A mold with a mother-child core-pulling structure

Abstract

The present invention discloses a mold with a mother-and-child core-pulling structure, and relates to the technical field of die-casting molds. A mold with a mother-and-child core-pulling structure comprises a mold body and a mother-and-child core-pulling mechanism, wherein the mother-and-child core-pulling mechanism comprises a mother mold group and a child mold group, the mother mold group comprises a child mounting seat, a mother driving assembly and a mother core, the mother core is arranged at the end of the child mounting seat, the mother driving assembly is used to drive the child mounting seat and the mother core to achieve core pulling, the child mold group comprises a child driving member mounted on the child mounting seat, and a child core arranged inside the child mounting seat and the mother core, the child driving member is used to drive the child core to move in a direction different from that of the mother core to perform core pulling. Through the synergistic effect of the mother mold group and the child mold group, core pulling actions in different directions can be completed in one mold opening process, so that straight core holes and oblique core holes with different extension directions can be formed simultaneously without setting multiple sets of core pulling mechanisms or machining, which is conducive to improving production efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of die-casting dies, and in particular to a die with a mother-and-child core-pulling structure. Background Art

[0002] Die-casting technology is an indispensable part of modern manufacturing industry. It has been widely used in the production and manufacturing of parts in the fields of automobiles, electronics, aviation, etc. Among them, the traditional die-casting mold is mainly composed of two main parts: the fixed mold and the movable mold. A cavity for forming the die-casting is usually opened between the fixed mold and the movable mold. If there is a straight core hole or internal structure on the die-casting that is consistent with the direction of demolding, then the core can be designed on the movable mold. Through the cooperation between the core and the movable mold, the core pulling action can be completed at the same time as the mold opening, and then the corresponding straight core hole or internal structure can be formed. If the die-casting has an oblique core hole or internal structure that is inconsistent with the mold opening direction, if the core is directly installed on the movable mold according to the traditional design, the die-casting will not be able to be demolded directly because of interference with the core. Therefore, at this time, a core pulling structure is generally added to realize the molding of the oblique core hole or internal structure of the die-casting. The core pulling structure can pull out the core that hinders the die-casting before the mold opening action of the movable mold to ensure that the die-casting can be demolded smoothly.

[0003] With the complexity and integration of product structures, the structural shape of die-castings is becoming more and more complex. For example, in an existing die-casting 1, a mold surface 11 to be formed is provided on one side of the die-casting 1, and a straight core hole 12 and an oblique core hole 13 with different extension directions are opened on one side of the mold surface 11. Since the general core-pulling structure can only complete the core hole forming in a single direction, when facing such a die-casting with a complex core hole structure, either more groups of core-pulling structures are set on the mold to realize the core-pulling action in different directions, or the die-casting is required to be machined to perform secondary processing on the internal core hole after die-casting. However, the first method mentioned above will not only increase the design difficulty and design cost of the die-casting mold, but also make it difficult to ensure the stability and accuracy of the core-pulling process, which is easy to cause problems such as product deviation and jamming, while the second method will greatly extend the production cycle of the die-casting, resulting in low production efficiency. Therefore, it is of great significance to optimize and integrate the core-pulling structure so that the die-casting mold can complete the core-pulling action in multiple directions in one mold opening process only through a single core-pulling structure. Summary of the invention

[0004] In order to further optimize the core pulling structure in the die-casting mold, so that the die-casting mold can complete core pulling actions in multiple directions in one mold opening process through only a single core pulling structure, thereby improving the production efficiency of die-casting parts, the present application provides a mold with a mother-and-child core pulling structure.

