Transparent clamp of solder resist DI exposure machine
By using transparent pressure strips in the DI exposure machine, the problems of poor exposure at the substrate edge and light reflection caused by metal clamps were solved, resulting in more efficient exposure and gold halide utilization.
Patent Information
- Application Number
- CN202520581638.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-28
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2035-03-28
AI Technical Summary
The metal clamps of the DI exposure machine prevent the edges of the substrate from being exposed, resulting in wasted gold salts, and light reflection causes poor exposure of the pattern inside the board.
A pressure strip made of transparent material is placed on the pressure strip to ensure the substrate is flat and allow LED light to pass through while avoiding light reflection. It is connected to the original pressure strip by fasteners and is compatible with most medium and large panels.
It reduces the waste of gold salts during immersion gold surface treatment, improves exposure accuracy, and avoids poor exposure of patterns within the board.
Smart Images
Figure CN223857583U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of PCB board production, more particularly to a transparent clamp of solder mask DI exposure machine. BACKGROUND
[0002] With the continuous development of PCB industry, the related manufacturing industry chain of PCB board is continuously upgraded, and the PCB manufacturing equipment is more and more advanced and high-end. Taking the solder mask exposure machine as an example, it has developed from a manual exposure machine to a semi-automatic exposure machine and then to a DI exposure machine. Compared with the traditional exposure machine, the DI exposure machine directly scans the image, does not need to use exposure film for exposure, has higher exposure precision, and can automatically expand or shrink the image coefficient according to the alignment target data. However, the DI exposure machine also has some problems. Because there is no film and exposure glass, the board needs to be fixed by a clamp for auxiliary fixing, otherwise exposure failure will occur. Usually, the DI exposure machine is equipped with a metal clamp to clamp the board edge, and the clamp clamps a width of about 7mm of the board edge. At this time, the green oil covering area of about 7mm of the board edge cannot be exposed, and the exposed copper edge will be covered with gold after development, which will cause waste of gold salt. At the same time, because the material of the clamp is alloy steel, when exposed, the LED light will be reflected on the metal clamp, and the light will be refracted into the PCB board in severe cases, causing exposure failure of the pattern in the board. SUMMARY
[0003] The utility model aims at overcoming at least one defect (deficiency) of the prior art, providing a transparent clamp of solder mask DI exposure machine, which solves the problem that the substrate below the existing metal clamp of the DI exposure machine cannot be exposed, resulting in waste of gold salt.
[0004] The utility model adopts the technical scheme of a transparent clamp of solder mask DI exposure machine, which comprises a workbench, a driving mechanism and a film pressing strip. The driving mechanism is arranged on both sides of the workbench, and the film pressing strip is connected with the driving mechanism. The driving mechanism can drive the film pressing strip to move up and down. A pressing strip is arranged on the film pressing strip. The pressing strip is transparent.
[0005] When the substrate to be exposed is placed on the workbench, the position of the film pressing strip is adjusted, the driving mechanism is started, and the film pressing strip is moved downward, so as to drive the pressing strips to press on the left side edge and the right side edge of the substrate respectively, thereby ensuring the flatness of the substrate. The pressing strip is made of a transparent material that can be penetrated by light, so that the substrate below the pressing strip can also be exposed, and the copper skin of the board edge can be covered with ink after development, thereby reducing the waste of gold salt during gold surface treatment.
[0006] Further, the pressing strip is arranged on the film pressing strip by a fastener, and the fastener comprises a first part and a second part. The first part and the second part are connected by a buckle.
[0007] The film pressing strip is the original structure of the DI exposure machine, and the pressing strip is arranged on the film pressing strip through the fastener, so that the pressing strip can be fixed on the film pressing strip without damaging the original film pressing strip. The fastener includes a first part and a second part, and the first part is connected with the second part through clamping, which is simple and convenient to install and disassemble.
[0008] Further, the pressing strip is connected with the first part through a bolt.
