Die-cutting and indentation technology is a mature processing method for cartons, cartons, covers, document bags, plastic sheets, leather, stickers, and the like. Die-cut indentation can improve the appearance quality and market competitiveness of the product.
1, the application of die-cutting indentation technology
The main process of die-cutting indentation is: product design - die-cutting tool processing - typesetting - loading, pad printing - die-cutting indentation - finishing - finished products.
1. 1 product design
When designing die-cut indentation products, the internal dimensions of the package must be accurately calculated, and the proof-making test method should be used to check and verify the rationality of the package and the artistic appearance, and then formally make the plate.
1. 2 tool processing
The tools used for die cutting are called knives, and steel knives, beer knives, etc.; the tools used for indentation are called indentation lines, and steel wires, beer lines, etc. are called. Die cutters and indentation lines are manufactured by professional manufacturers, and users only need to select them according to their requirements. Common die cutter height of 23.8mm, thickness 0.7mm; commonly used indentation height 23mm, or determined according to the thickness of the indentation cardboard, slightly lower than the die cutter, the common indentation line thickness and generally 0.7mm.
The edge of the die-cut indentation tool must have a certain hardness, and the body of the die must have toughness. According to the requirements of the product, the machete can be bent into any complex shape to meet the various needs of the product.
Roller die-cutting press lines are assembled on die-cut creasing rollers, and some die-cut creasing tools and rollers are integrated. Assembled die-cutting indentation rollers are easy to assemble and flexible in product replacement. Integral die-cut indentation rollers are complicated to manufacture, and the entire drum needs to be replaced when the product is replaced.
1. 3 typesetting
Typography is also called row knife. Before the typesetting, the tool is bent into the desired shape of the product, and is fixed in the plate frame with lining material. Lined materials include lead, wood, fiber plastic plates and steel plates. Lead lined empty materials include lead blocks and lead strips, etc.; planks generally use multi-layer plywood. Such materials are greatly affected by temperature and humidity, are easily deformed, and are dimensionally unstable, affecting the accuracy of die-cutting and indentation; and the fiberboard is not affected by temperature. , Humidity, dimensional stability, is a good die-cutting plate; steel plate processing is more complex.
1.3.1 Manual Typesetting
Manual layout is a manual method of pressing the product shape to form a die-cutting indentation plate. The use of lead-lined blank materials is to fix the steel wire with lead blocks, empty lead, and lead strips; the use of wood-lined blank materials is to use the saw blade to press the plywood by product. Saws the specifications and fix the steel knife and steel wire in the saw seam. The manual typesetting process is simple, but it is not strong and easily scattered. The graphic is easily deformed and inaccurate, and only simple graphics can be processed.
1.3.2 Mechanical typesetting
In mechanical typesetting, saw boards and other equipment are used to saw out the slats of the board, and the formed die-cut indentation tools are embedded in the kerfs. The kerfs of the stencil cannot be completely penetrated to ensure the integrity of the boards after sawing. According to the sewing process, drilling holes in the starting and ending points of the gaps of steel cutters and steel wire bridges on the plate will allow the saw blades to enter the plate smoothly. The position of the plate corresponding to the steel blade and the steel wire bridge is not cut through, leaving a width equal to the width of the bridge. Interval. Mechanical typesetting is semi-automatic typesetting, with less equipment investment and higher production efficiency. The line guidance is controlled by the manpower, the technology dependence is strong, the saw seam is not straight, and the repeatability is not good.
1.3.3 Laser Typesetting
Laser typesetting is to draw the product specification shape parameters into a CAD drawing using a computer, or to use a scanner to record, edit a die-cut indentation program, use a laser cutter to cut a plate, and make a die-cut indentation plate. Laser layout can control a single graphic design, automatically add bridge position when cutting the plate, and output laser cutting graphics. The computer-controlled laser cutting machine can integrate the integrity of the sheet with the computer machete machete that is accurate. The laser cutting machine cuts the slits smoothly and straight into place.
