Price calculation formula for carton
CARTON: (LENGTH + WIDTH + 8) / 100X (WIDTH + HEIGHT + 6) / 100X UNIT PRICE (YUAN/CM2)<~~~ This size is the inner diameter size.
Medium box: {(length + width)*2+4}/100x{(width + height)*2)}/100*unit price (yuan/CM2)<~~~ This size is the inner diameter size.
CARTON: (LENGTH + WIDTH + 7)/100X (WIDTH + HEIGHT + 3) / 100X UNIT PRICE (YUAN/CM2) <~~~ This size is the outer diameter size.
Inner carton: (length + width + 7) / 100x (width + height + 3) / 100x unit price (yuan / CM2) <~~~ This size is the outer diameter size.
Among them, the unit of length, width and height is CM, and the carton depends on its material to set the price, and the current price of the conventional outer box is 6.5 yuan/m2.
The price calculation formula for the color box
The unfolding area of the color box (M2) X coefficient (3.8~4), if laminated, the coefficient is 4.8
The expanded area is calculated as [(length + width) X2+3] / 100X [(width X2 + height) + 2] / 100
WHERE THE LENGTH, WIDTH, AND HEIGHT ARE CM, FOR EXAMPLE, THE SIZE OF AN UNCOATED COLOR BOX IS 7X 6X 16CM
Then the expanded area is [(7+6)X2+3]/100X[(6X2+16)+2]/100=0.087M2
The approximate price of the color box is 0.087X4=0.35 yuan
Note: This estimation method can only be used for smaller color boxes.
The basic cost of general corrugated color box mainly includes: paper cost, corrugated cost, printing cost, glazing, calendering, laminating cost, pasting salary and taxation, etc.
There are generally two specifications of paper: standard gauge 78.7X109CM and large gauge 89X119CM
The calculation method of the color box price is to calculate the number of boxes that can be made according to the actual unfolded size of the color box, and calculate the number of boxes that can be made according to the standard size (or large size) Get the free procurement course to pay attention to the official account of the business school of procurement, so as to obtain the cost of paper for a single box, plus corrugation, printing, glazing, calendering, laminating and taxation.
The general standard printing is 0.10 yuan/color, the glazing is 0.30 yuan/m2, the calendering is 0.60 yuan/m2, the laminating is 0.60~0.80 yuan/m2, and the corrugated is 1.50~2.00 YUAN/M2.
Generally, the cost of calculating the color box needs to add the plate making fee and the knife mold fee, the ordinary size plate making fee is 300~600 yuan, and the knife mold fee is 150 yuan.
* PVC box or PVC barrel, calculated by weight, generally 0.025 yuan / gram. For example, if a PVC box weighs 20 grams, the cost is about 20*0.025=0.50 yuan
* PVC blister shell, calculated by weight, generally 0.02 yuan / gram. For example, if a blister weighs 20g, the cost is about 20*0.02=0.4 yuan
* Black character sticker price on white background: generally 0.001 yuan/CM2 to calculate. For example, the price of a 5*5CM sticker is: 5*5*0.001=0.025 yuan
Do you know how to calculate carton weight?
The measurement of carton weight is an important task in the carton factory, which needs to measure the box weight in export customs declaration and when counting output. Not only that, some customers even use the box weight as one of the criteria for carton incoming inspection. Although the carton weight test method is extremely simple, it is easily affected by moisture, causing the box weight measurement to deviate from the true value. In addition to providing box weight measurement methods, this article also focuses on two easy-to-operate box weight estimation methods, which can greatly facilitate carton factories to control carton weight.
How to measure box weight
For electronic balances with an accuracy of more than 1 gram, the weighing range should be 0-5 kg.
Selection of specimens
Three specimens were randomly selected from the same carton for testing.
Specimen handling
The specimen is processed in accordance with the GB/T 10739 standard, that is, it is balanced for more than 24 hours in an environment of relative humidity (50±2)% and temperature 23±1°C, and then weighed. The temperature and humidity balance treatment of the sample is very important to obtain an objective and consistent box weight, and the measured box weight error can reach more than 15% by receiving the free procurement course focus on the procurement of the sample without the temperature and humidity balance treatment. For example, if the weight of a carton that has undergone temperature and humidity balance treatment is 1 kg, it will not be treated in a warm and humid environment, even if it is the same carton, its box weight may be between 960 grams ~ 1150 grams.
Test results
The box weights of the three specimens are tested separately, and the average of the three weight values is calculated, i.e. the individual box weights of this batch of cartons.
