A mold structure for die casting a deep cavity

Abstract

The utility model relates to mould technical field, and disclose a mould structure for die casting deep cavity stripping, including male die, female die groove, female die frame and die casting part, the one end of female die frame is close to male die and is provided with female die kernel subassembly, the one end away from male die of female die kernel subassembly is provided with the mounting groove, the female die kernel subassembly and mounting groove between are provided with the thimble hole no. 1, the female die kernel subassembly includes female die kernel body and backplate, the female die kernel body four corners are provided with the clamping slot. This mould structure for die casting deep cavity stripping, through the flat thimble of strip shape and penetrate the thimble hole no. 1 and the thimble hole no. 2, when opening the mould, from the hole, contact and push the thin wall of die casting part and separate from female die kernel body, because its strip shape structure, can make the flat thimble contact area big, can disperse the ejection force, avoid to cause the local extrusion deformation of thin wall part, can prevent the deformation of part because of stress concentration, solve the part damage problem caused by traditional thimble.

Description

Technical Field

[0001] This invention relates to the field of mold technology, specifically to a mold structure for demolding deep cavities in die casting. Background Technology

[0002] Alloy products are common household items. Due to their advantages such as high strength, good durability, and strong assemblability, alloy products are widely used in home furnishings, medical equipment, building materials, sports equipment and other fields. In the manufacturing process of alloy products, the molten alloy material is usually stirred evenly at a certain temperature and then injected into a die-casting mold. The alloy material is formed in the cavity of the die-casting mold and is then cooled and solidified to obtain the finished alloy product.

[0003] Chinese Utility Model Patent Publication No. CN214920374U discloses a die-casting mold for manufacturing metal products. The specification of this die-casting mold for manufacturing metal products states that it allows for rapid and complete ejection, effectively preventing pitting, cracking, or ejector pin breakage in the molded product during ejection. This reduces the defect rate and scrap rate of the molded product, extends the service life of the die-casting mold, and improves the economic benefits of the enterprise. However, while this die-casting mold for manufacturing metal products can reduce ejector pin breakage, it lacks a uniform stress distribution structure. During ejection, it is not easy to ensure uniform stress on the product, which can easily lead to deformation of parts during the demolding process, resulting in a low product qualification rate. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a mold structure for demolding deep cavities in die casting. It can effectively solve the problem in the prior art that, although it can reduce the phenomenon of ejector pin breakage, it does not have a uniform stress structure. When ejecting, it is not easy to make the product uniformly stressed, which can easily lead to the deformation of parts during the demolding process, resulting in a low product qualification rate.

[0005] The technical solution adopted in this invention is: a mold structure for deep cavity demolding of die casting, including a male mold, a female mold groove, a female mold frame, die casting parts and an ejector pin assembly. A female mold core assembly is provided at one end of the female mold frame near the male mold, and an installation groove is provided at one end of the female mold core assembly away from the male mold. An ejector pin hole is provided between the female mold core assembly and the installation groove.

[0006] The female mold core assembly includes a female mold core body and a back plate. The female mold core body has slots at its four corners. A guide groove 1 is provided at one end of the female mold core body near the slots. A guide groove 2 is provided at the four corners of the back plate. A pin hole 2 is provided through the back plate from left to right. The guide groove 1 and the guide groove 2 are interconnected.

[0007] The ejector pin assembly includes a fixed plate, a cover plate, and a reset baffle. A flat ejector pin is fixedly installed on one end of the fixed plate near the female mold core assembly. A reset spring is provided between the cover plate and the reset baffle. A positioning bolt is fixedly installed between the fixed plate and the cover plate. A positioning hole and a mounting hole are provided through the fixed plate and the cover plate.

[0008] Preferably, a sprue sleeve is fixedly installed at the end of the female mold frame away from the male mold, and a reserved groove 1 and a reserved groove 2 are provided at the upper edge of the female mold core body. Both the reserved groove 1 and the reserved groove 2 are semi-circular in shape. The reserved groove 1 and the reserved groove 2 fit into the sprue sleeve, and a groove is provided at the upper edge of the reset baffle.

