In the production of three-dimensional cards, the X-shaped structure means that two completely symmetrical figures are assembled at a certain angle and then pasted onto the square frame structure to form A card form with strong three-dimensional effect.
Brief explanation of some concepts in the above description:
A symmetrical figure means that a figure can be completely folded in half from a certain line in the middle as a crease, and the crease is called the "line of symmetry".
Assemble at a certain angle. The assembly here refers to the insertion of two symmetrical figures through a small opening. It can be seen as an X shape from the top or bottom.
Square frame structure: an open box (without lid and bottom) that can be made from a strip of paper, with all four sides being equal lengths.
(In the production of some more complex three-dimensional cards, asymmetric graphics may be used. At this time, many structures including the square frame need to be changed, which will be discussed later)
Create symmetrical patterns
Cut out two completely symmetrical figures, and then make grooves along the symmetry line, usually to about half the height. One needs to be cut from the top, and the other needs to be cut from the bottom. The slot itself also has requirements for width. It cannot be too narrow, like cutting a line. This structure is not conducive to splicing.
Then assemble the two figures together so that the X-shaped structure is completed.
Then you need to make a square frame structure
After the production is completed, attach the X-shaped symmetrical figure made previously to the square frame structure.
As for how to make a square frame, a little explanation is needed here. First flatten the X-shaped heart-shaped structure made earlier, and then measure the length from the slot to the edge. And this length will be the edge length of the square frame structure. However, when making building materials strips, you need to leave a little more, because if you want to close the square frame, you need to use the remaining bit to glue it.
Then we will flatten the X-shaped heart-shaped structure and the square frame, and glue them together so that the vertical edge of the square frame coincides with the symmetry line of the X-shaped heart shape.
Expand both models as shown below.
Then flatten it according to the following pattern.
Then glue one edge of the square frame to one side of the card, and apply glue to the other edge so that one vertical edge of the frame coincides with the symmetry axis of the card.
Open it and see the effect of the three-dimensional card you made!