Die-casting die with multi-stage core-pulling structure

Abstract

The utility model relates to the technical field of die-casting dies, and provides a die-casting die with a multistage core-pulling structure, which comprises a fixed die assembly, a movable die assembly, a first core-pulling assembly and a second core-pulling assembly, and the second core-pulling assembly is provided with a second driving piece, an inclined push block, a movable seat, a profiling block and a second core-pulling rod. The axes of output shafts of the first driving piece and the second driving piece are parallel to the end face of the movable die assembly. Compared with the prior art, in the scheme, the axis direction of the second driving part is arranged to be parallel to the end face of the movable mold assembly, and the height difference exists between the axis of the output shaft of the second driving part and the axis of the output shaft of the first driving part in the moving direction of the movable mold assembly; and the difference is converted into inclined movement of the profiling block relative to the movable die assembly by utilizing the inclined push block and the movable seat, so that the whole core-pulling structure is more compact, and the tonnage of a required adaptive die-casting machine is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of die-casting molds, in particular to a die-casting mold with a multi-stage core-pulling structure. Background Art

[0002] Aluminum alloy parts, especially those used in automobiles, are mostly formed using die-casting dies. For structurally complex automotive parts, the corresponding die-casting dies are equally complex. Parts with multiple side holes and undercuts, in particular, require even more complex die-casting core-pulling systems.

[0003] In some existing die-casting mold core-pulling structures, due to the complex product design, an improperly designed core-pulling system can result in the entire die-casting mold being too large, necessitating a larger die-casting machine to match, or sometimes even prohibiting such a match. Consequently, if a larger die-casting machine must be used to mold these products, the molding cost per product will increase significantly. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a die-casting mold with a multi-stage core-pulling structure in view of the current status of the existing technology.

[0005] The technical solution adopted by the utility model to solve the above technical problems is: to propose a die-casting mold with a multi-stage core-pulling structure, comprising: a fixed mold component;

[0006] A movable mold assembly, which is movably matched with the fixed mold assembly;

[0007] a first core pulling assembly, which is disposed on the movable mold assembly and comprises a first driving member and a first core pulling rod, wherein the first driving member is connected to the movable mold assembly, the axis direction of the output shaft of the first driving member is parallel to the end face of the movable mold assembly, and the first core pulling rod is connected to the output end of the first driving member and is movably disposed on the movable mold assembly;

[0008] The second core pulling assembly is arranged on the movable mold assembly and comprises: a second driving member, which is connected to the movable mold assembly, the axis direction of the output shaft of the second driving member is parallel to the end face of the movable mold assembly, and the axis of the output shaft of the second driving member and the axis of the output shaft of the first driving member have a height difference along the moving direction of the movable mold assembly; an oblique push block, one end of which is connected to the output end of the second driving member, and the other end of the oblique push block is provided with a pushing portion arranged at an angle to the axis direction of the output shaft of the second driving member; a movable seat, which is movably arranged in the movable mold assembly, the movable seat is provided with an oblique hole extending therethrough, and the pushing portion is movably inserted into the oblique hole; a profiling block, which is movably connected to the movable mold assembly, and the profiling block is provided with a profiling surface; a second core pulling rod, which is connected to the profiling block and moves synchronously with the profiling block, one end of the second core pulling rod passes through the profiling surface and is exposed to the outside of the movable mold assembly, so as to form a product cavity between the fixed mold assembly, the movable mold assembly, the first core pulling rod, the profiling surface and the second core pulling rod.

[0009] In the above-mentioned die-casting mold with a multi-stage core-pulling structure, the movable mold assembly is provided with an active space, a guide block is provided in the active space, the guide block is provided with a guide groove whose extension direction is parallel to the moving direction of the movable seat, and the outer side wall of the movable seat is provided with a guide part, and the guide groove is movably sleeved on the outer side of the guide part to provide guidance for the movement of the movable seat.

[0010] In the above-mentioned die-casting mold with a multi-stage core-pulling structure, the top wall of the movable seat extends obliquely toward the direction of the fixed mold assembly to form a first limiting portion, and a limiting block is provided on the fixed mold assembly. When the fixed mold assembly abuts against the movable mold assembly, the movable seat can be fixed to the movable mold assembly because the limiting block is inserted into the active space and abuts against the first limiting portion.

