DI-MISC-80703
Laminating Process Description (Boats)
Specifies the format and content for describing the laminating process used to fabricate fiber reinforced plastic boat hulls in accordance with contract drawings and specifications.
Approval DateNovember 15, 1988
AMSC NumberN4568
Preparing Activity—
Project Number—
OPRN/PMS300
DTIC Applicable—
GIDEP Applicable—
Limitation—
Applicable Forms—
Approval Limitation—
Form VersionJUN 86
DID Formatdd_form_1664
963C CompliantNo
DISTRIBUTION STATEMENT A: Approved for public release; distribution is unlimited.
Supersedes
UDI-E-23086
Related
—Description & Purpose
The Laminating Process Description delineates the procedure used in fabricating fiber reinforced plastic boats in accordance with the drawings and specifications applicable to the contract. This is to insure that the contractor's process meets the specification requirements.
Application & Interrelationship
7.1 This data item description (DID) contains format and content preparation instructions for the data product generated by the specific and discrete task requirements as delineated in the contract.
7.2 This DID applicable to the construction of fiber reinforced plastic hulls.
7.3 This supersedes UDI-E-23086.
Use & Relationship
—
Preparation Instructions
10.1Laminating Process Procedure Description
10.2GeneralFor each of the items below, describe the quality control and inspection procedures by which compliance with the requirements of the specification will be assured, or refer to the appropriate section of the contractor's quality assurance or inspection document. Include job titles, inspection intervals, and record keeping procedures. Where information concerning methods is required, include tools, equipment, procedures, and quality controls used.
10.2.1For each of the materials used in lamination and assembly, identify:
10.2.1.1Manufacturer
10.2.1.2Specification (by part or model number, or by Federal, Military, or commercial specification)
10.2.1.3Method of storage (protection from heat and weather, temperature and humidity control)
10.2.2Laminating Process
10.2.2.1Temperature and humidity control and monitoring in the laminating facilityDescribe the methods of temperature and humidity control and monitoring in the laminating facility.
10.2.2.2Preparation of the molds for laminationIdentify the methods of preparation of the molds for lamination. Include repair polishing methods, type, and method of application of mold release agents.
10.2.2.3Chronology of the hull laminating processProvide a chronology of the hull laminating process from the application of the gel coat to the beginning of the application of the hull internal structure. Include the time elapsed from the application of the gel coat, and the time and number of persons required to complete each operation. Include time and duration of breaks in the process, and identify use of scaffolding and rolling of the mold.
10.2.2.4Method of application of the gel coatIdentify the method of application of the gel coat, the gel time used, and the method by which thickness is monitored and controlled.
10.2.2.5Promoter, accelerator, catalyst, thixotrope and other gel coat and laminating resin additivesIdentify when and by what methods the promoter, accelerator, catalyst, thixotrope and other gel coat and laminating resin additives, as applicable, will be measured and mixed into the resin.
10.2.2.6Gel times used with the laminating resinIdentify the gel times used with the laminating resin at each stage of the laminating process, and the means by which the gel time will be monitored and controlled.
10.2.2.7Method of application of the reinforcing material and laminating resinDescribe the method of application of the reinforcing material and laminating resin. Include direction of lay-up, location of laps, precutting and templating of operations used, methods used to wet out and consolidate the laminate and to remove air, and methods used to monitor and control resin content. Provide sketches detailing treatment of laps and doubler at chines, keel, transom corners, stem, and doublers.
10.2.2.8Cored laminateIf a cored laminate is used, describe the type of core and whether solid, scored, perforated or otherwise machined to improve conformity to the laminate. Describe the method used to precoat the core. Describe the method of preparing and bedding the core in the laminate and of assuring complete contact of the core with the laminate. If a syntactic foam bedding material is used, describe the methods used to mix, catalyse and apply the bedding foam, and the means by which the gel time will be monitored and controlled. Describe the methods by which complete contact of the core with the bedding foam will be monitored and maintained.
10.2.2.9Secondarily bonded structures and doublersDescribe methods used to install secondarily bonded structures and doublers. Describe surface preparation and cleaning methods.
10.2.2.10Surface sealing resinIdentify the surface sealing resin used. Describe method of application, means of achieving surface cure, and means of controlling thickness.
10.2.3Assembly
10.2.3.1Part at time of removal from the moldDescribe the part at time of removal from the mold. Identify the structural components such as bulkheads and framing which are installed, Barcol readings taken, and whether surface sealing resin has been applied.
10.2.3.2Methods used to remove the part from the moldDescribe the methods used to remove the part from the mold.
10.2.3.3Laminate inspection and repair proceduresDescribe laminate inspection and repair procedures.
10.2.3.4Edge trimming and sealing proceduresDescribe edge trimming and sealing procedures.
10.2.3.5Preparation for final assembly and final assembly of major structural connectionsDescribe the method of preparation for final assembly and final assembly of major structural connections. Include the hull-deck connection and other major structural connections, if used.
10.2.3.6Storage and protection of parts prior to final assembly, finish painting and deliveryDescribe the method of storage and protection of parts prior to final assembly, finish painting and delivery.
References
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