Multi-mold-core extrusion casting mold
By designing a multi-core extrusion casting mold, the core and the upper mold plate move relative to each other, solving the problems of demolding difficulties and casting cracking in multi-cavity castings, and achieving the integrity of the castings and successful extrusion casting.
Patent Information
- Application Number
- CN202423165001.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-21
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2034-12-21
AI Technical Summary
In the casting of multi-cavity castings, existing technologies have problems such as difficulty in demolding and casting cracking, especially when the core gets stuck with the casting during solidification of large-area castings, which makes it impossible to carry out extrusion casting smoothly.
A multi-core extrusion casting mold is adopted. Through the relative movement design of each core and the upper template, the core is left in the casting after the mold is closed. The core is removed after extrusion is completed. The mobility of the core is achieved by using structures such as screws, tension springs or eccentric hooks.
The problem of difficult demolding was solved, enabling successful extrusion casting of multi-cavity castings and ensuring casting integrity, thus avoiding casting cracking.
Smart Images
Figure CN223819628U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of molds, specifically a multi-core extrusion casting mold. Background Technology
[0002] Squeeze casting is a common method in metal casting, especially for non-ferrous metals such as copper, aluminum, and zinc. However, in casting... Figure 1 When casting multi-cavity parts as shown, a large draft angle is required. At the same time, the shrinkage of the large-area casting during solidification causes the sides of the cores and the casting to get stuck, making demolding difficult and even causing the casting to crack. Extrusion casting of large-area multi-core castings cannot be implemented. Utility Model Content
[0003] To address the aforementioned problems, this invention provides a multi-core extrusion casting mold, which effectively overcomes the shortcomings of existing technologies.
[0004] This utility model is achieved through the following technical solution: a multi-core extrusion casting mold, which consists of a lower mold, an upper mold plate and cores. Each cavity corresponds to a core, and each core is mounted on the upper mold plate. After the mold is closed, each core can move horizontally relative to the upper mold plate. When the extrusion casting is completed, the core remains in the casting.
[0005] Preferred technical solution: Each core and the upper template are fixed with screws, and the screws are loosened after the mold is closed.
[0006] Preferred technical solution: Each core and the upper template are held in place by a tension spring, and the resistance of the tension spring to the movement of the core can be overcome when the core needs to move horizontally.
[0007] Preferred technical solution: Each core and upper mold plate is held by a tension spring with an eccentric hook at one end. When the mold is closed, the eccentric hook rotates, reducing the distance between the two ends of the tension spring, which can reduce or eliminate the tension of the tension spring.
[0008] The beneficial effects of this utility model are: it is applied to the casting of multi-cavity extrusion castings, and adopts the method of fixing each core and the upper mold plate relatively together. After the mold is closed, each core and the upper mold plate can move relative to each other. The upper mold plate is intermittently extruded, and each core is left in the casting. After the extrusion is completed and the core is removed from the mold, it is taken out. Attached Figure Description
[0009] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0010] Figure 1This is a top view of the multi-cavity casting of this utility model;
[0011] Figure 2 This is a side view of the multi-cavity casting of this utility model;
[0012] Figure 3 This is a side view of the core of this utility model;
[0013] Figure 4 This is a top view of the core of this utility model;
[0014] Figure 5 This is a schematic diagram of the extrusion casting mold of this utility model;
[0015] Figure 6 This is a schematic diagram of the extrusion casting process of this utility model;
[0016] Figure 7 This is a schematic diagram of the casting ejection process according to this utility model;
[0017] Figure 8 This is a schematic diagram of the casting after the core is removed according to this utility model;
[0018] Figure 9 This is a schematic diagram of the installation of the core and the upper template screws in the extrusion casting of this utility model;
[0019] Figure 10 This is a schematic diagram of the installation of the core and the extrusion casting upper template tension spring of this utility model;
[0020] Figure 11 This is a schematic diagram showing the installation of the core and the tension spring of the eccentric shaft of the extrusion casting upper template of this utility model;
[0021] Figure 12 This is a schematic diagram showing the installation of the eccentric shaft release spring for the core and the upper template of the extrusion casting of this utility model.
[0022] Explanation of reference numerals in the attached figures:
[0023] 1. Multi-cavity casting; 2. Cavity; 3. Core; 4. Lower die for extrusion casting; 5. Upper die for extrusion casting; 6. Molten metal; 7. Mounting screws; 8. Mounting tension springs; 9. Tension spring hooks; 10. Adjustable eccentric hooks for tension springs. Detailed Implementation
[0024] All features disclosed in this specification, or all steps in all disclosed methods or processes, may be combined in any way, except for mutually exclusive features and / or steps.
[0025] Any feature disclosed in this specification (including any appended claims, abstract, and drawings) may be replaced by other equivalent or similar features, unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features.
[0026] In the description of this utility model, it should be understood that the terms "one end", "the other end", "outer side", "upper", "inner side", "horizontal", "coaxial", "center", "end", "length", "outer end", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. 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.
[0027] Furthermore, in the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0028] The terms used in this invention, such as “above,” “over,” “below,” and “under,” indicating spatial relative position, are for ease of description to depict the relationship of one unit or feature relative to another unit or feature as shown in the accompanying drawings. The terms of spatial relative position may be intended to include different orientations of the device in use or operation other than those shown in the figures. For example, if the device in the figures is flipped, a unit described as being “below” or “under” other units or features would be located “above” other units or features. Therefore, the exemplary term “under” can encompass both above and below orientations. The device may be oriented in other ways (rotated 90 degrees or otherwise), and the spatially related descriptive terms used herein will be interpreted accordingly.
