Silicone rubber mold pressing preparation machine for cable

Abstract

The utility model relates to the technical field of silicone rubber mould pressing preparation, in particular to a silicone rubber mould pressing preparation machine for cables, which comprises a base, a supporting rod is fixedly connected to the top of the base, an operation table is fixedly connected to the top end of the supporting rod, and a concave mould is fixedly mounted at the top of the operation table. A top seat is fixedly connected to the top of the base and located on the outer side of the supporting rod, a male die is connected to the bottom of the top seat through a hydraulic device, and a taking-out frame arranged in an inner cavity of a female die is overturned around the inner wall of the die under driving of a hydraulic oil cylinder by means of a mechanical transmission structure composed of a connecting plate, a long rod and a butt joint block; the device stably supports a compression molded silicone rubber workpiece from the bottom, avoids direct contact and external force damage to the surface of the workpiece caused by traditional ejection, clamping or manual stripping, ensures the shape precision and surface quality of the workpiece, and is particularly suitable for thin-wall and easily-deformed silicone rubber products for cables.

Description

Technical Field

[0001] This utility model relates to the field of silicone rubber molding technology, and more specifically, to a silicone rubber molding machine for cables. Background Technology

[0002] In the field of silicone rubber molding technology, especially in the production of silicone rubber products for cables, the efficient and non-destructive removal of the workpiece after molding is a key issue restricting automated production. Traditional molding machines have some problems when removing workpieces:

[0003] Relying on operators to manually pry or pull workpieces out of the mold cavity is inefficient and unsuitable for large-scale production. Silicone rubber material is highly elastic and has strong adhesion, making it prone to deformation and tearing due to uneven force. Alternatively, the ejector pins at the bottom of the mold can push the workpiece upwards, but the small contact area of ​​the ejector pins can easily leave dents on the workpiece surface. For silicone rubber products for cables with complex shapes or thin walls, stress concentration during ejection may cause damage. Another option is to wait for the mold to fully open before a robotic arm can grip the workpiece. This requires high positioning accuracy of the grippers, and improper gripping force control can still damage the workpiece surface.

[0004] Existing technologies lack a removal device that can adapt to the depth of the mold cavity structure and smoothly lift the bottom of the workpiece through mechanical transmission, making it difficult to improve the production quality and efficiency of silicone rubber products for cables. Therefore, there is an urgent need to design a built-in, low-damage removal mechanism to solve the core problems of traditional removal methods. Utility Model Content

[0005] The purpose of this invention is to provide a silicone rubber molding machine for cables. Through a take-out frame built into the inner cavity of the concave mold, and utilizing a mechanical transmission structure consisting of a connecting plate, a long rod, and a connecting block, the machine rotates around the inner wall of the mold under the drive of a hydraulic cylinder, smoothly lifting the molded silicone rubber workpiece from the bottom. This avoids direct contact and external force damage to the workpiece surface caused by traditional ejection, clamping, or manual peeling, ensuring the shape accuracy and surface quality of the workpiece. It is particularly suitable for thin-walled, easily deformable silicone rubber products for cables, thus solving the problem in the existing technology of lacking a take-out device that can adapt to the depth of the mold cavity structure and achieve smooth lifting of the workpiece from the bottom through mechanical transmission, which makes it difficult to improve the production quality and efficiency of silicone rubber products for cables.

[0006] To achieve the above objectives, a silicone rubber molding machine for cables is provided, comprising a base, a support rod fixedly connected to the top of the base, an operating table fixedly connected to the top of the support rod, a concave mold fixedly mounted on the top of the operating table, a top seat fixedly connected to the top of the base and outside the support rod, and a convex mold connected to the bottom of the top seat via a hydraulic device. A take-out frame is provided inside the concave mold cavity, which is rotatably connected to the inner wall of the concave mold via a connecting plate. A long rod at the end of the connecting plate is hinged to a rotating rod via a connecting block. The driving assembly on the top seat includes a fixed block, a rotating rod, and a hydraulic cylinder. The hydraulic cylinder pulls the rotating rod around the fixed block via a pull rope, thereby driving the take-out frame.

[0007] When the mold is closed, the take-out frame fits against the inner wall of the mold; after the mold is opened, the hydraulic cylinder retracts and pulls the rotating rod, which drives the connecting plate to flip through the docking block, so that the take-out frame lifts the workpiece from the bottom of the mold.

[0008] The built-in structure supports the workpiece directly from the bottom of the mold cavity, avoiding surface contact damage and ensuring the shape accuracy and surface quality of silicone rubber workpieces such as cable sheaths.

[0009] The drive assembly is equipped with a first winding shaft and a second winding shaft to optimize the transmission path of the pull rope; after the workpiece is removed, it automatically resets to the fitting state.

