CN115342740B - Copper foil thickness measuring equipment - Google Patents
Copper foil thickness measuring equipment Download PDFInfo
- Publication number
- CN115342740B CN115342740B CN202210923411.2A CN202210923411A CN115342740B CN 115342740 B CN115342740 B CN 115342740B CN 202210923411 A CN202210923411 A CN 202210923411A CN 115342740 B CN115342740 B CN 115342740B
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- China
- Prior art keywords
- frame
- thickness measuring
- horizontal
- copper foil
- laser displacement
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 56
- 239000011889 copper foil Substances 0.000 title claims abstract description 52
- 238000006073 displacement reaction Methods 0.000 claims abstract description 52
- 239000000463 material Substances 0.000 claims abstract description 42
- 238000007599 discharging Methods 0.000 claims abstract description 7
- 238000005096 rolling process Methods 0.000 claims abstract description 5
- 238000012360 testing method Methods 0.000 abstract description 6
- 238000005259 measurement Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
- G01B11/06—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention provides copper foil thickness measuring equipment which comprises a frame, a discharging assembly, a horizontal assembly and a thickness measuring assembly, wherein the discharging assembly comprises two material rollers respectively arranged at two sides of the frame; the horizontal assembly comprises two horizontal rollers arranged between the two material rollers, and at least one horizontal roller is adjustably arranged on the frame; the thickness measuring assembly comprises a laser thickness measuring assembly fixedly arranged on one side of the frame, and the laser thickness measuring assembly comprises a first laser displacement sensor and a second laser displacement sensor which are oppositely arranged on the upper side and the lower side of the horizontal roller. According to the copper foil thickness measuring equipment, the two material rollers are arranged, one of the two material rollers is used for placing copper foil materials, the other material roller is used for rolling and moving the copper foil materials, so that the thickness measuring assembly can conveniently detect different positions of a copper foil roll, and the horizontal rollers are arranged between the two material rollers, at least one of the horizontal rollers can be debugged and arranged on the frame, so that a part of copper foil to be detected can be kept in a horizontal state, and the testing precision is ensured.
Description
Technical Field
The invention relates to the technical field of copper foil processing, in particular to copper foil thickness measuring equipment.
Background
Copper foil is a thin, continuous metal foil deposited on a circuit board substrate layer as an electrical conductor of a PCB. It is easily adhered to the insulating layer, receives the printed protection layer, and forms a circuit pattern after corrosion.
In the production and processing process of the copper foil, the thickness of the copper foil needs to be detected, in the prior art, the thickness of the copper foil is detected through a laser thickness gauge, namely, the thickness of the copper foil is detected through the cooperation of laser displacement sensors arranged on the upper side and the lower side of the copper foil, the copper foil needs to be in a horizontal state as much as possible during testing, the output direction of a laser line and the surface of the copper foil are in a vertical state, so that the measurement precision is ensured, and the measurement precision is influenced when the copper foil is in a bent or non-horizontal state.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide copper foil thickness measuring equipment and aims to solve the technical problem of poor measuring precision in the prior art.
In order to achieve the above object, the present invention is achieved by the following technical scheme: the copper foil thickness measuring equipment comprises a frame, a discharging assembly, a horizontal assembly and a thickness measuring assembly, wherein the discharging assembly comprises two material rollers respectively arranged on two sides of the frame; the horizontal assembly comprises two horizontal rollers arranged between the two material rollers, and at least one horizontal roller is adjustably arranged on the frame; the thickness measuring assembly comprises a laser thickness measuring assembly fixedly arranged on one side of the frame, and the laser thickness measuring assembly comprises a first laser displacement sensor and a second laser displacement sensor which are oppositely arranged on the upper side and the lower side of the horizontal roller.
Compared with the prior art, the invention has the beneficial effects that: through setting up the frame, set up two material rollers in the frame both sides, set up two horizontal rollers between two material rollers, the upper and lower both sides of horizontal roller are equipped with thickness measurement subassembly, and above-mentioned two material rollers are used for placing copper foil material one of them, and another is used for rolling up the removal to copper foil material to thickness measurement subassembly detects the different positions of copper foil roll, through setting up horizontal roller between two material rollers, and wherein at least one horizontal roller is adjustable to be located in the frame, can make the partial copper foil that waits to detect keep the horizontality, in order to guarantee the test accuracy.
