密封胶没有足够的固化时间，飞机可以执行航班吗

sunwc · 发表于 2019-10-21 14:45:02

飞机换1号窗，天线都需要封胶，密封胶需要的固化时间一般都比较长，如果飞机没有足够的停场时间来固化，大家一般都是怎么处理的呢？贴纸胶带的话合不合规范啊，哪位大师能帮找找手册里怎么说？

17732137307 · 发表于 2019-10-21 17:44:06

这个跟温度有关，一般至少需要8个小时以上，一般都会拿热风枪吹，等表面固化，也就是不粘手之后，再贴金属胶带，但是我们对于天线一般是不会贴金属胶带的，

梦想修飞船 · 发表于 2019-10-21 17:51:40

一般就上绝招，加温加速固化

木棉花儿 · 发表于 2019-10-21 18:24:52

航线一般时间不够的情况下，使用加热减少固化时间，以下是加热后的固化时间计算方法，航线中一般在时间不够的情况下粘贴SPEED tape是金属胶带，纸胶带貌似不能够使用，并且使用金属胶带一般在AMM手册中有，没有说所有地方都可以
Sealant Handling Properties
NOTE: (1) The general rules in this note are provided as a starting point for determining
the effect of temperature and humidity on sealant properties. The actual
effect may be different than that specified by the general rules and should
be verified through experience or testing.
(2) Increasing temperature and/or humidity shortens sealant tack- free and cure
times. Decreasing temperature and/or humidity lengthens sealant tack-free
and cure times. Starting at Standard Test Conditions (approximately 77 F
and 50 percent relative humidity), changes in temperature and humidity
affect sealant properties as follows:
(a) Every 20 F (11 C) rise in temperature reduces sealant tack-free and cure
times by about half.
(b) Every 15 percent rise in relative humidity reduces sealant tack-free and
cure times by about 1/3 up to 1/2. Humidity affects polysulfide sealants
more than polythioether sealants.
a. Sealant squeeze-out life is affected by temperature as follows:
(1) At 81 to 95 F (27 to 35 C), the squeeze-out life of sealant is about 1/2 of its value
at Standard Test Conditions.
(2) At 95 to 115 F (35 to 46 C), the squeeze-out life of sealant is about 1/4 of its value
at Standard Test Conditions.

555566 · 发表于 2019-10-22 11:55:39

用热风枪吹，贴金属胶带

来自安卓APP客户端

skyhawk2010 · 发表于 2019-10-22 12:57:22

用热风枪吹

sunwc · 发表于 2019-10-22 21:35:55

结构学员发表于 2019-10-21 18:24
航线一般时间不够的情况下，使用加热减少固化时间，以下是加热后的固化时间计算方法，航线中一般在时间不够 ...

换1号窗的AMM手册里有，说固化时间不够可以贴铝箔胶带
a) If you must send the airplane before the sealant is fully cured, install Scotch
425 Aluminum Foil Tape, G00291 on the top of the sealant.
NOTE: Remove the Scotch 425 Aluminum Foil Tape, G00291 when the
sealant is fully cured.
但是在换天线的封胶里，肯定是不可以贴金属胶带或铝箔胶带的，手册有没有依据贴纸胶带呢？还是只能用热风枪加速固化？

海阔天空555 · 发表于 2020-5-1 12:50:23

学习学习

来自安卓APP客户端

zhm7818 · 发表于 2021-5-3 20:25:16

木棉花儿发表于 2019-10-21 18:24
航线一般时间不够的情况下，使用加热减少固化时间，以下是加热后的固化时间计算方法，航线中一般在时间不够的情况下粘贴SPEED tape是金属胶带，纸胶带貌似不能够使用，并且使用金属胶带一般在AMM手册中有，没有说所有地方都可以
Sealant Handling Properties
NOTE: (1) The general rules in this note are provided as a starting point for determining
the effect of temperature and humidity on sealant properties. The actual
effect may be different than that specified by the general rules and should
be verified through experience or testing.
(2) Increasing temperature and/or humidity shortens sealant tack- free and cure
times. Decreasing temperature and/or humidity lengthens sealant tack-free
and cure times. Starting at Standard Test Conditions (approximately 77 F
and 50 percent relative humidity), changes in temperature and humidity
affect sealant properties as follows:
(a) Every 20 F (11 C) rise in temperature reduces sealant tack-free and cure
times by about half.
(b) Every 15 percent rise in relative humidity reduces sealant tack-free and
cure times by about 1/3 up to 1/2. Humidity affects polysulfide sealants
more than polythioether sealants.
a. Sealant squeeze-out life is affected by temperature as follows:
(1) At 81 to 95 F (27 to 35 C), the squeeze-out life of sealant is about 1/2 of its value
at Standard Test Conditions.
(2) At 95 to 115 F (35 to 46 C), the squeeze-out life of sealant is about 1/4 of its value
at Standard Test Conditions.

哥们，你这个是在AMM那里找到的

来自安卓APP客户端

帐号		自动登录	找回密码
密码			立即注册

[1-19通用] 密封胶没有足够的固化时间，飞机可以执行航班吗

实名认证

西安航空职业技术学院

GAMECO