Forming die for Z-shaped negative angle shell composite part
By using the splicing design of inserts and connecting blocks and the frame-type demolding mechanism, the problem of demolding difficulties of Z-shaped negative angle shell composite parts is solved, realizing efficient and low-damage molding operation, and improving product quality and production efficiency.
Patent Information
- Application Number
- CN202511743511.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-25
- Publication Date
- 2026-01-02
AI Technical Summary
Existing molds for Z-shaped negative angle shell composite parts have problems such as difficulty in demolding, obvious mold line marks, easy damage, and short tooling service life.
The design employs a combination of inserts and connecting blocks, along with a frame-type demolding mechanism, to achieve synchronized demolding of the entire assembly. This reduces the number of inserts and uses wedge-shaped connections to tightly connect them, avoiding prying operations.
It significantly reduces parting line marks, avoids damage to parts, improves product qualification rate, reduces manual labor intensity, and shortens demolding time.
Smart Images
Figure CN121246097A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of carbon fiber composite part manufacturing, and particularly relates to a forming die for a Z-shaped negative-angle shell type composite part. BACKGROUND
[0002] In the fields of aerospace and automobile manufacturing, carbon fiber composite materials are widely used in the manufacturing of various load-bearing, assembly and sound-absorbing parts due to their excellent properties such as light weight, high strength and corrosion resistance. In order to meet functional requirements, some composite parts are designed as Z-shaped negative-angle shell structures. The Z-shaped negative-angle shell type composite part is designed as a negative-angle structure due to functional requirements, which brings high challenges to tooling design. The existing forming device adopts seven independent modules for splicing, and the product is taken out by pulling the edge blocks and prying them open during demolding. This not only causes the product to have joint line marks, demolding difficulty and damage, but also causes the joint line to increase with the increase of tooling use time, and finally causes the tooling to be scrapped. SUMMARY
[0003] In view of the above problems and deficiencies, the present application provides a forming die for a Z-shaped negative-angle shell type composite part.
[0004] To achieve the above-mentioned purpose, the present application provides a forming die for a Z-shaped negative-angle shell type composite part, which comprises a first insert, a second insert symmetrically arranged on both sides of the first insert, and at least one connecting block. The connecting block connects the first insert and the two second inserts, so that the outer shape of the first insert and the two second inserts after splicing is completely matched with the inner surface of the Z-shaped negative-angle shell type composite part. Preferably, a first connecting hole is formed through the bottom end of the first insert, a second connecting hole and a groove are formed in the bottom end of the second insert, the groove is located at one end of the second connecting hole, and the connecting block is provided with a boss matched with the groove at both ends.
[0005] Preferably, the inner side surface of the boss is wedge-shaped, and the wedge angles of the corresponding side surfaces of the groove are consistent.
[0006] Preferably, a demolding installation hole is formed in each of the opposite surfaces of the second insert, and the demolding installation hole is connected with a demolding mechanism.
[0007] Preferably, a demolding installation block is outwardly protruded on each of the opposite surfaces of the non-working part of the second insert, and a demolding installation hole is formed in the demolding installation block.
[0008] Preferably, the demolding mechanism is a frame structure comprising a connecting column connected with the demolding installation hole and a lifting ring.
[0009] The present application also provides a production method using the forming die for the Z-shaped negative-angle shell type composite part, which comprises the following steps. The convex of the connecting block is matched and installed with the groove of the second insert block, so that the first insert block and the two second insert blocks are spliced to form a complete Z-shaped negative angle forming cavity; The first insert block and the second insert block after splicing are fixed on the working platform; The carbon fiber composite material raw material is placed in the cavity, and the composite part is formed according to the preset process; The connecting column of the demolding mechanism is connected and fixed with the demolding mounting hole on the second insert block, and the lifting equipment is connected through the lifting ring; The lifting equipment is started to drive the whole demolding mechanism to rise, and the demolding mechanism drives the first insert block, the second insert block and the formed composite part to move synchronously through the connecting column, so that the composite part is separated from the working platform; After the composite part is completely separated from the working platform, the connecting block is disassembled to separate the first insert block and the second insert block, and the composite part is taken out.
[0010] Compared with the prior art, the beneficial effects of the present application are: The number of inserts is reduced, the wedge-shaped connection is close, the mold line mark is significantly reduced, the part damage caused by demolding prying is avoided, the qualified product rate is improved, the frame type integral demolding design does not need complex operation, the demolding time is shortened, and the labor intensity is reduced. BRIEF DESCRIPTION OF DRAWINGS
[0011] Figure 1 is an exploded structure diagram of the Z-shaped negative angle shell type composite part forming mold of the present application; Figure 2 is a structure schematic diagram of the second insert block in the Z-shaped negative angle shell type composite part forming mold of the present application; Figure 3 is a structure schematic diagram of the connecting block in the Z-shaped negative angle shell type composite part forming mold of the present application; Figure 4 is a structure schematic diagram of the Z-shaped negative angle shell type composite part forming mold of the present application; Figure 5 is a structure schematic diagram of the demolding mechanism in the Z-shaped negative angle shell type composite part forming mold of the present application. DETAILED DESCRIPTION
[0012] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor belong to the scope of protection of the present application.
