An automatic drying production line for lost foam casting white mold

Abstract

The present application relates to an automatic drying production line for lost foam casting white molds, belonging to the technical field of lost foam casting white molds, which includes a drying room, a spraying room, and a ground rail. The drying room is provided with a partition plate, which divides the drying room into a natural drying room and a heat source intervention room. The ground rail runs through the drying room and the spraying room and is arranged in a closed loop curve. A number of transport carts are provided on the ground rails, and the transport carts are provided with drying racks for placing white molds. The natural drying room is provided with an entrance door at one end away from the heat source intervention room, and an exit door at the other end away from the natural drying room. The partition plate is provided with an intermediate door for the transport carts to pass through. The heat source intervention room is provided with a drying mechanism for drying white mold coating, and the spraying room is provided with a spray mechanism for spraying the surface of the white mold. The present application has the effects of improving the degree of automation, reducing labor intensity, and protecting the health of workers.

Description

Technical Field

[0001] The present application relates to the field of lost foam casting white molds, and in particular to an automatic drying production line for lost foam casting white molds. Background Art

[0002] Lost foam casting (also known as full-mold casting, is a new casting method in which foam models of similar size and shape to the casting are bonded together to form a model cluster, coated with refractory coating and dried, and then buried in dry quartz sand for vibration molding. The model is poured under negative pressure to vaporize the model, and liquid metal occupies the position of the model. After solidification and cooling, the casting is formed) is a new casting method. As the "green casting technology" of the 21st century, it is recognized and adopted by more and more manufacturers and enterprises in China because of its green and environmentally friendly casting model, clean and fast production, good product quality, low production cost, and suitability for mass production of castings and the production of special castings.

[0003] However, foam molds are inherently waterproof, requiring a long time to completely dry. Conventional drying in a drying oven often only dries the surface of the foam mold, while the inner layer still contains moisture. This is a major cause of backwash during lost foam casting. In contrast, some companies rarely experience backwash when using foam molds that have been left for a long time for various reasons. This is because the moisture within the foam mold evaporates over time.

[0004] Furthermore, the white mold needs to be dried after painting, typically requiring three coats of paint in a spray booth, with each layer typically drying for over 24 hours. Therefore, the entire foam white mold, from molding to pouring, requires at least four to five days, or even a week. Industrial mass production requires multiple round trips between the spray booth and the drying room to transport the white mold, which is labor-intensive. Furthermore, the paint used on the white mold contains harmful substances like formaldehyde, posing a health hazard to long-term exposure. Summary of the Invention

[0005] In order to improve the above technical problems, the present application provides an automatic drying production line for lost foam casting white molds.

[0006] The present application provides an automatic drying production line for lost foam casting white molds, which adopts the following technical solutions:

[0007] A production line for automatically drying white molds for lost foam casting comprises a drying room, a spraying room and a floor rail, wherein a partition is provided in the drying room, and the partition divides the drying room into a natural drying room and a heat source intervention room, the floor rail passes through the drying room and the spraying room and is arranged in a closed loop curve, a plurality of transport trolleys are provided on the floor rails, and the transport trolleys are provided with drying racks for placing white molds, an inlet door is provided at one end of the natural drying room away from the heat source intervention room, an outlet door is provided at one end of the heat source intervention room away from the natural drying room, an intermediate door for the passage of the transport trolley is provided on the partition plate, the heat source intervention room is provided with a drying mechanism for drying white mold paint, and the spraying room is provided with a spray mechanism for spraying the surface of the white mold.

[0008] By adopting the above technical solution, after the white mold is produced, it is first placed on the drying rack. The transport trolley is started. The transport trolley follows the ground rail from the entrance door into the natural drying room and is left to stand for a period of time and dry naturally. After most of the water inside the white mold evaporates, the transport trolley is started again to transport the drying rack to the heat source intervention room. The drying mechanism dries the white mold, completely evaporating the water inside the white mold, reducing the possibility of backspray from the white mold during subsequent casting. Subsequently, the transport trolley leaves the drying room through the exit door and continues to move along the ground rail into the spraying room. The spraying mechanism performs the first spraying on the white mold, forming the first layer of coating on the surface of the white mold after spraying. Then, the transport trolley carrying the drying rack continues to enter the drying room from the entrance door and moves towards the heat source intervention room. After entering the heat source intervention room through the middle door, the drying mechanism dries the white mold. After the first layer of coating is completely dry, the transport trolley leaves the drying room through the exit door and continues to move along the ground rail into the spraying room. The spraying mechanism performs the second spraying on the white mold to form the second layer of coating. Similarly, after the second coat of the white mold is completely dried using the drying mechanism, the transport cart leaves the heat source intervention chamber and enters the spray chamber for a third coat of coating. This eliminates the need for manual travel between the spray chamber and the drying room, reducing labor intensity and increasing automation. It also eliminates long-term contact with the white mold coating during transport, minimizing the risk of workers inhaling harmful substances like formaldehyde and safeguarding their health.

