Vacuum pouring equipment

Abstract

The invention discloses vacuum pouring equipment, and belongs to the technical field of vacuum pouring, the vacuum pouring equipment comprises a pouring tank, a pouring mechanism is mounted on the inner top wall of the pouring tank, a mold placing mechanism matched with the pouring mechanism is mounted on the inner bottom wall of the pouring tank, the mold placing mechanism is used for placing a mold, and a supporting frame is fixedly connected to the pouring tank; a feeding mechanism is mounted on the supporting frame, the pouring mechanism comprises a first mounting plate, a first telescopic cylinder is fixedly connected to the first mounting plate, a second mounting plate is fixedly connected to the output end of the first telescopic cylinder, and a plurality of heat dissipation hole molds matched with the molds are fixedly connected to the second mounting plate. Compared with the prior art, the vacuum pouring equipment has the advantages that the pouring efficiency can be effectively improved, manual arrangement of a heat dissipation hole mold is avoided, automatic demolding of the heat dissipation hole mold can be achieved, the automation degree of epoxy resin pouring in a dry-type transformer is improved, manual operation is reduced, and the product quality and consistency are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of vacuum casting, and in particular relates to vacuum casting equipment. Background Art

[0002] In recent years, in order to improve the reliability and stability of electronic products, the epoxy resin casting process has gradually been used in dry-type transformers. Vacuum casting technology has become the mainstream process in this field because it can effectively avoid the mixing of bubbles and impurities.

[0003] However, the pouring process of traditional vacuum pouring equipment is complicated. Not only does it require workers to manually assemble the mold, but after the mold is assembled, it is also necessary to select and place appropriate rectangular structural parts according to the product model to form the necessary heat dissipation holes for the dry-type transformer epoxy resin. The more heat dissipation holes there are in the dry-type transformer epoxy resin, the more labor the workers have to do, which leads to a significant reduction in pouring efficiency. In order to maximize the production efficiency of dry-type transformer epoxy resin, the rectangular structural parts used to form heat dissipation holes are generally demolded together with the mold. As the number of pourings increases, the consumption of rectangular structural parts will also increase, which will increase the cost of vacuum pouring dry-type transformer epoxy resin. When demolding the rectangular structural parts, it will also increase the difficulty of manual operation, which can easily cause mold damage and product quality differences.

[0004] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention and should not be regarded as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the invention

[0005] The object of the present invention is to provide a vacuum casting device which can solve the technical problems raised in the above background technology.

[0006] In order to achieve the above object, a technical solution provided by a specific embodiment of the present invention is as follows: A vacuum pouring equipment comprises a pouring tank, a pouring mechanism is installed on the inner top wall of the pouring tank, a mold placement mechanism matching the pouring mechanism is installed on the inner bottom wall of the pouring tank, the mold placement mechanism is used to place the mold, the pouring tank is fixedly connected to a support frame, a feeding mechanism is installed on the support frame, the pouring mechanism comprises a first mounting plate, a first telescopic cylinder is fixedly connected to the first mounting plate, a second mounting plate is fixedly connected to the output end of the first telescopic cylinder, a plurality of heat dissipation hole molds matching the mold are fixedly connected to the second mounting plate, a second telescopic cylinder is fixedly connected to the second mounting plate, a pretreatment mechanism matching the mold is fixedly connected to the output end of the second telescopic cylinder, a second delivery pipe is installed between the feeding mechanism and the pretreatment mechanism, and a discharge nozzle for spraying out the material in the feeding mechanism is installed on the pretreatment mechanism.

[0007] In one or more embodiments of the present invention, the pretreatment mechanism includes a plurality of third mounting plates, a connecting pipe group matching the mold is installed between the plurality of third mounting plates, a first coating structure matching the mold is fixedly connected to the inner and outer walls of the third mounting plates, a liquid supply mechanism matching the first coating structure is installed on one side of the vacuum casting equipment, and the liquid supply mechanism is used to provide a lubricating medium to the first coating structure.

[0008] In one or more embodiments of the present invention, a second through hole matching the heat dissipation hole mold is formed on the third mounting plate, and a second coating structure matching the heat dissipation hole mold is fixedly connected to the inner wall of the second through hole.

[0009] In one or more embodiments of the present invention, a material delivery channel and an air delivery channel are formed in the third mounting plate, and a nozzle for outputting lubricating medium to the first coating structure and the second coating structure is fixedly connected to the side wall of the material delivery channel, and the connecting pipe group includes a protective layer, and an air delivery pipe and a third material delivery pipe are arranged inside the protective layer, and the third material delivery pipe is used to connect adjacent air delivery channels, and the air delivery pipe is used to connect adjacent material delivery channels, and the discharge nozzle is connected to the air delivery channel.

