Secondary ejection mechanism for rubber molds

Abstract

The utility model relates to rubber mould technical field especially relates to a secondary ejection mechanism for rubber mould, include: base, core is fixedly installed in the base top, primary ejection subassembly, including power device and by power device drive's first ejector, secondary ejection subassembly, including the second ejector of sliding setting in the core, linkage conversion mechanism is set up in the base and is connected respectively power device's output with the second ejector, wherein, when power device starts, first drive the first ejector executes first time ejection action, when power device continues to run, through linkage conversion mechanism drive the second ejector executes second time ejection action, compared with prior art, the utility model realizes secondary ejection action through single power source cooperation linkage conversion mechanism, greatly simplifies the mechanism structure, reduced manufacturing cost, simultaneously makes the product stress even through step by step push design.

Description

Technical Field

[0001] This utility model relates to the field of rubber mold technology, and in particular to a secondary ejection mechanism for rubber molds. Background Technology

[0002] After rubber products (such as sealing rings, rubber sleeves, etc.) are molded, they need to be removed from the mold cavity by an ejection mechanism. In the existing technology, the single ejection mechanism is widely used because of its simple structure. However, for thin-walled, complex-shaped or highly viscous rubber products, the use of this type of mechanism is prone to product deformation, sticking to the mold, or even tearing, which directly leads to a decrease in the product qualification rate.

[0003] To address the shortcomings of primary ejection mechanisms, secondary ejection mechanisms have emerged. However, existing secondary ejection mechanisms often employ dual power sources (such as dual cylinders or cylinder + motor) or complex cam transmission structures. These not only suffer from high costs and difficulties in synchronous control, but also face issues such as severe transmission wear and inconvenient maintenance, making them unsuitable for the mass production needs of small and medium-sized rubber molds. Summary of the Invention

[0004] To address the technical problems existing in the background art, this utility model proposes a secondary ejection mechanism for rubber molds.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A secondary ejection mechanism for a rubber mold, comprising: Base; The core is fixedly installed on the top of the base; A primary ejection assembly includes a power unit and a first ejector driven by the power unit; The secondary ejection assembly includes a second ejector component that is slidably disposed within the core; A linkage conversion mechanism is disposed within the base and is respectively connected to the output end of the power device and the second ejector. When the power device is started, it first drives the first ejector to perform the first ejection action; when the power device continues to run, it drives the second ejector to perform the second ejection action through the linkage conversion mechanism.

[0006] Furthermore, the power unit is a cylinder, and the primary ejection assembly also includes a mounting plate and a mounting rod; The cylinder is fixedly installed at the bottom of the base, and its piston rod passes through the first opening on the base and is connected to the mounting plate; the lower end of the mounting rod is fixedly connected to the mounting plate, and the upper end is fixedly connected to the push plate, which serves as the first ejector.

[0007] Furthermore, the linkage conversion mechanism includes a linkage block and a diagonal rod; the linkage block is horizontally slidably mounted on the mounting plate, one end of the linkage block is provided with an inclined surface, and the middle is provided with an inclined groove; the diagonal rod is fixedly connected to the base and slidably passes through the inclined groove; The second ejector is a push rod, which slides through the through hole in the core. The bottom end of the push rod passes through the second opening at the top of the base and slides in cooperation with the inclined surface of the linkage block.

[0008] Furthermore, the secondary ejection assembly also includes a top block and a spring; The top of the push rod is connected to the top block, and the top of the core is provided with a storage groove to accommodate the top block; The spring is sleeved on the push rod, and the two ends of the spring elastically abut against the bottom surface of the core and the shoulder provided on the push rod, respectively.

[0009] Furthermore, a roller is installed at the bottom end of the push rod, and the roller rolls in contact with the inclined surface of the linkage block.

[0010] Furthermore, the top of the mounting plate is provided with a guide rail along the horizontal sliding direction, and the bottom of the linkage block is provided with a sliding groove that is adapted to the sliding of the guide rail. The cross-sectional area of ​​the guide rail increases in the vertical upward direction.

[0011] Furthermore, a clearance groove is provided on the mounting plate directly below the diagonal rod.

