CN117182240A - Double-door nitrogen-saving device for inlet and outlet end channels of reflow furnace - Google Patents
Double-door nitrogen-saving device for inlet and outlet end channels of reflow furnace Download PDFInfo
- Publication number
- CN117182240A CN117182240A CN202210616106.9A CN202210616106A CN117182240A CN 117182240 A CN117182240 A CN 117182240A CN 202210616106 A CN202210616106 A CN 202210616106A CN 117182240 A CN117182240 A CN 117182240A
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- door
- reflow oven
- inlet
- nitrogen
- channel
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- 238000004891 communication Methods 0.000 claims abstract description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 38
- 229910052757 nitrogen Inorganic materials 0.000 claims description 19
- 230000007246 mechanism Effects 0.000 claims description 12
- 230000000903 blocking effect Effects 0.000 claims description 10
- 238000007789 sealing Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 abstract description 11
- 239000000969 carrier Substances 0.000 abstract description 10
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000012299 nitrogen atmosphere Substances 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000012298 atmosphere Substances 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000009469 supplementation Effects 0.000 description 1
Abstract
The application relates to a double-door nitrogen-saving device for an inlet and outlet end channel of a reflow oven, which is arranged at an inlet channel or an outlet channel of the reflow oven, a carrier carrying a PCB (printed Circuit Board) enters and exits the reflow oven through the inlet channel and the outlet channel respectively, the double-door nitrogen-saving device comprises an air draft device, a first door, a second door and a buffer bin, the buffer bin is arranged at the inlet channel or the outlet channel of the reflow oven, the first door and the second door are respectively arranged at the inlet and the outlet of the buffer bin, the opening and closing of the first door controls the communication between the inlet channel or the outlet channel of the reflow oven and the buffer bin, the opening and closing of the second door controls the communication between the hearth of the reflow oven and the buffer bin, the air draft device is connected into the inlet channel or the outlet channel of the reflow oven, and the connection position is arranged at the outer side of the buffer bin and close to the first door. Compared with the prior art, the application has the advantages of meeting the process requirements of carriers with various sizes, improving the productivity, saving energy, reducing emission and the like.
Description
Technical Field
The application relates to the technical field of reflow ovens, in particular to a double-door nitrogen-saving device for an inlet and outlet end channel of a reflow oven.
Background
Reflow ovens are devices that allow surface mounted components and circuit boards to be reliably bonded together by a solder paste alloy by providing a heated environment that causes the solder paste to melt under heat.
With the development of the semiconductor related industry and optimization of the process, reflow oven applications are not limited to surface mount processes alone, but are expanding toward processes that meet any need for temperature-time control. The customer's needs are becoming increasingly diverse and not the SMT process of a single PCB board. In order to improve the productivity and adapt to the process flow of the whole production line, a plurality of products are placed in a carrier, so that the application requirement of the carrier for the whole carrier to pass through a reflow oven is gradually revealed. Generally, the size of the carrier in the thickness direction is far greater than the thickness of a traditional PCB, so that the passing clearance of the hearth is required to be greatly improved. The existing reflow oven has lower hearth clear height, smaller size of the inlet and outlet channels and balanced nitrogen atmosphere in the hearth under the condition of economic and reasonable nitrogen consumption. The net height of the hearth is greatly improved, and the balance is necessarily broken. Under the condition of the same nitrogen consumption, the oxygen concentration in the hearth is high, and the process requirements cannot be met. If the oxygen concentration is to be reduced to meet the process requirements, a large amount of nitrogen replenishment is required to achieve a new balance, and thus the nitrogen consumption cost is greatly increased. In addition, a large amount of low-temperature nitrogen is supplemented to the hearth, and the hearth needs to be heated to a set temperature, so that the stable energy consumption of the reflow oven can be increased.
Disclosure of Invention
The application aims to overcome the defects in the prior art and provide the double-door nitrogen-saving device for the inlet and outlet end channels of the reflow oven, which meets the process requirements of carriers with various sizes, improves the productivity, saves energy and reduces emission.
The aim of the application can be achieved by the following technical scheme:
the device is arranged at an inlet channel or an outlet channel of the reflow oven, a carrier carrying a PCB (printed circuit board) enters and exits the reflow oven through the inlet channel and the outlet channel respectively, and the device comprises an air draft device, a first door, a second door and a buffer bin; the buffer bin is arranged at an inlet channel or an outlet channel of the reflow oven; the first door and the second door are respectively arranged at the inlet and the outlet of the buffer bin; the opening and closing of the first door controls the communication between an inlet channel or an outlet channel of the reflow oven and the surge bin; the opening and closing of the second door controls the communication between the interior of the hearth of the reflow oven and the buffer bin; the air draft device is connected into an inlet channel or an outlet channel of the reflow oven, and the connection position is arranged at the outer side of the buffer bin and close to the first door.
