A slide locking mechanism of a die-casting mold

Abstract

The utility model discloses a slider locking mechanism of die casting die, including the die body, the die body has the core pulling side and non core pulling side of opposite setting in it, and the slider assembly is movably provided with in the core pulling side, and the slider assembly is locked through the first locking assembly of setting in the core pulling side under the die closing state. But the second locking assembly is additionally arranged in the non core pulling side, and the second locking assembly is independently locked when closing the die, and the locking force that it provides and the locking force that the first locking assembly provides constitute a pair of equal size, opposite direction balanced force system, and the bidirectional balanced locking of slider assembly is realized in cooperation. The advantage lies in: through additionally arranging the second locking assembly in the non core pulling side, and the symmetrical force system is formed with the first locking assembly, and the eccentric moment of slider inclination and one side stress concentration are fundamentally eliminated, and the locking load is shared by two independent units, and the die fatigue life can be significantly prolonged, and the rigidity of slider system is enhanced through the cooperation of both sides, and the elastic deformation and micro motion are effectively inhibited, and the product size precision is ensured.

Description

Technical Field

[0001] This utility model relates to the field of die casting mold technology, and in particular to a slider locking mechanism for die casting molds. Background Technology

[0002] Die-casting molds are key equipment for producing die-cast parts from metals such as aluminum alloys and zinc alloys. For the production of complex die-cast parts with side holes, grooves, or undercut structures, the mold must be equipped with a lateral core-pulling slider mechanism. When high-pressure molten metal is injected into the mold with the mold closed, the enormous injection pressure is transmitted through the cavity, generating a huge lateral thrust on the slider. Therefore, to prevent the slider from retracting during injection and to avoid flash, dimensional errors, or even mold damage, a reliable slider locking mechanism is necessary.

[0003] Currently, the most common slider locking method is basically a wedge-type single-sided locking. Its basic structure is as follows: a locking block with an inclined surface is set on the fixed mold side or moving mold side of the mold. In the mold-closed state, the inclined surface of this locking block presses against the inclined surface fixed on the slider or the inclined surface on the slider body. The self-locking principle of the inclined surface generates a positive pressure perpendicular to the inclined surface direction. The horizontal component of this positive pressure resists the injection pressure, thereby achieving slider locking. Although the above locking structure is widely used, its inherent technical defects are becoming increasingly prominent in modern die-casting production processes involving high pressure, high speed, and high precision: First, since the locking block is only arranged on one side of the slider (usually the non-forming surface side), the locking force acts entirely on one side of the slider. Therefore, under extremely high injection pressure, the slider is subjected to a lateral locking force concentrated on the non-forming surface and an injection pressure acting in the opposite direction on the entire forming surface. This force distribution is equivalent to applying an eccentric torque to the slider, which can easily cause a slight tilting of the slider within the locking plane, thus affecting the slider's interaction with the core and the slider's interaction with the mold. Changes in the fit clearance between cavities can lead to dimensional instability in die castings, the formation of burrs and flash, and affect the manufacturing quality of the die castings. Secondly, in this locking structure, the locking force is concentrated on a narrow, inclined contact band. When the mold is repeatedly subjected to periodic high-pressure impacts, severe stress concentration will occur at the edge of the contact band, especially in the area where the inclined surface of the locking block transitions at a right angle to the root. This makes it very easy for fatigue cracks to form here, which will gradually propagate and eventually lead to the root of the locking block breaking or the inclined surface being severely crushed and deformed. Repairing this requires replacing the entire locking block and even repairing the corresponding mounting groove on the mold frame, which is costly and time-consuming.

[0004] To address these issues, conventional solutions include increasing the material thickness of the locking block to improve its bending strength, or using higher-grade hot work die steel (such as H13) and undergoing deeper surface hardening treatment. However, these solutions do not change the fundamental mechanical defect of "unilateral force," cannot eliminate the torque and stress concentration problems caused by slider tilting at the source, and significantly increase the material cost of the die. Summary of the Invention

[0005] The technical problem to be solved by this utility model is to provide a slider locking mechanism for die casting molds that is simple in structure, has stable and reliable locking, can effectively prevent slider tilting and significantly improve the overall service life.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: A slider locking mechanism for a die-casting mold includes a mold body with a core-pulling side and a non-core-pulling side disposed opposite to each other. A slider assembly is movably disposed on the core-pulling side. In the mold-closed state, the slider assembly is locked by a first locking assembly disposed on the core-pulling side. A second locking assembly is disposed on the non-core-pulling side. In the mold-closed state, the second locking assembly locks independently. The locking force provided by the second locking assembly and the locking force provided by the first locking assembly on the slider assembly form a pair of equal and opposite balanced force systems on the slider assembly, thereby achieving bidirectional balanced locking of the slider assembly.

