Preparation method of bi-color or multi-color extruded PTFE (Polytetrafluoroethylene) insulated wire

Abstract

The invention discloses a preparation method of bi-color or multi-color extruded PTFE (Polytetrafluoroethylene) insulated wire. The preparation method is characterized by comprising the following steps of: adding raw materials, wherein the raw materials comprise a conductor and a base material, the base material is formed by mixing and matching PTFE, petroleum ether solvent or two or more water-based pigments, and the base material is pressed into bi-color or multi-color precast bars by a stainless steel slitting blade of a pre-pressing forming equipment; slowly pushing the precast bars into PTFE horizontal pushing host equipment through a precast bar sleeve; coating the surface of the conductor with the bi-color or multi-color base material by traction or piston pushing so as to form a bi-color or multi-color PTFE insulated wire; extruding the insulated wire into drying equipment through an oil-pressure driving piston; conveying the dried bi-color or multi-color PTFE insulated wire into a five-area sintering temperature detection area in sintering equipment; and forming the bi-color or multi-color PTFE insulated wire product after cooling the bi-color or multi-color PTFE insulated wire. The preparation method disclosed by the invention has the following advantages of improving the temperature resistance grade and saving the cost.

Description

technical field [0001] The invention also relates to a method for preparing a two-color or multi-color extruded PTFE insulated wire. Background technique [0002] Wire and cable signal access ports or special purposes are identified by color. For wire and cable signal access ports not greater than 9 or when there is no special requirement for multi-color lines, traditional single-color lines can handle it, but for wire and cable signal access ports greater than 9 or such as red-green double-color, red-green-yellow three-color When wires and the like represent special meanings, the traditional pre-press molding equipment for pushing PTFE insulation cannot meet the requirements of more than 9 colors or cannot produce multi-color wires. [0003] The access port device is distinguished by color or printed marking to realize the distinction of signal transmission and transmit the signal in time. In recent years, the method of using equipment to identify wire and cable products h...

AI Technical Summary

Problems solved by technology

[0004] At present, the method of distinguishing more than 9 power channels is to use a twin-screw extruder to produce a two-color line. Using a twin-screw extruder to produce a two-color line can only achieve two-color production of cables, and at most add some color distinctions, and the twin-screw extruder The insulated wire's temperature resistance level is not enough, and only PVC and PE materials can be extruded, which cannot meet the high temperature resistance requirements of aerospace at this stage.

The use of surface printing is to mark with Arabic numerals, but the firmness of the digital marks is not good, and the marks are easily damaged during the wire installation process

Obviously, it is not ideal to use them as cable color distinctions

Images