[0005] The present application provides a mold with a mother-child core-pulling structure that adopts the following technical solution:

[0006] A mold with a mother-child core-pulling structure, comprising:

[0007] A mold body, wherein a cavity for forming a die casting is formed inside the mold body;

[0008] The mother-child core pulling mechanism comprises a fixing seat, a mother mold group and a sub-mold group, wherein the fixing seat is arranged on one side of the mold body, the mother mold group is installed on the fixing seat, and the sub-mold group is arranged inside the mother mold group;

[0009] The female mold assembly includes a sub-mounting seat, a female driving assembly and a female core, the sub-mounting seat is slidably connected to the fixed seat, the female driving assembly is mounted on the fixed seat and is used to drive the sub-mounting seat to slide back and forth in the direction of the cavity, and the female core is arranged at one end of the sub-mounting seat facing the cavity;

[0010] The sub-module includes a sub-driving member and a sub-core, the sub-driving member is installed on the sub-mounting seat, the driving end of the sub-driving member is connected to the sub-core, the sub-core is slidably arranged inside the sub-mounting seat and the mother core, the sub-driving member is used to drive the sub-core to slide in a direction different from the movement direction of the sub-mounting seat, and the sub-core can extend from or retract into the mother core by sliding.

[0011] By adopting the above technical solution, since the mother module and the sub-module are respectively provided with independent driving devices, the mother module and the sub-module can respectively complete the core pulling action in different directions. Moreover, the sub-module is arranged inside the mother module, and the sub-module can be retracted into the mother module by sliding, so that the sub-module will not affect the core pulling action of the mother module, and then the straight core holes and the oblique core holes with different extension directions can be formed together in one die-casting process, without setting up multiple sets of core pulling mechanisms or machining, which is conducive to shortening the production cycle and improving the production efficiency of die-casting parts.

[0012] Optionally, the female core comprises a profile piece and a female core piece, the profile piece and the side wall of the cavity are flush with each other, and the extension direction of the female core piece is parallel to the sliding direction of the sub-mounting seat.

[0013] By adopting the above technical solution, the female core can be used to form the mold surface and straight core hole of the die casting, and the core pulling action of the female core can be realized only by driving the sub-mounting seat to slide and retract through the female driving member.

[0014] Optionally, the sub-core comprises a plug-in portion, an extension portion and a sub-core member, the plug-in portion is connected to the sub-driving member, one end of the extension portion is connected to the plug-in portion, and the other end is connected to the sub-core member, and the sub-core member can be extended from or retracted into the female core by sliding;

[0015] The plug-in portion, the extension portion and the sub-core are formed in one piece, the connections between the plug-in portion, the extension portion and the sub-core are smoothly transitioned, and the edges of the plug-in portion and the extension portion are rounded.

[0016] By adopting the above technical solution, the plug-in part, the extension part and the sub-core are integrally formed, which is conducive to improving the integrity of the sub-core. In addition, the smooth transition of the connection between the plug-in part, the extension part and the sub-core, and the rounded corners of the edges of the plug-in part and the extension part can effectively reduce the stress concentration at the edge of the sub-core, which is conducive to improving the service life of the sub-core. At the same time, the rounded edges can provide smaller plug-in resistance, which is conducive to smoother core pulling of the sub-core and helps to reduce the driving load of the sub-driving part.

[0017] Optionally, the cross-sectional area of ​​the extension portion gradually decreases from one end close to the plug-in portion toward one end of the sub-core member.

[0018] By adopting the above technical solution, the extension part forms a prism structure with rounded edges. When the sub-core is pulled out, the contact area between the sub-core and the inside of the mother core will be directly reduced, thereby greatly reducing the sliding friction that needs to be overcome when pulling out the core. This is not only beneficial to reducing the load on the sub-driving component when pulling out the core, but also beneficial to reducing the wear between the sub-core and the mother core, which is beneficial to extending the service life of the sub-driving component and the sub-core.

[0019] Optionally, the sub-module further includes a sub-connecting member, and the sub-connecting member is used to connect the sub-driving member and the sub-core;

[0020] A sub-drive slot is provided on one side of the sub-connecting member, and a sub-drive block which is mutually engaged with the sub-drive slot is provided at the driving end of the sub-connecting member. A sub-core slot is provided on the other side of the sub-connecting member, and the sub-core is connected to the sub-connecting member through the sub-core slot. A fixing countersunk hole is also provided inside the sub-connecting member, and the fixing countersunk hole connects the sub-drive slot and the sub-core slot. A sub-core fixing member is penetrated through the fixing countersunk hole, and the sub-core fixing member penetrates into the fixing countersunk hole from one side of the sub-drive slot and is threadedly connected to the sub-core. The sub-drive block cover is disposed on the outer side of the fixing countersunk hole, and the sub-core fixing member can be buried in the fixing countersunk hole.

