Automobile mold facilitating demolding

Abstract

The utility model discloses a kind of automobile moulds convenient to demould, it is related to mould technical field, including: pedestal, fixed in machine tool;Lower mould, rotatably installed on the pedestal;Upper mould, install the hydraulic rod of machine tool, and cooperate with the lower mould to form die groove;Injection hole, set up at the axis of the upper mould, for injecting molten material into the die groove;Edge separation mechanism, set in the upper mould, for separating and polishing the top edge of workpiece after workpiece forming.The utility model realizes the automatic polishing and separation of the top edge of workpiece under the die closed state by the edge separation mechanism integrated in the upper mould, effectively solves the sticking problem of the top edge of workpiece and the upper mould, avoids the possible injury or deformation caused by traditional mold opening, simultaneously completes deburring process, significantly improves product edge quality and production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, specifically an automobile mold that is easy to demold. Background Technology

[0002] In the automotive manufacturing industry, injection molds are the core equipment for producing various plastic parts. Their technical level directly affects the quality, cost, and production efficiency of products. With the increasing trend of lightweighting and complex design in automobiles, workpieces with complex structural features such as deep cavities, concave interiors, and thin walls are being used more and more widely, such as cup-shaped structural parts and bottle cap-shaped functional parts in automotive interiors. After injection molding, the cooling and shrinkage of these workpieces often leads to a large clamping force and vacuum adsorption between the workpiece and the mold cavity, making the demolding process a technical challenge in production.

[0003] Currently, the industry commonly uses an ejection mechanism in the lower mold to directly eject the workpiece after mold opening for demolding such complex workpieces. However, this direct ejection method has obvious limitations. Due to the huge and uneven adhesion between the workpiece and the mold cavity, a single ejection force is difficult to overcome the overall clamping force, which can easily lead to ejection failure or cause defects such as whitening, scratches, or even penetration on the workpiece surface, seriously affecting the product qualification rate. In particular, for concave structures, the adhesion problem between the top edge of the workpiece and the upper mold cannot be solved by the ejection force below. Forced ejection will inevitably cause the workpiece to be pulled and deformed. Therefore, an automotive mold that is easy to demold is needed to solve the existing shortcomings. Utility Model Content

[0004] Technical problems to be solved

[0005] Existing direct ejection methods are prone to workpiece damage and deformation due to uneven adhesion and sticking to the upper mold. Therefore, this utility model provides an automotive mold that is easy to demold to solve the shortcomings of the existing methods.

[0006] Technical solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: an easy-to-demold automotive mold, comprising:

[0008] Base, fixed to the machine tool;

[0009] The lower mold is rotatably mounted on the base;

[0010] The upper mold is mounted on a hydraulic rod on the machine tool and cooperates with the lower mold to form a mold groove;

[0011] The injection hole is located at the center of the upper mold and is used to inject molten material into the mold groove.

[0012] An edge separation mechanism is provided inside the upper mold and is used to separate and grind the top edge of the workpiece after it has been formed.

[0013] A rotation control mechanism is mounted on the base and is connected to the lower mold via a transmission connection. It is used to drive the lower mold to rotate so that the molded workpiece is separated from the mold.

[0014] An ejection mechanism is located at the bottom of the lower mold and is used to eject the separated workpiece from the lower mold.

[0015] Furthermore, the upper mold includes:

[0016] A receiving block is connected to the hydraulic rod;

[0017] A protrusion is fixed to the lower part of the receiving block, and the shape of the protrusion matches the concave shape of the workpiece.

[0018] Furthermore, the edge separation mechanism includes:

[0019] A connecting cover is rotatably disposed inside the receiving block;

[0020] A grinding ring is fixed to the bottom of the connecting cover, and the lower end face of the grinding ring corresponds to the top edge of the workpiece after it is formed.

[0021] Furthermore, the edge separation mechanism also includes:

[0022] One toothed ring is coaxially fixed to the outer peripheral wall of the connecting cover;

[0023] Gear 1 is rotatably supported in the receiving block via a rotating shaft and meshes with gear ring 1;

[0024] Motor 1 is fixed to the top of the receiving block, and its output shaft is connected to the rotating shaft of gear 1 to drive gear 1 to rotate.

[0025] Furthermore, the rotation control mechanism includes:

[0026] The second toothed ring is coaxially fixed to the outer peripheral wall of the lower mold.

[0027] Gear 2 is rotatably supported on the base via a rotating shaft and meshes with gear ring 2;

[0028] Motor 2 is fixed on the base, and its output shaft is connected to the rotating shaft of gear 2 to drive gear 2 to rotate.

[0029] Furthermore, the ejection mechanism includes:

[0030] The base plate is movably disposed on the inner bottom of the lower mold;

[0031] The guide rod is fixed to the bottom of the base plate and extends downward through the bottom of the lower mold;

[0032] A hydraulic cylinder is fixed to the outer bottom of the lower mold, and its piston rod is connected to the guide rod. It is used to drive the guide rod and the base plate to move upward synchronously to push the workpiece out of the lower mold.

