CN110712443A

CN110712443A - Concave-convex texture mold and manufacturing method and application thereof

Info

Publication number: CN110712443A
Application number: CN201910967963.1A
Authority: CN
Inventors: 魏基忠; 李挺; 王科; 方明
Original assignee: Zhongchao Great Wall Chancellor Precious Metals Ltd; CHENGDU BANKNOTE PRINTING Co Ltd
Current assignee: Zhongchao Great Wall Chancellor Precious Metals Ltd; CHENGDU BANKNOTE PRINTING Co Ltd
Priority date: 2019-10-12
Filing date: 2019-10-12
Publication date: 2020-01-21
Anticipated expiration: 2039-10-12
Also published as: CN110712443B

Abstract

The invention discloses a concave-convex texture mould and a manufacturing method and application thereof.A concave-convex texture is arranged on a molded surface of the concave-convex texture mould, and the molded surface is a flat surface or a regular curved surface or a concave-convex embossed surface; the concave-convex grains are formed by scores with different lengths, depths, widths, strip shapes, transition structures and bottom structures according to a set form and position relationship; the manufacturing method of the concave-convex texture mold comprises the following steps: step S1: designing a dotted line pattern and carrying out three-dimensional relief modeling; step S2: processing a molded surface on the mold according to the three-dimensional relief model; step S3: mechanically engraving a plurality of nicks with incompletely identical length, depth, width, strip sample, transition structure and bottom structure on the molded surface by a mechanical engraving machine according to a selected engraving knife and set parameters of the point-line pattern; and obtaining the concave-convex texture mold. The invention combines the relief modeling and the engraving intaglio, so that the relief point line pattern formed by embossing on the surface of the metal product is finer and more three-dimensional.

Description

Concave-convex texture mold and manufacturing method and application thereof

Technical Field

The invention relates to the technical field of gravure molds, in particular to a concave-convex texture mold and a manufacturing method and application thereof.

Background

On traditional money, intaglio patterns formed by intaglio printing are often adopted to represent main images such as characters, landscapes, buildings and the like, and the intaglio patterns are important components and anti-counterfeiting means in the money.

Intaglio printing, namely engraving an intaglio plate, then coating ink on the surface of the intaglio plate, and transferring the ink in the intaglio plate to a bearing object, so that the ink on the bearing object forms an intaglio pattern to reproduce the pattern on the intaglio plate. Gravure printing is essentially a flat printing method, and the printed intaglio patterns represent three-dimensional spaces only by the thickness and shape and position relationship of dots and lines.

In the imprinting, a mold having a three-dimensional relief pattern is first prepared, and then the object is processed by a compression method under high pressure, so that the three-dimensional relief pattern on the molding surface of the mold is transferred to a pressure-receiving material. Embossing is essentially a three-dimensional modeling method that uses concave and convex contoured surfaces to form a relief image and relies on perspective to represent three-dimensional spatial relationships.

The embossed pattern obtained by embossing has obvious embossed feeling compared with the intaglio pattern obtained by intaglio printing, and the intaglio pattern obtained by intaglio printing is finer than the embossed pattern obtained by embossing and can hide anti-counterfeiting information.

In order to better improve the artistic expressive force of metal products such as metal foils, coins, stamps and the like, two technologies of carving gravure design and relief mould manufacturing need to be fused. Embossing the concave-convex texture consisting of the points and the lines on the flat surface or the regular curved surface or the embossed surface of the metal product (foil, coin and stamp) by using the mold with the concave-convex texture. The method combines the thickness and the shape and position relation of points and lines with the depth of the points and the lines and the relief modeling of the pressure bearing object, so that the relief point line pattern on the surface of the metal product has fine patterns and obvious three-dimensional effect.

However, when a metal product is manufactured by a mould pressing transfer mode in the stamping process, the problems that the pattern is not fully stamped, the pattern reduction degree is not enough and the like often exist.

Disclosure of Invention

Aiming at the defects of fine intaglio patterns, poor three-dimensional effect, good relief pattern three-dimensional effect, poor fineness and incomplete embossed patterns in the prior art, the invention aims to provide a concave-convex texture mold, a manufacturing method of the concave-convex texture mold and application of the concave-convex texture mold, combines two technologies of engraved intaglio design and relief mold manufacturing, and forms fine relief dot line patterns with obvious three-dimensional effect and full patterns by transferring on the surface of a metal product through embossing, thereby greatly improving the artistic expressive force of the metal products such as metal foils, coins, stamps and the like.

