CN114040582A - Circuit printing forming equipment and method for keyboard circuit film - Google Patents
Circuit printing forming equipment and method for keyboard circuit film Download PDFInfo
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- CN114040582A CN114040582A CN202111332269.6A CN202111332269A CN114040582A CN 114040582 A CN114040582 A CN 114040582A CN 202111332269 A CN202111332269 A CN 202111332269A CN 114040582 A CN114040582 A CN 114040582A
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- circuit
- drying
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- gap bridge
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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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
- H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
- H01H13/88—Processes specially adapted for manufacture of rectilinearly movable switches having a plurality of operating members associated with different sets of contacts, e.g. keyboards
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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
- H05K3/0011—Working of insulating substrates or insulating layers
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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
- H05K3/10—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern
- H05K3/12—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern using thick film techniques, e.g. printing techniques to apply the conductive material or similar techniques for applying conductive paste or ink patterns
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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
- H05K3/10—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern
- H05K3/12—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern using thick film techniques, e.g. printing techniques to apply the conductive material or similar techniques for applying conductive paste or ink patterns
- H05K3/1283—After-treatment of the printed patterns, e.g. sintering or curing methods
- H05K3/1291—Firing or sintering at relative high temperatures for patterns on inorganic boards, e.g. co-firing of circuits on green ceramic sheets
Abstract
The utility model relates to a circuit printing forming device and method of a keyboard circuit film, which relates to the technical field of the production of the keyboard circuit film, wherein the device comprises a winding feeding mechanism, a primary preliminary drying mechanism, a gap bridge insulating layer printing mechanism, a secondary preliminary drying mechanism, a gap bridge circuit silver paste printing mechanism and a drying collecting mechanism, and also comprises a plurality of transfer grooves, wherein the transfer grooves are arranged between the bottom layer circuit silver paste printing mechanism and each mechanism of the gap bridge circuit printing mechanism and used for collecting output semi-finished products; the method comprises the step of simultaneously completing the printing and forming of the double-inner-face bottom layer circuit and the bridge-crossing circuit of the keyboard circuit film in one roll-to-roll transmission by using forming equipment. This application has the advantage that can accomplish the circuit printing in a roll-to-roll transmission simultaneously in order to improve keyboard circuit film production efficiency.
Description
Technical Field
The application relates to the technical field of keyboard production, in particular to a circuit printing forming device and method for a keyboard circuit film.
Background
The keyboard is a medium for inputting information between human and computer, and belongs to the important part of computer system. The keyboard comprises a contact electrode for key transmission and a circuit structure for connecting the electrode. With the development of technology, the circuit structure is usually a thin film circuit structure.
The related technology is disclosed in patent application with publication number CN102946697A, and discloses a method for manufacturing a thin film circuit board, which comprises the following steps: providing a first circuit diaphragm, an insulating diaphragm and a second circuit diaphragm; and using a hot melting combination process to fuse and attach the insulating membrane to the first circuit membrane and the second circuit membrane, and using a punching blanking process to form a plurality of structural assembly holes to form the thin film circuit board.
With respect to the above-described related art, the inventors consider that the following drawbacks exist: the circuit diaphragm is provided with the bridge circuit, so that the thin film circuit needs to be formed through a plurality of processes, semi-finished products generated in each process need to be transferred in a production line changing mode between the processes, and the circuit diaphragm is low in production efficiency due to the fact that alignment operation exists.
Disclosure of Invention
In order to solve the problem that the production efficiency is low because the circuit film needs to be transferred and aligned between the working procedures at present, the application provides the circuit printing forming equipment and the circuit printing forming method for the keyboard circuit film.
In a first aspect, the present application provides a circuit printing forming apparatus for a keyboard circuit film, which adopts the following technical scheme:
a circuit printing forming device of a keyboard circuit film comprises:
the winding tape feeding mechanism is used for providing a winding tape type blank film;
the bottom layer circuit silver paste printing mechanism is connected with the winding tape feeding mechanism and is used for printing bottom layer circuit silver paste on the blank film;
the primary drying mechanism is connected with the bottom layer circuit silver paste printing mechanism, so that silver paste does not flow to form double inner face bottom layer circuits of the keyboard circuit film;
the gap bridge insulating layer printing mechanism is connected with the bottom layer circuit silver paste printing mechanism and is used for printing the insulating paste on the blank film;
the secondary primary drying mechanism is connected with the gap bridge insulating layer printing mechanism, so that the isolation paste does not flow to form a gap bridge insulating layer;
the gap bridge circuit silver paste printing mechanism is connected with the secondary primary drying mechanism and is used for printing the silver paste of the gap bridge circuit on the gap bridge insulating layer;
the drying and collecting mechanism is connected with the gap bridge circuit silver paste printing mechanism and is used for completely curing the silver paste circuit, the gap bridge insulating layer and the gap bridge circuit, the drying and collecting mechanism comprises an oven, a drying chamber is formed inside the oven, a winding belt receiving mechanism is arranged in the middle of the oven, and the winding belt is conveyed in the drying chamber (412) in a winding manner;
the equipment further comprises a plurality of transfer grooves, and the transfer grooves are formed in the bottom layer circuit silver paste printing mechanism to the gap bridge circuit printing mechanisms and used for collecting output semi-finished products.
