Injection mold narrow space under the reverse buckle strong mechanism

Abstract

The utility model discloses a kind of injection mould narrow space in back-off strong mechanism, including A plate, B plate, square iron, ejector rod plate, ejector rod bottom plate, bottom plate, reset lever, spring one, ejector pin, transmission rod, sliding block, spring two, fixed rod, fixed block, connecting block, spring three, insert, back mould and injection product.The utility model is used for the demoulding of injection product narrow space in back-off structure, when the ejection stage starts, ejector pin promotes injection product to move upwards, insert moves up synchronously, after injection product and back mould are separated, back-off outside has enough deformation space, satisfies the condition of forced demoulding, subsequently, ejector pin continues to eject product, while insert starts to move downwards, realizes the forced demoulding of back-off, the mechanism can effectively simplify injection mould design, reduce production cost.

Description

Technical Field

[0001] This utility model relates to an undercut strong release mechanism in the narrow space of an injection mold, used for undercut demolding in narrow holes of injection molded products. Background Technology

[0002] As injection mold structures become increasingly compact and complex, the demand for undercut demolding in confined spaces is growing. Due to space constraints, traditional slider mechanisms are difficult to implement, making undercut demolding a technical challenge. Therefore, it is necessary to develop an undercut demolding mechanism suitable for limited spaces, capable of reliable demolding without sliders, thereby improving the adaptability of the mold structure and demolding efficiency. Summary of the Invention

[0003] A backstop mechanism for use in a confined space of an injection mold includes an A plate, a B plate, a square block, an ejector plate, an ejector base plate, a base plate, a reset rod, a spring 1, an ejector pin, a transmission rod, a slider, a spring 2, a fixing rod, a fixing block, a connecting block, a spring 3, an insert, a rear mold, and an injection molded product. The injection molded product has a backstop structure inside the annular rib on its lower surface. The upper end of the transmission rod passes through the fixing block and is securely mounted to the lower end of the connecting block. The lower end of the transmission rod is fitted into corresponding square holes in the ejector plate and ejector base plate. The slider is fitted into a groove at the lower end of the ejector plate and can move left and right within the groove. One end of the slider is in contact with a snap-fit ​​engagement with the lower end of the transmission rod. Spring 2 is installed in the circular groove of the slider. The upper end of the fixing rod is securely mounted to the fixing block. The lower end of the fixing rod is fitted into a corresponding square hole in the ejector plate. The lower end of the fixing rod is designed with a slope and can contact the sloped side of the slider. The fixing block is fixedly mounted on the lower end of the B plate, and the connecting block is fitted into the groove at the lower end of the B plate. The connecting block can move up and down between the fixed block and the B plate. Spring 3 is installed in the groove at the upper end of the connecting block. The lower end of the insert is fastened to the connecting block. The upper end of the insert passes through the B plate and is installed in the corresponding round hole of the rear mold with clearance fit and can slide up and down in this hole. The upper end of the insert corresponds to the undercut structure inside the annular rib on the lower surface of the injection molded product. The rear mold is fixedly installed in the groove of the B plate with the corresponding shape. The A plate is flush with the B plate around its perimeter. The upper end of the square iron is fastened to the B plate. The lower end of the square iron is fixedly installed to the base plate. The lower end of the ejector pin is fixedly installed to the ejector plate. The upper end of the ejector pin passes through the B plate and is installed in the corresponding round hole of the rear mold with clearance fit. The ejector plate and the ejector base plate are fixedly installed. The reset rod is covered with spring 1. The lower end of the reset rod is fastened to the ejector plate. The upper end of the reset rod is installed in the corresponding round hole of the B plate with clearance fit. The reset rod can pass through the B plate during the ejection process. The ejector base plate is fitted and installed on the base plate.

[0004] The beneficial effects of this utility model are as follows: the undercut strong release mechanism in the confined space of the injection mold first separates the product from the rear mold by synchronously moving the product and insert upwards, providing deformation space for the undercut; then the ejector pin continues to eject the product, while the insert moves in the opposite direction, achieving forced demolding at the undercut. This mechanism is reliable, effectively simplifies the mold structure, and reduces production costs. Attached Figure Description

[0005] Figure 1 This is a schematic diagram of the overall structure of the inverted strong release mechanism in a confined space.

[0006] Figure 2 This is a partial structural diagram of the inverted release mechanism in a confined space.

[0007] Figure 3 This is a partial structural diagram of the inverted release mechanism in a confined space.

[0008] Figure 4 for Figure 3 Sectional view of plane AA.

[0009] Figure 5 This is a partial structural diagram of the inverted release mechanism in a confined space.

[0010] Figure 6 This is a partial structural diagram of the inverted release mechanism in a confined space.

[0011] Figure 7 This is a partial structural diagram of the inverted release mechanism in a confined space.

[0012] Figure 8 This is a schematic diagram of the structure of an injection-molded product.

[0013] Figure 9 This is a schematic diagram of the insert structure.

[0014] Figure 10 This is a schematic diagram of the fixed rod structure.

[0015] Figure 11 This is a partial structural diagram of the inverted release mechanism in a confined space.

[0016] The components are: 1. Plate A; 2. Plate B; 3. Square iron; 4. Ejector plate; 5. Ejector base plate; 6. Base plate; 7. Reset rod; 8. Spring 1; 9. Ejector pin; 10. Transmission rod; 11. Slider; 12. Spring 2; 13. Fixing rod; 14. Fixing rod; 15. Connecting block; 16. Spring 3; 17. Insert; 18. Rear mold; 19. Injection molded product. Detailed Implementation

[0017] As attached Figures 1-11As shown, a backing mechanism for forceful release in the confined space of an injection mold includes an A plate 1, a B plate 2, a square iron 3, an ejector plate 4, an ejector base plate 5, a base plate 6, a reset rod 7, a spring 1 8, an ejector pin 9, a transmission rod 10, a slider 11, a spring 2 12, a fixing rod 13, a fixing block 14, a connecting block 15, a spring 3 16, an insert 17, a rear mold 18, and an injection molded product 19.

