Die-casting inclined core-pulling locking structure and die-casting mold

Abstract

The present application provides a die-casting inclined core-pulling locking structure and a die-casting mold. The above-mentioned die-casting inclined core-pulling locking structure includes a moving die assembly, an inclined core-pulling mechanism and a locking mechanism. The locking mechanism includes a sliding assembly, a connecting rod assembly, a backstop assembly and a pulling assembly. The sliding member of the sliding assembly slides within the moving die assembly. The connecting rod assembly includes a first connecting rod, a second connecting rod and a third connecting rod. The first end of the first connecting rod is rotatably connected to the sliding assembly. The first end of the second connecting rod is rotatably connected to the cylinder block of the inclined core-pulling mechanism. The first end of the third connecting rod is rotatably connected to the second end of the first connecting rod and the second end of the second connecting rod respectively. The second end of the third connecting rod is rotatably connected to the core-pulling rod of the inclined core-pulling mechanism. The second connecting rod and the third connecting rod are parallel to each other after mold closing and form a locking rod group. The locking rod group is parallel to the axial direction of the core-pulling rod. The braking member of the sliding assembly is fixed between the backstop assembly and the moving die assembly after mold closing to prevent the inclined core-pulling mechanism from retracting and improve the structural compactness at the same time.

Description

Technical Field

[0001] The present invention relates to the technical field of die-casting molds, and particularly to a die-casting inclined core-pulling locking structure and a die-casting mold. Background Art

[0002] With the rise of automotive lightweighting and integrated die-casting, die-cast products will become more complex and have stricter dimensional requirements. For complex castings, an inclined core-pulling structure often needs to be arranged in the mold. Due to the influence of the demolding angle, etc., a traditional shovel base locking mechanism cannot be set for the inclined core-pulling structure. The inclined core-pulling retreats due to the normal expansion force during die-casting, resulting in out-of-tolerance dimensions of the casting.

[0003] In order to prevent the inclined core-pulling from retreating due to the normal expansion force, the traditional solution is to replace the cylinder with a larger one. However, this will cause the mold to become larger, requiring a larger die-casting machine to match the mold, resulting in an increase in the volume of the mold and the die-casting machine, that is, reducing the structural compactness of both the mold and the die-casting machine. Summary of the Invention

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a die-casting inclined core-pulling locking structure and a die-casting mold that can prevent the inclined core-pulling mechanism from retreating and at the same time improve the structural compactness of the mold and the die-casting machine.

[0005] The purpose of the present invention is achieved through the following technical solutions:

[0006] A die-casting inclined core-pulling locking structure, comprising:

[0007] A moving mold assembly, provided with a communicating chute and a braking groove;

[0008] An inclined core-pulling mechanism, comprising an oil cylinder and a core-pulling rod. The cylinder body of the oil cylinder is installed on the moving mold assembly, and the core-pulling rod is fixedly connected to the piston rod of the oil cylinder;

[0009] A locking mechanism, comprising a sliding assembly, a connecting rod assembly, a backstop assembly, and a pulling assembly. Among them, the sliding assembly includes a sliding member and a braking member. The sliding member is slidably connected in the chute, the braking member is convexly connected to the sliding member, and the braking member is also located in the braking groove; the connecting rod assembly includes a first connecting rod, a second connecting rod, and a third connecting rod. The first end of the first connecting rod is rotatably connected to the sliding member, the first end of the second connecting rod is rotatably connected to the cylinder body, the first end of the third connecting rod is rotatably connected to the second end of the first connecting rod and the second end of the second connecting rod respectively, and the second end of the third connecting rod is rotatably connected to the core-pulling rod; the backstop assembly is elastically connected to the moving mold assembly, the pulling assembly is installed on the moving mold assembly, and the power output end of the pulling assembly is fixedly connected to the braking member;

[0010] Wherein, after mold clamping is completed, the second connecting rod and the third connecting rod are parallel to each other and form a locking rod group. The locking rod group is parallel to the axial direction of the core-pulling rod. The first end of the anti-retreat assembly is used to abut against the fixed mold structure during mold clamping, so as to push the second end of the anti-retreat assembly to abut against the braking member after mold clamping is completed. After mold clamping is completed, the braking member also abuts against the groove wall of the braking groove, so that the braking member is fixed between the second end of the anti-retreat assembly and the groove wall of the braking groove after mold clamping is completed. The power output end of the pulling assembly is used to pull the sliding member during mold opening, so that the second connecting rod rotates towards the sliding member.

