Latent large water gap and inclined ejection mechanism for injection mold of automobile decoration plate

Abstract

The utility model belongs to mould technical field especially relates to a big water port inclined top glue mechanism of latent type of automobile upper decorative plate injection mold. The utility model, including upper decorative plate forming lower mould and upper decorative plate forming upper mould, be equipped with two forming protrusions in the upper decorative plate forming lower mould, be equipped with two forming recesses in the upper decorative plate forming upper mould. The utility model in the using process, adopt latent type runner structure, cooperate with latent type water port portion through injection flow dividing spare, make plastics can enter the cavity along the oblique, greatly reduce the resistance of plastic flow, improve filling efficiency, effectively avoid the forming defects such as weld line, short shot, improve the surface quality of decorative plate, and the inclined top outside anti - deviation spare and large -area inclined top structure cooperation, can avoid large -area inclined top structure in the injection process to sway outward, guarantee the structural stability of mould under high -pressure injection environment, prolong the service life of mould, improve product forming precision.

Description

Technical Field

[0001] This utility model belongs to the field of mold technology and relates to a submerged large gate inclined ejector glue injection mechanism for automotive upper decorative panel injection mold. Background Technology

[0002] In the automotive interior manufacturing industry, decorative panels are crucial components, and their appearance quality and molding efficiency directly impact production efficiency and product quality. Traditional injection molds often employ standard direct gate or side gate designs for their injection mechanisms. This results in significant flow resistance for the plastic within the runner, leading to defects such as incomplete filling and weld lines, thus reducing product yield. Furthermore, conventional ejection structures have small ejection areas during demolding, making it difficult to achieve fast and stable demolding for complex-shaped decorative panels. The mold structure is also prone to wobbling during ejection, affecting mold life and product molding accuracy. In addition, existing angled ejector structures lack stability during injection molding, easily shifting and causing surface scratches and deformation of the decorative panels. Therefore, there is an urgent need to design a submarine-type large-gate angled ejector injection mechanism for automotive decorative panel injection molds that can overcome these shortcomings.

[0003] To overcome the shortcomings of existing technologies, people have continuously explored and proposed various solutions. For example, a Chinese patent discloses a mold for a decorative panel on a car door panel with integrated skin injection molding [Application No.: 201710818118.9]. This mold includes a cavity cover plate and a core cover plate. A cavity is installed under the cavity cover plate, and mold feet are set on both sides of the core cover plate. A core is installed on the mold feet, and the gap between the cavity and the core forms the mold cavity. A decorative panel for the car door panel is injection molded inside the mold cavity. One side of the upper decorative panel is semi-circular. An upper top plate and a lower top plate are set between the mold feet on both sides. An ejector rod is connected to the upper top plate, passing through the core and contacting the upper decorative panel. The semi-circular upper decorative panel has a side-pull-out locking mechanism. However, this solution is still prone to defects such as insufficient filling and weld lines during injection molding. Furthermore, when a slanted ejector is required, the slanted ejector structure is still prone to displacement, leading to problems such as scratches and deformation on the surface of the decorative panel. Utility Model Content

[0004] The purpose of this utility model is to address the above-mentioned problems by providing a submerged large gate inclined ejector mechanism for injection molds of automotive decorative panels.

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

[0006] A submerged sprue and angled ejector mechanism for an injection mold of an automotive upper decorative panel includes a lower mold and an upper mold. The lower mold has two forming protrusions, and the upper mold has two forming recesses. The protrusions and recesses are positioned and shaped accordingly. An ejector plate is located below the lower mold, and includes a straight ejector and a large-area angled ejector structure extending into the lower mold. An anti-deviation component is located on the outer side of the angled ejector in the lower mold, and the large-area angled ejector structure slides in conjunction with this anti-deviation component. The lower mold has a submerged sprue, and the upper mold has an injection manifold above it, with the manifold corresponding to the submerged sprue.

[0007] In the above-mentioned submerged large gate angled ejector injection mechanism of the automotive upper decorative panel injection mold, the large area angled ejector structure includes two sets of side angled ejector plates disposed in the lower mold of the upper decorative panel forming. Each set of side angled ejector plates consists of three angled ejector strips, and the angled ejector strips are connected to the ejector plate by a connector.

[0008] In the above-mentioned submerged large gate inclined ejector injection mechanism of the automotive upper decorative panel injection mold, the connecting member includes an inclined ejector rod disposed at the bottom of the inclined ejector bar, and a slide seat is provided in the ejector plate, and the bottom of the inclined ejector rod is slidably engaged with the slide seat.

