A slide-on ejector mechanism for injection molding
By coordinating the movement of the drive component and the ejection component, the problem of screw sticking to the slider during injection molding is solved, achieving stable core pulling and ejection of the slider, improving injection molding accuracy and production efficiency, and increasing product yield.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CAD-IT TECH (TAICANG) CORP
- Filing Date
- 2025-05-16
- Publication Date
- 2026-05-29
AI Technical Summary
During the injection molding process, the screw posts of the product are prone to sticking to the slider, which can easily cause them to tear or break during demolding, affecting production efficiency and yield.
The coordinated movement of the drive assembly and the ejection assembly, including the inclined guide post fixing block, ejector plate, ejector plate, stop block, etc., achieves stable core pulling and ejection of the slider through step-by-step movement, avoiding the screw post from being clamped.
It improves the precision and stability of injection molding and core pulling, increases product yield and work efficiency, and has a simple and safe structure.
Smart Images
Figure CN224296478U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of injection mold technology, and in particular to an ejection mechanism for a slider used in injection molding. Background Technology
[0002] During injection molding, the following are some common reasons why molded parts may stick to the slider during demolding: 1) The screw post B on product A has a strong clamping force; 2) There is no effective stop; 3) The ribs at the product's exit point from the slider are densely packed. This sticking is particularly common during the injection molding of screw posts, as the inner side of the screw post is held tightly by the insert pins and the outer side is held tightly by the slider.
[0003] If the sticking of the slider occurs, the existing injection molding machine can easily cause the screw post to crack or even break when demolding and pulling the core, resulting in low product yield and affecting production efficiency. Therefore, improvements are needed. Utility Model Content
[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:
[0005] A slider ejection mechanism for injection molding is provided, comprising a drive assembly disposed on a front mold and an ejection assembly movably disposed on a rear mold;
[0006] The driving assembly includes a slanted guide post fixing block and a slanted guide post. The slanted guide post fixing block is connected to the front mold. The upper end of the slanted guide post is connected to the slanted guide post fixing block, and its lower end extends outward at an angle. A limit drive groove is provided on the side wall of the slanted guide post fixing block.
[0007] The ejector assembly includes an ejector plate, an ejector plate, an ejector base plate, a stop block, an ejector sleeve, a slider, an ejector plate drive linkage, and an ejector pin.
[0008] The slider is provided with an inclined guide groove that is movably connected to the inclined guide post, allowing the slider to move back and forth on the rear mold under the action of the inclined guide post. A movable groove is provided on one side of the slider, and the ejector plate is movably disposed within the movable groove via an elastic element. The ejector plate is connected to the ejector plate. An ejector base plate and a stop block are provided on the slider at the opening of the movable groove. The side wall of the stop block contacts the inclined guide post fixing block, ensuring that the ejector base plate and the stop block move synchronously with the slider under the action of the inclined guide post fixing block. One end of the ejector plate drive linkage is connected to the ejector pin. The ejector plate is connected to the ejector plate, and the other end extends outward through the ejector base plate and the stop block to the limiting drive groove. The end face of the ejector plate drive linkage is in contact with the straight surface in the limiting drive groove. The inclined guide post fixing block drives the ejector plate or the ejector plate to move back and forth through the limiting drive groove and the ejector plate drive linkage. The ejector sleeve is a hollow structure and moves back and forth under the action of the ejector plate and the ejector plate to form or loosen the screw post. The ejector pin is movably connected to the ejector sleeve, and the ejector pin 12 extends or retracts into the ejector sleeve under the action of the ejector base plate and the stop block.
[0009] In a preferred embodiment of the present invention, the front mold is provided with an ejection limiting block for limiting and fixing the inclined guide post fixing block.
[0010] In a preferred embodiment of this utility model, the front mold is provided with a pressure strip that contacts and limits the slider.
[0011] In a preferred embodiment of the present invention, a gap is provided between the inclined guide groove and the inclined guide post.
[0012] In a preferred embodiment of this utility model, a slider backhoe is provided on the rear mold, and the slider backhoe is movably connected to the inclined guide post fixing block.
