Demolding components for injection molds and injection molds

Abstract

This application discloses a demolding assembly for an injection mold and an injection mold. The demolding assembly includes a moving mold, a stationary mold, a straight top, and a first inclined top. The straight top is movably disposed on one of the moving mold and the stationary mold to switch between an injection position and a demolding position. The straight top is movable along a first direction. The first inclined top is movably disposed on one of the moving mold and the stationary mold. During the switching between the injection position and the demolding position, the first inclined top and the straight top move synchronously. In the demolding position, the first inclined top moves relative to the straight top in a second direction. The straight top and the first inclined top are respectively formed with a first contact surface and a second contact surface that are in contact with each other. The first contact surface and the second contact surface are used to contact the injection molded part in the injection cavity. In the demolding position, the straight top and the first inclined top move to separate the first contact surface and the second contact surface from the injection molded part, which can improve the smoothness of the inclined top's ejection.

Description

Technical Field

[0001] This application relates to the field of mold demolding, and in particular to a demolding component for injection molds and an injection mold. Background Technology

[0002] In related technologies, during the demolding process of injection molded parts with undercut structures, traditional angled ejector mechanisms need to move simultaneously along the demolding direction and laterally to disengage from the undercut. However, the contact surface between the angled ejector and the injection molded part must withstand significant clamping and frictional forces in the initial stage of demolding, resulting in high resistance to the angled ejector movement, easy jamming, and the phenomenon of the injection molded part sticking to the angled ejector, i.e., the sticking of the angled ejector. In existing technologies, although increasing the ejection pressure or surface coating can partially alleviate the problem, it cannot fundamentally optimize the demolding mechanical path. Therefore, how to improve the smoothness of the angled ejector's disengagement has become the technical problem to be solved in this application. Summary of the Invention

[0003] This application aims to at least solve one of the technical problems existing in the prior art. To this end, one object of this application is to provide a demolding assembly for injection molds that can improve the smoothness of ejection of the ejector pins and solve the problem of ejector pins sticking.

[0004] A demolding assembly for an injection mold according to an embodiment of this application includes: a moving mold and a stationary mold, the moving mold and the stationary mold moving relative to each other in a first direction and forming an injection cavity between the moving mold and the stationary mold; a straight top, the straight top being movably disposed on one of the moving mold and the stationary mold to switch between an injection position and a demolding position, the straight top being movable along the first direction; a first inclined top, the first inclined top being movably disposed on one of the moving mold and the stationary mold, the first inclined top moving synchronously with the straight top during the switching between the injection position and the demolding position, and the first inclined top moving relative to the straight top in a second direction in the demolding position; wherein the straight top and the first inclined top are respectively formed with a first contact surface and a second contact surface that are in contact with each other, the first contact surface and the second contact surface being used to contact an injection molded part in the injection cavity, and in the demolding position, the straight top and the first inclined top moving respectively to separate the first contact surface and the second contact surface from the injection molded part.

[0005] According to an embodiment of this application, a demolding component for an injection mold replaces a portion of the original inclined ejector with a straight ejector. The straight ejector and the first inclined ejector work together to eject the injection molded part, optimizing the force distribution during the ejection stage and reducing the possibility of adhesion of the injection molded part during ejection. Then, the separation of the second contact surface is achieved by the individual movement of the first inclined ejector at the demolding position, further reducing the final adhesion force. Finally, the separation of the first contact surface and the injection molded part is achieved by moving the straight ejector. This decomposes the original separation of a single inclined ejector into the separation of the straight ejector and the first inclined ejector, solving the problem of inclined ejector sticking, ensuring smooth ejection of the inclined ejector, improving the demolding efficiency and stability of the injection mold, and promoting high-quality development of injection molding production.

[0006] A demolding assembly for an injection mold according to some embodiments of this application further includes: a delayed core-pulling part, the delayed core-pulling part being movably connected to the straight top, and an elastic element being provided between the delayed core-pulling part and the straight top for controlling the straight top to move along a third direction when switching from the injection position to the demolding position, so as to separate the first contact surface and the second contact surface from the injection molded part.

