JPH077206B2 - Manufacturing method of printed drawing - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for producing a printed draw-formed body, and more specifically, to a cup-shaped container or a cap formed by drawing a flat plate material such as metal. The present invention relates to an improvement in a method of producing a flat printed material on a portion corresponding to a side surface of a final draw-formed body in advance by printing on the flat material so as to display a print image without error in a state of the draw-formed body. In particular, the present invention relates to a method for producing a printing plate from a printing original by computer image processing. The present invention further relates to a method for producing a draw-formed print can in which a printed image having no error and excellent linearity is displayed on the draw-formed can in consideration of anisotropy of plastic flow of a metal material.

(Prior Art and Problems Thereof) The drawing of a surface-treated steel plate such as tin plate or tin-free steel or a metal plate such as aluminum is widely used for manufacturing so-called seamless cans (two-piece cans), metal caps and the like. Applying painting or printing to individual molded products after molding is
Since the operation becomes complicated, it is desirable to apply paint printing to the flat material in advance prior to drawing.

In this drawing, the flat metal material plastically flows to form a cup-shaped molded body. Considering the plastic flow in the part of the flat material that will be the circumferential side wall of the final drawn product, in this part, elongation occurs in the direction of the formed product height and contraction occurs in the radial direction. Have been confirmed.

For pre-printing on the flat plate material for draw forming, it is necessary to convert the original document that is rectangular in the developed state into an annular plate in consideration of the plastic flow of the above-mentioned material. The method of dynamic conversion is known.

In the method called the hand-drawing method, a rectangular transparent original having a grid line is wrapped around the side wall of the draw-formed body, and an area corresponding to the image of the original is formed on an annular development surface having squares corresponding to the grid line. Paint by hand to make a plate for a flat material. However, this method requires the skill of an operator to create a plate, and also requires a great deal of cost and time, and the printed image actually reproduced on the circumferential side wall portion of the draw-formed body has a high accuracy. In terms of, I was still not completely satisfied.

A technique of optically expanding a rectangular original into an annular plate has also been proposed. For example, Japanese Patent Publication No. 45-11388 discloses that a rectangular original is shortened in its height direction. Take it, wrap the shortened photo around Mantrel,
It is described that a plate having an image developed in an annular shape is created by taking an image again through a truncated cone mirror arranged around the plate. A frustoconical prism having a hole with an inner diameter approximately the same as the diameter is prepared, a rectangular original is positioned on the inner surface of this hole, and the original image is photographed by a camera through the prism and the correction lens, and the annular plate is formed. It is described to create.

However, these methods not only require troublesome operations and special optical equipment, but also it is difficult to accurately reproduce a fine halftone dot pattern due to aberrations of the optical system, etc. Each time the manuscript of the molded body changes, there is the troublesome conversion work that must be performed to create the plate.

Moreover, all the metal materials for can manufacturing are made thin by advanced rolling operation, and due to the influence of this rolling, the plastic flow of the materials becomes anisotropic in the draw forming. For this reason, the drawn image forming side wall portion, particularly the portion above the side wall portion, is likely to cause disorder in the printed image, and the accuracy and linearity of the image are likely to be impaired.

Therefore, an object of the present invention is to make an image of a rectangular original document finely and accurately in a unit of halftone dots or pixels on a printing plate having an annular development surface, thereby accurately corresponding to the image of the rectangular original document. Another object of the present invention is to provide a method for manufacturing a draw-formed body capable of forming a printed image on the circumferential side wall of the draw-formed body.

Another object of the present invention is to provide a pre-printing method for drawing materials, in which a rectangular printing original document is formed into a ring-shaped flat plate by digital computer image processing.

Still another object of the present invention is to perform the above-mentioned digital image processing simply and at high speed for a container or a cap formed by draw forming of the same size by utilizing a constant memory regardless of the change of the original design. It is to provide a pre-printing method for the drawing material to be performed.

Still another object of the present invention is to provide a method for preparing a pre-printing plate on a draw forming material, which allows the above-mentioned conversion processing to be rapidly performed by a computer having a relatively small capacity.

Still another object of the present invention is draw forming printing in which a printed image having good accuracy and linearity is embodied on the outer surface of the side wall of the can by preprinting despite the anisotropy of plastic flow due to rolling of the laminate. Providing can manufacturing method.

(Means for Solving Problems) According to the present invention, a preprinted material is subjected to draw forming, and in a method for producing a print draw forming body having a print image on a side wall of the formed body, printing on a document is performed. The power image is converted into a digital pixel signal on a rectangular coordinate, and the rectangular coordinate is converted to a converted coordinate when the rectangular coordinate is developed on an annular surface having an area substantially the same as or slightly reduced on the rectangular coordinate. After converting the pixel signal of to the pixel signal of the conversion coordinate or the group of pixel signals, reading the pixel signal on the conversion coordinate in the coordinate order and converting it to the material printing plate, and after printing on the synthetic resin film using this , A printed diaphragm, wherein a printed synthetic resin film and a metallic material are laminated in a positional relationship in which a printed layer faces the metallic material, and the printed synthetic resin film is formed by drawing so as to be an outer surface of a side wall portion of the molded body. Molded body manufacturing method provided It

According to the present invention, also, in a method of subjecting a preprinted material to draw forming to produce a draw forming body having a print image on a side wall portion of the formed body, an image to be printed on a document is digitalized corresponding to pixels. Converted to pixel signals on rectangular coordinates, digital coordinates are converted from the rectangular coordinates to an annular surface having the same or slightly reduced area as the rectangle, and gaps between converted coordinates corresponding to adjacent pixels of rectangular coordinates. Calculate the new coordinates of the pixels existing in the, the pixel signals on the digital rectangular coordinates are substituted into the corresponding converted coordinates and the new coordinates, the pixel signals on the converted coordinates are read in the order of coordinates and photoelectrically converted to the printing plate. After printing on a synthetic resin film using this printing plate, the synthetic resin film and the metal material are laminated in a positional relationship in which the printing layer faces the metal material, and the printed synthetic resin film is formed on the outer surface of the side wall of the molded body. Squeeze to be Preparation of the printing aperture formed body characterized by molding is provided.

