CN114900999B - Positioning structure for rivet holes of each layer of multilayer circuit board - Google Patents
Positioning structure for rivet holes of each layer of multilayer circuit board Download PDFInfo
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- CN114900999B CN114900999B CN202210661455.2A CN202210661455A CN114900999B CN 114900999 B CN114900999 B CN 114900999B CN 202210661455 A CN202210661455 A CN 202210661455A CN 114900999 B CN114900999 B CN 114900999B
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- circuit board
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- plate
- positioning
- connecting plates
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Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/46—Manufacturing multilayer circuits
- H05K3/4611—Manufacturing multilayer circuits by laminating two or more circuit boards
- H05K3/4638—Aligning and fixing the circuit boards before lamination; Detecting or measuring the misalignment after lamination; Aligning external circuit patterns or via connections relative to internal circuits
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/46—Manufacturing multilayer circuits
- H05K3/4611—Manufacturing multilayer circuits by laminating two or more circuit boards
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
- H05K2203/15—Position of the PCB during processing
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
- Y02W90/10—Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Production Of Multi-Layered Print Wiring Board (AREA)
Abstract
The invention relates to the technical field of circuit board processing, and discloses a rivet hole positioning structure of each layer of a multilayer circuit board, which comprises a fixed plate, wherein positioning mechanisms are arranged around the surface of the fixed plate; the jack that a plurality of evenly distributed has been seted up on the surface of fixed plate, the surface of fixed plate is equipped with four inserted bars that are the rectangle and distribute, four inserted bars insert respectively in the inside of four jacks, the inside of inserted bar is equipped with the joint mechanism that sets up with jack lateral wall joint, the tip of four inserted bars is all fixed and is equipped with the stock solution section of thick bamboo, the bottom of four stock solution section of thick bamboo all is equipped with the locating cone, one side of locating cone extends to the inside of stock solution section of thick bamboo, the locating cone is located one side of stock solution section of thick bamboo and is fixed and be equipped with the movable plate, the bottom inner wall symmetry of stock solution section of thick bamboo is fixed and is equipped with two slide bars. The rivet hole positioning structure for the multilayer circuit board can be used for positioning rivet holes at four corners of the circuit board at one time, and meanwhile, positioning circuit boards with different sizes can be finished, so that the processing efficiency of the multilayer circuit board is improved.
Description
Technical Field
The invention relates to the technical field of circuit board processing, in particular to a rivet hole positioning structure of each layer of a multilayer circuit board.
Background
In the PCB process, 6 or 8 rivet holes (according to the size of the board) on the edges of each layer of board are sequentially aligned and riveted through rivets to form the multi-layer board; the rivet hole is a center hole with the diameter of 3.175mm, and is drilled by a drill point with the diameter of 3.175 mm.
The patent number is CN102378492B, a locating structure of rivet holes of each layer of circuit board is disclosed, which is formed on the board edge of one side of each layer of circuit board, and comprises a copper foil area which is covered on the board edge of each layer of circuit board and has the area larger than the rivet holes, a concentric circular space and an annular space which is arranged at the periphery of the circular space are formed in the opening of the copper foil area, an annular copper foil layer is formed in the copper foil area between the circular space and the annular space, the outer diameter of the annular copper foil layer is the same as the aperture of the rivet holes, and the forming of the locating structure of the rivet holes is formed by etching the copper foil layer which is integrated with the circuit layer on the surface of the substrate in actual manufacture.
In the above scheme, only a single rivet hole on the multilayer circuit board is used for positioning, but the four corners of the circuit board which is known at present are provided with rivet holes, if the four rivet holes are positioned one by one and then processed, the processing procedure is increased, and therefore, each layer of rivet hole positioning structure capable of being positioned rapidly needs to be provided.
Disclosure of Invention
(one) solving the technical problems
Aiming at the defects of the prior art, the invention provides the rivet hole positioning structure for each layer of the multilayer circuit board, which can finish the rivet hole positioning at four corners of the circuit board at one time, can finish the positioning of circuit boards with different sizes, improves the processing efficiency of the multilayer circuit board, and solves the problem of low positioning efficiency of a plurality of rivet holes on the multilayer circuit board at present.