[0009] In the above-mentioned submerged large gate inclined ejector injection mechanism of the automotive upper decorative panel injection mold, the straight ejector includes a plurality of straight ejector rods disposed on the ejector plate, and the straight ejector rods and the inclined ejector bars are arranged alternately.

[0010] In the above-mentioned submerged large gate inclined ejector injection mechanism of the automotive upper decorative panel injection mold, the inclined ejector outer anti-deviation component includes two outer anti-deviation platforms disposed in the lower mold of the upper decorative panel forming, and the outer side of the inclined ejector bar abuts against the inner side of the outer anti-deviation platform.

[0011] In the above-mentioned submerged large gate inclined ejector injection mechanism of the automotive decorative panel injection mold, a fixed base plate is provided below the ejector plate, and two anti-deviation irons are provided on the fixed base plate. The ejector plate and the anti-deviation irons are in sliding cooperation.

[0012] In the above-mentioned submerged sprue inclined ejector injection mechanism of the automotive upper decorative panel injection mold, the submerged sprue section includes a plurality of injection sprues disposed in the lower mold of the upper decorative panel forming, the injection sprues are recessed inward, and the injection sprues correspond to the positions of the injection manifold.

[0013] In the aforementioned submerged large gate inclined ejector injection mechanism of the automotive upper decorative panel injection mold, the injection diversion component includes an injection main plate and an injection diversion plate disposed on the upper mold of the upper decorative panel forming.

[0014] In the above-mentioned submerged large gate inclined ejector injection mechanism of the automotive decorative panel injection mold, the injection manifold is provided with a number of injection manifolds, and the bottom of the injection manifolds extends into the injection gate.

[0015] In the aforementioned submerged large gate inclined ejector injection mechanism of the automotive upper decorative panel injection mold, a cooling water pipe assembly is provided in the lower mold for forming the upper decorative panel.

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

[0017] 1. In use, this utility model adopts a submerged runner structure. Through the cooperation of the injection molding diverter and the submerged gate, the plastic can enter the cavity at an angle, which greatly reduces the resistance of plastic flow, improves filling efficiency, effectively avoids molding defects such as weld lines and short shots, and improves the surface quality of the decorative panel. In addition, the anti-deviation part on the outside of the angled ejector cooperates with the large-area angled ejector structure to prevent the large-area angled ejector structure from shaking outward during injection, ensuring the structural stability of the mold under high-pressure injection environment, extending the service life of the mold, and improving the molding accuracy of the product.

[0018] 2. The straight ejector and the large-area inclined ejector structure in this utility model work together to quickly eject and demold the molded plastic part. The large-area inclined ejector structure increases the ejection area, disperses the ejection force, and prevents the decorative panel from deforming or being damaged during demolding, thus significantly improving ejection efficiency and demolding reliability.

[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 yes Figure 2 Enlarged diagram of point A in the middle.

[0023] Figure 4 This is a partial structural schematic diagram of another aspect of this utility model.

[0024] Figure 5 This is a schematic diagram of the upper mold for forming the upper decorative panel.

[0025] In the diagram: 1. Lower mold for upper decorative panel forming; 2. Upper mold for upper decorative panel forming; 3. Forming protrusion; 4. Forming recess; 5. Ejector plate; 6. Straight ejector; 7. Large area angled ejector structure; 8. Anti-deviation component on the outer side of the angled ejector; 9. Submerged sprue; 10. Injection manifold; 11. Side angled ejector plate; 12. Angled ejector bar; 13. Connector; 14. Angled ejector rod; 15. Slide seat; 16. Straight ejector rod; 17. Outer anti-deviation platform; 18. Fixed base plate; 19. Anti-deviation iron; 20. Injection gate; 21. Injection main plate; 22. Injection manifold; 23. Cooling water pipe assembly; 24. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings.

