by U.S. Dept. of Health, Education, and Welfare, Public Health Service, Center for Disease Control, National Institute for Occupational Safety and Health, Division of Technical Services, for sale by the Supt. of Docs., U.S. Govt. Print. Off. in Cincinnati, Washington .
Written in English
|Series||DHEW publication ; no. (NIOSH) 76-158|
|The Physical Object|
|Pagination||iii, 32 p. :|
|Number of Pages||32|
Wet lay-up using hand or spray techniques is one of the simplest methods of combining a fiber reinforcement with a solidifying resin to form a composite structure. This article describes several wet lay-up processes - including contact molding, spray molding, vacuum bag molding, and autoclave molding - suited for making parts on open-faced. Spray-Up This process utilizes a chop gun to simultaneously spray the fiberglass, catalyst, and resin at the required thickness on the mold. Some of the benefits of this type of fiberglass manufacturing include: low tooling cost, typically lower part cost, parts that are smooth on one side, can be used for low and medium production quantities. LAYUP, SPRAYUP. Hand lay-up and spray-up are low to medium volume molding methods suitable for making boats, tanks, housings, machine components and other shapes. These processes provide only one finished surface. Several of its major benefits include low tooling cost and the ability to make extremely large parts economically. Fiberglass spray lay-up process is similar to the hand lay-up process. The difference comes from the application of the fiber and resin material to the mold. Spray-up is an open-molding composites fabrication process where resin and reinforcements are sprayed onto a reusable mold.
The most common manufacturing process for fiberglass is the wet lay-up or chopper gun spray process using an open mold. The shape of the part is determined by the shape of the mold, and the mold surface is typically in contact with the exterior of the part. Mold release is first applied to the mold to prevent the fiberglass part from adhering. Fiberglass, as a term, is really a misnomer. Glass fiber is one of the many materials that can be used along with resin (plastic) to create a strong and light composite structure. Those materials include glass-fiber (of course), cloth (cotton or man-made), carbon-fiber, non-woven glass or carbon mat, coir (a coconut fiber), modal (beech tree. Sprayup is a semi-manual proces. s in which resin and fiber are applied to an open mold with a spray gun (the gun that cuts glass fiber, or roving, and applies it to the part is known as a "chopper gun"). As in hand layup, gel coat is often applied as one step in the fabrication process. Spray-Up also known as chop method of creating fiberglass objects by spraying short strands of glass out of a pneumatic gun. This method is used often when one side of the finished product is not seen, or when large quantities of a product must be made cheaply and quickly without regards to strength. Corvette fenders and boat dinghies are commonly manufactured this way.
Fiberglass layup and sprayup: good practices for employees U.S. Dept. of Health, Education, and Welfare, Public Health Service, Center for Disease Control, National Institute for Occupational Safety and Health, Division of Technical Services ; for sale by the Supt. of Docs., U.S. Govt. Print. Off Cincinnati: Washington Hand Lay~Up and Spray~Up Fabrication Submit a Listing to the Exchange The International Fiberglass Exchange (IFE) is a member based world wide information exchange designed for companies and individuals who BUY / SELL / TRADE goods and commodities. Fiberglass layup basics using MAX CLR A/B Epoxy Resin System. Purchase this product on eBay: MAX CLR A/B 24 Ounce Kit: h. The result is a layup with a much better resin to fabric ratio that is lighter, stronger and much more consistent than a hand layup. - Resin Infusion - This method is similar to vacuum bagging, except that the layup is done dry and when the vacuum is drawn, resin is allowed to flow into the layup at one or more points until in completely.