Novel hydraulic core-pulling mechanism and die-casting die

Abstract

The utility model provides a novel hydraulic core-pulling mechanism. The novel hydraulic core-pulling mechanism comprises a supporting assembly, a driving assembly, a forming assembly, a sliding guide assembly and a core-pulling auxiliary block. The supporting assembly comprises a supporting frame and a connecting frame, one end of the connecting frame is connected with the supporting frame, and the other end of the connecting frame is connected with the outer wall of the die-casting die. The driving assembly comprises a hydraulic cylinder on the supporting frame. One end of the forming assembly is inserted into a cavity of the die-casting die. The sliding guiding assembly comprises a sliding block, one end of the sliding block is connected with the piston rod, the other end of the sliding block is connected with the other end of the forming assembly, and the sliding block is provided with a limiting groove. The core-pulling auxiliary block comprises a connecting part and an inclined guide part which are connected, the inclined guide part is fixedly connected with the die-casting die through the connecting part, and the inclined guide part movably abuts against the interior of the limiting groove. The utility model further provides a die-casting die. The die-casting die comprises a fixed die assembly, a movable die assembly and the novel hydraulic core-pulling mechanism. According to the core-pulling device, the problem of demolding under long-distance and large core-pulling force is solved by utilizing the cooperative movement between the core-pulling auxiliary block and the sliding block.

Description

Technical Field

[0001] The present disclosure relates to the technical field of die-casting dies, and in particular to a novel hydraulic core-pulling mechanism and a die-casting die. Background Art

[0002] In the die-casting process, if the casting surface contains structural features such as through-holes, grooves, or bosses, conventional demolding techniques cannot ensure that the casting can be smoothly separated from the mold. To overcome this demolding challenge, it is usually necessary to integrate a core pulling mechanism into the mold design to facilitate the separation of the casting from the mold. Traditional core pulling mechanisms are mainly divided into two types: hydraulic cylinder-driven and mechanically driven. Hydraulic cylinder-driven core pulling mechanisms are suitable for applications with long distances and high core pulling forces; mechanically driven core pulling mechanisms are more suitable for applications with short distances and low core pulling forces.

[0003] However, in actual production, when the core pulling distance of the casting is long and the clamping force is large, in order to enable the hydraulic cylinder-driven core pulling mechanism to be demolded, it is necessary to increase the core pulling force by increasing the cylinder diameter, which makes the cost of the core pulling mechanism higher and shortens the service life of the cylinder, thereby increasing the production cost of the casting. Utility Model Content

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a new hydraulic core pulling mechanism and die casting mold with low cost and long service life.

[0005] The purpose of this disclosure is achieved through the following technical solutions:

[0006] A new hydraulic core pulling mechanism includes:

[0007] A support assembly, the support assembly comprising a support frame and a connecting frame, one end of the connecting frame being connected to the support frame, and the other end of the connecting frame being connected to the outer wall of the die-casting mold;

[0008] A drive assembly, the drive assembly comprising a hydraulic cylinder mounted on the support frame;

[0009] a molding component, one end of which is inserted into the cavity of the die-casting mold;

[0010] A guide slide assembly, the guide slide assembly includes a slider, the forming assembly is connected to the power output end of the hydraulic cylinder through the slider, one end of the slider is connected to the piston rod, and the other end of the slider is connected to the other end of the forming assembly, and the slider is provided with a limiting groove;

[0011] The core pulling auxiliary block includes a connecting portion and an inclined guide portion connected to each other. The inclined guide portion is fixedly connected to the die-casting mold through the connecting portion, and the inclined guide portion is movably abutted in the limiting groove.

[0012] In one embodiment, the connecting portion is embedded in the fixed mold assembly of the die-casting mold, and the core-pulling auxiliary block is detachably connected to the fixed mold assembly.

[0013] In one embodiment, an abutting inclined surface is provided at the end of the inclined guide portion facing away from the connecting portion, and the abutting inclined surface forms an arc transition with the side surface of the inclined guide portion.

