A two-stage ejection injection mold

Abstract

The application relates to the technical field of mold production and processing, in particular to a secondary ejection injection mold, which comprises an upper mold and a lower mold, the upper mold and the lower mold are used for mounting and connecting an injection molding machine, a fixed mold plate, a movable mold plate and an ejection plate are arranged between the upper mold and the lower mold, the fixed mold plate, the movable mold plate and the ejection plate are sequentially arranged from top to bottom between the upper mold and the lower mold, a first positioning rod and a second positioning rod are arranged in the injection mold, the first positioning rod and the second positioning rod are located between the fixed mold plate, the movable mold plate and the ejection plate, the first positioning rod and the second positioning rod are used for clamping and positioning a product formed by injection molding, a stop component is additionally arranged between the fixed mold plate and the movable mold plate, and the stop component is used for limiting the separation stroke of the fixed mold plate and the movable mold plate. The application aims to realize smooth and flexible motion transition in the mold opening process, thereby being favorable for significantly prolonging the service life of the mold.

Description

Technical Field

[0001] This application relates to the field of mold manufacturing and processing technology, and in particular to a secondary ejection injection mold. Background Technology

[0002] Molds are a crucial basic process equipment in industrial production, widely used in injection molding, stamping, die casting, and other fields. In existing mold production operations, mold opening and closing are indispensable steps in the cycle.

[0003] In related technologies, modern molding equipment often employs high-speed mold opening to pursue production efficiency. Existing mold opening mechanisms, due to sudden acceleration changes during startup and braking, are prone to generating significant inertial impacts. These impacts not only cause elastic deformation of the mold template, leading to loosening of fastening screws, but also exacerbate wear on guiding components such as guide pillars and guide sleeves, severely impacting the mold's lifespan. Under high clamping force, a huge amount of elastic potential energy accumulates inside the mold. If the release of clamping force is uneven, existing mold opening mechanisms are highly susceptible to producing a "pop" sound, and the instantaneously released energy can cause severe impacts on the equipment and mold. Summary of the Invention

[0004] This application provides a secondary ejection injection mold, aiming to overcome the defects of existing molds, such as large impact vibrations, motion trajectory deviations, and poor demolding stability caused by high-speed movement, uneven force, or fluctuations in the drive system during mold opening. It eliminates the inertial impact at the moment of mold opening and stopping, achieving a smooth and gentle motion transition during mold opening, thereby significantly improving the mold's service life.

[0005] This application provides a secondary ejection injection mold, which adopts the following technical solution: A secondary ejection injection mold includes a top mold and a bottom mold, which are used to install and connect an injection molding machine. A fixed mold plate, a movable mold plate, and an ejector plate are provided between the top mold and the bottom mold. The fixed mold plate, the movable mold plate, and the ejector plate are arranged sequentially from top to bottom between the top mold and the bottom mold. The injection mold has a first positioning rod and a second positioning rod, which are located between the fixed mold plate, the movable mold plate, and the ejector plate. The first positioning rod and the second positioning rod clamp and position the injection molded product. A stop component is added between the fixed mold plate and the movable mold plate to limit the separation stroke of the fixed mold plate and the movable mold plate.

[0006] By adopting the above technical solution, during mold opening, the fixed and moving platens slide away from each other under the drive of the moving platen of the injection molding machine, achieving the first parting of the injection mold. The fixed and moving platens continue to retract until the fixed platen reaches its maximum stroke. Then, the moving platen continues to retract to the mold opening termination position set by the injection molding machine. After it also reaches its maximum stroke, the ejection system of the injection molding machine is activated. At this time, the ejector plate moves forward to push out the injection-molded product, completing the demolding process. By using a stop component to limit the separation stroke of the fixed and moving platens, the inertial impact at the moment of mold opening start and stop can be effectively eliminated, achieving a smooth and gentle motion transition during mold opening, thus significantly improving the mold's service life.

[0007] Preferably, the stop assembly includes a stop plate and a limiting pin. The stop plate is connected to the top mold. A first slot is provided on the stop plate, and a support plate is engaged in the first slot. The limiting pin passes through the top of the support plate in a horizontal direction.

