Water-cooled sand core preparation equipment
By introducing a cooling chamber and coolant into the sand core preparation equipment to cut off the heat conduction path, and combining it with hot gas preheating, the problem of premature curing of resin sand was solved, thereby improving the quality and production stability of sand cores.
Patent Information
- Application Number
- CN202511388528.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-26
- Publication Date
- 2025-12-16
AI Technical Summary
In existing sand core preparation equipment, high-temperature core boxes cause premature curing of resin sand, leading to sand shooting failures and poor sand core quality, which affects production continuity and precision.
A water-cooled sand core preparation device is used. By setting a cooling chamber in the container, the temperature of the resin sand is kept stable by using coolant. The heat conduction path is cut off when the nozzle contacts the core box. Combined with the hot gas preheating and cooling jacket design, the resin sand is prevented from curing prematurely.
It effectively prevents the resin sand from curing prematurely before injection, improves the quality of the sand core and the continuity of production, and ensures the stability and accuracy of the sand injection process.
Smart Images
Figure CN121131682A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of sand core preparation, and in particular to a water-cooled sand core preparation device. Background Technology
[0002] In the foundry industry, sand cores are the core components for forming the internal cavity of castings, and their preparation quality directly determines the dimensional accuracy, surface quality, and internal properties of the castings. Currently, the mainstream sand core preparation process is the hot core box method. This method uses heating to rapidly solidify resin sand into sand cores. Due to its high curing efficiency and ease of integration with automated production lines, it has become the preferred process for mass production of precision castings.
[0003] Existing sand core casting equipment typically includes a receiving device, an injection device, and a core box. During production, the receiving device needs to receive the resin sand, and then the injection device injects the resin sand into the core box in a rhythmic manner. Subsequently, the resin sand in the core box will be formed into a sand core.
[0004] As the casting industry develops towards precision and automation, the market demands for the dimensional accuracy and surface quality of sand cores continue to increase. Therefore, when using the aforementioned equipment to prepare sand cores, it is necessary to ensure that the core box temperature exceeds 200°C and is maintained stably to meet current casting requirements.
[0005] When implementing the hot core box method using existing sand core casting equipment, the high core box temperature may cause the resin sand to solidify prematurely before it is injected, leading to problems such as sand injection failure and poor core quality. When the core box temperature is too high, during the sand injection process, the high temperature of the core box will be continuously conducted to the injection device and then to the receiving device through the contact area between the injection device and the core box. This heat conduction path will cause the resin sand in the receiving device and the injection device to solidify prematurely. The solidified sand particles are prone to accumulate in the injection device, eventually causing blockage and affecting the continuity of production. In addition, because the resin sand is heated in advance, its fluidity will be affected, making it difficult for the resin sand to be effectively and continuously injected into the core box under the preset pressure. This will cause problems such as incomplete sand injection and insufficient sand injection, resulting in the subsequent formed cores not meeting quality requirements. Summary of the Invention
[0006] To prevent the resin sand from curing prematurely before it is ejected, this application provides a water-cooled sand core preparation device.
[0007] The water-cooled sand core preparation equipment provided in this application adopts the following technical solution: A water-cooled sand core preparation device includes a receiving funnel, a discharge cylinder, a container box, and a nozzle connected in sequence. The receiving funnel is configured to receive resin sand and transport the resin sand to the container box through the discharge cylinder. The nozzle is configured to eject the resin sand from the container box. The material container is equipped with a partition that divides the space inside the material container into a cooling chamber and a material container. The cooling chamber is arranged around the outer periphery of the material container. The material container has an inlet and an outlet connected to the cooling chamber. The material container is connected to the discharge cylinder. The nozzle is located on the side of the material container away from the cooling chamber.
[0008] By adopting the above technical solution, the following sand injection action can be achieved: after inserting the nozzle into the core box, the resin sand is injected into the receiving funnel, and the resin sand will reach the material chamber through the discharge cylinder. Then, the resin sand is injected into the core box by the nozzle.
