Experts talk about corrugated paper procurement - paper design

The paper design of the second carton factory

Maybe when you see this topic, you will not take it for granted. What kind of paper is used by the carton plant? Is it really what paper the customer uses? It is not so simple. It is well known that the cost of paper in cartons accounts for more than 70% of the cost. With the continuous rise in the price of paper, the sales price of cartons cannot be increased, and the competition in cartons is even fiercer. This proportion is still rising. This indisputable fact determines that carton manufacturers must pay attention to paper and design good paper if they want to gain a foothold in the market and achieve performance.

Satisfying customer requirements is the primary condition for maintaining customer orders. However, this does not mean what papers the customer wants to use. In many cases, carton users do not fully understand the situation of carton matching. The variety of properties of paper crystals varies, and paper is used to make carton boxes for carton users in the various processes of the carton plant. The entire process is subject to various factors that incur unnecessary costs. Therefore, production must be brought into production. The maximum production capacity and reduced production of salted, standard paper is the best entry point for creating and increasing profits. Based on the author's many years of work experience, it is recommended that work be done in the following areas.

â–  Determine the type, specification and door cap of the paper

The carton users faced by the carton factory are involved in all walks of life. The machinery, electronics, food, and so on are really full of everything. The user's requirements are varied. If the paper carton factory is a pair of application paper, it will require many different kinds and specifications of paper, obviously. It does not work. This requires categorizing customers and arranging them. At the same time, we must combine the factory's positioning of customer groups and the performance of production equipment. After a series of analysis and statistics, we select a large amount of products, cover a wide range of products, and adapt to production. The paper used is the basic paper for our factory. This is a process that needs constant consideration and improvement. It is neither static nor changeable, because 'on paper'; Once established, sales, procurement, production and other aspects will be based on this; It can be said that pulling a whole body, do not carelessly.

There are many types of paper, but for cartons, there are cattle, cardboard, corrugated, and whiteboard. Each type of paper has a different quality grade and different weight specifications. Therefore, there are many subdivisions of paper types. The selection should be based on user demand and production adaptation. Basically established basic papers have good coverage of more than 80%. The remaining users generally belong to sporadic small customers or small orders. They can use a combination of adjustable papers to persuade customers to change formulas. Make paper and main customers consistent or similar, if you still can not solve it, you can use abandonment, plate outsourcing or improve the distribution method, of course, increase the loss of paper distribution will be, in this case decide to undertake or not Point is not a simple economic lever.

The determination of the paper width is another very important task. The main basis for selection is the performance factors of the paperboard production line and the intensive degree of the door opening of the order. This work is full of contradictions. The width of the door is convenient, the loss of pull tabs is low, and the utilization rate of rows is high. However, the frequent replacement of paper during production increases the actual consumption of the joints, and the efficiency of pull tabs is poor and the quality is poor; on the other hand, the width of the doors is low. It is advantageous for the production of pull tabs, but the loss of the rows is large. Therefore, when selecting and determining the width, it is necessary to fully consider both the long and the balance. One of the points that must be considered and considered is the need to increase the width of the production line when determining the width of the paper web, and to minimize and avoid the equipment's running time in the small width, because this will greatly reduce the production efficiency and Increase the uneven wear of equipment, shorten equipment life and increase maintenance costs. In production, efforts should be made to maximize the utilization of the width, and the utilization of the width in actual operation can be obtained through statistical calculations as follows:

â–³: width utilization rate;

N: Maximum allowable width of the production line
N1, N2, ...: The width of the door in actual production
A1, A2, ...: The ratio of the amount of paper used in the actual production to the total paper

â–  Purchase of base paper

When the category, size and width of the paper are established, the next step is how to formulate a procurement plan and implement it. Each carton factory is a large-scale factory with a certain scale. The customer groups it faces involve all walks of life, the market is ever-changing, and the order of each customer is different. The carton factory must adapt to and meet this particular market demand. 365 days a year, the carton factory spends every day in constant changes. This special operation mode brings certain difficulties to the formulation of the procurement plan, but the plan is a must, otherwise the procurement activities will It is in chaos and will have a serious impact on production, sales, storage and funding. When formulating a purchasing plan, first considering the basic element of price, you must also consider the following elements: sales plan, production plan, actual usage in the previous months, inventory, plan requirements for the next month, procurement cycle, supply capacity, and others. Elements. The actual operation can be carried out by means of mathematical statistics. Some factors that cannot be quantified can be weighted by coefficients. If you use some simple procedures to calculate through computers, you can greatly speed up the planning process. After the plan is formulated, it must be tracked from time to time in the implementation process so that the plan is not only operable but also has high accuracy.