[0011] In the above-mentioned die-casting mold with a multi-stage core-pulling structure, the first limiting portion and the end face of the movable seat facing the side of the profiling block jointly form an arc surface structure, and the end of the profiling block facing the movable seat is adapted to the arc surface structure, and the arc surface structure is tightly pressed against the end of the profiling block.

[0012] In the above-mentioned die-casting mold with a multi-stage core-pulling structure, the movable seat is provided with at least two bolt through holes that penetrate its wall thickness, and at least one of the bolt through holes penetrates the inclined hole, the arc surface structure is provided with a plurality of bosses, the profiling block is provided with positioning grooves, and threaded holes corresponding to the bolt through holes one by one, the bosses are inserted in the positioning grooves, and the bolts pass through the bolt through holes and are connected to the threaded holes to fix the profiling block on the movable seat.

[0013] In the above-mentioned die-casting mold with a multi-stage core-pulling structure, a support block is provided on the movable mold assembly, and the support block is pressed against the end of the guide block. A avoidance groove is provided on the support block, and the end of the pushing part is movably inserted in the avoidance groove to provide an avoidance space for the movement of the oblique push block.

[0014] In the above-mentioned die-casting mold with a multi-stage core-pulling structure, a countersunk hole is provided on the profiling block, a locking block is provided at the large end of the countersunk hole, a mounting groove is provided on the movable seat, a second limiting portion is provided at the end of the second core-pulling rod, the second core-pulling rod is connected between the locking block and the countersunk hole, and the second limiting portion is tightly pressed against the locking block, and one end of the locking block faces the mounting groove.

[0015] In the above-mentioned die-casting mold with a multi-stage core-pulling structure, a pressing block is provided in the movable space, and one side surface of the pressing block movably abuts against the end surface of the oblique push block to provide guidance for the movement of the oblique push block.

[0016] Compared with the prior art, in this solution, by setting the axial direction of the second driving member to be parallel to the end face of the movable mold assembly, and making the output shaft axis of the second driving member and the output shaft axis of the first driving member have a height difference in the moving direction of the movable mold assembly, and then using the inclined push block and the moving seat to convert this difference into an inclined movement of the profiling block relative to the movable mold assembly, the entire core pulling structure is made more compact and the tonnage of the required adapted die-casting machine is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a three-dimensional diagram of a die-casting mold product with a multi-stage core-pulling structure of the utility model;

[0018] Figure 2 This is a three-dimensional diagram of a die-casting mold with a multi-stage core-pulling structure of the utility model;

[0019] Figure 3 yes Figure 2 A partial cross-sectional view of

[0020] Figure 4 yes Figure 1 The three-dimensional image after removing the fixed mold assembly;

[0021] Figure 5 It is a partial cross-sectional view of the second core pulling assembly;

[0022] Figure 6 It is a three-dimensional diagram of the mobile seat;

[0023] Figure 7 It is a three-dimensional diagram of the contour block.

[0024] In the figure, 1, first through hole; 2, second through hole; 3, third through hole; 4, fixed mold assembly; 5, movable mold assembly; 6, first core-pulling assembly; 7, first driving member; 8, first core-pulling rod; 9, second core-pulling assembly; 10, second driving member; 11, oblique push block; 12, pushing part; 13, moving seat; 14, oblique hole; 15, contour block; 16, second core-pulling rod; 17, guide block; 18, guide groove; 19, guide part; 20, first limiting part; 21, limiting block; 22, arc surface structure; 23, bolt through hole; 24, boss; 25, positioning groove; 26, support block; 27, avoidance groove; 28, countersunk hole; 29, locking block; 30, mounting groove; 31, second limiting part; 32, pressing block. DETAILED DESCRIPTION

[0025] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0026] A die-casting mold with a multi-stage core-pulling structure comprises: a fixed mold assembly 4;

[0027] The movable mold assembly 5 is movably matched with the fixed mold assembly 4;

[0028] A first core pulling assembly 6 is provided on the movable mold assembly 5 and comprises a first driving member 7 and a first core pulling rod 8. The first driving member 7 is connected to the movable mold assembly 5. The axis direction of the output shaft of the first driving member 7 is parallel to the end face of the movable mold assembly 5. The first core pulling rod 8 is connected to the output end of the first driving member 7 and is movably provided on the movable mold assembly 5.