[0021] By adopting the above technical solution, the sub-connector can detachably connect the sub-driving member and the sub-core, so as to facilitate the subsequent replacement or disassembly and maintenance of the sub-driving member or the sub-core. In addition, the sub-core fixing member is threadedly fixed to the sub-core by passing through the fixed countersunk hole, and then the sub-driving block of the sub-driving member is clamped on the outside of the fixed countersunk hole, and the sub-driving block buries the sub-core fixing member in the fixed countersunk hole, so that the sub-core fixing member is not easy to fall out of the sub-connector, and even after multiple core pulling actions of the mother-child core pulling mechanism, the sub-core fixing member is not easy to loosen and detach, which is conducive to ensuring the connection stability between the sub-core and the sub-connector.

[0022] Optionally, a first rubber strip groove is formed on the inner wall of the sub-core slot of the sub-connector, and a second rubber strip groove corresponding to the first rubber strip groove is formed on the sub-core, and a shock-absorbing rubber strip is passed between the first rubber strip groove and the second rubber strip groove.

[0023] By adopting the above technical scheme, the shock-absorbing rubber strip can not only serve as a positioning rubber ring to play a role in positioning and stabilizing when the sub-core is inserted into the sub-core slot, but also serve as a buffer between the sub-core and the sub-connector, thereby reducing the mechanical vibration generated between the sub-core and the sub-connector during die casting or core pulling, which is beneficial to reduce the wear between the sub-core and the sub-connector.

[0024] Optionally, the female drive assembly includes a drive support plate, a female drive member and a limiting member, the drive support plate is fixedly disposed on the fixed seat, the female drive member is installed on the side of the drive support plate away from the fixed seat, the sub-mounting seat is provided with a female drive slot, the driving end of the female drive member passes through the drive support plate and is connected to a female drive block that is mutually engaged with the female drive slot, and the limiting member is installed on the drive support plate, and the limiting member is used to limit the sliding distance of the sub-mounting seat driven by the female drive member.

[0025] Optionally, the limiting component includes a positioning block, a limiting rod and a limiting block, the positioning block is fixedly arranged on the driving support plate, the limiting rod is slidably connected to the positioning block, one end of the limiting rod is fixedly connected to the driving end of the female driving member, the limiting block is movably mounted on the end of the limiting rod away from the driving end of the female driving member, the limiting block is threadedly connected with a fastener, and the fastener passes through the limiting block and presses against the limiting rod.

[0026] By adopting the above technical solution, when the female driving component drives the sub-mounting seat to start moving, the driving end of the female driving component will also move with the limiting rod. At this time, the mutual cooperation of the positioning block and the limiting block can limit the moving distance of the limiting rod, and then the extension length of the driving end of the female driving component can be limited, which is beneficial to prevent the female driving component from losing control and causing the sub-mounting seat and the female core to excessively impact the mold body.

[0027] Optionally, the fixing seat is provided with a guide slot, the sub-mounting seat is provided with a guide slider, and the guide slider is slidably disposed in the guide slot of the fixing seat.

[0028] By adopting the above technical solution, a guide groove is set to guide the sliding direction of the sub-mounting seat, which is beneficial to ensure the accuracy and stability of the sub-mounting seat and the female core during movement, and prevent the sub-mounting seat and the female core from being offset during the core pulling process.

[0029] Optionally, a needle roller row is further provided in the guide slide groove, and the guide sliding block is rollingly connected to the guide slide groove via the needle roller row.

[0030] By adopting the above technical solution, the needle roller row can reduce the sliding friction between the guide slider and the guide groove, so that the guide slider can slide smoothly along the guide slider, which is beneficial to further prevent the problem of the female mounting seat and the female core getting stuck during the core pulling process.

