Vacuum Casting Mold Life: Silicone Tool Wear, Batch Planning and Quality Control

Vacuum casting mold life is the usable number of casting cycles a silicone tool can complete before dimensional accuracy, surface quality, sealing or safe demolding no longer meets the project requirements. Buyers often expect one fixed answer, such as 15, 20 or 25 parts per mold. In practice, the usable yield depends on part geometry, silicone selection, polyurethane chemistry, cure temperature, undercuts, mold split, operator handling and the acceptance standard.

A silicone mold may continue producing physically complete parts after its cosmetic surfaces or critical dimensions have drifted beyond approval. For this reason, mold life should be defined by quality rather than by the moment the tool tears completely.

This guide explains how silicone vacuum-casting tools age, what shortens their life, how to plan multi-mold batches, which dimensions and cosmetic features should be monitored and what information to include in an RFQ for consistent low-volume polyurethane parts.

Quick Answer: How Many Parts Can a Vacuum Casting Mold Make?

A silicone vacuum-casting mold commonly produces a limited series rather than an unlimited production run. A planning assumption in the range of roughly 15 to 25 acceptable castings per mold is often used for straightforward parts, but it is not a guarantee or a universal specification. Difficult undercuts, sharp textures, aggressive resins, high cure temperatures or strict optical requirements can reduce usable life. Simple geometry, gentle demolding and a compatible process can sometimes extend it.

The correct commercial question is not only “How many shots will the mold survive?” It is:

How many conforming parts is the supplier planning to deliver from each mold under the agreed dimensional and cosmetic acceptance criteria?

The quotation should identify planned mold quantity, cavity count, expected acceptable yield, replacement-mold assumptions and how first, middle and late mold-life parts will be inspected.

What Counts as One Shot, One Part and One Mold?

Terminology can make two quotations look different even when their technical plan is similar.

Shot or Casting Cycle

One shot is one fill-and-cure cycle. If a mold has one cavity, one successful shot usually produces one part. If it has two cavities, one shot may produce two parts.

Gross Castings

Gross castings include every cycle attempted, including setup pieces, color-adjustment samples, destructive-test specimens and rejected parts. They are not the same as delivered quantity.

Acceptable Yield

Acceptable yield is the number of conforming parts available after inspection. The mold plan must include allowance for normal startup, inspection and process losses.

Mold or Tool

A silicone mold is the complete flexible tool made around a master pattern. Depending on geometry, it may contain one cavity, multiple cavities, loose cores, inserts, support shells and a deliberately cut split line.

Ask the supplier to quote delivered good parts, not only theoretical cycles.

Why Silicone Molds Have a Limited Life

Silicone tools are flexible and quick to manufacture, which is why vacuum casting can reproduce complex prototype geometry without a machined metal mold. The same flexibility also means the tool experiences mechanical, chemical and thermal stress during every cycle.

The main aging mechanisms are:

• Tearing at thin sections, sharp corners, vents or the cut split line.

• Permanent deformation or loss of closure accuracy.

• Swelling or softening from contact with casting chemistry.

• Surface erosion, gloss change or texture loss.

• Thermal aging during repeated heated cures.

• Damage during part extraction, cleaning or insert handling.

• Gate and vent wear that changes flow or flash behavior.

• Contamination, residue or release-agent buildup.

These mechanisms can occur together. A mold may first show heavier flash, then lose local texture and finally tear during demolding.

Mold Life Is Defined by the Acceptance Standard

The same tool may have different usable lives for different projects.

Cosmetic Prototype

A high-gloss display housing may reject slight haze, a visible split-line change or a small texture defect. Its cosmetic mold life can end while the tool still produces dimensionally usable parts.

Engineering Test Part

A hidden bracket or airflow duct may allow minor surface wear but require stable wall thickness, mounting holes and leak performance. The dimensional or functional limit controls mold retirement.

Clear Optical-Looking Part

Transparent windows and light-guide mockups are sensitive to surface scratches, haze, contamination and microbubbles. Their acceptable mold life may be shorter than that of opaque parts with the same geometry.

Flexible Part

Rubber-like castings can be easier to demold in some shapes, but certain resin systems, thin lips and deep undercuts can still damage the silicone. Hardness and cure condition affect both part removal and tool exposure.

Define visible surfaces, defect limits, critical dimensions and functional tests before the mold is built.

