CN213288969U - Reflow furnace for processing PCB with heat circulation - Google Patents

Abstract

The utility model discloses a reflow oven is used in processing of PCB board of heat circulation, including induction-pipe, casing and aspiration pump, inside one side both ends of casing all evenly are provided with the mechanism that heats, and the opposite side of the inside bottom of casing installs the third motor, and the output of third motor is fixed with the second fan, the casing is inside to run through there is transmission device, and the bottom of casing one side is provided with spacing base, the spout has been seted up to the inside of spacing base, and the equal sliding connection in both sides of spout inside has the slider, the both sides of spacing base all are provided with the U-shaped pole. The utility model discloses a evenly be fixed in the both ends of the inside one side of casing with the shell, and the inside one end of shell all is fixed with first motor, and the output of first motor all is fixed with first fan, and all is fixed with the heating tube between the inner wall of first fan top shell both sides, can blow hot-blastly to the PCB board, has the rapid heating advantage.

Description

Reflow furnace for processing PCB with heat circulation

Technical Field

The utility model relates to a PCB board processing technology field specifically is a reflow oven is used in PCB board processing of heat circulation.

Background

With the development of science and technology, electrical appliances are increasingly diversified, the utilization rate of the electrical appliances is continuously increased, circuits are arranged in the electrical appliances so as to enable the electrical appliances to work, the circuits are generally required to be welded on a circuit board, namely a PCB, in order to better connect the circuits, reflow soldering is generally used for melting and cooling tin paste, and a reflow oven is a device which is generally used for reflow soldering.

The existing reflow furnace for processing the PCB has the following defects: the heat cannot be recycled, so that waste is easily caused; the PCB is not placed quickly and accurately enough, and the PCB is easy to drop in the device; hot air cannot heat the two surfaces of the solder well, and the reflow soldering effect is not good.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a reflow oven is used in PCB board processing of heat circulation to propose the unable cyclic utilization of heat in solving above-mentioned background art, cause extravagant problem easily.

In order to achieve the above object, the utility model provides a following technical scheme: a reflow oven for processing a PCB board with heat circulation comprises an air feed pipe, a shell and an air pump, wherein both ends of one side inside the shell are uniformly provided with a heating mechanism, the other side of the bottom inside the shell is provided with a third motor, the output end of the third motor is fixed with a second fan, a transmission mechanism penetrates through the shell, the bottom end of one side of the shell is provided with a limiting base, the inside of the limiting base is provided with a chute, both sides inside the chute are connected with sliding blocks in a sliding manner, both sides of the limiting base are provided with U-shaped rods, one side of the bottom end of each U-shaped rod extends to one side of the inside of the chute and is fixed on the sliding block, one side of the top end of each U-shaped rod is fixed with a limiting plate, one side of the chute inside the limiting base is provided with a push-pull mechanism, the middle position of the top end of the shell is fixed with the, the inner walls of two sides of the bottom end of the air supply pipe are hinged with rotating plates, two ends of the interior of the air supply pipe above the rotating plates are fixed with baffles, the other side of the air pump is fixed with an air exhaust cover through a pipeline, and the top end of the air exhaust cover extends to the upper portion of a second fan in the shell.

Preferably, the inside of heating mechanism has set gradually first motor, shell, first fan and heating tube, the shell evenly is fixed in the both ends of the inside one side of casing, and the inside one end of shell all is fixed with first motor, the output of first motor all is fixed with first fan, and all is fixed with the heating tube between the inner wall of first fan top shell both sides.

Preferably, the shells are provided with eight groups in total, and the shells are symmetrical in pairs about the horizontal center line of the shell.

Preferably, the inside of push-and-pull mechanism has set gradually trace, lead screw, first conical gear, second conical gear, bull stick, crank and screw slider, the lead screw rotates to be connected in the inside of the spacing base of slider one side, and one side of lead screw is fixed with first conical gear, the outer wall cover of lead screw is equipped with screw slider, and screw slider's both ends all articulate there is the trace, the one end of trace all articulates in the inside of slider, the one end of spacing base opposite side is provided with the crank, and the one end of crank transversely installs the bull stick, the one end of bull stick extends to the inside of spacing base and is fixed with second conical gear.

Preferably, the first bevel gear is meshed with the second bevel gear, and the size of the first bevel gear is the same as that of the second bevel gear.

Preferably, transmission device's inside has set gradually driven roller, initiative and has changeed roller, conveyer belt, second motor and drive shaft, driven roller passes through the rotate bracket and connects in the intermediate position department of casing one side, and the one end of casing opposite side is fixed with the second motor through the support, the output end of second motor is fixed with the drive shaft, and the outer wall cover of drive shaft is equipped with the initiative and changes the roller, driven roller outer wall both sides initiative is changeed and all overlaps between the both sides of roller outer wall and is equipped with the conveyer belt, and the conveyer belt runs through in the inside of casing.

