A drying device for metal castings

Abstract

This utility model discloses a drying device for metal castings, relating to the field of metal casting processing technology. It includes a drying mechanism comprising a drying chamber. Heating plates are fixedly installed on the left and right sides inside the drying chamber. Support legs are fixedly connected to the four corners of the bottom of the drying chamber. A workpiece rotation assembly and a hot air flow mechanism are fixedly installed at the bottom of the drying chamber. This utility model, by setting up a hot air flow mechanism, in which an axial fan cooperates with the air inlet and outlet slots to construct an active airflow circulation channel, forces airflow within the chamber, effectively breaking the temperature gradient and making the temperature distribution within the drying chamber more uniform. Simultaneously, the workpiece rotation assembly, in conjunction with the hot air flow, further improves the uniformity of heating of various parts of the casting, solving the problem of uneven temperature field caused by insufficient airflow in the aforementioned equipment, resulting in a decrease in drying effect.

Description

Technical Field

[0001] This utility model relates to the field of metal casting processing technology, specifically a drying device for metal castings. Background Technology

[0002] Metal casting is a process in which metal is melted into a liquid that meets certain requirements, poured into a mold, cooled and solidified, and then cleaned to obtain a casting with a predetermined shape, size, and properties. Because the casting blank is nearly complete, it achieves the goal of eliminating or minimizing machining, reducing costs and time to some extent. Casting is one of the fundamental processes in modern machinery manufacturing. After cleaning, the cast metal parts require drying.

[0003] According to the authorization announcement number CN220288058U, a drying device for metal castings is disclosed, relating to the field of metal casting processing. The device includes a drying chamber with a sealed door installed on its outer wall, an electric heating plate screwed onto its inner wall, a rotating mechanism installed at the bottom outer side of the drying chamber, a mounting frame welded to the outer wall of the rotating mechanism, a telescopic mechanism welded to the top of the mounting frame, and a hook welded to the top of the telescopic mechanism. This invention, through the rotating mechanism, suspends and fixes the metal casting to be dried via hooks on the fixing frames at both ends of a connecting rod. Turning on the drive motor rotates the connecting rod, thereby rotating the fixing frames at both ends of the connecting rod. This ensures more uniform heating of the metal casting suspended on the hooks during drying, avoiding the need for secondary drying due to uneven heating and improving the drying efficiency of the device.

[0004] Based on the search of the aforementioned patents and the findings of existing equipment, the lack of airflow in the aforementioned equipment leads to uneven temperature field. Specifically, the device relies solely on a combination of radiant heating from the sidewall of the electric heating plate and rotation of the casting. No airflow circulation or disturbance components are installed inside the drying oven. Since the electric heating plate only releases heat through unidirectional radiant heating from the sidewall, the natural convection intensity of the air inside the oven is extremely weak, easily forming a significant temperature gradient. The temperature of the sidewall area near the heating plate is too high, while the temperature of the center and corners of the drying oven, which are far from the heating plate, is too low. Even if the casting is rotated by the rotating mechanism, the unevenness of the overall temperature distribution inside the oven cannot be eliminated, resulting in significant differences in heating of different areas on the surface of the casting. Utility Model Content

[0005] To address the problems mentioned in the background art, the purpose of this utility model is to provide a drying device for metal castings, which has the advantage of uniform drying and solves the problem of uneven temperature field caused by lack of airflow in the above-mentioned equipment, resulting in a decrease in drying effect.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a drying device for metal castings, comprising a drying mechanism, the drying mechanism including a drying chamber, heating plates fixedly installed on the left and right sides inside the drying chamber, support legs fixedly connected to the four corners of the bottom of the drying chamber, a workpiece rotating assembly fixedly installed at the bottom of the drying chamber, and a hot air flow mechanism, the hot air flow mechanism including an axial fan fixedly installed at the top inside the drying chamber, air outlet slots provided on the left and right sides of the bottom of the drying chamber, multiple air outlet slots provided at equal intervals, air inlet slots provided on the left and right sides of the top of the back of the drying chamber, a guide assembly provided at the bottom of the axial fan, and dustproof components fixedly connected to the left and right sides of the back of the drying chamber.