According to the present invention, further, in a method for producing a draw-formed printing can having a printed image on a side wall of a formed body, which comprises subjecting a preprinted metal material to draw forming, an image to be printed on a document is printed on rectangular coordinates. Of the digital pixel signal, the rectangular coordinates are expanded on an annular surface having the same area or a slightly reduced area as the rectangular area, and the converted coordinates are corrected by the anisotropy of the elongation of the metal material to obtain a rectangular shape. Convert the pixel signal on the coordinates to a pixel signal on the converted coordinates or a group of pixel signals, read the pixel signals on the converted coordinates in the order of coordinates to form a material printing plate, and use this to print on a synthetic resin film. After that, the synthetic resin film and the metallic material are laminated in a positional relationship where the printed layer faces the metallic material, and the printed synthetic resin film is draw-formed so as to be the outer surface of the side wall of the molded body. The molding method is Provided.

According to the present invention, furthermore, in a method for producing a draw-formed print can having a print image on a side wall of a formed body, which is formed by subjecting a preprinted metal material to draw forming, an image to be printed on an original is pixelated. Is converted into a pixel signal on a digital rectangular coordinate, and the rectangular coordinate is converted into a digital surface on an annular surface having substantially the same area as the rectangle or a slightly reduced area and which is corrected by the anisotropy of elongation of the metal material. Convert and calculate the new coordinates of the pixel existing in the gap between the conversion coordinates corresponding to the adjacent pixels of the rectangular coordinates, and substitute the pixel signal on the digital rectangular coordinates into the corresponding conversion coordinates and the new coordinates, and the conversion coordinates After the above pixel signals are read in the order of coordinates and photoelectrically converted into a printing plate, the synthetic resin film is printed using this printing plate, and then the synthetic resin film and the metal material face each other with the printing layer facing the metal material. Products in a positional relationship And, printing the synthetic resin film production process of the printing aperture shaped body, characterized in that shaped aperture such that the molded body side wall portion outer surface is provided.

(Operation) The present invention will be described below in detail based on specific examples shown in the accompanying drawings.

In FIG. 1 showing a print draw-formed body, the print draw-formed body 1 is composed of a bottom portion 2 and a circumferential side wall portion 3 integrally formed with the bottom portion 2 seamlessly.
The print layer 4 is provided on the. It will be understood that in FIG. 2 in which the circumferential side wall 3 is shown in a developed manner, the printing layer 4 has a rectangular shape with a length L and a height H.

A third process for explaining the manufacturing process of this print drawn molded article 1.
In FIGS. 3A to 3D, first, a printing plate 6 is applied to a flat synthetic resin film 5a, and a printing layer 7 developed in an annular shape is applied (FIG. 3A). This annular printing layer 7 is
The inner peripheral portion 8 is substantially equal to the length L of the rectangular print layer 4, the outer peripheral portion 9 is larger than the length L, and the difference D between the outer peripheral radius and the inner peripheral radius is the height of the rectangular print layer 4. Smaller than the height H, and the rectangular print layer 4 and the annular print layer 7 have substantially equal or slightly reduced areas.

In the present invention, the synthetic film 5a is printed with a reverse image on the inner surface of the resin film, that is, the surface which becomes the metal material side when laminated. In this way, by applying the print image to the inner surface of the film, the print layer does not come into direct contact with the drawing die during the draw forming process, which will be described later, and therefore the print image is scratched or contaminated with lubricating oil. Can be avoided.

When the printed image is printed on the outer surface side of the resin film, that is, on the surface that does not become the metal material side when laminating, in order to prevent the above-mentioned inconvenience, it is unnecessary to apply a protective lacquer on the printed layer. It becomes necessary to perform processing.

This printed synthetic resin film 5b is laminated with the metal material 5d in the above-described configuration (Fig. 3-B).

In the present invention, prior to lamination with the metal material, since it is pre-printed on the film, it is possible to laminate in a positional relationship where the printing layer faces the metal material layer, for this reason,
When drawing a laminate, a resin film is always present on the outer surface of the printing layer and protects the printing layer, so there is no disturbance or scratching of the printing layer, and it is possible to obtain a printing drawing container with excellent appearance characteristics. it can.

The printed laminate 5 is punched into a circular blank 12 using a combination of a shearing die 10 and a shearing punch 11 in the shearing step shown in FIG. 3-C. Next, in the drawing step shown in FIG. 3-D, the circular blank 12 is sandwiched between the drawing die 13 having a diameter corresponding to the outer diameter of the molded body and the wrinkle retainer 14 to have an outer diameter corresponding to the inner diameter of the molded body. The squeeze punch 15 is pushed in to form the squeeze molded body 1 shown in FIG.

According to the present invention, a printing plate having a printing image developed in an annular shape from a rectangular printing original as shown in FIG.
It is created by digital image processing described in detail below.

In the block diagram of FIG. 4 for explaining the steps of this image processing, the apparatus used for this processing is roughly the input scanning mechanism 17 for converting the image of the rectangular original 16 into an electric signal; The pixel signal from the input scanning mechanism 17 is analog-to-digital converted and input as a digital pixel signal, and if necessary, based on the digital pixel signal, editing operations such as correction, cutting, position designation, trimming, and composition are performed, and A known plate-making computer 18 capable of converting digital pixel signals into digital / analog signals and outputting them: an output operation mechanism 20 for producing a printing plate or block 19 by an electric signal from the computer 18; a plate-making computer The recording material 21 for storing the data of 18; and the digital pixel signal from the plate making computer 18 are the same as those of the rectangular coordinates. Or coordinate conversion to an annular coordinates of the product, or, elongation occurs during drawing (thinning)
Corresponding to the above, the reduction-processed digital pixel signal is reduced in the height direction of the original image, and the reduction-processed digital pixel signal is changed from the reduction rectangular coordinate to the annular coordinate (this annular coordinate is corrected by the anisotropy of elongation of the laminated body) It may also be included) and the transformation processing computer 22 for re-inputting the pixel signal on the transformed coordinates to the plate making computer 18 again.

(First Aspect) According to the present invention, the digital pixel signal on the rectangular coordinates input to the plate making computer 18 is reduced by the transformation processing computer 22 so that the rectangular coordinates have substantially the same area or slightly reduced. A pixel signal or a group of pixel signals on the converted coordinates is recorded in correspondence with the converted coordinates when developed on an annular surface having a predetermined area, and the pixel signals on the converted coordinates are read in the coordinate order.

Generally speaking, this process is performed through (i) creation of a correspondence table of rectangular coordinates and circular transformation coordinates, and (ii) operation of rewriting from rectangular coordinates to transformation coordinates based on the correspondence table.

