Automobile core rod forming die

By introducing a demolding component and an adjusting screw mechanism into the mold, the demolding and width adjustment problems of the mandrel molding mold are solved, achieving convenient demolding and high-quality molding.

CN224272856UActive Publication Date: 2026-05-26QINGDAO HAOYI IND CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
QINGDAO HAOYI IND CO LTD
Filing Date
2025-06-24
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

Existing mandrel molding dies are difficult to demold during use and cannot easily adjust the support width according to the diameter of different automotive mandrels, affecting production quality.

Method used

A mold was designed that includes forming, demolding, adjustment and moving mechanisms. Automatic demolding is achieved through the cooperation of the demolding component and the spring, and width adjustment is achieved through the cooperation of the adjusting screw and the moving component to adapt to the forming requirements of different mandrels.

Benefits of technology

This technology enables convenient demolding and width adjustment of the mandrel, improves molding quality, reduces surface damage, and ensures the roundness and production quality of the product.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model provides an automobile core rod forming die, relates to the technical field of automobile core rod forming, and aims to solve the problems that when an existing core rod forming die is used, a core rod is difficult to demold due to pressure received by the automobile core rod during forming, and a structure for assisting in demolding is not arranged, the automobile core rod forming die is characterized in that a supporting rod is arranged at the top of a main body; a top plate is arranged at the tops of the supporting rods; the top plate is connected with the forming piece through a hydraulic telescopic rod; the mounting rod is arranged at the top of the body; a demolding piece is slidably arranged on the mounting rod; springs are arranged on two sides of the bottom of the demolding piece. The arc-shaped protrusion on the top of the demolding piece makes contact with the bottom of the core rod, so that the demolding piece is driven to move downwards on the installation rod and compress the spring, after the core rod is formed, the pressure of the formed piece is lost, the demolding piece is driven to automatically reset through the reset force of the spring, the core rod is driven to bounce upwards, and therefore the core rod is conveniently demolded; and the arc-shaped bulge at the top of the demolding piece is in better contact with the core rod, so that an auxiliary supporting effect is achieved during molding.
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Description

Technical Field

[0001] This utility model belongs to the field of automotive mandrel molding technology, and more specifically, it relates to an automotive mandrel molding mold. Background Technology

[0002] An automotive mandrel is an internal support tool used in automobile manufacturing for bending pipes (such as exhaust pipes, fuel pipes, brake lines, coolant pipes, air conditioning pipes, etc.). It is a (usually) metal rod with a specific shape at its front end (such as a ball head, multi-section ball head, plunger, etc.). It is inserted into the inside of the pipe to be bent during the bending operation, and this device is needed when forming automotive mandrels.

[0003] Based on existing technology, it has been found that when using existing mandrel molding dies, the pressure received by the automotive mandrel during molding can easily make the mandrel difficult to demold, as no auxiliary demolding structure is set. Furthermore, when using existing mandrel molding dies, it is impossible to conveniently adjust the width of the supporting mandrel according to the different diameters of automotive mandrels, so as to ensure the production quality of mandrel molding. Utility Model Content

[0004] To address the aforementioned technical problems, this utility model provides an automotive mandrel forming mold, which solves the problems that existing mandrel forming molds do not have an auxiliary demolding structure and cannot conveniently adjust the width of the supporting mandrel according to the diameter of different automotive mandrels, thus failing to ensure the production quality of mandrel forming.

[0005] This utility model discloses an automotive mandrel molding die, achieved through the following specific technical means:

[0006] An automotive mandrel molding die includes a molding mechanism, a demolding mechanism, an adjusting mechanism, and a moving mechanism;

[0007] The molding mechanism is equipped with a demolding mechanism; the adjusting mechanism is mounted on the molding mechanism; the adjusting mechanism is located at the bottom of the demolding mechanism; the moving mechanism is mounted on the adjusting mechanism; the moving mechanism is located on both sides of the demolding mechanism.

[0008] The molding mechanism includes: a main body, a support rod on the top of the main body; a top plate on the top of the support rod; and the top plate connected to the molded part via a hydraulic telescopic rod.

[0009] The demolding mechanism includes: a mounting rod, which is disposed on the top of the main body; a demolding component is slidably disposed on the mounting rod; and springs are disposed on both sides of the bottom of the demolding component.

[0010] Furthermore, the molded part is provided with cylindrical protrusions; the molded part is located on top of the demolding part.

[0011] Furthermore, the top of the demolding component is provided with an arc-shaped protrusion; the spring is fitted onto the mounting rod; and the bottom of the spring is connected to the top of the main body.

[0012] Furthermore, the adjustment mechanism includes: a mounting component and a moving slot;

[0013] The mounting component is located at the top center of the main body; the movable slot is located in a rectangular structure; the movable slot is located at the top inside the mounting component.

[0014] Furthermore, the adjustment mechanism also includes: an adjustment screw;

[0015] The adjusting screw is threaded; the adjusting screw is equipped with a rotating handle; the adjusting screw is mounted on the mounting component and is located inside the moving groove.