[0011] In one embodiment, the moving mold assembly is provided with a moving hole, and the moving hole extends to a side surface of the moving mold assembly adjacent to the fixed mold structure, and the moving hole also extends to the braking groove;

[0012] The anti-retreat assembly includes an anti-retreat rod and a return spring. The anti-retreat rod is inserted through the moving hole, and the return spring abuts against the anti-retreat rod and the moving mold assembly respectively. The first end of the anti-retreat rod is used to abut against the fixed mold structure during mold clamping, so as to push the second end of the anti-retreat rod to abut against the braking member during mold clamping. The return spring pushes the anti-retreat rod to separate from the braking member during mold opening.

[0013] In one embodiment, a braking inclined surface is provided on a side of the braking member facing away from the first connecting rod, and a retreat-preventing inclined surface is formed at the second end of the anti-retreat rod. The retreat-preventing inclined surface fits with the braking inclined surface during mold clamping.

[0014] In one embodiment, a limiting portion is convexly provided on the outer side of the anti-retreat rod. The moving mold assembly is further provided with a receiving groove. The moving hole penetrates through the receiving groove. The return spring is arranged in the receiving groove and sleeved on the anti-retreat rod. Two ends of the return spring abut against the limiting portion and the groove wall of the receiving groove respectively.

[0015] In one embodiment, the pulling assembly includes a mounting seat, a traction rod and a traction spring. The mounting seat is fixedly connected to the moving mold assembly. The traction rod is movably inserted through the mounting seat. The traction rod is also fixedly connected to the braking member. The traction spring is connected to the mounting seat and the traction rod respectively. The traction spring pushes the traction rod during mold opening, so that the traction rod pulls the braking member.

[0016] In one embodiment, the traction spring is sleeved on the traction rod.

[0017] In one embodiment, a contact portion protrudes from the first end of the towing rod, the second end of the towing rod is fixedly connected to the braking member, and the towing spring abuts against the mounting seat and the contact portion respectively.

[0018] In one embodiment, the first end of the first connecting rod is hinged to the sliding member, the first end of the second connecting rod is hinged to the cylinder block, the first end of the third connecting rod is hinged to the second end of the first connecting rod and the second end of the second connecting rod respectively, and the second end of the third connecting rod is hinged to the core-pulling rod.

[0019] In one embodiment, the die-casting inclined core-pulling locking structure includes two connecting pins. The first end of the first connecting rod is hinged to the sliding member through one of the connecting pins, and the first end of the third connecting rod is hinged to the second end of the first connecting rod and the second end of the second connecting rod respectively through the other connecting pin.

[0020] A die-casting mold includes the die-casting inclined core-pulling locking structure described in any one of the above embodiments. The die-casting mold further includes a fixed mold structure. When the mold is closed, the fixed mold structure abuts against the first end of the anti-retreat assembly to push the second end of the anti-retreat assembly to abut against the braking member when the mold is closed.

[0021] Compared with the prior art, the present invention has at least the following advantages:

[0022] 1. When the die-casting mold is in the closed state, the second connecting rod and the third connecting rod are parallel to each other and form a locking rod group. The locking rod group is parallel to the axial direction of the core-pulling rod. The fixed mold structure abuts against the first end of the anti-retreat assembly, so that the second end of the anti-retreat assembly abuts against the braking member. In addition, the braking member also abuts against the groove wall of the braking groove, so that the braking member is fixed between the second end of the anti-retreat assembly and the groove wall of the braking groove, thereby keeping the positions of the sliding assembly and the connecting rod assembly fixed, and making the fixed mold structure, the anti-retreat assembly, the first connecting rod, the locking rod group and the core-pulling rod fixedly connected in sequence in the closed state. When the core-pulling rod is subjected to a normal bulging force, the normal bulging force will tend to push the core-pulling rod to reset. At this time, since the fixed mold structure, the anti-retreat assembly, the first connecting rod, the locking rod group and the core-pulling rod are fixedly connected in sequence in the closed state, the normal bulging force is conducted to the fixed mold structure through the locking rod group, the first connecting rod and the anti-retreat assembly in sequence, that is, the normal bulging force is conducted to the opening and closing die direction, reducing the normal bulging force received by the core-pulling rod, avoiding the core-pulling rod from moving in the reset direction, that is, avoiding the core-pulling rod and the piston rod from retreating, ensuring that the core-pulling rod remains in the forming position during the forming process, and thus avoiding the problem of dimensional tolerance of the casting.