[0007] According to some embodiments of this application, a demolding assembly for an injection mold has a receiving cavity on its straight top for accommodating the delayed core-pulling portion, the delayed core-pulling portion being disposed within the receiving cavity.

[0008] According to some embodiments of this application, a demolding assembly for an injection mold has a guide portion formed on one of the delayed core-pulling portion and the inner wall of the receiving cavity, and a mating portion that mates with the guide portion is formed on the other of the delayed core-pulling portion and the inner wall of the receiving cavity, wherein the guide portion extends in a third direction and is adapted to limit the movement trajectory of the mating portion.

[0009] A demolding assembly for an injection mold according to some embodiments of this application further includes: a limiting portion extending through at least a portion of the straight top, one end of the limiting portion abutting against a positioning groove formed on the delayed core-pulling portion, the limiting portion being used to limit the movement distance of the straight top in a first direction.

[0010] According to some embodiments of this application, a demolding assembly for an injection mold is provided, wherein the positioning groove and the limiting part are configured as a plurality of spaced-apart and corresponding one-to-one.

[0011] According to some embodiments of this application, a demolding assembly for an injection mold is provided, wherein the elastic element is configured as a spring that contracts or extends in a third direction.

[0012] A demolding assembly for an injection mold according to some embodiments of this application further includes: a push rod passing through one of the moving mold or the stationary mold and connected to the straight top and / or the delayed core-pulling portion, the push rod being adapted to drive the straight top to move in a first direction to switch the injection position and the demolding position.

[0013] A demolding assembly for an injection mold according to some embodiments of this application further includes: a second inclined top, the second inclined top being movably disposed on one of the moving mold and the stationary mold, the second inclined top abutting against the first inclined top, the second inclined top moving synchronously with the first inclined top during the switching between the injection position and the demolding position, and the second inclined top moving relative to the straight top in a second direction in the demolding position.

[0014] The following is a brief description of the injection mold according to an embodiment of this application.

[0015] The injection mold according to the embodiments of this application includes the demolding component of any of the above embodiments. Since the injection mold according to this embodiment is provided with the demolding component of any of the above embodiments, the injection mold according to this application has the ability to demold quickly, which greatly shortens the demolding time of a single product, reduces the number of downtimes, makes production continuous and stable, and improves the overall production efficiency. The smooth and orderly demolding method avoids excessive pulling and squeezing of the injection molded parts, effectively protects the integrity and appearance of the product, ensures the product size and shape accuracy, reduces the defect rate, and ensures smooth ejection of the inclined ejector. The mold is subjected to uniform force, reduces wear, extends service life, and reduces replacement and maintenance costs. At the same time, it reduces manual intervention and lowers labor costs.

[0016] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0017] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0018] Figure 1 This is a three-dimensional structural schematic diagram of a demolding assembly for an injection mold according to an embodiment of this application;

[0019] Figure 2 This is a cross-sectional structural diagram of the mold release assembly for an injection mold and the molded part according to an embodiment of this application;

[0020] Figure 3 yes Figure 1 Enlarged structural diagram at point A in the middle;

[0021] Figure 4This is an exploded structural diagram of the ejector block, delayed core-pulling part, and push rod of the demolding assembly for an injection mold according to an embodiment of this application;

[0022] Figure 5 This is a top view of the ejector block, delayed core-pulling part, and push rod of the demolding assembly for an injection mold according to an embodiment of this application;

[0023] Figure 6 yes Figure 4 Schematic diagram of the cross-sectional structure of the middle BB section;

[0024] Figure 7 yes Figure 4 Schematic diagram of the CC cross-section structure.

