enow.com Web Search

Search results

1. Results from the WOW.Com Content Network

2. Resin casting - Wikipedia

   en.wikipedia.org/wiki/Resin_casting

   The casting can also be done in a vacuum chamber (when using open molds) to either extract these bubbles, or in a pressure pot, to reduce their size to the point where they aren't visible. Specialist equipment can enable closed molds to be filled whilst under vacuum, a process known as resin vacuum casting , where air and gas bubbles are ...

3. Transfer molding - Wikipedia

   en.wikipedia.org/wiki/Transfer_molding

   Things to be done to limit these molds include pressing the resin in at a high pressure, keeping the fiber distribution uniform, and using a high quality properly degassed base resin. Sharp corners. Figure 3: Sharp corner generates voids in transfer molding. Sharp corners are the problems with all mold based manufacturing, including casting.

4. Pressure bag moulding - Wikipedia

   en.wikipedia.org/wiki/Pressure_bag_moulding

   The female mold can also be heated. Excess resin is forced out along with trapped air. Due to the lower cost of unskilled labor, this method is used extensively in the production of composite helmets. For a helmet bag moulding machine, cycle times vary from 20 to 45 minutes, but if the molds are heated, the finished shells require no further ...

5. Compression molding - Wikipedia

   en.wikipedia.org/wiki/Compression_molding

   Compression molding is a method of molding in which the molding material, generally preheated, is first placed in an open, heated mold cavity. The mold is closed with a top force or plug member, pressure is applied to force the material into contact with all mold areas, while heat and pressure are maintained until the molding material has cured; this process is known as compression molding ...

6. Investment casting - Wikipedia

   en.wikipedia.org/wiki/Investment_casting

   Vacuum pressure casting (VPC), properly referred to as vacuum assist direct pour, uses gas pressure and a vacuum to improve the quality of the casting and minimize porosity. Typically VPC machines consist of an upper and a lower chamber—the upper chamber, or melting chamber, housing the crucible, and the lower casting chamber housing the ...

7. Rotational molding - Wikipedia

   en.wikipedia.org/wiki/Rotational_molding

   Rotational molding machines are made in a wide range of sizes. They normally consist of molds, an oven, a cooling chamber, and mold spindles. The spindles are mounted on a rotating axis, which provides a uniform coating of the plastic inside each mold. [5] Molds (or tooling) are either fabricated from welded sheet steel or cast.