An auxiliary ejection mechanism

Abstract

The utility model discloses a kind of auxiliary ejection mechanism, including ejector pin bottom plate (7) and ejector pin panel (8) being arranged in mould, still include movable mould frame (9) located above ejector pin panel (8), including setting in the ejector pin bottom plate (7) below primary ejector pin plate (6), the separate structure for being equipped with fixed ejector pin panel (8) and ejector pin bottom plate (7) on the ejector pin panel (8);When opening mould, with the movement of KO column, the movement of ejector pin mechanism is driven, so that ejector pin panel (8) and ejector pin bottom plate (7) can be sequentially staged type ascending, realize sectional type stripping, when injection molding machine ejects KO column and continues to eject forward, ejector pin panel (8) drives ejector pin mechanism, ejector pin, top block, inclined top and flat top and other forms of ejection continue to move forward, so that all clamping parts of primary ejector pin plate (6) are separated from the workpiece, and the workpiece is conveniently taken out and stripped after ejection is completed.

Description

Technical Field

[0001] This utility model belongs to the field of injection mold technology, specifically, it relates to an auxiliary ejection mechanism. Background Technology

[0002] An injection molding machine is a molding device that produces plastic products of various shapes by injecting molten plastic into a mold.

[0003] A specification published on August 11, 2020, with application number 201921689226.1, discloses a three-plate mold delayed secondary ejection device, including a fixed mold frame, a fixed mold core, a moving mold stripper plate, a moving mold core, a moving template, a moving mold insert, a slider, a slider insert, an inclined guide post, a moving mold stripper plate limiting block, an ejector plate, an ejector pin fixing plate, a moving mold base plate, an ejector pin, and a mold foot; the moving mold stripper plate is provided with a moving mold core and a spring, the moving template is provided with a moving mold insert, two sliders are respectively provided on both sides of the fixed mold core, the moving mold core, and the moving mold insert, each slider is provided with a slider insert and an inclined guide post, the moving mold stripper plate and the moving template are provided with moving mold stripper plate limiting blocks on both sides, and the ejector pin corresponds to the position of the slag bag on the moving mold core. This utility model adopts a three-plate mold, in which the moving mold unloading plate directly ejects the insert during the first ejection, eliminating the direct action of the ejector pin on the product, thereby improving production efficiency, reducing manufacturing costs, and ensuring the mold life.

[0004] In the current technology, the mechanism of injection molded products is becoming more and more complex, and the ejection of products is becoming increasingly difficult. There are relatively few single ejection structures in the mold. Such ejection structures improve the difficulty of product ejection and the stability and efficiency of mold ejection. Utility Model Content

[0005] The present invention aims to provide an auxiliary ejection mechanism that can assist in convenient mold opening and removal.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: an auxiliary ejection mechanism, including an ejector base plate and an ejector panel disposed in the mold, and a moving mold frame located above the ejector panel, including a primary ejector plate disposed below the ejector base plate, wherein the ejector panel is provided with a separation structure for fixing the ejector panel and the ejector base plate.

[0007] The separation structure consists of hooks at both ends that are connected to the ejector plate and the primary ejector plate, respectively. The cross-section of the hook is U-shaped, and a striker is embedded in the hook. The primary ejector plate has a sliding plate that overlaps the hook.

[0008] The vertical cross-section of the hook is L-shaped. The hook is divided into a mounting part at the top and a long strip part located on the side of the mounting part. The end of the long strip part is provided with a hook-shaped part facing the bottom plate of the ejector pin. The hook-shaped part is located below the slide plate and is conical. The top edge of the slide plate is chamfered and the bottom edge of the impact block is chamfered.

[0009] The ejector pin panel has a groove that mates with the pull hook.

[0010] The slide plate is located in the groove, and a spring is provided between the end surface of the slide plate located in the groove and the inner wall of the groove.

[0011] The primary ejector plate is provided with a pressing block that presses on the slide plate, and the pressing block and the slide plate are in a stepped shape that fits into each other.

[0012] The lateral distance between the impact block and the primary ejector plate should be less than the straight-line distance between the hook and the primary ejector plate.

[0013] The end of the impact block is provided with an insert that is embedded in the moving mold frame. The end of the impact block is fixed to the moving mold frame by bolts. The impact block is T-shaped, and the insert is located at the head of the T-shaped impact block.

[0014] The end of the hook is fixed to the ejector plate by bolts.

