An automatic core-pulling mold

Abstract

The present application relates to the field of sand core manufacturing, in particular to an automatic core pulling mold, which includes an upper mold, a lower mold and a movable part, the lower end of the upper mold is provided with an upper molding groove, the upper end of the lower mold is provided with a lower molding groove, a movable groove and a connecting groove, the movable groove is provided at the outer periphery of the lower molding groove, the connecting groove is connected to the lower molding groove and the movable groove, the movable part includes a movable block, the movable block is hinged to the bottom of the movable groove, the hinge axis of the movable block and the lower mold is vertical, the movable block is fixedly connected to the outer wall of the lower molding groove with a protrusion, the protrusion passes through the connecting groove and extends into the lower molding groove. The protrusion extends into the lower molding groove to facilitate the formation of a groove on the outer wall of the sand core. When the formed sand core needs to be demolded, the movable block moves so that the protrusion is away from the sand core, which is convenient for demolding and improves the yield rate.

Description

Technical Field

[0001] The present application relates to the field of sand core manufacturing, and in particular to an automatic core pulling mold. Background Art

[0002] A sand core is an internal component of a casting mold made of molding sand. It is used to form the internal cavity, hole, or complex geometry of a casting when metal is poured. When the molten metal is poured into the mold, the sand core maintains its shape. After the metal solidifies, the sand core is removed, leaving the desired internal structure.

[0003] The sand core manufacturing process includes sand mixing, core making, hardening, trimming, coating, and drying. The hot core box method is a highly efficient sand core manufacturing process widely used in the foundry industry, particularly suitable for mass production of small to medium-sized sand cores with complex structures. The process utilizes a heated metal core box to rapidly cure the resin binder. The thermosetting resin undergoes a cross-linking reaction at high temperatures, imparting strength to the sand core.

[0004] The hot core box method uses a high-speed sand mixer to mix the sand, and a core shooter to shoot the mixed sand into a heated core box at a certain pressure. The core box controls the temperature to solidify it, and the ejection mechanism on the core box demoulds the sand core for post-processing.

[0005] However, some sand cores have grooves on their outer walls, and the mold is embedded in the grooves. The ejection mechanism cannot demold the sand core, resulting in structural fractures in the sand core. The original operation method requires operators to manually place the inserts individually. Manual operation is inconvenient due to the high temperature inside the mold and there are safety hazards. Improper placement of the inserts causes deformation of the sand core size and reduces the yield rate. Summary of the Invention

[0006] In order to improve the yield rate and efficiency while also greatly improving the safety of production, the present application provides an automatic core-pulling mold.

[0007] The automatic core-pulling mold provided in this application adopts the following technical solution:

[0008] An automatic core-pulling mold comprises an upper mold, a lower mold and a movable part, the lower end of the upper mold is provided with an upper forming groove, the upper end of the lower mold is provided with a lower forming groove, a movable groove and a connecting groove, the movable groove is provided on the outer periphery of the lower forming groove, the connecting groove is connected to the lower forming groove and the movable groove, the movable part comprises a movable block, the movable block is hinged to the bottom of the movable groove, the hinge axis of the movable block and the lower mold is vertical, the movable block is fixedly connected to the outer wall of the lower forming groove with a protrusion, and the protrusion passes through the connecting groove and extends into the lower forming groove.

[0009] By adopting the above technical solution, the protrusion extends into the lower molding groove, which facilitates the formation of a groove on the outer wall of the sand core. When the molded sand core needs to be demolded, the movable block moves to move the protrusion away from the sand core, which facilitates demolding and improves the yield rate.

[0010] Preferably, along the width direction of the lower mold, one end of the lower mold is provided with a feed groove, and the other end of the lower mold is provided with a control groove, the feed groove is connected to the lower molding groove, and the control groove is connected to the movable groove.

[0011] By adopting the above technical solution, the feed trough is used to supply mixed sand into the lower molding trough, and the control trough is used for the tool to extend into and operate the movable block to move, thereby facilitating demoulding and improving the yield rate.

[0012] Preferably, it also includes a control block, and the movable part also includes a connecting block and a limit block. The connecting block is fixedly connected to the end of the movable block away from the feed trough, and the outer wall of the connecting block facing away from the axis of the feed trough is provided with an abutment surface. The control block is slidably embedded in the control groove, and the sliding direction of the control block is parallel to the width direction of the lower mold. The limit block is fixedly connected to the end of the control block facing the movable block, and the limit block abuts the abutment surface.

