Corrugated board production line scheduling skills

Corrugated cardboard line scheduling, also known as scheduling, is currently divided into two manual scheduling and computer program automatic scheduling. Scheduling is based on the customer's order requirements of the base paper material, type, number of layers, and specifications for system classification, so as to achieve the best arrangement and combination of technical means. The reason why scheduling is a technical means is that it is a key link in the production of corrugated cardboard lines for packaging companies. The utilization of base paper, the production efficiency of tile lines, energy consumption, and even the fatigue of employees are directly related to it. The importance of scheduling is evident here. Scheduling has now paid attention and extensive attention for many packaging companies. At the moment when companies are generally aware that improving ergonomics and reducing costs are effective ways to ensure profit growth, it is of positive and significant significance.

For this reason, some companies have spared no expense in installing tile auto-scheduling software (some ERP systems have scheduling programs), and some companies hire high-paying professional planners to fight. Whether it is installing software or hiring professional schedulers, each has its own advantages and disadvantages. Although the current automatic scheduling software can help us get rid of tedious labor and reduce labor costs, but in the selection of materials, the paper balance of different lengths of cardboard can not be automated, yet the software technicians need to develop and innovate; manual scheduling It can solve the problem that the automatic scheduling can not be solved for a while. It is flexible and flexible for emergency order insertion, and the adjustment of the corrugated board beyond the theoretical range can be adjusted as desired. The inadequacy is easily changed with the emotions and professional qualities of the scheduler. , In addition, it also increases labor costs, especially in today's tight human resources, and skill talents are difficult to recruit today, even more frustrating and annoying. However, the use of manual computer tools for scheduling is still widely used by packaging companies. Obviously it is due to automatic scheduling, the program is not flexible enough, and there is still a place where the software can not completely replace the human brain. If one day automatic scheduling really can replace manual scheduling, it will be a "revolutionary" progress in the packaging industry, with epoch-making significance. Since manual scheduling is used by most packaging companies, and the packaging industry is still inseparable from it, let's discuss scheduling issues and scheduling techniques.

First, the tile line scheduling should pay attention to matters Corrugated cardboard line schedule must pay attention to the following items:

1. Utilization of base paper: In order to increase the utilization rate of base paper, it is necessary to consider not scheduling frequent replacement of base paper, and to try to match orders that can be spelled at the same width once and for all. Even if an urgent single insert is encountered, another one has been replaced. As for the base paper of the door width, as long as the materials are the same, it is possible to place the urgent single row and it looks like a waste of a few centimeters or more than a dozen centimeters of base paper. However, the comprehensive accounting not only does not waste, but saves the time for replacing the base paper and the electricity fee. , energy consumption, and paper waste due to paper change. Also consider the shrinkage of the base paper. Some base papers, especially those containing large amounts of moisture, undergo preheating and traction. The effective width is generally reduced by about 1-2cm. If you do not understand these, the actual production will show slitting. Fringe, cutting is not in place, or the opening of cardboard is insufficient, it is bound to cause waste.

2. The tile line equipment performance: corrugated cardboard line type match, the effective production width, the number of points cut, the minimum and maximum pressure line spacing, cross cut single or double knife, stacking mechanism, the maximum speed, and the degree of automation, etc. considering. Otherwise, scheduling and actual disconnect will cause frequent changes and affect normal production.

3. Technical level and collaboration of tile technicians: This is very important. When the order schedule with trimming is less than 1cm and poor paper pulling force, the technicians of tile technicians are skilled, good teamwork, and can avoid revisions. The waste caused by missing and frequent paper breaks, of course, also avoids the lack of quantity due to waste and the need to re-schedule patches.

4. Turn on time of tile line: Determine the total length of the schedule according to the average speed and working time of the corrugated board production line. If a class is produced, we must first place the urgent single first, followed by the most recent delivery date, and then According to the delivery schedule. Two-shift or three-shift production can be scheduled according to the order delivery schedule. It is worth mentioning here that it is necessary to pay attention to planned start-up time. If the order is sufficient, the dissatisfaction will not only cause production pressure on the next day, but also cause down-stitching and bad work for the next process; if the order is insufficient If the boot time is too short, it will also bring waste to the company.

5. Degree of fatigue of employees: This is closely related to the length of boot time. Employees work continuously for a long time, physical fatigue affects the efficiency of work, and endangers safety. There is no special case that the class should not exceed 8 hours. 6. Scheduler's Responsibility: A qualified scheduler is actually a good dispatcher. He (she) should first have a good professional quality, not affecting work with individual preferences, personal emotions, and personality, and be able to self-discipline. They are sensitive to numbers and have patience. They can consciously perform the duties of the scheduler: According to the production schedule, they can master the production schedule in time, avoid the next process, and do not transfer the process difficulties or troubles to the next process. It is reasonable and effective. Make use of the base paper width to avoid unnecessary waste as much as possible.

Second, tile line scheduling skills Corrugated cardboard line production not only in accordance with the delivery schedule, but also according to the different width of the single, to consider a variety of factors, is a tedious and boring project, in addition to Outside of the technical level, it is technical:

1. System classification achieves the best permutation and combination: The first step is to classify different orders of materials, different types of crucibles, and layers of corrugated paperboards for orders entering the scheduling system; The width of the effective width of the base paper can be used in combination; the third step is to balance the length of the cut in the width of the same base paper. The packaging papers of general packaging companies are stored at an interval of 10cm at a grade. For example, the basic width of the base paper of a packaging company is: 2200, 2100, 2000, 1900, 1800, 1700, 1600. In this way, it is possible to fight single-by-one in the schedule and make rational use of the width of the base paper.

