A sand layer solidification accelerating device for a large cast iron mold sand coating process

Abstract

This utility model relates to the technical field of iron mold sand casting equipment, and discloses a sand layer solidification acceleration device for the large casting iron mold sand coating process. It includes a base, an iron mold sand coating mold mounted on the upper side of the base, an insulation layer fixedly connected to one side of the iron mold sand coating mold, and a cooling tower fixedly connected to one side of the insulation layer. Multiple heat-conducting rods are mounted on the insulation layer, with one end of each heat-conducting rod fixedly connected to one side of the iron mold sand coating mold. This utility model conducts heat through the contact between the multiple heat-conducting rods and the back side of the iron mold sand coating mold. The insulation layer prevents direct contact between the heat-conducting oil and the iron mold sand coating mold. Simultaneously, the heat-conducting rods transfer heat from the iron mold sand coating mold to the heat-conducting oil below the cooling tower, thus preventing the low-temperature heat-conducting oil from directly contacting the high-temperature iron mold sand coating mold, which could cause rapid cooling and lead to cracking and deformation.

Description

Technical Field

[0001] This utility model relates to the technical field of iron mold sand casting equipment, and in particular to a sand layer solidification acceleration device for the sand coating process of large casting iron molds. Background Technology

[0002] The process of casting iron molds with sand coating involves uniformly mixing phenolic resin and curing agents such as hexamethylenetetramine with molding sand, and then injecting the molding sand into the mold cavity by layering and compacting the sand coating under a sand injection pressure (0.15-0.6MPa). It is important to note that the curing stage needs to be adjusted according to the fluidity of the coated sand to ensure that the compaction degree reaches above 90 degrees. After the sand coating is completed, it needs to be baked at a low temperature (100-250°C) for 2 hours to promote the stability of the sand layer. After completion, the iron mold needs to be cooled. However, existing cooling devices for casting iron molds with sand coating generally suffer from the problem of rapid cooling during the cooling process.

[0003] For example, Chinese utility model patent CN216421042U discloses a cooling machine for iron mold sand casting. Although this iron mold sand casting cooling machine has the advantages of convenient use and high cooling water utilization, directly spraying cold water onto the iron mold casting through the spray head will cause cracks due to excessive temperature difference between the shell and the internal casting. In addition, the violent cooling method of rapid cooling may also lead to shrinkage and deformation of the iron mold. Based on this, a sand layer solidification acceleration device for the sand coating process of large casting iron mold is proposed to solve the above problems. Utility Model Content

[0004] To address the technical problem of cooling equipment for iron mold sand coating, this utility model provides a sand layer solidification acceleration device for the sand coating process of large casting iron molds.

[0005] This utility model is achieved using the following technical solution: a sand layer curing acceleration device for the sand coating process of large casting iron molds, comprising a base, an iron mold sand coating mold mounted on the upper side of the base, an insulation layer fixedly connected to one side of the iron mold sand coating mold, a cooling tower fixedly connected to one side of the insulation layer, a plurality of heat-conducting rods mounted on the insulation layer, one end of each heat-conducting rod being fixedly connected to one side of the iron mold sand coating mold, and the other end of the heat-conducting rod being located inside the cooling tower, the cooling tower being provided with a cooling and heat dissipation mechanism for dissipating heat transfer oil, and an LED industrial control panel mounted on one side of the base.

[0006] As a further improvement to the above solution, the cooling and heat dissipation mechanism includes multiple inner leakage baffles fixedly connected to the inner side of the cooling tower. Each inner leakage baffle has an inner leakage slot at its center. Between every two inner leakage baffles, there is an outer leakage baffle fixedly connected to the inner side of the cooling tower. Each outer leakage baffle has multiple outer leakage slots at its outer edge. The multiple outer leakage slots are arranged in a circumferential array. A heat transfer oil circulation mechanism is provided on the outer side of the cooling tower. A rake-type stirring mechanism is provided on the upper side of each inner and outer leakage baffle.

[0007] As a further improvement to the above solution, the heat transfer oil circulation mechanism includes a return pipe that communicates with the outer side of the bottom of the cooling tower, and a pump body is connected to the upper end of the return pipe. One side of the output end of the pump body is connected to the upper side of the cooling tower.

