Tool type and molding method decide precision, yield and consistency. We match the tool and process to product structure, application, performance requirements and appearance standard, and support single-colour, multi-colour and combined-bonding molding for silicone over metal, plastic or PCBA.
The difference between silicone products is often not whether they can be made, but which route is used. For the same structure, compression molding and liquid injection differ in precision, flash, consistency and unit cost. Electronic composite parts add one more constraint: the insert must not shift and must not be crushed during molding.
We do not run a single fixed production mode. Structure complexity and insert type come first, then operating environment, performance and appearance standard, and then the tool type, molding method and downstream finishing — only then the volume arrangement. Controlling precision from the tool outwards costs less than repeated correction in production. For parts with a frozen structure and higher volume, cycle rate and unit cost also depend on machine retrofit and automation, which is covered in the equipment and capacity section of the capability page.
Molding routes
Covering solid silicone, liquid silicone and special compounds for precision small parts, irregular structures, sealing parts, electronic composites and thin-wall parts. Compression, liquid injection, potting and blow molding are the main mold-based routes; screen printing and spray coating build surface function; dispensing, extrusion and calendering cover local functional layers, constant sections and sheet or roll stock.
The classic, most widely used route: pre-cut solid silicone compound is placed in the cavity and cured under high temperature and pressure.
Liquid silicone is injected under pressure into a closed mold on dedicated LSR equipment and cured rapidly.
Protective potting for electronic components, modules and boards against water, moisture, electrical leakage and vibration: liquid silicone is mixed to ratio and dispensed precisely into the mold or gap, then cured at room temperature or with heat.
Developed for hollow silicone products: air pressure presses melted compound against the mold wall to cure in shape.
For thin surface layers, graphics and anti-slip coatings: silicone ink or a special compound is printed through a screen and oven cured into an integrated thin structure.
Using the substrate as the carrier, automated spraying distributes a functional silicone compound evenly over the surface, curing into a dense functional layer.
A dispenser lays liquid silicone along a programmed path; viscosity and surface tension control the layer thickness, and it cures at room temperature or with heat. No mold is needed — a patterned fixture positions the part.
Solid silicone is pushed continuously through a die and then cured in line in a hot-air or salt-bath tunnel, producing constant-section strips, tubes and cords cut to length.
Compound is pressed continuously through a multi-roll calender into sheet or roll stock of even thickness, then cured; it can be laminated with a reinforcement layer or produced as foam sheet.
Tool systems
The tool is the core of precision. We build tools to the molding route, the silicone compound and the product structure instead of forcing a general-purpose tool onto a new structure.
For solid silicone compression molding, machined from quality tool steel with high cavity precision, resistant to high temperature and pressure and slow to distort.
For LSR injection, using high-precision mirror tool steel with accurate temperature control, runner and venting systems.
Designed for electronic potting: accurate opening and closing, good sealing, no compound leakage or edge overflow.
For irregular, large or low-volume custom silicone products, with short tool lead time and good value.
Molding options
Complex silicone composites are rarely produced by one molding route; they are split by structure and combined.
One mold, one colour family, one cure: simple, stable and fast in volume.
Suits standard solid-colour accessories, basic overmolded parts and standard seals.
Multi-station molds, staged curing or synchronized injection bring two or more colours into one part without secondary assembly or gluing.
Clear colour boundaries, no colour bleed and no peeling; used for coloured keys, marked silicone parts and decorative electronic accessories.
For silicone assemblies molded by different routes, or composite assembly of silicone with metal, plastic or electronic components, using environmentally friendly bonding, high-temperature lamination and nano bonding to form one unit.
High bond strength, resistant to pulling and ageing, no cracking; suited to non-standard silicone composite products.
Our approach
Most silicone factories work with a single molding route and general-purpose tooling on standard subcontract work. We match tool and process in one pass against structural complexity, operating environment, performance parameters, volume and appearance standard.
Fix the tool type and cavity plan from the molding route, compound and structure, and design the insert locating structure at the same time.
Choose compression, injection, potting or blow molding against volume, precision and appearance requirements.
Decide the single-colour, multi-colour or combined-bonding combination and fix the compound and hardness requirements.
Surface finishing and post-curing combined as required, with inspection and volume delivery arranged accordingly.
On electronic composites — silicone over metal, plastic or PCBA — matching process and tool precisely removes delamination, bond loss, deformation, cracking and short precision at source.
FAQ
It depends on structure, volume and appearance. Solid silicone compression molding covers most standard silicone parts and overmolded composites with stable quality and controllable cost; liquid injection suits high-precision, high-cleanliness, thin-wall complex structures and medical or food-grade products, with fast cycles, good consistency and no flash.
Liquid silicone molds use high-precision mirror tool steel with temperature control, runner and venting systems; parts are flash-free with precision up to ±0.05 mm. Tolerances for a specific part are confirmed against its structure and dimension directions.
Mainly protection of electronic components, modules and boards against water, moisture, electrical leakage and vibration. Liquid silicone is mixed to ratio and dispensed by automated equipment into the mold or gaps, filling completely with no dead zones and fully enclosing PCBA, circuits and small precision hardware.
Multi-colour one-piece molding uses multi-station molds, staged curing or synchronized injection with no secondary assembly or gluing, giving clear colour boundaries, no colour bleed and no peeling. Bonded assembly belongs to combined-bonding molding and is used to join components of different materials or different molding routes.
It is for hollow products: air pressure presses melted silicone against the mold wall, giving even wall thickness, good toughness and no seams. It is used for silicone hoses, hollow protective sleeves, inflatable silicone parts and thin-wall hollow protection that other routes struggle to make.
Tool structure and cost are stated in the quotation, and ownership and cost responsibility are confirmed in writing per project. The sampling stage freezes the structure and process window as the basis for volume production.
Send the part structure, insert type, operating environment and quantity range. We confirm tooling and molding method first, then discuss sampling and volume.