Self-locking type oil cylinder core-pulling mechanism of automotive upholstery injection mold

Abstract

The utility model belongs to the technical field of molds, and relates to a self-locking oil cylinder core-pulling mechanism of an injection mold for automotive upholstery. The automobile interior trim part forming die comprises an automobile interior trim part forming lower die and an automobile interior trim part forming upper die, an injection molding flow dividing part is arranged above the automobile interior trim part forming upper die, an interior trim part forming convex part is arranged in the automobile interior trim part forming lower die, an interior trim part forming concave part is arranged in the automobile interior trim part forming upper die, and the automobile interior trim part forming concave part is arranged in the automobile interior trim part forming lower die. The interior trim part forming convex part and the interior trim part forming concave part correspond to each other in position and are matched with each other in shape, and a core-pulling fixing plate is arranged below the automobile interior trim part forming lower die. In the use process, the inclined core-pulling rod and the straight core-pulling rod in the combined core-pulling structure can be synchronously driven through the self-locking oil cylinder driving structure, so that the collaborative operation of inclined core-pulling and longitudinal core-pulling is realized, the core-pulling requirements of complex structures of automotive upholstery are met, and the core-pulling efficiency and the forming precision are improved.

Description

Technical Field

[0001] This utility model belongs to the field of mold technology and relates to a self-locking hydraulic cylinder core-pulling mechanism for injection molds of automotive interior parts. Background Technology

[0002] In the injection molding production of automotive interior parts, for interior parts with complex structures such as grooves and bosses, a core-pulling mechanism is needed to extract the core from the mold for easy demolding. Traditional core-pulling mechanisms mostly use a single core-pulling method, such as simple angled or straight-ejector core-pulling, which is difficult to meet the multi-angle core-pulling requirements of complex interior parts. Some combined core-pulling mechanisms use mechanical linkage or multiple independent drive sources, but these suffer from complex structures, poor synchronization, and low core-pulling accuracy. In addition, during the injection molding process, due to the high pressure of the molten material, the core-pulling mechanism is prone to angular and positional displacement, leading to decreased dimensional accuracy of the interior parts, surface defects, and even mold damage. Therefore, there is an urgent need for a core-pulling mechanism that can achieve synchronous multi-directional core-pulling and has a reliable self-locking function, in order to improve the injection molding quality and production efficiency of automotive interior parts, specifically a self-locking hydraulic cylinder core-pulling mechanism for automotive interior part injection molds.

[0003] To overcome the shortcomings of existing technologies, people have continuously explored and proposed various solutions. For example, a Chinese patent discloses an injection mold for automotive interior parts [Application No.: 202010525284.1], which includes a mounting base. A mounting bracket, shaped like an inverted U, is mounted on the upper end of the mounting base. An electric push rod is mounted on the upper end of the mounting bracket. A lower mold body is embedded in the upper end of the mounting base. An upper mold body, which mates with the lower mold body, is located above the mounting base. The telescopic end of the electric push rod passes through the mounting bracket and is fixedly connected to the upper end of the upper mold body. Two symmetrical sliding grooves are provided on the upper end of the mounting base, and a guide mechanism for guiding the upper mold body is provided within both sliding grooves. An injection port for injection is opened at the upper end of the upper mold body. Two symmetrical transverse grooves are provided inside the mounting base, and each transverse groove communicates with one of the two sliding grooves. However, due to the high pressure of the molten material during injection molding, the core-pulling mechanism is still prone to angular and positional shifts, leading to decreased dimensional accuracy of the interior parts, surface defects, and even mold damage. Utility Model Content

[0004] The purpose of this invention is to address the above-mentioned problems by providing a self-locking hydraulic cylinder core-pulling mechanism for injection molds of automotive interior parts.

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

[0006] A self-locking hydraulic cylinder core-pulling mechanism for an injection mold of automotive interior parts includes a lower mold and an upper mold. An injection diverter is located above the upper mold. The lower mold has a molding protrusion, and the upper mold has a molding recess. The protrusion and recess are positioned and shaped accordingly. A core-pulling fixing plate is located below the lower mold, and a combined core-pulling structure is provided on the fixing plate. A self-locking hydraulic cylinder drive structure is located between the lower mold and the fixing plate.

