Core pulling mechanism and die-casting die

Abstract

The utility model provides a core pulling mechanism. The core pulling mechanism comprises a support, a hydraulic cylinder, a guide assembly and a core pulling block. One end of the support is connected with the outer wall of the die-casting die, and the hydraulic cylinder is arranged at the other end of the support. The guide assembly comprises a sliding block, and one end of the sliding block is connected with the power output end of the hydraulic cylinder. The core-pulling block is connected with the power output end of the hydraulic cylinder through the sliding block, one end of the core-pulling block is connected with the sliding block, the other end of the core-pulling block is inserted into the die-casting die, an abutting-pressing protruding block is formed at the end, away from the sliding block, of the core-pulling block, the abutting-pressing protruding block extends into the cavity, and the abutting-pressing protruding block is used for pressing a casting in the cavity. The pressing convex block exceeding the product position is arranged at the front end of the core-pulling block, so that the problem that a casting adheres to a fixed mold can be solved without changing the mold design.

Description

Technical Field

[0001] This disclosure relates to the technical field of die casting technology, and in particular to a core-pulling mechanism and a die casting mold. Background Technology

[0002] In mold design, because the clamping force of the fixed mold is greater than that of the moving mold, castings tend to stick to the fixed mold when the mold is opened, causing deformation of the castings and affecting production efficiency and product quality. To solve the problem of products sticking to the fixed mold, measures such as adding hooks, increasing the draft angle, and adding a fixed mold ejection mechanism are usually adopted.

[0003] However, adding hooks in the moving mold direction, forcing the product to remain in that direction, may leave ejector pin marks or other machining marks inside the product cavity. Increasing the draft angle in the fixed mold direction will affect the product's appearance or function, making it unsuitable for complex structures. Adding a fixed mold ejection mechanism complicates the mold structure, increases manufacturing costs and maintenance difficulty, and has a significant impact on products with high precision requirements.

[0004] In conclusion, existing technologies struggle to balance the simplicity of the overall structure with improved functionality, making it difficult to simultaneously optimize production efficiency and product quality. Utility Model Content

[0005] The purpose of this disclosure is to overcome the shortcomings of the prior art and provide a core-pulling mechanism and die-casting mold that can effectively solve the problem of casting adhesion to the mold without the need for additional mechanisms.

[0006] The purpose of this disclosure is achieved through the following technical solution:

[0007] A core-pulling mechanism for a die-casting mold, comprising:

[0008] A bracket, one end of which is connected to the outer wall of the die-casting mold;

[0009] A hydraulic cylinder is mounted at the other end of the bracket;

[0010] A guide assembly; the guide assembly includes a slider, one end of which is connected to the power output end of the hydraulic cylinder;

[0011] A core-pulling block is connected to the power output end of the hydraulic cylinder via the slider. One end of the core-pulling block is connected to the slider, and the other end of the core-pulling block is inserted into the die-casting mold. A pressing protrusion is formed at the end of the core-pulling block away from the slider. The pressing protrusion extends into the cavity and is used to press the casting in the cavity.

[0012] In one embodiment, the core-pulling block and the pressing protrusion are integrally formed.

[0013] In one embodiment, an inclined guide groove is formed at the end of the core-pulling block away from the slider, and the inclined guide groove is correspondingly provided with an inclined guide block on the fixed mold assembly.

[0014] In one embodiment, the end of the pressing protrusion away from the slider is provided with a guide slope.

[0015] In one embodiment, the bottom of the pressing protrusion is formed with a pressing portion, which is adapted to fit the contour of the casting and is used to press the casting during the mold opening process.

[0016] In one embodiment, the core-pulling block has a slot and a first connecting hole at one end near the slider, and the slider has a block and a second connecting hole at one end near the core-pulling block. The first connecting hole and the second connecting hole are connected to each other, and the block is disposed in the slot.

[0017] The core-pulling mechanism also includes a connector, which is respectively inserted through the first connecting hole and the second connecting hole.

