Printed circuit board surface film pasting device

Abstract

The invention discloses a printed circuit board surface film pasting device, and relates to the technical field of circuit board processing, the printed circuit board surface film pasting device comprises two conveying machine tools used for substrate conveying, and a film pasting assembly is arranged between the two conveying machine tools; the film pasting assembly comprises an upper pressing roller and a lower pressing roller which are symmetrically arranged up and down and can rotate, when the base plate moves to the position between the upper pressing roller and the lower pressing roller, the upper pressing roller presses and covers the surface of the base plate with a film body, the surface of the lower pressing roller is sleeved with an outer lantern ring, and the outer wall of the lower pressing roller is provided with an installation groove for containing a cutting piece. The inclined surface of the vertical blade abuts against and is attached to the inclined surface at one end of the notch, and the vertical blade is extruded by the inclined surface of the notch, so that the vertical blade can contract inwards along the mounting groove, a film body can be cut at the roller body immediately after a substrate is coated with a film, the processing efficiency is improved, the film hanging rate on the substrate is reduced, the waste of redundant film bodies is avoided, and the production cost is reduced. The processing cost is saved.

Description

Technical Field

[0001] The invention relates to the technical field of circuit board processing, and in particular to a surface film pasting device for a printed circuit board. Background Art

[0002] Circuit board film is an important protective measure, which can quickly and effectively protect circuit boards from damage and corrosion. Circuit board film generally consists of a transparent protective film and a decorative film with a printed design. Transparent copper clad film is a transparent protective film that can completely cover the copper foil on the surface of the circuit board to prevent corrosion and oxidation. Transparent copper clad film also has good electrical insulation properties.

[0003] During the film lamination process, after the circuit board substrate is hot-pressed and laminated by the roller, the film behind the substrate is cut after the substrate moves out of the roller range, and the next substrate enters the roller for repeated hot pressing. In this way, the distance between the two substrates is too large, and the two substrates are connected by the film. After the film is cut, there is a lot of film remaining at both ends of the substrate, resulting in a high film hanging rate on the substrate, causing waste of copper coating and increasing processing costs. Summary of the invention

[0004] The purpose of the present invention is to provide a printed circuit board surface film laminating device, which has the advantages of being able to cut the film body at the roller body immediately after the substrate lamination is completed, thereby improving the processing efficiency, reducing the film hanging rate on the substrate, avoiding excess film waste, and saving processing costs.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solutions: a printed circuit board surface film pasting device, comprising two conveyor beds for conveying substrates, a film pasting assembly is arranged between the two conveyor beds;

[0006] The film laminating assembly comprises an upper pressing roller and a lower pressing roller which are symmetrically arranged and can rotate. When the substrate moves between the upper pressing roller and the lower pressing roller, the upper pressing roller presses the film body onto the surface of the substrate. The surface of the lower pressing roller is covered with an outer ring. The outer wall of the lower pressing roller is provided with a mounting groove for accommodating the cutting piece. The upper end of the outer ring is provided with a notch for ejecting the cutting piece. The cutting piece is elastically connected to the mounting groove and rotates synchronously with the lower pressing roller. A distance adjusting piece is provided between the upper pressing roller and the lower pressing roller. The distance adjusting piece is used to set the distance between two adjacent substrates, and the distance between the two adjacent substrates is used for the cutting piece to pass through to cut the mold body.

[0007] Furthermore, the film laminating assembly further comprises a guide roller group and a raw material roller arranged above the upper pressing roller, and the film body on the raw material roller passes through the guide roller group and is pressed under the upper pressing roller.

[0008] Furthermore, the cutting element includes a vertical blade and pressure blocks arranged at both ends of the vertical blade.

[0009] Furthermore, the upper end of the pressure block is trapezoidal in shape, and both ends of the notch are symmetrical inclined surfaces. When the pressure block rotates with the lower pressure roller, the inclined surface on one side of the pressure block fits with the inclined surface at one end of the notch to squeeze the pressure block.

