CNC Tolerances: RTV Masters vs Steel LSR Tools
The mill can hold a hundredth on aluminum or H13. RTV copies the master, not the press. Do not paste a prototype mill block onto a poured jacket or a hot
Read article -Custom silicone development · RTV mold MOQ from 20 · DFM & prototype support
Explore practical silicone mold guides from RUUIPON, covering design, release, materials and production planning. Start with the problem you need to solve, then open the relevant product page when you are ready to discuss a quotation. CAD, drawings, samples and measured reference photos can all help define the project.
A broad DFM guide covering release, undercuts, splits, detail, multi-cavity layout, material selection and prototype validation.
The information that helps a supplier identify the correct mold structure, process, quantity and documentation requirements.
Understand when a flexible casting mold, compression tool or LSR tool fits the product.
Understand what food-contact documentation means and what to request for the destination market.
Use this cluster for one-piece vs two-part molds, undercuts and split molds, registration keys, wall thickness and support, edge radius, logo/text detail, tolerance and shrinkage, and DFM review.
One-piece vs two-part · Undercuts and split molds · DFM review
Use this cluster for gummy mold design, gummy size and cavity volume, chocolate molds, baking, ice and food-contact documents.
Use this cluster for platinum vs tin cure, vacuum degassing, cure time, RTV vs HCR/HTV vs LSR, and overmolding.
Use this cluster for RFQ preparation, low MOQ, lead time, custom vs off-the-shelf, factory sourcing, prototype to production, and ownership/reorder.
RFQ guide · Low MOQ · Custom vs off-the-shelf · Manufacturer
Use this cluster for common defects, tearing, resin bubbles, storage/warping, lifespan and cleaning.
Common defects · Resin bubbles · Storage and warping · Mold lifespan
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The mill can hold a hundredth on aluminum or H13. RTV copies the master, not the press. Do not paste a prototype mill block onto a poured jacket or a hot
Read article -Silicone will not hold a machine thread like nylon. Lock a knurled insert in rubber, pin the helix, and use RTV when you only need a room-temp fixture.
Read article -LSR cycle time is heat into the rubber, not plastic-style cooling. RTV analog is pour exotherm and jacket thermal mass. Do not buy DMLS channels for a
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Deep-draw LSR boots vacuum-lock on the core. RTV gloves invert on purpose. Peel with draft and a jacket — a shop hose splits 10A rubber.
Read article -+1° draft per 0.02 mm of texture depth is a shop thumb rule. On RTV the extra degree often protects the jacket, not a rigid LSR part leaving steel.
Read article -A 3-part split is a parting-network, not a midplane. Pick faces that unhook undercuts, key the pieces, and keep the pour from fighting the split.
Read article -Scan a damaged master as a clue, not as CAD. Clean the mesh, rebuild solids, restore draft, and apply the next process shrink. STL-to-mill copies the
Read article -ISO 13485 is a medical QMS; ISO 9001 is general. Neither is a cleanroom, a gum cert, or a substitute for watching the pour and the records.
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RTV jackets and LSR steel are different factories. ROI is labor, scrap, chemistry, and freeze-risk. Stay on recast RTV until the object is a molded part.
Read article -A blanket PO is a price-and-qty envelope. Kanban is a pull signal. RTV jackets still have kit lots and recast clocks. Write those into the pull.
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