[0010] In one or more embodiments of the present invention, the heat dissipation hole mold includes a plurality of support columns, an elastic connecting plate is installed between adjacent support columns, a rectangular block is installed inside the elastic connecting plate, an air bag is fixedly connected to the outer wall of the rectangular block, and sealing covers are fixedly connected to both ends of the support columns, and the vacuum casting equipment includes an air supply mechanism matching the heat dissipation hole mold.

[0011] In one or more embodiments of the present invention, a threaded rod, an exhaust nozzle and an air inlet nozzle are fixedly connected to one of the covers, and the exhaust nozzle and the air inlet nozzle are both communicated with the airbag, and a first through hole matching the threaded rod is provided on the second mounting plate, and the threaded rod is threadedly connected with a nut through the first through hole, and a first connecting port and a second connecting port matching the air inlet nozzle and the exhaust nozzle are provided on the second mounting plate.

[0012] In one or more embodiments of the present invention, the air supply mechanism includes an air pump, the air outlet end of the air pump is fixedly connected to a first air inlet pipe, the first air inlet pipe is connected to a first connecting port, and an exhaust pipe matching the second connecting port is installed on the second mounting plate.

[0013] In one or more embodiments of the present invention, a second air inlet pipe is fixedly connected to the first air inlet pipe, an air storage bin is fixedly connected to the inner wall of the pouring tank, an end of the second air inlet pipe away from the first air inlet pipe is fixedly connected to the air storage bin, and a plurality of exhaust valves are fixedly connected to the air storage bin.

[0014] In one or more embodiments of the present invention, the mold placement mechanism includes a first placement plate, the first placement plate is provided with a groove matching the mold, a second placement plate is installed on the bottom wall of the groove, a spring is installed between the second placement plate and the bottom wall of the groove, the bottom wall of the first placement plate is also provided with a third through hole matching the spring, and a vibration motor matching the third through hole is fixedly connected to the second placement plate.

[0015] In one or more embodiments of the present invention, the pouring mechanism and the mold placement mechanism are both slidably connected in the pouring tank, and the pouring mechanism and the mold placement mechanism can slide synchronously in the pouring tank.

[0016] Compared with the prior art, the vacuum casting equipment of the present invention can effectively improve the casting efficiency, avoid the manual setting of the heat dissipation hole mold, and can realize the automatic demoulding of the heat dissipation hole mold, thereby improving the automation degree of epoxy resin casting in the dry-type transformer, reducing manual operation, and improving product quality and consistency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 A schematic diagram of the structure of a vacuum casting device in one embodiment of the present invention Figure 1 ; Figure 2 A schematic diagram of the structure of a vacuum casting device in one embodiment of the present invention Figure 2 ; Figure 3 It is a structural schematic diagram of a pouring mechanism in one embodiment of the present invention; Figure 4 for Figure 3 Schematic diagram of the structure at A in the middle; Figure 5 It is a structural schematic diagram of a heat dissipation hole mold in one embodiment of the present invention; Figure 6 A partial cross-sectional view of a second mounting plate in one embodiment of the present invention; Figure 7 A cross-sectional view of a heat dissipation hole mold in one embodiment of the present invention; Figure 8 A partial cross-sectional view of a gas storage bin in one embodiment of the present invention; Fig. 9The structure of the pre-processing mechanism in one embodiment of the present invention is shown in FIG. Figure 1 ; Fig.10 A partial cross-sectional view of a pre-treatment mechanism in one embodiment of the present invention; Fig.11 for Fig.10 Schematic diagram of the structure at B in the middle; Fig.12 This is a structural schematic diagram of a connecting pipe group in one embodiment of the present invention; Fig.13 The structure of the pre-processing mechanism in one embodiment of the present invention is shown in FIG. Figure 2 ; Fig.14 It is a structural schematic diagram of a liquid supply mechanism in one embodiment of the present invention; Fig.15 A partial cross-sectional view of a mold placement mechanism in one embodiment of the present invention; Fig.16 It is a structural schematic diagram of a mold placement mechanism and a mold in one embodiment of the present invention; Fig.17 This is a loading state diagram of a vacuum casting equipment in one embodiment of the present invention.

