Die-casting die with automatic slag ladle breaking function

Abstract

A die-casting die with automatic slag ladle breaking function, comprising a fixed die, the fixed die comprising a front back plate, a slag ladle forming part and a front die core, the front back plate being used for mounting to a die-casting equipment, the slag ladle forming part being fixedly connected to the front back plate, an end of the slag ladle forming part away from the front back plate being provided with a slag ladle cavity, the front die core being movable relative to the front back plate, the front die core being provided with a communication channel, one end of the communication channel being communicated with the slag ladle cavity; a movable die, the movable die comprising a rear die core, a type cavity being formed between the front die core and the rear die core, the other end of the communication channel being communicated with the type cavity; a locking part, used for making the front back plate and the front die core open earlier than the front die core and the rear die core in the process of opening the die so as to break the slag ladle before the type cavity is opened. Compared with the prior art, the die-casting die effectively alleviates the problems of insufficient material and non-compaction of the die-casting raw material in the type cavity, and improves the product quality. In addition, the function of automatically breaking the slag ladle is also realized, and the structure is simple and compact.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of die casting mold, in particular to a die casting mold with automatic slag ladle breaking function. BACKGROUND

[0002] Die casting products often arrange features such as hooks for assembly or fastening with opponent parts due to the need of function and performance.

[0003] However, since the hooks form a closed space in the cavity, the cold material or air in the molding process cannot be discharged, the gas mixes into the die casting raw material or is compressed by the material to form a counterforce on the material, thereby hindering the uniform filling of the die casting raw material in the cavity, resulting in the phenomenon of underfilling or undercompaction of the hooks, which will directly affect the strength or density of the hooks.

[0004] To solve this technical problem, the prior art arranges a runner structure on the side of the mold to arrange a slag ladle, discharges the initial material in the mold cavity into the slag ladle, and removes the slag ladle after molding. However, the product made by this method has a residual bond line on the surface, and a bond line step or flash is generated, which will directly affect the quality of the product. In addition, part of the hooks cannot be arranged with a runner structure due to their location in the center of the product or other features blocking, which leads to the phenomenon of underfilling or undercompaction of the hooks in the cavity. SUMMARY

[0005] The present application aims to overcome the shortcomings of the prior art and provide a die casting mold with automatic slag ladle breaking function.

[0006] To achieve the above purpose, the present application discloses a die casting mold with automatic slag ladle breaking function, comprising:

[0007] The fixed mold comprises a front back plate, a slag ladle forming part and a front mold core, the front back plate is used to be installed on a die casting equipment, the slag ladle forming part is fixedly connected to the front back plate, an end of the slag ladle forming part away from the front back plate is provided with a slag ladle cavity, the front mold core is movable relative to the front back plate, and a communication channel is arranged on the front mold core, one end of the communication channel is in communication with the slag ladle cavity;

[0008] The movable mold comprises a rear mold core, a type cavity is formed between the front mold core and the rear mold core, and the other end of the communication channel is in communication with the type cavity;

[0009] The locking part is used to open the front back plate and the front mold core before the front mold core and the rear mold core are opened during mold opening, so as to break the slag ladle before the type cavity is opened.

[0010] Preferably, the slag ladle cavity has a pulling groove.

[0011] Further preferably, the pulling groove is arranged along the axial direction of the ladle cavity.

[0012] Preferably, the communication channel comprises a mold cavity channel and a buffer channel connected in sequence and close to the ladle cavity, the end of the mold cavity channel away from the buffer channel is connected with the mold cavity, and the end of the buffer channel away from the mold cavity is connected with the ladle cavity.

[0013] Further preferably, the length of the buffer channel is 10-50 mm.

[0014] Further preferably, the shape of the buffer channel is conical frustum, and the diameter gradually decreases in the direction from the mold cavity to the ladle cavity.

[0015] Preferably, the front mold core is provided with an annular groove, and the outer contour of the annular groove is connected with the side wall of the ladle cavity.

[0016] Further preferably, the buffer channel is connected to the lower part of the annular groove.

[0017] Preferably, the fixed mold further comprises a front blank plate, the front blank plate is movable relative to the front back plate, the front blank plate is provided with a through groove, the ladle forming part passes through the through groove so that the ladle cavity is connected with the communication channel, and the front mold core is fixedly connected to the front blank plate.