[0031] In summary, the technical solution of this application has at least one of the following beneficial effects:

[0032] 1. Through the synergistic effect of the mother die set and the child die set in the mother-child core pulling mechanism, the core pulling action in different directions can be completed during one mold opening process. There is no need to set up multiple sets of core pulling mechanisms or machining, so that the die casting can simultaneously form straight core holes and oblique core holes with different extension directions, which is conducive to shortening the production cycle and improving the production efficiency of die castings. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a structural schematic diagram of a die casting in the prior art.

[0034] Figure 2 It is a top view of a mold with a mother-and-child core-pulling structure in an embodiment of the present application.

[0035] Figure 3 yes Figure 2 Cross-sectional view of AA.

[0036] Figure 4 It is a structural schematic diagram of a mother-and-child core pulling mechanism of a mold with a mother-and-child core pulling structure in an embodiment of the present application.

[0037] Figure 5 yes Figure 4 A partial enlarged view of a.

[0038] Figure 6 It is a front view of the sub-module of the mother-and-child core pulling mechanism in the embodiment of the present application.

[0039] Figure 7 yes Figure 6Cross-sectional view of BB.

[0040] Description of reference numerals:

[0041] 1. Die casting; 11. Moulding surface; 12. Straight core hole; 13. Oblique core hole; 2. Mould body; 21. Mould cavity; 3. Mother-child core pulling mechanism; 31. Fixing seat; 311. Guide slide; 312. Needle roller; 32. Mother mould assembly; 321. Sub-mounting seat; 3211. Guide slide; 3212. Mother drive slot; 322. Mother drive assembly; 3221. Drive support plate; 3222. Mother drive member; 32221. Mother drive block; 3223. Limiting member; 32231. Positioning block; 32232 , limit rod; 32233, limit block; 32234, fastener; 323, mother core; 3231, profile part; 3232, mother core part; 33, sub-module; 331, sub-drive part; 3311, sub-drive block; 332, sub-connector; 3321, sub-drive slot; 3322, sub-core slot, 3323, fixed countersunk hole; 3324, sub-core fixing part; 3325, shock-absorbing rubber strip; 333, sub-core; 3331, plug-in part; 3332, extension part; 3333, sub-core part. DETAILED DESCRIPTION

[0042] The following is combined with Figure 1-7 This application is described in further detail.

[0043] A die casting 1 is provided, wherein a molding surface 11 to be molded is provided on one side of the die casting 1, and a straight core hole 12 and an oblique core hole 13 with different extending directions are opened on one side of the molding surface 11.

[0044] The present application embodiment discloses a mold having a mother-child core-pulling structure. Figure 2 and Figure 3 A mold with a mother-and-child core-pulling structure is used to form a die-casting 1 in the prior art, including a mold body 2 and a mother-and-child core-pulling mechanism 3, wherein a cavity 21 for molding the die-casting 1 as a whole is opened on the inner side of the mold body 2, and the mother-and-child core-pulling mechanism is used to cooperate with the cavity 21 of the mold body 2 to form the mold surface 11 of the die-casting 1 and the straight core holes 12 and the inclined core holes 13 with different extension directions.

[0045] Specifically, refer to Figure 3 and Figure 4The mother-child core pulling mechanism includes a fixing seat 31, a mother module 32 and a sub-module 33. The fixing seat 31 is detachably arranged on one side of the mold body 2, the mother module 32 is mounted on the fixing seat 31, and the sub-module 33 is arranged inside the mother module 32. The mother module 32 and the sub-module 33 are respectively provided with independent driving devices, so that the mother module 32 and the sub-module 33 can respectively perform core pulling actions in different directions, and because the sub-module 33 is arranged inside the mother module 32, the sub-module 33 can first independently complete the core pulling, hide in the mother module 32, and then pull the core together with the mother module 32, so that the core pulling actions in different directions can be completed in one mold opening process, so that the mold surface 11, the straight core hole 12 and the oblique core hole 13 of the die casting 1 are integrally formed with the die casting 1 during the die casting process, which is beneficial to improve the production efficiency of the die casting 1.

