|PREPARING TEKSIL RUBBER MOLD|
Parts or models are laid out on a disc of uncured TEKSIL silicone or organic mold rubber. Depending upon model/pattern thickness and shape, cavities may be cut or molded by hand to accommodate the part. The uncured TEKSIL rubber mold material is soft and pliable like clay.
The mold parting line is formed at this stage and can be built up or lowered around any section of the model/pattern. Parts of any complexity can be handled. Cores, inserts and pull-out sections can also be easily incorporated, if required.
Mold parting compound is sprayed on the un-cured mold and "Acorn" nuts are arranged around the edge where (like pins of a die) they precisely position the mold halves to each other.
After preparation, the mold is placed in a vulcanizing frame. This frame is placed in the heated vulcanizing press for curing. The combination of heat and pressure forces the rubber mold material into all crevices and around all details of the model/patterns.
The heat cross-links and cures the Rubber Mold. The resulting mold is tough, resilient, dimensionally accurate, heat and chemically resistant.
After vulcanization the mold is easily flexed to release the patterns (and later, parts) from the cavities. This is true even for patterns with a wide variety of undercuts.
|GATING & VENTING|
The gates, runner system and air vents are easily cut into the cured rubber mold with a sharp knife or scalpel. Air vents may also be drilled into the cavity to aid in venting of entrapped air or gases.
Similar gating and venting systems are used for both metals and plastics, so both materials can be cast in the exact same mold for evaluation, if desired.
|PLACING MOLD IN CENTRIFUGAL SPIN-CASTER|
The mold is placed into the Tekcaster - the patented, front-loading unit shown above. The mold is automatically centered and closing the door actuates a pneumatic mold clamp.
Spin speed, clamping pressure and cycle time are fully adjustable with the solid-state digital controls.
|POURING & SPIN-CASTING|
After the spin cycle starts, the liquid metal, plastic or wax is poured into the Tekcaster.
Pressure caused by centrifugal force pushes the liquid through the mold's runner system, completely filling every section, corner, detail and surface finish in each mold cavity.
|REMOVAL OF CENTRIFUGAL SPIN-CAST PARTS|
After metals solidify and plastics set up, the parts are quickly removed from the mold. With metal, 50 to 60 cycles per hour are readily made; with plastic or wax, 8 to 12 cycles per hour are typical.
The gates, runners and vents are easily broken away by hand. Castings are ready for assembly, for painting, plating or coating with no additional clean-up. Spin-Casting is a precision casting process producing high integrity, close tolerance parts comparable to die casting or plastic injection techniques.
Rubber Mold Centrifugal Spincasting is suitable for casting a wide variety of Industrial, Decorative and Novelty parts. Readily accepts inserts such as those used in Fishing Lure manufacturing. Cast parts may be finished or painted as required.