A mold for verifying defects in automotive door panels

Abstract

The present invention relates to the technical field of automobile manufacturing, and discloses a mold for verifying defects of automobile door panels, which includes a fixed mold fixing plate, a runner system, a runner plate, a fixed mold cavity plate, a moving mold cavity plate, a cooling system, a support plate, an ejection mechanism and an ejector pin fixing plate; the fixed mold fixing plate, the runner plate, the fixed mold cavity plate, the moving mold cavity plate, the support plate and the ejector pin fixing plate are sequentially connected from top to bottom; a forming surface is provided between the fixed mold cavity plate and the moving mold cavity plate, and the forming surface encloses a forming space; a leather grain area is provided on the forming surface, and a plurality of shrinkage rate marking structures are spacedly arranged at the edge of the forming surface; the runner system is arranged on the runner plate, and the runner system includes a plurality of gates respectively communicating with the forming space; the cooling system is arranged at the lower end of the moving mold cavity plate, and the ejection mechanism is arranged on the ejector pin fixing plate. The above-mentioned mold can adapt to the defect verification of more complex structures of door panels, thus enriching the verification types.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile manufacturing, and particularly to a mold for verifying defects of automobile door panels. Background Art

[0002] Automobile door panels, also known as automobile door trim panels or automobile door decorative panels, etc., are one of the essential components of an automobile door assembly. They are automobile components that are very easy to see or touch during the daily process of getting in and out of the car. The quality of them will directly affect the sensory experience of users, and their subjective feelings may even affect the recognition of the brand value of a vehicle model. Therefore, the importance of high-quality automobile door panel components for automobiles is self-evident, and it even concerns their brand image and value. Studying and solving the problems of automobile door panel defects has also become a research hotspot for automobile OEMs or manufacturers in the industry.

[0003] Currently, for the research on the quality problems of automobile door panel defects, usually before the formal design of the product, a verification model product is used as a substitute to verify in advance the possible design defects of the product, so as to carry out targeted design in the formal design stage and avoid the generation of similar design defects. However, the existing verification models are generally spline-level or template-level verification models, with a single verification type, and it is difficult to effectively verify defects for specific complex product structures. Summary of the Invention

[0004] The purpose of the present invention is to provide a mold for verifying defects of automobile door panels, which can adapt to the defect verification of more complex structures of door panels, thereby enriching the verification types, preventing or reducing various defects in the design process of door panels, and improving the overall design quality of automobile door panels.

[0005] To achieve the above purpose, the present invention provides a mold for verifying defects of automobile door panels, including a fixed mold fixing plate, a runner system, a runner plate, a fixed mold cavity plate, a movable mold cavity plate, a cooling system, a support plate, an ejection mechanism, and an ejector pin fixing plate; the fixed mold fixing plate, the runner plate, the fixed mold cavity plate, the movable mold cavity plate, the support plate, and the ejector pin fixing plate are connected in sequence from top to bottom;

[0006] A molding surface is provided between the fixed mold cavity plate and the movable mold cavity plate, and the molding surface encloses a molding space; a leather grain area is provided on the molding surface, and a plurality of shrinkage rate marking structures are arranged at intervals at the edge of the molding surface; the runner system is arranged on the runner plate, and the runner system includes a plurality of gates respectively communicating with the molding space; the cooling system is arranged at the lower end of the movable mold cavity plate, and the ejection mechanism is arranged on the ejector pin fixing plate.

[0007] Further, the thickness of the molding space is 1.0 mm - 3.0 mm.

[0008] Further, the number of the gates is 4, and the 4 gates are arranged in one-to-one correspondence with the 4 side edges of the runner plate.

[0009] Further, each of the gates is a needle valve gate.

[0010] Further, the runner system further includes hot runners respectively communicated with the gates.

[0011] Further, the shrinkage rate marking structure is triangular.

[0012] Further, the mold for verifying the defects of the automotive door panel is reduced in size in a certain proportion according to the size of the actual door panel forming mold.

[0013] Further, a speaker mesh hole forming structure, an inner door handle assembly hole forming structure, a map pocket forming structure, an armrest forming structure and a door panel mounting seat forming structure are arranged on the forming surface.

[0014] Further, the cooling system includes an independent cooling circulation waterway arranged relative to the speaker mesh hole forming structure.

[0015] Further, there are two support plates, and the two support plates are relatively arranged on both sides of the ejecting mechanism.