[0010] Furthermore, the bottom ends of the pressing block and the vertical blade are both extended and retracted in the mounting groove by means of a spring, and the mounting groove is used for guiding the extension and retraction of the pressing block and the vertical blade.

[0011] Furthermore, the cutting elements are provided in a plurality and arranged in an annular array on the outer surface of the lower pressing roller, and the outer surface array of the lower pressing roller has mounting grooves corresponding to the cutting elements.

[0012] Furthermore, the distance adjusting member includes a first top plate, a second top plate and a linkage member, and the distance between the first top plate and the second top plate is used to determine the distance between two adjacent base plates.

[0013] Furthermore, the linkage member includes a linkage shaft and a first gear and a second gear sleeved on both ends of the linkage shaft, a first rack meshing with the first gear is arranged below the first top plate, and a linkage plate is arranged below the second top plate.

[0014] Furthermore, a second rack meshing with the second gear is arranged on the linkage plate, the second top plate and the linkage plate are connected by a spring, and the bottom of the first top plate is connected to the fixing member by a spring.

[0015] Furthermore, a squeezing roller is arranged between the first top plate and the second top plate, and the squeezing roller is arranged above the substrate and pressed against the upper end surface of the substrate.

[0016] Technical effects and advantages of the present invention:

[0017] 1. The vertical blade of the present invention is pushed out under the action of the elastic member to divide the film body at the gap between the two substrates. Since the two ends of the vertical blade are inclined surfaces corresponding to the inclined surfaces at the two ends of the notch, when the vertical blade rotates, the inclined surface of the vertical blade is pressed and fitted with the inclined surface at one end of the notch, and is squeezed by the inclined surface of the notch, so that the vertical blade can shrink inward along the installation groove, so that the film body can be cut at the roller body immediately after the substrate coating is completed, thereby improving the processing efficiency, reducing the film hanging rate on the substrate, avoiding excess film waste, and saving processing costs.

[0018] 2. The distance adjusting member of the present invention can be a combination of a plate body and a cylinder, the output end of the cylinder is connected to the plate body, and a detector is arranged on the distance adjusting member for detecting the movement of the substrate. When it is detected that the previous substrate moves away from under the plate body, the cylinder drives the plate body to press down, so that the plate body is inserted between the two substrates to resist the latter substrate. When the distance between the two substrates is adjusted, the cylinder drives the plate body to move upward, and the latter substrate moves synchronously with the previous substrate after being fixed in distance. The distance adjusting member can ensure that the distance between the two substrates can meet the cutting requirements while not being too large, thereby avoiding excess waste of film.

[0019] 3. The pressure block of the present invention protrudes slightly more than the vertical blade. When the two pressure blocks are pushed out, they contact the lower end surface of the substrate in advance, and the tip of the vertical blade will not directly contact the lower end surface of the substrate, thereby avoiding damage to the lower end surface of the substrate, and the cutting surface of the vertical blade cooperates with the bottom end of the upper pressure roller for cutting. The vertical distance between the two pressure blocks and the upper pressure roller is greater than the vertical distance between the vertical blade and the upper pressure roller. When the vertical blade is pushed upward to cut the film body, the two pressure blocks will not affect the vertical blade, and the pressure blocks will press the cut film body. During the rotation of the upper and lower pressure rollers, the pressure block on one side of the vertical blade rotates to just below the upper pressure roller, and the pressure block cooperates with the upper pressure roller to clamp the film body and continuously convey it, thereby realizing continuous conveying of the film body and preventing the film body from dislocating after cutting. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a cross-sectional view of the film sticking assembly structure of the present invention;

[0022] Figure 3 For the present invention Figure 2 A magnified image of point A;

[0023] Figure 4 It is a schematic diagram of the structure of the distance adjusting member of the present invention;

[0024] Figure 5 For the present invention Figure 4 A magnified view of point B;

[0025] Figure 6 It is an enlarged view of the local structure of the distance adjusting member of the present invention;

[0026] Figure 7 It is a cross-sectional view of the structure of the lower pressing roller according to the second embodiment of the present invention;

[0027] Figure 8 For the present invention Figure 7 Enlarged view of point C;

[0028] Fig. 9 It is a cross-sectional plan view of the lower pressure roller structure of the present invention;

[0029] Fig.10 For the present invention Fig. 9 Enlarged view of point D.

