瓦线机器设备的心脏是单面机，单面机的心脏当然是瓦楞辊。虽然很多因素都极大的影响瓦楞纸板的质量。如：原纸，淀粉浆、机器设备、操作人员等。然而，瓦楞辊的质量，尤其是楞型质量，从最开始便决定了瓦楞纸板的强度和质量。更重要的是，瓦楞辊影响生产同样厚度和强度纸板所需要使用瓦楞芯纸的用量。也就是说，瓦楞辊决定你的产品质量竞争力和生产成本竞争力。
The heart of the corrugator machines is the single facer and the heart of single facer is of course the CORRUGATING ROLLS. the quality of the produced Board is greatly influenced by many factors. such as: paper, starch, equipment machines, peoples etc. However, the quality of the rolls, especially the profile, determine from the beginning what the strength and quality of board is going to be. More important, it determine the usage of medium paper to produce the same thickness and the same strength of board. That is to say, CORRUGATING ROLLS determine your product competitiveness and your production cost competitiveness.
购买瓦楞辊要考虑的因素很多，本文以碳化钨瓦楞辊VS镀铬瓦楞辊销售之“可以节省瓦楞芯纸（而不降低纸板强度）之投资回报为引子，仅对购买瓦楞辊应考虑之楞型体优化之因素加以简要说明。
we should consider many factor when we purchase corrugating roll. in this article, we take the medium paper ROI (Return On Investment) of TCC (Tunsgten Carbide Coating) corrugating roll Verus chrome coating roll as primer. Just focus on profile optimization as one important consideration when purchasing corrugating roll.
做为瓦楞辊的用户， 在头脑中必须有用纸率的概念，因为它关系到数目极大的金钱，如果您对它还一无所知或漠不关心，您的损失将十分惨重. 反过来，您将比同行获得惊人的额外利润。
To be a corrugating roll user, should have the TUF (Take Up Factor) concept in mind. because it related to great deal of money. if you do not know anything about it or indifference to it. your loss would be very heavy, on the other hand, you will have amazing extra profits than your peers.
用纸率：可分为理论用纸率和实际用纸率
TUF can be divided into actual TUF and theoretical TUF
实际用纸率：是生产单位长度纸板所用瓦楞芯纸长度与里纸长度的比值。
Actual TUF: is the ratio of medium paper usage in length to the liner paper usage in length in unit length of single face web.
其较准确的测量方法为：停机时，在未进入单面机的瓦楞芯纸边缘画两个记号，并记录两个记号间瓦楞芯纸的长度L1,然后开机，在天桥上找出这两个记号合成的单面见坑纸板,并再次测量出两个记号之间的长度L2，Ll与L2的比值就是您的实际用纸率。
The more accurate measurement method is to stop the machine, draw two marks at the edge of medium paper, which not into the single facer, measure and record the length between two marks as L1. Run machine and go to the bridge to find the single facer web with two marks, flatten it, and measure and record the length between two marks as L2. the ratio of L1 to L2 is your actual TUF.
实际用纸率的决定因素为理论用纸率,并受原纸湿度，刹车张力大小，预热温度高低，施加蒸汽喷淋与否，及测量误差的影响.
Actual TUF is maily determined by theoretical TUF and influenced sightly by paper humidity, high or low brake tension, high or low prehearting, application of steam or not, and measuring tolerance.
理论用纸率为我们通常所讲的用纸率，其考虑瓦楞芯纸厚度，面纸厚度，及压力辊直径对用纸率的影响因素，但不考虑原纸伸缩的因素，其三个主要影响因素为瓦楞辊的楞高，楞距和楞顶圆的大小。
theoretical TUF is the TUF we usually talk about. it consider the caliper of medium paper and caliper of liner paper and pressure roll diameter, but without consider the paer stretch or shrinkage. the three main influence factor is flute height, flute pitch and tip radius of corrugating roll.
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楞型磨损的主要部分总是在楞顶，因为芯纸成型时，永远是以１３０％～１５０％的更快速度滑过楞型顶部：
The main flute wear is awlays on the flute tips. because the medium paper always slide on the flute tips at running speed P1, which is 130%~150% faster than the production speed P2=P3.
Ｐ１>Ｐ２=Ｐ３．
楞顶的快速磨损会不断降低纸板的厚度与强度。
Wear on the flute tips will continually reduce teh corrugated board thickness and strength.
所以当我们订购瓦楞辊的楞高时必须考虑两个因素：获得可接受纸板厚度的最低楞高Ho 和 所订购瓦楞辊楞高的磨损量T。
订购瓦楞辊的起始楞高H=Ho+T
碳化钨瓦楞辊楞高磨损量几乎为零，所以可以订购较低的起始楞高.
而订购镀铬瓦楞辊时,我们不得不考虑较大的磨损量，从而不得不订购较高的起始楞高H。
So, we must consider two factors when we order the starting flute heigth of corrugating roll H: the height to obtain the minimum acceptable board thickness Ho, and the loss height due to wear T.