[0009] Optionally, the drying room is provided with an air inlet and an air exhaust outlet, the air inlet is connected to the natural drying chamber, the air exhaust outlet is connected to the heat source intervention chamber, the partition plate is provided with ventilation holes, the natural drying chamber is connected to a circulating air outlet, and the circulating air outlet and the air exhaust outlet are connected through a circulating air duct.

[0010] By adopting the above technical solution, when drying the white mold and its coating, the moisture in the white mold and its coating is vaporized by the heat of the drying mechanism and evaporates into the space inside the heat source intervention chamber, gradually increasing the humidity within the heat source intervention chamber. Simultaneously, due to the expansion of the gas due to heat, the air pressure within the heat source intervention chamber gradually increases, forming a pressure differential on both sides of the exhaust port. The gas within the heat source intervention chamber enters the circulating air duct from the exhaust port and ultimately enters the natural drying chamber through the circulating air duct. The hot air entering the natural drying chamber increases the temperature within the natural drying chamber, thereby helping to improve the natural drying efficiency of the white mold within the natural drying chamber. This fully utilizes the heat in the exhausted waste hot air, shortening the drying time and improving drying efficiency while also reusing thermal energy and increasing energy utilization.

[0011] Optionally, a condensing mechanism is provided in the natural drying chamber, a dehumidifying exhaust fan is provided at the exhaust port, a humidity sensor is provided in the heat source intervention chamber, and the humidity sensor is electrically connected to the dehumidifying exhaust fan.

[0012] By adopting the above technical solution, the humidity sensor can detect the humidity in the heat source intervention room in real time. When the detected humidity is too high, it sends an electrical signal. The dehumidification exhaust fan starts working after receiving the electrical signal, thereby accelerating the discharge efficiency of the hot and humid gas in the heat source intervention room and realizing the dehumidification function.

[0013] Optionally, a plurality of ventilation holes are evenly arranged on the partition plate, and the ventilation holes are trumpet-shaped, with the large opening end of the ventilation hole close to the natural drying chamber, and the small opening end of the ventilation hole close to the heat source intervention chamber.

[0014] By adopting the above technical solution, the trumpet-shaped ventilation holes facilitate the transmission of gas from the natural drying chamber to the heat source intervention chamber, reduce the possibility of hot air backflow, and have the function of heat preservation.

[0015] Optionally, a moisture-absorbing sponge is embedded in the ventilation hole, a dehumidification cavity and several connecting cavities are provided in the partition plate, the upper end of the connecting cavity is connected with the lower end of the ventilation hole, the lower end of the connecting cavity is connected with the dehumidification cavity, a water baffle is provided on the lower end edge of the hole wall of the ventilation hole, the lower end of the dehumidification cavity is connected with a water collecting tank, and a water-absorbing resin is provided in the water collecting tank.

[0016] By adopting the above technical solution, the hygroscopic sponge can further dehumidify the air passing through the ventilation holes, thereby reducing the source of moisture in the heat-interfering room and, in turn, reducing the humidity in the room. The moisture absorbed by the hygroscopic sponge is gathered at the lower end of the hygroscopic sponge by its own gravity. The water baffle prevents the moisture from overflowing from the hygroscopic sponge. At the same time, the moisture in the hygroscopic sponge can enter the dehumidification cavity through the connecting cavity and ultimately drain into the water collection tank, reducing the possibility of the hygroscopic sponge becoming saturated with water, thereby maintaining good dehumidification efficiency.

[0017] Optionally, the condensation mechanism includes a condensation shell arranged in the natural drying room, a condensation chamber is provided in the condensation shell, a condensation tube is provided in the condensation chamber, a collection box is provided below the condensation shell, a water storage plate is provided at the bottom end of the outer peripheral wall of the condensation shell, the water storage plate is arranged upwardly from the inside to the outside, a water hole is provided on the water storage plate, and the water hole is arranged above the upper end opening of the collection box.

