Automobile SMC hatch panel compression molding mold

Abstract

This utility model belongs to the field of mold technology and relates to a molding die for automotive SMC cabin door panels. The utility model includes a lower molding die and an upper molding die for cabin door panels. A top plate is provided above the upper molding die. The lower molding die has an inner panel lower forming part and an outer panel lower forming protrusion. The upper molding die has an inner panel upper forming part and an outer panel upper forming recess. The inner panel lower forming part and the inner panel upper forming part are directly opposite each other, and the outer panel lower forming protrusion and the outer panel upper forming recess are directly opposite each other. A simultaneous ejection and demolding structure for the inner and outer panels is provided below the lower molding die. In use, this utility model optimizes the mold feeding method and forming structure, eliminating the need for a gate on the fence surface and saving the subsequent gate shearing process. This not only improves production efficiency but also avoids surface damage caused by gate shearing, ensuring the integrity and aesthetics of the fence surface.

Description

Technical Field

[0001] This utility model belongs to the field of mold technology and relates to a molding die for automotive SMC cabin door panels. Background Technology

[0002] In the automotive manufacturing industry, SMC (sheet molding compound) material is widely used in the production of automotive SMC door panels and other parts due to its excellent properties such as lightweight, high strength, and corrosion resistance. Currently, traditional automotive SMC door panel molding dies suffer from two main problems during production: first, gates are required during molding, and these gates need to be sheared after molding, which not only increases the number of processes but also easily leaves marks on the door panel surface, affecting the product's appearance quality; second, during demolding, due to an unreasonable ejection mechanism design, the door panel surface is easily damaged, reducing product precision and yield. Therefore, there is an urgent need to design an automotive SMC door panel molding die that can overcome these defects.

[0003] To overcome the shortcomings of existing technologies, people have continuously explored and proposed various solutions. For example, a Chinese patent discloses a door cover edge positioning stamping device [application number: 202511087168.5], which includes a device body, control panel, stamping base, lower mold, upper mold, hydraulic system and control system, as well as a positioning mechanism. The positioning mechanism includes an electromagnetic positioning mechanism and an adsorption positioning mechanism. The electromagnetic positioning mechanism consists of a top plate, positioning column, electromagnetic induction coil, sealing plate and positioning mark; the positioning mark is coated on the door cover at the position where punching is required. However, this solution is not suitable for producing automobile door panels, and it is still difficult to simultaneously form the inner and outer panels, resulting in the defect that the product surface is easily damaged during ejection. Utility Model Content

[0004] The purpose of this utility model is to address the above-mentioned problems by providing a molding die for automotive SMC cabin door panels.

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

[0006] A molding die for SMC (Self-Made Manufacturing Corporation) automotive door panels includes a lower molding die and an upper molding die. The upper molding die has a top plate. The lower molding die contains a lower inner panel forming part and a lower outer panel forming protrusion. The upper molding die contains an upper inner panel forming part and an upper outer panel forming recess. The lower inner panel forming part and the upper inner panel forming part are directly opposite each other, and the lower outer panel forming protrusion and the upper outer panel forming recess are directly opposite each other. A simultaneous ejection and demolding structure for the inner and outer panels is located below the lower molding die.

[0007] In the aforementioned automotive SMC door panel molding die, the lower inner panel forming part includes an inner panel main body forming protrusion disposed in the lower mold of the door panel molding die. The inner side of the inner panel main body forming protrusion has a recessed cavity. The inner panel main body forming protrusion and the recessed cavity are respectively positioned and matched with the lower inner panel forming part.

[0008] In the above-mentioned automotive SMC door panel molding die, the upper forming part of the inner panel includes an inner panel main body forming groove and an alignment protrusion disposed in the upper mold of the door panel molding die. The inner panel main body forming groove and the inner panel main body forming protrusion are directly opposite each other, and the alignment protrusion and the recessed cavity are directly opposite each other.

[0009] In the aforementioned automotive SMC door panel molding die, a snap-fit ​​structure is provided between the inner panel body forming protrusion and the alignment protrusion.

