TPi Arcade, Inc.
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TPi Arcade, Inc.
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V-Process Overview, Applications & Service
Casting Process Comparisons
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Casting Process Comparisons 

V-PROCESS Castings - Extremely fine sand is 'vacuum packed' around pattern halves. The pattern is removed and metal poured into cavity. The vacuum is released and the casting removed.

Typical Size Range
Tolerances
Surface Finish
Min. Draft Required
Min. Section Thickness
Typical Order Quantities
Typical Tooling Costs
Nominal Lead Times
Up to 150 lbs � .010" for the first 1", then add
� .002" per inch.
Add a maximum .020" across parting line
125-150 RMS
None
.125"
All
$3,000 to $14,000
Samples: 2 to 6 weeks Production: 2 to 6 weeks after approval

Sand Castings - Treated sand is molded around a wood or metal pattern. The mold halves are opened and the pattern removed. Metal is poured into the cavity. The mold is broken and the casting removed.
Typical Size Range
Tolerances
Surface Finish
Min. Draft Required
Min. Section Thickness
Typical Order Quantities
Typical Tooling Costs
Nominal Lead Times
Ounces to tons � 1/32" to 6", then add � .003" per inch.
Add �.020" to .090" across parting line
200-550 RMS
1 to 5 degrees
.25"
All
$800 to $4,000

Investment (Lost Wax) Castings - A metal mold makes wax replicas. These are joined and surrounded by an investment material. Wax is melted out and metal is poured into the cavity. The molds are broken and the casting removed.
Typical Size Range
Tolerances
Surface Finish
Min. Draft Required
Min. Section Thickness
Typical Order Quantities
Typical Tooling Costs
Nominal Lead Times
Ounces to 20 lbs � .003" to 1/4"
� .004" to 1/2"
� .005" to 3", then add � .003" per inch
63-125 RMS
None
.060"
Under 1000
$3,000 to $20,000

Permanent Mold Castings - Molten metal is poured into a steel mold. The mold is opened and the casting is ejected.
Typical Size Range
Tolerances
Surface Finish
Min. Draft Required
Min. Section Thickness
Typical Order Quantities
Typical Tooling Costs
Nominal Lead Times
Ounces to 100 lbs � .015" to 1", then add � .002" per inch.
Add �.010" to .030"
across parting line
150-300 RMS
2 to 5 degrees
.1875"
500+
$5,000 to $25,000

Plaster Mold Castings - A plaster slurry is poured into the pattern halves. After setting, the mold is removed from pattern, baked, assembled and metal poured into the cavity. The mold is broken and the casting removed.
Typical Size Range
Tolerances
Surface Finish
Min. Draft Required
Min. Section Thickness
Typical Order Quantities
Typical Tooling Costs
Nominal Lead Times
Ounces to 50 lbs � .005" to 2", then add � .002" per inch.
Add �.010" across parting line
63-125 RMS
1/2 to 2 degrees
.070"
Prototypes up to 250 pcs
$3,000 to $15,000

Die Castings - Steel dies, sometimes water cooled, are filled with molten aluminum. The metal solidifies, the die is opened and the casting ejected.
Typical Size Range
Tolerances
Surface Finish
Min. Draft Required
Min. Section Thickness
Typical Order Quantities
Typical Tooling Costs
Nominal Lead Times
Ounces to 15 lbs � .002" per inch.
Add �.015" across parting line
32-63 RMS
1 to 3 degrees
.030" to .060"
2500+
$10,000 to $100,000


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