A rubber sheath-assisted demolding mechanism

Abstract

This utility model provides an auxiliary demolding mechanism for rubber sleeves, belonging to the field of rubber pump processing technology. It includes a support frame, a threaded column, multiple ejector rods, and a turntable. The support frame is installed at the bottom of the lower mold, providing working space between the support frame and the bottom of the lower mold. The threaded column is fixed between the support frame and the lower mold and is coaxial with the central core. Multiple ejector rods correspond to multiple movable blocks. The bottom of the lower mold has longitudinal through holes corresponding to the movable blocks. The upper ends of the ejector rods are slidably disposed in the longitudinal through holes. The turntable passes through the threaded column and is threadedly connected to it. The upper end of the turntable has an annular groove, and the lower ends of the ejector rods are slidably disposed in the annular groove. The turntable moves upward to drive the ejector rods upward, ejecting the movable blocks from the cavity. This utility model provides an auxiliary demolding mechanism for rubber sleeves that can complete demolding without relying on the deformation of the outlet flange, eliminating the risk of breakage at the connection between the outlet flange and the neck, and reducing the scrap rate.

Description

Technical Field

[0001] This utility model belongs to the field of rubber pump processing technology, and more specifically, it relates to a rubber sheath auxiliary demolding mechanism. Background Technology

[0002] like Figure 1 As shown, the processing mold for the rubber sheath includes an upper mold 100, a lower mold 200, an upper core 300, a middle core 400, and an outlet flange core. A cavity 600 is formed between the upper mold 100 and the lower mold 200. The upper core 300, the middle core 400, and the outlet flange core are all located inside the cavity 600. The upper core 300 is fixed to the upper mold 100, and the bottom of the middle core 400 is fixed to the lower mold 200. The upper end of the mold is inserted into the upper core 300. The outlet flange core includes multiple movable blocks 500. The multiple movable blocks 500 surround the circumference of the middle core 400. The lower end of the movable block 500 is inserted into the lower mold 200. The inner side of the movable block 500 and the middle core 400 form a space for molding the neck of the rubber sheath outlet. The bottom surface of the movable block and the bottom of the lower mold cavity form a space for molding the rubber sheath outlet flange.

[0003] In the processing of rubber sleeves, after the rubber is formed in the processing mold, it needs to be demolded. During demolding, the upper mold and upper core are usually removed, and the rubber sleeve is directly taken out of the cavity. When the rubber sleeve is removed, the outlet flange of the rubber sleeve interferes with the movable block that makes up the outlet flange core. To remove the outlet flange, it is usually necessary to deform the outlet flange and let it come out from the gap between the movable block and the middle core. Although the outlet flange of the rubber sleeve has a certain deformation capacity, the deformation demolding will cause stress concentration at the connection between the outlet flange and the neck. In severe cases, it will cause the outlet flange connection to break, resulting in product scrap. Utility Model Content

[0004] The purpose of this utility model is to provide a rubber sheath auxiliary demolding mechanism, which aims to solve the problem of assisting in the demolding of rubber sheaths and reduce the demolding scrap rate of rubber sheaths.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: to provide a rubber sheath auxiliary demolding mechanism, comprising:

[0006] A support frame is installed at the bottom of the lower mold, and there is a working space between the support frame and the bottom of the lower mold;

[0007] A threaded column is located within the working space and fixed between the support frame and the bottom of the lower mold, and the threaded column is coaxial with the central core;

[0008] Multiple ejector pins are provided, and each ejector pin corresponds to a multiple movable block. The bottom of the lower mold is provided with a longitudinal through hole corresponding to the movable block, and the upper end of the ejector pin is slidably disposed in the longitudinal through hole.

[0009] A turntable is mounted on the threaded column and threadedly connected to it. The upper end of the turntable is provided with an annular groove, and the lower end of the push rod is slidably disposed in the annular groove.

[0010] Rotate the turntable to move it upward, thereby driving the push rod to move upward and push the movable block out of the cavity.

[0011] In one possible implementation, the support frame includes a base plate, and a plurality of support columns are provided between the base plate and the bottom of the lower mold, with the plurality of support columns surrounding the circumference of the base plate.

[0012] In one possible implementation, the lower end of the top rod is provided with a connecting post, which is slidably disposed in the annular groove, and adjacent connecting posts are fixedly connected by a connecting rod.

[0013] In one possible implementation, the top of the connecting column is provided with a longitudinal threaded hole, and the lower end of the push rod passes through the longitudinal threaded hole. Rotating the push rod is used to adjust the distance between the top of the push rod and the turntable.

[0014] In one possible implementation, the top rod is provided with an operating handle located at one end near the connecting post.

