CN112161470A - Multi-temperature tunnel furnace for circuit board curing - Google Patents
Multi-temperature tunnel furnace for circuit board curing Download PDFInfo
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- CN112161470A CN112161470A CN202011081692.9A CN202011081692A CN112161470A CN 112161470 A CN112161470 A CN 112161470A CN 202011081692 A CN202011081692 A CN 202011081692A CN 112161470 A CN112161470 A CN 112161470A
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- temperature
- heating
- circuit board
- graphite
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- 238000001035 drying Methods 0.000 claims abstract description 53
- 239000000835 fiber Substances 0.000 claims abstract description 17
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000000741 silica gel Substances 0.000 claims abstract description 16
- 229910002027 silica gel Inorganic materials 0.000 claims abstract description 16
- 238000010438 heat treatment Methods 0.000 claims description 98
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 62
- 229910002804 graphite Inorganic materials 0.000 claims description 47
- 239000010439 graphite Substances 0.000 claims description 47
- 230000007246 mechanism Effects 0.000 claims description 46
- 238000005485 electric heating Methods 0.000 claims description 36
- 239000000463 material Substances 0.000 claims description 36
- 238000007791 dehumidification Methods 0.000 claims description 16
- 238000013016 damping Methods 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 238000001179 sorption measurement Methods 0.000 claims description 8
- 238000010521 absorption reaction Methods 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 5
- 239000000428 dust Substances 0.000 claims description 5
- 238000007711 solidification Methods 0.000 claims description 3
- 230000008023 solidification Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 14
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000008859 change Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 239000002904 solvent Substances 0.000 description 5
- 238000005452 bending Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000007639 printing Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 238000001599 direct drying Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 206010053615 Thermal burn Diseases 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/02—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity of multiple-track type; of multiple-chamber type; Combinations of furnaces
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/14—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment
- F27B9/20—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace
- F27B9/24—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity characterised by the path of the charge during treatment; characterised by the means by which the charge is moved during treatment the charge moving in a substantially straight path tunnel furnace being carried by a conveyor
- F27B9/243—Endless-strand conveyor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
- F27B9/36—Arrangements of heating devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
- F27B9/38—Arrangements of devices for charging
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
- F27B9/40—Arrangements of controlling or monitoring devices
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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
- H05K3/22—Secondary treatment of printed circuits
- H05K3/227—Drying of printed circuits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
- F27B2009/3088—Drying arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
- F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
- F27B9/38—Arrangements of devices for charging
- F27B2009/382—Charging
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27M—INDEXING SCHEME RELATING TO ASPECTS OF THE CHARGES OR FURNACES, KILNS, OVENS OR RETORTS
- F27M2003/00—Type of treatment of the charge
- F27M2003/02—Preheating, e.g. in a laminating line
- F27M2003/025—Drying
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27M—INDEXING SCHEME RELATING TO ASPECTS OF THE CHARGES OR FURNACES, KILNS, OVENS OR RETORTS
- F27M2003/00—Type of treatment of the charge
- F27M2003/08—Curing; Baking
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The technical scheme of the invention is realized as follows: a multi-temperature tunnel furnace for curing a circuit board comprises a shell, a conveying device and a baking device, wherein the conveying device and the baking device are arranged in the shell; the conveying device comprises two first conveying rollers, each first conveying roller is fixed inside the shell through a first conveying support, a first motor used for controlling the first conveying rollers to rotate is arranged on each first conveying support, a first conveying belt is sleeved on each first conveying roller, a plurality of fixing units are arranged on each conveying belt, each fixing unit comprises two supporting units which are arranged in parallel, each supporting unit comprises a fiber rod and a silica gel block fixed on the fiber rod, and the fiber rods are obliquely arranged towards the direction of a feed inlet; the invention has the beneficial effects that: the conveying circuit board is stable during drying, and the drying effect is good and the efficiency is high.
Description
Technical Field
The invention relates to the technical field of circuit board drying equipment, in particular to a multi-temperature tunnel furnace for curing a circuit board.
Background
The application of the printed circuit board is more and more extensive, the demand is more and more large, in the course of its processing, need to bake it to achieve the goal of drying, and the baking of the printed circuit board is mostly carried on through the tunnel oven; in the drying process of the circuit board, firstly, the ink on the circuit board is semi-cured through an ultraviolet semi-curing device, and then, the aim of complete curing is achieved through drying and drying of a tunnel furnace.
The existing tunnel furnace generally places a circuit board to be dried on a conveying device in the tunnel furnace for conveying, and then dries through a heating unit in the tunnel furnace to achieve the purpose of curing character ink on the circuit board; however, when the tunnel furnace is used, the following problems exist: firstly, the existing constant-temperature drying mode is adopted, the complete curing of the interior of the circuit board printing ink cannot be guaranteed, the curing effect is influenced, and meanwhile, the working efficiency is influenced due to the longer curing time; secondly, when the circuit board is dried and discharged in the tunnel furnace and the circuit board is conveyed to discharge, the temperature difference between the inside and the outside of the tunnel furnace is overlarge, and the circuit board with high temperature suddenly contacts cold air to influence the quality of ink solidification during discharging; thirdly, the circuit board is usually fixed by clamping in the prior tunnel furnace when the circuit board is conveyed, and then the fixed circuit board is controlled to move and dry in the tunnel furnace, so that the mode is troublesome, the circuit board needs to be manually clamped on a clamp, time and labor are wasted, and the clamp can possibly cause abrasion to the circuit board.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the multi-temperature tunnel furnace for curing the circuit board, which has the advantages of good ink drying and curing effect, high drying efficiency, stable drying and convenient conveying.