The invention is realized by the following technical scheme:

the invention provides a concave-convex texture mould, wherein concave-convex textures are arranged on a molded surface of the mould, and the molded surface is a flat surface or a regular curved surface or a concave-convex embossed surface; the concave-convex grains are formed by scores with different lengths, depths, widths, strip shapes, transition structures and bottom structures according to a set form and position relationship; the nicks are divided into points and lines according to the proportion of the length to the width: the nicks with the ratio of length to width not more than 1 are points; scores having a length to width ratio greater than 1 are lines.

The core of the invention is a precious metal impression product which uses the artistic form of gravure dotted line painting for reference; the emphasis is more on noble metal stamped products.

In order to better implement the invention, further, the transition structure is a slope or a cambered surface.

In order to better implement the present invention, further, when the distance between two adjacent scores is less than 50u, a cambered transition structure is adopted.

In order to better implement the invention, further, the bottom structure is a sharp corner or a circular arc.

The invention provides a manufacturing method of a concave-convex texture mold, which comprises the steps of pattern design, molded surface processing and mechanical carving, wherein the manufacturing method of the concave-convex texture mold comprises the following steps:

step S1: designing a point line pattern composed of points and lines according to a pattern to be presented, and then performing three-dimensional relief modeling on the point line pattern by using three-dimensional design software to generate a three-dimensional relief model;

step S2: processing a molded surface on the mold according to the three-dimensional relief model; the molded surface is a flat surface or a regular curved surface or a concave-convex embossed surface;

step S3: selecting an engraving knife by a mechanical engraving machine according to the point line pattern, setting operating parameters of the engraving knife, and mechanically engraving a plurality of nicks with different lengths, depths, widths, strip samples, transition structures and bottom structures on the molded surface according to the point line pattern; and obtaining the concave-convex texture mold.

The invention combines two technologies of relief modeling and intaglio engraving, realizes the distribution of point and line textures on concave and convex relief molded surfaces through three-dimensional design software on a design level, namely, the spatial relationship is expressed on the three-dimensional molded surfaces through the point and line relationship; on the manufacturing layer, parameters such as the shape and position relation, the length, the depth, the width, the strip sample, the transition structure, the bottom structure and the like of points and lines are processed in a mechanical carving quantification mode.

In order to better implement the invention, the graver further comprises a quadrangular knife forming a sharp corner with a small radian at the bottom of the nick and a ball-end knife forming a large circular arc at the bottom of the nick.

In order to better implement the invention, a quadrangular cutter is preferred to mechanically engrave, and a ball head cutter is used when demolding is difficult.

In order to better implement the invention, further, the transition structure of the nick and the carving surface of the mould is an oblique angle or a circular arc.

In order to better implement the invention, the bevel transition structure is preferred to be used for mechanical carving, and the circular arc transition structure is used when the width of the nick is less than 50 u.

In order to better implement the invention, further, laser sandblasting is added after the mechanical engraving.

In order to better implement the invention, further, manual repair grinding is added after the laser sand blasting.

The invention also provides an application method of the concave-convex texture mold, which is used for impressing the metal piece to be processed; the method comprises the following steps that (1) one side of a metal piece to be imprinted is directly contacted with a molded surface of a concave-convex texture mold, red vulcanized paper is arranged on the other side of the metal piece opposite to the side to be imprinted, and the concave-convex texture mold, the metal piece and the red vulcanized paper which are sequentially arranged are integrally pressed, so that the imprinted surface of the metal piece is completely attached to the molded surface of the mold with the concave-convex texture after being extruded, and a metal part with an embossed dot line pattern is formed;

the base surface of the relief point line pattern is a flat surface or a regular curved surface or a concave-convex relief surface which is the same as the molded surface of the mold; the dot line texture of the embossment dot line pattern is composed of a plurality of convex parts with different lengths, depths, widths, strip patterns, transition structures and top structures according to a set form and position relationship.

The concave-convex texture mold is applied to manufacturing metal products by stamping. And transferring the concave-convex texture on the molded surface of the mold to a bearing object such as a metal piece under high pressure to form a metal product with a relief dot line pattern. The three-dimensional imaging effect of the metal product is greatly improved.

In order to better implement the invention, further, the metal product is one or more of metal foil, metal coin and metal stamp.

