JP2012250450A - Method of manufacturing molding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow skeleton generated after molding punching to be recycled as a sheet raw material by making it as a solid color skeleton, in a method of manufacturing a molding made of a resin sheet for thermoforming.SOLUTION: Many printing surface 11 of a molding are formed on a printing sheet 10 in a multi-stage multi-rows. Color control marks 12 are printed on a blank part between the first stage and the second stage at the same pitch as the printing surface 11. When the printing sheet 10 is punched by a punching machine, the molding 13 is punched and removed to form a molding hole 15, and the color control mark 12 is also punched and removed to form the color control mark hole 16. The remaining skeleton 17 is solid without the printed part.

Description

  The present invention relates to a method of manufacturing a molded article comprising “print sheet manufacturing process” — “thermoforming process” — “punching process”, and more specifically, a color for checking printing misalignment (color misregistration) in the case of multicolor printing. A method of manufacturing a molded product that can be printed as a skeleton without printing of the color control mark by printing the control mark printing position on the margin of the printing surface so that the color control mark can be removed when the molded product is punched. It is about.

In recent years, in order to prevent global warming by CO ₂ gas and save resources, recycling as represented by collection of PET bottles has been actively performed. As for recycling of sheets, a method has been proposed in which a sheet composed of a plastic easy-peeling layer and a paper layer is used, and after using a container formed of this sheet, the easy-peeling layer is peeled off and the paper layer is recycled ( For example, refer to Patent Document 1.) Also, a process paper composed of a paper layer / alkali-soluble resin / organopolysiloxane silicone resin release layer is used, and after use, cut with a shredder or the like, 0.5N NaOH and 1 A method has been proposed in which a release layer is discharged by a flotation method by dipping and stirring in a solution containing 1% polyoxyethylene alkyl ether, and the paper layer is recovered (see, for example, Patent Document 2).

  In addition, a molded product made of a thermoforming resin sheet such as PET, OPS, PP, etc., prints a pattern on the sheet (printing sheet production process), and heat-molds this printed sheet to form a molded product of a predetermined shape ( Thermoforming process), which is manufactured by punching out a molded product from a printed sheet (punching process). In the punching process, a skeleton (a part other than the molded product of the printed sheet) is formed at the same time as the molded product. It is what happens.

JP 2006-2225022 A Japanese Patent Laid-Open No. 5-269932

  As described above, a skeleton is generated in the manufacturing process of a molded product made of a thermoforming resin sheet, and it is desired to recycle the skeleton as a raw material of the sheet. However, in the printing sheet manufacturing process, a color control mark for preventing color misregistration is printed on the side edge of the printing sheet at the same time as printing of the molded product. Was left in the skeleton. Therefore, it is necessary to remove the printed part of the color control mark from the skeleton, but the step that occurs at the joint between the upper mold and the lower mold at the time of thermoforming is obstructed and separated by slitting. I couldn't.

  Hereinafter, a conventional method for producing a molded product will be described with reference to the drawings. FIG. 10 is a schematic diagram of a conventional printing sheet, FIG. 11 is a schematic diagram showing a state during thermoforming of the printing sheet, FIG. 12 is a schematic diagram of a skeleton after punching a molded product, and FIG. It is a schematic diagram which shows the structure of the upper and lower metal mold | die in it.

  In FIG. 10, reference numeral 30 denotes a printing sheet, on which a printing surface 31 of a molded product is a multi-stage multi-row unit (one shot at the time of thermoforming; for example, a printing sheet having an area of 1 m × 1 m per shot) If it can be molded, a 135 mmφ round container can produce a 6-step, 6-row printed surface.), And the color control marks 32 are spaced 20 mm apart near the side edges. 5 are printed. When this print sheet 30 is formed by a thermoforming machine, as shown in FIG. 11, a molded product 33 is formed and a step portion 34 is formed around it. That is, as shown in FIG. 13, step portions 43 and 44 are formed around the upper mold 41 and the lower mold 42 for one shot in order to ensure sealing performance. A step 34 is formed around the molded product 33.

  Next, when the printing sheet 30 is punched by a punching machine, as shown in FIG. 12, the molded product 33 is punched and removed, and the skeleton 36 in which the molded product hole 35 is formed remains. At this time, since the color control mark 32 is on the step portion 34, it is difficult to punch out, and it remains in the skeleton 36 as it is.

  As described above, in the conventional method for producing a molded product, the printed surface cannot be removed from the skeleton.