[0010] In the aforementioned automotive SMC door panel molding die, the snap-fit ​​structure includes a snap-fit ​​protrusion disposed inside the inner panel body molding protrusion, the alignment protrusion having a snap-fit ​​cavity, and the snap-fit ​​protrusion and the snap-fit ​​cavity being positioned and matched in shape.

[0011] In the aforementioned automotive SMC door panel molding die, the lower outer panel forming protrusion includes an outer panel lower forming protrusion disposed in the lower mold of the door panel molding die, and the upper outer panel forming recess includes an outer panel upper forming cavity disposed in the upper mold of the door panel molding die. The lower outer panel forming protrusion and the upper outer panel forming recess are positioned correspondingly and have matching shapes.

[0012] In the aforementioned automotive SMC cabin door panel molding die, the lower forming protrusion of the outer panel has four small hole forming grooves and one alignment hole forming groove, and the upper forming cavity of the outer panel is provided with four small hole forming shafts and one alignment hole forming shaft. The small hole forming shafts are arranged opposite to the small hole forming grooves, and the alignment hole forming shafts are arranged opposite to the alignment hole forming grooves.

[0013] In the aforementioned automotive SMC door panel molding die, the synchronous ejection and demolding structure of the inner and outer panels includes a push rod fixing slide plate disposed below the lower mold of the door panel molding die. The push rod fixing slide plate is provided with a plurality of inner panel push rods and outer panel push rods. The inner panel push rods pass through the inner panel body forming protrusions, and the outer panel push rods pass through the lower part of the outer panel forming protrusions.

[0014] In the aforementioned automotive SMC door panel molding die, several hydraulic cylinders are provided above the push rod fixing slide plate to drive the push rod fixing slide plate to move up and down.

[0015] In the aforementioned automotive SMC door panel molding die, the lower mold of the door panel molding has a lower mold cooling pipe assembly, and the upper mold of the door panel molding has an upper mold cooling pipe assembly.

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

[0017] 1. In the process of using this utility model, by optimizing the mold feeding method and molding structure, there is no need to set the gate on the fence surface, which eliminates the subsequent gate cutting process. This not only improves production efficiency, but also avoids surface damage caused by gate cutting, ensuring the integrity and aesthetics of the fence surface.

[0018] 2. The synchronous ejection and demolding structure of the inner and outer plates in this utility model can realize the synchronous and stable ejection of the inner and outer plates, avoid product deformation or surface damage caused by uneven ejection force, and ensure the dimensional accuracy and surface quality of the product.

[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 cross-sectional schematic diagram of the present invention.

[0022] Figure 3 This is a partial structural schematic diagram of the present invention.

[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 molding the hatch panel.

[0025] In the diagram: 1. Lower mold for cabin door panel molding; 2. Upper mold for cabin door panel molding; 3. Top plate; 4. Lower forming part of inner plate; 5. Lower forming protrusion of outer plate; 6. Upper forming part of inner plate; 7. Upper forming recess of outer plate; 8. Synchronous ejection and demolding structure for inner and outer plates; 9. Main forming protrusion of inner plate; 10. Recessed cavity; 11. Main forming groove of inner plate; 12. Alignment protrusion; 13. Snap-fit ​​forming structure; 14. Snap-fit ​​forming protrusion; 15. Lower forming protrusion of outer plate; 16. Upper forming cavity of outer plate; 17. Small hole forming groove; 18. Alignment hole forming groove; 19. Small hole forming shaft; 20. Alignment hole forming shaft; 21. Push rod fixing slide plate; 22. Inner plate push rod; 23. Outer plate push rod; 24. Oil cylinder; 25. Lower mold cooling pipe assembly; 26. Upper mold cooling pipe assembly; 27. Detailed Implementation

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

[0027] like Figure 1-5 As shown, an automotive SMC door panel molding die includes a lower door panel molding die 1 and an upper door panel molding die 2. A top plate 3 is provided above the upper door panel molding die 2. The lower door panel molding die 1 has an inner panel lower forming part 4 and an outer panel lower forming protrusion 5. The upper door panel molding die 2 has an inner panel upper forming part 6 and an outer panel upper forming recess 7. The inner panel lower forming part 4 and the inner panel upper forming part 6 are arranged opposite each other, and the outer panel lower forming protrusion 5 and the outer panel upper forming recess 7 are arranged opposite each other. A synchronous ejection demolding structure 8 for the inner and outer panels is provided below the lower door panel molding die 1.

