Rapid forming injection mold for automotive upholstery and process of rapid forming injection mold

Abstract

The invention discloses a rapid molding injection mold for automotive upholstery and a process thereof, and relates to the technical field of injection molds. The mold core structure matched with the turbofan structure of the automotive upholstery is arranged, the split type design is adopted, splicing of the mold core and step-by-step rotary demolding of the mold core and the turbofan structure can be achieved through rotary driving of the first rotary base and the second rotary base, the corresponding rotary bases are driven through the two motors correspondingly, and the mold core structure is more stable. The mold core is synchronously separated from each opening of the turbofan structure and gradually separated from the inner wall of each section of the opening step by step, and compared with an existing injection mold structure and an existing injection molding mode, the mold structure is simplified, use of driving equipment and a transmission structure is reduced, and the mode that multiple holes in the turbofan structure are synchronously demolded and the inner walls of the holes are demolded step by step is adopted; the demolding efficiency can be improved, the pulling effect on an injection molding part in the demolding period is greatly reduced, and particularly for an easily-deformed turbofan structure, high-precision and low-deformation injection molding can be achieved.

Description

Technical Field

[0001] This invention relates to the field of injection mold technology, specifically to a rapid prototyping injection mold for automotive interior parts and its process. Background Technology

[0002] Automotive interior parts, such as the housings of air conditioning vents, can be rapidly molded using injection molding. Air conditioning vent housings typically include a main panel with the air vents and blade supports installed within the vents for airflow guidance and support. Turbine / turbo fan type air conditioning vent housings (such as...) Figure 9 The structure shown is relatively complex. The internal turbine structure has several spokes that divide the air outlet into several openings. After injection molding and demolding, each mold core needs to be driven independently to separate it from the corresponding opening to achieve the demolding effect. This makes the mold core structure and the corresponding transmission drive structure complex, and the overall mold structure complex. When the mold core is demolded, it is directly separated from the spokes and other structures, resulting in high demolding resistance and obvious deformation of the injection molded parts. Summary of the Invention

[0003] The purpose of this invention is to solve the problems of complex structure, high cost and driving energy consumption, difficulty in maintenance and repair, large demolding resistance and obvious deformation of injection molded parts used for injection molding of automotive interior parts such as air conditioning vent shells, and to provide a rapid prototyping injection mold for automotive interior parts and its process.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a rapid prototyping injection mold for automotive interior parts, comprising:

[0005] The lower mold base has a first movable cavity inside, and the first rotating seat is rotatably mounted in the first movable cavity via the first rotating shaft of the docking motor.

[0006] The upper mold base has a molding cavity corresponding to the automotive interior parts on its opposite side to the lower mold base. It is connected to a driving device for driving the lower mold base and the upper mold base to open and close the mold. The second rotating seat is rotatably disposed in the second movable cavity of the upper mold base through the second rotating shaft of the docking motor. It is axially slidably connected to the second rotating shaft. The outer openings of the first movable cavity and the second movable cavity are provided with support members that match the shape of the turbine structure in the accessory opening on the automotive interior parts. The turbine structure divides the accessory opening into a first opening located in the center and on the outside, and several second openings. The support members are provided with a first insertion port and a second insertion port corresponding to the first opening and the second opening, respectively.

[0007] The inner mold core structure includes a first mold core and a second mold core respectively positioned at the center of the first rotating seat and the second rotating seat. The first mold core and the second mold core are respectively rotatably inserted into the first insertion port on the support member of the lower mold base and the upper mold base and both extend into the first opening.

[0008] The outer mold core structure includes several sets of third and fourth mold cores assembled by inclined plane structures. The third and fourth mold cores are respectively positioned on the outside of the first and second rotating seats by connecting blocks. They are movably inserted into the second sockets on the support members of the lower and upper mold seats. The third and fourth mold cores respectively abut against the partial inner wall of the second opening.

[0009] As a further description of the above technical solution:

[0010] The side wall of the second rotating shaft is provided with a number of axially extending guide ribs at intervals, and the second rotating shaft and the guide ribs are slidably inserted into the guide groove of the second rotating seat.

[0011] As a further description of the above technical solution:

[0012] The first push rod of the upper mold base connecting cylinder extends into the second movable cavity and abuts against the second rotating seat.