[0030] In the figure:

[0031] 1. Conveyor bed; 2. Film laminating assembly; 21. Upper pressure roller; 22. Lower pressure roller; 221. Mounting groove; 23. Outer ring; 231. Notch; 24. Guide roller group; 25. Raw material roller; 3. Cutting member; 31. Vertical blade; 32. Pressure block; 4. Distance adjusting member; 41. First top plate; 411. First rack; 42. Second top plate; 43. Linkage member; 431. Linkage shaft; 432. First gear; 433. Second gear; 44. Linkage plate; 441. Second rack; 45. Extrusion roller. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0033] Embodiment 1, refer to Figure 1 - Figure 3 , which is the first embodiment of the present invention, provides a printed circuit board surface film pasting device, including two conveyor beds 1 for conveying substrates, a film pasting assembly 2 is arranged between the two conveyor beds 1, and a plurality of conveyor rollers are arranged on the conveyor bed 1. The driving rods of the plurality of conveyor rollers are connected by belts, and the driving rod of one of the conveyor rollers is connected to the lower pressure roller 22 by a belt, so as to realize the conveying of the substrate while pasting the film.

[0034] The film laminating assembly 2 comprises an upper pressing roller 21 and a lower pressing roller 22 which are symmetrically arranged and can rotate. When the substrate moves between the upper pressing roller 21 and the lower pressing roller 22, the upper pressing roller 21 presses the film body onto the surface of the substrate. The surface of the lower pressing roller 22 is covered with an outer sleeve ring 23. The outer wall of the lower pressing roller 22 is provided with a mounting groove 221 for accommodating the cutting piece 3. The upper end of the outer sleeve ring 23 is provided with a notch 231 for ejecting the cutting piece 3. The cutting piece 3 is elastically connected to the mounting groove 221 and rotates synchronously with the lower pressing roller 22. A distance adjusting piece 4 is provided between the upper pressing roller 21 and the lower pressing roller 22. The distance adjusting piece 4 is used to set the distance between two adjacent substrates, and the distance between the two adjacent substrates is used for the cutting piece 3 to pass through. The mold body is cut, and the upper pressing roller 21 and the lower pressing roller 22 rotate to press the film body onto the surface of the substrate, and drive the coated substrate to move. During the movement, the distance adjusting member 4 is used to adjust the distance between the two substrates to ensure that the distance between the two substrates can allow the cutting member 3 to pass through, and the film body between the two substrates is cut, and the cutting is performed while rolling. By cutting the film body between the two substrates, the excess film body adhesion on the substrate is reduced, and the excess film body is avoided. The film body is cut between the two upper pressing rollers 21 and the lower pressing roller 22, and the cut film body can also be pressed together with the next substrate by the upper pressing roller 21, so that the next film body is pressed effectively, and the convenience of pressing is improved.

[0035] Electric heating rods are provided inside the upper pressing roller 21 and the lower pressing roller 22, and two of the upper pressing roller 21 and the lower pressing roller 22 are arranged side by side. The electric heating rods heat the roller bodies, and hot pressing is performed while the film body is pressed onto the surface of the substrate to achieve close fitting between the substrate and the film body.