[0023] 2. Since the die-casting inclined core-pulling locking structure avoids the problem of the core-pulling rod retreating, it is not necessary to replace a larger oil cylinder, making the structure of the mold and the die-casting machine more compact. Description of the Drawings

[0024] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0025] Figure 1 It is a schematic structural diagram of a die-casting mold for an embodiment;

[0026] Figure 2 For Figure 1 It is a schematic partial structural diagram of the die-casting mold shown;

[0027] Figure 3 For Figure 1 It is another schematic partial structural diagram of the die-casting mold shown;

[0028] Figure 4 For Figure 1 It is a schematic structural diagram of the die-casting mold shown in another state;

[0029] Figure 5 For Figure 4 It is a schematic partial structural diagram of the die-casting mold shown;

[0030] Figure 6 For Figure 5 It is another schematic partial structural diagram of the die-casting mold shown;

[0031] Figure 7 It is a schematic partial structure of a die-casting mold for another embodiment. Specific embodiments

[0032] To facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. The preferred embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0033] It should be noted that when an element is referred to as "fixed to" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this invention belongs. The terms used in the description of the present invention herein are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0035] As Figure 1 shown, a die-casting mold 10 of an embodiment includes a die-casting inclined core-pulling locking structure 10a and a fixed mold structure 10b.

[0036] As Figures 1 to 3 shown, in one of the embodiments, the die-casting inclined core-pulling locking structure 10a includes a moving mold assembly 100, an inclined core-pulling mechanism 200, and a locking mechanism 300. Among them, the moving mold assembly 100 is provided with a communicating chute 101 and a braking groove 102. The inclined core-pulling mechanism 200 includes an oil cylinder 210 and a core-pulling rod 220. The cylinder block 211 of the oil cylinder 210 is installed on the moving mold assembly 100, the core-pulling rod 220 is fixedly connected to the piston rod 211 of the oil cylinder 210, and the core-pulling rod 220 is coaxially arranged with the piston rod 211. The locking mechanism 300 includes a sliding assembly 310, a connecting rod assembly 320, a backstop assembly 330, and a pulling assembly 340. Among them, the sliding assembly 310 includes a sliding member 311 and a braking member 312. The sliding member 311 is slidably connected in the chute 101, the braking member 312 protrudes and is connected to the sliding member 311, and the braking member 312 is also located in the braking groove 102.

[0037] As Figure 2 and Figure 3 shown, further, the connecting rod assembly 320 includes a first connecting rod 321, a second connecting rod 322, and a third connecting rod 323. The first end of the first connecting rod 321 is rotatably connected to the sliding member 311, the first end of the second connecting rod 322 is rotatably connected to the cylinder block 211, the first end of the third connecting rod 323 is rotatably connected to the second end of the first connecting rod 321 and the second end of the second connecting rod 322 respectively, and the second end of the third connecting rod 323 is rotatably connected to the core-pulling rod 220. The backstop assembly 330 is elastically connected to the moving mold assembly 100, the pulling assembly 340 is installed on the moving mold assembly 100, the power output end of the pulling assembly 340 is fixedly connected to the braking member 312, and the backstop assembly 330 and the pulling assembly 340 are located on the same side of the connecting rod assembly 320, that is, the backstop assembly 330 and the pulling assembly 340 are located on the same side of the inclined core-pulling mechanism 200.

[0038] As Figures 4 to 6As shown, further, after mold clamping is completed, the second connecting rod 322 and the third connecting rod 323 are parallel to each other and form a locking rod group 320a. The locking rod group 320a is parallel to the axial direction of the core-pulling rod 220. That is, the included angle between the second connecting rod 322 and the third connecting rod 323 which is at a right angle becomes 180° after mold clamping, and both the second connecting rod 322 and the third connecting rod 323 are parallel to the core-pulling rod 220. The first end of the anti-retreat assembly 330 is used to abut against the fixed mold structure 10b during mold clamping, that is, the fixed mold structure 10b abuts against the first end of the anti-retreat assembly 330 during mold clamping to push the second end of the anti-retreat assembly 330 to abut against the braking member 312 after mold clamping is completed. The braking member 312 also abuts against the groove wall of the braking groove 102 after mold clamping is completed, so that the braking member 312 is clamped between the second end of the anti-retreat assembly 330 and the groove wall of the braking groove 102 and is fixed between the second end of the anti-retreat assembly 330 and the groove wall of the braking groove 102.

[0039] As Figure 5 and Figure 6 shown, the power output end of the pulling assembly 340 is used to pull the braking member 312 during mold opening, so that the second connecting rod 322 and the third connecting rod 323 rotate in the direction of the sliding member 311. In this embodiment, the anti-retreat assembly 330 is separated from the braking member 312 during mold opening, so that the power output end of the pulling assembly 340 can pull the sliding member 311 to slide.

[0040] As Figure 5 and Figure 6 shown, before mold clamping, the oil cylinder 210 drives the piston rod 211 to extend, so that the core-pulling rod 220 moves to the molding position. During the extension process of the piston rod 211, the core-pulling rod 220 drives the connecting rod assembly 320 to rotate, causing the sliding assembly 310 to slide in the direction of the connecting rod assembly 320. At the same time, the braking member 312 drives the power output end of the pulling assembly 340 to move. After the core-pulling rod 220 moves to the molding position, the braking member 312 abuts against the groove wall of the braking groove 102, and the included angle between the second connecting rod 322 and the third connecting rod 323 is 180°.