[0013] By adopting the above technical solution, the movement of the control block drives the movement of the limit block, and the limit block abuts the abutment surface to cause the movable block to rotate. When the control block moves toward the movable block, the protrusion moves away from the sand core, which facilitates demoulding and improves the yield rate.

[0014] Preferably, the movable part also includes a positioning column and a torsion spring, the positioning column is fixedly connected to the bottom of the movable groove, the movable block is provided with a hinge interface, the positioning column extends into the hinge interface, the diameter of the positioning column is equal to the diameter of the hinge interface, the outer wall of the positioning column is coaxially provided with an annular groove, the torsion spring is sleeved on the outer periphery of the positioning column, the torsion spring is provided in the annular groove, one end of the torsion spring is fixedly connected to the bottom of the annular groove, and the other end of the torsion spring is fixedly connected to the inner wall of the hinge interface.

[0015] By adopting the above technical solution, the torsion spring enables the protrusion to automatically extend into the feed chute, reducing the probability of reduced yield due to forgetting to control the reset of the movable block.

[0016] Preferably, the lower end of the upper mold is fixedly connected with an auxiliary block, and the outer wall of the auxiliary block is provided with a first guide surface, which is used to abut one end of the control block toward the movable block to keep the control block away from the movable block.

[0017] By adopting the above technical solution, if the operator forgets to push the control block away from the movable block during operation, the finished product will be scrapped. When the upper mold and the lower mold are closed, the auxiliary block pushes the control block away from the movable block, and the torsion spring allows the protrusion to extend into the feed trough, thereby improving the yield rate.

[0018] Preferably, it further includes a mounting plate and a first spring, wherein the mounting plate is arranged on a side of the control block away from the movable block, one end of the first spring is fixedly connected to the mounting plate, and the other end of the first spring is fixedly connected to the control block.

[0019] By adopting the above technical solution, the first spring pushes the mounting plate close to the movable block, so that the protrusion is away from the feed trough, which facilitates material removal and improves the yield rate.

[0020] Preferably, it also includes a locking block, an abutment column, a connecting rod and a second spring, the bottom of the control groove is provided with a locking groove, the bottom of the movable groove is provided with an abutment groove, the lower mold is provided with a channel, two ends of the channel are respectively connected to the locking groove and the abutment groove, the locking block is slidably connected to the groove wall of the locking groove, the abutment column is slidably connected to the groove wall of the abutment groove, the connecting rod passes through the channel, one end of the connecting rod is fixedly connected to the locking block, the other end of the connecting rod is fixedly connected to the abutment column, one end of the second spring is fixedly connected to the upward inner wall of the channel, and the other end of the second spring is fixedly connected to the connecting rod. The lower end of the control block is provided with a limiting groove, and the limiting groove is used for the locking block to be embedded, and the locking block is provided with a second guide surface toward one end of the abutment column, and the second guide surface is used to abut the control block, and the abutment column is used for the auxiliary block to abut.

[0021] By adopting the above technical solution, when it is necessary to make a sand core, the control block is pulled away from the movable block, so that the locking block is embedded in the limit groove, completing the limitation of the control block, which is convenient for molding. At this time, the auxiliary block abuts the abutment column so that the control block is close to the movable block, and the control block abuts the auxiliary block. When the upper mold and the lower mold are separated, the control block abuts the movable block so that the protrusion is away from the sand core, which is convenient for demoulding and improves the yield rate.

[0022] Preferably, there are multiple lower forming grooves, and the multiple lower forming grooves are evenly spaced along the length direction of the lower mold, there are multiple movable parts, and the movable parts are arranged in a one-to-one correspondence with the lower forming grooves, and there are multiple feed troughs, and the feed troughs are arranged in a one-to-one correspondence with the lower forming grooves.

[0023] By adopting the above technical solution, multiple lower forming grooves can produce multiple sand cores at one time, thereby improving production efficiency.

[0024] Preferably, the bottom of the control groove is provided with an anti-slip groove, the length direction of the anti-slip groove is parallel to the width direction of the lower mold, the lower end of the control block is fixedly connected with an anti-slip block, and the anti-slip block is slidably embedded in the anti-slip groove.