[0013] Referring to Figure 1 The application provides a forming die for a Z-shaped negative angle shell composite part, comprising A first insert 1, a second insert 2 symmetrically arranged on both sides of the first insert 1, and at least one connecting block 5 connecting the first insert 1 and the two second inserts 2, so that the outer shape of the first insert 1 and the two second inserts 2 after splicing is completely matched with the inner surface of the Z-shaped negative angle shell composite part. Referring to Figures 2-3 A first connecting hole is formed through the bottom end of the first insert 1, a second connecting hole 3 and a groove 4 are formed at the bottom end of the second insert 2, the groove 4 is located at one end of the second connecting hole 3, and a boss 51 matched with the groove 4 is arranged at both ends of the connecting block 5. The inner side surface of the boss 51 is wedge-shaped, and the wedge angles of the corresponding side surfaces of the groove 4 are consistent. The number of the connecting blocks 5 is matched with the splicing requirement of the inserts.
[0014] Referring to Figure 4 A demolding installation hole 6 is formed on each of the opposite surfaces of the second insert 2, and the demolding installation hole 6 is connected with a demolding mechanism 7. A demolding installation block is outwardly protruded on each of the opposite surfaces of the non-working part of the second insert 2, and a demolding installation hole 6 is formed on the demolding installation block.
[0015] Referring to Figure 5 The demolding mechanism 7 is of a frame structure, comprising a connecting column 2 connected with the demolding installation hole 6 and a lifting ring 71.
[0016] The application further provides a production method using the forming die for the Z-shaped negative angle shell composite part, comprising the following steps. The boss 51 of the connecting block 5 is matched and installed with the groove 4 of the second insert 2, so that the first insert 1 and the two second inserts 2 are spliced to form a complete Z-shaped negative angle forming cavity. The spliced first insert 1 and second insert 2 are fixed on a working platform. Carbon fiber composite material raw materials are placed in the cavity, and the composite part is formed according to a preset process. The connecting column 2 of the demolding mechanism 7 is connected and fixed with the demolding installation hole 6 on the second insert 2, and the lifting ring 71 is connected with a lifting device. The lifting device is started to drive the demolding mechanism 7 to move upward as a whole, the demolding mechanism 7 drives the first insert 1, the second insert 2 and the formed composite part to move synchronously through the connecting column 2, so that the composite part is separated from the working platform. After the composite part is completely separated from the working platform, the connecting block 5 is disassembled to separate the first insert 1 and the second insert 2, and the composite part is taken out.
[0017] The above merely provides the preferred embodiments of the present application, and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the principles and technical scope of the present application shall fall into the scope of the present application.
Claims
1. A molding die for a Z-shaped negative angle shell composite part, characterized in that, It includes a first insert, two second inserts symmetrically arranged on both sides of the first insert, and at least one connecting block. The connecting block connects the first insert and the two second inserts, so that the shape of the first insert and the two second inserts after splicing is completely adapted to the inner surface of the Z-shaped negative angle shell composite part. The first insert has a first connecting hole through its bottom end, the second insert has a second connecting hole and a groove at its bottom end, the groove is located at one end of the second connecting hole, and the connecting block has bosses at both ends that match the groove.
2. The molding die for the Z-shaped negative angle shell composite part according to claim 1, characterized in that, The inner side of the boss is wedge-shaped, and the corresponding side of the groove has the same wedge angle.
3. The molding die for the Z-shaped negative angle shell composite part according to claim 1, characterized in that, The second insert has demolding mounting holes on both opposite sides, and the demolding mounting holes are connected to the demolding mechanism.
4. The molding die for the Z-shaped negative angle shell composite part according to claim 3, characterized in that, The second insert has a demolding mounting block protruding outward from its two opposite sides on the non-working part, and each demolding mounting block has a demolding mounting hole.
5. The molding die for the Z-shaped negative angle shell composite part according to claim 3, characterized in that, The demolding mechanism is a frame structure, which includes connecting columns and lifting rings that are connected to the demolding mounting holes.
6. A method for producing a molding die for a Z-shaped negative angle shell composite part, characterized in that, include: The boss of the connecting block is matched and installed with the groove of the second insert, so that the first insert and the two second inserts are spliced together to form a complete Z-shaped negative angle forming cavity; After the first and second inserts are assembled, they are fixed on the working platform; The carbon fiber composite material raw material is placed in the cavity, and the composite part is formed according to the preset process. Connect and fix the connecting column of the demolding mechanism to the demolding mounting hole on the second insert, and connect the lifting equipment through the lifting ring; The lifting equipment is activated to lift the demolding mechanism as a whole. The demolding mechanism drives the first insert, the second insert and the molded composite material to move synchronously through the connecting column, so as to separate the composite material from the working platform. After the composite material is completely separated from the working platform, the connecting block is disassembled to separate the first insert and the second insert, and the composite material is removed.