Master Pattern Quality Sets the Starting Point

The silicone tool replicates the master pattern. It does not automatically improve layer lines, scratches, edge waviness or incorrect geometry.

A suitable master should be reviewed for:

• Dimensional allowance for expected casting behavior.

• Surface finish on every visible zone.

• Texture depth and direction.

• Sharp corners that may create fragile silicone.

• Gate, vent and split-line planning.

• Draft or release path where practical.

• Insert, magnet, bushing or loose-core interfaces.

• Engraving, logos and fine details.

SLA masters are common because they reproduce fine geometry and can be sanded and painted to a high cosmetic standard. CNC-machined masters may be preferred when material stability, sharp controlled datums or a specific machined finish matters. Whichever method is used, the approved master becomes the origin of every copy.

Keep a controlled record of the master revision and finishing standard. Rebuilding a mold from a different master without approval can change dimensions, gloss or texture across the batch.

Silicone Material Selection

Silicone systems differ in hardness, tear strength, viscosity, shrinkage, temperature resistance and compatibility with polyurethane resins. The supplier selects the tool material based on geometry and casting process.

Softer Silicone

Softer material can flex around undercuts and reduce extraction force. However, it may deform more under the weight of liquid resin or closure pressure, affecting dimensions and split-line flash.

Harder Silicone

Harder material can support geometry more firmly and retain shape, but it may be less forgiving during demolding and can concentrate stress at undercuts or thin mold features.

High-Tear-Strength Formulations

High tear strength helps resist crack growth near split lines and cores. It does not eliminate poor mold design or damaging extraction paths.

Temperature and Chemical Compatibility

The silicone must tolerate the resin cure schedule and repeated exposure to reactive components. A material suitable for one casting system may age differently with another.

The commercial specification does not always need to name a silicone brand, but the supplier should control the selected grade and avoid changing it without review when repeat batches depend on consistency.

Part Geometry That Shortens Mold Life

Geometry is often the strongest mold-life driver.

Deep Undercuts

Undercuts require the silicone to stretch during extraction. The deeper the retention and the stiffer the cured part, the higher the local strain on the mold.

Thin Slots and Knife-Edge Silicone

A narrow slot in the part may create a thin blade of silicone. This feature can tear, fold or deform even when the part itself is not especially complex.

Deep Ribs and Tall Bosses

Silicone between closely spaced ribs or around deep bosses can be difficult to release. Tall thin tool features may bend or break.

Sharp Internal Corners

Sharp corners concentrate tear stress. A small radius on the part can substantially improve silicone durability and also reduce stress in the cast component.

Aggressive Texture

Deep texture increases mechanical grip. The mold must flex over the surface at every demolding cycle, and local texture peaks may wear.

Large Flat Panels

Large panels can deform if the flexible mold lacks adequate support. Repeated opening and handling may change flatness or edge alignment.

Closed Loops and Re-entrant Geometry

Handles, hooks, internal grooves and continuous undercuts can require complex split lines, loose cores or sacrificial tool sections. These designs should be reviewed before quoting a normal mold yield.

Design Changes That Can Extend Tool Life

When function permits, small geometry changes can improve both mold durability and part consistency.

• Add radii at sharp internal corners.

• Reduce undercut depth or provide a lead-in surface.

• Open a closed feature to an edge.

• Increase spacing between tall ribs or bosses.

• Thicken fragile silicone regions by adjusting local geometry.

• Move a fine detail away from the mold split.

• Separate a complex component into cast subparts for later assembly.

• Replace a cast hole with drilling or secondary machining when economical.

• Use a loose insert or core for a difficult internal feature.

These changes should be evaluated against the final production design. A vacuum-cast prototype can intentionally differ in hidden tooling details, but differences that affect functional testing must be documented.

Mold Split, Parting Line and Cut Strategy

After the silicone cures around the master, the mold is opened along a planned path. Some molds use a defined construction split; others are carefully cut to create interlocking registration features.

The split strategy affects:

• How easily the master and cast part can be removed.

• Where flash and witness lines appear.

• Whether the mold closes in the same position each cycle.

• The thickness of vulnerable silicone sections.

• Gate and vent access.

• Operator handling time.

A complex zigzag cut can improve self-registration but may create many local stress points. A simple split can be durable but may leave a more visible line. The supplier should show the proposed split when cosmetic or sealing surfaces are involved.