[0025] By adopting the above technical solution, the anti-slip block enables the control block to slide stably, reducing the probability of the control block detaching from the lower mold.

[0026] Preferably, it further comprises a ejection rod, the bottom of the lower forming groove is provided with an ejection opening, and the ejection rod is slidably connected to the inner wall of the ejection opening.

[0027] By adopting the above technical solution, the ejector rod pushes the sand core out of the lower mold, making it easier to demould.

[0028] In summary, this application includes at least one of the following beneficial technical effects:

[0029] The convex block extends into the lower forming groove to form a groove on the outer wall of the sand core. When the formed sand core needs to be demoulded, the movable block moves to make the convex block away from the sand core, which facilitates demoulding and improves the yield rate.

[0030] If the operator forgets to push the control block away from the movable block during operation, the finished product will be scrapped. When the upper and lower molds are closed, the auxiliary block pushes the control block away from the movable block, and the torsion spring allows the protrusion to extend into the feed chute, improving the yield rate.

[0031] When it is necessary to make a sand core, pull the control block away from the movable block so that the locking block is embedded in the limit groove, completing the limitation of the control block, which is convenient for molding. At this time, the auxiliary block abuts the abutment column so that the control block is close to the movable block, and the control block abuts the auxiliary block. When the upper mold and the lower mold are separated, the control block abuts the movable block so that the protrusion is away from the sand core, which is convenient for demoulding and improves the yield rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the overall structure of an automatic core-pulling mold.

[0033] Figure 2 It is a schematic diagram of the overall structure of the lower mold, movable parts, control parts, and auxiliary parts.

[0034] Figure 3 It is a schematic diagram of the overall structure of the upper mold.

[0035] Figure 4 It is an exploded view of the locating column, movable block, torsion spring and connecting block.

[0036] Figure 5 It is a cross-sectional view of an automatic core-pulling mold.

[0037] Figure 6 yes Figure 5 Enlarged view of point A in the middle.

[0038] Explanation of reference numerals: 1, upper die; 11, upper forming groove; 12, auxiliary block; 121, first guide surface; 2, lower die; 21, lower forming groove; 211, ejection port; 22, movable groove; 221, abutment groove; 23, communication groove; 24, feed groove; 25, control groove; 251, anti-slip groove; 252, locking groove; 26, passage; 27, placement port; 3, movable part; 31, positioning column; 311, annular groove; 32, movable block; 321, hinge port; 322, protrusion; 33 , torsion spring; 34, connecting block; 341, abutting surface; 35, limiting block; 351, arc surface; 4, control member; 41, control block; 411, anti-drop block; 412, limiting groove; 42, mounting plate; 43, first spring; 44, connecting column; 45, push rod; 46, handle; 5, auxiliary member; 51, locking block; 511, second guide surface; 52, abutting column; 521, arc surface; 53, connecting rod; 54, second spring; 6, ejecting member; 61, ejecting rod; 62, ejecting plate. DETAILED DESCRIPTION

[0039] The following is combined with Figure 1-6 This application is described in further detail.

[0040] The embodiment of the present application discloses an automatic core-pulling mold. Figure 1 and Figure 2 An automatic core-pulling mold includes an upper mold 1, a lower mold 2, a movable part 3, a control part 4, an auxiliary part 5 and a ejector part 6.

[0041] Reference Figure 2 and Figure 3 The lower end of the upper mold 1 is provided with an upper molding groove 11, and the upper end of the lower mold 2 is provided with a lower molding groove 21, a movable groove 22, and a connecting groove 23. The movable groove 22 is provided on the outer periphery of the lower molding groove 21. The connecting groove 23 is connected to the lower molding groove 21 and the movable groove 22 at both ends. The distance between the two opposing groove walls of the connecting groove 23 increases as the distance away from the lower molding groove 21 increases. Along the width direction of the lower mold 2, a feed groove 24 is provided at one end of the lower mold 2, and a control groove 25 is provided at the other end of the lower mold 2. The feed groove 24 is connected to the lower molding groove 21, and the control groove 25 is connected to the movable groove 22. There are three lower molding grooves 21, which are evenly spaced along the length direction of the lower mold 2. There are three feed grooves 24, which are arranged one-to-one with the lower molding grooves 21. There are six connecting grooves 23, with each lower molding groove 21 corresponding to two connecting grooves 23, and two connecting grooves 23 are provided on either side of the feed groove 24.

