A thin-walled super-long parallel plate structure casting mold

Abstract

The utility model discloses a kind of thin-wall super-long parallel plate structure casting mould, it is related to casting mould technical field, including upper mould and lower mould being set up corresponding in up and down, the top surface of lower mould is provided with at least two die cavities, die cavity is all in geometry symmetry distribution in front-back direction and left-right direction, the bottom surface of upper mould is equipped with the modeling module matched with die cavity, casting pouring cavity is formed between modeling module and die cavity, casting pouring cavity is all communicated with and is equipped with pouring pipe, pouring pipe penetrates and projects lower mould, the contact area of modeling module and die cavity inner wall is all reserved 0.03-0.05mm assembly gap, lower mould is symmetrically penetrated and is provided with through groove below casting pouring cavity, through groove is all equipped with vibration motor below casting pouring cavity.The utility model is simple in structure, convenient to use, effectively improve the production efficiency and forming quality of casting.

Description

Technical Field

[0001] This utility model relates to the field of casting mold technology, and more specifically, to a thin-walled, ultra-long parallel plate structure casting mold. Background Technology

[0002] Thin-walled, ultra-long parallel plate structure castings are widely used in aerospace, rail transportation, and large equipment manufacturing due to their light weight, high strength, and excellent heat dissipation. However, the thin walls, long length, and high parallelism requirements of these castings present significant technical challenges in mold forming and casting processes, mainly in the following aspects: First, the molding process is difficult: the mold cavity for this type of casting has a large volume, and air is easily left inside the cavity after the mold is closed. At the same time, the volatilization of the foaming agent during the die casting process will generate a large amount of gas. If these gases cannot be discharged in time, they can easily form air resistance inside the cavity, preventing the molten material from fully filling the thin-walled area, resulting in problems such as local incomplete forming of the casting, surface defects, or internal porosity.

[0003] Secondly, dimensional accuracy is difficult to guarantee: due to the thin walls and long overall length of these castings, they are susceptible to deformation under thermal stress during mold fixing under high temperature and high pressure conditions, such as bulging in the middle or sinking at both ends. This thermal deformation reduces the geometric accuracy of the casting, which may cause the product to fail to meet the usage requirements.

[0004] Secondly, production efficiency is low: traditional casting molds can usually only form one casting at a time, and the mold parameters often need to be adjusted multiple times during the die casting process to solve problems such as poor filling or difficulty in demolding, resulting in low production efficiency and difficulty in meeting the needs of mass production and large-scale production.

[0005] In addition, demolding is difficult: these castings have strong integrity and large surface area. During the demolding process, the adhesion between the casting and the mold is large, which can easily lead to poor demolding, sticking, or scratches, affecting the yield and surface quality of the castings.

[0006] In the prior art, utility model patent CN221620766U discloses a "casting mold for large thin-walled structural parts," including an upper mold, a lower mold, and a sprue plate. It solves the problem of poor filling by setting multiple sprues for multi-point feeding. Furthermore, this solution utilizes the sprues and the metal support formed by solidification within the cavity to enhance the shape stability of the casting during heat treatment and reduce deformation. However, this solution still suffers from problems such as complex mold structure, high manufacturing cost, and the need for subsequent removal of the metal support. Additionally, uneven temperature distribution within the cavity can easily affect the stability of the casting quality.

[0007] Therefore, we propose a thin-walled, ultra-long parallel plate structure casting mold to solve the above-mentioned technical problems. Utility Model Content

[0008] In order to solve the technical problems existing in the prior art, this utility model proposes a thin-walled ultra-long parallel plate structure casting mold.

[0009] This utility model is achieved through the following technical solution: A thin-walled, ultra-long parallel plate structure casting mold includes an upper mold and a lower mold arranged opposite each other. The top surface of the lower mold has at least two cavities, which are geometrically symmetrically distributed in both the front-back and left-right directions. The bottom surface of the upper mold has a molding module that mates with the cavity. The molding module and the cavity form a casting pouring cavity. Each casting pouring cavity is connected to a pouring pipe that extends through and out of the lower mold. A 0.03-0.05mm assembly gap is reserved in the contact area between the molding module and the inner wall of the cavity. The lower mold has symmetrical through slots below the casting pouring cavity, and each through slot is equipped with a vibration motor below the casting pouring cavity.

[0010] In a further technical solution, the lower mold is provided with curved venting grooves at the top edge of the mold cavity.