Through adopting above-mentioned technical scheme, winding feed mechanism provides the blank film of single winding, and when blank film passed through bottom circuit silver thick liquid printing mechanism, silver thick liquid circuit on blank film printing to carry out the preliminary drying of one-level and make the silver thick liquid not flow and become the two inner face bottom circuit of keyboard circuit film, in order to form one-level semi-manufactured goods.
And then the gap bridge insulating layer printing mechanism prints isolation paste on a gap bridge area of the primary semi-finished product, and secondary primary drying is carried out to prevent the isolation paste from flowing to form a gap bridge insulating layer so as to form a secondary semi-finished product.
And then, the silver paste printing mechanism of the bottom layer circuit prints silver paste on the gap bridge insulating layer to form a gap bridge circuit so as to form a three-stage semi-finished product. And (4) the semi-finished product enters a drying chamber in the oven to be dried in a centralized manner, so that the circuit is completely cured, and then the semi-finished product is rolled. The transfer tank can temporarily collect the semi-finished products accumulated among the mechanisms. Because the alignment operation does not exist, the equipment can simultaneously complete the printing and forming of the bottom layer circuit, the gap bridge insulating layer and the gap bridge circuit of the double inner surfaces of the keyboard circuit film in one roll-to-roll transmission, the production efficiency is improved, and the printing quality of the film circuit is improved.
Optionally, a sensing unit is installed on the transfer tank and used for sensing the stock of the semi-finished products and feeding back signals to corresponding upper and lower processes, and the bottom layer circuit silver paste printing mechanism and/or the gap bridge insulating layer printing mechanism and the gap bridge circuit printing mechanism can adjust respective transmission rates after receiving the signal feedback of the sensing unit.
By adopting the technical scheme, the printing speed of each process is independent, and the semi-finished product stock sensed by the sensing unit is fed back to the upper and lower processes, so that the transmission rate of each process can be adjusted in real time.
Optionally, a channel for communicating the drying chamber with the outside is formed in the side wall of the oven; the drying and collecting mechanism further comprises:
the drying assembly is arranged in the drying chamber, and a hot air outlet communicated with the drying assembly is formed in the inner wall of the drying chamber of the drying oven;
the winding belt material receiving assembly comprises a material receiving roller and a motor, wherein the material receiving roller is rotatably arranged in the middle of the side wall of the drying chamber, and the motor drives the material receiving roller to rotate;
and at least two turning rollers are arranged around the material receiving roller and are used for sequentially winding the film after entering the drying chamber from the channel to form a paper-back inner-winding path and winding the film on the material receiving roller.
Through adopting above-mentioned technical scheme, semi-manufactured goods enter into the inside drying chamber of oven through the passageway, and semi-manufactured goods turns to around establishing the back winding on receiving the material roller through the steering roll, and drying assembly blows hot-blastly to the drying chamber through hot air outlet, concentrates the drying to semi-manufactured goods, shortens drying process area, improves unit production area's drying efficiency.
Optionally, the drying and collecting mechanism further comprises two tension rollers which are arranged side by side; preferably, the height of one of the turning rolls is the same as the channel height; or/and the tension roller is rotatably arranged below the channel of the oven.
Through adopting above-mentioned technical scheme, the tensioning roller makes film winding inseparable in the rolling operation, reduces the possibility that the film pine takes off, improves the rolling quality. The film winds the turning rollers arranged at the same height when entering from the channel, so that the possibility of contact scratch of the film and the inner wall of the oven is reduced, and the product quality is improved. The tensioning roller is located below the channel, so that the film is conveyed in a shape like a Chinese character 'hui' when wound, the drying path of unit production distance is prolonged, and the drying effect is improved.
Optionally, a transition roller which is horizontally and rotatably arranged is arranged on the outer wall of the oven at the channel; preferably, the height of the transition roller is between the highest point and the height of the upper and lower side walls of the channel.
By adopting the technical scheme, the semi-finished film passes through the transition roller before entering the oven, so that the possibility of contact between the semi-finished film and the inner wall of the channel is reduced, the probability of scratching the film is reduced, and the production quality is improved.
Optionally, the drying device further comprises a detection mechanism, which is arranged in the drying chamber and is used for detecting the dryness of the film; specifically, the detection mechanism comprises a detection probe and a display, the detection probe is fixed on the inner wall of the oven and provided with a detection port for a thin film to pass through; the detection probe is electrically connected with the display.