[0018] By adopting the above technical solution, when the gas discharged from the exhaust port enters the natural drying chamber through the circulating air duct, the condenser starts to work. Through the action of the condenser, the surface temperature of the condensation shell is reduced, and the moisture in the gas can condense into water droplets on the surface of the condensation shell. When there are more water droplets on the surface of the condensation shell, the water droplets can gather in the groove formed by the water storage plate and the condensation shell through their own gravity, and finally enter the collection box through the water hole, thereby achieving the purpose of dehumidification.

[0019] Optionally, a water sweeping mechanism is provided on the condensing shell, and the water sweeping mechanism includes a movable frame, and the movable frame is arranged around the outside of the condensing shell. A driving source for driving the movable frame to move up and down is provided on the top of the condensing shell. A guide column is provided on the inner side of the movable frame, and a water sweeping plate is provided at one end of the guide column away from the movable frame. The water sweeping plate is slidably connected to the guide column, and an elastic member is sleeved on the guide column, and one end of the elastic member is fixedly connected to the water sweeping plate, and the other end is fixedly connected to the movable frame.

[0020] By adopting the above technical solution, after a period of use, water marks are easily formed on the surface of the condenser housing because the surface is easily contaminated with dust and the water droplets fall slowly, with poor dust-carrying ability. In this case, the driving source drives the movable frame up and down, which drives the guide column to move, and the up and down movement of the guide column drives the water sweeping plate up and down. The up and down movement of the water sweeping plate can scrape the surface of the condenser housing, which is conducive to cleaning the water marks, thereby keeping the surface of the condenser housing clean.

[0021] Optionally, the condensation shell is coated with a photocatalyst coating, and the natural drying chamber is provided with an ultraviolet electric heating lamp.

[0022] By adopting the above technical solution, the photocatalyst coating catalyzes and oxidizes the formaldehyde in the small water droplets condensed on the surface of the condensation shell under the irradiation of the ultraviolet electric heating lamp, thereby removing the formaldehyde and reducing the formaldehyde content in the water in the final collection box, which is conducive to the wastewater utilization of the water in the collection box.

[0023] Optionally, a reflective film is provided on the inner wall of the natural drying chamber.

[0024] By adopting the above technical solution, the reflective film can be set to reflect ultraviolet light, and the ultraviolet light irradiated on the inner wall of the natural drying room is reflected onto the condensation shell, which helps to improve the decomposition efficiency of formaldehyde in water droplets.

[0025] Optionally, it also includes a branch rail, which merges with the ground rail at one point. A finished product storage chamber is provided on one side of the drying room. The intersection of the branch rail and the ground rail is connected to the exit door, and the end of the branch rail away from the ground rail is connected to the finished product storage chamber.

[0026] By adopting the above technical solution, after the third layer of coating is dried by the drying mechanism, the transport trolley leaves the heat source intervention chamber from the exit door and moves along the branch rail, which can transport the white mold to the finished product storage room for storage, reducing manpower transportation and improving the degree of automation of the production line.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. The installation of floor rails and transport trolleys eliminates the need for manual labor. The transport trolleys transport the white molds back and forth between the spraying room and the drying room along the floor rails, which not only reduces the labor intensity of workers and improves the degree of automation, but also avoids long-term contact of manpower with the white mold coating during transportation, thereby reducing the possibility of workers inhaling harmful substances such as formaldehyde and protecting their health.

[0029] 2. The arrangement of the moisture-absorbing sponge, connecting cavity, and dehumidifying cavity further dehumidifies the air passing through the ventilation holes, thereby reducing the source of moisture in the room where heat sources interfere, and thus reducing the humidity in the room where heat sources interfere. The moisture in the wet sponge can enter the dehumidifying cavity through the connecting cavity and eventually be discharged into the water collection tank, reducing the possibility of the moisture-absorbing sponge becoming saturated with water, thereby maintaining good dehumidification efficiency.

[0030] 3. Through the setting of the photocatalyst coating and the ultraviolet electric heating lamp, the photocatalyst coating catalyzes the decomposition of formaldehyde in the small water droplets condensed on the surface of the condensation shell under the irradiation of the ultraviolet electric heating lamp, thereby achieving the effect of removing formaldehyde, reducing the formaldehyde content in the water in the final collection box, and facilitating the utilization of wastewater in the collection box. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0032] Figure 2 It is a cross-sectional view showing the internal structure of the drying room in the embodiment of the present application.