[0007] In a preferred embodiment of this utility model, the airflow guiding assembly includes an air guide plate and a mounting rod. The air guide plate is disposed at the bottom of the axial fan and is arranged in an inverted V shape. The air guide plate guides the airflow to the heating plate. The mounting rod is fixedly connected to the four corners of the top of the air guide plate, and the top of the mounting rod is fixedly connected to the top of the inner wall of the drying chamber.

[0008] As a preferred embodiment of this utility model, the dustproof component includes a mounting frame, which is fixedly connected to the left and right sides of the top back of the drying oven. The mounting frame encloses the air inlet slot, and a dustproof net is fixedly installed on the rear side inside the mounting frame.

[0009] In a preferred embodiment of this invention, the workpiece rotating assembly includes a motor, which is fixedly installed at the bottom of the drying oven. A turntable is fixedly installed at the output end of the motor, and a shaft is fixedly connected to the top of the turntable. Multiple hanging rods are distributed in a ring on the top surface of the shaft.

[0010] As a preferred embodiment of this utility model, air collecting hoods are fixedly installed on the left and right sides of the bottom of the drying oven. The air collecting hoods partially cover the air outlet slots, and a circulation pipe is connected to the bottom of the air collecting hoods. The other end of the circulation pipe is connected to the mounting frame.

[0011] As a preferred embodiment of this invention, the front of the drying oven is movably connected to a sealing door via a hinge.

[0012] As a preferred embodiment of this invention, the drying oven integrates a temperature control system.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model, by setting up a hot air flow mechanism, in which the axial fan, together with the air inlet and outlet slots, constructs an active airflow circulation channel, forcibly driving the airflow inside the chamber, effectively breaking the temperature gradient, and making the temperature distribution inside the drying chamber more uniform. At the same time, the workpiece rotation component, in conjunction with the hot air flow, further improves the uniformity of heating of various parts of the casting, solving the problem of uneven temperature field caused by the lack of airflow in the above-mentioned equipment, which leads to a decrease in drying effect, and achieving a uniform drying effect.

[0014] 2. By setting up a flow guiding component, the inverted V-shaped air guide plate can accurately guide the airflow to the heating plate, ensuring that the airflow is in full contact with the heating plate, maximizing the use of the heat generated by the heating plate, and improving the heat exchange efficiency. At the same time, the guided airflow can be more evenly distributed in the drying chamber, further weakening the temperature gradient and avoiding local temperature being too low or too high due to airflow turbulence, so that the surface of the casting is heated more evenly and the drying effect is more stable.

[0015] 3. This utility model, by setting up a dustproof component and filtering the intake air with a dustproof net, effectively intercepts impurities, ensures that the air entering the drying oven is clean, avoids contamination of the castings, protects the surface quality of the metal castings, reduces subsequent cleaning processes, and lowers production costs. Attached Figure Description

[0016] Figure 1 This is a first-view three-dimensional structural diagram of the present invention; Figure 2 This is a two-dimensional structural diagram of the present invention from a second perspective; Figure 3 This is a schematic diagram of the third-view three-dimensional structure of this utility model.

[0017] In the diagram: 1. Drying mechanism; 101. Drying box; 102. Heating plate; 103. Support leg; 104. Workpiece rotation assembly; 1041. Motor; 1042. Turntable; 1043. Shaft; 1044. Hanging rod; 2. Hot air flow mechanism; 21. Axial flow fan; 22. Air outlet duct; 23. Air inlet duct; 24. Air guide assembly; 241. Air guide plate; 242. Mounting rod; 25. Dustproof assembly; 251. Mounting frame; 252. Dustproof net; 3. Air collection hood; 4. Circulation pipe; 5. Sealing door. Detailed Implementation

