The model is GT100 rear seat color box, the outer size is 415 * 65 *, because the outer size of the color box width is smaller, according to the requirements of the enterprise standard Q / GTS C0002-2001B, the box is not tested for top pressure items, but for end pressure items test. The bursting resistance standard requirement is ≥1.0Mpa, and the end compression strength is ≥200kgf.
During the end pressure test, the front and back rocking covers of the box are in the state of vertical tiles, and the side and side rocking covers are in the state of horizontal and vertical tiles, which brings great difficulty to the calculation of the theoretical value of the Maki formula's compressive strength. If the comprehensive horizontal and vertical corrugated end compressive strength of the carton lying in the end pressure test cannot be correctly predicted, the material configuration of the corrugated base paper of the color box cannot be correctly predicted, the price of the box cannot be correctly predicted, and the color box is also mass produced. And quality assurance brings confusion.
This paper classifies and calculates the compressive strength of the front and back rocking lids in the vertical tile state during the end pressure test, the four side rocking lids in the horizontal tile state during the end pressure test, and the cardboard on the side of the color box, which can effectively predict the comprehensive state of the horizontal and vertical corrugations. The calculation method of the carton end compression strength is not mature enough. It is a kind of initial attempt to apply the Maki formula, and it needs to be gradually improved in practice.
1. GT100 rear seat color box material, external dimensions, rocking lid structure
The GT100 (rear seat) color box material printed by the packaging company is facial paper: Tianting / m2 white board with gray background, corrugated: T2 / m2 Hailong brand renewed cattle card, and inner paper: Hailong 140 / m2 Hailong brand cattle card. The surface is covered with BOPP dumb film: Part No. PP-18, Starlight did not provide data such as thickness and burst resistance index. After testing, its bursting strength is 145Kpa.
Tianting gray board: lateral stiffness ≥4.75 mN.m (Remarks: no lateral ring pressure index data, the lateral ring pressure is temporarily based on 6.0 Nm / g), the burst resistance index ≥2.41 Kpa.m2 / g, the reverse side ≥1.83 Kpa .m2 / g, average burst resistance index ≥2.12 Kpa.m2 / g
T2: / m2 Hailong second-class recycled cattle card: ring pressure index ≥6.0 Nm / g, burst resistance index ≥2.2 Kpa.m2 / g
Hailong 140: / m2 Hailong second-class cattle card: ring pressure index ≥ 7.4 Nm / g, burst resistance index ≥ 2.4 Kpa.m2 / g
Outside dimensions of GT100 rear seat color box: 415 * 65 *
Shake cover: On the basis of the 0203 stacked rocker cover, the rocker cover on the front and back has a long tab and a lock hole structure on the front.
2. Calculation of theoretical value of bursting strength
A. Calculation of theoretical value of burst strength in uncoated state
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