[0033] Figure 3 It is a cross-sectional view showing the exhaust port and the dehumidification exhaust fan in the embodiment of the present application.

[0034] Figure 4 It is a structural diagram of the condensation mechanism in the embodiment of the present application.

[0035] Figure 5 It is a cross-sectional view showing the internal structure of the condensing shell in the embodiment of the present application.

[0036] Figure 6 Schematic diagram of the layer structure of the photocatalyst coating in the embodiment of the present application.

[0037] Figure 7 It is a cross-sectional view showing the internal structure of the water collecting tank in the embodiment of the present application.

[0038] Figure 8 It is a cross-sectional view showing the connection relationship between the connecting cavity and the water hole in the embodiment of the present application.

[0039] Figure 9 It is a cross-sectional view showing the connection relationship between the connecting cavity and the dehumidification cavity in the embodiment of the present application.

[0040] Explanation of reference numerals: 1. drying room; 11. entrance door; 12. exit door; 13. partition plate; 131. middle door; 132. ventilation hole; 1321. moisture-absorbing sponge; 133. dehumidification cavity; 1331. water collecting tank; 1332. water-absorbing resin; 134. connecting cavity; 135. water baffle; 14. natural drying room; 141. air inlet; 142. circulating air outlet; 1421. circulating air duct; 143. ultraviolet electric heating lamp; 144. reflective film; 15. heat source intervention chamber; 151. drying mechanism; 1511. electric heating pipe; 152. Exhaust vent; 1521. Dehumidification exhaust fan; 153. Humidity sensor; 16. Condensation mechanism; 161. Condensation housing; 1611. Photocatalyst coating; 1612. Driving source; 162. Collection box; 163. Condensation chamber; 1631. Condensation tube; 164. Water storage plate; 1641. Water hole; 17. Water sweeping mechanism; 171. Moving frame; 172. Guide column; 173. Water sweeping plate; 174. Elastic part; 2. Spraying room; 21. Spraying mechanism; 3. Finished product storage room; 4. Ground rail; 41. Transport trolley; 42. Drying rack; 5. Support rail. DETAILED DESCRIPTION

[0041] The following is combined with Figure 1-9 , further details of this application are given.

[0042] The present application discloses an automatic drying production line for lost foam casting white molds. Figure 1An automatic drying production line for lost foam casting white molds includes a drying room 1, a spraying room 2, a finished product storage room 3, a ground rail 4 and a branch rail 5. The ground rail 4 runs through the drying room 1 and the spraying room 2 and is arranged in a closed loop curve. A number of transport trolleys 41 are provided on the ground rail 4, and the transport trolleys 41 are equipped with drying racks 42 for hanging the white molds. An entrance door 11 is provided at one end of the drying room 1, and an exit door 12 is provided at the other end. The branch rail 5 and the ground rail 4 converge at one point. The finished product storage room 3 is provided on one side of the drying room 1. The intersection of the branch rail 5 and the ground rail 4 is connected to the exit door 12, and the end of the branch rail 5 away from the ground rail 4 is connected to the finished product storage room 3.

[0043] Reference Figure 2 The drying room 1 is provided with a partition 13, which divides the drying room 1 into a natural drying chamber 14 and a heat source intervention chamber 15. The entrance door 11 is located at the end of the natural drying chamber 14 away from the heat source intervention chamber 15, and the exit door 12 is located at the end of the heat source intervention chamber 15 away from the natural drying chamber 14. The partition 13 is provided with an intermediate door 131 for the transport vehicle 41 to pass through. The heat source intervention chamber 15 is provided with a drying mechanism 151 for drying the white mold paint. The spray chamber 2 is provided with a spray mechanism 21 for spraying the white mold surface. In this embodiment, the spray mechanism 21 is an automatic sprayer.