[0025] Figure label:

[0026] 100. Demolding assembly;

[0027] 1. Moving mold; 11. Injection molded parts;

[0028] 2. Straight top; 21. First contact surface; 22. Receiving cavity; 23. Fitting part; 24. Through hole;

[0029] 3. First sloping top; 31. Second contact surface;

[0030] 4. Delayed core-pulling part; 41. Elastic element; 42. Guide part; 43. Positioning groove; 44. Stop part;

[0031] 5. Limiting part;

[0032] 6. Push rod;

[0033] 7. The second sloping top. Detailed Implementation

[0034] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0035] The following is for reference. Figures 1-7 Describes a demolding assembly 100 for an injection mold according to an embodiment of this application.

[0036] A demolding assembly 100 for an injection mold according to an embodiment of this application includes a moving mold 1, a stationary mold, a straight top 2, and a first inclined top 3. The moving mold 1 and the stationary mold move relative to each other in a first direction, and an injection cavity is formed between the moving mold 1 and the stationary mold. The straight top 2 is movably disposed on one of the moving mold 1 and the stationary mold to switch between an injection position and a demolding position. The straight top 2 is movable along the first direction. The first inclined top 3 is movably disposed on one of the moving mold 1 and the stationary mold. During the switching between the injection position and the demolding position, the first inclined top 3 moves synchronously with the straight top 2. In the demolding position, the first inclined top 3 moves relative to the straight top 2 in a second direction. A first contact surface 21 and a second contact surface 31 are respectively formed on the straight top 2 and the first inclined top 3. The first contact surface 21 and the second contact surface 31 are used to contact the injection molded part 11 in the injection cavity. In the demolding position, the straight top 2 and the first inclined top 3 move to separate the first contact surface 21 and the second contact surface 31 from the injection molded part 11.

[0037] It should be noted that the first direction is the ejection direction of the top 2, and the second direction is any direction that forms an angle with the first direction.

[0038] In related technologies, during the demolding process of injection molded parts 11 with undercut structures, traditional angled ejector mechanisms need to move simultaneously along the demolding direction and laterally to detach from the undercut. The traditional angled ejector independently handles the demolding of the undercut portion. Due to the inclined surface of the traditional angled ejector, the injection molded part 11 adheres tightly to it during molding, resulting in a significant component of the adhesion force between the injection molded part 11 and the traditional angled ejector in the inclined direction. This uneven distribution of adhesion force causes the injection molded part 11 to easily and firmly adhere to the angled ejector during demolding. During the ejection process, the strong adhesion force becomes an obstacle, not only making the movement of the angled ejector difficult and hindering successful demolding, but also potentially causing product deformation and damage, severely impacting injection molding production efficiency and product quality, increasing the defect rate and production costs.

[0039] In the embodiments of this application, the straight top 2 can move on either the moving mold 1 or the stationary mold, with the direction of movement being the first direction. During injection molding, it is in the injection position, maintaining the stability of the injection cavity together with the first inclined top 3. During the switching between the injection position and the demolding position, the straight top 2 moves along the first direction, cooperating with the first inclined top 3 to eject the injection molded part 11 from either the moving mold 1 or the stationary mold. The first inclined top 3 is also movably disposed on either the moving mold 1 or the stationary mold. During the switching between the injection position and the demolding position, it moves synchronously with the straight top 2 to eject the injection molded part 11 together. When it reaches the demolding position, the first inclined top 3 moves relative to the straight top 2 in the second direction. The second contact surface 31 of the first inclined top 3 in contact with the injection molded part 11 and the first contact surface 21 of the straight top 2 are connected to each other, forming a contact interface with the injection molded part 11.

[0040] During the demolding process, the straight ejector 2 and the first inclined ejector 3 work together to eject the injection molded part 11. The straight ejector 2 and the first inclined ejector 3 move synchronously along the first direction, providing a stable and uniform ejection force for the injection molded part 11. This coordinated ejection method optimizes the force distribution during the ejection stage and avoids the situation where the local force is too large due to the inclined structure of the traditional single inclined ejector, and the injection molded part 11 is prone to deformation or adhesion due to uneven force. This component effectively avoids such problems and greatly reduces the possibility of adhesion of the injection molded part 11 during ejection.

