Vios Technology Company Limited
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Product Specification
This two-shot injection mold (also known as two-color mold, 2K mold, overmolding tooling, bi-injection mold, or double-color mold) is engineered for producing multi-material, multi-color plastic parts in a single molding cycle. Designed with a precision rotary platen interface and independent cooling circuits for both first and second shots, it delivers strong interlayer bonding, sharp color boundaries, and consistent dimensional accuracy — ideal for automotive interior components, consumer electronics, power tools, and cosmetic packaging.
The mold is precision-machined from premium P20 / H13 / S136 / 2316 / NAK80 tool steel (customer-selectable based on production volume and resin type), with cavity and core inserts hardened to 48–56 HRC for exceptional wear resistance and polished surface quality. The mold base features a natural steel finish, guided by large-diameter guide pillars and self-lubricating bronze bushings. Critical sealing surfaces and shut-offs are precision-ground to ensure flash-free overmolding.
Key Performance
· Two-shot / overmolding capability — integrates hard substrate and soft elastomer (or two colors) in one cycle
· Rotary platen / core-back compatible — works with standard two-shot injection machines
· Independent dual cooling circuits — optimized cooling for both first and second shot materials
· Cavity number: 1+1 or 2 cavities (customizable)
· Cycle time: 30–60 seconds (depending on part size, wall thickness & resin combination)
· Tolerance: ±0.02 mm on critical fitting and bonding surfaces
· Mold life: 500,000 – 1,000,000+ shots with proper maintenance
· Surface finish: SPI A-2 / A-3 / texture / VDI grain (customer-specified)
Working Principle
In the first shot, a rigid substrate material (PC / ABS / PC+ABS / PP / PA) is injected into cavity A. The mold then opens and the rotary platen rotates 180° (or the core-back mechanism shifts), transferring the first-shot part to cavity B. In the second shot, a softer elastomer (TPE / TPU / silicone) or a differently colored resin is overmolded onto the substrate, creating a permanent chemical and mechanical bond. The finished two-material part is then ejected — eliminating secondary assembly and improving part integrity.
|
Industry |
Typical Part |
First Shot (Hard) |
Second Shot (Soft/Color) |
|
Automotive |
Door handle, interior trim, air vent grille, armrest, button panel |
PC+ABS / ABS / PA |
TPE / TPU (soft touch) |
|
Consumer Electronics |
Phone case, remote control, device housing |
PC / ABS |
TPE / TPU (grip & seal) |
|
Power Tools |
Drill handle, saw grip, housing overlay |
PA / PP |
TPE (anti-slip grip) |
|
Cosmetics |
Compact case, lipstick tube, cap with seal |
ABS / PMMA |
TPE / second color |
|
Medical |
Device housing, grip, sealing component |
PC / PA |
TPE / silicone (seal) |
|
Parameter |
Specification |
|
Mold Type |
Two-Shot / Overmolding (2K) |
|
Cavity Number |
1+1 / 2 (customizable) |
|
Mold Steel |
P20 / H13 / S136 / 2316 / NAK80 |
|
Hardness |
48–56 HRC (cavity & core) |
|
Machine Compatibility |
Rotary platen two-shot machine / core-back |
|
First Shot Resin |
PC / ABS / PC+ABS / PP / PA |
|
Second Shot Resin |
TPE / TPU / second-color resin |
|
Cooling |
Independent circuits for both shots |
|
Ejection |
Ejector pin / stripper plate / air blow |
|
Cycle Time |
30–60 s |
|
Mold Life |
500K – 1M+ shots |
|
Tolerance |
±0.02 mm |
|
Surface Finish |
SPI A-2 / A-3 / VDI texture / custom grain |
|
Approx. Size |
700 × 500 × 450 mm |
|
Approx. Weight |
800 – 1,200 kg |
|
Color |
Natural steel finish |
|
Lead Time |
45 – 60 days |
The two-shot overmolding design eliminates secondary assembly and adhesive bonding, reducing production cost and improving part durability. Precision-machined shut-offs and balanced dual cooling ensure clean color boundaries and strong interlayer adhesion, while hardened tool steel guarantees long-term stability for high-volume automotive and consumer product manufacturing — a reliable solution for multi-material part producers seeking integrated molding and consistent quality.
Company Details
Business Type:
Manufacturer
Year Established:
1999
Employee Number:
230~250
Ecer Certification：
Verified Supplier
We are a one-stop manufacturer providing comprehensive solutions for prototypes, tools, machining parts, injection molding, and surface treatment. Established in 1999 and located in Dongguan, we operate two dedicated production facilities: Plant 1, with 230 employees, focuses on mold making and mold... We are a one-stop manufacturer providing comprehensive solutions for prototypes, tools, machining parts, injection molding, and surface treatment. Established in 1999 and located in Dongguan, we operate two dedicated production facilities: Plant 1, with 230 employees, focuses on mold making and mold...
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