[0009] During sand injection, an external cooling system supplies coolant to the cooling chamber through the inlet, and the coolant is subsequently discharged through the outlet. Firstly, the continuously flowing coolant carries away heat from the resin sand within the container, maintaining a stable resin sand temperature. Secondly, the coolant also cuts off heat conduction. After the nozzle contacts the core box and is heated, the high temperature on the nozzle is conducted through the container towards the discharge cylinder. At this time, the coolant in the cooling chamber continuously carries away the heat conducted through the container structure, thus cutting off heat conduction and preventing premature curing of the resin sand in the discharge cylinder and receiving funnel. Thirdly, the coolant flowing within the cooling chamber carries away heat from the container structure and also prevents heat from the external environment from being conducted from the outside in through the container to the resin sand within the container. Based on these three effects, premature curing of the resin sand before it is injected can be minimized.
[0010] Preferably, a first cylinder is installed on the outer wall of the discharge cylinder, and a venting cavity is formed between the first cylinder and the discharge cylinder. The first cylinder is equipped with an air inlet and an exhaust assembly. The air inlet is used to introduce hot air into the venting cavity, and the exhaust assembly is used to exhaust the hot air in the venting cavity. The receiving funnel is equipped with an on / off valve. The discharge cylinder has a vent hole that connects the inside of the discharge cylinder with the venting cavity. The vent hole is equipped with a baffle, which is configured to allow gas to pass through and to block resin sand.
[0011] By adopting the above technical solution, after the resin sand is injected into the discharge cylinder and the receiving box, the opening and closing valve is driven to close the receiving funnel. At this time, the external hot air generating device is used to inject hot air into the ventilation chamber through the air inlet. The hot air will pass through the baffle and reach the discharge cylinder to complete the effective preheating of the resin sand. This can improve the quality of the resin sand after it enters the core box and is formed into a sand core. In addition, the exhaust component can discharge excess hot air.
[0012] Preferably, the exhaust assembly includes an exhaust pipe connected to the first cylinder, the exhaust pipe is mounted with a mounting base, the mounting base is mounted with an elastic opening and closing plate, an air cavity is formed between the elastic opening and closing plate and the mounting base, and the mounting base is also mounted with a vent connector to facilitate ventilation into the air cavity. When gas is introduced into the air chamber, the elastic sealing plate deforms and seals the exhaust pipe opening; when no gas is introduced into the air chamber, the elastic sealing plate deforms and resets, allowing the exhaust pipe opening to connect with the external environment.
[0013] By adopting the above technical solution, during the preheating of resin sand, air is supplied to the air chamber through an external air supply device via an air inlet, thereby causing the elastic opening and closing plate to deform and block the outlet of the exhaust pipe. After the resin sand preheating is completed, the external air supply device stops supplying air to the air chamber, and the elastic opening and closing plate deforms and resets, allowing the outlet of the exhaust pipe to connect with the external environment. At this time, the hot air in the discharge cylinder also helps the elastic opening and closing plate deform and reset, and the hot air is discharged through the exhaust pipe.
[0014] Preferably, a second cylinder is installed on the outer wall of the first cylinder, a first cooling interlayer is formed between the second cylinder and the first cylinder, and the second cylinder has an inlet and an outlet communicating with the first cooling interlayer.
[0015] By adopting the above technical solution, an external refrigeration device is used to supply coolant to the first cooling jacket through the inlet and discharge it through the outlet. The coolant will carry away the heat on the first and second cylinders, thereby further cutting off the heat conduction path. Of course, this design is also used to prevent the heat from the external environment from being conducted to the discharge cylinder through the first and second cylinders, thereby causing the resin sand in the discharge cylinder to be heated.
[0016] Preferably, a drive component is installed on the first cylinder, an observation hole is opened in the discharge cylinder, the drive component is connected to a height measuring component and a sealing head, and the drive component is configured to drive the sealing head to rotate to open and close the observation hole and drive the height measuring component to rotate to detect the height of resin sand in the discharge cylinder through the observation hole.
[0017] By adopting the above technical solution, under normal conditions, the sealing head closes the observation hole. When resin sand is injected into the discharge cylinder, the drive component drives the sealing head to open the observation hole and drives the height measuring component to rotate to one side of the observation hole, thereby detecting the height of the resin sand in the discharge cylinder to determine the amount of resin sand injected.
[0018] Preferably, the receiving funnel includes a discharge port in the middle that communicates with the discharge cylinder and a second liquid-cooled jacket surrounding the discharge port. The receiving funnel has an inlet and an outlet that communicate with the second cooling jacket.
