A carbon fiber car door inner panel and its molding die

By designing a mold with a motor-driven threaded rod and a heating and water-cooling system, the problems of long molding time and low strength in the deep groove area of ​​carbon fiber car door inner panels were solved, enabling rapid molding and high-quality production of carbon fiber car door inner panels.

CN224426592UActive Publication Date: 2026-06-30DELAPENG NEW MATERIAL TECH (CHANGZHOU) CO LTD

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
DELAPENG NEW MATERIAL TECH (CHANGZHOU) CO LTD
Filing Date
2025-08-07
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

The existing carbon fiber door inner panel molding process has problems such as excessive molding time, reduced strength in the deep groove area, uneven material stress distribution, and poor molding quality. In particular, cracks and deformations are prone to occur in the deep groove area.

Method used

The system uses a motor-driven threaded rod to move the mold, combined with heating wires and a water cooling system to achieve rapid shaping and setting. A cleaning mechanism ensures the mold is clean, preventing fiber accumulation and material damage caused by sliding.

Benefits of technology

It enables rapid prototyping of carbon fiber door inner panels, improves the strength and material uniformity of the deep groove area, reduces molding time and cost, and enhances molding quality and dimensional accuracy.

✦ Generated by Eureka AI based on patent content.

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Patent Text Reader

Abstract

This utility model relates to the field of car door mold technology, and discloses a carbon fiber car door inner panel and its molding mold, including a frame. A motor is fixedly connected to the top of the outer wall of the frame, and a threaded rod is fixedly connected to the output end of the motor. A threaded sleeve is threadedly connected to the outer wall of the threaded rod, and an upper mold is fixedly connected to the bottom of the outer wall of the threaded sleeve. A mold punch is fixedly connected to the bottom of the outer wall of the upper mold, and a heating wire is fixedly connected to the inner wall of the mold punch. A lower mold is fixedly connected to the inner side of the outer wall of the frame. In this utility model, the motor drives the threaded rod to rotate, realizing the up and down movement of the threaded sleeve. Simultaneously, the upper mold is fixedly connected to the bottom of the outer wall of the threaded sleeve, realizing the up and down movement of the upper mold. The mold punch is fixedly connected to the bottom of the outer wall of the upper mold, and the mold punch shapes the object.
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Description

Technical Field

[0001] This utility model relates to the field of car door mold technology, and in particular to a carbon fiber car door inner panel and its molding mold. Background Technology

[0002] In the automotive industry, with the increasing prominence of environmental and energy issues, lightweight design has become a key development trend. Currently, lightweighting of automotive interior door panels has progressed to the stage of using composite molding of two materials. Although this reduces weight without affecting strength, the processing usually requires two stages of molding: compression molding and injection molding, which is inefficient and costly. When attempting to use one-time injection molding molds, the complex curved shape of the carbon fiber substrate, which is a spatial curved structure, leads to excessive changes in the curvature of the sheet, making it prone to wrinkling, overlapping, and tearing, resulting in the scrapping of composite products. In terms of the existing carbon fiber interior door panel molding process, the traditional injection molding process is cumbersome, requiring a prepreg heating and shaping process, which not only requires additional molds and electricity but also reduces production efficiency and increases costs. For workpieces with deep grooves, the wall thickness and carbon fiber arrangement in the deep groove area are altered due to the molding principle, resulting in decreased strength, easy breakage, and poor production quality.