[0033] Furthermore, the bottom surface of the grinding ring is provided with grinding patterns or inlaid with abrasive material to achieve grinding and deburring treatment of the top edge of the workpiece.

[0034] Compared with existing technologies, this easy-to-demold automotive mold has the following advantages:

[0035] I. This utility model achieves automated grinding and separation of the top edge of the workpiece in the closed state by integrating an edge separation mechanism in the upper mold. This effectively solves the problem of adhesion between the top edge of the workpiece and the upper mold, avoids the tearing or deformation that may be caused during traditional mold opening, and completes the deburring process in one step, significantly improving the edge quality of the product and production efficiency.

[0036] Second, this utility model sets up a rotation control mechanism driven by a motor on the base. After the edge separation and before the mold opening, the lower mold is driven to rotate. The centrifugal force and vibration effect are used to separate the outer side of the workpiece from the inner wall of the lower mold. This design of pre-loosening the workpiece in the closed mold cavity breaks the mold sticking problem caused by vacuum adsorption or cooling shrinkage, and creates key conditions for subsequent non-destructive mold opening.

[0037] Third, this utility model adopts a demolding process of "first edge separation, then rotational separation, and finally mold opening and ejection", which decomposes the complex demolding process into multiple continuous and controllable automated steps. It optimizes the traditional demolding method that relies on brute force to open the mold, greatly reduces the demolding difficulty and scrap rate of deep cavity and concave workpieces, and ensures the integrity and dimensional accuracy of the workpiece. Attached Figure Description

[0038] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0039] Figure 2 This is a schematic cross-sectional view of the present invention.

[0040] Figure 3 This is a schematic diagram of the exploded structure of this utility model;

[0041] Figure 4 This utility model Figure 3 Another perspective on the structure.

[0042] In the diagram: 1. Base; 2. Lower mold; 3. Upper mold; 301. Receiving block; 302. Protrusion; 4. Injection hole; 5. Edge separation mechanism; 501. Connecting cover; 502. Grinding ring; 503. Gear ring one; 504. Gear one; 505. Motor one; 6. Rotation control mechanism; 601. Gear ring two; 602. Gear two; 603. Motor two; 7. Base plate; 8. Guide rod; 9. Hydraulic cylinder. Detailed Implementation

[0043] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0044] like Figure 1-4 As shown, this utility model provides a technical solution: an automotive mold that is easy to demold, suitable for molding workpieces with deep cavities and concave features, such as bottle cap-shaped functional parts, cup-shaped structural parts, or parts with complex flanges in automotive interiors. Through an innovative mechanical structure, this mold decomposes the traditional demolding problem into three continuous automated steps: edge separation, rotational separation, and ejection, which significantly reduces the risk of damage to the workpiece during demolding and improves the production cycle.

[0045] like Figure 1 and Figure 2 As shown, the core structure of the mold includes a base 1 fixed on the machine tool. A lower mold 2 that can rotate around its axis is installed on the base 1. Corresponding to the lower mold 2 is an upper mold 3, which is installed at the end of the machine tool hydraulic rod and can move up and down with the hydraulic rod. When the upper mold 3 moves downward and closes with the lower mold 2, a mold groove that perfectly matches the shape of the workpiece is formed between the two. In order to inject molten material, such as plastic, an injection hole 4 is opened at the center of the upper mold 3. This hole is connected to the external injection molding machine barrel.

[0046] like Figure 1 , Figure 3 and Figure 4As shown, in order to solve the problem that the top edge of the concave workpiece is easy to stick to the mold, this mold has a specially designed edge separation mechanism 5 inside the upper mold 3. The core of this mechanism is a rotatable grinding ring 502. After the workpiece is cooled and formed, but before the mold is opened, the grinding ring 502 will start and rotate to precisely grind and cut the top edge of the workpiece, so that it is completely separated from the surface of the upper mold 3. To achieve this function, the upper mold 3 contains a receiving block 301 and a protrusion 302 fixed to the bottom of the receiving block for mounting the entire edge separation mechanism 5. The mechanism connects the grinding ring 502 to the driving part through a connecting cover 501. The driving part consists of a motor 505, a gear 504 and a toothed ring 503 fixed on the connecting cover 501. After the motor 505 starts, the connecting cover 501 and the grinding ring 502 are driven to rotate synchronously through the meshing transmission of the gear 504 and the toothed ring 503.