As an optimal technical scheme, the double-door nitrogen-saving device is provided with nitrogen charging equipment, and the device is connected into the buffer bin.
As an optimal technical scheme, the double-door nitrogen-saving device is provided with a carrier blocking rod at the first door, wherein the carrier blocking rod is used for controlling a carrier to enter the buffer bin from an inlet channel of the reflow oven and enter an outlet channel of the reflow oven from the buffer bin.
As the preferable technical scheme, the first door, the second door and the carrier blocking rod respectively provide power through an external power mechanism.
As a preferable technical scheme, the external power mechanism is a reciprocating cylinder.
As the preferable technical scheme, the double-door nitrogen-saving device is provided with a supporting mechanism, and comprises a bottom plate, side plates, a top plate and a door frame; the bottom plate is arranged at the top of the inlet channel or the outlet channel of the reflow oven; the side plates are arranged on the bottom plate; the top plate is arranged on the side plate; the door frame is fixed on the top plate; the external power mechanism is fixed on the door frame and drives the first door and the second door to reciprocate along the door frame; the air draft device is fixed on the side plate.
As an optimal technical scheme, the door frame is provided with a guide groove; the first door and the second door are both in sliding connection with the guide groove.
As an optimal technical scheme, the double-door nitrogen-saving device is provided with a sealing ring at the joint of the first door and the inlet channel or the outlet channel of the reflow oven.
As an optimal technical scheme, the double-door nitrogen-saving device is provided with a sealing ring at the joint of the second door and the inlet channel or the outlet channel of the reflow oven.
As an optimized technical scheme, the two-door nitrogen-saving device is provided with a first in-place sensor and a second in-place sensor which are used for detecting whether the carrier is in place or not respectively at the first door and the second door.
Compared with the prior art, the application has the following beneficial effects:
1. meets the process requirements of carriers with various sizes and improves the productivity: according to the double-door nitrogen-saving device for the inlet and outlet end channels of the reflow oven, the buffer bin is arranged at the inlet and outlet channels of the reflow oven, so that the influence of the inlet and outlet channels on the nitrogen atmosphere in the hearth is greatly reduced, the passing clearance of the reflow oven is greatly increased, the production process requirement of a large height and size of a client carrier is met, the application scene of the reflow oven is expanded, and the production capacity of the client is also greatly improved.
2. The nitrogen consumption is reduced, and the production cost is reduced: according to the double-door nitrogen-saving device for the inlet and outlet end channels of the reflow furnace, the buffer bin is arranged, and meanwhile, the air draft equipment is continuously opened, so that the influence of the inlet and outlet channels on the nitrogen atmosphere in the hearth is greatly reduced, the new balance is achieved by less nitrogen supplementation, the consumption of nitrogen is reduced, and the production cost is effectively reduced.
3. The energy consumption of the reflow oven is reduced, and the energy conservation and the emission reduction are realized: the double-door nitrogen-saving device for the inlet and outlet end channels of the reflow oven provided by the application is supplemented with smaller nitrogen, so that a large amount of low-temperature nitrogen is prevented from being filled into the hearth, the stable energy consumption of the system is reduced by the reflow oven, and the energy conservation and emission reduction are realized.
Drawings
FIG. 1 is a schematic diagram of a two-door nitrogen-saving device for an inlet and outlet end channel of a reflow oven in an embodiment of the application;
FIG. 2 is a schematic view of a two-door nitrogen-saving apparatus installed at an inlet channel of a reflow oven according to an embodiment of the present application;
FIG. 3 is a schematic view showing a structure in which a double gate nitrogen-saving apparatus is installed at an outlet passage of a reflow oven according to an embodiment of the present application.
The reference numerals in the figures indicate:
1. the device comprises a bottom plate, 2, side plates, 3, a top plate, 4, an air draft device, 5, a door frame, 6, a first door, 7, a second door, 8, a guide groove, 9, a sealing strip, 10, a carrier blocking rod, 11, a first reciprocating cylinder, 12, a second reciprocating cylinder, 13, a nitrogen charging device, 14, a first in-place sensor, 15, a second in-place sensor, 16 and a buffer bin.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, shall fall within the scope of the present application.
Reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic may be included in at least one implementation of the application. In the description of the present application, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "top", "bottom", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may include one or more of the feature, either explicitly or implicitly. Moreover, the terms "first," "second," and the like, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the application described herein may be implemented in sequences other than those illustrated or otherwise described herein.
The device is arranged at an inlet channel or an outlet channel of a reflow oven, as shown in fig. 2 and 3, a carrier loaded with a PCB (printed circuit board) enters and exits the reflow oven through the inlet channel and the outlet channel respectively, the device comprises an air draft device 4, a first door 6, a second door 7 and a buffer bin 16, the buffer bin 16 is arranged at the inlet channel or the outlet channel of the reflow oven, the first door 6 and the second door 7 are respectively arranged at the inlet and the outlet of the buffer bin 16, the opening and closing of the first door 6 controls the communication between the inlet channel or the outlet channel of the reflow oven and the buffer bin 16, the opening and closing of the second door 7 controls the communication between the interior of a hearth of the reflow oven and the buffer bin 16, the air draft device 4 is connected into the inlet channel or the outlet channel of the reflow oven, and the access position is arranged at the outer side of the buffer bin 16 and close to the first door 6.
Specifically, the double-door nitrogen-saving device is provided with a nitrogen charging device 13, and the device is connected to a surge bin 16.
Specifically, the dual gate nitrogen economizer is provided with a carrier blocking bar 10 at gate number 6 for controlling the carrier to enter surge bin 16 from the reflow oven inlet passage and enter the reflow oven outlet passage from surge bin 16.
Alternatively, the first door 6, the second door 7, and the carrier blocking bar 10 are powered by external power mechanisms, respectively.
Optionally, the external power mechanism is a reciprocating cylinder.
Optionally, the double-door nitrogen-saving device is provided with a supporting mechanism, and comprises a bottom plate 1, a side plate 2, a top plate 3 and a door frame 5, wherein the bottom plate 1 is arranged at the top of an inlet channel or an outlet channel of the reflow oven, the side plate 2 is arranged on the bottom plate 1, the top plate 2 is arranged on the side plate 2, the door frame 5 is fixed on the top plate 3, an external power mechanism is fixed on the door frame 5, and drives a first door 6 and a second door 7 to reciprocate along the door frame 5, and the air draft device 4 is fixed on the side plate 2.
Optionally, the door frame 5 is provided with a guide groove 8, and the first door 6 and the second door 7 are both in sliding connection with the guide groove 8.
Specifically, the double-door nitrogen-saving device is provided with a sealing ring 9 at the joint of the first door 6 and the inlet channel or the outlet channel of the reflow oven.
Specifically, the double-door nitrogen-saving device is provided with a sealing ring 9 at the joint of the second door 7 and the inlet channel or the outlet channel of the reflow oven.
Specifically, the two-door nitrogen-saving device is provided with a first in-place sensor 14 and a second in-place sensor 15 for detecting whether the carrier is in place at the first door 6 and the second door 7 respectively.
The working principle of the double-door nitrogen-saving device is as follows:
the first in-place sensor 14 senses that the carriers reach the preset position, if the inlet ends of the carriers entering the reflow oven are not level, the carriers with the front positions blocked by the carrier blocking rods 10 are blocked until the carriers reach the blocking rod positions at the same time, the carriers are ready to enter the hearth, the first reciprocating cylinder 11 acts, the first door 6 is lifted, the carriers enter the buffer chamber 16, and the nitrogen charging equipment 13 is started to supplement nitrogen. The second in-place sensor 15 senses that the carrier reaches a preset position, the first reciprocating cylinder 11 acts, the first door 6 falls down, the nitrogen charging device 13 is closed, and at the moment, the inside of the sealed buffer chamber 16 is in a nitrogen atmosphere with lower oxygen concentration. Then the second reciprocating cylinder 12 acts, the second door 7 is lifted, the nitrogen atmosphere of the buffer chamber has little influence on the atmosphere balance in the hearth, the carrier passes through the second door 7 to enter the hearth, and the second door 7 falls down when the carrier completely passes through. Wait for the first in-place sensor 14 to sense the next set of carriers to reach the preset position and enter the next duty cycle. In the whole process, the air draft device 4 is continuously opened, part of air is continuously pumped away, the air flow of the whole door structure is ensured to be in an outward trend, and the influence of the external environment on the atmosphere balance of the reflow oven is reduced.
The implementation of the outlet end scheme is the same as the working principle of the inlet end, and the difference is only that the carrier sequentially passes through the two doors from the interior of the hearth to reach the outlet channel.