[0013] As a further description of the above technical solution:

[0014] The inclined structure includes a first inclined surface and a second inclined surface on the opposing surfaces of the third mold core and the fourth mold core.

[0015] As a further description of the above technical solution:

[0016] The third mold core is provided with a first forming surface and a second forming surface that respectively match the first radial straight surface and the first arc surface of the second opening. The fourth mold core is provided with a third forming surface and a fourth forming surface that respectively match the second radial straight surface and the second arc surface of the second opening.

[0017] As a further description of the above technical solution:

[0018] The first arc-shaped mating surface on the side of the third mold core is continuously connected to the fourth molding surface, and the second arc-shaped mating surface on the side of the fourth mold core is continuously connected to the second molding surface.

[0019] As a further description of the above technical solution:

[0020] An ejector platform is movably mounted in the first movable cavity via the second ejector rod of the docking cylinder. Several ejector pins are arranged on the ejector platform, which are tightly inserted into the through holes on the support of the lower mold base.

[0021] As a further description of the above technical solution:

[0022] The ejector pin slides through the clearance hole on the first rotating seat, and the clearance hole is an arc-shaped waist-shaped hole.

[0023] A rapid prototyping injection molding process for automotive interior parts, applied to the aforementioned rapid prototyping injection mold for automotive interior parts, includes the following steps:

[0024] S1. Mold Closure: The motor drives the first and second rotating shafts to rotate, thereby driving the first and second rotating seats to rotate respectively. The fourth mold core moves out of the upper mold seat from the second insertion port, which corresponds to the third mold core. The driving device controls the upper and lower mold seats to close the mold. At this time, the molding cavity is sealed, the first and second mold cores are joined together, and the third and fourth mold cores are joined together by the inclined structure and tightly inserted into the second insertion port on the support member of the lower and upper mold seats.

[0025] S2. Injection molding: Molten plastic is injected into the molding cavity and allowed to spread fully to the surfaces of the inner mold core structure and the outer mold core structure. After cooling and molding, the automotive interior part is formed.

[0026] S3, Step-by-step rotation demolding: The second rotating seat is driven to rotate, and under the guidance of the inclined structure, the fourth mold core is lifted. The second rotating seat slides adaptively along the second rotating axis. The second mold core and the fourth mold core separate from the inner walls of the first opening and the second opening, respectively. Then, the first rotating seat is driven to rotate, so that the first mold core rotates relative to the first opening. The third mold core slides in the second opening, so that the other part of the inner wall of the first opening and the second opening is demolded, that is, the demolding of the accessory opening and the inner wall of the turbine structure is completed.

[0027] S4. Mold opening: The upper mold base and the lower mold base are driven to separate, so that the automotive interior part is removed from the molding cavity and can be taken out.

[0028] In summary, due to the adoption of the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0029] The present invention relates to an injection mold for rapid prototyping of automotive interior parts and a mold core structure whose process settings are matched with the turbine structure of automotive interior parts. It adopts a split design, and by driving the rotation of the first and second rotating seats, the assembly of the mold core and its step-by-step rotational demolding with the turbine structure can be achieved. Two motors drive the corresponding rotating seats respectively, and the mold core synchronously detaches from each opening of the turbine structure and gradually detaches from each section of the inner wall of the opening step by step. Compared with existing injection mold structures and injection methods that involve independently driving several mold cores and performing demolding operations on the holes of the turbine structure of automotive interior parts one-to-one, this invention simplifies the mold structure, reduces the use of driving equipment and transmission structures, and improves demolding efficiency by demolding multiple holes on the turbine structure simultaneously and demolding the inner walls of the holes step by step. This significantly reduces the pulling effect on the injection molded part during demolding, especially for easily deformable turbine structures, enabling high-precision, low-deformation rapid injection molding. Attached Figure Description

[0030] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a front view of a rapid prototyping injection mold for automotive interior parts.

[0032] Figure 2 This is a partial front sectional view of an injection mold for rapid prototyping of automotive interior parts.

[0033] Figure 3 This is a diagram showing the usage state of the outer mold core structure in a rapid prototyping injection mold for automotive interior parts during closing and mold closure.

[0034] Figure 4 This is a diagram showing the usage state of the outer mold core structure in a rapid prototyping injection mold for automotive interior parts during separation and mold opening.