[0007] In the above-mentioned self-locking hydraulic cylinder core-pulling mechanism for automotive interior parts injection molds, the self-locking hydraulic cylinder drive structure includes a limiting anti-deviation plate disposed between the lower mold of the automotive interior parts molding and the core-pulling fixing plate. Four hydraulic cylinders are provided above the limiting anti-deviation plate, and the power shaft of the hydraulic cylinders is provided with a connecting piece that is engaged with the core-pulling fixing plate.

[0008] In the aforementioned self-locking hydraulic cylinder core-pulling mechanism for automotive interior parts injection molds, the connecting component includes a connecting clip disposed on the power shaft of the hydraulic cylinder, and the core-pulling fixing plate has four clip slots, with the connecting clip engaging with the clip slots.

[0009] In the aforementioned self-locking hydraulic cylinder core-pulling mechanism for automotive interior parts injection molds, the bottom of the limiting anti-deviation plate is provided with a clamping head alignment groove, and the connecting clamping head slides into the clamping head alignment groove.

[0010] In the aforementioned self-locking hydraulic cylinder core-pulling mechanism for automotive interior parts injection molds, the combined core-pulling structure includes an inclined core-pulling rod and a straight core-pulling rod disposed on a core-pulling fixing plate. An auxiliary molding block is provided at the top of the inclined core-pulling rod, and the inclined core-pulling rod and the straight core-pulling rod are arranged alternately.

[0011] In the aforementioned self-locking hydraulic cylinder core-pulling mechanism for automotive interior parts injection molds, a slide block is provided on the core-pulling fixing plate, and the bottom of the inclined core-pulling rod slides in cooperation with the slide block.

[0012] In the aforementioned self-locking hydraulic cylinder core-pulling mechanism for automotive interior parts injection molds, the straight core-pulling rod slides in conjunction with the limiting anti-deviation plate, the limiting anti-deviation plate has a limiting groove, and the inclined core-pulling rod passes through the limiting groove and slides in conjunction with the limiting groove.

[0013] In the aforementioned self-locking hydraulic cylinder core-pulling mechanism for automotive interior parts injection molds, the lower mold for forming automotive interior parts is provided with an injection channel, and the straight core-pulling rod is positioned directly opposite the injection channel.

[0014] In the aforementioned self-locking hydraulic cylinder core-pulling mechanism for automotive interior parts injection molds, the injection diversion component includes an injection main board disposed above the upper mold for molding automotive interior parts, and a diversion plate is provided below the injection main board.

[0015] In the aforementioned self-locking hydraulic cylinder core-pulling mechanism for automotive interior parts injection molds, the bottom of the manifold is provided with several injection tubes.

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

[0017] 1. In use, this utility model can synchronously drive the inclined core-pulling rod and the straight core-pulling rod in the combined core-pulling structure through the self-locking hydraulic cylinder drive structure, so as to realize the coordinated operation of inclined core pulling and longitudinal core pulling, meet the core pulling requirements of complex automotive interior parts, and improve core pulling efficiency and molding accuracy.

[0018] 2. This utility model utilizes the snap-fit ​​between the oil cylinder and the core-pulling fixing plate to achieve self-locking of the combined core-pulling structure, effectively preventing angular and positional displacement of the inclined and straight core-pulling rods during injection molding, thus ensuring mold stability and the molding quality of interior parts.

[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 partial structural schematic diagram of another aspect of this utility model.

[0024] In the diagram: 1. Lower mold for automotive interior parts; 2. Upper mold for automotive interior parts; 3. Injection manifold; 4. Molding protrusion for interior parts; 6. Core-pulling fixing plate; 7. Combined core-pulling structure; 8. Self-locking hydraulic cylinder drive structure; 9. Limiting and anti-deviation plate; 10. Hydraulic cylinder; 11. Connecting part; 12. Connecting clip; 13. Clip slot; 14. Clip alignment slot; 15. Angled core-pulling rod; 16. Straight core-pulling rod; 17. Auxiliary molding block; 18. Slide seat; 19. Limiting slide groove; 20. Injection channel; 21. Injection main board; 22. Manifold; 23. Injection tube. Detailed Implementation