(II) technical scheme
In order to achieve the above purpose, the present invention provides the following technical solutions: the rivet hole positioning structure of each layer of the multilayer circuit board comprises a fixed plate, wherein positioning mechanisms are arranged around the surface of the fixed plate;
the surface of fixed plate has seted up a plurality of evenly distributed's jack, the surface of fixed plate is equipped with four inserted bars that are the rectangle distribution, four the inserted bars insert respectively in four the inside of jack, the inside of inserted bar is equipped with the joint mechanism that sets up with jack lateral wall joint, four the tip of inserted bar is all fixed and is equipped with the reservoir, four the bottom of reservoir all is equipped with the locating cone, one side of locating cone extends to the inside of reservoir, the locating cone is located the fixed movable plate that is equipped with in one side of reservoir, the bottom inner wall symmetry of reservoir is fixed and is equipped with two slide bars, the both sides of movable plate respectively with two the lever wall sliding connection of slide bar, two the upper end of slide bar is all fixed and is equipped with the dog, two the lever wall of slide bar all overlaps and is equipped with first spring, and the both ends of first spring respectively with dog and movable plate fixed connection, the inside of reservoir is equipped with ink.
Preferably, the positioning mechanism comprises a fixed ring, a screw rod, a positioning plate and a rocking handle, wherein the fixed ring is fixedly arranged on the surface of the fixed plate, an internal thread is arranged in the fixed ring, a rod wall thread of the screw rod is arranged in the fixed ring, one end of the screw rod is rotationally connected with the side surface of the positioning plate, and the other end of the screw rod is fixedly connected with the rocking handle.
Preferably, the side surface of the positioning plate is fixedly embedded with a bearing, and one end of the screw rod is rotationally connected with the side surface of the positioning plate through the bearing.
Preferably, the positioning plate is a wedge plate, and the inclined surface of the positioning plate is far away from one side of the fixing plate.
Preferably, the clamping mechanism comprises two connecting plates, a second spring, two clamping rods and two pressing rods, wherein the two connecting plates are symmetrically located in the inserting rods, the second spring is transversely located between the two connecting plates, two ends of the second spring are fixedly connected with two side faces of the connecting plates respectively, the two clamping rods are fixedly arranged on two sides of the connecting plates, which are away from each other, the two clamping rods are far away from one ends of the connecting plates and all penetrate through the outside of the inserting rods, clamping grooves matched with the clamping rods are formed in the inner side walls of the insertion holes, the two pressing rods are fixedly arranged on two sides of the connecting plates, which are away from each other, and one ends of the two pressing rods, which are far away from the connecting plates, extend to the outside of the inserting rods.
Preferably, the two pressing rods are located between the liquid storage barrel and the fixing plate, and the tail ends of the pressing rods are round end faces.
Preferably, a round platform hole is formed in the bottom of the liquid storage barrel, and the round platform hole is matched with the outer wall of the positioning cone.
Preferably, the side wall of the liquid storage cylinder is provided with an ink adding port, and a rubber plug is fixedly arranged in the ink adding port.
(III) beneficial effects
Compared with the prior art, the invention provides a rivet hole positioning structure for each layer of a multilayer circuit board, which has the following beneficial effects:
1. this multilayer circuit board's each layer rivet hole location structure through four liquid storage section of thick bamboo and four locating cones that set up on the fixed plate surface, first locating cone on the fixed plate sets up down for four locating cones and circuit board's surface contact, at the in-process of pushing down, the locating cone is by extrusion removal, make the locating cone remove towards the inside of liquid storage section of thick bamboo, thereby can discharge the inside ink of liquid storage section of thick bamboo and flow the ink mark at the surface of multilayer circuit board, the quick location to the multilayer circuit board has been accomplished this moment, wait that locating cone and multilayer circuit board separate, first spring gives the locating cone and applys elasticity this moment, make the locating cone stop discharging with the bottom shutoff of liquid storage section of thick bamboo.
2. This multilayer circuit board's each layer rivet hole location structure through solid fixed ring, screw rod, locating plate and the rocking handle that is equipped with, rotates the rocking handle and makes the screw rod rotatory, promotes the locating plate and removes when the screw rod is rotatory to can adjust the distance of four locating plates, make locating plate and multilayer circuit board's size match, and then can be with the accurate and locating cone contact of multilayer circuit board, improved the efficiency of location.
3. This multilayer circuit board's each layer rivet hole location structure, through connecting plate, second spring, clamping lever and the pressing rod that is equipped with, when need adjust the position of the locating cone on the liquid storage cylinder, the pressing rod of both sides is pressed to the hand for two connecting plates remove and compress the second spring, drive the inside that two clamping levers retract to the inserted bar simultaneously, can take out the inserted bar from the inside of jack this moment, thereby can adjust the position of the locating cone on the liquid storage cylinder, and then can fix a position the multilayer circuit board of equidimension.
