Durable cushion transfer mold for flowability evaluation

Abstract

The utility model relates to performance detection technical field discloses a kind of durable buffer die casting mould for fluidity evaluation, comprising: lower mould base, one side is provided with base, and activity cavity is opened on base;Demoulding assembly, including ejector pin plate, and ejector pin plate is movably arranged in activity cavity, and ejector pin plate is provided with ejector pin for ejecting die casting, and die casting is demoulded, and ejector pin penetrates lower mould base;And buffer assembly, multiple are provided, and multiple buffer assemblies are arranged between ejector pin plate and lower mould base, and buffer assembly includes compression piece, and compression piece is arranged on lower mould base, and ejector pin plate extrudes compression piece.The utility model buffer assembly can buffer the demoulding impact force between demoulding assembly and lower mould base, and play the technical effect of protecting demoulding assembly.

Description

Technical Field

[0001] This utility model belongs to the field of performance testing technology, specifically relating to a durable buffer die-casting mold for evaluating fluidity. Background Technology

[0002] Die-cast aluminum alloys, due to their low density, high strength, and good formability, have become core materials for critical structural components in high-end manufacturing. Among these, fluidity and hot cracking resistance are crucial indicators determining the formability of die-cast aluminum alloys. Fluidity directly reflects the alloy's ability to fill the mold cavity; insufficient fluidity can easily lead to defects such as incomplete filling and cold shuts in the casting. Hot cracking resistance reflects the aluminum alloy's ability to resist crack initiation and propagation during solidification and cooling; high hot cracking sensitivity can cause cracking in the casting after demolding or in the early stages of service, severely impacting product reliability. Therefore, precise fluidity and hot cracking resistance testing is necessary for die-cast aluminum alloys to ensure their quality.

[0003] Currently, the fluidity and hot cracking tendency of die-cast aluminum alloys can be evaluated using die-casting molds. These molds typically include an upper mold base and a lower mold base. The lower mold base has an embedded cavity with hot cracking columns. Fluidity is quantitatively characterized by parameters such as the length, uniformity, and time of liquid aluminum alloy filling the cavity, and hot cracking sensitivity is assessed by the crack state of the aluminum alloy in the hot cracking column region. A demolding assembly is located on one side of the lower mold base. This assembly includes a pin plate with ejector pins for pushing the solidified die-casting part out of the cavity. The pin plate drives the ejector pins through the cavity to lift the die-casting part, thus achieving demolding.

[0004] However, during the process of ejecting the pressure column from the cavity by the ejector pin, a demolding impact force is generated between the demolding assembly and the lower mold base. Repeated ejection can easily damage the demolding assembly. Utility Model Content

[0005] To address the shortcomings of the prior art, this invention provides a durable buffer die-casting mold for flowability evaluation. The buffer assembly can act as a buffer between the ejector plate and the lower mold base, improving the problem of damage to the demolding assembly caused by demolding impact.

[0006] The technical effects to be achieved by this utility model are realized through the following technical aspects: This utility model provides a durable buffer die-casting mold for flowability evaluation, comprising: a lower mold base with a base on one side and a movable cavity on the base; a demolding assembly including an ejector plate movably disposed within the movable cavity, the ejector plate having ejector pins for ejecting the die-casting part, the ejector pins penetrating the lower mold base when the die-casting part is demolded; and a buffer assembly, comprising multiple buffer assemblies disposed between the ejector plate and the lower mold base, each buffer assembly including a compression member disposed on the lower mold base, the compression member being compressed by the ejector plate.

[0007] In some implementations, the buffer assembly includes: a fixed sleeve, the compression member disposed within the fixed sleeve; and a pressure column disposed on the ejector plate, the ejector plate driving the pressure column to press into the fixed sleeve, the pressure column squeezing the compression member.

[0008] In some implementations, the fixing sleeve is provided with a guide groove, the pressure column includes a column body, and a guide part is provided on the outer wall of the column body. The guide part is slidably disposed in the guide groove to guide the movement of the pressure column.

[0009] In some implementations, the base is detachably connected to the lower mold base.

[0010] In some implementations, the ejector plate includes an upper plate and a lower plate, which are detachably connected; the ejector pin is disposed on the upper plate, and a connecting hole is provided on the upper plate; the pressure post is detachably connected to the lower plate, and the pressure post passes through the connecting hole.

[0011] In some implementations, a connecting sleeve is provided on the lower plate, the connecting sleeve passes through the connecting hole, and the pressure column passes through the connecting sleeve and is threadedly connected to the connecting sleeve.

[0012] In some implementations, the base includes a limiting portion that extends into the movable cavity, the limiting portion restricting the demolding assembly from disengaging from the movable cavity.

[0013] In some implementations, a positioning structure is provided between the limiting part and the ejector plate to restrict the movement of the ejector plate before demolding.