[0027] like Figure 1-5 As shown, a submerged sprue and angled ejector injection mechanism for an automotive upper decorative panel injection mold includes a lower mold 1 and an upper mold 2 for forming the upper decorative panel. The lower mold 1 has two forming protrusions 3, and the upper mold 2 has two forming recesses 4. The forming protrusions 3 and the forming recesses 4 are positioned and matched in shape. An ejector plate 5 is provided below the lower mold 1. The ejector plate 5 has a straight ejector 6 extending into the lower mold 1 and a large-area angled ejector structure 7. An anti-deviation member 8 is provided on the outer side of the angled ejector in the lower mold 1. The large-area angled ejector structure 7 and the anti-deviation member 8 slide in cooperation. The lower mold 1 has a submerged sprue 9, and an injection diverter 10 is provided above the upper mold 2. The injection diverter 10 is positioned corresponding to the submerged sprue 9.

[0028] In this embodiment, during the injection molding process, the lower mold 1 and the upper mold 2 of the upper decorative panel are close to each other. The lower mold 1 of the upper decorative panel is provided with two molding protrusions 3, and the upper mold 2 of the upper decorative panel is provided with two corresponding molding recesses 4. The two are positioned and matched in shape, and together form the molding cavity of the upper decorative panel of the car when the mold is closed. An ejector plate 5 is provided below the lower mold 1 of the upper decorative panel. The ejector plate 5 is provided with a straight ejector 6 and a large-area inclined ejector structure 7. The two extend into the lower mold 1 of the upper decorative panel for demolding of the plastic part. An anti-deviation part 8 of the inclined ejector is installed in the lower mold 1 of the upper decorative panel, which slides with the large-area inclined ejector structure 7 to limit its deviation. The lower mold 1 for forming the decorative panel has a submerged sprue 9, and the upper mold 2 for forming the upper decorative panel has an injection manifold 10 above it. The two are positioned correspondingly to form a submerged injection channel. The submerged flow channel structure, through the cooperation of the injection manifold and the submerged sprue, allows the plastic to enter the cavity at an angle, greatly reducing the resistance to plastic flow, improving filling efficiency, effectively avoiding molding defects such as weld lines and short shots, and improving the surface quality of the decorative panel. In addition, the anti-deviation component on the outside of the angled ejector, in cooperation with the large-area angled ejector structure, can prevent the large-area angled ejector structure from shaking outward during injection, ensuring the structural stability of the mold under high-pressure injection environment, extending the mold service life, and improving the product molding accuracy.

[0029] Combination Figure 1-5 As shown, the large-area inclined top structure 7 includes two sets of side inclined top plates 11 disposed in the lower mold 1 for forming the upper decorative plate. Each set of side inclined top plates 11 is composed of three inclined top strips 12. The inclined top strips 12 are connected to the ejector plate 5 through a connector 13. The connector 13 includes an inclined top rod 14 disposed at the bottom of the inclined top strip 12. The ejector plate 5 is provided with a slide seat 15. The bottom of the inclined top rod 14 is slidably engaged with the slide seat 15.

[0030] In this embodiment, the large-area inclined ejector structure 7 includes two sets of side inclined ejector plates 11 disposed in the lower mold 1 for forming the upper decorative panel. Each set of side inclined ejector plates 11 consists of three inclined ejector bars 12, forming a large ejection area. The inclined ejector bars 12 are connected to the ejection plate 5 by a connector 13. The connector 13 specifically includes an inclined ejector rod 14 disposed at the bottom of the inclined ejector bar 12 and a slide block 15 in the ejection plate 5. The bottom of the inclined ejector rod 14 is slidably engaged with the slide block 15. When the ejection plate 5 moves upward, the inclined ejector rod 14 slides in the slide block 15, driving the inclined ejector bar 12 to be ejected obliquely at a specific angle. This design increases the ejection area by using multiple inclined ejector bars, making the decorative panel uniformly stressed and avoiding deformation caused by local stress concentration. At the same time, the oblique ejection method adapts to the complex structure of the decorative panel and improves demolding efficiency.

[0031] Combination Figure 4 As shown, the straight pusher 6 includes a plurality of straight push rods 16 disposed on the push plate 5, and the straight push rods 16 are arranged alternately with the inclined push bar 12.

[0032] In this embodiment, during the demolding process, the straight ejector rod 16 and the inclined ejector bar 12 work together. The straight ejector rod 16 provides vertical ejection force, and the inclined ejector bar 12 provides inclined ejection force. The two work together to apply force to different parts of the decorative panel at the same time, which further improves the stability and reliability of demolding and ensures that the decorative panel can be demolded smoothly without damage.

[0033] The outer anti-deviation component 8 of the inclined top includes two outer anti-deviation platforms 17 disposed in the lower mold 1 for forming the upper decorative plate, and the outer side of the inclined top strip 12 abuts against the inner side of the outer anti-deviation platform 17.