[0028] In this embodiment, the precise molding of the inner and outer panels of the hatch can be achieved by the cooperation of the lower forming part 4 and the upper forming part 6 of the inner panel, and the cooperation of the lower forming protrusion 5 and the upper forming concave part 7 of the outer panel. The synchronous ejection and demolding structure 8 of the inner and outer panels ensures that the product can be demolded smoothly and without damage after molding. The molding structures of the inner and outer panels are integrated into the same mold, realizing integrated molding. At the same time, by reasonably setting the ejection structure, the foundation is laid for subsequent high-precision ejection and demolding. Furthermore, there is no need to set a gate on the surface of the fence, achieving the effect of gate-free and shear-free molding.

[0029] Combination Figure 1-5 As shown, the lower inner panel forming part 4 includes an inner panel main body forming protrusion 9 disposed in the lower mold 1 of the door panel molding. The inner panel main body forming protrusion 9 has a recessed cavity 10 on its inner side. The inner panel main body forming protrusion 9 and the recessed cavity 10 are respectively positioned and matched with the lower inner panel forming part 4.

[0030] Specifically, the inner panel body forming protrusion 9 and recessed cavity 10 cooperate with the upper forming part 6 of the inner panel to form the forming space of the inner panel. This can accurately form the inner panel body and its inner recessed structure, ensuring the shape accuracy of the inner panel. Through the design of the inner panel body forming protrusion 9 and recessed cavity 10, which are precisely matched with the upper forming part 6 of the inner panel, not only is the one-time forming of the complex structure of the inner panel achieved, but also the setting of the gate during the forming process is avoided, ensuring the surface quality of the inner panel.

[0031] The upper forming part 6 of the inner plate includes an inner plate main body forming groove 11 and an alignment protrusion 12 disposed in the upper mold 2 of the door plate molding. The inner plate main body forming groove 11 and the inner plate main body forming protrusion 9 are directly opposite each other, and the alignment protrusion 12 is directly opposite to the recessed cavity 10.

[0032] In this embodiment, the inner plate main body forming groove 11 and the inner plate main body forming protrusion 9 are interlocked, and the alignment protrusion 12 is embedded in the recessed cavity 10, which further improves the forming accuracy of the inner plate and ensures the accuracy of the shape of the inner plate main body and the inner recessed structure. The design of the inner plate main body forming groove 11 and the alignment protrusion 12 is precisely matched with the structure of the lower forming part 4 of the inner plate. During the forming process, the material flow and forming can be well constrained, ensuring the dimensional accuracy and surface quality of the inner plate. At the same time, no additional gate is required, realizing gateless forming.

[0033] Combination Figure 3 , Figure 5 As shown, a snap-fit ​​structure 13 is provided between the inner plate main body forming protrusion 9 and the alignment protrusion 12.

[0034] In this embodiment, the snap-fit ​​molding structure 13 is located between the inner plate main body molding protrusion 9 and the alignment protrusion 12. During the molding process, the material fills the space to form a snap-fit, which can form the snap-fit ​​structure on the inner plate in one step, eliminating the need for subsequent processing steps and improving production efficiency. The snap-fit ​​molding structure 13 is integrated into the overall structure of the inner plate molding. The snap-fit ​​is precisely formed by the cooperation between the inner plate main body molding protrusion 9 and the alignment protrusion 12, without affecting the surface quality of the fence, and without the need to set a gate.

[0035] The snap-fit ​​structure 13 includes a snap-fit ​​protrusion 14 disposed inside the inner plate main body forming protrusion 9. The alignment protrusion 12 has a snap-fit ​​cavity 15. The snap-fit ​​protrusion 14 and the snap-fit ​​cavity 15 are positioned correspondingly and matched in shape.