[0035] Figure 5 This is a schematic diagram of the structure of the second rotating shaft in a rapid prototyping injection mold for automotive interior parts.

[0036] Figure 6 This is a front sectional view of the first rotating seat, support component, and ejector pin in a rapid prototyping injection mold for automotive interior parts.

[0037] Figure 7 This is a partial top view of the lower mold base in a rapid prototyping injection mold for automotive interior parts.

[0038] Figure 8This is a top view of the first rotating seat in a rapid prototyping injection mold for automotive interior parts.

[0039] Figure 9 This is a schematic diagram of the structure of an automotive interior part produced by injection molding, corresponding to a rapid prototyping injection mold for automotive interior parts.

[0040] Legend:

[0041] 1. Lower mold base; 2. First movable cavity; 3. First rotary seat; 4. First rotating shaft; 5. Upper mold base; 6. Molding cavity; 7. Second movable cavity; 8. Second rotary seat; 9. Second rotating shaft; 10. Support component; 11. First insertion port; 12. Second insertion port; 13. First mold core; 14. Second mold core; 15. Outer mold core structure; 16. Third mold core; 17. Fourth mold core; 18. Connecting block; 19. First molding surface; 20. Second molding surface; 21. 22. Third forming surface; 23. Fourth forming surface; 24. Guide rib; 25. Guide groove; 26. First ejector pin; 27. First inclined surface; 28. Second inclined surface; 29. ​​First arc-shaped joining surface; 30. Ejector pin platform; 31. Second ejector pin; 32. Ejector pin; 33. Through hole; 34. Clearance hole; 100. Automotive interior part; 110. Part opening; 120. Turbine structure; 130. First opening; 140. Second opening. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0043] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0044] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0045] In the description of the embodiments of the present invention, it should be noted that the terms "upper" and "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention.

[0046] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection, an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0047] Example 1:

[0048] Please see Figure 1-9 This invention provides a technical solution: a rapid prototyping injection mold for automotive interior parts, comprising:

[0049] The lower mold base 1 has a first movable cavity 2 inside it, and the first rotating seat 3 is rotatably disposed in the first movable cavity 2 via the first rotating shaft 4 of the docking motor.

[0050] The upper mold base 5 has a molding cavity 6 corresponding to the automotive interior trim 100 on its opposite side to the lower mold base 1. It connects to a drive device for opening and closing the mold between the lower mold base 1 and the upper mold base 5. A second rotating seat 8 is rotatably mounted in the second movable cavity 7 of the upper mold base 5 via the second rotating shaft 9 of the connecting motor, and is axially slidably connected to the second rotating shaft 9. Support members 10 matching the shape of the turbine structure 120 within the accessory opening 110 on the automotive interior trim 100 are provided at the outer openings of both the first movable cavity 2 and the second movable cavity 7. The turbine structure 120 divides the accessory opening 110 into a first opening 130 located in the center and several second openings 140 located on the outer sides. The support members 10 are provided with first insertion ports 11 and second insertion ports 12 corresponding to the first opening 130 and the second opening 140, respectively. The workpiece to be injection molded by this injection mold specifically has the following characteristics: Figure 9 The turbofan structure 120 shown is used for automotive interior parts 100, such as the housing of an air conditioning vent.

[0051] The inner mold core structure includes a first mold core 13 and a second mold core 14 respectively positioned at the center of the first rotating seat 3 and the second rotating seat 8. The first mold core 13 and the second mold core 14 are respectively rotatably inserted into the first insertion port 11 on the support member 10 of the lower mold base 1 and the upper mold base 5 and both extend into the first opening 130.

[0052] The outer mold core structure 15 includes several sets of third mold cores 16 and fourth mold cores 17 assembled by inclined plane structures. The third mold cores 16 and fourth mold cores 17 are respectively positioned on the outside of the first rotating seat 3 and the second rotating seat 8 by connecting blocks 18. They are movably inserted into the second insertion port 12 on the support member 10 of the lower mold seat 1 and the upper mold seat 5. The third mold cores 16 and fourth mold cores 17 respectively abut against the partial inner wall of the second opening 140.

