Built-in pitched roof demolding mechanism for pitched roof of automobile bumper

Abstract

The utility model belongs to the technical field of molds, and relates to a built-in pitched roof demolding mechanism of an automobile bumper pitched roof. The automobile bumper forming die comprises an automobile bumper forming lower die and an automobile bumper forming upper die, a forming insert panel is arranged between the automobile bumper forming lower die and the automobile bumper forming upper die, a forming protrusion is arranged on the forming insert panel, a forming concave cavity is formed in the automobile bumper forming upper die, and the automobile bumper forming lower die and the automobile bumper forming upper die are arranged in the forming concave cavity. The forming protrusions correspond to the forming concave cavities in position and are matched with the forming concave cavities in shape, and an ejection fixing plate is arranged below the automobile bumper forming lower die. In the using process, through cooperation of the built-in inclined top demolding assembly and the inclined and straight top combined demolding piece, cooperation of multiple components, combination of multiple demolding modes and reasonable staggered layout are achieved, the complex structure of an automobile bumper can be perfectly coped with, demolding damage is avoided, the product size precision and surface quality are greatly improved, and the product quality is improved. The demolding quality is high.

Description

Technical Field

[0001] This utility model belongs to the field of mold technology and relates to a built-in inclined ejector mechanism for the inclined ejector of an automobile bumper. Background Technology

[0002] In the injection molding process of automotive bumpers, the demolding process is crucial. Traditional demolding mechanisms often encounter difficulties when dealing with the complex shapes of automotive bumpers. For example, the undercut areas of the product may not be able to detach smoothly from the mold, leading to product deformation, tearing, or even damage during demolding. Moreover, traditional methods are inefficient, requiring a significant amount of time for demolding operations, severely impacting production schedules, and resulting in inconsistent product quality due to demolding problems. Therefore, there is an urgent need to design a highly efficient and stable demolding mechanism with an integrated inclined ejector that can adapt to complex-shaped automotive bumpers.

[0003] To overcome the shortcomings of existing technologies, people have continuously explored and proposed various solutions. For example, a Chinese patent discloses an automobile bumper mold [application number: 201611146188.6], which includes a moving mold plate group and a fixed mold plate group. The fixed mold plate group includes a push plate, a fixed mold plate, a hot runner frame plate, and a fixed mold base plate arranged from bottom to top. The moving mold plate group includes a moving mold plate, a moving mold base plate, and push rods, nitrogen springs, ejector pin connecting pipes, and support columns arranged on it. A first slider is provided at the left connection point between the fixed mold plate and the moving mold plate, and a hydraulic cylinder is provided at the right connection point between the fixed mold plate and the moving mold base plate. A square guide post is provided above the hydraulic cylinder, and the hydraulic cylinder drives a second slider. A limit post is provided on the right side of the nitrogen spring, and a push rod is provided on the left side of the nitrogen spring. However, during the ejection and demolding process, this solution is prone to jamming and demolding difficulties when facing complex areas of the bumper, such as the undercut area of ​​the product. It also has the defect that the product is prone to deformation and tearing during the demolding process. Utility Model Content

[0004] The purpose of this invention is to address the above-mentioned problems by providing a built-in inclined ejector mechanism for the inclined ejector of an automotive bumper.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A built-in inclined ejector demolding mechanism for a car bumper includes a lower mold and an upper mold. A molding insert is provided between the lower and upper molds, and the molding insert has molding protrusions. A molding cavity is provided inside the upper mold. The molding protrusions and the molding cavity are positioned and matched in shape. An ejector fixing plate is provided below the lower mold, and an inclined and straight ejector combined demolding component is provided inside the ejector fixing plate. A built-in inclined ejector demolding assembly is provided inside the molding insert, and the built-in inclined ejector demolding assembly and the inclined and straight ejector combined demolding component are staggered.