[0008] By adopting the above technical solution, during the specific mold opening process, the fixed template and the moving template are separated from each other. The fixed template drives the top mold and the stop plate to slide synchronously until the stop plate slides to the limit pin. The limit pin limits the stop plate. In this state, the fixed template reaches its maximum stroke and the first separation ends.

[0009] Preferably, the top mold has a second slot on its side, and the stop plate is engaged in the second slot.

[0010] By adopting the above technical solution, the stop plate and the top mold are snapped together using the second slot, which effectively ensures the stability of the connection between the stop plate and the top mold while facilitating the installation and removal of the stop plate.

[0011] Preferably, the side wall of the stop plate is provided with a limiting groove, and the limiting groove and the limiting pin are used to limit the separation of the fixed template and the moving template.

[0012] By adopting the above technical solution, when the fixed template drives the top mold and the stop plate to slide, as the stop plate slides, the limit pin is engaged in the limit groove, thereby allowing the fixed template to reach its maximum stroke and the first separation ends.

[0013] Preferably, a slide rail is installed between the top mold and the bottom mold in the vertical direction.

[0014] By adopting the above technical solution, the slide rail provides stable guidance for the subsequent sliding of the moving mold plate and the ejector plate, thereby effectively ensuring the stability of the moving mold plate and the ejector plate during the sliding process. This helps to overcome defects such as motion trajectory deviation and poor demolding smoothness during mold opening. Furthermore, it effectively ensures a smooth and gentle motion transition during mold opening, significantly improving the service life of the mold.

[0015] Preferably, the slide rails are provided in multiple sets, and the multiple sets of slide rails are evenly distributed between the top mold and the bottom mold.

[0016] By adopting the above technical solution, setting the slide rails to multiple sets can further improve the stability of the moving template and the ejector plate during the mold opening process.

[0017] Preferably, the top of the slide rail is provided with a first guide groove along its length, and the side wall of the moving template is integrally connected with a first guide rod, which is slidably installed in the first guide groove.

[0018] By adopting the above technical solution, the first guide rod slides in the first guide groove during the subsequent separation and sliding process of the moving template. The first guide groove and the first guide rod provide stable guidance for the sliding of the moving template, thereby effectively ensuring the movement trajectory of the moving template in the subsequent mold opening process and achieving a smooth and gentle movement transition during the mold opening process.

[0019] Preferably, a second guide groove is provided at the bottom of the slide rail along its length, and a second guide rod is integrally connected to the side wall of the top plate, the second guide rod being slidably installed in the second guide groove.

[0020] By adopting the above technical solution, the second guide rod slides in the second guide groove during the subsequent separation and sliding process of the ejector plate. The second guide groove and the second guide rod are used to stably guide the sliding of the ejector plate, thereby effectively ensuring the movement trajectory of the ejector plate in the subsequent mold opening process and accurately ejecting the injection-molded product.

[0021] In summary, this application includes at least one of the following beneficial technical effects: 1. During mold opening, driven by the moving platen of the injection molding machine, the fixed platen and the moving platen slide away from each other, achieving the first parting of the injection mold. The fixed and moving platens continue to retract until the fixed platen reaches its maximum stroke. Then, the moving platen continues to retract to the mold opening termination position set by the injection molding machine. After it also reaches its maximum stroke, the ejection system of the injection molding machine is activated. At this time, the ejector plate moves forward to push out the injection-molded product, completing the demolding process. By using a stop component to limit the separation stroke of the fixed and moving platens, the inertial impact at the moment of mold opening and stopping can be effectively eliminated, achieving a smooth and gentle transition during mold opening, thus significantly improving the mold's service life. 2. During the specific mold opening process, as the fixed mold plate and the moving mold plate separate from each other, the fixed mold plate drives the top mold and the stop plate to slide synchronously until the stop plate slides to the limit pin. The limit pin limits the stop plate. In this state, the fixed mold plate reaches its maximum stroke, and the first separation ends. 3. The slide rail provides stable guidance for the subsequent sliding of the moving platen and ejector plate, thus effectively ensuring the stability of the moving platen and ejector plate during the sliding process. This helps to overcome defects such as motion trajectory deviation and poor demolding smoothness during mold opening. Consequently, it effectively ensures a smooth and gentle motion transition during mold opening, significantly extending the mold's service life. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application; Figure 2 This is a structural schematic diagram illustrating the positional relationship between the first positioning rod and the second positioning rod in a specific embodiment of this application; Figure 3 This is a structural schematic diagram illustrating the positional relationship of the limiting grooves in a specific embodiment of this application.