[0047] like Figure 1 , Figure 3 and Figure 4 As shown, after the top edge of the workpiece is successfully separated, and while the mold is still closed, the workpiece may remain tightly attached to the inner wall of the lower mold 2 due to vacuum adsorption or cooling shrinkage. Therefore, this mold incorporates a rotation control mechanism 6 on the base 1. This mechanism consists of a motor 603, a gear 602, and a gear ring 601. The gear ring 601 is fixed to the outside of the lower mold 2. When the motor 603 starts, it drives the lower mold 2 to rotate at high or low speed via the gear 602. The centrifugal force generated by the rotation, along with slight vibration, effectively breaks the adhesion between the workpiece and the inner wall of the lower mold 2, causing the outer side of the workpiece to separate from the lower mold 2. Then, the upper mold 3 is controlled to move upwards to complete the mold opening.

[0048] Finally, in order to completely remove the loosened workpiece, an ejection mechanism is installed at the bottom of the lower mold 2. This mechanism includes a movable base plate 7 located at the bottom of the lower mold cavity. A guide rod 8 is fixed below the base plate 7. The guide rod 8 passes through the bottom of the lower mold 2 and is connected to the piston rod of a hydraulic cylinder 9 fixed outside the lower mold 2. When it is necessary to eject the workpiece, the hydraulic cylinder 9 works, pushing the piston rod and the guide rod 8 upward, thereby ejecting the base plate 7 together with the workpiece placed on it from the cavity of the lower mold 2, completing the entire demolding process.

[0049] To ensure effective edge separation, the bottom surface of the grinding ring 502 undergoes special treatment. Its surface can be machined with fine grinding patterns or inlaid with an abrasive material suitable for plastic materials, such as a diamond or silicon carbide coating. This allows it to not only cut burrs during rotation but also smooth the edges of the workpiece, completing the separation and deburring process in one step, thus improving production efficiency and product quality.

[0050] It should be noted that in this document, 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. They are used solely for the convenience of describing this utility model and for 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. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, unless otherwise explicitly specified and limited, the terms "fixed," "installed," "connected," and "linked" should be interpreted broadly. For example, "installed" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a mechanical connection or an electrical connection; "linked" can be a direct connection, an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0051] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An easy-to-demold automotive mold, characterized in that, include: Base (1), fixed to the machine tool; The lower mold (2) is rotatably mounted on the base (1); The upper mold (3) is mounted on the hydraulic rod of the machine tool and cooperates with the lower mold (2) to form a mold groove; Injection hole (4) is opened at the axis of the upper mold (3) and is used to inject molten material into the mold groove; An edge separation mechanism (5) is provided in the upper mold (3) for separating and grinding the top edge of the workpiece after it has been formed. A rotation control mechanism (6) is provided on the base (1) and is connected to the lower mold (2) for driving the lower mold (2) to rotate so that the molded workpiece is separated from the mold. An ejection mechanism is provided at the bottom of the lower mold (2) for ejecting the separated workpiece from the lower mold (2).

2. The automobile mold for easy demolding according to claim 1, characterized in that, The upper mold (3) includes: The receiving block (301) is connected to the hydraulic rod; A protrusion (302) is fixed to the lower part of the receiving block (301), and the shape of the protrusion (302) matches the concave shape of the workpiece.

3. The automobile mold for easy demolding according to claim 2, characterized in that, The edge separation mechanism (5) includes: A connecting cover (501) is rotatably disposed inside the receiving block (301); A grinding ring (502) is fixed to the bottom of the connecting cover (501), and the lower end face of the grinding ring (502) corresponds to the top edge of the workpiece after it is formed.

4. The automobile mold for easy demolding according to claim 3, characterized in that, The edge separation mechanism (5) also includes: A toothed ring (503) is coaxially fixed to the outer peripheral wall of the connecting cover (501); Gear 1 (504) is rotatably supported in the receiving block (301) via a rotating shaft and meshes with gear ring 1 (503); Motor 1 (505) is fixed to the top of the receiving block (301), and its output shaft is connected to the rotating shaft of gear 1 (504) to drive gear 1 (504) to rotate.

5. The automobile mold for easy demolding according to claim 4, characterized in that, The rotation control mechanism (6) includes: The toothed ring 2 (601) is coaxially fixed to the outer peripheral wall of the lower mold (2); Gear 2 (602) is rotatably supported on the base (1) via a rotating shaft and meshes with gear ring 2 (601); Motor 2 (603) is fixed on the base (1), and its output shaft is connected to the rotating shaft of gear 2 (602) to drive gear 2 (602) to rotate.

6. The automobile mold for easy demolding according to claim 1, characterized in that, The ejection mechanism includes: The base plate (7) is movably disposed on the inner bottom of the lower mold (2); The guide rod (8) is fixed to the bottom of the base plate (7) and extends downward through the bottom of the lower mold (2); A hydraulic cylinder (9) is fixed to the bottom outer side of the lower mold (2), and its piston rod is connected to the guide rod (8) to drive the guide rod (8) and the base plate (7) to move upward synchronously to push the workpiece out of the lower mold (2).

7. The automobile mold for easy demolding according to claim 3, characterized in that, The bottom surface of the grinding ring (502) is provided with grinding patterns or inlaid with abrasive material to achieve grinding and deburring treatment of the top edge of the workpiece.

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