[0013] In a preferred embodiment of this utility model, a slider limiting block is provided on the rear mold to limit the movement distance of the slider.
[0014] In a preferred embodiment of this utility model, the slider is movably connected to the rear mold through a slide rail guide structure.
[0015] In a preferred embodiment of the present invention, the stop block is located on the outside of the ejector pin base plate, and the sidewalls of the stop block that contact the inclined guide post fixing block are both inclined guide surfaces.
[0016] In a preferred embodiment of this utility model, the outer end of the ejector plate drive linkage is provided with a chamfer to avoid interference with the inclined guide post fixing block.
[0017] In a preferred embodiment of this utility model, one end of the ejector sleeve is connected to the ejector pin panel, and one end of the ejector pin is connected to the ejector pin base plate or the stop block.
[0018] The beneficial effects of this utility model are: it solves the problem of unstable production caused by the product sticking to the core-pulling mechanism; by cooperating with the drive component and the ejection component to perform step-by-step movement, it greatly improves the accuracy and stability of injection molding and core pulling, increases the product yield and work efficiency, and has a stable and simple structure, which is conducive to safe production. Attached Figure Description
[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments 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, wherein:
[0020] Figure 1 This is a schematic diagram of a preferred embodiment of the ejection mechanism in a slider for injection molding according to the present invention;
[0021] Figure 2 This is a schematic diagram of an angled cross-sectional structure of a slider ejection mechanism for injection molding according to this utility model.
[0022] Figure 3 This is a cross-sectional view of another angle of the ejection mechanism in a slider for injection molding according to this utility model.
[0023] Figure 4 This is a partially enlarged structural diagram of an ejector mechanism for a slider used in injection molding, according to this utility model. Detailed Implementation
[0024] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0025] Please see Figure 1-4 The embodiments of this utility model include:
[0026] An ejector mechanism for injection molding includes a drive assembly disposed on a front (upper) mold and an ejector assembly movably disposed on a rear (lower) mold. The drive assembly and the ejector assembly are movably connected to drive the ejector assembly to perform core pulling.
[0027] The drive assembly includes a slanted guide post fixing block 5 and a slanted guide post 6. The slanted guide post fixing block 5 is connected to the front mold. The upper end of the slanted guide post 6 is connected to the slanted guide post fixing block 5, and the lower end extends outward at an angle. A limit drive groove 51 is provided on the side wall of the slanted guide post fixing block 5.
[0028] More preferably, the front mold is provided with an ejection limiting block 11 for limiting and fixing the inclined guide post fixing block 5.
[0029] More preferably, the front mold is provided with a pressure strip 13 that contacts the slider 8 in the ejection assembly, so as to limit the slider 8 in the vertical direction.
[0030] The ejector assembly includes an ejector plate 1, an ejector plate 2, an ejector base plate 3, a stop block 4, a sleeve 7, a slider 8, an ejector plate drive linkage 10, and an ejector pin 12.
[0031] The slider 8 is provided with an inclined guide groove 80, which is movably connected to the inclined guide post 6, so that the slider 8 can move back and forth on the rear mold under the action of the inclined guide post 6 to move away from or closer to product A.
[0032] In a further preferred embodiment, a gap of approximately 0.5 mm is provided between the inclined guide groove 80 and the inclined guide post 6.
[0033] In a further preferred embodiment, the rear mold is provided with a slider backing 9, which is movably connected to the inclined guide post fixing block 5 to ensure accurate connection between the inclined guide post fixing block 5 and the slider.
[0034] In a further preferred embodiment, a slider limiting block 14 is provided on the rear mold to limit the movement distance of the slider 8.
[0035] In a further preferred embodiment, the slider 8 is movably connected to the rear mold via a guide structure such as a slide rail, and a return spring is connected between the slider 8 and the rear mold to drive the slider 8 to return away from the product when the mold is opened.