  Therefore, at present, it cannot be pulverized and used as a raw material for the sheet, but is only colored in black and used for hangers, flower pots, piles, and the like.

  As described above, the skeleton after punching out the molded product could not be recycled as the raw material of the sheet, but it is desired to be able to recycle it as the raw material of the sheet in order to save resources. It was.

  An object of the present invention is to solve the above problems and to provide a method of manufacturing a molded product that can recycle a skeleton as a raw material of a sheet.

  As a result of intensive studies to solve the above-described problems, the present inventors print the position of the color control mark not on the edge of the sheet but on the margin of the printing surface corresponding to the molded product, and punch the molded product. At the same time, it has been found that if the color control marks are simultaneously overcome, a skeleton having no printed portion is found, and the present invention has been completed.

  A method for producing a molded product according to claim 1 includes a printed sheet manufacturing step of printing a design of a molded product on a sheet, a thermoforming step of thermoforming the printed sheet to form a molded product, and molding from the printed sheet. A punching process for punching and separating a product, wherein the printed sheet manufacturing process prints a color control mark on a margin part of the printed surface of the molded product, and the punching process or Before the punching process, the color control mark is punched out.

  According to a second aspect of the present invention, there is provided a method for producing a molded product, wherein printing of the molded product and printing of the color control mark in the printing sheet manufacturing step are performed directly on the sheet.

  In the method for producing a molded product according to claim 3, the printing of the molded product and the printing of the color control mark in the printed sheet manufacturing step are performed by laminating a film in which the color control mark is printed on the same kind of plastic film as the sheet. It is configured as a feature.

  The method for producing a molded article according to claim 4 is characterized in that the sheet is A-PET, OPS, HIPS, foamed PSP, PP, filled PP or foamed PP sheet.

  In the method for manufacturing a molded product according to claim 5, two sensors for reading the color control marks in the printed sheet manufacturing step are arranged on the substrate on which the sensor is arranged, and the distance between the two points can be changed. It is configured to be a reading sensor installed in.

  In the method for manufacturing a molded product according to claim 6, the sensor that reads the color control mark in the printed sheet manufacturing process includes a plurality of reading sensors arranged on a straight line on a substrate on which the sensor is arranged. The second reading sensor is at an interval of 20.0 mm, the second and third reading sensors are at an interval of 12.5 mm, and when reading, the first reading sensor according to the distance between the color control marks And reading with two reading sensors of the reading sensor of the corresponding distance.

  In the method for manufacturing a molded product according to claim 1, the color control mark of the printed sheet is printed not on the edge of the sheet but on the margin of the printing surface corresponding to the molded product. It is out of the stepped portion formed on the mating surface of the mold and the lower mold, and is formed on a flat surface. Therefore, since the color control mark can be easily and reliably punched and removed, a skeleton having no printed portion can be obtained.

  In the method for producing a molded product according to claim 2, since printing of the molded product and printing of the color control mark are performed directly on the sheet, a printing machine dedicated to the sheet is necessary. The sheet can be used immediately as it is.

  In the method for manufacturing a molded product according to claim 3, the printing of the molded product and the printing of the color control mark are performed by laminating a film printed on a plastic film of the same type as the sheet. Printing can be performed by a commonly used ordinary film printer.

  In the method for producing a molded product according to claim 4, since the sheet is A-PET, OPS, HIPS, foamed PSP, PP, filled PP or foamed PP sheet, a commercially available inexpensive sheet is used. Can be used.

  In the method of manufacturing a molded product according to claim 5, two sensors for reading the color control mark are arranged on the substrate on which the sensor is arranged, and the reading is installed so that the distance between the two points can be changed. Since it is a sensor, even if the distance between the color control marks changes, the distance between the color control marks can be read accurately by changing the distance between the reading sensors.

  In the method for manufacturing a molded product according to claim 6, the sensor for reading the color control mark has a number of reading sensors arranged on a straight line on the substrate on which the sensor is arranged, and the first sensor and the second reading. The sensor is 20.0 mm apart, the second and third and subsequent reading sensors are 12.5 mm apart, and when reading, the distance between the first reading sensor and the corresponding distance depends on the distance between the color control marks. Since reading is performed by two reading sensors, if the distance between the color control marks is 20.0 mm or more, the distance between the color control marks can be obtained by using the first reading sensor and the reading sensor of the corresponding distance. Even if changes, the distance between the color control marks can be read accurately. It is possible.