[0019] By adopting the above technical solution, an external refrigeration device is used to inject coolant into the second liquid-cooled jacket through the inlet and discharge it through the outlet. The coolant can carry the heat on the receiving funnel to cool the resin sand in contact with the receiving funnel. Of course, this structural design is also used to prevent the heat from the external environment from being conducted to the resin sand through the receiving funnel.
[0020] Preferably, it includes a first frame, on which a reciprocating drive assembly is mounted, and a second frame is mounted on the reciprocating drive assembly. The second frame is equipped with a liquid cooling assembly and an air blowing assembly. The reciprocating drive assembly is configured to drive the air blowing assembly to one side of the core box to blow air into the core box, and the liquid cooling assembly is configured to cool the air blowing assembly.
[0021] By adopting the above technical solution, during the sand core forming process within the core box, the second frame can be moved by driving the reciprocating drive assembly, which then causes the air blowing assembly to blow air into the core box. This not only removes the hot air from the core box to accelerate cooling and improve the quality of the sand core, but also blows out volatile gases and prevents the sand core from sticking to the core box. The liquid cooling assembly prevents the temperature on the core box from being conducted to the second frame or even other structures via the air blowing assembly when the air blowing assembly is blowing air into the core box.
[0022] Preferably, the air blowing assembly includes an air blowing plate installed on the second frame. The air blowing plate includes an internal air storage chamber and an air inlet and an air outlet communicating with the air storage chamber. The air blowing plate is also equipped with a nozzle communicating with the air outlet.
[0023] By adopting the above technical solution, an external air blowing device blows air into the air storage chamber through the air inlet and discharges it through the nozzle. The nozzle facilitates blowing air into the core box.
[0024] Preferably, the liquid cooling assembly includes a liquid cooling plate mounted on the air blowing plate, the liquid cooling plate including an internal liquid cooling channel and a liquid inlet and a liquid outlet communicating with the liquid cooling channel.
[0025] By adopting the above technical solution, an external liquid cooling device is used to inject coolant into the liquid cooling channel through the liquid inlet and discharge it through the liquid outlet. The coolant can carry away the heat on the liquid cooling plate.
[0026] In summary, the present invention has at least one of the following beneficial technical effects: 1. This application enables the following sand-shooting action: After the nozzle is inserted into the core box, resin sand is injected into the receiving funnel. The resin sand then passes through the discharge cylinder to the receiving chamber, and is subsequently ejected into the core box by the nozzle. During sand-shooting, an external cooling device supplies liquid to the cooling chamber through the inlet, and the coolant is discharged through the outlet. Firstly, the continuously flowing coolant carries away the heat from the resin sand in the receiving chamber to maintain a stable temperature. Secondly, the coolant also cuts off the heat conduction path. After the nozzle contacts the core box and is heated, the high temperature on the nozzle is conducted through the receiving chamber towards the discharge cylinder. At this time, the coolant in the cooling chamber continuously carries away the heat conducted on the structure of the receiving chamber, thus completing the heat conduction cut-off and preventing the resin sand in the discharge cylinder and receiving funnel from premature curing due to heat. Thirdly, the coolant flowing in the cooling chamber carries away the heat from the structure of the receiving chamber and also prevents heat from the external environment from being conducted from the outside to the inside of the receiving chamber to the resin sand in the receiving chamber. Based on the above three effects, premature curing of the resin sand before it is injected can be prevented as much as possible. 2. After the resin sand is injected into the discharge cylinder and the receiving box, the opening and closing valve is driven to close the receiving funnel. At this time, hot air is injected into the ventilation chamber through the air inlet by using an external hot air generator. The hot air will pass through the baffle and reach the discharge cylinder to complete the effective preheating of the resin sand. This can improve the quality of the resin sand after it enters the core box and is formed into a sand core. In addition, the exhaust component can discharge excess hot air. 3. Using an external refrigeration device, coolant is supplied to the first cooling jacket through the inlet and discharged through the outlet. The coolant carries away the heat from the first and second cylinders, thereby further cutting off the heat conduction path. Of course, this design also prevents heat from the external environment from being conducted to the discharge cylinder through the first and second cylinders, thus causing the resin sand inside the discharge cylinder to heat up. Using an external refrigeration device, coolant is injected into the second liquid-cooled jacket through the inlet and discharged through the outlet. The coolant can carry away the heat on the receiving funnel, thereby cooling the resin sand in contact with the receiving funnel. Similarly, this structural design also prevents heat from the external environment from being conducted to the resin sand through the receiving funnel. Attached Figure Description
[0027] Figure 1 This is a schematic diagram of the overall structure of a water-cooled sand core preparation device according to an embodiment of this application; Figure 2 This is a cross-sectional view used to illustrate the material discharge cylinder; Figure 3 This is a schematic diagram illustrating the structure of the material discharge cylinder; Figure 4 It is a cross-sectional view used to show the cooling chamber; Figure 5 yes Figure 2 A magnified view of part A in the middle; Figure 6This is a structural diagram used to illustrate the feed inlet; Figure 7 This is a structural diagram illustrating the air blowing assembly; Figure 8 This is a structural diagram illustrating the chute; Figure 9 It is a cross-sectional view used to illustrate the gas storage chamber and the liquid cooling channel.
