But woven roving is not used to replace 3 layers of cloth. I wont bother to go into the discussion here on fabric loading, mass, strength, fiber orientation, resin matrix, etc. There is a GIGANTIC misconception that fiberglass gains its "strenth" from mass thickness. Nor how or why these fabrics are manufactured. How would it be weaker that the material it is constructed of ? You obviously do not understand how fabrics "load" under use. Where do you get this from? Are you talking about GUN Roving or Woven Roving? Woven roving is a very strong fabric material. Its sole purpose is to make in one lamination what would take 3-4 seperate layers of cloth. ".Roving is weaker not stronger than regular glass, slightly. I dont your source for this information but is incorrect. So in this method of use, is chop OK?:confused: ![]() ![]() There are boat manufacturers that won't use any chop such as Allison, Stroker etc. Do they use chop? I don't know but even in the days of the "hand laid" Skeeter I have seen areas that may have been chopped so maybe they were hand rolling like pro-crap. Skeeter claimed hand laid hulls years ago but ended that claim when Yamaha purchased the company. There are some manufacturers that just won't say. Cajun, no longer in business, always admitted to using chop in their hulls. Again, not all chop, but some layers separating more substantial glass. Champion and Charger have both printed in past brochures their layup schedule and both included chop. Not all chop, just some for mat layers, fill, etc. Any honest Ranger dealer will tell you that ranger uses chop (2 have admitted this to me). I called Pro-Craft a few years back about their claim to being hand laid and they told me that they hand roll out their chopped layers and therefore can call the boat hand laid. These are a few but I'm sure there are more that won't admit it. It does not store any personal data.Ranger, Stratos, Champion, Charger, Big-O, Javelin, Pro-Craft, Nitro. The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. The cookie is used to store the user consent for the cookies in the category "Performance". This cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Other. The cookies is used to store the user consent for the cookies in the category "Necessary". The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". The cookie is used to store the user consent for the cookies in the category "Analytics". These cookies ensure basic functionalities and security features of the website, anonymously. Necessary cookies are absolutely essential for the website to function properly. Profibre produces a wide variety of parts using the spray up process for the following industries: Ideal process for the production of low-to-medium volume parts.Speed of laminating is increased so parts can be demoulded quicker 3-4 times per shift.Lower resin to glass ratio can be achieved giving stronger parts.Other benefits of the spray up process include: ![]() ![]() Spray up moulding is very effective in the production of complex shapes and there are virtually no restrictions on the size of part that can be produced. Several layers of chopped material or specialised reinforcements can be added to the laminate depending upon the requirements of the application. The spray up laminate is then consolidated by hand to achieve a homogeneous laminated surface. A skilled operator is required to ensure correct application of glass to mould. The resin and glass may be applied separately or simultaneously “chopped” in a combined stream from a chopper gun. Spray-up or chopper gun moulding is an open-moulding composites production process where resin and reinforcements are sprayed onto a mould.
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