Cylindrical plastic part injection mold for vehicle

Abstract

The injection mold for the cylindrical plastic part for the vehicle comprises a bottom plate, a top plate, a push plate and an inclined top, a mold core groove matched with a mold core is formed in the push plate, and the upper end part of the mold core penetrates through the mold core groove and extends upwards; the inclined ejector comprises an inclined ejector head connected to the upper end of the mold core in an inclined sliding mode and an inclined ejector rod connected to the bottom of the inclined ejector head and extending downwards in the inclined direction, the extending direction of the inclined ejector rod is parallel to the sliding direction of the inclined ejector head, and the lower end of the inclined ejector rod penetrates through a mold core groove to be connected with a push plate. During mold closing, the upper end face of the angle ejector head is flush with the upper end face of the mold core, the outer wall of the angle ejector head protrudes out of the outer wall of the mold core located under the angle ejector head, and during mold opening, the push plate drives the angle ejector rod to obliquely move upwards, the upper end face of the angle ejector head protrudes out of the upper end face of the mold core, and the outer wall of the angle ejector head does not protrude out of the outer wall of the mold core located under the angle ejector head. The ejector pin can be driven by the push plate to eject a product, an ejector plate does not need to be additionally arranged, an injection molding machine table does not need to be changed, the cost of the injection mold is low, and the cost performance of the product is high.

Description

Technical Field

[0001] This utility model is located in the field of mold technology, and specifically relates to an injection mold for cylindrical plastic parts for automobiles. Background Technology

[0002] Besides metal components like the chassis and engine, automobiles also contain numerous plastic parts. These plastic parts come in various shapes and are mostly molded using injection molding. One type of cylindrical plastic part for automobiles is... Figure 1 and Figure 2 As shown, it includes a cylindrical body 1 and an inverted buckle 2 located on the inner wall of the cylindrical body 1. The inverted buckle 2 is formed by the indentation of the outer wall at the opening of the cylindrical body 1. When this cylindrical plastic part is injection molded, if conventional inclined ejector is used, two ejector plates (70mm thick) and an ejection space of 100mm in height are required, which makes the injection mold 170mm thicker overall, increasing the development cost of the injection mold. At the same time, the injection molding machine also needs to be increased from 320T to 560T, which increases the injection molding cost of the product. As a result, the cost performance of this cylindrical plastic part is generally poor, and it is difficult to further increase its market share. Utility Model Content

[0003] The purpose of this utility model is to solve one or more problems in the prior art and to provide an injection mold for cylindrical plastic parts for automobiles.

[0004] To achieve the above objectives, the technical solution provided by this utility model is a cylindrical plastic injection mold for automobiles, comprising:

[0005] Base plate, on which a mold core is connected;

[0006] A top plate, which is located above the bottom plate;

[0007] A push plate is movably disposed between the bottom plate and the top plate. The push plate has a mold core groove that matches the mold core. The upper end of the mold core passes through the mold core groove and extends upward, for forming the inner wall of the cylindrical plastic part for automobiles.

[0008] The automotive cylindrical plastic injection mold also includes an inclined ejector, which includes an inclined ejector head that can slide obliquely to the upper end of the mold core, and an inclined ejector rod that is connected to the bottom of the inclined ejector head and extends obliquely downward. The extension direction of the inclined ejector rod is parallel to the sliding direction of the inclined ejector head, and the lower end of the inclined ejector rod passes through the mold core groove and is connected to the push plate.

[0009] When the mold is closed, the upper end face of the inclined ejector head is flush with the upper end face of the mold core, and the outer wall of the inclined ejector head protrudes from the outer wall of the mold core located directly below the inclined ejector head, which is used to form the undercut of the inner wall of the cylinder. When the mold is opened, the push plate drives the inclined ejector rod to move upward and obliquely, so that the upper end face of the inclined ejector head protrudes from the upper end face of the mold core, and the outer wall of the inclined ejector head does not protrude from the outer wall of the mold core directly below the inclined ejector head.

[0010] Preferably, the upper end of the mold core is provided with an inclined ejector groove for sliding the inclined ejector, and the inclined ejector groove passes through the upper end face and one side of the mold core.