[0018] In one embodiment, there are multiple first connecting holes and multiple second connecting holes, and the multiple first connecting holes and multiple second connecting holes are connected in a one-to-one correspondence; there are multiple connectors, and each connector is respectively inserted into the corresponding first connecting hole and second connecting hole.

[0019] In one embodiment, the power output end of the hydraulic cylinder is provided with a connector, and the end of the slider near the hydraulic cylinder is provided with a snap-fit ​​groove, and the connector is disposed in the snap-fit ​​groove.

[0020] A die-casting mold includes a fixed mold assembly, a moving mold assembly, and a core-pulling mechanism as described in any of the above embodiments. The fixed mold assembly and the moving mold assembly form a cavity. The moving mold assembly has an installation groove that communicates with the cavity. One end of the core-pulling mechanism is installed in the installation groove.

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

[0022] 1. The core-pulling mechanism features a pressing protrusion at the end of the core-pulling block facing the mold cavity to press against the casting. When the mold closes, the power output end of the hydraulic cylinder extends, causing the core-pulling block, fixed mold assembly, and moving mold assembly to form the mold cavity together. The pressing protrusion extends a certain distance beyond the product position. After the casting is formed, the pressing protrusion presses against the casting without leaving marks on the surface, ensuring the surface quality of the casting. When the mold opens, the power output end of the hydraulic cylinder stops, keeping the core-pulling block stationary. The pressing protrusion forces the casting to remain in the moving mold, preventing deformation caused by adhesion to the fixed mold, which would affect casting quality and production efficiency. After disengaging from the fixed mold, the hydraulic cylinder resets, the core-pulling block disengages from the mold cavity, and the casting is demolded under the action of the moving mold assembly, starting the next production cycle and improving production efficiency.

[0023] 2. The core-pulling mechanism solves the problem of casting sticking to the fixed mold when the casting is opened by pressing the protrusion, thus avoiding leaving marks on the casting and affecting the surface quality of the casting.

[0024] 3. No additional mechanisms are needed in the die-casting mold, the overall structure is simple, easy to manufacture and maintain, and reduces production costs. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this disclosure and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the core-pulling mechanism in one embodiment;

[0027] Figure 2 for Figure 1 A cross-sectional view of the core-pulling mechanism shown;

[0028] Figure 3 for Figure 1 A schematic diagram of the core-pulling block of the core-pulling mechanism shown;

[0029] Figure 4 for Figure 3 A magnified view of a portion of the core-pulling block shown;

[0030] Figure 5 for Figure 3 A schematic diagram of the core-pulling block from another perspective;

[0031] Figure 6 This is a schematic diagram of the structure of a die-casting mold according to one embodiment;

[0032] Figure 7 for Figure 6 The cross-sectional view of the die-casting mold shown. Detailed Implementation

[0033] To facilitate understanding of this disclosure, a more complete description will be given below with reference to the accompanying drawings, which illustrate preferred embodiments of the present disclosure. However, this 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 complete understanding of the disclosure.

[0034] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this disclosure. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0036] To better understand the technical solutions and beneficial effects of this disclosure, the following detailed description is provided in conjunction with specific embodiments:

[0037] Please see Figures 1 to 7 This is a core-pulling mechanism 10 according to an embodiment of the present invention, used in a die-casting mold 20. The core-pulling mechanism 10 includes a bracket 100, a hydraulic cylinder 200, a guide assembly 300, and a core-pulling block 400. One end of the bracket 100 is connected to the outer wall of the die-casting mold 20, and the hydraulic cylinder 200 is installed at the other end of the bracket 100. The guide assembly 300 includes a slider 310, one end of which is connected to the power output end of the hydraulic cylinder 200. The core-pulling block 400 is connected to the power output end of the hydraulic cylinder 200 through the slider 310. One end of the core-pulling block 400 is connected to the slider 310, and the other end of the core-pulling block 400 is inserted into the die-casting mold 20. A pressing protrusion 410 is formed at the end of the core-pulling block 400 away from the slider 310. The pressing protrusion 410 extends into the cavity 23 and is used to press the casting inside the cavity 23.