[0003] Traditional carbon fiber door inner panels and their molding dies suffer from altered wall thickness and carbon fiber arrangement in areas with deep grooves due to the molding principle. This leads to decreased strength in these areas, making them prone to breakage and severely impacting production quality. Furthermore, the problem of excessively long shaping and setting times remains unresolved in existing technologies. Current market solutions address this by precisely controlling the molding pressure in these areas to prevent uneven pressure distribution from causing abnormal wall thickness and carbon fiber arrangement in the deep grooves. Additionally, micro-textured structures are added to the mold cavity surface in the deep groove area to increase friction during molding, reducing fiber accumulation caused by sliding and ensuring uniform carbon fiber distribution. However, the problem of excessively long shaping and setting times persists. Prolonged shaping and setting may make the material more susceptible to external environmental factors during molding, leading to dimensional inaccuracies, decreased surface quality, uneven internal stress distribution, and an increased risk of deformation and cracking during later use. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a carbon fiber car door inner panel and its molding die, aiming to improve the problem of excessively long shaping and setting time for objects in the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a carbon fiber car door inner panel and its molding die, comprising a frame, a motor fixedly connected to the top of the outer wall of the frame, a threaded rod fixedly connected to the output end of the motor, a threaded sleeve rod threadedly connected to the outer wall of the threaded rod rod, an upper die fixedly connected to the bottom of the outer wall of the threaded sleeve rod, a die punch fixedly connected to the bottom of the outer wall of the upper die, a heating wire fixedly connected to the inner wall of the die punch, a lower die fixedly connected to the inner side of the outer wall of the frame, a die groove formed on the top of the outer wall of the lower die, a water-cooling plate fixedly connected to the inner wall of the lower die, a cooling pump fixedly connected to the inner wall of the water-cooling plate, circulation pipes fixedly connected to both ends of the outer wall of the cooling pump, and a cleaning mechanism fixedly connected to the front side of the outer wall of the frame, the cleaning mechanism being used to clean the device.

[0006] As a further description of the above technical solution:

[0007] The cleaning mechanism includes an air pump, the bottom of the outer wall of which is fixedly connected to the bottom of the inner wall of the frame. The top of the outer wall of the air pump is connected to a first delivery pipe, the inner side of the outer wall of the first delivery pipe is connected to a nozzle, the right side of the outer wall of the first delivery pipe is connected to a valve, the top of the outer wall of the frame is fixedly connected to a collection cabinet, the rear side of the outer wall of the collection cabinet is connected to a second delivery pipe, the middle of the outer wall of the second delivery pipe is connected to a suction pump, and the bottom of the outer wall of the suction pump is connected to a vacuum head.

[0008] As a further description of the above technical solution:

[0009] A cabinet door is fixedly connected to the left side of the outer wall of the collection cabinet, and a handle is fixedly connected to the right side of the outer wall of the cabinet door.

[0010] As a further description of the above technical solution:

[0011] A rotating shaft is rotatably connected to the left side of the outer wall of the collection cabinet, and a fixed frame is fixedly connected to the right side of the outer wall of the collection cabinet.

[0012] As a further description of the above technical solution:

[0013] The bottom of the inner wall of the collection cabinet is slidably connected to a slide bar, and a collection box is fixedly connected to the top of the outer wall of the slide bar.

[0014] As a further description of the above technical solution:

[0015] A buffer plate is fixedly connected to the top of the outer wall of the lower mold, and a limit groove is formed at the bottom of the outer wall of the upper mold.

[0016] As a further description of the above technical solution:

[0017] A buffer spring is fixedly connected to the top of the outer wall of the lower mold, and a limit post is fixedly connected to the top of the outer wall of the buffer spring.

[0018] As a further description of the above technical solution:

[0019] A threaded rod two is fixedly connected to the top of the inner wall of the frame, and a threaded sleeve rod two is threadedly connected to the outer wall of the threaded rod two. A protective shell is fixedly connected to the outer wall of the motor.

[0020] This utility model has the following beneficial effects:

[0021] 1. In this utility model, a motor drives a threaded rod to rotate, thereby moving the threaded sleeve rod up and down. Simultaneously, an upper mold is fixedly connected to the bottom of the outer wall of the threaded sleeve rod, enabling the upper mold to move up and down. A mold punch is fixedly connected to the bottom of the outer wall of the upper mold, shaping the object through the mold punch. A heating wire is fixedly connected to the inner wall of the upper mold to heat the mold punch for convenient shaping. A water-cooling plate is fixedly connected to the inner wall of the lower mold, and a cooling pump is fixedly connected to the inner wall of the water-cooling plate. Circulation pipes are connected to both ends of the outer wall of the cooling pump, cooling the lower mold through the circulation pipes to achieve rapid shaping of the object.