[0028] In the attached diagram, the following are labeled: 1. Frame; 2. Receiving funnel; 21. On / off valve; 22. Discharge port; 23. Second liquid cooling jacket; 231. Inlet; 232. Outlet; 3. Drop cylinder; 31. First cylinder; 32. Vent chamber; 33. Air inlet; 34. Vent hole; 341. Plug; 35. Exhaust assembly; 351. Exhaust pipe; 352. Mounting base; 353. Elastic opening / closing plate; 354. Air chamber; 355. Vent connector; 36. Observation hole; 37. Second cylinder; 371. First cooling jacket; 3711. Liquid inlet; 3712. Liquid outlet; 4. Container; 41. Partition; 411. Inclined plate; 412. 42. Broken plate; 43. Cooling chamber; 44. Material holding chamber; 45. Inlet; 46. Outlet; 5. Nozzle; 6. First frame; 61. Reciprocating drive assembly; 611. Belt rotating component; 612. Sliding frame; 6121. Slide groove; 613. Linkage arm; 614. Pulley; 62. Second frame; 63. Air blowing assembly; 631. Air blowing plate; 6311. Air storage chamber; 6312. Air inlet; 6313. Air outlet; 632. Nozzle; 64. Liquid cooling assembly; 641. Liquid cooling plate; 6411. Liquid cooling channel; 6412. Liquid inlet; 6413. Liquid outlet; 7. Drive component; 71. Height measuring component; 72. Sealing head. Detailed Implementation
[0029] The present invention will be further described in detail below with reference to the accompanying drawings.
[0030] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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. Therefore, they should not be construed as limiting this invention.
[0031] This application discloses a water-cooled sand core preparation device. It is used to prevent resin sand from curing prematurely before it is injected into the core box.
[0032] Reference Figure 1 , Figure 2 and Figure 3A water-cooled sand core preparation device includes a frame 1. From top to bottom, the frame 1 is equipped with a receiving funnel 2, a discharge cylinder 3, a container 4, and a nozzle 5 connected in sequence. The nozzle 5 has a self-opening and closing function. The specific structure of the nozzle 5 is prior art and will not be described in detail here. The receiving funnel 2 can collect resin sand and transport it through the discharge cylinder 3 to the container 4. The nozzle 5 can eject the resin sand from the container 4 into the core box, which is generally placed below the nozzle 5. A first frame 6 is also installed on the frame 1. The first frame 6 is equipped with a reciprocating drive assembly 61. A second frame 62 is installed on the reciprocating drive assembly 61, and an air blowing assembly 63 is installed on the second frame 62. The reciprocating drive assembly 61 can drive the air blowing assembly 63 to one side of the core box to blow air into the core box.
[0033] The core box is moved so that the nozzle 5 is inserted into the core box, and resin sand is injected into the receiving funnel 2. The resin sand will then pass through the discharge cylinder 3 to the receiving chamber 43, and then be ejected into the core box by the nozzle 5. Subsequently, the core box is moved so that the nozzle 5 is disengaged from the core box, and then the reciprocating drive assembly 61 is driven to move the air blowing assembly 63 to one side of the core box. The air blowing assembly 63 blows air into the core box to help complete the manufacturing of the sand core. It should be noted that the specific structure of the core box and the structure that drives the core box to move are existing technologies and will not be described in detail in this embodiment.