1.3.4 High pressure water jet cutting and typesetting
High pressure water jet cutting is used for the cutting of fiber plastic plates. The use of laser cutting machine fiber plastic plate will produce toxic gases and smoke, the use of sawing machine cutting fiber plastic plate easy to wear the saw blade, and produce a lot of dust, both pollute the environment. When the high-pressure water jet cutting fiber plastic plate, no pollution, high cutting quality, high-pressure water beam similar to the laser beam, can be accurately controlled by the computer.
1. 4 plate version
After the die-cutting and indentation plate is arranged, the plate is fixed in the plate, and then the die-cutting indenter can be processed.
1.4.1 Plug rubber
After the die-cutting and indentation plate is arranged, the knife edge and the cutting edge of the steel knife are stuffed into the rubber, and the elasticity of the rubber is used to push the die-cut printing material from between the cutting edges to avoid the steel knife being jammed and affecting the operation. Die cutting rubber generally divided into two kinds of hard and soft, produced by professional manufacturers.
1.4.2 pad version
The pad plate is one layer or several layers of paper or cardboard under the die-cutting indentation plate, so that the pressure of the steel wire of the plate steel is uniform.
The die-cutting indentation plate can be freely loaded and unloaded from the embossing mechanism of the die-cutting and creasing machine, and can be exchanged or installed as required. Its positioning mechanism is very precise, and the positional accuracy is not affected by each loading and unloading. Pad plate and pad wire can get uniform pressure on the plate's steel knife or steel wire, and the layout should be kept flat, smooth and clean. Guarantee die-cut indentation quality. In a die-cut indented plate, the difference in height between the steel blade and the steel wire is generally the compacted thickness of the board to be die-cut.
1.4.3 laying traces
The die-cutting indentation plate is fixed on the flat plate, and a stamping die is also laid on the embossing plate to ensure that the indentation is clear and easy to form.
The indentation molds include a gypsum indentation mold, a paperboard indentation mold, and an adhesive indentation mold. The gypsum indentation mold is a layer of yellow paper stuck on the embossed bottom board, a layer of gypsum plaster is coated on the yellow board paper, and the impression is pressed on the gypsum layer with a die-cutting indentation plate, and the press mark is trimmed to be pressed Marks; paperboard indentation die is to paste cardboard with adhesive on the bottom of the indentation die with indentation plate pressure out of India. With a knife, the imprinted part is carved out and becomes a paperboard indentation mold. The pasting and indentation mold is also called a quick-loading indentation mold and is mainly composed of an indentation mold, a positioning plastic strip, a strong bottom film, and a protective tape. The indentation mold completes the indentation of the substrate. The positioning plastic strip is used to determine the exact position of the indentation mold. Strong bottom film is used to attach the indentation die to the die-cut indentation plate. Protective tape is used to protect the primer during daily transportation and storage.
The thickness of various indentation molds is generally the thickness of the indentation board, corrugated paper is the thickness of the compaction. The width of the indentation cavity can be calculated using the following formula:
B=1.35-1.5C+d
In the formula:
B-Indentation die groove width;
C-paperboard thickness;
d-Steel wire thickness.
When the cardboard texture is parallel to the indentation mold, 1.3 is taken as the lineage; when the cardboard texture is perpendicular to the indentation mold, the coefficient is taken as 1.5.
1. 5 die cut indentation
After the die-cutting indentation plate and the indentation mold are placed in the die-cutting indenter, die-cutting indentation processing can be performed. Ready to die-cut indentation printed materials, into the paper transfer station, the first pressure test, after passing inspection, the official production. The quality of the product is checked at any time during production, and problems are discovered and dealt with in a timely manner.
2, the development of die-cutting indentation technology
Die-cutting indentation technology develops with high speed, high precision, multi-function, online and digitization with the application of computer technology and digital technology.