[0046] Reference Figure 3 , Figure 4 and Figure 5 In this embodiment, the female mold assembly 32 is used to form the mold surface 11 and the straight core hole 12 of the die casting 1. Specifically, the female mold assembly 32 includes a sub-mounting seat 321, a female driving assembly 322 and a female core 323. The sub-mounting seat 321 is slidably connected to the fixed seat 31, the female driving assembly 322 is mounted on the end of the fixed seat 31 away from the mold body 2, the female core 323 is arranged at the end of the sub-mounting seat 321 facing the cavity, and the end of the female core 323 away from the sub-mounting seat 321 is provided with a mold surface piece 3231 for forming the mold surface 11 and a female core piece 3232 for forming the straight core hole 12. The female driving assembly 322 is used to drive the sub-mounting seat 321 and the female core 323 to move back and forth in the direction of the cavity 21, so as to realize the core pulling action of the female mold assembly 32.

[0047] Reference Figure 3 and Figure 4 Furthermore, the fixed seat 31 is provided with a guide groove 311, the extension direction of the guide groove 311 is the same as the extension direction of the straight core hole 12 of the die-casting 1, a needle roller row 312 is arranged in the guide groove 311, and the sub-mounting seat 321 is provided with a guide slider 3211, the guide slider 3211 is slidably arranged in the guide groove 311 of the fixed seat 31, and is rollingly connected with the fixed seat 31 through the needle roller row 312.

[0048] Reference Figure 4The female drive module includes a drive support plate 3221, a female drive member 3222 and a limit member 3223. The drive support plate 3221 is detachably arranged on the fixed seat 31. The female drive member 3222 is installed on the side of the drive support plate 3221 away from the fixed seat 31. The sub-mounting seat 321 is provided with a female drive slot 3212. The driving end of the female drive member 3222 passes through the drive support plate 3221 and is provided with a female drive block 32221. The female drive member 3222 is mutually engaged with the sub-mounting seat 321 through the female drive block 32221. Among them, the female drive member 3222 can select any one of a servo cylinder, a servo hydraulic cylinder or a servo electric cylinder. In this embodiment, the female drive member 3222 selects a servo hydraulic cylinder to ensure that the female drive member 3222 has sufficient strength and precision, which is conducive to the smooth progress of the core pulling process.

[0049] Reference Figure 4 The limiting component 3223 includes a positioning block 32231, a limiting rod 32232 and a limiting block 32233, wherein the positioning block 32231 is fixedly arranged on the driving support plate 3221, the limiting rod 32232 is penetrated in the positioning block 32231 and is slidably connected to the positioning block 32231, one end of the limiting rod 32232 is fixedly connected to the driving end of the female driving member 3222, and the limiting block 32233 is movably sleeved on the end of the limiting rod 32232 away from the driving end of the female driving member 3222, so that when the female driving member 3222 is engaged, the limiting block 32233 is movable. When the driving member 3222 drives the sub-mounting seat 321 to move, the driving end of the female driving member 3222 will also move along the positioning block 32231 with the limiting rod 32232. At this time, the moving distance of the limiting rod 32232 can be limited by the mutual cooperation of the positioning block 32231 and the limiting block 32233, thereby limiting the extension length of the driving end of the female driving member 3222, which is beneficial to prevent the female driving member 3222 from losing control and causing the sub-mounting seat 321 and the female core 323 to excessively impact the mold body 2.

[0050] Furthermore, the limit block 32233 is threadedly connected with a fastener 32234, and the fastener 32234 is used to fix the limit block 32233 on the limit rod 32232. Specifically, in the present embodiment, the fastener 32234 is a fastening screw, and the fastener 32234 passes through the limit block 32233 and presses against the limit rod 32232.