[0044] After the white mold is produced, it is first placed on the drying rack 42, and the transport trolley 41 is started. The transport trolley 41 follows the ground rail 4 from the entrance door 11 into the natural drying chamber 14. It is left to stand for a period of time and naturally dry, so that most of the moisture inside the white mold evaporates. The transport trolley 41 is then started again to transport the drying rack 42 to the heat source intervention chamber 15. The drying mechanism 151 dries the white mold, completely evaporating the moisture inside the white mold, reducing the possibility of backspray from the white mold during subsequent casting. Subsequently, the transport trolley 41 leaves the drying room 1 through the exit door 12 and continues to move along the ground rail 4 into the spraying room 2. The spraying mechanism 21 sprays the white mold for the first time, forming a first layer of coating on the surface of the white mold after spraying. Then, the transport trolley 41 carrying the drying rack 42 continues to enter the drying room 1 from the entrance door 11 and moves toward the heat source intervention chamber 15. After passing through the middle door 131 and entering the heat source intervention chamber 15, the drying mechanism 151 dries the white mold. After the first layer of coating is completely dry, the transport trolley 41 leaves the drying room 1 from the exit door 12 and continues to move along the ground rail 4 into the spraying room 2. The spraying mechanism 21 sprays the white mold a second time and forms a second layer of coating. Similarly, after the second layer of coating of the white mold is completely dried by the drying mechanism 151, the transport trolley 41 leaves the heat source intervention chamber 15 and enters the spraying room 2 for a third spraying to form a third layer of coating. After waiting for the third layer of coating to be dried by the drying mechanism 151, the transport trolley 41 leaves the heat source intervention chamber 15 from the exit door 12 and moves along the branch rail 5 until the white mold is transported to the finished product storage room 3 for storage.

[0045] Reference Figure 2 The drying mechanism 151 includes an electric heating tube 1511 installed in the heat source intervention chamber 15. The electric heating tube 1511 is evenly arranged on the inner wall of the heat source intervention chamber 15, so that the temperature distribution inside the heat source intervention chamber 15 is more uniform, so that the white mold and the white mold coating on the drying rack 42 are heated evenly, reducing the occurrence of uneven drying of the white mold and its coating, thereby improving the drying efficiency.

[0046] Reference Figure 1 and Figure 2 The drying room 1 is provided with an air inlet 141 and an air exhaust outlet 152. The air inlet 141 is connected to the natural drying chamber 14, and the air exhaust outlet 152 is connected to the heat source intervention chamber 15. The air exhaust outlet 152 is connected to the heat source intervention chamber 15. A ventilation hole 132 is provided on the partition plate 13. The natural drying chamber 14 is connected to the circulating air outlet 142. The circulating air outlet 142 and the air exhaust outlet 152 are connected through a circulating air duct 1421.

[0047] As the drying mechanism 151 dries the white mold and its coating, as the temperature within the heat source intervention chamber 15 gradually rises, the moisture in the white mold and its coating vaporizes due to the heat of the drying mechanism 151 and evaporates into the space within the heat source intervention chamber 15, gradually increasing the humidity within the heat source intervention chamber 15. Simultaneously, due to the expansion of the gas due to heat, the air pressure within the heat source intervention chamber 15 gradually increases, creating a pressure differential on both sides of the exhaust port 152. The gas within the heat source intervention chamber 15 enters the circulation duct 1421 from the exhaust port 152, and ultimately enters the natural drying chamber 14 through the circulation duct 1421. The hot air entering the natural drying chamber 14 increases the temperature within the natural drying chamber 14, thereby helping to improve the natural drying efficiency of the white mold within the natural drying chamber 14 and achieve waste heat recovery. In addition, the gas in the natural drying chamber 14 enters the heat source intervention chamber 15 from the natural drying chamber 14 through the ventilation hole 132, which is equivalent to the gas entering the heat source intervention chamber 15 being preheated by the natural drying chamber 14 in advance, which helps to quickly increase the temperature in the heat source intervention chamber 15 and improve the drying efficiency of the white mold and its coating.

[0048] Reference Figure 3 During the drying process, moisture from the white mold and its coating evaporates into heat source intervention chamber 15, gradually increasing the humidity within heat source intervention chamber 15. To improve the drying efficiency of heat source intervention chamber 15, a dehumidification exhaust fan 1521 is installed at exhaust port 152. A humidity sensor 153 is installed within heat source intervention chamber 15 and is electrically connected to dehumidification exhaust fan 1521. This allows humidity sensor 153 to monitor the humidity within heat source intervention chamber 15 in real time. When the detected humidity is excessive, it sends an electrical signal, which in turn activates dehumidification exhaust fan 1521, accelerating the exhaust efficiency of the hot, humid gas within heat source intervention chamber 15 and achieving dehumidification.

