CN100368190C

CN100368190C - Method of making water print masterplate using three-dimensional design

Info

Publication number: CN100368190C
Application number: CNB2006100207553A
Authority: CN
Inventors: 李军; 骆富文; 王安云; 李挺; 季文祥
Original assignee: China Banknote Printing and Minting Corp
Current assignee: China Banknote Printing and Minting Group Co Ltd
Priority date: 2006-04-21
Filing date: 2006-04-21
Publication date: 2008-02-13
Anticipated expiration: 2026-04-21
Also published as: CN1830665A

Abstract

The present invention discloses a method for making watermark stencil by means of three-dimensional design, which relates to a method for making an anti-counterfeiting watermark stencil, particularly to a method for making a watermark stencil designed by three-dimensional technology and made by carving. In order to solve the problems of complicated procedure, high cost, high waste product rate and unfavorable environmental protection in the existing method containing the procedures of electroplating a reproduction and casting a cliche for making the watermark stencil by means of two-dimensional design, the present invention provides a method for making a watermark net pressing stencil directly applied to production, which uses the three-dimensional technology to design and make a watermark stereo pattern, makes a three-dimensional trimming stencil on a computer, controls a three-dimensional cutting feed of an automatic engraving machine to directly engrave and make a watermark gravure and a letterpress stencils on alloy copper or bearing steel. Compared with the prior art, the method has the advantages of simple work procedure, low waste product rate, low cost, environmental protection and long service life for the watermark stencil, and can be widely applied to anti-counterfeiting paper-making industry by means of watermarks.

Description

The method of making water print masterplate using three-dimensional design

Technical field

The present invention relates to anti-counterfei waterprint Stencil Production method, the method for particularly utilizing 3 D stereo art designs, engraving to make the watermark masterplate.

Background technology

Watermark is one of main means of present paper false proof; watermark in the paper is to rely on watermark intaglio plate and relief printing plate masterplate to overlap on copper mesh earlier to suppress watermark recovery; in paper, produce corresponding watermark recovery with this copper mesh at paper-making process then; wherein the present preparation method of watermark intaglio plate and relief printing plate masterplate is for as shown in Figure 1: obtain original pattern such as Freehandhand-drawing picture proof or photo; utilize CAD on two dimensional surface, to change into the height depth of watermark masterplate according to the step gray scale of watermark recovery; design and produce watermark recovery; to be converted into the machine language that the automation engraving machine can discern then with the watermark two-dimensional pattern design data that the step gray scale is expressed and be transferred to the automation engraving machine; carry out watermark masterplate engraving; the watermark masterplate of carving out turns over by electroplating technology and makes corresponding watermark intaglio plate and relief printing plate; because of the watermark version of electroplating out very thin; need carry out the watermark version again and irritate plumbous; produce the lead of watermark intaglio plate and relief printing plate and neutralize the net masterplate; electroplating reprint and irritating plumbous plate-making is to turn over system with the watermark master of carving out; the watermark recovery of watermark intaglio plate and relief printing plate is fitted like a glove; when both overlap the compacting copper mesh; can form as Fig. 3 or stenosis shown in Figure 4; through regular meeting copper mesh is crushed like this; the percent defective height; therefore every secondary watermark version is in order to satisfy instructions for use; must carry out artificial colour-separation drafting, easily cause the watermark recovery of every secondary masterplate after artificial colour-separation drafting inconsistent again.The auxiliary design of above-mentioned said two dimension is by the different height depths of expressing watermark recovery of grey step on two dimensional surface with making, the height depth zone of the feasible watermark masterplate of carving out can not smooth excessiveness, the watermark recovery of carving out is not a slick and sly shape as shown in Figure 3, but step shape as shown in Figure 5 easily causes wedge angle to crush copper mesh.As shown in Figure 3, existing method is recorded the watermark relief printing plate 1 and the watermark intaglio plate 2 of stereotype, and the watermark recovery on it fits like a glove, and there is stenosis in the copper mesh 4 that suppresses as shown in Figure 4, is easy to fracture; And the height depth of its watermark version of carving according to the gray scale of watermark recovery, be prone to the wedge angle 5 on the watermark recovery 3 as shown in Figure 5, the copper mesh that suppresses as shown in Figure 6, the danger that same existence easily makes copper mesh break, so in the existing method, must just can suppress satisfactory copper mesh as shown in Figure 8 through after the artificial colour-separation drafting as shown in Figure 7.Therefore, there is following shortcoming in the method that existing this two-dimensional design is made the watermark masterplate: the one, need through electroplating reprint, recording the watermark masterplate that stereotype and artificial colour-separation drafting just can be produced production usefulness, complex manufacturing, cycle are long, manually, Material Cost is big, and produces environomental pollution source; The 2nd, net masterplate weak strength is pressed in the watermark of plumbous system, and himself is easy to wear, makes the copper mesh watermark domain that suppresses as yielding fuzzy, and service life is short; The 3rd,, the pattern depth rough wedge angle just of expressing because of grey step easily makes the copper mesh broken string that suppresses, and causes the percent defective height.