[0038] In this embodiment, the core-pulling mechanism 10 has a pressing protrusion 410 for pressing the casting at one end of the core-pulling block 400 facing the cavity 23. When the mold is closed, the power output end of the hydraulic cylinder 200 extends, so that the core-pulling block 400, the fixed mold assembly 21, and the moving mold assembly 22 together form the cavity 23, and the pressing protrusion 410 extends a certain distance beyond the product position. After the casting is formed, the pressing protrusion 410 can press the casting without leaving marks on the surface of the casting, ensuring the surface quality of the casting. When the mold is opened, the power output end of the hydraulic cylinder 200 stops, so that the core-pulling block 400 stops, and the pressing protrusion 410 forces the casting to remain on the moving mold, avoiding deformation of the casting due to adhesion to the fixed mold, which would affect the casting quality and production efficiency. After the casting is removed from the fixed mold, the hydraulic cylinder 200 resets, the core-pulling block 400 disengages from the cavity 23, and the casting is demolded under the action of the moving mold assembly 22, starting the next production cycle and improving production efficiency. Furthermore, the core-pulling mechanism 10 solves the problem of casting sticking to the fixed mold when the mold is opened by using the pressing protrusion 410, avoiding leaving marks on the casting and affecting its surface quality. At the same time, no additional mechanism needs to be added to the die-casting mold 20, the overall structure is simple, easy to manufacture and maintain, and reduces production costs.

[0039] like Figures 3 to 5 As shown, in one embodiment, the core-pulling block 400 and the pressing protrusion 410 are integrally formed. It is understood that the integral forming of the pressing protrusion 410 and the core-pulling block 400 improves the overall structural strength of the core-pulling block 400, adapts to high-frequency operation, and ensures the overall stability and reliability of the core-pulling block 400. Simultaneously, the structure of the pressing protrusion 410 matches the overall structure of the core-pulling block 400, ensuring the accurate positioning of the pressing protrusion 410 within the cavity 23, thereby improving the quality of the casting. Furthermore, the integral forming process can reduce the number of parts and assembly steps, simplify manufacturing and assembly processes, and reduce production costs.

[0040] like Figures 3 to 5 As shown, in one embodiment, the end of the core-pulling block 400 away from the slider 310 is formed with an inclined guide groove 420, which is correspondingly set with the inclined guide block on the fixed mold assembly 21.

[0041] like Figures 1 to 5 As shown, in one embodiment, the end of the pressing protrusion 410 away from the slider 310 is provided with a guide slope 411.

[0042] Specifically, in this embodiment, there are two inclined guide grooves 420 and two inclined guide blocks. The two inclined guide grooves 420 are respectively opened on both sides of the pressing protrusion 410, and the two inclined guide blocks are correspondingly arranged on the fixed mold assembly 21. The side of the pressing protrusion 410 facing the cavity 23 is the guide slope 411. The inclined guide grooves 420, inclined guide blocks, and guide slope 411 play a guiding role in the opening and closing of the mold, so that the fixed mold assembly 21 can move smoothly, ensuring smooth mold opening and closing, reducing friction, and extending service life. In addition, the inclined guide grooves 420, inclined guide blocks, and guide slope 411 can provide precise positioning for the core-pulling block 400 when the mold is closed, ensuring that the core-pulling block 400 accurately reaches the predetermined position when the mold is closed, thereby ensuring that the pressing protrusion 410 reaches the accurate position and avoiding offset or misalignment, which would affect the casting quality and production efficiency.

[0043] Furthermore, the inclined contact surface can distribute the load, reduce vibration and impact, and improve the stability and service life of the mold.

