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Structural adhesives are unevenly mixed and white stripes appear locally. It is easier to observe when the light is brighter. When the mixing is not uniform and the mixing is uniform, the strength of the structural adhesive decreases after curing, the curing cross-linking is incomplete, and when the curing is serious, it will stick and can not be cured. So what is the reason for the uneven mixing of structural glue in the two-component glue beater? How can we avoid it?

混合不均勻的結構膠有以下四種情況及原因如下：

There are four kinds of uneven mixing structural adhesives and the reasons are as follows:

①連續花膠：一般是混合器堵塞、混合器裝配錯誤或者使用的混合單元不夠多;

(1) Continuous gum: generally, the mixer is blocked, the mixer assembly is wrong or the mixing unit is not enough;

②斷續有規律花膠：與系統性故障有關，如配比泵密封泄漏或者比例架磨損;

(2) Intermittent regular pattern gum: related to systemic faults, such as leakage of seal of proportioning pump or wear of proportioning frame;

③斷續無規律花膠：與故障有關，如過濾器堵塞/針閥堵塞/壓盤故障/配比泵入口堵塞或者密封失效/閥及高壓球閥失效等;

(3) Discontinuous irregular pattern gum: related to faults, such as filter blockage/needle valve blockage/platen failure/ratio pump entrance blockage or seal failure/safety valve and high pressure ball valve failure;

 

雙組份打膠機

④短暫停槍后又開槍時，開頭出現一段花膠：主要是膠粘度匹配不理想，需要調整系統管道或降低工作壓力。

(4) When the gun stops for a short time and fires again, a section of gum appears at the beginning: the main reason is that the gum viscosity matching is not ideal, and the system pipeline needs to be adjusted or the working pressure should be reduced.

要避免這種情況的出現，我們要對打膠機要定期進行保養，確保打膠機可以正常工作。每次開機前必須做蝴蝶試驗，確保結構膠混合均勻。蝴蝶試驗的方法如下：將打膠機打出的混合好的膠擠到紙中間5-10克，折合紙將膠壓平。打開紙檢查膠樣，混合均勻的膠應無異色條紋，如果膠出現異色條紋，則表明混膠不均勻，應查找原因，問題解決后才能使用。

To avoid this situation, we need regular maintenance of the glue machine to ensure that the glue machine can work properly. Butterfly test must be done before starting each machine to ensure that the structural glue mixes evenly. The butterfly test method is as follows: the mixed glue produced by the gluer is squeezed into the middle of the paper for 5-10 grams, and the folding paper is pressed flat. Open the paper and check the rubber sample. The glue with uniform mixing should have no heterochromatic stripes. If there are heterochromatic stripes in the glue, it shows that the mixing is not uniform. The reason should be found out and the problem can be solved before using it.

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