[0019] Description of main reference numerals: 1. pouring tank; 2. cover; 3. support frame; 4. guardrail; 5. feeding mechanism; 501. first feeding pipe; 6. diverter; 7. second feeding pipe; 8. pouring mechanism; 9. first slide rail; 10. first slider; 11. first mounting plate; 1101. first strip hole; 12. second mounting plate; 1201. second strip hole; 1202. first through hole; 13. heat dissipation hole mold; 1301. support column; 1302. elastic connecting plate; 1303. rectangular block; 1304. air bag; 1305. air inlet nozzle; 1306. exhaust nozzle; 1307. threaded rod; 1308. cover; 14. first telescopic cylinder; 15. nut; 16. pretreatment mechanism; 17. third mounting plate; 1701. feeding channel; 1702. air channel; 18. A coating structure; 19, a second through hole; 20, a second coating structure; 21, a nozzle; 22, a connecting pipe group; 2201, a protective layer; 2202, an air pipe; 2203, a third material pipe; 23, a second telescopic cylinder; 24, a discharge nozzle; 25, an elastic connecting rod; 26, a third coating mechanism; 27, an air supply mechanism; 28, an air pump; 29, a first air inlet pipe; 2901, a second air inlet pipe; 30, an exhaust pipe; 31, an air storage bin; 3101, an exhaust valve; 32, a liquid supply mechanism; 33, a liquid storage tank; 34, a liquid delivery pipe; 35, a mold placement mechanism; 36, a second slide rail; 37, a second slideway; 38, a first placement plate; 3801, a groove; 3802, a third through hole; 39, a spring; 40, a second placement plate; 41, a vibration motor; 42, a mold. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0021] like Figure 1~Figure 2 As shown, a vacuum pouring equipment in one embodiment of the present invention includes a pouring tank 1 and a vacuum system (not shown in the figure), the pouring tank 1 is rotatably connected with a cover body 2, the cover body 2 can completely seal the pouring tank 1, and the vacuum system can evacuate the sealed pouring tank 1 to a vacuum. A support frame 3 is installed on the pouring tank 1, a guardrail 4 is fixedly connected to the support frame 3, and a feeding mechanism 5 for providing materials for pouring the pouring tank 1 is installed on the support frame 3. A first delivery pipe 501 is installed on the feeding mechanism 5. When the materials in the feeding mechanism 5 are used up, the materials can be replenished into the feeding mechanism 5 through the first delivery pipe 501.

[0022] like Figure 1-2 As shown, the lower end of the support frame 3 is fixedly connected with a diverter 6 matching the feeding mechanism 5, and a second feeding pipe 7 is installed on the diverter 6. The end of the second feeding pipe 7 away from the diverter 6 is fixedly connected with a pouring mechanism 8. The pouring mechanism 8 can output materials to the mold 42 in the pouring tank 1, thereby realizing the pouring of epoxy resin of the dry-type transformer.

[0023] like Figure 3 to Figure 9 As shown, the pouring mechanism 8 includes a pretreatment mechanism 16, a heat dissipation hole mechanism and a discharge mechanism. The heat dissipation hole mechanism can be inserted into the mold 42, and the material in the feeding mechanism 5 is output to the mold 42 through the discharge mechanism to complete the pouring. After pouring, there is no material in the heat dissipation hole mechanism. When the heat dissipation hole mechanism is pulled out, a heat dissipation hole is formed. The pretreatment mechanism 16 is to apply a lubricating medium to the mold 42 and the heat dissipation hole mechanism before the pouring mechanism 8 is poured to reduce the demoulding pressure. Reduce the friction and adhesion on the surface of the mold 42 to ensure that the material flows smoothly in the mold, thereby achieving smooth demoulding of the epoxy resin. Secondly, the lubricating medium can form a protective film on the pouring surface of the mold 42, which effectively resists wear and corrosion, thereby extending the service life of the mold and reducing the production cost of the enterprise.

[0024] like Figure 3 to Figure 7 As shown, the pouring mechanism 8 also includes a first slide rail 9, a first slider 10 is slidably connected in the first slide rail 9, a first mounting plate 11 is fixedly connected to one end of the first slider 10 away from the first slide rail 9, a heat dissipation hole mechanism is mounted on the first mounting plate 11, a first telescopic cylinder 14 is fixedly connected to the first mounting plate 11, and a heat dissipation hole mechanism is fixedly connected to the output end of the first telescopic cylinder 14. The heat dissipation hole mechanism can be moved up and down in the vertical direction by the first telescopic cylinder 14, that is, it can be controlled whether the heat dissipation hole mechanism is inserted into the mold 42. That is, after the pouring is completed, after the epoxy resin is formed in the mold 42, the heat dissipation hole mechanism can be pulled up by the first telescopic cylinder 14, so that the heat dissipation hole mechanism and the epoxy resin can be separated, and the heat dissipation hole part can be automatically demoulded, thereby saving the time wasted by manual demoulding and improving the production efficiency of epoxy resin of dry-type transformers.

[0025] like Figure 3 to Figure 7 As shown, the heat dissipation hole mechanism includes a second mounting plate 12, which is detachably connected to the output end of the first telescopic cylinder 14. A plurality of heat dissipation hole molds 13 are detachably mounted on the second mounting plate 12, and the position where the heat dissipation hole molds 13 are inserted into the mold 42 is the position where the heat dissipation hole is located.