[0049] Reference Figure 2 、 Figure 4 and Figure 5 The natural drying chamber 14 is provided with a condensation mechanism 16, which can dehumidify the gas in the natural drying chamber 14, thereby helping to improve the natural drying efficiency of the white mold. The condensation mechanism 16 includes a condensation shell 161 and a collection box 162 provided in the natural drying chamber 14, and the condensation shell 161 is fixed to the upper end of the collection box 162. A condensation cavity 163 is provided in the condensation shell 161, and a condensation pipe 1631 is provided in the condensation cavity 163. A water storage plate 164 is fixed to the bottom end of the outer peripheral wall of the condensation shell 161. The water storage plate 164 is arranged upwardly and tilted from the inside to the outside. The tilted bottom surface of the water storage plate 164 is fixed to the top of the collection box 162. A water hole 1641 is provided on the water storage plate 164, and the water hole 1641 is provided above the upper end opening of the collection box 162.

[0050] When the gas discharged from the exhaust port 152 enters the natural drying chamber 14 through the circulating air duct 1421, the condenser 1631 starts to work. Through the action of the condenser 1631, the surface temperature of the condensation shell 161 is reduced, and the moisture in the gas can condense into water droplets on the surface of the condensation shell 161. When there are more water droplets on the surface of the condensation shell 161, the water droplets can gather in the groove formed by the water storage plate 164 and the condensation shell 161 through their own gravity, and finally enter the collection box 162 through the water hole 1641.

[0051] Reference Figure 2 As shown in Figure 6, the condensation housing 161 is coated with a photocatalyst coating 1611, and an ultraviolet electric heating lamp 143 is installed on the inner wall of the natural drying chamber 14. In this embodiment, the photocatalyst coating 1611 is a nano-scale titanium dioxide coating. Since the coating of the white mold coating contains harmful substances such as formaldehyde, and formaldehyde easily evaporates into the natural drying chamber 14 and is easily absorbed by water vapor, the photocatalyst coating 1611 catalyzes the oxidation of formaldehyde in the small water droplets condensed on the surface of the condensation housing 161 under the irradiation of the ultraviolet electric heating lamp 143, thereby removing formaldehyde and reducing the formaldehyde content in the water in the final collection box 162, which is beneficial to the wastewater utilization of the water in the collection box 162. The water reservoir plate 164 blocks water droplets from falling directly into the collection box 162 or flowing to the lower end surface of the condenser housing 161. This prevents the water droplets from remaining on the lower end surface of the condenser housing 161, preventing them from being illuminated by the ultraviolet light lamps 143 and hindering the catalytic decomposition of formaldehyde molecules within the water droplets. To prevent the water reservoir plate 164 from blocking ultraviolet light, it is made of a transparent material, such as transparent plastic or glass. Furthermore, the ultraviolet light lamps 143 heat the air within the natural drying chamber 14, raising the temperature within the chamber and improving the drying effect of the white mold.

[0052] Reference Figure 1 A reflective film 144 is attached to the inner wall of the natural drying chamber 14, which can be used to reflect ultraviolet light, reflecting the ultraviolet light irradiated on the inner wall of the natural drying chamber 14 onto the condensation shell 161, which helps to improve the decomposition efficiency of formaldehyde in water droplets.

[0053] Reference Figure 4 and Figure 5 The condenser housing 161 is provided with a water sweeping mechanism 17, which includes a movable frame 171. The movable frame 171 is arranged around the outside of the condenser housing 161. A driving source 1612 for driving the movable frame 171 to move up and down is fixed to the top of the condenser housing 161. A guide column 172 is fixed to the inside of the movable frame 171. A water sweeping plate 173 is provided at one end of the guide column 172 away from the movable frame 171. The water sweeping plate 173 is slidably connected to the guide column 172. An elastic member 174 is sleeved on the outside of the guide column 172. One end of the elastic member 174 is fixedly connected to the water sweeping plate 173, and the other end is fixedly connected to the movable frame 171. In this embodiment, the driving source 1612 is a pneumatic push rod, and the elastic member 174 is a compression spring.

[0054] After a period of use, water marks are likely to form on the surface of the condenser housing 161 because the surface is easily contaminated with dust and the water droplets fall slowly, resulting in poor dust removal. At this time, the driving source 1612 drives the movable frame 171 to move up and down, which in turn drives the guide post 172 to move. The up and down movement of the guide post 172 drives the water sweeping plate 173 to move up and down. The up and down movement of the water sweeping plate 173 can scrape the surface of the condenser housing 161, thereby cleaning the water marks and keeping the surface of the condenser housing 161 clean.