[0014] In one embodiment, the inclination angles of the inclined guide portion and the limiting groove are both 20°, the slider is an irregular structure, the limiting groove is opened in the middle of the slider, and the side wall of the limiting groove close to the molding component is higher than the other side wall opposite to it.

[0015] In one embodiment, the height of one end of the slider close to the molding assembly is higher than the height of the other end of the slider.

[0016] In one embodiment, the new hydraulic core pulling mechanism also includes a buffer assembly, which includes a fixed rod, a movable rod, a first connecting member, a second connecting member and an elastic buffer member. The fixed rod is fixed to the bottom of the support frame, and the movable rod is slidably connected to the bottom of the support frame. The fixed rod is sleeved on one end of the movable rod, one end of the first connecting member is connected to the other end of the movable rod, and the other end of the first connecting member is connected to the bottom of the slider, one end of the second connecting member is connected to the first connecting member, and the other end of the second connecting member abuts against the elastic buffer member, and the elastic buffer member is located in the mold.

[0017] In one embodiment, the first connecting member includes a connecting head and a connecting member column, the connecting member head is sleeved on one end of the movable rod, one end of the connecting member body is sleeved on the connecting head, and the other end of the connecting member body is connected to the bottom of the slider, and the second connecting member includes a fixed plate and a movable member, the fixed plate is fixedly connected to the die-casting mold, one end of the movable member is passed through the fixed plate, and the other end of the movable member is connected to the connecting member body.

[0018] In one embodiment, a clamping block is formed at the bottom of the sliding block, the guide slide assembly includes a guide slide member, the guide slide member is provided with a guide slide groove, and the clamping block is slidably connected in the guide slide groove.

[0019] In one embodiment, the molding assembly includes a core pulling needle and a fixed block, one end of the core pulling needle is located in the mold cavity, and the other end of the core pulling needle is connected to the slider through the fixed block.

[0020] A die-casting mold, the die-casting mold comprising a fixed mold assembly, a movable mold assembly and the new hydraulic core-pulling mechanism described in any one of the above embodiments, the fixed mold assembly is provided with a fixed groove, the movable mold assembly is provided with an installation groove and a avoidance groove, the installation groove is connected to the avoidance groove, the connecting frame of the new hydraulic core-pulling mechanism is installed on both sides of the installation groove, the core-pulling auxiliary block of the new hydraulic core-pulling mechanism is embedded in the fixed groove, the guide sliding assembly of the new hydraulic core-pulling mechanism is installed in the installation groove, one end of the buffer assembly of the new hydraulic core-pulling mechanism is located in the avoidance groove, the avoidance groove is provided with an accommodating cavity on the side close to the molding assembly of the new hydraulic core-pulling mechanism, and the elastic buffer part of the buffer assembly is located in the accommodating cavity.

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

[0022] 1. The new hydraulic core pulling mechanism sets a core pulling auxiliary block and a slider and uses the coordinated movement between the two to perform the core pulling action in steps, solving the demoulding problem under long distance and large core pulling force.

[0023] 2. The core-pulling auxiliary block drives the slider in the core-pulling direction, separating the molded component from the casting. This reduces the clamping force between the molded component and the casting, and therefore the core-pulling force required. This reduces the burden on the hydraulic cylinder, allowing smaller hydraulic cylinders to complete the operation, thereby reducing mold costs, extending the service life of the hydraulic cylinder, and ensuring the stability of the core-pulling process. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present disclosure and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 This is a structural diagram of a new hydraulic core-pulling mechanism according to an embodiment;

[0026] Figure 2 for Figure 1 The structural diagram of the new hydraulic core pulling mechanism from another perspective is shown;

[0027] Figure 3 Schematic diagram of the structure of a die-casting mold according to an embodiment;

[0028] Figure 4 for Figure 2 A cross-sectional view of the die casting mold shown;

[0029] Figure 5 for Figure 1 The schematic diagram of the structure of the core pulling auxiliary block of the new hydraulic core pulling mechanism is shown;

[0030] Figure 6 for Figure 1 The structural diagram of the slider of the new hydraulic core pulling mechanism is shown;

[0031] Figure 7 for Figure 1 The schematic diagram of the structure of the buffer component of the new hydraulic core pulling mechanism is shown. DETAILED DESCRIPTION

[0032] To facilitate understanding of the present disclosure, a more comprehensive description of the present disclosure will be provided below with reference to the accompanying drawings. The accompanying drawings illustrate preferred embodiments of the present disclosure. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the disclosure.

