paper production according to claim 6, characterized in that: The interior of the limiting rod (42) is a hollow structure and is coaxially arranged with the screw rod (4113). The inner cavity of the limiting rod (42) is slidably connected to the sliding rod (421). One end of the sliding rod (421) is inserted into the inner cavity of the screw rod (4113). A limiting column (422) is provided on the outer wall of the end of the sliding rod (421) inserted into the inner cavity of the screw rod (4113). The inner cavity of the screw rod (4113) is provided with a spiral groove that cooperates with the limiting column (422). The outer wall of the sliding rod (421) is fixed with limiting rings (423) at opposite ends, and the two limiting rings (423) pass through the outer wall of the limiting rod (42) and are respectively located on opposite sides of the mounting seat (43).

10. The surface detection device for laminated paper production according to claim 9, characterized in that: The limiting ring (423) and the limiting rod (42) are connected via two limiting strips (424), and a sliding groove that cooperates with the limiting strips (424) is provided on the outer wall of the limiting rod (42).

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