Schematic diagram of a printing sheet used in the method for producing a molded article according to the present invention The schematic diagram of the state which shape | molded the molded article in the printing sheet used for the manufacturing method of the molded article by this invention Schematic diagram of a state (skeleton) in which a molded product of a printing sheet used in the method for producing a molded product according to the present invention is punched Schematic diagram of another printed sheet used in the method for producing a molded article according to the present invention The schematic diagram of the state which shape | molded the molded article in the other printing sheet used for the manufacturing method of the molded article by this invention The schematic diagram of the state which punched the color control mark of the other printing sheet used for the manufacturing method of the molded article by this invention Schematic diagram of a state (skeleton) in which a molded product of another printing sheet used in the method of manufacturing a molded product according to the present invention is punched Schematic of a heat bonding apparatus for producing a printing sheet used in the method for producing a molded article according to the present invention. The figure which shows the detection method of the color shift by the color control mark Schematic diagram of a printed sheet used in a conventional method for producing molded products Schematic diagram of a molded product formed on a printed sheet used in a conventional molded product manufacturing method Schematic diagram of the state (skeleton) in which the molded product of the printing sheet used in the conventional manufacturing method of the molded product is punched Schematic diagram showing the structure of the upper and lower molds of the thermoforming machine

<Print sheet production process>
In the printing sheet manufacturing process, the design of the molded product is printed on the sheet and the color control mark is printed. The color control mark is provided to prevent printing misalignment (color misregistration) when printing in multiple colors, and is printed simultaneously with the printing of the molded product by the plate formed on the plate cylinder. Color control marks are printed at regular intervals. For example, when multicolor printing is performed with five colors of white, yellow, red, blue, and black, if the interval between the color control marks is printed at 20.0 mm, the interval between white and yellow is 20.0 mm, yellow The distance between red is 20.0 mm and the distance is exactly 20.0 mm. The interval between the color control marks is not particularly limited as long as it is an equal interval, and is preferably the same as the printing pitch of the molded product.

  The color control mark is printed on the margin of the printed surface of the molded product. That is, by printing on the blank portion of the molded product inside the step formed by the upper and lower mold frames, it can be punched out and removed from the skeleton. Since the size of the margin varies depending on the size and shape of the molded product (generally round shape or square shape), a margin capable of printing the color control marks at equal intervals is appropriately selected.

  The shape of the color control mark includes a linear I mark type, a trapezoidal trapezoidal mark type, and a triangular triangular mark type, but the triangular mark type can be used only in the printing flow direction (longitudinal direction of the printing sheet). This is also preferable because color misregistration in the lateral direction (short direction of the printed sheet) can be detected. The triangular mark type has a shape in which a square is halved diagonally, and is an isosceles triangle including a right angle. If a triangular mark type having a base of 6.0 mm is used as the color control mark, a margin width of 15 mm or more is required in view of a margin of deviation when punching.

  If there is no margin between the printing surfaces of the molded product, a color control mark is printed near the side edge, and the mold position of the thermoforming machine is shifted. That is, the mold arrangement for one shot is shifted to the opposite side edge side on which the color control mark is printed. Then, the side edge part of the shifted printing sheet has a large margin where no step is formed between the printing surface of the molded product and the side edge. Therefore, even if the color control mark is printed in the vicinity of the side edge, there is no stepped portion.

  In addition, the printed product of the printed sheet is shifted to one side end side, and the color control mark is printed in the vicinity of the other side end edge side. That is, in the vicinity of the other side edge, the length from the side edge to the printing surface of the molded product becomes longer, so that the color control mark can be printed on a portion other than the portion where the step portion is formed.

  The number of colors used for printing is from 2 to 6 colors in the case of letters and simple designs, and from 5 to 10 colors in the case of photographic cosmetic designs. When a molded product is manufactured by thermoforming a printed sheet, the pattern of the molded product is often 4 to 6 colors. For printing, the same number of printing cylinders as the number of colors to be used is used, and ink is placed on the printing plate engraved on the printing cylinder, and printing is performed in a predetermined number of colors by successively overprinting. At this time, since the color control mark is carved on the plate cylinder in the same manner as the design of the molded product, the color control mark is simultaneously printed in the same color as the design of the molded product.