[0009] Through the above technical solution, and through the design of the sprue sleeve, when the mold is closed, the molten material enters the casting groove through the sprue sleeve and the reserved groove to form the mold. When the mold is opened, the groove ensures that the reset baffle does not collide with the sprue sleeve when it moves with the ejection system. In addition, the semi-circular reserved groove one and reserved groove two of the female mold core body fit together, which can guide the molten material to flow smoothly into the casting groove, avoiding uneven filling of the molten material caused by the deep cavity structure.

[0010] Preferably, an exhaust block is fixedly installed at the connection between the male mold and the female mold frame. Two identical exhaust blocks are provided, and the two exhaust blocks are symmetrically distributed about the center line of the male mold and the female mold frame.

[0011] With the above technical solution, when the molten material is injected, the gas inside the cavity is discharged through the gap of the venting block, avoiding gas stagnation and forming defects such as bubbles and material shortage. By using two symmetrical venting blocks located at the connection between the male mold and the female mold frame, air and volatiles in the cavity can be discharged when the molten material is filled, which can reduce problems such as porosity and shrinkage in die-cast parts and improve the product qualification rate.

[0012] Preferably, the master mold core body has a casting groove one and a casting groove two at one end near the die-casting part, the casting groove one and the casting groove two are connected, and the casting groove one and the casting groove two have the same shape as the die-casting part.

[0013] Through the above technical solution, the casting tank 1 and casting tank 2, which have the same shape as the die-casting part, are interconnected, which can facilitate the molding of deep cavity thin-walled die-casting parts, ensure the shape and size of the die-casting parts, and avoid part deformation caused by unreasonable cavity design.

[0014] Preferably, a reset rod is fixedly installed in the first guide groove and the second guide groove, and the reset rod is slidably connected to the fixed plate.

[0015] The above technical solution involves installing a reset rod in guide groove one and guide groove two. When the mold is closed, the male mold pushes the reset rod, which in turn drives the fixed plate to compress the reset spring, causing the flat ejector pin to retract into the female mold core. When the mold is opened, the spring force of the reset spring pushes the reset rod to reset, causing the flat ejector pin to eject the part. This solves the problem of the female mold lacking an ejection system, achieves automatic demolding, reduces mold jamming caused by manual intervention, and ensures smooth demolding.

[0016] Preferably, a support column is fixedly installed between the cover plate and the reset baffle, and the support column passes through the mounting hole and is slidably connected to the fixing plate.

[0017] Through the above technical solution, during the ejection process, the support column disperses the elastic force of the reset spring and the reaction force of the parts, preventing the fixed plate and cover plate from deforming due to force. In addition, the support column passes through the mounting hole and connects the cover plate, reset baffle and fixed plate, which can enhance the overall rigidity of the ejection system, withstand the reaction force during ejection, improve the structural stability of the ejection system, avoid component damage caused by the large demolding resistance of thin-walled deep cavity parts, and extend the service life of the mold.

[0018] Preferably, the flat ejector pin has a "strip" shaped cross-section, and the flat ejector pin passes through ejector pin hole one and ejector pin hole two and extends to their outer edge.

[0019] The above technical solution uses a long, flat ejector pin that passes through ejector pin hole one and ejector pin hole two. When the mold opens, the pin extends out of the hole, contacts the thin-walled part of the die-casting part, and pushes it away from the mother mold core. Due to its long, flat structure, the flat ejector pin has a large contact area, which can disperse the ejection force and avoid local compression deformation of the thin-walled part. This can prevent the part from deforming due to concentrated force and solve the problem of part damage caused by traditional ejector pins.

[0020] Preferably, there are multiple identical flat ejector pins, ejector pin hole one, and ejector pin hole two, and the multiple flat ejector pins, ejector pin hole one, and ejector pin hole two are distributed at equal intervals.

[0021] The above technical solution, through the synchronous ejection of multiple equidistant flat ejector pins, can ensure that the die-cast parts are subjected to uniform force, avoiding deformation or mold jamming caused by excessive local force. When the mold is opened, all the flat ejector pins extend simultaneously under the drive of the return spring, and push the parts evenly from multiple points, which can ensure that the parts are smoothly released from the mother mold in the deep cavity, reduce the risk of mold jamming, and improve the product qualification rate.

