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标题: 气辅，分析结果关于注气在速度压力转换之前的问题 [打印本页]

作者: olympic 时间: 2007-5-8 15:51
标题: 气辅，分析结果关于注气在速度压力转换之前的问题
我设置速度压力控制转换于5毫米的地方，设置气体延迟为1秒，其它的就不细说了。

看分析输出似乎正常，但总是有一行提示：

** NOTE ** Try to inject gas before velocity/pressure switch-over

这是为什么呢，速度压力控制转换不是早就已经完成了吗？

下面是我的分析结果输出：

--------------------------------------------------------------------------

Filling Analysis

Packing Analysis

Residual Stress Analysis

Gas-assisted Injection Molding Analysis
analysis is beginning ....

  Filling phase:                            Status: V  = Velocity control
                                                   P  = Pressure control
                                                   V/P= Velocity/pressure switch-over
                                                   G  = Gas injection
|----------------------------------------------------------------------------------------|
|  Time  | Volume|  Pressure |  Clamp  |Flow rate|  Ram | Gas Injection |Status |
|       |    |          |  force  |       |position |Inlet#|  Pressure  |    |
|  (s) |  (%)  | (MPa) | (tonne) |(cm^3/s) |  (mm) |    | (MPa) |    |
|----------------------------------------------------------------------------------------|
| 0.69 | 96.66 |    20.35 |    6.20 | 34.33 | 5.00 |V/P by ram pos.|
| 0.70 | 97.53 |    16.28 |    5.12|    |          |       | P |
| 0.73 | 98.77 |    16.28 |    5.14|    |          |       | P |
| 0.76 | 99.96 |    16.28 |    5.46|    |          |       | P |
| 0.76 |100.00 |    16.28 |    5.47|       |    |          |       | Filled|
|---------------------------------------------------------------------------------------|

  Execution time in Filling Phase =    172.99 s

  Packing phase:
|------------------------------------------------------------------------------|
|  Time  |Packing|  Pressure |  Clamp  | Gas Injection |    Status    |
|       |    |          |  force  |Inlet#|  Pressure  |                |
|  (s) |  (%)  | (MPa) | (tonne) |    | (MPa) |                |
|------------------------------------------------------------------------------|
|                                                                            |
| ** NOTE ** Try to inject gas before velocity/pressure switch-over          |
| End of polymer injection/packing, polymer injection location is now closed.  |
| 1.69 |    |          |       | 1  |          | Gas started |
| 1.69 |  3.13 |          |    5.15| 1  |       4.00|       G       |
|                                                                            |
| WARNING: Possible backflow at gas entrance no. 1                         |
| 3.01 |  7.51 |          |    1.18| 1  |       4.00|       G       |
| 4.51 | 12.52 |          |    0.95| 1  |       4.00|       G       |
| 6.01 | 17.53 |          |    0.85| 1  |       4.00|       G       |
| 7.51 | 22.54 |          |    0.76| 1  |       4.00|       G       |
| 9.01 | 27.55 |          |    0.64| 1  |       4.00|       G       |
|  10.51 | 32.56 |          |    0.53| 1  |       4.00|       G       |
|  10.71 | 33.23 |          |    0.51| 1  |       4.00|       G       |
|  10.71 |    |          |       |    |          |Pressure released|
|------------------------------------------------------------------------------|
|  11.69 |    |          |       | 1  |          | Gas stopped |
|  11.99 | 37.54 |       0.00 |    0.28|    |          |       P       |
|  13.49 | 42.55 |       0.00 |    0.00|    |          |       P       |
|  14.99 | 47.56 |       0.00 |    0.00|    |          |       P       |
|  16.49 | 52.57 |       0.00 |    0.00|    |          |       P       |
|  17.99 | 57.58 |       0.00 |    0.00|    |          |       P       |
|  19.49 | 62.59 |       0.00 |    0.00|    |          |       P       |
|  20.99 | 67.60 |       0.00 |    0.00|    |          |       P       |
|  22.49 | 72.61 |       0.00 |    0.00|    |          |       P       |
|  23.99 | 77.62 |       0.00 |    0.00|    |          |       P       |
|  25.49 | 82.63 |       0.00 |    0.00|    |          |       P       |
|  26.99 | 87.64 |       0.00 |    0.00|    |          |       P       |
|  28.49 | 92.65 |       0.00 |    0.00|    |          |       P       |
|  29.99 | 97.67 |       0.00 |    0.00|    |          |       P       |
|  30.69 |100.00 |       0.00 |    0.00|    |          |       P       |

作者: szyeeh 时间: 2007-5-8 16:40
设置气体在0.5秒进气试试。
0.69 | 96.66 | 20.35 | 6.20 | 34.33 | 5.00 |V/P by ram pos.|

你的CASE 在0.69S 已经转换了。

作者: olympic 时间: 2007-5-9 10:04
对呀，V/P转换是在0.69秒，然后气体开始在1.69秒，
气体注射不是已经在V/P转换之后了吗？

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