A circulating air mechanism for bell-type sintering furnace

Abstract

The utility model relates to bell jar type sintering furnace technical field especially, a kind of circulating air mechanism for bell jar type sintering furnace, including furnace body, the furnace door of rotation installation at the front end of furnace body, the heat insulation layer filled in furnace body inside, the heat preservation layer filled in heat insulation layer inside, the multiple heating resistance wires of symmetry installation in heat preservation layer inside left and right sides and the material rack of activity installation in furnace body inside. In the utility model, the original bell jar type sintering furnace structure is improved scientifically and rationally, circulating air box, air inlet pipe, air outlet pipe, communication pipe, air inlet, electronic air valve, internal circulation air pipe and two air valves are arranged outside the furnace body, the rapid uniform temperature or rapid cooling treatment in the furnace body can be carried out, effectively reduce the problems such as warping, bending, fragmentation and low strength of ceramic material due to uneven temperature distribution and low cooling rate, so as to improve the yield and stability of ceramic material after sintering processing.

Description

Technical Field

[0001] This utility model relates to the field of bell-type sintering furnace technology, and in particular to a circulating air mechanism for a bell-type sintering furnace. Background Technology

[0002] Bell-type sintering furnaces, as an important type of industrial kiln, are widely used in the manufacturing process of electronic components. Their unique design provides a stable sintering environment, meeting the manufacturing needs of high-end, intelligent surface-mount electronic components.

[0003] Currently, when using bell-type sintering furnaces to heat ceramic materials, the ceramic materials are quite sensitive to temperature. In actual use, there will be a certain temperature difference between the upper and lower halves of the furnace body. At the same time, the cooling of ceramic materials after heating is mainly done by air cooling. Uneven temperature distribution and substandard cooling rate can easily lead to problems such as edge warping, bending, cracking, and low strength in ceramic materials.

[0004] In view of this, it is particularly important to design and manufacture a circulating air mechanism that can achieve uniform temperature distribution inside the furnace and rapid cooling, and to apply it to bell-type sintering furnaces. Utility Model Content

[0005] The purpose of this utility model is to solve the problem that traditional bell-type sintering furnaces are prone to temperature differences inside the furnace body and cannot quickly cool down ceramic materials, which easily leads to an increase in the defect rate of ceramic materials after processing. Therefore, a circulating air mechanism for bell-type sintering furnaces is proposed.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A circulating air mechanism for a bell-shaped sintering furnace includes a furnace body, a furnace door rotatably mounted at the front end of the furnace body, a heat insulation layer filled inside the furnace body, a heat preservation layer filled inside the heat insulation layer, multiple heating resistance wires symmetrically mounted on the left and right sides inside the heat preservation layer, and a material rack movably mounted inside the furnace body. The furnace body is provided with a circulating air mechanism for rapid temperature uniformity or rapid cooling inside the furnace body.

[0008] As a further description of the above technical solution:

[0009] The circulating air mechanism includes a circulating air box installed at the lower end of the furnace body, an air inlet pipe connecting the upper end of the circulating air box and the lower end of the furnace body, an air outlet pipe connecting the upper end of the furnace body, a connecting pipe connecting the left end of the air outlet pipe and the left end of the circulating air box, an air inlet at the front end of the connecting pipe, an electronic air valve installed outside the air inlet, an air valve section set between the air outlet pipe and the connecting pipe, and an internal circulating air pipe symmetrically connected between the front and rear sides of the left and right ends of the furnace body.

[0010] As a further description of the above technical solution:

[0011] A fan is installed at the right end of the circulating air box, and blades are installed at the left end of the fan inside the circulating air box.

[0012] As a further description of the above technical solution:

[0013] The air valve section includes a first motor installed on the upper side of the front end of the air outlet pipe, a first air valve plate installed on the rear end of the first motor and located inside the air outlet pipe, a second motor installed on the upper side of the front end of the connecting pipe, and a second air valve plate installed on the rear end of the second motor and located inside the connecting pipe.

[0014] As a further description of the above technical solution:

[0015] A first temperature sensor is installed inside the air inlet duct, and a second temperature sensor is installed inside the air outlet duct.

[0016] As a further description of the above technical solution:

[0017] A microcomputer controller is installed on the outside of the furnace door. The outputs of the first temperature sensor and the second temperature sensor are electrically connected to the input terminal of the microcomputer controller. The output terminal of the microcomputer controller is electrically connected to the input terminals of the heating resistance wire, the fan, the first motor, the second motor, and the electronic air valve, respectively.

