Release agent spraying structure for fixed mold and middle plate

Abstract

The utility model relates to the technical field of die-casting dies, and discloses a release agent spraying structure of a fixed die and a middle plate, which comprises a fixed die frame and the middle plate capable of moving away from the fixed die frame or jointed with the fixed die frame, a first runner plate facing the middle plate is arranged on the fixed die frame, and a second runner plate is arranged on the middle plate. The first runner plate and the second runner plate are jointed to form a molten aluminum runner; a plurality of first spraying holes facing the second runner plate are formed in the first runner plate, flow dividing blocks located on the left side and the right side of the second runner plate are arranged on the middle plate, and each flow dividing block is provided with a plurality of spraying nozzles facing the first runner plate. The mold release agent is sprayed to the surface of the first runner plate on the fixed mold frame through the spray nozzles on the middle plate, and the mold release agent is also sprayed to the surface of the second runner plate through the first spray holes in the first runner plate, so that a cross spray mode is formed, and even in an extremely narrow space, the mold release agent can be sprayed to the surface of the second runner plate. The first runner plate and the second runner plate can fully spray a release agent to cover the wall face of the molten aluminum runner, and it is guaranteed that a casting is smoothly demoulded.

Description

Technical Field

[0001] The utility model relates to the technical field of die casting moulds, in particular to a release agent spraying structure for a fixed mould and a middle plate. Background Art

[0002] Die-casting molds are often used in the manufacture of automotive parts. A spraying mechanism is usually set in the die-casting mold to spray a mold release agent on the mold cavity to help the casting to be demolded smoothly. Due to the special structure of the casting, the die-casting mold needs to adopt a three-plate mold structure. When the mold is opened, the middle plate and the movable mold first move together in the direction away from the fixed mold frame. When the middle plate moves to the set distance, the middle plate is restricted by the limit mechanism, and then the movable mold continues to move and separates from the middle plate. After the middle plate and the fixed mold frame are separated, the material cake flow channel between the middle plate and the fixed mold frame is broken and automatically falls off due to gravity. Then, the mold release agent is sprayed on the flow channel plate on the fixed mold and the middle plate. In fact, the distance between the middle plate and the fixed mold frame after the mold is opened is only 200mm, and the space is very narrow. It is difficult for a conventional mold release agent spraying mechanism to move between the middle plate and the fixed mold frame to spray the mold release agent on the flow channel plate on the fixed mold and the middle plate. Therefore, it is necessary to develop a mold release agent spraying structure that can target the fixed mold and the middle plate.

[0003] It can be seen that the existing technology still needs to be improved and enhanced. Utility Model Content

[0004] In view of the above-mentioned deficiencies of the prior art, the purpose of the utility model is to provide a release agent spraying structure for a fixed mold and a middle plate, aiming to solve the problem that the release agent cannot be sprayed on the first flow channel plate and the second flow channel plate in a narrow space.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A release agent spraying structure for a fixed mold and a middle plate comprises a fixed mold frame and a middle plate which can be moved away from the fixed mold frame or engaged with the fixed mold frame, the fixed mold frame is provided with a first flow channel plate facing the middle plate, the middle plate is provided with a second flow channel plate, and an aluminum liquid flow channel is formed after the first flow channel plate and the second flow channel plate are engaged; a plurality of first spray holes facing the second flow channel plate are opened on the first flow channel plate, a first liquid infusion channel is provided inside the first flow channel plate to connect all the first spray holes, a diverter block is provided on the middle plate and located on the left and right sides of the second flow channel plate, and the diverter block is provided with a plurality of spray nozzles facing the first flow channel plate.

[0007] As a further improvement of the above technical solution, the output end of each first spray hole is arranged to be outwardly expanded.

[0008] As a further improvement of the above technical solution, the first spray holes are arranged at intervals along a V-shape.

[0009] As a further improvement of the above technical solution, a part of the first spray holes are arranged in two vertical rows at intervals.

[0010] As a further improvement of the above technical solution, the middle plate is provided with a scraper mechanism for scraping off the water inlets attached to the second flow channel plate.