[0015] In one possible implementation, a ball bearing is provided between the bottom of the connecting post and the annular groove.

[0016] In one possible implementation, the bottom of the connecting post is provided with a mounting groove, the depth of which is approximately equal to the radius of the ball bearing. A stop block is provided at the bottom of the connecting post, the thickness of which is less than the radius of the ball bearing. A limiting hole is provided in the middle of the stop block corresponding to the mounting groove. The sidewall of the limiting hole is adapted to the sidewall of the ball bearing. The diameter of one end of the limiting hole near the mounting groove is approximately equal to the diameter of the ball bearing, while the diameter of the other end is less than the diameter of the ball bearing. The ball bearing is disposed within the mounting groove, and its lower end is located outside the limiting hole to abut against the annular groove.

[0017] In one possible implementation, the upper end of the top rod is provided with an anti-detachment block, and the longitudinal through hole includes a first section hole and a second section hole connected vertically. The diameter of the first section hole is larger than the diameter of the second section hole, and the anti-detachment block is adapted to the diameter of the first section hole.

[0018] In one possible implementation, a driven disc is mounted on the threaded column. The driven disc is located below the turntable and is threadedly connected to the threaded column. The diameter of the driven disc is smaller than the diameter of the turntable. The driven disc has multiple connecting ribs circumferentially arranged. One end of each connecting rib is connected to the bottom edge of the turntable, and the other end of each connecting rib is connected to the edge of the driven disc.

[0019] In one possible implementation, a drive handle is provided on the outer periphery of the turntable.

[0020] The beneficial effects of the rubber sleeve-assisted demolding mechanism provided by this utility model are as follows: Compared with the prior art, the rubber sleeve-assisted demolding mechanism of this utility model, through the one-to-one correspondence between the ejector rod and the movable block, and the guidance of the longitudinal through hole of the lower mold, can realize the ejection and demolding of the movable block. By setting the threaded column and the central core to be coaxial, and making the turntable drive the ejector rod synchronously through the annular slide, it is ensured that each movable block is subjected to uniform force and vertically detaches from the cavity. The rubber sleeve-assisted demolding mechanism provided by this utility model can complete demolding without relying on the deformation of the outlet flange, eliminating the risk of breakage at the connection between the outlet flange and the neck from the root, and significantly reducing the scrap rate. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A cross-sectional view of a processing mold for rubber sheaths in the prior art;

[0023] Figure 2 A cross-sectional view of a rubber sheath-assisted demolding mechanism provided in an embodiment of this utility model;

[0024] Figure 3 For along Figure 2 Cross-sectional view of line AA in the middle;

[0025] Figure 4 for Figure 2 Enlarged structural diagram at point M;

[0026] Figure 5 for Figure 2 A magnified structural diagram at point N in the diagram.

[0027] Explanation of reference numerals in the attached figures:

[0028] 100. Upper mold; 200. Lower mold; 300. Upper core; 400. Middle core; 500. Movable block; 600. Cavity; 700. Outlet flange; 1. Support frame; 11. Base plate; 12. Support column; 2. Threaded column; 3. Top rod; 31. Operating handle; 32. Connecting rod; 33. Anti-detachment block; 4. Turntable; 41. Annular groove; 42. Drive handle; 5. Connecting column; 51. Longitudinal threaded hole; 52. Mounting groove; 6. Driven plate; 61. Connecting rib; 7. Ball bearing; 8. Stop block; 81. Limiting hole; 9. Longitudinal through hole; 91. First section hole; 92. Second section hole. Detailed Implementation

[0029] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0030] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0031] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0032] 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.

[0033] Please see Figures 1 to 3This invention provides a rubber sleeve auxiliary demolding mechanism. The rubber sleeve auxiliary demolding mechanism includes a support frame 1, threaded columns 2, multiple ejector rods 3, and a turntable 4. The support frame 1 is installed at the bottom of the lower mold 200, and a working space exists between the support frame 1 and the bottom of the lower mold 200. The threaded columns 2 are located within the working space and are fixed between the support frame 1 and the bottom of the lower mold 200 by welding or bolting. The threaded columns 2 are coaxially arranged with the central core 400 in the processing mold. The multiple ejector rods 3 correspond one-to-one with multiple movable blocks 500. Each movable block 500 at the bottom is provided with a longitudinal through hole 9. The longitudinal through hole 9 passes through the bottom of the lower mold 200 and connects to the cavity 600. In application, after the movable block 500 is installed in the cavity 600, the movable block 500 covers the top of the longitudinal through hole 9. The upper end of the push rod 3 is slidably set in the longitudinal through hole 9. The turntable 4 passes through the threaded column 2 and is threadedly connected to the threaded column 2. The upper end face of the turntable 4 is provided with an annular groove 41. The lower end of the push rod 3 is slidably set in the annular groove 41.