[0007] In the aforementioned car bumper sloping top built-in sloping top demolding mechanism, the built-in sloping top demolding component includes two built-in sloping top rods disposed within the molding insert. The heads of the built-in sloping top rods are provided with built-in sloping top auxiliary molding blocks, and the shape of the built-in sloping top auxiliary molding blocks is adapted to the shape of the molding protrusion.

[0008] In the aforementioned car bumper inclined top built-in inclined top demolding mechanism, the molding panel is provided with two linear actuators, and the power shaft of the linear actuators is connected to the built-in inclined top rod.

[0009] In the aforementioned car bumper inclined top built-in inclined top demolding mechanism, the built-in inclined top rod and the inclined straight top combined demolding component are arranged alternately.

[0010] In the aforementioned car bumper inclined ejector built-in inclined ejector demolding mechanism, the inclined and straight ejector combined demolding component includes a straight ejector and an inclined ejector disposed within the ejection fixing plate, and the built-in inclined ejector, straight ejector and inclined ejector are arranged alternately.

[0011] In the aforementioned car bumper angled top built-in angled top demolding mechanism, the straight ejector includes a plurality of straight ejector rods disposed in the ejection fixing plate, and the top of the straight ejector rod is provided with a first embedded auxiliary forming block, the first embedded auxiliary forming block being adapted to the shape of the forming protrusion.

[0012] In the aforementioned car bumper sloping top built-in sloping top demolding mechanism, the sloping top component includes a long sloping top rod disposed in the ejection fixing plate, and the top of the long sloping top rod is provided with a second embedded auxiliary forming block, the second embedded auxiliary forming block being adapted to the shape of the forming protrusion.

[0013] In the aforementioned car bumper inclined ejector built-in inclined ejector demolding mechanism, the ejector fixing plate is provided with an inclined ejector connector, and the bottom of the long inclined ejector rod is slidably engaged with the inclined ejector connector.

[0014] In the aforementioned car bumper inclined ejector built-in inclined ejector demolding mechanism, the inclined ejector connector includes a sliding connecting seat disposed on the ejector fixing plate, and the bottom of the long inclined ejector rod is provided with a slider extending into the sliding connecting seat, and the slider is slidably engaged with the sliding connecting seat.

[0015] In the aforementioned car bumper inclined ejector built-in inclined ejector demolding mechanism, the ejector fixing plate is provided with a limiting shaft, and the limiting shaft is in sliding fit with the lower mold of the car bumper forming.

[0016] Compared with existing technologies, the advantages of this utility model are:

[0017] 1. In use, this utility model achieves multi-component collaboration, multiple demolding methods combined, and a reasonable staggered layout through the cooperation between the built-in inclined ejector demolding component and the inclined straight ejector combined demolding component. It can perfectly cope with the complex structure of car bumpers, avoid demolding damage, greatly improve the product's dimensional accuracy and surface quality, and achieve high demolding quality.

[0018] 2. This utility model has a compact and reasonable structure, high space utilization, and can reduce the mold volume, reduce the amount of mold material used, and reduce manufacturing and maintenance costs.

[0019] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model.

[0021] Figure 2 This is a partial structural schematic diagram of the present invention.

[0022] Figure 3 This is a partial structural schematic diagram of another aspect of this utility model.

[0023] Figure 4 This is a schematic diagram of the upper mold for forming car bumpers.

[0024] In the diagram: 1. Lower mold for car bumper forming; 2. Upper mold for car bumper forming; 3. Molding insert; 4. Molding protrusion; 5. Molding cavity; 6. Ejector fixing plate; 7. Inclined and straight ejector combined demolding component; 8. Built-in inclined ejector demolding assembly; 9. Built-in inclined ejector rod; 10. Linear driver; 11. Straight ejector; 12. Inclined ejector; 13. Straight ejector rod; 14. First embedded auxiliary molding block; 15. Long inclined ejector rod; 16. Second embedded auxiliary molding block; 17. Inclined ejector connector; 18. Sliding connector seat; 19. Slider; 20. Limiting shaft; 21. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings.

