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Novel antitheft tag magnetic material, production process thereof and acoustic magnetic antitheft tag

A technology of anti-theft labels and magnetic materials, which is applied in the direction of magnetic materials, magnetic objects, and record carriers used by machines, can solve the problems of changing the resonance frequency of the resonant sheet, increasing the difficulty of sheet material processing, and complicated manufacturing processes, etc., achieving low cost, The effect of simplifying the structural design and reducing the manufacturing cost

Active Publication Date: 2014-07-30
CHANGZHOU MEISI KETE ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially the semi-hard magnetic bias sheet must be fixed outside the cavity, and the thin sheet is accurately positioned and then sealed multiple times, which makes the manufacturing process complicated
This not only increases the difficulty of sheet processing, but also the uneven resonant sheet is easy to change the resonance frequency due to slight pressure

Method used

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  • Novel antitheft tag magnetic material, production process thereof and acoustic magnetic antitheft tag

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Include the following steps:

[0033] (1) hot rolling the cold-rolled steel plate to a thickness of 1 ± 0.2mm;

[0034] (2) The surface of the hot-rolled steel plate is coated with a heat-treated protective coating with a thickness of 0.5±0.05mm and containing 1% Nb; when the niobium content is high, the magnetic properties are reduced; when the niobium content is low, the final forming of the material is difficult. If batch production such as vacuum three-beam processing method or electrochemical method is adopted, the cost is high and it is not easy to produce in batches. If niobium is added during alloy smelting, it will have no effect on the magnetic properties due to the effect of grain refinement.

[0035] (3) heat-treating the steel plate coated with heat-treated protective paint at a temperature of 850°C to 900°C;

[0036] (4) Cold rolling to a thickness of 0.05±0.005mm;

[0037] (5) heat treatment at a temperature of 700°C to 750°C;

[0038] (6) cooling to ...

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Abstract

The invention relates to a novel antitheft tag magnetic material and a production process of the novel antitheft tag magnetic material, wherein the producing process comprises the steps of: adopting a cold-rolled steel plate and hot-rolling the cold-rolled steel plate to the thickness of 1+ / -0.2 mm; coating heat treatment protective paint which is 0.5+ / -0.05 mm in thickness and contains 1% of Nb on the surface of the hot-rolled steel plate; carrying out heat treatment on the hot-rolled steel plate which is coated with the heat treatment protective paint at the temperature of 850-900 DEG C; carrying out heat treatment at the temperature of 700-750 DEG C; and cooling. The invention also relates to an acoustic magnetic antitheft tag; a magnetic biasing piece is made from the novel antitheft tag magnetic material; and a resonant sheet is made from a microcrystal soft magnetic material. In the invention, stainless steel materials which are low in cost and can be produced in batch by stainless steel manufacture factories are taken as raw materials, so that the defect that the existing semi-hard magnetic materials are less in manufacture factory, long in ordering cycle and high in cost is solved; and as the novel antitheft tag magnetic material is a magnetic material with high coercive force and low residual magnetism, the structural design of the acoustic magnetic antitheft tag is simplified, and the manufacturing cost is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of commercial anti-theft labels, in particular to a novel magnetic material for anti-theft labels, a production process thereof, and an acoustomagnetic anti-theft label. Background technique [0002] Acoustomagnetic technology has been widely used in electronic object monitoring and anti-theft devices for more than 20 years. The US patent US4510489, which records the original invention, discloses that certain amorphous alloy material thin strips can emit light due to their high magnetic-elastic coupling coefficient. Strong resonance signals, and using this principle to successfully apply these materials to commercial anti-theft systems (acousto-magnetic systems), such as anti-theft systems in large supermarkets. The acousto-magnetic system mainly includes a detector, a decoder and a checker, and an anti-theft acousto-magnetic target. The detector widely used commercially is the Ultramax detector manufactured...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/147C22C38/44C21D8/12G08B13/24G06K19/067
Inventor 张超张彤
Owner CHANGZHOU MEISI KETE ELECTRONICS
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