[0015] The technical effect of this utility model is as follows: when the injection molding machine ejects the K and O pillars and continues to eject forward, the ejector plate drives the ejector mechanism, and the ejector pins, ejector blocks, angled ejectors and flat ejectors continue to move forward, so that the ejector pins, ejector blocks, angled ejectors and flat ejectors of all clamping parts on the ejector plate disengage from the workpiece, so that the workpiece can be easily removed and demolded after ejection. Attached Figure Description

[0016] This manual includes the following figures, which illustrate the following: Figure 1 This is a schematic diagram of the structure of an auxiliary ejection mechanism according to the present invention; Figure 2 for Figure 1 An explosion diagram of an auxiliary ejection mechanism; Figure 3 for Figure 1 A schematic diagram of the assembly of a hook and a striking block in an auxiliary ejection mechanism; Figure 4 for Figure 1 A schematic diagram of a hook in an auxiliary ejection mechanism; Figure 5 for Figure 1 A schematic diagram of a pressure block in an auxiliary ejection mechanism; Figure 6 for Figure 1A schematic diagram of a ramming block in an auxiliary ejection mechanism; Figure 7 for Figure 1 A schematic diagram of a sliding plate with an auxiliary ejection mechanism.

[0017] The markings in the diagram are: 1. Impact block; 2. Hook; 3. Pressure block; 4. Slide plate; 5. Spring; 6. Primary ejector plate; 7. Ejector base plate; 8. Ejector panel; 9. Moving mold frame; 10. Hook-shaped part; 11. Insert. Detailed Implementation

[0018] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, in order to help those skilled in the art to have a more complete, accurate and in-depth understanding of the utility model concept and technical solution, and to facilitate its implementation.

[0019] Please see Figure 1-7 An auxiliary ejection mechanism includes an ejector base plate 7 and an ejector panel 8 disposed within the mold, and a moving mold frame 9 located above the ejector panel 8. It also includes a primary ejector plate 6 disposed below the ejector base plate 7. The ejector panel 8 has a separation structure for fixing the ejector panel 8 and the ejector base plate 7. The separation structure fixes the ejector panel 8, the ejector base plate 7, and the moving mold frame 9 together. During mold opening, as the K and O pillars move, the ejector mechanism moves, allowing the ejector panel 8 and the ejector base plate 7 to rise sequentially in stages, achieving segmented demolding. When the injection molding machine ejects the K and O pillars and continues to eject forward, the ejector panel 8 drives the ejector mechanism, with ejectors, ejector blocks, angled ejectors, and flat ejectors continuing to move forward. This causes all ejector mechanisms such as ejectors, ejector blocks, angled ejectors, and flat ejectors on the primary ejector plate 6 to detach from the workpiece, achieving the effect of easy removal and demolding of the workpiece after ejection.

[0020] The separation structure consists of hooks 2 connected at both ends to the ejector plate 8 and the primary ejector plate 6, respectively. The cross-section of hook 2 is U-shaped, and a stop block 1 is embedded within hook 2. A sliding plate 4, which overlaps the hook 2, is located within the primary ejector plate 6. Hook 2 connects the ejector plate 8 and the primary ejector plate 6 together. The stop block 1 restricts the position of hook 2, thereby limiting the displacement of the primary ejector plate 6, ejector plate 8, and ejector base plate 7. As the KO column moves, it drives the ejector plate 8, ejector base plate 7, and primary ejector plate 6 upwards. Since hook 2 connects all three, as the KO column pushes the ejector plate 8 upwards, the sliding plate 4, restrained by the stop block 1, is pushed to a point where it is in close contact with the stop block 1. As the KO column continues to push forward, the ejector top plate and ejector base plate 7 drive hook 2 upwards, while the sliding plate 4 within the primary ejector plate 6 is restrained by the stop block 1. The hook 2 is held in place by the impact block 1. As the hook 2 is driven by the ejector plate 8, it is continuously pushed upward. Under the pressure of the impact block 1 and the hook 2, the slide plate 4 is squeezed into the primary ejector plate 6. The slide plate 4 and the impact block 1 no longer restrict each other. During the process of the ejector plate 8 rising, as the slide plate 4 is squeezed into the primary ejector plate 6, there is a certain displacement difference between the displacement distance of the ejector plate 8, the ejector base plate 7 and the primary ejector plate 6. Therefore, when the hook 2 is separated from the slide plate 4, the primary ejector plate 6 is no longer connected to the ejector top plate and stops moving. As the KO column continues to move upward, the primary ejector plate 6 stays in place. The ejector base plate 7 and the primary ejector plate 6 have separated. The ejector top plate and the ejector base plate 7 continue to rise under the action of the KO column, so that the ejector pins, ejector blocks, inclined ejectors and flat ejectors of all the clamping parts on the primary ejector plate 6 are separated from the workpiece, so that the workpiece can be easily removed and demolded after ejection.