[0011] More preferably, the cross-section of the inclined ejector rod is rectangular, and the bottom wall of the inclined ejector head groove is provided with an inclined ejector rod hole for the inclined ejector rod to pass through, the inclined ejector rod hole penetrating the lower end face of the mold core.

[0012] More preferably, the groove wall of the inclined top is provided with a guide rail, and the side wall of the inclined top facing the guide rail is provided with a guide rail groove, and the guide rail is slidably embedded in the guide rail groove.

[0013] More preferably, the cross-section of the guide rail is convex, with the larger end of the convex shape facing the inclined top, the upper end of the guide rail groove being closed, and the lower end penetrating the bottom surface of the inclined top.

[0014] More preferably, the injection mold for automotive cylindrical plastic parts further includes a pick-up block, which is fixedly connected to the bottom surface of the push plate and connected to the lower end of the inclined push rod. The push plate drives the inclined push rod to move through the pick-up block.

[0015] More preferably, the pick has an extension end extending in a horizontal direction, and the lower end of the inclined push rod has a slot for inserting the extension end, which is inserted into the slot.

[0016] More preferably, the lower end of the mold core has a mating groove on its outer wall that communicates with the inclined ejector hole. The mating groove passes through the lower end face of the mold core, and the extension end is movably inserted into the mating groove.

[0017] More preferably, the base plate is provided with a clearance groove for avoiding the bottom of the pick block and the lower end of the inclined ejector rod. When the mold is closed, the extension end is located in the clearance groove and the extension end is located below the mold core.

[0018] More preferably, the slot is a through slot.

[0019] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0020] This utility model provides an injection mold for cylindrical plastic parts for automobiles, including a base plate, a top plate, a push plate, and an inclined ejector. The push plate has a mold core groove that matches the mold core, and the upper end of the mold core passes through the mold core groove and extends upward. The inclined ejector includes an inclined ejector head that can slide obliquely to the upper end of the mold core and an inclined ejector rod that extends downward obliquely to the bottom of the inclined ejector head. The extension direction of the inclined ejector rod is parallel to the sliding direction of the inclined ejector head, and its lower end passes through the mold core groove and connects to the push plate. When the mold is closed, the upper surface of the inclined ejector head is flush with the upper surface of the mold core, and the outer wall of the inclined ejector head protrudes from the outer wall of the mold core located directly below the inclined ejector head. When the mold is opened, the push plate drives the inclined ejector rod to move obliquely upward, so that the upper surface of the inclined ejector head protrudes from the upper surface of the mold core, and the outer wall of the inclined ejector head does not protrude from the outer wall of the mold core directly below the inclined ejector head. This design allows the product to be ejected by the inclined ejector driven by the push plate without the need for additional ejector plates or changes to the injection molding machine. The injection mold has low cost and the product has high cost performance. Attached Figure Description

[0021] Figure 1 , Figure 2 This is a three-dimensional schematic diagram of a cylindrical plastic part used in automobiles in the prior art.

[0022] Figure 3 The top view of the preferred embodiment of this utility model is shown in the diagram, with the top plate omitted for easier observation.

[0023] Figure 4 yes Figure 3 A cross-sectional view along the AA direction, showing the injection mold in the closed state.

[0024] Figure 5 yes Figure 3 A cross-sectional view along the AA direction, showing the injection mold in the open state.

[0025] Figure 6 yes Figure 4 A three-dimensional schematic diagram.

[0026] Figure 7 yes Figure 5 A three-dimensional schematic diagram.

[0027] Figure 8 yes Figure 7 A 3D schematic diagram with the cylindrical plastic parts for automobiles hidden.

[0028] Figure 9 yes Figure 8 A schematic diagram showing the assembly and disassembly of the core.

[0029] Figure 10 yes Figure 9 A schematic diagram after adjusting the view angle.

