A demolding ejector pin anti-bending guide assembly

Abstract

The utility model discloses a kind of demolding ejector pin anti-bending guiding assembly, it is related to mould technical field, including tool main body, first sliding pole, movable mould, second sliding pole and nail needle pole, further include inclined bar, guide rod and backing plate, inclined bar is obliquely arranged to abut and support nail needle pole, guide rod is fixedly connected in tool main body, first installation groove is equipped in guide rod inner wall, nail needle pole is slidably arranged in first installation groove, backing plate is fixedly connected in nail needle pole and located between guide rod and second sliding pole, this composite support structure formed by guide rod, inclined bar and backing plate provides multiple-point limiting and dynamic support for nail needle pole.The utility model is through structure, solve the problem that the ejector pin pole is bent and deformed easily in prior art due to slender and insufficient support, significantly improve the structural rigidity of nail needle pole, ensure the stable and reliable demolding action, prolong the service life of component.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, and in particular to a demolding ejector pin anti-bending guide assembly. Background Technology

[0002] In the injection molding or die casting mold production process, the ejection mechanism is an essential and critical component. The ejection mechanism typically uses ejector pins to push the molded product out of the mold cavity. To achieve this action, the ejector pin usually needs to cooperate with the moving mold and sliding rod components, performing a reciprocating linear motion after the mold opens. In many mold designs, especially when dealing with products with deep cavities or complex structures, the ejector pins used often have a large length-to-diameter ratio, meaning they are slender.

[0003] At the moment of product ejection, the ejector pin needs to overcome the clamping force or frictional resistance between the product and the mold cavity. When this ejection resistance is high, the slender ejector pin will bear significant axial pressure. Due to its insufficient rigidity, this axial pressure can easily cause elastic deformation or permanent bending of the ejector pin. Once the ejector pin bends, it will not only cause ejection failure, product scratches or damage, leading to an increased product defect rate, but may also cause the ejector pin to jam, break, or damage the mold's guide hole. This will force the production line to stop for maintenance or replacement of parts, seriously affecting production efficiency and mold lifespan. Existing demolding mechanisms often lack effective lateral support and guidance for the middle section or stress point of the ejector pin, resulting in widespread problems.

[0004] Therefore, this utility model proposes a demolding ejector pin anti-bending guide assembly to overcome the shortcomings of the prior art. Utility Model Content

[0005] In view of the problem in the prior art, the ejector pin rod of a demolding component is prone to bending and deformation when subjected to ejection resistance due to its slender structure and lack of effective support, which affects the demolding stability and may even damage the component. The present invention aims to provide a demolding ejector pin anti-bending guide component with an improved structure that can effectively solve the above problems.

[0006] This utility model provides a demolding ejector pin anti-bending guide assembly, comprising: a tool body with a first sliding groove; a first sliding rod slidably connected to the first sliding groove; a moving mold fixedly connected to the first sliding rod and having a second sliding groove; a second sliding rod slidably connected to the second sliding groove; and a pin rod with its tail fixedly connected to the second sliding rod.

[0007] The assembly also includes diagonal braces, guide rods, and pads.

[0008] The diagonal brace is inclined to abut against the support pin rod.

[0009] Furthermore, the guide rod is fixedly connected to the tool body, and the inner wall of the guide rod is provided with a first mounting groove, through which the nail rod slides; the pad is fixedly connected to the nail rod and located between the guide rod and the second sliding rod.

[0010] Preferably, to facilitate convenient installation and stable positioning of the second sliding rod, the assembly also includes an installation mechanism. The installation mechanism includes a fixing plate and an installation ring. The installation ring is fixedly sleeved on the outer wall of the second sliding rod, providing a connecting base. The inner wall of the fixing plate has a second installation groove, and the installation ring engages within this groove. This engagement allows for rapid assembly of the fixing plate and the second sliding rod.

[0011] Preferably, to securely fix the mounting mechanism to the tool body, the tool body is provided with a fixing groove. The mounting mechanism also includes screws and washers. During assembly, the screws pass through the washers and fixing plates in sequence before being threaded into the fixing groove of the tool body. The use of washers increases the contact area and prevents loosening of the fasteners.