By adopting the technical scheme, the detection mechanism detects the dryness of the film, thereby being beneficial to controlling the product quality.
After the detection probe detects data, the data can be displayed on a display so as to be visually observed, and therefore the temperature or the wind speed of the drying assembly can be regulated and controlled.
Optionally, a support assembly is mounted on the bottom wall of the drying chamber of the oven, and the support assembly can lift the film away from the side wall of the drying chamber.
Through adopting above-mentioned technical scheme, on the one hand has further increased transmission path, and on the other hand makes the film of supporting component both sides correspond two hot air outlet in below, strengthens the drying before the rolling.
Optionally, the support assembly includes:
the support is fixed on the bottom wall of the drying chamber;
and the supporting roller is horizontally and rotatably supported on the support, and the rotating axis of the supporting roller is perpendicular to the film transmission direction.
Through adopting above-mentioned technical scheme, the backing roll supports the film for the film that is close to the drying chamber bottom wall is also in the tensioning state.
In a second aspect, the present application provides a method for printing a circuit of a keyboard circuit film, which adopts the following technical solution:
the circuit printing forming method of the keyboard circuit film uses the circuit printing forming equipment of the keyboard circuit film to simultaneously complete the printing forming of double inner-face bottom layer circuits, a bridging insulating layer and a bridging circuit of the keyboard circuit film in one roll-to-roll transmission.
By adopting the technical scheme, the time wasted in alignment operation among the working procedures is reduced, and the production efficiency is improved.
In a third aspect, the present application provides a method for printing and forming a circuit of a keyboard circuit film, which adopts the following technical scheme:
a circuit printing forming method of a keyboard circuit film comprises the following steps:
printing silver paste on the blank film after dust removal, and performing primary drying to prevent the silver paste from flowing to form double inner-face bottom layer lines of the keyboard circuit film so as to form a primary semi-finished product; the primary semi-finished product transmission rate is v 1;
printing isolation paste on the gap bridge area of the primary semi-finished product, and performing secondary primary drying to prevent the isolation paste from flowing to form a gap bridge insulating layer so as to form a secondary semi-finished product; the transmission speed of the secondary semi-finished product is v 2;
printing silver paste on the gap bridge insulating layer to form a gap bridge circuit so as to form a three-stage semi-finished product; the transmission rate of the tertiary semi-finished product is v 3; wherein, semi-finished product stock areas are arranged among all stages of semi-finished products, the semi-finished product stock among all stages of semi-finished products is sensed and signals are fed back to corresponding upper and lower stages of processes so as to individually adjust the transmission rates of v1, v2 and v 3;
carrying out centralized drying of the winding inner roll on the circuit film to completely solidify the bottom layer circuit, the gap bridge insulating layer and the gap bridge circuit, and winding the dried circuit film by the winding belt material receiving assembly;
wherein the primary semi-finished product, the secondary semi-finished product and the tertiary semi-finished product are integrated into a single winding belt;
preferably, the detection mechanism is right after the film is detected, the signal is fed back to the drying assembly and/or the winding belt material receiving assembly, the drying assembly adjusts the drying temperature and the wind speed after receiving the feedback signal, and the winding belt material receiving assembly adjusts the winding speed after receiving the feedback signal.
By adopting the technical scheme, the double-inner-face bottom layer circuit, the gap bridge insulating layer and the gap bridge circuit of the keyboard circuit film are printed and formed simultaneously in one roll-to-roll transmission, so that delay caused by alignment of the gap bridge circuit switched among different winding production lines during the manufacturing of the keyboard circuit film is avoided. In addition, each process can adjust the production rate in real time according to the semi-finished product stock feedback of the adjacent process, and the whole printing efficiency is improved. Concentrated drying greatly shortens equipment production line occupation of land distance, has solved the equipment of winding production line overlength and has set up the difficult problem.
In summary, the present application includes at least one of the following beneficial technical effects: the printing and forming of the double inner-face bottom layer circuit and the bridge-crossing circuit of the keyboard circuit film are completed simultaneously in one roll-to-roll transmission; the production rate between each process is fed back in a coordinated manner, and the whole printing efficiency is improved.
Drawings
FIG. 1 is a schematic structural diagram of a circuit printing and forming apparatus for a keyboard circuit film according to an embodiment of the present application;
FIG. 2 is a schematic structural view of a transfer tank;
FIG. 3 is a schematic view of the overall structure of the drying and collecting mechanism;
FIG. 4 is a cross-sectional view showing a drying path of the film at the plane A-A in FIG. 3;
FIG. 5 is an enlarged view of a portion B of FIG. 3 showing the structure of the detecting mechanism;
fig. 6 is a flowchart of a method for printing a circuit of a keyboard circuit film according to an embodiment of the present application.