[0034] In application, when demolding of the rubber sleeve is required, the upper mold 100 and upper core 300 are first removed to expose the rubber sleeve inside the cavity 600. The operator then rotates the turntable 4 in the working space. Utilizing the threaded engagement between the turntable 4 and the threaded column 2, the turntable 4 moves upward along the threaded column 2. During the upward movement of the turntable 4, the annular slide groove 41 pushes the ejector rod 3 to slide upward along the longitudinal through hole 9 in the lower mold 200. The upper end of the ejector rod 3 directly acts on the bottom of the corresponding movable block 500. As the ejector rod 3 continues to rise, it gradually pushes the movable block 500 out of the cavity 600 until the movable block 500 drives the rubber sleeve upward away from the middle core 400. The operator can then pull out the movable block 500 from the side, completely separating the movable block 500 from the outlet flange 700 and the neck area of ​​the rubber sleeve. Thus, demolding can be completed without relying on the deformation of the outlet flange 700.

[0035] This utility model provides a rubber sleeve-assisted demolding mechanism. Compared with the prior art, by having a one-to-one correspondence between the ejector rod 3 and the movable block 500, and with the guidance of the longitudinal through hole 9 of the lower mold 200, the movable block 500 can be ejected and demolded. By setting the threaded column 2 and the central core 400 to be coaxial, and by having the turntable 4 synchronously drive the ejector rod 3 through the annular slide groove 41, it is ensured that each movable block 500 is subjected to uniform force and vertically detaches from the cavity 600. The rubber sleeve-assisted demolding mechanism provided by this utility model can complete demolding without relying on the deformation of the outlet flange 700, eliminating the risk of breakage at the connection between the outlet flange 700 and the neck from the root, and significantly reducing the scrap rate.

[0036] In some embodiments, please refer to Figures 2 to 3The aforementioned support frame 1 consists of a base plate 11 and multiple support columns 12. The base plate 11 serves as the load-bearing foundation. The aforementioned threaded columns 2 are positioned between the base plate 11 and the bottom of the lower mold 200. The support columns 12 are vertically connected between the base plate 11 and the bottom of the lower mold 200 and are evenly distributed around the base plate 11. In application, the support columns 12 have a certain height and are fixed to the base plate 11 and the bottom of the lower mold 200 by welding or bolting. Through the support columns 12, the support frame 1 forms a frame-type support structure, thereby enclosing a stable working space between the base plate 11 and the bottom of the lower mold 200, providing installation and operation space for components such as the threaded columns 2 and the turntable 4.

[0037] In some embodiments, please refer to Figures 2 to 4 A connecting post 5 is added to the lower end of each ejector rod 3. The connecting post 5 is a cylinder, and its diameter is adapted to the width of the annular groove 41. In application, the connecting post 5 is slidably embedded in the annular groove 41 of the turntable 4 and is fixedly connected between adjacent connecting posts 5 by connecting rods 32, so that multiple connecting posts 5 form a closed-loop integral structure, avoiding the tilting of a single connecting post 5 during sliding, ensuring that the ejector rod 3 rises and falls synchronously, and improving demolding stability.

[0038] In this embodiment, a longitudinal threaded hole 51 is opened at the top of the connecting column 5, and the lower end of the push rod 3 is threadedly engaged with the longitudinal threaded hole 51. By rotating the push rod 3, the distance between its top and the turntable 4 can be adjusted to achieve the push height calibration. In application, with the help of the threaded engagement between the push rod 3 and the connecting column 5, the height of the push rod 3 can be calibrated separately, which can improve the overall synchronization and compensate for the machining error of the movable block 500.

[0039] In this embodiment, in order to facilitate the rotation of the top rod 3, an operating handle 31 is provided on the top rod 3. In this embodiment, the operating handle 31 is a short rod that is horizontally welded and fixed on the top rod 3. In order to avoid the operating handle 31 from hindering the upward movement of the top rod 3, the operating handle 31 is set at one end close to the connecting column 5, so that the distance between the operating handle 31 and the top of the top rod 3 is much greater than the distance that the top rod 3 needs to rise to push out the movable block 500.

