CNC Master to Silicone Pour: How a Cavity Tool Is Actually Built

What you are buying (cavity tool, not finished goods)

You are not buying 500 packed gummies. You are buying trays that hold cavities. If a quote talks like a finished-goods OEM at MOQ 300-1000, you are on the wrong page.

RUUIPON has made custom silicone molds in Shenzhen since 2018 for brands and makers. MOQ 20 trays per design. Prototype commonly 3-7 business days after CAD lock. About 24 hours on a complete RFQ. Drawing deposit about $50 USD when we must model cavities.

Sister-brand plant copy (depositor, starch mogul, steel-first) is a different lane. We will not paste that outline here with a logo swap.

Manufacturer hub · Capabilities

Build chain from RFQ to a sheet you can restock

Skip a gate and you pay in scrap or a CAD reopen. We would rather delay a lock than ship a hooked bail as a one-piece tray.

1. 01

   Measurable RFQ

   mm units, pour, peak C, OD or grams, food vs craft. The 24h clock does not start on a marble flat-lay.

2. 02

   DFM screenshot

   Undercuts, island meat, split vs one-piece. You agree before CAD lock.

3. 03

   CAD lock

   This starts the 3-7 day prototype band. Not the first WhatsApp hello.

4. 04

   Master

   We cut a master that matches the locked millimetres, with shrink compensation when we have a solid (~0.1% typical for platinum).

5. 05

   Platinum pour + vacuum

   Production sheets are not tin hobby blocks. Bubbles become SKU defects on clear resin and shallow logos.

6. 06

   Your pour, then yes/no

   Test cast in your chemistry. Production MOQ 20 after you approve, not after a hero photo.

File rules that keep the master from being 25.4 times too big

Export from CAD in millimetres. Put units in the filename. Do not scale in a slicer and send us the print file as if it were the master.

mm not inches

Master work and shrink - numbers, not adjectives

Shrink is compensated in CAD when we have a solid. Typical platinum note is about 0.1%. That is not a promise your chocolate will hit +/- 0.05 g if your temper cannot hold it.

Draft 1-3 degrees on vertical walls when geometry allows. Zero-draft stamps pack dough or lock wax. We will mark it before lock.

If you send a 3D-printed master, we still caliper. PLA that moves in a hot car is not a millimetre source of truth.

CAD from sample

Platinum pour and vacuum - why tin kits fail on restock

Tin hobby kits hide tear until order 40. Production sheets that see epoxy exotherm or sticky pectin need platinum and degas so a pit is not your logo.

We do not lock a marketing cycle-life number. We lock Shore after you name chemistry, wall mm, and whether the sheet must stack in a freezer or a resin rack.

Vacuum platinum trays

Pour families we quote (not a steel materials encyclopedia)

CNC buyers pick alloys. Our analog is pour family plus peak C. A Shore number with no pour is ignored.

Failure modes we try to kill in CAD, not on restock

If the listing photo cannot lose 0.3-0.5 mm of undercut, write that. Otherwise we will recommend flatten and you will fight us after the sample.

DFM review

Catalog tray vs our sheet vs steel

We do not mud-sling storefronts. We do not pretend we are a steel shop. Pick the URL that matches the job.

Storefront vs factory

What we measure on the sample sheet (not a CMM theater)

We caliper OD, depth, and island width against the locked millimetres. We look at flash, pits, and whether a logo that was 0.8 mm in CAD still reads after shrink. We do not publish a fake CMM report with 12 decimals on a floppy tray.

If your SKU needs grams, you weigh your pour. We will not sign a nutrition label. We will say if cavity-to-cavity look is even enough to continue.

A flash photo of the empty tray is not QC. A photo of your pour, flash on, islands in plane, is the reject list. See the test-cast service if you want that gate named as its own URL.

Test cast QC

When CAD reopens (and when it should not)

CAD lock is the start of the 3-7 day prototype band. It is also the line after which a new undercut, a units miss, or a 2 mm logo deepen is a reopen - not a free WhatsApp tweak.

Colorway-only, same millimetres: usually same cavity. New hook on a bail, new island on a stamp, new split: reopen. If ads are already live on a listing OD, say so. We would rather delay lock than fight a live inch title.

What changes after lock

Lead time: 24h quote vs 3-7 days after lock

About 24 hours is a complete RFQ: mm, pour, peak C, food vs craft, OD or grams. A marble flat-lay does not start that clock.

Prototype commonly 3-7 business days after CAD lock - not after the first hello. Production MOQ 20 is after you approve the test cast, not after we like the render.

Drawing deposit about $50 USD when we must model cavities from a sketch or a sample. If you already send a clean STEP in mm, that line may not apply. We will say so on the quote.

What a silicone tray cannot do even if CNC is perfect

Zero-draft 8 mm letter islands will still tear. A hooked jewelry bail will still lock in a one-piece cookie-tray pull. Steel or a split is a different job - we will name it, we will not fake it.

We will not hold mill-style +/- 0.02 mm on a Shore A 20 sheet. Ask for a practical millimetre band. If your buyer is a plant with a depositor nest, that is not this URL.

Food-contact documentation is a quoting path, not a pour step. Do not mix FDA/LFGB language onto resin or candle tools.

Food-contact quoting · Silicone vs steel

What this service page is not

Not the generic /services/ overview. Not a blog. Not a 500-link header. Not WYD plant copy. Not a promise of 1-day CNC parts - we are not RapidDirect's CNC mill count, and we will not fake 700 machines.

We will not invent ISO theatre or headcount. Shenzhen since 2018, MOQ 20, prototype 3-7 after lock, quote ~24h on complete files - those stay consistent.

RFQ pack for this chain

Units mm. Pour + peak C. FOOD-CONTACT or CRAFT. OD or grams. Undercut keep-or-flatten. Cavity count or weekly pieces. Destination if docs matter. WhatsApp +86 135 3006 2969 or the form.

Contact · Quote form · Process catalog