[0034] In this embodiment, during the injection molding process, the high pressure generated by the plastic injection cavity will exert a lateral force on the inclined ejector structure. At this time, the outer anti-deviation platform 17 can effectively prevent the inclined ejector bar 12 from shifting outward, ensuring the positional accuracy of the inclined ejector structure under high pressure environment, avoiding defects such as scratches and burrs on the surface of the decorative panel due to the wobbling of the inclined ejector, and improving product quality and mold stability.

[0035] Combination Figure 1 As shown, a fixed base plate 18 is provided below the ejector plate 5, and two anti-deviation irons 19 are provided on the fixed base plate 18. The ejector plate 5 and the anti-deviation irons 19 are slidably engaged.

[0036] In this embodiment, during the movement of the ejector plate 5 driving the straight ejector 6 and the large-area inclined ejector structure 7, the anti-deviation iron 19 provides guidance and limit for the ejector plate 5, preventing the ejector plate 5 from shifting laterally during movement, ensuring that the straight ejector rod 16 and the inclined ejector bar 12 can accurately eject the plastic part, and further improving the stability and reliability of the demolding process.

[0037] The submerged sprue section 9 includes a plurality of injection sprues 20 disposed in the lower mold 1 for forming the upper decorative panel. The injection sprues 20 are recessed inward. The injection sprues 20 correspond to the positions of the injection diverter 10. The injection diverter 10 includes an injection main plate 21 and an injection diverter plate 22 disposed in the upper mold 2 for forming the upper decorative panel. The injection diverter plate 22 is provided with a plurality of injection diverter pipes 23. The bottom of the injection diverter pipes 23 extends into the injection sprues 20.

[0038] In this embodiment, during injection molding, the molten plastic flows from the injection main plate 21 into the injection manifold 22, then through the injection manifold 23 and is injected obliquely into the injection gate 20, finally entering the mold cavity. The submerged runner structure conceals the gate location, eliminating the need for subsequent secondary processing to remove the gate. Furthermore, the oblique injection method reduces plastic flow resistance, improves filling effect, and enhances product appearance and molding quality.

[0039] Combination Figure 4 As shown, the lower mold 1 for forming the upper decorative panel is provided with a cooling water pipe assembly 24.

[0040] In this embodiment, during the injection molding process, by introducing coolant into the cooling water pipe assembly 24, the heat inside the mold can be quickly removed, allowing the plastic part to cool and solidify rapidly, shortening the molding cycle, improving production efficiency, and ensuring the dimensional accuracy and surface quality of the plastic part.

[0041] The working principle of this utility model is as follows:

[0042] During mold closing, the forming protrusion 3 of the lower mold 1 for forming the upper decorative panel mates with the forming recess 4 of the upper mold 2 for forming the upper decorative panel to form a cavity. The molten plastic flows into the injection manifold 22 through the injection main plate 21 and is injected obliquely into the injection gate 20 through the injection manifold 23, thereby filling the cavity. During this process, the outer anti-deviation platform 17 abuts against the inclined ejector bar 12 to prevent the inclined ejector structure from shifting under injection pressure, ensuring the stability of the cavity shape, ensuring uniform plastic filling, and improving molding quality.

[0043] After injection molding, the ejector plate 5 moves upward under the action of the drive device, driving the straight ejector rod 16 and the inclined ejector bar 12 to move synchronously. The straight ejector rod 16 ejects the decorative panel vertically, and the inclined ejector bar 12 ejects obliquely with the cooperation of the inclined ejector rod 14 and the slide block 15. The two work together to eject the decorative panel from the cavity and demold it. The multiple inclined ejector bars increase the ejection area, making the decorative panel bear the force evenly and avoiding deformation. At the same time, the ejector plate 5 cooperates with the anti-deviation iron 19 to ensure that the ejection process is stable and accurate, and finally achieves efficient and reliable demolding of the decorative panel.

[0044] 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.