[0010] The winding shaft forms a pulley system to amplify the pulling force, allowing the rotating rod to rotate smoothly; the return spring ensures that the removal frame is hidden at the edge of the mold during molding, without affecting the mold closing accuracy.

[0011] The combination of hydraulic drive and mechanical transmission enables labor-saving and precise control of the take-out rack flipping, while the reset function improves production continuity and is suitable for high-frequency operations on automated production lines.

[0012] The rotating rod and the fixed block are connected by bearings or pins, and the axis is parallel to the center line of the mold cavity; the mating block adopts a T-shaped / L-shaped cross section and is hinged or bolted to the long rod and the rotating rod.

[0013] Bearing connections reduce rotational friction and ensure uniform torque; detachable connecting blocks facilitate adjustment of the long rod's position and angle.

[0014] Enhance the stability of the transmission structure, reduce mechanical wear, and adapt to different mold specifications through modular design to improve the equipment's versatility and ease of maintenance.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] 1. In this type of silicone rubber molding preparation machine for cables, a take-out frame built into the inner cavity of the concave mold is used to rotate around the inner wall of the mold under the drive of a hydraulic cylinder, through a mechanical transmission structure consisting of a connecting plate, a long rod and a connecting block. This smoothly lifts the molded silicone rubber workpiece from the bottom, avoiding direct contact and external force damage to the workpiece surface caused by traditional ejection, clamping or manual peeling, ensuring the shape accuracy and surface quality of the workpiece. It is especially suitable for thin-walled and easily deformable silicone rubber products for cables.

[0017] 2. In this silicone rubber molding machine for cables, the hydraulic cylinder realizes the automatic flipping and reset of the take-out frame through the linkage mechanism of the pulling rope, the winding shaft and the rotating rod, without manual intervention; the reset spring ensures that the take-out frame automatically fits against the inner wall of the mold after the workpiece is taken out, preparing for the next cycle, significantly improving production efficiency and adapting to the continuous operation requirements of automated production lines.

[0018] 3. In this silicone rubber molding machine for cables, the connecting block serves as a transmission hub, simplifying mechanical connections. The bearing connection between the rotating rod and the fixed block, and the optimized rope transmission path design reduce component wear and improve equipment stability. The take-out frame can be adapted to molds of different specifications by adjusting the length of the connecting plate and the position of the connecting block, making it highly versatile, with low maintenance costs, and meeting the reliability requirements of high-frequency industrial production. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the concave mold of this utility model;

[0021] Figure 3 This is a plan view of the concave mold structure of this utility model;

[0022] Figure 4 This is a schematic diagram of the removal rack structure of this utility model.

[0023] In the diagram: 1. Base; 2. Support rod; 3. Operating table; 4. Concave mold; 5. Top seat; 6. Convex mold; 7. Take-out rack; 8. Connecting plate; 9. Long rod; 10. Connecting block; 11. Rotating rod; 12. First winding shaft; 13. Fixing block; 14. Hydraulic cylinder; 15. Fixing frame; 16. Second winding shaft; 17. Pull rope. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0025] In the description of this utility model, 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", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component 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 utility model.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0027] This utility model provides a silicone rubber molding machine for cables, which includes the following features:

[0028] For details, please refer to Figures 1-4 As shown, the equipment includes a base 1. The top of the base 1 is fixedly connected to a support rod 2 by means of bolts or welding. A top seat 5 is fixedly connected to the outside of the support rod 2 to serve as the foundation of the equipment, providing overall support and ensuring the stability of the installation position of each component. The top of the support rod 2 is fixedly connected to an operating table 3. A concave mold 4 is fixedly installed on the top of the operating table 3, raising the concave mold 4 to a suitable height to facilitate molding operations. At the same time, it isolates the base 1 from the mold area to avoid interference.

[0029] The bottom of the top seat 5 is connected to the punch 6 via a hydraulic device. The hydraulic device drives the punch 6 to move up and down to achieve mold closing and opening, providing mold pressure to ensure that the silicone rubber is formed between the concave mold 4 and the punch 6.

[0030] Please see Figures 2-4As shown, one end of the connecting plate 8 is fixedly connected to a long rod 9, and the bottom end of the long rod 9 is fixedly connected, such as by welding, or detachably connected, such as by bolts, to a mating block 10. The mating block 10 and the rotating rod 11 are connected by a rotating connection, such as a hinge, to transmit the driving force of the rotating rod 11 and realize the motion transmission of the take-up frame 7.

[0031] The fixed block 13 is fixedly installed on the top of the top seat 5. The rotating rod 11 is connected to the side of the fixed block 13 through a rotating connection such as a bearing or a pin. It can rotate around the fixed point, providing a rotation fulcrum for the rotating rod 11 and ensuring stable transmission of driving force.