[0041] When the demolding position is reached, the first inclined top 3 moves independently relative to the straight top 2 in the second direction, achieving separation of the second contact surface 31 from the injection molded part 11. At this time, due to the previous coordinated ejection by the straight top 2 and the first inclined top 3, most of the injection molded part 11 has been ejected from the mold, and the adhesion between the injection molded part 11 and the mold is greatly reduced. Therefore, the movement of the first inclined top 3 in the second direction only needs to overcome the remaining small adhesion force to successfully complete the separation action between the second contact surface 31 and the injection molded part 11, further reducing the final adhesion force.

[0042] Finally, by moving the straight top 2 again, the first contact surface 21 and the injection molded part 11 are separated. The demolding process, which originally relied on a single inclined top, is decomposed into the sequential separation operation of the straight top 2 and the first inclined top 3. This effectively solves the long-standing problem of inclined top sticking in the injection molding industry, ensuring that the inclined top can be smoothly ejected. This not only improves the demolding efficiency of injection molds and reduces the production downtime caused by poor demolding, but also enhances the stability of the demolding process, reduces the probability of product defects caused by demolding problems, and promotes the development of injection molding production towards high quality.

[0043] In short, according to an embodiment of this application, a demolding component 100 for an injection mold replaces a portion of the original inclined ejector with a straight ejector 2. The straight ejector 2 and the first inclined ejector 3 work together to eject the injection molded part 11, optimizing the force distribution during the ejection stage and reducing the possibility of adhesion of the injection molded part 11 during ejection. Then, the second contact surface 31 is separated by the individual movement of the first inclined ejector 3 at the demolding position, further reducing the final adhesion force. Finally, the first contact surface 21 and the injection molded part 11 are separated by moving the straight ejector 2. This decomposes the original single inclined ejector into the separation of the straight ejector 2 and the first inclined ejector 3, solving the problem of inclined ejector sticking, ensuring smooth ejection of the inclined ejector, improving the demolding efficiency and stability of the injection mold, and powerfully promoting the high-quality development of injection molding production.

[0044] According to some embodiments of this application, the demolding assembly 100 for injection molds further includes a delayed core-pulling part 4, which is movably connected to the straight top 2. An elastic element 41 is provided between the delayed core-pulling part 4 and the straight top 2 for controlling the straight top 2 to move along a third direction when switching from the injection position to the demolding position, so that the first contact surface 21 and the second contact surface 31 are separated from the injection molded part 11.

[0045] It should be noted that the third direction is perpendicular to the first direction.

[0046] In the initial stage of switching from the injection position to the demolding position, the adhesion between the injection part 11 and the mold and the demolding resistance are high. If the straight ejector 2 moves directly and quickly, it is easy to damage the injection part 11. At this time, the elastic element 41 stores energy under pressure, and the delayed core-pulling part 4 restricts its movement speed by connecting with the straight ejector 2, which has a buffering effect. This makes demolding smoother, giving the injection part 11 time to gradually detach from the mold surface and reducing the risk of deformation caused by excessive instantaneous force. As demolding progresses, the elastic element 41 releases energy and controls the straight ejector 2 to move along a third direction, which is perpendicular to the first direction. The movement of the straight ejector 2 in this direction allows the first contact surface 21 to separate from the injection part 11, avoiding local stress concentration and ensuring that the injection part 11 is subjected to uniform force during demolding. Through the cooperation of the delayed core-pulling part 4 and the elastic element 41, the movement of the straight ejector 2 is controlled, making the separation of the first and second contact surfaces from the injection part 11 smoother, reducing the possibility of sticking to the mold, and improving the demolding success rate. At the same time, the damage to the injection part 11 is reduced, the product quality is improved, the defect rate is reduced, and thus the production efficiency and economic benefits are improved.

[0047] According to some embodiments of this application, a demolding assembly 100 for an injection mold has a receiving cavity 22 on its top 2 for accommodating a delayed core-pulling part 4, the delayed core-pulling part 4 being disposed within the receiving cavity 22.