[0026] like Figure 1-4As shown, a car bumper with a built-in angled ejector demolding mechanism includes a lower mold 1 and an upper mold 2 for forming the car bumper. A molding insert 3 is provided between the lower mold 1 and the upper mold 2. A molding protrusion 4 is provided on the molding insert 3. A molding cavity 5 is provided inside the upper mold 2. The molding protrusion 4 and the molding cavity 5 are positioned and matched in shape. An ejector fixing plate 6 is provided below the lower mold 1. An angled and straight ejector combined demolding component 7 is provided inside the ejector fixing plate 6. An internal angled ejector demolding assembly 8 is provided inside the molding insert 3. The internal angled ejector demolding assembly 8 and the angled and straight ejector combined demolding component 7 are arranged alternately.

[0027] In this embodiment, during mold closing, the molding protrusion 4 is embedded into the molding cavity 5 to create the molding space of the car bumper. An ejector fixing plate 6 is provided below the lower mold 1 of the car bumper, and a combined inclined and straight ejector mold release component 7 is installed inside it. At the same time, the molding insert 3 is provided with a built-in inclined ejector mold release component 8. The two are distributed alternately. After injection molding, the combined inclined and straight ejector mold release component 7 is ejected from below, and the built-in inclined ejector mold release component 8 moves from a specific position inside. This staggered cooperation avoids demolding interference and acts on the car bumper from all directions to ensure smooth demolding of all parts and ensure product integrity.

[0028] Combination Figure 1-4 As shown, the built-in inclined ejector assembly 8 includes two built-in inclined ejector rods 9 disposed in the molding insert 3. The head of the built-in inclined ejector rod 9 is provided with a built-in inclined ejector auxiliary molding block 10, and the shape of the built-in inclined ejector auxiliary molding block 10 is adapted to the molding protrusion 4.

[0029] Specifically, during the injection molding stage, the built-in inclined ejector auxiliary molding block 10 and the molding protrusion 4 work together to shape specific internal structures of the car bumper, such as areas with undercuts or irregular shapes. During demolding, the built-in inclined ejector rod 9 drives the built-in inclined ejector auxiliary molding block 10 to move, separating it from the product. This precisely solves the demolding problem of complex internal structures, ensuring the integrity of the product's internal structure and preventing damage during demolding.

[0030] The molded panel 3 is provided with two linear actuators 11, and the power shaft of the linear actuator 11 is connected to the built-in inclined push rod 9.

[0031] In this embodiment, the linear actuator 11 serves as a power source, providing stable power to the built-in inclined ejector rod 9. When the linear actuator 11 is activated, the power shaft drives the built-in inclined ejector rod 9 to move in a predetermined direction and stroke, thereby realizing the precise demolding action of the built-in inclined ejector auxiliary molding block 10 and ensuring that the demolding process is controllable and stable.

[0032] Combination Figure 2 , Figure 3 As shown, the built-in inclined ejector rod 9 and the inclined straight ejector combined demolding component 7 are arranged alternately.

[0033] In this embodiment, the built-in angled ejector rod 9 and the angled straight ejector combined demolding component 7 are arranged alternately. This layout allows the two to work together without interfering with each other during demolding, each acting on different areas of the car bumper. The built-in angled ejector rod 9 focuses on demolding the internal complex structure, while the angled straight ejector combined demolding component 7 is responsible for other parts. Working together, they improve demolding efficiency and quality.

[0034] The inclined and straight ejector combined demolding component 7 includes a straight ejector 12 and an inclined ejector 13 disposed within the ejection fixing plate 6, and the built-in inclined ejector rod 9, the straight ejector 12 and the inclined ejector 13 are arranged alternately.

[0035] In this embodiment, the straight ejector 12 is used to eject the relatively flat parts of the product that are easy to demold vertically; the angled ejector 13 is used for areas with a certain tilt angle or special shape that require angled demolding; the built-in angled ejector rod 9 handles the complex internal structure. The three have clear division of labor and cooperate with each other to fully cover the demolding needs of car bumpers and improve the demolding effect.

