Protective seal assembly for connector mating interface
A connector, such as a fiber optic connector, including a protective sealant layer bonded to a mating interface of the connector to protect against contaminants and damage to the mating interface prior to use. The sealant layer may comprise a liquid polymer applied to the mating interface using a seal mold to help prevent the polymer from wicking. The liquid polymer may dry at room temperature by solvent evaporation to form a protective barrier covering the mating interface to protect against physical and chemical damage. The protective seal layer also serves to clean the mating interface upon removal of the seal layer to provide for optimal performance of the connector.
1. A connector comprising:
a connector body;
a ferrule extending outwardly from the connector body, the ferrule including a mating interface on an end thereof for engaging a corresponding connector;
a seal mold including a longitudinal body portion and a cap portion extending from the longitudinal body portion, the longitudinal body portion including a first opening formed along a first end of the seal mold and the cap portion including a port opening formed along a second end of the seal mold, the seal mold further including a hollow interior cavity extending between the first end and the second end, wherein the ferrule extends through the first opening on the first end of the seal mold and the mating interface of the ferrule is positioned within the hollow interior cavity of the seal mold;
one or more vents formed along the longitudinal body portion of the seal mold; and
a sealant layer disposed within the hollow interior cavity of the body of the seal mold, the sealant layer contacting and overlaying the mating interface of the ferrule.
2. The connector of claim 1 , wherein the sealant layer comprises a curable polymer material, and wherein the one or more vents of the longitudinal body portion expose the sealant layer within the hollow interior cavity of the seal mold to an exterior of the seal mold to facilitate a curing process of the polymer material.
3. The connector of claim 2 , wherein the polymer material is curable at room temperature.
4. The connector of claim 1 , wherein at least a portion of the sealant layer is bonded to an interior surface of the longitudinal body portion of the seal mold, and wherein removal of the seal mold from the ferrule concurrently removes the sealant layer from the mating interface of the ferrule.
5. The connector of claim 4 , wherein a bond strength of the sealant layer and the mating interface is less than a corresponding bond strength of the sealant layer and the interior surface of the longitudinal body portion of the seal mold, such that upon removal of the seal mold from the ferrule, the mating interface is free of debris and residue from the sealant layer.
6. The connector of claim 1 , wherein the port opening is in communication with a chamber of the interior cavity of the longitudinal body portion formed between the mating interface of the ferrule and the second end of the seal mold.
7. The connector of claim 6 , wherein the sealant layer on the mating interface of the ferrule is disposed within the chamber, the sealant layer bonded to an interior surface of the longitudinal body portion of the seal mold.
8. The connector of claim 1 , wherein the connector is a fiber optic connector, and wherein the ferrule further includes a core passageway extending along a transverse axis thereof, the mating interface of the ferrule further including an opening in communication with the core passageway, and wherein the core passageway houses an optical fiber.
9. The connector of claim 1 , further comprising heat shrink tubing surrounding at least a portion of the longitudinal body portion of the seal mold and the ferrule, the heat shrink tubing bonded to the ferrule and an exterior surface of the seal mold.
10. The connector of claim 1 , further comprising an adhesive cover bonded to an exterior surface of the longitudinal body portion of the seal mold, the adhesive cover operable to urge removal of the seal mold from the ferrule in response to an application of force on the adhesive cover.
11. The connector of claim 8 , wherein the sealant layer further overlays the opening on the mating interface of the ferrule.
12. A method of assembling a connector, the connector including a ferrule extending outwardly from a connector body, the ferrule including a mating interface on an end thereof for engaging a corresponding connector, the method comprising:
polishing the mating interface of the ferrule of the connector;
inserting the ferrule through a first opening on a longitudinal body portion of a seal mold, the longitudinal body portion including a hollow interior cavity, wherein the mating interface of the ferrule is positioned within the hollow interior cavity and is offset from a port opening formed on a cap portion extending from the longitudinal body portion of the seal mold;
applying a liquid polymer onto the mating interface of the ferrule through the port opening of the cap portion of the seal mold, the liquid polymer coating the mating interface of the ferrule; and
curing the liquid polymer to form a protective sealant layer covering the mating interface of the ferrule within the seal mold.
13. The method of claim 12 , the longitudinal body portion of the seal mold further including one or more vents thereon, and wherein the liquid polymer is a solvent-suspended liquid polymer, the method further comprising evaporating the solvent in the solvent-suspended liquid polymer via the one or more vents on the longitudinal body portion of the seal mold to cure the liquid polymer.
14. The method of claim 13 , wherein the step of curing the liquid polymer occurs at room temperature.
15. The method of claim 12 , wherein the liquid polymer coats the mating interface such that no air gaps are present between the mating interface and the sealant layer.
16. The method of claim 12 , wherein the applying step further includes dipping the connector body and seal mold into a container of the liquid polymer to direct the liquid polymer onto the mating interface through the port opening on the cap portion of the seal mold.
17. The method of claim 12 , wherein the applying step further includes injecting liquid polymer onto the mating interface through the port opening of the cap portion of the seal mold.
18. The method of claim 12 , wherein the liquid polymer further coats an interior surface of the longitudinal body portion of the seal mold, and wherein removal of the seal mold from the ferrule concurrently removes the sealant layer from the mating interface of the ferrule.
19. The method of claim 12 , further comprising:
applying heat shrink material onto an exterior surface of at least a portion of the longitudinal body portion of the seal mold and the ferrule; and
bonding the heat shrink material to the seal mold and the ferrule.
20. The method of claim 12 , further comprising applying an adhesive cover to the longitudinal body portion of the seal mold, the adhesive cover operable to urge removal of the seal mold from the ferrule in response to an application of force on the adhesive cover.