[0014] In some implementations, the positioning structure includes a positioning post disposed on the limiting portion, and the ejector plate has a positioning hole, with the positioning post passing through the positioning hole to restrict the movement of the ejector plate.

[0015] In some implementations, the buffer components are spaced around the ejector pin.

[0016] In summary, this utility model has at least the following advantages: This utility model provides a durable, buffered die-casting mold for flowability evaluation. After liquid aluminum alloy is die-cast into a die-cast part in the cavity, the ejector plate moves within the movable cavity, driving the ejector pins to penetrate the lower mold base and eject the die-cast part, thus achieving demolding. During demolding, the ejector plate moves closer to the lower mold base, squeezing the compression component. The compression component acts as a buffer between the ejector plate and the lower mold base, effectively reducing the demolding impact force generated by the collision between the ejector plate and the lower mold base. The demolding assembly achieves floating demolding through the buffer component, which facilitates the smooth ejection of the die-cast part from the cavity, protecting the demolding assembly and the lower mold base, and extending the service life of the demolding assembly. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of a durable buffer die-casting mold used for flowability evaluation, as described in a specific embodiment of this utility model.

[0018] Figure 2 This is a schematic diagram of the structure of the base and demolding assembly in a specific embodiment of this utility model.

[0019] Figure 3 for Figure 1 A structural diagram from another angle.

[0020] Figure 4 This is a partial structural diagram of the compression component in a specific embodiment of the present invention.

[0021] Figure 5 This is a partial structural diagram of the pressure column in a specific embodiment of the present invention.

[0022] Figure 6 This is a structural diagram of the positioning structure in a specific embodiment of the present utility model.

[0023] Marked in the image: 1. Lower mold base; 11. Base; 111. Limiting part; 12. Movable cavity; 13. Positioning structure; 131. Positioning pin; 132. Positioning hole; 2. Demolding assembly; 21. Ejector plate; 211. Upper plate; 212. Lower plate; 213. Connecting hole; 214. Connecting sleeve; 22. Ejector pin; 3. Buffer assembly; 31. Compression part; 32. Fixing sleeve; 321. Guide groove; 33. Pressure pin; 331. Column; 332. Guide part; 4. Upper mold base. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. The described embodiments are some, but not all, of the embodiments of this utility model.

[0025] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0026] Example 1: Please see Figure 1 This utility model discloses a durable buffer die-casting mold for evaluating fluidity. It includes a lower mold base 1, specifically, a die-casting cavity is formed on the lower mold base 1. The lower mold base 1 contains a mold cavity within the die-casting cavity, which includes a spiral-shaped runner. Hot cracking columns are provided on the runner. Fluidity is characterized by observing the flow of liquid aluminum alloy within the runner, and hot cracking resistance is assessed by observing the crack state at the hot cracking columns. An upper mold base 4 is provided on the lower mold base 1, and the upper mold base 4 engages with the lower mold base 1. Liquid aluminum alloy is injected into the mold cavity, and the liquid aluminum alloy undergoes fluidity and hot cracking resistance testing.

[0027] Please combine Figure 2 A base 11 is provided on one side of the lower mold base 1, and a movable cavity 12 is provided on the base 11. Specifically, the movable cavity 12 is connected to the mold cavity. A demolding assembly 2 is provided on one side of the lower mold base 1. The demolding assembly 2 ejects the die casting from the mold cavity to achieve demolding. The demolding assembly 2 includes an ejector plate 21, which is movably disposed in the movable cavity 12. The ejector plate 21 is provided with ejector pins 22 for ejecting the die casting. When the die casting is demolded, the ejector pins 22 move up and down with the ejector plate 21. The ejector pins 22 can penetrate the lower mold base 1 into the mold cavity to eject the solidified die casting inside the mold cavity. In some specific embodiments, a demolding hole is provided on the mold cavity. The demolding hole is correspondingly provided with the ejector pin 22. The ejector pin 22 passes through the demolding hole through the lower mold base 1 and is driven by the ejector plate 21 to push the die casting. There are multiple ejector pins 22, which are spaced apart along the gating system.

[0028] Please see Figure 1 and 3Multiple buffer components 3 are provided between the lower mold base 1 and the ejector plate 21. The buffer components 3 include compression members 31, which are disposed on the lower mold base 1. When the ejector plate 21 drives the ejector pin 22 to demold, the ejector plate 21 approaches and squeezes the compression members 31. The compression members 31 can reduce the demolding impact force generated by the collision between the ejector plate 21 and the lower mold base 1. The buffer components 3 play a role in protecting the ejector plate 21 and the ejector pin 22, which is conducive to extending the service life of the demolding components 2.

[0029] Specifically, multiple buffer components 3 are spaced around the ejector pin 22, which helps to ensure the stability of the buffering process, so that the buffer components 3 are subjected to uniform force, and the ejector plate 21 drives the ejector pin 22 to smoothly push out the pressure column.

