How to request the quality of corrugated carton

With the continuous development of Haier's product quality and popularity, Haier is paying more and more attention to the quality of its packaging products and the quality management of packaging suppliers, especially the quality of corrugated boxes used for product packaging.
Quality management of packaging suppliers Quality development of packaging suppliers helps packaging suppliers establish and improve quality systems, and recommend advanced quality management techniques and methods to suppliers. They occasionally conduct training exchanges and strengthen communication with packaging suppliers. In order to optimize the quality of packaging products, enhance the quality development capabilities of packaging suppliers, and constantly strive for perfection and excellence, so as to meet the growing quality requirements of Haier Group.
Packaging supplier quality assessment Packaging supplier quality assessment is a means of evaluating the quality of packaging suppliers, through the packaging supplier's production efficiency, production cycle, production rate, delivery time, technical capabilities, new product development Quality assessment of capabilities, equipment maintenance, management information system evaluation, quality policy, quality system, preventive measures, corrective measures, quality improvement, etc., strengthen quality management of packaging suppliers, can effectively reduce scrap rate, shorten cycle time and delivery period. The quality assessment of packaging suppliers adopts a systematic evaluation method and a quantitative evaluation method. Systematic assessment method is a method of qualitative evaluation of a certain system. Quantitative scoring method is a method to determine the quality level of packaging suppliers by quantifying a certain element and then based on the results of actual scoring.
The quality management of packaging products generally strengthens the quality control of corrugated boxes from the following aspects and assists the quality improvement of packaging suppliers:
The inspection of the scar on the surface of the packaging box and the control of the surface of the corrugated cardboard box are affected. The overall visual appearance of the packaging box is impaired, and the hand feel is not smooth, and the requirements for refined appearance cannot be satisfied. Mainly due to poor use of facial paper, caused by low gram weight, followed by the production process of corrugated cardboard, improper control of the humidity of the tissue.
Strengthen the control of the incision of the box cover is mainly reflected in the phenomenon that the box cover incision exceeds the fold line of the box cover or the corner of the box after the box has a hollow hole, resulting in an increase in stress at this time and easy to make the box There is tearing at the place. During the inspection process, the top of the carton incision is strictly controlled at the middle position of the folding indentation line, and the incision is ensured to be in line with the folded indentation of the box body.
Controlling the smoothness of the surface of the carton The curvature of the corrugated carton will cause folding of the carton during stacking, resulting in reduced load-bearing capacity of the carton. At the same time, the carton should be used within the shortest possible time to avoid long-term storage. The appearance of surface warpage caused by natural air drying. The main reasons that affect the flatness of the cardboard are:
1. The type, grade, and main technical parameters of the paper are different.
2. The moisture content of the same batch of paper is different. Part of the paper moisture content is greater than the other part of the paper or paper between the ends, the outer edge side and the inner core side of the water content is different.
3. The length of heating surface of the paper (wrapping angle) of the preheater is improperly selected and adjusted, or the length of the heating surface (wrapping angle) cannot be arbitrarily adjusted. The former due to improper operation, the latter due to equipment limitations, affecting the preheating drying effect.
4. The steam spray device cannot be used properly or there is no spray device on the device, so the humidity of the paper cannot be arbitrarily increased.
5. After the paper is warmed up, the water is not distributed in sufficient time or the ambient humidity is high, ventilation is poor, and the speed of the production line is improper.
6. Unfavorable sizing and uneven gluing of one-sided corrugating machine and gluing machine lead to ununiformity in the introduction of cardboard.
7. The steam pressure is insufficient and unstable. The steam trap and other accessories are damaged or the water in the pipeline is not drained. As a result, the preheater cannot work normally.
8. The speed is not coordinated with the hot plate temperature control.
Pay attention to the control of the quality of the binding of the box The binding quality of the box includes the box pitch and the flatness of the bottom surface after binding. The uneven bottom surface after binding will directly affect the uniformity of the loading force of the packaging box.
Strengthen the control of packing box materials Control the packing materials used by suppliers. For example, after sampling the packing box, soak the samples with water, iron the layers with an electric iron, or sample and measure the weight of the board. Quantify the paper used to compare whether the supplier used the specified raw materials as required.
Strictly controlling the physical properties of the board requires that the physical properties of the box be formulated in accordance with national standards, with the emphasis on controlling the burst strength, side pressure strength, and puncture strength of the board, setting up on-site sampling plans, and sampling and testing on a daily basis.
Preventing the occurrence of dumping phenomenon is mainly caused by the lack of overall strength of the corrugated box, followed by the effect and influence of the environmental humidity, resulting in a decrease in the overall performance of the corrugated box, which is insufficient to suit the use requirements, or is caused by bad binding, or The stacking method causes the stacking of the goods to be eccentric and the local pressure is too large, resulting in the damage of the carton packaging. (Qingdao Haier Quality Inspection Co., Ltd. Packaging Branch Chi Xiaomei Wang Bensheng)