[0044] like Figures 3 to 5 As shown, in one embodiment, the bottom of the pressing protrusion 410 has a pressing portion 412, which is configured to correspond to the contour of the casting. The pressing portion 412 is used to press the casting during the mold opening process. It can be understood that the pressing portion 412 is the functional area of ​​the pressing protrusion 410, extending into the cavity 23 and participating in the casting forming process. Therefore, the pressing portion 412 is adapted to the contour of the corresponding casting to ensure that the pressing portion 412 applies pressure evenly, avoiding leaving marks on the casting surface or even causing casting deformation, improving casting quality, ensuring that the casting remains on the moving mold during mold opening, and avoiding deformation caused by adhesion to the fixed mold.

[0045] like Figure 1 , Figure 4 and Figure 5 As shown, in one embodiment, the core-pulling block 400 has a slot 430 and a first connecting hole 440 at one end near the slider 310, and the slider 310 has a block 311 and a second connecting hole (not shown) at one end near the core-pulling block 400. The first connecting hole 440 and the second connecting hole are connected to each other, and the block 311 is disposed in the slot 430. The core-pulling mechanism 10 also includes a plurality of connectors (not shown), which are respectively inserted into the corresponding first connecting hole 440 and second connecting hole.

[0046] like Figure 1 , Figure 4 and Figure 5 As shown, in one embodiment, there are multiple first connecting holes and multiple second connecting holes, and the multiple first connecting holes and multiple second connecting holes are connected in a one-to-one correspondence; there are multiple connectors, and each connector is respectively inserted into the corresponding first connecting hole and second connecting hole.

[0047] Specifically, in this embodiment, the connector is a bolt. Multiple first connecting holes 440 are symmetrically arranged on both sides of the slot 430, and multiple second connecting holes are symmetrically arranged on both sides of the block 311, corresponding one-to-one with the multiple first connecting holes 440. The bolt passes through the first connecting holes 440 and the second connecting holes to achieve a fixed connection between the slider 310 and the core-pulling block 400. It can be understood that the core-pulling block 400 and the slider 310 are fixed by the insertion of the block 311 into the slot 430 and the connection of the connecting member, ensuring a stable connection between the core-pulling block 400 and the slider 310 and preventing the core-pulling block 400 from shifting during movement.

[0048] like Figure 1 and Figure 5 As shown, in one embodiment, the power output end of the hydraulic cylinder 200 is provided with a connector 210, and the end of the slider 310 near the hydraulic cylinder 200 has a snap-fit ​​groove 313, within which the connector 210 is disposed. It can be understood that through the cooperation of the connector 210 and the snap-fit ​​groove 313, the power of the hydraulic cylinder 200 can be directly and efficiently transmitted to the slider 310, thereby reducing power loss. Furthermore, reducing the use of connecting parts helps simplify the assembly process. Further, the snap-fit ​​of the connector 210 within the snap-fit ​​groove 313 prevents the slider 310 from shifting during movement, ensuring smooth movement of the slider 310 and the core-pulling block 400.

[0049] Please see Figures 6 to 7 This disclosure also provides a die-casting mold 20, which includes a fixed mold assembly 21, a moving mold assembly 22, and a core-pulling mechanism 10 as described in any of the above embodiments. The fixed mold assembly 21 and the moving mold assembly 22 form a cavity 23. The moving mold assembly 22 has a mounting groove 24 communicating with the cavity 23, and one end of the core-pulling mechanism 10 is installed in the mounting groove 24.

[0050] In this embodiment, a core-pulling mechanism 10 is provided at a location on the die-casting mold 20 where the clamping force of the fixed mold is high. The pressing protrusion 410 on the core-pulling mechanism 10 applies pressure to the corresponding position on the casting, ensuring that the casting does not stick to the fixed mold when the mold is opened, thus preventing deformation of the die-casting mold 20 and improving casting quality. Furthermore, the core-pulling mechanism 10 has a simple structure, requiring no changes to the mold structure or the addition of mechanisms within the die-casting mold 20, facilitating installation and maintenance and reducing production costs. Simultaneously, the core-pulling mechanism 10 can be adapted to various castings by replacing different specifications of the core-pulling blocks 400, meeting different production needs and improving production flexibility.