In FIG. 5 for explaining the correspondence table creation step (i), the size of the rectangular coordinates, that is, the number of pixels in the vertical and horizontal directions is designated in the step (A). At this time, as described above, in the case of converting the rectangular coordinates into annular coordinates having an area slightly smaller than the rectangular coordinates, it is necessary to reduce the rectangular coordinates in advance.

In FIGS. 6-A and 6-B for explaining this reduction processing, the original rectangular coordinates a, b (FIG. 6-A) and the corresponding reduced rectangular coordinates a ′, b ′ (FIG. 6-B) ) Is the expression b ′ = b (8) In the formula, a ′ and b ′ are integer values rounded off by rounding, l _o is the height of the original rectangular coordinate, and l _o is
Is the height of the reduced rectangular coordinate.

To be satisfied. In this reduction processing, if the area of the original rectangular coordinate is S _O , the area of the reduced coordinate is S, the bottom thickness of the final can is t _B , and the average thickness of the side wall is t _W , And the value to be reduced can be easily determined. The reduction process is performed by erasing the l _O −l rows of pixels on average.

Next, in step (B), a two-dimensional array (memory), A (n, n), having a size that can be accommodated when the coordinates are converted in the same area as the rectangular coordinates or the reduced rectangular coordinates is prepared. In step (C), coordinate conversion from rectangular coordinates or reduced rectangular coordinates (hereinafter, both may be collectively referred to as rectangular coordinates) to an annular surface is performed. In FIGS. 7-A and 7-B for explaining this coordinate conversion, rectangular coordinates a, b (FIG. 7-A)
And the corresponding conversion coordinates a ', b' (Fig. 7-B) are as follows: a '= r sin θ + O (1) b' = r cos θ + O (2) In the formula, a'and b'are rounded off. And the radius r, the angle θ, and the center O in FIG. Is the value.

To be satisfied.

At the time of this coordinate conversion, it is necessary to consider the influence of plastic flow at the time of drawing the flat plate material. That is, 7-B
In the annular surface shown in the figure, contraction flow in the circumferential direction and stretching flow in the radial direction respectively occur during draw forming, so pixels are increased in the circumferential direction in advance during coordinate conversion,
It is necessary to reduce the number of pixels in the radial direction.

This operation is performed according to the flowchart shown in FIG. That is, the rectangular coordinate values and the coordinate values adjacent to each other in the X-axis direction are read, and by the above-described operation, → 'and →
Perform coordinate transformation of ′. Between ′ and ′, the angle is increased from ′ by a fraction (for example, 1/5), and a new coordinate value ″ corresponding to the increased amount of this angle is calculated.
When it is "," is set to "" and a new coordinate value corresponding to the increase in the angle is calculated. In the case of ″ = 1, the above operation is repeated, and thus the coordinate values of the rectangular coordinates and the group of coordinate values in the converted coordinates can be easily associated with each other. The decrease is easily performed because a plurality of coordinate values of the rectangular coordinate correspond to one coordinate value of the converted coordinate (data entered later is stored).

Returning to FIG. 5 again, in step (D), the original rectangular coordinate values are substituted into the elements of the array A corresponding to the coordinate values obtained by the conversion. That is, in FIGS. 7-A and 7-B, a
When converted to → a 'and b → b', A (a ', b')
Substitute in the form of ← a * ε + b (where ε is a number of 10p when b is a number of p digits).

Steps (C) and (D) are performed for all coordinate values of the rectangular coordinates.

Finally, the obtained two-dimensional array A (n, n) is stored in an external storage device such as a magnetic disk, and the process of creating the correspondence table ends. In the present invention, once the operation of creating the correspondence table is performed, the same draw-formed product can be repeatedly used regardless of changes in the original or the design.

In FIG. 9 for explaining the operation (ii) of rewriting the rectangular coordinates into the converted coordinates based on the correspondence table formed in this way, in step (a), the size of the rectangular document (the number of vertical and horizontal pixels) is changed. Prepare a two-dimensional array (memory), B (l, m).

Then, in step (b), a two-dimensional array (memory) for reading the above-mentioned correspondence table, A (n, n), is prepared, and in step (c), a two-dimensional array for rewriting, C ( n, n) are prepared.

In step (d), the pixel signals of the rectangular original from the plate making computer are read into each element of the array B. In step (e), the previously created and stored correspondence table is read into each element of array A.

In step (f), for each element of the array A of the correspondence table, the pixel signal of the element of the array B corresponding to the substituted rectangular coordinate value is assigned to the element of the array C equal to the element number of the array A. That is, the rectangular coordinates substituted in the correspondence table A (a ', b') are (a, b) as described above, but the pixel signal is C (a ', b')-B (a, It will be substituted in the form of b). In step (f), the pixel signals converted into the array C are obtained by making the elements of the array B correspond to all the elements of the array A.

Finally, in step (g), the converted coordinates obtained in the array C are read in the order of coordinates, and rewriting for input to the plate making computer 18 is performed.

According to the present invention, by the above-described operation, the pixel signal [B (a, b)] on the rectangular coordinate is expanded on the annular surface having the rectangular coordinate of the same area or a slightly reduced area. Corresponding to the converted coordinates at the time of conversion, the pixel signals of the converted coordinates or the group of pixel signals [C (a ', b')] are converted, and the pixel signals on the converted coordinates are read in the coordinate order and output. Is possible.

The pixel signals on the converted coordinates are output in the coordinate order to the output scanning mechanism 20.
Are supplied to and the printing plate or block copy is prepared.

According to the first aspect of the present invention, by converting the digital pixel signal of the rectangular document described above into a pixel signal of the converted coordinates by coordinate conversion into an annular surface by a computer, it is possible to obtain an image by camera photographing and development processing. It prevents the influence of image blurring and density change, and enables pre-printing with excellent fidelity and reproducibility to the material for drawing, and reduces the number of steps and processing time required for plate making. It is possible to significantly shorten the length. In addition, when drawing, it is easy to deal with image distortion due to the difference in direction and to improve image quality. Furthermore, if you create a correspondence table for conversion coordinates, you can change the design and manuscript of the same type of can. Nevertheless, it is an advantage that rapid processing can be performed by reusing this.

(Second Mode) In the second mode of the present invention, the pixel signal on the converted coordinates can be obtained directly from the pixel signal on the rectangular coordinates without creating the above-mentioned correspondence table.

According to this aspect of the invention, a deformation processing computer.
With 22, the digital coordinates of the rectangular coordinates are converted into an annular surface having the same area as the rectangle or a slightly reduced area, and the new coordinates of the pixel existing in the gap between the converted coordinates corresponding to the adjacent pixels of the rectangular coordinates. Is calculated, the pixel signals on the rectangular coordinates input to the plate making computer 18 are substituted into the corresponding converted coordinates and new coordinates, and the pixel signals on the converted coordinates are read in the coordinate order and output.