[0022] Preferably, a guide post is fixedly installed at one end of the female mold frame near the male mold, and the guide post is slidably connected to the male mold.

[0023] Through the above technical solution, the guide pillars are designed to be inserted into the corresponding holes of the male mold during mold closing, thus guiding the closing of the female mold frame and the male mold. During the mold closing process, the guide pillars restrict the relative displacement of the female mold frame and the male mold, ensuring accurate alignment between the two and avoiding mold collisions or part forming deviations caused by mold closing misalignment, thus protecting the deep cavity thin wall structure.

[0024] Preferably, the guide pillars are provided in two identical sets, and each set contains two identical guide pillars. The two sets of guide pillars are symmetrically distributed about the center lines of the male mold and the female mold frame.

[0025] The above technical solution enhances the stability of mold closing by using two sets of symmetrical guide pillars, which allows for the horizontal and vertical displacement of the female mold frame and the male mold. The symmetrically distributed guide pillars also form a two-way constraint, making the mold closing process smoother, reducing mold wear, ensuring the forming accuracy of die-cast parts, and improving the stability of mold use.

[0026] Compared with the prior art, the present invention provides a mold structure for demolding deep cavities in die casting, which has the following beneficial effects:

[0027] 1. The mold structure for deep cavity demolding of die casting uses a long strip-shaped flat ejector pin that passes through ejector pin hole one and ejector pin hole two. When the mold is opened, the pin extends out of the hole, contacts the thin wall of the die casting part, and pushes it away from the mother mold core. Due to its long strip-shaped structure, the flat ejector pin has a large contact area, which can disperse the ejection force and avoid local compression deformation of the thin wall part. It can also prevent the part from deforming due to concentrated force and solve the problem of part damage caused by traditional ejector pins.

[0028] 2. The mold structure used for deep cavity demolding in die casting has the following properties: during the ejection process, the support column disperses the elastic force of the reset spring and the reaction force of the parts, preventing the fixed plate and cover plate from deforming due to stress. In addition, the support column passes through the mounting hole and connects the cover plate, reset baffle and fixed plate, which can enhance the overall rigidity of the ejection system, withstand the reaction force during ejection, and improve the structural stability of the ejection system.

[0029] 3. The mold structure used for deep cavity demolding in die casting uses multiple equidistantly distributed flat ejector pins to eject synchronously, which can make the die-cast parts evenly stressed and avoid deformation or jamming caused by excessive local stress. When the mold is opened, all the flat ejector pins extend simultaneously under the drive of the return spring, and push the parts evenly from multiple points. This can ensure that the parts are smoothly released from the mother mold in the deep cavity, reduce the risk of jamming, and improve the product qualification rate. Attached Figure Description

[0030] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0031] Figure 2 This is a schematic diagram showing the disassembled structure of the master mold frame and the die-casting part of the present invention;

[0032] Figure 3 This is a schematic diagram of the disassembled structure of the female mold frame and female mold core assembly of the present invention;

[0033] Figure 4 This is a schematic diagram showing the disassembled structure of the female mold core assembly and the ejector pin assembly of the present invention;

[0034] Figure 5 This is a schematic diagram of the exploded structure of the present invention. Figure 1 ;

[0035] Figure 6 This is a schematic diagram of the exploded structure of the present invention. Figure 2 ;

[0036] Figure 7 This is a schematic diagram of the exploded structure of the present invention. Figure 3 ;

[0037] Figure 8 This is a schematic diagram of the exploded structure of the ejector pin assembly of the present invention. Figure 1 ;

[0038] Figure 9 This is a schematic diagram of the exploded structure of the ejector pin assembly of the present invention. Figure 2 ;

[0039] Figure 10 This is a schematic diagram of the exploded structure of the ejector pin assembly of the present invention. Figure 3 ;

[0040] Figure 11 This is a schematic diagram of the exploded structure of the master mold core assembly of the present invention.