[0053] Based on the aforementioned mold core structure that matches the turbine structure 120 of the automotive interior part 100, it adopts a split design. By driving the rotation of the first rotating seat 3 and the second rotating seat 8, the assembly of the mold core and its step-by-step rotation and demolding with the turbine structure 120 can be realized. By driving the corresponding rotating seats with two motors respectively, the mold core synchronously detaches from each opening of the turbine structure 120 and gradually detaches from each section of the inner wall of the opening step by step. Compared with the existing injection mold structure and injection method that uses several mold cores to drive independently and perform demolding operations on the holes of the turbine structure of the automotive interior part one by one, this simplifies the mold structure and reduces the use of drive equipment and transmission structure. The method of synchronous demolding of multiple holes on the turbine structure and step-by-step demolding of the inner wall of the hole can improve demolding efficiency and greatly reduce the pulling effect on the injection molded part during demolding. Especially for the easily deformable turbine structure 120, high-precision and low-deformation injection molding can be achieved.

[0054] The side wall of the second rotating shaft 9 is provided with a plurality of axially extending guide ribs 23 at intervals. The second rotating shaft 9 and the guide ribs 23 are slidably inserted into the guide groove 24 of the second rotating seat 8. This improves the axial sliding connection and circumferential limiting structure of the second rotating shaft 9 and the guide ribs 23, and enhances the operational stability of the structure.

[0055] The inclined structure includes a first inclined surface 26 and a second inclined surface 27 on the opposing surfaces of the third mold core 16 and the fourth mold core 17, so as to realize the stable lifting and guiding effect of the inclined structure on the second rotating seat 8 when the two rotating seats rotate relative to each other, thereby improving the stability of mold opening and closing and demolding efficiency.

[0056] The third mold core 16 is provided with a first forming surface 19 and a second forming surface 20 that respectively match the first radial straight surface and the first arc-shaped surface of the second opening 140. The fourth mold core 17 is provided with a third forming surface 21 and a fourth forming surface 22 that respectively match the second radial straight surface and the second arc-shaped surface of the second opening 140. Wherein, as... Figure 3 , 4 It can be seen that the first molding surface 19 and the second molding surface 20 are the two sides that are blocked, and they respectively correspond to Figure 9 The second opening 140 has an adjacent radially extending straight surface and a circumferentially extending arcuate surface, while the third forming surface 21 and the fourth forming surface 22 correspond to... Figure 9 Inside the second opening 140, there is another straight surface and another arc surface that are respectively opposite to the first radial straight surface and the first arc surface. The two straight surfaces and the two arc surfaces together form the second opening 140. By rotating the third mold core 16 and the fourth mold core 17 relative to each other, the inner wall of the second opening 140 can be demolded in stages, which improves the efficiency of rapid injection molding and demolding quality of automotive interior parts.

[0057] The first arc-shaped mating surface 28 on the side of the third mold core 16 is continuously connected to the fourth forming surface 22, and the second arc-shaped mating surface 29 on the side of the fourth mold core 17 is continuously connected to the second forming surface 20. This improves the tightness of the mating of the two mold cores and the continuity of the surface connection.

[0058] Furthermore, in this embodiment, the plastic melt on the outer side can be injected into the molding cavity 6 through the conveying channels in the lower mold base 1 and the upper mold base 5; while the plastic melt at the inner and outer mold core structures and the inner side can be injected into the molding cavity 6 through the conveying channels in the above four types of mold cores and the docking rotating seat, thereby ensuring that the plastic melt is fully filled between each mold core, and thus ensuring the high-quality molding of the turbine structure 120. Specifically, one end of the conveying channel in the mold core structure extends to the corresponding molding surface, and the other end extends to the surface of the corresponding rotating seat and is connected to the plastic melt supply device through a special pipe fitting for conveying plastic melt.

[0059] A rapid prototyping injection molding process for automotive interior parts, applied to the aforementioned rapid prototyping injection mold for automotive interior parts, includes the following steps:

[0060] S1. Mold Closure: The motor drives the first rotating shaft 4 and the second rotating shaft 9 to rotate, thereby driving the first rotating seat 3 and the second rotating seat 8 to rotate respectively. The fourth mold core 17 moves out of the upper mold seat 5 through the second insertion port 12, and it corresponds vertically to the third mold core 16. The driving device controls the upper mold seat 5 and the lower mold seat 1 to close the mold. At this time, the molding cavity 6 is sealed. The first mold core 13 and the second mold core 14 are assembled. The third mold core 16 and the fourth mold core 17 are assembled together through the inclined structure and tightly inserted into the second insertion port 12 on the support member 10 of the lower mold seat 1 and the upper mold seat 5. The mold core is tightly closed by its own weight and external extrusion pressure.