[0036] The film laminating assembly 2 also includes a guide roller group 24 and a raw material roller 25 arranged above the upper pressure roller 21, and also includes a bracket for installing the upper pressure roller 21, the guide roller group 24 and the raw material roller 25. The film on the raw material roller 25 passes through the guide roller group 24 and is pressed against the guide roller group 24 below the upper pressure roller 21. The guide roller group 24 includes a plurality of rollers for the film to pass through and guide the film. The raw material roller 25 is wound with a film, and the raw material roller 25 is detachably connected to the bracket. When the film on the raw material roller 25 is used up, the raw material roller 25 can be removed and replaced with a new one.

[0037] The cutting member 3 includes a vertical blade 31 and an elastic member. The vertical blade 31 is arranged in the mounting groove 221 through the elastic member and can be retracted in the mounting groove 221. The blade head of the vertical blade 31 is triangular, and the two ends of the notch 231 are symmetrical oblique surfaces. When the vertical blade 31 rotates to the notch 231, the tail end of the upper substrate moves to open the notch 231, and the vertical blade 31 is pushed out under the action of the elastic member to divide the film body at the gap between the two substrates. The two ends of 31 are inclined surfaces, which correspond to the inclined surfaces at the two ends of the slot 231. When the vertical blade 31 rotates, the inclined surface of the vertical blade 31 is pressed and fitted with the inclined surface at one end of the slot 231. The vertical blade 31 is squeezed by the inclined surface of the slot 231, so that the vertical blade 31 can shrink inward along the mounting groove 221, so that the film body can be cut immediately at the roller body after the substrate coating is completed, thereby improving the processing efficiency, reducing the film hanging rate on the substrate, avoiding excess film waste, and saving processing costs.

[0038] There are several cutting members 3 arranged in a circular array on the outer surface of the lower pressing roller 22. The outer surface array of the lower pressing roller 22 has mounting grooves 221 corresponding to the cutting members 3. Since the cutting members 3 rotate along with the lower pressing roller 22, each cutting member 3 will be pushed upward when it rotates to the mounting groove 221 without the restriction of the outer ring 23. When the substrate above the groove 231 is not removed, the cutting member 3 is blocked by the bottom surface of the substrate and cannot be pushed out. When the substrate is removed from the groove 231, the cutting member 3 in the mounting groove 221 at the corresponding position is not blocked and is pushed upward to cut the film between the two substrates.

[0039] The distance adjusting member 4 can be a combination of a plate body and a cylinder, the output end of the cylinder is connected to the plate body, and a detector is arranged on the distance adjusting member 4 for detecting the movement of the substrate. When it is detected that the previous substrate moves away from under the plate body, the cylinder drives the plate body to press down, so that the plate body is inserted between the two substrates to resist the latter substrate. When the distance between the two substrates is adjusted, the cylinder drives the plate body to move upward, and the latter substrate moves synchronously with the previous substrate after being fixed in distance. The distance adjusting member 4 can ensure that the distance between the two substrates can meet the cutting requirements while not being too large, thereby avoiding waste of excess film.

[0040] Example 2, refer to Figure 4 - Figure 6, which is a second embodiment of the present invention. This embodiment is different from the first embodiment in that the distance adjusting member 4 also includes a first top plate 41, a second top plate 42 and a linkage member 43. The distance between the first top plate 41 and the second top plate 42 is used to set the distance between two adjacent substrates. The linkage member 43 includes a linkage shaft 431 and a first gear 432 and a second gear 433 sleeved on both ends of the linkage shaft 431. A first rack 411 meshing with the first gear 432 is arranged below the first top plate 41, a linkage plate 44 is arranged below the second top plate 42, and a second rack 441 meshing with the second gear 433 is arranged on the linkage plate 44. The second top plate 42 and the linkage plate 44 are connected by a spring. The bottom of the first top plate 41 is connected to the fixing member by a spring. An extrusion roller 45 is arranged between the first top plate 41 and the second top plate 42. The extrusion roller 45 is arranged above the substrate and pressed against the upper end surface of the substrate. When the tail end of one substrate moves away from above the second top plate 42, the upper end of the second top plate 42 is not restricted, and the second top plate 42 is pushed out under the action of the spring to limit the second substrate. When the tail end of the previous substrate moves away from above the first top plate 41, the upper end of the first top plate 41 is not restricted, and the first top plate 41 is pushed out under the action of the spring. When the first top plate 41 moves up, it drives the first rack 411 to move up, thereby driving the first gear 432 and the linkage shaft 431 to rotate. When the linkage shaft 431 rotates, it drives the second gear 433 to rotate, and the second gear 433 meshes with the second rack 441, thereby driving the second rack 441 and the linkage plate 44 to move downward. The linkage plate 44 pulls the second top plate 42 downward through the spring. At this time, the second top plate 42 does not limit the second substrate, and the second substrate moves with the conveyor, completing the adjustment of the distance between the two substrates without affecting the coating of the front substrate.