[0018] The ladle forming part is provided with an ejection assembly, the ejection assembly comprises an inner ejection insert and an inner ejector pin, the inner ejection insert is fixedly connected to the front blank plate, and in the process of opening the front mold core and the rear mold core, the inner ejection insert is in abutting fit with the inner ejector pin so as to drive the inner ejector pin to move towards the ladle cavity.

[0019] Further preferably, the ladle forming part is provided with an assembly cavity, the ejection assembly is arranged in the assembly cavity, the ladle forming part is provided with a partition, the partition is provided with a guide sealing hole, the guide sealing hole connects the assembly cavity and the ladle cavity, and the inner ejector pin is in sliding fit with the guide sealing hole.

[0020] Compared with the prior art, the die casting mold with the automatic ladle breaking function has the following beneficial effects: in the closed mold state, the front mold core and the rear mold core form a mold cavity, and the ladle cavity is connected with the mold cavity through a communication channel. When the glue is injected, the cold material, air and molten glue in the mold cavity will flow into the ladle cavity through the communication channel, which effectively relieves the problems of insufficient material and non-dense material of the die casting raw material in the mold cavity, and improves the strength, density and quality of the molded product.

[0021] After cooling, the slag ladle is formed in the slag ladle cavity, when the mold is opened, the front mold core and the movable mold are separated from the front back plate under the action of the locking member, namely the slag ladle cavity is separated from the communication channel. The slag ladle in the slag ladle cavity and the product in the communication channel are pulled off by the bonding force between the slag ladle and the slag ladle cavity wall and the force generated during the separation of the integral structure and the front back plate, so that the automatic separation of the slag ladle and the product is realized. By setting the slag ladle forming member and using the bonding force between the slag ladle and the slag ladle cavity wall and the force generated during the separation of the integral structure and the front back plate to pull off the slag ladle, the function of automatically pulling off the slag ladle is realized, and the structure is simple and compact. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the die casting mold with automatic slag ladle pulling-off function of the application;

[0023] Figure 2 It is Figure 1 a sectional view of the die casting mold;

[0024] Figure 3 It is Figure 2 a partial enlarged view of position A in the die casting mold;

[0025] Figure 4 It is Figure 3 a partial enlarged view of position B in the die casting mold;

[0026] Figure 5 It is a schematic diagram of the three-dimensional structure of the slag ladle forming member;

[0027] Figure 6 It is a schematic diagram of the three-dimensional structure of the slag ladle forming member and the ejection assembly in the exploded state;

[0028] Fixed mold 1; front back plate 11; front mold core pad 12; front blank plate 13; front mold core 14; communication channel 141; cavity channel 1411; buffer channel 1412; annular groove 142;

[0029] Movable mold 2; rear back plate 21; square block 22; ejection system 23; rear blank plate 24; rear mold core 25;

[0030] Locking member 3;

[0031] Slag ladle forming member 4; slag ladle cavity 41; pulling slot 411; assembly cavity 42; sliding groove 421; mounting groove 422; partition 43; guide sealing hole 431;

[0032] Ejection assembly 5; inner ejection insert 51; sliding hole 511; inner ejector pin 52; boss 521; reset member 53. DETAILED DESCRIPTION

[0033] In the description of the present application, it should be understood that the terms "inner", "outer" and the like indicate the positional or location relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0034] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0035] In addition, different embodiments or examples described in the specification and the features of different embodiments or examples can be combined and combined by those skilled in the art without contradiction.

[0036] The technical solutions of the present application will be further described below in conjunction with the accompanying drawings Figures 1-6 The technical solutions of the present application will be further described below in conjunction with the accompanying drawings

[0037] A die-casting die with automatic slag ladle breaking function, referring to Figures 1-4 , comprising a fixed mold 1, a movable mold 2 and a locking member 3. The fixed mold 1 comprises a front back plate 11, a slag ladle forming member 4 and a front mold core 14 arranged in sequence; the front back plate 11 is used for mounting to a die-casting equipment, which is fixed during use; the slag ladle forming member 4 is detachably connected to the front back plate 11, and the end of the slag ladle forming member 4 away from the front back plate 11 is provided with a slag ladle cavity 41; the front mold core 14 is movable relative to the front back plate 11, and the front mold core 14 is provided with a communication passage 141, one end of the communication passage 141 being communicated with the slag ladle cavity 41. The movable mold 2 comprises a rear mold core 25, and the front mold core 14 and the rear mold core 25 form a mold cavity, and the other end of the communication passage 141 is communicated with the mold cavity. The locking member 3 is used for opening the front back plate 11 and the front mold core 14 before the front mold core 14 and the rear mold core 25 during mold opening, so as to break the slag ladle before the mold cavity is opened.