The technical scheme of the invention is realized as follows: a multi-temperature tunnel furnace for circuit board solidification which characterized in that: the baking device comprises a shell, and a conveying device and a baking device which are arranged in the shell, wherein a feed inlet is formed in the left side of the shell, and a discharge outlet is formed in the right side of the shell; the conveying device comprises two first conveying rollers which are respectively positioned at openings at two ends of a shell, each first conveying roller is fixed in the shell through a first conveying support, a first motor used for controlling the first conveying rollers to rotate is arranged on each first conveying support, the output end of each first motor is fixedly connected with the first conveying rollers, a first conveying belt is sleeved on each first conveying roller and is in transmission connection with the first conveying rollers, a plurality of fixing units used for fixing a circuit board are uniformly arranged on each conveying belt at intervals, each fixing unit comprises two supporting units which are arranged on the first conveying belts in parallel, each supporting unit comprises two silica gel blocks and two fiber rods, one ends of the two fiber rods are fixed on the first conveying belt, the silica gel blocks are fixed at one ends of limiting rods far away from the first conveying belts, and the silica gel blocks are connected with the two fiber rods, the fiber rod is obliquely arranged towards the direction of the feed inlet.
Preferably: conveying device's both ends all are provided with fortune material mechanism about, fortune material device passes feed inlet and discharge gate to the fortune material mechanism of conveying device left end is the example: one end of the material conveying mechanism is positioned in the shell, and the other end of the material conveying mechanism penetrates through the feeding hole to the outside of the shell; the material transporting mechanism comprises a second conveying support, a second motor arranged on the second conveying support and two second conveying rollers arranged on the second conveying support and controlled by the second motor, four second conveying belts are arranged on the two second conveying rollers, the second conveying belts are parallel to each other and arranged at intervals, and gaps between the second conveying belts can be penetrated by the supporting units.
Preferably: the feeding port is further provided with a guide mechanism, the guide mechanism is located on the left side of the conveying mechanism and comprises a third conveying support and a plurality of rotating shafts, the rotating shafts are arranged on the third conveying support at equal intervals, the rotating shafts are arranged in parallel, the rotating shafts and the second conveying rollers are located at the same height, third motors, the number of which is matched with the rotating shafts, are arranged on the third conveying support, each rotating shaft corresponds to one third motor and is fixedly connected with the third motor and is controlled to rotate by the third motor, a plurality of conveying discs are arranged on each rotating shaft, and the conveying discs are evenly arranged on the conveying rollers.
Preferably: the conveying disc comprises a blank body, an elastic layer arranged outside the blank body and an activated carbon adsorption layer arranged outside the elastic layer, and dust absorption holes are formed in the surface of the activated carbon adsorption layer; be provided with damper between body and the axis of rotation, damper includes rubber ring, damper plate and the damping spring who sets gradually from axis of rotation to body direction, the damper plate passes through rubber ring bonding to be fixed in the axis of rotation, damping spring's both ends respectively with damper plate and body fixed connection.
Preferably: the baking device comprises a steam heating device and an electric heating device, the interior of the shell is sequentially divided into a low-temperature area, a drying area, a high-temperature area, a drying area and a low-temperature area from left to right, the temperature of the high-temperature area is higher than that of the drying area, and the temperature of the drying area is higher than that of the low-temperature area; the steam heating device is arranged in the high-temperature area, and the electric heating device comprises a first electric heating device arranged in the low-temperature area, a second electric heating device arranged in the drying area and a controller arranged on the shell.
Preferably: first electric heater unit includes graphite hot plate, first temperature sensor, first heating electrode and the second heating electrode be connected with the controller, graphite hot plate and first temperature sensor are all fixed on the casing and are located the conveyor upper end, first heating electrode and second heating electrode are all fixed on the graphite hot plate, the heating power of second heating electrode is greater than the heating power of first heating electrode, the second heating electrode sets up and is being close to casing center direction to left first electric heater unit is the example: the first heating electrode is arranged at one end close to the feeding hole and is positioned between the feeding hole and the second heating electrode; and a heat transfer block is also arranged between the first heating electrode and the second heating electrode.
Preferably: the second electric heater unit includes second temperature sensor, graphite mount and the graphite heating rod be connected with the controller, second temperature sensor fixes on the graphite mount, the graphite mount is located same height and is located between two first conveying rollers with first conveying roller, both ends are fixed on the casing around the graphite mount, the graphite heating rod is many and mutual parallel mount on the graphite mount, the graphite heating rod sets up along first conveyer belt length direction, be provided with the sawtooth on the graphite heating rod, sawtooth density on the graphite heating rod prolongs first conveying roller direction from the conveyer belt center and diminishes gradually.