[0055] Reference Figure 7 and Figure 8 There are multiple ventilation holes 132 evenly arranged on the partition plate 13. The ventilation holes 132 are trumpet-shaped. The large opening end of the ventilation hole 132 is close to the natural drying chamber 14, and the small opening end of the ventilation hole 132 is close to the heat source intervention chamber 15. This design can facilitate the transmission and guidance of gas, and facilitate the transmission of gas from the natural drying chamber 14 to the heat source intervention chamber 15, reducing the possibility of hot air backflow, and has the function of heat preservation, thereby further improving the drying efficiency of the heat source intervention chamber 15.

[0056] Reference Figure 7 、 Figure 8 and Figure 9A moisture-absorbing sponge 1321 is embedded in the ventilation holes 132. A dehumidification cavity 133 and several connecting cavities 134 are defined within the partition plate 13. The upper ends of the connecting cavities 134 communicate with the lower ends of the ventilation holes 132, while the lower ends of the connecting cavities 134 communicate with the dehumidification cavity 133. A water retaining plate 135 is secured to the lower edges of the ventilation holes 132. The lower ends of the dehumidification cavity 133 communicate with a water collection tank 1331, which contains a water-absorbing resin 1332. The moisture-absorbing sponge 1321 further dehumidifies the air passing through the ventilation holes 132, thereby reducing the source of moisture within the heat source intervention chamber 15 and, consequently, the humidity within the heat source intervention chamber 15. Water absorbed by the hygroscopic sponge 1321 is gathered at the lower end of the sponge 1321 by gravity. A water baffle 135 prevents the water from escaping. Meanwhile, the water in the sponge 1321 enters the dehumidification cavity 133 through the connecting cavity 134 and ultimately drains into the water collection tank 1331. This reduces the likelihood of the sponge 1321 becoming saturated with water, thereby maintaining good dehumidification efficiency. The water-absorbing resin 1332 provided within the water collection tank 1331 improves its water retention capacity and reduces the likelihood of water evaporation and subsequent backflow.

[0057] The implementation principle of the automatic drying production line for lost foam casting white molds in the embodiment of the present application is as follows: After the white mold is produced, it is first placed on the drying rack 42, and the transport trolley 41 is started. The transport trolley 41 follows the ground rail 4 from the entrance door 11 into the natural drying chamber 14 to stand for a period of time and dry naturally, so that most of the moisture inside the white mold evaporates. Then, the transport trolley 41 is started again to transport the drying rack 42 to the heat source intervention chamber 15. The drying mechanism 151 dries the white mold so that the moisture inside the white mold completely evaporates, reducing the possibility of backspray from the white mold during subsequent pouring. Subsequently, the transport trolley 41 leaves the drying room 1 from the exit door 12 and continues to move along the ground rail 4 into the spraying chamber 2. The spraying mechanism 21 sprays the white mold for the first time, and the first layer of coating is formed on the surface of the white mold after spraying. Then, the transport trolley 41 carrying the drying rack 42 continues to enter the drying room 1 from the entrance door 11 and moves toward the heat source intervention chamber 15. After passing through the middle door 131 and entering the heat source intervention chamber 15, the drying mechanism 151 dries the white mold. After the first layer of coating is completely dry, the transport trolley 41 leaves the drying room 1 from the exit door 12 and continues to move along the ground rail 4 into the spraying room 2. The spraying mechanism 21 sprays the white mold a second time and forms a second layer of coating. Similarly, after the second layer of coating of the white mold is completely dried by the drying mechanism 151, the transport trolley 41 leaves the heat source intervention chamber 15 and enters the spraying room 2 for a third spraying to form a third layer of coating. After waiting for the third layer of coating to be dried by the drying mechanism 151, the transport trolley 41 leaves the heat source intervention chamber 15 from the exit door 12 and moves along the branch rail 5 until the white mold is transported to the finished product storage room 3 for storage.

[0058] In the above process, no human labor is required, and the transport trolley 41 transports the white mold back and forth between the spraying room 2 and the drying room 1 along the ground rail 4, which not only reduces the labor intensity of workers and improves the degree of automation, but also avoids long-term contact of manpower with the white mold coating during transportation, thereby reducing the possibility of workers inhaling harmful substances such as formaldehyde and protecting the workers' health.