[0036] One side of the slider 8 is in contact with product A, and the other side of the slider 8 away from the product is provided with a movable groove 81. The ejector plate 1 is movably disposed in the movable groove 81 through the elastic element 82. The ejector plate 2 is connected to the ejector plate 1. The slider 8 at the opening of the movable groove 81 is provided with an ejector base plate 3 and a stop block 4, and the stop block is located outside the ejector base plate 3. The side wall of the stop block 4 is in contact with the side wall of the inclined guide post fixing block 5, so that the ejector base plate 3 and the stop block 4 are driven to move synchronously with the slider 8 through the inclined guide post fixing block 5 and the inclined guide post 6.
[0037] In a further preferred embodiment, the sidewalls of the stop block 4 and the inclined guide post fixing block 5 that are in contact with each other are inclined guide surfaces, which can more effectively push the stop block 4 to move and prevent the inclined guide post fixing block 5 from interfering with or getting stuck with the stop block 4 when it moves in a straight line back and forth (up and down).
[0038] One end of the ejector plate drive linkage 10 is connected to the ejector plate 1 or ejector plate 2, and the other end extends outward through the ejector base plate 3 and the stop block 4 to the limiting drive groove 51. The end face of the ejector plate drive linkage 10 contacts the straight surface in the limiting drive groove 51. The inclined guide post fixing block 5 drives the ejector plate drive linkage 10 to move back and forth through the limiting drive groove 51, thereby making the ejector plate 1 or ejector plate 2 move closer to or further away from the product.
[0039] More preferably, the top of the outer end of the ejector plate drive linkage 10 is chamfered to avoid interference with the inclined guide post fixing block 5.
[0040] The ejector sleeve 7 is a hollow cylindrical structure, with one end connected to the ejector plate 1. As the ejector plate 1 and ejector plate 2 move back and forth within the slider 8, it abuts against or releases the screw post B of product A. The ejector pin 12 is movably connected to the ejector sleeve 7, and one end of the ejector pin 12 is connected to the ejector base plate 3 or the stop block 4. Under the action of the ejector base plate 3 and the stop block 4, it retracts into the ejector sleeve, thereby disengaging from the screw post B on product A and completing the core pulling.
[0041] The working principle of the ejector mechanism in the slider of this application includes:
[0042] See Figure 2-3 When the mold opens: the inclined guide post fixing block 5 and the inclined guide post 6 move vertically upward together under the drive of the front mold, causing the slider 8 to start moving to the right under the action of the inclined guide post 6 to leave product A. At the same time, the inclined guide post fixing block 5 gradually disengages from the stop block 4 or reduces the pressure on the stop block 4, causing the ejector plate 3, the stop block 4, and the ejector pin 12 to move to the right synchronously with the slider 8, so that the ejector pin is pulled out from the screw post B and completely disengaged. At this time, since the limit drive groove 51 has a straight surface, the ejector plate drive connecting rod 10 The end face still abuts against the straight surface inside the limiting drive groove 51, so the position of the ejector plate drive linkage 10 remains unchanged, the end of the ejector sleeve 7 still presses against the screw post B, the elastic element 82 is compressed, and the gap between the ejector plate 1 and the slider 8 is shortened; the inclined guide post fixing block 5 and the inclined guide post 6 continue to move upward. When the ejector plate drive linkage 10 disengages from the limiting drive groove 51, the ejector plate 1 and the ejector plate 2 move to the right under the action of the elastic element 82, so that the end of the ejector sleeve separates from the end of the screw post on the product A, that is, the ejection mechanism in the entire slider disengages from the product A, and at this time the product A can be taken out.
[0043] When the mold is closed: the inclined guide post fixing block 5 and the inclined guide post 6 move vertically downward together under the drive of the front mold, so that the slider 8 starts to move to the left under the action of the inclined guide post 6, so as to move to the molding position (after injection molding, the product A is in close contact with the side of the slider). The inclined guide post fixing block 5 contacts the stop block 4, so that the ejector plate 3, the stop block 4 and the slider 8 move to the left synchronously, so that the ejector pin 12 extends to the molding position to insert into the screw post B after injection molding. The inclined guide post fixing block 5 and the inclined guide post 6 continue to move downward. When the ejector plate drive connecting rod 10 moves to the left under the action of the inclined guide post fixing block 5, the ejector sleeve 7 extends to the left to the molding position, so as to cooperate with the ejector pin 12 for injection molding of the product and the screw post B (the end face of the ejector sleeve 7 abuts against the end of the screw post), and the injection molding machine fills the material flow.