[0021] The vertical cross-section of the hook 2 is L-shaped. The hook 2 is divided into a mounting part at the top and a long strip part located on the side of the mounting part. The end of the long strip part is provided with a hook-shaped part 10 facing the ejector plate 7. The hook-shaped part 10 is located below the slide plate 4 and is tapered. The top edge of the slide plate 4 is chamfered, and the bottom edge of the impact block 1 is chamfered. The top of the hook 2 is fixed to the ejector plate 8 by bolts. The hook 2 can move synchronously with the ejector plate 8. When the hook 2 rises, the slide plate 4 is located between the hook-shaped part 10 and the bottom end of the impact block 1. Under the action of the hook 2, the two chamfered edges of the slide plate 4 and the impact block 1 are pressed tightly together. As the hook 2 continues to apply pressure, the slide plate 4 is pushed towards a... The secondary ejector plate 6 moves until the slide plate 4 and the impact block 1 are misaligned. The impact block 1 no longer blocks the slide plate 4. During the misalignment of the slide plate 4 and the impact block 1, the hook-shaped part 10 is conical and will also rise and push the slide plate 4 to move. At this time, the displacement distance of the ejector plate 8 connected to the pull hook 2 is greater than the displacement distance of the primary ejector plate 6. Therefore, the primary ejector plate 6 and the ejector base plate 7 will separate and the primary ejector plate 6 will stop moving. At the same time, when the ejector top plate descends, the pull hook 2 also descends together. The hook-shaped part 10 of the pull hook 2 is conical. During the descent, the hook-shaped part 10 fits against the slide plate 4, thereby pushing the slide plate 4 into the primary ejector plate 6 to complete the reset.

[0022] The ejector plate 8 has a groove that mates with the hook 2; this facilitates the installation of the hook 2, and since the end of the hook 2 is embedded in the ejector plate 8, it can improve the stability of the installation, reduce shaking and reduce the risk of breakage.

[0023] The slide plate 4 is located in the groove, and a spring 5 is provided between the end surface of the slide plate 4 located in the groove and the inner wall of the groove. The spring 5 is used to push the spring 5 to reset, and the slide plate 4 can be stored in the groove. The inner surface of the slide plate 4 is provided with a hole for storing the spring 5, so that the spring 5 can be compressed into the slide plate 4 and prevent the spring 5 from falling off.

[0024] The primary ejector plate 6 has a pressure block 3 that presses against the slide plate 4. The pressure block 3 and the slide plate 4 are stepped and interlocked. The width of the pressure block 3 is greater than the width of the slide plate 4. The groove on the primary ejector plate 6 for receiving the slide plate 4 has a stepped cross-section. The pressure block 3 is positioned above the slide plate 4. The two ends of the pressure block 3 are fixed to the two ends of the stepped groove by bolts, which can effectively fix the pressure block 3 and prevent it from loosening. At the same time, since the end of the pressure block 3 that contacts the slide plate 4 is stepped and interlocked, it can effectively prevent the slide plate 4 from being ejected from the primary ejector plate 6 by the spring 5. The pressure block 3 restricts the precise position of the slide plate 4, so that when the slide plate 4 is moved, it can accurately contact the impact block 1.

[0025] The lateral distance between the impact block 1 and the primary ejector plate 6 should be less than the straight-line distance between the hook 2 and the primary ejector plate 6; this ensures that when the slide plate 4 and the impact block 1 are misaligned, the slide plate 4 will not restrict the movement of the hook 2.

[0026] The end of the impact block 1 is provided with an insert 11 that is embedded in the moving mold frame 9. The end of the impact block 1 is fixed to the moving mold frame 9 by bolts. The impact block 1 is T-shaped, and the insert 11 is set at the head of the T-shape of the impact block 1. Since the ejector plate 8 needs to push the slide plate 4 into the primary ejector plate 6 during the movement, a large force is required. Therefore, the impact block 1 needs to withstand a large shearing force. By installing the insert 11, the installation stability of the impact block 1 can be improved and the risk of the impact block 1 falling off can be reduced.

[0027] The end of the hook 2 is fixed to the ejector plate 8 with bolts to increase the stability of the installation.