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

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this disclosure pertains. The terms used herein in the specification of this disclosure are intended only to describe specific embodiments and are not intended to limit this disclosure. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0035] In order to better understand the technical solutions and beneficial effects of the present disclosure, the present disclosure is further described in detail below with reference to specific embodiments:

[0036] See also Figures 1 to 7, which is a new hydraulic core pulling mechanism 10 of an embodiment of the present invention, includes a support assembly 100, a drive assembly 200, a molding assembly 300, a guide slide assembly 400 and a core pulling auxiliary block 500. The support assembly 100 includes a support frame 110 and a connecting frame 120. One end of the connecting frame 120 is connected to the support frame 110, and the other end of the connecting frame 120 is connected to the outer wall of the die-casting mold 20. The drive assembly 200 includes a hydraulic cylinder 210 mounted on the support frame 110. One end of the molding assembly 300 is inserted into the mold cavity of the die-casting mold 20. The guide slide assembly 400 includes a slider 410. The molding assembly 300 is connected to the power output end of the hydraulic cylinder 210 through the slider 410. One end of the slider 410 is connected to the piston rod 211, and the other end of the slider 410 is connected to the other end of the molding assembly 300. The slider 410 is provided with a limiting groove 411. The core pulling auxiliary block 500 includes a connecting portion 510 and an inclined guide portion 520 , which are connected to each other. The inclined guide portion 520 is fixedly connected to the die-casting mold 20 through the connecting portion 510 , and the inclined guide portion 520 movably abuts against the limiting groove 411 .

[0037] In this embodiment, the novel hydraulic core-pulling mechanism 10 utilizes the coordinated motion of a core-pulling auxiliary block 500 and a slider 410 to perform the core-pulling operation in steps, thus resolving the demolding problem under long-distance and high-force core-pulling conditions. Because the inclined guide 520 is fixedly connected to the die-casting mold 20 via the connecting portion 510 and movably abuts within the retaining groove 411, when the mold is opened, the core-pulling auxiliary block 500 moves upward with the fixed mold assembly 21, driving the slider 410 in the core-pulling direction, separating the molding assembly 300 from the casting; subsequently, the hydraulic cylinder 210 completely removes the molding assembly 300 from the casting. At the same time, when the core pulling auxiliary block 500 opens the mold, it drives the slider 410 to move in the core pulling direction, so that the molding component 300 is separated from the casting, thereby reducing the clamping force between the molding component 300 and the casting, that is, reducing the core pulling force required for core pulling, thereby reducing the burden on the hydraulic cylinder 210, so that a smaller-sized hydraulic cylinder 210 can also complete the operation, thereby reducing the mold cost, extending the service life of the hydraulic cylinder 210, and ensuring the stability of the core pulling process.

[0038] The mold opening principle of the new hydraulic core pulling mechanism 10 is as follows: when opening the mold, the core pulling auxiliary block 500 disengages from the limiting groove 411 of the slider 410 as the mold moves, and the inclined guide part 520 of the core pulling auxiliary block 500 abuts against the inclined surface of the limiting groove 411 wall, transmitting the mold opening force to the slider 410, causing the slider 410 to move in the core pulling direction, thereby driving the molding assembly 300 to move in the core pulling direction until the core pulling auxiliary block 500 is completely disengaged from the limiting groove 411 and the force transmission stops; then, the hydraulic cylinder 210 drives the piston rod 211 to retract, and continues to drive the slider 410 and the molding assembly 300 to move in the core pulling direction until the molding assembly 300 is completely pulled out of the casting.