Drawings
Fig. 1 is a schematic structural diagram of a positioning structure of rivet holes of each layer of a multilayer circuit board according to the present invention;
FIG. 2 is a schematic view of the connection between the fixing plate and the liquid storage barrel in FIG. 1;
FIG. 3 is an enlarged view of the portion A of FIG. 2;
fig. 4 is a schematic structural view of the positioning plate in fig. 1.
In the figure: 1 fixed plate, 2 jack, 3 inserted link, 4 stock solution section of thick bamboo, 5 locating cone, 6 movable plate, 7 slide bar, 8 dog, 9 first springs, 10 solid fixed ring, 11 screw rods, 12 locating plate, 13 rocking handle, 14 connecting plate, 15 second springs, 16 clamping rod, 17 press pole, 18 rubber buffer.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-4, a positioning structure for rivet holes of layers of a multilayer circuit board comprises a fixing plate 1, wherein positioning mechanisms are arranged around the surface of the fixing plate 1; the surface of fixed plate 1 has seted up a plurality of evenly distributed's jack 2, the surface of fixed plate 1 is equipped with four inserted bars 3 that are the rectangle and distribute, four inserted bars 3 insert respectively in the inside of four jacks 2, the inside of inserted bars 3 is equipped with the joint mechanism that sets up with jack 2 lateral wall joint, the tip of four inserted bars 3 is all fixed and is equipped with reservoir 4, the bottom of four reservoir 4 all is equipped with locating cone 5, one side of locating cone 5 extends to the inside of reservoir 4, locating cone 5 is located the fixed movable plate 6 that is equipped with in one side of reservoir 4, the bottom inner wall symmetry of reservoir 4 is fixed and is equipped with two slide bars 7, the both sides of movable plate 6 respectively with the wall sliding connection of two slide bars 7, the upper end of two slide bars 7 is all fixed and is equipped with dog 8, the wall of two slide bars 7 all overlaps and is equipped with first spring 9, and the both ends of first spring 9 respectively with dog 8 and movable plate 6 fixed connection, the inside of reservoir 4 is equipped with ink, when being pushed and removed, make locating cone 5 move towards the inside of reservoir 4, thereby can be with the inside reservoir 4 and the multilayer line of reservoir has finished the multilayer line quick to the multilayer line of ink discharge.
The positioning mechanism comprises a fixed ring 10, a screw rod 11, a positioning plate 12 and a rocking handle 13, wherein the fixed ring 10 is fixedly arranged on the surface of the fixed plate 1, internal threads are arranged in the fixed ring 10, the rod wall threads of the screw rod 11 are arranged in the fixed ring 10, one end of the screw rod 11 is rotationally connected with the side surface of the positioning plate 12, and the other end of the screw rod 11 is fixedly connected with the rocking handle 13; the side surface of the positioning plate 12 is fixedly embedded with a bearing, and one end of the screw 11 is rotationally connected with the side surface of the positioning plate 12 through the bearing; the locating plate 12 adopts the wedge plate, and the inclined plane of locating plate 12 is kept away from one side setting of fixed plate 1, rotates rocking handle 13 and makes screw rod 11 rotatory, promotes locating plate 12 removal when screw rod 11 is rotatory to can adjust the distance of four locating plates 12, make locating plate 12 and the size of multilayer circuit board match.
The clamping mechanism comprises two connecting plates 14, a second spring 15, two clamping rods 16 and two pressing rods 17, wherein the two connecting plates 14 are symmetrically located in the inserting rod 3, the second spring 15 is transversely located between the two connecting plates 14, two ends of the second spring 15 are fixedly connected with the side faces of the two connecting plates 14 respectively, the two clamping rods 16 are fixedly arranged on one sides of the two connecting plates 14, which are opposite to each other, one ends of the two clamping rods 16, which are far away from the connecting plates 14, penetrate through the outside of the inserting rod 3, clamping grooves matched with the clamping rods 16 are formed in the inner side walls of the inserting holes 2, the two pressing rods 17 are fixedly arranged on one sides, which are opposite to each other, of the two connecting plates 14, one ends of the two pressing rods 17, which are far away from the connecting plates 14, are all extended to the outside of the inserting rod 3, the two pressing rods 17 are located between the liquid storage barrel 4 and the fixed plate 1, the two pressing rods 17 are in round end faces, the two connecting plates 14 are pressed, the two clamping rods 16 are enabled to move and compress the second spring 15 to be driven to retract into the inside of the inserting rod 3, and the inserting rod 3 can be pulled out of the inserting hole 3.