[0042] Reference Figure 2 and Figure 4The movable member 3 includes a positioning post 31, a movable block 32, a torsion spring 33, a connecting block 34, and a limiting block 35. The positioning post 31 is fixedly connected to the bottom of the movable groove 22, the axis of the positioning post 31 is vertical, the movable block 32 is provided with a hinge port 321, the positioning post 31 extends into the hinge port 321, the diameter of the positioning post 31 is equal to the diameter of the hinge port 321, the outer wall of the positioning post 31 is coaxially provided with an annular groove 311, the torsion spring 33 is sleeved on the outer circumference of the positioning post 31, and is arranged in the annular groove 311. One end of the torsion spring 33 is fixedly connected to the bottom of the annular groove 311, and the other end of the torsion spring 33 is fixedly connected to the inner wall of the hinge port 321. The movable block 32 is fixedly connected to the outer wall of the lower molding groove 21 with a protrusion 322. The protrusion 322 extends through the connecting groove 23 into the lower molding groove 21. When the protrusion 322 extends into the lower molding groove 21, the outer wall of the protrusion 322 abuts the groove wall of the connecting groove 23. There are six movable parts 3, and the six movable parts 3 are arranged in a one-to-one correspondence with the connecting grooves 23. Each lower molding groove 21 corresponds to two movable parts 3.

[0043] Reference Figure 2 The control member 4 includes a control block 41, a mounting plate 42, a first spring 43, a connecting column 44, a push rod 45 and a handle 46. The control block 41 is slidably embedded in the control groove 25, and the sliding direction of the control block 41 is parallel to the width direction of the lower mold 2. The bottom of the control groove 25 is provided with an anti-slip groove 251, and the length direction of the anti-slip groove 251 is parallel to the width direction of the lower mold 2. There are two anti-slip grooves 251, and the two anti-slip grooves 251 are respectively close to the two ends of the length direction of the control block 41. The lower end of the control block 41 is fixedly connected to an anti-slip block 411, and the anti-slip block 411 is slidably embedded in the anti-slip groove 251. The anti-slip groove 251 is set as a dovetail groove, and the anti-slip block 411 is set as a dovetail block.

[0044] The mounting plate 42 is arranged on the side of the control block 41 away from the movable block 32. The mounting plate 42 is fixedly connected to the bottom of the anti-slip groove 251. One end of the first spring 43 is fixedly connected to the mounting plate 42. The other end of the first spring 43 is fixedly connected to the control block 41. There are two mounting plates 42. The mounting plates 42 are arranged one-to-one corresponding to the anti-slip groove 251. The first spring 43 makes the control block 41 close to the movable block 32.

[0045] Reference Figure 2 One end of the connecting post 44 is fixedly connected to the end of the control block 41 away from the feed chute 24, and the other end of the connecting post 44 is fixedly connected to the push rod 45. The length direction of the push rod 45 is parallel to the length direction of the control block 41. There are two connecting posts 44, and both connecting posts 44 are located between the two anti-slip grooves 251. A handle 46 is fixedly connected to the end of the push rod 45 away from the control block 41, and the handle 46 is used for the operator to hold.

[0046] The connecting block 34 is fixedly connected to the end of the movable block 32 away from the feed chute 24. The outer wall of the connecting block 34 facing away from the axis of the feed chute 24 is provided with an abutment surface 341, which is configured as an inclined surface. The limiting block 35 is fixedly connected to the end of the control block 41 facing the movable block 32. The limiting block 35 and the connecting block 34 are provided in a one-to-one correspondence. The limiting block 35 is provided on the side of the connecting block 34 away from the axis of the feed chute 24. The end of the limiting block 35 facing away from the control block 41 is configured as an arcuate surface 351, which abuts the abutment surface 341. When the control block 41 approaches the movable block 32, the limiting block 35 abuts the connecting block 34, causing the two connecting blocks 34 corresponding to one lower forming groove 21 to approach each other and the protrusion 322 to move away from the lower forming groove 21.

