| CONLEY’S RUBBER COMPOUNDS |
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Organic Formulas
Our most popular rubber compounds are the organic formulas. These formulas have the greatest characteristics for elongation, tear strength, and wear resistance at the most economical cost.
CL-1 The most popular black compound has the best flexibility of all our formulas. Its elongation qualities make it the leading rubber in the industry for under cuts and piercing, drive and release. This compound is shipped throughout the world more than any other is.
F-11 Very popular, when the need to control parting lines and surface quality is a priority. It is a slightly firmer black formula after it is cured. These qualities are best suited for flat and insert types of pieces.
C-100 The latest black formula was developed for base molds and then lead free alloys. It has the best of shrinkage, tear and wear strength with the highest heat transfer for obtaining the best quality pieces possible.
C-500 The most popular white formula for model molds and medallions. It has the lowest shrinkage of all our compounds.
C-600 A firm 75 durometer black compound. Used for low shrinkage applications with better wear resistance than the C-500.
CONLEY’S RUBBER COMPOUNDS
Silicone Rubbers
Silicone rubbers are used where high heat alloys and plastics are required. Zinc and leaded alloys can reach temperatures of 700°F- 950°F. Polyester and epoxy resins can generate high temperatures as well. The standard silicone set of rubber consists of 4 each 5/16" thick discs, that have kraft paper on the bottom and plastic on the top.
5OD Red Silicone A soft flexible material for spin casting of wax and plastic patterns.
60D Blue Silicone The most popular, general-purpose silicone which can be used for lead/tin alloys, zinc, wax, and plastics This compound the most economical and multipurpose silicone that we manufacture.
70D Pink Silicone A high durometer silicone compound which makes it great for thick or thin pieces without distortion. The flexibility is greatly reduced in this compound.
AVITAR Green Silicone A 65 durometer, material with superior tear strength, for casting pewter, plastic, and wax patterns.
HT-300 Grey A 60 durometer, with very high temperature and tear strength. Suitable for zinc where mold life is required.
Brown An inexpensive material used to back the center of the mold.
RUBBER VULCANIZING PROCEDURE
FOR
ORGANIC AND SILICONE RUBBER
300-325F CURE SCHEDULE
Pre-heat vulcanizer for 45 minutes with frame inserted.
Remove frame with thermal gloves and coat the interior surface with a dry lubricate spray or powder before inserting rubber.
Powder rubber with fine talc or separating powder in a well ventilated powder box.
Arrange models & locknuts on the rubber and place in the mold frame with a pear of tweezers and place the cover on the frame.
Insert the mold frame into the vulcanizer and immediately bring press to contact both sides of mold frame, and allow to preheat for 5 minutes.
Steadily increase clamping pressure [30 sec.] to approx. 3000psi for a 9" and 4000psi for a 12" on a 30-ton hydraulic jack.
Cure for 60 -70 minutes per each 1@ of silicone.
Check vulcanizer temperature before removing the pressure.
Caution if temperature is in excess of 25 normal range, turnoff the power and allow vulcanizer to cool to room temperature before opening. As molten metal and or rubber may be released under extreme conditions.
Remove mold frame from press slowly, then remove top plat of the mold frame and test rubber in several spots with a screw driver, to ensure that it has properly cured.
Remove mold from the frame and open slowly as not to tear any rubber. |
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