[0041] An inclined plate is provided below the squeezing roller 45, and the inclined plate is installed on the conveyor bed 1 through a bearing. An extension rod is provided at one end of the first top plate 41, and one end of the inclined plate rests on the top of the extension rod. When the initial end of the substrate moves below the squeezing roller 45, the substrate docks with the inclined plate, and the substrate squeezes the inclined plate when moving, so that the inclined plate tilts and squeezes the first top plate 41, so that the first top plate 41 retracts into the groove, which does not affect the movement of the substrate to between the upper pressure roller 21 and the lower pressure roller 22.

[0042] Example 3, refer to Figure 7 - Fig.10 , which is the third embodiment of the present invention. This embodiment is different from the second embodiment. Since the vertical blade 31 is squeezed by the elastic member and is always in a force contraction state, when it rotates to the notch 231, there is no outer ring 23 to limit it. If the upper substrate is not removed, the vertical blade 31 will be ejected and will directly contact the lower end surface of the upper substrate. The upper end surface of the vertical blade 31 is the cutting surface. When the vertical blade 31 contacts the lower end surface of the substrate, it will cause damage to the lower end surface of the substrate, affecting the quality of the substrate.

[0043] In order to solve the above problems, the present embodiment respectively provides pressure blocks 32 at both ends of the vertical blade 31, and the two pressure blocks 32 are connected to the bottom end of the vertical blade 31. The lower pressure roller 22 is provided with a mounting groove 221 which is adaptive to the pressure block 32, and the upper end of the pressure block 32 is trapezoidal. When the pressure block 32 rotates following the lower pressure roller 22, the inclined surface on one side of the pressure block 32 is in contact with the inclined surface at one end of the slot 231 and squeezes the pressure block 32. The pressure block 32 and the bottom end of the vertical blade 31 are both extended and retracted in the mounting groove 221 by a spring. The mounting groove 221 is used for guiding the pressure block 32 and the vertical blade 31 to extend and retract. By providing the pressure blocks 32 at both ends of the vertical blade 31, when the vertical blade 31 is ejected, the two pressure blocks 32 are ejected together, and the two pressure blocks 32 protrude slightly more than the vertical blade 31. When The two pressing blocks 32 will contact the lower end surface of the substrate in advance when they are pushed out, and the tip of the vertical blade 31 will not directly contact the lower end surface of the substrate, thereby avoiding damage to the lower end surface of the substrate, and the cutting surface of the vertical blade 31 cooperates with the bottom end of the upper pressure roller 21 for cutting, and the vertical distance between the two pressing blocks 32 and the upper pressure roller 21 is greater than the vertical distance between the vertical blade 31 and the upper pressure roller 21. When the vertical blade 31 is pushed upward to cut the film body, the two pressing blocks 32 will not affect the vertical blade 31, and the pressing blocks 32 press the cut film body. During the rotation of the upper and lower pressure rollers 21, the pressing block 32 on one side of the vertical blade 31 rotates to just below the upper pressure roller 21, and the pressing block 32 cooperates with the upper pressure roller 21 to clamp the film body and continuously convey it, thereby realizing continuous film conveying and preventing the film body from dislocating after cutting.