[0016] Compared with the prior art, the beneficial effects of a mold for verifying the defects of an automotive door panel provided by the above technical solution are as follows: by processing and forming a verification product of the door panel in the forming space and arranging a leather grain area on the forming surface, it is possible to verify the defect of poor replication of the appearance leather grain of the automotive door panel; through the shrinkage rate marking structure, the shrinkage rate and dimensional accuracy of the verified door panel can be detected; by arranging a plurality of gates, the position of the generation of the weld line defect on the surface of the verification product of the door panel can be targeted controlled by opening different gates and different opening sequences, so as to achieve the verification of the influence of the appearance state when the weld line is generated at different positions of the automotive door panel; by controlling the cooling system, the influence of different cooling states on the defects of the door panel product can be verified; it is possible to reproduce various typical appearance quality defects of the automotive door panel by combining the forming process control, so as to achieve the purpose of studying the causes or influencing factors of the relevant quality defects of the automotive door panel; compared with the existing spline-level or sample-level verification models, it can adapt to the defect verification of more complex structures of the door panel, enrich the verification types, so as to avoid relevant defect problems in the formal design or production process of the automotive door panel, and greatly improve the product design success rate and production qualification rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is an exploded view of the mold for verifying the defects of the automotive door panel according to an embodiment of the present invention;

[0018] Figure 2It is a perspective view of the mold for verifying defects of an automobile door panel according to an embodiment of the present invention;

[0019] Figure 3 It is a perspective view of the mold for verifying defects of an automobile door panel according to an embodiment of the present invention;

[0020] Figure 4 It is a schematic diagram of the shrinkage rate marking structure according to an embodiment of the present invention;

[0021] Figure 5 It is a schematic diagram of the structure of the moving mold cavity plate according to an embodiment of the present invention;

[0022] Figure 6 It is a schematic diagram of the structure of the cooling system according to an embodiment of the present invention.

[0023] Wherein, 1 - fixed mold fixing plate, 2 - runner system, 3 - runner plate, 4 - fixed mold cavity plate, 5 - moving mold cavity plate, 6 - cooling system, 61 - independent cooling circulation waterway, 7 - support plate, 8 - ejection mechanism, 9 - ejector pin fixing plate, 10 - molding space, 11 - shrinkage rate marking structure, 12 - speaker mesh molding structure, 13 - map pocket molding structure, 14 - inner door handle assembly hole molding structure, 15 - armrest molding structure, 16 - door panel mounting seat molding structure;

[0024] 21a - gate, 21b - gate, 21c - gate, 21d - gate; 22 - hot runner. Detailed implementation manners

[0025] The following combines the drawings and embodiments to further describe in detail the specific implementation manners of the present invention. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0026] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. in the present invention is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0027] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0028] As Figures 1 to 5 shown, the mold provided by the embodiment of the present invention for verifying defects of an automotive door panel includes a fixed mold fixing plate 1, a runner system 2, a runner plate 3, a fixed mold cavity plate 4, a moving mold cavity plate 5, a cooling system 6, a support plate 7, an ejection mechanism 8, and an ejector pin fixing plate 9; the fixed mold fixing plate 1, the runner plate 3, the fixed mold cavity plate 4, the moving mold cavity plate 5, the support plate 7, and the ejector pin fixing plate 9 are connected in sequence from top to bottom; a molding surface is provided between the fixed mold cavity plate 4 and the moving mold cavity plate 5, and the molding surface encloses a molding space 10; a leather grain area is provided on the molding surface, and a plurality of shrinkage rate marking structures 11 are provided at intervals at the edge of the molding surface; the runner system 2 is arranged on the runner plate 3, and the runner system 2 includes a plurality of gates respectively communicating with the molding space 10; the cooling system 6 is arranged at the lower end of the moving mold cavity plate 5, and the ejection mechanism 8 is arranged on the ejector pin fixing plate 9.