[0040] In some embodiments, please refer to Figure 2 and Figure 4A ball bearing 7 is added at the sliding fit between the connecting column 5 and the annular groove 41. The specific installation structure of the ball bearing 7 is as follows: A mounting groove 52 is provided at the bottom of the connecting column 5. The mounting groove 52 is a square groove, and the depth of the mounting groove 52 is approximately equal to the radius of the ball bearing 7. The mounting groove 52 is used to accommodate the ball bearing 7. A stop block 8 is provided at the bottom of the connecting column 5. The stop block 8 is fixed to the connecting column 5 by bolting. The thickness of the stop block 8 is less than the radius of the ball bearing 7. A limiting hole 81 is provided in the middle of the stop block 8 corresponding to the mounting groove 52. The side wall of the limiting hole 81 is adapted to the side wall of the ball bearing 7. The diameter of the end of the limiting hole 81 near the mounting groove 52 is approximately equal to the diameter of the ball bearing 7, and the diameter of the other end of the limiting hole 81 is less than the diameter of the ball bearing 7. The ball bearing 7 is placed in the mounting groove 52, and its lower end extends out of the stop block 8 through the limiting hole 81 and abuts against the inner wall of the annular groove 41 of the turntable 4 to form a rolling fit.

[0041] In this embodiment, the sliding friction between the connecting column 5 and the annular groove 41 is converted into rolling friction by the ball bearing 7, which greatly reduces the frictional resistance and wear between the two, making the turntable 4 rotate more effortlessly and extending the service life of the components. The mounting groove 52 cooperates with the limiting hole 81, which not only restricts the axial displacement of the ball bearing 7 by the stop block 8 (to prevent it from falling off), but also retains the radial rolling space of the ball bearing 7, ensuring that the connecting column 5 slides stably along the annular groove 41 and preventing the top rod 3 from tilting. The gradually changing diameter design of the limiting hole 81 precisely constrains the position of the ball bearing 7. Combined with the matching of the depth of the mounting groove 52 and the thickness of the stop block 8, it ensures that the ball bearing 7 and the groove are always in effective contact, improving the smoothness of the lifting and lowering of the top rod 3.

[0042] In some embodiments, please refer to Figure 2 and Figure 5 An anti-detachment block 33 is bolted to the upper end of the push rod 3. The anti-detachment block 33 is a block-shaped structure with a diameter larger than that of the main body of the push rod 3. The longitudinal through hole 9 is divided into a first section hole 91 and a second section hole 92 connected vertically. The first section hole 91 is located at the top (closer to the cavity 600) and has a larger diameter; the second section hole 92 is located at the bottom (closer to the working space) and has a smaller diameter. The connection between the two sections forms an annular stepped surface. The diameter of the anti-detachment block 33 is adapted to the first section hole 91 and can slide freely within the first section hole 91, but because its diameter is larger than that of the second section hole 92, it cannot pass through the second section hole 92. When the push rod 3 moves up and down within the longitudinal through hole 9, the anti-detachment block 33 is always constrained within the first section hole 91, and only the main body of the push rod 3 passes through the second section hole 92.

[0043] In this embodiment, the anti-detachment block 33 and the stepped surface of the longitudinal through hole 9 form a rigid constraint. When the ejector rod 3 descends to the limit position, the anti-detachment block 33 is blocked by the stepped surface, which completely prevents the ejector rod 3 from detaching from the longitudinal through hole 9 due to vibration, misoperation or long-term use. In addition, the clearance fit between the anti-detachment block 33 and the first section hole 91 can help the ejector rod 3 maintain a vertical state, reduce the tilting and shaking of the ejector rod 3 when it rises and falls, indirectly ensure that the moving block 500 is subjected to uniform force, and reduce the probability of product damage during demolding.

[0044] In some embodiments, please refer to Figures 2 to 3 A driven disc 6 is also mounted on the threaded column 2. The driven disc 6 is located below the turntable 4 and is threadedly connected to the threaded column 2. The diameter of the driven disc 6 is smaller than that of the turntable 4. Multiple connecting ribs 61 are evenly distributed around the driven disc 6. One end of the connecting rib 61 is fixed to the bottom edge of the turntable 4, and the other end is connected to the edge of the driven disc 6, forming a rigid frame structure. When the turntable 4 is rotated, the driven disc 6 is driven to rotate synchronously through the connecting ribs 61. The turntable 4 and the driven disc 6 rise and fall synchronously along the threaded column 2. In this embodiment, the turntable 4 and the driven disc 6 work together through the connecting ribs 61 to disperse the pushing force during demolding to a larger area, reduce local stress concentration in the threaded column 2, and extend the service life of the threaded pair. In addition, the triangular support structure formed by the connecting ribs 61 effectively suppresses the tilt of the turntable 4, ensures the vertical rise and fall of the ejector rod 3, and avoids jamming of the movable block 500 due to uneven force.