[0028] Working principle: During the mold opening process, the KO column pushes the ejector plate 8 upward. The ejector plate 8 drives the primary ejector plate 6 and the ejector base plate 7 to move via the pull hook 2. The slide plate 4 inside the primary ejector plate 6 is restricted by the impact block 1. The slide plate 4 is held in place by the impact block 1. As the pull hook 2 is driven by the ejector plate 8, it is continuously pushed upward. Under the compression of the impact block 1 and the pull hook 2, the slide plate 4 is squeezed into the primary ejector plate 6. The slide plate 4 and the impact block 1 no longer restrict each other. During the upward movement of the ejector plate 8, as the slide plate 4 is squeezed into the primary ejector plate 6, when the pull hook 2 rises, the slide plate 4 is located between the hook-shaped part 10 and the bottom end of the impact block 1. Under the drive of the pull hook 2, the two chamfered edges of the slide plate 4 and the impact block 1 are tightly pressed together. As the pull hook 2 continues to apply pressure, the slide plate 4 is pushed towards the primary ejector plate 6. The secondary ejector plate 6 moves within the plate until the slide plate 4 and the impact block 1 are misaligned. The impact block 1 no longer blocks the slide plate 4. During the misalignment of the slide plate 4 and the impact block 1, the hook-shaped part 10 will also rise and push the slide plate 4 to move. At this time, the displacement distance of the ejector plate 8 connected to the hook 2 is greater than the displacement distance of the primary ejector plate 6. Therefore, the primary ejector plate 6 and the ejector base plate 7 will separate. The primary ejector plate 6 stops moving. As the KO column continues to move upward, the primary ejector plate 6 stops in place. The ejector base plate 7 and the primary ejector plate 6 have separated. The ejector top plate and the ejector base plate 7 continue to rise under the action of the KO column, so that the ejector pins, ejector blocks, inclined ejectors and flat ejectors of all clamping parts on the primary ejector plate 6 are disengaged from the workpiece, so that the workpiece can be easily removed and demolded after ejection.

[0029] The technical effect of this utility model is as follows: When the injection molding machine ejects the K and O pillars and continues to eject forward, the ejector plate 8 drives the ejector mechanism, and the ejector pins, ejector blocks, angled ejectors, and flat ejectors continue to move forward, causing all the ejector pins, ejector blocks, angled ejectors, and flat ejectors of the clamping parts on the primary ejector plate 6 to disengage from the workpiece, thus facilitating the removal and demolding of the workpiece after ejection. The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention; or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. An auxiliary ejection mechanism, comprising an ejector base plate (7) and an ejector panel (8) disposed within a mold, and further comprising a moving mold frame (9) located above the ejector panel (8), characterized in that: It includes a primary ejector plate (6) located below the ejector base plate (7), and the ejector panel (8) is provided with a separation structure for fixing the ejector panel (8) and the ejector base plate (7).

2. The auxiliary ejection mechanism according to claim 1, characterized in that: The separation structure is a hook (2) that is connected to the ejector plate (8) and the primary ejector plate (6) at both ends respectively. The cross-section of the hook (2) is U-shaped. A bumper (1) is embedded in the hook (2). A sliding plate (4) that overlaps the hook (2) is provided in the primary ejector plate (6).

3. The auxiliary ejection mechanism according to claim 2, characterized in that: The vertical cross-section of the hook (2) is L-shaped. The hook (2) is divided into a mounting part at the top and a long strip part located on the side of the mounting part. The end of the long strip part is provided with a hook-shaped part (10) facing the pin base plate (7). The hook-shaped part (10) is located below the slide plate (4). The hook-shaped part (10) is conical. The top edge of the slide plate (4) is chamfered, and the bottom edge of the impact block (1) is chamfered.

4. An auxiliary ejection mechanism according to claim 2 or 3, characterized in that: The ejector pin panel (8) has a groove that mates with the hook (2).

5. The auxiliary ejection mechanism according to claim 4, characterized in that: The slide plate (4) is located in the groove, and a spring (5) is provided between the end surface of the slide plate (4) located in the groove and the inner wall of the groove.

6. The auxiliary ejection mechanism according to claim 5, characterized in that: The primary ejector plate (6) is provided with a pressure block (3) that presses on the slide plate (4), and the pressure block (3) and the slide plate (4) are in a stepped shape that fits into each other.

7. The auxiliary ejection mechanism according to claim 2, characterized in that: The branch distance between the impact block (1) and the primary ejector plate (6) is less than the straight distance between the hook (2) and the primary ejector plate (6).

8. An auxiliary ejection mechanism according to claim 2, characterized in that: The end of the impact block (1) is provided with an insert (11) embedded in the moving mold frame (9). The end of the impact block (1) is fixed to the moving mold frame (9) by bolts. The impact block (1) is T-shaped, and the insert (11) is set at the head of the T-shape of the impact block (1).

9. An auxiliary ejection mechanism according to claim 2, characterized in that: The end of the hook (2) is fixed to the ejector plate (8) by bolts.

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