[0030] The components are: 1. cylinder; 2. undercut; 10. base plate; 11. mold core; 111. slanted ejector head groove; 112. guide rail; 113. slanted ejector rod hole; 114. mating groove; 12. clearance groove; 30. push plate; 31. mold core groove; 41. slanted ejector head; 411. guide rail groove; 42. slanted ejector rod; 421. slot; 50. picking block; 51. extension end. Detailed Implementation

[0031] like Figures 2 to 10 As shown, the injection mold for cylindrical plastic parts for automobiles provided by this utility model includes: a base plate 10, a top plate (not shown in the figure), a push plate 30, and an inclined ejector. A mold core 11 is connected to the base plate 10; the top plate is located above the base plate 10; the push plate 30 is movably disposed between the base plate 10 and the top plate, and a mold core groove 31 matching the mold core 11 is provided on the push plate 30. The upper end of the mold core 11 passes through the mold core groove 31 and extends upwards to form the inner wall of the cylindrical body 1 of the cylindrical plastic part for automobiles; the inclined ejector includes an inclined ejector head 41 that can slide obliquely to the upper end of the mold core 11, and an inclined ejector head 41 connected to the bottom of the inclined ejector head 41 and extending downwards. The extended inclined ejector rod 42 extends in a direction parallel to the sliding direction of the inclined ejector head 41. The lower end of the inclined ejector rod 42 passes through the mold core groove 31 and connects to the push plate 30. When the mold is closed, the upper end face of the inclined ejector head 41 is flush with the upper end face of the mold core 11. The outer wall of the inclined ejector head 41 protrudes from the outer wall of the mold core 11 located directly below the inclined ejector head 41, which is used to form the undercut 2 of the inner wall of the cylinder 1. When the mold is opened, the push plate 30 drives the inclined ejector rod 42 to move upward and obliquely, so that the upper end face of the inclined ejector head 41 protrudes from the upper end face of the mold core 11, and the outer wall of the inclined ejector head 41 does not protrude from the outer wall of the mold core 11 directly below the inclined ejector head 41, which facilitates material unloading.

[0032] The advantage of this setup is that it can push the product out through the push plate and the inclined ejector, allowing the product to be easily demolded by inverting, without the need to add an extra ejector plate or change the injection molding machine. This results in low injection mold cost and high cost-effectiveness of the product (this cylindrical plastic part for automobiles).

[0033] To facilitate the sliding of the inclined ejector 41, in this embodiment, the upper end of the mold core 11 is provided with an inclined ejector groove 111 for the inclined ejector 41 to slide. The inclined ejector groove 111 penetrates the upper end face and one side of the mold core 11. Furthermore, the groove wall of the inclined ejector groove 111 is provided with a guide rail 112, and the side wall of the inclined ejector 41 facing the guide rail 112 is provided with a guide rail groove 411. The guide rail 112 can be slidably embedded in the guide rail groove 411. To prevent the inclined ejector 41 from detaching from the mold core 11 and to limit the sliding of the inclined ejector 41, the cross-section of the guide rail 112 is convex, and the larger end of the convex shape faces the inclined ejector 41. The upper end of the guide rail groove 411 is closed, and the lower end penetrates the bottom surface of the inclined ejector 41.

[0034] To prevent the inclined ejector head 41 from wobbling during sliding, in this embodiment, the cross-section of the inclined ejector rod 42 is rectangular, and the bottom wall of the inclined ejector head groove 111 is provided with an inclined ejector rod hole 113 for the inclined ejector rod 42 to pass through. The inclined ejector rod hole 113 penetrates the lower end face of the mold core 11.

[0035] To facilitate the connection between the inclined ejector rod 42 and the push plate 30, the automotive cylindrical plastic injection mold also includes a pick block 50. The pick block 50 is fixedly connected to the bottom surface of the push plate 30 and connected to the lower end of the inclined ejector rod 42. The push plate 30 drives the inclined ejector rod 42 to move obliquely up and down through the pick block 50. Specifically, the pick block 50 has an extension end 51 extending in the horizontal direction. The lower end of the inclined ejector rod 42 is provided with a slot 421 for inserting the extension end 51. The slot 421 is a through slot. The extension end 51 can be slidably inserted (embedded) in the slot 421. At the same time, the lower end of the mold core 11 has a mating groove 114 that communicates with the inclined ejector rod hole 113. The mating groove 114 penetrates the lower end face of the mold core 11. The extension end 51 can move up and down through the mating groove 114.