[0047] Reference Figure 5 and Figure 6 The auxiliary component 5 includes a locking block 51, an abutting column 52, a connecting rod 53, and a second spring 54. A locking groove 252 is provided at the bottom of the control groove 25, an abutting groove 221 is provided at the bottom of the movable groove 22, and a channel 26 is provided at the lower mold 2. The two ends of the channel 26 are respectively connected to the locking groove 252 and the abutting groove 221. The locking block 51 is slidably connected to the groove wall of the locking groove 252, and the abutting column 52 is slidably connected to the groove wall of the abutting groove 221. The connecting rod 53 passes through the channel 26. One end of the connecting rod 53 is fixedly connected to the locking block 51, and the other end of the connecting rod 53 is fixedly connected to the abutting column 52. One end of the second spring 54 is fixedly connected to the upward inner wall of the channel 26, and the other end of the second spring 54 is fixedly connected to the connecting rod 53.

[0048] Reference Figure 2 and Figure 6 The lower end of the upper mold 1 is fixedly connected to an auxiliary block 12, which is located directly above the abutment groove 221. The outer wall of the auxiliary block 12 facing away from the feed groove 24 is provided with a first guide surface 121. The first guide surface 121 is used to abut the end of the control block 41 facing the movable block 32, so that the control block 41 is away from the movable block 32. The lower end of the control block 41 is provided with a limiting groove 412, which is used for the locking block 51 to be inserted. The end of the locking block 51 facing the abutment column 52 is provided with a second guide surface 511, which is used to abut the control block 41. The upper end of the abutment column 52 is provided with an arcuate surface 521, which is used for the auxiliary block 12 to abut.

[0049] Reference Figure 1 and Figure 2 The ejection member 6 includes an ejection rod 61 and an ejection plate 62. A ejection port 211 is provided at the bottom of the lower forming groove 21. The ejection rod 61 is slidably connected to the inner wall of the ejection port 211. There are three ejection rods 61, and the ejection rods 61 are arranged one-to-one corresponding to the lower forming groove 21. The lower mold 2 is provided with a placement port 27. The ejection plate 62 is slidably connected to the inner wall of the placement port 27. The lower end of the ejection rod 61 is fixedly connected to the ejection plate 62.

[0050] The implementation principle of an automatic core-pulling mold in the embodiment of the present application is as follows: when producing sand cores, the handle 46 is held to pull the control block 41, so that the control block 41 is away from the movable block 32, and the locking block 51 extends into the limiting groove 412 to limit the position of the control block 41. The first spring 43 is compressed, and the torsion spring 33 causes the movable block 32 to rotate, and the protrusion 322 is embedded in the connecting groove 23. If the control block 41 is forgotten to be away from the movable block 32, during the process of closing the upper mold 1 and the lower mold 2, the first guide surface 121 of the auxiliary block 12 abuts against the control block 41, so that the control block 41 is away from the movable block 32. After the upper mold 1 and the lower mold 2 are closed, the auxiliary block 12 abuts against the abutting column 52, causing the second spring 54 to be compressed, the locking block 51 to move away from the limiting groove 412, and the first spring 43 pushes the control block 41 to abut against the auxiliary block 12. The mixed sand enters the upper molding groove 11 and the lower molding groove 21 from the feeding groove 24 to form a sand core. The upper mold 1 and the lower mold 2 are separated. The auxiliary block 12 cannot limit the control block 41. The control block 41 abuts against the abutting surface 341, causing the movable block 32 to rotate, the protrusion 322 to move away from the sand core, the ejector plate 62 moves upward, and the ejector rod 61 ejects the material from the mold, thereby improving the demolding efficiency and the yield rate.

