A kind of inclined ejection structure for injection mold

Abstract

The utility model provides a kind of for injection mold's inclined top structure, comprising:A plate, B plate, front die, rear die, inclined top, demolding ejector pin, reset ejector pin and ejector pin plate, front die is set in A plate inside close to B plate one side, rear die is set in B plate inside close to A plate one side, rear die is set apart from A plate one side and is equipped with avoiding hole, inclined top includes driving cube and forming inclined block, driving cube is movably set in avoiding hole, one end of forming inclined block is fixed in the top surface of driving cube, the other end of forming inclined block is slidably inclined and passes through rear die, one end of demolding ejector pin is fixed in ejector pin plate, the other end of demolding ejector pin passes through B plate, and top is set in the bottom surface of driving cube, for driving inclined top and ejecting demolding, one end of reset ejector pin is fixed in front die, the other end of reset ejector pin is slidably set into avoiding hole along first direction when moulding, and top is set in the top surface of driving cube, for the reset of inclined top when moulding.

Description

Technical Field

[0001] This utility model belongs to the field of complex mold technology, and in particular relates to a sloping top structure for injection molds. Background Technology

[0002] like Figure 1 As shown, a common injection mold generally includes a front mold 80 and a rear mold 90. The front mold 80 includes a front mold fixing plate 81, an A plate 82, and a front mold core 83. The front mold fixing plate 81 and the A plate 82 are fixedly connected. The front mold core 83 is embedded and fixed on the A plate 82 on the side away from the front mold fixing plate 81. The rear mold 90 includes a B plate 91, a rear mold core 92, and an ejector pin 93. The rear mold core 92 is embedded on the B plate 91 on the side close to the A plate 82. One end of the ejector pin 93 is fixed in the ejector plate 94, and the other end passes through the B plate 91 and the rear mold core 92 in sequence. The ejector plate 94 can be set on the side of the B plate 91 away from the A plate 81, either away from or close to it. After the product is injected, the B plate 91 gradually moves away from the A plate 82 to complete the mold opening. Finally, the injection molded product left on the rear mold 90 is ejected by the ejector pin 93 to complete the demolding and obtain the molded part.

[0003] Currently, existing injection molded products with undercuts generally require the use of angled ejectors for release. Typically, one end of the angled ejector is slidably mounted on the ejector plate, and the ejector plate pushes the angled ejector out for release. However, when the length of the angled ejector required for release is long and the wall thickness of the undercut area of ​​the injection molded product is thin, or when the required angled ejector tilt angle is large, it becomes difficult to accurately control the ejection displacement of the angled ejector. In such cases, the injection molded product is easily punctured. Therefore, how to replace long angled ejectors or large-angle angled ejectors for stable release of injection molded products has become a problem that needs to be solved. Utility Model Content

[0004] To address the aforementioned technical problems, this utility model provides a slanted ejector structure for injection molds, which solves the problem of how to replace long slanted ejectors or large-angle slanted ejectors for stable disengagement of injection molded products.

[0005] This utility model provides a slanted ejector structure for injection molds, used for ejecting the molded product from a second direction after the mold opens in a first direction. The slanted ejector structure includes: an A plate, a B plate, a front mold core, a rear mold core, a slanted ejector, a ejector pin, a reset ejector pin, and an ejector plate. The front mold core is located inside the A plate on the side closest to the B plate, and the rear mold core is located inside the B plate on the side closest to the A plate. A clearance hole is provided on the side of the rear mold core away from the A plate. The slanted ejector includes a driving block and a forming slant block. The driving block is movably disposed within the clearance hole along the first and second directions. One end of the forming inclined block is fixed to the top surface of the driving block, and the other end of the forming inclined block can slide and tilt through the rear mold core. It is used to cooperate with the rear mold core and the front mold core to form the injection molded product during injection molding. One end of the ejector pin is fixed inside the ejector plate. The other end of the ejector pin passes through the B plate and is pushed on the bottom surface of the driving block. It is used to drive the inclined ejector to eject and demold. One end of the reset ejector pin is fixed to the front mold core. The other end of the reset ejector pin slides along the first direction into the clearance hole and is pushed on the top surface of the driving block during mold closing. It is used to reset the inclined ejector during mold closing.

[0006] Optionally, the distance between the top surface of the driving block and the bottom of the clearance hole is the first distance, and the maximum distance between the B plate and the ejector plate is the second distance, with the first distance being greater than the second distance.

[0007] Optionally, the inclined top structure also includes a limiting block, which is fixed to the side of the B plate near the ejector plate.

[0008] Optionally, the clearance hole can be a square hole.

[0009] Optionally, one end of the shaped wedge can be detachably fixed to the top surface of the drive block.

[0010] Optionally, one end of the shaped wedge can be detachably fixed to the top surface of the drive block by bolts.