[0041] As Figures 4 to 6 shown, during mold clamping, that is, during the process of mold clamping, the fixed mold structure 10b first abuts against the first end of the anti-retreat assembly 330 to push the second end of the anti-retreat assembly 330 to move in the direction of the braking member 312. After mold clamping is completed, the fixed mold structure 10b abuts against the first end of the anti-retreat assembly 330 and the moving mold assembly 100 respectively. The anti-retreat assembly 330 stops moving and abuts against the braking member 312, so that the braking member 312 is fixed between the second end of the anti-retreat assembly 330 and the groove wall of the braking groove 102.

[0042] As Figures 1 to 3As shown, during mold opening, i.e., during the separation process of the fixed mold structure 10b and the moving mold assembly 100, the anti-retreat component 330 separates from the braking member 312 and gradually resets, so that the anti-retreat component 330 is outside the sliding path of the sliding member 311. After mold opening is completed, the oil cylinder 210 drives the core-pulling rod 220 to reset, so that the core-pulling rod 220 separates from the casting 10c. During the reset process of the core-pulling rod 220, the power output end of the pulling component 340 pulls the sliding component 310 to slide, so that the second connecting rod 322 and the third connecting rod 323 both rotate in the direction of the sliding component 310, avoiding the tendency of the second connecting rod 322 and the third connecting rod 323 to rotate away from the sliding member 311 when the core-pulling rod 220 resets. Furthermore, it is avoided that the connecting rod assembly 320 drives the sliding component 310 to slide in the direction of the core-pulling rod 220. Since the braking member 312 of the sliding component 310 abuts against the groove wall of the braking groove 102, it is avoided that the braking member 312 is stuck in the braking groove 102, and thus the reset smoothness of the core-pulling rod 220 is relatively high.

[0043] For the above die-casting mold 10 and the die-casting inclined core-pulling and locking structure 10a, when the die-casting mold 10 is in the closed mold state, the second connecting rod 322 and the third connecting rod 323 are parallel to each other and form a locking rod group 320a. The locking rod group 320a is parallel to the axial direction of the core-pulling rod 220. The fixed mold structure 10b abuts against the first end of the anti-retreat component 330, so that the second end of the anti-retreat component 330 abuts against the braking member 312. Coupled with the braking member 312 also abutting against the groove wall of the braking groove 102, the braking member 312 is fixed between the second end of the anti-retreat component 330 and the groove wall of the braking groove 102. Furthermore, the positions of the sliding component 310 and the connecting rod assembly 320 are both kept fixed, and the fixed mold structure 10b, the anti-retreat component 330, the first connecting rod 321, the locking rod group 320a and the core-pulling rod 220 are fixedly connected in sequence in the closed mold state; when the core-pulling rod 220 is subjected to a normal bulging force, the normal bulging force will tend to push the core-pulling rod 220 to reset. At this time, since the fixed mold structure 10b, the anti-retreat component 330, the first connecting rod 321, the locking rod group 320a and the core-pulling rod 220 are fixedly connected in sequence in the closed mold state, the normal bulging force is sequentially transmitted to the fixed mold structure 10b through the locking rod group 320a, the first connecting rod 321 and the anti-retreat component 330, that is, the normal bulging force is transmitted to the mold opening and closing direction, reducing the normal bulging force received by the core-pulling rod 220, avoiding the core-pulling rod 220 from moving in the reset direction, that is, avoiding the retraction of the core-pulling rod 220 and the piston rod 211, ensuring that the core-pulling rod 220 remains in the forming position during the forming process, and further avoiding the problem of dimensional tolerance of the casting 10c, and there is no need to replace a larger oil cylinder 210, making the structure of the mold and the die-casting machine relatively compact.

[0044] As Figure 5As shown, in one embodiment, the moving die assembly 100 is provided with a movable hole 103. The movable hole 103 extends to one side of the moving die assembly 100 adjacent to the fixed die structure 10b, and the movable hole 103 also extends to the braking groove 102. The anti-retreat assembly 330 includes an anti-retreat rod 331 and a return spring 332. The anti-retreat rod 331 is inserted through the movable hole 103, and the return spring 332 abuts against the anti-retreat rod 331 and the moving die assembly 100 respectively. The first end of the anti-retreat rod 331 is used to abut against the fixed die structure 10b during mold closing, so as to push the second end of the anti-retreat rod 331 to abut against the braking member 312 during mold closing. The return spring 332 pushes the anti-retreat rod 331 to separate from the braking member 312 during mold opening, so that the anti-retreat rod 331 automatically resets, improving the automation degree of the anti-retreat assembly 330.

