CN100515258C - Interrupted tooth on edge of coin and souvenir badge and its printing method - Google Patents
Interrupted tooth on edge of coin and souvenir badge and its printing method Download PDFInfo
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- CN100515258C CN100515258C CNB2003101194631A CN200310119463A CN100515258C CN 100515258 C CN100515258 C CN 100515258C CN B2003101194631 A CNB2003101194631 A CN B2003101194631A CN 200310119463 A CN200310119463 A CN 200310119463A CN 100515258 C CN100515258 C CN 100515258C
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Abstract
The invention discloses an interrupted tooth on edge of coin and souvenir badge and its printing method, which comprises line cutting teeth and mold cover pressing, wherein the mold cover pressing process employs a split fabrication procedure which comprises, dividing the blank of the stamping die cover into an upper portion and a lower portion, keeping the die cover with special fixture, fastening the upper portion and the lower portion with fastening pieces.
Description
Technical field
The present invention relates to a kind of coin, commemorative coin, souvenir badge limit portion has half tooth, and printing method.
Background technology
Along with the progress of modern industrial technology, the especially progress of EDM Technology, coinage technology in various countries, the world today develops on inheriting tradition coinage technology basis brings up to a brand-new stage.Yet coin, the souvenir badge limit portion of present various countries is still the raw silk rings tooth or the light face does not have a tooth single-mode.Be interrupted manufacture difficulty and the technology content that half tooth can improve coin, souvenir badge at coin, souvenir badge limit portion seal, has the popular anti-counterfeiting performance that has strengthened coin, souvenir badge, and the sight and the collection that improve coin, souvenir badge, the meaning of having showed the progress of coin, souvenir badge manufacture craft.
It is the manufacturing technology with certain difficulty that coin, souvenir badge limit portion seal are interrupted half tooth, inquires about, retrieves according to us, and other mints of other countries and China also do not have similar products like.How on a die sleeve, process half tooth, this is the key point of processing.Because the silk tooth processing of impression die sleeve is to be processed by wire cutting machine tool.The processing of directly processing half raw silk rings tooth, half oblique silk tooth has in this way just become a difficult problem.
Summary of the invention
The purpose of this invention is to provide a kind of coin, souvenir badge limit portion is interrupted half tooth and printing method, the coin limit portion that makes is for clocklike or irregular and coding, first raw silk rings tooth or tiltedly silk tooth and second raw silk rings tooth or tiltedly a tooth is alternately.
Coin, souvenir badge limit portion is interrupted the printing method of half tooth, comprise the making of line cutting processing silk tooth and making ide sleeve blank, it is characterized in that the impression die sleeve has been taked the split method for processing: at first, with the impression die sleeve blank be divided into upper and lower two parts after, with securing member and special fixture die sleeve is kept motionless.The first step processes full raw silk rings tooth or complete tiltedly silk tooth with wire cutting machine tool, takes out die sleeve top then, stays the latter half; Second step is processing raw silk rings tooth or oblique silk tooth on the die sleeve the latter half that still is fixed on the anchor clamps again; After machining the upper and lower two parts of die sleeve are tightened together by the securing member connection again.Like this, a silk tooth that is made of two parts has up and down just formed and has been interrupted half tooth die sleeve.
Six kinds of basic silk profile of tooth morphotype covers of the coin limit portion that the inventive method provides, widenable to profile of tooth difference (as round tooth, stepped tooth, rake tooth etc.), the different polymorphic interruption half tooth die sleeve of tooth pitch (distance between silk tooth and thread tooth), for making coin, souvenir badge limit portion shape provide multiple choices, and be the popular anti-counterfeiting technology of a kind of important coin, adapt to slot machine and test the coin requirement automatically, can make full use of in the production of common coin circulation, circulation commemorative coin, souvenir badge.The half tooth technology of being interrupted has realized a breakthrough on China's coin, souvenir badge limit portion manufacturing technology, changed coin, the single present situation of souvenir badge limit portion manufacturing technology, and it is applicable to common continuous process units, and production efficiency can be guaranteed.
