CN111002734A - Pattern jet printing method for multi-curved-surface product - Google Patents
Pattern jet printing method for multi-curved-surface product Download PDFInfo
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- CN111002734A CN111002734A CN201911377033.7A CN201911377033A CN111002734A CN 111002734 A CN111002734 A CN 111002734A CN 201911377033 A CN201911377033 A CN 201911377033A CN 111002734 A CN111002734 A CN 111002734A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J3/00—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
- B41J3/407—Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed for marking on special material
- B41J3/4073—Printing on three-dimensional objects not being in sheet or web form, e.g. spherical or cubic objects
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/0041—Digital printing on surfaces other than ordinary paper
- B41M5/0047—Digital printing on surfaces other than ordinary paper by ink-jet printing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/0082—Digital printing on bodies of particular shapes
- B41M5/0088—Digital printing on bodies of particular shapes by ink-jet printing
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Ink Jet (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Spray Control Apparatus (AREA)
Abstract
The invention relates to the technical field of printing, in particular to a pattern spray printing method of a multi-curved-surface product, which calculates data such as curved surface area, product size and the like of the curved-surface product through a three-dimensional model of the curved-surface product, then divides the pattern of the same curved surface on the product into a plurality of small areas, converts the curved surface pattern of the small areas into a plane pattern, ensures that the conversion of the curved surface pattern into the plane pattern is more accurate due to the divided small areas, respectively converts the plane pattern after the conversion of the small areas into dot matrix data, loads the dot matrix data into a spray printing system, controls a spray head to spray and print on the corresponding small areas by the spray printing system according to the dot matrix data of all the small areas, thereby completing the spray printing of all the curved surfaces of the curved-surface product, completing the production of the product after the spray printing, needing no other processes, and, the production flow is simple and convenient, so that the labor cost can be saved.
Description
Technical Field
The invention relates to the technical field of printing, in particular to a pattern spray printing method for a multi-curved-surface product.
Background
Printing or digital jet printing technology is widely used in modern industry, if plane printing or digital jet printing of plane patterns is performed, the process is quite simple, but when the digital jet printing object is a multi-curved-surface irregular object, such as a helmet composed of a plurality of irregular curved surfaces, the printing or digital jet printing is difficult.
The current printing process is mainly flat printing: 1. silk-screen printing, wherein the silk-screen printing can only print on a plane material, and then the plane pattern is transferred to the helmet shell in a manual pressing mode; 2. the digital jet printing plane printing is to print the set printing pattern on the plane raw material of the shell of the multi-curved surface product, and then the plane raw material is formed into the set shape by plastic suction molding. Obviously, the existing method has low efficiency and troublesome process when being used for processing products with multiple curved surfaces, and the method meets the requirements of actual production.
Disclosure of Invention
The invention provides a pattern spray printing method of a multi-curved-surface product aiming at the problems in the prior art, which can directly carry out spray printing on the curved-surface product and improve the production efficiency of the curved-surface product.
In order to solve the technical problems, the invention adopts the following technical scheme: a pattern spray printing method for multi-curved surface product comprises the following steps
A. Calculating the curved surface area and the size of the product to be jet-printed according to the three-dimensional model of the product to be jet-printed;
B. dividing patterns in the same curved surface on a product to be subjected to spray printing into a plurality of small areas, wherein the product to be subjected to spray printing is divided into n small areas;
C. projecting the curved surface patterns of the n divided small areas to a horizontal plane to form a plane pattern;
D. respectively converting the projected plane patterns of the n small areas into n dot matrix data, and loading the data into a jet printing system;
E. installing a product to be subjected to jet printing on a jet printing system, and adjusting the angle of the product to enable n small areas to be sequentially displayed at the position where a nozzle can perform jet printing;
F. the jet printing system controls a plurality of nozzles to carry out jet printing on the corresponding small areas according to the n dot matrix data;
G. and the jet printing system finishes jet printing of n small areas in sequence.
Preferably, in the step B, the curved surface of the same curved surface on the product, in which the height difference between the highest point and the lowest point is within 15mm, is cut into small areas.
Preferably, in step D, the planar pattern of the n small regions is converted into dot matrix data by an image data format conversion tool.