[0011] As a further improvement of the above technical solution, the scraper mechanism includes a cylinder arranged downward on the top of the middle plate and a scraper connected to the output end of the cylinder.

[0012] As a further improvement of the above technical solution, both sides of the scraper protrude outward to form guide edges, and the middle plate is provided with a track that cooperates with the guide edge, and the guide edge and the track jointly guide the scraper to move vertically.

[0013] As a further improvement of the above technical solution, the scraper includes a scraper main board with a shovel head formed at the bottom and a spray plate integrally formed on the scraper main board. A plurality of second spray holes are provided on the bottom surface of the spray plate, and a second infusion channel is provided inside the spray plate to connect all the second spray holes.

[0014] Beneficial effects of the utility model: Compared with the prior art, the release agent spraying structure provided by the utility model is built into the fixed mold and the middle plate, which solves the problem that the external release agent spraying mechanism in the prior art cannot enter between the fixed mold and the middle plate. The release agent is sprayed on the surface of the first flow channel plate on the fixed mold frame through the spray nozzle on the middle plate, and the release agent is sprayed on the surface of the second flow channel plate through the first spray hole on the first flow channel plate, thereby forming a cross-spraying method. Even in an extremely narrow space, the first flow channel plate and the second flow channel plate can fully spray the release agent to cover the aluminum liquid flow channel wall surface, ensuring smooth demolding of the casting. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional diagram of the fixed mold and the middle plate in the mold closing state.

[0016] Figure 2 This is a three-dimensional diagram of the fixed mold and the middle plate mold opening status.

[0017] Figure 3 This is a three-dimensional diagram of the first flow channel plate installed on the fixed mold frame.

[0018] Figure 4 It is a schematic diagram of the structure of the first infusion channel on the first flow channel plate.

[0019] Figure 5 This is a three-dimensional diagram of the second flow channel plate and the scraper mechanism being arranged on the middle plate.

[0020] Figure 6 A three-dimensional diagram of a spatula.

[0021] Figure 7This is a schematic diagram of the structure of the second infusion channel in the scraper.

[0022] Explanation of the main component symbols: 1-fixed mold frame, 11-insert, 12-first liquid inlet hole, 2-middle plate, 21-casting pipe head, 22-second liquid inlet hole, 3-first flow channel plate, 31-first spray hole, 32-first infusion channel, 33-aluminum liquid flow channel, 34-casting mouth, 4-second flow channel plate, 5-diverter block, 51-spray nozzle, 6-scraper mechanism, 61-oil cylinder, 62-scraper, 621-scraper main board, 622-spraying plate, 623-guide edge, 624-second spray hole, 625-second infusion channel, 63-track, 7-limiting mechanism. DETAILED DESCRIPTION

[0023] The utility model provides a release agent spraying structure for a fixed mold and a middle plate. In order to make the purpose, technical solution and effect of the utility model clearer and more specific, the utility model is further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the protection scope of the utility model.

[0024] In the die-casting mold, the role of the release agent is mainly in the following aspects: Promote demolding: The release agent can form a lubricating film on the surface of the mold, reduce the friction and adhesion between the metal and the mold, and make the sprue and the casting easier to detach from the mold. Protect the mold surface: The lubricating film formed by the release agent can prevent the molten metal from wearing, corroding or oxidizing the mold surface, thereby extending the service life of the mold. Improve the quality of castings: The proper use of release agents can reduce the possibility of defects in castings and improve the finish and surface quality of castings. Improve production efficiency: The use of release agents can reduce the demand for demolding force, shorten demolding time, and improve production efficiency. Since the spacing between the middle plate 2 and the fixed die frame 1 is set to be extremely small, it is difficult to move between the middle plate 2 and the fixed die frame 1 to spray the release agent on the runner plate on the fixed die frame 1 and the middle plate 2. Therefore, the utility model provides a release agent spraying structure for the fixed die frame 1 and the middle plate 2.