The bottom of the liquid storage cylinder 4 is provided with a round platform hole, the round platform hole is matched with the outer wall of the positioning cone 5, the side wall of the liquid storage cylinder 4 is provided with an ink adding port, the inside of the ink adding port is fixedly provided with a rubber plug 18, and after the ink in the liquid storage cylinder 4 is used up, the rubber plug 18 can be opened to add the ink into the liquid storage cylinder 4.
To sum up, this multilayer circuit board's each layer rivet hole location structure, when using, rotate rocking handle 13 at first and make screw rod 11 rotatory, promote locating plate 12 when screw rod 11 rotates and remove, thereby can adjust the distance of four locating plates 12, make locating plate 12 and multilayer circuit board's size match, can be with the accurate and locating cone 5 contact of multilayer circuit board, then the pressing rod 17 of both sides is pressed to the hand, make two connecting plates 14 remove and compress second spring 15, drive simultaneously two clamping bars 16 retract to the inside of inserted bar 3, can take out the inside of jack at this moment, thereby can adjust the position of locating cone 5 on the reservoir cartridge 4, make inserted bar 3 insert the inside at jack 2 of different positions, and then can fix a position the multilayer circuit board of equidimension, finally set up fixed plate 1 downwards, make four locating cones 5 and circuit board's surface contact, in the in-process of pushing down, then the pressing rod 17 is pressed to remove, make locating cone 5 remove towards the inside of reservoir cartridge 4, thereby can be with reservoir cartridge 4 inside and take out the ink cone 5 at this moment, the time, the ink cone 9 is stopped to the multilayer circuit board, the ink cone is discharged to the inside of reservoir cartridge 4, the ink cone is discharged at this moment, the multilayer circuit board is stopped at the time, the ink cone 5 is discharged to the surface of the multilayer circuit board, the ink cone 5 is stopped at the time, the bottom 9 is stopped, the multilayer circuit board is positioned at this time, the ink cone 5 is kept down, and is positioned at the surface of ink cone 5, and is kept down and is pressed down by the face down.
It should be noted that the term "comprises," "comprising," or any other variation thereof is intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. Each layer rivet hole location structure of multilayer circuit board, including fixed plate (1), its characterized in that: positioning mechanisms are arranged around the surface of the fixed plate (1); the surface of the fixed plate (1) is provided with a plurality of evenly distributed jacks (2), the surface of the fixed plate (1) is provided with four inserting rods (3) which are in rectangular distribution, the four inserting rods (3) are respectively inserted into the four inserting rods (2), the inside of each inserting rod (3) is provided with a clamping mechanism which is clamped with the side wall of each inserting rod (2), the end parts of the four inserting rods (3) are fixedly provided with liquid storage cylinders (4), the bottoms of the four liquid storage cylinders (4) are respectively provided with a positioning cone (5), one side of each positioning cone (5) extends to the inside of each liquid storage cylinder (4), one side of each positioning cone (5) is fixedly provided with a movable plate (6), the inner walls of the bottoms of the liquid storage cylinders (4) are symmetrically and fixedly provided with two sliding rods (7), two sides of each movable plate (6) are respectively connected with the rod walls of the two sliding rods (7) in a sliding mode, the upper ends of the two sliding rods (7) are fixedly provided with stop blocks (8), one side of each sliding rod (7) is provided with one spring (9), and the other side of each spring (9) is respectively provided with one end of each sliding rod (9) which is fixedly provided with one spring (9) respectively;
the positioning mechanism comprises a fixed ring (10), a screw rod (11), a positioning plate (12) and a rocking handle (13), wherein the fixed ring (10) is fixedly arranged on the surface of the fixed plate (1), an internal thread is arranged in the fixed ring (10), a rod wall thread of the screw rod (11) is arranged in the fixed ring (10), one end of the screw rod (11) is rotationally connected with the side surface of the positioning plate (12), and the other end of the screw rod (11) is fixedly connected with the rocking handle (13);
the clamping mechanism comprises two connecting plates (14), a second spring (15), two clamping rods (16) and two pressing rods (17), wherein the two connecting plates (14) are symmetrically located inside the inserting rods (3), the second spring (15) is transversely located between the two connecting plates (14), two ends of the second spring (15) are fixedly connected with two side faces of the connecting plates (14) respectively, the two clamping rods (16) are fixedly arranged on two sides, deviating from the connecting plates (14), of the connecting plates respectively, one ends, deviating from the connecting plates (14), of the clamping rods (16) are penetrated to the outside of the inserting rods (3), clamping grooves matched with the clamping rods (16) are formed in the inner side walls of the inserting holes (2), the two pressing rods (17) are fixedly arranged on two sides, deviating from the connecting plates (14), and one ends, deviating from the connecting plates (14), of the pressing rods (17) are extended to the outside of the inserting rods (3) respectively.