[0026] In order to facilitate the heat dissipation hole mechanism to adapt to dry-type transformers of different specifications, such as Figure 3 to Figure 7As shown, a plurality of first through holes 1202 are pre-arranged on the second mounting plate 12, and a plurality of threaded rods 1307 matching the first through holes 1202 are fixedly connected to the heat dissipation hole mold 13. The threaded rods 1307 pass through the first through holes 1202 and are threadedly connected with nuts 15, thereby realizing the detachable installation of the second mounting plate 12 and the heat dissipation hole mold 13, and through the first through holes 1202, heat dissipation hole molds 13 of corresponding quantity and size can be installed according to actual production needs.

[0027] During the pouring process, in order to make it easier to demould the heat dissipation hole mold 13, as shown in FIG. Figure 3 to Figure 7 As shown, the heat dissipation hole mold 13 includes a plurality of support columns 1301, and an elastic connecting plate 1302 is connected between adjacent support columns 1301. In this embodiment, the number of support columns 1301 and the number of elastic connecting plates 1302 are both four, and the four elastic connecting plates 1302 enclose a hollow rectangular body. A rectangular block 1303 is installed in the plurality of elastic connecting plates 1302, and the two ends of the rectangular block 1303 are respectively fixedly connected with a cover 1308 matching the elastic connecting plate 1302, and the cover 1308 seals the two ends of the hollow rectangular body. An airbag 1304 is fixedly connected to the outer wall of the rectangular block 1303, and the airbag 1304 can push the elastic connecting plate 1302 toward the end away from the airbag 1304 after being inflated. When the airbag 1304 is in a non-inflated state, the elastic connecting plate 1302 is in an arc-shaped structure bent toward the airbag 1304.

[0028] Specifically, Figure 7 As shown, during pouring, the airbag 1304 is in an inflated state, and the inflated airbag 1304 pushes the elastic connecting plate 1302 outward, making the elastic connecting plate 1302 in a straight state. After the epoxy resin solidifies, the airbag 1304 discharges the gas, and the elastic connecting plate 1302 is deformed and returns to an arc state. At this time, the contact surface between the heat dissipation hole mold 13 and the epoxy resin is sharply reduced. In the process of pulling the heat dissipation hole mold 13 upward by the first telescopic cylinder 14, the heat dissipation hole mold 13 is easier to separate from the epoxy resin, and it is easier to demold.

[0029] Preferably, one end face of the airbag 1304 is fixedly connected to the rectangular block 1303, and the other end face is fixedly connected to the elastic connecting plate 1302. During the exhaust of the airbag 1304, the airbag 1304 generates a pulling force on the elastic connecting plate 1302, which promotes the deformation of the elastic connecting plate 1302, and promotes the elastic connecting plate 1302 to change from a straight plate to an arc plate, thereby achieving the separation of the elastic connecting plate 1302 from the epoxy resin, and avoiding the situation where the degree of adhesion between the epoxy resin and the elastic connecting plate 1302 is too high and affects the smooth demolding of the heat dissipation hole mold 13.

[0030] like Figure 1 to Figure 7As shown, the vacuum casting equipment includes an air supply mechanism 27 for providing gas to the heat dissipation hole mold 13, and the air supply mechanism 27 includes an air pump 28, and the air pump 28 is located on one side of the casting tank 1. The air outlet of the air pump 28 is fixedly connected to a first air inlet pipe 29, and one end of the first air inlet pipe 29 away from the air pump 28 is fixedly connected to the second mounting plate 12. The second mounting plate 12 is provided with a first connection port (not shown in the figure) and a second connection port (not shown in the figure), and the first air inlet pipe 29 is connected to the first connection port. The end of the heat dissipation hole mold 13 fixedly connected to the threaded rod 1307 is fixedly connected to an air inlet nozzle 1305 and an exhaust nozzle 1306, and the air inlet nozzle 1305 is plugged into the first connection port, and the exhaust nozzle 1306 is plugged into the second connection port, thereby completing the air supply connection between the air supply mechanism 27 and the heat dissipation hole mold 13.

[0031] Among them, Figure 1 to Figure 7 As shown, the second connection port is fixedly connected with an exhaust pipe 30, and one end of the exhaust pipe 30 away from the second connection port is located outside the pouring tank 1. That is, when the airbag 1304 is inflated, the air pump 28 is started, and the gas enters the airbag 1304 through the first air inlet pipe 29, the first connection port, and the air inlet nozzle 1305 in sequence, so that the airbag 1304 expands. When the airbag 1304 is exhausted, the gas in the airbag 1304 passes through the exhaust nozzle 1306, the second connection port, and the exhaust pipe 30 in sequence, and the airbag 1304 shrinks.