[0045] As Figure 6 shown, in one embodiment, a braking slope 3121 is provided on the side of the braking member 312 facing away from the first connecting rod 321, and a retreat prevention slope 3311 is formed at the second end of the anti-retreat rod 331. The retreat prevention slope 3311 fits with the braking slope 3121 during mold closing. In this embodiment, since both the braking slope 3121 and the retreat prevention slope 3311 are inclined, the force on the braking member 312 in the mold opening and closing direction is greater, reducing the torque on the anti-retreat rod 331, inhibiting the deformation of the anti-retreat rod 331, and improving the locking effect of the anti-retreat rod 331.

[0046] As Figure 5 shown, in one embodiment, a limiting portion 331a is convexly provided on the outer side of the anti-retreat rod 331. The moving die assembly 100 is further provided with a receiving groove 104. The movable hole 103 penetrates through the receiving groove 104. The return spring 332 is arranged in the receiving groove 104 and sleeved on the anti-retreat rod 331. The two ends of the return spring 332 abut against the limiting portion 331a and the groove wall of the receiving groove 104 respectively, so that the anti-retreat rod 331 is elastically connected to the moving die assembly 100.

[0047] As Figure 5 shown, in one embodiment, the pulling assembly 340 includes a mounting seat 341, a traction rod 342 and a traction spring 343. The mounting seat 341 is fixedly connected to the moving die assembly 100. The traction rod 342 is movably inserted through the mounting seat 341. The traction rod 342 is also fixedly connected to the braking member 312. The traction spring 343 is connected to the mounting seat 341 and the traction rod 342 respectively. The traction spring 343 pushes the traction rod 342 during mold opening, so as to pull the braking member 312 by the traction rod 342.

[0048] As Figure 5As shown, in this embodiment, the drawbar 342 is elastically connected to the mounting seat 341 through a draw spring 343. The first end of the draw spring 343 always abuts against the first end of the drawbar 342, and the second end of the draw spring 343 always abuts against the mounting seat 341, so that the draw spring 343 always pushes the drawbar 342, enabling the drawbar 342 to always have a force to pull the slider 311. When the core-pulling rod 220 moves towards the molding position, the braking member 312 drives the drawbar 342 to slide against the pulling force of the draw spring 343, causing the draw spring 343 to compress. When the core-pulling rod 220 moves away from the molding position, the second link 322 and the third link 323 will rotate. Due to the pulling force of the drawbar 342, the second link 322 and the third link 323 will rotate towards the slider 311.

[0049] As Figure 5 shown, in one of the embodiments, the draw spring 343 is sleeved on the drawbar 342 to limit the position of the draw spring 343.

[0050] As Figure 5 shown, in one of the embodiments, the first end of the drawbar 342 is convexly provided with an abutting portion 3421. The second end of the drawbar 342 is fixedly connected to the braking member 312. The draw spring 343 abuts against the mounting seat 341 and the abutting portion 3421 respectively, so that the drawbar 342 is elastically connected to the mounting seat 341 through the draw spring 343.

[0051] As Figure 6 shown, in one of the embodiments, the first end of the first link 321 is hinged to the slider 311, the first end of the second link 322 is hinged to the cylinder block 211, the first end of the third link 323 is hinged to the second end of the first link 321 and the second end of the second link 322 respectively, and the second end of the third link 323 is hinged to the core-pulling rod 220.

[0052] As Figure 6 shown, in one of the embodiments, the die-casting inclined core-pulling locking structure 10a includes two connecting pins. The first end of the first link 321 is hinged to the slider 311 through one of the connecting pins, and the first end of the third link 323 is hinged to the second end of the first link 321 and the second end of the second link 322 respectively through the other connecting pin.

[0053] As Figure 5 shown, in one of the embodiments, an avoidance space 105 is formed in the moving die assembly 100. The avoidance space 105 is communicated with the sliding groove 101. The link assembly 320 moves in the avoidance space 105 to prevent the link assembly 320 from interfering with the moving die assembly 100.

[0054] It can be understood that if there is no gap between the inner wall of the movable hole 103 and the anti-retreat rod 331, the anti-retreat rod 331 can be prevented from moving circumferentially after the mold is closed, thereby improving the locking effect of the anti-retreat rod 331. However, after a long time, the inner wall of the movable hole 103 will inevitably be worn, which will result in a relatively high or low service life of the movable mold assembly 100.