[0018] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0019] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0020] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0021] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0022] Example 1 Reference Figure 1-3 This is the first embodiment of the present invention, which provides a drying device for metal castings, including a drying mechanism 1, a drying chamber 101, heating plates 102 fixedly installed on the left and right sides inside the drying chamber 101, support legs 103 fixedly connected to the four corners of the bottom of the drying chamber 101, a workpiece rotation assembly 104 fixedly installed at the bottom of the drying chamber 101, and a hot air flow mechanism 2, including an axial fan 21, the axial fan 21 fixedly installed at the top inside the drying chamber 101, air outlet slots 22 opened on the left and right sides of the bottom of the drying chamber 101, multiple air outlet slots 22 are provided and are equidistant, air inlet slots 23 are opened on the left and right sides of the top back of the drying chamber 101, a guide assembly 24 is provided at the bottom of the axial fan 21, and dustproof components 25 are fixedly connected to the left and right sides of the back of the drying chamber 101.

[0023] Specifically, by setting up a hot air flow component, the axial fan 21 of the hot air flow mechanism 2 works in conjunction with the air inlet slot 23 and the air outlet slot 22 to construct an active airflow circulation channel, which forces the air inside the chamber to flow, effectively breaking the temperature gradient and making the temperature distribution inside the drying chamber 101 more uniform.

[0024] Furthermore, after the hot air flow mechanism 2 is started, the axial flow fan 21 at the top operates, drawing outside air into the drying chamber 101 from the air inlet slots 23 on the top left and right sides of the back of the drying chamber 101. The drawn-in air is heated by the heating plate 102 to form hot air. The hot air flows in the drying chamber 101 under the action of the axial flow fan 21 to dry the rotating casting. After the heat exchange is completed, the air is discharged from the air outlet slots 22 on the bottom left and right sides of the drying chamber 101.

[0025] Example 2 In the second embodiment of this utility model, the air guiding assembly 24 includes an air guide plate 241 and a mounting rod 242. The air guide plate 241 is disposed at the bottom of the axial fan 21 and is arranged in an inverted V shape. The air guide plate 241 guides the airflow to the heating plate 102. The mounting rod 242 is fixedly connected to the four corners of the top of the air guide plate 241, and the top of the mounting rod 242 is fixedly connected to the top of the inner wall of the drying oven 101.

[0026] Specifically, by setting the airflow guiding component 24, the inverted V-shaped air guide plate 241 can accurately guide the airflow to the heating plate 102, ensuring that the airflow is in full contact with the heating plate 102, maximizing the use of the heat generated by the heating plate 102, and improving the heat exchange efficiency. At the same time, the guided airflow can be more evenly distributed in the drying chamber 101, further weakening the temperature gradient and avoiding local temperature being too low or too high due to airflow turbulence, so that the surface of the casting is heated more evenly and the drying effect is more stable.

[0027] Furthermore, the airflow guide assembly 24 is installed at the bottom of the axial fan 21. When the axial fan 21 operates and generates downward airflow, the inverted V-shaped airflow guide plate 241 will guide the airflow, directing the airflow that might otherwise be vertically downward to the direction of the heating plates 102 on the left and right sides of the drying chamber 101. After being heated by the heating plates 102, the airflow is then diffused more evenly to various areas inside the drying chamber 101, acting on the rotating metal casting.

[0028] Example 3 In the third embodiment of this utility model, the dustproof component 25 includes a mounting frame 251, which is fixedly connected to the left and right sides of the top back of the drying oven 101. The mounting frame 251 encloses the air inlet slot 23, and a dustproof net 252 is fixedly installed on the rear side inside the mounting frame 251.

[0029] Specifically, by setting up a dustproof component 25 and filtering the intake air through a dustproof net 252, impurities are effectively intercepted, ensuring that the air entering the drying oven 101 is clean, preventing the castings from being contaminated, ensuring the surface quality of the metal castings, reducing subsequent cleaning processes, and lowering production costs.

[0030] Furthermore, the mounting frame 251 of the dustproof component 25 is fixed to the top left and right sides of the back of the drying oven 101 and completely encloses the air inlet slot 23. When the axial fan 21 draws in external air through the air inlet slot 23, the air will first pass through the dustproof net 252 fixed inside the rear of the mounting frame 251. The dustproof net 252 uses its own filtration structure to block dust, impurities and other contaminants in the air. The filtered clean air then enters the drying oven 101 to participate in the hot air circulation.