[0036] In this embodiment, the snap-fit ​​protrusion 14 is embedded in the snap-fit ​​forming cavity 15, and the space between the two is the snap-fit ​​forming space, which ensures the forming accuracy and quality of the snap-fit, so that the snap-fit ​​can meet the usage requirements. Through the precise cooperation between the snap-fit ​​protrusion 14 and the snap-fit ​​forming cavity 15, the high-quality forming of the snap-fit ​​is achieved, and this structural design will not leave marks on the fence surface, nor is it necessary to set a gate.

[0037] Combination Figure 3-5 As shown, the lower forming protrusion 5 of the outer panel includes a lower forming protrusion 16 of the outer panel disposed in the lower mold 1 of the door panel molding, and the upper forming concave part 7 of the outer panel includes an upper forming cavity 17 of the outer panel disposed in the upper mold 2 of the door panel molding. The lower forming protrusion 16 of the outer panel and the upper forming cavity 17 of the outer panel are positioned correspondingly and have matching shapes.

[0038] In this embodiment, the lower forming protrusion 16 of the outer panel is embedded in the upper forming cavity 17 of the outer panel to form the forming space of the outer panel. This allows for precise forming of the main structure of the outer panel, ensuring the shape and dimensional accuracy of the outer panel. The design of the lower forming protrusion 16 and the upper forming cavity 17 of the outer panel not only achieves efficient forming of the outer panel, but also eliminates the need to set a gate on the surface of the fence during the forming process, ensuring the integrity and aesthetics of the outer panel surface.

[0039] The lower part of the outer plate has four small hole forming grooves 18 and one alignment hole forming groove 19 in the forming protrusion 16. The upper part of the outer plate has four small hole forming shafts 20 and one alignment hole forming shaft 21 in the forming cavity 17. The small hole forming shafts 20 and the small hole forming grooves 18 are directly opposite each other, and the alignment hole forming shafts 21 and the alignment hole forming grooves 19 are directly opposite each other.

[0040] In this embodiment, the small hole forming shaft 20 is inserted into the small hole forming groove 18, and the alignment hole forming shaft 21 is inserted into the alignment hole forming groove 19. During the molding process, small holes and alignment holes are formed on the outer plate. The small holes and alignment holes on the outer plate can be formed in one step, which improves production efficiency and hole forming accuracy. The forming structure of small holes and alignment holes is integrated into the overall structure of outer plate forming. The forming is achieved by the precise cooperation between the small hole forming shaft 20 and the small hole forming groove 18, and the alignment hole forming shaft 21 and the alignment hole forming groove 19. The forming does not affect the surface quality of the fence and there is no need to set a gate.

[0041] Combination Figure 1-5 As shown, the synchronous ejection and demolding structure 8 of the inner and outer panels includes a push rod fixing slide plate 22 disposed below the lower mold 1 of the door panel molding. The push rod fixing slide plate 22 is provided with a plurality of inner panel push rods 23 and outer panel push rods 24. The inner panel push rods 23 pass through the inner panel body forming protrusion 9, and the outer panel push rods 24 pass through the lower part of the outer panel forming protrusion 16.

[0042] In this embodiment, the inner plate top rod 23 and the outer plate top rod 24 are respectively installed on the top rod fixing slide plate 22. They move synchronously with the movement of the top rod fixing slide plate 22. The inner plate top rod 23 can act on the inner plate, and the outer plate top rod 24 can act on the outer plate, realizing the synchronous ejection of the inner and outer plates. This avoids product deformation or surface damage caused by asynchronous ejection. This synchronous ejection structure is designed so that the inner plate top rod 23 and the outer plate top rod 24 can move synchronously through the top rod fixing slide plate 22, ensuring the stability and high precision of the ejection process, thereby not affecting the surface quality of the fence.

[0043] Combination Figure 1-5 As shown, a plurality of hydraulic cylinders 25 are provided above the top rod fixing slide plate 22 for driving the top rod fixing slide plate 22 to move up and down.