Description of reference numerals:
1. a bridge insulating layer printing mechanism;
2. a bottom layer circuit silver paste printing mechanism;
3. a bridge circuit silver paste printing mechanism;
4. a drying and collecting mechanism; 41. an oven; 411. a channel; 412. a drying chamber; 42. a transition component; 421. a support; 422. a shutter; 423. a transition roll; 43. a hot air outlet; 44. a turning roll; 45. a support assembly; 451. a support; 452. a support roller; 46. a tension roller; 47. a material receiving roller;
5. a detection mechanism; 51. a mounting frame; 52. detecting a probe; 53. a display;
6. a transit trough; 61. a collecting hopper; 611. air holes are formed; 612. grooving; 613. a handle; 62. a sensor; 63. a support leg;
7. a drying mechanism;
8. a tape feeding mechanism;
9. a circuit diaphragm;
s1, removing dust of the blank membrane; s2, printing a silver paste circuit; s3, primary drying; s31, sensing the first-stage semi-finished product stock; s4, printing isolation paste; s5, secondary primary drying; s51, sensing the stock of the secondary semi-finished product; s6, printing a bridge circuit; s61, detecting the dryness; and S7, concentrated drying and rolling.
Detailed Description
The present application is described in further detail below with reference to figures 1-6.
The embodiment of the application discloses a circuit printing forming device and method of a keyboard circuit film.
Referring to fig. 1, the circuit printing former of keyboard circuit film includes winding feed mechanism 8 and dry collection mechanism 4, blank film book is placed in winding feed mechanism 8, bottom circuit silver thick liquid printing mechanism 2 has set gradually between winding feed mechanism 8 to dry collection mechanism 4, gap bridge insulating layer printing mechanism 1 and gap bridge circuit silver thick liquid printing mechanism 3, gap bridge insulating layer printing mechanism 1 is provided with transfer groove 6 respectively with between bottom circuit silver thick liquid printing mechanism 2 and the gap bridge circuit silver thick liquid printing mechanism 3, bottom circuit silver thick liquid printing mechanism 2 and gap bridge insulating layer printing mechanism 1's discharge end all is provided with drying mechanism 7. Blank diaphragm is by printing silver thick liquid when through bottom circuit silver thick liquid printing mechanism 2 to carry out one-level preliminary drying and make the silver thick liquid not flow and become the two inner face bottom circuit of keyboard circuit film, then separate the thick liquid through bridge insulating layer printing mechanism 1 on the regional printing of gap bridge, and carry out the preliminary drying of second grade and make it the separate thick liquid not flow and become the gap bridge insulating layer, form the gap bridge circuit through 3 printing silver thick liquid of bridge circuit silver thick liquid printing mechanism again, through transfer 6 transfer in the transfer groove between two adjacent processes, then semi-manufactured goods carry dry collection mechanism 4 to concentrate and carry out the drying and collect, and the semi-manufactured goods of each process constitutes in single winding as an organic whole, has reduced the process and has shifted the counterpoint operation, improves production efficiency.
Referring to fig. 1, the winding tape feeding mechanism 8 includes a feeding roller rotatably disposed, and a dust removing member may be disposed between the feeding roller and the bottom layer circuit silver paste printing mechanism 2, where the dust removing member employs an electrostatic dust removing roller.
The bottom layer circuit silver paste printing mechanism 2 and the gap bridge circuit silver paste printing mechanism 3 can adopt the same equipment. If three-stage drying is carried out after the gap bridge circuit silver paste printing mechanism 3, a transfer groove 6 can also be arranged between the drying mechanism 7 and the gap bridge circuit silver paste printing mechanism 3. If the three-stage drying is not carried out, the drying and collecting mechanism 4 is directly entered.
The drying mechanism 7 can be a hot air blower or an infrared bolometer, and can also be a fan because of only preliminary drying. The infrared thermal radiation instrument is fixedly connected with the bottom layer circuit silver paste printing mechanism 2 and the gap bridge insulating layer printing mechanism 1 through bolts.
In another embodiment of the present embodiment, the drying mechanism 7 may be provided independently, and in this case, the relay groove 6 is also provided between the drying mechanism 7 and the adjacent mechanism.
Referring to fig. 2, the transfer tank 6 includes a collecting bucket 61 and a sensor 62 installed on the collecting bucket 61, the collecting bucket 61 is integrally in a quadrangular frustum pyramid structure with an open top surface and a hollow interior, and the open side of the collecting bucket 61 is a large end. One side wall of the collecting hopper 61 arranged along the length direction is provided with a penetrating air hole 611, the air hole 611 is a strip-shaped hole, the number of the air holes 611 can be two, and the two air holes 611 extend from the opening end close to the collecting hopper 61 to the bottom wall and are arranged in parallel.
