CN2362337Y

CN2362337Y - Double-metal coin

Info

Publication number: CN2362337Y
Application number: CN 99223355
Authority: CN
Inventors: 王生龙; 宁应成; 董江; 李学飞; 孙凤全; 林兰英; 任军传; 赵丕信; 吴伟; 王福德; 晏景奎; 刘宪轻; 杨明志; 阚博文
Original assignee: SHENYANG MINT
Current assignee: SHENYANG MINT
Priority date: 1999-04-06
Filing date: 1999-04-06
Publication date: 2000-02-09
Anticipated expiration: 2009-04-06

Abstract

The utility model relates to a double-metal coin which comprises an outer ring and an inner core. The utility model has the key point that the thickness of the outer ring is equal to that of the inner core; the middle part of a cylindrical surface of the inner core is provided with a circumferential groove, and a metal in the position of the inner cylindrical face of the outer ring is embedded in the groove; the upper and the lower circumferential positions of the inner core are provided with transmitting platforms. In the production of the double-metal coin, the core and the ring are cut in set so that the raw material is saved by 25 % and the variety of the double-metal coin is increased. Because the inner core is provided with the groove and the transmitting platforms, in the process of impression, the metal of the outer ring is smoothly embedded in the groove so that the binding force of the core and the ring is 60 % as high as that in the prior art; the inner cylindrical face of the outer ring does not need to be machined so as to simplify the process and reduce the cost.

Description

A kind of bimetallic coin

The utility model is the new construction of a kind of bimetallic coin or commemorative coin (chapter).

Bimetallic coin, bimetallic souvenir badge (coin), medal etc. with two parts metal of unlike material through impressing chimeric making.Begin to occur bimetal coin from the eighties abroad, China begins to study from the nineties, is all doing a large amount of technical research and engineer testing aspect gold, silver commemorative coin and Huang, the copper-nickel alloy circulation coin.Existing bimetal coin all is the sheet metal strip that adopts two kinds of different-thickness, and stamping-out goes out outer shroud and inner core respectively, again both combinations is pressed into one.In order to make two combinations firm, typical structure is to make oncus on the cylinder of the garden of inner core, on the cylinder of the interior garden of outer shroud, make groove, and make the sheet metal strip of punching out inner core thicker, like this when impression, the excess metal of inner core can successfully flow in the groove of outer shroud, makes two parts in conjunction with firm.But the problem of this class formation and processing technology maximum is a waste material, especially make the sheet metal strip of outer shroud, the core material that falls behind the punching out outer shroud can only be used as waste disposal how much, so stock utilization has only the comprehensive utilization ratio of 40.55%, two kind of metal also to have only about 52%; Also more complicated of technology in addition, cost is than higher.

The purpose of this utility model provides a kind of new construction of bimetallic coin, its economical with materials, and two-part adhesion is big, and can increase the kind of bimetal coin.

The utility model is to realize like this, it comprises outer shroud and inner core, feature is outer shroud and inner core uniform thickness, be shaped on all grooves at inner core garden cylinder middle part, the metal displacer at the internal cause cylinder place of outer shroud is in this groove, the bonding crack place of inner core and outer shroud, promptly the outer garden of inner core upper and lower surface is shaped on transition platform on week.The all upper and lowers in the outer garden of outer shroud all are shaped on flange, are shaped on high density, low tooth depth and unequal the fracture of wire tooth in tooth heart angle and cylinder heart angle on the post of outer garden.

The utility model has the advantages that because outer shroud and inner core are exactly uniform thickness before impression, so they can adopt the mode punching out of cutting out a piece of cloth in a way with the minimum material to make two or more articles of clothing, the core material that promptly a kind of coin punching out outer shroud falls can have been saved raw material greatly as the base cake of another kind of coin inner core; Two kinds of outer shrouds that two kinds of metals are cut out a piece of cloth in a way with the minimum material to make two or more articles of clothing that punching out goes out and two kinds of inner cores intermesh supporting, can make two kinds of bimetal coins, have increased kind; Owing to be provided with all grooves on the cylinder of inner core garden, garden week is provided with transition platform, makes that the outer shroud metal can embed in the groove of inner core smoothly in the impression, adhesion is higher than prior art 60%, and owing to need not process on the interior garden cylinder of outer shroud, thereby technology is easy, with low cost.

Details of the present utility model provides by following examples and accompanying drawing thereof:

Fig. 1 is a kind of structural representation of the present utility model

Fig. 2 is Fig. 1 China and foreign countries loops compositions

Fig. 3 is core arrangement figure among Fig. 1

1-3 the utility model comprises outer shroud 1 with reference to the accompanying drawings, and its top and bottom of outer garden week all are shaped on flange 2.Also be shaped on the silk tooth 7 of the low tooth depth of high density outside on the cylinder of garden, this tooth 7 is interrupted, and promptly one section is shaped on a tooth, and one section is the face of cylinder, and the tooth heart angle α of silk tooth is greater than cylinder heart angle β.The cylinder middle part, garden of inner core 3 is shaped on a circle groove 5, and circumferential edges has flange 4 in the garden of last lower plane.Outer shroud and inner core are 3 annealed, after surface treatment and the rolling processing again through chimeric being integral of embossing machine impression, this moment, the metal of outer shroud 1 on two parts faying face embedded in the groove 5 of inner core 3, made both in conjunction with firmly.On finished product, two-partly leave transition platform 6 in conjunction with slit place, it is to form through impression on the basis of the flange 4 of inner core 3, its existence, make the part metals of having held inner core 3 in the moulding process, the deflection that has guaranteed the faying face upper groove reduces, and the gap between the core ring reduces, and adhesion increases.

It saves material more than 25% outer shroud to the utility model than prior art through evidence Also exceed about 60% than like product with the adhesion of inner core.

Claims

1, a kind of bimetallic coin, it comprises outer shroud and inner core, it is characterized in that: outer shroud and inner core uniform thickness, be shaped on all grooves at inner core garden cylinder middle part, the metal at cylinder place, garden is embedded in this groove in the outer shroud, the bonding crack place of inner core and outer shroud, promptly the outer garden of inner core upper and lower surface is shaped on transition platform on week.

2, bimetallic coin according to claim 1 is characterized in that all upper and lowers in outer garden of outer shroud all are shaped on flange.

3, bimetallic coin according to claim 1 is characterized in that being shaped on the post of outer garden high density, low tooth depth and unequal the fracture of wire tooth in tooth heart angle and cylinder heart angle.