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Contactscale's Services | |||||
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On Demand Full Scale Plugs and Patterns | |||||
tel: 408.320.4972 Services: Examples: |
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Crate and Ship | |||||
We ship worldwide. | |||||
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The finishing begins After any part is machined from either EPS or tooling foam it must be sealed and primmer. This can be time consuming and is very important. The finished surface will reflect what the final part will look like. This is the final step prior to building the mold. |
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Knowledge Base | |||||
• CAD ( Computer Aided Design ) • CAM ( Computer Aided Machining ) • CNC ( Computer Numerical Control ) |
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• Epoxy Resin vs. Polyester Resin In any high-tech structural application, where strength, stiffness, durability and light weight are required, epoxy resins are seen as the minimum standard of performance for the matrix of the composite. This is why in aircraft and aerospace applications, as well as offshore racing boats, epoxies have been the norm for years. However 95% of pleasure boats under 60 feet today are still made with polyester resin. The main consideration for materials selection for most composite builders is cost, with performance and more importantly value for money often being a secondary consideration. As a general rule epoxy resins are twice as expensive as vinyl ester resins and vinyl ester resins are twice as expensive as polyesters. Since the resin can constitute 40 to 50% of the weight of a composite component, this price difference is seen as having a significant impact on the cost of the laminate. However, when considered against the cost of the whole structure (the car) the cost is relatively insignificant, and the value of higher quality and long term gain of better durability (therefore better resale value) can be tremendous. What contributes to this better value…..? Epoxy resins have performance advantages over polyester and vinyl esters in four major areas: • Better adhesive properties (the ability to bond to the reinforcement or core) • Molding tolerances (Very little shrinkage) • Superior mechanical properties (particularly strength and stiffness) • Improved resistance to fatigue and micro cracking |
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