Compared with the prior art, the beneficial effects of the utility model are that:

(1) through the arrangement of the air supply pipe, the shell, the rotating plate, the baffle, the air exhaust cover and the air exhaust pump, blown heat can be absorbed by the air exhaust cover driven by the air exhaust pump and is conveyed into the shell through the air supply pipe, when hot air enters the device from the air supply pipe, the rotating plate is pushed to rotate away to form a gap so that the hot air passes through the gap, when hot air of the device escapes through the air supply pipe, the baffle blocks the rotating angle of the rotating plate so that the gap cannot be formed, heat loss is prevented, and therefore the heat can be recycled in the device, the resource utilization rate is improved, and the heat circulation function of the device is realized;

(2) through the arrangement of the push-pull mechanism, the limiting plates, the U-shaped rods, the sliding blocks, the sliding chutes and the limiting base, the crank is rotated to drive the rotating rod to rotate the second bevel gear, so that the screw rod rotates, the threaded sliding block can move, and then the linkage rod is driven, the linkage rod can apply thrust or tension to the sliding block, the distance between the limiting plates can be adjusted by driving the U-shaped rods, a PCB can be conveniently and quickly put down on a transmission belt, the efficiency is high, the PCB cannot shift in the transmission process, and the accurate placement function of the device is realized;

(3) through being provided with heating mechanism and transmission device, thereby the second motor drives the drive shaft and drives the initiative and change the roller rotation, transmission band and driven commentaries on classics roller are driven simultaneously, realize the transmission mesh, the board can be driven inside the access device, first motor can drive first fan and send the heat that the heating tube gived off to the face through the through-hole on shell surface, and all leave the gap between the conveyer belt and the outside, the lower surface most of board exposes in steam, the bottom of board also can receive sufficient thermally induced messenger tin cream and melt, can improve welded quality, the two-sided heating function of device has been realized.

Drawings

FIG. 1 is a schematic view of a front cross-section of the device of the present invention;

FIG. 2 is a schematic diagram of a side sectional structure of a limit plate of the device of the present invention;

FIG. 3 is a schematic view of a front cross-sectional structure of the air supply pipe of the device of the present invention;

fig. 4 is a schematic top view of the device conveying mechanism of the present invention;

figure 5 is the utility model discloses a limit base department cuts open structure schematic diagram

Figure 6 is the utility model discloses a limit base department is just cut open the structure schematic diagram.

In the figure: 1. an air supply pipe; 2. a heating mechanism; 201. a first motor; 202. a housing; 203. a first fan; 204. a heat generating tube; 3. a push-pull mechanism; 301. a linkage rod; 302. a screw rod; 303. a first bevel gear; 304. a second bevel gear; 305. a rotating rod; 306. a crank; 307. a threaded slider; 4. a housing; 5. a transport mechanism; 501. a driven roller; 502. actively rotating the roller; 503. a conveyor belt; 504. a second motor; 505. a drive shaft; 6. a third motor; 7. a second fan; 8. an air extraction hood; 9. an air pump; 10. a limiting plate; 11. a U-shaped rod; 12. a slider; 13. a chute; 14. rotating the plate; 15. a baffle plate; 16. a limiting base.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-6, the present invention provides a technical solution: a reflow furnace for processing a PCB board with heat circulation comprises an air supply pipe 1, a shell 4 and an air pump 9, wherein both ends of one side inside the shell 4 are uniformly provided with heating mechanisms 2;

the heating mechanism 2 is internally provided with a first motor 201, a shell 202, a first fan 203 and a heating tube 204 in sequence, the shell 202 is uniformly fixed at two ends of one side inside the shell 4, one end inside the shell 202 is fixed with the first motor 201, the model of the first motor 201 can be Y315M-2, the output end of the first motor 201 is fixed with the first fan 203, and the heating tube 204 is fixed between the inner walls of two sides of the shell 202 above the first fan 203;

eight groups of the shells 202 are arranged, and the shells 202 are symmetrical with each other about the horizontal center line of the shell 4;

specifically, as shown in fig. 1, when the board is driven into the casing 4 and passes through the heating mechanism 2, the first motor 201 drives the first fan 203 to send the heat emitted from the heating tube 204 to the board surface through the through hole on the surface of the casing 202, and hot air is blown to the upper and lower surfaces of the board, so that the solder paste can be rapidly melted;

a third motor 6 is installed on the other side of the bottom end in the shell 4, the type of the third motor 6 can be Y315M-2, a second fan 7 is fixed at the output end of the third motor 6, and a transmission mechanism 5 penetrates through the shell 4;