[0012] Compared with the prior art, the beneficial effects of this utility model are: Compared with existing technologies, this utility model achieves secondary ejection by using a single power source in conjunction with a linkage conversion mechanism, which greatly simplifies the mechanism structure and reduces manufacturing costs. At the same time, the step-by-step ejection design ensures uniform force on the product and a smooth ejection process, effectively avoiding problems such as product deformation, sticking to the mold, or tearing, and improving product molding quality. The flexible combination of various additional features can adapt to different types of rubber products such as thin-walled, soft, and complex shapes. Moreover, the structure is compact, the transmission is reliable, and the maintenance is convenient. It is suitable for the mass production needs of small and medium-sized rubber molds and has broad application prospects. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the secondary ejection mechanism for rubber molds proposed in this utility model; Figure 2 This is a schematic diagram of the secondary ejection mechanism for rubber molds proposed in this utility model in its first state. Figure 3 This is a schematic diagram of the secondary ejection mechanism for rubber molds proposed in this utility model in its second state. Figure 4 This is a cross-sectional view of the linkage block in the secondary ejection mechanism for rubber molds proposed in this utility model.

[0014] In the diagram: 1-base, 101-first opening, 102-second opening, 2-mounting plate, 201-guide rail, 202-avoiding groove, 3-mounting rod, 4-push plate, 5-core, 501-through hole, 502-storage groove, 6-cylinder, 7-linkage block, 701-sloping surface, 702-sloping groove, 703-sliding groove, 8-sloping rod, 9-push rod, 901-roller, 902-shoulder, 10-spring, 11-top block. Detailed Implementation

[0015] 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.

[0016] like Figures 1-4 As shown, this embodiment provides a secondary ejection mechanism for a rubber mold, including: Base 1; Core 5 is fixedly installed on the top of the base 1; A primary ejection assembly includes a power unit and a first ejector driven by the power unit; The secondary ejection assembly includes a second ejector component that is slidably disposed within the core 5; A linkage conversion mechanism is provided inside the base 1 and is respectively connected to the output end of the power device and the second ejector. When the power device is started, it first drives the first ejector to perform the first ejection action; when the power device continues to run, it drives the second ejector to perform the second ejection action through the linkage conversion mechanism.

[0017] The power unit is a cylinder 6, and the primary ejection assembly also includes a mounting plate 2 and a mounting rod 3; The cylinder 6 is fixedly installed at the bottom of the base 1, and its piston rod passes through the first opening 101 on the base 1 and is connected to the mounting plate 2; the lower end of the mounting rod 3 is fixedly connected to the mounting plate 2, and the upper end is fixedly connected to the push plate 4, which serves as the first ejector.

[0018] The linkage conversion mechanism includes a linkage block 7 and a diagonal rod 8; the linkage block 7 is horizontally slidably installed on the mounting plate 2, one end of the linkage block 7 is provided with a slope 701, and the middle is provided with a diagonal groove 702; the diagonal rod 8 is fixedly connected to the base 1 and slides through the diagonal groove 702. The second ejector is a push rod 9, which slides through the through hole 501 on the core 5. The bottom end of the push rod 9 passes through the second opening 102 opened on the top of the base 1 and slides in cooperation with the inclined surface 701 of the linkage block 7.

[0019] Overall, the base 1 is a rectangular block structure made of No. 45 steel, with a flat mounting surface on the top and a first opening 101 (for the piston rod of cylinder 6 to pass through) and a second opening 102 (for the push rod 9 to pass through) in the middle. The core 5 is fixed to the top of the base 1 by internal hex bolts. The core 5 is a molded part that is adapted to the cavity of the rubber product, and its sidewall is slidably fitted with the push plate 4. The primary ejection assembly includes a cylinder 6 (power unit), a mounting plate 2, a mounting rod 3, and a push plate 4 (first ejector); the cylinder 6 is fixed to the bottom of the base 1 by bolts, and the top of the piston rod is welded to the mounting plate 2; the mounting rod 3 is evenly distributed around the mounting plate 2, with its lower end welded to the mounting plate 2 and its upper end passing through the core 5 and bolted to the push plate 4. The secondary ejection assembly includes a push rod 9 (second ejector), and the core 5 has a through hole 501 that is clearance-fitted with the push rod 9. The push rod 9 slides through the through hole 501 and extends to the interior of the base 1. The linkage conversion mechanism includes a linkage block 7 and a diagonal rod 8; the linkage block 7 is horizontally slidably installed in the sliding groove at the top of the mounting plate 2, with an inclined surface 701 at one end and an inclined groove 702 in the middle that is in the same direction as the inclined surface 701; the diagonal rod 8 is fixed to the inner wall of the base 1 by a bracket, and is horizontally inserted in the inclined groove 702, and slides in cooperation with the inclined groove 702; the bottom end of the push rod 9 slides in contact with the inclined surface 701 of the linkage block 7.

