Base

This RFQ was sourced on www.MFG.com in CANADA for Shell Mold Casting


Production of a base. Approximately 13" O.D. x 34" long. Please see drawing Drawing R7736 IRON for dimensions and specifications. Please see some photos of current production attached - these are currently being fabricated from steel pipe. Material: Ductile Iron: ASTM A536, Grade 65-45-12 The dimensions shown on drawing R7736 IRON are finished sizes, and all EXTERIOR surfaces require machining. As Buyer requires that quotes are for supplying finished (machined)parts, it is up to the foundry and machine shop to determine the most efficient and economical level of machining allowance to be added to the machined surfaces. Calculated weight for this part is 112 lbs. each (finished weight). The actual casting weight will depend on the level of machining allowance added to the exterior. Quote qty = 50 pcs. or 100 pcs. or 150 pcs. per order. Estimated annual usage = 1,000 pcs. The country of origin name must be cast into the castings (inside). The location of this lettering is not important and not defined - it can be placed anywhere on the interior surface that is desirable by the foundry, as long as it is easily seen from the outside and is legible in the finished product. Buyer is open to exploring a variety of molding methods for this part (i.e. sand casting, v-process, etc.), as long as the surface finish and appearance of these castings is very high. The finished castings shall be smooth, free of injurious defects, and shall conform substantially to the dimensions of the drawing. The outside surfaces should be machined to achieve a surface finish of 125 RMS minimum. Outside surfaces need to be inspected to ensure no unacceptable cracks or voids are present. Parts must pass NDT using MPI; criteria = ASTM A903, Level 1. Voids (nonlinear indications) larger than 1/16" in dia. are not acceptable and will require welding and smooth grinding before shipping. Cracks (linear indications) longer than 1/16" are not acceptable and will require welding and smooth grinding before shipping. No coating or special surface treatments are required. No filler materials can be added to the surface to fill voids, and no paint or powder coat of any type can be used to cover these castings. Ideally, the repair of voids, cracks and/or other defects should be taken care of prior to machining to ensure the most consistent finished surface is present. Please quote pricing FOB the closest Port of Exit Quote new pattern/set up costs as a separate line item. Buyer would be very interested to hear about any ideas or proposals that might have to improve the surface quality/appearance of this part. Please advise production and delivery times in price quote. Buyer will need to know the pattern construction time, production time for first sample, and upon approval of the sample - the time it will take to produce the first 100 pcs. of these bases. A sample will have to be produced (and shipped COLLECT to us via AIR FREIGHT) for approval prior to full production taking place. Quote deadline: March 2nd, 2007.

Buyer Information

Industry Construction
City/Region Surrey, British Columbia
Country CANADA

RFQ

RFQ Number 399620
Material Alloy Steel
Material Grade ASTM A536, Grade 65-45-12 Ductile Iron

Technical Specifications

Category Shell Mold Casting
Dimensions

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Shell Mold Casting: Shell casting is the process by which sand is mixed with a plastic binder and put into a box. Sand is dropped onto a heated metal pattern to form the casting mold shell. The mold shell may be in two or more pieces depending on the complexity of the part. The various parts of the molding shell are then glued or clamped together, placed in a pouring jacket and stabilized by surrounding the shell-casting mold with shot or sand. Shell casting produces parts that have a good surface finish, with a tight tolerance. Additionally, the production rate for shell casting is higher than with conventional sand molding. Metals typically used in shell casting include cast iron and alloys of aluminum and copper.