[0023] Reference numerals in the attached drawings: 1. Top mold; 2. Bottom mold; 3. Fixed mold plate; 4. Moving mold plate; 5. Ejector plate; 6. First positioning rod; 7. Second positioning rod; 8. Stop assembly; 81. Stop plate; 82. Limiting pin; 9. First slot; 10. Support plate; 11. Second slot; 12. Limiting groove; 13. Slide rail; 14. First guide groove; 15. First guide rod; 16. Second guide groove; 17. Second guide rod. Detailed Implementation

[0024] The following is in conjunction with the appendix Figure 1 -Appendix Figure 3 This application will be described in further detail below.

[0025] Example: This application discloses a secondary ejection injection mold, referring to... Figure 1 and Figure 2 The injection mold includes a top mold 1 and a bottom mold 2, which are used to install and connect the injection molding machine, fixing the fixed mold portion. A fixed template 3, a movable template 4, and an ejector plate 5 are provided between the top mold 1 and the bottom mold 2, arranged sequentially from top to bottom. Simultaneously, the injection mold contains a first positioning rod 6 and a second positioning rod 7, located between the fixed template 3, the movable template 4, and the ejector plate 5. The injection-molded product is positioned between the first positioning rod 6 and the second positioning rod 7, which clamp and position the injection-molded product to effectively ensure its stability after injection molding.

[0026] During the mold opening process, driven by the moving platen 4 of the injection molding machine, the fixed platen 3 and the moving platen 4 slide away from each other, achieving the first parting of the injection mold. The fixed platen 3 and the moving platen 4 continue to retract until the fixed platen 3 reaches its maximum stroke. Immediately afterwards, the moving platen 4 continues to retract to the mold opening termination position set by the injection molding machine. After it also reaches its maximum stroke, the ejection system of the injection molding machine is activated. At this time, the ejector plate 5 moves forward to push out the injection-molded product, completing the demolding process.

[0027] Reference Figure 1 and Figure 2 A stop component 8 is provided between the fixed template 3 and the moving template 4. During the separation process, the stop component 8 limits the separation stroke of the fixed template 3 and the moving template 4, thereby effectively eliminating the inertial impact at the moment of mold opening and stopping, realizing a smooth and gentle motion transition during mold opening, and thus significantly improving the service life of the mold.

[0028] Specifically, refer to Figure 1 and Figure 2 The stop assembly 8 includes a stop plate 81 and a limiting pin 82. The stop plate 81 is connected to the top mold 1. A first slot 9 is provided on the stop plate 81, and a support plate 10 is engaged in the first slot 9. The limiting pin 82 passes through the top of the support plate 10 in a horizontal direction. During the mold opening process, when the fixed mold plate 3 and the moving mold plate 4 are separating from each other, the fixed mold plate 3 drives the top mold 1 and the stop plate 81 to slide synchronously until the stop plate 81 slides to the limiting pin 82. The limiting pin 82 limits the stop plate 81. In this state, the fixed mold plate 3 reaches its maximum stroke, and the first separation ends.

[0029] Specifically, refer to Figure 1 and Figure 2 The top mold 1 has a second slot 11 on its side end, and the stop plate 81 is snapped into the second slot 11. The second slot 11 is used to snap the stop plate 81 and the top mold 1 together, which effectively ensures the connection stability between the stop plate 81 and the top mold 1, and at the same time facilitates the installation and removal of the stop plate 81.

[0030] Specifically, refer to Figure 1 and Figure 3 The side wall of the stop plate 81 is provided with a limiting groove 12. The limiting groove 12 and the limiting pin 82 are used to limit the separation of the fixed template 3 and the moving template 4.