[0016] Furthermore, the moving mechanism includes: a moving component, a roller, and a mandrel;

[0017] The top of the movable component is configured with a U-shaped structure, and the bottom of the movable component is provided with a rectangular protrusion; the movable component is slidably installed inside the movable groove through the bottom rectangular protrusion; an adjusting screw is provided inside the threaded hole of the rectangular protrusion of the movable component; a roller is rotatably provided on the movable component; a core rod is provided on the roller.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. In this device, an installation rod and a demolding component are provided. The installation rod is located at the top of the main body, while the demolding component is slidably mounted on the installation rod. During use, the arc-shaped protrusion at the top of the demolding component contacts the bottom of the mandrel, thereby causing the demolding component to move downward on the installation rod and compress the spring. After the mandrel is formed, the pressure of the formed part is lost, and the force of the spring resets the demolding component to automatically reset, thereby causing the mandrel to spring upward, thus facilitating the demolding of the mandrel. The arc-shaped protrusion at the top of the demolding component can better contact the mandrel and play an auxiliary support role during the forming process.

[0020] 2. This device includes an adjusting screw and a moving part. The adjusting screw is mounted on the mounting part, while the moving part is slidably mounted inside the moving groove. During use, by adjusting the handle on the adjusting screw, the moving part is moved relative to the other part within the moving groove. This allows for convenient adjustment of the width between the moving parts as needed, better adapting to different mandrel molding processes, reducing surface damage during molding, maintaining sufficient roundness, and improving product quality. Attached Figure Description

[0021] Figure 1 This is a front-view three-dimensional structural schematic diagram of the present invention.

[0022] Figure 2 This is a three-dimensional structural diagram of the present invention viewed from below.

[0023] Figure 3 This is an exploded three-dimensional structural diagram of the molding mechanism and demolding mechanism of this utility model.

[0024] Figure 4 This is an exploded three-dimensional structural diagram of the moving mechanism and adjusting mechanism of this utility model.

[0025] In the diagram, the correspondence between component names and drawing numbers is as follows:

[0026] 1. Molding mechanism; 101. Main body; 102. Support rod; 103. Top plate; 104. Molded part; 2. Demolding mechanism; 201. Mounting rod; 202. Demolding part; 203. Spring; 3. Adjustment mechanism; 301. Mounting part; 302. Moving groove; 303. Adjusting screw; 4. Moving mechanism; 401. Moving part; 402. Roller; 403. Core rod. Detailed Implementation

[0027] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples.

[0028] Example:

[0029] As attached Figure 1 To be continued Figure 4 As shown:

[0030] This utility model provides an automotive mandrel molding die, including a molding mechanism 1, a demolding mechanism 2, an adjusting mechanism 3, and a moving mechanism 4;

[0031] The molding mechanism 1 is equipped with a demolding mechanism 2; the adjusting mechanism 3 is installed on the molding mechanism 1; the adjusting mechanism 3 is located at the bottom of the demolding mechanism 2; the moving mechanism 4 is installed on the adjusting mechanism 3; the moving mechanism 4 is installed on both sides of the demolding mechanism 2.

[0032] The molding mechanism 1 includes: a main body 101, a support rod 102 is provided on the top of the main body 101; a top plate 103 is provided on the top of the support rod 102; the top plate 103 is connected to the molding part 104 through a hydraulic telescopic rod; the molding part 104 is driven to move up and down through the hydraulic telescopic rod on the top plate 103, thereby contacting the mandrel 403 and completing the molding operation of the mandrel 403;

[0033] The demolding mechanism 2 includes: a mounting rod 201, which is located on the top of the main body 101; a demolding component 202 is slidably mounted on the mounting rod 201; and springs 203 are provided on both sides of the bottom of the demolding component 202. The mounting rod 201 is used to provide auxiliary support for the demolding component 202, which is used to contact the mandrel 403 through a cylindrical protrusion on its top. The mandrel 403 is then pressed by the molding part 104, causing the demolding component 202 to move downward and compress the springs 203. After the molding part 104 is released, the mandrel 403 is moved upward by the force of the springs 203 returning to its original position, thereby completing the rapid demolding of the mandrel 403.

[0034] Among them, such as Figure 1 As shown, the molded part 104 is provided with a cylindrical protrusion; the molded part 104 is located on top of the demolding part 202.

[0035] Among them, such as Figure 3 As shown, the demolding part 202 has an arc-shaped protrusion on its top; the spring 203 is fitted onto the mounting rod 201; the bottom of the spring 203 is connected to the top of the main body 101.

[0036] Among them, such as Figure 4 As shown, the adjustment mechanism 3 includes: a mounting component 301 and a moving groove 302; the mounting component 301 is located at the top center of the main body 101; the moving groove 302 is located in a rectangular structure; the moving groove 302 is formed inside the top of the mounting component 301; the mounting component 301 is used to form the moving groove 302, and the moving groove 302 is used to slide the moving component 401.