[0036] Combination Figure 3 As shown, the straight push member 12 includes a plurality of straight push rods 14 disposed in the push-out fixing plate 6. The top of the straight push rod 14 is provided with a first embedded auxiliary forming block 15, and the shape of the first embedded auxiliary forming block 15 is adapted to the forming protrusion 4.

[0037] In this embodiment, when the mold is closed, the first embedded auxiliary molding block 15 participates in product molding; when the mold is demolded, the straight ejector rod 14 moves upward, and the first embedded auxiliary molding block 15 pushes the corresponding part of the product to achieve smooth demolding in the vertical direction, ensuring that the product surface is flat and there are no ejection marks.

[0038] The inclined ejector 13 includes a long inclined ejector rod 16 disposed in the ejector fixing plate 6. The top of the long inclined ejector rod 16 is provided with a second embedded auxiliary forming block 17, which is adapted to the shape of the forming protrusion 4.

[0039] In this embodiment, an inclined ejector connector 18 is provided on the ejector fixing plate 6, and the bottom of the long inclined ejector rod 16 slides in cooperation with the inclined ejector connector 18. During demolding, as the ejector fixing plate 6 rises, the long inclined ejector rod 16 moves obliquely under the guidance of the inclined ejector connector 18, and the second embedded auxiliary molding block 17 pushes a specific part of the product to achieve oblique demolding and solve the demolding problem of special shape areas of the product.

[0040] Combination Figure 1-4As shown, the ejector fixing plate 6 is provided with an inclined ejector connector 18, the bottom of the long inclined ejector rod 16 is slidably engaged with the inclined ejector connector 18, the inclined ejector connector 18 includes a sliding connecting seat 19 provided on the ejector fixing plate 6, the bottom of the long inclined ejector rod 16 is provided with a slider 20 extending into the sliding connecting seat 19, and the slider 20 is slidably engaged with the sliding connecting seat 19.

[0041] In this embodiment, the slider 20 slides smoothly within the sliding connecting seat 19, providing stable support and guidance for the long inclined ejector rod 16, ensuring the accuracy and stability of the inclined movement of the long inclined ejector rod 16, and ensuring smooth demolding of the inclined ejector.

[0042] Combination Figure 1-3 As shown, the ejector fixing plate 6 is provided with a limiting shaft 21, which is in sliding cooperation with the lower mold 1 for forming the car bumper.

[0043] In this embodiment, during the demolding process, the limiting shaft 21 restricts the movement stroke of the ejector fixing plate 6 to prevent excessive ejection from causing mold damage or product deformation, thus ensuring a safe and stable demolding process.

[0044] The working principle of this utility model is as follows:

[0045] During production, the raw materials for the car bumper are first injected into the mold cavity, which consists of the lower mold 1, the upper mold 2, and the molding panel 3. After injection molding, the bumper enters the demolding process.

[0046] First, the linear actuator 11 is activated, and the power shaft pushes the built-in angled ejector rod 9, causing the built-in angled ejector auxiliary molding block 10 to detach from a specific structure inside the car bumper, thus completing the demolding of the built-in angled ejector.

[0047] Simultaneously, the ejector plate 6 rises under the action of external power (such as hydraulic cylinder or pneumatic cylinder), and the straight ejector rod 14 rises with the ejector plate 6. The first embedded auxiliary forming block 15 pushes the corresponding part of the product to be directly ejected from the mold. The bottom slider 20 of the long inclined ejector rod 16 slides in the sliding connecting seat 19, and the long inclined ejector rod 16 is ejected at an angle. The second embedded auxiliary forming block 17 pushes the specific part of the product to be ejected at an angle. Throughout the process, the limiting shaft 21 slides in the lower mold 1 of the car bumper forming, precisely limiting the movement position of the ejector plate 6, ensuring accurate and stable demolding.

[0048] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model.