[0048] A receiving cavity 22 is provided on the top 2 to accommodate the delayed core-pulling part 4, making the connection between the two more compact. The integrated design avoids additional space occupation. Compared with installing the delayed core-pulling part 4 independently in other positions of the mold, it greatly saves the internal space of the mold. In injection molds, the internal space is limited, and the efficient use of space is crucial to the rationality of the overall layout and design of the mold. The compact structural layout can also reduce the size and weight of the mold, reduce the manufacturing cost of the mold, and facilitate the installation and maintenance of the mold. Placing the delayed core-pulling part 4 in the receiving cavity 22 can protect the delayed core-pulling part 4. During the injection molding process, the internal environment of the mold is complex, with factors such as high temperature, high pressure, and impact from the injection material. The receiving cavity 22 can prevent the delayed core-pulling part 4 from being directly affected by these adverse factors, avoiding damage to it, thereby ensuring the delayed core-pulling part 4. The delayed core-pulling part 4 can work normally, improving its service life. Moreover, the receiving cavity 22 provides a stable support structure for the delayed core-pulling part 4, preventing it from shaking or shifting during operation. This ensures the stability of the relative position between the delayed core-pulling part 4 and the straight top 2, thereby guaranteeing the accuracy and reliability of the entire demolding process. The tight arrangement makes the connection between the delayed core-pulling part 4 and the straight top 2 more stable, and the force transmission between them more direct and efficient. When switching from the injection position to the demolding position, the delayed core-pulling part 4 and the straight top 2 can move more coordinatedly. The elastic element 41 can better play its role in the receiving cavity 22, accurately controlling the movement of the straight top 2 along the third direction, realizing the smooth separation of the first contact surface 21 from the injection molded part 11. This can reduce jamming and abnormal situations during the demolding process, further improving the efficiency and quality of demolding.

[0049] According to some embodiments of this application, a demolding assembly 100 for an injection mold has a guide portion 42 formed on one of the inner walls of the delayed core-pulling portion 4 and the receiving cavity 22, and a mating portion 23 that mates with the guide portion 42 is formed on the other of the inner walls of the delayed core-pulling portion 4 and the receiving cavity 22, wherein the guide portion 42 extends in a third direction and is adapted to limit the movement trajectory of the mating portion 23.

[0050] The guide portion 42 extends along a third direction and restricts the movement trajectory of the mating portion 23, making the movement of the delayed core-pulling portion 4 within the receiving cavity 22 more precise. When switching from the injection position to the demolding position, the delayed core-pulling portion 4 needs to move according to a specific trajectory and speed to accurately control the movement of the straight top 2 along the third direction, thereby achieving proper separation of the first contact surface 21 and the second contact surface 31 from the injection molded part 11. Without the restriction of the guide portion 42 and the mating portion 23, the delayed core-pulling portion 4 may deviate or wobble, resulting in unstable movement of the straight top 2 and affecting the demolding effect. Now, by restricting the mating portion 23 through the guide portion 42, it can be ensured that the delayed core-pulling portion 4 always moves smoothly along the predetermined third direction, ensuring the accuracy and reliability of the entire demolding action. The cooperation between the guide portion 42 and the mating portion 23 can enhance the stability of the delayed core-pulling portion 4 within the receiving cavity 22. During the operation of the injection mold, it will be subjected to various forces, such as injection pressure and mechanical vibration. These external forces may cause the delayed core-pulling portion 4 to move within the receiving cavity 22. If displacement or shaking occurs within the cavity 22, affecting its coordinated operation with the straight top 2, the guide part 42 and the mating part 23 work together to effectively resist these external forces, ensuring that the delayed core pulling part 4 maintains a stable position and posture within the receiving cavity 22. Even in complex working environments, this ensures the normal operation of the delayed core pulling part 4, providing stable control for the straight top 2 and further guaranteeing the smooth progress of the demolding process. The cooperation between the guide part 42 and the mating part 23 reduces friction and wear between them. When the delayed core pulling part 4 and the straight top 2 move relative to each other, it avoids irregular friction with the inner wall of the receiving cavity 22, which would lead to increased wear and shorten the service life of the components. The guide part 42 guides the mating part 23 to move along a specific trajectory, making the contact between them more uniform and stable, reducing unnecessary friction points and friction forces, reducing the degree of wear on the components, and also reducing the pollution of the internal environment of the mold by debris generated by wear. This extends the service life of the delayed core pulling part 4 and the entire demolding assembly 100, and reduces maintenance costs.