[0012] Preferably, in order to further enhance the overall structural strength and support stability of the installation mechanism, the installation mechanism also includes a support plate, which is fixedly disposed between the fixed plate and the tool body as a connection and reinforcing rib.

[0013] Preferably, to provide dynamic adaptive support during the linear movement of the needle bar, one end of the diagonal bar is movably hinged to the needle bar, and the other end is movably hinged to the tool body. This double-hinged configuration allows the diagonal bar to swing freely with the reciprocating motion of the needle bar, always maintaining an effective support angle.

[0014] Preferably, as a specific implementation, the pad is fixedly sleeved on the rod body of the pin rod, and the end face of the pad slides against the end face of the guide rod facing the moving mold. This arrangement allows the pad to transmit axial force while also utilizing the end face of the guide rod as an auxiliary guiding surface, further enhancing stability.

[0015] Preferably, the pin bar and the guide rod form a tight sliding guide fit through the first mounting groove. The inner wall of the first mounting groove is precision machined to match the outer diameter of the pin bar, ensuring the axial straightness of the pin bar during high-speed reciprocating motion.

[0016] This utility model has the following beneficial effects:

[0017] 1. This utility model, by setting a composite support and guide structure formed by a diagonal bar, a guide bar and a pad, allows the pin rod to slide through the first mounting groove of the guide bar, and the diagonal bar provides dynamic support. This solves the problem of easy bending and deformation of the demolding pin in the prior art due to its slender structure and uneven stress. It achieves the technical effect of significantly improving the structural rigidity of the pin rod, ensuring stable and reliable demolding action, and extending the service life of the pin.

[0018] 2. This utility model solves the problems of complex installation and inaccurate positioning of key moving parts in the demolding assembly by setting an installation mechanism including a fixed plate, an installation ring and a second installation groove, and fixing it to the tool body with screws and washers, thereby achieving the technical effect of simplifying the assembly process and improving the convenience and stability of installation.

[0019] 3. This utility model provides precise guidance for the pin rod through the first mounting groove of the guide rod, provides dynamic support through the inclined rod, and assists in transmitting axial force through the pad. The three work together to solve the problem of insufficient stability of the ejector pin during high-speed or high-resistance ejection, and achieves the technical effect of simple and compact structure, significant anti-bending effect, and improved overall production efficiency. Attached Figure Description

[0020] Figure 1 This is a front perspective view of a demolding ejector pin anti-bending guide assembly proposed in this utility model;

[0021] Figure 2 This is a top view of a demolding ejector pin anti-bending guide assembly proposed in this utility model;

[0022] Figure 3 This is a partial structural diagram of the moving mold of a demolding ejector pin anti-bending guide assembly proposed in this utility model;

[0023] Figure 4 This is a partial structural diagram of the second sliding rod of a demolding ejector pin anti-bending guide assembly proposed in this utility model.

[0024] Legend:

[0025] 1. Tool body; 2. Installation mechanism; 201. Fixing plate; 202. Second mounting groove; 203. Mounting ring; 204. Support plate; 205. Fixing groove; 206. Screw; 207. Washer; 3. First sliding groove; 4. First sliding rod; 5. Moving mold; 6. Second sliding groove; 7. Second sliding rod; 8. Pin rod; 9. Diagonal rod; 10. First mounting groove; 11. Guide rod; 12. Pad. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0027] Example:

[0028] Please refer to Figures 1 to 4 This utility model embodiment provides a demolding ejector pin anti-bending guide assembly, including a tool body 1, on which a first sliding groove 3 is formed; a first sliding rod 4, which is slidably connected within the first sliding groove 3; and a moving mold 5, which is fixedly connected to the first sliding rod 4. The tool body 1 serves as the mounting base for the entire assembly, and the combined structure of the first sliding rod 4 and the moving mold 5 is used to achieve reciprocating sliding motion under the drive of the tool body 1; Figure 3 As shown, the moving mold 5 has a second sliding groove 6, the second sliding rod 7 is slidably connected in the second sliding groove 6, and the tail of the nail rod 8 is fixedly connected to the second sliding rod 7. The second sliding rod 7 is used to drive the nail rod 8 to achieve the ejection action.