[0022] 2. In this utility model, gas is transported from the air pump through a conveying pipe and sprayed out by the nozzle to clean the outer walls of the upper and lower molds. The valve can be used to control the switch. Air is drawn in by the air pump and transported through the second conveying pipe to absorb the dust and impurities blown off by the nozzle. At the same time, a collection cabinet is connected to the top of the outer wall of the second conveying pipe. Attached Figure Description

[0023] Figure 1 This is a front perspective view of a carbon fiber car door inner panel and its molding die proposed in this utility model.

[0024] Figure 2 This is a partial structural diagram illustrating a carbon fiber car door inner panel and its molding die proposed in this utility model.

[0025] Figure 3 This is a partial structural exploded view of a carbon fiber car door inner panel and its molding die proposed in this utility model;

[0026] Figure 4 This is a partial structural exploded view of a carbon fiber car door inner panel and its molding die proposed in this utility model;

[0027] Figure 5 This is a partial structural exploded view of a carbon fiber car door inner panel and its molding die proposed in this utility model.

[0028] Legend:

[0029] 1. Frame; 2. Cleaning mechanism; 201. Air pump; 202. Valve; 203. Delivery pipe one; 204. Nozzle; 205. Delivery pipe two; 206. Suction pump; 207. Collection cabinet; 208. Vacuum head; 3. Motor; 4. Threaded rod one; 5. Threaded sleeve rod one; 6. Upper mold; 7. Lower mold; 8. Mold punch; 9. Heating wire; 10. Mold groove; 11. Water cooling plate; 12. Circulation pipe; 13. Cooling pump; 14. Cabinet door; 15. Handle; 16. Rotating shaft; 17. Collection box; 18. Sliding strip; 19. Fixing frame; 20. Buffer plate; 21. Limiting groove; 22. Limiting post; 23. Buffer spring; 24. Threaded rod two; 25. Threaded sleeve rod two; 26. Protective shell. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Please see the appendix Figure 1 - Appendix Figure 3 An embodiment of this utility model provides a carbon fiber car door inner panel and its molding die, including a frame 1. A motor 3 is fixedly connected to the top of the outer wall of the frame 1. A threaded rod 4 is fixedly connected to the output end of the motor 3. A threaded sleeve rod 5 is threadedly connected to the outer wall of the threaded rod 4. An upper mold 6 is fixedly connected to the bottom of the outer wall of the threaded sleeve rod 5. A mold punch 8 is fixedly connected to the bottom of the outer wall of the upper mold 6. A heating wire 9 is fixedly connected to the inner wall of the mold punch 8. A lower mold 7 is fixedly connected to the inner side of the outer wall of the frame 1. A mold groove 10 is opened on the top of the outer wall of the lower mold 7. A water-cooling plate 11 is fixedly connected to the inner wall of the lower mold 7. A cooling pump 13 is fixedly connected to the inner wall of the water-cooling plate 11. Circulation pipes 12 are fixedly connected to both ends of the outer wall of the cooling pump 13. A cleaning mechanism 2 is fixedly connected to the front side of the outer wall of the frame 1. The cleaning mechanism 2 is used to clean the device.