[0008] As a further improvement to the above solution, the rake-type stirring mechanism includes a vertically arranged air duct inside the cooling tower cylinder, the lower end of the air duct being rotatably connected to the lower side of the cooling tower cylinder, and a dynamic sealing assembly being provided between the lower port of the air duct and the lower side of the cooling tower cylinder, a fan heat dissipation mechanism being provided at the lower end of the air duct, a limit support mechanism being provided at the upper end of the air duct, and a rake-type heat dissipation mechanism being provided on the outer side of the air duct.

[0009] As a further improvement to the above solution, the fan cooling mechanism includes a fan connected to the lower side of the cooling tower, the exhaust port of the fan being connected to the lower end of the air duct, and a protective cover being installed at the upper end of the air duct.

[0010] As a further improvement to the above solution, the limiting support mechanism includes a ventilation cover plate fixedly connected to the upper side of the cooling tower cylinder. The ventilation cover plate has multiple ventilation slots, and the upper side of the ventilation cover plate is provided with a duct drive mechanism for rotating the duct.

[0011] As a further improvement to the above solution, the rake-type heat dissipation mechanism includes multiple positive rake teeth that are slidably connected to the upper side of each inner leak partition. The multiple positive rake teeth are distributed in a circumferential array, and the ends of the multiple positive rake teeth that are close to each other are fixedly connected to the outside of the air duct. The upper side of each outer leak partition is slidably connected to multiple reverse rake teeth that are distributed in a circumferential array. The ends of each reverse rake tooth that are close to each other are fixedly connected to the outside of the air duct.

[0012] As a further improvement to the above solution, the duct drive mechanism includes a motor mounted on the upper side of the ventilation cover plate, the output end of the motor is fixedly connected to a first pulley, a second pulley is fixedly connected to the upper outer side of the duct, and a transmission belt is provided between the second pulley and the first pulley.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. This utility model conducts heat through multiple heat-conducting rods in contact with the back side of the iron mold sand coating mold. The insulation layer prevents the heat-conducting oil from directly contacting the iron mold sand coating mold. At the same time, the heat-conducting rods can transfer the heat of the iron mold sand coating mold to the heat-conducting oil below the cooling tower, thereby preventing the low-temperature heat-conducting oil from directly contacting the high-temperature iron mold sand coating mold, which would cause a rapid cooling phenomenon leading to cracks and deformation.

[0015] 2. The fan of this utility model blows air upward from the lower end of the air duct. The cold air can absorb heat from the cooling tower and then be discharged from the protective cover. At the same time, the rotation of the air duct drives the reverse rake teeth and forward rake teeth to rotate, which agitates the heat transfer oil flowing from top to bottom, expands the heat dissipation area, and dissipates the heat absorbed by the heat transfer oil into the interior of the cooling tower. Under the action of thermal expansion and contraction, the heat can flow upward along the outer and inner leakage slots and finally be discharged from the ventilation cover. Through the above two methods of heat dissipation, the sand layer solidification acceleration device not only dissipates heat from the heat transfer oil efficiently, but also controls the rotation speed of the air duct by the motor, making the working efficiency of the entire solidification acceleration device more flexible. Attached Figure Description

[0016] Figure 1 A schematic diagram of the overall structure of a sand layer solidification acceleration device for a large casting iron mold sand coating process provided by this utility model.

[0017] Figure 2 for Figure 1 Top view;

[0018] Figure 3 for Figure 1 A sectional view;

[0019] Figure 4 for Figure 1 A schematic diagram of the internal structure.