[0025] See also Figure 1-Figure 5 The release agent spraying structure includes a fixed mold frame 1 and a middle plate 2 that can be moved away from the fixed mold frame 1 or connected to the fixed mold frame 1, the fixed mold frame 1 is provided with a first flow channel plate 3 facing the middle plate 2, the middle plate 2 is provided with a second flow channel plate 4, and the first flow channel plate 3 and the second flow channel plate 4 are connected to form an aluminum liquid flow channel 33; the first flow channel plate 3 is provided with a plurality of first spray holes 31 facing the second flow channel plate 4, and a first infusion channel 32 is provided inside the first flow channel plate 3 to connect all the first spray holes 31, and the middle plate 2 is provided with a diverter block 5 located on the left and right sides of the second flow channel plate 4, and the diverter block 5 is provided with a plurality of spray nozzles 51 facing the first flow channel plate 3.

[0026] In fact, in order to facilitate the provision of release agent to the diverter block 5 and avoid the interference of the pipeline with the opening and closing of the mold, the fixed mold frame 1 is provided with a first liquid inlet hole 12 connected to the first liquid infusion channel 32 of the first flow channel plate 3; similarly, the side wall of the middle plate 2 is provided with a second liquid inlet hole 22 connected to the inlet of the diverter block 5. The release agent is pumped by a spray pump, the output end of the spray pump is connected to the main pipe, and the branch pipes on the main pipe are respectively connected to the joints on the first liquid inlet hole 12 and the second liquid inlet hole 22, so that the spray nozzle 51 and the first spray hole 31 can spray the release agent.

[0027] During casting, the aluminum liquid enters the casting port 34 on the first runner plate 3 and then enters the aluminum liquid runner 33, and then flows into the mold cavity composed of the fixed mold core arranged on the back of the middle plate 2 and the movable mold core on the movable mold. After the casting is cooled and formed, the middle plate 2 and the fixed mold frame 1 are opened. Under the restriction of the limiting mechanism 7, the mold opening spacing between the middle plate 2 and the fixed mold frame 1 is 200mm. The water outlet between the middle plate 2 and the fixed mold frame 1 is pulled off and automatically falls off due to gravity. A part of the release agent enters the first infusion channel 32 in the first runner plate 3, and the release agent is sprayed from the first spray hole 31 to the surface of the second runner plate 4 on the middle plate 2. At the same time, another part of the release agent enters the diversion block 5, and the release agent is sprayed from the spray nozzle 51 to the surface of the first runner plate 3 on the fixed mold frame 1, thereby ensuring that the wall surface of the aluminum liquid runner 33 surrounded by the first runner plate 3 and the second runner plate 4 is lubricated by the release agent, so that the water outlet is demolded smoothly.

[0028] Compared with the prior art, the release agent spraying structure provided by the utility model is built into the fixed die frame 1 and the middle plate 2, which solves the problem in the prior art that the external release agent spraying mechanism cannot enter between the fixed die frame 1 and the middle plate 2. The release agent is sprayed on the surface of the first flow channel plate 3 on the fixed die frame 1 through the spray nozzle 1 on the middle plate 2, and the release agent is sprayed on the surface of the second flow channel plate through the first spray hole 31 on the first flow channel plate 3, thereby forming a cross-spraying method. Even in an extremely narrow space, the first flow channel plate 3 and the second flow channel plate 4 can be fully sprayed with the release agent to cover the wall surface of the aluminum liquid flow channel, ensuring smooth demolding of the cake flow channel.

[0029] In order to prevent the release agent sprayed from the first spray holes 31 from being too concentrated and to enhance the atomization adhesion effect, the output end of each first spray hole 31 is expanded outward to have a truncated cone hole with a diameter gradually increasing outward.

[0030] See Figure 3As shown, the middle plate 2 is provided with two casting pipe heads 21 for guiding the aluminum liquid to be transported to the back of the middle plate 2, and the fixed mold frame 1 is provided with inserts 11 with the same number as the casting pipe heads 21 and matched one by one, and the inserts 11 are provided with feed ports connected to the aluminum liquid flow channel 33, so that the aluminum liquid flows into the casting pipe head 21 through the feed port; the casting port 34 is arranged in the middle of the first flow channel plate 3, and the aluminum liquid flow channel 33 on the first flow channel plate 3 is branched and connected to the feed port of the insert 11.

