Double-Layer Longitudinal Wrapping Mold for Cable Concentricity

The wrapping device is divided into multiple independent components: a guide hole for tape guidance, a pressing structure with pressing holes for localized compression, and a necking structure with a tapered hole for gradual shaping. This segmentation allows each component to perform its specific function without causing wrinkles - the guide hole ensures proper alignment, the pressing structure applies controlled pressure, and the necking structure gradually reduces diameter to eliminate deformations.

The insulating tape undergoes preliminary actions before final wrapping: it is first guided through the guide hole to ensure proper positioning, then pressed through the pressing holes to pre-compress and stabilize it, and finally passed through the tapered necking hole which gradually shapes it. These preliminary actions prevent wrinkles from forming during the wrapping process by preparing the tape in advance.

The pressing structure performs preliminary compression on the insulating tape through multiple pressing holes before the tape reaches the wrapping point. This pre-compression ensures the tape is sufficiently tight and adherent without requiring excessive pulling force during wrapping, thus achieving good covering effect while maintaining tape integrity and preventing wrinkles.

The pressing structure acts as an intermediary between the wrapping device and the insulating tape. It provides controlled compression force through the pressing holes, mediating the tension between loose wrapping (which prevents wrinkles) and tight wrapping (which ensures covering effect). This intermediary mechanism allows the tape to be held firmly without excessive pulling that would cause deformation.

The patent extracts the problematic foaming process entirely from the manufacturing method. Instead of using foaming materials that cannot meet distribution and yield standards, the invention uses solid insulating tapes wrapped around the conductor. This extraction eliminates the manufacturing precision issues associated with foaming while still achieving the goal of reducing dielectric constant for improved transmission performance.

The invention changes the material form parameter from foaming materials to solid insulating tapes. This parameter change allows for better control over physical and electrical properties. The insulating tapes can be selected with appropriate dielectric constants (such as PTFE, PP, PE, FEP, or PFA) to achieve low dielectric constant for high-frequency transmission while maintaining manufacturability and meeting distribution standards.