In FIG. 10 which is a flowchart for explaining this operation, first, in step (i), the data is read from the digital pixel signal data from the plate making computer 18, and then in step (ii), the rectangular coordinate in the X-axis direction. The data adjacent to the data is read into.

In the step (iii) for the data read in the steps (i) and (ii). Between the rectangular coordinates and the converted coordinates converted into an annular surface having the same area as the rectangular coordinates or a slightly reduced area, data → ′ and → ′
The coordinate conversion is performed and the data of ′ is recorded.

The coordinate transformation in step (iii) is performed by the procedure already described with reference to FIGS. 6-A to 7-B in the first aspect.

Then, in step (iv) of FIG.
It is determined whether or not the data adjacent to each other in the axial direction are two points of continuous colors. When and are two points of continuous color, in the step (v), 'and' are added according to the principle shown in FIGS. 7-A and 7-B.
Then, the angle is increased from ′ by a factor of 1 (for example, 1/5), and a new coordinate value ″ is calculated.

Next, in step (vi), the new coordinate value ″ is compared with the converted coordinate value ″, and if ≠,
In step (vii), "" is recorded and the new coordinate value "is substituted into", and in step (v) a new coordinate value corresponding to the new increase in angle is calculated. Continue this operation until.

In step (vi), for the new coordinate value ″, ＝＝
″ ”, The rectangular coordinate data is set in step (viii), and in step (ix),
Determine whether the rectangular coordinate data has been read,
If not, in step (ii), new data is read and the above operation is repeated. If it is determined in step (iv) that the data and are not two consecutive colors, then
The following data is read.

Thus, according to the second aspect of the present invention, the correspondence between the rectangular coordinate value and the circular surface transformation coordinate value is easily performed, and the pixel existing in the gap between the two transformation coordinate positions obtained by this correspondence is provided. The new coordinates can be calculated easily, and the pixel signals on the rectangular coordinates can be substituted on the converted coordinates or further on the new coordinates to increase the data in the circumferential direction in advance. Further, the reduction of the coordinate value in the radial direction is easily performed because the data of a plurality of coordinate values of the rectangular coordinate corresponds to one coordinate value of the converted coordinate (data entered later is stored).

In FIG. 10, when it is determined in step (ix) that the reading of the rectangular coordinate data has been completed, the pixel coordinates in the vertical direction are set to y = 1 in step (x), and in step (xi), Of the data that has been coordinate-converted and recorded, the data whose Y coordinate is y is read.

Next, in step (xii), the read data is rearranged and recorded in the ascending order of the X coordinate (sort). In step (xiii), it is determined whether or not the recording of the coordinate-converted data is completed. If not completed, in step (xiv), y = y + 1
Then, in step (xi), the data is read and the subsequent operations are continued.

In this way, the coordinate-converted data are input to the platemaking computer 18 in the order in which they were recorded.

According to the present invention, by the operation described above, the pixel signal on the rectangular coordinate is made to correspond to the converted coordinate when the rectangular coordinate is expanded on the annular surface having the same area as the rectangle or a slightly reduced area. Then, it is possible to convert the pixel signals of the converted coordinates into a pixel signal or a group of pixel signals, and read the pixel signals on the converted coordinates in the order of coordinates and output them.

The pixel signals on the converted coordinates are output in the coordinate order to the output scanning mechanism 20.
Are supplied to and the printing plate or block copy is prepared.

According to this aspect of the present invention, in addition to the above-described advantages, the coordinate conversion is performed in the above-described method, and thus it is possible to quickly prepare a printing plate using a computer having a relatively small capacity. To be achieved.

(Third Aspect) As already pointed out, in the portion that becomes the circumferential side wall portion 3 of the draw-formed can 1, the extensional flow is generated in the height direction of the molded body and the contraction flow is generated in the circumferential direction. These plastic flows do not occur uniformly over the entire surface of the laminate 5,
Anisotropy is observed in the flow. FIG. 11 is for explaining the anisotropy of the flow of the laminated body 5, in which the elongation is the smallest in the rolling direction X and the direction Y perpendicular thereto when manufacturing the laminated body 5, and the axes X and Y are the same. On the other hand, the direction Z that forms 45 degrees
Is observed to show the greatest elongation. Therefore, the rectangular printed layer is simply converted into the annular printed layer and the laminated body 5 is obtained.
When printed on top, there will be a large stretched print area and a small stretched print area every 45 degrees, and the printed image will have a wavy shape, and the linearity in the circumferential direction will be It will not be kept. In addition, a positional deviation of the printed image in the circumferential direction also occurs due to the change in the elongation.

According to the third aspect of the present invention, a rectangular printing original as shown in FIG. 2 has a printed image developed in an annular shape in consideration of the anisotropy of plastic flow shown in FIG. Printable version,
It is created by the digital image processing described below.

According to this aspect of the present invention, the digital pixel signal on the rectangular coordinates input to the plate making computer 18 is converted by the deformation processing computer so that the rectangular coordinates have substantially the same area or a slightly reduced area. The pixel signals on the transformed coordinates or a group of pixel signals are recorded in correspondence with the transformed coordinates expanded on the annular surface and corrected by the anisotropy of elongation of the laminate, and the pixel signals on the transformed coordinates are read in the coordinate order. Let

Generally speaking, this processing is performed by (i ') creating a correspondence table of rectangular coordinates and annular transformation coordinates in consideration of anisotropy of plastic flow at the time of draw forming, and (ii) using the rectangular coordinates based on the correspondence table. It is performed through an operation of rewriting to the converted coordinates.

In FIG. 12 for explaining the step (i ') for creating the correspondence table, the image shift data is read into the memory in step (a). In step (b), the size of the rectangular coordinates, that is, the vertical and horizontal pixel winds are designated. Next, in step (c), a two-dimensional array (memory), A (n, n), which has a size that can be accommodated when coordinate transformation is performed in consideration of the image shift of rectangular coordinates, is prepared. In step (d), coordinate conversion from rectangular coordinates into an annular surface is performed in consideration of the anisotropy of plastic flow during draw forming. This coordinate transformation is performed in the same manner as described in FIGS. 6-A to 7-B in the first aspect.

