Ejection device for die casting and die-casting mold frame

Abstract

The utility model relates to the field of die-casting devices, solves the problem that an existing device is low in cooling efficiency for a casting with a through hole, and provides an ejection device for die-casting, which comprises a telescopic mechanism, an integrated plate and an ejection assembly, the integrated plate is connected with an output shaft of the telescopic mechanism, an inner cavity and a connecting hole are formed in the integrated plate, and the connecting hole communicates with the inner cavity and is used for being connected with a cooling pipe; the ejection assembly comprises an ejection rod, the ejection rod is provided with a shaft hole, one end of the shaft hole is communicated with the inner cavity, the other end of the shaft hole is closed, the ejection rod is further provided with a side hole, and the side hole is communicated with the shaft hole. According to the utility model, the ejector rod and the integrated plate in the ejector assembly are improved, the integrated plate is provided with the inner cavity, and the ejector rod is provided with the shaft hole and the side hole, so that the side hole can output cooling substances, such as cooling gas, through the communication of the inner cavity, the shaft hole and the side hole. The ejector rods are used for supporting the periphery of the casting through hole, so that cooling substances can enter the through hole, and the cooling coverage area is enlarged.

Description

Technical Field

[0001] This utility model relates to the field of die casting equipment, and more specifically, to an ejector device and a die casting mold frame for die casting. Background Technology

[0002] Die casting is a metal casting process that produces geometrically complex metal parts by rapidly injecting molten metal into a mold under high pressure. Cooling and solidifying the molten metal and cooling the mold are crucial during the die casting process. Common cooling methods include natural cooling, water cooling, oil cooling, and air cooling. Existing die casting equipment has relatively low cooling efficiency for castings with through holes. Utility Model Content

[0003] The purpose of this invention is to provide an ejection device for die casting, which solves the problem of low cooling efficiency of existing devices for castings with through holes. The ejection device can not only realize the ejection operation of the formed casting, but also cool the casting.

[0004] Another objective of this invention is to provide a die-casting mold frame so as to enable the lower mold and the ejection device to be used together.

[0005] The embodiments of this utility model are achieved through the following technical solutions:

[0006] An ejection device for die casting includes: a telescopic mechanism, an integrated plate, and an ejection assembly; the integrated plate is connected to the output shaft of the telescopic mechanism, the integrated plate has an inner cavity and a connecting hole, the connecting hole communicates with the inner cavity, and the connecting hole is used to connect to a cooling pipe; the ejection assembly includes: an ejection rod, the ejection rod has a shaft hole, one end of the shaft hole communicates with the inner cavity, the other end of the shaft hole is closed, the ejection rod also has a side hole, the side hole communicates with the shaft hole.

[0007] Preferably, the distance between the end of the side hole near the shaft hole and the integrated plate is less than the distance between the other end of the side hole and the integrated plate.

[0008] Preferably, the ejection assembly further includes: an ejection cylinder and a telescopic rod, wherein the opening width of the end of the ejection cylinder away from the integrated plate is smaller than the inner diameter of the ejection cylinder, and the cylinder cavity of the ejection cylinder communicates with the inner cavity; the telescopic rod is fitted inside the ejection cylinder and connected to the integrated plate; the diameter of the telescopic rod is adapted to the opening width of the ejection cylinder.

[0009] Preferably, the side wall of the telescopic rod is provided with a limiting block, and the orthographic projection of the limiting block toward the upper end of the ejector cylinder falls completely on the inner top wall of the ejector cylinder.

[0010] Preferably, the ejector assembly further includes a protruding support member, wherein the end of the protruding support member away from the integrated plate is lower than the end of the ejector rod away from the integrated plate.

[0011] Preferably, the protruding support includes a support rod and an ejector block, one end of the support rod being connected to the integrated plate; the ejector block being connected to the other end of the support rod, and the side wall of the ejector block having a transverse protrusion, the thickness of which is less than that of the ejector block.

[0012] A die-casting mold frame includes: a die-casting ejection device and a lower mold fixing mechanism; the lower mold fixing mechanism includes: a plurality of support columns, the plurality of support columns surrounding the die-casting ejection device, and the top end of the support columns being used to connect with the lower mold.

[0013] Preferably, the lower mold fixing mechanism further includes: a base plate and an annular plate, the telescopic mechanism being installed on the base plate; the annular plate being connected to the base plate, and the support column being connected to the annular plate.