[0061] S2, Injection molding: Molten plastic is injected into the molding cavity 6 and allowed to spread fully to the surfaces of the inner mold core structure and the outer mold core structure 15. After cooling and molding, the automotive interior part 100 is formed.

[0062] S3, Step-by-step rotation demolding: The second rotating seat 8 is driven to rotate. Under the guidance of the inclined structure, the fourth mold core 17 is lifted. The second rotating seat 8 slides adaptively along the second rotating shaft 9. The second mold core 14 and the fourth mold core 17 are separated from the inner walls of the first opening 130 and the second opening 140, respectively. Specifically, the second mold core 14 is separated from the upper half of the first opening 130, and the third molding surface 21 and the fourth molding surface 22 are separated from the corresponding inner walls of the second opening 140. Then, the first rotating seat 3 is driven to rotate, so that the first mold core 13 rotates relative to the first opening 130. The third mold core 16 slides in the second opening 140, so that the other part of the inner walls of the first opening 130 and the second opening 140 are demolded. That is, the first mold core 13 rotates relative to the lower half of the first opening 130 and demolds. The first molding surface 19 and the second molding surface 20 are separated from the corresponding inner walls of the second opening 140, thereby completing the demolding of the inner walls of the accessory opening 110 and the turbine structure 120.

[0063] S4. Mold opening: The upper mold base 5 and the lower mold base 1 are driven to separate, so that the automotive interior part 100 is separated from the molding cavity 6, and the automotive interior part 100 can be taken out.

[0064] Example 2:

[0065] Please see Figure 2 The figure shows a rapid prototyping injection mold for automotive interior parts provided in Embodiment 2 of the present invention. Based on the above embodiments, this embodiment further improves upon the following technical solution: the first ejector rod 25, which connects to the cylinder inside the upper mold base 5, extends into the second movable cavity 7 and abuts against the second rotating seat 8. The first ejector rod 25 allows the fourth mold core 17 to be tightly pressed onto the third mold core 16 during mold closing, ensuring proper mold core assembly. After injection molding and before demolding, the first ejector rod 25 is driven to disengage from the second rotating seat 8 before demolding, further improving the injection molding quality.

[0066] Example 3:

[0067] Please see Figure 2 , 6Figure 8 shows a rapid prototyping injection mold for automotive interior parts provided in Embodiment 3 of the present invention. Based on the above embodiments, this embodiment further improves upon the following technical solution: An ejector platform 30 is movably disposed within the first movable cavity 2 via a second ejector rod 31 connected to a docking cylinder. The ejector platform 30 is provided with several ejector pins 32 that are tightly inserted into the through holes 33 on the support member 10 of the lower mold base 1. After mold closing and before injection molding, the ejector pins 32 and through holes 33 are fully engaged, with their outer end faces flush. Then, molten plastic is injected into the molding cavity 6 for injection molding. After injection molding and mold core demolding and mold opening, the second ejector rod 31 pushes the ejector platform 30 upwards, causing the ejector pins 32 to simultaneously eject the formed turbine structure 120, thereby achieving separation and demolding of the automotive interior part 100 from the lower mold base 1, realizing fully automatic demolding and further achieving rapid prototyping.

[0068] The ejector pin 32 slides through the clearance hole 34 on the first rotating seat 3. The clearance hole 34 is an arc-shaped waist-shaped hole. The clearance hole 34 is designed to correspond with the ejector pin 32 so as to achieve relative non-interference sliding between the two when the first rotating seat 3 rotates, so that the multi-functional structure of the mold is tightly integrated and operates efficiently without interference.