Furthermore, it is also important to consider the anisotropy of plastic flow during the drawing process during this coordinate transformation. That is, since the elongation in the can axis direction (material radial direction) becomes maximum in the direction Z which is separated by 45 degrees from the rolling direction and the expansion becomes minimum in the rolling direction X or the direction orthogonal thereto, this increase in elongation It is necessary to reduce the print image to be applied on the material in advance in proportion to the amount. For this reason, image deviation data in the height direction and the circumferential direction are prepared for a large number of typical positions at a certain predetermined interval on the rectangular coordinates, and based on the image deviation data, the plastic flow difference at the time of coordinate conversion is changed. Correct the direction.

This operation is performed according to the plot chart shown in FIG. That is, the coordinate values adjacent to each other in the X-axis direction of the rectangular coordinates are read, and it is determined whether or not these coordinate values are at the set positions where the anisotropy of plastic flow should be taken into consideration. When these coordinate values are outside the set positions, coordinate conversion is performed as in the first aspect.

If the read coordinate value is in the anisotropy-considered setting position, the image shift data in the height direction and / or the circumferential direction at each position is read, the rectangular coordinate value is corrected, and then the above-described coordinate conversion is performed. .

Returning to FIG. 12 again, in step (e), the original rectangular coordinate values are substituted into the elements of the array A corresponding to the coordinate values obtained by the conversion. That is, in FIGS. 7-A and 7-B, a
When converted to → a 'and b → b', A (a ', b')
← a * ε + b (where ε is the number when p is p digits,
It is a number of 10p).

Steps (d) and (e) are performed for all coordinate values of the rectangular coordinates.

Finally, the obtained two-dimensional array A (n, n) is recorded in an external storage device such as a magnetic disk, and the process of creating the correspondence table is completed. In the present invention, once the operation of creating the correspondence table is performed, the same draw-formed product can be repeatedly used regardless of changes in the original or the design.

The rewriting (ii) operation from the rectangular coordinates to the converted coordinates based on the correspondence table thus formed is performed in the first mode by the same operation as described with reference to FIG.

According to this aspect of the invention, by the operation described above,
The pixel signal [B (a, b)] on the rectangular coordinates is corrected by the anisotropy of the elongation of the laminated body by expanding the rectangular coordinates on an annular surface having the same area as the rectangle or a slightly reduced area. It is possible to convert into pixel signals or a group of pixel signals [C (a ', b')] in the converted coordinates in correspondence with the converted coordinates, and read and output the pixel signals in the converted coordinates in coordinate order. Become.

The pixel signals on the converted coordinates are output in the coordinate order to the output scanning mechanism 20.
Are supplied to and the printing plate or block copy is prepared.

(Fourth aspect) In the fourth aspect of the present invention, the anisotropy of elongation of the material is corrected directly from the pixel signal on the rectangular coordinates without creating the correspondence table described above for the third aspect. A pixel signal on the converted coordinates can be obtained.

According to this aspect of the invention, a deformation processing computer.
With 22, the digital coordinates are converted into a rectangular coordinate having an annular surface of the same area as the rectangle or a slightly reduced area and corrected by the anisotropy of elongation of the laminated body, and the rectangular coordinates are converted into adjacent pixels. The new coordinates of the pixel existing in the gap between the corresponding conversion coordinates are calculated, the pixel signal on the rectangular coordinates input to the plate making computer 18 is substituted into the corresponding conversion coordinates and the new coordinates, and the pixels on the conversion coordinates are calculated. The signals are read in coordinate order and output.

In FIG. 14 which is a flowchart for explaining this operation, first, in step (i), data is read from the digital pixel signal data from the plate making computer 18, and then in step (ii), the rectangular coordinate in the X-axis direction. The data adjacent to the data is read into.

With respect to the data read in steps (i) and (ii), it is determined in step (iii) whether or not this rectangular coordinate value is in the anisotropy-considered setting position. If the rectangular coordinate value is in the anisotropy-considered setting position, in step (iv), the screen shift data in the height direction and / or the circumferential direction at each position is read, and the rectangular coordinate value is corrected.
Next, the coordinate conversion in step (v) is performed. If the position is other than the set position considering anisotropy, the direct step (v)
Coordinate conversion in.

That is, in step (v), coordinate conversion of data → ′ and → ′ is performed between the rectangular coordinates and the converted coordinates converted into an annular surface having the same area as the rectangular coordinates or a slightly reduced area, and Record the data of.

This coordinate conversion is performed by the means described with reference to FIGS. 7-A and 7-B. Each step is similar to that shown in FIG.

In FIG. 14, when it is determined in step (xi) that the reading of the rectangular coordinate data has been completed, the pixel coordinates in the vertical direction are set to y = 1 in step (xii), and in step (xiii), Of the data that has been coordinate-converted and recorded, the data whose Y coordinate is y is read.

Next, in step (xiv), the read data is rearranged and recorded in the ascending order of the X coordinate (sort). In step (xv), it is determined whether or not the recording of the coordinate-converted data is completed. If not completed, in step (xvi), y = y + 1 is set, and the data is read in step (xiii). And continue the subsequent operations.

In this way, the coordinate-converted data are input to the platemaking computer 18 in the order in which they were recorded.

According to the present invention, by the above-described operation, a pixel signal on a rectangular coordinate is converted into an annular surface whose rectangular coordinate has substantially the same area as that of the rectangular area or a slightly reduced area, and an anisotropic plastic flow during drawing. It is possible to convert into pixel signals or groups of pixel signals of converted coordinates in correspondence with the exchanged coordinates when developed on the surface whose property has been corrected, and to read and output pixel signals on the converted coordinates in coordinate order. Becomes

The pixel signals on the converted coordinates are output by the output operation mechanism 20 in coordinate order.
To produce a printing plate or a block copy.

According to the third and fourth aspects of the present invention, the digital pixel signals of the rectangular original document described above are subjected to coordinate conversion into an annular surface in consideration of the anisotropy of plastic flow at the time of draw forming by a computer. By using the pixel signals of the converted coordinates, the effect on the image due to camera shooting and development processing, that is,
Prevents image blurring and density changes, and enables preprinting with excellent fidelity and reproducibility on drawing materials, and significantly shortens the number of steps and processing time required for plate making. Is possible. Further, in the drawing process, the image distortion due to the difference in the direction is completely dealt with, and the improvement of the image quality can be easily dealt with. Furthermore, if a conversion coordinate correspondence table is created according to the third aspect of the present invention, for the same type of can,
Even if the design or the manuscript is changed, there is an advantage that the quick processing can be performed by reusing it.