[0020] Explanation of key symbols:

[0021] 1. Base; 2. LED industrial control panel; 3. Cooling tower; 4. Motor; 5. No. 1 pulley; 6. Protective cover; 7. Pump body; 8. Ventilation cover; 9. Air duct; 10. Iron mold sand coating mold; 11. Fan; 12. Return pipe; 13. No. 2 pulley; 14. Conveyor belt; 15. Positive rake teeth; 16. Reverse rake teeth; 17. Inner leakage partition; 18. Outer leakage partition; 19. Outer leakage slot; 20. Inner leakage slot; 21. Dynamic sealing assembly; 22. Heat conduction rod; 23. Insulation layer. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0023] Example:

[0024] Please combine Figures 1-3 This embodiment of a sand layer curing acceleration device for a large casting iron mold sand coating process includes a base 1, an iron mold sand coating mold 10 is installed on the upper side of the base 1, and an insulation layer 23 is fixedly connected to one side of the iron mold sand coating mold 10. The insulation layer 23 can be made of an insulation solid material, such as ceramic fiber, which has high temperature resistance. At this time, the iron mold sand coating mold 10 can only diffuse along the heat conduction rod 22 to one end, thus avoiding direct contact between the heat conduction oil and the iron mold sand coating mold 10, which would cause a rapid cooling phenomenon and damage the mold.

[0025] Please combine Figure 3 As shown, a cooling tower cylinder 3 is fixedly connected to one side of the insulation layer 23, and multiple heat-conducting rods 22 are installed on the insulation layer 23. In this embodiment, the heat-conducting rods 22 are graphite heat-conducting plates, which have excellent thermal conductivity.

[0026] Please combine Figure 3 As shown, one end of each heat-conducting rod 22 is fixedly connected to one side of the iron mold sand coating mold 10, and the other end of the heat-conducting rod 22 is located inside the cooling tower cylinder 3. The cooling tower cylinder 3 is equipped with a cooling and heat dissipation mechanism for dissipating heat transfer oil. An LED industrial control panel 2 is installed on one side of the base 1, and a temperature sensor is installed on the lower inner side of the cooling tower cylinder 3 near the LED industrial control panel 2. The LED industrial control panel 2 communicates with the sensor, pump body 7, motor 4 and fan 11 to facilitate real-time control of the temperature inside the cooling tower cylinder 3.

[0027] Please combine Figure 3 As shown, in this embodiment, the cooling and heat dissipation mechanism includes two internal leakage baffles 17 fixedly connected to the inner side of the cooling tower cylinder 3. Each internal leakage baffle 17 has an internal leakage slot 20 at its center. The internal leakage slot 20 is located at the exact center of the internal leakage baffle 17 and is circular. Under its own gravity, the heat transfer oil can flow downward along the internal leakage slot 20 and come into contact with the rising air due to thermal expansion and contraction, resulting in heat transfer and carrying away the heat carried by the heat transfer oil.

[0028] Please combine Figure 3As shown, an external drain baffle 18 is provided between every two internal drain baffles 17 and is fixedly connected to the inside of the cooling tower cylinder 3. Each external drain baffle 18 has multiple external drain slots 19 at its outer edge. The heat transfer oil flowing down from the upper layer can be evenly distributed to the multiple external drain slots 19 and flow downward through the multiple circumferentially distributed external drain slots 19, which can significantly increase the heat dissipation area of ​​the heat transfer oil and dissipate heat more fully. At the same time, it can make full contact with the rising air, which can significantly improve the heat exchange performance between the heat transfer oil and the air.

[0029] Please combine Figure 3 As shown, multiple external drain slots 19 are arranged in a circumferential array. A heat transfer oil circulation mechanism is provided on the outside of the cooling tower cylinder 3. A rake-type stirring mechanism is provided on the upper side of each internal drain baffle 17 and external drain baffle 18.

[0030] Please combine Figure 2 As shown, the heat transfer oil circulation mechanism includes a return pipe 12 connected to the outer side of the bottom of the cooling tower 3. The upper end of the return pipe 12 is connected to a pump body 7. One side of the output end of the pump body 7 is connected to the upper side of the cooling tower 3. The heat from the lower part of the cooling tower 3 can be pumped to the upper part of the cooling tower 3 through the return pipe 12, thus completing the heat transfer oil circulation.

[0031] Please combine Figure 3 As shown, the rake-type stirring mechanism includes a vertically arranged air duct 9 inside the cooling tower cylinder 3. The air duct 9 is made of copper, which has excellent heat transfer performance, so as to efficiently absorb heat from the inside of the cooling tower cylinder 3.