[0029] Please refer to Figure 1 and Figure 3 The assembly includes a diagonal bar 9, which is inclined and has one end movably hinged to the needle bar 8 and the other end movably hinged to the tool body 1. The function of the diagonal bar 9 is to provide dynamic lateral support force when the needle bar 8 slides, so as to resist part of the lateral force generated when it is pushed out, and initially prevent the needle bar 8 from bending. At the same time, the assembly also includes a guide rod 11, which is fixedly connected to the tool body 1. The inner wall of the guide rod 11 is provided with a first mounting groove 10. The needle bar 8 slides through the first mounting groove 10, and the needle bar 8 and the guide rod 11 form a sliding guide engagement through the first mounting groove 10.

[0030] The guide rod 11 provides stable radial limiting and axial guidance for the pin rod 8, ensuring that the pin rod 8 maintains a linear motion trajectory during sliding ejection. In addition, a pad 12 is included, which is fixedly connected to the pin rod 8 and located between the guide rod 11 and the second sliding rod 7. Specifically, the pad 12 is fixedly sleeved on the rod body of the pin rod 8 and slides against the end face of the guide rod 11 facing the moving mold 5. The pad 12 plays a role in transmitting axial force and assisting in guidance when the pin rod 8 moves. This composite structure, in which the inclined rod 9 provides dynamic support, the first mounting groove 10 of the guide rod 11 provides limiting guidance, and the pad 12 provides auxiliary support, strengthens the structural rigidity of the pin rod 8 from multiple dimensions, ensuring the high stability and bending resistance of the pin rod 8 when ejecting from the mold.

[0031] like Figure 1 and Figure 4 As shown, the assembly also includes an installation mechanism 2, which includes a fixing plate 201 and an installation ring 203. The installation ring 203 is fixedly sleeved on the outer wall of the second sliding rod 7. The inner wall of the fixing plate 201 is provided with a second installation groove 202. The installation ring 203 is connected to the fixing plate 201 by snapping into the second installation groove 202. To further fix the entire installation mechanism 2 to the tool body 1, the tool body 1 is provided with a fixing groove 205. The installation mechanism 2 also includes a screw 206 and a washer 207. The screw 206 passes through the washer 207 and the fixing plate 201 in sequence and is connected to the fixing groove 205 by threads, thereby firmly installing the fixing plate 201 on the tool body 1. To enhance the structural stability and support strength after installation, the installation mechanism 2 also includes a support plate 204, which is fixedly disposed between the fixing plate 201 and the tool body 1.

[0032] As another preferred embodiment, in order to enable the diagonal bar 9 to provide dynamic adaptive support when the needle bar 8 moves, one end of the diagonal bar 9 is movably hinged to the needle bar 8, and the other end is movably hinged to the tool body 1. This double-hinged connection method ensures that the diagonal bar 9 can swing flexibly with the linear reciprocating motion of the needle bar 8 and always maintain an effective support state.

[0033] In another preferred embodiment, in order to more accurately guide and disperse the axial force borne by the needle rod 8, the pad 12 is fixedly sleeved on the rod body of the needle rod 8 and slides against the end face of the guide rod 11 facing the moving mold 5. The structure not only provides an additional guiding reference for the movement of the needle rod 8 by utilizing the end face of the guide rod 11, but also disperses the force through the large contact area of ​​the pad 12, reducing the wear on the end of the guide rod 11.

[0034] Working principle: When the demolding action begins, the tool body 1 drives the first sliding rod 4 to slide in the first sliding groove 3. Since the first sliding rod 4 is fixedly connected to the moving mold 5, the moving mold 5 slides synchronously. When the moving mold 5 slides to the predetermined position, the second sliding rod 7 begins to slide in the second sliding groove 6 of the moving mold 5. The tail of the second sliding rod 7 is fixedly connected to the pin rod 8. Therefore, the second sliding rod 7 drives the pin rod 8 to perform the ejection action.

