Blog de tecnologia

Are the Colored Specks on Your Silicone Roller Really Dirty Compound? 12,000 pcs shipped. 315 pcs sampled, a 2.25% reject rate. Three defects, all from the bench. The compound was clean. Leftover material from the previous run stuck to the new parts. The bulge and the shiny marks came from handling too. The customer sent […]

Why Does a Waterproof Silicone Gasket Leak Because of One Small Bump? Two rejects in 125 pcs. On a waterproof part, one small bump is a leak waiting to happen. The bump was not a molding fault. The parting line had worn and the plate had lost flatness, so rubber pushed into the gap and […]

Why Does the Silicone Extrusion Process Fail Length Tolerance? A complaint came in: the strips were out of tolerance. The machine was fine. The problem sat at the cutting table. Most length failures are not the fault of the silicone extrusion process. They come from four details: cutting timing, cutting force, packaging, and measurement method. […]

Why Do Custom Silicone Rubber Plugs Come Out Small and Soft? A customer returned a batch of custom made silicone plugs. They were 0.37 mm short and too soft. Small size and low hardness are two symptoms of one cause: under-cure. The parts demolded before they set and froze at the wrong size. I did […]

Pre-Order DFM Checklist for Custom Silicone Molds Are you planning to order a custom silicone mold? Stop. Before you pay for tooling, run this DFM (Design for Manufacturability) checklist. This guide is written for buyers, not just engineers. Let’s make sure your custom silicone molding order is right the first time. 1. Material Selection (LSR […]

When silicone products become sticky, the receiving team notices it before anyone opens a drawing: dust clings to the parts, poly bags weld to the surface, and in food-contact or medical programs the batch fails incoming inspection on sight. Silicone products become sticky for five controllable reasons — oil bleeding, an over-softened compound, incomplete curing, […]

A mixing defect is the failure mode where parts of one part number end up inside the carton of another. It surfaced on one of our cable seal programs last month: an assembly line opened a box of 32A1PH seals and found 32A3PH parts mixed through the batch. The two parts differ by a few […]

A silicone mold cost is quoted as a single number, but it is built from five blocks: steel, machining hours, polishing, sampling and engineering. Only two of them scale with part complexity — which is why the cheapest-looking quote is rarely the cheapest project. There are two ways to lower it. The slow way is […]

A silicone mold surface finish is not a cosmetic decision. It is the texture of the steel, and every part produced from that tool will copy it for the life of the program. Specify it after the first samples fail and you pay twice — once to re-polish or re-etch the cavity, and again for […]

Liquid silicone rubber for medical devices is not a material choice — it is a closed process. The compound stays sealed from drum to cavity, the cure is triggered by heat rather than peroxide, and every parameter that affects biocompatibility is either documented or it is not. That closed loop is why medical programs run […]