[0038] In use, in the closed mold state, the front mold core 14 and the rear mold core 25 form a mold cavity, and the slag ladle cavity 41 is communicated with the mold cavity through the communication passage 141. During glue injection, the cold material, air and molten glue in the mold cavity will flow into the slag ladle cavity 41 through the communication passage 141, which effectively relieves the problem of insufficient material and non-compactness of the die-casting raw material in the mold cavity, and improves the strength, density and quality of the molded product.

[0039] After the cooling, the slag ladle is formed in the slag ladle cavity 41. When the mold is opened, the front mold core 14 and the movable mold 2 are separated from the front back plate 11 as a whole (hereinafter referred to as "the whole structure") under the action of the locking member 3. The whole structure is first separated from the front back plate 11 (the distance of separation is hereinafter referred to as "the first distance"), i.e. the slag ladle cavity 41 is separated from the communication channel 141. By means of the bonding force between the slag ladle and the wall surface of the slag ladle cavity 41 and the force generated during the separation of the whole structure from the front back plate 11, the slag ladle in the slag ladle cavity 41 and the product in the communication channel 141 are pulled apart, thereby realizing the automatic separation of the slag ladle and the product. By setting the slag ladle forming member 4 and by means of the bonding force between the slag ladle and the wall surface of the slag ladle cavity 41 and the force generated during the separation of the whole structure from the front back plate 11 to pull apart the slag ladle, the function of automatically pulling apart the slag ladle is realized, and the structure is simple and compact.

[0040] When the whole structure is separated from the front back plate 11 by the first distance, the front mold core 14 is separated from the movable mold 2, and the mold cavity is opened, so that the product can be taken out.

[0041] In the present embodiment, the fixed mold 1 further comprises a front blank plate 13 and a front mold core pad plate 12. The front blank plate 13 is movable relative to the front back plate 11, and the front mold core pad plate 12 is fixed to the front blank plate 13. The front mold core 14 described above is fixed to the front mold core pad plate 12. The movable mold 2 further comprises a rear back plate 21, a square block 22 fixed to the rear back plate 21 and an ejection system 23, and a rear blank plate 24 fixed to the square block 22. The rear mold core 25 described above is fixed to the rear blank plate 24. One end of the locking member 3 is connected to the front blank plate 13, and the other end is connected to the rear blank plate 24, so that the front back plate 11 and the front blank plate 13 are opened before the front blank plate 13 and the rear blank plate 24. The specific structure of the above-mentioned front blank plate 13, front mold core pad plate 12 and fixed mold 1 is a common structure of existing die casting molds, and the specific structure will not be described here.

[0042] In the present embodiment, the locking member 3 is preferably an opener. In actual production and manufacturing process, the type of the opener can be selected according to actual needs.

[0043] In the present embodiment, the end surface of the slag ladle forming member 4 away from the front back plate 11 abuts against the front mold core 14, so as to realize the sealed communication between the slag ladle cavity 41 and the communication channel 141.

[0044] In the present embodiment, referring to Figures 3-5The drawing-out groove 411 is arranged in the axial direction of the slag ladle cavity 41, which is consistent with the top-out direction of the top-out assembly 5, which will be described below. The drawing-out groove 411 is arranged in the slag ladle cavity 41, which increases the bonding area of the molten glue and the drawing-out groove 411, and improves the demolding resistance of the slag ladle, further ensuring that the slag ladle can be broken. In addition, the drawing-out groove 411 is arranged in the axial direction of the slag ladle cavity 41, so that when the front blank plate 13 and the rear blank plate 24 are separated, the drawing-out groove 411 will not hinder the movement of the slag ladle, and the top-out assembly 5 can smoothly top out the slag ladle, ensuring that the slag ladle can be automatically ejected during mold opening.