Description of drawings
Fig. 1 coin limit portion seal is interrupted half tooth pressure die cover schematic diagram
Fig. 2 is interrupted half tooth pressure die sleeve blank cutaway view
Fig. 3 is interrupted half tooth pressure die sleeve blank split top g cutaway view
Fig. 4 is interrupted half tooth pressure die sleeve blank split bottom h cutaway view
Fig. 5 raw silk rings tooth die sleeve cross sectional shape schematic diagram
Fig. 6 is silk tooth die sleeve cross sectional shape schematic diagram tiltedly
Fig. 7 is interrupted half helical teeth die sleeve and adds anchor clamps folder schematic diagram
Fig. 8 processes raw silk rings tooth die sleeve wire guiding nipple position view
Fig. 9 processes oblique silk tooth die sleeve wire guiding nipple position view
Figure 10 coin product limit portion seal is silk tooth angle degree schematic diagram tiltedly
Figure 11 principle of coordinate transformation figure
Figure 12 hyperbola origin cause of formation schematic diagram
Figure 13 coin impression position view
Figure 14 lower push rod processing skewed slot schematic diagram
Figure 15 B infrastructure product ejects schematic diagram
Figure 16 A infrastructure product ejects schematic diagram
Figure 17 die sleeve adds anchor clamps folder position view
4 kinds of profile of tooth schematic cross-sections of Figure 18
The specific embodiment
Can be made into as shown in fig. 1 half tooth die sleeve of interruption with the inventive method.Wherein a, c die sleeve be clocklike raw silk rings tooth and half raw silk rings tooth or tiltedly the silk tooth with half tiltedly the silk tooth is alternately; B, d die sleeve be irregular, coding, raw silk rings tooth and half raw silk rings tooth or tiltedly the silk tooth with half tiltedly a tooth is alternately; E, f die sleeve be clocklike or first raw silk rings tooth and second raw silk rings tooth of irregular and coding or first tiltedly silk tooth and second oblique tooth be alternately; L, m limit portion silk tooth all are straight or oblique half tooth.Eight kinds of profiles of tooth of being interrupted silk tooth in half tooth die sleeve listing among Fig. 1 are identical, and the silk space width also is identical.But, from false proof angle, can be on demand, change the combination of different silk odontoids and different space widths.For example, the silk tine length can be not more than half thick tooth of limit; The cross sectional shape of half tooth can be seen Figure 18 for triangle, trapezoidal, circular arc or rectangle etc.The arrangement mode of silk tooth also can be changed to: oblique or straight half tooth and full silk tooth are clocklike or alternately irregular.
The preparation method of being interrupted half tooth die sleeve is characterized in that having taked the split method for processing.At first, the blank 1 of impression die sleeve is cut apart, blank 1 as shown in Figure 2, visible alignment pin and bolt hole among Fig. 2.Wherein in the heart, the position has waney boss top 1g and bottom 1h respectively down.With wire cutting machine tool blank 1 crosscut is become upper and lower two parts, shown in following Fig. 3,4: after the blank 1 of impression die sleeve is cut into up and down two parts, use securing member, be connected with bolt as alignment pin and tighten together, need guarantee that die sleeve does not have the free degree, promptly two parts can not have any relatively moving or rotating up and down, therefore need special fixture 5 in processing silk tooth process, see Fig. 7.Process full raw silk rings tooth or complete tiltedly silk tooth (the total silk tooth of two parts up and down that so-called full raw silk rings tooth or complete tiltedly silk tooth are finger grips for the die sleeve after machining with wire cutting machine tool, the parameters of silk tooth is identical), unclamp fastening bolt after the completion of processing, take off the lower part of impression die sleeve, the part that will note especially should guaranteeing to be left is on special fixture 5, any moving or rotation can not be arranged, on remaining part, carry out secondary operations then, promptly between silk tooth that has processed and silk tooth, carry out raw silk rings tooth or the tiltedly processing of silk tooth again, guarantee to add the original position of line of cut in man-hour (molybdenum filament or copper wire) and last time when cutting full-depth tooth on same original position.The two parts up and down that will impress die sleeve after remainder machines are connected the fastening complete one that is combined into by alignment pin with bolt, like this, be interrupted half tooth die sleeve and just completed.Another kind of; Processing technology is to process respectively at two parts up and down of forming die sleeve, is separately fixed on the anchor clamps of equipment being interrupted half tooth die sleeve and two parts, takes off after a part of line cutting is wherein finished, and another part is fixed on the anchor clamps again.When equally, the original position that guarantee to add line of cut in man-hour (molybdenum filament or copper wire) is with last cutting in same original position.