[0044] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A printed circuit board surface film mounting device, comprising two conveyor beds (1) for conveying substrates, characterized in that: A film sticking assembly (2) is arranged between the two conveyor beds (1); The film laminating assembly (2) comprises an upper pressing roller (21) and a lower pressing roller (22) which are symmetrically arranged and rotatable. When the substrate moves between the upper pressing roller (21) and the lower pressing roller (22), the upper pressing roller (21) presses the film body onto the surface of the substrate. The surface of the lower pressing roller (22) is covered with an outer sleeve (23). The outer wall of the lower pressing roller (22) is provided with a mounting groove (221) for accommodating a cutting piece (3). The upper end of the outer sleeve (23) is provided with a notch (231) for ejecting the cutting piece (3). The cutting piece (3) is elastically connected to the mounting groove (221) and rotates synchronously with the lower pressing roller (22). A distance adjusting piece (4) is provided between the upper pressing roller (21) and the lower pressing roller (22). The distance adjusting piece (4) is used to set the distance between two adjacent substrates, and the distance between the two adjacent substrates is used for the cutting piece (3) to pass through to cut the mold body.

2. A printed circuit board surface film mounting device according to claim 1, characterized in that: The film laminating assembly (2) further comprises a guide roller group (24) and a raw material roller (25) arranged above the upper pressure roller (21); the film on the raw material roller (25) passes through the guide roller group (24) and is pressed under the upper pressure roller (21).

3. A printed circuit board surface film mounting device according to claim 2, characterized in that: The cutting member (3) comprises a vertical blade (31) and pressing blocks (32) arranged at both ends of the vertical blade (31).

4. A printed circuit board surface film mounting device according to claim 3, characterized in that: The upper end of the pressing block (32) is in a trapezoidal shape, and the two ends of the notch (231) are symmetrical oblique surfaces. When the pressing block (32) rotates following the lower pressing roller (22), the oblique surface on one side of the pressing block (32) abuts against the oblique surface at one end of the notch (231) to squeeze the pressing block (32).

5. A printed circuit board surface film mounting device according to claim 4, characterized in that: The bottom ends of the pressing block (32) and the vertical blade (31) are both retracted and contracted in the mounting groove (221) by means of a spring, and the mounting groove (221) is used to guide the pressing block (32) and the vertical blade (31) to retract and contract.

6. A printed circuit board surface film mounting device according to claim 5, characterized in that: The cutting pieces (3) are provided in a plurality and arranged in an annular array on the outer surface of the lower pressing roller (22); the outer surface of the lower pressing roller (22) is provided with an array of mounting grooves (221) corresponding to the cutting pieces (3).

7. A printed circuit board surface film mounting device according to claim 6, characterized in that: The distance adjusting member (4) comprises a first top plate (41), a second top plate (42) and a linkage member (43); the distance between the first top plate (41) and the second top plate (42) is used to set the distance between two adjacent base plates.

8. A printed circuit board surface film mounting device according to claim 7, characterized in that: The linkage member (43) comprises a linkage shaft (431) and a first gear (432) and a second gear (433) sleeved on both ends of the linkage shaft (431); a first rack (411) meshing with the first gear (432) is arranged below the first top plate (41); and a linkage plate (44) is arranged below the second top plate (42).

9. A printed circuit board surface film mounting device according to claim 8, characterized in that: The linkage plate (44) is provided with a second rack (441) meshing with the second gear (433); the second top plate (42) and the linkage plate (44) are connected by a spring; and the bottom of the first top plate (41) is connected to a fixing member by a spring.

10. A printed circuit board surface film mounting device according to claim 9, characterized in that: A squeezing roller (45) is arranged between the first top plate (41) and the second top plate (42); the squeezing roller (45) is arranged above the substrate and is pressed against the upper end surface of the substrate.

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