[0034] Reference Figure 2 Figure 4 To prevent premature curing of the resin sand, it is necessary to ensure that the temperature of the resin sand in the receiving funnel 2, the discharge cylinder 3, and the container 4 is moderate. In this application, the container 4 is equipped with a partition 41, which divides the internal space of the container 4 into an outer cooling chamber 42 and an inner container chamber 43. The container chamber 43 is used to hold the resin sand, and the cooling chamber 42 is used to circulate coolant. The cooling chamber 42 is arranged around the outer periphery of the container chamber 43. The container 4 has an inlet 44 and an outlet 45 communicating with the cooling chamber 42. Figure 3 The material receiving chamber 43 is connected to the discharge cylinder 3, and the nozzle 5 is located on the side of the material receiving chamber 43 away from the cooling chamber 42. The nozzle 5 is vertically arranged.
[0035] Reference Figure 4 Specifically, the partition 41 includes a quadrangular inclined plate 411 and a partition plate 412. The partition plate 412 is disposed on one of the inclined plates 411. The inlet 44 is disposed on one side of the partition plate 412 and the outlet 45 is disposed on the other side of the partition plate 412. The partition plate 412 makes the space inside the cooling chamber 42 form a flow channel that is not connected end to end, so that the coolant can reliably flow in from the inlet 44 and flow out from the outlet 45.
[0036] During sand-shooting, an external refrigeration device, such as a chiller, supplies liquid to the cooling chamber 42 through inlet 44, and the coolant is subsequently discharged from outlet 45.
[0037] The above solution has the following effects: First, the continuously flowing coolant carries away the heat from the resin sand in the container cavity 43 to maintain a stable resin sand temperature. Second, the coolant also cuts off the heat conduction path. After the nozzle 5 is heated upon contact with the core box, the high temperature on the nozzle 5 is conducted towards the discharge cylinder 3 via the container box 4. At this time, the coolant in the cooling cavity 42 continuously carries away the heat conducted by the structure of the container box 4, thus completing the heat conduction cut-off and preventing the resin sand in the discharge cylinder 3 and receiving funnel 2 from premature curing due to heat. Third, the coolant flowing in the cooling cavity 42 carries away the heat from the structure of the container box 4 and also prevents heat from the external environment from being conducted from the outside to the inside via the container box 4 to the resin sand in the container cavity 43. Based on the above effects, it is easy to keep the temperature of the resin sand in the receiving funnel 2, discharge cylinder 3, and container box 4 moderate.
[0038] Reference Figure 5 To ensure the quality of the core manufacturing, the resin sand needs to be preheated before being injected into the core box. A first cylinder 31 is installed on the outer wall of the discharge cylinder 3, and a ventilation cavity 32 is formed between the first cylinder 31 and the discharge cylinder 3. Figure 2 and Figure 3 The first cylinder 31 is equipped with an air inlet 33, which is a flange pipe. The air inlet 33 is used to introduce hot air into the ventilation chamber 32. The receiving funnel 2 is equipped with an on / off valve 21, which is preferably a butterfly valve. The on / off valve 21 can open and close the receiving funnel 2. With the cooperation of the self-opening and closing function of the nozzle 5, the on / off valve 21 can seal the space inside the discharge cylinder 3 and the space inside the material box 4. The discharge cylinder 3 has a vent 34, which connects the inside of the discharge cylinder 3 with the ventilation chamber 32. The vent 34 is equipped with a baffle 341, which allows gas to enter the discharge cylinder 3 from the ventilation chamber 32 and prevents resin sand from entering the ventilation chamber 32 from the discharge cylinder 3. In this embodiment, the baffle 341 is preferably a honeycomb vent plug.
[0039] After the resin sand is injected into the discharge cylinder 3 and the receiving box 4, the opening and closing valve 21 is driven to close the receiving funnel 2. At this time, hot air is injected into the ventilation chamber 32 through the air inlet 33 by using an external hot air generator. The hot air will pass through the baffle 341 to reach the discharge cylinder 3 and then reach the receiving chamber 43 to complete the effective preheating of the resin sand. This can improve the quality of the resin sand after it enters the core box and is formed into a sand core.
[0040] Reference Figure 5To prevent hot air from accumulating in the discharge cylinder 3 and the material receiving cavity 43, and to facilitate the discharge of excessive hot air, the first cylinder 31 is equipped with an exhaust assembly 35. The exhaust assembly 35 is used to discharge hot air from the venting cavity 32. Specifically, the exhaust assembly 35 includes an exhaust pipe 351 connected to the first cylinder 31. The exhaust pipe 351 is equipped with a mounting base 352. An elastic opening and closing plate 353 is installed on the mounting base 352. The elastic opening and closing plate 353 is made of polyurethane. An air cavity 354 is formed between the elastic opening and closing plate 353 and the mounting base 352. A vent connector 355 is also installed on the mounting base 352 to facilitate ventilation into the air cavity 354.