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

[0026] like Figure 1-4 As shown, a self-locking hydraulic cylinder core-pulling mechanism for an automotive interior part injection mold includes a lower mold 1 and an upper mold 2 for automotive interior parts. An injection diverter 3 is provided above the upper mold 2. An interior part forming protrusion 4 is provided inside the lower mold 1, and an interior part forming recess is provided inside the upper mold 2. The protrusion 4 and the recess are positioned and shaped accordingly. A core-pulling fixing plate 6 is provided below the lower mold 1, and a combined core-pulling structure 7 is provided on the fixing plate 6. A self-locking hydraulic cylinder drive structure 8 is provided between the lower mold 1 and the fixing plate 6.

[0027] In this embodiment, during the injection molding process, the upper mold 2 and the lower mold 1 close to form a closed cavity. The injection molding flow divider 3 evenly injects the molten material into the mold cavity. During core pulling, the self-locking hydraulic cylinder drive structure 8 drives the core pulling fixing plate 6 to move down, and synchronously drives the combined core pulling structure 7 to complete demolding. The self-locking hydraulic cylinder drive structure can synchronously drive the inclined core pulling rod and the straight core pulling rod in the combined core pulling structure, realizing the coordinated operation of inclined core pulling and longitudinal core pulling, meeting the core pulling requirements of complex automotive interior parts, and improving core pulling efficiency and molding accuracy.

[0028] Combination Figure 1-4 As shown, the self-locking hydraulic cylinder drive structure 8 includes a limiting anti-deviation plate 9 disposed between the lower mold 1 for forming automotive interior parts and the core-pulling fixing plate 6. Four hydraulic cylinders 10 are disposed above the limiting anti-deviation plate 9. A connecting member 11 is disposed on the power shaft of the hydraulic cylinder 10 and engages with the core-pulling fixing plate 6. The connecting member 11 includes a connecting head 12 disposed on the power shaft of the hydraulic cylinder 10. The core-pulling fixing plate 6 has four head slots 13. The connecting head 12 engages with the head slots 13. The bottom of the limiting anti-deviation plate 9 is provided with a head alignment groove 14. The connecting head 12 slides with the head alignment groove 14.

[0029] In this embodiment, the connector 11 includes a connecting clamp 12 disposed on the power shaft of the hydraulic cylinder 10. The core-pulling fixing plate 6 has four clamp slots 13, and the connecting clamp 12 engages with the clamp slots 13. The bottom of the limiting anti-deviation plate 9 is provided with a clamp alignment groove 14, and the connecting clamp 12 slides with the clamp alignment groove 14. When the hydraulic cylinder 10 works, the power shaft drives the connecting clamp 12 to slide in the clamp alignment groove 14 and engage with the clamp slots 13, thereby driving the core-pulling fixing plate 6 and the combined core-pulling structure 7 to move. During the injection molding process, the hydraulic cylinder 10 maintains pressure, and the connecting clamp 12 is tightly engaged with the clamp slots 13, realizing the self-locking of the combined core-pulling structure 7. This achieves stable driving and reliable self-locking of the core-pulling fixing plate 6 by the hydraulic cylinder 10, preventing the core-pulling structure from shifting under injection pressure. The clamp alignment groove 14 of the limiting anti-deviation plate 9 guides and limits the connecting clamp 12, ensuring the accuracy of the core-pulling movement.

[0030] The combined core-pulling structure 7 includes an inclined core-pulling rod 15 and a straight core-pulling rod 16 disposed on the core-pulling fixing plate 6. The top of the inclined core-pulling rod 15 is provided with an auxiliary molding block 17. The inclined core-pulling rod 15 and the straight core-pulling rod 16 are arranged alternately. The core-pulling fixing plate 6 is provided with a slide seat 18. The bottom of the inclined core-pulling rod 15 is slidably engaged with the slide seat 18. The straight core-pulling rod 16 is slidably engaged with a limiting anti-deviation plate 9. A limiting slide groove 19 is provided in the limiting anti-deviation plate 9. The inclined core-pulling rod 15 passes through the limiting slide groove 19 and is slidably engaged with the limiting slide groove 19. The lower mold 1 for molding automotive interior parts is provided with an injection channel 20. The straight core-pulling rod 16 is arranged opposite to the injection channel 20.