[0029] Based on the above solution, by processing and forming a verification product of the door panel in the molding space 10 and setting a leather grain area on the molding surface, it is possible to verify the defect of poor replication of the appearance leather grain of the automotive door panel. Through the shrinkage rate marking structure 11, the shrinkage rate and dimensional accuracy of the verified door panel can be detected; by setting a plurality of gates, the position of the generation of the weld line defect on the surface of the verification product of the door panel can be targeted controlled by opening different gates and different opening sequences, so as to achieve the verification of the influence of the appearance state when the weld line is generated at different positions on the automotive door panel; by controlling the cooling system 6, the influence of different cooling states on the defects of the door panel product can be verified; it is possible to reproduce various typical appearance quality defects of the automotive door panel in combination with the molding process control, so as to achieve the purpose of studying the causes or influencing factors of related quality defects of the automotive door panel; compared with the existing spline-level or sample-level verification models, it can adapt to the defect verification of more complex structures of the door panel, enrich the verification types, so as to avoid related defect problems in the formal design or production process of the automotive door panel, and greatly improve the product design success rate and production qualification rate.

[0030] Specifically, during use, the fixed mold clamping plate 1 is close to the injection molding machine side and remains stationary. The runner system 2 is used for the circulation of molten materials, the cooling system 6 is used for cooling the formed verification products, the support plate 7 is used to support the moving mold cavity plate 5, and the ejection mechanism 8 is used to actively eject the formed verification products. The leather grain area can simultaneously complete the replication of various typical leather grain features on the surface of the door panel. Various leather grain features are distributed in different surface areas of the verification mold according to verification needs, enabling the verification research on the appearance leather grain replication defects of automotive door panels.

[0031] In this embodiment, the molding space 10 is designed with a thin cavity structure. The thickness of the molding space 10 is 1.0 mm - 3.0 mm. This thickness refers to the thickness of the mold during molding, that is, the thickness of the product after molding, preferably 1.8 mm - 2.0 mm, to meet the verification of automotive door panels as thin-walled interior parts and be more targeted at verifying the injection molding defects of the current mainstream lightweight thin-walled materials for automobiles.

[0032] In this embodiment, as Figures 1 to 3 shown, the number of gates is 4. The 4 gates 21a, 21b, 21c, and 21d are arranged in one-to-one correspondence with the 4 side edges of the runner plate 3, and are used to verify the influence of feeding the molding space 10 from four different directions.

[0033] Specifically, by opening the 4 gates 21a, 21b, 21c, and 21d in different orders, the position where the weld line defect on the surface of the automotive door panel is generated can be targeted controlled, so as to verify the appearance state when the weld line is generated at different positions on the automotive door panel. It is also possible to verify the sink marks at different distances from the gate on the automotive door panel and the influence of opening different gates on the quality defects at the leather grain replication appearance by only opening one of the 4 gates 21a, 21b, 21c, and 21d.

[0034] In this embodiment, in order to achieve the independent opening and closing of each gate 21a, 21b, 21c, and 21d, each gate 21a, 21b, 21c, and 21d is a needle valve gate, which can independently control the opening and closing.

[0035] In this embodiment, as Figure 1 shown, in order to ensure the smooth flow of the melt between each gate 21a, 21b, 21c, and 21d, the runner system 2 further includes hot runners 22 respectively connected to each gate 21a, 21b, 21c, and 21d.

[0036] In this embodiment, as Figure 4 shown, the shrinkage rate marking structure 11 is triangular. Through the triangular shrinkage rate marking structure 11, it is convenient to measure and check the shrinkage rate of the product. A plurality of shrinkage rate marking structures 11 arranged at intervals around the edge of the molding surface can verify the shrinkage rate of the product in different directions.

[0037] In this embodiment, the mold for verifying the defects of the automobile door panel is reduced in size in a certain proportion according to the size of the actual door panel forming mold; specifically, considering economic practicality, the overall size of the mold for verifying the defects of the automobile door panel is reduced in a certain proportion in the length, width, and thickness directions compared with the normal automobile door panel mold. The reduction ratio can be selected according to the verification purpose of the product itself, and the reduction ratios in the three directions can be the same or different. It is preferably recommended that the reduction ratios in the three directions are the same, and are 1 / 2 or 2 / 3.

[0038] In this embodiment, as Figure 5 shown, a speaker mesh hole forming structure 12, an inner door handle assembly hole forming structure 14, a map pocket forming structure 13, an armrest forming structure 15, and a door panel mounting seat forming structure 16 are provided on the forming surface.

[0039] Specifically, in order to enrich the verification function, the mold for verifying the defects of the automobile door panel retains the typical features of the automobile door panel. When only the gate 21c near the speaker mesh hole forming structure 12 is opened, the filling of the speaker of the automobile door panel and the defective state of its flash appearance can be verified; when only the gate 21b near the map pocket forming structure 13 is opened, the color difference characteristics of the material weld line can be verified.