  For example, in the case of using a triangular mark type, the detection of the color misregistration using the color control mark is the distance from the bottom of the triangular mark type to the bottom of the next color, as shown in FIG. The deviation in the horizontal direction is the distance from the position of the fixed point of the oblique line to the position of the next fixed point. In other words, the distance between the fixed points is shorter than the normal distance when shifted to the right, and becomes longer when shifted to the left. Since the color misregistration is known when the color misregistration is shifted by 0.2 mm or more, the misalignment in the flow direction is automatically adjusted by automatically moving the compensation center roll slightly and adjusting the length of the pass until printing. To do. The lateral displacement is adjusted by slightly adjusting the turntable fixing the plate cylinder in the horizontal direction and automatically adjusting the plate cylinder in the horizontal direction.

  The color control mark is read by arranging two reading sensors at the same interval as the color control mark on the substrate on the conveyance path through which the color control mark passes, and detecting the two color control marks simultaneously. The distance between the two sensors at that time is the distance between the two color control marks, and if the deviation is more than 0.2mm from the predetermined distance, the deviation in the printing flow direction is automatically adjusted by the Compensation Center Roll. The lateral displacement is automatically adjusted with the cab. That is, the reading sensor first reads the distance between the color control marks of the first color and the second color after starting the printing of the second color, adjusts the printing position of the second color thereafter, and similarly for the third color. Reads the distance between the color control marks of the second color and the third color, adjusts the print position of the third color thereafter, and repeats for all colors in the same manner.

  Since the color control mark is printed on the margin of the printed surface of the molded product, the position of the margin changes depending on the shape (roughly round or square) and size of the molded product. The distance between the two points also changes. Therefore, it is preferable that the reading sensor is movable so that the distance in the conveyance direction of the print sheet can be freely set so that the distance of the color control mark can be changed.

  In addition, a large number of sensors are arranged on the substrate in the transport direction, the interval between the first and second reading sensors is 20 mm, and the interval between the second and third reading sensors is equally spaced at 12.5 mm. When reading, two points of the first sensor and the corresponding distance sensor may be read according to the distance of the color control mark. An interval of 12.5 mm is the minimum distance at which the sensor can be placed.

<Thermoforming process>
In the thermoforming process, the printing sheet produced in the printing sheet production process is formed into a desired container shape using a vacuum / pressure forming machine or the like. At this time, the color control mark is printed in the blank portion of the molded product inside the step portion between the upper die and the lower die, and thus has a flat shape with no step. Therefore, the color control mark can be easily punched.

<Punching process>
In the punching process, the molded product formed on the printing sheet in the thermoforming process is punched, and at the same time, the color control mark is punched and removed from the printing sheet. Therefore, since the printed surface is completely removed, the skeleton after being punched becomes a plain skeleton and can be reused as a raw material for the sheet. The skeleton varies slightly depending on the shape and size of the molded product, but when the molded product is punched into a round shape, it is about 35-40% of the entire printed sheet, and when punched into a square shape, it is about 20-25%. Remains.

  In addition, when an intermediate press process is provided before the punching process, a U-shaped cut or small hole is made in the lid of the container to remove steam when heating the microwave oven or to maintain freshness of fresh vegetables such as cherry tomatoes However, if there is such an intermediate press step, the color control mark may be punched in the intermediate press step.

An embodiment of a method for producing a molded article according to the present invention will be described with reference to the drawings.
FIG. 1 is a schematic diagram of a printed sheet used in the method for producing a molded product according to the present invention, FIG. 2 is a schematic diagram of a molded product of the above printed sheet, and FIG. 3 is a state in which the molded product of the printed sheet is punched out. It is a schematic diagram of (skeleton).

  In FIG. 1, reference numeral 10 denotes a printing sheet, on which a printing surface 11 of a molded product is formed in a number of multi-stage multi-row units (one shot at the time of thermoforming), and the first and second stages. Color control marks 12 are printed at the same pitch as the printing surface 11 in the margin between the eyes. When this printed sheet 10 is molded by a thermoforming machine, a molded product 13 is formed and a stepped portion 14 is formed around the molded product 13 as shown in FIG. The step portion 14 corresponds to a portion where a color control mark is conventionally printed. However, in the present invention, the color control mark 12 is disposed on a flat portion inside the step portion 14.

  Next, when the printing sheet 10 is punched by a punching machine, as shown in FIG. 3, the molded product 13 is punched and removed to form the molded product hole 15, and the color control mark 12 is also punched and removed. A color control mark hole 16 is formed. Accordingly, the remaining skeleton 17 is a solid color having no printed portion.