When the inventive method was used for mass production, a used silk tooth die sleeve adopted all that " low-speed wire cutting line cutting processing " center " is processed.This numerically-controlled precise lathe has upper and lower two groups of seal wire covers, the track operation that the cutting copper cash passes upper and lower seal wire cover and stipulates according to procedure, discharge effect takes place between cutting copper cash and the workpiece in the running and carry out the galvanic corrosion cutting, so process the wire vent tooth in die sleeve.Yet raw silk rings tooth die sleeve is slightly different with the processing of oblique silk tooth die sleeve; Raw silk rings tooth die sleeve after the line cutting processing is two straight lines with crossing the axle center and the longitudinal profile that parallels to the axis, as shown in Figure 5; And the line of cut that the oblique silk tooth die sleeve after the line cutting processing is inclination rotates the rotary body that forms around axis, and it is two hyperbolas with crossing the axle center and the longitudinal profile that parallels to the axis, and principle is mentioned in the back, as shown in Figure 6.
Example 1: anchor clamps and equipment that the method for above-mentioned processing half tooth die sleeve is used are: anchor clamps are meant a circular steel plate that is used for fixing die sleeve, see Fig. 7.The steel plate middle part has a circular hole, diameter to be greater than the diameter of die sleeve silk to be processed tooth.Other two apertures are used for wearing the bolting die sleeve on the steel plate, and the position in hole is consistent with the bolt hole position on the die sleeve blank.Equipment is meant wire cutting machine tool.Upper and lower two groups of wire guiding nipples are arranged on wire cutting machine tool, and the projection of line on horizontal plane of seal wire cover overlaps up and down when processing raw silk rings tooth, sees Fig. 8.In process, wire guiding nipple carries out cutting processing according to the program track of being worked out to die sleeve up and down, forms the cylindrical straight-tooth die sleeve of section shown in raw silk rings tooth among Fig. 5.And tiltedly the processing of silk tooth die sleeve different with it be that the projection of the line of wire guiding nipple on horizontal plane do not overlap up and down, sees Fig. 9; Projection and the die sleeve axial line of wire guiding nipple line on horizontal plane formed an angle a up and down, and the angle of inclination of the main and oblique silk tooth of the size of this angle is chosen relevant, and the oblique silk of product tooth angle degree designs big more, and this angle a is big more, otherwise angle is more little, sees Figure 10.In oblique silk tooth process, this angle is constant all the time, and it serves as that the axle rotation forms with the die sleeve center line that so oblique silk tooth addendum line female surface can be regarded an addendum line as, and it has contained the addendum line of whole teeth.The oblique silk tooth of die sleeve is by the line of cut processing and fabricating of certain inclination angle (being made as α here temporarily), the angle of cut α of line of cut and die sleeve center line remains unchanged in process, it serves as that the axle rotation forms with the die sleeve center line that so oblique silk tooth addendum line female surface can be regarded some addendum lines as, and it has contained the addendum line of whole teeth.
(1) procedure of oblique silk tooth die sleeve
Form process with dextrorotation product narration hyperbola, definite mode of helical teeth direction is described, see Figure 10, in the orthogonal view of die sleeve, silk tooth upper end dextrad tilts, and cries dextrorotation, as follows Figure 11.
The silk tooth of establishment processing phase isodont overlaps procedure with upper and lower two groups of seal wires respectively.Before machining programming, the XOY coordinate plane of setting upper and lower two groups of seal wires cover is parallel to each other, the projection of the origin of coordinates in horizontal plane overlaps, and the coordinate that seal wire is down overlapped carries out coordinate transform, makes X1 axle, Y1 axle rotate counterclockwise the b angle around initial point O.
If tiltedly the programming diameter of silk tooth die sleeve is D, then its programming radius is R, R=D/2
Tiltedly the intended diameter of silk tooth coin is D
0, then its design radial is R
0, R
0=D
0/ 2
The coordinate line X1O1Y1 corner of following seal wire cover is a; Distance between the upper and lower seal wire cover is L;
The procedure starting point of last seal wire cover is A, and the A point is on Y-axis, and the subpoint of A point on following seal wire cover coordinate XOY is A2; It is A1 that the procedure that then descends seal wire to overlap opens initial point, and the A1 point is seen Figure 11 on the Y1 axle: so connect AA and AA
Tgb=AA/L formula (1)
The b angle promptly is line of cut and vertical direction, and promptly the angle of cut of die sleeve center line in helical teeth coin technological design process, should be set the b angle earlier, selected angle as required, and b angle difference, hyp shape are also slightly different.