[0041] During resin sand preheating, on the one hand, it is necessary to ensure that the receiving funnel 2 is closed by the on / off valve 21, and on the other hand, air is supplied to the air chamber 354 through the air connector 355 by the external air supply device, so that the elastic opening and closing plate 353 deforms and blocks the opening of the exhaust pipe 351. After the resin sand preheating is completed, the external air supply device stops supplying air to the air chamber 354, and the elastic opening and closing plate 353 deforms and resets, so that the opening of the exhaust pipe 351 is connected to the external environment. The hot air in the discharge cylinder 3 and the material receiving chamber 43 can be discharged to the external environment through the opening of the exhaust pipe 351. At this time, the hot air in the discharge cylinder 3 will also help the elastic opening and closing plate 353 deform and reset.
[0042] Reference Figure 3 After the resin sand is injected into the receiving box, the resin sand will pile up into the discharge cylinder 3. In order to facilitate the calculation of the height of the resin sand in the discharge cylinder 3 and thus the amount of resin sand injected, a drive component 7 is installed on the first cylinder 31. The drive component 7 is preferably a swing cylinder. The discharge cylinder 3 has an observation hole 36, which is set vertically. The drive component 7 is connected to a height measuring component 71 and a sealing head 72. The height measuring component 71 is, for example, an ultrasonic sensor or an infrared sensor. The drive component 7 can drive the sealing head 72 to rotate to open and close the observation hole 36 and drive the height measuring component 71 to rotate to detect the height of the resin sand in the discharge cylinder 3 through the observation hole 36.
[0043] Under normal conditions, the sealing head 72 closes the observation hole 36. When resin sand is injected into the discharge cylinder 3 and the amount of resin sand needs to be calculated, the drive component 7 drives the sealing head 72 to open the observation hole 36 and drives the height measuring component 71 to rotate to one side of the observation hole 36 to detect the height of the resin sand in the discharge cylinder 3 and determine the amount of resin sand injected. In this embodiment, the action of the sealing head 72 to release the closure of the observation hole 36 and the action of rotating the height measuring component 71 to the top of the observation hole 36 are performed simultaneously.
[0044] Reference Figure 5 and Figure 6In order to further prevent the resin sand in the discharge cylinder 3 from curing prematurely, a second cylinder 37 is installed on the outer wall of the first cylinder 31. A first cooling interlayer 371 is formed between the second cylinder 37 and the first cylinder 31. The second cylinder 37 has an inlet 3711 and an outlet 3712 that are connected to the first cooling interlayer 371.
[0045] Reference Figure 3 and Figure 6 and combined Figure 2 The receiving funnel 2 includes a discharge port 22 connected to the discharge cylinder 3 in the middle and a second liquid cooling jacket 23 surrounding the outside of the discharge port 22. The receiving funnel 2 has an inlet 231 and an outlet 232 connected to the second cooling jacket.
[0046] An external cooling device supplies coolant to the first cooling jacket 371 through the inlet 3711 and discharges it through the outlet 3712. The coolant carries away the heat from the first cylinder 31 and the second cylinder 37, thereby further cutting off the heat conduction path. Of course, this design is also used to prevent the heat from the external environment from being conducted to the discharge cylinder 3 through the first cylinder 31 and the second cylinder 37, thereby causing the resin sand in the discharge cylinder 3 to be heated.
[0047] Using an external refrigeration device, coolant is injected into the second liquid-cooled jacket 23 through the inlet 231 and discharged through the outlet 232. The coolant can carry away the heat on the receiving funnel 2, thereby cooling the resin sand in contact with the receiving funnel 2. Similarly, this structural design is also used to prevent the heat from the external environment from being conducted to the resin sand through the receiving funnel 2.
