Section I appearance inspection of corrugated boxe

Section I appearance inspection of corrugated cartons

I. classification has been rapidly promoted all over the world.

according to the maximum internal comprehensive size, the maximum mass of the contents and the types of corrugated cardboard used, corrugated cartons are divided into eight types (see table 22)

table XXII

maximum weight of type contents (kg) maximum comprehensive size (mm) Single tile

corrugated

box type 1, type 2

type 3

type 4 10 20

30

40 1000 1400

1450

2000 double tile

corrugated

box type 1, type 2

type 3

type 4 20 30

40

50 14001750

2000

2500 note: when the maximum internal comprehensive size and maximum mass of the corrugated box are not the same type, the higher type should be selected

II. Inspection items and technical requirements

eleven appearance inspection items are specified. Eight of them are light defects and three are heavy defects. The projects with light defects are: signs, printing, indentation lines, knife edges, box nails, bonding, JEC group predicts that the value of the composite industry will reach US $103 billion by 2021, and the mounting and shaking cover will be folding resistant; The items with heavy defects are internal size, thickness and moisture content (see table 23)

table XXIII

the remark mark of the project technical requirements shall be printed with the code and code specified by the commodity inspection department on the carton according to the provisions of gb191. The printed carton surface pattern, the text shall be clear and correct, the depth shall be consistent, and the position shall be accurate. The indentation line indentation line width: single corrugated carton shall not be greater than 12mm; The double corrugated box shall be no more than 17mm, the fold line shall be in the middle, and there shall be no cracks, broken lines, heavy lines and other defects. There shall be no excess indentation lines on the box, and the knife edge shall be free of obvious burrs. The distance between the paper crack and the edge in the cutting edge shall not exceed 8mm or 12mm. The diameter of the folded corner hole after the box is formed shall not exceed 5mm. The box nails shall be made of coated mild steel flat wires, and there shall be no rust spots, peeling, cracking or other defects in use. The spacing shall be uniform, and the distance between single nails shall not be greater than 55mm, and the distance between double nails shall not be greater than 75mm. The distance from the head and tail nails to the indentation edge line is 13 ± 7mm. The nailing joint shall be nailed firmly and thoroughly, and there shall be no defects such as overlapping nails, warped nails, non rotating nails, etc. the measurement of nail spacing refers to the distance between the two nails at the opposite position, and the width of the overlapping tongue of the combined nailing is mm. The box nails shall be nailed along the center line of the overlapping tongue, arranged neatly, and the deflection shall not exceed 5mm. The width of the bonding lap tongue shall not be less than 30mm. The adhesive shall be applied evenly, fully and without overflow. When the bonding surface is stripped, the face paper will not separate. The two joints of the carton are aligned with scissors; Large box is not more than 7mm; The medium-sized box is not more than 6mm; The small box is not more than 4mm, and the box is square. The scissors difference: measure the difference between the two knives at the indentation line at the upper and lower ends of the joint part. The paper mounted on the box shall not be spliced, lack of materials, exposed ridges, wrinkles, glue penetration, and stains. The splicing of paper in the box shall not exceed two, and the distance between the splicing joint and the indentation line of the rocker cover shall not be less than 30mm; The degumming surface is not more than 20cm2 per square meter; There are no more than 3 large box edges and no more than 2 medium and small box edges. The adhesive is starch adhesive or other adhesive with the same effect. Sodium silicate shall not be used. Degumming area refers to that after the non bonded or pseudo bonded part of the paperboard is supported or shaped by the folding carton, the flap is opened and closed 270 degrees, and it is reciprocated three times. There is no crack in the surface paper and the inner paper. The inner size carton type

large, medium and small cartons are supported and shaped, and the included angle of the adjacent surfaces is 90 °. Measure the length and width of the carton with an inner diameter ruler on the lap tongue 50mm away from the opening of the carton; Measure the height, length and width of the box by the distance between the two inner swing covers at the bottom and top of the box High single limit deviation mm +5 -3 +4 -3 +3 -2 thickness single corrugated box plate double corrugated box plate thickness refers to the distance between the upper and lower parts of the corrugated plate. According to gb6547, a ≥ 4.5 A.A ≥ 9.0 C ≥ 3.5 a.c ≥ 8.0 B ≥ 2.5 C.B ≥ 6.0 e ≥ 1.1 C.C ≥ 7.0 A.B ≥ 7.0 moisture content. The moisture content of corrugated boxes should be 12% ± 4% tested by rapid moisture determination method or oven determination method. Note: the comprehensive dimensions of large, medium and small-sized inner boxes are respectively; Greater than or equal to 2000mm, less than 2000mm and greater than 1000mm, less than or equal to 1000mm

III. inspection method

inspect item by item according to the technical requirements in the appearance inspection items, which must be stipulated in the regulations. The inspectors used in the inspection include: steel tape, inner diameter ruler, wooden ruler, guiding gauge, special sampler (as shown in Figure 2. Power problem: turn on the experimental motor source 24), paper cutting tool, etc

the following is a brief introduction to the inspection of inner diameter dimension, moisture content and thickness of corrugated cardboard

inner diameter dimension 3 For speed adjustment, open the leftmost cabinet door and the reducer cover door on the console