[0051] Compared with the prior art, this disclosure has at least the following advantages:

[0052] 1. The core-pulling mechanism features a pressing protrusion at the end of the core-pulling block facing the mold cavity to press against the casting. When the mold closes, the power output end of the hydraulic cylinder extends, causing the core-pulling block, fixed mold assembly, and moving mold assembly to form the mold cavity together. The pressing protrusion extends a certain distance beyond the product position. After the casting is formed, the pressing protrusion presses against the casting without leaving marks on the surface, ensuring the surface quality of the casting. When the mold opens, the power output end of the hydraulic cylinder stops, keeping the core-pulling block stationary. The pressing protrusion forces the casting to remain in the moving mold, preventing deformation caused by adhesion to the fixed mold, which would affect casting quality and production efficiency. After disengaging from the fixed mold, the hydraulic cylinder resets, the core-pulling block disengages from the mold cavity, and the casting is demolded under the action of the moving mold assembly, starting the next production cycle and improving production efficiency.

[0053] 2. The core-pulling mechanism solves the problem of casting sticking to the fixed mold when the casting is opened by pressing the protrusion, thus avoiding leaving marks on the casting and affecting the surface quality of the casting.

[0054] 3. No additional mechanisms are needed in the die-casting mold, the overall structure is simple, easy to manufacture and maintain, and reduces production costs.

[0055] The embodiments described above are merely illustrative of several implementations of this disclosure, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the disclosed patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this disclosure, and these all fall within the protection scope of this disclosure. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A core-pulling mechanism for a die-casting mold, characterized by, The application relates to a die-casting mold core-pulling mechanism. The die-casting mold core-pulling mechanism comprises a support, a hydraulic cylinder, a guide assembly and a core-pulling block. One end of the support is connected with the outer wall of the die-casting mold. The hydraulic cylinder is arranged at the other end of the support. The guide assembly comprises a slider, and one end of the slider is connected with the power output end of the hydraulic cylinder.

2. The core-drawing mechanism of claim 1, wherein The core-pulling block is connected with the power output end of the hydraulic cylinder through the slider.

3. The core-drawing mechanism of claim 1, wherein One end of the core-pulling block is connected with the slider, and the other end of the core-pulling block is inserted into the die-casting mold.

4. The core-drawing mechanism of claim 1, wherein A pressing protrusion is formed at the end of the core-pulling block away from the slider.

5. The core-drawing mechanism of claim 1, wherein The pressing protrusion extends into the cavity and is used for pressing the casting in the cavity.

6. The core-drawing mechanism of claim 1, wherein The core-pulling block and the pressing protrusion are integrally formed. An inclined guide groove is formed at the end of the core-pulling block away from the slider.

7. A core-drawing mechanism according to claim 6, wherein An inclined guide block is arranged on the fixed mold assembly.

8. The core-drawing mechanism of claim 1, wherein A guide inclined surface is arranged at the end of the pressing protrusion away from the slider.

9. A die-casting mold characterized by comprising: A pressing part is formed at the bottom of the pressing protrusion. The pressing part is used for matching the profile of the casting and pressing the casting during mold opening. A clamping groove and a first connecting hole are arranged at the end of the core-pulling block close to the slider. A clamping block and a second connecting hole are arranged at the end of the slider close to the core-pulling block. The first connecting hole and the second connecting hole are in communication. The connecting piece is arranged in the first connecting hole and the second connecting hole. The number of the first connecting holes and the second connecting holes is multiple. The number of the connecting pieces is multiple. A connecting head is arranged at the power output end of the hydraulic cylinder. A clamping groove is arranged at the end of the slider close to the hydraulic cylinder. The connecting head is arranged in the clamping groove. The die-casting mold comprises a fixed mold assembly, a movable mold assembly and the core-pulling mechanism. The fixed mold assembly and the movable mold assembly form a cavity. The movable mold assembly is provided with a mounting groove in communication with the cavity. One end of the core-pulling mechanism is arranged in the mounting groove.

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