[0031] When the fixed template 3 drives the top mold 1 and the stop plate 81 to slide, as the stop plate 81 slides, the limit pin 82 is engaged in the limit groove 12, thereby causing the fixed template 3 to reach its maximum stroke and the first separation ends.

[0032] Specifically, refer to Figure 1 and Figure 2 A slide rail 13 is installed vertically between the top mold 1 and the bottom mold 2. The slide rail 13 provides stable guidance for the subsequent sliding of the moving mold plate 4 and the ejector plate 5, thereby effectively ensuring the stability of the moving mold plate 4 and the ejector plate 5 during the sliding process. This helps to overcome defects such as motion trajectory deviation and poor demolding smoothness during mold opening. Furthermore, it effectively ensures a smooth and gentle motion transition during mold opening, significantly improving the service life of the mold.

[0033] Multiple sets of slide rails 13 are evenly distributed between the top mold 1 and the bottom mold 2. Setting multiple sets of slide rails 13 can further improve the stability of the moving mold plate 4 and the ejector plate 5 during the mold opening process.

[0034] Specifically, refer to Figure 1 and Figure 2 A first guide groove 14 is formed on the top of the slide rail 13 along its length. A first guide rod 15 is integrally connected to the side wall of the moving template 4, and the first guide rod 15 is slidably installed in the first guide groove 14. During the subsequent separation and sliding process of the moving template 4, the first guide rod 15 slides in the first guide groove 14. The first guide groove 14 and the first guide rod 15 are used to stably guide the sliding of the moving template 4, thereby effectively ensuring the movement trajectory of the moving template 4 in the subsequent mold opening process and realizing a smooth and gentle movement transition during the mold opening process.

[0035] At the same time, refer to Figure 1 and Figure 2 The bottom of the slide rail 13 has a second guide groove 16 along its length. The side wall of the ejector plate 5 is integrally connected to a second guide rod 17, which is slidably installed in the second guide groove 16. During the subsequent separation and sliding process of the ejector plate 5, the second guide rod 17 slides in the second guide groove 16. The second guide groove 16 and the second guide rod 17 are used to stably guide the sliding of the ejector plate 5, thereby effectively ensuring the movement trajectory of the ejector plate 5 during the subsequent mold opening process and accurately ejecting the injection-molded product.

[0036] The implementation principle of a secondary ejection injection mold in this application embodiment is as follows: The injection mold includes a top mold 1 and a bottom mold 2, which are used to install and connect the injection molding machine, fixing the fixed mold portion. A fixed template 3, a movable template 4, and an ejector plate 5 are located between the top mold 1 and the bottom mold 2, arranged sequentially from top to bottom. Simultaneously, the injection mold contains a first positioning rod 6 and a second positioning rod 7, located between the fixed template 3, the movable template 4, and the ejector plate 5. The injection-molded product is positioned between the first positioning rod 6 and the second positioning rod 7, which clamp and position the injection-molded product to effectively ensure its stability after injection molding.

[0037] During the mold opening process, driven by the moving platen 4 of the injection molding machine, the fixed platen 3 and the moving platen 4 slide away from each other, achieving the first parting of the injection mold. The fixed platen 3 and the moving platen 4 continue to retract until the fixed platen 3 reaches its maximum stroke. Immediately afterwards, the moving platen 4 continues to retract to the mold opening termination position set by the injection molding machine. After it also reaches its maximum stroke, the ejection system of the injection molding machine is activated. At this time, the ejector plate 5 moves forward to push out the injection-molded product, completing the demolding process.

[0038] A slide rail 13 is installed vertically between the top mold 1 and the bottom mold 2. The slide rail 13 provides stable guidance for the subsequent sliding of the moving mold plate 4 and the ejector plate 5, thereby effectively ensuring the stability of the moving mold plate 4 and the ejector plate 5 during the sliding process. This helps to overcome defects such as motion trajectory deviation and poor demolding smoothness during mold opening. Furthermore, it effectively ensures a smooth and gentle motion transition during mold opening, significantly improving the service life of the mold.