Oblique silk tooth in the die sleeve is processed into by the three-dimensional secant of cutting sth. askew, if upper and lower two groups of seal wires cover is worked out identical tooth Profile Machining program respectively, programming diameter is d, obviously the oblique diameter d of a tooth coin
0＜d presses Figure 11, and the cut sth. askew mid point of secant of three-dimensional is M, and its subpoint on seal wire cover coordinate down is M1, and M1 point is on A1, A2 line and be the mid point of A1, A2 line, connection O1M1 line, then
So O1M1 ⊥ A1A2 RCOS (α/2)=R
0
R=R
0/ cos (α/2) formulas (2)
A1A2＝2M1A2 M1A2＝R
0tg(α/2)
A1A2＝2R
0tg(α/2) R
0＝D
0/2
A1A2＝D
0tg(α/2)
Following formula substitution formula (1) tgb=D
0Tg (α/2)/L
Tg (α/2)=Ltgb/D then
0
α=2arctg (Ltgb/D
0) formula (3)
(2) after procedure starts, last seal wire cover rotates the θ angle by the A point forward, because the procedure of upper and lower two groups of seal wires cover is identical, so the A1 point is forward rotation θ angle also, the a angle is constant, line of cut and vertical direction (die sleeve center line) angle of cut (b angle) is also constant, and procedure is proceeded, and machines up to the oblique silk of a die sleeve tooth.
According to the definition of analytic geometry, it is hyperbola that inclined line segment rotates its vertical section of formed rotary body around an axis, referring to Figure 12; Therefore, analyze theoretically, tiltedly the vertical section of silk tooth addendum line female surface profile should be hyperbola, and the vertical section of the raw silk rings tooth addendum line female surface profile that we were familiar with should be two straightways.
Have the oblique silk tooth coin of hyperboloid feature, slight intermediate recess phenomenon on the silk flank of tooth, may occur, if but the position that the base cake of needs impression is placed on more than the hyperbola summit just this phenomenon can not occur.
Be appreciated that because the difference of the relative position of seal wire cover up and down by top argumentation, the interruption half raw silk rings tooth that processes with wire cutting method and be interrupted half tiltedly during silk tooth die sleeve equally, the die sleeve geometry that processes is different.
When design and the oblique silk of processing tooth die sleeve, should take into full account the clamping height of processed die sleeve, because the mid point E position of line of cut is exactly hyperbola vertex position (being hyperbola minimum diameter position), as shown in figure 17: because C=D clamping height H difference will directly have influence on the difference of processing cross section, back hyperbola vertex position among the figure, that is to say be interrupted half tiltedly silk tooth die sleeve go up the difference of the radial height at diameter E place most, this point need be online be noted during cutting.Usually, the upper and lower lead seat of wire cutting machine tool is adjustable up and down within the specific limits, and exact numerical values recited can be set on wire cutting machine tool; Therefore, can change the H value, satisfy technological requirement by changing the distance (C+D) that goes up the lower wire seat.
Generally speaking, the thickness of selected hyp vertex position and product, die adjustable amplitude on equipment has relation, the hyperboloid vertex position is slightly different in the oblique silk of the product requirement of the different size tooth die sleeve, because after die sleeve thickness is determined, the thick position of the desired hyperboloid of base cake summit in die sleeve should be on the lower side, otherwise the base cake base cake may occur in the process of impression product the first half also is exposed at the outside of die sleeve.Because in the process of impression product, the base cake can not all or part ofly be in the hyperboloid summit below, otherwise, after impression is finished, be in its diameter of part below the hyperboloid summit greater than the diameter of hyperboloid vertex position, product can't be ejected from die sleeve by die, even eject, the silk tooth of product limit portion also will be destroyed.The position of hyperbola summit in die sleeve as can be seen from as shown in figure 13.So, choose the position of hyperbola summit in die sleeve, its objective is to make things convenient for coin, souvenir badge from die sleeve, to eject smoothly.
Owing to the particularity of being interrupted half oblique silk tooth product limit portion, need be slightly different during production with interruption half raw silk rings tooth product.Be example with horizontal 150 printing machines below, the simple description produced the tiltedly required anchor clamps of silk tooth product.
Since coin limit portion seal be interrupted half tiltedly a silk tooth be product in moulding process, the ditch slot space of continuous half helical teeth that will encircle in the die sleeve by flowing of metal is filled full, makes the limit portion of impression back product form continuously half oblique silk tooth.Different with general coin limit portion seal raw silk rings tooth technology is when tiltedly a silk tooth product withdraws from from die sleeve after impression is finished, must there be one to relatively rotate between liftout attachment and the oblique silk tooth die sleeve, deviate from smoothly from die sleeve with the assurance product, this also is the fundamental difference of coin limit portion seal raw silk rings tooth and half oblique tooth technology of coin limit portion seal.