According to an aspect of the above technical solution, the thickness measuring assembly further includes a plurality of third laser displacement sensors disposed at one side of the first laser displacement sensor, where the third laser displacement sensors and the first laser displacement sensors are at a same horizontal height.
According to an aspect of the above technical solution, the copper foil thickness measuring device further includes a display assembly, where the display assembly includes a display screen electrically connected to the first laser displacement sensor, the second laser displacement sensor, and the third laser displacement sensor.
According to an aspect of the above technical solution, the thickness measuring assembly further includes a fixing frame disposed on the upper side of the frame, the fixing frame includes a body portion crossing over two sides of the frame, and an extension portion perpendicular to the body portion, the first laser displacement sensor and the plurality of third laser displacement sensors are disposed on the body portion, and the second laser displacement sensor is disposed on one side of the extension portion.
According to one aspect of the above technical scheme, the horizontal roller comprises a roller body, and a first mounting sleeve and a second mounting sleeve which are arranged on two sides of the roller body, wherein an adjusting frame is arranged on the frame, and the first mounting sleeve and the second mounting sleeve are adjustably arranged on the adjusting frame.
According to one aspect of the above technical scheme, the adjusting frame comprises a threaded rod arranged on one side of the frame, the threaded rod is rotatably arranged on the frame, and the first mounting sleeve is in threaded connection with the threaded rod.
According to an aspect of the above technical solution, the adjusting frame further includes a guide rod disposed at one side of the threaded rod, the guide rod is fixed on the frame, the second mounting sleeve is slidably disposed on the guide rod, and a fastener is detachably disposed between the second mounting sleeve and the guide rod.
According to one aspect of the above technical solution, an adjusting handle is fixed on one side of the threaded rod.
According to an aspect of the above technical scheme, the copper foil thickness measuring device further comprises a calibration assembly, the calibration assembly comprises a connecting frame arranged between the two horizontal rollers, and a level tube is arranged on the connecting frame.
According to an aspect of the above technical solution, the horizontal heights of the two horizontal rollers are higher than the horizontal height of the two material rollers.
Drawings
FIG. 1 is a schematic diagram showing a structure of a copper foil thickness measuring apparatus according to a first embodiment of the present invention;
FIG. 2 is an enlarged view of portion A of FIG. 1;
description of main reference numerals:
| rack | 10 | Material roller | 21 |
| Horizontal roller | 30 | Guide rod | 31 |
| First mounting sleeve | 32 | Roller body | 33 |
| Threaded rod | 34 | Second installation sleeve | 35 |
| Adjusting handle | 36 | First laser displacement sensor | 41 |
| Second laser displacement sensor | 42 | Third laser displacement sensor | 43 |
| Display screen | 51 | Body part | 61 |
| Extension part | 62 | Fixing frame | 60 |
| Level tube | 71 | Fastening piece | 81 |
The invention will be further described in the following detailed description in conjunction with the above-described figures.
Detailed Description
In order that the invention may be readily understood, a more complete description of the invention will be rendered by reference to the appended drawings. Several embodiments of the invention are presented in the figures. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "mounted" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1 to 2, a copper foil thickness measuring apparatus according to an embodiment of the present invention includes a frame 10, a discharging assembly, a horizontal assembly and a thickness measuring assembly, wherein the discharging assembly includes two material rollers 21 respectively disposed at two sides of the frame 10; the horizontal assembly comprises two horizontal rollers 30 arranged between the two material rollers 21, wherein at least one horizontal roller 30 is adjustably arranged on the frame 10; the thickness measuring assembly comprises a laser thickness measuring assembly fixedly arranged on one side of the frame 10, and the laser thickness measuring assembly comprises a first laser displacement sensor 41 and a second laser displacement sensor 42 which are oppositely arranged on the upper side and the lower side of the horizontal roller 30.
The copper foil thickness measuring equipment in this embodiment sets up two material rollers 21 through setting up frame 10, sets up two horizontal rollers 30 in frame 10 both sides, and the upper and lower both sides of horizontal roller 30 are equipped with thickness measuring subassembly, and above-mentioned two material rollers 21 are used for placing copper foil material and roll up, and another material roller 21 is used for carrying out the rolling to the copper foil material and removes to the thickness measuring subassembly detects the different positions of copper foil roll up, through setting up horizontal roller 30 between two material rollers 21, and wherein at least one horizontal roller 30 can debug and locate on frame 10, can make the partial copper foil that waits to detect keep the horizontality, in order to guarantee the test accuracy.