One of the monitoring focuses that cannot be ignored in the implementation of the procurement plan is the quality of the paper. We often perform a series of quality inspections on the base papers purchased from the factory. The testing focuses will generally be on grammage, moisture, breakage resistance, and ring pressure; the specified indicators, of course, these indicators must be detected and meet the requirements, but There are also some other factors that we do not care about. Such as the stability of the surface color of the linerboard paper, moisture in the longitudinal and transverse directions, vertical transverse shrinkage, rewinding and roundness, core strength and so on. These elements are often overlooked by our procurement staff, and it is these factors (especially some that cannot be quantified) that have a serious impact on the efficiency of production, the quality of the products, and the loss of paper in actual operations. to. For example, we will certainly detect moisture, but we will not care about its distribution. If the moisture distribution in the vertical and horizontal direction of the paper is particularly different, the operators will not be able to effectively adjust the use of the paper will cause the distortion of the plate and can not guarantee the high-speed operation of the production line; If the roll is not good, there is a situation in which the difference in coaxiality is uneven. In actual use, there will be variations in the vertical and horizontal tension of the paper, which will make adjustments frequently and even very difficult to seriously affect the speed and product quality. Therefore, we must have a comprehensive and comprehensive evaluation of the quality of paper, both to meet customer requirements for the product but also to meet the needs of the production process, which is particularly important for high-speed cardboard production line.

â–  Use and storage of base paper

How to make good use of qualified raw papers imported into the factory is an important part of the design of carton paper. Of course, the use mentioned here does not involve technical aspects and discuss management scope. In order to improve the efficiency of cardboard production line and reduce the loss, in the actual use of the process must pay attention to the production line operation planning and zero paper management work.

The key to the production planning of the pull tabs of the production line is to rationally and scientifically classify and match the papers used for processing orders according to different widths, types, and specifications in order to reduce the frequency of changing papers and changing the width of the production pull tabs, and to increase production. Efficiency and reduce the loss of base paper caused by frequent paper change, at the same time must also take into account the post-printing process plan and order delivery requirements.

There is an important part of the paper process that must be taken seriously. That is zero paper management. The so-called zero paper refers to a small roll of paper that has been retired after the production line has not been used up. Managing zero paper is an important part of improving paper use law. In the carton factory, small and small paper rolls are often used to make full use of the cost of the carton to improve many, but to manage the zero paper is also a need to do a good job and hard work to do a good job. For example, when the base paper is issued, the appropriate paper roll should be selected according to the length of the order; when the large order is processed, the zero paper should be inserted in due course. This will not affect the production efficiency but also can digest the use of zero paper; should control the remaining length of zero paper, must not produce a small length of zero paper, often this zero paper can not be on the machine; some zero paper can be made Paper or core paper; some of the long-line orders can be used up to the end of the paper roll. In short, there will be various problems in practice. The key is to attract sufficient attention and there will always be corresponding solutions.

The storage of raw paper is also a necessary part of using good paper. Storage does not create value only costs, so how to reduce costs is the purpose of storage. Attention must be paid to the conditions of storage to avoid affecting the quality of paper; to facilitate access to avoid unnecessary movement, care should be taken to reduce and eliminate damage. Using barcodes to manage the base paper is a very effective method. Each roll purchased has a unique code. This is very convenient for the entry, exit, storage, statistics and accounting of the base paper; it is true, and it can be established that the original paper is aged to be first-in, first-out.

(author/single root)

Corrugated Boxes June 2005