Preferably: steam heating device includes the steam generator who is connected with the controller, returns shape intake pipe and air pump, steam generator and air pump are all fixed outside the casing, it all passes the casing and is connected with steam generator and air pump to return the both ends of shape intake pipe, it is provided with the kink to return the one end that the shape intake pipe is close to conveyor, return and seted up the venthole in the one end that is close to conveyor on the kink of shape intake pipe.
Preferably: the steam heating device further comprises a third temperature sensor and an auxiliary electric heating pipe, the auxiliary electric heating pipe is located between the square-shaped air inlet pipe and the conveying device, the electric heating pipe is connected with the controller, the auxiliary electric heating pipe is fixed on the inner side wall of the shell through an auxiliary fixing frame, and the third temperature sensor is fixed on the auxiliary fixing frame.
Preferably: the inside dehydrating unit that still is provided with of casing, dehydrating unit sets up and just is located the conveyor upper end in the drying zone, dehydrating unit includes the dehumidification stick, set up a plurality of supplies dehumidification stick follow outside male dehumidification holes on the casing lateral wall, inside the casing was inserted to the one end of dehumidification stick, be fixed with the spacing ring on the dehumidification stick, the spacing ring is located the casing outside, the parcel has the layer that absorbs water on the inside dehumidification stick of casing.
The invention has the beneficial effects that: (1) the circuit board is supported by the two supporting units arranged on the first conveying belt, the stability of conveying of the circuit board is guaranteed compared with the prior mode that a clamp is adopted to fix the circuit board, the circuit board depends on the silica gel block through arrangement of the silica gel block, the influence on quality caused by abrasion of the circuit board is avoided, meanwhile, the circuit board is prevented from sliding in the conveying process, and compared with the prior mode that the clamp is adopted, the circuit board is convenient to fix and is not easy to abrade.
(2) Through the setting of fortune material mechanism, need not artifically place the support element with the circuit board one by one on, through fortune material mechanism and conveyor's cooperation with the circuit board from the outside conveyor of casing, save artifically, it is convenient to carry, reduces the hand contact, avoids the multicontact of circuit board to lead to wearing and tearing, guarantees the quality of circuit board.
(3) Through the arrangement of the baking device, the interior of the shell is divided into a low-temperature area, a drying area and a high-temperature area, different drying temperatures are provided for each area, after the circuit board enters the shell, the circuit board is dried in a mode of gradually increasing temperature and then gradually reducing temperature, the drying effect is good, the drying mode is different from the previous constant-temperature drying mode, the temperature change drying mode is adopted, the solvent in the ink can be ensured to be completely volatilized, the ink can be gradually cured from the interior, the phenomenon that the solvent in the external curing of the ink cannot be volatilized due to direct drying to cause that the ink cannot be completely cured is avoided, meanwhile, the curing efficiency is improved, the ink can be completely cured within forty to fifty minutes from the curing time of more than two hours before, and the production efficiency is greatly improved; meanwhile, the mode can ensure that the lower temperature is kept when the circuit board discharges materials, avoid the phenomenon that the ink is unstable due to the overlarge temperature difference with the outside and ensure the drying stability of the circuit board.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic overall structure diagram of an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a material conveying mechanism at a material inlet according to an embodiment of the present invention;
FIG. 3 is a schematic top view of a material handling mechanism at a feed inlet in an embodiment of the present invention;
FIG. 4 is a schematic cross-sectional view of a transfer plate in an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a first electric heating apparatus according to an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a second electric heating apparatus according to an embodiment of the present invention;
FIG. 7 is a schematic view of a steam heating apparatus according to an embodiment of the present invention;
FIG. 8 is a schematic view of the installation of an auxiliary electric heating tube in an embodiment of the present invention;
FIG. 9 is a schematic diagram of a dehumidifier in accordance with an embodiment of the present invention;
the examples in the figure are: 1. a housing 101, a low temperature zone 102, a drying zone 103, a high temperature zone 104, a feed inlet 105, a discharge outlet 2, a conveying device 21, a first conveying roller 22, a first conveying bracket 23, a first motor 24, a first conveying belt 25, a silica gel block 26, a fiber rod 3, a material conveying mechanism 31, a second conveying bracket 32, a second motor 33, a second conveying roller 34, a second conveying belt 4, a guide mechanism 41, a third conveying bracket 42, a rotating shaft 43, a third motor 44, a conveying disc 441, a blank 442, an elastic layer 443, an activated carbon adsorption layer 444, a rubber ring 445, a damping plate 446, a damping spring 5, a first electric heating device 51, a graphite heating plate 52, a first temperature sensor 53, a first heating electrode 54, a second heating electrode 55, a heat transfer block 6, a second electric heating device, 61. the device comprises a second temperature sensor, 62, a graphite heating rod, 63, a graphite fixing frame, 7, a steam heating device, 71, a steam generator, 72, a square-shaped air inlet pipe, 73, an air pump, 74, an air outlet hole, 75, a third temperature sensor, 76, an auxiliary electric heating pipe, 77, an auxiliary fixing frame, 8, a dehumidifying device, 81, a dehumidifying rod, 82, a dehumidifying hole, 83, a limiting ring, 84, a water absorption layer, 9 and a controller.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