2. 1 High-speed, high-precision die-cutting indentation technology
Die-cutting creasing machine has a flat press, a round press, a round press. The most widely used in China is a horizontal flat-press die-cutting and creasing machine. The world's most advanced single-paper horizontal flat die-cutting and creasing machine has a maximum speed of 12,000 sheets/hour.
Some domestic manufacturers' products have also reached the international advanced level, with a die cutting speed of 7500 sheets per hour.
Many horizontal flat die-cutting and creasing indentators use photoelectric register devices, PLC programmable controllers, and LCD smart touch screens to control and operate. They can be used for human-machine dialogue and are highly automated.
Round-bore circular die-cutting machines are developed with their unique high speed and high precision, and they are used more and more widely. The round press die cutting machine runs smoothly, with high production efficiency, and the die cutting speed can reach up to 300m/min.
2. 2 multifunctional die-cutting and indentation technology
Die-cutting and indentation technology is one of the post-press processing technologies. In order to make the post-press processing technology perfect, precise and improve the efficiency, the die-cutting indentation is put together with the stamping and embossing processes, which is also the future die-cutting. One of the development directions of indentation technology. Laser holographic logo hot stamping die-cutting machine has automatic die-cutting, hot stamping, embossing and embossing, and holographic hot stamping.
2. 3 online die-cutting indentation technology
Flexo, gravure, silk screen, and offset printing are widely used in packaging and printing, and roll materials are widely used. Connect the press to the die-cut creaser. Combining online will greatly increase productivity and product quality and reduce scrap rates. On-line printing presses generally use circular pressure circular type, die-cutting creasing machine can be flat-flattened or round-pressed round-table type, online can also be added to UV glazing, embossing, bronzing and so on. High speed, high precision, high efficiency, high product quality, high degree of automation, suitable for mass production.
1. 4 digital die-cutting indentation technology
The die-cutting indentation equipment and digital printing equipment can be personalized and processed on demand. Die-cutting and indentation processing, together with prepress and printing, become an indispensable part of the digital printing process. Market diversification, individuation, and the development of computer technologies, automation technologies, and digital technologies have led to the development of digital die-cutting and indentation technologies.
1, the application of die-cutting indentation technology
The main process of die-cutting indentation is: product design - die-cutting tool processing - typesetting - loading, pad printing - die-cutting indentation - finishing - finished products.
1. 1 product design
When designing die-cut indentation products, the internal dimensions of the package must be accurately calculated, and the proof-making test method should be used to check and verify the rationality of the package and the artistic appearance, and then formally make the plate.
1. 2 tool processing
The tools used for die cutting are called knives, and steel knives, beer knives, etc.; the tools used for indentation are called indentation lines, and steel wires, beer lines, etc. are called. Die cutters and indentation lines are manufactured by professional manufacturers, and users only need to select them according to their requirements. Common die cutter height of 23.8mm, thickness 0.7mm; commonly used indentation height 23mm, or determined according to the thickness of the indentation cardboard, slightly lower than the die cutter, the common indentation line thickness and generally 0.7mm.
The edge of the die-cut indentation tool must have a certain hardness, and the body of the die must have toughness. According to the requirements of the product, the machete can be bent into any complex shape to meet the various needs of the product.
Roller die-cutting press lines are assembled on die-cut creasing rollers, and some die-cut creasing tools and rollers are integrated. Assembled die-cutting indentation rollers are easy to assemble and flexible in product replacement. Integral die-cut indentation rollers are complicated to manufacture, and the entire drum needs to be replaced when the product is replaced.
1. 3 typesetting
Typography is also called row knife. Before the typesetting, the tool is bent into the desired shape of the product, and is fixed in the plate frame with lining material. Lined materials include lead, wood, fiber plastic plates and steel plates. Lead lined empty materials include lead blocks and lead strips, etc.; planks generally use multi-layer plywood. Such materials are greatly affected by temperature and humidity, are easily deformed, and are dimensionally unstable, affecting the accuracy of die-cutting and indentation; and the fiberboard is not affected by temperature. , Humidity, dimensional stability, is a good die-cutting plate; steel plate processing is more complex.
