Rotation stopping and mistake proofing structure of special-shaped mold core

Abstract

The utility model relates to the technical field of die-casting die cores, in particular to a rotation stopping and mistake proofing structure of a special-shaped core, which comprises a hanging table section, a positioning section, a forming section and a special-shaped section which are integrally formed in sequence, the hanging table section is cylindrical; a mistake proofing structure and a rotation stopping structure are arranged on the hanging table section, the mistake proofing structure comprises an L-shaped notch formed in one side of the hanging table section, and the rotation stopping structure comprises a vertical plane formed in the hanging table section; and the vertical plane is opposite to the L-shaped notch. According to the scheme, the L-shaped notch and the vertical plane are arranged on the mold core to form the rotation stopping face, so that the situation that the mold core rotates in the circumferential direction after being installed on the mold is prevented, the shape of the L-shaped notch is different from that of the vertical plane, the L-shaped notch can serve as an identification structure, and the direction of the special-shaped structure at the front end of the mold core can be observed and confirmed during installation; therefore, the shape accuracy of an inner cavity of the part after die-casting forming is guaranteed, the reject ratio is reduced, and the die-casting quality of the part is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of die-casting mold cores, specifically to an anti-rotation and error-prevention structure for irregularly shaped cores. Background Technology

[0002] In die casting molds, the core is a mandrel-shaped mold used to form the internal cavity of the part, and it is an indispensable component of the die casting mold.

[0003] After the core is installed on the mold, during the die casting process, molten metal is poured into the mold. Through the arrangement and positioning of the core, the molten metal forms the internal cavity required for the part within the mold. The shape and size of the core determine the final internal shape and size of the casting, thereby enabling the casting of parts with complex geometries. For example, the prior art "A mold core for preventing the hanging platform from breaking" (publication number: CN114290619B) discloses a mold core including a forming part, a positioning part, and a hanging platform, and the entire core is a rotating structure; however, the prior art still has the following technical problems:

[0004] The existing core structure is a cylindrical rotating body structure, which is prone to circumferential rotation after being installed inside the mold. Therefore, it is only suitable for cavity molding of rotating bodies. However, some parts require irregularly shaped cavities inside, and the front end of the core needs to be designed with a corresponding irregular shape. Due to the asymmetry of the irregular structure, if the core rotates circumferentially during the die casting process, it will cause shape errors in the internal cavity of the part after molding. At the same time, if the installation direction of the core is incorrect, it will also cause shape errors in the internal cavity of the part after molding. Therefore, the existing core structure is not suitable for molding irregularly shaped cavities, which easily leads to the shape of the cavity after molding not meeting the requirements, increasing the defect rate of die casting. Utility Model Content

[0005] This invention provides a rotation-prevention and error-proof structure for irregularly shaped cores, which can solve the problem that the existing core structure is not suitable for the molding of irregularly shaped cavities, which easily leads to errors in the shape, structure and orientation of the cavity after molding, increasing the defect rate of die casting.

[0006] This application provides the following technical solution: a rotation-prevention and error-proof structure for an irregularly shaped core, comprising a mounting section, a positioning section, a forming section, and an irregularly shaped section integrally formed sequentially; the mounting section is cylindrical; the mounting section is provided with an error-proof structure and an anti-rotation structure, the error-proof structure including an L-shaped notch on one side of the mounting section, and the anti-rotation structure including a vertical plane on the mounting section; the vertical plane is arranged opposite to the L-shaped notch.

[0007] Beneficial effects:

[0008] This solution reduces defect rates and improves die-casting quality. Because irregularly shaped cavities have a fixed positional relationship with the part, if the core rotates circumferentially during die casting or is installed in the wrong direction, it will lead to incorrect cavity formation after die casting. This solution addresses this by using an L-shaped notch and a vertical plane positioned on the mounting platform, with corresponding mounting grooves on the mold. After the core is installed, the L-shaped notch and the vertical plane form an anti-rotation surface, preventing circumferential rotation. The L-shaped notch, with its different shape from the vertical plane, serves as a marker, facilitating observation and confirmation of the orientation of the irregular structure at the core's front end and the L-shaped notch during installation. This prevents incorrect core orientation, ensuring the accuracy of the internal cavity shape after die casting, reducing defect rates, and improving die-casting quality.

