With the improvement of living standards, people have put forward higher requirements for the aesthetic appearance of packaging, and the general cartons have not been able to fully meet the requirements. Packaging companies have begun to shift their gaze to special-shaped cartons. The contoured carton is beautiful in appearance and elegant in shape, which changes the image of the regular rectangular hexahedral carton, thereby creating an elegant atmosphere for the interior contents, attracting customers, having a good publicity effect and a broad market prospect. The structure of the profiled box is complex. The existing carton CAD system is only suitable for the design of the general carton structure and does not study the characteristics of the profiled box.
In this paper, the cassette and cassette parts are parameterized, and the user can adjust the parameters of the cassette and the cassette parts according to actual needs. The flattening technology is applied to the CAD system of the special-shaped box structure. The user can not only store the flattened box pieces into the magazine library, but also can directly call the box pieces in the magazine library to modify it. The method of designing box-piece parts and assembling box sheets not only reduces the complexity of the special-shaped box design, but also can deal with each box surface after being boxed separately, thereby creating advantageous conditions for the next step of decorating the carton.
1. AbnormaI Carton's Design Ideas
1) Definition of Shaped Box
Shaped folding cartons can be said to be other than right-angled hexahedrons. They can be molded either by basic molding methods or by special design techniques based on the basic structure. The change of the carton may be the upper part or the lower part of the carton, or it may be on the side or a part of the case.
2) Design Ideas
Although the structure of the special-shaped carton is complicated, it has been found through research that the box of the special-shaped box is composed of a rectangle, a rounded rectangle, a triangle, and a trapezoid. We call these simple graphics "cartridge parts", so we can first find out the common parts of various types of special-shaped boxes and build a library of parts. By calling the parts in the part library, the different box-piece parts are assembled into the cassettes of the special-shaped carton by the splicing technology. In this way, the process of carton structural design accordingly becomes the splicing of the parts of the carton. combination.
The special-shaped carton CAD includes a cassette library, a cassette library, and a cassette piece editing module in the software. The cassette library contains common cassettes, and the cassette library contains the most commonly used cassette components. The most commonly used cassette parts for profiled cassettes are given. Using the part editing module allows the user to create new parts or modify existing ones. The cassette and cassette parts are parameterized, ie the set parameters that make up the cassette and cassette parts can be automatically adjusted as needed. Such as the length, width and height of the carton; the length of the line, the angle of inclination, the radius of the arc, the starting and ending angle parameters, and so on.
The simplest way to use Abnormal Carton to design a special-shaped cartons is to call the cassettes in the existing cassette library, that is, to input the design parameters of the carton, such as the length, width, height, paper thickness, etc., to obtain the profiled cassettes. design diagram. If the existing cartridge map can not meet the requirements of the design, the designer can also call the parts in the library to synthesize a new cartridge chart by the splicing technology and store it in the cartridge library; if the required cartridge parts There is no part library, can not be assembled from the existing box-chip parts, designers can also design their own needs of the box-chip parts and store it in the cassette library. In the design process, the selection and splicing of cassette parts are achieved through human-computer interaction.
2. Combination technology
The basic idea of ​​the splicing technique is to compose complex objects with simple regular-shaped geometry. The splicing algorithm differs greatly depending on the entity representation and data structure chosen for each system. From a topological point of view, the merging operation classifies the points of the participating objects and finds the set of points that make up the result of the operation. Shaped cassettes are flat graphics that are simpler than three-dimensional solids.
3. Box part
1) Formation and division of box parts
A box piece part is a closed plane pattern enclosed by a strip edge, and the lines constituting the box piece part can be divided into border lines and non-boundary lines, and the border lines are further divided into connectable edges and non-connectable edges. All of the boundary lines constitute the closed outer boundary of the cassette parts, and only the connectable sides can be shared by the two cassette parts to form the connecting parts of the two cassette parts. When the box piece is not connected to the box piece, its periphery is a single solid line representing the contour cutting line; after the box piece is inserted, the common sides of the two box piece parts correspond to the indentation lines in the actual box piece. Each individual face of the carton can be divided into a box piece. The basic principle for splitting a box piece into a box piece is that each individual plane after the box is split into a box piece, for some structures. There are two or more faces that are closely related, but they can also be combined into a box piece to be considered.