[0049] Although this document frequently uses terms such as 1. lower mold for forming car bumpers, 2. upper mold for forming car bumpers, 3. molding insert, 4. molding protrusion, 5. molding cavity, 6. ejector fixing plate, 7. inclined and straight ejector combined demolding component, 8. built-in inclined ejector demolding assembly, 9. built-in inclined ejector rod, 10. built-in inclined ejector auxiliary forming block, 11. linear actuator, 12. straight ejector, 13. inclined ejector, 14. straight ejector rod, 15. first embedded auxiliary forming block, 16. long inclined ejector rod, 17. second embedded auxiliary forming block, 18. inclined ejector connector, 19. sliding connector, 20. slider, and 21 limiting shaft, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A built-in inclined top demolding mechanism of an automobile bumper inclined top, comprising an automobile bumper forming lower die (1) and an automobile bumper forming upper die (2), characterized in that, The automobile bumper forming lower die (1) and automobile bumper forming upper die (2) are provided with a forming panel (3), the forming panel (3) is provided with a forming protrusion (4), the automobile bumper forming upper die (2) is provided with a forming cavity (5), the forming protrusion (4) and the forming cavity (5) correspond in position and match in shape, the automobile bumper forming lower die (1) is provided with an ejection fixed plate (6) below, the ejection fixed plate (6) is provided with an oblique straight top combined demoulding element (7) inside, the forming panel (3) is provided with an embedded oblique top demoulding assembly (8), and the embedded oblique top demoulding assembly (8) is staggered with the oblique straight top combined demoulding element (7).

2. The automobile bumper racking inner built-in racking demolding mechanism according to claim 1, characterized in that, The embedded oblique top demoulding assembly (8) comprises two embedded oblique top rods (9) arranged in the forming panel (3), and the embedded oblique top rods (9) are provided with embedded oblique top auxiliary forming blocks (10) at the heads.

3. The automobile bumper racking inner built-in racking demolding mechanism according to claim 2, characterized in that, The forming panel (3) is provided with two linear drives (11), and the power shafts of the linear drives (11) are connected with the embedded oblique top rods (9).

4. The automobile bumper racking inner built-in racking demolding mechanism according to claim 3, characterized in that, The embedded oblique top rods (9) are staggered with the oblique straight top combined demoulding element (7).

5. The automobile bumper racking inner built-in racking demolding mechanism according to claim 4, characterized in that, The oblique straight top combined demoulding element (7) comprises a straight top element (12) and an oblique top element (13) arranged in the ejection fixed plate (6), and the embedded oblique top rods (9), the straight top element (12) and the oblique top element (13) are staggered.

6. The automobile bumper racking inner built-in racking demolding mechanism according to claim 5, characterized in that, The straight top element (12) comprises a plurality of straight top rods (14) arranged in the ejection fixed plate (6), and the straight top rods (14) are provided with first embedded auxiliary forming blocks (15) at the top portions.

7. The automotive bumper ratcheting inner built-in ratcheting ejection mechanism of claim 6, wherein, The oblique top element (13) comprises a long oblique top rod (16) arranged in the ejection fixed plate (6), and the long oblique top rod (16) is provided with a second embedded auxiliary forming block (17) at the top portion.

8. The automotive bumper ratcheting inner built-in ratcheting ejection mechanism of claim 7, wherein, The ejection fixed plate (6) is provided with an oblique top connecting element (18), and the bottom portion of the long oblique top rod (16) is in sliding fit with the oblique top connecting element (18).

9. The automotive bumper ratcheting inner built-in ratcheting ejection mechanism of claim 8, wherein, The oblique top connecting element (18) comprises a sliding connection seat (19) arranged on the ejection fixed plate (6), the bottom portion of the long oblique top rod (16) is provided with a sliding block (20) extending into the sliding connection seat (19), and the sliding block (20) is in sliding fit with the sliding connection seat (19).

10. The automotive bumper ratcheting inner built-in ratcheting ejection mechanism of claim 9, wherein, The ejection fixed plate (6) is provided with a limiting shaft (21), and the limiting shaft (21) is in sliding fit with the automobile bumper forming lower die (1).

Images