Multi-section heat control preheating device for die-casting mold

Abstract

The utility model relates to die preheating technical field, concretely relates to a kind of multi-section heat control preheating device of die casting die, including preheating box, the top of preheating box is provided with preheating component, preheating component includes the heater connected fixedly in the top of preheating box, the input end of heater is communicated with the inner wall of preheating box, the output end of heater is communicated with double-flow pipe, the both ends of double-flow pipe are fixedly connected with connecting mouth, the inner wall of preheating box is equipped with shunt cavity, the inner wall between the both sides inner wall of preheating box and shunt cavity is equipped with two groups of opposite preheating air port, two connecting mouth and the top of shunt cavity are interconnected, the sidewall of preheating box is fixedly installed with temperature controller for controlling heater.Compared with prior art, the application avoids the risk of manual handling or using clamping tools in high temperature environment, reduces labor intensity, improves the efficiency of taking and placing, and prevents the operation difficulty and safety hazard caused by heat leakage.

Description

Technical Field

[0001] This utility model relates to the field of mold preheating technology, and in particular to a multi-stage thermal control preheating device for die casting molds. Background Technology

[0002] Die-casting molds play a decisive role in die-casting production, and their temperature directly affects the filling performance of the molten metal, the surface quality of the casting, and the service life of the mold. To avoid thermal shock and casting defects caused by direct contact between the cold mold and the high-temperature molten metal, the mold usually needs to be preheated before production. Current technologies often use mold preheating chambers to heat the mold as a whole, gradually reaching a suitable working temperature, thereby ensuring the stability of the die-casting process and the quality of the formed product. Mold preheating chambers typically utilize electric heating tubes in conjunction with a hot air circulation system to create a uniform high-temperature environment inside the chamber. The mold is placed inside the chamber via a rack, achieving uniform heating within a predetermined time. Some equipment also employs a multi-stage preheating method: first, at a low temperature stage, moisture and condensation are dissipated from the mold surface; then, at a medium temperature stage, overall heating is achieved; and finally, at a high temperature stage, the suitable working temperature for die casting is reached. This effectively reduces the risk of thermal shock and improves the stability of the mold after production.

[0003] A Chinese patent has been published: a mold preheating device, patent announcement number: CN219028669U. The patent "includes a preheating box body with an opening, a preheating rack slidably disposed inside the preheating box body, a preheating component disposed inside the preheating box body, the preheating rack including a sliding component, a first placement plate disposed on the sliding component, and a second placement plate disposed below the first placement plate."

[0004] The device involves workers pushing and pulling the first and second placement plates to retrieve the molds. However, in actual use, this mold preheating box has significant shortcomings in the mold retrieval process. Molds are typically placed on racks inside the box. When molds need to be removed after preheating, it often relies on manual labor using specialized clamping tools to move small molds directly, or using a trolley to push out heavy molds. Furthermore, the limited space at the box opening restricts operator movement, making the process cumbersome and inefficient. More importantly, when the preheating box door is opened, the high internal heat rapidly escapes, creating a strong heat wave. This not only poses a risk of burns to operators but also makes retrieval operations in high-temperature environments more difficult, increasing worker workload and safety hazards. Therefore, the existing mold preheating box suffers from insufficient safety and operational inconvenience in the mold retrieval process, urgently requiring a new solution. Utility Model Content

[0005] In view of this, the purpose of this utility model is to propose a multi-stage thermal control preheating device for die casting molds, so as to solve the problems of insufficient safety and inconvenience in operation of existing mold preheating boxes during the mold handling process.

[0006] Based on the above objectives, this utility model provides a multi-stage thermal control preheating device for die-casting molds, including a preheating box. A preheating assembly is installed on the top of the preheating box. The preheating assembly includes a hot air blower fixedly connected to the top of the preheating box. The input end of the hot air blower is connected to the inner wall of the preheating box, and the output end of the hot air blower is connected to a dual-flow pipe. Connecting nozzles are fixedly connected to both ends of the dual-flow pipe. A flow-dividing cavity is opened on the inner wall of the preheating box. Two sets of opposing preheating air inlets are opened between the inner walls of both sides of the preheating box and the inner wall of the flow-dividing cavity. The two connecting nozzles are connected to the top of the flow-dividing cavity. A temperature controller for controlling the hot air blower is fixedly installed on the side wall of the preheating box. A placement rack for placing the die-casting mold is placed inside the preheating box. Two opposing doors are rotatably connected to the side wall of the preheating box. A convenient retrieval component is provided on the side wall of the preheating box to prevent burns when retrieving the die-casting mold from the placement rack.