Further, in this embodiment, the thickness measuring assembly further includes a plurality of third laser displacement sensors 43 disposed on one side of the first laser displacement sensor 41, where the third laser displacement sensors 43 and the first laser displacement sensor 41 are at the same level. Specifically, in some application scenarios of this embodiment, the copper foil to be detected is in a horizontal state by the adjustable horizontal roller 30, and the bottom of the copper foil to be detected is in the same height, and by setting a plurality of third laser displacement sensors 43 on one side of the first laser displacement sensor 41, and the third laser displacement sensors 43 are in the same horizontal height with the first laser displacement sensor 41, by comparing the distance differences obtained by the plurality of third laser displacement sensors 43 and the first laser displacement sensor 41, the thicknesses of different positions of the copper foil to be detected can be obtained at the same time, so as to determine whether the thicknesses of the left and right positions of the copper foil at the position to be detected are uniform, thereby improving the detection efficiency.
Further, in this embodiment, the copper foil thickness measuring apparatus further includes a display assembly, and the display assembly includes a display screen 51 electrically connected to the first laser displacement sensor 41, the second laser displacement sensor 42, and the third laser displacement sensor 43. Specifically, the display assembly further includes a control host between the sensor and the display screen 51, and is configured to process the data received by the sensor, and further output the processed data to the display screen 51, so that an operator can obtain the detection data in real time.
Specifically, in this embodiment, the thickness measuring assembly further includes a fixing frame 60 disposed on the upper side of the frame 10, the fixing frame 60 includes a body portion 61 that spans across two sides of the frame 10, and an extension portion 62 that is disposed perpendicular to the body portion 61, the first laser displacement sensor 41 and the plurality of third laser displacement sensors 43 are disposed on the body portion 61, and the second laser displacement sensor 42 is disposed on one side of the extension portion 62.
In addition, in the present embodiment, the two horizontal rollers 30 are both adjustably disposed on the frame 10, the horizontal rollers 30 include a roller body 33, and a first mounting sleeve 32 and a second mounting sleeve 35 disposed on two sides of the roller body 33, an adjusting frame is disposed on the frame 10, and the first mounting sleeve 32 and the second mounting sleeve 35 are adjustably disposed on the adjusting frame.
Further, in this embodiment, the adjusting frame includes a threaded rod 34 disposed at one side of the frame 10, the threaded rod 34 is rotatably disposed on the frame 10, the first mounting sleeve 32 is in threaded connection with the threaded rod 34, the adjusting frame further includes a guide rod 31 disposed at one side of the threaded rod 34, the guide rod 31 is fixed on the frame 10, the second mounting sleeve 35 is slidably disposed on the guide rod 31, and a fastener 81 is detachably disposed between the second mounting sleeve 35 and the guide rod 31. Specifically, the second mounting sleeve 35 is driven to move by rotating the threaded rod 34, and the second mounting sleeve 35 can drive the roller body 33 and the first mounting sleeve 32 to move synchronously, so that the first mounting sleeve 32 slides on the guide rod 31. In addition, the fastener 81 includes a bolt screwed to the second mounting bush 35, and the height of the second mounting bush 35 is adjusted by abutting the bolt against the outer wall of the guide bar 31.
Further, in this embodiment, the copper foil thickness measuring apparatus further includes a calibration assembly including a connecting frame disposed between the two horizontal rollers 30, and a leveling pipe 71 is disposed on the connecting frame. Specifically, by providing a connection frame between the two horizontal rollers 30, in this embodiment, the connection frame is disposed between the two first mounting sleeves 32, and it can be understood that, for facilitating the height adjustment of any one of the horizontal rollers 30, the connection frame is rotatably disposed on one side of the first mounting sleeve 32, and by providing the leveling pipe 71, the horizontal state between the two horizontal rollers 30 is observed based on the leveling marks, and the subsequent horizontal adjustment is facilitated.