[0014] Preferably, the die-casting mold frame further includes: an upper mold fixing mechanism, the upper mold fixing mechanism having longitudinal freedom of movement, a liquid riser tank provided inside the upper mold fixing mechanism, the liquid riser tank having a liquid inlet and a liquid outlet, the liquid outlet being used to communicate with the cavity of the upper mold, and the liquid riser tank being provided with a heating pipe.

[0015] Preferably, it includes: a nozzle and a cooling pipe, wherein the outlet of the nozzle is connected to a coolant circulation channel within the lower mold wall; and the cooling pipe is connected to the inlet of the nozzle.

[0016] This utility model has at least the following beneficial effects:

[0017] This invention improves the ejector rod and integrated plate in the ejector assembly. After the integrated plate is provided with an inner cavity and the ejector rod is provided with a shaft hole and a side hole, the connection between the inner cavity, shaft hole, and side hole allows cooling material, such as cooling gas, to be output from the side hole. The ejector rod is used to support the through-hole of the casting, thereby allowing the cooling material to enter the through-hole and increasing the cooling coverage area. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the ejector device used in die casting.

[0020] Figure 2 This is a schematic diagram of the ejector rod.

[0021] Figure 3 This is a schematic diagram of the first state of the telescopic pole;

[0022] Figure 4 This is a schematic diagram of the second state of the telescopic pole;

[0023] Figure 5 This is a schematic diagram showing the interaction between the ejector device used in die casting and the casting.

[0024] Figure 6 This is a schematic diagram of the die-casting mold frame.

[0025] Figure 7 This is a schematic diagram of the upper mold fixing mechanism;

[0026] Figure 8 This is a schematic diagram of the nozzle setup;

[0027] Icons: 1-Telescopic mechanism, 2-Integrated plate, 3-Ejection assembly, 31-Ejection rod, 311-Shaft hole, 312-Side hole, 32-Ejection cylinder, 33-Telescopic rod, 331-Limiting block, 34-Protruding support, 341-Support rod, 342-Ejection block, 3421-Horizontal protrusion, 4-Lower mold fixing mechanism, 41-Support column, 42-Base plate, 43-Annular plate, 5-Upper mold fixing mechanism, 51-Liquid tank, 511-Heating tube, 6-Nozzle, 7-Cold conveying pipe, 8-Upper mold, 9-Lower mold, 10-Casting. Detailed Implementation

[0028] To make the objectives, methods, and advantages of the embodiments of this utility model clearer, the methods in the embodiments of this utility model will be clearly and completely described. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0029] Example 1: As Figure 1 As shown, an ejector device for die casting includes: a telescopic mechanism 1, an integrated plate 2, and an ejector assembly 3; the integrated plate 2 is connected to the output shaft of the telescopic mechanism 1, the integrated plate 2 has an inner cavity and a connecting hole, the connecting hole communicates with the inner cavity, and the connecting hole is used to connect with a cooling pipe; the ejector assembly 3 includes: an ejector rod 31, the ejector rod 31 has a shaft hole 311, one end of the shaft hole 311 communicates with the inner cavity, the other end of the shaft hole 311 is closed, the ejector rod 31 also has a side hole 312, the side hole 312 communicates with the shaft hole 311.

[0030] In the specific implementation process, the applicant hopes to address, for example... Figure 5The present embodiment proposes an improved cooling solution to enhance the cooling effect and speed of castings 10 with through holes. Since the ejector device is used to eject the casting 10 after it has been formed, allowing it to be removed from the lower mold, the ejector rod 31 on the ejector device needs to be in contact with the casting 10. Therefore, the applicant considered using the positional relationship between the ejector rod 31 and the casting 10 to improve the cooling process of the casting 10. For castings 10 with through holes, ejector rods 31 are positioned around the through holes. An inner cavity is formed in the integrated plate 2, and the ejector rods 31 have shaft holes 311 and side holes 312. When the air pump connected to the integrated plate 2 is turned on, cooling gas enters the through hole of the casting 10 along the inner cavity, shaft holes 311, and side holes 312. The cooling gas diffuses along the longitudinal direction of the casting 10, achieving full coverage and reducing temperature differences between different parts of the casting 10 along its longitudinal direction.

[0031] The telescopic mechanism 1 can be a telescopic air cylinder or a telescopic hydraulic cylinder. For example... Figure 5 As shown, three ejector rods 31 are arranged around the through hole, and the outlet of the side hole 312 on each ejector rod 31 faces the through hole.