[0011] In a further technical solution, the bottom surface of the upper mold is provided with heat dissipation ribs that cover and fit the top surface of the casting cavity.

[0012] In a further technical solution, a micro gap of 0.03-0.05mm is reserved in the contact area between the heat dissipation fins and the inner wall of the mold cavity.

[0013] In a further technical solution, the bottom surface of the upper mold is provided with a plurality of positioning pins, and the top surface of the lower mold is provided with a plurality of positioning grooves that cooperate with the positioning pins.

[0014] In a further technical solution, a rubber sleeve is provided inside the positioning groove.

[0015] In a further technical solution, the outer circumference of the top surface of the upper mold is integrally formed with an ejector portion, and the outer circumference of the bottom surface of the lower mold is integrally formed with a clamping portion.

[0016] In a further technical solution, the surfaces of the mold cavity and the shaping module are treated with a nano-coating.

[0017] The technical solution of this utility model has at least the following beneficial effects: 1. The mold cavity of this utility model adopts a geometrically symmetrical distribution in the front-to-back and left-to-right directions. This not only ensures that the mold is subjected to uniform force when the mold is closed, effectively avoiding mold displacement caused by local stress concentration, but also allows the molten material to be filled more evenly, reducing dimensional deviations from the source and ensuring the quality of casting.

[0018] 2. This utility model reserves an assembly gap of 0.03-0.05mm in the contact area between the molding module and the inner wall of the mold cavity as an exhaust channel. Combined with the curved exhaust groove opened at the edge of the top surface of the mold cavity and the vibration motor on the through groove, it not only achieves efficient exhaust and reduces the risk of air resistance inside the mold, but also effectively ensures that the molten material fully fills the thin-walled area, solving problems such as local incomplete forming of castings, surface defects or internal porosity.

[0019] 3. This utility model has a simple structure, is easy to use and has low manufacturing cost. Through the multi-cavity design, multiple castings can be formed in one step, which greatly improves production efficiency and meets the needs of mass production and large-scale production.

[0020] 4. This utility model accelerates the heat conduction of molten material during solidification by using heat dissipation fins, which can shorten the cooling time, balance the temperature distribution of the casting, reduce the impact of thermal stress caused by temperature gradient on the casting, effectively avoid the deformation problem caused by uneven thermal expansion and contraction of the casting, ensure the geometric dimensional accuracy of the casting, and improve the product qualification rate.

[0021] 5. This utility model reduces the adhesion between the casting and the mold cavity and the surface of the molding module by applying a nano-coating, thereby reducing demolding resistance, avoiding problems such as poor demolding, sticking, or scratches, and improving the yield and surface quality of the casting. Attached Figure Description

[0022] This utility model will be described by way of example and with reference to the accompanying drawings, wherein: Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the lower mold of this utility model; Figure 3 This is a schematic diagram of the upper mold of this utility model; Figure 4 This is a schematic diagram of the thin-walled, ultra-long parallel plate structure casting of this utility model; Figure 5 This is a top view of the present invention; Figure 6 for Figure 5 A cross-sectional view along the direction of the cutting symbol AA; Figure 7 for Figure 6 A magnified view of a portion of point C in the middle; Figure 8 for Figure 5 A cross-sectional view along the direction of the cutting symbol BB; Figure 9 for Figure 8 A magnified view of a portion of point D.

[0023] Reference numerals: 1-Upper mold, 2-Lower mold, 3-Mold cavity, 4-Shaping module, 5-Casting pouring cavity, 6-Pour pipe, 7-Assembly gap, 8-Curved venting groove, 9-Heat dissipation fin, 10-Positioning pin, 11-Positioning groove, 12-Ejection part, 13-Clamping part, 14-Through groove, 15-Vibration motor, 16-Micro gap. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0025] Example: See Figures 1-9 This utility model provides a thin-walled, ultra-long parallel plate structure casting mold, including an upper mold 1 and a lower mold 2 arranged correspondingly. The top surface of the lower mold 2 has at least two mold cavities 3, which are geometrically symmetrically distributed in the front-back and left-right directions. The bottom surface of the upper mold 1 is provided with a molding module 4 that cooperates with the mold cavity 3. The molding module 4 and the mold cavity 3 form a casting pouring cavity 5. Each casting pouring cavity 5 is connected to a pouring pipe 6, which extends through the lower mold 2. The contact area between the molding module 4 and the inner wall of the mold cavity 3 is reserved with an assembly gap 7 of 0.03-0.05mm. The lower mold 2 has symmetrical through slots 14 below the casting pouring cavity 5, and each through slot 14 is provided with a vibration motor 15 below the casting pouring cavity 5.