[0041] The components are as follows: 1. Male mold; 2. Female mold frame; 3. Female mold groove; 4. Ejector hole one; 5. Female mold core assembly; 501. Female mold core body; 502. Casting groove one; 503. Casting groove two; 504. Slot; 505. Guide groove one; 506. Reserved groove one; 507. Reserved groove two; 508. Back plate; 509. Guide groove two; 510. Ejector hole two; 6. Guide post; 7. Die-casting part; 8. Mounting groove; 9. Sprue sleeve; 10. Venting block; 11. Ejector assembly; 1101. Fixing plate; 1102. Reset rod; 1103. Flat ejector pin; 1104. Cover plate; 1105. Support post; 1106. Reset spring; 1107. Reset baffle; 1108. Positioning bolt; 1109. Groove; 1110. Positioning hole; 1111. Mounting hole. Detailed Implementation

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] Example 1: As Figure 1-11 As shown, the present invention provides a mold structure for deep cavity demolding of die casting, including male mold 1, female mold groove 3, female mold frame 2, die casting part 7 and ejector pin assembly 11. A female mold core assembly 5 is provided at one end of the female mold frame 2 near the male mold 1, and an installation groove 8 is provided at the other end of the female mold core assembly 5 away from the male mold 1. An ejector pin hole 4 is provided between the female mold core assembly 5 and the installation groove 8.

[0044] The female mold core assembly 5 includes a female mold core body 501 and a back plate 508. The female mold core body 501 has slots 504 at its four corners. The female mold core body 501 has a guide groove 505 at one end near the slots 504. The back plate 508 has guide grooves 509 at its four corners. The back plate 508 has a pin hole 510 running from left to right. The guide grooves 505 and 509 are interconnected.

[0045] The ejector pin assembly 11 includes a fixing plate 1101, a cover plate 1104, and a reset baffle 1107. A flat ejector pin 1103 is fixedly installed on one end of the fixing plate 1101 near the female mold core assembly 5. A reset spring 1106 is provided between the cover plate 1104 and the reset baffle 1107. A positioning bolt 1108 is fixedly installed between the fixing plate 1101 and the cover plate 1104. A positioning hole 1110 and a mounting hole 1111 are provided through the fixing plate 1101 and the cover plate 1104.

[0046] Specifically, a sprue sleeve 9 is fixedly installed at the end of the female mold frame 2 away from the male mold 1. A reserved groove 1 506 and a reserved groove 2 507 are provided on the upper edge of the female mold core body 501. Both reserved groove 1 506 and reserved groove 2 507 are semi-circular in shape. Reserved groove 1 506 and reserved groove 2 507 fit with the sprue sleeve 9. A groove 1109 is provided on the upper edge of the reset baffle 1107. The advantage is that, through the design of the sprue sleeve 9, when the mold is closed, the molten material enters the casting groove through the sprue sleeve 9 and the reserved groove to form the mold. When the mold is opened, the groove 1109 ensures that the reset baffle 1107 does not collide with the sprue sleeve 9 when it moves with the ejection system. In addition, the semi-circular reserved groove 1 506 and reserved groove 2 507 of the female mold core body 501 fit together, which can guide the molten material to flow smoothly into the casting groove and avoid uneven filling of the molten material caused by the deep cavity structure.

[0047] Specifically, an exhaust block 10 is fixedly installed at the connection between the male mold 1 and the female mold frame 2. Two identical exhaust blocks 10 are provided, and the two exhaust blocks 10 are symmetrically distributed about the center line of the male mold 1 and the female mold frame 2. The advantage is that when the molten material is injected, the gas inside the cavity is discharged through the gap of the exhaust block 10, avoiding gas stagnation and forming defects such as bubbles and material shortage. By having two symmetrical exhaust blocks 10 located at the connection between the male mold 1 and the female mold frame 2, air and volatiles in the cavity can be discharged when the molten material is filled, which can reduce problems such as porosity and shrinkage cavities in the die-cast parts 7 and improve the product qualification rate.

[0048] Specifically, the master mold core body 501 has a casting groove 1 502 and a casting groove 2 503 at one end near the die-casting part 7. The casting groove 1 502 and the casting groove 2 503 are connected. The casting groove 1 502 and the casting groove 2 503 have the same shape as the die-casting part 7. The advantage is that by connecting the casting groove 1 502 and the casting groove 2 503 with the same shape as the die-casting part 7, it is convenient to form a deep cavity thin wall die-casting part 7, which can ensure the shape and size of the die-casting part 7 and avoid part deformation caused by unreasonable cavity design.