Furthermore, when coordinate conversion is performed according to the fourth aspect of the present invention, a printing plate can be quickly produced using a computer with a relatively small capacity.

(Each mechanism) The input scanning mechanism 17 is an arbitrary input mechanism known per se, for example, one line of a document is read in the X-axis direction (main scanning), and then the position is shifted in the Y-axis direction (sub-scanning) 1. Cylindrical scanning or planar scanning of sequentially reading line by line is used, and reading scanning is performed by detecting reflected light or transmitted light by a photomultiplier tube, a phototransistor, a charge coupling device, or the like. Generally, in a multicolor original, color separation is performed into cyan, magenta, yellow, and black, and input scanning is performed. Further, the number of scanning lines can be changed between the pattern original and the character original. Such a device is generally widely marketed under the name of a scanner and is easily available.

The plate-making computer 18 accepts input / output commands,
It is equipped with a central processing unit (CPU) that performs analysis, execution of various programs and control of input / output devices, a terminal device that issues commands to the central processing unit (CPU), and a station that performs image processing and editing. Further, it is equipped with a disk drive used for storing the system and various files, and a magnetic tape device used for reading the system and saving and restoring various files. A suitable example of such a plate making computer is the response from Cytec, Israel.
Although it is commercially available as the 300 series, the present invention is not limited to this and similar products can be used. For example, there are also plate-making computers such as Studio 800 series (Crossfield, UK), Gromacom system (Rudolf Hell, West Germany), Pagematic system (Dainippon Ink and Chemicals), Sigmagraph system 2000 (Dainippon Screen Mfg. Co., Ltd.). Can be used.

As the output scanning mechanism 20, any scanning recording method known per se, for example, silver salt photography, dry silver recording, electrophotography, electrostatic recording, negative or positive photoresist recording, photopolymer. Recording method, diazo photography method, dichromated gelatin plate making method, electrolytic recording method, discharge breakdown recording method,
It is possible to adopt various methods utilizing the electric current thermal recording method, thermal recording method, pressure sensitive recording method, ink jet recording method, etc., and also as the scanning method, cylindrical scanning, rotary disk scanning, helix cylindrical scanning, belt type plane. Scanning, mechanical scanning such as multi-needle electrode flat scanning; electron tube scanning such as fly spot tube type, optical fiber tube type, multi-needle electrode tube type; or solid scanning type such as multi-needle electrode head type is used. It

In the present invention, among these various recording methods,
It is desirable to use a laser recording method for reading an original and making a plate because it has the advantage that light energy can be concentrated in a minute region of a wavelength order, a light beam can be scanned over a wide range, and rapid on / off scanning is also possible. . As laser light source, He-Ne laser, Ar laser, He-Cd
A laser or the like is used.

In the present invention, the pixel densities in the rectangular coordinates and the final transformed coordinates can be widely varied as desired, but generally speaking, it is desirable to use the density within the range of 12 to 100 dots / mm. But in the case of pictures, the range of 12-14 dots / mm, and in the case of characters 36-100 dots / mm
It is desirable to set the range to.

Cyan, magenta, yellow and black-and-white plates can be directly manufactured by the output scanning mechanism 20 and used for printing synthetic resin films, or negatives can be manufactured once and then reverse-baked to manufacture printing plates. You can also do it.

In the present invention, the image shift data about the rectangular coordinates sets a range of positions where the anisotropy of the material plastic flow at the time of draw forming should be taken into consideration on the rectangular coordinates, and deforms the position shift data within this set range. It may be recorded in the internal memory or the external memory of the processing computer 22.

Of the circumferential side wall of the can, in the portion close to the can bottom, the degree of plastic flow is small, and the degree of plastic flow increases toward the top of the can end. By setting the anisotropy-considered setting position at a position not less than ¼ of the bottom, and particularly at a position above the ⅓, satisfactory results can be obtained with respect to prevention of screen shift. Regarding the circumferential direction, the entire circumference can be set as the anisotropy setting position. However, as shown in FIG. 11, the image shift occurs in line symmetry with respect to the axes X and Y, and with line symmetry with respect to the axis Z. If data with an angle of 45 degrees or less is prepared, these data can be used as image shift data over the entire circumference. The finer the distance between the positions where the image shift data is taken, the more accurately the anisotropy is corrected, but on the other hand, a large memory is required. In general, it has been found that satisfactory correction can be performed if the interval of the image shift data on the rectangular coordinates is in the range of 0.1 to 2 mm, particularly 0.5 to 1 mm. Image misalignment data is printed on a synthetic resin film using a printing plate created from a rectangular original without considering the anisotropy of plastic flow, and the printed synthetic resin and a metal material are laminated,
It can be easily obtained by subjecting this laminated body to draw forming, winding a rectangular document around the circumferential side wall of the obtained draw forming can, and measuring the deviation between the document and the printed image on the circumferential side wall. it can.

The obtained image shift data can be repeatedly used regardless of the print design as long as it is used to perform constant draw forming on a constant metal material.

As the metal material of the can, an untreated steel plate (black plate), various surface-treated steel plates, for example, tin-plated steel plate (tin plate), zinc-plated steel plate, aluminum-plated steel plate, nickel-plated steel plate, chrome-plated steel plate, or other plated steel plate; electrolysis Electrolytically treated steel sheets such as chromic acid treated steel sheets; chemically treated steel sheets such as phosphoric acid and / or chromic acid treated steel sheets; light metal sheets such as aluminum; or composite materials thereof.

The thickness of the metal material, which varies depending on the final size of the container and the type of material, is generally 0.01 to 0.5 mm, preferably 0.02 to 0.35 mm.

As the synthetic resin film, an arbitrary resin film which can be film-formed and which can be deep-drawn in the form of a laminated material can be mentioned. Suitable examples of such resins include, but are not limited to:

(A) Polyolefins: polypropylene, polyethylene, polybutene-1, propylene-ethylene copolymer,
Propylene-butene-1 copolymer, ethylene-vinyl acetate copolymer, ion-crosslinked olefin copolymer (ionomer), ethylene-ethyl acrylate copolymer.

(B) Polyamides; especially the general formula Or In the formula, n is a number of 3 to 13, and m is a number of 4 to 11.

Polyamides consisting of repeating units represented by.