[0029] The second core pulling assembly 9 is arranged on the movable mold assembly 5 and comprises: a second driving member 10, which is connected to the movable mold assembly 5, the axial direction of the output shaft of the second driving member 10 is parallel to the end face of the movable mold assembly 5, and the axis of the output shaft of the second driving member 10 and the axis of the output shaft of the first driving member 7 have a height difference along the moving direction of the movable mold assembly 5; an oblique push block 11, one end of which is connected to the output end of the second driving member 10, and the other end of the oblique push block 11 is provided with a pushing portion 12 arranged at an angle to the axial direction of the output shaft of the second driving member 10; The seat 13 is movably arranged in the movable mold assembly 5, and a penetrating oblique hole 14 is provided on the movable seat 13, and the pushing part 12 is movably inserted in the oblique hole 14; the profiling block 15 is movably connected in the movable mold assembly 5, and a profiling surface is provided on the profiling block 15; the second core pulling rod 16 is connected to the profiling block 15 and moves synchronously with the profiling block 15, one end of the second core pulling rod 16 passes through the profiling surface and is exposed to the outside of the movable mold assembly 5, so as to form a product cavity between the fixed mold assembly 4, the movable mold assembly 5, the first core pulling rod 8, the profiling surface and the second core pulling rod 16.

[0030] Based on the above embodiment, an exemplary structure of this solution is as follows Figures 1 to 7 shown. Figure 1 This is a three-dimensional view of a product cavity forming workpiece, which has a first through-hole 1 and a second through-hole 2 located in the same plane and intersecting each other, as well as a third through-hole 3 for connecting to other components. In this solution, there are four first core pulling assemblies 6, distributed on the four sides of the movable mold assembly 5. Two sets of first core pulling assemblies 6 are arranged opposite each other, respectively forming the first through-hole 1 and the second through-hole 2, while the second core pulling assembly 9 is used to form the third through-hole 3.

[0031] During operation, the fixed die assembly 4 and the movable die assembly 5 are fixed to the fixed part and the movable part of the die casting machine respectively. The movable part of the die casting machine drives the movable die assembly 5 to move closer to or away from the fixed die assembly 4 to realize the closing and opening of the die casting mold. Figure 3 and Figure 5 As shown, when the die casting mold is in the mold closing state, the first core pulling rod 8 and the second core pulling rod 16 are inserted into the product cavity. After the movable mold assembly 5 is separated from the fixed mold assembly 4, the second driving member 10 drives the inclined push block 11 along the Figure 5 As shown, the oblique push block 11 moves, and its pushing portion 12 acts on the oblique hole 14, thereby driving the moving seat 13 along the oblique hole 14. Figure 5 As shown, the movable seat 13 moves obliquely from the upper left to the lower right. As the movable seat 13 moves, the profiling block 15 and the second core pulling rod 16 are separated from the workpiece. Subsequently, the first driving member 7 drives the first core pulling rod 8 to separate from the workpiece, completing the core pulling operation of the workpiece.

[0032] Given the considerable complexity of the core-pulling structure, if it were conventionally configured such that the axial direction of the second driving member 10 was parallel to the direction of the second core-pulling rod 16, i.e., the second driving member 10 was tilted on the movable die assembly 5, the core-pulling structure would be bulky, occupying excessive space and correspondingly increasing the required tonnage of the die-casting machine. In this solution, however, by configuring the axial direction of the second driving member 10 to be parallel to the end face of the movable die assembly 5, and by creating a height difference between the output shaft axis of the second driving member 10 and the output shaft axis of the first driving member 7 in the direction of movement of the movable die assembly 5, and then utilizing the inclined push block 11 and the movable seat 13 to convert this height difference into the tilted movement of the profiling block 15 relative to the movable die assembly 5, the entire core-pulling structure is made more compact, reducing the required tonnage of the die-casting machine.

[0033] Preferably, the first driving member 7 and the second driving member 10 are both oil cylinders.

[0034] The movable mold assembly 5 is provided with an active space, in which a guide block 17 is provided. The guide block 17 is provided with a guide groove 18 whose extension direction is parallel to the moving direction of the movable seat 13. The outer wall of the movable seat 13 is provided with a guide portion 19. The guide groove 18 is movably sleeved on the outer side of the guide portion 19 to provide guidance for the movement of the movable seat 13.