In order to better implement the invention, the metal product is made of gold, silver or platinum.

Compared with the prior art, the invention has the following advantages and beneficial effects:

(1) the invention engraves the relief model formed by points and lines on the concave-convex fluctuating molded surface of the die through mechanical engraving, and particularly can further form a point line pattern on the original concave-convex relief surface to better highlight the three-dimensional effect of the relief point line pattern.

(2) Compared with a printing plate manufactured by a printing corrosion method, the invention adopts a processing mode of quantitatively controlling parameters such as the shape and position relation, the length, the depth, the width, the strip sample, the transition structure, the bottom structure and the like of points and lines; the concave parts have different depths and show the relief effect, and the size of the concave parts can be smaller to show finer patterns, so that the patterns on the finally processed metal product are finer.

(3) When the concave-convex texture mold is manufactured, the design of the engraved intaglio plate and the manufacture of the coin stamp relief are combined, the formed concave-convex texture mold can present more three-dimensional concave-convex texture on the surface of a metal product after being used for stamping production of the metal product, the artistic beauty of the banknote engraved intaglio plate is completely presented while the embossed shape of the coin stamp is kept, and the artistic expressive force of the metal creative product is greatly improved.

(4) The invention designs the embossment texture through three-dimensional design software, and realizes the effect of distributing point and line combinations representing the spatial relationship on the three-dimensional molded surface with concave and convex relief.

Drawings

Fig. 1 shows a panda pattern printed on a metal foil by a concavo-convex texture mold.

Fig. 2 is an enlarged view of the eye relief texture of the panda of fig. 1.

Fig. 3 is a schematic view of a transverse cross-section of the mold after mechanical engraving of the relief texture.

FIG. 4 is a schematic view of the depth, width, slope and angle of the notch.

Figure 5 is a cross-sectional schematic view of several exemplary scores.

Figure 6 is a schematic cross-sectional view of several typical scores when engraved with a square knife.

Figure 7 is a cross-sectional schematic view of several typical scores when engraved with a ball point knife.

Fig. 8 is a schematic view of the structure of the edge of the quadrangular knife.

Fig. 9 is a schematic view of a process flow of processing a metal product by using the method for manufacturing a concave-convex texture mold according to the present invention.

Fig. 10 is a diagram showing the effect of the concave-convex texture by laser blasting.

FIG. 11 is a diagram showing the effect of laser-sandblasting followed by manual polishing.

Fig. 12 is a diagram of the effect of the concave-convex texture combining mechanical engraving, laser engraving and manual trimming and grinding.

Fig. 13 is a dotted plane drawing corresponding to the panda pattern designed by the computer software.

Fig. 14 is a partially enlarged view of fig. 1.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments presented in the figures is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1:

as shown in fig. 3 and 4, an important innovative point of the concave-convex texture mold in the present embodiment is: concave-convex textures are distributed on the concave-convex fluctuant molded surface of the mold. Fig. 3 is a cross-sectional view of a mold having a concave-convex profile with a plurality of scores distributed thereon having a length, depth, width, strip pattern, transition structure, and bottom structure that are not identical. Fig. 4 is an enlarged view of a portion of fig. 3, particularly illustrating the depth, width, slope, and sharp arc of the score.

The die is characterized in that concave-convex textures are arranged on a molded surface of the die, and the molded surface is a concave-convex relief surface, namely a concave-convex molded surface; the concave-convex grains are formed by scores with different lengths, depths, widths, strip shapes, transition structures and bottom structures according to a set form and position relationship; the nicks are divided into points and lines according to the proportion of the length to the width: the nicks with the ratio of length to width not more than 1 are points; scores having a length to width ratio greater than 1 are lines.

The shape and position relation refers to the relative shape and position relation among a plurality of nicks;

the length refers to the dimension of one indentation relative to the length direction of the engraving surface of the mould;

the depth refers to the maximum size of a notch which is sunken downwards relative to the carving surface of the die;

the width refers to the maximum size of an opening of a cross section of one score relative to the long direction;

the strip sample refers to a line pattern corresponding to one nick;

the transition structure refers to a mode of transition between the scores and the molded surface or between two adjacent scores;

the bottom structure refers to the structure at the bottommost end of the cross section of one nick.