The sensor 62 is installed inside the opposite side walls of the ventilation hole 611 of the transfer chute 6, and the sensor 62 can be an infrared sensor or a pressure sensor for detecting the speed of the circuit membrane 9 transferring the material into the collection hopper 61. The sensor 62 is electrically connected to an external control computer.
In order to facilitate the observation of the material storage condition in the transfer slot 6, trapezoidal slots 612 are formed on two adjacent side walls of the transfer slot 6, which are located on the air holes 611 and close to the open end. The diapire of transfer groove 6 is fixed with four stabilizer blades 63 through the bolt, and this place stabilizer blade 63 distributes in transfer groove 6 diapire four corners position for adjust the level of transfer groove 6. The supporting legs 63 are provided with pressure sensors, and the pressure sensors are electrically connected with an external control computer. A handle 613 is fixed on the outer side of the side wall of the middle rotating groove 6 where the open groove 612 is located, so that the position of the middle rotating groove 6 can be conveniently and manually transferred.
The transfer groove 6 is located and outwards extends to form a skirt edge around the opening, and the transfer groove 6 is arranged corresponding to a round angle at the bending part of the skirt edge, so that the possibility of contact scratch of the circuit diaphragm 9 is reduced when the circuit diaphragm enters and leaves the transfer groove 6.
Referring to fig. 3 and 4, the drying and collecting mechanism 4 includes an oven 41, and a drying assembly and a web receiving assembly installed in the oven 41. The side wall of the oven 41 is provided with a channel 411 for the circuit diaphragm 9 to pass through, the channel 411 is a rectangular channel, the height of the channel 411 is 5-15mm, and the width of the channel 411 is not less than the width of the circuit diaphragm 9. The drying chamber 412 is formed in the hollow inside of the oven 41, the drying assembly dries the circuit membrane 9 by utilizing heat radiation or hot air blowing to the drying chamber 412, and the dried circuit membrane 9 is collected by the winding and receiving assembly.
The channel 411 is preferably provided on the upper side of the oven 41 so that the circuit membrane 9 is rolled in from the upper edge of the "return" shape when entering the oven 41, which increases the horizontal baking time. In order to reduce the possibility of scratching of the circuit membrane 9 when the circuit membrane enters the oven 41, a transition assembly 42 is installed on the outer wall of the oven 41 at the position of the channel 411, the transition assembly 42 comprises brackets 421 fixed on the two horizontal sides of the channel 411, the brackets 421 and the oven 41 can be fixed through bolts, and the brackets 421 are triangular brackets to improve the stability of the transition assembly 42; a transition roller 423 is horizontally and rotatably connected between the two brackets 421, and the length of the transition roller 423 is larger than the width of the channel 411, so that the possibility of the bracket 421 generating extrusion abrasion on the circuit diaphragm 9 is reduced. The highest point of the transition roller 423 is at the same level with the height center line of the channel 411, and there may be some deviation in actual installation, but the circuit film 9 does not contact with the side wall of the channel 411 when the circuit film 9 is controlled to enter the channel 411 by bypassing the transition roller 423.
A louver 422 is fixed between the outer wall of the oven 41 and the two supports 421, and the louver 422 is disposed obliquely downward. A slit is formed between the shutter 422 and the transition roller 423, and the circuit film 9 passes through the slit.
Referring to fig. 4, the drying assembly includes a drying member, which may be a hot air blower, installed in the oven 41. The side wall of the oven 41 located in the drying chamber 412 is provided with a hot air outlet 43 communicated with the drying piece, and the hot air outlet 43 is used for directionally blowing the hot air generated by the drying assembly to the drying chamber 412. The drying piece is electrically connected with an external control computer.
The winding and receiving assembly comprises a receiving roller 47 and a motor driving the receiving roller 47 to rotate, and the motor is installed in the oven 41. The motor is electrically connected with an external control computer.
Because the space of the drying chamber 412 of the oven 41 is limited, in order to dry the circuit film 9 before winding, the drying chamber 412 is designed into a rectangular cavity, and one steering roller 44 is rotatably mounted at each corner of the oven 41, wherein the upper steering roller 44 and the transition roller 423 are at the same height, and the lower two steering rollers 44 are at the same height. The turning roller 44 extends the drying path of the circuit film 9, and turns in a zigzag shape in the drying chamber 412, thereby improving the drying effect. The path of the circuit membrane 9 in the drying chamber 412 may be one, two or three turns and more. Furthermore, 4 hot air outlets 43 are also arranged and distributed in a rectangular shape, so that the circuit films 9 close to different side walls of the drying chamber 412 can be dried simultaneously, and the drying efficiency is improved.