[0032] Among them, one end of the exhaust pipe 30 away from the second connection port can be connected to the air inlet end of the air pump 28. Through valve control, when the airbag 1304 needs to be exhausted, the valve is closed, and the air pump 28 is started to exhaust the gas in the airbag 1304. Of course, a valve also needs to be set on the first air inlet pipe 29. When the air pump 28 exhausts the gas in the airbag 1304, the valve of the first air inlet pipe 29 is in a closed state.

[0033] In addition, the positioning installation of the heat dissipation hole mold 13 can also be achieved by setting the air inlet nozzle 1305 and the exhaust nozzle 1306, that is, the air inlet nozzle 1305, the exhaust nozzle 1306 and the threaded rod 1307 form a positioning mechanism. When the exhaust nozzle 1306 and the air inlet nozzle 1305 are respectively plugged into the first connection port and the second connection port, the heat dissipation hole mold 13 will no longer rotate, and the nut 15 can be screwed onto the threaded rod 1307.

[0034] During actual use, the heat dissipation hole mold 13 can also reciprocately inflate and exhaust the airbag 1304 to achieve continuous movement of the elastic connecting plate 1302. During the deformation process, the elastic connecting plate 1302 will drive the epoxy resin to move in the mold 42, increase the flow rate of the epoxy resin in the mold 42, thereby improving the efficiency of epoxy resin pouring, and through the extrusion of the elastic connecting plate 1302, it can further avoid the generation of bubbles in the epoxy resin.

[0035] like Figures 1 to 9 As shown, the second mounting plate 12 is fixedly connected with the second telescopic cylinder 23, one end of the second telescopic cylinder 23 passes through the first mounting plate 11, and is slidably connected to the first mounting plate 11, and one end of the pretreatment mechanism 16 is detachably connected to the output end of the second telescopic cylinder 23. Since the mold 42 is usually installed with a hoisting mechanism, the hoisting mechanism is used to hoist and move the mold 42 after casting. Therefore, the pretreatment mechanism 16 includes a plurality of third mounting plates 17, and a connecting pipe group 22 is fixedly connected between adjacent third mounting plates 17. The plurality of third mounting plates 17 are matched with the mold 42, and the outer wall of the third mounting plate 17 can contact the casting surface of the mold 42. The connecting pipe group 22 is U-shaped, and the second telescopic cylinder 23 can move the third mounting plate 17 downward so that the lower end surface of the third mounting plate 17 contacts the bottom wall of the mold 42. The connecting pipe group 22 can ensure that it is not blocked by the hoisting mechanism, so that the third mounting plate 17 can smoothly enter the mold 42.

[0036] like Figures 1 to 9 As shown, the side wall of the third mounting plate 17 is fixedly connected with a first coating structure 18, and the first coating structure 18 can contact the casting surface of the mold 42. The third mounting plate 17 is also provided with a second through hole 19 matching the heat dissipation hole mold 13, and the inner wall of the second through hole 19 is fixedly connected with a second coating structure 20 in contact with the outer wall of the heat dissipation hole mold 13. That is, the third mounting plate 17 is inserted into the heat dissipation hole mold 13 through the second coating structure 20, and can slide along the direction in which the heat dissipation hole mold 13 is set.

[0037] like Figures 1 to 9 As shown, the vacuum casting equipment includes a liquid supply mechanism 32 for providing lubricating medium to the first coating structure 18 and the second coating structure 20. That is, during the contact between the first coating structure 18 and the second coating structure 20 and the mold 42 and the heat dissipation hole mold 13, the lubricating medium can be applied to the contact surface of the mold 42 and the heat dissipation hole mold 13, so as to facilitate the subsequent demolding of the mold 42 and the heat dissipation hole mold 13.

[0038] Specifically, Figures 1 to 11As shown, the liquid supply mechanism 32 includes a liquid storage tank 33, which is mounted on the support frame 3, and a liquid infusion tube 34 is fixedly connected between the liquid storage tank 33 and the third mounting plate 17. A material delivery channel 1701 is formed in the third mounting plate 17, and the lubricating medium in the liquid storage tank 33 is delivered to the material delivery channel 1701 through the liquid infusion tube 34. A nozzle 21 matching the first coating structure 18 and the second coating structure 20 is fixedly connected to the side wall of the material delivery channel 1701, and the nozzle 21 can evenly spray the lubricating medium in the material delivery channel 1701 onto the first coating structure 18 and the second coating structure 20, and the third mounting plate 17 is driven downward by the second telescopic cylinder 23, so that the first coating structure 18 and the second coating structure 20 are respectively in contact with the mold 42 and the heat dissipation hole mold 13, thereby completing the coating action.

