![]() ![]() Due to the influence of external pressure, fusion of the thermoplastic fiber between the current layer and existing layers occurs. When the thermoplastic resin matrix reaches its melting point, the molecular chains move, which causes the resin matrix to change physically and to have a certain viscoelasticity. Thus, the heat source, which directly affects the placement effect and efficiency, is the key to the thermoplastic fiber placement process. The in situ curing technology adds curing heat sources during the preforming process. Thermoplastic fiber placement uses in situ curing technology, applying appropriate heat sources and pressure to the thermoplastic fibers to manufacture the component. They also have the advantages of good weldability, impact toughness, cyclability, and chemical resistance, making thermoplastic composites the research focus in the field of composite molding. Compared with thermosetting composite materials, the requirements for curing thermoplastic composite materials are lower. These shortcomings limit the application of thermosetting composite materials. However, during the molding process, the “autoclave curing” technology is limited by the size of the processing site and components, and it suffers from high energy and time consumption. The former are widely used as high-strength and lightweight materials in various fields such as aerospace, ships, and transportation. ![]() The materials used for automatic fiber placement are mainly resin-based fiber composite materials, which can be divided into thermosetting composite materials and thermoplastic composite materials according to the different resin matrix materials. Since fiber-reinforced composite materials have the advantages of light weight, high strength, high modulus, non-reflection of electromagnetic waves, and large design freedom, they have become the primary materials for aerospace components and large aircrafts. The academic research results will lay a theoretical foundation for the thermoplastic fiber placement. Compared with the temperature data from the simulation, the error was below 8%, which verified the correctness of the heat transfer model. The temperature data were collected by the online detection system. Combining the relationship between heating temperature and placement speed, when the first layer was laid, the placement process temperature could be quickly reached by low speed and high temperature. The influence rules of placement process parameters and mold initial temperature with respect to the temperature field in the first layer were obtained. Ansys Parametric Design Language (APDL) was used to generate the finite element model and simulate the transient process, not only to explore the influence of various process parameters on the temperature field, but also to build an online temperature field measurement system. Considering the heat transfer behavior of thermoplastic fiber polyether ether ketone (PEEK) as the research object, a mathematical model of heat transfer in the thermoplastic composite fiber placement with the relevant boundary conditions was established. TECAPEEK CF30 black is also available in a version suitable for medical applications (TECAPEEK MT CF30 black).Īs with all Ensinger PEEK materials, we can confirm that carbon reinforced TECAPEEK CF30 black meets the limitations imposed by RoHS Directive 2011/65/EU Restriction of Hazardous Substances in electrical equipment.Under the effect of different process parameters, the temperature field inside the thermoplastic fiber is very complex and directly affects the fusion quality between the resins. Carbon filled PEEK has also an excellent resistance to hydrolysis in boiling water and superheated steam.ĭue to its exceptional properties, TECAPEEK CF30 black is utilized in many of the most critical areas in general industry, as well as in the automotive, marine, nuclear, down hole oil well, electronics, and aerospace fields. The addition of carbon fibres also ensures a significantly higher level of heat conductivity which is also beneficial for increasing part life in sliding applications. Furthermore, carbon fibre composites tend to be less abrasive than glass fibres while simultaneously resulting in improved wear and friction properties. Carbon fibre reinforced PEEK demonstrates very high mechanical strength values, while exhibiting lower density than 30% glass fibre filled peek. Its carbon fibre reinforcement lends the material a high level of rigidity and creep strength. PEEK CF 30 is a 30% carbon filled PEEK material that is manufactured by Ensinger under the tradename TECAPEEK CF30 black. ![]()
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