[0031] Since the part of the aluminum liquid flow channel 33 connected to the casting port 34 is V-shaped, a part of the first spray holes 31 is arranged at intervals along the V-shape, and the mold release agent is evenly sprayed on the V-shaped aluminum liquid flow channel 33. The part of the aluminum liquid flow channel 33 connected to the feed port of the insert 11 is in the shape of a vertical line, so the other part of the first spray holes 31 is also arranged at intervals in two vertical rows. The arrangement of the first spray holes 31 conforms to the setting path of the aluminum liquid flow channel 33, ensuring that the first spray holes 31 reliably spray the aluminum liquid flow channel 33 area on the second flow channel plate 4.

[0032] In this embodiment, 12 spray nozzles 51 are provided on each diverter block 5, and each spray nozzle 51 is tilted toward the first flow channel plate 3, so as to complete the spraying of the release agent in a large range and efficiently.

[0033] In order to ensure that the water inlet at the inlet of the casting pipe head 21 is effectively disconnected, a scraper mechanism 6 for scraping off the water inlet attached to the second flow channel plate 4 is provided on the middle plate 2 to prevent the water inlet from affecting subsequent mold closing and casting work.

[0034] Furthermore, the scraper mechanism 6 includes an oil cylinder 61 disposed downward on the top of the middle plate 2 and a scraper 62 connected to the output end of the oil cylinder 61. The oil cylinder 61 drives the scraper 62 to move downward, which not only reliably cuts off the water inlet at the casting pipe head 21, but also cleans the aluminum chips attached to the second runner plate 4.

[0035] In this embodiment, two scraper mechanisms 6 are provided and are respectively located directly above the two casting tube heads 21. Although the cake runner is broken and falls under the action of its own weight, the breaking point is uncertain, which may cause the water outlet at the casting tube head 21 to be bent, thereby interfering with the removal of the casting from the cavity. Therefore, the water outlet at the casting tube head 21 is scraped off by the scraper 62, so that the water outlet disconnection position is accurate and the cross-section is smooth, ensuring that the casting is smoothly removed from the cavity.

[0036] For further information, see Figure 6 and Figure 7The two sides of the scraper 62 protrude outward to form guide edges 623, and the middle plate 2 is provided with a track 63 that cooperates with the guide edges 623. The guide edges 623 and the track 63 jointly guide the scraper 62 to move vertically. The guiding effect of the guide edges 623 and the track 63 can not only ensure that the piston rod of the oil cylinder 61 moves in the correct direction, but also prevent the piston rod of the oil cylinder 61 from being subjected to shear force, thereby preventing the piston rod from being deformed due to the shear force.

[0037] In fact, see Figure 3 As shown, since the first spray holes 31 are all arranged above the aluminum liquid flow channel 33, some positions of the aluminum liquid flow channel 33 will be far away from the first spray holes 31, so there will be a spray blind area for the first spray holes 31 to the second flow channel plate 4. In order to solve the problem of spray blind area, in this embodiment, the scraper mechanism 6 not only has the function of scraping the water outlet, but also has the function of spraying the spray agent. The scraper 62 includes a scraper main board 621 with a shovel head formed at the bottom and a spray plate 622 integrally formed on the scraper main board 621. A plurality of second spray holes 624 are opened on the bottom surface of the spray plate 622. A second infusion channel 625 is provided inside the spray plate 622 to connect all the second spray holes 624. The second infusion channel 625 of the spray plate 622 is connected to the branch pipe.

[0038] When the scraper 62 moves vertically back and forth, the second spray hole 624 sprays out the release agent. On the one hand, the release agent is sprayed toward the wet shovel head, and the shovel head evenly applies the release agent to the surface of the second runner plate 4 to fill the gap in the release agent spraying and reduce the friction of the scraper 62. On the other hand, the sprayed release agent will adhere to the surface of the second runner plate 4, and the shovel head will push the release agent to disperse it, so as to better lubricate the surface of the second runner plate 4, reduce the friction between the handle runner and the mold, and improve the demolding efficiency.