Example 2: the coin limit portion seal tiltedly demoulding clamp structure of silk tooth product is divided into two kinds basically: a kind of B of being structure, die sleeve 8 maintains static, and allows lower push rod 2 do to push on the spiral moving, after impression is finished product is released.The feature of anchor clamps B structure is: circle is processed helicla flute on the lower push rod 2, sees Figure 14, and the rotation direction of silk tooth is identical on spiral fluted rotation direction and the product, such as, tiltedly a tooth spiral is to the right in product limit portion, and so, the spiral fluted rotation direction is also to the right on the lower push rod.When lower push rod 2 moves upward,, closely make lower push rod 2 do the rotation ascending motion along skewed slot owing in the helicla flute gag lever post 4 that is fixed on the equipment is arranged; See Figure 15.Another kind is the A structure, sees Figure 16.Like this, when product was ejected, die sleeve 8 was acted under the effect of the tangential component of ejecting force on the oblique silk tooth, produces helical rotation, thereby product is deviate from from die sleeve.
Know that from top elaboration first kind of demoulding anchor clamps is that die sleeve maintains static, push rod processing helicla flute in the liftout attachment, as shown in figure 15.Lower push rod 2 rises along helicla flute under the effect of gag lever post 4; Drive die 3, product 7, the oblique silk tooth direction rotation of die sleeve 8 edges down and rise, realization ejects smoothly.But the helicla flute in the push rod is not arbitrarily to process, and must meet following requirements:
Because the climb of push rod 2 equates with the rising helical pitch (distance) of product 7,
As can be known: tg α
1/ D
1=tg α
2/ D
2
α
1: product is silk tooth angle degree tiltedly
α
2: push rod processing angle of bevel
D
1: the product diameter
D
2: the push rod diameter
Because α
1, D
1, D
2For known, α then
2Can ask.
The advantage of this anchor clamps is:
1. simplicity of design is easy to process, and the duration is short, and cost is low, changes at former clamp structure to get final product Finish, can keep original clamp structure not to be destroyed;
2. be fit to be applied in the little equipment of impression position activity space;
3. be fit to continue to produce in enormous quantities;
4. eject the product mode and be by anchor clamps bottom push rod revolve that elevator is moving to be finished, be active mode;
5. because the spiral fluted machining accuracy improves and angle draws through accurate Calculation, thereby during reciprocating motion, precision is higher.
6. raw silk rings tooth product is with tiltedly the conversion of silk tooth production is slightly inconvenient.
Second kind of jig Design is passive type:
The die sleeve rotation, and push rod is motionless, as shown in figure 17.
The advantage of this anchor clamps is:
1. need not change liftout attachment, get final product with former liftout attachment;
2. be not subjected to processing variety, the tiltedly influence of silk tooth angle degree, each needs to change the processing that die sleeve can be finished all size product;
3. be applicable to any bulk article production (regardless of different kinds of);
4. raw silk rings tooth product is with tiltedly the conversion of silk tooth production is convenient;
5. as long as the equipment impression position useful space can be convenient to install die sleeve rolling clamp parts, just can use this anchor clamps;
6. owing to be passive rotation,, be to lean on the tiltedly drive of silk tooth to realize that a tooth may be subjected to damage to a certain degree owing to rotate for thin product or the low excessively product of hardness.
Claims (8)
1, a kind of coin or souvenir badge limit portion are interrupted half tooth, it is characterized in that: it is all or part of as limit portion silk tooth to be interrupted half tooth, and remainder is full silk tooth; Limit portion silk tooth has oblique silk tooth; The permutation and combination and the cross sectional shape of limit portion silk tooth have various ways.
2, coin according to claim 1 or souvenir badge limit portion are interrupted half tooth, it is characterized in that the arrangement mode of limit portion silk tooth is changed to:
(1) being interrupted half tooth is alternately clocklike with full silk tooth;
(2) being interrupted half tooth is alternately irregular with full silk tooth.
3, coin according to claim 1 or souvenir badge limit portion are interrupted half tooth, and the cross sectional shape that it is characterized in that limit portion silk tooth is triangle or trapezoidal or circular arc or rectangle.