[0032] The hydraulic cylinder 14 is fixed to the bottom of the top seat 5 by the fixing bracket 15, with the output end pointing vertically downward. One end of the pulling rope 17 is wound around the first winding shaft 12 on the rotating rod 11, and the other end passes over the second winding shaft 16 on the top seat 5 and is fixedly connected to the output end of the hydraulic cylinder 14. When the hydraulic cylinder 14 retracts, the linear tension is converted into the rotational torque of the rotating rod 11 by the guidance of the pulling rope 17, the first winding shaft 12 and the second winding shaft 16, which drives the take-up frame 7 to flip in a labor-saving and smooth manner.

[0033] Please see Figures 2-4 As shown, it is fixedly installed at the bottom of the top seat 5 to fix the hydraulic cylinder 14, ensuring that the hydraulic cylinder 14 is installed in an accurate position and is subjected to uniform force. It is set at the rotation connection between the rotating rod 11 and the fixed block 13, with its axis parallel to the center line of the cavity of the concave mold 4, to reduce rotational friction, ensure that the rotating rod 11 is subjected to uniform force when rotating, and avoid jamming.

[0034] Working principle: The punch 6 descends under the drive of the hydraulic device and closes with the concave die 4. The silicone rubber material is compressed and formed in the mold cavity. After the punch 6 rises and opens the mold, the hydraulic cylinder 14 starts and the output end retracts downward, pulling the pull rope 17. The pull rope 17 passes around the second winding shaft 16 and drives the rotating rod 11 to rotate around the pin on the fixed block 13. The rotating rod 11 pulls the long rod 9 through the docking block 10, so that the connecting plate 8 drives the take-out frame 7 to lift from the bottom of the mold, supporting the formed silicone rubber workpiece, such as a cable sheath. The workpiece is flipped up to the top of the mold with the take-out frame 7, and can be directly removed by man or robotic arm, avoiding contact with the inner wall of the mold or the surface of the workpiece. After the workpiece is removed, the hydraulic cylinder 14 is released, the pull rope 17 is loosened, and the take-out frame 7 fits against the inner wall of the concave die 4, waiting for the next cycle of mold closing.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A silicone rubber molding machine for cables, comprising a base (1), a support rod (2) fixedly connected to the top of the base (1), an operating table (3) fixedly connected to the top of the support rod (2), a concave mold (4) fixedly installed on the top of the operating table (3), a top seat (5) fixedly connected to the top of the base (1) and outside the support rod (2), and a convex mold (6) connected to the bottom of the top seat (5) via a hydraulic device, characterized in that: The cavity of the concave mold (4) is provided with a take-out rack (7). The top of the take-out rack (7) is fixedly connected to a connecting plate (8) that contacts the top of the concave mold (4). The end of the connecting plate (8) away from the inner wall of the concave mold (4) is fixedly connected to a long rod (9). The bottom end of the long rod (9) is rotatably connected to the rotating rod (11) through a docking block (10). The top seat (5) is provided with a drive assembly for driving the take-out frame (7). The drive assembly includes a fixed block (13) fixedly installed on the top of the top seat (5). A rotating rod (11) is rotatably connected to the side of the fixed block (13). The end of the rotating rod (11) away from the fixed block (13) is connected to a hydraulic cylinder (14) via a pull rope (17). The hydraulic cylinder (14) is fixedly installed on the top seat (5). The rotating rod (11) drives the long rod (9) and the connecting plate (8) to move via the docking block (10).

2. A machine for the moulding of silicone rubber for cables according to claim 1, characterised in that: The drive assembly also includes a first winding shaft (12) and a second winding shaft (16). The first winding shaft (12) is fixedly installed on one end of the rotating rod (11) near the pull rope (17). The second winding shaft (16) is fixedly installed on the top seat (5) and located on one side of the hydraulic cylinder (14). One end of the pull rope (17) is wound around the first winding shaft (12), and the other end passes around the second winding shaft (16) and is fixedly connected to the output end of the hydraulic cylinder (14).

3. A machine for the moulding of silicone rubber for cables according to claim 2, characterised in that: A reset spring is provided at the rotatable connection between the connecting plate (8) and the inner wall of the concave mold (4). The reset spring is used to drive the connecting plate (8) to flip and reset towards the bottom of the inner cavity of the concave mold (4), so that the take-out frame (7) fits against the inner wall of the concave mold (4) during molding.

4. A machine for the moulding of silicone rubber for cables according to claim 3, characterised in that: The bottom of the top seat (5) is provided with a fixed frame (15), and the hydraulic cylinder (14) is fixedly installed on the fixed frame (15). The output end of the hydraulic cylinder (14) is set vertically downward. The rotating rod (11) is pulled around the fixed block (13) by pulling the rope (17).

5. A machine for the moulding of silicone rubber for cables according to claim 4, characterised in that: A bearing or pin is provided at the rotational connection between the rotating rod (11) and the fixed block (13), and the axis of the bearing or pin is parallel to the center line of the mold cavity of the concave mold (4).

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