[0009] Furthermore, the L-shaped notch includes an axial surface and a radial surface, the radial surface being perpendicular to the axial surface, and the axial surface being parallel to the vertical plane.

[0010] Beneficial effects: The axial surface and the vertical plane are parallel to each other, so that the entire hanging platform section cannot form a complete circumferential shape. After the core is installed in the mold, the axial surface and the vertical plane prevent the hanging platform section from rotating circumferentially from two directions, thereby improving the anti-rotation effect on the entire core.

[0011] Furthermore, the axial length of the axial surface is half the axial length of the mounting platform section.

[0012] Beneficial effects: Since the axial and radial surfaces of the mounting platform section need to fit against the wall of the mounting groove of the mold when the core is installed into the mold, the axial length of the axial surface is set to half the axial length of the mounting platform section, so that the axial surface is configured more evenly and reasonably relative to the length of the mounting platform section, thereby improving the stability of the core installation.

[0013] Furthermore, the axial surface and the vertical plane are symmetrically arranged with respect to the central axis of the hanging platform section.

[0014] Beneficial effects: The central axis of the mounting section is the rotation center line of the core. The axial surface and the vertical plane are symmetrically set with respect to the central axis of the mounting section, which can form an anti-rotation surface and achieve the best anti-rotation effect.

[0015] Furthermore, the positioning segment is a cylinder.

[0016] Beneficial effects: The cylindrical positioning section facilitates the guidance and positioning of the core when it is installed into the mold, improving the convenience of core installation and the stability after installation.

[0017] Furthermore, the outer peripheral surface of the forming section is a conical surface.

[0018] Beneficial effect: Since the forming section needs to extend into the interior of the die-cast part to form a cavity, setting the outer peripheral surface of the forming section as a conical surface can help the core to smoothly exit the die-cast part during demolding.

[0019] Furthermore, the mounting platform section is also provided with a protruding structure, which divides the L-shaped notch into two parts.

[0020] Beneficial effects: The raised structure divides the L-shaped notch into two parts, increasing the number of contact surfaces at both ends of the raised structure. After the core is installed into the mold, more contact surfaces mean more limiting surfaces, which can improve the anti-rotation effect. Attached Figure Description

[0021] Figure 1 This is the main structural view of the present invention.

[0022] Figure 2 For this Figure 1 Sectional view of AA.

[0023] Figure 3 This is a top view of Example 2. Detailed Implementation

[0024] The following detailed description illustrates the specific implementation method:

[0025] The markings in the accompanying drawings include: irregular section 1, forming section 2, positioning section 3, vertical plane 4, hanging platform section 5, radial surface 6, axial surface 7, and protruding structure 8.

[0026] Example 1

[0027] like Figure 1 and Figure 2 As shown, a rotation-prevention and error-proof structure for an irregularly shaped core includes, from bottom to top, an integrally formed mounting section 5, a positioning section 3, a forming section 2, and an irregularly shaped section 1. The positioning section 3 is cylindrical; its cylindrical shape facilitates guiding and positioning the core during mold insertion, improving ease of installation and stability after insertion. The outer circumferential surface of the forming section 2 is conical; since the forming section 2 needs to extend into the die-cast part to form a cavity, setting its outer circumferential surface as conical helps the core smoothly exit the molded part during demolding. The structure of the irregularly shaped section 1 is manufactured according to product requirements.