[0007] Preferably, the convenient assembly includes two electric telescopic rods rotatably connected to the top of the preheating box, the telescopic ends of the two electric telescopic rods being rotatably connected to the top of the two box doors respectively, two guide rails being fixedly connected to the side wall of the preheating box, and two sets of guide rail wheels being fixedly connected to the bottom of the placement rack.

[0008] Preferably, a linkage plate is fixedly connected to the side wall of the cabinet door near the temperature controller. The linkage plate is located at the bottom of the placement rack. The linkage plate has a Z-shaped structure. A sliding groove is provided on the side wall of the linkage plate. A rotating column is rotatably connected to the bottom of the placement rack. The rotating column is rolled inside the sliding groove.

[0009] Preferably, two support frames are fixedly connected between the inner walls of the placement rack, and a placement plate for placing the die-casting mold is placed on the top of each of the two support frames. The top of the placement plate is provided with a flow hole for hot air to circulate.

[0010] Preferably, the middle part of the placement plate has a connecting hole for blowing hot air into the mold cavity for preheating.

[0011] Preferably, each of the two support frames is fixedly connected to oppositely arranged guide pipes on both sides of its bottom. The guide pipes are arc-shaped, and their outlet ends face into the mold cavity.

[0012] Preferably, when the two sets of placement racks move to the top of the guide rails, the two sets of guide rail wheels are respectively rolled and connected to the top of the two guide rails, and the guide rail wheels and guide rails are adapted to each other.

[0013] Preferably, the two sets of opposing hot air vents on both sides of the inner wall of the preheating box are on the same horizontal plane as the mold and the guide pipe.

[0014] Preferably, the connecting hole is located at the bottom of the mold.

[0015] The beneficial effects of this utility model are: 1. The multi-stage thermal control preheating device for this die-casting mold controls the opening of the box door via an electric telescopic rod. The box door on the side closer to the temperature controller drives the linkage plate and rotating column, so that the placement rack moves smoothly to the end of the guide rail away from the box body. The operator can directly take out the mold. This design avoids the risks of manual handling or using clamping tools in high-temperature environments, reduces labor intensity, improves the efficiency of picking and placing, and at the same time prevents the operational difficulties and safety hazards caused by heat leakage.

[0016] 2. This multi-stage thermal control preheating device for die casting molds uses a preheating component to blow hot air evenly onto the mold on the placement rack via a hot air blower, dual-flow pipe, connecting nozzle, and flow distribution chamber. This achieves rapid heating of the mold and uniform temperature distribution. At the same time, the flow guide pipe optimizes the airflow direction to ensure that hot air covers the inside of the mold cavity, avoiding local overheating or uneven heating and improving the efficiency of multi-stage preheating. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is a three-dimensional structural diagram of the preheating box and placement rack of this utility model; Figure 3 This is a three-dimensional structural diagram of the flow distribution cavity and preheating air outlet of this utility model; Figure 4 This is a schematic diagram of the three-dimensional structure of the linkage plate and the placement rack of this utility model; Figure 5 This is a three-dimensional structural diagram of the placement plate and guide tube of this utility model.