Another embodiment of the method for producing a molded article according to the present invention will be described with reference to the drawings.
4 is a schematic diagram of a printed sheet used in the method for producing a molded product according to the present invention, FIG. 5 is a schematic diagram of a molded product of the above printed sheet, and FIG. 6 is a punched color control mark of the above printed sheet. FIG. 7 is a schematic diagram of a state (skeleton) in which the molded product of the printing sheet is punched out.

  In FIG. 4, reference numeral 20 denotes a printing sheet, on which a printing surface 21 of a molded product is formed in a multistage multi-row unit (one shot at the time of thermoforming), and a margin in the vicinity of the side edge. Color control marks 22 are printed at the same pitch as the printing surface 21 in the portion. When this print sheet 20 is molded by a thermoforming machine, a molded product 23 is formed as shown in FIG. At this time, since the mold of the thermoforming machine is shifted to the side opposite to the color control mark 22 side, the stepped portion 24 is positioned outside the color control mark 22.

  Next, when the printing sheet 20 is pressed by a press, as shown in FIG. 6, a U-shaped cut 25 is formed in the molded product 23, and the color control mark 22 is also punched and removed to remove the color control mark hole. 26 is formed. When the printing sheet 20 is punched by a punching machine, the molded product 23 is punched and removed as shown in FIG. Accordingly, the remaining skeleton 28 is a solid color having no printed portion.

<Print sheet production process>
Set the PS film "Harren" 30μ (thickness) x 1,040mm (width) x 2,000m (long) manufactured by Denki Kagaku Kogyo Co., Ltd. to a five-color gravure printing machine (FM5S type) manufactured by Fuji Kikai Co., Ltd. At the same time, the oil-based gravure ink “Styrol” manufactured by Osaka Printing Ink Manufacturing Co., Ltd. was diluted with a dilute solvent of ethyl acetate (50%) + isopropyl alcohol (50%), and the viscosity Zahn Cup NO. 3 for 17 seconds, white, yellow, red, blue and black inks were prepared.

  This ink was used to print a round shape containing steamed noodle patterns and letters. The color control mark uses a triangular mark type, and is printed at equal intervals at the same pitch as the printing pitch (molding mold pitch) in the margin of the round printed pattern (the margin between the first and second stages). did.

  As the reading sensor for the color control mark, a variable sensor provided on two straight lines on the substrate was used, and the interval between the two sensors was adjusted to the printing pitch. Although the printed pattern was visually observed, no color shift was found.

  Next, the printed film is foamed with a foaming PSP sheet “DENKA DNF sheet” manufactured by Denki Kagaku Kogyo Co., Ltd. with a foaming ratio of 3 times and a thickness of 1.0 mm, and the printing surface is foamed. Heat bonding was performed so as to match the PSP sheet surface.

  As shown in FIG. 8, the thermal bonding apparatus feeds the foamed PSP sheet 52 from the foamed PSP sheet roll 51 and also feeds the printed PSP film 54 from the printed PS film roll 53. After the heating, it is sent to the heating roll 56 and overlapped with the printing PSP film 54 and thermally bonded to form a printing sheet 57. The formed printing sheet 57 is wound up on a printing sheet roll 58. In addition, heat bonding conditions are as follows.

Processing speed: 40m / min
Preheating of foamed PSP sheet: 90 ° C (surface temperature)
Heating roll temperature: 120 ° C
Heating roll contact distance of laminated material: 50 cm (0.75 second contact)
Nip pressure: 6kg-cm

<Thermoforming process>
The produced printed sheet was molded by using an FDKC type vacuum pressure forming machine manufactured by Asano Laboratories Co., Ltd. using a molding die of a dombry type container having an upper diameter of 12.5 mmΦ, a lower diameter of 95 mmΦ, and a height of 70 mm.

<Punching process>
A punching die for punching the color control mark was added to the punching die for punching the molded product continuously in each horizontal row, and the color control mark was punched at the same time as the molded product was punched. The punched color control mark was dropped into the tube and removed by suction.

  The skeleton of the stamped trace was visually observed, but it was a completely plain skeleton with no printed part left.