[0055] Therefore, in order to improve the locking effect of the anti-retreat rod 331 and at the same time improve the service life of the movable mold assembly 100, as Figure 7 shown, in one embodiment, the anti-retreat assembly 330 further includes a limit socket 350. The limit socket 350 is located in the movable hole 103 and fixedly sleeved with the movable mold assembly 100. The limit socket 350 is provided with a telescopic hole 351. The telescopic hole 351 is respectively communicated with the receiving groove 104 and the braking groove 102. The anti-retreat rod 331 also passes through the telescopic hole 351 and is movably connected with the limit socket 350. In this embodiment, there is no gap between the limit socket 350 and the anti-retreat rod 331, which avoids the circumferential movement of the anti-retreat rod 331, improves the locking effect of the anti-retreat rod 331, and further improves the locking effect of the locking mechanism 300. Further, it ensures that the core-pulling rod 220 is in the molding position after the mold is closed, and further avoids the problem of the size of the casting 10c exceeding the tolerance. When the limit socket 350 is worn, only the limit socket 350 needs to be replaced, which avoids the scrapping of the movable mold assembly 100 and improves the service life of the movable mold assembly 100.

[0056] As Figure 7 shown, in one embodiment, the limit socket 350 is a sleeve, which reduces the processing difficulty of the limit socket 350. In this embodiment, the anti-retreat rod 331 is slidably connected with the limit socket 350. In another embodiment, the limit socket 350 is a bearing. In this embodiment, when the anti-retreat rod 331 slides relative to the limit socket 350, the anti-retreat rod 331 is in rolling connection with the balls in the bearing, which improves the smoothness of the anti-retreat rod 331, reduces the wear of the limit socket 350, and improves the service life of the limit socket 350.

[0057] As Figure 7 shown, in one embodiment, the limit socket 350 is located at one end of the movable hole 103 adjacent to the braking groove 102, so that the limit socket 350 is located at the second end of the anti-retreat rod 331, that is, the limit socket 350 is located at the stress end of the anti-retreat rod 331, which improves the limiting effect of the limit socket 350, and further improves the locking effect of the anti-retreat rod 331.

[0058] It can be understood that when the limit socket part 350 is worn to a certain extent, the limit socket part 350 needs to be replaced. Since the space of the braking groove 102 is small, it is impossible to remove the limit socket part 350 from the braking groove 102. Therefore, the disassembly operation can only be carried out on the side of the moving die assembly 100 adjacent to the fixed die structure 10b. However, since the die-casting mold 10 is usually used to manufacture products with larger sizes, the thickness of the moving die assembly 100 is large, resulting in that the disassembly and assembly tool is difficult to reach the installation position of the limit socket part 350, making the disassembly and installation of the limit socket part 350 less convenient.

[0059] As Figure 7 shown, in order to improve the disassembly and assembly convenience of the limit socket part 350, in one embodiment, a disassembly avoidance groove 106 is formed on the side of the moving die assembly 100 adjacent to the fixed die structure 10b. The disassembly avoidance groove 106 is communicated with the receiving groove 104, and the groove wall of the disassembly avoidance groove 106 and the groove wall of the receiving groove 104 jointly form a step surface. In this embodiment, due to the existence of the disassembly avoidance groove 106, the disassembly and assembly tool can enter the disassembly avoidance groove 106 for operation, so that the disassembly and assembly tool is closer to the installation position of the limit socket part 350, improving the disassembly and assembly convenience of the socket part.

[0060] It should be noted that since one end of the movable hole 103 adjacent to the fixed die structure 10b penetrates through the disassembly avoidance groove 106, one end of the movable hole 103 adjacent to the fixed die structure 10b is Figure 7 invisible.

[0061] However, the setting of the disassembly avoidance groove 106 will cause one end of the anti-return rod 331 adjacent to the fixed die structure 10b not to be stressed. When one end of the anti-return rod 331 adjacent to the fixed die structure 10b is impacted, for example, when the casting 10c impacts one end of the anti-return rod 331 adjacent to the fixed die structure 10b during extraction, the deformation of the anti-return rod 331 will be large, resulting in irreversible deformation or even fracture of the anti-return rod 331, and then the anti-return rod 331 is damaged.

[0062] To improve the impact resistance of the anti-return rod 331, as Figure 7 shown, in one embodiment, the anti-return assembly 330 further includes a protective sleeve 360. The protective sleeve 360 is located in the disassembly avoidance groove 106 and sleeved on the moving die assembly 100. The protective sleeve 360 is provided with a socket hole 361. The part of the anti-return rod 331 corresponding to the disassembly avoidance groove 106 is located in the socket hole 361 and sleeved on the protective sleeve 360, so that the protective sleeve 360 plays a limiting role on the anti-return rod 331. When one end of the anti-return rod 331 adjacent to the fixed die structure 10b is impacted, due to the limiting effect of the protective sleeve 360, the deformation of the anti-return rod 331 is inhibited, improving the impact resistance of the anti-return rod 331.