[0032] Example 2: To allow cooling gas to better enter the through-hole, improvements were made based on Example 1, such as... Figure 2 As shown, in this embodiment, the distance between the end of the side hole 312 near the shaft hole 311 and the integrated plate 2 is less than the distance between the other end of the side hole 312 and the integrated plate 2.

[0033] In the specific implementation process, the side hole 312 can be set as several oblique holes, and the distance between the oblique holes and the casting 10 gradually decreases as the oblique holes extend toward the casting 10.

[0034] Although several side holes 312 can be provided along the circumference of the ejector rod 31, in order to use the cooling gas mainly for cooling the through-hole parts, it can be as follows: Figure 2 As shown, a side hole 312 is provided only on the side near the through hole.

[0035] Example 3: To increase the cooling uniformity of casting 10 in the transverse direction, improvements were made based on Example 1, such as... Figure 1 , Figure 3-5 As shown, in this embodiment, the ejector assembly 3 further includes an ejector cylinder 32 and a telescopic rod 33. The opening width of the end of the ejector cylinder 32 away from the integrated plate 2 is smaller than the inner diameter of the ejector cylinder 32, and the cylinder cavity of the ejector cylinder 32 is connected to the inner cavity. The telescopic rod 33 is fitted inside the ejector cylinder 32 and connected to the integrated plate 2. The diameter of the telescopic rod 33 is adapted to the opening width of the ejector cylinder 32.

[0036] In the specific implementation process, such as Figure 5As shown, in this embodiment, the ejector cylinder 32 contacts the main body of the casting 10, which is the part excluding the area around the through hole and the downward protrusion. The ejector cylinder 32 is positioned to correspond to the flat area of ​​the main body, so that the ejector cylinder 32 and the casting 10 can make good contact and provide stable support. In order to increase the cooling uniformity of the casting 10 in the lateral direction, the ejector cylinder 32 can also release cooling gas in this embodiment. During the die casting process, the positional relationship between the ejector cylinder 32 and the telescopic rod 33 can be found in [reference needed]. Figure 3 As shown, the top of the telescopic rod 33 completely seals the ejector cylinder 32. When the casting 10 requires cooling after molding, the positional relationship between the ejector cylinder 32 and the telescopic rod 33 can be found in [reference needed]. Figure 4 As shown, when the telescopic rod 33 is shortened, the cooling gas in the inner cavity of the integrated plate 2 can be released as follows: Figure 4 The flow, as indicated by the middle arrow, exits from the opening of the ejector cylinder 32. To prevent excessive pressure inside the ejector cylinder 32, further measures can be taken as follows: Figure 4 As shown, a horizontal air outlet is provided on the top wall of the top tube 32.

[0037] The telescopic pole 33 can be an electric telescopic pole 33.

[0038] Example 4: In order to ensure that the top of the telescopic rod 33 is flush with the top of the ejector cylinder 32, an improvement was made based on Example 3. In this example, the side wall of the telescopic rod 33 is provided with a limiting block 331, and the orthographic projection of the limiting block 331 toward the upper end of the ejector cylinder 32 falls completely on the inner top wall of the ejector cylinder 32.

[0039] In the specific implementation process, such as Figure 3 As shown, when the telescopic rod 33 extends, the limiting block 331 can restrict the extension limit position of the telescopic rod 33 to prevent it from affecting the forming of the casting 10 after it extends out of the ejector cylinder 32. When the limiting block 331 abuts against the inner top wall of the ejector cylinder 32, the outer top wall of the telescopic rod 33 is flush with the outer top wall of the ejector cylinder 32.

[0040] Example 5: To increase the demolding stability of casting 10 during ejection, improvements were made based on Examples 1-4, such as... Figure 1 and Figure 5 As shown, in this embodiment, the ejector assembly 3 further includes a protruding support member 34, the end of the protruding support member 34 away from the integrated plate 2 being lower than the end of the ejector rod 31 away from the integrated plate 2.

[0041] In the specific implementation process, such as Figure 5 As shown, when the shape of the casting 10 has a downward protrusion, the casting 10 can be supported by the protruding support 34, increasing the number of support points and improving the support stability.