In some application scenarios of this embodiment, when the leveling tube 71 shows a non-horizontal state between the two horizontal rollers 30, the fastener 81 is first loosened, the second mounting sleeve 35 can move relative to the guide rod 31, the first mounting sleeve 32 moves relative to the threaded rod 34 by rotating the threaded rod 34, and the second mounting sleeve 35 and the roller body 33 are driven to move synchronously by the movement of the first mounting sleeve 32, so as to adjust the height of the horizontal rollers 30 until the leveling tube 71 indicates a horizontal state. In addition, to facilitate rotation of the threaded rod 34, in this embodiment, one of the threaded rods 34 is fixed with an adjustment knob 36.
In the present embodiment, the level of both the above-mentioned two horizontal rollers 30 is higher than the level setting of both the above-mentioned feed rollers 21. Specifically, the above arrangement can maintain a certain tension of the copper foil on the material roller 21, and prevent the copper foil from bending, which affects the test accuracy.
In summary, according to the copper foil thickness measuring device in the above embodiment of the present invention, by setting the frame 10, setting two material rollers 21 at two sides of the frame 10, setting two horizontal rollers 30 between the two material rollers 21, setting thickness measuring components at two upper and lower sides of the horizontal rollers 30, one of the two material rollers 21 is used for placing copper foil material, and the other is used for rolling and moving the copper foil material, so as to facilitate the thickness measuring components to detect different positions of the copper foil roll, setting the horizontal rollers 30 between the two material rollers 21, and at least one of the horizontal rollers 30 can be adjusted and set on the frame 10, so that a part of the copper foil to be detected can be kept in a horizontal state, thereby ensuring the test accuracy, setting a plurality of third laser displacement sensors 43 at one side of the first laser displacement sensors 41, and the third laser displacement sensors 43 and the first laser displacement sensors 41 at the same horizontal level, and simultaneously obtaining the difference in distance obtained by comparing the plurality of third laser displacement sensors 43 and the first laser displacement sensors 41, thereby obtaining the thickness of the copper foil to be measured at different positions, and judging whether the thickness of the copper foil to be measured at the positions is uniform, thereby improving the efficiency of detecting the left and right positions.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above examples merely represent a few embodiments of the present invention, which are described in more detail and are not to be construed as limiting the scope of the present invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of the invention should be assessed as that of the appended claims.
Claims (4)
1. A copper foil thickness measuring apparatus, comprising:
a frame;
the discharging assembly comprises two material rollers which are respectively arranged at two sides of the frame, wherein one material roller is used for placing a copper foil material roll, and the other material roller is used for rolling and moving the copper foil material roll;
the horizontal assembly comprises two horizontal rollers arranged between the two material rollers, and at least one horizontal roller is adjustably arranged on the frame; the horizontal heights of the two horizontal rollers are higher than the horizontal heights of the two material rollers; the horizontal roller comprises a roller body, a first mounting sleeve and a second mounting sleeve which are arranged on two sides of the roller body, an adjusting frame is arranged on the frame, and the first mounting sleeve and the second mounting sleeve are adjustably arranged on the adjusting frame; the adjusting frame comprises a threaded rod arranged on one side of the frame, the threaded rod is rotatably arranged on the frame, and the first mounting sleeve is in threaded connection with the threaded rod; the adjusting frame further comprises a guide rod arranged on one side of the threaded rod, the guide rod is fixed on the frame, the second mounting sleeve is slidably arranged on the guide rod, and a fastener is detachably arranged between the second mounting sleeve and the guide rod;
the thickness measuring assembly comprises a laser thickness measuring assembly fixedly arranged on one side of the frame, and the laser thickness measuring assembly comprises a first laser displacement sensor and a second laser displacement sensor which are oppositely arranged on the upper side and the lower side of the horizontal roller;
the thickness measuring assembly further comprises a plurality of third laser displacement sensors arranged on one side of the first laser displacement sensor, and the third laser displacement sensors and the first laser displacement sensors are positioned at the same horizontal height;
the copper foil thickness measuring equipment further comprises a calibration assembly, the calibration assembly comprises a connecting frame arranged between the two horizontal rollers, and a leveling tube is arranged on the connecting frame.
2. The copper foil thickness measuring apparatus of claim 1, further comprising a display assembly including a display screen electrically connected to the first, second, and third laser displacement sensors.
3. The copper foil thickness measuring apparatus according to claim 1, wherein the thickness measuring assembly further comprises a fixing frame provided on an upper side of the frame, the fixing frame comprises a body portion crossing over two sides of the frame, and an extension portion perpendicular to the body portion, the first laser displacement sensor and the plurality of third laser displacement sensors are provided on the body portion, and the second laser displacement sensor is provided on one side of the extension portion.