<Print sheet production process>
Mitsubishi Plastics Co., Ltd. A-PET sheet “Diacool” thickness 0.20 mm x 1,040 mm width x 1,000 x 300 m long, 6-color sheet gravure printing machine (FB-6S150 type) manufactured by Fuji Machine Co., Ltd. In the same manner as in Example 1, the oil-based gravure ink “Styrol” manufactured by Osaka Printing Ink Manufacturing Co., Ltd. was diluted with a dilute solvent of ethyl acetate (50%) and isopropyl alcohol (50%) to obtain a viscosity Zahn. Cup NO. 3 for 17 seconds, white, yellow, red, blue and black inks were prepared, and this ink was used to print a square-shaped print containing cherry tomato designs and letters on the silicon-coated surface of the A-PET sheet. It was. The printing surface of this molded product is provided by shifting to one side edge of the printing sheet, and the margin of 30 mm is provided between the printing surface of the molded product and the portion that becomes the step portion during thermoforming at the other side edge portion. Was established. A color control mark was printed on the margin at the same pitch as the printing pitch (molding die pitch).

The color control mark reading sensor used was a sensor provided on a large number of straight lines on the substrate, and the first reading sensor and the eleventh reading sensor corresponding to the printing pitch (132.5 mm interval) were used. .
Although the pattern was visually observed, no color shift was found.

<Thermoforming process>
A directly printed sheet was formed on A-PET using a CLS type-541 hot plate vacuum / pressure forming machine manufactured by Asano Laboratories Co., Ltd., and a lid of a 120 mm × 120 mm × 3 mm deep externally fitted cherry tomato container was formed.

<Punching process>
Next, an intermediate press machine is installed between the container forming machine and the punching machine, and a U-shaped cut is made in the lid, and at the same time the color control mark is punched with a punching machine added to the equipment. It was dropped into and removed by suction.

  Further, the molded product was punched out by a molded product punching machine, and the molded product was taken out. The skeleton after punching was visually observed, but it was a completely plain skeleton with no printed part left.

DESCRIPTION OF SYMBOLS 10 Color control mark 11 Print surface of molded product 12 Color control mark 13 Molded product 14 Step part 15 Molded product punching hole 16 Color control mark punched hole 20 Color control mark 21 Printed surface of molded product 22 Color control mark 23 Molded product 24 step Part 26 Color control mark punching hole 27 Molded product punching hole

In FIG. 10, reference numeral 30 denotes a printing sheet, on which a printing surface 31 of a molded product is a multi-stage multi-row unit (one shot at the time of thermoforming; for example, a printing sheet having an area of 1 m × 1 m per shot) If it can be molded, a 135 mmφ round container can produce a 6-step, 6-row printed surface.), And the color control marks 32 are spaced 20 mm apart near the side edges. The number of colors used in is printed. When this print sheet 30 is formed by a thermoforming machine, as shown in FIG. 11, a molded product 33 is formed and a step portion 34 is formed around it. That is, as shown in FIG. 13, step portions 43 and 44 are formed around the upper mold 41 and the lower mold 42 for one shot in order to ensure sealing performance. A step 34 is formed around the molded product 33.

Claims (6)

A printing sheet manufacturing process for printing a design of a molded product on a sheet, a thermoforming process for thermoforming the printing sheet to form a molded product, and a punching process for punching and separating the molded product from the printing sheet. A method for manufacturing a molded product, wherein a color control mark is printed on a blank portion of a printed surface of a molded product in the printed sheet manufacturing step, and the color control mark is printed before the punching step or the punching step. A method for producing a molded product, characterized by punching. 2. The method for producing a molded product according to claim 1, wherein the printing of the molded product and the printing of the color control mark in the printing sheet manufacturing step are performed directly on the sheet. 2. The molded product according to claim 1, wherein the printing of the molded product and the printing of the color control mark in the printed sheet manufacturing step are performed by pasting a film printed on the same type of plastic film as the sheet. Production method. The method for producing a molded article according to claim 1, 2 or 3, wherein the sheet is A-PET, OPS, HIPS, foamed PSP, PP, filled PP or foamed PP sheet. Two sensors for reading the color control marks in the printing sheet manufacturing process are arranged on the substrate on which the sensors are arranged, and are reading sensors installed so that the distance between the two points can be changed. The manufacturing method of the molded article of Claim 1, 2, 3 or 4 to do. In the printing sheet manufacturing process, a sensor for reading the color control mark has a number of reading sensors arranged on a straight line on the substrate on which the sensor is arranged, and the first sensor and the second reading sensor are spaced apart by 20.0 mm. The second and third reading sensors are 12.5 mm apart, and when reading, two points are read by the first reading sensor and the reading sensor at the corresponding distance according to the distance between the color control marks. 5. The method for producing a molded product according to claim 1, wherein reading is performed by a sensor.

Images