[0039] like Figures 1 to 11 As shown, the discharging mechanism is integrally formed on the pretreatment mechanism 16. The discharging mechanism includes a gas delivery channel 1702, and the gas delivery channel 1702 is fixedly connected with a discharging nozzle 24 matching the gas delivery channel 1702 on the third mounting plate 17, and the discharging nozzle 24 is used to spray out the material in the gas delivery channel 1702. The second delivery pipe 7 and the gas delivery channel 1702 are connected, and the material in the feeding mechanism 5 passes through the diverter 6 and the second delivery pipe 7 in sequence, and finally enters the gas delivery channel 1702, and then the material in the gas delivery channel 1702 is sprayed out by the discharging nozzle 24.

[0040] like Figures 1 to 11 As shown, since the number of the second feed pipes 7 is multiple, that is, the number of the feed channels 1701 and the gas channels 1702 is also multiple, an gas pipe 2202 is installed between adjacent feed channels 1701, and a third feed pipe 2203 is installed between adjacent gas channels 1702, and the lubricating medium and material are transported respectively through the gas pipe 2202 and the third feed pipe 2203.

[0041] like Figures 1 to 12 As shown, in order to protect the gas pipe 2202 and the third material pipe 2203, the connecting pipe group 22 includes a protective layer 2201, which is arranged on the outside of the gas pipe 2202 and the third material pipe 2203, and the protective layer 2201 is made of metal, which can always keep the gas pipe 2202 and the third material pipe 2203 in a U shape.

[0042] like Fig.13As shown, since there are multiple third mounting plates 17, there is a certain gap between the multiple third mounting plates 17 to prevent the lifting mechanism from affecting the third mounting plates 17. In the process of the third mounting plate 17 moving downward through the second telescopic cylinder 23, the gap between adjacent third mounting plates 17 cannot be coated with lubricating medium by the first coating structure 18. In order to solve the above problem, elastic connecting rods 25 are fixedly connected to both ends of the third mounting plate 17. The elastic connecting rod 25 will deform when it contacts the lifting mechanism. The third mounting plate 17 continues to move downward. During the movement, the elastic connecting rod 25 loses contact with the lifting mechanism. The elastic connecting rod 25 restores its shape and can fill the gap between the two third mounting plates 17. The third coating mechanism 26 is fixedly connected to the elastic connecting rod 25. The third coating mechanism 26 can contact the casting surface of the mold 42, and the lubricating medium on the first coating structure 18 can be transferred to the third coating mechanism 26, and then the third coating mechanism 26 coats the lubricating medium on the casting surface of the mold 42.

[0043] like Figure 4 As shown, the first mounting plate 11 is provided with a first strip hole 1101 matching the second coating structure 20, and the second mounting plate 12 is provided with a second strip hole 1201 matching the second coating structure 20. In the initial state, the third mounting plate 17 is attached to the second mounting plate 12, and the second coating structure 20 passes through the second strip hole 1201 and the first strip hole 1101 in sequence. By providing the first strip hole 1101 and the first through hole 1202, the influence of the second coating structure 20 on the casting can be avoided.

[0044] Of course, the second coating structure 20 may also be a soft pipe, and a receiving structure matching the second coating structure 20 may be provided on the second mounting plate 12 to prevent the second coating structure 20 from affecting the pouring during the pouring process.

[0045] In actual use, the second telescopic cylinder 23 drives the third mounting plate 17 to move downward, and at the same time, the liquid supply mechanism 32 provides lubricating medium to the first coating structure 18 and the second coating structure 20. When the lower end surface of the third mounting plate 17 contacts the inner bottom wall of the mold 42, the coating of the lubricating medium is completed. When the second telescopic cylinder 23 drives the third mounting plate 17 to move in the opposite direction, the discharge nozzle 24 sprays the casting material, which greatly saves the time of material spraying and is conducive to improving the preparation efficiency of epoxy resin for dry-type transformers. In addition, since the pouring and solidification of epoxy resin requires a certain temperature, the injection of materials can be achieved when the lubricating medium is just applied, which can avoid the loss of the auxiliary demoulding function of the lubricating medium after drying due to the high temperature environment as much as possible.

[0046] Preferably, the discharge nozzle 24 is embedded in the third mounting plate 17, and the bottom wall of the third mounting plate 17 is also fixedly connected with the first coating structure 18. When the first coating structure 18 of the bottom wall of the third mounting plate 17 contacts the inner bottom wall of the mold 42, the coating of the lubricating medium can also be achieved.

[0047] like Figure 1 , Fig.15 As shown, the bottom wall of the pouring tank 1 is fixedly connected with a mold placement mechanism 35, and the mold 42 is placed on the mold placement mechanism 35. Specifically, the mold placement mechanism 35 includes a second slide rail 36, and the second slide rail 36 is fixedly connected to the inner bottom of the pouring tank 1. A second slideway 37 is slidably connected in the second slide rail 36, and a first placement plate 38 is fixedly connected to the second slideway 37. A groove 3801 matching the mold 42 is provided on the first placement plate 38, and a second placement plate 40 is slidably connected in the groove 3801 in the vertical direction. A spring 39 is fixedly connected between the second placement plate 40 and the bottom wall of the groove 3801. A third through hole 3802 is also fixedly connected to the first placement plate 38, and a vibration motor 41 matching the third through hole 3802 is fixedly connected to the second placement plate 40.