[0045] In this embodiment, multiple drive handles 42 are fixedly installed on the outer circumferential surface of the turntable 4. In this embodiment, the drive handle 42 is a rod arranged radially along the turntable 4. The drive handle 42 is fixed to the turntable 4 by welding or bolting. When the operator holds the drive handle 42 and applies a rotational force, the drive handle 42 drives the turntable 4 to rotate synchronously. Then, through the threaded engagement between the turntable 4 and the threaded column 2, the turntable 4 can move up and down along the threaded column 2.

[0046] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A rubber jacket assisted demolding mechanism characterized by, include: A support frame (1) is installed at the bottom of the lower mold (200), and there is a working space between the support frame (1) and the bottom of the lower mold (200); The threaded column (2) is located within the working space and is fixed between the support frame (1) and the bottom of the lower mold (200), and the threaded column (2) is coaxial with the central core (400); Multiple push rods (3) are provided, and the multiple push rods (3) correspond one-to-one with multiple movable blocks (500). The bottom of the lower mold (200) is provided with a longitudinal through hole (9) corresponding to the movable block (500). The upper end of the push rod (3) is slidably disposed in the longitudinal through hole (9). Turntable (4), the turntable (4) is mounted on the threaded column (2) and threadedly connected to the threaded column (2). The upper end of the turntable (4) is provided with an annular groove (41), and the lower end of the top rod (3) is slidably disposed in the annular groove (41). Rotate the turntable (4) to move it upward, thereby driving the push rod (3) to move upward and push the movable block (500) out of the cavity (600).

2. A rubber jacket assisted demolding mechanism as claimed in claim 1, wherein, The support frame (1) includes a base plate (11), and a plurality of support columns (12) are provided between the base plate (11) and the bottom of the lower mold (200), and the plurality of support columns (12) surround the circumference of the base plate (11).

3. A rubber jacket assisted stripping mechanism as claimed in claim 1, wherein, The lower end of the top rod (3) is provided with a connecting column (5), which is slidably disposed in the annular groove (41), and adjacent connecting columns (5) are fixedly connected by connecting rods (32).

4. A rubber jacket assisted stripping mechanism as claimed in claim 3, wherein, The top of the connecting column (5) is provided with a longitudinal threaded hole (51), and the lower end of the push rod (3) passes through the longitudinal threaded hole (51). Rotating the push rod (3) is used to adjust the distance between the top of the push rod (3) and the turntable (4).

5. The rubber sheath-assisted demolding mechanism as described in claim 4, characterized in that, The top rod (3) is provided with an operating handle (31), which is located at one end near the connecting column (5).

6. A rubber jacket assisted stripping mechanism as claimed in claim 3, wherein, A ball bearing (7) is provided between the bottom of the connecting column (5) and the annular groove (41).

7. A rubber jacket assisted stripping mechanism as claimed in claim 6, wherein, The bottom of the connecting column (5) is provided with an installation groove (52), the depth of which is equivalent to the radius of the ball (7). The bottom of the connecting column (5) is provided with a stop block (8), the thickness of which is less than the radius of the ball (7). The middle part of the stop block (8) is provided with a limiting hole (81) corresponding to the installation groove (52). The side wall of the limiting hole (81) is adapted to the side wall of the ball (7). The diameter of one end of the limiting hole (81) near the installation groove (52) is equivalent to the diameter of the ball (7), and the diameter of the other end of the limiting hole (81) is less than the diameter of the ball (7). The ball (7) is located in the installation groove (52), and the lower end of the ball (7) is located outside the limiting hole (81) for abutting against the annular groove (41).

8. A rubber jacket assisted stripping mechanism as claimed in claim 1, wherein, The top rod (3) is provided with an anti-detachment block (33) at its upper end. The longitudinal through hole (9) includes a first section hole (91) and a second section hole (92) connected vertically. The diameter of the first section hole (91) is larger than the diameter of the second section hole (92). The anti-detachment block (33) is adapted to the diameter of the first section hole (91).

9. A rubber jacket assisted stripping mechanism as claimed in claim 1, wherein, A driven disc (6) is mounted on the threaded column (2). The driven disc (6) is located below the turntable (4) and is threadedly connected to the threaded column (2). The diameter of the driven disc (6) is smaller than the diameter of the turntable (4). The driven disc (6) has multiple connecting ribs (61) circumferentially arranged. One end of the connecting rib (61) is connected to the bottom edge of the turntable (4), and the other end of the connecting rib (61) is connected to the edge of the driven disc (6).

10. A rubber jacket assisted stripping mechanism as claimed in claim 1, wherein, A drive handle (42) is provided on the outer periphery of the turntable (4).

Images