4, a kind of coin or the souvenir badge limit portion preparation method of being interrupted half tooth, make the equipment that is interrupted half tooth die sleeve and adopt wire cutting machine tool, it is characterized in that die sleeve takes the split processing method: at first, the blank (1) of impression die sleeve is cut apart, wherein in the heart, down the position has waney boss top (1g) and bottom (1h) respectively; Blank (1) crosscut is become boss top (1g) and bottom (1h) two parts; Method a: tighten together with special fixture (5); Process full silk tooth for the die sleeve after machining with wire cutting machine tool, unclamp fastening bolt after the completion of processing, take off the lower part of impression die sleeve, guarantee that remaining part is motionless on special fixture, on remaining part, carry out secondary operations again, promptly between the silk tooth that has processed and silk tooth, carry out the processing of a tooth again, identical when the original position that guarantees to add the line of cut in man-hour is cut full tooth with the last time; The two parts up and down that will impress die sleeve after remainder machines are connected the fastening complete interruption half tooth die sleeve that is combined into by alignment pin with bolt.
5, coin according to claim 4 or the souvenir badge limit portion preparation method of being interrupted half tooth, it is characterized in that processing method b: operation at twice to die sleeve divided into two parts, boss top (1g) or bottom (1h) of the die sleeve blank that each processing earlier separates, and then the remaining part of processing, when guaranteeing the original position of corresponding die sleeve line of cut and another part chopping tooth on same original position; Then boss top (1g) and bottom (1h) tightened together, just constituted complete interruption half tooth die sleeve.
6, coin according to claim 4 or the souvenir badge limit portion preparation method of being interrupted half tooth is characterized in that there is a circular hole at the circular steel plate middle part of special fixture (5), and Circularhole diameter is greater than the diameter of the interruption half tooth die sleeve endoporus of silk tooth to be processed; The bolt hole that two Tight Mould Sleeve are arranged on the steel plate in addition, the position of bolt hole is consistent with the bolt hole position of being interrupted half tooth die sleeve.
7, the preparation method that coin according to claim 4 or souvenir badge limit portion are interrupted half tooth, it is characterized in that in the cylinder shell of stripper apparatus structure (A) spring (9) being arranged, be stuck in the concave station of the diameter top cover identical (10) with inner walls, top cover (10) contacts with interruption half tooth die sleeve (8) by plane bearing (6), be interrupted half tooth die sleeve (8) for the truncated cone-shaped on upright edge is arranged, its round platform all has plane bearing (6) up and down, it is upright along suitable for reading fair with the housing upper limb to be interrupted half tooth die sleeve (8), be interrupted half tooth die sleeve (8) internal diameter and be a bit larger tham product (7), the housing lower edge has gland (11) to seal.
8, coin according to claim 4 or the souvenir badge limit portion preparation method of being interrupted half tooth, it is characterized in that being interrupted on the round table-like outer wall of lower push rod (2) of half tooth product stripping apparatus structure (B) skewed slot is arranged, groove depth, width can hold the part of gag lever post (4), gag lever post (4) is fixed on lower push rod (2) peripheral device motionless, and the one end is in skewed slot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101194631A CN100515258C (en) | 2003-12-25 | 2003-12-25 | Interrupted tooth on edge of coin and souvenir badge and its printing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101194631A CN100515258C (en) | 2003-12-25 | 2003-12-25 | Interrupted tooth on edge of coin and souvenir badge and its printing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1631290A CN1631290A (en) | 2005-06-29 |
| CN100515258C true CN100515258C (en) | 2009-07-22 |
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|---|---|---|---|
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102974744B (en) * | 2011-09-05 | 2015-04-08 | 上海造币有限公司 | Anti-crumb type demolding structure for manufacturing periphery inclined threadlike teeth of trade coin |
| CN103504733B (en) * | 2012-06-26 | 2016-03-30 | （沈阳）中国印钞造币总公司沈阳造币技术研究所 | A kind of coin, souvenir badge edge groove roll the manufacture method of abnormity |
| CN103676474B (en) * | 2013-12-17 | 2016-09-21 | 南京理工大学 | The manufacture method that a kind of micro-embossing mould is split type |
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2003
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Non-Patent Citations (2)
| Title |
|---|
| 大面值硬币的防伪技术. 鲁国才.中国钱币，第71期. 2000 |
| 大面值硬币的防伪技术. 鲁国才.中国钱币，第71期. 2000 * |
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