[0019] The diagram is marked as follows: 1. Preheating box; 2. Hot air blower; 3. Dual-flow pipe; 4. Connecting nozzle; 5. Flow divider; 6. Preheating air outlet; 7. Temperature controller; 8. Placement rack; 9. Support frame; 10. Placement plate; 11. Flow hole; 12. Guide pipe; 13. Box door; 14. Electric telescopic rod; 15. Guide rail; 16. Guide rail wheel; 17. Linkage plate; 18. Slide groove; 19. Rotating column. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0021] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0022] like Figures 1 to 5 As shown, a multi-stage thermal control preheating device for die-casting molds includes a preheating box 1. A preheating assembly is installed on the top of the preheating box 1. The preheating assembly includes a hot air blower 2 fixedly connected to the top of the preheating box 1. The input end of the hot air blower 2 is connected to the inner wall of the preheating box 1, and the output end of the hot air blower 2 is connected to a dual-flow pipe 3. Both ends of the dual-flow pipe 3 are fixedly connected to connecting nozzles 4. A flow-dividing cavity 5 is opened in the inner wall of the preheating box 1. Two sets of opposing preheating air inlets 6 are opened between the inner walls of both sides of the preheating box 1 and the inner wall of the flow-dividing cavity 5. The two connecting nozzles 4 are connected to the top of the flow-dividing cavity 5. A temperature controller 7 for controlling the hot air blower 2 is fixedly installed on the side wall of the preheating box 1. A placement rack 8 for placing the die-casting mold is placed inside the preheating box 1. Two support frames are fixedly connected between the inner walls of the placement rack 8. 9. Each of the two support frames 9 has a placement plate 10 for placing the die-casting mold on its top. The top of the placement plate 10 has a circulation hole for circulating hot air. The middle of the placement plate 10 has a connecting hole 11 for blowing preheated hot air into the mold cavity. The connecting hole 11 is located at the bottom of the mold. The bottom sides of the two support frames 9 are fixedly connected with oppositely arranged guide pipes 12. The guide pipes 12 are arc-shaped. The two sets of opposite hot air inlets 6 on both sides of the inner wall of the preheating box 1 are on the same horizontal plane as the mold and the guide pipes 12. The air outlet of the guide pipes 12 faces into the mold cavity. The side wall of the preheating box 1 is rotatably connected to two oppositely arranged box doors 13. The side wall of the preheating box 1 is provided with a convenient component for taking out the die-casting mold in the placement rack 8 to avoid burns. When the preheating component is in use, after the hot air blower 2 is started, the input end of the hot air blower 2 is connected to the inner wall of the preheating box 1, and the output end is connected to the connecting nozzle 4 through the dual flow pipe 3, so that the high temperature air is delivered to the distribution chamber 5. The hot air in the distribution chamber 5 is evenly blown onto the die-casting mold and the guide pipe 12 placed on the placement rack 8 through two sets of opposite preheating air outlets 6 opened between the inner wall of the preheating box 1 and the distribution chamber 5, so as to achieve preliminary preheating. The preliminary preheating heats the air to about 80℃~100℃ and lasts for about 10~15 minutes. In the early stage of preheating, i.e. low temperature stage, the hot air generated by the hot air blower 2 is relatively low in temperature, which can dispel moisture on the mold surface and reduce the risk of thermal shock. At the same time, the temperature controller 7 precisely adjusts the hot air blower 2 to ensure uniform airflow in the low temperature stage, so that the mold can gradually heat up without producing surface cracks. After entering the medium temperature stage, the hot air temperature rises to 150℃~200℃ and lasts for 20~25 minutes. The flow distribution chamber 5 and the preheating air outlet 6 continue to deliver air evenly. The high temperature air is blown directly into the mold cavity through the connecting hole 11 at the top of the placement plate 10, so that the temperature inside the mold gradually increases and tends to be uniform. During this stage, the two support frames 9 support the placement plate 10 and ensure the mold is fixed in position. The arc-shaped structure at the bottom of the guide pipe 12 guides the flow of hot air, ensuring that the hot air fully covers the inside of the mold cavity, thereby achieving uniform heating. Finally, the high-temperature stage begins, where the air is heated to 250℃~300℃ for 15~20 minutes. Under the guidance of the flow chamber 5 and the guide pipe 12, the mold on the placement rack 8 achieves overall high-temperature stability, ensuring the filling performance and surface quality of the casting during the die casting process. At the same time, it reduces the thermal shock caused by direct contact between the cold mold and the high-temperature molten metal. Throughout the process, the hot air blower 2 draws the high-temperature air from the preheating box 1 into the hot air blower 2, reheats it, and blows it into the box, thus forming a continuous and uniform flow of hot air. The placement rack 8 and the support frame 9 ensure the support of the mold, and the guide pipe 12 optimizes the direction of the hot air, so that the segmented preheating is completed from low-temperature dehumidification, medium-temperature uniform heating to high-temperature stability, achieving high efficiency, safety, and uniformity in mold preheating.

[0023] Further, please refer to the attached diagram. Figures 1 to 5As shown, the convenient assembly includes two electric telescopic rods 14 rotatably connected to the top of the preheating box 1. The telescopic ends of the two electric telescopic rods 14 are rotatably connected to the top of the two boxes 13 respectively. Two guide rails 15 are fixedly connected to the side wall of the preheating box 1. Two sets of guide rail wheels 16 are fixedly connected to the bottom of the placement rack 8. When the two sets of placement racks 8 move to the top of the guide rails 15, the two sets of guide rail wheels 16 are respectively rolled and connected to the top of the two guide rails 15. The guide rail wheels 16 and the guide rails 15 are adapted to each other. A linkage plate 17 is fixedly connected to the side wall of the box door 13 near the temperature controller 7. The linkage plate 17 is located at the bottom of the placement rack 8. The linkage plate 17 has a Z-shaped structure. A sliding groove 18 is opened on the side wall of the linkage plate 17. A rotating column 19 is rotatably connected to the bottom of the placement rack 8. The rotating column 19 is rolled and connected inside the sliding groove 18. After the mold is preheated, the assembly can be used to safely and conveniently remove the mold placed on the placement rack 8. During operation, the two doors 13 are opened synchronously by controlling the extension and retraction of the electric telescopic rod 14. The door 13 closer to the temperature controller 7 drives the linkage plate 17 to rotate along the rotation axis of the door 13. During the rotation, the linkage plate 17 drives the rotating column 19 to roll through the slide groove 18, so that the placement rack 8 is evenly and smoothly moved along the interior of the preheating box 1 to the end of the guide rail 15 away from the box body. Once the placement rack 8 is completely removed from the housing, the operator can directly remove the mold from it without manual handling or the use of external clamping tools. This avoids the risk of burns in high-temperature environments and significantly reduces labor intensity. This convenient retrieval mechanism not only improves the safety of mold handling but also optimizes the operation process. Compared to manually approaching the housing for handling or using a trolley to push the mold out, it is more efficient and reliable, meeting the actual needs of die-casting production for mold safety and ease of operation. It also reduces operational difficulties and potential safety hazards caused by heat leakage from high temperatures.