[0032] Please combine Figure 3 As shown, the lower end of the air duct 9 is rotatably connected to the lower side of the cooling tower cylinder 3, and a dynamic sealing component 21 is provided between the lower port of the air duct 9 and the lower side of the cooling tower cylinder 3. It should be noted that since the air duct 9 is in a rotating state, while the fan 11 below is in a fixed state, the dynamic sealing component 21 needs to pass through the contact area of ​​the air duct 9 on the lower side of the cooling tower cylinder 3 for dynamic sealing. Dynamic sealing technology is an existing mature technology and is not within the research and protection scope of this utility model.

[0033] The lower end of the air duct 9 is equipped with a fan cooling mechanism, the upper end of the air duct 9 is equipped with a limit support mechanism, and the outer side of the air duct 9 is equipped with a rake-type cooling mechanism.

[0034] Please combine Figure 1 As shown, the fan cooling mechanism includes a fan 11 connected to the lower side of the cooling tower 3. The fan 11 is a centrifugal fan. The exhaust port of the fan 11 is connected to the lower port of the air duct 9. A protective cover 6 is installed at the upper end of the air duct 9.

[0035] Please combine Figure 2As shown, the limiting support mechanism includes a ventilation cover plate 8 fixedly connected to the upper side of the cooling tower 3. The ventilation cover plate 8 has multiple ventilation slots. Through the ventilation slots on the ventilation cover plate 8, the heat inside the cooling tower 3 can be discharged.

[0036] The upper side of the ventilation cover plate 8 is provided with a duct drive mechanism that rotates the duct 9.

[0037] Please combine Figure 3 and Figure 4 As shown, the rake-type heat dissipation mechanism includes multiple positive rake teeth 15 slidably connected to the upper side of each inner leak partition 17. The multiple positive rake teeth 15 are arranged in a circumferential array, and the ends of the multiple positive rake teeth 15 that are close to each other are fixedly connected to the outside of the air duct 9. Multiple negative rake teeth 16 are slidably connected to the upper side of each outer leak partition 18. The multiple negative rake teeth 16 are arranged in a circumferential array, and the ends of the multiple negative rake teeth 16 that are close to each other are fixedly connected to the outside of the air duct 9. The positive rake teeth 15 and the negative rake teeth 16 can stir and push the heat-conducting oil flowing on the inner leak partition 17 and the outer leak partition 18, thereby expanding the heat dissipation area and making it more conducive to the dissipation of heat into the air.

[0038] Please combine Figure 2 As shown, the duct drive mechanism includes a motor 4 installed on the upper side of the ventilation cover plate 8. The output end of the motor 4 is fixedly connected to a first pulley 5. A second pulley 13 is fixedly connected to the outer side of the upper end of the duct 9. A conveyor belt 14 is provided between the second pulley 13 and the first pulley 5.

[0039] The implementation principle of the sand layer solidification acceleration device for the sand coating process of large casting iron mold in this application embodiment is as follows: heat transfer oil is injected into the bottom of the cooling tower cylinder 3, and the maximum depth of the heat transfer oil is controlled to be below the last layer of outer leakage baffle 18. At the same time, all heat transfer rods 22 are immersed. Then, the pump body 7 is started to inject the lower heat transfer oil into the upper part of the cooling tower cylinder 3 along the return pipe 12. At the same time, the heat transfer oil in the upper part of the cooling tower cylinder 3 flows downward along the inner leakage groove 20 on the inner leakage baffle 17. During the process, it is stirred by the reverse rake teeth 16 on the inner leakage baffle 17. Then it continues to flow downward from the outer leakage groove 19 on the outer leakage baffle 18. The heat transfer oil is stirred by the positive rake teeth 15 to expand the heat dissipation area. The heat of the iron mold sand coating mold 10 during cooling is conducted along the heat transfer rods 22 and transferred to the bottom heat transfer oil. The fan 11 is started to inject outside cold air into the air duct 9, which can absorb the heat in the cooling tower cylinder 3 and the bottom heat transfer oil, and discharge it upward from the protective cover 6.