[0048] Furthermore, when the vibration motor 41 is started, it can cause the second placement plate 40 to vibrate in the groove 3801. Since the mold 42 is placed on the second placement plate 40, the mold 42 will also vibrate with the vibration of the second placement plate 40. The material is injected into the mold 42. The high-speed vibration generated by the vibration motor 41 can further eliminate the bubbles in the material in the mold 42, thereby preventing the bubbles from affecting the casting quality of the epoxy resin of the dry-type transformer.

[0049] In actual use, due to the presence of the vibration motor 41, during the process of the pretreatment mechanism 16 cooperating with the discharging mechanism to discharge the material, the second telescopic cylinder 23 moves upward a part, and the discharging mechanism discharges the material. Then the discharging can be stopped, and the material in the mold 42 is vibrated and compacted by the vibration motor 41 before discharging again. The one-time injection of epoxy resin is changed to multiple injections, and the material is vibrated and compacted during each injection, so as to eliminate bubbles in the material and avoid the situation where bubbles affect the product quality.

[0050] Since the pouring mechanism 8 and the mold placement mechanism 35 are both slidably connected to the inside of the pouring tank 1, as shown in FIG. Fig.17 As shown, when placing the mold 42, the pouring mechanism 8 and the mold placement mechanism 35 are both located outside the pouring tank 1, waiting for the placement of the mold 42. After the mold 42 is placed, the pouring mechanism 8 is directly started, and the mold 42 on the mold placement mechanism 35 is pre-processed. After entering the pouring tank 1, when the pouring tank 1 is pumped to a vibrating state, pouring is directly performed, thereby improving the pouring efficiency and the production speed of the product.

[0051] Since the pouring tank 1 is in a vacuum state during the pouring process, when the cover 2 needs to be opened, the vacuum state of the pouring tank 1 needs to be broken. In order to avoid the situation where too much cold air suddenly enters and affects the product quality, such as Figures 1 to 8 As shown, the first air inlet pipe 29 is fixedly connected to the second air inlet pipe 2901, and the end of the second air inlet pipe 2901 away from the first air inlet pipe 29 is fixedly connected to the gas storage bin 31, and the gas storage bin 31 is installed on the inner wall of the pouring tank 1. The gas storage bin 31 is used to store gas for breaking the vacuum state in the pouring tank 1, and a plurality of exhaust valves 3101 are fixedly connected to the gas storage bin 31. After the exhaust valves 3101 discharge the gas, the vacuum state in the pouring tank 1 can be broken, so as to prevent the pump from entering too much cold air and affecting the product in the pouring tank 1.

[0052] When using, Figure 1-2 As shown, the cover 2 is first opened, and then the pouring mechanism 8 and the mold placement mechanism 35 are started, so that the pouring mechanism 8 and the mold placement mechanism 35 are moved to the outside of the pouring tank 1. After the mold 42 is placed on the second placement plate 40, the pouring mechanism 8 and the mold placement mechanism 35 return to the pouring tank 1. In this process, the second telescopic cylinder 23 is started, forcing the third mounting plate 17 to move downward, so that the first coating structure 18, the third coating mechanism 26 and the second coating structure 20 respectively apply lubricating medium to the pouring surface of the mold 42 and the surface of the heat dissipation hole mold 13. After the pouring mechanism 8 and the mold placement mechanism 35 are completely entered into the pouring tank 1, the cover 2 is closed, and then the pouring tank 1 is evacuated to a vacuum state. When the pouring tank 1 is in a vacuum state, the material is discharged through the discharging mechanism, and the vibration motor 41 vibrates at the same time to complete the pouring of the mold 42.

[0053] After the material poured in the mold 42 solidifies, when it is necessary to take out the heat dissipation hole mold 13, the gas in the airbag 1304 is discharged through the exhaust pipe 30. After the gas in the airbag 1304 is discharged, the elastic connecting plate 1302 is deformed, and most of the elastic connecting plate 1302 loses contact with the material. The contact area between the heat dissipation hole mold 13 and the material is greatly reduced, thereby reducing the friction between the heat dissipation hole mold 13 and the material. The second mounting plate 12 is pulled upward by the first telescopic cylinder 14 to remove the heat dissipation hole mold 13 from the solidified material, thereby achieving demolding of the heat dissipation hole.