[0026] The shape of the thin-walled, extra-long parallel plate structure casting produced by this mold is shown in the reference. Figure 4 The structure of its mold cavity 3 and molding module 4 is correspondingly designed according to the shape of the casting. The machining process of this casting is as follows: First, driven by a hydraulic mechanism, the upper mold 1 and lower mold 2 close together. The molding module 4 on the bottom surface of the upper mold 1 is precisely embedded into the mold cavity 3 on the top surface of the mold, and the gap between the two forms the casting pouring cavity 5. Next, molten material is filled into each casting pouring cavity 5 simultaneously or independently through the pouring pipe 6 extending through the lower mold 2. At the same time, the vibration motor 15 in the through slot 14 is activated to vibrate the upper casting pouring cavity 5 to accelerate the discharge of gas from the mold and ensure that the molten material fully fills the thin-walled area. After the mold is filled, the casting is allowed to cool and solidify. Finally, the upper mold 1 and lower mold 2 are separated, the casting is removed, and the next production cycle can begin. Specifically, the mold cavity 3 adopts a geometrically symmetrical design in the front-to-back and left-to-right directions. This design ensures that the mold is subjected to uniform force when closing, effectively avoiding mold displacement caused by local stress concentration, and allows for more even filling of molten material, reducing dimensional deviations from the source and ensuring the quality of the casting. Meanwhile, after the molding module 4 is embedded in the mold cavity 3, in addition to forming the molding gap of the casting pouring cavity 5, a 0.03-0.05mm assembly gap 7 is reserved in the contact area between the molding module 4 and the inner wall of the mold cavity 3. This gap serves as an exhaust channel, which can quickly exhaust the gas generated during the die casting process, reduce the risk of gas resistance inside the mold, ensure that the molten material fully fills the thin-walled area, and solve problems such as local incomplete forming, surface defects, or internal porosity of the casting. In this process, the cooperation of the through groove 14 and the vibration motor 15 can further accelerate the exhaust, promote the uniform filling of the molten material, effectively reduce the weight of the mold, and effectively shorten the cooling time of the casting by exchanging heat with the external environment through the through groove 14. Compared with traditional casting molds, this mold has a simple structure, is easy to use, and has low manufacturing cost. Through the multi-cavity design 3, multiple castings can be formed at one time, which greatly improves production efficiency and meets the needs of batch and large-scale production.

[0027] In one specific implementation, see Figure 2 , Figure 7 and Figure 9 The lower mold 2 is provided with curved venting grooves 8 at the top edge of the mold cavity 3.

[0028] The assembly gap 7, combined with the curved venting groove 8 opened at the top edge of the mold cavity 3, can further accelerate the exhaust of gas and effectively reduce the generation of surface defects and internal pores in the casting.

[0029] In one specific implementation, see Figure 3 and Figure 9 The bottom surface of the upper mold 1 is provided with heat dissipation ribs 9 that fit on the top surface of the casting cavity 5.

[0030] The heat dissipation fins 9 act directly on the top surface of the casting cavity 5, accelerating heat conduction of the molten material during solidification. This shortens the cooling time, evens out the temperature distribution of the casting, and reduces the impact of thermal stress caused by temperature gradients. This design effectively avoids deformation problems such as bulging in the middle and sinking at both ends caused by uneven thermal expansion and contraction, thereby ensuring the geometrical accuracy of the casting and improving the product qualification rate.

[0031] In one specific implementation, see Figure 9 A micro gap of 0.03-0.05mm is reserved in the contact area between the heat dissipation fins 9 and the inner wall of the mold cavity 3.

[0032] The micro-gap 16 has the same function as the assembly gap 7, serving as an exhaust channel. This prevents the heat dissipation fins 9 from obstructing gas discharge after they are placed on the top surface of the casting pouring cavity 5, thereby improving the surface quality and filling uniformity of the casting.

[0033] In one specific implementation, see Figure 2 and Figure 3 The bottom surface of the upper mold 1 is provided with multiple positioning pins 10, and the top surface of the lower mold 2 is provided with multiple positioning grooves 11 that cooperate with the positioning pins 10.