[0040] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A device for accelerating the curing of sand layers in the sand-coating process of large casting iron molds, comprising a base (1), characterized in that, A sand-coating mold (10) is installed on the upper side of the base (1). A heat insulation layer (23) is fixedly connected to one side of the sand-coating mold (10). A cooling tower (3) is fixedly connected to one side of the heat insulation layer (23). Multiple heat-conducting rods (22) are installed on the heat insulation layer (23). One end of each heat-conducting rod (22) is fixedly connected to one side of the sand-coating mold (10), and the other end of the heat-conducting rod (22) is located inside the cooling tower (3). A cooling and heat dissipation mechanism for dissipating heat transfer oil is provided on the cooling tower (3). An LED industrial control panel (2) is installed on one side of the base (1).

2. The sand layer solidification acceleration device for the sand coating process of large casting iron molds as described in claim 1, characterized in that, The cooling and heat dissipation mechanism includes multiple inner leakage baffles (17) fixedly connected to the inner side of the cooling tower (3). Each inner leakage baffle (17) has an inner leakage slot (20) at its center. Between every two inner leakage baffles (17), there is an outer leakage baffle (18) fixedly connected to the inner side of the cooling tower (3). Each outer leakage baffle (18) has multiple outer leakage slots (19) at its outer edge. The multiple outer leakage slots (19) are arranged in a circumferential array. A heat transfer oil circulation mechanism is provided on the outer side of the cooling tower (3). A rake-type stirring mechanism is provided on the upper side of each inner leakage baffle (17) and outer leakage baffle (18).

3. The sand layer solidification acceleration device for the sand coating process of large casting iron molds as described in claim 2, characterized in that, The heat transfer oil circulation mechanism includes a return pipe (12) that is connected to the outer side of the bottom of the cooling tower (3). The upper end of the return pipe (12) is connected to a pump body (7), and one side of the output end of the pump body (7) is connected to the upper side of the cooling tower (3).

4. The sand layer solidification acceleration device for the sand coating process of large casting iron molds as described in claim 2, characterized in that, The rake-type stirring mechanism includes a vertically arranged air duct (9) inside the cooling tower (3). The lower end of the air duct (9) is rotatably connected to the lower side of the cooling tower (3), and a dynamic sealing assembly (21) is provided between the lower port of the air duct (9) and the lower side of the cooling tower (3). A fan heat dissipation mechanism is provided at the lower end of the air duct (9), a limit support mechanism is provided at the upper end of the air duct (9), and a rake-type heat dissipation mechanism is provided on the outer side of the air duct (9).

5. The sand layer solidification acceleration device for the sand coating process of large casting iron molds as described in claim 4, characterized in that, The fan cooling mechanism includes a fan (11) connected to the lower side of the cooling tower (3), the exhaust port of the fan (11) is connected to the lower port of the air duct (9), and a protective cover (6) is installed at the upper end of the air duct (9).

6. The sand layer solidification acceleration device for the sand coating process of large casting iron molds as described in claim 4, characterized in that, The limiting support mechanism includes a ventilation cover plate (8) fixedly connected to the upper side of the cooling tower (3). The ventilation cover plate (8) has multiple ventilation slots. The upper side of the ventilation cover plate (8) is provided with a duct drive mechanism that rotates the duct (9).

7. The sand layer solidification acceleration device for the sand coating process of large casting iron molds as described in claim 4, characterized in that, The rake-type heat dissipation mechanism includes multiple positive rake teeth (15) slidably connected to the upper side of each inner leak partition (17). The multiple positive rake teeth (15) are arranged in a circumferential array, and the ends of the multiple positive rake teeth (15) that are close to each other are fixedly connected to the outside of the air duct (9). Multiple negative rake teeth (16) are slidably connected to the upper side of each outer leak partition (18). The multiple negative rake teeth (16) are arranged in a circumferential array, and the ends of the multiple negative rake teeth (16) that are close to each other are fixedly connected to the outside of the air duct (9).

8. The sand layer solidification acceleration device for the sand coating process of large casting iron molds as described in claim 6, characterized in that, The duct drive mechanism includes a motor (4) installed on the upper side of the ventilation cover (8). The output end of the motor (4) is fixedly connected to a first pulley (5). A second pulley (13) is fixedly connected to the outer side of the upper end of the duct (9). A conveyor belt (14) is provided between the second pulley (13) and the first pulley (5).

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