2. The multi-layered circuit board of claim 1, wherein each layer of rivet holes is positioned by: the side of the locating plate (12) is fixedly embedded with a bearing, and one end of the screw rod (11) is rotatably connected with the side of the locating plate (12) through the bearing.
3. The multi-layered circuit board of claim 1, wherein each layer of rivet holes is positioned by: the positioning plate (12) is a wedge-shaped plate, and the inclined surface of the positioning plate (12) is far away from one side of the fixed plate (1).
4. The multi-layered circuit board of claim 1, wherein each layer of rivet holes is positioned by: the two pressing rods (17) are positioned between the liquid storage barrel (4) and the fixed plate (1), and the tail ends of the pressing rods (17) are round end faces.
5. The multi-layered circuit board of claim 1, wherein each layer of rivet holes is positioned by: the bottom of the liquid storage cylinder (4) is provided with a round platform hole which is matched with the outer wall of the positioning cone (5).
6. The multi-layered circuit board of claim 1, wherein each layer of rivet holes is positioned by: the side wall of the liquid storage cylinder (4) is provided with an ink adding port, and a rubber plug (18) is fixedly arranged in the ink adding port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210661455.2A CN114900999B (en) | 2022-06-13 | 2022-06-13 | Positioning structure for rivet holes of each layer of multilayer circuit board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210661455.2A CN114900999B (en) | 2022-06-13 | 2022-06-13 | Positioning structure for rivet holes of each layer of multilayer circuit board |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114900999A CN114900999A (en) | 2022-08-12 |
| CN114900999B true CN114900999B (en) | 2023-08-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210661455.2A Active CN114900999B (en) | 2022-06-13 | 2022-06-13 | Positioning structure for rivet holes of each layer of multilayer circuit board |
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| Country | Link |
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| CN (1) | CN114900999B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB155647A (en) * | 1919-09-23 | 1920-12-23 | Skerrett Garratt | Improved combination gauging tool |
| US4688328A (en) * | 1985-12-20 | 1987-08-25 | Rca Corporation | Method for fabricating a printed circuit board assembly and method for the manufacture thereof |
| JP2010247315A (en) * | 2009-04-10 | 2010-11-04 | Makoto Okamura | Positioning tool for perforation |
| CN102239021A (en) * | 2008-12-02 | 2011-11-09 | 奥西-技术有限公司 | Device for ejecting droplets of a fluid having a high temperature |
| CN105228356A (en) * | 2015-11-05 | 2016-01-06 | 中国电子科技集团公司第四十五研究所 | Printing positioning mechanism for circuit boards with various dimensions and specifications and use method thereof |
| CN108274415A (en) * | 2018-04-16 | 2018-07-13 | 长兴华通耐火材料厂 | A kind of refractory material processing fixing device |
-
2022
- 2022-06-13 CN CN202210661455.2A patent/CN114900999B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB155647A (en) * | 1919-09-23 | 1920-12-23 | Skerrett Garratt | Improved combination gauging tool |
| US4688328A (en) * | 1985-12-20 | 1987-08-25 | Rca Corporation | Method for fabricating a printed circuit board assembly and method for the manufacture thereof |
| CN102239021A (en) * | 2008-12-02 | 2011-11-09 | 奥西-技术有限公司 | Device for ejecting droplets of a fluid having a high temperature |
| JP2010247315A (en) * | 2009-04-10 | 2010-11-04 | Makoto Okamura | Positioning tool for perforation |
| CN105228356A (en) * | 2015-11-05 | 2016-01-06 | 中国电子科技集团公司第四十五研究所 | Printing positioning mechanism for circuit boards with various dimensions and specifications and use method thereof |
| CN108274415A (en) * | 2018-04-16 | 2018-07-13 | 长兴华通耐火材料厂 | A kind of refractory material processing fixing device |
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| Publication number | Publication date |
|---|---|
| CN114900999A (en) | 2022-08-12 |
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