[0044] In this embodiment, the output end of the hydraulic cylinder 25 is connected to the push rod fixing slide plate 22. The extension and retraction of the hydraulic cylinder 25 drives the push rod fixing slide plate 22 to move up and down, providing stable power for the movement of the push rod fixing slide plate 22, ensuring the reliability and accuracy of the ejection and demolding process. The use of hydraulic cylinder 25 to drive the push rod fixing slide plate 22 can accurately control the moving speed and stroke of the push rod fixing slide plate 22, further ensuring the accuracy of synchronous ejection of the inner and outer plates and avoiding damage to the surface of the fence.

[0045] Combination Figure 1-5 As shown, the lower mold 1 for molding the hatch panel has a lower mold cooling pipe assembly 26, and the upper mold 2 for molding the hatch panel has an upper mold cooling pipe assembly 27.

[0046] In this embodiment, the lower mold cooling pipe assembly 26 and the upper mold cooling pipe assembly 27 are respectively installed inside the lower mold 1 and the upper mold 2 of the hatch panel molding. By introducing a cooling medium to cool the mold, the mold temperature can be effectively controlled, the curing speed of the SMC material can be accelerated, the production efficiency can be improved, and the stability of product quality can be guaranteed. The reasonable setting of the position and distribution of the cooling pipe assembly can ensure that all parts of the mold can be cooled evenly, further ensuring the molding quality of the product. Moreover, it works well with other structures and does not affect the gateless, shear-free and high-precision ejection demolding effect.

[0047] The working principle of this utility model is as follows:

[0048] First, SMC material is placed onto the lower inner panel forming part 4 and the lower outer panel forming protrusion 5 of the lower mold 1 for door panel molding. Then, the upper mold 2 for door panel molding is driven downwards, causing the upper mold 2 to close with the lower mold 1. During the mold closing process, the lower inner panel forming part 4 and the upper inner panel forming part 6 cooperate to extrude and mold the SMC material, forming the inner panel of the door panel; the lower outer panel forming protrusion 5 and the upper outer panel forming recess 7 cooperate to form the outer panel of the door panel. Simultaneously, the snap-fit ​​forming structure 13, the small hole forming structure, and the alignment hole forming structure respectively form the snap-fit ​​on the inner plate, the small hole on the outer plate, and the alignment hole. During the molding process, the cooling medium is introduced into the lower mold cooling pipe group 26 and the upper mold cooling pipe group 27 to cool the mold and accelerate the curing of the SMC material. After molding, the hydraulic cylinder 25 drives the ejector pin fixing slide plate 22 to move upward. The ejector pin fixing slide plate 22 drives the inner plate ejector pin 23 and the outer plate ejector pin 24 to move upward synchronously. The inner plate ejector pin 23 pushes the inner plate out from the lower forming part 4 of the inner plate, and the outer plate ejector pin 24 pushes the outer plate out from the lower forming protrusion 5 of the outer plate, realizing the synchronous demolding of the inner and outer plates.

[0049] 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.

[0050] Although this article frequently uses terms such as hatch panel molding lower mold 1, hatch panel molding upper mold 2, top plate 3, inner panel lower forming part 4, outer panel lower forming protrusion 5, inner panel upper forming part 6, outer panel upper forming recess 7, inner and outer panel synchronous ejection demolding structure 8, inner panel main body forming protrusion 9, recessed cavity 10, inner panel main body forming groove 11, alignment protrusion 12, snap-fit ​​forming structure 13, snap-fit ​​forming protrusion 14, snap-fit ​​forming cavity 15, outer panel lower forming protrusion 16, outer panel upper forming cavity 17, small hole forming groove 18, alignment hole forming groove 19, small hole forming shaft 20, alignment hole forming shaft 21, ejector pin fixing slide plate 22, inner panel ejector pin 23, outer panel ejector pin 24, hydraulic cylinder 25, lower mold cooling pipe assembly 26, upper mold cooling pipe assembly 27, 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, and interpreting them as any kind of additional limitation would be contrary to the spirit of this utility model.