Gates and Vents Affect More Than Filling

Gates introduce resin, while vents allow displaced air and excess material to leave the cavity. Their geometry also affects mold wear and finishing.

Gate Area

Repeated trimming near the gate can nick the mold. A large gate may improve filling but increase removal force and the size of the finishing mark.

Vent Tips

Very fine vent channels are vulnerable to tearing, blockage and accidental damage during cleaning. If a vent fails, bubbles or incomplete fill may appear even though the main cavity remains intact.

Resin Pressure and Mold Closure

Vacuum casting does not use injection-molding pressure, but resin head, vacuum sequence, mold clamping and thermal expansion can still affect split-line sealing. As registration wears, flash may increase.

Gate and vent locations should avoid critical cosmetic and sealing zones whenever possible.

Polyurethane Resin Chemistry and Mold Wear

Different casting resins expose the silicone to different temperatures, viscosities, cure times and chemical interactions.

Rigid Fast-Cure Resins

A fast reaction can generate heat and reduce working time. The cured part may be stiff and difficult to flex during extraction, increasing mechanical stress on undercuts.

Flexible Resins

Flexible castings can sometimes release more easily, but tacky surfaces, long cure schedules or chemistry-specific interaction may affect the tool. Hardness alone does not predict mold life.

Clear Resins

Clear parts expose small surface imperfections and contamination. The mold may remain mechanically sound after optical appearance has degraded.

Filled or Specialized Systems

Fillers, pigments, flame-retardant packages and high-temperature systems can change viscosity, abrasion, exotherm and cure conditions. Confirm mold-yield assumptions with the exact proposed material.

Moisture Sensitivity

Polyurethane components can react with moisture and create bubbles or inconsistent cure. Moisture is primarily a part-quality risk, but repeated failed cycles also consume mold life without producing acceptable parts.

Do not assume that changing to a different resin late in the project leaves the mold plan unchanged.

Cure Temperature and Thermal Cycling

Many vacuum-cast resins use controlled heat for mold preconditioning, curing or post-curing. Repeated thermal cycles can age the silicone and change dimensions.

Important controls include:

• Mold preheat temperature and uniformity.

• Resin component temperature.

• Cure oven set point and actual load temperature.

• Time before demolding.

• Cooling condition between cycles.

• Post-cure performed inside or outside the tool.

Demolding too early may distort the part and require excessive handling. Excessive time or temperature can reduce throughput and expose the mold to unnecessary heat. Follow the validated material process rather than using one cure schedule for every resin.

Demolding Technique Is a Major Life Driver

The operator must remove each cured part without cutting, over-stretching or twisting the silicone.

A controlled demolding method may use:

• A defined opening sequence.

• Release from shallow features before deep undercuts.

• Temporary flexing of the cast part where material permits.

• Loose cores removed in a planned order.

• Air assistance or non-damaging tools.

• Two-person handling for large molds.

• Support fixtures that prevent the tool from hanging under its own weight.

Pulling on one convenient edge can create a crack that grows with every cycle. Training and repeatable work instructions matter, especially for batches produced by several operators or shifts.

Release Agents: Benefit and Trade-Off

A release agent may reduce sticking and extraction force, but it can also affect paint adhesion, bonding, gloss, texture replication or later printing.

Before using one, confirm:

• Compatibility with the silicone and casting resin.

• Required application amount and frequency.

• Whether the finished part will be painted or bonded.

• Whether residue is acceptable on optical or medical-looking prototypes.

• Cleaning method and validation.

More release agent is not automatically better. Excess application can create surface variation and contaminate subsequent finishing.

Support Shells and Mold Fixturing

Flexible silicone often requires a rigid mother mold, casting box, support shell or external fixture to retain shape.

The support system should:

• Locate mold halves repeatably.

• Support large or thin areas against bulging.

• Maintain gate and vent orientation.

• Permit easy opening without prying against delicate edges.

• Control closure without crushing the silicone.

• Allow safe handling at cure temperature.

If the support is inconsistent, dimensional variation may be blamed on mold aging when the actual cause is closure or fixturing.

How Mold Wear Appears in Finished Parts

Mold aging is usually detected through trends rather than one dramatic failure.

Do not declare the mold exhausted from one defect until process, material and handling causes are checked.

Dimensional Drift Across Mold Life

The first acceptable part and the final acceptable part may not measure identically. Silicone can relax, swell, shrink, deform or lose registration.