[0020] During the first ejection, the piston rod of cylinder 6 extends, causing the mounting plate 2 to rise. The mounting rod 3 simultaneously pushes the push plate 4 upward, initially lifting the product from the cavity of the core 5. Cylinder 6 continues to extend, achieving a second ejection. The mounting plate 2 drives the linkage block 7 to rise synchronously. The inclined rod 8, fixed to the base 1, slides relative to the inclined groove 702, forcing the linkage block 7 to move horizontally along the mounting plate 2. The inclined surface 701 pushes the push rod 9 to slide upward, completely ejecting the product from the core 5. During the reset, the piston rod of cylinder 6 retracts, and the mounting plate 2 drives the push plate 4 and linkage block 7 to descend. The linkage block 7 resets horizontally in the opposite direction under the action of the inclined rod 8, and the push rod 9 falls back to its initial position under the action of gravity.

[0021] The secondary ejection is achieved by driving with a single cylinder 6, which simplifies the structure and reduces manufacturing costs; the push plate 4 and push rod 9 push in stages, so that the force is evenly distributed and the risk of deformation when the product is ejected in one go is avoided; the sliding cooperation between the linkage block 7 and the inclined rod 8 ensures reliable transmission and is suitable for the installation space of small and medium-sized rubber molds.

[0022] like Figures 1-3 As shown, in this embodiment, the secondary ejection assembly further includes a top block 11 and a spring 10; The top of the push rod 9 is connected to the top block 11, and the top of the core 5 is provided with a storage groove 502 to accommodate the top block 11. The spring 10 is sleeved on the push rod 9, and the two ends of the spring 10 elastically abut against the bottom surface of the core 5 and the shoulder 902 provided on the push rod 9, respectively.

[0023] Specifically, the secondary ejection assembly also includes a top block 11 and a spring 10; the top of the push rod 9 is connected to the top block 11 by a thread (the top surface of the top block 11 is arc-shaped and adapts to the inner surface of the product), and the top of the core 5 is provided with a storage groove 502 to accommodate the top block 11 (in its natural state, the top surface of the top block 11 is flush with the cavity surface of the core 5); the spring 10 is sleeved in the middle of the push rod 9, and its two ends elastically abut against the bottom surface of the core 5 and the annular shoulder 902 of the push rod 9, respectively.

[0024] During the second ejection, the push rod 9 drives the top block 11 to extend out of the storage groove 502, and the spring 10 is compressed and provides a buffering force; during the reset, the elastic force of the spring 10 drives the push rod 9 to quickly reset, and the top block 11 retracts into the storage groove 502, without the need for an additional reset mechanism.

[0025] The top block 11 increases the contact area, preventing the push rod 9 from causing localized damage to the product and making it suitable for soft rubber products. The spring 10 enables the push rod 9 to automatically reset, simplifying the structure while improving reset stability. The top block 11's storage design does not affect the product molding accuracy and eliminates the risk of interference during mold closing.

[0026] like Figures 1-3 As shown, in this embodiment, a roller 901 is installed at the bottom end of the push rod 9, and the roller 901 rolls in cooperation with the inclined surface 701 of the linkage block 7.

[0027] Specifically, a roller 901 (made of wear-resistant nylon) is mounted on the bottom of the push rod 9 via a rotating shaft, and the outer circumferential surface of the roller 901 rolls in contact with the inclined surface 701 of the linkage block 7.

[0028] Replacing sliding friction with rolling friction reduces frictional resistance, improves transmission efficiency, and avoids wear on the inclined plane 701; the roller 901 transmission reduces jamming, makes the secondary ejection action smoother, and improves product ejection accuracy; the wear-resistant nylon material extends the life of components and extends the maintenance cycle.

[0029] like Figures 3-4 As shown, in this embodiment, the top of the mounting plate 2 is provided with a guide rail 201 along the horizontal sliding direction, and the bottom of the linkage block 7 is provided with a sliding groove 703 that is adapted to slide with the guide rail 201. The cross-sectional area of ​​the guide rail 201 increases in the vertical upward direction.

[0030] Specifically, the top of the mounting plate 2 is provided with a trapezoidal guide rail 201 (the cross-sectional area increases vertically upward) along the sliding direction of the linkage block 7, and the bottom of the linkage block 7 is provided with a trapezoidal groove 703 that is adapted to the guide rail 201, with the guide rail 201 and the groove 703 in clearance fit.