[0048] Reference Figure 7 and Figure 8 The reciprocating drive assembly 61 includes a rotating component 611 mounted on the first frame 6, such as a motor. A sliding frame 612 is slidably connected to the first frame 6. The sliding frame 612 has a sliding groove 6121. The rotating component 611 is connected to a linkage arm 613. The linkage arm 613 is rotatably connected to a pulley 614. The pulley 614 is slidably connected to the sliding groove 6121. The rotating component 611 can drive the linkage arm 613 to rotate, thereby driving the pulley 614 to rotate around the rotating component 611, which in turn drives the sliding frame 612 to move on the first frame 6. At this time, the pulley 614 will also slide in the sliding groove 6121. The second frame 62 is mounted on the sliding frame 612.
[0049] Reference Figure 7 and Figure 9 The air blowing assembly 63 includes an air blowing plate 631 installed on the second frame 62. The air blowing plate 631 includes an internal air storage chamber 6311 and an air inlet 6312 and an air outlet 6313 connected to the air storage chamber 6311. The air blowing plate 631 is also equipped with a nozzle 632 connected to the air outlet 6313.
[0050] An external air blowing device blows air into the air storage chamber 6311 through the air inlet 6312 and discharges it through the nozzle 632. The nozzle 632 facilitates blowing air into the core box. Blowing air can remove the hot air in the core box to accelerate cooling and improve the quality of the sand core. On the other hand, it can also blow out volatile gases and prevent the sand core from sticking to the core box.
[0051] Reference Figure 9 To prevent heat from the core box from being conducted to various structures of this application when the nozzle 632 blows air onto the core box, a liquid cooling assembly 64 is installed on the second frame 62. Specifically, the liquid cooling assembly 64 includes a liquid cooling plate 641 mounted on the air blowing plate 631. The liquid cooling plate 641 includes an internal liquid cooling channel 6411 and a liquid inlet 6412 and a liquid outlet 6413 communicating with the liquid cooling channel 6411.
[0052] An external liquid cooling device is used to inject coolant into the liquid cooling channel 6411 through the liquid inlet 6412 and discharge it through the liquid outlet 6413. The coolant can carry away the heat on the liquid cooling plate 641, thereby cutting off the heat conduction path.
[0053] The implementation principle of a water-cooled sand core preparation device in this application embodiment is as follows: the core box is moved so that the nozzle 5 is inserted into the core box, the opening and closing valve 21 is driven to open the receiving funnel 2, and the resin sand is injected into the receiving funnel 2. The resin sand will pass through the dropping cylinder 3 and reach the material chamber 43 and accumulate to the height of the dropping cylinder 3. The driving component 7 drives the sealing head 72 to rotate to release the closure of the observation hole 36 and rotates the height measuring component 71 above the observation hole 36 to measure the height of the resin sand in the dropping cylinder 3. If the calculation meets the requirements, drive the opening and closing valve 21 to close the discharge cylinder 3, drive the drive component 7 to reset the sealing head 72 to close the observation hole 36, connect an external air supply device to the vent connector 355 to ventilate the air chamber 354 so that the elastic opening and closing plate 353 deforms and blocks the opening of the exhaust pipe 351, connect a hot air generating device to the air inlet component 33, and the hot air will enter the vent chamber 32 and then pass through the baffle 341 to reach the discharge cylinder 3 and the material receiving chamber 43 to complete the effective preheating of the resin sand; After preheating, the external air supply device stops supplying air to the air chamber 354, and the elastic opening and closing plate 353 deforms and resets, so that the opening of the exhaust pipe 351 is connected to the external environment, and the hot air in the material discharge cylinder 3 and the material receiving chamber 43 can be discharged to the external environment through the opening of the exhaust pipe 351. The resin sand is injected into the core box using nozzle 5. After the sand injection is completed, the core box is moved so that nozzle 5 is disengaged from the core box. Then, the reciprocating drive assembly 61 is driven to move the air blowing assembly 63 to one side of the core box. An external air blowing device blows air into the air storage chamber 6311 through the air inlet 6312 and discharges it through the nozzle 632. The nozzle 632 is used to blow air into the inside of the core box.
[0054] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.
Claims
1. A water-cooled sand core preparation device, characterized in that: The container includes a receiving funnel (2), a discharge cylinder (3), a container (4), and a nozzle (5) connected in sequence. The receiving funnel (2) is configured to receive resin sand and transport the resin sand through the discharge cylinder (3) to the container (4). The nozzle (5) is configured to eject the resin sand from the container (4). The material container (4) is equipped with a partition (41), which divides the space inside the material container (4) into a cooling chamber (42) and a material container (43). The cooling chamber (42) is arranged around the outer periphery of the material container (43). The material container (4) has an inlet (44) and an outlet (45) connected to the cooling chamber (42). The material container (43) is connected to the discharge cylinder (3). The nozzle (5) is located on the side of the material container (43) away from the cooling chamber (42).