[0018] As attached Figure 7 and attached Figure 8 As shown, there is an undercut structure inside the annular rib on the lower surface of the injection molded product 19, and the upper end of the insert 17 corresponds to the undercut structure of the injection molded product 19.

[0019] As attached Figures 1-11 As shown, during mold opening, plate A1 moves upward away from plate B2, and ejector plate 4 and ejector base plate 5 move upward synchronously. Ejector plate 4 and ejector base plate 5 drive reset rod 7, ejector pin 9 and slider 11 to move upward and compress spring 8. Slider 11 drives transmission rod 10 to move upward, and transmission rod 10 drives connecting block 15 and insert 17 to move upward and compress spring 16. Under the drive of ejector pin 9, injection molded product 19 moves upward synchronously with insert 17 and separates from rear mold 18. This process provides the necessary deformation space for forced demolding of subsequent injection molded product 19 at the undercut. During the upward movement of slider 11, its side slope and the lower end of transmission rod 10... After the inclined surfaces make contact, the slider 11 generates radial displacement to move away from the transmission rod 10 and compress the second spring 12. When the slider 11 completely disengages from the lower end of the transmission rod 10, its side inclined surface and the lower end inclined surface of the transmission rod 10 simultaneously disengage. The radial movement of the slider 11 stops, and the slider 11 stops driving the transmission rod 10 upward. At this time, the third spring 16 releases its elastic potential energy to push the transmission rod 10, the connecting block 15, and the insert 17 downward to the initial position. At the same time, the ejector plate 4 and the ejector base plate 5 continue to move upward and push the ejector pin 9 to push the injection molded product 19 out of the insert 17, thereby completing the forced demolding of the undercut area and ending the demolding action.

[0020] After the injection molding cycle is completed, the upward pushing force of the ejector plate 5 disappears. Subsequently, the elastic potential energy of spring 8 is released, driving the ejector plate 4, ejector plate 5, ejector pin 9, and slider 11 to move downward to the initial position. During this process, when slider 11 descends to the lower end of the transmission rod 10, spring 12 releases its elastic potential energy to push slider 11 back to its original position. Plate A 1 moves downward to its initial position and engages with plate B 2, preparing for the next injection molding cycle. This mechanism has a compact structure, occupies little space, and can effectively achieve undercut demolding in confined spaces.

[0021] The above description is a preferred embodiment of the present utility model and is intended to illustrate the content and concept of this application. The content of this specification should not be construed as a limitation of the present utility model.

Claims

1. A backing mechanism for forceful release in a confined space of an injection mold, comprising an A plate (1), a B plate (2), a square iron (3), an ejector plate (4), an ejector base plate (5), a base plate (6), a reset rod (7), a spring one (8), an ejector pin (9), a transmission rod (10), a slider (11), a spring two (12), a fixing rod (13), a fixing block (14), a connecting block (15), a spring three (16), an insert (17), a rear mold (18), and an injection molded product (19), characterized in that, The injection-molded product (19) has an undercut structure on the inner side of the annular rib on the lower surface. The upper end of the transmission rod (10) passes through the fixing block (14) and is fastened to the lower end of the connecting block (15). The lower end of the transmission rod (10) is fitted into the corresponding square holes of the ejector plate (4) and the ejector base plate (5). The slider (11) is fitted into the groove at the lower end of the ejector plate (4) and can move left and right in the groove. One end of the slider (11) is in contact with the lower end of the transmission rod (10) through a snap-fit. The second spring (12) is installed in the circular groove of the slider (11). The fixing rod (1) 3) The upper end is fastened to the fixing block (14), and the lower end of the fixing rod (13) is fitted into the corresponding square hole of the ejector plate (4). The lower end of the fixing rod (13) is designed with a bevel and can contact the bevel of the side of the slider (11). The fixing block (14) is fixedly installed at the lower end of the B plate (2). The connecting block (15) is fitted into the groove at the lower end of the B plate (2), and the connecting block (15) can move up and down between the fixing block (14) and the B plate (2). The spring three (16) is installed in the groove at the upper end of the connecting block (15). The lower end of the insert (17) The insert (17) is fastened to the connecting block (15). The upper end of the insert (17) passes through the B plate (2) and is installed in the corresponding round hole of the rear mold (18) with a clearance fit. It can slide up and down in this hole. The upper end of the insert (17) corresponds to the undercut structure inside the annular rib on the lower surface of the injection molded product (19). The rear mold (18) is fixedly installed in the groove of the B plate (2) with a corresponding shape. The A plate (1) is flush with the B plate (2) around its perimeter. The upper end of the square iron (3) is fastened to the B plate (2). The lower end of the square iron (3) is fixedly installed to the bottom plate (6). The lower end of the pin (9) is fixedly installed on the ejector plate (4). The upper end of the ejector pin (9) passes through the B plate (2) and is installed in the corresponding round hole of the rear mold (18) with clearance fit. The ejector plate (4) and the ejector base plate (5) are fixedly installed. The reset rod (7) is covered with a spring (8). The lower end of the reset rod (7) is fastened to the ejector plate (4). The upper end of the reset rod (7) is installed in the corresponding round hole of the B plate (2) with clearance fit. The reset rod (7) can pass through the B plate (2) during the ejection process. The ejector base plate (5) is fitted on the base plate (6).

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