Preferably, the jet printing process of the jet printing system comprises the following steps
F1. The jet printing system has m nozzles in parallel, and the first nozzle is moved to the side upper part of a small area to be jet printed;
F2. measuring the distance s between the current small spray-printed area and the nearest nozzle of the current spray nozzle in the horizontal direction, calculating the delay spray time t of the nozzle according to the distance s, calculating the spray position of the nozzle according to the delay spray time t by the spray printing system, driving the nozzle to move by the spray printing system, and controlling the corresponding position of the nozzle on the small spray-printed area to spray;
F3. after the ejection of the first head is finished, the m heads are moved simultaneously, the second head is moved to the side upper part of the small area of the jet printing, and then the step F2 is repeated;
F4. repeating the step F3 until the m spray heads move away from the upper part of the small spray printing area, and finishing the spray printing of the small spray printing area;
F5. and (4) adjusting the angle of the product to enable another small area to be jet-printed to face upwards, and repeating the step F1 to the step F4 to sequentially finish jet printing on the n small areas of the product.
Preferably, the farthest vertical distance between the bottom of the spray head and the small area of the current spray printing is less than 15 mm.
Preferably, in step F2, the distance s between the current printing area and the nozzle of the nozzle is measured by using a distance measuring device.
Preferably, in step F2, the distance s between the current printing area and the nozzle of the head is measured by manual measurement.
Preferably, in step F2, the three-dimensional software simulation is used to measure the distance s between the current printing area and the nozzle of the nozzle.
Preferably, in step F5, the angle of the product is adjusted using one of three-axis, four-axis, five-axis and six-axis mechanical control devices.
The invention has the beneficial effects that:
the invention provides a pattern spray printing method of a multi-curved-surface product, which comprises the steps of firstly calculating data such as the curved surface area, the product size and the like of the curved surface product through a three-dimensional model of the curved surface product, then dividing the same curved surface pattern on the product into a plurality of small areas, converting the curved surface pattern of the small areas into a plane pattern, enabling the curved surface pattern to be converted into the plane pattern more accurately through the divided small areas, respectively converting the plane pattern after the small area conversion into dot matrix data, loading the dot matrix data into a spray printing system, controlling a spray head to perform spray printing on the corresponding small areas by the spray printing system according to the dot matrix data of all the small areas, thereby completing the spray printing of all the curved surfaces of the curved surface product, completing the production of the product after the spray printing is completed, needing no other processes, further effectively improving the efficiency of the print production of the curved surface, thus saving labor costs.
Drawings
FIG. 1 is a flow chart of the present invention.
FIG. 2 is a schematic view of a nozzle and a small area of the nozzle according to the present invention.
Detailed Description
In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention. The present invention is described in detail below with reference to the attached drawings.
The method for spraying and printing patterns on a multi-curved-surface product, as shown in fig. 1, includes the following steps
A. Calculating the curved surface area and the size of the product to be jet-printed according to the three-dimensional model of the product to be jet-printed;
B. dividing patterns in the same curved surface on a product to be subjected to spray printing into a plurality of small areas, wherein the product to be subjected to spray printing is divided into n small areas;
C. projecting the curved surface patterns of the n divided small areas to a horizontal plane to form a plane pattern;
D. respectively converting the projected plane patterns of the n small areas into n dot matrix data, and loading the data into a jet printing system;
E. installing a product to be subjected to jet printing on a jet printing system, and adjusting the angle of the product to enable n small areas to be sequentially displayed at the position where a nozzle can perform jet printing;
F. the jet printing system controls a plurality of nozzles to carry out jet printing on the corresponding small areas according to the n dot matrix data;
G. and the jet printing system finishes jet printing of n small areas in sequence.
Specifically, data such as the curved surface area and the product size of a curved surface product are calculated through a three-dimensional model of the curved surface product, then, a pattern of the same curved surface on the product is divided into a plurality of small areas, the product is divided into n small areas, the curved surface patterns of the n small areas are projected to a horizontal plane to form a plane pattern, and the small areas are divided to enable the curved surface pattern to be converted into the plane pattern more accurately; the n plane patterns converted by the n small areas are respectively converted into dot matrix data and loaded into the spray printing system, the spray printing system controls the spray heads to spray and print on the corresponding small areas according to the dot matrix data of the n small areas, so that spray printing of all curved surfaces of curved surface products is completed, production of the products is completed after the spray printing is completed, processing of other processes is not needed, the printing production efficiency of the curved surface products is effectively improved, the production flow is simple and convenient, spray printing of the curved surface products can be completed at one time, the processes such as plastic suction and the like are not needed, time is saved, the spray printing system is suitable for actual production, and labor cost can be saved.