[0030] Please see Figures 1-3 During the demolding process, the ejector plate 21 moves within the movable cavity 12 and approaches the lower mold base 1. As the ejector plate 21 moves upward, the ejector pin 22 penetrates the lower mold base 1 into the cavity. At the moment when the ejector pin 22 ejects the die casting from the cavity, the ejector plate 21 may collide with the lower mold base 1 at the end of its movement, resulting in a demolding impact force. After multiple demoldings, both the ejector plate 21 and the ejector pin 22 are prone to wear or deformation to varying degrees. By squeezing the compression component 31, the ejector plate 21 can improve the damage caused to the demolding assembly 2 by the impact force between the ejector plate 21 and the lower mold base 1, thus achieving smooth demolding of the die casting.

[0031] Example 2: The difference between this embodiment and Embodiment 1 is that this embodiment further optimizes the structure of the buffer component 3 of this utility model. Please refer to [link / reference]. Figures 3-5 .

[0032] Please see Figure 3 and Figure 4 In this embodiment, the compression member 31 is preferably, but not limited to, a spring. The spring helps to mitigate damage caused by rigid collision between the ejector plate 21 and the lower mold base 1. Specifically, a buffer pad can be provided at the compressed end of the spring to further enhance the buffering effect. The buffer assembly 3 includes a fixed sleeve 32, which is fixedly mounted on the lower mold base 1. The compression member 31 passes through the fixed sleeve 32, which is specifically a circular sleeve.

[0033] Please see Figure 5 The ejector plate 21 is provided with a pressure column 33. During the demolding process, the ejector plate 21 drives the pressure column 33 to press into the fixed sleeve 32. The pressure column 33 squeezes the compressed part 31 in the fixed sleeve 32. The fixed sleeve 32 and the pressure column 33 cooperate to provide guidance and limit the deformation of the compressed part 31, thereby improving the stability of the buffer assembly 3.

[0034] Please see Figure 4 and Figure 5In a preferred embodiment, the fixing sleeve 32 is provided with a guide groove 321, which is specifically an elongated notch formed on the side wall of the fixing sleeve 32. The length direction of the guide groove 321 is the same as the compression direction of the compression member 31. The pressure column 33 includes a column body 331, which compresses the compression member 31. The column body 331 is provided with a guide part 332, which is slidably disposed in the guide groove 321 to guide the movement of the pressure column 33 in compressing the compression member 31, thereby further improving the stability of the buffer assembly 3.

[0035] Example 3: The difference between this embodiment and the above embodiments is that this embodiment makes further structural optimizations to the base 11 and the buffer assembly 3 of this utility model. Please refer to [link / reference]. Figure 3 and Figure 6 .

[0036] The base 11 in this embodiment includes a limiting part 111, which extends into the movable cavity 12. The limiting part 111 restricts the demolding assembly 2 from leaving the movable cavity 12. Specifically, after the ejector plate 21 drives the ejector pin 22 to demold the die-cast part, the ejector plate 21 moves away from the lower mold base 1 in the movable cavity 12 to reset. The limiting part 111 can limit the moving distance of the ejector plate 21.

[0037] In some specific embodiments, a positioning structure 13 is provided between the limiting part 111 and the ejector plate 21 to restrict the movement of the ejector plate 21 before demolding. During the process of liquid aluminum alloy flowing and solidifying in the cavity for flowability and hot cracking tests, the positioning structure 13 ensures relative stability between the ejector plate 21 and the limiting part 111, which helps to reduce the impact of ejector plate 21 movement on the accuracy of test results and also assists in accurate resetting of the ejector plate 21. Specifically, the positioning structure 13 includes a positioning post 131, which is disposed on the limiting part 111. A positioning hole 132 is provided on the ejector plate 21, and the positioning post 131 is adapted to the positioning hole 132. When the positioning post 131 passes through the positioning hole 132, it can restrict the movement of the ejector plate 21 relative to the limiting part 111. In other specific embodiments, the positioning post 131 can be disposed on the ejector plate 21, and the positioning hole 132 can be formed on the limiting part 111.

[0038] In a preferred embodiment, the base 11 is detachably connected to the lower mold base 1. Specifically, the base 11 is provided with an extension plate that extends to the outer wall of the lower mold base 1. The extension plate has a waist-shaped hole, and the lower mold base 1 and the extension plate can be assembled with bolts, which pass through the waist-shaped hole. In other specific embodiments, the base 11 can be directly connected to the lower mold base 1 with bolts. The detachable connection between the base 11 and the lower mold base 1 facilitates the daily maintenance of the buffer assembly 3 and the demolding assembly 2. Further, the ejector plate 21 includes an upper plate 211 and a lower plate 212, which are stacked and detachably connected. Specifically, the upper plate 211 and the lower plate 212 can be connected with bolts. The ejector pin 22 is disposed on the upper plate 211, which has a connecting hole 213. The pressure post 33 is detachably connected to the lower plate 212 and passes through the connecting hole 213. The ejector plate 21 features a split design, allowing for the replacement of the ejector pin 22 and upper plate 211 according to the cavity specifications, thus enabling compatibility with different types of die-casting tests and providing flexibility in use.