Critical dimensions should be selected based on function, not on what is easiest to measure. Typical monitoring points include:

• Overall envelope dimensions.

• Hole and boss positions.

• Wall thickness at mounting interfaces.

• Flatness or profile of mating surfaces.

• Insert location and orientation.

• Snap, latch or seal features.

• Connector, display and PCB interfaces.

The measurement method must use consistent temperature, conditioning, datums and restraint. A flexible polyurethane part can show different results under different fixturing forces.

Plot results by mold number and shot sequence when the program is important enough to require trend control. This distinguishes mold-life drift from random variation.

Cosmetic Drift and Appearance Approval

Cosmetic acceptance requires more than a statement such as “good surface.” Define:

• A-surfaces, B-surfaces and hidden zones.

• Color reference and lighting condition.

• Gloss or texture target.

• Allowable bubbles, pinholes, flow marks and inclusions.

• Split-line, gate and vent visibility.

• Permitted sanding, polishing, paint or touch-up.

• Whether parts assembled side by side must match.

Approve a physical master or first article when appearance is important. Photographs are useful records but may not reproduce gloss, transparency or subtle color accurately.

First, Middle and Last-Part Inspection

A practical mold-life control plan samples the batch over time.

First-Part Approval

Inspect early castings after the process is stable. Confirm material, color, surface, critical dimensions, inserts and functional fit before completing the batch.

Mid-Life Check

Measure selected characteristics around the planned middle of the mold run. Look for increasing flash, vent damage, surface change or dimensional trend.

Late-Life Check

Inspect parts near the planned retirement point more closely. If quality approaches the limit, retire the tool before a major tear creates scrap or cosmetic damage.

Replacement-Mold Correlation

When a second mold is used, compare its first accepted parts with retained samples from the first mold. New tools can introduce master, cutting, closure or finishing differences even when they use the same CAD.

The exact sampling frequency depends on risk, batch size and requirements. It should be agreed before production.

Mold Identification and Traceability

For multi-mold programs, each delivered part should be traceable to a mold or production batch when practical.

Useful records include:

• Master pattern revision.

• Mold identification number.

• Silicone batch or controlled material record.

• Casting resin product and lot.

• Pigment formula and batch.

• Shot or sequence number where required.

• Cure and post-cure record.

• Operator or production date.

• Inspection and rework disposition.

Traceability helps investigate differences without treating the whole order as one anonymous population.

Batch Planning: From Required Quantity to Mold Count

The required delivered quantity should be separated from the assumed acceptable yield per mold.

A conceptual planning calculation is:

Required mold count = delivered quantity divided by planned acceptable parts per mold, rounded up, plus any justified schedule or risk capacity.

For example, an order of 60 acceptable parts cannot safely be planned as three molds merely because a marketing statement says 20 parts per tool. The supplier must consider:

• Setup and approval castings.

• Destructive tests or retained samples.

• Expected reject rate.

• Geometry-specific tool risk.

• Whether mold lives overlap or run sequentially.

• Color and material batch control.

• Delivery schedule and partial shipments.

The planned yield should be conservative enough to deliver good parts without depending on a worn tool.

Sequential Versus Parallel Molds

Sequential Tooling

One mold is run first, and another is created or released when needed. This can reduce upfront tooling but creates schedule risk if the next mold is not ready when the first reaches its limit.

Parallel Tooling

Several molds are prepared and cast during the same production window. This increases capacity and schedule resilience but requires strong correlation of dimensions, color and surface between molds.

Staged Tooling

A first mold produces approval parts, then additional molds are made from the same approved master or a controlled duplicate. This reduces the risk of multiplying an unapproved design but must allow time for later tool creation.

Choose the plan based on quantity, deadline, mold risk and the cost of a late delivery.

Multi-Cavity Silicone Molds

A multi-cavity mold can produce more than one part per shot, but it is not always the best choice.

Potential advantages include:

• More output per cycle.

• Shared mixing and cure operations.

• Improved schedule for small parts.

Potential limitations include:

• Larger resin volume and stronger exotherm.

• More complex filling and vent balance.

• Larger flexible tool that is harder to support.

• Cavity-to-cavity dimensional or cosmetic differences.

• Loss of all cavities if one region tears badly.

• More difficult demolding and operator handling.

Identify cavities and inspect them separately when cavity differences could affect assembly.

Color Consistency Across Several Molds

Color variation can come from pigment measurement, resin batch, mix ratio, cure condition, part thickness and surface gloss. A new mold surface may also look different from a worn one.