Common transition structures are slopes and arcs. The slope of the ramp is typically 40 to 70 degrees, the slope of the ramp being the angle of inclination of a score at the opening of the engraved surface relative to a reference horizontal plane. The arc surface of the general transition structure is an arc surface, and the diameter of the arc surface is 80 +/-5 microns. The preferred slope of the general transition structure; however, when the distance between two adjacent scores is less than 50u, a curved transition structure is generally adopted.

Common bottom structures have sharp corners and circular arcs. The sharp angle of the bottom structure is a cross section formed by a left inclined plane and a right inclined plane. The arc of the bottom structure is a smooth arc surface cross section. Generally, the bottom structure is preferably sharp-angled.

Fig. 5 shows several typical score cross-sections, from left to right:

the bottom structure of the first nick is a sharp corner, the transition structure between the left side and the molded surface is a slope with the gradient of 53 degrees, and the transition structure between the right side and the molded surface is an arc surface;

the bottom structure of the second nick is a circular arc, and the transition structures of both sides and the molded surface are cambered surfaces;

the bottom structure of the third nick is a sharp corner, the transition structure between the left side and the molded surface is an arc surface, and the transition structure between the right side and the molded surface is a special slope with the slope of 90 degrees;

the bottom structure of the fourth nick is a sharp corner, and the transition structures of the two sides and the molded surface are slopes.

The method for manufacturing the concave-convex texture mold comprises pattern design, molded surface processing and mechanical carving, and the method for manufacturing the concave-convex texture mold comprises the following steps:

The required sharp angle radian is obtained by adopting a mode of precisely processing the cutting edge of the carving knife for carving. As shown in fig. 6-8, in order to achieve high relief effect while avoiding doubling, two knife types were used: firstly, a quadrangular knife; and the second is a ball-head cutter. When the engraving is performed using a quadrangular knife as shown in fig. 6, the bottom structure of the scores is sharp-angled. When the ball point cutter as shown in fig. 7 is used for carving, the structure of the bottom of the nick is a circular arc.

In fig. 8, the edges of the quadrangular knife are shown in an enlarged manner, the left edge is sharper, the right edge is smoother, and the graver with the sharper edge can be used for processing thinner lines. The minimum processing line width of the quadrangular cutter can reach 0.03mm, and the processing of the hyperfine lines is realized.

In addition, in order to facilitate demoulding, different knife shapes are adopted at different depths. The square edge cutter is preferably used for processing, and if the demoulding is difficult, the ball head cutter is used. Therefore, the processing of the hyperfine lines with different depths and different densities is realized, and the line of the die pressing metal product is fine and has rich layers.

Therefore, the second main innovation of this embodiment is: innovation in mechanical carving modeling design.

Different from the molding surface design designed by the traditional mechanical engraving process, the embodiment realizes the distribution of point and line textures on the concave and convex relief molding surfaces of the mold through three-dimensional design software, namely, the spatial relationship is expressed on the three-dimensional molding surface through the point and line relationship. In addition, in the process of processing the concave-convex texture die, the depth, the width, the gradient, the sharp corner radian and other parameters of points and lines can be quantized and controlled by adopting mechanical carving.

The above-described relief textured mold was used for imprinting. One side of the metal piece to be imprinted directly contacts with the molded surface of the concave-convex texture mold, the other side of the metal piece opposite to the side to be imprinted is provided with the red vulcanized paper, the concave-convex texture mold, the metal piece and the red vulcanized paper which are sequentially arranged are integrally pressed, so that the imprinted surface of the metal piece is completely attached to the molded surface of the mold provided with the concave-convex texture after being extruded, and a metal piece with an embossed dot line pattern is formed; the base surface of the relief point line pattern is a flat surface or a regular curved surface or a concave-convex relief surface which is the same as the molded surface of the mold; the dot line texture of the embossment dot line pattern is composed of a plurality of convex parts with different lengths, depths, widths, strip patterns, transition structures and top structures according to a set form and position relationship.

As shown in fig. 1 and 2, fig. 1 is a metal foil product for forming panda patterns by embossing with a concave-convex texture mold, wherein the nose of a panda is convex upward, and the eyes of the panda are concave downward, so that a concave-convex embossed surface is formed. As shown in fig. 2, the texture formed by a plurality of dotted lines can be clearly seen after the panda eye of fig. 1 is enlarged.