As shown in fig. 1 to 7, the invention discloses a multi-temperature tunnel furnace for curing a circuit board, which comprises a housing 1, and a conveying device 2 and a baking device which are arranged in the housing 1, wherein the left side of the housing 1 is provided with a feed inlet 104, and the right side of the housing 1 is provided with a discharge outlet 105; the conveying device 2 comprises two first conveying rollers 21 respectively positioned at openings at two ends of a shell 1, each first conveying roller 21 is fixed inside the shell 1 through a first conveying support 22, the first conveying rollers 21 are rotatably installed on the first conveying supports 22, the first conveying supports 22 are welded and fixed with the bottom wall of the shell 1, a first motor 23 for controlling the first conveying rollers 21 to rotate is fixed on the first conveying supports 22 through screws, the output end of the first motor 23 is fixedly connected with the first conveying rollers 21, a first conveying belt 24 is sleeved on the first conveying rollers 21, the first conveying belt 24 is in transmission connection with the first conveying rollers 21, the first conveying rollers 21 rotate to drive the first conveying belt 24 to move, the first conveying rollers 21 rotate clockwise, and a plurality of fixing units for fixing a circuit board are uniformly arranged on the conveying belts at intervals, each fixed unit all includes two support element that set up side by side on first conveyer belt, support element includes silica gel block 25 and fibre pole 26, fibre pole 26 is two and its one end all fixes on first conveyer belt 24, silica gel block 25 is fixed in the one end that first conveyer belt 24 was kept away from to the gag lever post, two fibre poles 26 are connected to silica gel block 25, and this silica gel block 25 wraps up and bonds fixedly with the one end of two fibre poles 26, fibre pole 26 sets up towards the slope of feed inlet 104 direction.
Through the technical scheme, drive first conveying roller through first motor and rotate, thereby drive the transportation of first conveyer belt, when carrying, place the circuit board of having printed printing ink on the gag lever post, the gag lever post slope sets up and guarantees to support the circuit board, avoid the circuit board to collapse in transportation, support the stability of guaranteeing the circuit board to carry through two support element to the circuit board, setting through the silica gel piece, the circuit board relies on the silica gel piece, avoid circuit board wearing and tearing influence quality, avoid the circuit board to slide in transportation simultaneously, different than the mode of preceding adoption anchor clamps, the circuit board is fixed convenient, be difficult for causing wearing and tearing.
In this embodiment, the left and right ends of the conveying device 2 are provided with material transporting mechanisms 3, and the material transporting device passes through the material inlet 104 and the material outlet 105, taking the material transporting mechanism 3 at the left end of the conveying device 2 as an example: one end of the material conveying mechanism 3 is positioned inside the shell 1, and the other end of the material conveying mechanism penetrates through the feeding hole 104 to the outside of the shell 1; the material transporting mechanism 3 comprises a second conveying support 31, a second motor 32 installed on the second conveying support 31, and two second conveying rollers 33 installed on the second conveying support 31 and controlled by the second motor 32, one end of the second conveying support 31 is located inside the shell 1, the other end of the second conveying support 31 is located outside the shell 1, four second conveying belts 34 are arranged on the two second conveying rollers 33, the second conveying belts 34 are parallel to each other and arranged at intervals, gaps between the second conveying belts can be passed by the supporting units, the second motor 32 drives the second conveying rollers 33 to rotate clockwise, and the second conveying rollers 33 drive the four second conveying belts 34 to move.
Through the technical scheme: the circuit board is placed on a second conveying belt through the arrangement of the material conveying mechanism, a second motor drives the second conveying belt to rotate so as to drive the second conveying belt to convey, the circuit board is conveyed by the second conveying belt to enter the shell from the outside of the shell through a feed port, the conveying device keeps working, a supporting unit on the first conveying belt upwards rotates at the feed port, the second conveying belt drives the circuit board to be conveyed above the supporting unit, the supporting unit upwards rotates to drive the circuit board to the first conveying belt, the circuit board enters the conveying mechanism from the material conveying mechanism to be conveyed and dried, after drying, the circuit board enters the right end of the conveying device, the supporting unit downwards rotates, the circuit board is prevented by the material conveying mechanism and is conveyed out of the shell through the second conveying belt, and the conveying device continues conveying; through the setting of fortune material mechanism, need not artifically place the support element with the circuit board one by one on, through fortune material mechanism and conveyor's cooperation with circuit board automatic transportation to conveyor, save artifically, it is convenient to carry, reduces the manual contact, avoids the multicontact of circuit board to lead to wearing and tearing, guarantees the quality of circuit board.