a driven rotating roller 501, a driving rotating roller 502, a conveyor belt 503, a second motor 504 and a driving shaft 505 are sequentially arranged in the transmission mechanism 5, the driven rotating roller 501 is rotatably connected to the middle position of one side of the shell 4 through a support, the second motor 504 is fixed at one end of the other side of the shell 4 through a support, the type of the second motor 504 can be Y315M-2, the driving shaft 505 is fixed at the output end of the second motor 504, the driving rotating roller 502 is sleeved on the outer wall of the driving shaft 505, the conveyor belt 503 is sleeved between two sides of the outer wall of the driving rotating roller 502 at two sides of the outer wall of the driven rotating roller 501, and the conveyor belt 503 penetrates through the interior of the shell 4;

specifically, as shown in fig. 1, fig. 2 and fig. 4, the second motor 504 can drive the driving roller 502 to rotate through the driving shaft 505, and simultaneously the conveyer belt 503 and the driven roller 501 are driven, so as to transport the object on the conveyer belt 503, and a gap is formed between the conveyer belts 503, which is beneficial for the bottom surface of the board to absorb heat;

a limiting base 16 is arranged at the bottom end of one side of the shell 4, a sliding chute 13 is formed in the limiting base 16, sliding blocks 12 are connected to two sides of the interior of the sliding chute 13 in a sliding mode, U-shaped rods 11 are arranged on two sides of the limiting base 16, one side of the bottom end of each U-shaped rod 11 extends to the interior of the sliding chute 13 and is fixed to one side of each sliding block 12, a limiting plate 10 is fixed to one side of the top end of each U-shaped rod 11, and a push-pull mechanism 3 is arranged on one side of the sliding chute 13 in the;

the linkage rod 301, the screw rod 302, the first bevel gear 303, the second bevel gear 304, the rotating rod 305, the crank 306 and the threaded slider 307 are sequentially arranged inside the push-pull mechanism 3, the screw rod 302 is rotatably connected inside the limiting base 16 on one side of the slider 12, the first bevel gear 303 is fixed on one side of the screw rod 302, the threaded slider 307 is sleeved on the outer wall of the screw rod 302, the linkage rod 301 is hinged to two ends of the threaded slider 307, one end of the linkage rod 301 is hinged inside the slider 12, the crank 306 is arranged at one end of the other side of the limiting base 16, the rotating rod 305 is transversely installed at one end of the crank 306, and the second bevel gear 304 is fixed inside the limiting base 16 and extends to one end of the rotating rod 305;

the first bevel gear 303 is meshed with the second bevel gear 304, and the size of the first bevel gear 303 is the same as that of the second bevel gear 304;

specifically, as shown in fig. 1, 5 and 6, the rotating crank 306 is rotated to drive the rotating rod 305 to rotate the second bevel gear 304, the first bevel gear 303 is driven to rotate the lead screw 302, so that the threaded slider 307 moves up and down on the lead screw 302, the distance between the limiting plates 10 can be adjusted, and the precise placement function of the device is realized;

an air pump 9 is fixed at the middle position of the top end of the shell 4, the type of the air pump 9 can be SB600.3, an air supply pipe 1 is fixed at one side of the air pump 9, the inner walls of two sides of the bottom end of the air supply pipe 1 are hinged with a rotating plate 14, two ends of the inside of the air supply pipe 1 above the rotating plate 14 are fixed with baffle plates 15, an air exhaust cover 8 is fixed at the other side of the air pump 9 through a pipeline, and the top end of the air exhaust cover 8 extends to the top of the second fan 7 inside the shell 4.

The working principle is as follows: when the device is used, firstly, the crank 306 is rotated to drive the rotating rod 305 to rotate the second bevel gear 304, the first bevel gear 303 is driven to rotate the screw rod 302, the threaded sliding block 307 moves up and down on the screw rod 302, then the linkage rod 301 is utilized to move the sliding block 12 in the sliding groove 13, and meanwhile, the distance between the limiting plates 10 is adjusted to the width of a plate needing reflow soldering by driving the U-shaped rod 11 to move.

Then, the second motor 504 is started, the second motor 504 drives the driving rotary roller 502 to rotate through the driving shaft 505, meanwhile, the conveying belt 503 and the driven rotary roller 501 are driven to achieve the purpose of transmission, a board is placed on the driven rotary roller 501 between the limiting plates 10, when the board is driven to enter the shell 4 and pass through the heating mechanism 2, the first motor 201 drives the first fan 203 to send heat emitted by the heating pipe 204 to the board surface through the through hole in the surface of the shell 202, gaps are reserved between the conveying belts 503 and on the outer side, two ends of the board can be heated to melt solder paste, the board is continuously sent to the right side of the device through the conveying belt 503, the third motor 6 drives the second fan 7 to blow cold air to the board, and the heat on the surface of the board is blown away to cool the soldered solder paste until the board is sent out of the device through the conveying belt.

