Soluble manufacturing aid

{
  "publication_number": "US10099403B2",
  "country": "US",
  "kind": "B2",
  "title": "Soluble manufacturing aid",
  "abstract": "Provided is a method of forming a shaped structure. The method includes coupling a first section of a mold to a second section of the mold such that a mold cavity is defined, wherein a cross-sectional shape of the mold cavity corresponds to a cross-sectional shape of the shaped structure and wherein at least one of the first section of the mold and the second section of the mold comprise a soluble material; at least partially filling the mold cavity with a curable polymer; and curing the curable polymer in the mold cavity to make the shaped structure.",
  "claims": [
    "1. A method of forming a shaped structure, comprising: coupling a first section of a mold to a second section of the mold such that a mold cavity is defined, wherein a cross-sectional shape of the mold cavity corresponds to a cross-sectional shape of the shaped structure, and wherein the first section of the mold and the second section of the mold comprise a soluble material; at least partially filling the mold cavity with an uncured curable polymer; curing the uncured curable polymer in the mold cavity to make the shaped structures; removing the first section and the second section of the mold to expose the shaped structure, wherein removing of the first section and second section of the mold comprises dissolving the soluble material with a solvent; and attaching the shaped structure to a substrate comprising a discontinuity, wherein the shaped structure functions as a seal at the discontinuity.",
    "2. The method of claim 1, wherein the solvent comprises water.",
    "3. The method of claim 1, wherein the solvent comprises an organic solvent.",
    "4. The method of claim 1, wherein the soluble material comprises a starch.",
    "5. The method of claim 1, wherein the soluble material comprises a foam.",
    "6. The method of claim 1, wherein the soluble material comprises a starch component selected from unmodified and modified corn, potato, wheat, rice, tapioca, waxy maize, high amylase corn starch, or combinations thereof.",
    "7. The method of claim 1, wherein the substrate comprises wherein the substrate comprises a first structural member having an outer surface, a second structural member having an outer surface and an edge surface, and the discontinuity is defined between the first structural member and the second structural member.",
    "8. The method of claim 1, wherein at least one of the first continuous section of the mold and the second continuous section of the mold comprises a plurality of access conduits, and wherein the at least partially filling of the mold cavity with the curable polymer comprises introducing the curable polymer into the cavity through at least one of the plurality of access conduits.",
    "9. The method of claim 8, wherein the method further comprises plugging closed at least one of the plurality of access conduits to prevent the uncured curable polymer from flowing out of the cavity.",
    "10. A method of forming a shaped structure, comprising: coupling a mold comprising a body portion and a cavity surface to a substrate such that a mold cavity is defined between the cavity surface and the substrate, wherein the substrate comprises a first structural member having an outer surface, a second structural member having an outer surface and an edge surface, and a discontinuity between the first structural member and the second structural member, wherein a cross-sectional shape of the cavity corresponds to a cross-sectional shape of the shaped structure, and wherein the body portion comprises a soluble material; depositing a curable polymer into the cavity through at least one opening in the mold and onto the discontinuity; curing the curable polymer to form a cured polymer, wherein at least a portion of the curable polymer contacts the outer surface of the first structural member and the outer surface of the second structural member; and removing at least some of the body portion of the mold to expose the cured polymer, wherein the removing of at least some of the body portion of the mold comprises dissolving the soluble material with a solvent.",
    "11. The method of claim 10, wherein the solvent comprises water.",
    "12. The method of claim 10, wherein the solvent comprises an organic solvent.",
    "13. The method of claim 10, wherein the soluble material comprises a starch.",
    "14. The method of claim 10, wherein the soluble material comprises a foam.",
    "15. The method of claim 10, wherein the soluble material comprises unmodified and modified corn, potato, wheat, rice, tapioca, waxy maize, high amylase corn starch, or combinations thereof.",
    "16. The method of claim 10, wherein the at least a portion of the cured polymer further contacts the edge surface of the second structural member.",
    "17. The method of claim 10, wherein the at least one opening comprises a plurality of access conduits extending through the body portion.",
    "18. A method of forming a shaped structure, comprising: coupling a mold comprising a body portion and a cavity surface to a substrate such that a mold cavity is defined between the cavity surface and the substrate, wherein a cross-sectional shape of the cavity corresponds to a cross-sectional shape of the shaped structure, wherein the body portion comprising a soluble material, wherein the soluble material comprises unmodified and modified wheat, tapioca, waxy maize, high amylase corn starch, or combinations thereof; depositing an uncured curable polymer into the cavity through an opening in the mold; and curing the uncured curable polymer to form the shaped structure, exposing the shaped structure by dissolving a portion of the mold with a solvent and removing a portion of the mold by mechanical force."
  ],
  "description_excerpt": "The subject matter described herein relates generally to the forming of articles and, more particularly, a method for forming elastomeric materials into desired shapes with the use of a soluble manufacturing aid.\n\nIn aircraft construction, the use of polymers with strong adhesion to substrates may be required for various reasons, including for forming and/or protecting components of the aircraft, such as the fuselage, wings, and others. Many structures, such as aircraft structures, include a plurality of assemblies that may create gaps, edges, ledges, and other discontinuities where elements of the assemblies interface. Efficient and safe operation of an aircraft, for example, requires that such discontinuities be sealed. Thus, polymers may be used for sealing surface discontinuities, such as encapsulating gaps, edges, ledges and other discontinuities on aircraft structures. When dispensing polymers onto a surface of a substrate, e.g., an aircraft part or aircraft assembly, it is often important to control one or more properties of the polymer, such as its profile or shape. Conventional manufacturing processes that require forming of polymers into complex geometries, are subject to a time-intensive process that include hand-working a high viscosity pre-polymer with the aid of volatile solvents. To increase viscosity, an existing solution is to use fillers within the uncured pre-polymer, which allows for applying the material manually onto the substrate.",
  "cpc": [
    "B29C 33/52",
    "B29C 2035/0827",
    "B29C 33/38",
    "B29C 33/40",
    "B29C 35/0805",
    "B29C 39/006",
    "B29C 39/02",
    "B29C 39/34",
    "B29K 2803/00",
    "B29K 2805/00",
    "B29K 2995/0062",
    "B29L 2031/26",
    "B29L 2031/3076",
    "B64F 5/10",
    "F16B 11/006"
  ],
  "ipc": [
    "B29C 33/38",
    "B29C 33/52",
    "B29C 35/08",
    "B29C 39/02",
    "B29L 31/30"
  ],
  "assignees": [
    "BOEING CO"
  ],
  "inventors": [
    "ZAVADA ANDREW M",
    "BOOTH BRANDON D",
    "CARDONA ISBELIA D"
  ],
  "filing_date": "2016-02-01",
  "publication_date": "2018-10-16",
  "grant_date": "2018-10-16",
  "priority_date": "2016-02-01",
  "application_number": "US-201615012099-A",
  "family_id": "59386343",
  "citations": [
    "US2009025300A1",
    "US2015035200A1",
    "US2015239193A1",
    "US4212839A",
    "US5730824A",
    "US5964979A",
    "US6375880B1",
    "US8029636B2"
  ]
}