[0032] Specifically, a motor 3 is fixedly connected to the top of the outer wall of the frame 1. The output end of the motor 3 is connected to a threaded rod 4. The outer wall of the threaded rod 4 is tightly connected to a threaded sleeve rod 5 via a threaded connection. The bottom of the outer wall of the threaded sleeve rod 5 is fixedly connected to an upper mold 6. The bottom of the outer wall of the upper mold 6 is fixedly connected to a mold punch 8. The inner wall of the mold punch 8 is fixedly connected to a heating wire 9 for heating to ensure the required temperature during the molding process. In addition, a lower mold 7 is also fixedly installed on the inner side of the outer wall of the frame 1 via a fixed connection. A mold groove 10 is opened on the top of the outer wall of the lower mold 7 for placing carbon fiber material. A water-cooling plate 11 is fixedly connected to the inner wall of the lower mold 7. A cooling pump 13 is further fixedly connected to the inner wall of the water-cooling plate 11. The two ends of the outer wall of the cooling pump 13 are fixedly connected to circulation pipes 12 to form a complete cooling system to ensure temperature control during the molding process.

[0033] Please see the appendix Figure 2 - Appendix Figure 4 The cleaning mechanism 2 includes an air pump 201. The bottom of the outer wall of the air pump 201 is fixedly connected to the bottom of the inner wall of the frame 1. The top of the outer wall of the air pump 201 is connected to a first delivery pipe 203. The inner side of the outer wall of the first delivery pipe 203 is connected to a nozzle 204. The right side of the outer wall of the first delivery pipe 203 is connected to a valve 202. The top of the outer wall of the frame 1 is fixedly connected to a collection cabinet 207. The rear side of the outer wall of the collection cabinet 207 is connected to a second delivery pipe 205. The middle of the outer wall of the second delivery pipe 205 is connected to a suction pump 206. The bottom of the outer wall of the suction pump 206 is connected to a vacuum head 208.

[0034] Specifically, the cleaning mechanism 2 includes an air pump 201. The bottom of the outer wall of the air pump 201 is connected to the bottom of the inner wall of the frame 1 to ensure stability during operation. The top of the outer wall of the air pump 201 is connected to a delivery pipe 203. The inner side of the outer wall of the delivery pipe 203 is further connected to a nozzle 204, which can effectively direct airflow to the area to be cleaned. A valve 202 is also connected to the right side of the outer wall of the delivery pipe 203. The valve 202 is used to control the flow of air to adjust the air pump 201 as needed. In its working state, a collection cabinet 207 is connected to the top of the outer wall of the frame 1. The collection cabinet 207 is used to collect waste generated during the cleaning process. The rear side of the outer wall of the collection cabinet 207 is connected to a conveying pipe 205. The middle of the outer wall of the conveying pipe 205 is connected to an air pump 206. The function of the air pump 206 is to draw in air containing dust and deliver it to the collection cabinet 207. A suction head 208 is connected to the bottom of the outer wall of the air pump 206. The suction head 208 enables it to effectively suck up dust and debris from the outer wall of the device to ensure the cleaning effect.

[0035] Please see the appendix Figure 3 - Appendix Figure 5 A cabinet door 14 is fixedly connected to the left side of the outer wall of the collection cabinet 207. A handle 15 is fixedly connected to the right side of the outer wall of the cabinet door 14. A rotating shaft 16 is rotatably connected to the left side of the outer wall of the collection cabinet 207. A fixing frame 19 is fixedly connected to the right side of the outer wall of the collection cabinet 207. A slide bar 18 is slidably connected to the bottom of the inner wall of the collection cabinet 207. A collection box 17 is fixedly connected to the top of the outer wall of the slide bar 18.

[0036] Specifically, a cabinet door 14 is fixedly connected to the left side of the outer wall of the collection cabinet 207, and a handle 15 is fixedly connected to the right side of the outer wall of the cabinet door 14 for easy operation, so that users can easily open and close the cabinet door 14. At the same time, a rotating shaft 16 is rotatably connected to the left side of the outer wall of the collection cabinet 207 to ensure that the cabinet door 14 can rotate smoothly during opening and closing. In addition, a stable fixing frame 19 is fixedly connected to the right side of the outer wall of the collection cabinet 207 to support and fix other components. At the bottom of the inner wall of the collection cabinet 207, a smooth slide bar 18 is slidably connected to it through a sliding connection device. A collection box 17 for storing items is fixedly connected to the top of the outer wall of the slide bar 18, so that the collection box 17 can slide smoothly on the slide bar 18, making it convenient for users to retrieve and put away items.