[0035] When the movable seat 13 moves obliquely driven by the oblique push block 11 , the guide groove 18 is always sleeved on the outside of the guide portion 19 and moves synchronously with the movable seat 13 , thereby guiding the moving direction of the movable seat 13 .

[0036] The top wall of the movable seat 13 extends obliquely toward the fixed mold assembly 4 to form a first limit portion 20. The fixed mold assembly 4 is provided with a limit block 21. When the fixed mold assembly 4 and the movable mold assembly 5 abut, the movable seat 13 can be fixed to the movable mold assembly by inserting the limit block 21 into the movable space and abutting against the first limit portion 20.

[0037] After the fixed die assembly 4 and the movable die assembly 5 have abutted against each other and the die-casting mold has closed, the die-casting machine begins injecting material into the product cavity. The pressure during injection, as well as the thrust exerted on the contour block 15 by the material flowing within the cavity, can cause the contour block 15 to shift on the movable die assembly 5, thereby affecting the die-casting accuracy of the workpiece. To address this issue, this solution incorporates a stop block 21 on the fixed die assembly 4. This stop block 21 maintains close contact with the first stop portion 20 when the die-casting mold is closed, effectively limiting the movement of the contour block 15 on the movable die assembly 5 and ensuring die-casting accuracy.

[0038] The first limiting portion 20 and the end surface of the movable seat 13 facing the profiling block 15 together form an arc structure 22. The end of the profiling block 15 facing the movable seat 13 is adapted to the arc structure 22, and the arc structure 22 is tightly pressed against the end of the profiling block 15.

[0039] The arc surface structure 22 is used to increase the contact area between the profiling block 15 and the movable seat 13, so that more connection structures can be set between the profiling block 15 and the movable seat 13, and finally the connection between the profiling block 15 and the movable seat 13 is more firm.

[0040] The movable seat 13 is provided with at least two bolt through holes 23 that penetrate the wall thickness thereof, and at least one of the bolt through holes 23 penetrates the inclined hole 14. A plurality of bosses 24 are provided on the arc surface structure 22. The profiling block 15 is provided with a positioning groove 25 and threaded holes corresponding one to one with the bolt through holes 23. The bosses 24 are inserted into the positioning grooves 25 to provide positioning for the connection between the profiling block 15 and the movable seat 13. The bolts pass through the bolt through holes 23 and are connected to the threaded holes to fix the profiling block 15 on the movable seat 13.

[0041] A support block 26 is provided on the movable mold assembly 5, and the support block 26 is pressed against the end of the guide block 17 to provide support for the installation of the guide block 17 in the movable space. A avoidance groove 27 is provided on the support block 26, and the end of the pushing part 12 is movably inserted in the avoidance groove 27 to provide an avoidance space for the movement of the oblique push block 11.

[0042] A countersunk hole 28 is provided on the profiling block 15, and a locking block 29 is provided at the large end of the countersunk hole 28. A mounting groove 30 is provided on the movable seat 13. A second limiting portion 31 is provided at the end of the second pulling rod 16. The second pulling rod 16 is connected between the locking block 29 and the countersunk hole 28, and the second limiting portion 31 is tightly pressed against the locking block 29, with one end of the locking block 29 facing the mounting groove 30.

[0043] The countersunk hole 28 is used to realize the installation of the second pulling rod 16 on the profiling block 15, the locking block 29 and the second limiting portion 31 are used to fix the pulling rod on the profiling block 15, and the installation groove 30 is used to facilitate the fixing of the locking block 29 on the profiling block 15.

[0044] A pressing block 32 is provided in the movable space, and one side surface of the pressing block 32 movably abuts against the end surface of the oblique push block 11 to provide guidance for the movement of the oblique push block 11, thereby ensuring the moving direction of the oblique push block 11.

[0045] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship and movement status of the various components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0046] In addition, terms such as "first," "second," and "an" in this utility model are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two or three, unless otherwise specifically defined.

[0047] In this utility model, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0048] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0049] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described, or replace them with similar methods, without departing from the scope defined by the spirit of the present invention.

