Structural design and manufacture of paper packaging container. Drawing design symbol and paper packaging size definition: 1, cutting, folding, slotting symbol 2, sealing symbol 3, handle symbol Paper packaging size definition: The volume size of paper packaging refers to the internal size, which can be expressed by Li*Bi*Hi for a right-angled hexahedral paper packaging container, and the volume size of paper packaging refers to the external size, which can be expressed by Lo*Bo*Ho and can be manufactured. 1) size code 2) size direction: the horizontal direction of the drawing; The graph rotates 90 degrees clockwise along the first vertical direction. (Numbers only, unit: mm) Second, the basic elements of the folding carton: the main structure-the structural form that constitutes the box-shaped main body of the folding carton; Local structure (molding method)-the structural form that constitutes the local part of the carton, such as the lid; Characteristic structure-the structural form that can best express the characteristics of cartons. 3. Definition of the shape and structure of the tubular folding carton: 1, and from the shape: H>L & gtB2. Structurally: in the process of carton forming, it is a carton formed by folding a piece of cardboard, and the edge seams of the cardboard are bonded or nailed firmly, and the lid and bottom of the carton are fixedly sealed by wing components. 4. Rotational molding characteristics of tubular folding cartons: 1. Rotatability: that is, the characteristic of continuous rotational moulding around the intersection line of each body panel. 2.a Forming angle α: the angle formed by the bottom edge (top edge) of two adjacent body panels after molding. 3.b. Forming angle γ: the angle formed by the bottom edge (top edge) of each body plate and the rotating shaft after forming. 4. Rotation angle β: During the molding process, the bottom edge (top edge) of every two body panels rotates with their intersection point as the rotation point. 5. Formula for solving rotation angle: 5. Plug-in box cover type: reverse insertion (standard/normal); In-line (standard/aircraft type) VI. Design points and methods of continuous flap folding (flower lock) box cover: a. Design points: coincidence point position+flap folding lock; B. The design of coincidence point on the N-shaped box cover: the center point of the box cover coincides with any point of the box cover; C. design of coincidence points on any n-shaped box cover; Seven. Lock bottom type (65438+) 2.5-hour quadrilateral lock bottom box structure: VIII. Structural characteristics and molding technology of automatic bottom locking box bottom: Structural characteristics: The key structure of the self-locking box bottom is a folding line with the bottom of the carton, and the outer δ point will be bonded with the adjacent negative to form the bottom lock. The main structural feature of the automatic bottom lock structure is that it can still be folded into a flat plate after molding. Molding process: 9. Prerequisite and design method for designing self-locking box bottom: Prerequisite for designing self-locking box bottom structure: 1. After the two indentation lines are folded 180 degrees in the height direction, the corresponding positions of the two ends of the box should coincide. 2. The bottom of the box is 2n-sided. 3. The opposite side of the bottom of the box is equal to the diagonal. Design method: 1) B Forming angle γ 2 of body plate connected with auxiliary wing; 2) The optimal forming angle γ1of the fuselage panel connected with the main wing; Attachment angle δ; Bonding residual angle δ′ X. Definition of the shape and structure of the disc folding carton; 1, from styling: L & gtB& gt；; H2。 Structurally, a piece of cardboard is folded at a right angle or an oblique angle to form a main box shape, which is locked or glued at the corners. If necessary, the body panel can be extended to form a box cover. XI。 Forming methods of tray folding carton: 1, assembly molding 2, locking molding 3, adhesive molding 12, characteristics and structural types of lid tray folding carton 13, structural characteristics of inner folding and outer folding of tray automatic folding carton 14, design and calculation of inner/outer folding angle of tray automatic folding carton: Arrangement quantity: m×n, and n partitions need to be designed. Each partition should be designed with M- 1 partition, and the middle partition should be added when n≥2. A, partition structure B, connection mode of partition and box m× 1 formula: m×2 formula: XVI, design of handle structure and easy-to-open structure: 1, position of handle: a, handle is arranged on the cover plate or the extension of the cover plate with legend; B, a handle is arranged on the box body plate; C, arranging a handle at the extension part of the partition board in the box body. 2. Handle hole size design: handle extension structure (diagonal position): round handle box: 1, position of easy-to-open structure on the carton 2, easy-to-open mode A, tear seam B, half tangent line C, perforation line/suture line D, tear perforation line 3, easy-to-open structure type A, disposable opening structure B, sealable easy-to-open structure C, and easy-to-open structure that can be used by stages/ Expression of corrugated board: 1, base paper type/basis weight/number of paperboard layers/number of corrugated boards; 2. Basis weight/number of corrugated boards/number of corrugated boards; Example: 293/240-1511c; 293/240/293— 155/2AB3。 