[0042] Example 6: As Figure 1As shown, in this embodiment, the protruding support 34 includes a support rod 341 and an ejector block 342. One end of the support rod 341 is connected to the integrated plate 2. The ejector block 342 is connected to the other end of the support rod 341. The side wall of the ejector block 342 is provided with a transverse protrusion 3421, and the thickness of the transverse protrusion 3421 is less than that of the ejector block 342.

[0043] In the specific implementation process, it can be as follows: Figure 1 As shown, an ejector block 342 is connected by two support rods 341. The ejector block 342 can fully abut against the end of the convex portion of the casting 10, increasing support stability. The support rods 341 can also be telescopic rods 33 to adjust the height of the ejector block 342 to accommodate different degrees of convexity of the casting 10. The transverse protrusion 3421 can cooperate with the lower mold 9 to achieve ejection limit. Before the ejection operation, there is a certain distance between the transverse protrusion 3421 and the bottom wall of the lower mold 9. During the ejection process, the transverse protrusion 3421 gradually approaches the bottom wall of the lower mold 9 and finally abuts against the bottom wall of the lower mold 9.

[0044] Example 7: As Figure 6 As shown, this embodiment provides a die-casting mold frame, including: a die-casting ejection device and a lower mold fixing mechanism 4; the lower mold fixing mechanism 4 includes: a support column 41, a plurality of support columns 41 are provided, the plurality of support columns 41 surround the die-casting ejection device, and the top end of the support column 41 is used to connect with the lower mold 9.

[0045] In practice, the top of the support column 41 can be threaded to connect with the lower mold 9. When die-casting castings 10 of different shapes, only the lower mold 9 needs to be replaced. The die-casting mold frame does not need to be replaced as a whole.

[0046] Example 8: To better adapt the support column 41 to different lower molds 9, improvements were made based on Example 7, such as... Figure 1 As shown, in this embodiment, the lower mold fixing mechanism 4 further includes: a base plate 42 and an annular plate 43, the telescopic mechanism 1 is installed on the base plate 42; the annular plate 43 is connected to the base plate 42, and the support column 41 is connected to the annular plate 43.

[0047] In specific implementation, the base plate 42 can be the worktable of the die-casting machine, and its position remains fixed. When changing different lower molds 9, the existing support columns 41 may not be suitable for the new lower mold 9. In this case, it is necessary to replace the support columns 41 or change their positions. With the technical solution provided in this embodiment, it is not necessary to disassemble or install the support columns 41 one by one. The support columns 41 can be disassembled and installed as a whole by removing the annular plate 43. The annular plate 43 can be as follows: Figure 1 As shown, it is connected to the base plate 42 by screws or bolts.

[0048] Example 9: To achieve temperature control of the die-casting molten metal, improvements were made based on Example 7, such as... Figure 6-7 As shown, in this embodiment, the die-casting mold frame further includes: an upper mold fixing mechanism 5, the upper mold fixing mechanism 5 having a longitudinal degree of freedom of movement, the upper mold fixing mechanism 5 having a liquid lifting tank 51, the liquid lifting tank 51 having a liquid inlet and a liquid outlet, the liquid outlet being used to communicate with the cavity of the upper mold 8, and the liquid lifting tank 51 having a heating pipe 511.

[0049] In the specific implementation process, such as Figure 6 As shown, the upper end of the upper mold fixing mechanism 5 can be the working platform of the die-casting machine, which can be connected to a compression cylinder or a hydraulic cylinder to realize the longitudinal movement of the upper mold 8. After the upper mold 8 and the lower mold 9 are aligned to form a cavity, the molten metal in the riser tank 51 can be input into the cavity. The upper mold 8 can be connected to the upper mold fixing mechanism 5 through a keyway. After the connection is completed, the liquid inlet of the upper mold 8 is connected to the liquid outlet of the riser tank 51. When it is necessary to replace the upper mold 8, it can be disassembled and assembled through the keyway.

[0050] like Figure 7 As shown, the heating tube 511 can be in direct contact with the molten casting, or it can be installed in the interlayer of the side wall of the riser tank 51 to achieve indirect heat transfer. A temperature sensor can also be installed in the riser tank 51 to achieve temperature control of the molten casting.

[0051] The riser tank 51 is an important component in the die casting process. It is mainly used to store molten metal and transport it to the injection chamber of the die casting machine through the riser pipe. Its specific structure is existing technology and will not be described in detail in this embodiment.