[0018] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0019] In this invention, the original bell-shaped sintering furnace structure has been scientifically and rationally improved. A circulating air box, air inlet pipe, air outlet pipe, connecting pipe, air inlet, electronic air valve, internal circulating air pipe, and two air valves are installed outside the furnace body. When the first air valve plate is closed, the second air valve plate is open, the fan is working, and the electronic air valve is closed, an airflow from bottom to top is generated inside the furnace. Under the action of the airflow, the hot air inside the furnace circulates between the air inlet pipe, air outlet pipe, connecting pipe, and circulating air box, making the temperature distribution of the upper and lower layers of the furnace body more uniform. When the first air valve plate... When the furnace is opened, the second air valve is closed, the fan is running, and the electronic air valve is open, outside air can be drawn into the connecting pipe through the air inlet and enter the furnace body through the circulating air box. The hot air inside the furnace is then sent upward through the air outlet pipe to quickly cool the ceramic materials on the material rack. This structure can quickly and evenly cool or rapidly cool the inside of the furnace, effectively reducing problems such as edge warping, bending, cracking, and low strength of ceramic materials caused by uneven temperature distribution and low cooling rate, thereby improving the yield and stability of ceramic materials after sintering. Attached Figure Description

[0020] Figure 1 This is a simplified structural diagram of a circulating air mechanism for a bell-shaped sintering furnace proposed in this utility model;

[0021] Figure 2 This is a schematic diagram of the internal structure of this utility model.

[0022] Legend:

[0023] 1. Furnace body; 101. Furnace door; 102. Insulation layer; 103. Heat preservation layer; 104. Heating resistance wire; 2. Circulating air box; 201. Fan; 202. Blade; 3. Air inlet pipe; 4. Air outlet pipe; 5. Connecting pipe; 501. Air inlet; 6. Internal circulation air pipe; 7. First motor; 701. First air valve plate; 8. Second motor; 801. Second air valve plate; 9. First temperature sensor; 10. Second temperature sensor; 11. Material rack; 12. Electronic air valve; 13. Microcomputer controller. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1 and Figure 2 This utility model provides a technical solution: a circulating air mechanism for a bell-shaped sintering furnace, including a furnace body 1, a furnace door 101 rotatably installed at the front end of the furnace body 1, a heat insulation layer 102 filled inside the furnace body 1, a heat insulation layer 103 filled inside the heat insulation layer 102, a plurality of heating resistance wires 104 symmetrically installed on the left and right sides inside the heat insulation layer 103, and a material rack 11 movably installed inside the furnace body 1. The furnace body 1 is provided with a circulating air mechanism for rapid temperature uniformity or rapid cooling inside the furnace body 1.

[0026] Specifically, such as Figure 1 and Figure 2 As shown, the circulating air mechanism includes a circulating air box 2 installed at the lower end of the furnace body 1, an air inlet pipe 3 connecting the upper end of the circulating air box 2 and the lower end of the furnace body 1, an air outlet pipe 4 connecting the upper end of the furnace body 1, a connecting pipe 5 connecting the left end of the air outlet pipe 4 and the left end of the circulating air box 2, an air inlet 501 opened at the front end of the connecting pipe 5, an electronic air valve 12 installed outside the air inlet 501, an air valve part set between the air outlet pipe 4 and the connecting pipe 5, and an internal circulating air pipe 6 symmetrically connected between the left and right ends and the front and rear sides of the furnace body 1.

[0027] The right end of the circulating air box 2 is equipped with a fan 201, and the left end of the fan 201 is equipped with blades 202 located inside the circulating air box 2. When the fan 201 is powered on, it can drive the blades 202 to rotate, thereby drawing the air from the connecting pipe 5 into the circulating air box 2 and blowing the air in the circulating air box 2 into the furnace body 1 through the air inlet pipe 3, so that the furnace body 1 generates an airflow from bottom to top, thereby achieving uniform temperature and rapid heat dissipation in the later stage.

[0028] The air valve section includes a first motor 7 installed on the upper side of the front end of the air outlet pipe 4, a first air valve plate 701 installed on the rear end of the first motor 7 and located inside the air outlet pipe 4, a second motor 8 installed on the upper side of the front end of the connecting pipe 5, and a second air valve plate 801 installed on the rear end of the second motor 8 and located inside the connecting pipe 5. When the first motor 7 is working, it can drive the first air valve plate 701 to rotate, thereby realizing the opening and closing operation of the air outlet pipe 4. When the second motor 8 is working, it can drive the second air valve plate 801 to rotate, thereby realizing the opening and closing operation of the connecting pipe 5.

[0029] In addition, a first temperature sensor 9 is installed inside the air inlet duct 3, which can collect the temperature data inside the air inlet duct 3 in real time and transmit the temperature data to the microcomputer controller 13 for calculation, comparison and analysis. A second temperature sensor 10 is installed inside the air outlet duct 4, which can collect the temperature data inside the air outlet duct 4 in real time and transmit the temperature data to the microcomputer controller 13 for calculation, comparison and analysis.