Summary of the invention

The objective of the invention is to design and produce the above-mentioned shortcoming that the watermark template method exists in order to solve existing two-dimensional, for the user provides a kind of operation simple, be beneficial to environmental protection, the method for save and electroplate reprint, record stereotype, the three dimensional design of artificial colour-separation drafting operation being made long-life watermark masterplate.

The objective of the invention is to realize by following technical proposals:

The method of making water print masterplate using three-dimensional design, comprise and obtain original copy, CAD, engrave step, wherein the original copy of Huo Deing is photo or Freehandhand-drawing figure, and the engrave step is by the feed engrave of computer to automatic engraving machine output order control engraving machine, it is characterized in that:

A) the CAD step is 3 D stereo intaglio plate and the relief pattern of the original copy that obtains being designed on computers watermark by the Computerized three-dimensional graphics software;

B) after the CAD step, also has a Computer Simulation colour-separation drafting step, this step is the requirement according to watermark plate-making, watermark 3 D stereo intaglio plate and the relief pattern of designing overlapped the demonstration engraving on computers, cooperate degree according to its coincidence, extensibility in conjunction with copper mesh is made amendment, is replenished and adjust watermark 3 D stereo pattern, carry out the three-dimensional artificial colour-separation drafting on computers, make watermark 3 D stereo intaglio plate and relief printing plate overlap even that the back forms for suppressing the gap that copper mesh stayed;

C) the engrave step is, by computer the design data of watermark 3 D stereo intaglio plate and relief pattern is converted into the machine language that automatic engraving machine can be discerned, and controls its feed, carves out the 3 D stereo intaglio plate and the relief printing plate masterplate of watermark automatically.

Above-mentioned watermark 3 D stereo intaglio plate of carving out and relief printing plate masterplate are the metal material of high rigidity.

Above-mentioned metal material is high-carbon-chromium bearing steel or alloyed copper.

Above-mentioned metal material is a high-carbon-chromium bearing steel.

The watermark 3 D stereo intaglio plate of above-mentioned made and relief printing plate masterplate directly press the net masterplate to use as the watermark in producing.

The invention has the beneficial effects as follows that this method can make the watermark recovery virtual three-dimensional that designs show, check watermark stereoeffect before helping carving; Help calculating change in size and the cooperation and the radian relation of the embossing plate of verifying watermark recovery, reduced artificial colour-separation drafting operation, the rate of reducing the number of rejects and seconds and production cost; Metal watermark 3 D stereo intaglio plate of producing and relief printing plate masterplate can directly suppress copper mesh as the pressure net masterplate in producing, reduce the plating reprint, recorded stereotype and artificial colour-separation drafting operation, both reduce cost, eliminated the environmental pollution source again, also prolonged the service life of watermark masterplate.

Description of drawings

Fig. 1 is the process flow chart of prior art;

Fig. 2 is a process flow chart of the present invention;

Fig. 3 records the watermark intaglio plate of stereotype and the schematic diagram of watermark relief printing plate in the prior art;

Fig. 4 is the copper mesh watermark schematic diagram of watermark intaglio plate of the prior art and the compacting of watermark relief printing plate;

Fig. 5 is watermark intaglio plate and a watermark relief printing plate enlarged diagram of recording stereotype in the prior art;

Fig. 6 is the copper mesh watermark enlarged diagram of watermark intaglio plate of the prior art and the compacting of watermark relief printing plate;

Fig. 7 is the watermark intaglio plate after artificial colour-separation drafting and the schematic diagram of watermark relief printing plate in the prior art;

Fig. 8 is the copper mesh watermark schematic diagram of the watermark intaglio plate after artificial colour-separation drafting and the compacting of watermark relief printing plate in the prior art;

Fig. 9 is the watermark intaglio plate of engrave of the present invention and the schematic diagram of watermark relief printing plate;

Figure 10 is the watermark intaglio plate of engrave of the present invention and the copper mesh watermark schematic diagram of watermark relief printing plate compacting;

Number in the figure, the 1st, watermark relief printing plate, the 2nd, watermark intaglio plate, the 3rd, watermark recovery, the 4th, the copper mesh of compacting, the 5th, wedge angle.

The specific embodiment

The present invention is further illustrated below in conjunction with the drawings and specific embodiments.