[0051] According to some embodiments of this application, a demolding assembly 100 for an injection mold further includes a limiting portion 5, which extends through at least a portion of the straight top 2, and one end of the limiting portion 5 abuts against a positioning groove 43 formed on the delayed core-pulling portion 4. The limiting portion 5 is used to limit the movement distance of the straight top 2 in a first direction.

[0052] The limiting part 5 penetrates at least a portion of the straight top 2 and abuts against the positioning groove 43 on the delayed core pulling part 4, precisely limiting the movement distance of the straight top 2 in the first direction. During demolding, the movement distance of the straight top 2 needs to be precisely controlled. If the distance is too short, the injection molded part 11 cannot completely detach from the mold; if the distance is too long, it may damage the injection molded part 11 or the mold. The limiting part 5, in cooperation with the positioning groove 43, ensures that the straight top 2 moves to the appropriate position, so that the first contact surface 21 and the second contact surface 31 separate from the injection molded part 11 just right, ensuring the demolding effect and optimizing the entire demolding process. While restricting the movement of the straight top 2, the limiting part 5 strengthens the coordination between the delayed core pulling part 4 and the straight top 2. When the delayed core pulling part 4 controls the straight top 2 to move along a third direction through the elastic element 41, the limiting part 5 can ensure that the movement of the straight top 2 meets the demolding requirements and does not exceed a reasonable range, so that the delayed core pulling part 4 and the straight top 2 cooperate more smoothly in the entire demolding process, and the actions between the components are more coordinated and consistent, improving the working efficiency and stability of the demolding assembly 100 and ensuring the smooth progress of injection molding production.

[0053] In some embodiments of this application, a through hole 24 that cooperates with the limiting part 5 is provided on the top straight part 2.

[0054] According to some embodiments of this application, the demolding assembly 100 for injection molds has a plurality of positioning grooves 43 and limiting parts 5 arranged at intervals and corresponding one-to-one.

[0055] Multiple spaced and corresponding positioning slots 43 and limiting parts 5 provide more precise control options for the demolding process. During the demolding of the injection molded part 11, the required moving distance of the straight top 2 may vary at different stages. For injection molded parts 11 with complex structures, a smaller amount of movement may be required in the early stages of demolding to avoid damage to some delicate parts. As demolding progresses, a larger amount of movement is required to complete the overall demolding. Through the cooperation of multiple positioning slots 43 and limiting parts 5, precise control of the moving distance of the straight top 2 at different stages can be achieved. The limiting parts 5 abut against the positioning slots 43 at different positions in sequence, thereby realizing multi-level demolding control, meeting the diverse needs of the complex demolding process of the injection molded part 11, and greatly improving the demolding accuracy and adaptability to different structures of the injection molded part 11.

[0056] According to some embodiments of this application, a demolding assembly 100 for an injection mold has an elastic element 41 configured as a spring that contracts or extends in a third direction.

[0057] The contraction and extension of the spring in the third direction ensures that the force exerted on the straight nozzle 2 is aligned with the demolding direction, thus achieving precise control of force and speed during demolding. When switching from the injection position to the demolding position, the spring is in a contracted state. When the distance the straight nozzle 2 moves in the first direction exceeds the limit of the moving mold 1, the spring extends, providing a direct and stable pushing force for the straight nozzle 2 to move in the third direction. For injection molded parts 11 of different sizes, shapes, and materials, the required demolding force and speed vary. For thin-walled and finely structured injection molded parts 11, a smaller and steadily increasing demolding force is required to prevent deformation or damage during demolding. In this case, a spring with a smaller stiffness coefficient can be selected, and its initial compression can be appropriately adjusted so that the spring slowly and evenly pushes the straight nozzle 2 during extension, ensuring that the injection molded part 11 can be demolded smoothly under gentle force. For injection molded parts 11 with complex structures and strong adhesion to the mold, springs with high stiffness coefficients can be used, and the initial compression can be increased to provide a sufficiently strong demolding force at the moment of demolding, overcoming the adhesion between the injection molded part 11 and the mold, and achieving efficient demolding. This precise control capability greatly improves the stability and reliability of the demolding process and reduces the product defect rate caused by improper demolding.