[0031] The trapezoidal guide rail 201 restricts the vertical displacement of the linkage block 7, preventing it from falling off or tilting during movement, thus improving structural stability. The precise guidance of the guide rail 201 makes the horizontal sliding accuracy of the linkage block 7 higher, ensuring the accuracy of the secondary ejection position. The cooperation between the guide rail 201 and the slide groove 703 reduces the shaking of the linkage block 7, further improving the ejection stability.

[0032] like Figures 1-3 As shown, in this embodiment, a clearance groove 202 is provided on the mounting plate 2 at the position directly below the inclined rod 8.

[0033] Specifically, a rectangular clearance groove 202 is provided on the mounting plate 2 at the position directly below the diagonal bar 8, and the size of the clearance groove 202 meets the clearance requirements of the diagonal bar 8.

[0034] The clearance groove 202 provides clearance space for the diagonal rod 8, avoiding interference between the mounting plate 2 and the diagonal rod 8 when the mounting plate 2 rises to the limit position, thereby increasing the effective stroke of the cylinder 6; reducing friction and collision between the mounting plate 2 and the diagonal rod 8, and reducing operating noise; and adapting to the ejection requirements of products with more height specifications, further enhancing versatility.

[0035] Of course, those skilled in the art will recognize that this invention is not limited to the details of the exemplary embodiments described above, but also includes the same or similar structures that can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0036] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0037] The technologies, shapes, and structures not described in detail in this utility model are all known technologies.

Claims

1. A secondary ejection mechanism for a rubber mold, characterized in that, include: Base (1); The core (5) is fixedly installed on the top of the base (1); A primary ejection assembly includes a power unit and a first ejector driven by the power unit; The secondary ejection assembly includes a second ejector that is slidably disposed within the core (5); A linkage conversion mechanism is installed in the base (1) and is respectively connected to the output end of the power device and the second ejector. When the power device is started, it first drives the first ejector to perform the first ejection action; when the power device continues to run, it drives the second ejector to perform the second ejection action through the linkage conversion mechanism.

2. The secondary ejection mechanism for rubber molds according to claim 1, characterized in that, The power unit is a cylinder (6), and the primary ejection assembly also includes a mounting plate (2) and a mounting rod (3). The cylinder (6) is fixedly installed at the bottom of the base (1), and its piston rod passes through the first opening (101) on the base (1) and is connected to the mounting plate (2); the lower end of the mounting rod (3) is fixedly connected to the mounting plate (2), and the upper end is fixedly connected to the push plate (4) which serves as the first ejector.

3. The secondary ejection mechanism for rubber molds according to claim 2, characterized in that, The linkage conversion mechanism includes a linkage block (7) and a diagonal rod (8); the linkage block (7) is horizontally slidably installed on the mounting plate (2), one end of the linkage block (7) is provided with a slope (701), and the middle is provided with a diagonal groove (702); the diagonal rod (8) is fixedly connected to the base (1) and slides through the diagonal groove (702); The second ejector is a push rod (9), which slides through the through hole (501) on the core (5). The bottom end of the push rod (9) passes through the second opening (102) opened on the top of the base (1) and slides in cooperation with the inclined surface (701) of the linkage block (7).

4. The secondary ejection mechanism for rubber molds according to claim 3, characterized in that, The secondary ejection assembly also includes a top block (11) and a spring (10). The top of the push rod (9) is connected to the top block (11), and the top of the core (5) is provided with a storage groove (502) to accommodate the top block (11). The spring (10) is sleeved on the push rod (9), and the two ends of the spring (10) elastically abut against the bottom surface of the core (5) and the shoulder (902) provided on the push rod (9), respectively.

5. The secondary ejection mechanism for rubber molds according to claim 4, characterized in that, The bottom end of the push rod (9) is equipped with a roller (901), which rolls in cooperation with the inclined surface (701) of the linkage block (7).

6. The secondary ejection mechanism for rubber molds according to claim 4 or 5, characterized in that, The top of the mounting plate (2) is provided with a guide rail (201) along the horizontal sliding direction, and the bottom of the linkage block (7) is provided with a sliding groove (703) that is adapted to slide with the guide rail (201). The cross-sectional area of ​​the guide rail (201) increases in the vertical upward direction.

7. The secondary ejection mechanism for rubber molds according to claim 3, characterized in that, An anti-cavity groove (202) is provided on the mounting plate (2) at the position directly below the diagonal rod (8).

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