A composite material double-layer joint integrated forming die
By designing an integrated mold for a double-layer composite material joint, and using threaded hole connection and surface fitting, the problem of inconvenient mold assembly and disassembly was solved, enabling multiple reuses of the mold and improving product strength, while ensuring molding accuracy.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI LANGDAN TECH GRP CO LTD
- Filing Date
- 2025-07-24
- Publication Date
- 2026-07-14
AI Technical Summary
The existing technology for integral molding of double-layer joints for composite material products is relatively complex, which makes it inconvenient to disassemble and assemble the mold and difficult to reuse it multiple times, affecting the product strength and connection reliability.
A composite material double-layer joint integral molding mold including upper and lower pressure plates, inclined pressure blocks, outer mold frame and multiple core mold components was designed. The mold is positioned and fixed by threaded hole connection and surface fitting. Metal material is used to improve strength, and integral molding is achieved by molding process.
This enables convenient assembly and disassembly of the mold and allows for multiple reuses, improving the strength and connection reliability of the product and ensuring molding accuracy.
Smart Images

Figure CN224489737U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of composite materials and process technology, specifically relating to an integrated molding mold for a composite material double-layer joint. Background Technology
[0002] Double-layer joints in composite materials are of great significance. Firstly, they enhance structural stability, as the double-layer design better withstands tensile and compressive forces. Secondly, they improve connection reliability and reduce the risk of joint failure. Furthermore, they help optimize the overall performance of composite material products, playing a crucial role in fields such as aerospace and high-end automotive manufacturing. Summary of the Invention
[0003] To address the complexity of integral molding technology for composite material products, this utility model provides an integral molding mold for a double-layer joint of composite materials.
[0004] This utility model provides a composite material double-layer joint integrated molding mold, including: upper and lower pressure plates, inclined pressure blocks, outer mold frame, outer mold assembly 1, outer mold assembly 2, outer mold assembly 3, core mold 1, core mold 2, and core mold 3.
[0005] The core mold 1, core mold 2 and core mold 3 are provided with threaded holes, and are connected to each other by screws after the composite material layup is completed.
[0006] The outer mold assembly 1, outer mold assembly 2, and outer mold assembly 3 are positioned and connected by the tenon surfaces of the core mold assembly 1, core mold assembly 2, and core mold assembly 3. The inclined pressure block is fitted with the core mold assembly 1, core mold assembly 2, core mold assembly 3, and outer mold frame through the profile. The outer mold frame is fitted with the upper and lower pressure plates through the profile.
[0007] In a preferred embodiment of this utility model, the lower pressure plate, the inclined pressure block, the outer mold frame, the outer mold assembly 1, the outer mold assembly 2, the outer mold assembly 3, the core mold 1, the core mold 2, and the core mold 3 are all made of metal.
[0008] Compared with the prior art, the present invention has the following beneficial effects:
[0009] The composite material double-layer joint integrated molding mold provided by this utility model is easy to disassemble and assemble, and the mold can be reused multiple times; the integrated molding can also improve the product strength. Attached Figure Description
[0010] Figure 1 This is a schematic diagram of the mold cross-section;
[0011] Figure 2Schematic diagram of outer mold assembly 1, outer mold assembly 2, outer mold assembly 3, core mold assembly 1, core mold assembly 2, and core mold assembly 3;
[0012] Figure 3 This is a schematic diagram of a composite material double-layer joint. Detailed Implementation
[0013] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.
[0014] The composite double-layer joint 1000 is made of carbon fiber prepreg. The integral molding mold used for molding includes: upper and lower pressure plates 100, inclined pressure block 200, outer mold frame 300, outer mold assembly 1 400, outer mold assembly 2 500, outer mold assembly 3 600, core mold 1 700, core mold 2 800, and core mold 3 900, which are integrally cured and molded by compression molding.
[0015] like Figure 2 Carbon fiber prepreg is laid on core mold component 1 (700), core mold component 2 (800), and core mold component 3 (900) respectively. After achieving the required number of layers and thickness, the mold components are assembled. Outer mold assembly components 1 (400), 2 (500), and 3 (600) are positioned using the tenon surfaces of the core mold components; the upper and lower pressure plates 100, the inclined pressure block 200, and the outer mold frame 300 are assembled using the profile positioning.
[0016] The upper and lower pressure plates 100 apply vertical force, pressing the inclined pressure block 200 into place through the molded surface. The outer mold frame 300 fits into the molded surface of the inclined pressure block 200, limiting the boundary. The outer mold assembly 1 component 400, outer mold assembly 2 component 500, outer mold assembly 3 component 600, core mold 1 component 700, core mold 2 component 800, and core mold 3 component 900 fit into the molded surface of the inclined pressure block 200, providing inward pressing force to press the product into place and ensure the accurate internal dimensions of the mold after mold closing.
[0017] Place the molding mold in a hot press for curing at a pressure of 90-110 bar, a curing temperature of 170℃-180℃, and a curing time of 3-4 hours.
[0018] The specific embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the invention. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.
Claims
1. A composite material double-layer joint integral molding mold, characterized in that, The components include upper and lower pressure plates (100), inclined pressure blocks (200), outer mold frame (300), outer mold assembly 1 (400), outer mold assembly 2 (500), outer mold assembly 3 (600), core mold assembly 1 (700), core mold assembly 2 (800), and core mold assembly 3 (900). Core mold assembly 1 (700), core mold assembly 2 (800), and core mold assembly 3 (900) are connected by positioning screws after the composite material layup is completed. Component (400), outer mold block 2 component (500), and outer mold block 3 component (600) are positioned and connected by the tenon surfaces of core mold 1 component (700), core mold 2 component (800), and core mold 3 component (900). The inclined pressure block (200) is fitted with the core mold 1 component (700), core mold 2 component (800), core mold 3 component (900), and outer mold frame (300) through surface fitting. The outer mold frame (300) is fitted with the upper and lower pressure plates (100) through surface fitting.
2. The composite material double-layer joint integral molding mold according to claim 1, characterized in that, The components including the upper and lower pressure plates (100), the inclined pressure block (200), the outer mold frame (300), the outer mold assembly 1 (400), the outer mold assembly 2 (500), the outer mold assembly 3 (600), the core mold 1 (700), the core mold 2 (800), and the core mold 3 (900) are all made of metal.