Claims

1. A die-casting mold with a multi-stage core-pulling structure, characterized in that: include: Fixed mold assembly; A movable mold assembly, which is movably matched with the fixed mold assembly; a first core pulling assembly, which is disposed on the movable mold assembly and comprises a first driving member and a first core pulling rod, wherein the first driving member is connected to the movable mold assembly, the axis direction of the output shaft of the first driving member is parallel to the end face of the movable mold assembly, and the first core pulling rod is connected to the output end of the first driving member and is movably disposed on the movable mold assembly; The second core pulling assembly is arranged on the movable mold assembly and comprises: a second driving member, which is connected to the movable mold assembly, the axis direction of the output shaft of the second driving member is parallel to the end face of the movable mold assembly, and the axis of the output shaft of the second driving member and the axis of the output shaft of the first driving member have a height difference along the moving direction of the movable mold assembly; an oblique push block, one end of which is connected to the output end of the second driving member, and the other end of the oblique push block is provided with a pushing portion arranged at an angle to the axis direction of the output shaft of the second driving member; a movable seat, which is movably arranged in the movable mold assembly, the movable seat is provided with an oblique hole extending therethrough, and the pushing portion is movably inserted into the oblique hole; a profiling block, which is movably connected to the movable mold assembly, and the profiling block is provided with a profiling surface; a second core pulling rod, which is connected to the profiling block and moves synchronously with the profiling block, one end of the second core pulling rod passes through the profiling surface and is exposed to the outside of the movable mold assembly, so as to form a product cavity between the fixed mold assembly, the movable mold assembly, the first core pulling rod, the profiling surface and the second core pulling rod.

2. The die-casting mold with a multi-stage core-pulling structure according to claim 1, characterized in that: The movable mold assembly is provided with an active space, a guide block is provided in the active space, the guide block is provided with a guide groove whose extension direction is parallel to the moving direction of the movable seat, and a guide part is provided on the outer side wall of the movable seat. The guide groove is movably sleeved on the outer side of the guide part to provide guidance for the movement of the movable seat.

3. The die-casting mold with a multi-stage core-pulling structure according to claim 2, characterized in that: The top wall of the movable seat extends obliquely toward the fixed mold assembly to form a first limiting portion. The fixed mold assembly is provided with a limiting block. When the fixed mold assembly abuts against the movable mold assembly, the movable seat can be fixed to the movable mold assembly by inserting the limiting block into the movable space and abutting against the first limiting portion.

4. The die-casting mold with a multi-stage core-pulling structure according to claim 3, characterized in that: The first limiting portion and the end surface of the movable seat facing the profiling block together form an arc surface structure, one end of the profiling block facing the movable seat is adapted to the arc surface structure, and the arc surface structure is tightly pressed against the end of the profiling block.

5. The die-casting mold with a multi-stage core-pulling structure according to claim 4, characterized in that: The movable seat is provided with at least two bolt through holes that penetrate the wall thickness thereof, and at least one of the bolt through holes penetrates the inclined hole. The arc surface structure is provided with a plurality of bosses. The profiling block is provided with positioning grooves and threaded holes corresponding to the bolt through holes one by one. The bosses are inserted into the positioning grooves, and the bolts pass through the bolt through holes and are connected to the threaded holes to fix the profiling block on the movable seat.

6. The die-casting mold with a multi-stage core-pulling structure according to claim 2, characterized in that: A support block is provided on the movable mold assembly, and the support block is pressed against the end of the guide block. A avoidance groove is provided on the support block, and the end of the pushing part is movably inserted in the avoidance groove to provide avoidance space for the movement of the oblique push block.

7. The die-casting mold with a multi-stage core-pulling structure according to claim 1, characterized in that: A countersunk hole is provided on the profiling block, a locking block is provided at the large end of the countersunk hole, a mounting groove is provided on the movable seat, a second limiting portion is provided at the end of the second core-pulling rod, the second core-pulling rod is connected between the locking block and the countersunk hole, and the second limiting portion is tightly pressed against the locking block, and one end of the locking block faces the mounting groove.

8. The die-casting mold with a multi-stage core-pulling structure according to claim 2, characterized in that: A pressing block is provided in the movable space, and one side surface of the pressing block movably abuts against the end surface of the oblique push block to provide a guide for the movement of the oblique push block.

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