[0037] Please see the appendix Figure 1 - Appendix Figure 3 A buffer plate 20 is fixedly connected to the top of the outer wall of the lower mold 7. A limit groove 21 is opened at the bottom of the outer wall of the upper mold 6. A buffer spring 23 is fixedly connected to the top of the outer wall of the lower mold 7. A limit post 22 is fixedly connected to the top of the outer wall of the buffer spring 23. A threaded rod 24 is fixedly connected to the top of the inner wall of the frame 1. A threaded sleeve rod 25 is threadedly connected to the outer wall of the threaded rod 24. A protective shell 26 is fixedly connected to the outer wall of the motor 3.

[0038] Specifically, a buffer plate 20 is fixedly connected to the top of the outer wall of the lower mold 7 to mitigate impact. This buffer plate 20 effectively absorbs and disperses pressure from above, protecting the mold from damage. Meanwhile, a limiting groove 21 is provided at the bottom of the outer wall of the upper mold 6 to restrict displacement. This limiting groove 21 ensures that the upper mold 6 can be accurately positioned during movement, preventing excessive movement. In addition to the buffer plate 20, a highly elastic buffer spring 23 is also fixedly connected to the top of the outer wall of the lower mold 7. This buffer spring 23 provides gentle support when the mold closes, reducing impact. A limiting post 22 for limiting is reliably fixed to the top of the outer wall. The limiting post 22 works in conjunction with the limiting groove 21 to ensure that the movement range of the mold is controlled. A threaded rod 24 is fixedly connected to the top of the inner wall of the frame 1. The outer wall of the threaded rod 24 is tightly fitted with the threaded sleeve rod 25 through a threaded connection, so that the threaded rod 24 can rotate within the threaded sleeve rod 25, thereby realizing height adjustment. In order to protect the internal structure of the motor 3, a sturdy protective shell 26 is fixedly connected to the outer wall of the motor 3. The protective shell 26 can effectively prevent external dust and impurities from entering the motor 3 and extend the service life of the motor 3.

[0039] Working principle: A motor 3 is fixedly connected to the top of the frame 1. A threaded rod 4 is fixedly connected to the output end of the motor 3. A threaded sleeve 5 is threadedly connected to the outer wall of the threaded rod 4. The motor 3 drives the threaded rod 4 to rotate, thereby moving the threaded sleeve 5 up and down. At the same time, an upper mold 6 is fixedly connected to the bottom of the outer wall of the threaded sleeve 5, thereby moving the upper mold 6 up and down. A mold punch 8 is fixedly connected to the bottom of the outer wall of the upper mold 6, thereby shaping the object. A heating wire 9 is fixedly connected to the inner wall of the upper mold 6 to heat the mold punch 8 for easy shaping. At the same time, a lower mold 7 is fixedly connected to the bottom of the outer wall of the frame 1. A water-cooling plate 11 is fixedly connected to the inner wall of the lower mold 7. A cooling pump 13 is fixedly connected to the inner wall of the water-cooling plate 11. Circulation pipes 12 are connected to both ends of the outer wall of the cooling pump 13, thereby cooling the lower mold 7 and achieving rapid shaping of the object. At the same time, the cooling pump 13 cools the circulation pipes 12, thereby achieving the function of circulating cooling.

[0040] A conveying pipe 203 is connected to the top of the outer wall of the air pump 201. A nozzle 204 is connected to the inner side of the outer wall of the conveying pipe 203. The air in the air pump 201 is conveyed through the conveying pipe 203 and sprayed out by the nozzle 204 to clean the outer walls of the upper mold 6 and the lower mold 7. The valve 202 can control the opening and closing of the pipe. At the same time, an air suction pump 206 is connected to the middle of the outer wall of the second conveying pipe 205. The air suction pump 206 sucks in air. A dust suction head 208 is connected to the bottom of the outer wall of the second conveying pipe 205. The air sucked in by the air suction pump 206 is conveyed through the second conveying pipe 205 to absorb the dust and impurities blown off by the nozzle 204. At the same time, a collection cabinet 207 is connected to the top of the outer wall of the second conveying pipe 205 to collect the impurities.