[0044] The beneficial effects of this utility model of a slider ejection mechanism for injection molding are: it solves the problem of unstable production caused by the product sticking to the core-pulling mechanism; by cooperating with the drive component and the ejection component to perform step-by-step movement, it greatly improves the accuracy and stability of injection molding and core pulling, increases product yield and work efficiency, and has a stable and simple structure, which is conducive to safe production.
[0045] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made using the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.
Claims
1. A slider ejection mechanism for injection molding, comprising a front mold and a rear mold, characterized in that, include: The drive assembly is mounted on the front mold and the ejection assembly is mounted on the rear mold; The driving assembly includes a slanted guide post fixing block and a slanted guide post. The slanted guide post fixing block is connected to the front mold. The upper end of the slanted guide post is connected to the slanted guide post fixing block, and its lower end extends outward at an angle. A limit drive groove is provided on the side wall of the slanted guide post fixing block. The ejector assembly includes an ejector plate, an ejector plate, an ejector base plate, a stop block, an ejector sleeve, a slider, an ejector plate drive linkage, and an ejector pin. The slider is provided with an inclined guide groove that is movably connected to the inclined guide post, allowing the slider to move back and forth on the rear mold under the action of the inclined guide post. A movable groove is provided on one side of the slider, and the ejector plate is movably disposed within the movable groove via an elastic element. The ejector plate is connected to the ejector plate. An ejector base plate and a stop block are provided on the slider at the opening of the movable groove. The side wall of the stop block contacts the inclined guide post fixing block, ensuring that the ejector base plate and the stop block move synchronously with the slider under the action of the inclined guide post fixing block. One end of the ejector plate drive linkage is connected to the ejector plate... The needle plate or the ejector plate is connected, and the other end extends outward through the ejector base plate and the stop block to the limiting drive groove. The end face of the ejector plate drive linkage is in contact with the straight surface in the limiting drive groove. The inclined guide post fixing block drives the ejector plate or the ejector plate to move back and forth through the limiting drive groove and the needle plate drive linkage. The ejector sleeve is a hollow structure and moves back and forth under the action of the ejector plate and the ejector plate to form or loosen the screw post. The ejector pin is movably connected to the ejector sleeve, and the ejector pin extends or retracts into the ejector sleeve under the action of the ejector base plate and the stop block.
2. The ejection mechanism for a slider in injection molding according to claim 1, characterized in that, The front mold is provided with an ejection limiting block for limiting and fixing the inclined guide post fixing block.
3. The ejection mechanism for a slider in injection molding according to claim 1, characterized in that, The front mold is provided with a pressure strip that contacts and limits the slider.
4. The ejection mechanism for a slider in injection molding according to claim 1, characterized in that, A gap is provided between the inclined guide groove and the inclined guide post.
5. The ejection mechanism for a slider in injection molding according to claim 1, characterized in that, The rear mold is provided with a slider backscraper, which is movably connected to the inclined guide post fixing block.
6. The ejection mechanism for a slider in injection molding according to claim 1, characterized in that, The rear mold is provided with a slider limiting block to limit the movement distance of the slider.
7. The ejection mechanism for a slider in injection molding according to claim 1, characterized in that, The slider is movably connected to the rear mold via a slide rail guide structure.
8. The ejection mechanism for a slider in injection molding according to claim 1, characterized in that, The stop block is located on the outside of the ejector pin base plate, and the sidewalls of the stop block that contact the inclined guide post fixing block are both inclined guide surfaces.
9. The ejection mechanism for a slider in injection molding according to claim 1, characterized in that, The outer end of the ejector plate drive linkage is chamfered to avoid interference with the inclined guide post fixing block.
10. The ejection mechanism for a slider in injection molding according to claim 1, characterized in that, One end of the ejector sleeve is connected to the ejector plate, and one end of the ejector pin is connected to the ejector base plate or the stop block.