[0058] In some embodiments of this application, a stop portion 44 extending in a second direction is provided on the delayed core-pulling portion 4, the stop portion 44 abutting against the spring, wherein the stop portion 44 is connected to the delayed core-pulling portion 4 by bolts.

[0059] According to some embodiments of this application, a demolding assembly 100 for an injection mold further includes a push rod 6, which passes through one of the moving mold 1 or the stationary mold and is connected to the straight top 2 and / or the delayed core-pulling portion 4. The push rod 6 is adapted to drive the straight top 2 to move in a first direction to switch the injection position and the demolding position.

[0060] The push rod 6 passes through the moving mold 1 or the stationary mold and is connected to the straight top 2, or the push rod 6 passes through the moving mold 1 or the stationary mold and is connected to the delayed core pulling part 4, or the push rod 6 passes through the moving mold 1 or the stationary mold and is connected to the straight top 2 and the delayed core pulling part 4, providing a direct and stable driving force for the movement of the straight top 2 in the first direction. During the operation of the injection mold, the setting of the push rod 6 enables the external drive device to accurately control the moving distance and speed of the straight top 2, ensuring that it completes the action at the appropriate time and position. When switching from the injection position to the demolding position, the push rod 6 can push the straight top 2 to move at a constant speed according to the preset program or control signal, avoiding the problem of damage to the injection molded part 11 or incomplete demolding due to the moving speed being too fast or too slow.

[0061] In some embodiments of this application, the push rod 6 passes through the moving mold 1 and is bolted to the delayed core-pulling part 4.

[0062] According to some embodiments of this application, the demolding assembly 100 for an injection mold further includes a second inclined top 7, which is movably disposed on one of the moving mold 1 and the stationary mold. The second inclined top 7 abuts against the first inclined top 3. During the switching between the injection position and the demolding position, the second inclined top 7 and the first inclined top 3 move synchronously. In the demolding position, the second inclined top 7 moves relative to the straight top 2 in a second direction.

[0063] In traditional injection mold demolding processes, a single angled ejector may experience demolding difficulties due to the large demolding force. In this embodiment, a second angled ejector 7 is added, and the second angled ejector 7 abuts against the first angled ejector 3, moving synchronously during the switching between the injection and demolding positions. The demolding force originally borne solely by the first angled ejector 3 is distributed between the first angled ejector 3 and the second angled ejector 7. When the injection molded part 11 has a large undercut structure or strong adhesion to the mold, the two angled ejectors work together, resulting in a more balanced demolding force on the injection molded part 11 during demolding. This balanced force distribution avoids deformation or damage to the injection molded part 11 caused by excessive localized force, improving the smoothness of demolding. During demolding, there is friction between the angled ejectors and the injection molded part 11. Due to the addition of the second angled ejector 7, the contact area between the first angled ejector 3 and the second angled ejector 7 and the injection molded part 11 is relatively reduced, thus reducing the friction force on each angled ejector compared to a single angled ejector. Moreover, the synchronous movement of the two sloping tops allows the injection molded part 11 to leave the mold more smoothly during the demolding process, reducing the jamming caused by friction and further improving the smoothness of demolding.

[0064] The following is a brief description of the injection mold according to an embodiment of this application.