For color-critical work:

• Use a physical color reference rather than only an RGB or hex value.

• Define lighting and gloss condition.

• Prepare controlled pigment formulas by weight.

• Use compatible resin and pigment batches where possible.

• Approve a representative cast sample.

• Compare parts from different molds side by side.

• Keep color records for repeat orders.

Painting can provide another route to controlled appearance, but paint adds its own thickness, adhesion, masking and inspection requirements.

Inserts, Magnets and Encapsulated Hardware

Threaded inserts, bushings, magnets, contacts or other hardware can be placed in the mold or installed after casting.

Insert casting affects mold life because the operator repeatedly positions rigid items near flexible silicone. Sharp edges can cut the tool, and poor location can prevent closure.

Control:

• Insert drawing and material.

• Orientation and depth.

• Retention or torque requirement.

• Surface cleaning and pretreatment.

• Masking of threads or functional faces.

• Location fixture or pocket.

• Whether hardware is customer-supplied.

Post-installed inserts may reduce tool risk and improve serviceability, while cast-in inserts can provide strong integration. Select the method from function and process reliability.

Repairing a Silicone Mold

Minor damage can sometimes be repaired, but the decision depends on location and acceptance requirements.

Possible repair targets include:

• A noncosmetic external tear.

• A damaged vent.

• A support or registration feature.

• A local split-line area with sufficient access.

Repair may change texture, dimensions, closure or visible witness marks. A repaired optical or A-surface cavity is unlikely to return invisibly to its original condition.

After repair, produce and inspect a new approval sample. Do not count a repair as proof that the original mold-life plan remains valid.

When to Retire and Replace the Mold

Retire the tool when it can no longer produce parts that meet the agreed requirements with a controlled process.

Triggers can include:

• A critical dimension trends beyond its action limit.

• Surface texture or gloss no longer matches the approval sample.

• Split-line flash exceeds the trimming or cosmetic limit.

• A tear threatens part quality or safe handling.

• Gate or vent damage creates repeated fill defects.

• Closure registration becomes unstable.

• Insert location can no longer be held.

• Repair would cost more or create more risk than replacement.

Do not wait for catastrophic failure if remaining delivered quantity justifies a replacement tool.

Mold Wear Versus Process Defect

Not every late-batch defect means the silicone has reached end of life.

Use records and retained samples to diagnose the cause before modifying the process or building another tool.

Quality Documents for a Controlled Batch

Depending on project risk, the supplier can provide:

• First-article dimensional report.

• Material product or technical data sheet.

• Resin and pigment batch record.

• Visual approval sample or photographs.

• Critical-dimension sampling report.

• Insert position, pull-out or torque checks.

• Hardness result for flexible materials.

• Functional fit, leak or assembly test.

• Nonconformance and rework record.

• Certificate of conformity when agreed.

Define documents in the RFQ. Adding a full report after production may require unplanned measurement or may be impossible if traceability was not collected.

Cost Drivers Related to Mold Life

Vacuum-casting cost is not only resin plus one silicone mold.

Mold-life-related cost includes:

• Master creation and cosmetic finishing.

• Silicone quantity and selected tool grade.

• Mold cutting, gates, vents and support shell.

• Loose cores and insert fixtures.

• Planned replacement molds.

• Setup, approval and retained samples.

• Inspection frequency and reports.

• Expected scrap and repair allowance.

• Correlation between multiple molds.

• Painting, polishing, trimming and assembly.

A quotation with fewer molds may not be less expensive if it assumes unrealistic late-life yield and creates delivery or quality risk.

When Vacuum Casting Is No Longer the Best Process

Vacuum casting is strong for short runs, complex prototype geometry and production-like appearance. As quantity or technical requirements change, another process may be more suitable.

Compare total program cost, material evidence, schedule and quality—not only price per part.

RFQ Checklist for Mold Life and Batch Planning

Include the following when requesting vacuum-cast parts:

1. Controlled 3D CAD and drawing revision.

2. Required delivered quantity, not only estimated shots.

3. Immediate batch and possible repeat-order quantities.

4. End-use function and material behavior to simulate.

5. Rigid, flexible, clear or specialized resin requirements.

6. Critical dimensions, datums and tolerance priorities.

7. Cosmetic surfaces, color, gloss and texture standards.

8. Acceptable gate, vent and split-line locations.

9. Undercuts, thin features and fragile details requiring review.

10. Inserts, magnets, hardware and assembly requirements.

11. Functional, environmental and destructive tests.

12. Inspection report and traceability requirements.

13. Delivery date, partial shipment and schedule priorities.

14. Whether several molds may be used and how cross-mold matching will be approved.

Ask the supplier to state planned mold count and acceptable yield rather than relying on a generic mold-life claim.

