Pultrusion die
By designing a layered coating on the pultrusion die, the problem of insufficient lubrication performance of traditional mold release agents is solved, thereby achieving stability of mold lubrication performance and improvement of product quality, while reducing maintenance costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SICHUAN ZHOUYU HUAZHOU ARCHITECTURAL DESIGN CO LTD
- Filing Date
- 2025-04-18
- Publication Date
- 2026-07-17
AI Technical Summary
In the demolding process of existing pultrusion dies, the lubrication performance of traditional release agents is limited, making it difficult to meet the demolding requirements of complex molds and high-precision products. This leads to demolding difficulties, reduced product surface quality, and increased production costs and environmental impact.
A pultrusion die is designed with a layered coating structure, including an adhesive layer, an intermediate lubricating layer, and a wear-resistant lubricating layer. Through a progressively deferred protection mechanism, the lubrication performance and stability of the die are improved, frictional resistance is reduced, and the effective life of the coating is extended.
This ensures the stability of lubrication performance of the mold during wear, reduces the need for frequent coating replacement, improves the quality and production efficiency of composite material products, and reduces maintenance costs.
Smart Images
Figure CN224510177U_ABST
Abstract
Claims
1. A pultrusion die, characterized by, include: The mold body has a cavity; and The coating layer includes an adhesive layer, an intermediate lubricating layer, and a wear-resistant lubricating layer stacked together, and the adhesive layer covers the surface of the cavity.
2. The pultrusion die of claim 1, wherein, The mold body includes: An outer mold, comprising an upper outer mold and a lower outer mold joined together, wherein a first groove is formed on the side of the upper outer mold near the lower outer mold, and a second groove is formed on the side of the lower outer mold near the upper outer mold; and The inner mold includes an upper inner mold and a lower inner mold assembled together. The upper inner mold is embedded in the first groove, and the lower inner mold is embedded in the second groove. A first contouring groove is formed on the side of the upper inner mold near the lower inner mold, and a second contouring groove is formed on the side of the lower inner mold near the upper inner mold. The first contouring groove and the second contouring groove together form the cavity. The first contoured groove has a first flared section near one end of its opening, and the second contoured groove has a second flared section near one end of its opening. The first flared section and the second flared section correspond to each other, and the cross-sectional areas of both the first and second flared sections gradually increase from the inside of the groove to the outside. The walls of both the first and second contoured grooves are covered with the coating layer.
3. The pultrusion die of claim 2, wherein, The second contour groove near the second flared section has a demolding section, and the groove wall of the demolding section has a demolding groove.
4. The pultrusion die of claim 3, wherein, The demolding section has a plurality of demolding grooves evenly spaced along the demolding direction on its groove wall surface.
5. The pultrusion die of claim 2, wherein, The upper outer mold and the lower outer mold are connected and fixed by screws, the upper outer mold and the upper inner mold are connected and fixed by screws, and the lower outer mold and the lower inner mold are connected and fixed by screws.
6. The pultrusion die of any one of claims 1 to 5, wherein, The adhesive layer includes a first composite coating, which includes a silane coupling agent, nano-silica, and a metal complexing agent.
7. The pultrusion die of any one of claims 1 to 5, wherein, The intermediate lubricating layer includes a second composite coating, which comprises nano-silica and silicon carbide.
8. The pultrusion die of any one of claims 1 to 5, wherein, The wear-resistant lubricating layer includes a third composite coating, which comprises polytetrafluoroethylene and a fluorosilicone polymer.
9. The pultrusion die of claim 8, wherein, The third composite coating also includes a high-hardness filler, which is at least one of boron nitride and tungsten carbide.
10. The pultrusion die of any one of claims 1 to 5, wherein, The thickness of the coating layer is t, 50μm≤t≤200μm, wherein the thickness of the adhesive layer is , the thickness of the intermediate lubricating layer is , the thickness of the wear-resistant lubricating layer is , : : =1:3:1.