Chapter 2 Design and Manufacturing of Carton Structure
Section 1 folding cartons
First, a folding packaging carton is the most widely used and has the most structural changes in sales packaging containers.
1 It is made of cardboard with a thickness of 0.3~1.1mm.
2 It can be folded and stacked for transportation and storage before the goods are shipped.
Second, the characteristics of folding cartons
1 Low cost, good strength, good display effect, suitable for large and medium-sized production.
2 small footprint.
3 high production efficiency.
4 There are many structural changes.
1 It has a low strength and can only package 1 to 2.5kg of light-weight products. The maximum box size is 200~300mm.
2 The appearance is not elegant enough.
Three, folding cartons of raw materials
Folding carton selection folding paperboard.
Fourth, the main structure, partial knot
Table 1 Folding carton selection board thickness table (contents are not bearing)
Section II tubular folding carton structure
First, tubular folding cartons
1 tubular folding carton
2, rotation, forming angle and rotation angle
Tube folding carton box molding process.
The characteristic of the continuous rotary molding of the tubular folding carton is called the rotation of the tubular folding carton.
A. Molding angle: After forming, the angle formed by the bottom (or top) of the adjacent two body plates is abbreviated as A forming angle.
B. Forming angle: The angle formed by the bottom edge (or top edge) and the rotating shaft. It is called the B forming angle and it is represented by 1 Î³, 2 Î³....
Î² molding angle: In the molding process, the rotation angle of the bottom edge (or top edge) of each pair of body plates with its intersection point as the axis is the rotation angle.
3, the rotation angle solution formula
Second, the lid structure of tubular folding cartons
The lid is a portal for the entry and exit of contents, and the lid structure must facilitate the loading and removal of the contents and does not easily open after being loaded, and can play a role of protection, and is convenient for consumers to open when in use.
The lid has a variety of configurations.
a fixed way:
2, lock type
3. Plug-in type
4. Continuous flap wing type
6. Sealing type
7, flap type
8, prevent illegal opening (anti resealing)
Third, the bottom structure of tubular folding cartons
The bottom of the carton box is mainly subjected to the contents, and is also affected by pressure, vibration, and drop. The general design principle is to ensure both strength and simplicity.
1. The bottom structure of the socket is the same as that of the insert box cover, and the bottom box structure of the carton box is more commonly used.
2. The continuous wing socket type basic structure is the same as the lid, except that the folding direction is opposite to the lid during assembly.
3, lock type
4, the main structure of the automatic lock-bottom feature is that after the molding can still be folded into a flat-shaped transport, reached the automatic packaging line after the carton, as long as the box box machinery opened the box, the box bottom is automatically restored to the original sealed state, the most suitable for automated production .
5. The compressive strength and stiffness of the box with back wall closure are high.
The most common partition type is a 6-space structure, if the carton is separated by 2 in the length direction.
Divide the width direction to 3, then move it to 2 3 Ã—.
Regardless of the thickness of the paperboard, the distance between the first indentation line connecting the LH surface and the bottom line of the box is 1/3 B, and the first indentation line connected with the BH surface at the time of 2 3 Ã— according to the rotation. The distance from the bottom line of the box is 1/ 2 L; at 2 3 Ã—, the distance is 1/ 2 B and 1/ 3 L, respectively.
6, partition self-locking
7, adhesive sealing type with adhesive sealing type.
8, is the closure of the closure type
Fourth, the bisector design
For a part of the folding carton structure, the bisection angle is a unique design technique or an essential structural analysis method.
1. The bisection angle 1 The bisection angle refers to a plane angle on the blank of the folding carton structure, which is divided into two equal angles by its angle bisector. The bisector is usually used as a bisecting line.
2 The bisector of the isosceles triangle The perpendicular bisector of the isosceles triangle is equal to the angle bisector of the vertex angle. That is, the perpendicular line at the top corner of the isosceles triangle is equal to the angle bisector at the top corner.
2. The octagonal tubular folding carton in the bisector of the tubular folding carton.
Tubular folding carton with re-seal structure.