Two-shot / 2K
Both materials should be formed in one coordinated molding sequence.
Confirm: Material compatibility, first-shot retention, transfer sequence, gates, shutoffs, and interface testing.
Two-Shot (2K) Injection Molding
LongTeam specializes in multi-material components made through two-shot (2K) molding. Use the process when compatible materials or colors need to form one coordinated part, with the interface, tooling sequence, expected demand, and approval method reviewed before release.
Program inputs
- Process
- Two-shot / 2K injection molding
- Engineering path
- Drawing review → DFM → tooling → trials → production
- Press range
- 80–850 tonnes; final press selection depends on the part and tool
- Location
- Tainan, Taiwan
- Company
- LongTeam Industrial Co., Ltd., founded in 1989
Choose the production route
Two materials do not automatically require a two-shot mold.
The right route depends on the interface, material pair, annual demand, handling risk, and evidence required to approve the finished part.
Read the two-shot process and design guideOvermolding
A separately molded substrate can be transferred into a second tool for the added material.
Confirm: Substrate condition, placement, bond or interlock, flash limits, and transfer controls.
Insert molding
Metal hardware or another prepared component must be positioned and encapsulated during molding.
Confirm: Insert tolerances, orientation, support, detection, heat exposure, and pull-out or functional tests.
Combine functions in one molded component
Multi-material molding can combine a rigid structure with a soft or sealing surface, distinguish controls with color, or create a defined interface without treating separate assembly as the default. Two-shot molding should be compared with insert molding, overmolding, and separate assembly using the same functional and production assumptions.
- Define the function of each material or color
- Confirm exact grade-level compatibility
- Compare 2K tooling with alternative assembly routes
Resolve the material interface before tooling
The interface may rely on chemical adhesion, mechanical interlock, or both. The drawing and DFM review should define shutoffs, first-shot support, second-shot flow, flash limits, appearance, and the functional test used for approval.
Connect the mold sequence to production
Review how the first shot is formed and retained, how the mold rotates or transfers, where both shots gate and vent, and how the completed part is ejected and inspected. Machine and tool selection follow the actual projected area, shot requirements, and geometry.
Define qualification evidence
Agree on material records, dimensional and cosmetic criteria, interface tests, cavity identification, process controls, samples, and change notification for the specific program.
Engineering passport
The same engineering path, adapted to your program.
See how analysis, tooling, and process learning stay connected from review through production. Findings and acceptance criteria are defined for each program.
Review geometry, material, gates, ejection, and tooling risks before steel is cut.
LongTeam injection mold tooling, built to carry engineering decisions into production.
Use dimensional and process data to identify variation and guide engineering decisions.
Related insights
FAQ
Frequently asked questions
Related capabilities and program guidance
Prepare for engineering review
Prepare the right information for an engineering review.
Share the drawing, material, expected volume, and critical requirements so LongTeam can clarify the project and quotation scope.