Double-channel hot air circulation glue exhausting oven

Abstract

This utility model relates to the field of glue removal furnace technology, specifically a dual-channel hot air circulation glue removal furnace. It includes a furnace body and a shell disposed within the furnace body; a first steel plate is fitted around the outer perimeter of the shell, forming a first annular cavity between the first steel plate and the shell; a second steel plate is fitted over the first steel plate, forming a second annular cavity between the second steel plate and the first steel plate; an air inlet pipe is disposed at the top of the furnace body, with its outlet connected to the first annular cavity; a fan is disposed at the top of the second annular cavity, and an air outlet is disposed on the corresponding first steel plate below the fan, connecting the first and second annular cavities through the air outlet; a heating element is disposed at the bottom of the second annular cavity; an exhaust pipe is disposed on the side wall of the second annular cavity; guide plates are fixedly disposed on both sides of the shell, with guide holes formed on the guide plates. Through the above technical solution, this utility model solves the problems of poor temperature uniformity and poor glue removal effect.

Description

Technical Field

[0001] This utility model relates to the field of glue removal furnace technology, specifically a dual-channel hot air circulation glue removal furnace. Background Technology

[0002] In the material preparation process of ceramics, powder metallurgy and other fields, the debinding process is a key step to ensure the quality of subsequent sintering. Its core is to remove the organic binder contained in the green body by heating, so as to avoid residual impurities that cause defects such as product cracking and porosity.

[0003] In existing debinding furnaces, the air intake is from the bottom and the exhaust is from the top, meaning the gas enters from the bottom and exits carrying waste glue from the top. The agitator is typically located on the side, and its blades only agitate the gas in a localized area, failing to create efficient circulation throughout the entire furnace. This leads to the accumulation of waste glue-laden gas at dead spots due to poor exhaust, and the inability to circulate the gas effectively results in significant differences in heating and debinding conditions across different areas of the billet. Furthermore, the heaters in existing debinding furnaces are mostly distributed vertically, resulting in low heating efficiency and poor temperature uniformity, leading to incomplete debinding in certain areas.

[0004] The aforementioned defects directly lead to unstable glue removal effect in the product. Some blanks suffer from quality problems such as deformation and cracking in subsequent sintering processes due to residual organic impurities, which seriously affects the product qualification rate and makes it difficult to meet the needs of high-precision material preparation. Utility Model Content

[0005] To address the problems in related technologies, this invention provides a dual-channel hot air circulation degreasing furnace, which solves the problems of poor temperature uniformity and poor product degreasing effect.

[0006] To solve the above problems, the following technical solutions are provided: This utility model discloses a dual-channel hot air circulating glue removal furnace, comprising a furnace body and a shell disposed within the furnace body; a first steel plate is sleeved around the outer perimeter of the shell, forming a first annular cavity between the first steel plate and the shell; a second steel plate is sleeved around the first steel plate, forming a second annular cavity between the second steel plate and the first steel plate; an air inlet pipe is disposed at the top of the furnace body, with the air outlet of the air inlet pipe connected to the first annular cavity; a fan is disposed at the top of the second annular cavity, and an air outlet is disposed on the first steel plate corresponding to the fan below the fan, so that the first annular cavity and the second annular cavity are connected through the air outlet; a heating component is disposed at the bottom of the second annular cavity; an exhaust pipe is disposed on the side wall of the second annular cavity; guide plates are fixedly disposed on both sides of the shell, and guide holes are opened on the guide plates.

[0007] The above solution constructs a dual-channel hot air circulation structure by setting up a first annular cavity and a second annular cavity. Gas enters the first annular cavity through the inlet pipe, and then enters the inner cavity of the shell through the guide holes of the guide plates on both sides of the shell to fully contact the product to be processed. The gas carrying waste glue then enters the second annular cavity through the outlet and is finally discharged through the exhaust pipe. This ensures that all areas of the product can fully contact the airflow, completely eliminating dead spots where gas accumulates and avoiding localized glue discharge problems. The dual-channel circulation allows the hot air to quickly carry the waste glue into the second annular cavity after contacting the product. Combined with the forced flow of the top fan, this accelerates the discharge of waste glue gas and reduces the residual time of organic impurities in the furnace. The heating component is located at the bottom of the second annular cavity, which can reheat the circulating airflow to ensure a stable temperature of the hot air entering the shell. This is beneficial for improving glue discharge efficiency and increasing the product qualification rate in subsequent sintering processes. Thus, it solves the problems of poor temperature uniformity and poor glue discharge effect.