[0054] The present invention can effectively improve the casting efficiency, avoid manually setting the heat dissipation hole mold 13, and can realize the automatic demoulding of the heat dissipation hole mold 13, thereby improving the automation degree of epoxy resin casting in the dry-type transformer, reducing manual operations, and improving product quality and consistency.

[0055] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0056] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A vacuum casting equipment, characterized in that: include: A pouring tank, wherein a pouring mechanism is installed on the inner top wall of the pouring tank, and a mold placing mechanism matching the pouring mechanism is installed on the inner bottom wall of the pouring tank, wherein the mold placing mechanism is used to place the mold; The pouring tank is fixedly connected with a support frame, and the support frame is installed with a feeding mechanism; The pouring mechanism comprises a first mounting plate, a first telescopic cylinder is fixedly connected to the first mounting plate, an output end of the first telescopic cylinder is fixedly connected to a second mounting plate, and a plurality of heat dissipation hole molds matching the molds are fixedly connected to the second mounting plate; A second telescopic cylinder is fixedly connected to the second mounting plate, and a pretreatment mechanism matching the mold is fixedly connected to the output end of the second telescopic cylinder. A second material delivery pipe is installed between the feeding mechanism and the pretreatment mechanism, and a discharge nozzle for spraying out the material in the feeding mechanism is installed on the pretreatment mechanism.

2. A vacuum casting equipment according to claim 1, characterized in that: The pretreatment mechanism comprises a plurality of third mounting plates, and a connecting pipe group matching the mold is installed between the plurality of third mounting plates; The inner wall and the outer wall of the third mounting plate are fixedly connected with a first coating structure matching the mold, and a liquid supply mechanism matching the first coating structure is installed on one side of the vacuum casting equipment, and the liquid supply mechanism is used to provide lubricating medium to the first coating structure.

3. A vacuum casting equipment according to claim 2, characterized in that: The third mounting plate is provided with a second through hole matching the heat dissipation hole mold, and the inner wall of the second through hole is fixedly connected with a second coating structure matching the heat dissipation hole mold.

4. A vacuum casting equipment according to claim 2 or 3, characterized in that: A material delivery channel and an air delivery channel are formed in the third mounting plate, and a nozzle for delivering lubricating medium to the first coating structure and the second coating structure is fixedly connected to the side wall of the material delivery channel; The connecting pipe group includes a protective layer, and an air delivery pipe and a third material delivery pipe are arranged inside the protective layer. The third material delivery pipe is used to connect adjacent air delivery channels, and the air delivery pipe is used to connect adjacent material delivery channels; The discharge nozzle is communicated with the gas transmission channel.

5. The vacuum casting equipment according to claim 1, characterized in that: The heat dissipation hole mold includes a plurality of support columns, an elastic connection plate is installed between adjacent support columns, a rectangular block is installed in the elastic connection plate, an air bag is fixedly connected to the outer wall of the rectangular block, and both ends of the support column are fixedly connected to the cover; The vacuum casting equipment comprises an air supply mechanism matched with the heat dissipation hole mold.

6. A vacuum casting equipment according to claim 5, characterized in that: A threaded rod, an exhaust nozzle and an air inlet nozzle are fixedly connected to one of the covers, and the exhaust nozzle and the air inlet nozzle are both in communication with the airbag; The second mounting plate is provided with a first through hole matching the threaded rod, and the threaded rod passes through the first through hole and is threadedly connected with a nut; The second mounting plate is provided with a first connection port and a second connection port matching the air inlet nozzle and the air outlet nozzle.

7. A vacuum casting equipment according to claim 6, characterized in that: The air supply mechanism comprises an air pump, the air outlet end of the air pump is fixedly connected with a first air inlet pipe, the first air inlet pipe is communicated with a first connecting port, and an exhaust pipe matching the second connecting port is mounted on the second mounting plate.

8. A vacuum casting equipment according to claim 7, characterized in that: The first air inlet pipe is fixedly connected to a second air inlet pipe, the inner wall of the pouring tank is fixedly connected to an air storage bin, one end of the second air inlet pipe away from the first air inlet pipe is fixedly connected to the air storage bin, and the air storage bin is fixedly connected to a plurality of exhaust valves.

9. The vacuum casting equipment according to claim 1, characterized in that: The mold placement mechanism comprises a first placement plate, a groove matching the mold is formed on the first placement plate, a second placement plate is installed on the bottom wall of the groove, and a spring is installed between the second placement plate and the bottom wall of the groove; The bottom wall of the first placement plate is also provided with a third through hole matching the spring, and the second placement plate is fixedly connected with a vibration motor matching the third through hole.

10. The vacuum casting equipment according to claim 1, characterized in that: The pouring mechanism and the mold placing mechanism are both slidably connected in the pouring tank, and the pouring mechanism and the mold placing mechanism can slide synchronously in the pouring tank.

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