[0009] The first part is a metal material, and the pressing strip is preferably an acrylic material, and the materials of the two are different, and the bolt connection is more convenient to use. When it needs to be replaced, it is also convenient to disassemble. And when the pressing strip presses the substrate, it needs to bear the upward force, and the bolt connection is relatively firm.
[0010] Further, the first part is a long slot, and both ends of the long slot are provided with ear plates protruding to both sides, and the second part is provided with a horizontal bar opposite to the ear plates.
[0011] The first part is a long slot, and when installed, the first part is located below the film pressing strip, the film pressing strip is in the groove of the first part, and the second part is located above the film pressing strip, and the horizontal bar of the second part is clamped with the ear plates at both ends of the first part, so that the fastener can be installed on the film pressing strip.
[0012] Further, the pressing strip is a rectangular long strip structure, which has a front side, a rear side, an upper side, a lower side, a left side and a right side, wherein the distance between the front side and the rear side of the pressing strip is the length of the pressing strip, the distance between the upper side and the lower side is the thickness of the pressing strip, and the distance between the left side and the right side is the width of the pressing strip. The upper side and the lower side are light-transmitting surfaces, and the other surfaces are matte surfaces.
[0013] The upper side and the lower side are set as light-transmitting surfaces in order to make the LED light better penetrate the pressing strip, so as to expose the substrate below, and the surfaces other than the upper side and the lower side are set as matte surfaces in order to prevent reflection of light when the LED light is irradiated thereon during exposure, thereby causing poor exposure of the pattern in the board.
[0014] Further, the length of the pressing strip is 700-800mm.
[0015] In the manufacture of PCB, the substrate size handled by the exposure machine is highly standardized, and the length of the pressing strip needs to match the standard size of the substrate. The length of the pressing strip is set to 700-800mm, which can be compatible with most medium and large panels, while ensuring uniform pressure.
[0016] Further, the width of the pressing strip is 6-10mm.
[0017] The spacer is made of transparent material, but the exposure effect of the spacer can be poor compared with the direct irradiation of LED light, so the width of the spacer should not be too wide to make the larger area of the substrate directly irradiated by the LED light. However, if the width of the two spacers is too narrow, the warped substrate can not be flattened, so the width of the spacer is set to 6-10mm.
[0018] Further, the thickness of the spacer is 10-20mm.
[0019] If the thickness of the spacer is less than 10mm, the strength can be insufficient to press the substrate flat on the workbench, or the spacer can be cracked or damaged. If the thickness of the spacer is greater than 20mm, the LED light passing through the spacer can be insufficient, resulting in poor exposure of the substrate under the first and second spacers.
[0020] Further, a protrusion is provided on any one of the spacers, and the protrusion is provided on the side of the spacer close to the workbench.
[0021] The protrusion serves as a tube pin, and the substrate is placed against the tube pin to ensure that the placement position of the substrate is correct.
[0022] Further, the bolt has a plurality of bolts, and the distance between adjacent two bolts is 100-200mm.
[0023] The smaller the pitch of the threaded hole, the more threaded holes on the first and second spacers, and too many threaded holes will reduce the strength of the first and second spacers, making them prone to cracking and damage when pressing the substrate. If the distance between adjacent two threaded holes is too large, the part between the threaded holes will be deformed with the warping of the substrate, and the substrate cannot be effectively pressed.