In this embodiment, the feed inlet 104 is further provided with a guide mechanism 4, the guide mechanism 4 is located on the left side of the material conveying mechanism 3, the guide mechanism 4 includes a third conveying support 41 and four rotating shafts 42 evenly spaced on the third conveying support 41, the rotating shafts 42 are arranged in parallel, the rotating shafts 42 and the second conveying rollers 33 are located at the same height, the third conveying support 41 is provided with third motors 43 whose number is matched with that of the rotating shafts 42, each rotating shaft 42 is correspondingly and fixedly connected with one third motor 43 and is controlled to rotate by the third motor 43, the rotating shafts 42 rotate clockwise, the output power of each third motor 43 is the same, each rotating shaft 42 is provided with five conveying discs 44, the conveying discs 44 are evenly arranged on the conveying rollers, and the conveying discs 44 are fixed on the rotating shafts 42.
According to the technical scheme, the circuit board is placed on the conveying disc of the guide mechanism through the arrangement of the guide mechanism, the third motor drives the rotating shaft to rotate, and the rotating disc rotates along with the rotating shaft to drive the circuit board to convey to the conveying mechanism; because of the setting of feed inlet, the hot-air of casing portion can partly run out from the feed inlet, consequently fortune material device department probably temperature is higher, and unsuitable staff's work can solve this problem through guiding mechanism's setting, and the staff can place the circuit board on guiding mechanism in a distance, carries the circuit board to fortune material mechanism through guiding mechanism on, guarantees that the staff scalds, guarantees good operational environment.
In this embodiment, the conveying tray 44 includes a blank 441, an elastic layer 442 disposed outside the blank 441, and an activated carbon adsorption layer 443 disposed outside the elastic layer 442, wherein the blank 441 is annular, and dust suction holes are opened on the surface of the activated carbon adsorption layer 443; a damping mechanism is arranged between the blank body 441 and the rotating shaft 42, the damping mechanism comprises a rubber ring 444, a damping plate 445 and a damping spring 446 which are sequentially arranged from the rotating shaft 42 to the blank body 441, the damping plate 445 is fixedly bonded on the rotating shaft 42 through the rubber ring, and two ends of the damping spring 446 are respectively fixedly connected with the damping plate 445 and the blank body 441.
Through above-mentioned technical scheme, through setting the transfer dish to multiple structure, can adsorb the dust on circuit board surface through the setting of active carbon adsorption layer, guarantee the cleanness of circuit board, the dust flies upward when avoiding drying and gets into influence circuit board quality in the printing ink, through elastic layer, damper plate, rubber ring and damping spring's setting, provides the buffering when the circuit board is transferred to the power transmission, vibrations when reducing the circuit board are transferred to, avoid the circuit board shake, guarantee the stability of transfer circuit board.
In this embodiment, the baking device includes a steam heating device 7 and an electric heating device, the inside of the casing 1 is sequentially divided into a low-temperature region 101, a drying region 102, a high-temperature region 103, a drying region 102, and a low-temperature region 101 from left to right, the temperature of the high-temperature region 103 is greater than that of the drying region 102, and the temperature of the drying region 102 is greater than that of the low-temperature region 101; the steam heating device 7 is installed in the high temperature region 103, and the electric heating device includes a first electric heating device 5 disposed in the low temperature region 101, a second electric heating device 6 disposed in the drying region 102, and a controller 9 installed on the casing 1.
According to the technical scheme, the inner part of the shell is provided with the low-temperature area, the drying area and the high-temperature area, different drying temperatures are provided for each area, after the circuit board enters the shell, the circuit board is dried in a mode of gradually increasing temperature and then gradually reducing temperature, the drying effect is good, the temperature change drying mode is adopted, the solvent in the ink can be ensured to be completely volatilized, the ink can be ensured to be gradually cured from the inside, the phenomenon that the solvent in the ink can not be volatilized when the ink is cured outside due to direct drying and can not be completely cured due to incomplete volatilization of the solvent is avoided, the curing efficiency is improved, the ink can be completely cured within forty to fifty minutes from the curing time more than two hours before, and the production efficiency is greatly improved; meanwhile, the mode can ensure that the lower temperature is kept when the circuit board discharges materials, avoid the phenomenon that the ink is unstable due to the overlarge temperature difference with the outside and ensure the drying stability of the circuit board.
In this embodiment, the first electric heating device 5 includes a graphite heating plate 51, a first temperature sensor 52, a first heating electrode 53 and a second heating electrode 54 connected to the controller 9, the graphite heating plate 51 and the first temperature sensor 52 are both fixed on the housing 1 and located at the upper end of the conveying device 2, the first heating electrode 53 and the second heating electrode 54 are both fixed on the graphite heating plate 51, the heating power of the second heating electrode 54 is greater than that of the first heating electrode 53, the second heating electrode 54 is disposed near the center of the housing 1, taking the first electric heating device 5 on the left side as an example: the first heating electrode 53 is arranged at one end close to the feed inlet 104, and the first heating electrode 53 is positioned between the feed inlet 104 and the second heating electrode 54; a heat transfer block 55 is further disposed between the first heating electrode 53 and the second heating electrode 54.