[0039] like Figures 1 to 5 As shown, in one embodiment, the connecting portion 510 of the core pulling auxiliary block 500 is embedded in the fixed mold assembly 21 of the die-casting mold 20, and the core pulling auxiliary block 500 is detachably connected to the fixed mold assembly 21. Specifically, in this embodiment, the fixed mold assembly 21 is provided with a fixing groove and a fixing through-hole connected to the fixing groove. A fixing hole 501 is provided at the top of the core pulling auxiliary block 500. The connecting portion 510 of the core pulling auxiliary block 500 is embedded in the fixing groove, and is connected by a fastener (not shown) passing through the fixing through-hole and the fixing hole 501. The fixed connection between the core pulling auxiliary block 500 and the fixed mold assembly 21 by fasteners can improve the stability of the connection and prevent the core pulling auxiliary block 500 from loosening or displacement during use; at the same time, it is convenient for installation and maintenance.

[0040] Furthermore, the fixed mold assembly 21 has a fixed groove to embed the core pulling auxiliary block 500 therein, thereby improving the stability of the connection and the accuracy of the installation. At the same time, it can prevent the core pulling auxiliary block 500 from being offset during the process of being separated from the limiting groove 411, thereby preventing the core pulling auxiliary block 500 from being offset and causing the slider 410 to move or be damaged.

[0041] like Figures 1 to 5 As shown, in one embodiment, the end of the inclined guide portion 520 facing away from the connecting portion 510 is provided with an abutting inclined surface 521, and a circular arc transition is formed between the abutting inclined surface 521 and the side surface of the inclined guide portion 520. It can be understood that the use of a circular arc transition between the inclined guide portion 520 and the connecting inclined surface 521 can reduce geometric mutations, avoid stress concentration, and evenly transmit and disperse stress, reducing local stress accumulation, and improving the overall structural strength of the core pulling auxiliary block 500. At the same time, the circular arc transition optimizes the contact effect between the inclined guide portion and the limiting groove wall, making the relative movement between the two smoother and more fluid, further reducing friction resistance and wear, and increasing the service life of the core pulling auxiliary block 500 and the slider 410.

[0042] like Figures 1 to 6As shown, in one embodiment, a connecting engaging groove 412 and a sliding groove 413 are provided at one end of the slider 410 near the drive assembly 200. The diameter of the engaging groove 412 is larger than the diameter of the sliding groove 413. The piston rod 211 is slidably arranged in the sliding groove 413. A third connecting member 2111 is provided at one end of the piston rod 211. The third connecting member is engaged with the engaging groove 412. To ensure smooth relative movement, a clearance zone 412a is left between the third connecting member 2111 and the groove wall in the sliding direction of the engaging groove 412. Specifically, in this embodiment, the width of the clearance zone 412a is greater than the displacement distance of the slider 410 caused by the core pulling auxiliary block 500 during mold opening. This prevents interference between the slider 410 and the piston rod 211 when moving in the core pulling direction during mold opening, thereby ensuring smooth movement of the slider 410 and the normal operation of the hydraulic system, avoiding damage to the new hydraulic core pulling mechanism 10, and improving the reliability and service life of the new hydraulic core pulling mechanism 10.

[0043] like Figure 1 and Figure 6 As shown, in one embodiment, the inclined guide portion 520 and the limiting groove 411 are both inclined at an angle of 20°. The slider 410 has an irregular structure, and the limiting groove 411 is located in the middle of the slider 410. The side wall of the limiting groove 411 near the molding assembly 300 is higher than the other side wall thereof. It is understood that the structure of the limiting groove 411 is compatible with the structure of the inclined guide portion 520. The limiting groove 411 is located in the middle of the slider 410 so that the core pulling auxiliary block 500 has the locking function of a wedge block. When the mold is closed, the inclined guide portion 520 enters the limiting groove 411 along the groove wall of the limiting groove 411. This ensures that the core pulling inclined guide portion 500 accurately enters the limiting groove 411, avoiding additional wear and impact caused by inaccurate positioning. After the mold is closed, the contact between the inclined guide portion 520 and the limiting groove 411 acts to lock the slider 410, preventing the slider 410 from moving during the die casting process and affecting the molding accuracy of the casting. At the same time, the two inclined surfaces of the inclined guide portion are in contact with the side walls of the limiting groove, thereby preventing the slider from being displaced or falling off during the die-casting process, thereby ensuring the molding quality.