For example, poly-ω-aminocaproic acid, poly-ω-aminoheptanoic acid, poly-ω-aminocaprylic acid, poly-ω
-Aminopelagoic acid, poly-ω-aminodecanoic acid, poly-ω-aminoundecanoic acid, poly-ω-aminododecanoic acid, poly-ω-aminotridecanoic acid, polyhexahexylene adipamide, polyhexamethylene sebacamide , Polyhexamethylene dodecamide, polyhexamethylene tridecamide, polydecamethylene adipamide, polydecamethylene sebacamide, polydecamethylene dodecamide, polydecamethylene tridecamide, polydodecamethylene adipamide,
Polydodecamethylene sebacamide, polydodecamethylene dodecamide, polydodecamethylene tridecamide, polytridecamethylene adipamide, polytridecamethylene sebacamide, polytridecamethylene dodecamide, polytridecamethylene tridecamide , Polyhexamethylene azamide, polydecamethylene azamide, polydodecamethylene azamide, polytridecamethylene azamide or copolyamides thereof.

(C) Polyesters; especially general formula Or In the formula, R ₁ is an alkylene group having 2 to 6 carbon atoms, and R ₂ is an alkylene group having 2 to 24 carbon atoms or an arylene group.

For example, polyethylene terephthalate, polyethylene terephthalate / isophthalate, polytetramethylene terephthalate, polyethylene / tetramethylene terephthalate, polytetramethylene terephthalate / isophthalate, polyethylene terephthalate / isophthalate, polytetramethylene / ethylene terephthalate, polyethylene / tetramethylene terephthalate / iso Phthalates, polyethylene / oxybenzoates, or blends thereof.

(D) Others Regenerated cellulose such as cellophane; Cellulose derivatives such as nitrocellulose, diacetate and triacetate; Polyvinyl chloride; Polyvinylidene chloride such as Saran film;
Polyvinyl alcohol; polystyrene; fluororesin; polyarylate, polyphenylyl sulfide, polysulfone, polyetherimide, polyethersulfone, fluorine-containing copolymer, polyoxybenzylene, polyetheretherketone, polyamideimide, polyimide, etc. Engineering plastic.

From the viewpoint of heat resistance, it is preferable that the synthetic resin film is uniaxially or biaxially molecularly oriented and thermally fixed. The film thickness is generally 10 to 150 μm, especially 30 to 1
The thickness is preferably in the range of 00 μm, and if it is thinner than this range, the coating effect against the corrosion by the resin film tends to be lost, and if it is thicker than this range, the draw formability deteriorates.

It is desirable that the resin film layer contains an inorganic filler or a pigment in order to improve the deep drawing formability of the laminated material.

As described above, printing is performed on the surface of the synthetic resin film which is the metal material side.

Printing is lithographic printing using the plate manufactured by the method described above, offset printing, screen printing, gravure printing,
The printing can be carried out by any printing such as letterpress printing, intaglio printing, electrophotographic printing, etc. As the printing ink, any printing ink known per se or UV curable ink can be used.

As a method for laminating the synthetic resin film and the metal material, a conventionally known laminating method such as an extrusion method or a sandwich lamination method can be adopted. At this time, examples of the adhesive that can be used for lamination include an isocyanate adhesive, an epoxy adhesive, and an acid-modified olefin resin adhesive. Among them, polyester-urethane adhesive, polyester-epoxy-urethane An adhesive may be mentioned.

As the polyester-urethane adhesive, an isocyanate-terminated polyester urethane obtained by reacting a hydroxyl-terminated polyester with a diisocyanate is crosslinked with water or a polyhydric alcohol as a crosslinking agent, a polyhydric alcohol, a polycarboxylic acid and a diisocyanate. And a hydroxyl group-terminated polyester urethane obtained by reacting the above with a diisocyanate as a crosslinking agent. The latter is particularly suitable.

The polyvalent carboxylic acid constituting the polyester is succinic acid, adipic acid, sebacic acid, decanecarboxylic acid, etc., and the polyvalent alcohol is ethylene glycol, propylene glycol, butanediol, glycerin, neopentane glycol, erythritol, sorbitol. , Mannitol, etc. are also diisocyanates,
Examples thereof include xylylene diisocyanate, tolylene diisocyanate, cyclohexane diisocyanate, isophorone diisocyanate and the like.

This type of polyester urethane adhesive gives a strong adhesive bond between the metal material and the plastic film due to the presence of the base urethane group, generally 1.4 to 1.8 Kg / 15 mm of adhesive force, and a solid segment introduced by diisocyanate and polyester. The presence of the soft segment introduced by the method in the main chain gives the elastic modulus in the above-mentioned range, particularly, the elastic modulus of 4000 to 9000 Kg / cm ² .

The polyester-epoxy-urethane adhesive is composed of a composition containing a hydroxyl-terminated polyester, an epoxy resin and a diisocyanate crosslinking agent, and is exemplified as the polyvalent carboxylic acid, polyhydric alcohol or diisocyanate that constitutes the hydroxyl-terminated polyester. The one used is used. An epoxy resin obtained by reacting bisphenol A and epichlorohydrin is used as the epoxy resin.

The polyester-epoxy-urethane adhesive also exhibits the same adhesive strength as the polyester urethane adhesive described above due to the presence of the urethane group, and its elastic modulus shows a value of 1020 to 5100 Kg / cm ² .

On the other hand, as the acid-modified olefin resin adhesive, maleic anhydride, acrylic acid, polypropylene grafted with an ethylenically unsaturated carboxylic acid such as methacrylic acid or an anhydride thereof, polyethylene, propylene-ethylene copolymer such as An olefin resin is used.

Lamination adhesion of metal material and synthetic resin film should be performed by applying an organic solvent solution or dispersion of the above adhesive to the metal material or film surface, evaporating the solvent, and then pressure-bonding both. You can The adhesive coating material is preferably in the range of 4.0 to 8.0 g / m ² .

In order to obtain a draw-formed can, the above-mentioned printed laminated body is punched into a shape such as a disk and subjected to one-step or multi-step drawing between the drawing punch and the drawing die. It is desirable that the total drawing ratio, which is represented by the ratio of the diameter of the material to the diameter of the bottom of the drawing container, is generally 1.2 to 3.0, and particularly 1.3 to 2.9.

(Effect of the Invention) According to the present invention, by the above-described method, the deviation between the rolling direction of the linearity of the printed image in the upper portion of the side wall portion and the direction intersecting the rolling direction at 45 degrees is 1 side wall height. %, And the linearity in the axial direction of the printed image is maintained so that the deviation at a position separated by about 22 degrees from the rolling direction is within 1% of the outer peripheral length of the side wall. Cans are obtained.