[0008] Furthermore, the diameter of the guide holes on the guide plate on the side away from the exhaust pipe decreases sequentially from bottom to top in the vertical direction.

[0009] In the above scheme, the larger diameter of the lower guide hole of the guide plate can enhance the airflow at the bottom, while the smaller diameter of the upper guide hole can prevent the airflow at the top from being lost too quickly, so that the airflow distribution in the vertical direction inside the shell is uniform.

[0010] Furthermore, the bottom of the housing is provided with several groove plates, and vertically arranged support bricks are provided between the lower end face of the groove plate and the second steel plate. A cavity for accommodating the heating component is formed between two adjacent support bricks, and the cavity is connected to the second annular cavity.

[0011] In the above scheme, the slot plate is used to place the product to be processed; the cavity is connected to the second annular cavity, so that the heated airflow can quickly diffuse into the second annular cavity through the cavity, avoiding the formation of local high temperature zones around the heating components, thereby making the temperature inside the furnace uniform.

[0012] Furthermore, the heating assembly includes a heating wire, one end of which passes through the side wall of the furnace body and extends into the cavity. A through hole is provided on the second steel plate below the heating wire, and a glue discharge pipe is connected to the through hole. The end of the glue discharge pipe away from the through hole passes through the side wall of the furnace body and extends out of the furnace body.

[0013] The above solution uses a glue discharge pipe to discharge waste glue gas generated during the heating process. This allows the waste glue gas to pass directly through the through hole into the glue discharge pipe under gravity and be quickly discharged out of the furnace, reducing the retention and secondary adhesion of waste glue inside the furnace and reducing pollution to products and equipment.

[0014] Furthermore, a thermocouple is installed on the side wall of the furnace body, and the detection end of the thermocouple extends into the shell.

[0015] The above scheme uses thermocouples to monitor the heating temperature inside the shell in real time.

[0016] Furthermore, there are two housings arranged in parallel side by side.

[0017] By adopting the above scheme, two shells are set up, and the internal and external structures of the shells are identical. Each shell can independently accommodate the products to be processed, forming a dual-station glue discharge space in the same furnace, which is conducive to improving production efficiency.

[0018] Both ends of the furnace body are fixed with annular plates.

[0019] The above scheme uses an annular plate to form a closed support for the end of the furnace body.

[0020] The above solution has the following advantages: 1. This utility model discloses a dual-channel hot air circulation degreasing furnace. By setting up a first annular cavity and a second annular cavity, a dual-channel hot air circulation structure is constructed. Gas enters the first annular cavity through the air inlet pipe, and enters the inner cavity of the shell through the guide holes of the guide plates on both sides of the shell to fully contact the product to be processed. The gas carrying waste glue then enters the second annular cavity through the air outlet, and is finally discharged through the exhaust pipe. This ensures that the product in all areas can fully contact the airflow, completely eliminate dead spots of gas accumulation, and avoid local glue degreasing problems.

[0021] 2. The dual-channel circulation allows hot air to quickly carry waste adhesive into the second annular cavity after contacting the product. Combined with the forced flow of the top fan, this accelerates the discharge of waste adhesive gas and reduces the residual time of organic impurities in the furnace. The heating component is located at the bottom of the second annular cavity, which can reheat the circulating airflow to ensure a stable temperature of the hot air entering the shell. This helps to improve the adhesive discharge efficiency and increase the product qualification rate of subsequent sintering processes.

[0022] 3. By setting the guide holes, the larger diameter of the guide holes at the bottom of the guide plate can enhance the airflow at the bottom, while the smaller diameter of the guide holes at the top of the guide plate can prevent the airflow at the top from being lost too quickly, so that the airflow distribution in the vertical direction inside the shell is uniform. Attached Figure Description