Through the technical scheme, the output power of the first heating electrode and the output power of the second heating electrode are controlled through the controller, so that the heating temperature of the second heating electrode is higher than that of the first heating electrode, the temperatures of the first heating electrode and the second heating electrode are transmitted through the heat transmission block, and a gradually rising temperature (during feeding) or a gradually falling temperature (during discharging) is formed in the low-temperature area; the real-time temperature is measured through the first temperature sensor and converted into an electric signal to be transmitted to the controller, then the output power of the first heating electrode and the output power of the second heating motor are controlled through the controller to adjust the temperature, the temperature is conveniently controlled and adjusted, and the drying stability of the circuit board is ensured.
In this embodiment, the second electric heating device 6 includes a second temperature sensor 61, a graphite fixing frame 63, and a graphite heating rod 62 connected to the controller 9, the second temperature sensor 61 is fixed on the graphite fixing frame 63, the graphite fixing frame 63 and the first conveying rollers 21 are located at the same height and located between the two first conveying rollers 21, front and rear ends of the graphite fixing frame 63 are fixed on the housing 1, the graphite heating rods 62 are installed on the graphite fixing frame 63 in parallel, the graphite heating rod 62 is arranged along the length direction of the first conveying belt 24, sawteeth are arranged on the graphite heating rod 62, and the density of the sawteeth on the graphite heating rod 62 is gradually reduced from the center of the conveying belt along the direction of the first conveying rollers 21; the proportion of heating power is controlled by the density proportion of the sawteeth on the graphite heating rod, and the density of the sawteeth between the two parts of the graphite heating rod is controlled in the manufacturing process, so that the graphite heating rod can obtain the required working temperature when working.
Through the technical scheme: according to the sawtooth density difference of graphite heating rod, the part that will power is low is towards low-temperature region, the part that power is high is towards high-temperature region, form the temperature of gradual change in the drying area, guarantee drying step by step of circuit board, guarantee the stoving effect, second temperature sensor records the temperature of drying area, the controller of being convenient for is to the regulation of drying area internal temperature, the change of structure control drying area internal temperature through graphite heating rod self, the heating is stable, the temperature change rate is little, guarantee circuit board stoving effect.
In this embodiment, the steam heating device 7 includes a steam generator 71, a paper-clip air inlet pipe 72 and an air pump 73 that are connected with the controller 9, the steam generator 71 and the air pump 73 are all fixed outside the casing 1, both ends of the paper-clip air inlet pipe 72 all pass through the casing 1 and are connected with the steam generator 71 and the air pump 73, one end of the paper-clip air inlet pipe 72 that is close to the conveying device 2 is provided with a bending part, an air outlet 74 has been seted up at one end that is close to the conveying device 2 on the bending part of the paper-clip air inlet pipe 72, the air pump 73 drives high-temperature steam to flow in the paper-clip pipe, and the high-temperature steam is sprayed to the.
Through the technical scheme: the circuit board is dried in a high-temperature area through the arrangement of the steam heating device, the steam generator conveys hot air into the clip-shaped air inlet pipe, the hot air is contacted with the circuit board through the air outlet hole to heat the circuit board, and meanwhile, the air pump is started to drive the hot air in the clip-shaped air inlet pipe to flow, so that the flowability of the hot air is improved, the hot air can fully flow out of the air outlet hole, and the heating and drying efficiency is improved; the arrangement of the bending part enables hot air to be discharged from the air outlet holes of the bending part to be in contact with the circuit board, the contact area of the circuit board and the hot air is increased, and the drying effect is improved.
Example 2
As shown in fig. 8 and 9, the present embodiment is different from the above-described embodiments in that: in this embodiment, the steam heating device 7 further includes a third temperature sensor 75 and an auxiliary electric heating pipe 76, the auxiliary electric heating pipe 76 is located between the clip-shaped air inlet pipe 72 and the conveying device 2, the electric heating pipe is connected with the controller 9, the auxiliary electric heating pipe 76 is fixed on the inner side wall of the casing 1 through an auxiliary fixing frame 77, the third temperature sensor 75 is fixed on the auxiliary fixing frame 77, and the electric heating pipe is used for auxiliary heating when the steam heating temperature is insufficient.
Through the technical scheme, record the temperature in the high temperature region and transmit temperature value to the controller through third temperature sensor's setting, when the temperature is on the low side, start the air pump through the controller and drive the steam flow, improve the stoving effect, still when not enough can't reach better stoving effect when the temperature, drive the work of supplementary electric heating pipe through the controller, heat again the high temperature region, quota and steam heating are together dried the circuit board, supplementary electric heating pipe plays the auxiliary heating effect, be used for emergency treatment, guarantee the stability of circuit board stoving.