[0045] In the embodiment, referring to Figures 3-4 , the communication channel 141 includes a cavity channel 1411 and a buffer channel 1412 which are connected and sequentially close to the slag ladle cavity 41. The end of the cavity channel 1411 away from the buffer channel 1412 is in communication with the cavity, and during the die casting process, the cavity channel 1411 functions the same as the cavity and is also used for forming the product. The end of the buffer channel 1412 away from the cavity is in communication with the slag ladle cavity 41. The above communication is not only used to communicate the cavity and the slag ladle cavity 41, but also to avoid the problem of saturation and non-compactness of the product in the cavity. In addition, during the separation of the front blank plate 13 and the overall structure, the slag ladle and the product can be broken in the buffer channel 1412, avoiding being broken in the cavity channel 1411 and causing the product to be scrapped.

[0046] In the embodiment, the length of the buffer channel 1412 is 10-50mm, which can ensure that the slag ladle and the product can be broken in the buffer channel 1412. As a further improvement, the shape of the buffer channel 1412 is a conical frustum, and its diameter gradually decreases in the direction from the cavity to the slag ladle cavity 41. In this way, the size of the connecting structure in the buffer channel 1412 is smaller and can be easily broken.

[0047] Referring to Figure 4 , the front die core 14 is provided with an annular groove 142, and the outer contour of the annular groove 142 is connected with the side wall of the slag ladle cavity 41. In this way, there is basically no corner structure between the slag ladle cavity 41 and the front blank plate 13, and when the front back plate 11 and the overall structure are separated, the slag ladle can be smoothly separated from the front blank plate 13. Further improvement, the buffer channel 1412 is connected to the lower part of the annular groove 142. In this way, the molten glue flows from the bottom of the space formed by the slag ladle cavity 41 and the annular groove 142, and the slag ladle formed after the molten glue cools down is a whole slag ladle, which is convenient for being ejected by the top-out assembly 5 and avoids the slag ladle remaining in the slag ladle cavity 41. In addition, when the front back plate 11 and the overall structure are separated, under the action of the pulling force and torque of the product on the slag ladle, the slag ladle and the product are more likely to break, making the slag ladle and the product separate.

[0048] In the embodiment, the front blank 13 is provided with a through slot, and the ladle forming part 4 passes through the through slot so that the end face of the ladle forming part 4 abuts against the front die core 14, and the ladle cavity 41 is in sealed communication with the communication passage 141. The through slot is arranged on the front blank 13, which not only realizes the communication between the ladle cavity 41 and the communication passage 141, but also makes the overall structure of the upper die more compact.

[0049] In the embodiment, the ladle forming part 4 is provided with an ejection assembly 5, which comprises an inner ejection insert 51 and an inner ejector pin 52, and the inner ejection insert 51 is fixedly connected to the front blank 13. When the front back plate 11 is separated from the overall structure by a first distance, the front back plate 11 is further separated from the overall structure, and at the same time (i.e. during the process of further separating the front back plate 11 from the overall structure), the front blank 13 is separated from the rear blank 24, and the front die core 14 and the rear die core 25 are opened. During the process, the inner ejection insert 51 and the inner ejector pin 52 abut and cooperate to drive the inner ejector pin 52 to move into the ladle cavity 41, thereby ejecting the ladle and realizing the function of automatically ejecting the ladle.

[0050] Referring to Figure 3 , the ladle forming part 4 is provided with an assembly cavity 42, and the ejection assembly 5 is installed in the assembly cavity 42, which makes the overall structure more compact. The ladle forming part 4 is provided with a partition 43, and the partition 43 is provided with a guide sealing hole 431, which communicates the assembly cavity 42 and the ladle cavity 41. The end of the inner ejector pin 52 close to the guide sealing hole 431 is arranged in the hole and in sliding and sealing cooperation with the hole. By arranging the sealing guide hole and making the inner ejector pin 52 in sliding and sealing cooperation with the hole, it can not only ensure that the inner ejector pin 52 can extend into the ladle cavity 41 to eject the ladle, but also improve the stability of the movement of the inner ejector pin 52. In addition, the inner ejector pin 52 is in sliding and sealing cooperation with the hole, which avoids the molten glue in the ladle cavity 41 from leaking into the guide sealing hole 431 and the assembly cavity.