[0031] Working principle: In use, open the sealed door 5 on the front of the drying oven 101, and suspend the cleaned metal castings to be dried one by one on the hanging rod 1044 of the workpiece rotating assembly 104. After suspension, close the sealed door 5, and then turn on the main switch of the device. First, activate the temperature control system integrated inside the drying oven 101, and set a suitable drying temperature through the temperature control system. Then, the heating plates 102 on the left and right sides of the drying oven 101 are powered on and begin to heat up. The heating plates 102 convert electrical energy into heat energy, providing a stable heat source for the interior of the drying oven 101. The temperature sensors of the temperature control system monitor the temperature of each area inside the drying oven 101 in real time and transmit the temperature data to the control system to ensure that the temperature inside the oven gradually approaches and stabilizes at the set value. When the temperature of the heating plates 102 rises to a certain level, the start-up switch is activated. The axial fan 21 of the hot air flow mechanism 2 generates a downward airflow. At this time, the guide component 24 at the bottom of the axial fan 21 begins to function. The inverted V-shaped air guide plate 241 directs the vertically downward airflow generated by the axial fan 21 towards the heating plates 102 on the left and right sides of the drying chamber 101. After the airflow fully contacts the heating plates 102, it absorbs heat to form hot air. The guided hot air is evenly diffused to all areas inside the drying chamber 101, avoiding uneven local temperatures caused by chaotic airflow. During the air intake process of the axial fan 21, external air enters the drying chamber 101 through the air inlet slots 23 on the top left and right sides of the back of the drying chamber 101. At this time, the dustproof component 25 on the back of the drying chamber 101 begins to work, and the mounting frame 251... The dust filter 252 inside filters the incoming external air, intercepting dust and impurities to ensure the air entering the drying chamber 101 is clean and prevents impurities from adhering to the surface of the casting and affecting its quality. Simultaneously, the motor 1041 of the workpiece rotating assembly 104 starts, and the output of the motor 1041 drives the turntable 1042 to rotate. The turntable 1042 drives the top-fixed shaft 1043 to rotate synchronously, which in turn drives the hanging rods 1044, which are distributed in a ring on the surface, to rotate. The metal casting suspended on the hanging rods 1044 then rotates 360° within the drying chamber 101. During the rotation of the casting, all surfaces can continuously and fully contact the hot air generated by the hot air flow mechanism 2. Combined with the uniform distribution of hot air within the chamber, this prevents insufficient heating in localized areas of the casting. To ensure consistent drying rates across all parts of the casting surface, hot air exchanges heat with the metal casting inside the drying chamber 101. The air carrying evaporated moisture from the casting surface is then discharged from the air outlets 22 on the left and right sides of the bottom of the drying chamber 101. At this time, the air collection hood 3 at the bottom of the drying chamber 101 collects the discharged hot air. Because the air collection hood 3 partially covers the air outlet 22, it can efficiently collect most of the discharged air. The collected hot air is then transported through the circulation pipe 4 connected to the bottom of the air collection hood 3 to the mounting frame 251 of the dustproof component 25, where it mixes with fresh air filtered by the dustproof net 252 from the outside. The mixed air is then drawn back into the drying chamber 101 by the axial fan 21, heated by the heating plate 102, and forms new hot air to participate in the circulation, thus realizing the recycling of hot air.This reduces heat waste and lowers the energy consumption of the heating plate 102. It also reduces the amount of external air intake and lowers the filtration pressure of the dust filter 252. Once it is confirmed through observation that the casting is completely dry, the motor 1041 of the heating plate 102 and the workpiece rotation assembly 104 is first turned off, stopping the heat source supply and casting rotation. Then, the axial flow fan 21 and temperature control system are kept running for a period of time. The axial flow fan 21 continues to drive the airflow inside the chamber, gradually expelling residual heat and humid air from the drying chamber 101. The temperature control system monitors the temperature inside the chamber in real time. When the temperature inside the chamber drops to near room temperature, the axial flow fan 21 and temperature control system are turned off. Then, the sealing door 5 is opened, and the dried metal casting is removed from the hanging rod 1044 for subsequent inspection or processing.