[0039] Multiple sets of slide rails 13 are evenly distributed between the top mold 1 and the bottom mold 2. Setting multiple sets of slide rails 13 can further improve the stability of the moving mold plate 4 and the ejector plate 5 during the mold opening process.

[0040] Specifically, a first guide groove 14 is formed on the top of the slide rail 13 along its length, and a first guide rod 15 is integrally connected to the side wall of the moving template 4. The first guide rod 15 is slidably installed in the first guide groove 14. During the subsequent separation and sliding process of the moving template 4, the first guide rod 15 slides in the first guide groove 14. The first guide groove 14 and the first guide rod 15 are used to stably guide the sliding of the moving template 4, thereby effectively ensuring the movement trajectory of the moving template 4 in the subsequent mold opening process and realizing a smooth and gentle movement transition during the mold opening process.

[0041] Meanwhile, a second guide groove 16 is formed at the bottom of the slide rail 13 along its length, and a second guide rod 17 is integrally connected to the side wall of the ejector plate 5. The second guide rod 17 is slidably installed in the second guide groove 16. During the subsequent separation and sliding process of the ejector plate 5, the second guide rod 17 slides in the second guide groove 16. The second guide groove 16 and the second guide rod 17 are used to stably guide the sliding of the ejector plate 5, thereby effectively ensuring the movement trajectory of the ejector plate 5 during the subsequent mold opening process and accurately ejecting the injection-molded product.

[0042] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A secondary ejection injection mold, characterized in that: The injection mold includes a top mold (1) and a bottom mold (2), which are used to install and connect an injection molding machine. A fixed mold plate (3), a movable mold plate (4), and an ejector plate (5) are provided between the top mold (1) and the bottom mold (2). The fixed mold plate (3), the movable mold plate (4), and the ejector plate (5) are arranged sequentially from top to bottom between the top mold (1) and the bottom mold (2). A first positioning rod (6) and a second positioning rod (7) are provided inside the injection mold. The first positioning rod (6) and the second positioning rod (7) are located between the fixed mold plate (3), the movable mold plate (4), and the ejector plate (5). The first positioning rod (6) and the second positioning rod (7) clamp and position the injection molded product. A stop component (8) is added between the fixed mold plate (3) and the movable mold plate (4). The stop component (8) is used to limit the separation stroke of the fixed mold plate (3) and the movable mold plate (4).

2. The secondary ejection injection mold according to claim 1, characterized in that: The stop assembly (8) includes a stop plate (81) and a limiting pin (82). The stop plate (81) is connected to the top mold (1). A first slot (9) is provided on the stop plate (81). A support plate (10) is engaged in the first slot (9). The limiting pin (82) passes through the top of the support plate (10) in the horizontal direction.

3. The secondary ejection injection mold according to claim 2, characterized in that: The top mold (1) has a second slot (11) on its side end, and the stop plate (81) is engaged in the second slot (11).

4. A secondary ejection injection mold according to claim 3, characterized in that: The side wall of the stop plate (81) has a limiting groove (12), and the limiting groove (12) and the limiting pin (82) are used to limit the separation of the fixed template (3) and the moving template (4).

5. A secondary ejection injection mold according to claim 4, characterized in that: A slide rail (13) is installed vertically between the top mold (1) and the bottom mold (2).

6. A secondary ejection injection mold according to claim 5, characterized in that: The slide rails (13) are configured in multiple sets, and the multiple sets of slide rails (13) are evenly distributed between the top mold (1) and the bottom mold (2).

7. A secondary ejection injection mold according to claim 6, characterized in that: The top of the slide rail (13) is provided with a first guide groove (14) along its length direction, and the side wall of the moving template (4) is integrally connected with a first guide rod (15), which is slidably installed in the first guide groove (14).

8. A secondary ejection injection mold according to claim 7, characterized in that: The bottom of the slide rail (13) is provided with a second guide groove (16) along its length direction, and the side wall of the top plate (5) is integrally connected with a second guide rod (17), which is slidably installed in the second guide groove (16).

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