[0063] Furthermore, the protective sleeve 360 is of an elastic structure. In this embodiment, it can be a silica gel sleeve, a rubber sleeve or other existing elastic sleeves. When the anti-retreat rod 331 is impacted, the anti-retreat rod 331 is slightly deformed. At the same time, the protective sleeve 360 alleviates the impact force on the anti-retreat rod 331 through compression. After the impact force is eliminated, both the anti-retreat rod 331 and the protective sleeve 360 recover elastically. Since the protective sleeve 360 is of an elastic structure, the anti-retreat rod 331 can be slightly deformed and elastically recovered, avoiding the relatively concentrated stress of the anti-retreat rod 331, thereby suppressing the problem of cracks generated in the anti-retreat rod 331 and improving the locking life of the anti-retreat rod 331.

[0064] As Figure 7 shown, in one of the embodiments, the protective sleeve 360 is located in the disassembly avoidance groove 106 and is threadedly connected to the moving die assembly 100. In this embodiment, due to the gap in the threaded connection structure, there is a gap between the protective sleeve 360 and the moving die assembly 100 after the protective sleeve 360 is fixed to the disassembly avoidance groove 106. When the anti-retreat rod 331 is impacted, the anti-retreat rod 331 has a gap for slight deformation, that is, the anti-retreat rod 331 can push the protective sleeve 360 to move slightly. After the impact force is small, since the deformation of the anti-retreat rod 331 is small, the anti-retreat rod 331 can elastically recover, thus reducing the stress concentration of the anti-retreat rod 331 and avoiding the problem of cracks in the anti-retreat rod 331 after impact, and improving the service life of the anti-retreat rod 331. Moreover, since the protective sleeve 360 is threadedly connected to the moving die assembly 100, the disassembly and installation convenience and disassembly efficiency of the protective sleeve 360 are improved.

[0065] In one of the embodiments, two spaced-apart insertion grooves are provided on the side of the protective sleeve 360 adjacent to the fixed die structure 10b. In this embodiment, when disassembling the protective sleeve 360, first insert the disassembly tool into the two insertion grooves and clamp the protective sleeve 360, and then pull out or rotate out the protective sleeve 360, which improves the convenience and efficiency of disassembling the protective sleeve 360.

[0066] Furthermore, the protective sleeve 360 is provided with hook-embedding grooves on the peripheral walls of each insertion groove. In this embodiment, when it is necessary to remove the protective sleeve 360, insert the disassembly tool into the two insertion grooves, then hook the hook of the disassembly tool into the hook-embedding grooves corresponding to the two insertion grooves, and finally pull out or rotate out the protective sleeve 360. Since the disassembly tool can also be hooked into the hook-embedding grooves corresponding to the two insertion grooves, the connection strength between the disassembly tool and the protective sleeve 360 is higher, reducing the difficulty of disassembling the protective sleeve 360.

[0067] Compared with the prior art, the present invention has at least the following advantages:

[0068] 1. When the die-casting mold 10 is in the closed mold state, the second connecting rod 322 is parallel to the third connecting rod 323 and forms a locking rod group 320a. The locking rod group 320a is parallel to the axial direction of the core-pulling rod 220. The fixed mold structure 10b abuts against the first end of the anti-retreat component 330, so that the second end of the anti-retreat component 330 abuts against the braking member 312. In addition, the braking member 312 also abuts against the groove wall of the braking groove 102, so that the braking member 312 is fixed between the second end of the anti-retreat component 330 and the groove wall of the braking groove 102. Furthermore, the positions of the sliding component 310 and the connecting rod component 320 are both kept fixed, and the fixed mold structure 10b, the anti-retreat component 330, the first connecting rod 321, the locking rod group 320a and the core-pulling rod 220 are fixedly connected in sequence in the closed mold state. When the core-pulling rod 220 is subjected to a normal bulging force, the normal bulging force will tend to push the core-pulling rod 220 to reset. At this time, since the fixed mold structure 10b, the anti-retreat component 330, the first connecting rod 321, the locking rod group 320a and the core-pulling rod 220 are fixedly connected in sequence in the closed mold state, the normal bulging force is conducted to the fixed mold structure 10b through the locking rod group 320a, the first connecting rod 321 and the anti-retreat component 330 in sequence, that is, the normal bulging force is conducted to the opening and closing mold direction, reducing the normal bulging force received by the core-pulling rod 220, avoiding the core-pulling rod 220 from moving in the reset direction, that is, avoiding the core-pulling rod 220 and the piston rod 211 from retreating, ensuring that the core-pulling rod 220 remains in the forming position during the forming process, and further avoiding the problem of dimensional tolerance of the casting 10c.

[0069] 2. Since the die-casting inclined core-pulling locking structure 10a avoids the problem of the core-pulling rod 220 retreating, it is not necessary to replace a larger oil cylinder 210, making the structures of the mold and the die-casting machine more compact.