[0069] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A rapid prototyping injection mold for automotive interior parts, characterized in that, include: The lower mold base has a first movable cavity inside, and the first rotating seat is rotatably mounted in the first movable cavity via the first rotating shaft of the docking motor. The upper mold base has a molding cavity corresponding to the automotive interior parts on its opposite side to the lower mold base. It is connected to a driving device for driving the lower mold base and the upper mold base to open and close the mold. The second rotating seat is rotatably disposed in the second movable cavity of the upper mold base through the second rotating shaft of the docking motor. It is axially slidably connected to the second rotating shaft. The outer openings of the first movable cavity and the second movable cavity are provided with support members that match the shape of the turbine structure in the accessory opening on the automotive interior parts. The turbine structure divides the accessory opening into a first opening located in the center and on the outside, and several second openings. The support members are provided with a first insertion port and a second insertion port corresponding to the first opening and the second opening, respectively. The inner mold core structure includes a first mold core and a second mold core respectively positioned at the center of the first rotating seat and the second rotating seat. The first mold core and the second mold core are respectively rotatably inserted into the first insertion port on the support member of the lower mold base and the upper mold base and both extend into the first opening. The outer mold core structure includes several sets of third and fourth mold cores assembled by inclined plane structures. The third and fourth mold cores are respectively positioned on the outside of the first and second rotating seats by connecting blocks. They are movably inserted into the second sockets on the support members of the lower and upper mold seats. The third and fourth mold cores respectively abut against the partial inner wall of the second opening.

2. The rapid prototyping injection mold for automotive interior parts according to claim 1, characterized in that, The side wall of the second rotating shaft is provided with a number of axially extending guide ribs at intervals, and the second rotating shaft and the guide ribs are slidably inserted into the guide groove of the second rotating seat.

3. The rapid prototyping injection mold for automotive interior parts according to claim 1, characterized in that, The first push rod of the upper mold base connecting cylinder extends into the second movable cavity and abuts against the second rotating seat.

4. The rapid prototyping injection mold for automotive interior parts according to claim 1, characterized in that, The inclined structure includes a first inclined surface and a second inclined surface on the opposing surfaces of the third mold core and the fourth mold core.

5. The rapid prototyping injection mold for automotive interior parts according to claim 1, characterized in that, The third mold core is provided with a first forming surface and a second forming surface that respectively match the first radial straight surface and the first arc surface of the second opening. The fourth mold core is provided with a third forming surface and a fourth forming surface that respectively match the second radial straight surface and the second arc surface of the second opening.

6. The rapid prototyping injection mold for automotive interior parts according to claim 5, characterized in that, The first arc-shaped mating surface on the side of the third mold core is continuously connected to the fourth molding surface, and the second arc-shaped mating surface on the side of the fourth mold core is continuously connected to the second molding surface.

7. The rapid prototyping injection mold for automotive interior parts according to claim 1, characterized in that, An ejector platform is movably mounted in the first movable cavity via the second ejector rod of the docking cylinder. Several ejector pins are arranged on the ejector platform, which are tightly inserted into the through holes on the support of the lower mold base.

8. The rapid prototyping injection mold for automotive interior parts according to claim 7, characterized in that, The ejector pin slides through the clearance hole on the first rotating seat, and the clearance hole is an arc-shaped waist-shaped hole.

9. A rapid prototyping injection molding process for automotive interior parts, applied to a rapid prototyping injection mold for automotive interior parts as described in claim 1, characterized in that, Includes the following steps: S1. Mold Closure: The motor drives the first and second rotating shafts to rotate, thereby driving the first and second rotating seats to rotate respectively. The fourth mold core moves out of the upper mold seat from the second insertion port, which corresponds to the third mold core. The driving device controls the upper and lower mold seats to close the mold. At this time, the molding cavity is sealed, the first and second mold cores are joined together, and the third and fourth mold cores are joined together by the inclined structure and tightly inserted into the second insertion port on the support member of the lower and upper mold seats. S2. Injection molding: Molten plastic is injected into the molding cavity and allowed to spread fully to the surfaces of the inner mold core structure and the outer mold core structure. After cooling and molding, the automotive interior part is formed. S3, Step-by-step rotation demolding: The second rotating seat is driven to rotate, and under the guidance of the inclined structure, the fourth mold core is lifted. The second rotating seat slides adaptively along the second rotating axis. The second mold core and the fourth mold core separate from the inner walls of the first opening and the second opening, respectively. Then, the first rotating seat is driven to rotate, so that the first mold core rotates relative to the first opening. The third mold core slides in the second opening, so that the other part of the inner wall of the first opening and the second opening is demolded, that is, the demolding of the accessory opening and the inner wall of the turbine structure is completed. S4. Mold opening: The upper mold base and the lower mold base are driven to separate, so that the automotive interior part is removed from the molding cavity and can be taken out.

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