[0039] In some specific embodiments, a connecting sleeve 214 is provided on the lower plate 212. The connecting sleeve 214 passes through the connecting hole 213, and the pressure column 33 passes through the connecting sleeve 214 and is threadedly connected to the connecting sleeve 214. Specifically, the outer wall of the pressure column 33 is threadedly connected to the inner wall of the connecting sleeve 214. When disassembling the upper plate 211 and the lower plate 212, the base 11 is first separated from the lower mold base 1, and the pressure column 33 is removed from the connecting sleeve 214. The upper plate 211 and the lower plate 212 can then be separated. The operation is convenient, and the tester can replace the corresponding ejector pin 22 and the upper plate 211 as needed.

[0040] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0041] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0042] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0043] In this invention, unless otherwise expressly specified and limited, "above or below" the first feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on" the first feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the first feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0044] Although the description of this utility model has been given in conjunction with the specific embodiments described above, it is obvious to those skilled in the art that many substitutions, modifications, and variations can be made based on the above description. Therefore, all such substitutions, modifications, and variations are included within the spirit and scope of the appended claims.

Claims

1. A durable buffer die-casting mold for evaluating flowability, characterized in that, include: The lower mold base (1) has a base (11) on one side, and the base (11) has a movable cavity (12). The demolding assembly (2) includes an ejector plate (21) movably disposed within the movable cavity (12). The ejector plate (21) is provided with ejector pins (22) for ejecting the die-cast part. When the die-cast part is demolded, the ejector pins (22) penetrate the lower mold base (1). A buffer assembly (3) is provided in multiple ways. The multiple buffer assemblies (3) are located between the ejector plate (21) and the lower mold base (1). The buffer assembly (3) includes a compression member (31). The compression member (31) is located on the lower mold base (1). The ejector plate (21) squeezes the compression member (31).

2. The durable buffer die-casting mold for flowability evaluation according to claim 1, characterized in that, The buffer component (3) includes: A fixed sleeve (32), wherein the compression member (31) is disposed within the fixed sleeve (32); and A pressure column (33) is provided on the ejector plate (21). The ejector plate (21) drives the pressure column (33) to press into the fixed sleeve (32). The pressure column (33) squeezes the compression member (31).

3. The durable buffer die-casting mold for flowability evaluation according to claim 2, characterized in that, The fixed sleeve (32) is provided with a guide groove (321), and the pressure column (33) includes a column body (331). The outer wall of the column body (331) is provided with a guide part (332). The guide part (332) is slidably disposed in the guide groove (321) to guide the movement of the pressure column (33).

4. The durable buffer die-casting mold for flowability evaluation according to claim 2, characterized in that, The base (11) is detachably connected to the lower mold base (1).

5. The durable buffer die-casting mold for flowability evaluation according to claim 4, characterized in that, The ejector plate (21) includes an upper plate (211) and a lower plate (212), which are detachably connected. The ejector pin (22) is disposed on the upper plate (211), and the upper plate (211) has a connecting hole (213). The pressure column (33) is detachably connected to the lower plate (212), and the pressure column (33) passes through the connecting hole (213).

6. The durable buffer die-casting mold for flowability evaluation according to claim 5, characterized in that, A connecting sleeve (214) is provided on the lower plate (212). The connecting sleeve (214) passes through the connecting hole (213). The pressure column (33) passes through the connecting sleeve (214) and is threadedly connected to the connecting sleeve (214).

7. The durable buffer die-casting mold for flowability evaluation according to claim 1, characterized in that, The base (11) includes a limiting part (111) that extends into the movable cavity (12) and restricts the demolding assembly (2) from disengaging from the movable cavity (12).

8. The durable buffer die-casting mold for flowability evaluation according to claim 7, characterized in that, A positioning structure (13) is provided between the limiting part (111) and the ejector plate (21) to restrict the movement of the ejector plate (21) before demolding.

9. The durable buffer die-casting mold for flowability evaluation according to claim 8, characterized in that, The positioning structure (13) includes a positioning post (131), which is disposed on the limiting part (111). The ejector plate (21) has a positioning hole (132), and the positioning post (131) passes through the positioning hole (132) to restrict the movement of the ejector plate (21).

10. The durable buffer die-casting mold for flowability evaluation according to claim 1, characterized in that, The buffer assembly (3) is spaced around the pin (22).

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