塑料模科学试模法.xls

1 810.91880223.861.11111116920 2 721.041730223.490.96153817992 3 631.171666222.820.85470119492.2 4 541.351570220.70.74074121195 5 451.581475218.350.63291123305 6 352.011332216.140.49751226773.2 7 242.91142213.130.34482833118 8 154.55975212.50.2197844362.5 9 10 11 12 Shear Rate 剪切率(1/ FT) Viscosity 粘度 (hpsixFTx10) In-Mold Rheology to Determine Fill Rate General information: 通用信息通用信息 Tool Temp ( C): 模温 Machine information: 设备信息设备信息 Melt temp ( C): 熔融温度 Sumitomo 350T 288mm 63mm *Press Manufacture/Tonnage: 注塑机 /吨位 205C 115 - 80C 214.42 Max injection pressure (psi): 最高注塑压力 Barrel size (stroke, mm): 炮筒尺寸（冲程） Barrel size (diameter, mm): 炮筒尺寸（直径） Max injection speed (mm/sec): 最高注塑速度 Pressure Transfer Plastic (ppsi) 切换压力 Screw length (mm): 螺杆长度 *Screw design: 螺杆设计 Injection Speed 注塑速度 Part Weight 零件重量 (g) Fill only part weight (g): 零件重量（刚填充满） 288mm common, L/D = 288/63 90mm/sec 150bar hydr. Fill Time 填充时间(F T) Break Point:2.01 16920 17992 19492.2 21195 23305 26773.2 33118 44362.5 0 5000 10000 15000 20000 25000 30000 35000 40000 45000 50000 00.20.40.60.811.2 Break Point: 拐点拐点 2.01 Procedure: 1.) Load the tool 上模 12.) Plot the viscosity vs. shear rate 绘制粘度V剪切率曲线 13.) Once a curve has been created, pick a location at which the curve begins to break (flatten) 找出曲线的拐点（趋于平缓部分） 14.) Mark this location in the cell titled break point 标注此位置为拐点 并填入break point表格 7.) Record the Fill Time, Peak Transfer Pressure and part weight in spreadsheet along with the corresponding injection speed 记录各个注塑速度对应下的填充时间、峰值切换压力、零件重量； 8.) On successive shots decrease the injection speed in nominal increments 按预定的步长逐步减小注塑速度 9.) Record the fill time, pressure at transfer and weight after every adjustment 记录每一步的填充时间、切换压力和重量 10.) Repeat this procedure until the injection speed is too slow to fill the part 重复上述步骤，直到注塑速度慢到无法充满产品 11.) Calculate viscosity and shear rate (calculations are in the spreadsheet) 计算粘度和剪切率（计算方式见左表） 2.) Establish a process the yields a complete part and run tool until it reaches equilibrium temperature 热机直到温度稳定 3.) Verify melt temperature but measuring the temperature of an air shot in cycle 通过空射确认熔融温度 4.) Begin by setting pack and hold times to 0 and the injection speed to the machine maximum 设定保压压力和保压时间为0；注塑速度设为机台最高速； 5.) Next establish the transfer point (1st stage cut-off) that yields a 95%-98% full part(s) 设置转换点为产品饱和度9598% （一段射较） 6.) Set 1st stage and total injection timer to 10sec 设置总注射时间计时器为10s； 15.) This value should be used as the optimum injection velocity 这个值将作为最优的注塑速度 1.2 系列1 取点举例：取点举例： 13.) Once a curve has been created, pick a location at which the curve begins to break (flatten) 找出曲线的拐点（趋于平缓部分） 7.) Record the Fill Time, Peak Transfer Pressure and part weight in spreadsheet along with the corresponding injection speed 记录各个注塑速度对应下的填充时间、峰值切换压力、零件重量； 2.) Establish a process the yields a complete part and run tool until it reaches equilibrium temperature 热机直到温度稳定 4.) Begin by setting pack and hold times to 0 and the injection speed to the machine maximum 设定保压压力和保压时间为0；注塑速度设为机台最高速； 5.) Next establish the transfer point (1st stage cut-off) that yields a 95%-98% full part(s) 设置转换点为产品饱和度9598% （一段射较） Cavity 1Cavity 2Cavity 3Cavity 4Runner Shot #114833bar116.2116.27232.47 Shot #214833bar116.11116.24232.35 Shot #314833bar116.05116.21232.26 Shot #116833bar116.87116.91233.78 Shot #216833bar116.93116.98233.91 Shot #316833bar116.92116.95233.87 Shot #118833bar117.68117.68235.36 Shot #218833bar117.65117.69235.34 Shot #318833bar117.65117.7235.35 Shot #120833bar118.18118.28236.46 Shot #220833bar118.18118.21236.39 Shot #320833bar118.27118.41236.68 Shot #122833bar118.43118.51236.94 Shot #222833bar118.41118.44236.85 Shot #322833bar118.53118.52237.05 Shot #124833bar118.56118.58237.14 Shot #224833bar118.62118.57237.19 Shot #324833bar118.55118.56237.11 Cavity 1Cavity 2Cavity 3Cavity 4Runner Shot #122714bar118.83118.87237.7 Shot #222714bar118.81118.86237.67 Shot #322714bar118.77118.83237.6 Shot #122761bar119.12119.11238.23 Shot #222761bar119.15119.14238.29 Shot #322761bar119.17119.09238.26 Shot #122809bar119.21119.26238.47 Shot #222809bar119.27119.27238.54 Shot #322809bar119.27119.29238.56 Shot #122856bar119.42119.52238.94 Shot #222856bar119.45119.54238.99 Shot #322856bar119.43119.51238.94 Gate Freeze Study 浇口封闭时间研究浇口封闭时间研究 Packing Weight Study 保压压力研究保压压力研究 Part Weight 产品重量 Pack/Hold Time 保压时间 Packing Pressure 保压压力 Total w/o Runner Pack/Hold Time 保压时间 Packing Pressure 保压压力 Part Weight 产品重量 Total w/o Runner example: 8 sec99.28-10= .90% 10 sec100.110-12=.10% 12 sec100.2 10-12.25% so use 10 sec example: 650 psi99.2 8-10= .90% 750 psi100.1 10-12=.10% 850 psi100.2 750-850.25% so use 750 psi Continue increasing time until weight gain is less then 0.25%. 逐步增加保压时间直到重量增加小于0.25% Use time from gate freeze study (10-12.25% so use 10 sec) 保压时间采用浇口封闭时间研究得出的时间 Continue increasing pressure by 100-150psi incremants (depending on part size) until weight gain is less then 0.25%. 逐步增加保压压力100150 psi（取决于产品大小）直到产品重量增加小于0.25% 237.1467 0.26847 Avg. w/o runner 100 For POM use packing pressure equal to 50% of max inj pressure (i.e. 1300*0.5= 650 psi) 对于POM，保压压力一般先取峰值注塑压力的50%； % Weight Gain 235.35 236.51 236.9467 232.36100 0.638577 233.8533 0.635