The reasons for the failure of the Fiber Optic Splice Closure test are roughly divided into the following categories: First, the structural design, the bonding between the tape and the PE sheath is not tight; second, the process parameters in the injection molding process are not well mastered, resulting in a partial permanent size difference, and The sealing rubber at the joint is easy to form excessive extrusion or collapse at this time. In severe cases, cracking and brittle fracture of the product may occur. Third, the quality of the sealant is not good. Fourth, the PE sheath is not ground into a pockmark during installation. Also, no sealant was applied, and the head of the self-adhesive tape was not stretched tightly, and some tapes were insufficiently wound, and the outer diameter was fine without being pressed.

In addition to the above problems, we found some problems in the fiber optic splice closure. First, the internal space is small and cannot meet the requirements of the standard. The remaining fiber length is not less than 1.6m, and the radius of curvature of the remaining fiber disk is not to be less than 30mm" requirements, if the fiber is placed on the disc, the split lid is not on; the second is the lack of accessories to be configured, such as the amount of sealant is too small, can not complete the seal as required; lack of fiber splice protection tube, horizontal fiber optic splice closure seals the retaining ring.

In actual use, the fiber optic splice closure still has the following problems, which seriously affects the network quality and user experience. The specific problems are as follows:

1. The fiber optic splice closure is deformed and broken. In practical applications, some of the fiber optic splice closures have cracked the box, or the box is deformed and aged after being used for a period of time.

2. The accuracy of the fiber optic splice closure is not enough. In the actual application, after the cable is connected, it is necessary to seal the box and find that the bolt cannot be tightened, resulting in the sealing property not meeting the requirements.

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