[0051] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. An automatic core-pulling mold, characterized by: The invention comprises an upper die (1), a lower die (2) and a movable part (3), wherein the lower end of the upper die (1) is provided with an upper forming groove (11), the upper end of the lower die (2) is provided with a lower forming groove (21), a movable groove (22) and a connecting groove (23), the movable groove (22) is provided on the outer periphery of the lower forming groove (21), the connecting groove (23) is connected to the lower forming groove (21) and the movable groove (22), the movable part (3) comprises a movable block (32), the movable block (32) is hinged to the groove bottom of the movable groove (22), the hinge axis of the movable block (32) and the lower die (2) is vertical, the movable block (32) is fixedly connected to the outer wall of the lower forming groove (21) with a protrusion (322), and the protrusion (322) passes through the connecting groove (23) and extends into the lower forming groove (21); Along the width direction of the lower mold (2), a feed groove (24) is provided at one end of the lower mold (2), and a control groove (25) is provided at the other end of the lower mold (2), the feed groove (24) is connected to the lower molding groove (21), and the control groove (25) is connected to the movable groove (22); The movable member (3) further comprises a control block (41), and the movable member (3) further comprises a connecting block (34) and a limiting block (35), wherein the connecting block (34) is fixedly connected to an end of the movable block (32) away from the feed trough (24), and an outer wall of the connecting block (34) away from the axis of the feed trough (24) is provided with an abutting surface (341), and the control block (41) is slidably embedded in the control trough (25), and the sliding direction of the control block (41) is parallel to the width direction of the lower mold (2), and the limiting block (35) is fixedly connected to an end of the control block (41) facing the movable block (32), and the limiting block (35) abuts against the abutting surface (341); The movable member (3) further comprises a positioning column (31) and a torsion spring (33), wherein the positioning column (31) is fixedly connected to the bottom of the movable groove (22), the movable block (32) is provided with a hinge interface (321), the positioning column (31) extends into the hinge interface (321), the diameter of the positioning column (31) is equal to the diameter of the hinge interface (321), the outer wall of the positioning column (31) is coaxially provided with an annular groove (311), the torsion spring (33) is sleeved on the outer periphery of the positioning column (31), the torsion spring (33) is provided in the annular groove (311), one end of the torsion spring (33) is fixedly connected to the bottom of the annular groove (311), and the other end of the torsion spring (33) is fixedly connected to the inner wall of the hinge interface (321); The lower end of the upper mold (1) is fixedly connected to an auxiliary block (12), and the outer wall of the auxiliary block (12) is provided with a first guide surface (121), and the first guide surface (121) is used to abut against one end of the control block (41) toward the movable block (32), so that the control block (41) is away from the movable block (32); It also includes a mounting plate (42) and a first spring (43), wherein the mounting plate (42) is provided on a side of the control block (41) away from the movable block (32), one end of the first spring (43) is fixedly connected to the mounting plate (42), and the other end of the first spring (43) is fixedly connected to the control block (41); The mold (2) further comprises a locking block (51), an abutting column (52), a connecting rod (53) and a second spring (54); the bottom of the control groove (25) is provided with a locking groove (252); the bottom of the movable groove (22) is provided with an abutting groove (221); the lower mold (2) is provided with a channel (26); the two ends of the channel (26) are respectively connected to the locking groove (252) and the abutting groove (221); the locking block (51) is slidably connected to the groove wall of the locking groove (252); the abutting column (52) is slidably connected to the groove wall of the abutting groove (221); the connecting rod (53) passes through the channel (26); one end of the connecting rod (53) is fixedly connected to the locking groove (252); The locking block (51) is fixedly connected to the abutting column (52) at the other end of the connecting rod (53). One end of the second spring (54) is fixedly connected to the upward inner wall of the channel (26). The other end of the second spring (54) is fixedly connected to the connecting rod (53). The lower end of the control block (41) is provided with a limiting groove (412). The limiting groove (412) is used for the locking block (51) to be embedded. The end of the locking block (51) facing the abutting column (52) is provided with a second guide surface (511). The second guide surface (511) is used to abut the control block (41). The abutting column (52) is used for abutting the auxiliary block (12).

2. The automatic core-pulling mold according to claim 1, characterized in that: There are a plurality of lower forming grooves (21), and the plurality of lower forming grooves (21) are evenly spaced along the length direction of the lower mold (2); there are a plurality of movable parts (3), and the movable parts (3) are arranged in a one-to-one correspondence with the lower forming grooves (21); there are a plurality of feed grooves (24), and the feed grooves (24) are arranged in a one-to-one correspondence with the lower forming grooves (21).

3. The automatic core-pulling mold according to claim 1, characterized in that: The bottom of the control groove (25) is provided with an anti-slip groove (251), the length direction of the anti-slip groove (251) is parallel to the width direction of the lower mold (2), and the lower end of the control block (41) is fixedly connected with an anti-slip block (411), and the anti-slip block (411) is slidably embedded in the anti-slip groove (251).

4. The automatic core-pulling mold according to claim 1, characterized in that: It also includes a ejector rod (61), a ejector opening (211) is provided at the bottom of the lower forming groove (21), and the ejector rod (61) is slidably connected to the inner wall of the ejector opening (211).

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