A quick way to test box weight
The most troubled factor in box weight measurement is the moisture content of the carton, and many carton factories or carton customers are limited by delivery time or test conditions, and weigh without temperature and humidity balance treatment, resulting in the significant deviation of the box from the true value. Here, we provide you with a way to accurately test the weight of the box without temperature and humidity balance.
The principle of fast box weight measurement
A large number of experimental data show that the moisture content of the carton is about 8% after the standard temperature and humidity environment is fully balanced, and the dry weight of the carton is unchanged. Therefore, we only need to measure the weight and moisture content of the unwarmed and wet balance carton, and we can calculate the true weight of the carton.
Measurement tools
Electronic balances, ovens or digital infrared moisture testers with an accuracy of more than 1 gram. The oven can be used to test the moisture content of the carton, but it still takes 1 hour of test time. The digital infrared moisture tester can instantly read out the moisture content of the carton, and its accuracy can reach more than 1%, which can fully meet the needs of accurate moisture detection.
Measurement method
1. Three cartons are randomly selected from a batch of cartons as test samples.
2. Weigh the box weights of the three samples separately and take the average value. The measured value is the reference weight, expressed in Mc, in "grams".
3. Then measure the moisture of the three samples separately, take the average value, and the measured value is expressed by W in "%".
4. Finally, the measured Mc value and W value are substituted into the formula, and the standard value after temperature and humidity equilibrium can be calculated, which is expressed by M. Calculation formula for TEU weight: M = Mc×(1-w)/92%
Example
Three samples were extracted from a batch of cartons, the average measured box weight was 1285 grams, the measured average moisture was 13%, and the free procurement course paid attention to the public number of the Procurement Help Business School Try to calculate the box weight value after temperature and humidity balance treatment, and substitute the above value into the formula: M = Mc×(1-w)/92%= 1285×(1-13%)/92%=1215g
How to estimate the box weight
The calculation method of carton weight is actually relatively simple, that is, the weight of each layer of base paper that makes up corrugated cardboard is added separately, and the weight of the adhesive in the cardboard can be added to obtain the weight of the carton. The weight of the surface, middle septum and inner paper is the area of the corrugated board multiplied by the grammage of the base paper, and the weight of the pit paper is the product of the corrugated board area, the corrugated elongation coefficient and the grammage weight of the base paper. The weight of the adhesive can be calculated from the parameter table.
Carton weight estimation formula
Weight of single pit cardboard: Ws=S*(G1+G2+R*Gm+g1)
Double pit cardboard weight: Wd=S*(G1+G2+G3+R*Gm+R1*Gm1+g2)
Three pits cardboard weight: Wt=S*(G1+G2+G3+G4+R*Gm+R1*Gm1+R2*Gm2+g3)
In the formula: Ws, Wd, and Wt represent the weight of single, double and triple pits of cardboard, respectively; G1, G2, G3, G4 grammage (g/m²) of corrugated cardboard paper, lining paper and middle separator paper per unit area; R,R1,R2 indicates the corrugated elongation coefficient; Gm, Gm1, Gm2 respectively indicate the grammage of the core paper (g/m²); G1, G2, G3 indicate the grammage of the corrugated cardboard adhesive (g/m²), respectively; S indicates the area of corrugated cardboard.
annotations
1. The area of corrugated cardboard can be obtained by actual measurement or by calculation.
2. The width of the sticky strip is 40mm by default, except for special circumstances.
3. The weight of the grooved material of the carton can not be considered, and the touch added to the lid of the general carton can basically be offset by it.
Example
There is an ordinary flat mouth carton, the paper configuration is 250K/112F/112F/112F/250K, and the external size is 1400px×1000px×325px, try to calculate its customs declaration weight. The area of the ordinary box S=(w+h)*2(l+w)+glue strip area = (40+13)cm*2*2400px+100px*13»1.02m², the elongation coefficient of A flute is R=1.53, the elongation coefficient of B flute is R1=1.40, and the amount of adhesive per square meter g=15+20=35g/m²
Substituting the formula Wd=S*(G1+G2+G3+R*Gm+R1*Gm1+g2)=1.02 *(250+11 2+250+1.53 *112+1.40*112+35)=1.02 * 940=959g
Tolerance standards for carton weight
The tolerance standard of general box weight should be set within the range of ±4%, because the tolerance of the base paper that makes up the carton and the adhesive itself is also in the range of ±4%. Some carton customers do not understand this law and set the box weight tolerance within ±2%, which is difficult to achieve.