Questions to Ask the Vacuum Casting Supplier

• How many acceptable parts are planned from each mold?

• Does the quantity include setup, approval and destructive samples?

• How many cavities are in each mold?

• Which geometry presents the greatest tear or demolding risk?

• Where will the mold split, gate and vents appear?

• Which surfaces are expected to change first as the tool ages?

• How will critical dimensions be checked through the mold run?

• What triggers mold retirement or replacement?

• Are replacement molds included in the quotation?

• How will parts from several molds be matched for color and dimensions?

• Will all molds come from the same approved master?

• What traceability will identify mold, resin batch and production sequence?

Clear answers turn mold life from a marketing estimate into a controlled production plan.

Vacuum Casting Mold-Life Review Checklist

• Is the master revision controlled and cosmetically approved?

• Are critical and visible surfaces identified?

• Has the supplier reviewed undercuts, thin silicone and sharp features?

• Is silicone selection compatible with resin and cure temperature?

• Are mold split, gates, vents and support strategy defined?

• Is the demolding sequence practical and documented?

• Are release-agent and downstream finishing requirements compatible?

• Is acceptable yield per mold separated from theoretical cycles?

• Does mold count include setup, inspection and normal losses?

• Are first, middle and late mold-life parts inspected?

• Are multiple molds correlated and traceable?

• Are action limits and replacement triggers agreed?

• Is the process still economical compared with machining or rapid injection molding?

Frequently Asked Questions

Can one silicone mold always make 20 parts?

No. Twenty parts may be a planning estimate for a suitable project, but usable yield depends on geometry, silicone, resin, cure, demolding and acceptance criteria. Request the supplier’s planned acceptable yield for your specific part.

Why do undercuts reduce mold life?

The silicone must stretch around the cured undercut during every demolding cycle. Repeated strain concentrates at corners, thin regions and the split line, which can initiate tears or permanent deformation.

Does a flexible resin extend mold life?

Not automatically. A flexible part may release more easily, but resin chemistry, tack, cure temperature, geometry and tool compatibility still matter. Mold life should be evaluated with the exact material system.

Can a worn mold still make usable parts?

It may still produce parts that are complete but no longer meet cosmetic, dimensional or functional requirements. Usable mold life ends when the agreed acceptance limit is exceeded.

How can mold life be extended?

Use release-friendly geometry, suitable silicone, a well-planned split, controlled cure, supportive fixturing and careful demolding. Avoiding sharp corners, fragile tool sections and deep rigid undercuts can make a major difference.

Should the last parts from a mold be cheaper?

Price should be based on conforming delivered parts, not their shot number. Late-life parts must meet the same agreed requirements unless the customer explicitly approves a different grade.

Can a silicone mold be repaired?

Some noncritical tears, vents or support features can be repaired. The repaired mold should produce a new approval sample because surface, dimensions or closure may change.

How are parts from different molds kept consistent?

Use the same controlled master or approved duplicate, consistent silicone and resin processes, mold identification, color formulation and cross-mold dimensional and cosmetic samples.

Is a multi-cavity silicone mold better?

It can increase output, especially for small parts, but it also adds fill balance, support, demolding and cavity-correlation risks. The best layout depends on geometry and batch requirements.

When should I change from vacuum casting to injection molding?

Compare injection molding when required quantity, repeat demand, material certification or consistency makes repeated silicone tools less economical. The crossover depends on part size, tooling complexity, resin and quality requirements.

Request a Vacuum Casting Batch Review

Aluprototype provides vacuum casting services for rigid, flexible, colored and transparent polyurethane prototypes and low-volume parts. For a broader process and material overview, see our Polyurethane Vacuum Casting in China guide.

Send the controlled CAD model, drawing, delivered quantity, appearance standard, material behavior, critical dimensions, inserts and delivery target through the Aluprototype request-a-quote page. The engineering team can review mold split, master finish, expected acceptable yield, mold count, inspection and the most economical production route before work begins.