Finally, the heat blown away by the second fan 7 is absorbed by the air extraction cover 8 driven by the air extraction pump 9 and is conveyed into the shell 4 through the air supply pipe 1, when hot air enters the shell 4 from the air supply pipe 1, the rotating plate 14 is pushed to rotate away to form a gap so that the hot air passes through, and when the hot air of the shell 4 escapes through the air supply pipe 1, the baffle 15 blocks the rotating angle of the rotating plate 14 so that the gap cannot be formed, and the heat loss is prevented.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (6)

1. The utility model provides a reflow oven is used in PCB board processing of heat circulation, includes air feed pipe (1), casing (4) and aspiration pump (9), its characterized in that: the heating mechanism (2) is uniformly arranged at two ends of one side in the shell (4), the third motor (6) is arranged at the other side of the bottom end in the shell (4), the second fan (7) is fixed at the output end of the third motor (6), the transmission mechanism (5) penetrates through the shell (4), the limiting base (16) is arranged at the bottom end of one side of the shell (4), the sliding groove (13) is formed in the limiting base (16), the sliding blocks (12) are connected to two sides in the sliding groove (13) in a sliding mode, the U-shaped rod (11) is arranged on two sides of the limiting base (16), one side of the bottom end of the U-shaped rod (11) extends to the inside of the sliding groove (13) and is fixed to one side of the sliding blocks (12), the limiting plate (10) is fixed to one side of the top end of the U-shaped rod (11), and the push-pull mechanism (3) is arranged on one side of the sliding groove (, the utility model discloses a fan, including casing (4), shell (4), the intermediate position on top is fixed with aspiration pump (9), and one side of aspiration pump (9) is fixed with air feed pipe (1), the inner wall of air feed pipe (1) bottom both sides all articulates there is commentaries on classics board (14), and changes the both ends of board (14) top air feed pipe (1) inside and all be fixed with baffle (15), the opposite side of aspiration pump (9) is fixed with exhaust hood (8) through the pipeline, and the top of exhaust hood (8) extends to the top of the inside second fan (7) of casing (4).

2. The reflow oven for PCB processing with heat circulation of claim 1, wherein: the inside of heating mechanism (2) has set gradually first motor (201), shell (202), first fan (203) and heating tube (204), shell (202) evenly is fixed in the both ends of the inside one side of casing (4), and the inside one end of shell (202) all is fixed with first motor (201), the output of first motor (201) all is fixed with first fan (203), and all is fixed with heating tube (204) between the inner wall of first fan (203) top shell (202) both sides.

3. The reflow oven for PCB processing of claim 2, wherein: eight groups of shells (202) are arranged, and every two shells (202) are symmetrical relative to the horizontal center line of the shell (4).

4. The reflow oven for PCB processing with heat circulation of claim 1, wherein: the inside of the push-pull mechanism (3) is sequentially provided with a linkage rod (301), a screw rod (302), a first bevel gear (303), a second bevel gear (304), a rotating rod (305), a crank (306) and a threaded slider (307), the screw rod (302) is rotationally connected with the inside of the limit base (16) at one side of the sliding block (12), a first bevel gear (303) is fixed on one side of the screw rod (302), a threaded sliding block (307) is sleeved on the outer wall of the screw rod (302), and both ends of the threaded sliding block (307) are hinged with a linkage rod (301), one end of the linkage rod (301) is hinged inside the sliding block (12), a crank (306) is arranged at one end of the other side of the limit base (16), and one end of the crank (306) is transversely provided with a rotating rod (305), and one end of the rotating rod (305) extends to the inside of the limiting base (16) and is fixed with a second bevel gear (304).

5. The reflow oven for PCB processing of claim 4, wherein: the first bevel gear (303) is meshed with the second bevel gear (304), and the size of the first bevel gear (303) is the same as that of the second bevel gear (304).

6. The reflow oven for PCB processing with heat circulation of claim 1, wherein: the inside of transmission device (5) has set gradually driven roller (501), initiative and has changeed roller (502), conveyer belt (503), second motor (504) and drive shaft (505), driven roller (501) are connected in the intermediate position department of casing (4) one side through the support rotation, and the one end of casing (4) opposite side is fixed with second motor (504) through the support, the output of second motor (504) is fixed with drive shaft (505), and the outer wall cover of drive shaft (505) is equipped with initiative and changes roller (502), all the cover is equipped with conveyer belt (503) between the both sides of driven roller (501) outer wall initiative roller (502) outer wall that changes, and conveyer belt (503) run through in the inside of casing (4).

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