Claims

1. A molding die for molding SMC car door panels, comprising a lower molding die (1) and an upper molding die (2), characterized in that, The upper mold (2) of the door panel is provided with a top plate (3), the lower mold (1) of the door panel is provided with an inner plate lower forming part (4) and an outer plate lower forming protrusion (5), the upper mold (2) of the door panel is provided with an inner plate upper forming part (6) and an outer plate upper forming recess (7), the inner plate lower forming part (4) and the inner plate upper forming part (6) are arranged opposite each other, the outer plate lower forming protrusion (5) and the outer plate upper forming recess (7) are arranged opposite each other, and the lower mold (1) of the door panel is provided with a synchronous ejection demolding structure (8) for the inner and outer plates below the lower mold (1).

2. The automotive SMC door panel molding die according to claim 1, characterized in that, The lower forming part (4) of the inner panel includes an inner panel main body forming protrusion (9) disposed in the lower mold (1) of the door panel molding. The inner panel main body forming protrusion (9) has a recessed cavity (10) on its inner side. The inner panel main body forming protrusion (9) and the recessed cavity (10) are respectively positioned and matched with the lower forming part (4) of the inner panel.

3. The automotive SMC door panel molding die according to claim 2, characterized in that, The upper forming part (6) of the inner plate includes an inner plate main body forming groove (11) and an alignment protrusion (12) disposed in the upper mold (2) of the door plate molding. The inner plate main body forming groove (11) and the inner plate main body forming protrusion (9) are directly opposite each other, and the alignment protrusion (12) and the recessed cavity (10) are directly opposite each other.

4. The automotive SMC door panel molding die according to claim 3, characterized in that, A snap-fit ​​structure (13) is provided between the inner plate main body forming protrusion (9) and the alignment protrusion (12).

5. The automotive SMC door panel molding die according to claim 4, characterized in that, The snap-fit ​​structure (13) includes a snap-fit ​​protrusion (14) disposed inside the inner plate main body forming protrusion (9), and the alignment protrusion (12) has a snap-fit ​​cavity (15). The snap-fit ​​protrusion (14) and the snap-fit ​​cavity (15) are positioned and matched in shape.

6. The automotive SMC door panel molding die according to claim 5, characterized in that, The lower forming protrusion (5) of the outer panel includes a lower forming protrusion (16) of the outer panel disposed in the lower mold (1) of the door panel molding, and the upper forming recess (7) of the outer panel includes an upper forming cavity (17) of the outer panel disposed in the upper mold (2) of the door panel molding. The lower forming protrusion (16) of the outer panel and the upper forming cavity (17) of the outer panel are positioned correspondingly and have matching shapes.

7. The automotive SMC door panel molding die according to claim 6, characterized in that, The lower part of the outer plate forming protrusion (16) has four small hole forming grooves (18) and one alignment hole forming groove (19). The upper part of the outer plate forming cavity (17) is provided with four small hole forming shafts (20) and one alignment hole forming shaft (21). The small hole forming shafts (20) are directly opposite to the small hole forming grooves (18), and the alignment hole forming shafts (21) are directly opposite to the alignment hole forming grooves (19).

8. The automotive SMC door panel molding die according to claim 6 or 7, characterized in that, The inner and outer panel synchronous ejection demolding structure (8) includes a push rod fixing slide plate (22) set below the door panel molding lower mold (1). The push rod fixing slide plate (22) is provided with a plurality of inner panel push rods (23) and outer panel push rods (24). The inner panel push rods (23) pass through the inner panel body forming protrusion (9), and the outer panel push rods (24) pass through the lower part of the outer panel forming protrusion (16).

9. The automotive SMC door panel molding die according to claim 8, characterized in that, Above the push rod fixing slide plate (22) are several hydraulic cylinders (25) for driving the push rod fixing slide plate (22) to move up and down.

10. The automotive SMC door panel molding die according to claim 1, characterized in that, The lower mold (1) of the door panel molding has a lower mold cooling pipe assembly (26), and the upper mold (2) of the door panel molding has an upper mold cooling pipe assembly (27).

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