[0044] like Figure 1 、 Figure 4 and Figure 7As shown, in one embodiment, the new hydraulic core pulling mechanism 10 also includes a buffer assembly 600, which includes a fixed rod 610, a movable rod 620, a first connecting member 630, a second connecting member 640 and an elastic buffer 650. The fixed rod 610 is fixed to the bottom of the hydraulic cylinder 210 support frame 110, the movable rod 620 is slidably connected to the bottom of the hydraulic cylinder 210 support frame 110, the fixed rod 610 is sleeved on one end of the movable rod 620, one end of the first connecting member 630 is connected to the other end of the movable rod 620, the other end of the first connecting member 630 is connected to the bottom of the slider 410, one end of the second connecting member 640 is connected to the first connecting member 630, and the other end of the second connecting member 640 abuts against the elastic buffer 650, and the elastic buffer 650 is located in the mold. It can be understood that the buffer assembly 600 can effectively reduce the vibration and noise caused by mechanical impact during the die casting process, improve the overall comfort of the production environment, and at the same time extend the service life of the mechanism and reduce maintenance costs.

[0045] Furthermore, the elastic buffer 650 indirectly limits the position and movement of the slider 410. In particular, when the slider 410 is close to the working position, the deformation of the elastic buffer 650 can limit the further movement of the slider 410 to a certain extent, thereby preventing excessive displacement.

[0046] Specifically, in this embodiment, the elastic buffer 650 is a spring.

[0047] like Figure 1 、 Figure 4 and Figure 7 As shown, in one embodiment, the first connector 630 includes a connector head 631 and a connector body 632. The connector head 631 is sleeved on one end of the movable rod 620. One end of the connector body 632 is sleeved with the connector head 631, and the other end of the connector body 632 is connected to the bottom of the slider 410. The second connector 640 includes a fixed plate 641 and a movable member 642. The fixed plate 641 is connected to the die-casting mold 20. One end of the movable member 642 is inserted into the fixed plate 641, and the other end of the movable member 642 is connected to the connector body 632. It can be understood that when the mold is opened, the slider 410 moves in the core-pulling direction, driving the first connector 630 to move in the core-pulling direction, thereby pushing the second connector 640 to move in the same direction. At this time, the movable member 642 of the second connector 640 moves in the core-pulling direction in the die-casting mold 20, causing the elastic buffer 650 to gradually recover, thereby providing a buffering and shock-absorbing effect. When the mold is closed, the slider 410 moves toward the molding assembly 300, driving the first connecting member 630 to move, and then pushing the movable member 642 of the second connecting member 640 to compress the elastic buffer member 650, which plays a limiting role and prevents the slider 410 from colliding with the die-casting mold 20.

[0048] like Figure 1 and Figure 6 As shown, in one embodiment, a snap-in block 413 is formed at the bottom of the slider 410, and the guide slide assembly 400 includes a guide slide 420, which is provided with a guide slide groove 421, and the snap-in block 413 is slidably connected to the guide slide groove 421. Specifically, in this embodiment, the guide slide 420 protrudes from the die-casting mold 20, providing a larger sliding distance for the slider 410, ensuring that the molding assembly 300 is completely disengaged. The guide slide 420 is provided with a guide slide groove 421 to cooperate with the snap-in block 413 at the bottom of the slider 410 to accurately guide the movement trajectory of the slider 410, ensuring that the slider 410 does not deviate during movement, thereby improving the stability of the molding assembly 300.