Claims

1. A multi-stage thermal control preheating device for die casting molds, comprising a preheating box (1), characterized in that: A preheating assembly is provided on the top of the preheating box (1). The preheating assembly includes a hot air blower (2) fixedly connected to the top of the preheating box (1). The input end of the hot air blower (2) is connected to the inner wall of the preheating box (1). The output end of the hot air blower (2) is connected to a dual-flow pipe (3). Both ends of the dual-flow pipe (3) are fixedly connected to connectors (4). A flow divider (5) is provided on the inner wall of the preheating box (1). Two sets of flow dividers are provided between the inner walls of both sides of the preheating box (1) and the inner walls of the flow divider (5). The two connecting nozzles (4) are connected to the top of the diversion chamber (5) and the preheating air outlet (6) are respectively connected. The side wall of the preheating box (1) is fixedly equipped with a temperature controller (7) for controlling the hot air blower (2). The interior of the preheating box (1) is equipped with a placement rack (8) for placing the die-casting mold. The side wall of the preheating box (1) is rotatably connected with two oppositely arranged box doors (13). The side wall of the preheating box (1) is equipped with a convenient component for taking out the die-casting mold in the placement rack (8) to avoid burns.

2. The multi-stage thermal control preheating device for die-casting molds according to claim 1, characterized in that, The convenient assembly includes two electric telescopic rods (14) rotatably connected to the top of the preheating box (1), the telescopic ends of the two electric telescopic rods (14) being rotatably connected to the top of the two box doors (13), the side wall of the preheating box (1) being fixedly connected to two guide rails (15), and the bottom of the placement rack (8) being fixedly connected to two sets of guide rail wheels (16).

3. The multi-stage thermal control preheating device for die-casting molds according to claim 2, characterized in that, A linkage plate (17) is fixedly connected to the side wall of the box door (13) near the temperature controller (7). The linkage plate (17) is located at the bottom of the placement rack (8). The linkage plate (17) has a Z-shaped structure. A sliding groove (18) is provided on the side wall of the linkage plate (17). A rotating column (19) is rotatably connected to the bottom of the placement rack (8). The rotating column (19) is rotatably connected inside the sliding groove (18).

4. The multi-stage thermal control preheating device for die-casting molds according to claim 3, characterized in that, Two support frames (9) are fixedly connected between the inner walls of the placement rack (8). Each of the two support frames (9) has a placement plate (10) for placing the die-casting mold on its top. The top of the placement plate (10) has a flow hole for circulating hot air.

5. The multi-stage thermal control preheating device for die-casting molds according to claim 4, characterized in that, The middle part of the placement plate (10) has a connecting hole (11) for blowing hot air into the mold cavity for preheating.

6. The multi-stage thermal control preheating device for die-casting molds according to claim 4, characterized in that, Both of the two support frames (9) are fixedly connected to oppositely arranged guide pipes (12) on their bottom sides. The guide pipes (12) are arc-shaped and the air outlet end of the guide pipes (12) faces into the mold cavity.

7. The multi-stage thermal control preheating device for die-casting molds according to claim 2, characterized in that, When the two sets of placement racks (8) move to the top of the guide rails (15), the two sets of guide rail wheels (16) are respectively rolled and connected to the top of the two guide rails (15), and the guide rail wheels (16) and the guide rails (15) are adapted to each other.

8. A multi-stage thermal control preheating device for die-casting molds according to claim 6, characterized in that, The two sets of opposite hot air vents (6) on both sides of the inner wall of the preheating box (1) are on the same horizontal plane as the mold and the guide pipe (12).

9. A multi-stage thermal control preheating device for die-casting molds according to claim 5, characterized in that, The connecting hole (11) is located at the bottom of the mold.

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