2. The water-cooled sand core preparation equipment according to claim 1, characterized in that: The outer wall of the discharge cylinder (3) is fitted with a first cylinder body (31), and a ventilation cavity (32) is formed between the first cylinder body (31) and the discharge cylinder (3). The first cylinder body (31) is fitted with an air inlet (33) and an exhaust assembly (35). The air inlet (33) is used to introduce hot air into the ventilation cavity (32), and the exhaust assembly (35) is used to exhaust the hot air in the ventilation cavity (32). The receiving funnel (2) is fitted with an on / off valve (21). The discharge cylinder (3) has a ventilation hole (34), which connects the inside of the discharge cylinder (3) with the ventilation cavity (32). The ventilation hole (34) is fitted with a baffle (341), which is configured to allow gas to pass through and to block resin sand.
3. The water-cooled sand core preparation equipment according to claim 2, characterized in that: The exhaust assembly (35) includes an exhaust pipe (351) connected to the first cylinder (31), the exhaust pipe (351) is mounted with a mounting base (352), the mounting base (352) is mounted with an elastic opening and closing plate (353), an air cavity (354) is formed between the elastic opening and closing plate (353) and the mounting base (352), and the mounting base (352) is also mounted with a vent connector (355) to facilitate ventilation into the air cavity (354); When gas is introduced into the air chamber (354), the elastic opening and closing plate (353) deforms and blocks the opening of the exhaust pipe (351); when no gas is injected into the air chamber (354), the elastic opening and closing plate (353) deforms and resets, allowing the opening of the exhaust pipe (351) to communicate with the external environment.
4. The water-cooled sand core preparation equipment according to claim 2, characterized in that: A second cylinder (37) is installed on the outer wall of the first cylinder (31). A first cooling interlayer (371) is formed between the second cylinder (37) and the first cylinder (31). The second cylinder (37) has an inlet (3711) and an outlet (3712) connected to the first cooling interlayer (371).
5. The water-cooled sand core preparation equipment according to claim 2, characterized in that: A drive component (7) is installed on the first cylinder (31). The discharge cylinder (3) has an observation hole (36). The drive component (7) is connected to a height measuring component (71) and a sealing head (72). The drive component (7) is configured to drive the sealing head (72) to rotate to open and close the observation hole (36) and drive the height measuring component (71) to rotate to detect the height of resin sand in the discharge cylinder (3) through the observation hole (36).
6. The water-cooled sand core preparation equipment according to claim 1, characterized in that: The receiving funnel (2) includes a discharge port (22) that is connected to the discharge cylinder (3) in the middle and a second liquid cooling jacket (23) surrounding the outside of the discharge port (22). The receiving funnel (2) has an inlet (231) and an outlet (232) connected to the second cooling jacket.
7. The water-cooled sand core preparation equipment according to claim 1, characterized in that: The device includes a first frame (6), on which a reciprocating drive assembly (61) is mounted. A second frame (62) is mounted on the reciprocating drive assembly (61), on which a liquid cooling assembly (64) and an air blowing assembly (63) are mounted. The reciprocating drive assembly (61) is configured to drive the air blowing assembly (63) to one side of the core box to blow air into the core box. The liquid cooling assembly (64) is configured to cool the air blowing assembly (63).
8. The water-cooled sand core preparation equipment according to claim 7, characterized in that: The air blowing assembly (63) includes an air blowing plate (631) installed on the second frame (62). The air blowing plate (631) includes an internal air storage chamber (6311) and an air inlet (6312) and an air outlet (6313) communicating with the air storage chamber (6311). The air blowing plate (631) is also equipped with a nozzle (632) communicating with the air outlet (6313).
9. The water-cooled sand core preparation equipment according to claim 8, characterized in that: The liquid cooling assembly (64) includes a liquid cooling plate (641) mounted on an air blowing plate (631). The liquid cooling plate (641) includes an internal liquid cooling channel (6411) and a liquid inlet (6412) and a liquid outlet (6413) communicating with the liquid cooling channel (6411).