While the application has been described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes and substitutions of equivalents may be made and equivalents will be apparent to those skilled in the art without departing from the scope of the application. Therefore, the protection scope of the application is subject to the protection scope of the claims.
Claims (10)
1. The double-door nitrogen-saving device for the inlet and outlet end channels of the reflow oven is arranged at the inlet channel or the outlet channel of the reflow oven, and a carrier carrying a PCB (printed circuit board) enters and exits the reflow oven through the inlet channel and the outlet channel respectively, and is characterized by comprising an air draft device (4), a first door (6), a second door (7) and a buffer bin (16); the buffer bin (16) is arranged at an inlet channel or an outlet channel of the reflow oven; the first door (6) and the second door (7) are respectively arranged at the inlet and the outlet of the buffer bin (16); the opening and closing of the first door (6) controls the communication between an inlet channel or an outlet channel of the reflow oven and the buffer bin (16); the opening and closing of the second door (7) controls the communication between the interior of the hearth of the reflow oven and the surge bin (16); the air draft device (4) is connected into an inlet channel or an outlet channel of the reflow oven, and the connection position is arranged at the outer side of the buffer bin (16) and close to the first door (6).
2. The double-door nitrogen-saving device for the inlet and outlet end channels of the reflow oven according to claim 1, wherein the double-door nitrogen-saving device is provided with nitrogen charging equipment (13) which is connected with a buffer bin (16).
3. The double-door nitrogen-saving device for the inlet and outlet end channels of the reflow oven according to claim 1, wherein the double-door nitrogen-saving device is provided with a carrier blocking rod (10) at a first door (6) for controlling a carrier to enter a buffer bin (16) from the inlet channel of the reflow oven and enter the outlet channel of the reflow oven from the buffer bin (16).
4. The nitrogen-saving device for the inlet and outlet end channels of the reflow oven according to claim 3, wherein the first door (6), the second door (7) and the carrier blocking rod (10) are respectively powered by an external power mechanism.
5. The device for saving nitrogen in two-door inlet and outlet channels of a reflow oven according to claim 4, wherein the external power mechanism is a reciprocating cylinder.
6. The double-door nitrogen-saving device for the inlet and outlet end channels of the reflow oven according to claim 4, wherein the double-door nitrogen-saving device is provided with a supporting mechanism, and comprises a bottom plate (1), side plates (2), a top plate (3) and a door frame (5); the bottom plate (1) is arranged at the top of an inlet channel or an outlet channel of the reflow oven; the side plates (2) are arranged on the bottom plate (1); the top plate (2) is arranged on the side plate (2); the door frame (5) is fixed on the top plate (3); the external power mechanism is fixed on the door frame (5) and drives the first door (6) and the second door (7) to reciprocate along the door frame (5); the air draft device (4) is fixed on the side plate (2).
7. The double-door nitrogen-saving device for the inlet and outlet end channels of the reflow oven according to claim 6, wherein the door frame (5) is provided with a guide groove (8); the first door (6) and the second door (7) are both in sliding connection with the guide groove (8).
8. The double-door nitrogen-saving device for the inlet and outlet end channels of the reflow oven according to claim 1, wherein a sealing ring (9) is arranged at the joint of the first door (6) and the inlet channel or the outlet channel of the reflow oven.
9. The double-door nitrogen-saving device for the inlet and outlet end channels of the reflow oven according to claim 1, wherein a sealing ring (9) is arranged at the joint of the second door (7) and the inlet channel or the outlet channel of the reflow oven.
10. The double-door nitrogen-saving device for the inlet and outlet end channels of the reflow oven according to claim 1, wherein a first in-place sensor (14) and a second in-place sensor (15) for detecting whether a carrier is in place are respectively arranged on a first door (6) and a second door (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210616106.9A CN117182240A (en) | 2022-05-31 | 2022-05-31 | Double-door nitrogen-saving device for inlet and outlet end channels of reflow furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210616106.9A CN117182240A (en) | 2022-05-31 | 2022-05-31 | Double-door nitrogen-saving device for inlet and outlet end channels of reflow furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117182240A true CN117182240A (en) | 2023-12-08 |
Family
ID=89004029
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210616106.9A Pending CN117182240A (en) | 2022-05-31 | 2022-05-31 | Double-door nitrogen-saving device for inlet and outlet end channels of reflow furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117182240A (en) |
-
2022
- 2022-05-31 CN CN202210616106.9A patent/CN117182240A/en active Pending
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