Two horizontally arranged tension rollers 46 are rotatably installed on the inner wall of the oven 41 close to the lower part of the channel 411, and the two tension rollers 46 are arranged in an abutting mode, so that the circuit diaphragm 9 is in a tension state between the tension rollers 46 and the material receiving roller 47.
Referring to fig. 4 and 5, in order to control the winding speed of the receiving roller 47 so that the circuit film 9 is completely dried before winding, the detection mechanism 5 is fixed to the bottom wall of the drying chamber 412 of the oven 41. The detection mechanism 5 comprises a mounting frame 51, a detection probe 52 and a display 53, wherein the mounting frame 51 is fixed on the oven 41 through bolts, the detection probe 52 is fixed on the mounting frame 51 through bolts, and the detection probe 52 is in a U-shaped structure so that the circuit diaphragm 9 can penetrate through the detection probe 52 for detection; the display 53 is fixed outside the oven 41, the detection probe 52 is electrically connected with the display 53, and the detection probe 52 is electrically connected with an external control computer.
In order to make the circuit film 9 pass through the detecting probe 52 smoothly, the supporting assembly 45 is installed on the bottom wall of the drying chamber 412 of the oven 41, the supporting assembly 45 comprises a support body 451 and supporting rollers 452, the support body 451 is fixed with the oven 41 through bolts, two supporting rollers 452 are arranged at the position and horizontally rotatably installed on the top of the support body 451, and the rotating axes of the supporting rollers 452 are perpendicular to the conveying direction of the circuit film 9. Due to the action of the supporting rollers 452, the circuit film 9 conveyed close to the bottom wall of the drying chamber 412 is lifted, so that the conveying path is further increased on one hand, and on the other hand, the circuit film 9 on two sides of the supporting assembly 45 correspond to the hot air outlets 43 on the two lower sides, so that the drying before winding is enhanced. Each hot air outlet 43 is independently connected to one air heater as required, so that the drying temperature and the air speed of each air heater can be independently controlled.
The oven 41 is provided with a lamp tube at the bottom wall of the drying chamber 412 for illuminating the film to facilitate observation of the state, and the lamp tube can be fixed near one side of the support 451.
In other embodiments of this application embodiment, the quantity of gap bridge insulating layer printing mechanism 1, bottom circuit silver thick liquid printing mechanism 2 can set up as required, like 2, 3 etc. gap bridge insulating layer printing mechanism 1 and bottom circuit silver thick liquid printing mechanism 2 set up in turn and all set up transfer groove 6 between the two. In other embodiments of the embodiment of the present application, a carbon paste printing mechanism may be further included, and a transfer tank 6 is also provided between the carbon paste printing mechanism and other mechanisms.
The working principle of the circuit printing forming equipment of the keyboard circuit film is as follows:
referring to fig. 6, after the blank membrane is dedusted S1, a silver paste circuit S2 is printed by the bottom layer circuit silver paste printing mechanism 2, and primary preliminary drying S3 is performed to prevent silver paste from flowing to become the bottom layer circuit of the double inner faces of the keyboard circuit film, so as to form a primary semi-finished product of the circuit membrane 9; at this point the silver paste circuit is not fully dried and cured. This procedure to achieve silver paste printing and short drying, the primary semifinished product was set at a transport rate v 1.
The primary semi-finished product passes through a bridge insulating layer printing mechanism 1, isolation paste S4 is coated on the surface of a complex area of a bottom layer circuit, the isolation paste is a UV insulating layer, and secondary primary drying S5 is carried out to prevent the isolation paste from flowing to form a bridge insulating layer, so that a secondary semi-finished product of the circuit diaphragm 9 is formed; the bridge insulating layer is not sufficiently dried and cured at this time. This procedure to achieve printing and short drying of the bridge insulation layer, the transport rate of the secondary semifinished product was set to v 2.
And (3) the second-level semi-finished product passes through the bridge circuit silver paste printing mechanism 3, and silver paste is additionally printed on the surface of a bridge insulating layer in a circuit bridge area to be used as a printed bridge circuit S6, so that a third-level semi-finished product of the circuit diaphragm 9 is formed. The printing area of the gap bridge circuit is smaller than the whole bottom layer circuit, so that the printing time can be shorter, and the gap bridge circuit can be free of independent drying treatment; the conveying speed of the three-stage semi-finished product is set to v3, v3> v 1.
When there is carbon paste printing in the entire apparatus, the transfer rate of the circuit membrane 9 in the carbon paste printing process is set to v 4.
The winding speed of the winding component is initially set to v 0.
