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Method for stamping interval half gear on edge of coin and souvenir badge

A commemorative badge and edge technology, applied to coins, medals, badges, etc., can solve problems such as the influence of semi-filament teeth, the inability to carry out mass production, and the difficulty of separate processing of mold sets, so as to achieve the effect of guaranteed production efficiency

Active Publication Date: 2009-07-22
CHINA BANKNOTE PRINTING & MINTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] On December 25, 2003, the applicant applied for "interrupted half-toothed edges of coins and medals and printing method", and the application number is 200310119463.1. However, since the die sets are manufactured in separate parts and processed separately, and then bolted together after processing, the strength of the die sets is not enough to carry out mass production, and it is difficult to process the die sets in separate parts, so the cost of production is high
In addition, the clamping device used in the imprinting process is a large spring, so that the force of the large spring is not uniform during the imprinting process, which will have a certain impact on the symmetry of the semi-filament teeth on the edge of the product.

Method used

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  • Method for stamping interval half gear on edge of coin and souvenir badge
  • Method for stamping interval half gear on edge of coin and souvenir badge
  • Method for stamping interval half gear on edge of coin and souvenir badge

Examples

Experimental program
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Effect test

Embodiment 1

[0033] A method for printing half-spaced teeth on the edge of coins and medals, comprising the following steps: a, processing the electrode into half-toothed electrodes includes: a1, making the electrode blank into two parts A and B; a2, using a clamp to Part A is fixed on the wire cutting machine tool, and then processed into straight and sparse teeth; a3. Fix part B on the wire cutting machine tool with a fixture, and then process it into straight dense teeth with the wire cutting machine tool. The number of dense teeth is twice the number of sparse teeth; a4. The two parts of electrode A and B are connected and fastened together by fasteners, and the wire electrode composed of the upper and lower parts and the fasteners together form a complete spaced straight half-tooth electrode; b. Processing mold cover blanks; c . Fix the complete spaced straight half-tooth electrode and the die cover blank on the electric discharge forming machine with a fixture, and then use the electr...

Embodiment 2

[0035] The method of printing half-spaced teeth on the side of coins and medals, wherein the electrodes are processed into spaced half-tooth electrodes, including: a11, making electrode blanks; a12, fixing the electrode blanks on the engraving machine, and then engraving them into left-handed spaced half-helical teeth Electrode; a13. Fasten the fasteners and spaced half-helical electrodes together to form a complete spaced half-helical electrode; process the mold cover blank, and fix the complete spaced half-helical electrode and the mold cover blank on the EDM On the forming machine, and then use the electric discharge forming machine to process the semi-oblique wire tooth mold sleeve. The EDM method is the C-axis rotary processing method; The printed product exits from the die set, and the imprinting device of the embossing fixture rotates relative to the helical tooth die set. The product that exits from the die set is a product with left-handed oblique wire teeth on the si...

Embodiment 3

[0037] The electrode in Example 1 is processed on a wire cutting machine tool with right-handed helical coarse teeth and helical dense teeth. Other steps are the same as in Example 1. Finally, the product with right-handed intermittent helical half teeth exits from the die set. The inclination of the wire teeth in this embodiment is 15 degrees.

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Abstract

The invention relates to a method for producing coins, in particular to a method in which half-tooths are printed on the edge of the coin and a medallion. This kind of method that is printed with interval half-tooth on coin, commemorative badge edge portion for reaching above-mentioned purpose, comprises the following steps: a, electrode is processed into interval half-tooth electrode; B, mold cover blank is processed; The semi-tooth electrode and the mold cover blank are fixed on the electric discharge forming machine, and then the wire tooth mold is processed by the electric discharge forming machine; d, through metal extrusion forming, the edge of the embossed product forms a spaced half-tooth; e 1. Exit the embossed product from the die set. The invention has the advantages that it is an important coin anti-counterfeiting technology for the public, adapts to the automatic coin checking requirements of coin slot machines, and can be fully utilized in the production of ordinary circulating coins, circulating commemorative coins and commemorative badges.

Description

[0001] Field [0002] The invention relates to a method for producing coins, in particular to a method in which half-tooths are printed on the sides of coins and medals with spaced half-tooths. Background technique [0003] With the progress of modern industrial technology, especially the progress of electric processing technology, the coinage technology of various countries in the world today has developed to a new stage on the basis of inheriting the traditional coinage technology. However, at present, the edges of coins and medals in various countries are still in the single mode of straight (oblique) wire teeth or smooth surface without wire teeth. Printing full teeth and half teeth on the edge of coins and medals can increase the difficulty and technical content of coins and medals, enhance the public anti-counterfeiting performance of coins and medals, and improve the appreciation and collection of coins and medals. The progressive significance of medal making technolog...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A44C21/00B21C25/02B21C25/10B23H1/00B23H1/04B23H9/00B23H7/02A44C3/00
Inventor 刘迪赖茂明张吉刚李胜强刘治旗胡云明
Owner CHINA BANKNOTE PRINTING & MINTING
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