[0051] Reference Figure 6 and Figure 7, the sub-module 33 includes a sub-driver 331, a sub-connector 332 and a sub-core 333, wherein the sub-connector 332 is used to detachably connect the sub-driver 331 and the sub-core 333, so as to facilitate the subsequent replacement or routine disassembly and maintenance of the various components of the sub-module 33. Specifically, the sub-driver 331 is fixedly mounted on the sub-mounting seat 321, the driving end of the sub-driver 331 is mutually engaged with the sub-connector 332, and the side of the sub-connector 332 facing the ion driver 331 is detachably connected to the sub-core 333. Further, the sub-driver 331 is slidably buried inside the sub-mounting seat 321 and the mother core 323, and the sub-driver 331 is used to drive the sub-core 333 to slide in a direction different from the movement direction of the sub-mounting seat 321, and the sub-core 333 can extend or retract from the mother core 323 by sliding, so that the sub-core 333 can form an oblique core hole 13 with a different extension direction from the straight core hole 12. The sub-driving component 331 may be any one of a servo cylinder, a servo hydraulic cylinder or a servo electric cylinder. In the present embodiment, the sub-driving component 331 is also a servo hydraulic cylinder.

[0052] Reference Figure 6 and Figure 7 The sub-core 333 includes a plug-in portion 3331, an extension portion 3332 and a sub-core member 3333, wherein the plug-in portion 3331 and the sub-connector 332 are connected to each other, one end of the extension portion 3332 is connected to the plug-in portion 3331, and the other end is connected to the sub-core member 3333, and the sub-core member 3333 can be extended or retracted from the female core 323 by sliding, and is used to form the oblique core hole 13. In this embodiment, the plug-in portion 3331, the extension portion 3332 and the sub-core member 3333 are prepared by integral molding, and the connection between the plug-in portion 3331, the extension portion 3332 and the sub-core member 3333 is smoothly transitioned, and the edges of the plug-in portion 3331 and the extension portion 3332 are both rounded.

[0053] Further, see Figure 3 and Figure 7 The cross-sectional area of ​​the extension portion 3332 gradually decreases from the end close to the plug-in portion 3331 to the end close to the sub-core member 3333, and then the extension portion 3332 forms a prism structure with rounded edges. When the sub-core 333 is core-pulling, the contact area between the sub-core 333 and the inside of the female core 323 is reduced, which can greatly reduce the friction during core pulling. This can not only reduce the load on the sub-driving member 331 during core pulling, but also reduce the wear between the sub-core 333 and the female core 323, which is beneficial to extending the service life of the sub-driving member 331 and the sub-core 333.

[0054] Reference Figure 6 and Figure 7A sub-driving slot 3321 is provided on one side of the sub-connecting member 332, and a sub-driving block 3311 which is mutually engaged with the sub-driving slot 3321 is provided on the driving end of the sub-driving member 331. A sub-core slot 3322 is provided on the other side of the sub-connecting member 332, and the sub-core 333 is inserted into the sub-core slot 3322 through the plug-in portion 3331 to be plug-connected with the connecting member.

[0055] Further, see Figure 7 The sub-connecting member 332 is provided with a fixed counterbore 3323 inside, the fixed counterbore 3323 is connected with the sub-driving slot 3321 and the sub-core slot 3322, and a sub-core fixing member 3324 is inserted into the fixed counterbore 3323 from one side of the sub-driving slot 3321, and is threadedly connected with the sub-core 333 located in the sub-core slot 3322. At the same time, the part of the sub-driving block 3311 inserted into the sub-driving slot 3321 just covers the outside of the fixed counterbore 3323, and can bury the sub-core fixing member 3324 in the fixed counterbore 3323, so that the sub-core fixing member 3324 is not easy to fall out of the sub-connecting member 332, and the connection stability between the sub-core 333 and the sub-connecting member 332 can be fully ensured.

[0056] Reference Figure 7 The inner wall of the fixed counterbore 3323 of the sub-connector 332 is provided with a first rubber strip groove, and the plug-in portion 3331 of the sub-core 333 is provided with a second rubber strip groove, the first rubber strip groove and the second rubber strip groove correspond to each other, and a shock-absorbing rubber strip 3325 is inserted between the first rubber strip groove and the second rubber strip groove. The shock-absorbing rubber strip 3325 is not only used to play a role in clamping, positioning and stabilizing when the sub-core 333 is inserted into the sub-core slot 3322, but also can reduce the mechanical vibration generated between the sub-core 333 and the sub-connector 332 during die casting or core pulling, which is beneficial to reduce the wear between the sub-core 333 and the sub-connector 332.