Embodiment 1: as shown in Figure 2, obtain the original copy of the watermark recovery of Freehandhand-drawing, computer is advanced in scanning, earlier carry out preliminary treatment at this two-dimentional watermark recovery on computers with PHOTOSHOP software, mainly be to carry out some light and shade adjustment, Shadows Processing and blackening modification etc., based on this two-dimentional watermark recovery, carry out the auxiliary design of three-dimensional on computers with ArtCAM software and generate watermark 3 D stereo pattern then.In design process, indexs such as shrinkage factor after the height that the designer deposits according to paper pulp changes and l Water Paper page or leaf drying is anhydrated, generation can be used for producing and being reduced to the watermark 3 D stereo pattern of initial watermark recovery in paper, and based on this pattern, design watermark 3 D stereo intaglio plate and relief printing plate, the designer can this watermark 3 D stereo pattern of virtual on computers demonstration actual effect, the intaglio plate and the relief printing plate of watermark 3 D stereo are overlapped the demonstration engraving, cooperate degree according to its coincidence, indexs such as extensibility in conjunction with copper mesh are made amendment to watermark 3 D stereo pattern, replenish and adjust, carry out the three-dimensional artificial colour-separation drafting on computers, as shown in Figure 9, make watermark 3 D stereo intaglio plate and relief printing plate overlap even that the back forms for suppressing the gap that copper mesh stayed, be converted into the machine language that the automatic engraving machine of CNC can be discerned by computer again, control its feed, the automatic engraving machine of CNC is according to the three-dimensional feed of the data of three dimensional design, on Gcr15 bearing steel base substrate, carve out as shown in Figure 9 watermark intaglio plate 2 and watermark relief printing plate 1 masterplate, to carve good steel watermark intaglio plate 2 and watermark relief printing plate 1 then and carry out Quenching Treatment, directly carve with the three-D pattern feed, kept the edge line smooth excessiveness, because the Gcr15 steel is that a kind of alloy content is less, has good combination property, most widely used high-carbon-chromium bearing steel, after adding tempering, quenching has height and uniform hardness, good wearability, high contact fatigue property, can directly use as the pressure net masterplate in producing, reduced the plating reprint, record stereotype and artificial colour-separation drafting operation, directly with the watermark recovery of this concavo-convex steel watermark masterplate on the copper mesh that suppresses on the copper mesh as shown in figure 10, manufacture paper with pulp out with this copper mesh and to contain the anti-forge paper of watermark.

Also can directly carve in the said method, and needn't after having carved, carry out Quenching Treatment again through on the Gcr15 bearing steel of Quenching Treatment.

At present by existing watermark intaglio plate and relief printing plate Stencil Production method shown in Figure 1, fabrication cycle is about 18 days, by the method for making water print masterplate using three-dimensional design of the present invention, fabrication cycle can be controlled in about 6 days, and reduce made galvanograph, recorded stereotype, artificial colour-separation drafting operation; One pair of watermark steel is pressed and is at least more than 5 times of the concavo-convex masterplate of original filling lead water coining net the service life of the concavo-convex masterplate of net, about 200 pairs of originally annual industrial water die version, use method of the present invention only to need 20 pairs, the watermark masterplate cost of making by original method is about 3000 yuan/pairs, the watermark masterplate cost that adopts method of the present invention to make can be controlled in about 800 yuan/pairs, production cost significantly reduces, and year can be saved nearly 400,000 yuan of direct cost.

Embodiment 2: basic skills such as embodiment 1, watermark masterplate material is an alloyed copper.

Claims

1. the method for making water print masterplate using three-dimensional design, comprise and obtain original copy, CAD, engrave step, wherein the original copy of Huo Deing is photo or Freehandhand-drawing figure, the engrave step is by the feed engrave of computer to automatic engraving machine output order control engraving machine, it is characterized in that:

A. the CAD step is the original copy that obtains to be designed on computers the 3 D stereo intaglio plate and the relief pattern of watermark by the Computerized three-dimensional graphics software;

B. after the CAD step, also has a Computer Simulation colour-separation drafting step, this step is the requirement according to watermark plate-making, watermark 3 D stereo intaglio plate and the relief pattern of designing overlapped the demonstration engraving on computers, cooperate degree according to its coincidence, extensibility in conjunction with copper mesh is made amendment, is replenished and adjust watermark 3 D stereo pattern, carry out the three-dimensional artificial colour-separation drafting on computers, make watermark 3 D stereo intaglio plate and relief printing plate overlap even that the back forms for suppressing the gap that copper mesh stayed;

C. the engrave step is, by computer the design data of watermark 3 D stereo intaglio plate and relief pattern is converted into the machine language that automatic engraving machine can be discerned, and controls its feed, carves out the 3 D stereo intaglio plate and the relief printing plate masterplate of watermark automatically.

2. the method for making water print masterplate using three-dimensional design as claimed in claim 1, it is characterized in that: watermark 3 D stereo intaglio plate of carving out and relief printing plate masterplate are the metal material of high rigidity.

3. the method for making water print masterplate using three-dimensional design as claimed in claim 2, it is characterized in that: described metal material is a high-carbon-chromium bearing steel, or alloyed copper.

4. the method for making water print masterplate using three-dimensional design as claimed in claim 3, it is characterized in that: described metal material is a high-carbon-chromium bearing steel.

5. the method for making water print masterplate using three-dimensional design as claimed in claim 4 is characterized in that: watermark pressure half tone use during the direct conduct of the watermark 3 D stereo intaglio plate of made and relief printing plate masterplate is produced.