[0036] For ease of setup, the base plate 10 is further provided with a clearance groove 12 for avoiding the bottom of the ejector block 50 and the lower end of the inclined ejector rod 41. When the mold is closed, the extension end 51 is located in the clearance groove 12 and the extension end 51 is located below the mold core 11.

[0037] This cylindrical plastic injection mold for automobiles can eliminate the need for two ejector plates (70mm thick) and 100mm ejection space, reducing mold development costs. At the same time, the injection molding machine can be reduced from 560T to 320T, reducing the injection molding cost of the product.

[0038] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the protection scope of this utility model.

Claims

1. An injection mold for a cylindrical plastic part used in automobiles, comprising: Base plate, on which a mold core is connected; A top plate, which is located above the bottom plate; A push plate is movably disposed between the bottom plate and the top plate. The push plate has a mold core groove that matches the mold core. The upper end of the mold core passes through the mold core groove and extends upward, for forming the inner wall of the cylindrical plastic part for automobiles. Its features are: The automotive cylindrical plastic injection mold also includes an inclined ejector, which includes an inclined ejector head that can slide obliquely to the upper end of the mold core, and an inclined ejector rod that is connected to the bottom of the inclined ejector head and extends obliquely downward. The extension direction of the inclined ejector rod is parallel to the sliding direction of the inclined ejector head, and the lower end of the inclined ejector rod passes through the mold core groove and is connected to the push plate. When the mold is closed, the upper end face of the inclined ejector head is flush with the upper end face of the mold core, and the outer wall of the inclined ejector head protrudes from the outer wall of the mold core located directly below the inclined ejector head, which is used to form the undercut of the inner wall of the cylinder. When the mold is opened, the push plate drives the inclined ejector rod to move upward and obliquely, so that the upper end face of the inclined ejector head protrudes from the upper end face of the mold core, and the outer wall of the inclined ejector head does not protrude from the outer wall of the mold core directly below the inclined ejector head.

2. The injection mold for automotive cylindrical plastic parts according to claim 1, characterized in that: The upper end of the mold core is provided with an inclined ejector groove for the inclined ejector to slide through the upper end face and one side of the mold core.

3. The injection mold for automotive cylindrical plastic parts according to claim 2, characterized in that: The cross-section of the inclined ejector is rectangular, and the bottom wall of the inclined ejector groove is provided with an inclined ejector hole for the inclined ejector to pass through, the inclined ejector hole penetrating the lower end face of the mold core.

4. The injection mold for automotive cylindrical plastic parts according to claim 2, characterized in that: The inclined mandrel has a guide rail on its groove wall, and the inclined mandrel has a guide rail groove on its side wall facing the guide rail. The guide rail is slidably embedded in the guide rail groove.

5. The injection mold for automotive cylindrical plastic parts according to claim 4, characterized in that: The guide rail has a convex cross-section, with the larger end of the convex shape facing the inclined top. The upper end of the guide rail groove is closed, and the lower end penetrates the bottom surface of the inclined top.

6. The injection mold for automotive cylindrical plastic parts according to claim 3, characterized in that: The automotive cylindrical plastic injection mold also includes a pick-up block, which is fixedly connected to the bottom surface of the push plate and connected to the lower end of the inclined push rod. The push plate drives the inclined push rod to move through the pick-up block.

7. The injection mold for automotive cylindrical plastic parts according to claim 6, characterized in that: The pick has an extension end that extends horizontally, and the lower end of the inclined push rod has a slot for inserting the extension end, which is inserted into the slot.

8. The injection mold for automotive cylindrical plastic parts according to claim 7, characterized in that: The lower end of the mold core has a mating groove on its outer wall that communicates with the inclined ejector hole. The mating groove passes through the lower end face of the mold core, and the extension end is movably inserted into the mating groove.

9. The injection mold for automotive cylindrical plastic parts according to claim 7, characterized in that: The base plate is provided with a clearance groove for avoiding the bottom of the lifting block and the lower end of the inclined ejector rod. When the mold is closed, the extension end is located in the clearance groove and the extension end is located below the mold core.

10. The injection mold for automotive cylindrical plastic parts according to claim 7, characterized in that: The slot is a through slot.

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