[0007] The mold body includes a fixed mold frame and a moving mold frame. After the fixed mold frame and the moving mold frame are closed, a cavity is formed. The slider assembly includes a slider and a slider seat connected to the rear end of the slider. The slider extends into the cavity.

[0008] The slider seat has a locking part, the locking part has a first locking slope, the first locking component includes a first locking block, the first locking block is provided with a second locking slope that matches the slope of the first locking slope, in the mold closed state, the first locking slope and the second locking slope are pressed together to achieve locking.

[0009] The first locking block is disposed on the fixed mold frame.

[0010] The second locking assembly includes a locking seat and a second locking block. The locking seat has a third locking inclined surface, and the second locking block is provided with a fourth locking inclined surface that matches the inclination of the third locking inclined surface. The second locking inclined surface and the fourth locking inclined surface have the same inclination angle in opposite directions. In the mold-closed state, the third locking inclined surface and the fourth locking inclined surface are pressed together to achieve locking.

[0011] In the mold-closed state, the locking part and the locking seat are disposed between the first locking block and the second locking block.

[0012] The locking seat has a base, and a groove is recessed on the end face of the base opposite to the first locking block at the locking and pressing position of the second locking block. A pressure block is detachably disposed in the groove, and the pressure block is provided with the third locking inclined surface.

[0013] The locking seat is disposed on the moving mold frame, and the second locking block is disposed on the fixed mold frame.

[0014] Compared with the prior art, the advantages of this utility model are as follows: The structure is simple. By adding a second locking component to the non-core-pulling side of the mold body, a symmetrical force couple is formed with the original first locking component, eliminating the eccentric torque that causes slider tilting and unilateral stress concentration. The second locking component, as an independent mechanical unit, shares the locking load with the first locking component, distributing the locking force to two independent areas. This significantly alleviates stress concentration at the root of the traditional locking block, effectively extending fatigue life. Through the synergistic effect of the first and second locking components, the overall rigidity of the slider assembly under high pressure is effectively enhanced, effectively suppressing elastic deformation and fretting in any direction, thus ensuring the product's molding dimensions and avoiding the generation of flash and burrs. Attached Figure Description

[0015] Figure 1 This is a schematic cross-sectional view of the overall structure of this utility model; Figure 2 This is a three-dimensional structural diagram of the second locking component in this utility model; Figure 3 This is an exploded structural diagram of the second locking component in this utility model; Figure 4 This is a three-dimensional structural diagram of the slider assembly and the first locking block in this utility model. Detailed Implementation

[0016] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0017] As shown in the figure, a slider locking mechanism for a die-casting mold includes a mold body 1. The mold body 1 has a core-pulling side and a non-core-pulling side arranged opposite to each other. A slider assembly 2 is movably arranged on the core-pulling side. The slider assembly 2 is locked by a first locking component arranged on the core-pulling side when the mold is closed. A second locking component is arranged on the non-core-pulling side. When the mold is closed, the second locking component locks independently. The locking force provided by the second locking component and the locking force provided by the first locking component on the slider assembly 2 form a pair of equal and opposite balanced force systems on the slider assembly 2, thereby achieving bidirectional balanced locking of the slider assembly 2.

[0018] In this specific embodiment, the mold body 1 includes a fixed mold frame 11 and a moving mold frame 12. After the fixed mold frame 11 and the moving mold frame 12 are closed, a cavity 13 is formed. The slider assembly 2 includes a slider 21 and a slider seat 22 connected to the rear end of the slider 21. The slider 21 extends into the cavity 13.

[0019] In this specific embodiment, the slider seat 22 has a locking part 221, which has a first locking inclined surface 2211. The first locking assembly includes a first locking block 3, on which a second locking inclined surface 31 is provided that matches the slope of the first locking inclined surface 2211. In the mold-closed state, the first locking inclined surface 2211 and the second locking inclined surface 31 are pressed together to achieve locking. Utilizing the wedge locking principle, a self-locking force is generated by the pressing of the two mating inclined surfaces. This structure is simple and ensures a stable locking function.