[0057] The implementation principle of a mold with a mother-child core-pulling structure in the embodiment of the present application is:

[0058] By arranging a sub-module 33 inside the mother module 32 and arranging independent driving devices respectively, the mother module 32 and the sub-module 33 can respectively complete the core pulling action in different directions, so that the mold surface 11, the straight core hole 12 and the inclined core hole 13 of the die-casting 1 can be integrally formed with the die-casting 1 during the die-casting process, without setting up multiple sets of core pulling mechanisms or machining, which is beneficial to shortening the production cycle of the die-casting 1 and improving production efficiency.

[0059] Before die-casting, the female driving component 3222 drives the sub-mounting seat 321 to slide along the guide groove 311 of the fixed seat 31 until the molding surface component 3231 of the female core 323 is flush with the side wall of the cavity 21, and then the sub-driving component 331 drives the sub-core 333 to slide along the inside of the female core 323 until the sub-core component 3333 of the sub-core 333 extends out of the female core 323 by a specified length. At this time, the preparation of the core before die-casting is completed.

[0060] After the die-casting is completed, the sub-driving component 331 drives the sub-core 333 to retract into the interior of the female core 323, and performs the core-pulling action of the sub-core 333, until the sub-core component 3333 of the sub-core 333 is separated from the inclined core hole 13 of the die-casting 1 and is completely retracted into the interior of the female core 323. At this time, the sub-core 333 will not affect the withdrawal of the female core 323, and then the female driving component 3222 can drive the sub-mounting seat 321 to slide along the fixed seat 31 to perform the core-pulling action of the female core 323, until the female core component 3232 of the female core 323 is separated from the straight core hole 12 of the die-casting 1, and the overall core-pulling action of the sub-mother and child core-pulling mechanism 3 is completed.

[0061] This specific implementation manner is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make non-creative modifications to the specific implementation manner as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. A mold with a mother-and-child core-pulling structure, characterized in that: include: A mold body (2), wherein a mold cavity (21) for molding a die-casting is formed inside the mold body (2); A mother-and-child core-pulling mechanism (3), the mother-and-child core-pulling mechanism (3) comprising a fixing seat (31), a mother mold group (32) and a child mold group (33), the fixing seat (31) being arranged on one side of the mold body (2), the mother mold group (32) being mounted on the fixing seat (31), and the child mold group (33) being arranged inside the mother mold group (32); The female mold assembly (32) comprises a sub-mounting seat (321), a female driving assembly (322) and a female core (323); the sub-mounting seat (321) is slidably connected to the fixed seat (31); the female driving assembly (322) is mounted on the fixed seat (31) and is used to drive the sub-mounting seat (321) to slide back and forth in the direction of the cavity (21); and the female core (323) is arranged at one end of the sub-mounting seat (321) facing the cavity (21); The sub-module (33) comprises a sub-driving member (331) and a sub-core (333); the sub-driving member (331) is mounted on the sub-mounting seat (321); a driving end of the sub-driving member (331) is connected to the sub-core (333); the sub-core (333) is slidably arranged inside the sub-mounting seat (321) and the female core (323); the sub-driving member (331) is used to drive the sub-core (333) to slide in a direction different from the movement direction of the sub-mounting seat (321); and the sub-core (333) can extend from or retract into the female core (323) by sliding; The female core (323) comprises a profile piece (3231) and a female core piece (3232); the profile piece (3231) and the side wall of the cavity (21) correspond to each other and are flush with each other; and the extension direction of the female core piece (3232) and the sliding direction of the sub-mounting seat (321) are parallel to each other; The sub-core (333) comprises a plug-in portion (3331), an extension portion (3332) and a sub-core member (3333); the plug-in portion (3331) is connected to the sub-driving member (331); one end of the extension portion (3332) is connected to the plug-in portion (3331) and the other end is connected to the sub-core member (3333); the sub-core member (3333) can be extended from or retracted into the female core (323) by sliding; the plug-in portion (3331), the extension portion (3332) and the sub-core member (3333) are made by integral molding; the connection between the plug-in portion (3331), the extension portion (3332) and the sub-core member (3333) is smoothly transitioned, and the edges of the plug-in portion (3331) and the extension portion (3332) are rounded; The sub-module (33) further comprises a sub-connecting member (332), wherein the sub-connecting member (332) is used to connect the sub-driving member (331) and the sub-core (333); A sub-driving slot (3321) is provided on one side of the sub-connecting member (332); a sub-driving block (3311) is provided at the driving end of the sub-driving member (331) and is mutually engaged with the sub-driving slot (3321); a sub-core slot (3322) is provided on the other side of the sub-connecting member (332); the sub-core (333) is plug-connected to the sub-connecting member (332) via the sub-core slot (3322); a fixing countersunk hole (3323) is also provided inside the sub-connecting member (332); the fixing countersunk hole (332 3) the sub-drive slot (3321) and the sub-core slot (3322) are connected, a sub-core fixing piece (3324) is inserted into the fixing countersunk hole (3323), the sub-core fixing piece (3324) is inserted into the fixing countersunk hole (3323) from one side of the sub-drive slot (3321), and is threadedly connected to the sub-core (333), the sub-drive block (3311) is covered on the outside of the fixing countersunk hole (3323), and the sub-core fixing piece (3324) can be buried in the fixing countersunk hole (3323).

