Method and equipment for spraying and printing mark on surface of cable

Abstract

The invention relates to a method for spraying and printing a mark on the surface of a cable, comprising the step of spraying and printing the mark on the surface of the cable at the outlet of a mould by using ink in a melting state after extruding material of a material layer of the cable. The invention further provides equipment for praying and printing the mark on the surface of the cable by using the method. The equipment is provided with a set of hollow interlayer tool for protecting a spraying nozzle of the equipment. The spraying nozzle of the equipment is kept to work in the low temperature environment all the way because a dual-cooling method of circularly supplying cooling water in a cooling water trough of an extruding and molding machine in a hollow interlayer and accelerating air circulation is adopted. The mark sprayed and printed by using the method provided by the invention is hard to wipe out. The equipment has the advantage that the ink can be prevented from being dried to block the spraying nozzle.

Description

technical field [0001] The invention relates to a method for marking the surface of a cable and a printing device used for the method, in particular to a method for marking the surface of a soft elastic cable and a printing device for the method. Background technique [0002] The wire and cable standard stipulates that the abrasion resistance of the surface markings of wires and cables should meet the requirement of "wiping the wire core with degreased cotton or cloth soaked in water for 10 times, and the marking remains unchanged after wiping". However, with the development of society and the diversification of products, the requirements for products are getting higher and higher. Many household power cords and power cords for electrical equipment require that the marks on the surface of wires and cables should not only be clear, but also not be wiped off. At present, there are various special inks and ion treatments to solve the sign adhesion in the cable industry. [000...

AI Technical Summary

Problems solved by technology

For soft PVC, because its components contain various ester plasticizers, it is generally said that this kind of cable is "oily" and has strong ester precipitation. Ink can't solve the problem of not being wiped off

[0004] The wire and cable standard GB / T 6995 stipulates that the marking on the surface of the wire and cable should be embossed or spray printed, but the embossing method will affect the conformity of the structural layer of the cable. Most cables are applied by spray printing, soft PVC, PVC elastomer The marks on the surface of wires and cables are easily wiped off. While inheriting the excellent method of jet printing, it is necessary to solve the requirement of non-erasability

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