[0030] A microcomputer controller 13 is installed on the outside of the furnace door 101, which facilitates the operator to set and adjust the working parameters of the sintering furnace. At the same time, it can realize the automated control operation of the heating resistance wire 104, the fan 201, the first motor 7, the second motor 8 and the electronic air valve 12 based on the temperature data input by the first temperature sensor 9 and the second temperature sensor 10. The outputs of the first temperature sensor 9 and the second temperature sensor 10 are electrically connected to the input terminal of the microcomputer controller 13. The output terminal of the microcomputer controller 13 is electrically connected to the input terminal of the heating resistance wire 104, the fan 201, the first motor 7, the second motor 8 and the electronic air valve 12 respectively.

[0031] Working Principle: During use, after the material rack 11 containing ceramic material is pushed into the furnace body 1, various working parameters of the sintering furnace can be adjusted and set through the microcomputer controller 13. During actual heating, the heating resistance wire 104 is energized to heat the material rack 11 inside the furnace body 1. Simultaneously, when the first air valve plate 701 is closed, the second air valve plate 801 is open, the fan 201 is working, and the electronic air valve 12 is closed, an airflow from bottom to top is generated inside the furnace body 1. Under the action of the airflow, the hot air inside the furnace body 1 circulates between the furnace body 1, the air outlet pipe 4, the connecting pipe 5, the circulating air box 2, and the air inlet pipe 3, making the temperature distribution of the upper and lower layers of the furnace body 1 more uniform. The ceramic material is subjected to constant temperature heating treatment. When the ceramic material needs to be cooled, the microcomputer controller 13 can control the first air valve plate 701 to be in the open state, the second air valve plate 801 to be in the closed state, the fan 201 to work, and the electronic air valve 12 to be in the open state. At this time, the air outlet pipe 4 will be opened and the connecting pipe 5 will be in the closed state. The outside air can be drawn into the connecting pipe 5 through the air inlet 501 on the connecting pipe 5, and enter the furnace body 1 through the circulating air box 2. The hot air in the furnace body 1 is sent upward through the air outlet pipe 4 to quickly cool down the ceramic material on the material rack 11. After the cooling is completed, the furnace door 101 can be opened and the material rack 11 containing the ceramic material can be slid out of the furnace body 1.

[0032] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A circulating air mechanism for a bell-type sintering furnace, comprising a furnace body (1), a furnace door (101) rotatably mounted at the front end of the furnace body (1), a heat insulation layer (102) filled inside the furnace body (1), a heat insulation layer (103) filled inside the heat insulation layer (102), a plurality of heating resistance wires (104) symmetrically mounted on the left and right sides inside the heat insulation layer (103), and a material rack (11) movably mounted inside the furnace body (1), characterized in that, The furnace body (1) is provided with a circulating air mechanism on the outside for rapid temperature uniformity or rapid cooling inside the furnace body (1).

2. The circulating air mechanism for a bell-type sintering furnace according to claim 1, characterized in that, The circulating air mechanism includes a circulating air box (2) installed at the lower end of the furnace body (1), an air inlet pipe (3) connecting the upper end of the circulating air box (2) and the lower end of the furnace body (1), an air outlet pipe (4) connecting the upper end of the furnace body (1), a connecting pipe (5) connecting the left end of the air outlet pipe (4) and the left end of the circulating air box (2), an air inlet (501) opened at the front end of the connecting pipe (5), an electronic air valve (12) installed outside the air inlet (501), an air valve part set between the air outlet pipe (4) and the connecting pipe (5), and an internal circulating air pipe (6) symmetrically connected between the front and rear sides of the left and right ends of the furnace body (1).

3. The circulating air mechanism for a bell-type sintering furnace according to claim 2, characterized in that, A fan (201) is installed at the right end of the circulating air box (2), and blades (202) are installed at the left end of the fan (201) inside the circulating air box (2).

4. The circulating air mechanism for a bell-type sintering furnace according to claim 2, characterized in that, The air valve section includes a first motor (7) installed on the upper side of the front end of the air outlet pipe (4), a first air valve plate (701) installed on the rear end of the first motor (7) and located inside the air outlet pipe (4), a second motor (8) installed on the upper side of the front end of the connecting pipe (5), and a second air valve plate (801) installed on the rear end of the second motor (8) and located inside the connecting pipe (5).

5. A circulating air mechanism for a bell-type sintering furnace according to claim 2, characterized in that, The air inlet pipe (3) is equipped with a first temperature sensor (9), and the air outlet pipe (4) is equipped with a second temperature sensor (10).

6. The circulating air mechanism for a bell-type sintering furnace according to claim 5, characterized in that, A microcomputer controller (13) is installed on the outside of the furnace door (101). The outputs of the first temperature sensor (9) and the second temperature sensor (10) are electrically connected to the input of the microcomputer controller (13). The output of the microcomputer controller (13) is electrically connected to the input of the heating resistance wire (104), the fan (201), the first motor (7), the second motor (8), and the electronic air valve (12).

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