[0020] In this specific embodiment, the first locking block 3 is detachably mounted on the fixed mold frame 11. The fixed mold frame 11 provides a stable mounting base for the first locking block 3. The first locking block is a vulnerable component, and it is mounted on the fixed mold frame 11 in a detachable manner. When the inclined surface is worn, crushed, or cracked, the first locking block 3 can be removed and replaced or repaired without any processing or destructive disassembly of the expensive and complex fixed mold frame 11, thus reducing maintenance costs and repair time.

[0021] In this specific embodiment, the second locking assembly includes a locking seat 4 and a second locking block 5. The locking seat 4 has a third locking inclined surface 41, and the second locking block 5 is provided with a fourth locking inclined surface 51 that matches the inclination of the third locking inclined surface 41. The second locking inclined surface 31 and the fourth locking inclined surface 51 have equal inclination angles in opposite directions. In the mold-closed state, the third locking inclined surface 41 and the fourth locking inclined surface 51 are pressed together to achieve locking. The locking seat 4 and the second locking block 5 constitute a complete and independent locking functional module, whose locking action is independent of the first locking assembly. At the same time, the second locking inclined surface 31 and the fourth locking inclined surface 51 have equal inclination angles but opposite directions, ensuring that the locking force provided by the second locking assembly is equal in magnitude and opposite in direction to the locking force provided by the first locking assembly in the horizontal component. This is the key to forming a balanced force system.

[0022] In this specific embodiment, in the mold-closed state, the locking part 221 and the locking seat 4 are disposed between the first locking block 3 and the second locking block 5. This arrangement directly ensures the shortest force transmission path, the most direct constraint, and the maximum stiffness.

[0023] In this specific embodiment, the locking seat 4 has a base 40. On the end face of the base 40 opposite to the first locking block 3, a groove 401 is recessed at the locking and pressing position of the second locking block 5. A pressure block 42 is detachably disposed in the groove 401, and a third locking inclined surface 41 is provided on the pressure block 42. When the third locking inclined surface 41 is worn, it is not necessary to replace the entire locking seat 4 or perform complex on-site repairs. Only the pressure block 42 needs to be disassembled and replaced, which greatly reduces maintenance costs, shortens downtime, and improves the availability of the mold.

[0024] In this specific embodiment, the locking seat 4 is detachably mounted on the moving mold frame 12, and the second locking block 5 is detachably mounted on the fixed mold frame 11. This facilitates the replacement of the aforementioned components after wear, simplifies maintenance, and reduces costs.

Claims

1. A slider locking mechanism for a die-casting mold, comprising a mold body, wherein the mold body has a core-pulling side and a non-core-pulling side disposed opposite to each other, a slider assembly movably disposed on the core-pulling side, the slider assembly being locked by a first locking assembly disposed on the core-pulling side in the mold-closed state, characterized in that... The non-core-pulling side is provided with a second locking component. In the mold-closed state, the second locking component locks independently. The locking force provided by the second locking component and the locking force provided by the first locking component on the slider component form a pair of equal and opposite balanced force systems on the slider component, thereby working together to achieve bidirectional balanced locking of the slider component.

2. The slider locking mechanism of a die-casting mold as described in claim 1, characterized in that... The mold body includes a fixed mold frame and a moving mold frame. After the fixed mold frame and the moving mold frame are closed, a cavity is formed. The slider assembly includes a slider and a slider seat connected to the rear end of the slider. The slider extends into the cavity.

3. The slider locking mechanism of a die-casting mold as described in claim 2, characterized in that... The slider seat has a locking part, the locking part has a first locking slope, the first locking component includes a first locking block, the first locking block is provided with a second locking slope that matches the slope of the first locking slope, in the mold closed state, the first locking slope and the second locking slope are pressed together to achieve locking.

4. The slider locking mechanism of a die-casting mold as described in claim 3, characterized in that... The second locking assembly includes a locking seat and a second locking block. The locking seat has a third locking inclined surface, and the second locking block is provided with a fourth locking inclined surface that matches the inclination of the third locking inclined surface. The second locking inclined surface and the fourth locking inclined surface have the same inclination angle in opposite directions. In the mold-closed state, the third locking inclined surface and the fourth locking inclined surface are pressed together to achieve locking.

5. The slider locking mechanism of a die-casting mold as described in claim 4, characterized in that... In the mold-closed state, the locking part and the locking seat are disposed between the first locking block and the second locking block.

6. The slider locking mechanism of a die-casting mold as described in claim 4, characterized in that... The locking seat has a base, and a groove is recessed on the end face of the base opposite to the first locking block at the locking and pressing position of the second locking block. A pressure block is detachably disposed in the groove, and the pressure block is provided with the third locking inclined surface.

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