[0049] like Figures 1 to 4 As shown, in one embodiment, the molding assembly 300 includes a core pulling needle 310 and a fixed block 320. One end of the core pulling needle 310 is located in the cavity of the die-casting mold 20, and the other end of the core pulling needle 310 is connected to the slider 410 through the fixed block 320. It can be understood that the fixed block 320 provides support for the slider 410, thereby enhancing the stability and durability of the molding assembly 300. Specifically, in this embodiment, the fixed block 320 is provided with a mounting hole 321, and the end of the core pulling needle 310 close to the slider 410 is provided with a hanging platform 311. The diameter of the hanging platform 311 is larger than the mounting hole 321, thereby ensuring that the positioning and movement path of the core pulling needle 310 in the cavity will not deviate from the predetermined track, avoiding errors in the core pulling process, and improving the molding accuracy of the product.

[0050] See Figures 1 to 7 The present disclosure also provides a die-casting mold 20, which includes a fixed mold assembly 21, a movable mold assembly 22 and a new hydraulic core-pulling mechanism 10 in any of the above embodiments. The fixed mold assembly 21 is provided with a fixed groove (not shown in the figure), and the movable mold assembly 22 is provided with a mounting groove (not shown in the figure) and a avoidance groove (not shown in the figure). The mounting groove is connected to the avoidance groove. The connecting frame 120 of the new hydraulic core-pulling mechanism 10 is installed on both sides of the mounting groove. The core-pulling auxiliary block 500 of the new hydraulic core-pulling mechanism 10 is embedded in the fixed groove. The guide sliding assembly 400 of the new hydraulic core-pulling mechanism 10 is installed in the mounting groove. One end of the buffer assembly 600 of the new hydraulic core-pulling mechanism 10 is located in the avoidance groove. The avoidance groove is provided with an accommodating cavity (not shown in the figure) on the side close to the molding assembly 300. The elastic buffer member 650 of the buffer assembly 600 is located in the accommodating cavity.

[0051] In this embodiment, the die-casting mold 20 is equipped with a novel hydraulic core-pulling mechanism 10. The core-pulling auxiliary block 500 and the slider 410 of the novel hydraulic core-pulling mechanism 10 work together to achieve sequential core-pulling, thereby resolving the demolding problem under conditions of long distances and high core-pulling forces. Furthermore, the sequential core-pulling action reduces the requirements of the novel hydraulic core-pulling mechanism 10 on the drive assembly 200, thereby reducing mold costs and extending the mold's service life.

[0052] Compared with the prior art, the present disclosure has at least the following advantages:

[0053] 1. The new hydraulic core pulling mechanism sets a core pulling auxiliary block and a slider and uses the coordinated movement between the two to perform the core pulling action in steps, solving the demoulding problem under long distance and large core pulling force.

[0054] 2. The core-pulling auxiliary block drives the slider in the core-pulling direction, separating the molded component from the casting. This reduces the clamping force between the molded component and the casting, and therefore the core-pulling force required. This reduces the burden on the hydraulic cylinder, allowing smaller hydraulic cylinders to complete the operation, thereby reducing mold costs, extending the service life of the hydraulic cylinder, and ensuring the stability of the core-pulling process.

[0055] The above-described embodiments merely represent several implementation methods of the present disclosure. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the disclosed patent. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the scope of the present disclosure, all of which fall within the scope of protection of the present disclosure. Therefore, the scope of protection of the disclosed patent shall be determined by the appended claims.

Claims

1. A new type of hydraulic core pulling mechanism for die casting mold, characterized in that: include: A support assembly, the support assembly comprising a support frame and a connecting frame, one end of the connecting frame being connected to the support frame, and the other end of the connecting frame being connected to the outer wall of the die-casting mold; A drive assembly, the drive assembly comprising a hydraulic cylinder mounted on the support frame; a molding component, one end of which is inserted into the cavity of the die-casting mold; A guide slide assembly, the guide slide assembly includes a slider, the forming assembly is connected to the power output end of the hydraulic cylinder through the slider, one end of the slider is connected to the piston rod, and the other end of the slider is connected to the other end of the forming assembly, and the slider is provided with a limiting groove; The core pulling auxiliary block includes a connecting portion and an inclined guide portion connected to each other. The inclined guide portion is fixedly connected to the die-casting mold through the connecting portion, and the inclined guide portion is movably abutted in the limiting groove.