In this embodiment, a dehumidifying device 8 is further disposed inside the casing 1, the dehumidifying device 8 is disposed in the drying region 102 and located at the upper end of the conveying device 2, the dehumidifying device 8 includes a dehumidifying rod 81, a plurality of dehumidifying holes 82 for the dehumidifying rod 81 to be inserted from the outside are disposed on the side wall of the casing 1, one end of the dehumidifying rod 81 is inserted into the casing 1, a limiting ring 83 is fixed on the dehumidifying rod 81, the limiting ring 83 is located outside the casing 1, a water absorbing layer 84 is wrapped on the dehumidifying rod 81 inside the casing 1, and the water absorbing layer 84 is bonded on the dehumidifying rod 81; the dehumidifying stick 81 can be taken out from the dehumidifying hole 82 for replacement of the water absorbing layer 84.
Through the technical scheme, through the arrangement of the dehumidifying device, when the circuit board dries the interior of the shell, moisture in the ink of the circuit board can be dispersed into the interior of the shell to influence the curing effect, and the moisture in the shell is adsorbed through the water absorbing layer of the dehumidifying device, so that the moisture in the shell is prevented from influencing the curing of the ink, and the drying effect of the circuit board is ensured; can follow the dehumidification and take out the water absorption layer and change the dehumidification stick from the dehumidification downthehole water absorption layer that absorbs water after the layer adsorbs excessively, guarantee good water absorption effect, the setting of spacing ring is avoided the dehumidification stick to all enter into the casing inside and can't take out.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A multi-temperature tunnel furnace for circuit board solidification which characterized in that: the baking device comprises a shell, a conveying device and a baking device, wherein the conveying device and the baking device are arranged in the shell; the conveying device comprises two first conveying rollers which are respectively positioned at openings at two ends of a shell, each first conveying roller is fixed in the shell through a first conveying support, a first motor used for controlling the first conveying rollers to rotate is arranged on each first conveying support, the output end of each first motor is fixedly connected with the first conveying rollers, a first conveying belt is sleeved on each first conveying roller and is in transmission connection with the first conveying rollers, a plurality of fixing units used for fixing a circuit board are uniformly arranged on each conveying belt at intervals, each fixing unit comprises two supporting units which are arranged on the first conveying belts in parallel, each supporting unit comprises two silica gel blocks and two fiber rods, one ends of the two fiber rods are fixed on the first conveying belt, the silica gel blocks are fixed at one ends of limiting rods far away from the first conveying belts, and the silica gel blocks are connected with the two fiber rods, the fiber rod is obliquely arranged towards the direction of the feed inlet.
2. The multi-temperature tunnel oven for curing circuit boards of claim 1, wherein: conveying device's both ends all are provided with fortune material mechanism about, fortune material device passes feed inlet and discharge gate to the fortune material mechanism of conveying device left end is the example: one end of the material conveying mechanism is positioned in the shell, and the other end of the material conveying mechanism penetrates through the feeding hole to the outside of the shell; the material transporting mechanism comprises a second conveying support, a second motor arranged on the second conveying support and two second conveying rollers arranged on the second conveying support and controlled by the second motor, four second conveying belts are arranged on the two second conveying rollers, the second conveying belts are parallel to each other and arranged at intervals, and gaps between the second conveying belts can be penetrated by the supporting units.
3. The multi-temperature tunnel oven for curing circuit boards of claim 2, wherein: the feeding port is further provided with a guide mechanism, the guide mechanism is located on the left side of the conveying mechanism and comprises a third conveying support and a plurality of rotating shafts, the rotating shafts are arranged on the third conveying support at equal intervals, the rotating shafts are arranged in parallel, the rotating shafts and the second conveying rollers are located at the same height, third motors, the number of which is matched with the rotating shafts, are arranged on the third conveying support, each rotating shaft corresponds to one third motor and is fixedly connected with the third motor and is controlled to rotate by the third motor, a plurality of conveying discs are arranged on each rotating shaft, and the conveying discs are evenly arranged on the conveying rollers.
4. A multi-temperature tunnel oven for curing circuit boards as claimed in claim 3 wherein: the conveying disc comprises a blank body, an elastic layer arranged outside the blank body and an activated carbon adsorption layer arranged outside the elastic layer, and dust absorption holes are formed in the surface of the activated carbon adsorption layer; be provided with damper between body and the axis of rotation, damper includes rubber ring, damper plate and the damping spring who sets gradually from axis of rotation to body direction, the damper plate passes through rubber ring bonding to be fixed in the axis of rotation, damping spring's both ends respectively with damper plate and body fixed connection.
5. The multi-temperature tunnel furnace for circuit board curing according to any one of claims 1 to 4, wherein: the baking device comprises a steam heating device and an electric heating device, the interior of the shell is sequentially divided into a low-temperature area, a drying area, a high-temperature area, a drying area and a low-temperature area from left to right, the temperature of the high-temperature area is higher than that of the drying area, and the temperature of the drying area is higher than that of the low-temperature area; the steam heating device is arranged in the high-temperature area, and the electric heating device comprises a first electric heating device arranged in the low-temperature area, a second electric heating device arranged in the drying area and a controller arranged on the shell.