[0011] Optionally, the surface of the sloping top is provided with a nitrided layer.

[0012] Optionally, the inclined top structure also includes a positioning tube, which is fitted onto the other end of the ejector pin and is embedded in plate B.

[0013] Optionally, the ejector plate includes an ejector face plate and an ejector base plate, with one end of the demolding ejector pin inserted and fixed inside the ejector face plate, and the end face of one end of the demolding ejector pin abutting against the ejector base plate.

[0014] Optionally, one end of the reset ejector pin is pluggably fixed inside the front mold core, and the end face of one end of the reset ejector pin is in close contact with plate A.

[0015] Compared with the prior art, the inclined ejector structure for injection molds provided by this utility model is ingeniously designed. When the injection molded product is thin and the required inclined ejector for disengagement is long or the required inclined ejector tilt angle is large, the length of the inclined ejector can be greatly shortened, thereby increasing the service life of the inclined ejector and greatly improving the quality of the injection molded product. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of a commonly used injection mold.

[0018] Figure 2 This is a schematic diagram of the inclined top structure for an injection mold before mold opening, according to an embodiment of the present invention.

[0019] Figure 3 This is a schematic diagram of the inclined ejector structure for an injection mold after disengagement, according to an embodiment of the present invention. Detailed Implementation

[0020] To provide a better understanding of the purpose, structure, features, and functions of this utility model, detailed descriptions are provided below with reference to specific embodiments.

[0021] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., 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.

[0022] Please refer to the reference. Figure 2 and Figure 3 As shown, this utility model provides a slanted ejector structure 100 for injection molds, which is used as a locking position 102 for ejecting the injection molded product 101 from the second direction Y after the mold is opened along the first direction X. The slanted ejector structure 100 includes: A plate 1, B plate 2, front mold core 3, rear mold core 4, slanted ejector 5, ejector pin 61, reset ejector pin 62 and ejector plate 7.

[0023] The front mold core 3 is located inside plate A 1 on the side close to plate B 2.

[0024] The rear mold core 4 is located inside plate B 2 on the side close to plate A 1, and a clearance hole 41 is provided on the side of the rear mold core 4 away from plate A 1.

[0025] The inclined ejector 5 includes a driving block 51 and a forming inclined block 52. The driving block 51 is movably disposed in the clearance hole 41 along the first direction X and the second direction Y. One end of the forming inclined block 52 is fixed to the top surface of the driving block 51, and the other end of the forming inclined block 52 can slide obliquely through the rear mold core 4, and is used to cooperate with the rear mold core 4 and the front mold core 3 to form the injection molded product 101 during injection molding.

[0026] One end of the ejector pin 61 is fixed inside the ejector plate 7, and the other end of the ejector pin 61 passes through the B plate 2 and is positioned on the bottom surface of the drive block 51 to drive the inclined ejector 5 to eject the snap-fit ​​102 for demolding.

[0027] One end of the reset ejector pin 62 is fixed to the front mold core 3, and the other end of the reset ejector pin 62 slides through the first direction X into the clearance hole 41 and then pushes against the top surface of the drive block 51 during mold closing, for the reset of the inclined ejector pin 5 during mold closing.

[0028] Optionally, the distance between the top surface of the drive block 51 and the bottom of the relief hole 41 is a first distance H, and the maximum distance between the B plate 2 and the ejector plate 7 is a second distance L, where the first distance H is greater than the second distance L. This ensures that the angled ejector 5 does not collide with the rear mold core 4.

[0029] Optionally, the inclined ejector structure 100 also includes a limiting block 21, which is fixed on the side of the B plate 2 near the ejector plate 7. This facilitates precise limitation of the ejection displacement of the ejector plate 7, thereby precisely controlling the ejection amount of the inclined ejector 5.

[0030] Optionally, the clearance hole 41 is a square hole. This facilitates better movement of the drive block 51 within it.

[0031] Optionally, one end of the forming inclined block 52 can be detachably fixed to the top surface of the driving block 51. This facilitates the disassembly and maintenance of the inclined top 5.

[0032] Optionally, one end of the shaped inclined block 52 can be detachably fixed to the top surface of the drive block 51 by bolts. This facilitates better installation, fixing, and disassembly.

[0033] Optionally, the surface of the inclined top 5 is provided with a nitrided layer. This can enhance the wear resistance of the inclined top 5.

[0034] Optionally, the inclined ejector structure 100 also includes a positioning tube 22, which is fitted onto the other end of the ejector pin 61 and is embedded within plate B 2. This prevents the ejector pin 61 from wobbling and facilitates the precise pushing of the inclined ejector pin 5 by the ejector pin 61.

[0035] Optionally, the ejector plate 7 includes an ejector face plate 71 and an ejector base plate 72. One end of the ejector pin 61 is inserted and fixed inside the ejector face plate 71, and the end face of one end of the ejector pin 61 is close to the ejector base plate 72. This facilitates the detachable fixing of the ejector pin 61.