Because the sizes of v1-v4 are different, namely the transmission speed and the residence time of the circuit diaphragm 9 in each process are different, if v2> v1, and if v3> v1 and v2> v3, a transfer groove 6 formed between a three-stage semi-finished product of the circuit diaphragm 9 and a two-stage semi-finished product of the circuit diaphragm 9 can accumulate materials, and after the sensors 62 in the transfer groove 6 detect the accumulation of the materials, signal feedback is carried out on the bridge-crossing insulating layer printing mechanism 1 for forming the two-stage semi-finished product of the circuit diaphragm 9, so that the transmission speed of the bridge-crossing insulating layer printing mechanism 1 is reduced or stopped; when the sensor 62 of the transit trough 6 detects that the material accumulation is less than the set value again, the signal is fed back to the gap bridge insulating layer printing mechanism 1 to start working.
The sensor 62 on the transfer chute 62 senses the stored material for the stock of the semi-finished product (S31, S51), and feeds back a signal to the corresponding upper-stage process and lower-stage process. The following description will be given by taking three adjacent steps as an example.
If v2> v1, the process is continued to cause tension possibly breaking of the circuit diaphragm 9 of the upper process, the process stops working, at this time, the stock of materials stored in the lower process is S0= (v2-v 3) × t0, wherein t0 is the initial working time of the process; after waiting for a period of time t1 (t1< t0), the stock level of the upper stage process in the process is S1= v1 × t1, and the stock level of the lower stage process in the process is S2= (v2-v 3) × (t0-t 1). When the working procedure is started until the next stop, the working time is t2, the transmission distance of the circuit diaphragm 9 should meet v2 t2= S1+ v1 t2, and the second starting working time t2= v1 t1/(v2-v1) = (v1/(v2-v1)) = t 1. At this time, the material stock S3= S2+ (v2-v 3) × t2 of the lower process, when S3 exceeds the design stock, the process is stopped by feeding back in advance, at this time, t2< (v1/(v2-v1)) × t1, and the dynamic feedback process is repeated in each process until the production is finished.
The detection mechanism 5 detects the drying degree of the circuit diaphragm 9 and feeds back the drying degree to the winding assembly, and when the drying degree does not meet the design requirement, the air heater is preferentially controlled to increase the temperature and the blowing speed. And if the design requirement is still not met, reducing the winding speed v 4.
The whole circuit printing process simultaneously completes the printing and forming of the double inner-face bottom layer circuit and the bridge-crossing circuit of the keyboard circuit film in one roll-to-roll transmission, the alignment operation is not needed between the working procedures, and the production efficiency and the printing quality are improved; the production rate between each process is fed back in a coordinated manner, and the whole printing efficiency is improved.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (10)
1. A circuit printing forming device of a keyboard circuit film is characterized by comprising:
a tape supply mechanism (8) for supplying a tape-like blank film;
the bottom layer circuit silver paste printing mechanism (2) is connected with the winding and feeding mechanism (8) and is used for printing bottom layer circuit silver paste on the blank film;
the primary drying mechanism (7) is connected with the bottom layer circuit silver paste printing mechanism (2) so that silver paste does not flow to form double inner face bottom layer circuits of the keyboard circuit film;
the gap bridge insulating layer printing mechanism (1) is connected with the bottom layer circuit silver paste printing mechanism (2) and is used for printing insulating paste on the blank film;
the secondary primary drying mechanism (7) is connected with the gap bridge insulating layer printing mechanism (1) so that the isolation paste does not flow to form a gap bridge insulating layer;
the gap bridge circuit silver paste printing mechanism (3) is connected with the secondary primary drying mechanism (7) and is used for printing the silver paste of the gap bridge circuit on the gap bridge insulating layer;
the drying and collecting mechanism (4) is connected with the gap bridge circuit silver paste printing mechanism (3) and is used for completely curing the silver paste circuit, the gap bridge insulating layer and the gap bridge circuit, the drying and collecting mechanism (4) comprises an oven (41), a drying chamber (412) is formed inside the oven (41), a winding belt receiving assembly is arranged in the middle of the oven (41), and the winding belt is conveyed in a zigzag inner winding manner in the drying chamber (412);
the equipment further comprises a plurality of transfer grooves (6), wherein the transfer grooves (6) are formed in the bottom layer circuit silver paste printing mechanism (2) to the gap bridge circuit printing mechanisms and used for collecting output semi-finished products.
2. The apparatus for forming a circuit pattern of a keyboard circuit film according to claim 1, wherein: and the transfer tank (6) is provided with a sensing unit for sensing the stock of the semi-finished products and feeding back signals to corresponding upper and lower working procedures, and the bottom layer circuit silver paste printing mechanism (2) and/or the gap bridge insulating layer printing mechanism (1) and the gap bridge circuit printing mechanism receive the signals fed back by the sensing unit and then can adjust the respective transmission rate.