[0049] Example 2: Figure 2-11 As shown, this is an improvement on the previous embodiment.

[0050] Specifically, a reset rod 1102 is fixedly installed in guide groove 1 505 and guide groove 2 509. The reset rod 1102 is slidably connected to the fixed plate 1101. The advantage is that, by installing the reset rod 1102 in guide groove 1 505 and guide groove 2 509, when the mold is closed, the male mold 1 pushes the reset rod 1102, which drives the fixed plate 1101 to compress the reset spring 1106, causing the flat ejector pin 1103 to retract into the female mold core body 501. When the mold is opened, the spring force of the reset spring 1106 pushes the reset rod 1102 to reset, which drives the flat ejector pin 1103 to eject the part. This can solve the problem of the female mold not having an ejection system, realize automatic demolding, reduce mold jamming caused by manual intervention, and ensure smooth demolding.

[0051] Specifically, a support column 1105 is fixedly installed between the cover plate 1104 and the reset baffle 1107. The support column 1105 passes through the mounting hole 1111 and is slidably connected to the fixed plate 1101. The advantage is that during the ejection process, the support column 1105 disperses the elastic force of the reset spring 1106 and the reaction force of the parts, preventing the fixed plate 1101 and the cover plate 1104 from deforming due to force. In addition, the support column 1105 passes through the mounting hole 1111 and connects the cover plate 1104, the reset baffle 1107 and the fixed plate 1101, which can enhance the overall rigidity of the ejection system, withstand the reaction force during ejection, improve the structural stability of the ejection system, avoid component damage caused by the large demolding resistance of thin-walled deep cavity parts, and extend the service life of the mold.

[0052] Specifically, the flat ejector pin 1103 has a "strip" shaped cross-section. The flat ejector pin 1103 passes through ejector hole 1 4 and ejector hole 2 510 and extends to its outer edge. The advantage is that, through the strip-shaped flat ejector pin 1103 passing through ejector hole 1 4 and ejector hole 2 510, it extends out of the hole when the mold is opened, contacts the thin wall of the die-cast part 7 and pushes it away from the mother mold core body 501. Due to its strip-shaped structure, the flat ejector pin 1103 has a large contact area, which can disperse the ejection force and avoid local compression deformation of the thin wall part. It can prevent the part from deforming due to concentrated force and solve the problem of part damage caused by traditional ejector pins.

[0053] Example 3: Figure 2-11 As shown, this is an improvement on the previous embodiment.

[0054] Specifically, multiple flat ejector pins 1103, ejector pin hole 1 4, and ejector pin hole 2 510 are provided. These multiple flat ejector pins 1103, ejector pin hole 1 4, and ejector pin hole 2 510 are equidistantly distributed. The advantage is that by ejecting multiple equidistantly distributed flat ejector pins 1103 simultaneously, the die-cast part 7 can be subjected to uniform force, avoiding deformation or mold jamming caused by excessive local force. When the mold is opened, all flat ejector pins 1103 extend simultaneously under the drive of the return spring 1106, and push the part evenly from multiple points. This ensures that the part can smoothly detach from the mother mold in the deep cavity, reducing the risk of mold jamming and improving the product qualification rate.

[0055] Specifically, a guide post 6 is fixedly installed at one end of the female mold frame 2 near the male mold 1. The guide post 6 is slidably connected to the male mold 1. The advantage is that, through the design of the guide post 6, it is inserted into the corresponding hole of the male mold 1 when the mold is closed, which plays a guiding role in the mold closing of the female mold frame 2 and the male mold 1. During the mold closing process, the guide post 6 restricts the relative displacement of the female mold frame 2 and the male mold 1, ensuring that the two are accurately aligned, avoiding mold collision or part forming deviation caused by mold closing misalignment, and protecting the deep cavity thin wall structure.

[0056] Specifically, the guide pillars 6 are provided in two identical sets, with two identical guide pillars in each set. The two guide pillars 6 are symmetrically distributed about the center lines of the male mold 1 and the female mold frame 2. The advantage is that the stability of the mold closing guidance is further enhanced by the two sets of symmetrical guide pillars 6, which allows for the displacement of the female mold frame 2 and the male mold 1 in both horizontal and vertical directions. Furthermore, the symmetrically distributed guide pillars 6 form a two-way constraint, making the mold closing process smoother, reducing mold wear, ensuring the forming accuracy of the die-cast parts 7, and improving the stability of the mold in use.