[0024] Compared with the prior art, the beneficial effects of the utility model are that: through setting the pressure strip of transparent material, LED light can penetrate the pressure strip, thereby exposing the substrate of the area below the pressure strip, and after developing, the copper skin of the plate edge can be covered by ink, thereby reducing the waste of gold salt during gold surface treatment. When exposed, the LED lamp is above the substrate, therefore, the upper side and the lower side of the pressure strip are polished to be transparent, thereby making more LED light penetrate the pressure strip, and the other surfaces of the pressure strip are set to be matte surfaces, which can avoid reflecting LED light and causing poor exposure of the pattern in the plate. The pressure strip is connected on the pressure film strip through the fastener, which can install the pressure strip on the pressure film strip without damaging the original pressure film strip structure. The fastener comprises a first part and a second part, the first part is connected with the second part through the clamping mode, then the fastener can be conveniently installed on the pressure film strip, and the disassembly is also simple. The first part is metal material, the pressure strip is preferably acrylic material, the materials of the two are different, and the connection of the two through the bolt is simpler and more convenient, and the connection is more firm. The length of the pressure strip is set to be 700-800mm, which can be compatible with most medium and large panels, and simultaneously ensure uniform pressure. The width is 6-10mm, which can ensure that the substrate is pressed flat, and at the same time, the width is as small as possible, so as to reduce the influence of the first pressure strip and the second pressure strip on the exposure effect. The thickness is 10-20mm, which can ensure that the structure has sufficient strength, and can ensure that there is enough LED light penetration. BRIEF DESCRIPTION OF DRAWINGS
[0025] Figure 1 It is the structural drawing of the utility model.
[0026] Figure 2 It is the enlarged view of A.
[0027] Figure 3 It is the structural drawing of the fastener and the pressure film strip.
[0028] Figure 4 It is the structural drawing of the left pressure strip installed on the first part.
[0029] Figure 5 It is the right view of the left pressure strip.
[0030] Figure 6 It is the top view of the left pressure strip.
[0031] Figure 7 It is the top view of the right pressure strip. DETAILED DESCRIPTION
[0032] The drawings of the utility model are only used for example description, and cannot be understood as the limitation of the utility model. In order to better illustrate the following embodiments, some components of the drawings can be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it can be understood that some known structures and their descriptions in the drawings can be omitted.
[0033] As shown in Figure 1 A transparent clamp for DI exposure machine of solder resist, comprising a workbench 1, a driving mechanism and a film pressing strip 2, the driving mechanism (not shown) is arranged on both sides of the workbench 1, the film pressing strip 2 is connected with the driving mechanism, the driving mechanism can drive the film pressing strip 2 to move up and down, the film pressing strip 2 is provided with a pressing strip 3, and the pressing strip 3 is transparent.
[0034] Specifically, the film pressing strip 2 is provided with two film pressing strips arranged on the left side and the right side of the workbench 1 respectively, the film pressing strip is a long strip-shaped metal strip, and the horizontal distance in the left-right direction of the film pressing strip can be manually adjusted.
[0035] As shown in Figures 2 to 4 The film pressing strip 2 is provided with a fastener 4, the fastener 4 comprises a first part 41 and a second part 42, the first part 41 is a long slot-shaped groove, the length of the first part 41 is same with the length of the film pressing strip 2, and the two ends of the first part 41 are respectively provided with ear plates 411 protruding to both sides. One first part 41 is provided with two second parts 42 in a matched mode, and the lower portion of the second part 42 is provided with opposite horizontal bars 421. When the fastener 4 is installed, the first part 41 is arranged below the film pressing strip 2, so that the film pressing strip 2 is located in the groove of the first part 41. The second part 42 is arranged above the film pressing strip 2, and the two second parts 42 are respectively arranged at both ends of the film pressing strip 2, the horizontal bars of the two second parts 42 are clamped with the ear plates 411 of the first part 41, so as to connect the fastener 4 on the film pressing strip 2.
[0036] As shown in Figures 5 to 7As shown, the pressing strip 3 is made of transparent material, rectangular long strip structure, with upper side, lower side, left side, right side, front side and back side, wherein, the upper side and the lower side are parallel to the workbench 1. The distance between the front side and the back side of the pressing strip is the length L of the pressing strip, the length L is 700-800mm; the distance between the upper side and the lower side is the thickness H of the pressing strip, the thickness H is 10-20mm; the distance between the left side and the right side is the width B of the pressing strip, the width B is 6-10mm. And the upper side and the lower side of the pressing strip 3 are polished bright, so that more LED light can penetrate, thereby improving the exposure effect of the substrate 5 below the pressing strip 3. The front side, back side, left side and right side of the pressing strip 3 are provided with a frosted surface, so as to prevent the reflection of LED light and cause the poor exposure of the pattern in the plate. A plurality of threaded holes are formed on the pressing strip 3, the threaded holes are formed along the length direction of the pressing strip 3 and penetrate through the left side and the right side of the pressing strip 3. The distance L1 between the adjacent two threaded holes is 100-200mm, and the distance L2 between the frontmost threaded hole and the rearmost threaded hole and the front side and the back side of the pressing strip 3 is 20-30mm, so as to prevent the excessive length of the reserved distance, which will be raised with the warping of the substrate when pressing the substrate, or the short reserved distance, which will reduce the strength of the two ends of the pressing strip 3 and cause the cracking of the two ends of the pressing strip 3. The right side of the left pressing strip 3 is provided with a protrusion 31, which is used as a pipe position pin, and the substrate is placed against the pipe position pin, so as to ensure the correct placement position of the substrate 5.