The starting flute height H = Ho + T
The loss flute height of TCC (Tungsten Carbide Coating) corrugating rolls is almost zero. so we can order at a low starting height.
Yet, we have to order higher starting flute height when we order chrome coating roll due to higher wear loss height.
由用纸率与楞高的关系可以得知，当订购镀铬瓦楞辊时：实际上我们不得不将额外的芯纸白白送给我们的客户。而它原本属于我们的利润。下面
By the relationship between flute height and TUF, we know, when we order chrome coating corrugating roll, in fact, we have to send additional medium paper in vain to our customers. and it originally should belongs to our profits.
Now, let's click the link below and calculate:
how many additional medium paper we send to our customers in vain? Yet,it should originally belong to our profits!
着重说明：您查看的计算结果，每年RMB880,000的投资回报，只是一对1800镀铬瓦楞辊更换成碳化钨瓦楞辊的最初级投资回报，众多精彩内容还没有开始....... 但对于是购买碳化钨瓦楞辊还是购买镀铬瓦楞辊的决策者来说，只要能明白每年RMB 880,000的投资回报只有购买碳化钨瓦楞辊（是投资）才能带给您，而够买镀铬瓦楞辊（是花费）却不行，就己经足够了。
Emphasize: The annual ROI (Return On Investment) RMB 880 is just the primary invetment return for one set of 1800 working width corrugating roll, if we order TCC corrugating roll instead of chrome coating roll. so many wonderful content has not yet started...But for the decision-maker, which deicide to order TCC rolls or Chrome rolls. as long as he can understand that only TCC roll can bring him annual ROI RMB 880000, while chrome roll can not. that is already enough.
本文中投资回报计算程式为站长2005年4月份从保定金利回来后之原创版本，个人认为是较实用的销售辅助工具之一。投资回报是技术型销售的最核心，供需双方对投资回报方案达成共识是决定销售成败的关键。对此投资回报计算程式的理解，现引用《神鵰侠偘》中一段话：
杨过道：“老前辈这武功既然不传外人，晚辈以不学为是。我义父神智未复，老前辈不用跟他一般见识。”
洪七公摇头道：“你虽学了架式，不知运劲诀窍，临敌之际全然无用。我又不是要你去打你义父，只消摆几个姿式，他一看就明白了。因此也不能说是传你功夫。"
In this article, the ROI calculation program is originally version which created by David Qi in April 2005. personal point of view, it is one of the more practical sales auxiliary tools. Agreement on ROI between the supplier and the customer, is the key to decide the sales success or not.
只有充分考虑影响楞型设计的全部因素，并对楞型所有参数进行优化，才能获得最佳的纸板强度和瓦楞芯纸之节省。仅仅通过改变楞高、楞距、楞顶圆，而没有考虑其它影响楞形设计的诸多因素，可以起到节省瓦楞芯纸用量或增强纸板强度的目的，但不会是全面的提高。
Only by completely considering all necessary information and all other aspect, and only by truly optimizing the profile in all the parameters can help you achieve optimized board strength and paper saving. Just by changing the fltue height or the pitch or the tip radius without considering other aspect can offer some paper saving or strength, but not overall improvement.
我们提供专业的楞型设计来满足您的需求，为了帮助您获得改进和提高，请让我们和您一起审视你正在使用的楞型，让我们和您一起收集楞型设计所需要的全部信息。我们将非常高兴能为您量身推荐或设计一款更适合您的单面机、更适合您所使用的瓦楞芯纸，更能满足您的实际或特殊需求、及各种工况的楞型。我们将提供给您节省瓦楞芯纸、提高纸板强度、和机器运行性能的可行性方案。我们的楞形设计将提供给您更强的纸板强度，更长的辊子使用寿命，更顺畅的运行性能，更稳定的纸板质量，更重要的是将提供给您可观的瓦楞芯纸节省。让您瓦楞辊的购买行为变成投资而不再是花费。
we are the professional in creating a specific profile to suit your needs. In order to help you achieve improvement, please allow us to work with you to have a look at your current used profile, please allow us to work with you to collect all the necessary information to be able to design a profile to suit your machine, papers used, your actual or special needs, and conditions. we would like to offer you the possibility to save money in your paper usage and also improve the quality of your board and machine run-ability. With our design, we will provide you a better strength board, longer lifespan, more smooth run-ability, and more continuant quality. More importantly, will offer you a very good saving of medium paper. Let buying rolls as an investment rather than expense.
我们将非常高兴的感谢您提供我们和贵公司合作的机会，我们将非常高兴能帮助您发掘您瓦楞辊可能的改进空间。获得更多信息，请联系我们。
we would be more than happy to thank you for you gaving us the chance to work with your company. We would be more than happy to help you discover all the available possibilities. Please contact me for further information and