2. Take into account the width of the base paper and the function of the equipment: It is not enough to consider only the width of the base paper when working together, but also pay attention to the shrinkage and stretching of the base paper. Usually, the punching list is set aside for a trimming of 2cm, which is deducted from the actual production process. Shrinkage and stretching factors are sufficient so that they cannot be trimmed to cause burr or edging. We often encounter this situation in practice. We use a 2000-page base paper to waste more than 2cm of trimming. The width of the 1900-web base paper is not wide enough. Sometimes the paper cutter on both sides of the paperboard just rides on the edge of the paperboard. This obviously will not work. At this point, you can reduce the pressure of each cardboard line 1-2mm, or only reduce the height of the carton, the more the opening of the corrugated board, the effective width of the sum is lower than the width of the original paper, cardboard trimming, flashing phenomenon To solve the problem, but must be in the next process before the formation of the carton width and height also make the appropriate adjustments, otherwise there will be no carton flap cover or carton height slotted phenomenon. Of course, according to the actual situation of the customer using the carton, if the packaged product is a stereotyped hard object (beer bottle, utensils, home appliances, etc.) may appear carton flap gap. The general product carton height reduction of 1-2mm is no problem because the customer is not as accurate in designing the carton. In addition, the traction resistance of the corrugated board dryer and the thickness of the edge of the paper separator are also taken into consideration. Dryer traction resistance is large, and the narrowing of the surface tension of the tissue paper may be small, and vice versa; the thinner the paper separation blade of the paper separating machine is, the higher the utilization rate of the base paper is, and vice versa.

3. Balance the upper and lower knife cross-cutting lengths for different orders of the same material: To fight orders not only pay attention to the width of the door, but also pay attention to the cross-cut length. Whether the width of each door is two or more, regardless of the number of meters in the total length of the schedule, the balance between the total length of the upper and lower blades must be guaranteed. In other words, when the production of corrugated cardboard lines is finished, the total length of the upper knife or the lower knife does not appear to be unbalanced. One knife has already been produced and the other knife has not been produced. The knifeboard that has been produced without orders is a waste. The usual practice is to lift the pressure line up and “strike through the board” (the utilization rate of the passboard is generally around 70%, some are even lower, temporarily occupying the space and the tray are not used). Experienced schedulers will order frequently used orders to avoid waste. It is difficult to achieve a complete balance of the total length of the upper and lower knife unless the order length is the same. Some companies classify the length of the balance knife and knife as one of the assessment criteria of the scheduler, and stipulate that the total length of the knife is 500,000 meters per meter, and the total number of unbalanced meters cannot exceed 500 meters; some simply open directly into a box, and many Doing more (do not meet more than one customer, the next time no longer do this specification customers, is a big loss). In comparison between the two practices, the former is obviously superior to the latter. Balance the total length of the single-knife fight, to master multiple orders with the same material order splitting schedule, multi-material orders of different materials to fight the preparation of materials, the length of a single fight, the more orders the better fight.

4. Insertion orders for urgent orders: Customers will need goods in advance due to special circumstances. Due to quality accidents or insufficient quantities caused by printing slots, staples, product protection, etc., there will be compensation orders, delays in power outages, equipment failures, and lack of personnel. Ordinary orders are upgraded to urgent orders. In case of an urgent single insertion order, the marketing department should first communicate with the customer and confirm that the order can not be rescheduled to change the schedule unconditionally. When changing schedules, first communicate with the managers of the corrugated board line. We must satisfy both the needs of the customers and the width of the base paper. We must also consider not changing the width of the base paper frequently. Without changing the width of the base paper, if the total cost is low, it will not be replaced. For example, if the total length of the order does not exceed 1000m, the waste of trimming is no more than 10cm, do not change the base paper. This will not only save time, but also reduce the total cost of production. It can reduce the trouble of frequent paper change for single-sided machines and double-sided machines, thereby avoiding the contradiction between the scheduler and the operator, and completing the production of urgent orders as soon as possible.

5. Scheduled cancellation of orders: Due to special circumstances, the temporary cancellation of customer orders often encounters, once this happens, you must understand the reasons for canceling the order before cancellation and make a decision to prevent the phenomenon of just cancel and recover. Avoid invalid work. After the schedule has not been delivered to the corrugated board line production system, the cancellation of the order may be cancelled immediately; the operator who has been transferred to the production system shall be notified urgently by the tile line production system operator and the on-site manager to cancel immediately. In the case of orders that must be canceled for confirmation of the transfer to the corrugated cardboard line, do not hesitate to cancel the information. The more timely and faster the better the information is cancelled, so that unnecessary losses due to delay in information transmission can be avoided. 6. Changes in materials and data: Due to customer's mistakes or special needs, the temporary replacement of the base paper and the change of specifications and quantities are unavoidable. If the response is not timely, it will inevitably result in losses or even serious losses. This is of equal importance to the cancellation of orders. The timeliness of information transmission is closely related to the communication and implementation of relevant personnel in the production line. When you encounter similar situations, you can refer to the order cancellation method.

3. Conclusions The scheduling of corrugated board production lines is closely related to the production costs of enterprises. In a sense, the profit of a company depends on the technical level of the scheduler, especially the comprehensive quality of the high-speed corrugated cardboard production line to the scheduler. More demanding. Although most companies have realized the importance of schedulers, the degree of emphasis is still insufficient. For example, the comprehensive quality of their education, personal character, personality and professional proficiency is not strictly required. Even if they are valued, they are treated as such. Such as personal needs are not enough concern, always think that as long as anyone can operate the computer can be, when the scheduler left the company, the passive situation makes the manager regret. We need to list the scheduler as a technician, treat the scheduler as an important core job, integrate the care of the scheduler into the daily management, and combine the performance and treatment of the scheduler to make it possible. For the company to better serve.