[0032] In summary: By setting up the hot air flow mechanism 2, the axial fan 21 in the hot air flow mechanism 2, together with the air inlet slot 23 and the air outlet slot 22, constructs an active airflow circulation channel, which forcibly drives the air flow inside the chamber, effectively breaking the temperature gradient and making the temperature distribution inside the drying chamber 101 more uniform. At the same time, the workpiece rotation component 104, in conjunction with the hot air flow, further improves the uniformity of heating of various parts of the casting, solving the problem of uneven temperature field caused by the lack of airflow in the above-mentioned equipment, which leads to a decrease in drying effect, and achieving a uniform drying effect.

[0033] It should be noted that (motor, heating plate, axial fan, temperature control system) are existing devices or equipment, or devices or equipment that can be implemented by existing technology. The power supply, connection method, usage method, power source, fixing method, installation method, control method, etc. of the equipment, as well as the materials of each accessory and the selection of various parameters are common knowledge to those skilled in the art, and therefore will not be described in detail in this application document.

[0034] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0035] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.

[0036] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0037] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A drying device for metal castings, characterized by: The equipment includes a drying mechanism (1), which includes a drying box (101). Heating plates (102) are fixedly installed on the left and right sides inside the drying box (101). Support legs (103) are fixedly connected to the four corners of the bottom of the drying box (101). A workpiece rotating assembly (104) is fixedly installed at the bottom of the drying box (101). The equipment also includes a hot air flow mechanism (2), which includes an axial fan (21). The axial fan (21) is fixedly installed at the top inside the drying box (101). Air outlet slots (22) are provided on the left and right sides of the bottom of the drying box (101). Multiple air outlet slots (22) are provided and are equidistant. Air inlet slots (23) are provided on the left and right sides of the top back of the drying box (101). A guide assembly (24) is provided at the bottom of the axial fan (21). Dustproof components (25) are fixedly connected to the left and right sides of the back of the drying box (101).

2. A drying apparatus for metal castings as claimed in claim 1, wherein: The airflow guiding assembly (24) includes an air guide plate (241) and a mounting rod (242). The air guide plate (241) is located at the bottom of the axial fan (21). The air guide plate (241) is arranged in an inverted V shape. The air guide plate (241) guides the airflow to the heating plate (102). The mounting rod (242) is fixedly connected to the four corners of the top of the air guide plate (241). The top of the mounting rod (242) is fixedly connected to the top of the inner wall of the drying box (101).

3. The drying apparatus for metal castings according to claim 1, characterized in that: The dustproof component (25) includes a mounting frame (251), which is fixedly connected to the left and right sides of the top back of the drying box (101). The mounting frame (251) encloses the air inlet slot (23), and a dustproof net (252) is fixedly installed on the rear side inside the mounting frame (251).

4. The drying device for metal castings according to claim 1, characterized in that: The workpiece rotating assembly (104) includes a motor (1041), which is fixedly installed at the bottom of the drying oven (101). A turntable (1042) is fixedly installed at the output end of the motor (1041). A shaft (1043) is fixedly connected to the top of the turntable (1042). Multiple hanging rods (1044) are distributed in a ring on the top surface of the shaft (1043).

5. A drying device for metal castings according to claim 3, characterized in that: The drying oven (101) has a gas collection hood (3) fixedly installed on the left and right sides of the bottom. The gas collection hood (3) partially covers the air outlet slot (22). The bottom of the gas collection hood (3) is connected to a circulation pipe (4). The other end of the circulation pipe (4) is connected to the mounting frame (251).

6. A drying device for metal castings according to claim 1, characterized in that: The front of the drying oven (101) is movably connected to a sealing door (5) via a hinge.

7. A drying device for metal castings according to claim 1, characterized in that: The drying oven (101) has an integrated temperature control system.

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