3. The apparatus for forming a circuit pattern of a keyboard circuit film according to claim 1, wherein: a channel (411) communicated with the drying chamber (412) and the outside is formed in the side wall of the oven (41); the drying and collecting mechanism (4) further comprises:
the drying assembly is arranged in the drying chamber (412), and a hot air outlet (43) communicated with the drying assembly is formed in the inner wall, located on the drying chamber (412), of the drying oven (41);
the winding belt receiving assembly comprises a receiving roller (47) rotatably mounted in the middle of the side wall of the drying chamber (412) and a motor driving the receiving roller (47) to rotate;
and at least two turning rollers (44) are arranged around the material receiving roller (47) and are used for sequentially winding the turning rollers (44) after the film enters the drying chamber (412) from the channel (411) to form a paper-back inner winding path and winding the paper-back inner winding path on the material receiving roller (47).
4. The apparatus for forming a circuit pattern of a keyboard circuit film according to claim 3, wherein: the drying and collecting mechanism (4) further comprises two tension rollers (46), and the two tension rollers (46) are arranged side by side; preferably, the height of one of said diverting rollers (44) is the same as the height of said channel (411); or/and the tension roller (46) is rotatably arranged below the channel (411) of the oven (41).
5. The apparatus for forming a circuit pattern of a keyboard circuit film according to claim 4, wherein: a transition roller (423) which is horizontally and rotatably arranged is arranged on the outer wall of the oven (41) at the position of the channel (411); preferably, the highest point of the transition roller (423) is between the height of the upper and lower side walls of the duct (411).
6. The apparatus for forming a circuit pattern of a keyboard circuit film according to any one of claims 1 to 5, wherein: the drying device also comprises a detection mechanism (5) which is arranged in the drying chamber (412) and is used for detecting the dryness of the film; specifically, the detection mechanism (5) comprises a detection probe (52) and a display (53), the detection probe (52) is fixed on the inner wall of the oven (41), and the detection probe (52) is provided with a detection port for a thin film to pass through; the detection probe (52) is electrically connected with the display (53).
7. The apparatus for forming a circuit pattern of a keyboard circuit film according to claim 6, wherein: the oven (41) is provided with a support assembly (45) at the bottom wall of the drying chamber (412), and the support assembly (45) can lift the film away from the side wall of the drying chamber (412).
8. The apparatus for forming a circuit pattern of a keyboard circuit film according to claim 7, wherein: the support assembly (45) comprises:
a support (451) fixed to the bottom wall of the drying chamber (412);
and a support roller (452) horizontally rotatably supported on the support (451), a rotation axis of the support roller (452) being disposed perpendicular to the film transfer direction.
9. A circuit printing forming method of a keyboard circuit film is characterized in that: the circuit printing and forming equipment of the keyboard circuit film as claimed in any one of claims 1 to 8, wherein the printing and forming of the double inner-face bottom layer circuit, the bridge insulating layer and the bridge circuit of the keyboard circuit film are simultaneously completed in one roll-to-roll transmission.
10. A circuit printing forming method of a keyboard circuit film is characterized in that: the method comprises the following steps:
printing silver paste on the blank film after dust removal, and performing primary drying to prevent the silver paste from flowing to form double inner-face bottom layer lines of the keyboard circuit film so as to form a primary semi-finished product; the primary semi-finished product transmission rate is v 1;
printing isolation paste on the gap bridge area of the primary semi-finished product, and performing secondary primary drying to prevent the isolation paste from flowing to form a gap bridge insulating layer so as to form a secondary semi-finished product; the transmission speed of the secondary semi-finished product is v 2;
printing silver paste on the gap bridge insulating layer to form a gap bridge circuit so as to form a three-stage semi-finished product; the transmission rate of the tertiary semi-finished product is v 3; wherein, semi-finished product stock areas are arranged among all stages of semi-finished products, the semi-finished product stock among all stages of semi-finished products is sensed and signals are fed back to corresponding upper and lower stages of processes so as to individually adjust the transmission rates of v1, v2 and v 3;
carrying out centralized drying of the winding inner roll on the circuit film to completely solidify the bottom layer circuit, the gap bridge insulating layer and the gap bridge circuit, and winding the dried circuit film by the winding belt material receiving assembly;
wherein the primary semi-finished product, the secondary semi-finished product and the tertiary semi-finished product are integrated into a single winding belt;
preferably, the detection mechanism (5) is right after the film is detected, the signal is fed back to the drying assembly and/or the winding belt material receiving assembly, the drying assembly adjusts the drying temperature and the wind speed after receiving the feedback signal, and the winding belt material receiving assembly adjusts the winding speed after receiving the feedback signal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111332269.6A CN114040582A (en) | 2021-11-11 | 2021-11-11 | Circuit printing forming equipment and method for keyboard circuit film |
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| CN202111332269.6A CN114040582A (en) | 2021-11-11 | 2021-11-11 | Circuit printing forming equipment and method for keyboard circuit film |
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Cited By (1)
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