[0031] In this embodiment, the core-pulling fixing plate 6 is provided with a slide seat 18, and the bottom of the inclined core-pulling rod 15 is slidably engaged with the slide seat 18; the straight core-pulling rod 16 is slidably engaged with the limiting anti-deviation plate 9, and the limiting anti-deviation plate 9 has a limiting groove 19, through which the inclined core-pulling rod 15 passes and is slidably engaged with the limiting groove 19; the lower mold 1 for molding automotive interior parts is provided with an injection channel 20, and the straight core-pulling rod 16 is positioned opposite the injection channel 20. Under the drive of the self-locking hydraulic cylinder drive structure 8, the core-pulling fixing plate 6 drives the inclined core-pulling rod 15 and the straight core-pulling rod 16 to move, and the inclined core-pulling rod 15 moves between the slide seat 18 and the limiting groove 19. Guided by the positioning groove 19, oblique core pulling is achieved, while the straight core pulling rod 16, guided by the positioning groove 19, achieves longitudinal core pulling. The auxiliary molding block 17 is used to mold complex structural parts of the interior trim. The staggered arrangement and coordinated movement of the oblique core pulling rod 15 and the straight core pulling rod 16 can meet the core pulling needs of automotive interior trim parts at multiple angles and directions. The slide block 18 and the positioning groove 19 guide and limit the core pulling rods, ensuring the stability and accuracy of the core pulling movement. The straight core pulling rod 16 is positioned directly opposite the injection channel 20, which can avoid damage to the injection channel 20 during the core pulling process and ensure the smooth progress of the injection molding process.

[0032] Combination Figure 1-2 As shown, the injection molding diversion component 3 includes an injection molding main board 21 disposed above the upper mold 2 for molding automotive interior parts, a diversion plate 22 disposed below the injection molding main board 21, and a plurality of injection tubes 23 disposed at the bottom of the diversion plate 22.

[0033] In this embodiment, the molten material injected by the injection molding machine flows into the manifold 22 through the injection main plate 21, and is then evenly distributed to each injection tube 23 by the manifold 22. Finally, it is injected into the molding cavity between the lower mold 1 and the upper mold 2 of the automotive interior parts through the injection tube 23. The manifold design can ensure that the molten material fills the molding cavity evenly, avoid the molding defects of the interior parts caused by uneven distribution of molten material, and improve product quality and production efficiency.

[0034] The working principle of this utility model is as follows:

[0035] During injection molding, the lower mold 1 and upper mold 2 for automotive interior parts are closed. The injection molding machine injects molten material into the injection manifold 3. The molten material is evenly filled into the molding cavity through the injection main plate 21, manifold 22, and injection tube 23. At this time, the cylinder 10 in the self-locking cylinder drive structure 8 maintains pressure, and the connecting clamp 12 is tightly engaged with the clamp groove 13, locking the combined core-pulling structure 7 to prevent the inclined core-pulling rod 15 and the straight core-pulling rod 16 from shifting under injection pressure. After injection molding is completed, the cylinder 10 is depressurized and released. In addition to locking the core-pulling fixing plate 6, the power shaft of the hydraulic cylinder 10 retracts, causing the connecting clamp 12 to slide within the clamp alignment groove 14. Simultaneously, it pulls the core-pulling fixing plate 6 downward. The core-pulling fixing plate 6 drives the inclined core-pulling rod 15 and the straight core-pulling rod 16 to move synchronously. Under the guidance of the slide block 18 and the limiting slide groove 19, the inclined core-pulling rod 15 achieves inclined core pulling, and the straight core-pulling rod 16 achieves longitudinal core pulling under the guidance of the limiting slide groove 19. This extracts the molded automotive interior parts from the mold, facilitating the subsequent demolding process.

[0036] 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.