6. The multi-temperature tunnel furnace for curing circuit boards of claim 5, wherein: first electric heater unit includes graphite hot plate, first temperature sensor, first heating electrode and the second heating electrode be connected with the controller, graphite hot plate and first temperature sensor are all fixed on the casing and are located the conveyor upper end, first heating electrode and second heating electrode are all fixed on the graphite hot plate, the heating power of second heating electrode is greater than the heating power of first heating electrode, the second heating electrode sets up and is being close to casing center direction to left first electric heater unit is the example: the first heating electrode is arranged at one end close to the feeding hole and is positioned between the feeding hole and the second heating electrode; and a heat transfer block is also arranged between the first heating electrode and the second heating electrode.
7. The multi-temperature tunnel furnace for curing circuit boards of claim 5, wherein: the second electric heater unit includes second temperature sensor, graphite mount and the graphite heating rod be connected with the controller, second temperature sensor fixes on the graphite mount, the graphite mount is located same height and is located between two first conveying rollers with first conveying roller, both ends are fixed on the casing around the graphite mount, the graphite heating rod is many and mutual parallel mount on the graphite mount, the graphite heating rod sets up along first conveyer belt length direction, be provided with the sawtooth on the graphite heating rod, sawtooth density on the graphite heating rod prolongs first conveying roller direction from the conveyer belt center and diminishes gradually.
8. The multi-temperature tunnel furnace for curing circuit boards of claim 5, wherein: steam heating device includes the steam generator who is connected with the controller, returns shape intake pipe and air pump, steam generator and air pump are all fixed outside the casing, it all passes the casing and is connected with steam generator and air pump to return the both ends of shape intake pipe, it is provided with the kink to return the one end that the shape intake pipe is close to conveyor, return and seted up the venthole in the one end that is close to conveyor on the kink of shape intake pipe.
9. The multi-temperature tunnel oven for curing circuit boards of claim 6, wherein: the steam heating device further comprises a third temperature sensor and an auxiliary electric heating pipe, the auxiliary electric heating pipe is located between the square-shaped air inlet pipe and the conveying device, the electric heating pipe is connected with the controller, the auxiliary electric heating pipe is fixed on the inner side wall of the shell through an auxiliary fixing frame, and the third temperature sensor is fixed on the auxiliary fixing frame.
10. The multi-temperature tunnel furnace for curing circuit boards of claim 5, wherein: the inside dehydrating unit that still is provided with of casing, dehydrating unit sets up and just is located the conveyor upper end in the drying zone, dehydrating unit includes the dehumidification stick, set up a plurality of supplies dehumidification stick follow outside male dehumidification holes on the casing lateral wall, inside the casing was inserted to the one end of dehumidification stick, be fixed with the spacing ring on the dehumidification stick, the spacing ring is located the casing outside, the parcel has the layer that absorbs water on the inside dehumidification stick of casing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011081692.9A CN112161470A (en) | 2020-10-12 | 2020-10-12 | Multi-temperature tunnel furnace for circuit board curing |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011081692.9A CN112161470A (en) | 2020-10-12 | 2020-10-12 | Multi-temperature tunnel furnace for circuit board curing |
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| Publication Number | Publication Date |
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| CN112161470A true CN112161470A (en) | 2021-01-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011081692.9A Pending CN112161470A (en) | 2020-10-12 | 2020-10-12 | Multi-temperature tunnel furnace for circuit board curing |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103999640A (en) * | 2013-12-04 | 2014-08-27 | 朱季华 | Sugarcane delivery roller |
| CN204056981U (en) * | 2014-08-23 | 2014-12-31 | 杭州重型钢管有限公司 | Steel pipe bont |
| CN108729181A (en) * | 2018-07-31 | 2018-11-02 | 芜湖瀚德信息科技有限公司 | A kind of textile apparatus with dedusting function |
| CN208450884U (en) * | 2018-07-09 | 2019-02-01 | 天津市中驰实业有限公司 | A kind of highly-safe automatic welder |
| CN209470484U (en) * | 2019-01-15 | 2019-10-08 | 东莞市华路宝机械设备有限公司 | A kind of dry continuous tunnel furnace of wiring board |
-
2020
- 2020-10-12 CN CN202011081692.9A patent/CN112161470A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103999640A (en) * | 2013-12-04 | 2014-08-27 | 朱季华 | Sugarcane delivery roller |
| CN204056981U (en) * | 2014-08-23 | 2014-12-31 | 杭州重型钢管有限公司 | Steel pipe bont |
| CN208450884U (en) * | 2018-07-09 | 2019-02-01 | 天津市中驰实业有限公司 | A kind of highly-safe automatic welder |
| CN108729181A (en) * | 2018-07-31 | 2018-11-02 | 芜湖瀚德信息科技有限公司 | A kind of textile apparatus with dedusting function |
| CN209470484U (en) * | 2019-01-15 | 2019-10-08 | 东莞市华路宝机械设备有限公司 | A kind of dry continuous tunnel furnace of wiring board |
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Application publication date: 20210101 |