[0036] Optionally, one end of the reset ejector pin 62 can be detachably fixed inside the front mold core 3, and the end face of one end of the reset ejector pin 62 is in close contact with plate A 1. This facilitates the detachable fixing of the reset ejector pin 62.

[0037] The operating principle of the inclined ejector structure 100100 for injection molds of this utility model is as follows: When the mold opens, plate B2 moves away from plate A1 along the first direction X to complete the mold opening. Then, ejector plate 7 drives ejector pin 61 to push the inclined ejector 5 towards plate A1 along the first direction X. At this time, the inclined ejector 5 has displacement in both the first direction X and the second direction Y. Under the action of the inclined ejector 5, the injection molded product 101 moves closer to plate A1 along the first direction X, but the injection molded product 101 remains stationary in the second direction Y. At this time, the inclined ejector 5 begins to separate from the injection molded product 101 in the second direction Y until the release is completed.

[0038] When the mold is closed, plate B2 begins to approach plate A1 along the first direction X, and reset ejector pin 62 begins to insert into the rear mold core 4. When reset ejector pin 62 is positioned on the top surface of drive block 51, it begins to drive the inclined ejector 5 to reset. When the mold is closed, the inclined ejector 5 has just completed its reset.

[0039] The inclined ejector structure for injection molds provided by this utility model is ingeniously designed. When the injection molded product is thin and the required inclined ejector for disengagement is long or the required inclined ejector tilt angle is large, the length of the inclined ejector can be greatly shortened, thereby increasing the service life of the inclined ejector and greatly improving the quality of the injection molded product.

[0040] This utility model has been described by the above-described embodiments; however, these embodiments are merely examples for implementing this utility model. It must be noted that the disclosed embodiments do not limit the scope of this utility model. Conversely, any modifications and refinements made without departing from the spirit and scope of this utility model are within the scope of patent protection of this utility model.

Claims

1. A slanted ejector structure for an injection mold, used for ejecting the molded product from a second direction after the mold opens in a first direction, characterized in that, The inclined ejector structure includes: plate A, plate B, front mold core, rear mold core, inclined ejector, demolding ejector pin, reset ejector pin, and ejector plate; The front mold core is located inside plate A on one side near plate B; The rear mold core is located inside the B plate on the side close to the A plate, and a clearance hole is provided on the side of the rear mold core away from the A plate; The inclined ejector includes a driving block and a forming inclined block. The driving block is movably disposed in the clearance hole along the first direction and the second direction. One end of the forming inclined block is fixed to the top surface of the driving block, and the other end of the forming inclined block can slide obliquely through the rear mold core for use in injection molding to cooperate with the rear mold core and the front mold core to form an injection molded product. One end of the ejector pin is fixed inside the ejector plate, and the other end of the ejector pin passes through the B plate and is pushed against the bottom surface of the drive block to drive the inclined ejector to eject the mold. One end of the reset ejector pin is fixed to the front mold core, and the other end of the reset ejector pin can slide through the clearance hole in the first direction during mold closing and then push against the top surface of the drive block for resetting the inclined ejector pin during mold closing.

2. The inclined ejector structure for injection molds as described in claim 1, characterized in that, The distance between the top surface of the drive block and the bottom of the clearance hole is the first distance, and the maximum distance between the B plate and the ejector plate is the second distance. The first distance is greater than the second distance.

3. The inclined ejector structure for injection molds as described in claim 1, characterized in that, It also includes a limiting block, which is fixed to the side of the B plate near the ejector plate.

4. The inclined ejector structure for injection molds as described in claim 1, characterized in that, The clearance hole is a square hole.

5. The inclined ejector structure for injection molds as described in claim 1, characterized in that, One end of the shaped inclined block is detachably fixed to the top surface of the drive block.

6. The inclined ejector structure for injection molds as described in claim 1, characterized in that, One end of the shaped inclined block is detachably fixed to the top surface of the drive block by bolts.

7. The inclined ejector structure for injection molds as described in claim 1, characterized in that, The surface of the sloping top is covered with a nitrided layer that has undergone nitriding treatment.

8. The inclined ejector structure for injection molds as described in claim 1, characterized in that, It also includes a positioning tube, which is fitted onto the other end of the ejector pin and is embedded in the B plate.

9. The inclined ejector structure for injection molds as described in claim 1, characterized in that, The ejector plate includes an ejector face plate and an ejector base plate. One end of the demolding ejector pin is inserted and fixed inside the ejector face plate, and the end face of one end of the demolding ejector pin is close to the ejector base plate.

10. The inclined ejector structure for injection molds as described in claim 1, characterized in that, One end of the reset ejector pin is pluggably fixed inside the front mold core, and the end face of one end of the reset ejector pin is in close contact with the A plate.

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