Example of cardboard code representation: s-1.1; D-2. 1 XIX。 International carton box types and their characteristics: 1 type and 02 type-slotted carton represents a piece of cardboard, and there is no separate upper and lower rocking cover. The conjoined upper rocking cover and lower rocking cover can close the carton. Cartons joined by general manufacturers are bonded by nailing, gluing or tape paper in carton factories. Type 2.03-Nested carton: that is, cover type, which consists of more than two independent parts, and the box body is separated from the box cover. Type 3, 04 —— Folding carton and tray: Generally, it consists of a piece of cardboard, and the bottom plate of the box extends to form a box plate and a cover plate, which can be molded even without staples or tape. 4. Sliding carton: 05 consists of an inner box, a frame and an outer box, and the inner box and the outer box are sealed by moving in the opposite direction. Type 5.06-fixed carton: it consists of two separate end plates and a box connecting the two end plates. Type 6.07-Pre-bonded carton: It is mainly made of a piece of cardboard, which is transported into a flat shape and can be used as long as it is unpacked. Comprises a self-locking bottom box and a disc-type automatic folding paper box. In addition: 01-commodity cardboard, mainly used for centralized board when making boxes, and distributed among manufacturers. 09—— Internal fittings, including lining board, cushion pad, partition board, partition board, etc. , can be combined with carton design, can also be used alone. Twenty, corrugated box size ratio and influencing factors; 1, and the aspect ratio rl = l/b; The aspect ratio RH = h/b.2. Factors affecting the size ratio A, the amount of cardboard (the minimum amount is when L: B: H = 2: 1: 2) B, the influence of the compressive strength RLRH on the compressive strength C, the influence of the stacking state RLRH on the stacking performance D, the aesthetic factor golden ratio integer ratio 2 1, the arrangement of contents and its design calculation; 1, arrangement number n=nL×nB×nH2, arrangement direction 3, arrangement mode, that is, the combination of arrangement number and arrangement direction. Exercise: A liquor was packed in 020 1 corrugated boxes, with 24 bottles in total. The overall dimension of the product is 82mm×57mm×260mm, and the reasonable layout is selected. Determine the arrangement direction of contents → comprehensively consider the optimal size ratio of corrugated boxes → calculate the arrangement number in all directions. Influencing factors: the maximum size and quantity of products, the arrangement of packaging materials, product characteristics, the limitations of corrugated board production equipment and printing equipment, and the related dimensions of spacers and buffers in the box. 1, design and calculation of inner diameter dimension a, in-line calculation formula Xi = xmax× NX+d (NX-1)+k'+TB, staggered calculation formula Li = nd+(n-1) d+k+TBI = d+d (m calculation. The influence of corrugated board bending (thickness) and the correction of manufacturing size to meet the requirements of inner diameter C. Analysis of remaining manufacturing size of corrugated box ① Joint size J② Butt rocker size F 309 type accessories manufacturing size, such as lining and partition ④ Lock bottom structure size ⑤ Lock pin structure size 3. Design and calculation of outer diameter dimension A. Calculation formula X0 = xmax+t+k = xmax+k For example, a Chinese liquor is packed in 020 1 corrugated paper box, and 24 bottles are packed, and the overall dimension of the product is 80. Select 0933 5×3 partition, and find the manufacturing size (design drawing) of the carton. Note: AB cardboard is used. 23. Machine-made carton die-cutting and box-making: die-cutting: 1, die-cutting 2, indentation 3, die-cutting and box-making: 1, box blank folding 3, basic requirements for tab bonding: straight lines and aligned box surface patterns; Carton seams do not blurt out, and cartons do not stick to each other. A. irregular straight line gluing machine, as shown in figure B. regular straight line gluing machine, as shown in figure C. right-angled gluing machine, as shown in figure 24. Cutting, Indentation and Splicing Process in the Manufacturing Process of Corrugated Box: 1. Cutting indentation process A. Cutting: to prevent "closed mouth" phenomenon (