In the method for spray printing patterns on a multi-curved-surface product provided by this embodiment, in step B, a curved surface of the same curved surface on which the height difference between the highest point and the lowest point is within the range of 15mm is cut into small areas. In particular, in the actually divided small areas, the height difference value between the highest point and the lowest point on the same curved surface is controlled within the range of 15mm, so that the projected plan view of the small areas can be more accurate, the small areas can be controlled within the spraying range of the spray head during spray printing, the angle of the product does not need to be adjusted when the same area is sprayed, and the production time can be further saved.
In the method for spray printing patterns on a multi-curved-surface product provided by this embodiment, in step D, the planar patterns of n small areas are converted into dot matrix data by an image data format conversion tool. Specifically, because the actually used spray printing system has many nozzles inside the spray head, and the nozzles are also distributed in an array state, the planar vector diagram is converted into dot matrix data, so that the nozzles can be controlled to spray the corresponding dot matrix data, namely, the corresponding pixel points. The image data format conversion tool can be RIP software, matlab tool and the like, or related bitmap image data such as BMP and TIF of a small-area plan are directly loaded.
In the method for spray printing patterns on a multi-curved-surface product provided by the embodiment, the spray printing process of the spray printing system comprises the following steps
F1. The jet printing system has m nozzles in parallel, and the first nozzle is moved to the side upper part of a small area to be jet printed;
F2. measuring the distance s between the current small spray-printed area and the nearest nozzle of the current spray nozzle in the horizontal direction, calculating the delay spray time t of the nozzle according to the distance s, calculating the spray position of the nozzle according to the delay spray time t by the spray printing system, driving the nozzle to move by the spray printing system, and controlling the corresponding position of the nozzle on the small spray-printed area to spray;
f3.m heads move simultaneously, the next head moves to the side above the small area of the jet printing, and then step F2 is repeated;
F4. repeating the step F3 until the m spray heads move away from the upper part of the small spray printing area, and finishing the spray printing of the small spray printing area;
F5. and (4) adjusting the angle of the product to enable another small area to be jet-printed to face upwards, and repeating the step F1 to the step F4 to sequentially finish jet printing on the n small areas of the product.
Wherein, the farthest vertical distance between the bottom of the spray head and the small area of the current spray printing is less than 15 mm. Specifically, in practice, the nozzles of the nozzles are all at the same height, and the vertical distance of the nozzle spray is controlled within the range of 15mm, which may correspond to the size of the divided small region, that is, in actual production, what the height difference between the highest point and the lowest point of the divided small region is, what the vertical distance of the nozzle spray is controlled, and further, the spray distance may correspond to the projection height of the small region, which may improve the spray accuracy. After n dot matrix data are input into a spray printing system, whether corresponding nozzles of a spray head need to spray or not is controlled according to relevant image data of each dot matrix data, when a small area to be sprayed and printed is adjusted to the lower side of the spray head, a product does not move, namely the small area to be sprayed and printed does not move, the number of the spray heads is m, and each spray head is responsible for different color systems, such as CMYK four-color modes adopted in actual printing, so that color printing is performed; controlling each sprayer according to dot matrix data, firstly controlling a first sprayer to move to the side upper part of a small area, measuring the distance s between the closest nozzles in the horizontal direction of the small area, as shown in fig. 2, calculating the delay time t of spraying according to the distance s by a system, wherein t is the spraying time of a first pixel, calculating the spraying time of other pixel points by a spraying system according to the delay time t, controlling the sprayers to move horizontally at a constant speed, when all the nozzles of the first sprayer finish spraying, continuously moving the sprayers to enable the sprayer of the next color system to move to the side upper part of the small area, spraying according to the spraying process of the first sprayer, and when all the sprayers finish spraying, finishing spraying in the small area; and then adjusting the angle of the product to enable the other small area to be subjected to jet printing to face upwards, moving the spray head to enable the spray head of the first color system to be positioned above the side of the small area, and continuing to perform jet printing on the next small area according to the jet printing process of the previous small area until the jet printing work of the n small areas of the product is completed. This spout seal work spouts seal work according to n dot matrix data is automatic, realizes high production automation to can save production time, improve work efficiency and spout the precision of seal. In actual operation, the system can calculate the delay injection time t according to the distance s, and also can calculate the raster number or the code number from the nozzle to the small area according to the distance s, so as to acquire the injection position of the nozzle according to the raster number or the code number.