1.3.1 Manual Typesetting
Manual layout is a manual method of pressing the product shape to form a die-cutting indentation plate. The use of lead-lined blank materials is to fix the steel wire with lead blocks, empty lead, and lead strips; the use of wood-lined blank materials is to use the saw blade to press the plywood by product. Saws the specifications and fix the steel knife and steel wire in the saw seam. The manual typesetting process is simple, but it is not strong and easily scattered. The graphic is easily deformed and inaccurate, and only simple graphics can be processed.
1.3.2 Mechanical typesetting
In mechanical typesetting, saw boards and other equipment are used to saw out the slats of the board, and the formed die-cut indentation tools are embedded in the kerfs. The kerfs of the stencil cannot be completely penetrated to ensure the integrity of the boards after sawing. According to the sewing process, drilling holes in the starting and ending points of the gaps of steel cutters and steel wire bridges on the plate will allow the saw blades to enter the plate smoothly. The position of the plate corresponding to the steel blade and the steel wire bridge is not cut through, leaving a width equal to the width of the bridge. Interval. Mechanical typesetting is semi-automatic typesetting, with less equipment investment and higher production efficiency. The line guidance is controlled by the manpower, the technology dependence is strong, the saw seam is not straight, and the repeatability is not good.
1.3.3 Laser Typesetting
Laser typesetting is to draw the product specification shape parameters into a CAD drawing using a computer, or to use a scanner to record, edit a die-cut indentation program, use a laser cutter to cut a plate, and make a die-cut indentation plate. Laser layout can control a single graphic design, automatically add bridge position when cutting the plate, and output laser cutting graphics. The computer-controlled laser cutting machine can integrate the integrity of the sheet with the computer machete machete that is accurate. The laser cutting machine cuts the slits smoothly and straight into place.
1.3.4 High pressure water jet cutting and typesetting
High pressure water jet cutting is used for the cutting of fiber plastic plates. The use of laser cutting machine fiber plastic plate will produce toxic gases and smoke, the use of sawing machine cutting fiber plastic plate easy to wear the saw blade, and produce a lot of dust, both pollute the environment. When the high-pressure water jet cutting fiber plastic plate, no pollution, high cutting quality, high-pressure water beam similar to the laser beam, can be accurately controlled by the computer.
1. 4 plate version
After the die-cutting and indentation plate is arranged, the plate is fixed in the plate, and then the die-cutting indenter can be processed.
1.4.1 Plug rubber
After the die-cutting and indentation plate is arranged, the knife edge and the cutting edge of the steel knife are stuffed into the rubber, and the elasticity of the rubber is used to push the die-cut printing material from between the cutting edges to avoid the steel knife being jammed and affecting the operation. Die cutting rubber generally divided into two kinds of hard and soft, produced by professional manufacturers.
1.4.2 pad version
The pad plate is one layer or several layers of paper or cardboard under the die-cutting indentation plate, so that the pressure of the steel wire of the plate steel is uniform.
The die-cutting indentation plate can be freely loaded and unloaded from the embossing mechanism of the die-cutting and creasing machine, and can be exchanged or installed as required. Its positioning mechanism is very precise, and the positional accuracy is not affected by each loading and unloading. Pad plate and pad wire can get uniform pressure on the plate's steel knife or steel wire, and the layout should be kept flat, smooth and clean. Guarantee die-cut indentation quality. In a die-cut indented plate, the difference in height between the steel blade and the steel wire is generally the compacted thickness of the board to be die-cut.
1.4.3 laying traces
The die-cutting indentation plate is fixed on the flat plate, and a stamping die is also laid on the embossing plate to ensure that the indentation is clear and easy to form.