[0035] During the critical process of the pin rod 8 sliding forward to eject the mold, the anti-bending guide structure plays a crucial role: the pin rod 8 slides through the first mounting groove 10 of the guide rod 11, while the guide rod 11 is fixedly connected to the tool body 1. This sliding fit between the guide rod 11 and the pin rod 8 provides the pin rod 8 with stable radial limiting and precise axial guidance. At the same time, the inclined rod 9, which is movably hinged at one end to the pin rod 8 and at the other end to the tool body 1, swings synchronously with the linear movement of the pin rod 8. The inclined rod 9 continuously provides dynamic lateral support force to the pin rod 8 to resist the deflection torque generated during ejection. In addition, the pad 12, which is fixedly sleeved on the pin rod 8, slides against the end face of the guide rod 11 facing the moving mold 5, and plays a role in transmitting axial force and assisting in guidance when the pin rod 8 moves.

[0036] It is through the rigid limiting guide provided by the first mounting groove 10 of the guide rod 11, the dynamic lateral support provided by the inclined rod 9, and the auxiliary support provided by the pad plate 12 that the composite support structure formed by these three works together to ensure that the pin rod 8 can still maintain linear movement when subjected to high ejection resistance, which greatly improves the bending resistance of the pin rod 8 and solves the problem of unstable demolding or damage caused by the thin and easily bent ejector pin in the prior art.

Claims

1. A demolding ejector pin anti-bending guide assembly, comprising: The tool body (1) has a first sliding groove (3) on it. The first sliding rod (4) is slidably connected to the first sliding groove (3); The moving mold (5) is fixedly connected to the first sliding rod (4) and has a second sliding groove (6). The second sliding rod (7) is slidably connected to the second sliding groove (6); The pin rod (8) is fixedly connected to the second sliding rod (7) at its end. The component is characterized in that it further includes a diagonal bar (9), which is inclined to abut against the pin bar (8). The guide rod (11) is fixedly connected to the tool body (1), and the inner wall of the guide rod (11) is provided with a first mounting groove (10), and the nail rod (8) slides through the first mounting groove (10); And a pad (12), which is fixedly connected to the nail rod (8) and located between the guide rod (11) and the second sliding rod (7).

2. The demolding ejector pin anti-bending guide assembly according to claim 1, characterized in that, The component also includes an installation mechanism (2), which includes a fixing plate (201) and an installation ring (203), the installation ring (203) being fixedly sleeved on the outer wall of the second sliding rod (7).

3. The demolding ejector pin anti-bending guide assembly according to claim 2, characterized in that, The inner wall of the fixed plate (201) is provided with a second mounting groove (202), and the mounting ring (203) is engaged in the second mounting groove (202).

4. The demolding ejector pin anti-bending guide assembly according to claim 2, characterized in that, The tool body (1) is provided with a fixing groove (205), and the installation mechanism (2) also includes a screw (206) and a washer (207). The screw (206) passes through the washer (207) and the fixing plate (201) in sequence and is threaded into the fixing groove (205).

5. The demolding ejector pin anti-bending guide assembly according to claim 2, characterized in that, The installation mechanism (2) also includes a support plate (204), which is fixedly disposed between the fixed plate (201) and the tool body (1).

6. The demolding ejector pin anti-bending guide assembly according to claim 1, characterized in that, One end of the diagonal bar (9) is movably hinged to the nail bar (8), and the other end is movably hinged to the tool body (1).

7. The demolding ejector pin anti-bending guide assembly according to claim 1, characterized in that, The pad (12) is fixedly sleeved on the rod of the nail rod (8) and slides against the end face of the guide rod (11) facing the moving mold (5).

8. The demolding ejector pin anti-bending guide assembly according to claim 1, characterized in that, The pin rod (8) is connected to the guide rod (11) via the first mounting groove (10) to form a sliding guide engagement.

Images