[0034] The positioning pin 10 and the positioning groove 11 form a positioning structure, which can help operators quickly complete the mold closing and alignment, ensure that the molding module 4 of the upper mold 1 and the mold cavity 3 of the lower mold 2 are accurately aligned, ensure the dimensional consistency of the casting pouring cavity 5, and thus ensure the quality stability of the casting.

[0035] In one specific embodiment, a rubber sleeve is provided inside the positioning groove 11.

[0036] By installing a rubber sleeve inside the positioning groove 11, the wear between the positioning pin 10 and the positioning groove 11 during the mold closing process is reduced, thereby improving the service life of the mold.

[0037] In one specific implementation, see Figure 1 , Figure 2 , Figure 3 , Figure 6 and Figure 8 The outer circumference of the top surface of the upper mold 1 is integrally formed with an ejector part 12, and the outer circumference of the bottom surface of the lower mold 2 is integrally formed with a clamping part 13.

[0038] During demolding, external hydraulic equipment can apply stable pressure to the lower mold 2 through the clamping part 13 to ensure that the lower mold 2 remains fixed during the demolding process and avoid displacement; at the same time, external ejection equipment (such as die-casting machine ejector pin) can act on the ejection part 12 to apply a uniform and stable lifting force to the upper mold 1, so that the upper mold 1 and the lower mold 2 are separated, and the demolding operation is realized.

[0039] In one specific embodiment, the surfaces of the mold cavity 3 and the shaping module 4 are treated with a nano-coating.

[0040] Applying a nano-coating (such as titanium nitride) to the surfaces of the mold cavity 3 and the molding module 4 can reduce the adhesion between the casting and the surfaces of the mold cavity 3 and the molding module 4, thereby reducing demolding resistance, avoiding problems such as poor demolding, sticking to the mold or scratches, and improving the yield and surface quality of the casting.

[0041] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A thin-walled, ultra-long parallel plate structure casting mold, characterized in that, The system includes an upper mold (1) and a lower mold (2) arranged in a corresponding manner. The top surface of the lower mold (2) is provided with at least two mold cavities (3). The mold cavities (3) are geometrically symmetrically distributed in the front-back direction and the left-right direction. The bottom surface of the upper mold (1) is provided with a molding module (4) that cooperates with the mold cavity (3). The molding module (4) and the mold cavity (3) form a casting pouring cavity (5). The casting pouring cavity (5) is connected to a pouring pipe (6). The pouring pipe (6) extends through the lower mold (2). The contact area between the molding module (4) and the inner wall of the mold cavity (3) is reserved with an assembly gap (7) of 0.03-0.05mm. The lower mold (2) is symmetrically provided with through slots (14) below the casting pouring cavity (5). The through slots (14) are provided with vibration motors (15) below the casting pouring cavity (5).

2. The thin-walled, ultra-long parallel plate structure casting mold according to claim 1, characterized in that, The lower mold (2) is provided with curved venting grooves (8) at the top edge of the mold cavity (3).

3. The thin-walled, ultra-long parallel plate structure casting mold according to claim 1, characterized in that, The bottom surface of the upper mold (1) is provided with heat dissipation ribs (9) that cover and fit the top surface of the casting pouring cavity (5).

4. A thin-walled, ultra-long parallel plate structure casting mold according to claim 3, characterized in that, The contact area between the heat dissipation fin (9) and the inner wall of the mold cavity (3) is reserved with a micro gap (16) of 0.03-0.05mm.

5. A thin-walled, ultra-long parallel plate structure casting mold according to claim 1, characterized in that, The bottom surface of the upper mold (1) is provided with a plurality of positioning pins (10), and the top surface of the lower mold (2) is provided with a plurality of positioning grooves (11) that cooperate with the positioning pins (10).

6. A thin-walled, ultra-long parallel plate structure casting mold according to claim 5, characterized in that, A rubber sleeve is provided inside the positioning groove (11).

7. A thin-walled, ultra-long parallel plate structure casting mold according to claim 1, characterized in that, The outer circumference of the top surface of the upper mold (1) is integrally formed with an ejector part (12), and the outer circumference of the bottom surface of the lower mold (2) is integrally formed with a clamping part (13).

8. A thin-walled, ultra-long parallel plate structure casting mold according to claim 1, characterized in that, The surfaces of the mold cavity (3) and the shaping module (4) are treated with a nano-coating.

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