[0023] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein: Figure 1 This is a schematic diagram of the structure of a dual-channel hot air circulation glue degreasing furnace; Figure 2 A top view of a dual-channel hot air circulation degreasing oven; Figure 3A schematic diagram of the internal structure of a dual-channel hot air circulation degreasing furnace; Figure 4 A cross-sectional view of a dual-channel hot air circulation degreasing oven; Figure 5 This is a schematic diagram of the structure of a guide plate on the side away from the exhaust pipe in a dual-channel hot air circulating glue degreasing furnace; Explanation of reference numerals in the attached drawings: 1. Furnace body; 2. Shell; 3. First steel plate; 4. First annular cavity; 5. Second steel plate; 6. Second annular cavity; 7. Inlet pipe; 8. Fan; 9. Exhaust pipe; 10. Guide plate; 11. Guide hole; 12. Groove plate; 13. Support brick; 14. Cavity; 15. Heating wire; 16. Glue discharge pipe; 17. Thermocouple; 18. Annular plate. 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] In specific embodiment 1, such as Figures 1-5As shown, this utility model discloses a dual-channel hot air circulating degreasing furnace, comprising a furnace body 1 and a shell 2 disposed within the furnace body 1; a first steel plate 3 is sleeved around the shell 2, forming a first annular cavity 4 between the first steel plate 3 and the shell 2; a second steel plate 5 is sleeved around the first steel plate 3, forming a second annular cavity 6 between the second steel plate 5 and the first steel plate 3; an air inlet pipe 7 is disposed at the top of the furnace body 1, with its outlet connected to the first annular cavity 4; a fan 8 is disposed at the top of the second annular cavity 6, with an air outlet on the first steel plate 3 corresponding to the fan 8, allowing the first annular cavity 4 and the second annular cavity 6 to communicate through the air outlet; a heating component is disposed at the bottom of the second annular cavity 6; an exhaust pipe 9 is disposed on the side wall of the second annular cavity 6; guide plates 10 are fixed on both sides of the shell 2, with guide holes 11 formed on the guide plates 10; the first annular cavity 4 and the second annular cavity 6 are connected through the air outlet. The configuration of section 6 establishes a dual-channel hot air circulation structure. Gas enters the first annular cavity 4 through the inlet pipe 7, and then enters the inner cavity of the shell 2 through the guide holes 11 of the guide plates 10 on both sides of the shell 2, making full contact with the product to be processed. The gas carrying waste glue then enters the second annular cavity 6 through the outlet, and is finally discharged through the exhaust pipe 9. This ensures that the product in all areas can make full contact with the airflow, completely eliminating dead spots of gas accumulation and avoiding local glue discharge obstruction. The dual-channel circulation allows the hot air to quickly carry the waste glue into the second annular cavity 6 after contacting the product. Combined with the forced flow of the top fan 8, this accelerates the discharge of waste glue gas and reduces the residual time of organic impurities in the furnace body 1. The heating component is set at the bottom of the second annular cavity 6, which can reheat the circulating airflow to ensure a stable temperature of the hot air entering the shell 2, which is conducive to improving glue discharge efficiency and increasing the product qualification rate of subsequent sintering processes.

[0026] The bottom of the shell 2 is provided with several slot plates 12 for placing products to be processed. Vertically arranged support bricks 13 are provided between the lower end face of the slot plate 12 and the second steel plate 5. A cavity 14 for accommodating the heating component is formed between two adjacent support bricks 13. The cavity 14 is connected to the second annular cavity 6, so that the heated airflow can quickly diffuse into the second annular cavity 6 through the cavity 14, avoiding the formation of local high temperature zones around the heating component, thereby making the temperature inside the furnace 1 uniform.

[0027] like Figure 3 , 4 As shown, the heating assembly includes a heating wire 15. One end of the heating wire 15 passes through the side wall of the furnace body 1 and extends into the cavity 14. A through hole is provided on the second steel plate 5 below the heating wire 15. A glue discharge pipe 16 is connected to the through hole. The end of the glue discharge pipe 16 away from the through hole passes through the side wall of the furnace body 1 and extends to the outside of the furnace body 1. It is used to discharge the waste glue gas generated during the heating process, so that it can directly enter the glue discharge pipe 16 through the through hole under the action of gravity and be quickly discharged out of the furnace, reducing the retention and secondary adhesion of waste glue in the furnace body 1 and reducing the pollution to products and equipment.

[0028] like Figure 4 As shown, a thermocouple 17 is installed on the side wall of the furnace body 1. The detection end of the thermocouple 17 extends into the housing 2 and is used to monitor the heating temperature inside the housing 2 in real time.

[0029] Both ends of the furnace body 1 are fixed with annular plates 18 to form a closed support for the ends of the furnace body 1.

[0030] In a specific embodiment 2, such as Figure 5 As shown, the difference between this embodiment and embodiment 1 is that the diameter of the guide hole 11 on the guide plate 10 away from the exhaust pipe 9 in this embodiment decreases from bottom to top in the vertical direction. The diameter of the lower guide hole 11 of the guide plate 10 is larger, which can enhance the airflow at the bottom. The diameter of the upper guide hole 11 of the guide plate 10 is smaller, which can prevent the airflow at the top from being lost too quickly, so that the airflow distribution in the vertical direction inside the housing 2 is uniform.