[0052] Example 10: To cool the lower mold 9 and casting 10, improvements were made based on Examples 7-9, such as... Figure 8 As shown, in this embodiment, the die-casting mold frame further includes: a nozzle 6 and a cooling pipe 7. The outlet of the nozzle 6 is used to communicate with the cooling liquid circulation channel in the mold wall of the lower mold 9; the cooling pipe 7 is connected to the inlet of the nozzle 6.

[0053] In practice, since the mold is in direct contact with the molten casting, its temperature is also relatively high. In this embodiment, while the mold is cooled by the nozzle 6, the cooling of the mold 8 also accelerates the heat dissipation of the casting 10. The coolant circulation channel in the lower mold 9 can bypass the ejection hole corresponding to the ejection mechanism. Each nozzle 6 can correspond to an independent coolant circulation channel. After the nozzle 6 sprays coolant into one end of the coolant circulation channel, the coolant flows out from the other end of the coolant circulation channel and then circulates back to the nozzle 6 through the pipeline. During the circulation process, the coolant fully releases the absorbed heat to ensure a good cooling effect.

[0054] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An ejector device for die casting, characterized in that, include: Telescopic mechanism (1); An integrated plate (2) is connected to the output shaft of the telescopic mechanism (1). The integrated plate (2) is provided with an inner cavity and a connecting hole. The connecting hole communicates with the inner cavity and is used to connect with a cooling pipe. Ejection component (3), the ejection component (3) comprising: The ejector rod (31) is provided with a shaft hole (311), one end of which is connected to the inner cavity and the other end of which is closed. The ejector rod (31) is also provided with a side hole (312), which is connected to the shaft hole (311).

2. The ejector device for die casting according to claim 1, characterized in that, The distance between the end of the side hole (312) near the shaft hole (311) and the integrated plate (2) is less than the distance between the other end of the side hole (312) and the integrated plate (2).

3. The ejector device for die casting according to claim 1, characterized in that, The ejection assembly (3) also includes: Ejector cylinder (32), the opening width of the end of the ejector cylinder (32) away from the integrated plate (2) is smaller than the inner diameter of the ejector cylinder (32), and the cylinder cavity of the ejector cylinder (32) is connected to the inner cavity; Telescopic rod (33), which is fitted inside the ejector cylinder (32) and connected to the integrated plate (2); the diameter of the telescopic rod (33) is adapted to the opening width of the ejector cylinder (32).

4. The ejector device for die casting according to claim 3, characterized in that, The telescopic rod (33) has a limiting block (331) on its side wall. The orthographic projection of the limiting block (331) toward the upper end of the ejector cylinder (32) falls completely on the inner top wall of the ejector cylinder (32).

5. The ejector device for die casting according to any one of claims 1-4, characterized in that, The ejection assembly (3) also includes: A raised support member (34) is provided, with one end of the raised support member (34) away from the integrated plate (2) being lower than the end of the ejector rod (31) away from the integrated plate (2).

6. The ejector device for die casting according to claim 5, characterized in that, The protruding support (34) includes: A support rod (341), one end of which is connected to the integrated plate (2); An ejector block (342) is connected to the other end of the support rod (341). The side wall of the ejector block (342) is provided with a transverse protrusion (3421), the thickness of which is less than that of the ejector block (342).

7. A die-casting mold frame, characterized in that, include: The ejector device for die casting as described in any one of claims 1-6; The lower mold fixing mechanism (4) includes: Support column (41), a plurality of support columns (41) are provided, the plurality of support columns (41) surround the die casting ejection device, and the top end of the support column (41) is used to connect with the lower mold (9).

8. The die-casting mold frame according to claim 7, characterized in that, The lower mold fixing mechanism (4) also includes: The base plate (42) is on which the telescopic mechanism (1) is mounted; The annular plate (43) is connected to the base plate (42), and the support column (41) is connected to the annular plate (43).

9. The die-casting mold frame according to claim 7, characterized in that, include: The upper mold fixing mechanism (5) has a longitudinal degree of freedom of movement. The upper mold fixing mechanism (5) is provided with a liquid lifting tank (51). The liquid lifting tank (51) is provided with a liquid inlet and a liquid outlet. The liquid outlet is used to communicate with the cavity of the upper mold (8). The liquid lifting tank (51) is provided with a heating tube (511).

10. The die-casting mold frame according to any one of claims 7-9, characterized in that, include: The nozzle (6) has an outlet for communicating with the coolant circulation channel inside the mold wall of the lower mold (9); A cooling pipe (7) is connected to the inlet of the nozzle (6).

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