[0040] In this embodiment, as Figure 6 shown, for the complex speaker hole structure on the door panel, the cooling system 6 includes an independent cooling circulation water path 61 arranged relative to the speaker mesh hole forming structure 12. By separately controlling the circulation and closing of the independent cooling circulation water path 61, the influence of different cooling process conditions on the forming defects of the appearance of the speaker hole of the door panel can be fully verified.

[0041] In this embodiment, as Figures 1 to 4 shown, in order to enable the ejection mechanism 8 to move, there are two support plates 7. The two support plates 7 are relatively arranged on both sides of the ejection mechanism 8, and the ejection mechanism 8 is located between the two support plates 7. A space is reserved for the movement of the ejection mechanism 8 between the two support plates 7.

[0042] In summary, the embodiment of the present invention provides a mold for verifying the defects of an automobile door panel, which has the following beneficial effects:

[0043] 1. The overall design of the mold in this embodiment is reduced in size ratio compared with the real automobile door panel mold, but the product features of the automobile door panel in the mold cavity retain the normal appearance and typical feature structure of the automobile door panel. While playing the role of verifying various appearance defects, the design and development investment of the verification door panel mold can be greatly reduced;

[0044] 2. The mold of this embodiment adopts a multi-gate design, which can independently or combinatorially control the opening of each gate, and can meet the verification of various appearance quality defects of automotive door panels made of injection molding materials, such as surface shrinkage marks, flow marks, tiger skin patterns, weld lines, color differences, poor leather grain replication, etc.;

[0045] 3. It can be used to verify material properties such as the fluidity and shrinkage rate of automotive door panel materials;

[0046] 4. It can be used to verify the injection molding dimensional accuracy of automotive door panel products;

[0047] 5. Compared with the verification models of spline level or sample level with relatively single verification functions, the mold of this embodiment has richer verification functions, and combined with the specific door panel structure and shape, it is more targeted; compared with using real products as verification models, it has low cost investment, can implant more additional extended verification functions, and has good economic practicality.

[0048] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and substitutions can be made, and these improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A mold for verifying defects of automobile door panels, characterized in that, it includes a fixed mold fixing plate, a runner system, a runner plate, a fixed mold cavity plate, a moving mold cavity plate, a cooling system, a support plate, an ejection mechanism and an ejector pin fixing plate; the fixed mold fixing plate, the runner plate, the fixed mold cavity plate, the moving mold cavity plate, the support plate and the ejector pin fixing plate are connected in sequence from top to bottom; a forming surface is provided between the fixed mold cavity plate and the moving mold cavity plate, and the forming surface encloses a forming space; a leather grain area is provided on the forming surface, and a plurality of shrinkage rate marking structures are arranged at intervals at the edge of the forming surface; the runner system is arranged on the runner plate, and the runner system includes a plurality of gates respectively communicating with the forming space; the cooling system is arranged at the lower end of the moving mold cavity plate, and the ejection mechanism is arranged on the ejector pin fixing plate; the number of the gates is 4, and the 4 gates are arranged in one-to-one correspondence with the 4 side edges of the runner plate; each of the gates is a needle valve gate; the thickness of the forming space is 1.0 mm - 3.0 mm.

2. The mold for verifying defects of automobile door panels according to claim 1, characterized in that, the runner system further includes hot runners respectively communicating with each of the gates.

3. The mold for verifying defects of automobile door panels according to claim 1, characterized in that, the shrinkage rate marking structure is triangular.

4. The mold for verifying defects of automobile door panels according to claim 1, characterized in that, the mold for verifying defects of automobile door panels is reduced in proportion of 1 / 2 - 2 / 3 according to the size of the actual door panel forming mold.

5. The mold for verifying defects of automobile door panels according to claim 1, characterized in that, a speaker mesh hole forming structure, an inner door handle assembly hole forming structure, a map pocket forming structure, an armrest forming structure and a door panel mounting seat forming structure are provided on the forming surface.

6. The mold for verifying defects of automobile door panels according to claim 5, characterized in that, the cooling system includes an independent cooling circulation waterway arranged relative to the speaker mesh hole forming structure.

7. The mold for verifying defects of automobile door panels according to claim 1, characterized in that, there are two support plates, and the two support plates are relatively arranged on both sides of the ejection mechanism.

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