[0051] In order to further limit the molten glue in the ladle cavity 41, referring to Figures 2-3 , the length of the inner ejector pin 52 is equal to the distance between the bottom surface of the ladle cavity 41 and the end surface of the front back plate 11 close to the ladle forming part 4, so that the end surface of the inner ejector pin 52 close to the ladle cavity 41 is flush with the bottom of the ladle cavity 41. In this way, the molten glue cannot flow into the guide sealing hole and the assembly cavity. In addition, during the glue injection process, since the end of the inner ejector pin 52 close to the front back plate 11 abuts against the front back plate 11, the large pressure in the front back plate 11 will not cause the inner ejector pin 52 to move, thereby ensuring that the inner ejector pin 52 can always be flush with the bottom of the ladle cavity 41 during the glue injection process.

[0052] In order to ensure that the ladle can be broken, the ladle should be bonded in the ladle cavity 41 and cannot be ejected during the process of separating the front back plate 11 from the overall structure by a first distance. However, during the process, the inner ejecting insert 51 will move to the side of the ladle cavity 41 along with the front blank plate 13. In order to avoid the inner ejecting insert 51 pressing against the inner ejecting pin 52 during the movement process, so that the inner ejecting pin 52 ejects the ladle, and further causes the ladle to be unable to be broken, see Figures 3-5 At least one side of the assembling cavity 42 is provided with an opening, in the embodiment, the opposite sides of the assembling cavity 42 and the end face close to the front back plate 11 are provided with openings, and the length of the opening along the moving direction of the inner ejecting pin 52 is greater than the length of the inner ejecting insert 51 in the direction, so that the inner ejecting insert 51 has a movable distance in the opening, and thus, during the process of separating the front back plate 11 from the overall structure by a first distance, the inner ejecting insert 51 can move by the first distance relative to the inner ejecting pin 52 without driving the inner ejecting pin 52 to move, which avoids ejecting the ladle during the process of breaking the ladle, and causes the ladle to be unable to be broken. When the inner ejecting insert 51 further moves along with the front blank plate 13, the inner ejecting insert 51 presses against the inner ejecting pin 52 to drive the inner ejecting pin 52 to move, so as to realize the automatic ejection function of the ladle.

[0053] Referring to 2-3, the inner ejecting pin 52 is provided with a boss 521, and the distance between the end face of the boss 521 close to the front back plate 11 and the end face of the inner ejecting insert 51 close to the ladle cavity 41 is the first distance in the closed mold state. When the inner ejecting insert 51 moves by the first distance along with the front blank plate 13, the inner ejecting insert 51 abuts against the boss 521, and when the inner ejecting insert 51 further moves along with the front blank plate 13, the inner ejecting insert 51 presses against the boss 521, and the inner ejecting pin 52 extends into the ladle cavity 41, so as to eject the ladle.

[0054] Referring to Figure 6 The inner ejecting insert 51 is provided with a sliding hole 511, and the end of the inner ejecting pin 52 close to the inner ejecting insert 51 is slidingly arranged in the sliding hole 511. In the embodiment, the sliding hole 511 is a through hole with both ends penetrating. When the front back plate 11 and the overall structure are separated, the end of the inner ejecting pin 52 close to the front back plate 11 can extend out of the sliding hole 511, so that the inner ejecting insert 51 can slide relative to the inner ejecting pin 52 without pressing against the inner ejecting pin 52.

[0055] Referring to Figure 6 The ejecting assembly 5 further comprises a reset member 53, which is a spring in the embodiment. The two ends of the reset member 53 are respectively matched with the ladle forming member 4 and the boss 521, so as to drive the inner ejecting pin 52 to move to the initial position when the front blank plate 13 moves to the initial position.

[0056] Referring to Figures 5-6The assembling cavity 42 comprises a sliding groove 421 and a mounting groove 422 arranged at the bottom of the sliding groove 421, the sliding groove 421 is provided with the opening, the bottom of the mounting groove 422 is communicated with the guide sealing hole 431, the mounting groove 422 is provided with the reset member 53, one end of the reset member 53 abuts against the bottom of the mounting groove 422, and the other end abuts against the convex strip, when the back plate 11 is separated from the whole structure and in the mold opening process, the reset member 53 is compressed, when the mold is recovered to the mold closing state, under the action of the reset member 53, the inner ejector pin 52 moves to the initial position.

