第三章复习思考题

第三章复习思考题1.

油墨在凸版和平版印刷机上，要经过哪几个行程，才能完成一次印刷 ?各个行程的作用是什么?油墨在各行程中，应具备什么样的流变性能，才能使印刷正常进行 ?平版、凸版印刷机的墨层厚度是如何控制的?为什么在印刷过程中，墨斗中的油墨要保持一定的液面高度?3．试说明印刷机的输墨系统，利用增加墨辊数量，而不采用增加墨辊半径的方法，提高输墨的均一性的原因 ?4．胶辊的粘弹性效应对油墨的传输有什么影响 ?为什么冷却串墨辊的温度，可以提高输墨效果?5．举例说明，墨辊的排列方式对输墨的均匀性有何影响？从着墨辊的着墨率来看，你认为哪一种墨辊排列方式对油墨的传输有利 ?6．印刷中途为什么要尽量减少停印次数 ?使用过版纸有什么意义 ?7．根据你所学过的知识，简要说明为使印版获得厚薄均一的油墨膜层，输墨装置、墨辊、油墨应达到哪些基本要求 ?8．表 3-3列出了 J2108机的墨滚直径数据，若实际印刷面积为 880mm×615mm，墨滚长为880mm,试计算着墨系数、匀墨系数和贮墨系数。9．下图是东芝 B-B型胶印机的墨路图，试计算每根着墨辊的着墨率。印版滚筒10．何谓油墨转移率和油墨转移系数 ?如何测定印版墨量和转移墨量 ?2．试说明建立 W·F油墨转移方程所依据的数学模型的特点和方程建立的过程3．W·.F油墨转移方程的参有何物理意义 ?受哪些因素的影响 ?4．由油墨转移实验测得印版墨量x和转移墨量y的数据如表4-12所列。试给油墨转移方程参数b、f'、k赋值，并写出W·F油墨转移方程。表4-12实验测得的x、y数据（习题4用）x(um)0.2520.4100.6331.2052.1243.6844.9497.0868.83310.36912.006y(um)0.0300.3890.0800.1480.5891.7732.8113.9694.8645.2185.867x(um)13.75315.11618.96220.00526.047y(um)6.2886.6817.9218.1269.1085．已知印刷油墨的流变参数有如下数据:

fv

=0.46，

0=70

Pa

，

p =90

Pas，0=45Pa s，

0=0.1，印版墨量

x、转移墨量

y的数据如表

4-13

所列。试按公式

(4-19)求f'、按公式

(4-20)求b、按公式

(4-23)求k

(提示：求

b时用最小三组墨量求平均值；求

k时，用最大三组墨量求平均值 )。表4-13印版墨量x、转移墨量y数据(习题5用)x(g/m2)0.3100.5320.8100.9752.203.305.588.9011.26y(g/m2)0.1060.2640.4510.5571.241.762.764.155.176．试分析纸张的平滑度、印版的材质和图文形式、印刷压力与印刷速度如何影响油墨转移率。7．说明建立考虑纸面形状的油墨转移方程的思路和赋值方法。8．下面列出了两种纸张的油墨转移实验数据，利用一元线性回归分析的方法，编制计算机程序，计算b、f'、k值，并建立油墨转移方程。说明近似法赋值存在的问题。激光印字软片铜版纸新闻纸胶版纸x(g/m2)y(g/m2)x(g/m2)y(g/m2)x(g/m2)y(g/m2)x(g/m2)y(g/m2)0.1954890.014430.12030l0.014430.12696040.016430170.2315160.007468260.2706770.014430.1503760.028860.14936520.010455560.37789390.035847650.4511280.028860.1954890.043290.18371920.014936520.38834950.044809550.4812030.043290.2255640.043290.20463030.04331590.40477960.052277810.5112780.028860.3157890.07215010.22554140.04032860.557132l0.10156830.751880.043290.751880.173160.2270350.047796860.56011950.11053021.142860.086580.7969920.202020.38536220.058252420.56908140.13592231.203010.057720.9473680.230880.44809560.071695290.71097830.17923821.428570.115440.96240610.230880.46153840.0463032l0.73188940.1971621.578950.14431.082710.28860.50784160.09858100.94100060.23002241.63910.274171.187970.245310.5362210.14787151.0828980.33159071.819550.202021.413530.3463210.5660940.1329351.9029120.866318l.939850.50505l1.593980.461760.85138150.35997011.9238240.83345772.015040.490621.729320.50505l1.2442120.7677371.9342790.81553392.12030.54834l1.804510.5483411.4115010.73039572.3913371.1321882.36090.79365l1.939850.57720l1.4906640.69156082.7333831.2083642.345870.7503612.015040.7782111.6415230.81553392.7946231.2710982.514790.8946612.255640.8215011.6699030.86930543.0709481.3308442.556390.9235212.421050.8936511.8297230.94100063.5429421.60268812.646621.010l2.526320.9369412.0014930.95593723.6445ll1.7191932.872181.125542.631580.9658012.1254671.0380883.6803581.7714713.067671.255412.691730.9513712.3420461.2173263.8595961.8924573.293231.370852.646620.9513712.4421211.2218074.0224042.1568333.308271.399712.706770.9369412.4914111.1172524.24495812.3375653.368421.428572.977441.052382.6691561.3876034.5556382.5556383.443611.500723.067671.066812.7766991.2218074.5929792.6198653.744361.645023.187971.153393.1082891.5399555.2277813.0037343.87971.760463.293231.153393.3442861.7311435.7520533.501123.939851.746033.323311153393.3711721.7864086.4406273.828233.969921.803753.338351.182253.9596712.2285287.2322624.2867814.135341.919193.548871.239974.2688572.4630327.893954.5660944.330831.976913.669171225545.0933533.1665428.110534.8603434.36091.976913.774441.297696.3674384.110538.4854365.2008964.436Q92.063493.864661.39877.2949964.675139.8820015.9402534.571432.121214.270681.528578.4286785.27109710.488426.0791634.646622.16454.496241.644019.6280796.15533911.861096.8289764.691732.16454.736841.687310.525766.51381614.489927.8401784.932332.265514.872181.7161610.785666.