[0028] The mounting section 5 is cylindrical. It features an anti-misalignment structure and an anti-rotation structure. The anti-misalignment structure includes an L-shaped notch on one side of the mounting section 5, comprising an axial surface 7 and a radial surface 6, with the radial surface 6 perpendicular to the axial surface 7. The anti-rotation structure includes a vertical plane 4 on the mounting section 5. The axial surface 7 and the vertical plane 4 are symmetrically arranged with respect to the central axis of the mounting section 5, making them parallel to each other. The axial surface 7 and the vertical plane 4 prevent the entire mounting section 5 from forming a complete circle. Therefore, after the core is installed into the corresponding mounting slot on the mold, the axial surface 7 and the vertical plane 4 form an anti-rotation surface, preventing circumferential rotation of the mounting section 5 from occurring in two directions, thus enhancing the anti-rotation effect on the entire core.

[0029] like Figure 1 As shown, the axial length of the axial surface 7 is half the axial length of the mounting section 5. Since the axial surface 7 and radial surface 6 of the mounting section 5 need to fit against the wall of the mounting groove of the mold when the core is installed into the mold, the axial length of the axial surface 7 is set to half the axial length of the mounting section 5, so that the length configuration of the axial surface 7 relative to the mounting section 5 is more uniform and reasonable, and the stability of the core installation is improved.

[0030] The usage method of this structure is as follows:

[0031] This core structure needs to be installed and fixed inside the mold. The mold has a corresponding mounting slot. When the core is inserted into the mounting slot, the shape of the L-shaped notch on the mounting platform 5 is different from that of the vertical plane 4, which can serve as an identification structure to help operators distinguish the direction of the core. This helps to observe and confirm the direction of the irregular structure at the front end of the core and the L-shaped notch during installation, preventing incorrect core orientation. At the same time, the axial surface 7 on the L-shaped notch and the vertical plane 4 are parallel to each other, forming an anti-rotation surface. The shape of the mounting slot of the mold matches the shape of the mounting platform 5. Therefore, the axial surface 7 and the vertical plane 4 can prevent the core from rotating circumferentially, ensuring the shape accuracy of the internal cavity after die casting, reducing the defect rate, and improving the die casting quality of the parts.

[0032] Example 2

[0033] The difference between this embodiment and Embodiment 1 is that the mounting section 5 is further provided with a protruding structure 8, which divides the L-shaped notch into two parts. The protruding structure 8 divides the L-shaped notch into two parts, thereby increasing the number of contact surfaces at both ends of the protruding structure 8, which increases the limiting surface for anti-rotation. After the core is installed into the mold, the circumferential anti-rotation effect of the core can be improved.

[0034] The above are merely embodiments of this utility model, and the utility model is not limited to the field covered by this embodiment. Commonly known structures and characteristics in the solutions are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A rotation-prevention and error-proof structure for irregularly shaped cores, characterized in that: It includes a hanging platform section, a positioning section, a forming section, and an irregularly shaped section that are integrally formed in sequence; the hanging platform section is cylindrical; the hanging platform section is provided with an anti-misalignment structure and an anti-rotation structure, the anti-misalignment structure includes an L-shaped notch opened on one side of the hanging platform section, and the anti-rotation structure includes a vertical plane opened on the hanging platform section; the vertical plane is arranged opposite to the L-shaped notch.

2. The anti-rotation and error-prevention structure for an irregularly shaped core according to claim 1, characterized in that: The L-shaped notch includes an axial surface and a radial surface, the radial surface being perpendicular to the axial surface, and the axial surface being parallel to the vertical plane.

3. The anti-rotation and error-prevention structure for an irregularly shaped core according to claim 2, characterized in that: The axial length of the axial surface is half the axial length of the platform section.

4. The anti-rotation and error-prevention structure for an irregularly shaped core according to claim 3, characterized in that: The axial plane and the vertical plane are symmetrically arranged with respect to the central axis of the hanging platform section.

5. The anti-rotation and error-prevention structure for an irregularly shaped core according to claim 4, characterized in that: The positioning segment is a cylinder.

6. The anti-rotation and error-prevention structure for an irregularly shaped core according to claim 5, characterized in that: The outer peripheral surface of the forming section is a conical surface.

7. The anti-rotation and error-prevention structure for an irregularly shaped core according to claim 6, characterized in that: The mounting platform section is also provided with a protruding structure, which divides the L-shaped notch into two parts.

Images