[0070] The above embodiments only represent several implementation manners of the present invention. The description is relatively specific and detailed, but it cannot be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the invention patent shall be subject to the appended claims.

Claims

1. A die-casting inclined core-pulling locking structure, characterized in that, include: The movable mold assembly is provided with a connecting slide groove and a brake groove; The oblique core-pulling mechanism comprises an oil cylinder and a core-pulling rod, wherein the cylinder body of the oil cylinder is mounted on the movable mold assembly, and the core-pulling rod is fixedly connected to the piston rod of the oil cylinder; The locking mechanism comprises a sliding assembly, a connecting rod assembly, a backstop assembly and a pulling assembly, wherein the sliding assembly comprises a sliding member and a brake member, the sliding member is slidably connected to the sliding groove, the brake member is protrudingly connected to the sliding member, and the brake member is also located in the brake groove; the connecting rod assembly comprises a first connecting rod, a second connecting rod and a third connecting rod, the first end of the first connecting rod is rotatably connected to the sliding member, the first end of the second connecting rod is rotatably connected to the cylinder body, the first end of the third connecting rod is rotatably connected to the second end of the first connecting rod and the second end of the second connecting rod respectively, and the second end of the third connecting rod is rotatably connected to the core pulling rod; the backstop assembly is elastically connected to the movable mold assembly, the pulling assembly is installed on the movable mold assembly, and the power output end of the pulling assembly is fixedly connected to the brake member; The second connecting rod and the third connecting rod are parallel to each other after the mold is closed and form a locking rod group, and the locking rod group is parallel to the axial direction of the core-pulling rod. The first end of the backstop assembly is used to abut against the fixed mold structure during mold closing to push the second end of the backstop assembly to abut against the brake member after the mold is closed. The brake member also abuts against the groove wall of the brake groove after the mold is closed, so that the brake member is fixed between the second end of the backstop assembly and the groove wall of the brake groove after the mold is closed; the power output end of the pulling assembly is used to pull the sliding member during mold opening to rotate the second connecting rod in the direction of the sliding member; The movable mold component is provided with a movable hole, the movable hole extending to a side surface of the movable mold component adjacent to the fixed mold structure, and the movable hole also extending to the brake groove; The backstop assembly includes a backstop rod and a return spring, the backstop rod is inserted into the movable hole, and the return spring abuts against the backstop rod and the movable mold assembly respectively; the first end of the backstop rod is used to abut against the fixed mold structure when the mold is closed, so as to push the second end of the backstop rod to abut against the brake member when the mold is closed, and the return spring pushes the backstop rod to separate from the brake member when the mold is opened; A braking slope is provided on the side of the braking member facing away from the first connecting rod, and a stopping slope is formed on the second end of the stopping rod, and the stopping slope is in contact with the braking slope during mold closing; A limiting portion is convexly provided on the outer side of the anti-retraction rod, and a receiving groove is further provided on the movable mold assembly. The movable hole passes through the receiving groove, and the return spring is arranged in the receiving groove and sleeved with the anti-retraction rod. The two ends of the return spring are respectively in contact with the limiting portion and the groove wall of the receiving groove; The first end of the first connecting rod is hinged to the sliding member, the first end of the second connecting rod is hinged to the cylinder body, the first end of the third connecting rod is hinged to the second end of the first connecting rod and the second end of the second connecting rod respectively, and the second end of the third connecting rod is hinged to the core-pulling rod; The die-casting inclined core-pulling locking structure includes two connecting pins. The first end of the first connecting rod is hinged to the sliding member through one of the connecting pins, and the first end of the third connecting rod is hinged to the second end of the first connecting rod and the second end of the second connecting rod through the other connecting pin respectively.

2. The die-casting inclined core-pulling locking structure according to claim 1, wherein The pulling assembly includes a mounting seat, a traction rod, and a traction spring. The mounting seat is fixedly connected to the moving die assembly. The traction rod is movably disposed through the mounting seat. The traction rod is also fixedly connected to the braking member. The traction spring is connected to the mounting seat and the traction rod respectively. The traction spring pushes the traction rod during mold opening so that the traction rod pulls the braking member.

3. The die-casting inclined core-pulling locking structure according to claim 2, wherein The traction spring is sleeved on the traction rod.

4. The die-casting inclined core-pulling locking structure according to claim 2, wherein A contact portion protrudes from the first end of the traction rod. The second end of the traction rod is fixedly connected to the braking member. The traction spring abuts against the mounting seat and the contact portion respectively.

5. A die-casting mold, characterized in that, Including the die-casting inclined core-pulling locking structure according to any one of claims 1 to 4, the die-casting mold further includes a fixed mold structure. The fixed mold structure abuts against the first end of the anti-retreat assembly during mold closing to push the second end of the anti-retreat assembly to abut against the braking member during mold closing.

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