[0065] The injection mold according to the embodiments of this application includes the demolding component 100 of any of the above embodiments. Since the injection mold according to this embodiment is provided with the demolding component 100 of any of the above embodiments, the injection mold according to this application has the ability to demold quickly, which greatly shortens the demolding time of a single product, reduces the number of downtimes, makes production continuous and stable, and improves the overall production efficiency. The smooth and orderly demolding method avoids excessive pulling and squeezing of the injection molded part 11, effectively protects the integrity and appearance of the product, ensures the product size and shape accuracy, reduces the defect rate, and allows the inclined ejector to eject smoothly. The mold is subjected to uniform force, reduces wear, extends service life, and reduces replacement and maintenance costs. At the same time, it reduces manual intervention and lowers labor costs.

[0066] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application.

[0067] In the description of this application, "first feature" and "second feature" may include one or more of the features.

[0068] In the description of this application, "multiple" means two or more.

[0069] In the description of this application, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or it may include the first and second features not being in direct contact but being in contact through another feature between them.

[0070] In the description of this application, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0071] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0072] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A demolding assembly for injection molds, characterized in that, include: A moving mold (1) and a stationary mold, wherein the moving mold (1) and the stationary mold move relative to each other in a first direction and an injection cavity is formed between the moving mold (1) and the stationary mold; A straight top (2) is movably disposed on one of the moving mold (1) and the stationary mold to switch between an injection position and a demolding position, and the straight top (2) is movable along a first direction; The first inclined top (3) is movably disposed on one of the moving mold (1) and the stationary mold. During the switching between the injection position and the demolding position, the first inclined top (3) moves synchronously with the straight top (2). In the demolding position, the first inclined top (3) moves relative to the straight top (2) in a second direction. The straight top (2) and the first inclined top (3) are respectively formed with a first contact surface (21) and a second contact surface (31) that are in contact with each other. The first contact surface (21) and the second contact surface (31) are used to contact the injection molded part (11) in the injection cavity. In the demolding position, the straight top (2) and the first inclined top (3) move to separate the first contact surface (21) and the second contact surface (31) from the injection molded part (11). The delayed core-pulling part (4) is movably connected to the straight top (2). An elastic element (41) is provided between the delayed core-pulling part (4) and the straight top (2) for controlling the straight top (2) to move along a third direction when switching from the injection position to the demolding position, so that the first contact surface (21) and the second contact surface (31) are separated from the injection molded part (11). The straight top (2) is provided with a receiving cavity (22) for accommodating the delayed core-pulling part (4). The delayed core-pulling part (4) is disposed in the receiving cavity (22). A guide part (42) is formed on one of the inner walls of the delayed core-pulling part (4) and the receiving cavity (22). A mating part (23) that cooperates with the guide part (42) is formed on the other inner wall of the delayed core-pulling part (4) and the receiving cavity (22). A push rod (6) passes through one of the moving mold (1) or the stationary mold and is connected to the delayed core-pulling part (4). The push rod (6) is adapted to drive the straight top (2) to move in a first direction to switch the injection position and the demolding position.

2. The demolding assembly for injection molds according to claim 1, characterized in that, Also includes: The limiting part (5) extends through at least a portion of the straight top (2), and one end of the limiting part (5) abuts against the positioning groove (43) formed on the delayed core pulling part (4). The limiting part (5) is used to limit the movement distance of the straight top (2) in a first direction.

3. The demolding assembly for injection molds according to claim 2, characterized in that, The positioning groove (43) and the limiting part (5) are configured as multiple spaces that are spaced apart and correspond one-to-one.

4. The demolding assembly for injection molds according to claim 1, characterized in that, The elastic element (41) is constructed as a spring, which contracts or extends in the third direction.

5. The demolding assembly for an injection mold according to any one of claims 1-4, characterized in that, Also includes: The second inclined top (7) is movably disposed on one of the moving mold (1) and the stationary mold. The second inclined top (7) abuts against the first inclined top (3). During the switching between the injection position and the demolding position, the second inclined top (7) moves synchronously with the first inclined top (3). In the demolding position, the second inclined top (7) moves relative to the straight top (2) in a second direction.

6. An injection mold, characterized in that, Includes the demolding component (100) as described in any one of claims 1-5.

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