[0039] In addition, by adding the second spray hole 624, the first spray hole 31 and the second spray hole 624 can be sprayed in coordination, which can increase the spraying speed of the release agent and improve production efficiency on the one hand, and increase the spraying coverage of the release agent on the other hand, ensuring that the second flow channel plate 4 has no spraying dead angle and the gate is smoothly demolded. The increase in the number of spray holes can increase the redundancy of the release agent spraying structure, and even if some of the holes have problems or are blocked, the other holes can still work normally, thereby improving the reliability and stability of the entire structure.

[0040] It should be noted that when processing the first infusion channel 32, multiple punching positions will be formed on the side of the first flow channel plate 3, and only one of the punching positions will be left to deliver the release agent to the first infusion channel 32, and the remaining punching positions will be blocked. Figure 7As shown, in the second infusion channel 625, two punching positions are formed on the side of the spray plate 622, leaving only the punching position on the top of the spray plate 622 for delivering the release agent to the first infusion channel 32, and the remaining punching positions are blocked.

[0041] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0042] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0043] It is understandable that those skilled in the art can make equivalent substitutions or changes based on the technical solution and the utility model concept of the utility model, and all these changes or substitutions should fall within the protection scope of the utility model.

Claims

1. The release agent spraying structure of the fixed mold and the middle plate is characterized by: It includes a fixed mold frame and a middle plate which can be moved away from the fixed mold frame or connected with the fixed mold frame, the fixed mold frame is provided with a first flow channel plate facing the middle plate, the middle plate is provided with a second flow channel plate, and the first flow channel plate and the second flow channel plate are connected to form an aluminum liquid flow channel; the first flow channel plate is provided with a plurality of first spray holes facing the second flow channel plate, the first flow channel plate is provided with a first infusion channel connecting all the first spray holes, the middle plate is provided with a diverter block located on the left and right sides of the second flow channel plate, and the diverter block is provided with a plurality of spray nozzles facing the first flow channel plate.

2. The release agent spraying structure of the fixed mold and the middle plate according to claim 1 is characterized in that: The output end of each first spray hole is arranged to be outwardly expanded.

3. The release agent spraying structure of the fixed mold and the middle plate according to claim 2 is characterized in that: The first spray holes are arranged at intervals along a V-shape.

4. The release agent spraying structure of the fixed mold and the middle plate according to claim 3 is characterized in that: Another part of the first spray holes is arranged in two vertical rows at intervals.

5. The release agent spraying structure of the fixed mold and the middle plate according to claim 1 is characterized in that: The middle plate is provided with a scraper mechanism for scraping off the water inlets attached to the second flow channel plate.

6. The release agent spraying structure for the fixed mold and the middle plate according to claim 5 is characterized in that: The scraper mechanism comprises an oil cylinder arranged downward on the top of the middle plate and a scraper connected to the output end of the oil cylinder.

7. The release agent spraying structure for the fixed mold and the middle plate according to claim 6 is characterized in that: Both sides of the scraper blade protrude outward to form guide edges, and the middle plate is provided with tracks that match the guide edges. The guide edges and the tracks jointly guide the scraper blade to move vertically.

8. The release agent spraying structure for the fixed mold and the middle plate according to claim 6 is characterized in that: The scraper includes a scraper main board with a scraper head formed at the bottom and a spray plate integrally formed on the scraper main board. A plurality of second spray holes are opened on the bottom surface of the spray plate. A second infusion channel is provided inside the spray plate to connect all the second spray holes.

9. The release agent spraying structure for the fixed mold and the middle plate according to any one of claims 5 to 8, characterized in that: The middle plate is provided with two casting pipe heads for guiding the aluminum liquid to be transported to the back of the middle plate, the fixed mold frame is provided with inserts which are the same in number as the casting pipe heads and matched one by one, the inserts are provided with feed ports which are connected with the aluminum liquid flow channel, so that the aluminum liquid flows into the casting pipe head through the feed ports; the scraper mechanism is provided with two and is respectively located directly above the two casting pipe heads.

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