In the pattern spray printing method for the multi-curved-surface product provided by this embodiment, in actual production, the distance between the nozzle and the small area is measured, an artificial observation and measurement method may be adopted, a method of measuring data by simulating a space in three-dimensional software may also be adopted, a measurement industrial camera may be installed in the spray printing system to measure the spatial distance, and the measurement method is not limited to the above three methods, and may be selected according to the requirements of actual spray printing production.
In step F5, the method for spray printing patterns on a multi-curved-surface product according to this embodiment adjusts the angle of the product by using one of three-axis, four-axis, five-axis, and six-axis mechanical control devices. Specifically, for example, use the manipulator control product of multidimension degree for the product can all-round angle of adjustment, and then can reduce staff's work load in process of production, carries out the adjustment of angle to the product through equipment is automatic, and is fast, and angle adjustment's accuracy is high, thereby is favorable to better spouting seal work.
Although the present invention has been described with reference to the above preferred embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (9)
1. A pattern spray printing method of a multi-curved-surface product is characterized by comprising the following steps: the method comprises the following steps:
A. calculating the curved surface area and the size of the product to be jet-printed according to the three-dimensional model of the product to be jet-printed;
B. dividing patterns in the same curved surface on a product to be subjected to spray printing into a plurality of small areas, wherein the product to be subjected to spray printing is divided into n small areas;
C. projecting the curved surface patterns of the n divided small areas to a horizontal plane to form a plane pattern;
D. respectively converting the projected plane patterns of the n small areas into n dot matrix data, and loading the data into a jet printing system;
E. installing a product to be subjected to jet printing on a jet printing system, and adjusting the angle of the product to enable n small areas to be sequentially displayed at the position where a nozzle can perform jet printing;
F. the jet printing system controls a plurality of nozzles to carry out jet printing on the corresponding small areas according to the n dot matrix data;
G. and the jet printing system finishes jet printing of n small areas in sequence.
2. The method of claim 1, wherein the method comprises: and step B, cutting the curved surface of which the height difference value between the highest point and the lowest point in the same curved surface is within the range of 0-15mm into small areas.
3. The method of claim 1, wherein the method comprises: in step D, the plane patterns of the n small areas are converted into dot matrix data through an image data format conversion tool.
4. The method of claim 1, wherein the method comprises: the spray printing process of the spray printing system comprises the following steps:
F1. the jet printing system has m nozzles in parallel, and the first nozzle is moved to the side upper part of a small area to be jet printed;
F2. measuring the distance s between the current small spray-printed area and the nearest nozzle of the current spray nozzle in the horizontal direction, calculating the delay spray time t of the nozzle according to the distance s, calculating the spray position of the nozzle according to the delay spray time t by the spray printing system, driving the nozzle to move by the spray printing system, and controlling the corresponding position of the nozzle on the small spray-printed area to spray;
F3. after the ejection of the first head is finished, the m heads are moved simultaneously, the second head is moved to the side upper part of the small area of the jet printing, and then the step F2 is repeated;
F4. repeating the step F3 until the m spray heads move away from the upper part of the small spray printing area, and finishing the spray printing of the small spray printing area;
F5. and (4) adjusting the angle of the product to enable another small area to be jet-printed to face upwards, and repeating the step F1 to the step F4 to sequentially finish jet printing on the n small areas of the product.
5. The method of claim 4, wherein the method comprises: the farthest vertical distance between the bottom of the spray head and the small area of the current spray printing is less than 15 mm.
6. The method of claim 5, wherein the method comprises: in step F2, the distance s of the current printing area closest to the nozzle of the head is measured using a distance measuring device.
7. The method of claim 4, wherein the method comprises: in step F2, the distance s of the current printing area closest to the nozzle of the head is measured by manual measurement.
8. The method of claim 4, wherein the method comprises: in step F2, a three-dimensional software simulation is used to measure the distance s between the current printing area and the nozzle of the head.
9. The method of claim 4, wherein the method comprises: in step F5, the angle of the product is adjusted using one of three-axis, four-axis, five-axis, and six-axis mechanical control devices.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113815319A (en) * | 2020-06-18 | 2021-12-21 | 贺利氏德国有限两合公司 | Additive printing method for printing a functional printed pattern on a surface of a three-dimensional object, related computer program and computer readable medium |
| CN115464981A (en) * | 2021-06-11 | 2022-12-13 | 东莞市图创智能制造有限公司 | Reciprocating scanning type UV printing equipment applied to panel |
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| CN111002734B (en) | 2022-04-12 |
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