2) Flattening of box parts
When the box piece is assembled into the box piece, only one side of a piece of the box piece is determined to be connected to one side of other box piece parts, and the shape of the box piece cannot be uniquely determined, and the box piece parts must be transformed to determine the relative Location and so on. As long as the first part is determined, after each subsequent part is selected, it is determined in sequence whether or not it needs to be transformed and the distance between the end of the edge of the part that is later connected to the cassette and the starting point of the side to which it is connected, and finally the composition can be uniquely determined. Box slice illustration.
In this paper, the cassette and cassette parts are parameterized, and the user can adjust the parameters of the cassette and the cassette parts according to actual needs. The flattening technology is applied to the CAD system of the special-shaped box structure. The user can not only store the flattened box pieces into the magazine library, but also can directly call the box pieces in the magazine library to modify it. The method of designing box-piece parts and assembling box sheets not only reduces the complexity of the special-shaped box design, but also can deal with each box surface after being boxed separately, thereby creating advantageous conditions for the next step of decorating the carton.
1. AbnormaI Carton's Design Ideas
1) Definition of Shaped Box
Shaped folding cartons can be said to be other than right-angled hexahedrons. They can be molded either by basic molding methods or by special design techniques based on the basic structure. The change of the carton may be the upper part or the lower part of the carton, or it may be on the side or a part of the case.
2) Design Ideas
Although the structure of the special-shaped carton is complicated, it has been found through research that the box of the special-shaped box is composed of a rectangle, a rounded rectangle, a triangle, and a trapezoid. We call these simple graphics "cartridge parts", so we can first find out the common parts of various types of special-shaped boxes and build a library of parts. By calling the parts in the part library, the different box-piece parts are assembled into the cassettes of the special-shaped carton by the splicing technology. In this way, the process of carton structural design accordingly becomes the splicing of the parts of the carton. combination.
The special-shaped carton CAD includes a cassette library, a cassette library, and a cassette piece editing module in the software. The cassette library contains common cassettes, and the cassette library contains the most commonly used cassette components. The most commonly used cassette parts for profiled cassettes are given. Using the part editing module allows the user to create new parts or modify existing ones. The cassette and cassette parts are parameterized, ie the set parameters that make up the cassette and cassette parts can be automatically adjusted as needed. Such as the length, width and height of the carton; the length of the line, the angle of inclination, the radius of the arc, the starting and ending angle parameters, and so on.
The simplest way to use Abnormal Carton to design a special-shaped cartons is to call the cassettes in the existing cassette library, that is, to input the design parameters of the carton, such as the length, width, height, paper thickness, etc., to obtain the profiled cassettes. design diagram. If the existing cartridge map can not meet the requirements of the design, the designer can also call the parts in the library to synthesize a new cartridge chart by the splicing technology and store it in the cartridge library; if the required cartridge parts There is no part library, can not be assembled from the existing box-chip parts, designers can also design their own needs of the box-chip parts and store it in the cassette library. In the design process, the selection and splicing of cassette parts are achieved through human-computer interaction.
2. Combination technology
The basic idea of ​​the splicing technique is to compose complex objects with simple regular-shaped geometry. The splicing algorithm differs greatly depending on the entity representation and data structure chosen for each system. From a topological point of view, the merging operation classifies the points of the participating objects and finds the set of points that make up the result of the operation. Shaped cassettes are flat graphics that are simpler than three-dimensional solids.
3. Box part
1) Formation and division of box parts
A box piece part is a closed plane pattern enclosed by a strip edge, and the lines constituting the box piece part can be divided into border lines and non-boundary lines, and the border lines are further divided into connectable edges and non-connectable edges. All of the boundary lines constitute the closed outer boundary of the cassette parts, and only the connectable sides can be shared by the two cassette parts to form the connecting parts of the two cassette parts. When the box piece is not connected to the box piece, its periphery is a single solid line representing the contour cutting line; after the box piece is inserted, the common sides of the two box piece parts correspond to the indentation lines in the actual box piece. Each individual face of the carton can be divided into a box piece. The basic principle for splitting a box piece into a box piece is that each individual plane after the box is split into a box piece, for some structures. There are two or more faces that are closely related, but they can also be combined into a box piece to be considered.
2) Flattening of box parts
When the box piece is assembled into the box piece, only one side of a piece of the box piece is determined to be connected to one side of other box piece parts, and the shape of the box piece cannot be uniquely determined, and the box piece parts must be transformed to determine the relative Location and so on. As long as the first part is determined, after each subsequent part is selected, it is determined in sequence whether or not it needs to be transformed and the distance between the end of the edge of the part that is later connected to the cassette and the starting point of the side to which it is connected, and finally the composition can be uniquely determined. Box slice illustration.
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