[0037] Among them, such as Figure 4 As shown, the adjustment mechanism 3 further includes: an adjustment screw 303; the adjustment screw 303 is provided with threads; the adjustment screw 303 is provided with a rotating handle; the adjustment screw 303 is mounted on the mounting part 301 and is located inside the moving groove 302; the adjustment screw 303 is used to manually rotate the handle, thereby rotating the adjustment screw 303 to drive the moving part 401 to move inside the moving groove 302.

[0038] Among them, such as Figure 1As shown, the moving mechanism 4 includes: a moving part 401, a roller 402, and a mandrel 403; the top of the moving part 401 is configured with a U-shaped structure, and the bottom of the moving part 401 is provided with a rectangular protrusion; the moving part 401 is slidably mounted inside the moving groove 302 through the bottom rectangular protrusion; an adjusting screw 303 is provided inside the threaded hole of the rectangular protrusion of the moving part 401; the roller 402 is rotatably mounted on the moving part 401; the mandrel 403 is mounted on the roller 402; the moving part 401 is used to move inside the moving groove 302 by rotating the adjusting screw 303, thereby adapting to different types of mandrels 403, reducing surface damage during molding, maintaining sufficient roundness, and improving product quality, while the roller 402 is detachable, and a suitable roller 402 can be installed according to the production requirements of the mandrel 403.

[0039] The specific usage and function of this embodiment are as follows:

[0040] In this invention, when using the device, the mandrel 403 is placed on top of the roller 402. By adjusting the handle on the rotating adjusting screw 303, the adjusting screw 303 drives the moving parts 401 to move relative to each other inside the moving groove 302. This allows for convenient adjustment of the width between the moving parts 401 as needed, better adapting to the molding of different mandrels 403, reducing surface damage during molding, maintaining sufficient roundness, and improving product quality. The hydraulic telescopic rod on the top plate 103 drives the molding part 104 to move downwards, thereby connecting the molding part 104 with the mandrel 403. 3. The two parts come into contact with each other to complete the molding operation of the mandrel 403. The arc-shaped protrusion on the top of the demolding part 202 comes into contact with the bottom of the mandrel 403, thereby driving the demolding part 202 to move downward on the mounting rod 201 and compress the spring 203. After the mandrel 403 is molded, it loses the pressure of the molding part 104. The force of the spring 203 returning to its original position drives the demolding part 202 to automatically return to its original position, thereby driving the mandrel 403 to bounce upward, thus facilitating the demolding of the mandrel 403. The arc-shaped protrusion on the top of the demolding part 202 can better contact the mandrel 403 and play an auxiliary support role during molding.

Claims

1. A mold for forming automotive mandrels, characterized in that: It includes a molding mechanism (1), a demolding mechanism (2), an adjustment mechanism (3), and a moving mechanism (4); The molding mechanism (1) is provided with a demolding mechanism (2); the adjusting mechanism (3) is provided on the molding mechanism (1); the adjusting mechanism (3) is located at the bottom of the demolding mechanism (2); the moving mechanism (4) is provided on the adjusting mechanism (3); the moving mechanism (4) is provided on both sides of the demolding mechanism (2); The molding mechanism (1) includes: a main body (101), a support rod (102) is provided on the top of the main body (101); a top plate (103) is provided on the top of the support rod (102); the top plate (103) is connected to the molding part (104) through a hydraulic telescopic rod; The demolding mechanism (2) includes: a mounting rod (201) which is disposed on the top of the main body (101); a demolding component (202) is slidably disposed on the mounting rod (201); and springs (203) are disposed on both sides of the bottom of the demolding component (202).

2. The automotive mandrel molding die according to claim 1, characterized in that: The molded part (104) is provided with a cylindrical protrusion; the molded part (104) is located on top of the demolding part (202).

3. The automotive mandrel molding die according to claim 1, characterized in that: The demolding component (202) has an arc-shaped protrusion on its top; the spring (203) is fitted onto the mounting rod (201); the bottom of the spring (203) is connected to the top of the main body (101).

4. The automotive mandrel molding die according to claim 1, characterized in that: The adjustment mechanism (3) includes: a mounting component (301) and a moving slot (302); The mounting component (301) is located at the top center of the main body (101); the moving groove (302) is located in a rectangular structure; the moving groove (302) is located at the top inside the mounting component (301).

5. The automotive mandrel molding die according to claim 4, characterized in that: The adjustment mechanism (3) further includes: an adjustment screw (303); The adjusting screw (303) is provided with a thread; the adjusting screw (303) is provided with a rotating handle; the adjusting screw (303) is provided on the mounting part (301), and the adjusting screw (303) is located inside the moving groove (302).

6. The automotive mandrel molding die according to claim 5, characterized in that: The moving mechanism (4) includes: a moving part (401), a roller (402), and a mandrel (403); The top of the movable part (401) is configured with a U-shaped structure, and the bottom of the movable part (401) is provided with a rectangular protrusion; the movable part (401) is slidably installed inside the movable groove (302) through the bottom rectangular protrusion; an adjusting screw (303) is provided inside the threaded hole of the rectangular protrusion of the movable part (401); a roller (402) is rotatably provided on the movable part (401); a mandrel (403) is provided on the roller (402).