The indentation molds include a gypsum indentation mold, a paperboard indentation mold, and an adhesive indentation mold. The gypsum indentation mold is a layer of yellow paper stuck on the embossed bottom board, a layer of gypsum plaster is coated on the yellow board paper, and the impression is pressed on the gypsum layer with a die-cutting indentation plate, and the press mark is trimmed to be pressed Marks; paperboard indentation die is to paste cardboard with adhesive on the bottom of the indentation die with indentation plate pressure out of India. With a knife, the imprinted part is carved out and becomes a paperboard indentation mold. The pasting and indentation mold is also called a quick-loading indentation mold and is mainly composed of an indentation mold, a positioning plastic strip, a strong bottom film, and a protective tape. The indentation mold completes the indentation of the substrate. The positioning plastic strip is used to determine the exact position of the indentation mold. Strong bottom film is used to attach the indentation die to the die-cut indentation plate. Protective tape is used to protect the primer during daily transportation and storage.
The thickness of various indentation molds is generally the thickness of the indentation board, corrugated paper is the thickness of the compaction. The width of the indentation cavity can be calculated using the following formula:
B=1.35-1.5C+d
In the formula:
B-Indentation die groove width;
C-paperboard thickness;
d-Steel wire thickness.
When the cardboard texture is parallel to the indentation mold, 1.3 is taken as the lineage; when the cardboard texture is perpendicular to the indentation mold, the coefficient is taken as 1.5.
1. 5 die cut indentation
After the die-cutting indentation plate and the indentation mold are placed in the die-cutting indenter, die-cutting indentation processing can be performed. Ready to die-cut indentation printed materials, into the paper transfer station, the first pressure test, after passing inspection, the official production. The quality of the product is checked at any time during production, and problems are discovered and dealt with in a timely manner.
2, the development of die-cutting indentation technology
Die-cutting indentation technology develops with high speed, high precision, multi-function, online and digitization with the application of computer technology and digital technology.
2. 1 High-speed, high-precision die-cutting indentation technology
Die-cutting creasing machine has a flat press, a round press, a round press. The most widely used in China is a horizontal flat-press die-cutting and creasing machine. The world's most advanced single-paper horizontal flat die-cutting and creasing machine has a maximum speed of 12,000 sheets/hour.
Some domestic manufacturers' products have also reached the international advanced level, with a die cutting speed of 7500 sheets per hour.
Many horizontal flat die-cutting and creasing indentators use photoelectric register devices, PLC programmable controllers, and LCD smart touch screens to control and operate. They can be used for human-machine dialogue and are highly automated.
Round-bore circular die-cutting machines are developed with their unique high speed and high precision, and they are used more and more widely. The round press die cutting machine runs smoothly, with high production efficiency, and the die cutting speed can reach up to 300m/min.
2. 2 multifunctional die-cutting and indentation technology
Die-cutting and indentation technology is one of the post-press processing technologies. In order to make the post-press processing technology perfect, precise and improve the efficiency, the die-cutting indentation is put together with the stamping and embossing processes, which is also the future die-cutting. One of the development directions of indentation technology. Laser holographic logo hot stamping die-cutting machine has automatic die-cutting, hot stamping, embossing and embossing, and holographic hot stamping.
2. 3 online die-cutting indentation technology
Flexo, gravure, silk screen, and offset printing are widely used in packaging and printing, and roll materials are widely used. Connect the press to the die-cut creaser. Combining online will greatly increase productivity and product quality and reduce scrap rates. On-line printing presses generally use circular pressure circular type, die-cutting creasing machine can be flat-flattened or round-pressed round-table type, online can also be added to UV glazing, embossing, bronzing and so on. High speed, high precision, high efficiency, high product quality, high degree of automation, suitable for mass production.
1. 4 digital die-cutting indentation technology
The die-cutting indentation equipment and digital printing equipment can be personalized and processed on demand. Die-cutting and indentation processing, together with prepress and printing, become an indispensable part of the digital printing process. Market diversification, individuation, and the development of computer technologies, automation technologies, and digital technologies have led to the development of digital die-cutting and indentation technologies.
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