2. The mold with a mother-and-child core-pulling structure according to claim 1, characterized in that: The cross-sectional area of ​​the extension portion (3332) gradually decreases from an end close to the plug-in portion (3331) toward an end of the sub-core member (3333).

3. The mold with a mother-and-child core-pulling structure according to claim 1, characterized in that: A first rubber strip groove is formed on the inner wall of the sub-core slot (3322) of the sub-connector (332), and a second rubber strip groove corresponding to the first rubber strip groove is formed on the sub-core (333), and a shock-absorbing rubber strip (3325) is passed between the first rubber strip groove and the second rubber strip groove.

4. The mold with a mother-and-child core-pulling structure according to claim 1, characterized in that: The female drive assembly (322) comprises a drive support plate (3221), a female drive member (3222) and a limiting member (3223); the drive support plate (3221) is fixedly arranged on the fixing seat (31); the female drive member (3222) is installed on a side of the drive support plate (3221) away from the fixing seat (31); the sub-mounting seat (321) is provided with a female drive slot (3212); the driving end of the female drive member (3222) passes through the drive support plate (3221) and is connected to a female drive block (32221) that is mutually engaged with the female drive slot (3212); the limiting member (3223) is installed on the drive support plate (3221); and the limiting member (3223) is used to limit the sliding distance of the female drive member (3222) in driving the sub-mounting seat (321).

5. The mold with a mother-and-child core-pulling structure according to claim 4, characterized in that: The limiting component (3223) comprises a positioning block (32231), a limiting rod (32232) and a limiting block (32233); the positioning block (32231) is fixedly arranged on the driving support plate (3221); the limiting rod (32232) is slidably connected to the positioning block (32231); one end of the limiting rod (32232) is fixedly connected to the driving end of the female driving member (3222); the limiting block (32233) is movably sleeved on one end of the limiting rod (32232) away from the driving end of the female driving member (3222); the limiting block (32233) is threadedly connected with a fastener (32234); the fastener (32234) passes through the limiting block (32233) and presses against the limiting rod (32232).

6. The mold with a mother-and-child core-pulling structure according to claim 1, characterized in that: The fixing seat (31) is provided with a guide slot (311), the sub-mounting seat (321) is provided with a guide slider (3211), and the guide slider (3211) is slidably disposed in the guide slot (311) of the fixing seat (31).

7. The mold with a mother-and-child core-pulling structure according to claim 6, characterized in that: A needle roller row (312) is also provided in the guide slide groove (311), and the guide sliding block (3211) is rollingly connected to the guide slide groove (311) via the needle roller row (312).

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