[0057] In the embodiment, guide pillars are arranged between the fixed mold 1 and the movable mold 2, so that the stability of the fixed mold 1 and the movable mold 2 in the moving process can be improved.

[0058] Obviously, the above embodiments of the present application are only examples for clearly illustrating the present application, and are not intended to limit the implementation modes of the present application. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, all the implementation modes are not required or can not be exhausted. Any modification, equivalent replacement and improvement within the spirit and principle of the present application should be included in the protection scope of the claims of the present application.

Claims

1. A die-casting mold with an automatic slag-breaking function, characterized in that, include: The fixed mold includes a front back plate, a slag bag forming part, and a front mold core. The front back plate is used to be installed on the die casting equipment. The slag bag forming part is fixed to the front back plate. The end of the slag bag forming part away from the front back plate is provided with a slag bag cavity. The front mold core can move relative to the front back plate. The front mold core is provided with a connecting channel. One end of the connecting channel is connected to the slag bag cavity. The moving mold includes a rear mold core, a cavity is formed between the front mold core and the rear mold core, and the other end of the communicating channel is connected to the cavity. Locking element, used to cause the front back plate and front mold core to open before the front mold core and rear mold core during mold opening, thereby breaking the slag pack before the cavity opens; The fixed mold also includes a front blank plate, which is movable relative to the front back plate. The front blank plate is provided with a through groove, through which the slag bag forming part passes to connect the slag bag cavity with the connecting channel. The front mold core is fixedly connected to the front blank plate. The slag bag forming part is provided with an ejection assembly, which includes an inner ejector insert and an inner ejector pin. The inner ejector insert is fixed to the front blank plate. During the process of opening the front mold core and the rear mold core, the inner ejector insert and the inner ejector pin press against each other, thereby driving the inner ejector pin to move into the slag bag cavity. The slag bag forming part is provided with an assembly cavity, the ejector assembly is provided in the assembly cavity, the slag bag forming part is provided with a partition, the partition is provided with a guide sealing hole, the guide sealing hole connects the assembly cavity and the slag bag cavity, and slides and cooperates with the inner ejector pin. The length of the inner ejector pin is equal to the distance between the bottom surface of the slag bag cavity and the end face of the front back plate near the slag bag forming part; The assembly cavity has openings on both sides opposite to each other and on the end face near the front back plate. The length of the opening along the moving direction of the inner ejector pin is greater than the length of the inner ejector insert in that direction. The front mold core is provided with an annular groove, and the outer contour of the annular groove is connected to the side wall of the slag cavity.

2. The die-casting mold with automatic slag-breaking function according to claim 1, characterized in that: The slag bag cavity has a drawing groove.

3. The die-casting mold with automatic slag-breaking function according to claim 2, characterized in that: The drawing groove is arranged along the axial direction of the slag cavity.

4. The die-casting mold with automatic slag-breaking function according to claim 1, characterized in that: The connecting channel includes a cavity channel and a buffer channel that are connected and sequentially close to the slag bag cavity. The end of the cavity channel away from the buffer channel is connected to the cavity, and the end of the buffer channel away from the cavity is connected to the slag bag cavity.

5. The die-casting mold with automatic slag-breaking function according to claim 4, characterized in that: The length of the buffer channel is 10–50 mm.

6. The die-casting mold with automatic slag-breaking function according to claim 4, characterized in that: The buffer channel is shaped like a frustum of a cone, and its diameter gradually decreases in the direction from the cavity to the slag cavity.

7. The die-casting mold with automatic slag-breaking function according to claim 4, characterized in that: The buffer channel connects to the bottom of the annular groove.

8. The die-casting mold with automatic slag-breaking function according to claim 1, characterized in that: The slag bag forming part is provided with an assembly cavity, the ejector assembly is provided in the assembly cavity, the slag bag forming part is provided with a partition, the partition is provided with a guide sealing hole, the guide sealing hole connects the assembly cavity and the slag bag cavity, and slides and cooperates with the inner ejector pin.

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