[0059] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. An automatic drying production line for lost foam casting white molds, characterized by: The invention comprises a drying room (1), a spraying room (2) and a ground rail (4); a partition plate (13) is provided in the drying room (1); the partition plate (13) divides the drying room (1) into a natural drying room (14) and a heat source intervention room (15); the ground rail (4) runs through the drying room (1) and the spraying room (2) and is arranged in a closed loop curve; a plurality of transport trolleys (41) are provided on the ground rail (4); the transport trolleys (41) are provided with a drying rack (42) for placing a white mold; the An inlet door (11) is provided at one end of the natural drying chamber (14) away from the heat source intervention chamber (15), an outlet door (12) is provided at one end of the heat source intervention chamber (15) away from the natural drying chamber (14), an intermediate door (131) is provided on the partition plate (13) for the transport trolley (41) to pass through, a drying mechanism (151) for drying the white mold paint is provided in the heat source intervention chamber (15), and a spraying mechanism (21) for spraying the white mold surface is provided in the spraying chamber (2); The drying room (1) is provided with an air inlet (141) and an air outlet (152); the air inlet (141) is communicated with the natural drying chamber (14); the air outlet (152) is communicated with the heat source intervention chamber (15); the partition plate (13) is provided with a ventilation hole (132); the natural drying chamber (14) is communicated with a circulating air outlet (142); the circulating air outlet (142) and the air outlet (152) are connected via a circulating air duct (1421); a condensing mechanism (16) is provided in the natural drying chamber (14); a dehumidifying exhaust fan (1521) is provided at the air outlet (152); a humidity sensor (153) is provided in the heat source intervention chamber (15); the humidity sensor (153) is electrically connected to the dehumidifying exhaust fan (1521); A moisture-absorbing sponge (1321) is embedded in the ventilation hole (132), a dehumidification cavity (133) and a plurality of connecting cavities (134) are provided in the partition plate (13), the upper end of the connecting cavity (134) is communicated with the lower end of the ventilation hole (132), the lower end of the connecting cavity (134) is communicated with the dehumidification cavity (133), a water retaining plate (135) is provided on the lower edge of the hole wall of the ventilation hole (132), the lower end of the dehumidification cavity (133) is communicated with a water collecting box (1331), and a water-absorbing resin (1332) is provided in the water collecting box (1331); The condensation mechanism (16) includes a condensation shell (161) arranged in the natural drying chamber (14), a condensation chamber (163) is provided in the condensation shell (161), a condensation pipe (1631) is provided in the condensation chamber (163), a collection box (162) is provided below the condensation shell (161), a water storage plate (164) is provided at the bottom end of the outer peripheral wall of the condensation shell (161), the water storage plate (164) is arranged upwardly and tilted from the inside to the outside, and a water hole (1641) is provided on the water storage plate (164), and the water hole (1641) is provided above the upper end opening of the collection box (162).

2. The automatic drying production line for lost foam casting white mold according to claim 1, characterized in that: A plurality of ventilation holes (132) are evenly arranged on the partition plate (13), and the ventilation holes (132) are trumpet-shaped. The large opening end of the ventilation hole (132) is close to the natural drying chamber (14), and the small opening end of the ventilation hole (132) is close to the heat source intervention chamber (15).

3. The automatic drying production line for lost foam casting white mold according to claim 2, characterized in that: The condensing shell (161) is provided with a water sweeping mechanism (17), and the water sweeping mechanism (17) includes a movable frame (171), and the movable frame (171) is arranged around the outside of the condensing shell (161). The top of the condensing shell (161) is provided with a driving source (1612) for driving the movable frame (171) to move up and down. The inner side of the movable frame (171) is provided with a guide column (172), and the end of the guide column (172) away from the movable frame (171) is provided with a water sweeping plate (173), and the water sweeping plate (173) is slidably connected to the guide column (172). An elastic member (174) is sleeved on the guide column (172), and one end of the elastic member (174) is fixedly connected to the water sweeping plate (173), and the other end is fixedly connected to the movable frame (171).

4. The automatic drying production line for lost foam casting white mold according to claim 3, characterized in that: The condensation shell (161) is coated with a photocatalyst coating (1611), and an ultraviolet electric heating lamp (143) is provided in the natural drying chamber (14).

5. The automatic drying production line for lost foam casting white mold according to claim 4, characterized in that: A reflective film (144) is provided on the inner wall of the natural drying chamber (14).

6. The lost foam casting white mold automatic drying production line according to claim 1, characterized in that: The drying room (1) further comprises a support rail (5), wherein the support rail (5) and the ground rail (4) meet at one point. A finished product storage chamber (3) is provided on one side of the drying room (1). The intersection of the support rail (5) and the ground rail (4) is connected to an exit door (12). The end of the support rail (5) away from the ground rail (4) is connected to the finished product storage chamber (3).

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