4. The copper foil thickness measuring apparatus according to claim 1, wherein an adjusting handle is fixed to one side of the threaded rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210923411.2A CN115342740B (en) | 2022-08-02 | 2022-08-02 | Copper foil thickness measuring equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210923411.2A CN115342740B (en) | 2022-08-02 | 2022-08-02 | Copper foil thickness measuring equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115342740A CN115342740A (en) | 2022-11-15 |
| CN115342740B true CN115342740B (en) | 2024-01-26 |
Family
ID=83950866
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210923411.2A Active CN115342740B (en) | 2022-08-02 | 2022-08-02 | Copper foil thickness measuring equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115342740B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2611643A1 (en) * | 2005-06-24 | 2006-12-28 | Avestor Limited Partnership | Method and apparatus for measuring a thickness of a thin film in motion |
| WO2012073401A1 (en) * | 2010-11-29 | 2012-06-07 | 野方 鉄郎 | Roll displacement measurement method and roll displacement measurement device using same, and film thickness measurement method and film thickness measurement device using same |
| CN104677300A (en) * | 2015-02-11 | 2015-06-03 | 北海和思科技有限公司 | Online measurement device and method for thickness of thin film |
| CN108151611A (en) * | 2017-12-05 | 2018-06-12 | 余姚敏宝卫浴洁具有限公司 | A kind of film monitoring device |
| CN210154530U (en) * | 2019-05-30 | 2020-03-17 | 洛阳隔宝隔膜科技有限公司 | Online thickness measuring device for flat membrane |
| CN111595248A (en) * | 2020-05-15 | 2020-08-28 | 何雨姗 | Film thickness gauge |
| CN212768860U (en) * | 2020-07-23 | 2021-03-23 | 汕头冠华薄膜工业有限公司 | Dual-purpose thickness measuring device of film |
| CN216081336U (en) * | 2021-11-10 | 2022-03-18 | 江西麦得豪新材料有限公司 | Copper foil uniform thickness detection processing device |
| CN114353674A (en) * | 2021-11-25 | 2022-04-15 | 安徽飞达电气科技有限公司 | Thickness measuring device capable of preventing capacitor film from being damaged by tension |
| CN216448814U (en) * | 2021-12-31 | 2022-05-06 | 常州市华实新材料科技有限公司 | Online thickness measuring device for film material |
-
2022
- 2022-08-02 CN CN202210923411.2A patent/CN115342740B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2611643A1 (en) * | 2005-06-24 | 2006-12-28 | Avestor Limited Partnership | Method and apparatus for measuring a thickness of a thin film in motion |
| WO2012073401A1 (en) * | 2010-11-29 | 2012-06-07 | 野方 鉄郎 | Roll displacement measurement method and roll displacement measurement device using same, and film thickness measurement method and film thickness measurement device using same |
| CN104677300A (en) * | 2015-02-11 | 2015-06-03 | 北海和思科技有限公司 | Online measurement device and method for thickness of thin film |
| CN108151611A (en) * | 2017-12-05 | 2018-06-12 | 余姚敏宝卫浴洁具有限公司 | A kind of film monitoring device |
| CN210154530U (en) * | 2019-05-30 | 2020-03-17 | 洛阳隔宝隔膜科技有限公司 | Online thickness measuring device for flat membrane |
| CN111595248A (en) * | 2020-05-15 | 2020-08-28 | 何雨姗 | Film thickness gauge |
| CN212768860U (en) * | 2020-07-23 | 2021-03-23 | 汕头冠华薄膜工业有限公司 | Dual-purpose thickness measuring device of film |
| CN216081336U (en) * | 2021-11-10 | 2022-03-18 | 江西麦得豪新材料有限公司 | Copper foil uniform thickness detection processing device |
| CN114353674A (en) * | 2021-11-25 | 2022-04-15 | 安徽飞达电气科技有限公司 | Thickness measuring device capable of preventing capacitor film from being damaged by tension |
| CN216448814U (en) * | 2021-12-31 | 2022-05-06 | 常州市华实新材料科技有限公司 | Online thickness measuring device for film material |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115342740A (en) | 2022-11-15 |
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