[0057] Working principle: During use, thanks to the design of the sprue sleeve 9, when the mold is closed, the molten material enters the casting groove through the sprue sleeve 9 and the reserved groove to form the mold. When the mold is opened, the groove 1109 ensures that the reset baffle 1107 does not collide with the sprue sleeve 9 when it moves with the ejection system. Furthermore, the semi-circular reserved groove 1 506 and reserved groove 2 507 of the female mold core body 501 fit together, which can guide the molten material to flow smoothly into the casting groove, avoiding uneven filling of the molten material due to the deep cavity structure. During the injection of molten material, the gas inside the cavity is discharged through the gaps of the venting block 10, avoiding gas stagnation and defects such as bubbles and material shortage. The two symmetrical venting blocks 10 are located at the connection between the male mold 1 and the female mold frame 2, which can discharge air and volatiles in the cavity during the filling of molten material, thereby reducing porosity and shrinkage cavities in the die-cast parts 7. This system addresses issues such as the lack of an ejector system in the die-casting part 7, improving product qualification rates. By connecting the casting groove 502 (identical in shape to the die-casting part 7) and the casting groove 503 (identical in shape to the die-casting part 7), it facilitates the molding of deep-cavity, thin-walled die-casting parts 7, ensuring the shape and size of the die-casting part 7 and preventing part deformation due to improper cavity design. A reset rod 1102 is installed within guide grooves 505 and 509. During mold closing, the male mold 1 pushes the reset rod 1102, causing the fixing plate 1101 to compress the reset spring 1106, retracting the flat ejector pin 1103 into the female mold core body 501. During mold opening, the reset spring 1106 pushes the reset rod 1102 back to its original position, causing the flat ejector pin 1103 to eject the part. This solves the problem of the female mold lacking an ejection system, achieving automatic demolding and reducing costs. Minimal manual intervention reduces mold jamming and ensures smooth demolding. During ejection, the support column 1105 disperses the elastic force of the return spring 1106 and the reaction force of the parts, preventing deformation of the fixed plate 1101 and cover plate 1104 due to stress. Furthermore, the support column 1105 penetrates the mounting hole 1111, connecting the cover plate 1104, return baffle 1107, and fixed plate 1101, enhancing the overall rigidity of the ejection system and withstanding the reaction force during ejection. This improves the structural stability of the ejection system, preventing component damage caused by high demolding resistance of thin-walled, deep-cavity parts, and extending mold life. A long, flat ejector pin 1103 penetrates through ejector pin hole 4 and ejector pin hole 510, extending from the holes during mold opening to contact and push the thin-walled part 7 away from the mold core. The body 501, due to its elongated structure, allows for a large contact area for the flat ejector pins 1103, dispersing the ejection force and preventing localized compression deformation of thin-walled parts. This prevents deformation due to concentrated force, solving the problem of part damage caused by traditional ejector pins. The simultaneous ejection of multiple equidistant flat ejector pins 1103 ensures uniform force on the die-cast part 7, preventing deformation or jamming caused by excessive localized force. During mold opening, all flat ejector pins 1103 extend simultaneously under the drive of the return spring 1106, evenly pushing the part from multiple points. This ensures the part smoothly detaches from the female mold in the deep cavity, reducing the risk of jamming and improving product yield. The guide pillars 6, designed to insert into corresponding holes in the male mold 1 during mold closing, guide the closing of the female mold frame 2 and the male mold 1.During mold closing, the guide pillars 6 restrict the relative displacement of the female mold frame 2 and the male mold 1, ensuring precise alignment and preventing mold collisions or part forming deviations caused by misalignment. This protects the deep-cavity, thin-walled structure. Two sets of symmetrical guide pillars 6 further enhance the stability of the mold closing guidance, allowing for horizontal and vertical displacement of the female mold frame 2 and the male mold 1. The symmetrically distributed guide pillars 6 form a bidirectional constraint, making the mold closing process smoother, reducing mold wear, ensuring the forming accuracy of the die-cast parts 7, and improving the stability of the mold in use.