2. The novel hydraulic core pulling mechanism according to claim 1 is characterized in that: The connecting portion is embedded in the fixed die assembly of the die-casting mold, and the core-pulling auxiliary block is detachably connected to the fixed die assembly.

3. The novel hydraulic core pulling mechanism according to claim 1 is characterized in that: An abutting inclined surface is provided at the end of the inclined guide portion away from the connecting portion, and an arc transition is formed between the abutting inclined surface and the side surface of the inclined guide portion.

4. The novel hydraulic core pulling mechanism according to claim 1 is characterized in that: The slider is provided with a connected clamping groove and a sliding groove at one end close to the driving component. The diameter of the clamping groove is larger than the diameter of the sliding groove. The piston rod is slidably arranged in the sliding groove. A third connecting piece is provided at one end of the piston rod. The third connecting piece is clamped in the clamping groove. An air gap is left between the third connecting piece and the groove wall in the sliding direction of the clamping groove.

5. The novel hydraulic core pulling mechanism according to claim 1 is characterized in that: The inclination angles of the inclined guide portion and the limiting groove are both 20°. The slider is an irregular structure. The limiting groove is opened in the middle of the slider. The side wall of the limiting groove close to the forming component is higher than the other side wall opposite to it.

6. The novel hydraulic core pulling mechanism according to claim 1 is characterized in that: The new hydraulic core pulling mechanism also includes a buffer assembly, which includes a fixed rod, a movable rod, a first connecting member, a second connecting member and an elastic buffer. The fixed rod is fixed to the bottom of the support frame, and the movable rod is slidably connected to the bottom of the support frame. The fixed rod is sleeved on one end of the movable rod, one end of the first connecting member is connected to the other end of the movable rod, and the other end of the first connecting member is connected to the bottom of the slider, one end of the second connecting member is connected to the first connecting member, and the other end of the second connecting member abuts against the elastic buffer, and the elastic buffer is located in the mold.

7. The novel hydraulic core pulling mechanism according to claim 6 is characterized in that: The first connecting member includes a connecting head and a connecting member column, the connecting member head is sleeved on one end of the movable rod, one end of the connecting member body is sleeved on the connecting head, and the other end of the connecting member body is connected to the bottom of the slider, the second connecting member includes a fixed plate and a movable member, the fixed plate is fixedly connected to the die-casting mold, one end of the movable member is passed through the fixed plate, and the other end of the movable member is connected to the connecting member body.

8. The novel hydraulic core pulling mechanism according to claim 1 is characterized in that: A clamping block is formed at the bottom of the sliding block, the guide slide assembly includes a guide slide member, the guide slide member is provided with a guide slide groove, and the clamping block is slidably connected in the guide slide groove.

9. The novel hydraulic core pulling mechanism according to claim 1 is characterized in that: The molding component includes a core pulling needle and a fixed block. One end of the core pulling needle is located in the mold cavity, and the other end of the core pulling needle is connected to the slider through the fixed block.

10. A die-casting mold, characterized in that: The die-casting mold includes a fixed mold assembly, a movable mold assembly and a new hydraulic core-pulling mechanism according to any one of claims 1 to 7, the fixed mold assembly is provided with a fixed groove, the movable mold assembly is provided with an installation groove and a avoidance groove, the installation groove is connected to the avoidance groove, the connecting frame of the new hydraulic core-pulling mechanism is installed on both sides of the installation groove, the core-pulling auxiliary block of the new hydraulic core-pulling mechanism is embedded in the fixed groove, the guide sliding assembly of the new hydraulic core-pulling mechanism is installed in the installation groove, one end of the buffer assembly of the new hydraulic core-pulling mechanism is located in the avoidance groove, and the avoidance groove is provided with an accommodating cavity on the side close to the molding assembly of the new hydraulic core-pulling mechanism, and the elastic buffer part of the buffer assembly is located in the accommodating cavity.

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