[0037] The two first components 41 are provided with threaded holes on the side close to the workbench 1, and the threaded holes are arranged at positions corresponding to the threaded holes on the pressing strip 3. During installation, the threaded holes on the pressing strip 3 are aligned with the threaded holes on the first component 41, and the two are fixed by using bolts.
[0038] As shown in the figure, Figure 1 During use, the horizontal distance between the two pressing film strips 2 is adjusted, so that when pressing, the pressing strip 3 can be pressed on the two side edges of the substrate 5, and the pressing film strip 2 is outside the range of the substrate, so that the pressing strip 3 can press the substrate 5 flat, and the LED light can penetrate the pressing strip 3 to expose the substrate 5 below.
[0039] Obviously, the above embodiments of the utility model are only examples for clearly illustrating the technical scheme of the utility model, and are not a limitation on the specific embodiments of the utility model. Any modification, equivalent replacement and improvement made within the spirit and principle of the utility model claim shall be included in the protection scope of the utility model claim.
Claims
1. A transparent clamp for a DI exposure machine for solder resist, comprising a worktable, a driving mechanism and a film pressing strip, the driving mechanism is arranged on both sides of the worktable, the film pressing strip is connected with the driving mechanism, the driving mechanism can drive the film pressing strip to move up and down, and a pressing strip is arranged on the film pressing strip, characterized in that, The pressing strip is transparent.
2. The clear clamp for a solder resist DI exposure machine according to claim 1, wherein The pressing strip is arranged on the pressing film strip through fasteners, and the fasteners comprise a first part and a second part, which are snap-connected.
3. The clear clamp for a solder resist DI exposure machine according to claim 2, wherein The pressing strip is connected with the first part through bolts.
4. The clear clamp for a solder resist DI exposure machine according to claim 2, wherein The first part is a long slot, and both ends of the long slot are provided with ear plates protruding to both sides, and the second part is provided with horizontal bars opposite to each other, which are snap-connected with the ear plates.
5. The transparent clamp for a solder resist DI exposure machine according to any one of claims 1 to 4, characterized in that, The pressing strip is a rectangular long strip structure, which has a front side, a rear side, an upper side, a lower side, a left side and a right side, wherein the distance between the front side and the rear side is the length of the pressing strip, the distance between the upper side and the lower side is the thickness of the pressing strip, and the distance between the left side and the right side is the width of the pressing strip, the upper side and the lower side are light-transmitting surfaces, and the other surfaces are matte surfaces.
6. The clear clamp for a solder resist DI exposure machine according to claim 5, wherein The length of the pressing strip is 700-800 mm.
7. The clear clamp for a solder resist DI exposure machine according to claim 5, wherein The width of the pressing strip is 6-10 mm.
8. The clear clamp for a solder resist DI exposure machine according to claim 5, wherein The thickness of the pressing strip is 10-20 mm.
9. The clear clamp for a solder resist DI exposure machine according to claim 5, wherein Any one of the pressing strips is provided with a protrusion, which is arranged on the side of the pressing strip close to the workbench.
10. The clear clamp for a solder resist DI exposure machine according to claim 3, wherein The bolts are multiple, and the distance between adjacent two bolts is 100-200 mm.