[0058] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A mold structure for demolding deep cavities in die casting, comprising a male mold (1), a female mold groove (3), a female mold frame (2), a die casting part (7), and an ejector pin assembly (11), characterized in that: The female mold frame (2) is provided with a female mold core assembly (5) at one end near the male mold (1), and an installation groove (8) is provided at the end of the female mold core assembly (5) away from the male mold (1). An ejector pin hole (4) is provided between the female mold core assembly (5) and the installation groove (8). The female mold core assembly (5) includes a female mold core body (501) and a back plate (508). The female mold core body (501) has slots (504) at its four corners. The female mold core body (501) has a guide groove (505) at one end near the slots (504). The back plate (508) has guide grooves (509) at its four corners. The back plate (508) has a pin hole (510) running from left to right. The guide grooves (505) and (509) are interconnected. The ejector pin assembly (11) includes a fixing plate (1101), a cover plate (1104), and a reset baffle (1107). A flat ejector pin (1103) is fixedly installed on one end of the fixing plate (1101) near the female mold core assembly (5). A reset spring (1106) is provided between the cover plate (1104) and the reset baffle (1107). A positioning bolt (1108) is fixedly installed between the fixing plate (1101) and the cover plate (1104). A positioning hole (1110) and a mounting hole (1111) are provided through the fixing plate (1101) and the cover plate (1104).

2. The mold structure for deep cavity demolding in die casting according to claim 1, characterized in that: The female mold frame (2) is fixedly installed with a sprue sleeve (9) at one end away from the male mold (1). The upper edge of the female mold core body (501) is provided with a reserved groove 1 (506) and a reserved groove 2 (507). Both the reserved groove 1 (506) and the reserved groove 2 (507) are semi-circular in shape. The reserved groove 1 (506) and the reserved groove 2 (507) fit with the sprue sleeve (9). The upper edge of the reset baffle (1107) is provided with a groove (1109).

3. The mold structure for demolding deep cavities in die casting according to claim 1, characterized in that: A venting block (10) is fixedly installed at the connection between the male mold (1) and the female mold frame (2). There are two identical venting blocks (10), and the two venting blocks (10) are symmetrically distributed about the center line of the male mold (1) and the female mold frame (2).

4. The mold structure for demolding deep cavities in die casting according to claim 1, characterized in that: The master mold core body (501) has a casting groove one (502) and a casting groove two (503) at one end near the die-casting part (7). The casting groove one (502) and the casting groove two (503) are connected to each other. The casting groove one (502) and the casting groove two (503) have the same shape as the die-casting part (7).

5. A mold structure for demolding deep cavities in die casting according to claim 1, characterized in that: A reset rod (1102) is fixedly installed in the first guide groove (505) and the second guide groove (509), and the reset rod (1102) is slidably connected to the fixing plate (1101).

6. The mold structure for deep cavity demolding in die casting according to claim 1, characterized in that: A support column (1105) is fixedly installed between the cover plate (1104) and the reset baffle (1107). The support column (1105) passes through the mounting hole (1111) and is slidably connected to the fixing plate (1101).

7. A mold structure for demolding deep cavities in die casting according to claim 1, characterized in that: The flat pin (1103) has a "strip" shaped cross section. The flat pin (1103) passes through pin hole one (4) and pin hole two (510) and extends to its outer edge.

8. A mold structure for demolding deep cavities in die casting according to claim 1, characterized in that: The flat pin (1103), pin hole one (4) and pin hole two (510) are provided in multiples, and the multiple flat pins (1103), pin hole one (4) and pin hole two (510) are distributed at equal intervals.

9. A mold structure for demolding deep cavities in die casting according to claim 1, characterized in that: The female mold frame (2) is fixedly installed with a guide post (6) at one end near the male mold (1), and the guide post (6) and the male mold (1) are slidably connected.

10. A mold structure for demolding deep cavities in die casting according to claim 9, characterized in that: The guide pillars (6) are provided in two identical sets, and each set of the guide pillars (6) has two identical ones. The two guide pillars (6) are symmetrically distributed about the center lines of the male mold (1) and the female mold frame (2).

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