[0037] Although this article frequently uses terms such as 1. lower mold for automotive interior parts, 2. upper mold for automotive interior parts, 3. injection manifold, 4. interior parts molding protrusion, 6. core-pulling fixing plate, 7. combined core-pulling structure, 8. self-locking hydraulic cylinder drive structure, 9. limiting anti-deviation plate, 10. hydraulic cylinder, 11. connecting piece, 12. connecting clip, 13. clip groove, 14. clip alignment groove, 15. inclined core-pulling rod, 16. straight core-pulling rod, 17. auxiliary molding block, 18. slide, 19. limiting slide groove, 20. injection channel, 21. injection main board, 22. manifold, and 23. injection tube, 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 self-locking hydraulic cylinder core-pulling mechanism for an injection mold of automotive interior parts, comprising a lower mold (1) for molding automotive interior parts and an upper mold (2) for molding automotive interior parts, characterized in that, The upper mold (2) for molding automotive interior parts is provided with an injection flow divider (3), the lower mold (1) for molding automotive interior parts is provided with an interior part molding protrusion (4), the upper mold (2) for molding automotive interior parts is provided with an interior part molding recess, the interior part molding protrusion (4) and the interior part molding recess are positioned and matched in shape, the lower mold (1) for molding automotive interior parts is provided with a core-pulling fixing plate (6), the core-pulling fixing plate (6) is provided with a combined core-pulling structure (7), and a self-locking hydraulic cylinder drive structure (8) is provided between the lower mold (1) for molding automotive interior parts and the core-pulling fixing plate (6).

2. The self-locking hydraulic cylinder core-pulling mechanism for automotive interior parts injection molds according to claim 1, characterized in that, The self-locking hydraulic cylinder drive structure (8) includes a limiting anti-deviation plate (9) disposed between the lower mold (1) for forming automotive interior parts and the core-pulling fixing plate (6). Four hydraulic cylinders (10) are provided above the limiting anti-deviation plate (9), and a connecting piece (11) that is engaged with the core-pulling fixing plate (6) is provided on the power shaft of the hydraulic cylinder (10).

3. The self-locking hydraulic cylinder core-pulling mechanism for automotive interior parts injection molds according to claim 2, characterized in that, The connector (11) includes a connecting clip (12) disposed on the power shaft of the oil cylinder (10), and the core-pulling fixing plate (6) has four clip slots (13), and the connecting clip (12) engages with the clip slots (13).

4. The self-locking hydraulic cylinder core-pulling mechanism for automotive interior parts injection molds according to claim 3, characterized in that, The bottom of the limiting anti-deviation plate (9) is provided with a head alignment groove (14), and the connecting head (12) slides in cooperation with the head alignment groove (14).

5. The self-locking hydraulic cylinder core-pulling mechanism for automotive interior parts injection molds according to claim 2, characterized in that, The combined core-pulling structure (7) includes an inclined core-pulling rod (15) and a straight core-pulling rod (16) disposed on the core-pulling fixing plate (6). The top of the inclined core-pulling rod (15) is provided with an auxiliary forming block (17), and the inclined core-pulling rod (15) and the straight core-pulling rod (16) are arranged alternately.

6. The self-locking hydraulic cylinder core-pulling mechanism for automotive interior parts injection molds according to claim 5, characterized in that, The core-pulling fixing plate (6) is provided with a slide (18), and the bottom of the inclined core-pulling rod (15) slides in cooperation with the slide (18).

7. The self-locking hydraulic cylinder core-pulling mechanism for automotive interior parts injection molds according to claim 5, characterized in that, The straight core rod (16) is slidably engaged with the limiting anti-deviation plate (9). The limiting anti-deviation plate (9) has a limiting groove (19) inside. The inclined core rod (15) passes through the limiting groove (19) and is slidably engaged with the limiting groove (19).

8. The self-locking hydraulic cylinder core-pulling mechanism for automotive interior parts injection molds according to claim 7, characterized in that, The lower mold (1) for molding automotive interior parts is provided with an injection channel (20), and the straight core rod (16) is positioned opposite the injection channel (20).

9. The self-locking hydraulic cylinder core-pulling mechanism for automotive interior parts injection molds according to claim 1, characterized in that, The injection molding manifold (3) includes an injection molding main board (21) disposed above the upper mold (2) for molding automotive interior parts, and a manifold (22) is provided below the injection molding main board (21).

10. The self-locking hydraulic cylinder core-pulling mechanism for automotive interior parts injection molds according to claim 9, characterized in that, The bottom of the flow divider (22) is provided with several injection tubes (23).

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