[0031] In a specific embodiment 3, such as Figure 3 , 4 As shown, the difference between this embodiment and embodiments 1 and 2 is that there are two shells 2 in this embodiment. The two shells 2 are arranged in parallel and side by side, and the internal and external structures of the shells 2 are the same. They can each independently accommodate the products to be processed, forming a dual-station glue discharge space in the same furnace body 1, which is conducive to improving production efficiency.

[0032] During operation, the product to be processed is placed on the slot plate 12, and gas is introduced through the air inlet pipe 7. The heating wire 15 and the fan 8 are turned on. The gas enters the first annular cavity 4 through the air inlet pipe 7. Under the guidance of the fan 8, the gas in the first annular cavity 4 enters the inner cavity of the shell 2 through the guide holes 11 on the guide plates 10 on both sides of the shell 2, making full contact with the product to be processed and carrying the waste glue. The gas carrying the waste glue enters the second annular cavity 6 through the air outlet on the first steel plate 3. The heating component at the bottom of the second annular cavity 6 heats the gas. Part of the heated gas is discharged from the exhaust port, and part is circulated under the action of the fan 8. The waste glue gas generated by the operation of the heating wire 15 enters the glue discharge pipe 16 through the through hole and is discharged outside the furnace body 1, finally completing the glue discharge of the product.

[0033] In the description of this utility model, it should be understood that the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, unless otherwise specified and limited, it should be noted that the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to mechanical or electrical connections, or internal connections between two components, and can be direct connections or indirect connections through an intermediate medium. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0034] Obviously, the above embodiments are merely examples for clear illustration and are not intended to limit the implementation. For those skilled in the art, other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all implementation methods here, and any obvious variations or modifications derived therefrom are still within the protection scope of this utility model.

Claims

1. A dual-channel hot air circulation degreasing oven, characterized in that, The furnace includes a furnace body (1) and a shell (2) disposed within the furnace body (1); a first steel plate (3) is fitted around the shell (2), and the first steel plate (3) and the shell (2) enclose a first annular cavity (4); a second steel plate (5) is fitted around the first steel plate (3), and the second steel plate (5) and the first steel plate (3) enclose a second annular cavity (6); an air inlet pipe (7) is provided at the top of the furnace body (1), and the air outlet of the air inlet pipe (7) is connected to the first annular cavity (4); a fan (8) is provided at the top of the second annular cavity (6), and an air outlet is provided on the first steel plate (3) below the fan (8), so that the first annular cavity (4) and the second annular cavity (6) are connected through the air outlet; a heating component is provided at the bottom of the second annular cavity (6); an exhaust pipe (9) is provided on the side wall of the second annular cavity (6); guide plates (10) are fixedly provided on both sides of the shell (2), and guide holes (11) are opened on the guide plates (10).

2. The dual-channel hot air circulation degreasing furnace as described in claim 1, characterized in that, The diameter of the guide hole (11) on the guide plate (10) on the side away from the exhaust pipe (9) decreases from bottom to top in the vertical direction.

3. The dual-channel hot air circulation degreasing furnace as described in claim 1, characterized in that, The bottom of the housing (2) is provided with a number of groove plates (12). The lower end face of the groove plate (12) and the second steel plate (5) are provided with vertically arranged support bricks (13). A cavity (14) for accommodating the heating component is formed between two adjacent support bricks (13), and the cavity (14) is connected to the second annular cavity (6).

4. The dual-channel hot air circulation degreasing furnace as described in claim 1, characterized in that, The heating assembly includes a heating wire (15), one end of which passes through the side wall of the furnace body (1) and extends into the cavity (14). A through hole is provided on the second steel plate (5) below the heating wire (15), and a glue drain pipe (16) is connected to the through hole. The end of the glue drain pipe (16) away from the through hole passes through the side wall of the furnace body (1) and extends to the outside of the furnace body (1).

5. A dual-channel hot air circulation degreasing furnace as described in claim 1, characterized in that, Thermocouples (17) are installed on the side wall of the furnace body (1), and the detection end of the thermocouples (17) extends into the shell (2).

6. A dual-channel hot air circulation degreasing furnace as described in claim 1, characterized in that, There are two housings (2), which are arranged in parallel side by side.

7. A dual-channel hot air circulation degreasing furnace as described in claim 1, characterized in that, Both ends of the furnace body (1) are fixed with annular plates (18).

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