[Brief description of drawings]

FIG. 1 is a perspective view showing a print draw-formed body, FIG. 2 is a view showing a circumferential side wall portion of the print draw-formed body shown in FIG. 1 in an expanded manner, FIGS. 3-A to 3-D. FIG. 4 is a diagram for explaining a manufacturing process of the printed drawn-formed body shown in FIG. 1, FIG. 4 is a block diagram for explaining a process of image processing, and FIG. 5 is a rectangular coordinate and a circular transformation coordinate. FIGS. 6-A and 6-B are diagrams for explaining the process of creating the correspondence table of FIG. 6, FIGS. 6-A and 6-B are diagrams for explaining the reduction process of the rectangular coordinates, FIGS. 7-A and 7-B. FIG. 8 is a diagram for explaining coordinate conversion from rectangular coordinates to an annular surface. FIG. 8 is a flowchart for explaining coordinate conversion operations. FIG. 9 is a description for rewriting operations from rectangular coordinates to converted coordinates. FIG. 10 is a diagram for explaining coordinate conversion operation and rewriting from rectangular coordinates to converted coordinates according to the second aspect of the present invention. FIG. 11 is a flow chart for explaining, FIG. 11 is a plan view of a plate having a printed image in consideration of anisotropy of plastic flow at the time of draw forming, and FIG. 12 is a correspondence table of rectangular coordinates and circular transformation coordinates. FIG. 13 is a flow chart for explaining a coordinate conversion operation considering plastic flow anisotropy, and FIG. 14 is a coordinate conversion considering plastic flow anisotropy. 6 is a flowchart for explaining reading of pixel signals from converted coordinates.

Claims (7)

[Claims] 1. A method for producing a print drawn body having a print image on a side wall of a formed body by drawing a preprinted material, and converting an image to be printed on a document into digital pixel signals on rectangular coordinates. , The pixel signals on the rectangular coordinates are converted into pixel signals or pixel signals on the converted coordinates in correspondence with the converted coordinates when the rectangular coordinates are expanded on an annular surface having substantially the same area as the rectangle or a slightly reduced area. Convert to a group of, read pixel signals on the converted coordinates in the order of coordinates and convert to a printing plate for material, use this to print on a film of synthetic resin, and then print the printed synthetic resin film and metal material A method for producing a printed draw-formed body, characterized in that the layers are laminated in a positional relationship so as to face a metal material, and draw-formed so that the printed synthetic resin film becomes the outer surface of the side wall of the molded body. 2. A conversion operation of a pixel signal on a rectangular coordinate to a pixel signal or a group of pixel signals on a coordinate is performed from an operation of creating a correspondence table of the rectangular coordinates and the annular conversion coordinates and the rectangular coordinates based on the correspondence table. The method according to claim 1, wherein the method is performed through an operation of rewriting to converted coordinates. 3. Rectangular coordinates a, b and corresponding transformation coordinates a ', b'are expressed by the following equation: a' = r sin θ + O (1) b '= r cos θ + O (2) where a'and b'are Each of them is an integer value rounded off, and the radius r, the angle θ, and the center O are the following formulas. Is the value. The method according to claim 1, which is performed so as to satisfy 4. A method for producing a draw-formed body having a printed image on the side wall of the formed body by subjecting a preprinted material to draw forming, wherein the image to be printed on the original is digital rectangular coordinates corresponding to pixels. Converted to the above pixel signal, the rectangular coordinates are converted into digital coordinates into an annular surface having the same or slightly reduced area as the rectangle, and the rectangular coordinates are present in the gap between the converted coordinates corresponding to the adjacent pixels. Calculate the new coordinate of the pixel to be substituted, substitute the pixel signal on the digital rectangular coordinate into the corresponding transformed coordinate and new coordinate, read the pixel signal on the transformed coordinate in the order of coordinates and photoelectrically convert it to the printing plate. After printing on a synthetic resin film using a printing plate, the synthetic resin film and the metal material are laminated in a positional relationship in which the printed layer faces the metal material so that the printed synthetic resin film becomes the outer surface of the side wall of the molded body. Draw forming Preparation of the printing aperture shaped body, characterized in that. 5. The rectangular coordinates a, b and the corresponding transformation coordinates a ', b' are expressed by the following equation: a '= r sin θ + O (1) b' = r cos θ + O (2) where a'and b'are Each of them is an integer value rounded off, and the radius r, the angle θ, and the center O are the following formulas. Is the value. 5. The method according to claim 4, wherein the angle is increased by a fraction of the corresponding converted coordinates a ', b', and a new coordinate value corresponding to the increased angle is calculated. 6. A method for producing a draw-formed printing can having a printed image on a side wall of a molded body, which comprises subjecting a preprinted metal material to draw forming, wherein an image to be printed on a document is digitally displayed on rectangular coordinates. Converted to a pixel signal, the rectangular coordinates are expanded on an annular surface having an area that is substantially the same as or slightly smaller than the area of the rectangle, and the converted coordinates are corrected by the anisotropy of elongation of the metal material. Convert the pixel signal on the coordinates to a pixel signal or a group of pixel signals on the converted coordinates, read the pixel signals on the converted coordinates in the order of coordinates to form a material printing plate, and use this to print on a synthetic resin film. After that, the synthetic resin film and the metallic material are laminated in a positional relationship where the printed layer faces the metallic material, and the printed synthetic resin film is draw-formed so as to be the outer surface of the side wall of the molded body. Molded body manufacturing method. 7. A method for producing a draw-formed printing can having a print image on a side wall of a formed body, which comprises subjecting a preprinted metal material to draw forming, wherein a digital image corresponding to a pixel corresponds to an image to be printed on a document. Converted into pixel signals on rectangular coordinates, the rectangular coordinates are converted into digital coordinates by converting the rectangular coordinates into an annular surface having substantially the same area as the rectangle or a slightly reduced area, and corrected by the anisotropy of elongation of the metal material. The new coordinates of the pixel existing in the gap between the conversion coordinates corresponding to the adjacent pixels of the coordinates are calculated, and the pixel signal on the digital rectangular coordinate is substituted into the corresponding conversion coordinate and the new coordinate, and the pixel signal on the conversion coordinate is calculated. Is converted into a printing plate photoelectrically by reading in the order of coordinates, and after printing on a synthetic resin film using this printing plate, the synthetic resin film and the metal material are placed in a positional relationship where the printing layer faces the metal material. Laminate and print A method for producing a printed draw-formed body, which comprises performing draw-forming so that the synthetic resin film is on the outer surface of the side wall of the molded body.