It can be seen that the third main innovation point of the present embodiment is: the novel method for combining the carving intaglio design with the coin and stamp relief manufacturing is explored initiatively, concave-convex textures are presented on the surfaces of metal products, particularly precious metal products (such as metal foils, metal coins and stamps), the artistic beauty of the banknote carving intaglio painting is completely presented while the metal coin and stamp relief modeling is kept, and the artistic expressive force of the precious metal creative product is greatly improved.

In the embodiment, the concave-convex texture mold manufactured by the mechanical engraving method has the advantages that compared with a printing plate manufactured by a printing corrosion method, the concave parts are different in depth and highlight the relief effect, and the size of the concave parts can be smaller so as to show finer patterns.

Compared with the traditional gravure manufacturing technology by a printing down corrosion process, the invention has the following characteristics:

⑴ the three-dimensional relief points and line patterns are realized on the surface of the metal product, and the artistic expressive force of the product is greatly enhanced.

⑵ the key parameters such as gradient of pattern, depth of pattern, and radian of sharp corner can be quantitatively adjusted.

⑶ the precision of the processing is high, and the product consistency is good.

⑷ is suitable for making concave patterns, convex patterns, and combination of concave and convex patterns.

Example 2:

this embodiment is further optimized based on embodiment 1, and the process flow of the press working of the metal product shown in fig. 9 is as follows: preparing a gold and silver blank cake, adopting a concave-convex texture mould for imprinting, inspecting and packaging the imprinted metal product, and warehousing a finished product.

As shown in fig. 9, the method for manufacturing the concave-convex texture mold comprises pattern design, mechanical engraving, laser sand blasting and manual polishing, and the method for manufacturing the concave-convex texture mold comprises the following steps:

In this embodiment, the concave-convex texture effect diagram of the laser blasting is shown in fig. 10, and the concave-convex texture effect diagram of the manual finishing is shown in fig. 11. The combined mechanical engraving, laser engraving and manual finishing and grinding concave-convex texture effect graph is shown in fig. 12.

Fig. 13 shows an effect diagram of a panda pattern printed on a metal foil processed according to this embodiment by using a concavo-convex texture template.

Other parts of this embodiment are the same as embodiment 1, and thus are not described again.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications and equivalent variations of the above embodiments according to the technical spirit of the present invention are included in the scope of the present invention.

Claims

1. The utility model provides a concave-convex texture mould, is provided with concave-convex texture on the profile of mould, its characterized in that: the molded surface is a flat surface or a regular curved surface or a concave-convex embossed surface; the concave-convex grains are formed by scores with different lengths, depths, widths, strip shapes, transition structures and bottom structures according to a set form and position relationship; the nicks are divided into points and lines according to the proportion of the length to the width: the nicks with the ratio of length to width not more than 1 are points; scores having a length to width ratio greater than 1 are lines.

2. The textured mold of claim 1, wherein: the transition structure is a slope or an arc surface.

3. The textured mold of claim 2, wherein: when the distance between two adjacent notches is less than 50u, a cambered surface transition structure is adopted.

4. The textured mold of claim 1, wherein: the bottom structure is a sharp corner or an arc.

5. The manufacturing method of the concave-convex texture mold comprises pattern design, molded surface processing and mechanical engraving, and is characterized in that: the manufacturing method of the concave-convex texture mold comprises the following steps:

6. The method of claim 5, wherein the method comprises: the engraving knife comprises a quadrangular knife forming a small radian sharp angle at the bottom of the nick and a ball-head knife forming a large circular arc at the bottom of the nick; the square knife is preferred during mechanical engraving, and the ball head knife is used when demoulding is difficult.

7. The method of claim 5, wherein the method comprises: laser blasting is added after the mechanical engraving.

8. The method of claim 7, wherein the method comprises: manual finish grinding is added after the laser blasting.

9. The application of the concave-convex texture mold is characterized in that: embossing a metal piece to be processed by using the concavo-convex texture mould of any one of claims 1 to 5; the method comprises the following steps that (1) one side of a metal piece to be imprinted is directly contacted with a molded surface of a concave-convex texture mold, red vulcanized paper is arranged on the other side of the metal piece opposite to the side to be imprinted, and the concave-convex texture mold, the metal piece and the red vulcanized paper which are sequentially arranged are integrally pressed, so that the imprinted surface of the metal piece is completely attached to the molded surface of the mold with the concave-convex texture after being extruded, and a metal part with an embossed dot line pattern is formed;