[0041] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A carbon fiber car door inner panel and its molding die, comprising a frame (1), characterized in that: A motor (3) is fixedly connected to the top of the outer wall of the frame (1). A threaded rod (4) is fixedly connected to the output end of the motor (3). A threaded sleeve (5) is threadedly connected to the outer wall of the threaded rod (4). An upper mold (6) is fixedly connected to the bottom of the outer wall of the threaded sleeve (5). A mold punch (8) is fixedly connected to the bottom of the outer wall of the upper mold (6). A heating wire (9) is fixedly connected to the inner wall of the mold punch (8). A lower mold (7) is fixedly connected to the inner side of the outer wall of the frame (1). A mold groove (10) is opened on the top of the outer wall of the lower mold (7). A water-cooled plate (11) is fixedly connected to the inner wall of the lower mold (7). A cooling pump (13) is fixedly connected to the inner wall of the water-cooled plate (11). Circulation pipes (12) are fixedly connected to both ends of the outer wall of the cooling pump (13). A cleaning mechanism (2) is fixedly connected to the front side of the outer wall of the frame (1). The cleaning mechanism (2) is used to clean the device.

2. The carbon fiber car door inner panel and its molding die according to claim 1, characterized in that: The cleaning mechanism (2) includes an air pump (201), the bottom of the outer wall of the air pump (201) is fixedly connected to the bottom of the inner wall of the frame (1), the top of the outer wall of the air pump (201) is connected to a first delivery pipe (203), the inner side of the outer wall of the first delivery pipe (203) is connected to a nozzle (204), the right side of the outer wall of the first delivery pipe (203) is connected to a valve (202), the top of the outer wall of the frame (1) is fixedly connected to a collection cabinet (207), the rear side of the outer wall of the collection cabinet (207) is connected to a second delivery pipe (205), the middle part of the outer wall of the second delivery pipe (205) is connected to a suction pump (206), and the bottom end of the outer wall of the suction pump (206) is connected to a vacuum head (208).

3. The carbon fiber car door inner panel and its molding die according to claim 2, characterized in that: The outer left side of the collection cabinet (207) is fixedly connected to a cabinet door (14), and the outer right side of the cabinet door (14) is fixedly connected to a handle (15).

4. The carbon fiber car door inner panel and its molding die according to claim 2, characterized in that: A rotating shaft (16) is rotatably connected to the left side of the outer wall of the collection cabinet (207), and a fixing frame (19) is fixedly connected to the right side of the outer wall of the collection cabinet (207).

5. The carbon fiber car door inner panel and its molding die according to claim 2, characterized in that: The bottom of the inner wall of the collection cabinet (207) is slidably connected to a slide bar (18), and the top of the outer wall of the slide bar (18) is fixedly connected to a collection box (17).

6. The carbon fiber car door inner panel and its molding die according to claim 1, characterized in that: A buffer plate (20) is fixedly connected to the top of the outer wall of the lower mold (7), and a limit groove (21) is opened at the bottom of the outer wall of the upper mold (6).

7. The carbon fiber car door inner panel and its molding die according to claim 1, characterized in that: A buffer spring (23) is fixedly connected to the top of the outer wall of the lower mold (7), and a limit post (22) is fixedly connected to the top of the outer wall of the buffer spring (23).

8. The carbon fiber car door inner panel and its molding die according to claim 1, characterized in that: The inner wall of the frame (1) is fixedly connected to a threaded rod two (24), the outer wall of the threaded rod two (24) is threadedly connected to a threaded sleeve rod two (25), and the outer wall of the motor (3) is fixedly connected to a protective shell (26).