[0029] In this utility model, unless otherwise explicitly specified and limited, the terms "set," "socket," "connect," "through," and "plug-in" 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, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0030] Example 1
[0031] like Figure 5 As shown, the lower die 4 of the extrusion casting contains molten metal 6, and the upper die consists of the upper die 5 of the extrusion casting and several cores 3. Figure 6To achieve the desired state during squeeze casting, several cores 3 and the upper die 5 are fixed relative to each other, forming the upper die. After molten metal 6 is poured into the lower die 4, the upper die descends and is immersed in the molten metal, filling the cavity 2 formed by the upper and lower dies. The relative fixation between the upper die and the cores 3 is released, and the upper die continues to press down, subjecting the molten metal 6 to pressure during solidification. After the molten metal 6 has solidified, the cores 3 remain inside the multi-cavity casting 1 and are removed from the mold (e.g., ...). Figure 7 (As shown) After removing the mold, take out each core 3, and the casting is complete (as shown). Figure 8 As shown in the figure, in this embodiment, the installation structure of the upper mold plate 5 and the core 3 in the extrusion casting is as follows: Figure 9 As shown, there are screw holes on the mating surfaces of the core 3 and the upper die 5 of the extrusion casting. The upper die 5 of the extrusion casting has countersunk holes at corresponding positions. The mounting screw 7 fixes the core 3 and the upper die 5 of the extrusion casting together. There is a gap D between the outer diameter of the mounting screw 7 and the screw hole on the upper die 5 of the extrusion casting. When the upper die 5 of the extrusion casting is pressed down to fill the molten metal, the mounting screw 7 is loosened, so that the core 3 can move in the horizontal direction as the molten metal solidifies and shrinks. The gap D is greater than or equal to the maximum moving distance of the core 3.
[0032] Example 2
[0033] The difference from Example 1 is the method of fixing the core 3 and the upper die 5 in the extrusion casting process, such as... Figure 10 As shown, there is a hole in the upper die 5 of the extrusion casting. There is a tension spring hook 9 on the side wall of the hole. One end of the installation spring 8 is hung on the tension spring hook 9, and the other end is fixed to the core 3, which pulls the core 3 tight on the lower plane of the upper die 5 of the extrusion casting. When the casting shrinks and causes the core 3 to move relative to the upper die 5 of the extrusion casting, the installation spring 8 will not restrict the movement of the core 3.
[0034] Example 3
[0035] Unlike Example 2, as Figure 11 As shown, one end of the tension spring 8 is fixed to the core 3, and the other end is hung on the eccentric adjustable hook 10. The eccentric direction of the eccentric adjustable hook 10 is upward. At this time, the core 3 is stretched taut on the upper die 5 of the extrusion casting mold by the tension spring 8. The corresponding alternative state is... Figure 2 In the figure, the eccentricity of the adjustable hook 10 is at the bottom. At this time, the tension spring 8 has no tension or very little tension, allowing the core 3 to move freely in the horizontal direction.
[0036] Implementation 4
[0037] Unlike Examples 1, 2, and 3, during the pressurization process before the molten metal 6 is completely solidified, the extrusion pressure is intermittently eliminated. When the pressure is eliminated, the pressure of the upper die 5 on each core 3, the molten metal 6, and the semi-solidified molten metal 6 is eliminated, and the semi-solidified metal drives each core 3 to shrink freely.
[0038] The beneficial effects of this utility model are: it is applied to the casting of multi-cavity extrusion castings, and adopts the method of fixing each core and the upper mold plate relatively together. After the mold is closed, each core and the upper mold plate can move relative to each other. The upper mold plate is intermittently extruded, and each core is left in the casting. After the extrusion is completed and the core is removed from the mold, it is taken out.
[0039] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions conceived without inventive effort should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope defined in the claims.
Claims
1. A multiple core squeeze casting mold for a multiple cavity squeeze casting, characterized by: The lower die, the upper die plate and the core are composed, each cavity corresponds to a core, each core is installed on the upper die plate, after the die is closed, each core can move horizontally relative to the upper die plate, the core is left in the casting when the squeeze casting is completed, there are screw holes on the fitting surface of the core and the squeeze casting upper die plate, the squeeze casting upper die plate has a counter position with a counter bore, the core and the squeeze casting upper die plate are fixed together by installing the screw, the outer diameter of the installing screw and the screw hole on the squeeze casting upper die plate have an interval D, when the squeeze casting upper die plate is pressed to make the metal liquid fill the shape, the installing screw is loosened, so that the core can move in the horizontal direction with the solidification shrinkage of the metal liquid, the interval D is greater than or equal to the maximum moving distance of the core.
2. The multi-mandrel squeeze casting mold according to claim 1, characterized by: Each core and the upper die plate are fixed by screws, and the screws are loosened after the die is closed.
3. The multi-mandrel squeeze casting mold according to claim 1, characterized by: Each core and the upper die plate are pulled by a tension spring, and the moving resistance of the tension spring to the core can be overcome when the core needs to move horizontally.
4. The multi-mandrel squeeze casting mold according to claim 1, characterized by: Each core and the upper die plate are pulled by a tension spring with an eccentric hook at one end, when the die is closed, the eccentric hook rotates to reduce the distance between the two ends of the tension spring, so that the tension of the tension spring can be reduced or eliminated.