Two Shot Injection Molding Supplier In China
Maximize Your Savings with a Trusted Two-Shot Injection Molding Company
- Trusted
- Experienced
- Professional
High-Precision 2 Shot Injection Molding Services
Are you struggling with material bonding, slow cycle times, or high defect rates in multi shot injection molding? Stebro Mold is a professioal 2K molding supplier in China, we specialize in rotary platen two shot injection molding. It can ensure seamless multi-material and multi-color part production with adhesion, efficiency, and cost savings.
Our services include:
- 2D & 3D product design and optimization
- The material selection
- Rapid prototyping services
- Cost-effective two shot mold solution
- Mold Flow Analysis to optimize the mold design
- In-house 2K mold manufacturing, tooling transfer, mold change, and maintenance
- 2K mold trial
- Pre-production runs and mass production
Part Assembly
- Automotive Components Manufacturing – Soft-touch buttons, injection molded dashboards, steering wheels, grips and switches
- Medical Devices Manufacturing – Multi-material syringes, ergonomic grips, housings
- Consumer Electronics – Dual-color buttons, protective casings
- Industrial & Power Tools – Dual-material grips, two-material enclosures, Multi-color cylinder covers
At Stebro Mold, your project’s success is our primary goal. We’re committed to providing you with two shot injection molding solutions that ensure your parts are crafted to perfection right from the start, within your budget, and delivered on time. Let us be your partner in achieving excellence in 2K injection molding process.
Double Shot Injection Molding
Why Stebro Mold for 2K Injection Molding Supplier
- Free 2K Plastic Part Design Assistance
- Mold design optimize with Moldflow to improve the surface and reduce cost
- In-house 2K Mold Manufacturing
- Mold Life Guarantee, Free Mold Maintenance
- Affordable Price, No Hidden Charges
- Quality Control In Manufacturing, Consistent Quality
- On Time Delivery
- 24-Hour Quote Responses With DFM Feedback
- Engel 2K Injection Molding Machine
Table of Contents
What is 2 Shot Molding?
Two shot injection moulding, also known as 2K molding, double-shot molding, multi-color molding, or double injection molding. It is a specialized manufacturing process involving injecting two different materials into a single mold.
Unlike standard injection molding, which uses a single material, two-shot molding allows manufacturers to combine different materials with different melt temperatures into one finished product.
First, the initial material is injected into the mold, creating the first layer or core component. Then, the mold rotates or moves to a second position, where the second material is injected around or onto the first material. The result is a single, integrated component with enhanced aesthetics, strength, or functionality—achieved efficiently within one molding cycle.
Two-shot Molding Advantages
- Improve the touch feel
- Stronger Bonding
- Increased Design Flexibility
- High precision, high quality, and faster production cycles
- Reduce assembly time and cost
Two-shot Molding Disadvantages
- The combination of 2 plastic materials must be good
- 2K mold and molding costs more but saves on assembly costs
Main considerations in designing 2K Plastic molding product
- Material compatibility determines the strength of adhesion between substrate and overmold. Some materials bond chemically such as PP+TPE or PA6+TPE
- If chemical adhension is limited, then use mechanical interlocks for improved bonding.
- The part geometry must accommodate two distinct materials or colors. Complex geometries might require rotary platen or sliding table solutions.
- Consistent Wall Thickness & Enough draft angles
- Minimize complexity to reduce costs
Key considerations in 2K Mold Design
- Shrinkage & Thermal compatibility for both materials
- 2K molding machine specification
- Check part geometry such as wall thickness and draft angle
- Number of cavities in the mold
- Parting Lines & Gate Locations
- Cooling, Ejection, and venting system in the mold
- Tolerances & Dimensional Stability
2K Injection Molding Cost
2K plastic component cost=raw material cost + molding cost
There are some ways to lower the cost:
- Reduce the material cost
- Optimize the mold design to shorten the molding cycle
- Increase the cavity number in the mold.
- Working with a full-service two shot injection molder
Two-Shot Molding Machine
- Rotary Platen Two-Shot Injection Molding Machines
- Index Plate (Sliding Table) Two-Shot Injection Molding Machines
- Core-Back Two-Shot Injection Molding Machines
- Transfer Two-Shot Injection Molding Machines
- Multi-Barrel Two-Shot Injection Molding Machines
2K injection Molding Material
In double-shot molding, two different materials are used to create a final product. The materials used can vary depending on the product’s requirements. Common materials used in 2K injection molding include:
Thermoplastics: PC+ABS, ABS, PA, and PC are some of the thermoplastics used in 2K injection molding.
Elastomers: Soft plastics such as TPE, TPV, and TPU are used in two-shot molding to provide elasticity and flexibility to the final product.
The choice of material depends on the desired properties of the final product, such as strength, flexibility, transparency, and heat resistance.