[0045] Although this article frequently uses terms such as 1. Upper decorative panel forming lower mold, 2. Upper decorative panel forming upper mold, 3. Forming protrusion, 4. Forming recess, 5. Ejector plate, 6. Straight ejector, 7. Large area angled ejector structure, 8. Angled ejector outer anti-deviation component, 9. Submerged sprue, 10. Injection molding manifold, 11. Side angled ejector plate, 12. Angled ejector strip, 13. Connector, 14. Angled ejector rod, 15. Slide block, 16. Straight ejector rod, 17. Outer anti-deviation platform, 18. Fixed base plate, 19. Anti-deviation iron, 20. Injection molding sprue, 21. Injection molding main plate, 22. Injection molding manifold, 23. Injection molding manifold, 24. Cooling water pipe assembly, etc., 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 submerged large gate angled ejector injection mechanism for an injection mold of an automotive upper decorative panel, comprising a lower mold (1) for forming the upper decorative panel and an upper mold (2) for forming the upper decorative panel, characterized in that, The lower mold (1) for forming the upper decorative panel has two forming protrusions (3), and the upper mold (2) for forming the upper decorative panel has two forming recesses (4). The forming protrusions (3) and the forming recesses (4) are positioned and matched in shape. The lower mold (1) for forming the upper decorative panel has an ejector plate (5) below it. The ejector plate (5) has a straight ejector (6) extending into the lower mold (1) for forming the upper decorative panel and a large-area inclined ejector structure (7). The lower mold (1) for forming the upper decorative panel has an anti-deviation component (8) on the outer side of the inclined ejector. The large-area inclined ejector structure (7) and the anti-deviation component (8) on the outer side of the inclined ejector slide together. The lower mold (1) for forming the upper decorative panel has a submerged sprue section (9). The upper mold (2) for forming the upper decorative panel has an injection molding branch (10) above it. The injection molding branch (10) is positioned corresponding to the submerged sprue section (9).

2. The submerged large gate inclined ejector injection mechanism for automotive upper decorative panel injection molds according to claim 1, characterized in that, The large-area inclined top structure (7) includes two sets of side inclined top plates (11) set in the lower mold (1) for forming the upper decorative plate. Each set of side inclined top plates (11) consists of three inclined top strips (12). The inclined top strips (12) are connected to the ejector plate (5) through a connector (13).

3. The submerged large gate inclined ejector injection mechanism for automotive upper decorative panel injection molds according to claim 2, characterized in that, The connector (13) includes an inclined push rod (14) disposed at the bottom of the inclined push bar (12), and a slide (15) is provided in the ejector plate (5). The bottom of the inclined push rod (14) is slidably engaged with the slide (15).

4. The submerged large gate inclined ejector injection mechanism for automotive upper decorative panel injection molds according to claim 3, characterized in that, The straight pusher (6) includes a plurality of straight push rods (16) disposed on the ejector plate (5), and the straight push rods (16) are alternately disposed with the inclined pusher strips (12).

5. The submerged large gate inclined ejector injection mechanism for automotive upper decorative panel injection molds according to claim 2, characterized in that, The inclined top outer anti-deviation component (8) includes two outer anti-deviation platforms (17) disposed in the lower mold (1) for forming the upper decorative plate, and the outer side of the inclined top strip (12) abuts against the inner side of the outer anti-deviation platform (17).

6. The submerged large gate inclined ejector injection mechanism for automotive upper decorative panel injection molds according to claim 1, characterized in that, A fixed base plate (18) is provided below the ejector plate (5), and two anti-deviation irons (19) are provided on the fixed base plate (18). The ejector plate (5) and the anti-deviation irons (19) are slidably engaged.

7. The submerged large gate inclined ejector injection mechanism for automotive upper decorative panel injection molds according to claim 1, characterized in that, The submerged sprue section (9) includes a plurality of injection sprues (20) disposed in the lower mold (1) for forming the upper decorative plate. The injection sprues (20) are recessed inward and correspond to the position of the injection sprue (20) and the injection sprue (10).

8. The submerged large gate inclined ejector injection mechanism for automotive upper decorative panel injection molds according to claim 7, characterized in that, The injection molding manifold (10) includes an injection molding main plate (21) and an injection molding manifold (22) disposed on the upper mold (2) for molding the upper decorative plate.

9. The submerged large gate inclined ejector injection mechanism for automotive upper decorative panel injection molds according to claim 8, characterized in that, The injection molding manifold (22) is provided with a plurality of injection molding manifolds (23), and the bottom of the injection molding manifolds (23) extends into the injection molding nozzle (20).

10. The submerged large gate inclined ejector injection mechanism for automotive upper decorative panel injection molds according to any one of claims 1-9, characterized in that, The lower mold (1) for forming the upper decorative panel is provided with a cooling water pipe assembly (24).

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