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Direct Factory Injection Mold Overmold For Rsoft Plastic Part 1+1 Cavity

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Benefit Why It Matters
Faster Time-to-Market Eliminates supplier delays and ensures a seamless transition from design to production
Lower Costs Offers bulk material discounts, reduces rework, and eliminates middleman costs
Better Quality Control Maintains consistent standards throughout all stages of the process
Risk Reduction Provides early Design for Manufacturability (DFM) feedback, preventing costly mold revisions
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  • YIXUN mold

  • 8480419090

2K Mold: Advanced Dual-Material Injection Molding Solution
In the field of modern plastic manufacturing, 2K Mold (also known as 2C Mold) stands out as a revolutionary technology that redefines product performance, aesthetics, and functionality. By injecting two different plastic materials into the same mold in sequence, it enables the production of integrated plastic parts with dual-material properties or color combinations—meeting the increasingly complex demands of industries worldwide.
1. Core Material Combinations
The versatility of 2K Mold lies in its flexible material pairing, which balances functionality, durability, and user experience. Two primary combination types dominate industrial applications:
▶ Hard + Soft Plastic Combination
This pairing integrates structural stability (hard plastic) with tactile comfort or sealing performance (soft plastic), ensuring strong bonding between the two materials through precise material selection and mold design.
Typical Applications:
  • Mobile phone buttons (hard PC/ABS shell + soft TPE/TPU keycap)

  • Infant bottle nipples (hard PP bottle body + soft silicone nipple)

  • Power tool handles (hard nylon structural part + soft TPE anti-slip grip)

▶ Same-Material, Different-Color Combination
For products requiring vivid color differentiation or brand-specific visual identity, 2K Mold uses the same base material with different colorants to achieve seamless color integration—avoiding the need for secondary assembly or painting.
Typical Applications:
  • Automotive taillights (transparent PC + colored PC lens)

  • Household appliance control panels (white ABS base + gray ABS buttons)

  • Children’s toys (multi-color PP components for safety and attractiveness)

2. Innovative Mold Structures
2K Mold’s efficiency and precision rely on two mature structural designs, each optimized for different production scenarios and part complexities:
▶ Semi-Finished Product Shifting
This structure features at least two even-numbered cavities (e.g., 2, 4, 6 cavities). The first material is injected into half of the cavities to form semi-finished parts; then, a mechanical shifting system or robotic arm transfers these semi-finished parts to the other half of the cavities for the second material injection.
Working Principle Example:
For a coasters with "hard white + soft blue" material combination:
  1. Hard plastic (e.g., PP) is first injected into the front cavities to form the coaster blank, with pre-designed grooves for the soft material.

  1. After the mold opens, the semi-finished blanks are automatically shifted to the rear cavities.

  1. Soft plastic (e.g., TPE) is injected into the grooves, forming a fully integrated coaster in one cycle.

Advantage: Suitable for linear or symmetric part designs, ensuring high production efficiency for small to medium-sized parts.
▶ Rotational Molding
This design uses an injection molding machine with a rotating worktable or integrates a rotational mechanism directly into the mold. Instead of shifting semi-finished parts, the movable mold half rotates by a fixed angle (usually 90° or 180°) to align with the second injection unit.
Working Principle Example:
For a lid with a hard inner core and soft outer seal:
  1. The fixed mold plate remains stationary, while the movable mold plate is equipped with a rotational template.

  1. The first material (hard plastic, e.g., ABS) is injected into the initial cavity to form the lid’s inner core.

  1. The movable mold rotates 180°, aligning the semi-finished core with the second cavity.

  1. The second material (soft plastic, e.g., TPU) is injected to form the outer seal, completing the lid in one continuous process.

Advantage: Eliminates part transfer errors, ideal for complex, asymmetrical parts requiring high precision (e.g., automotive components).


3. Wide-Ranging Industry Applications

2K Mold’s ability to combine performance and aesthetics makes it a staple in high-demand industries, driving innovation in product design:

Industry
Typical Products
Key Benefits
Automotive
Dashboard panels, steering wheels, door handles, sensor housings
Enhances comfort (soft-touch surfaces), improves durability, and reduces assembly steps
Electronics
Smartphone casings, tablet borders, earphone shells, charger plugs
Achieves multi-color designs, improves grip, and ensures dust/water resistance
Medical & Dental
Dental prosthetic bases, medical device handles, syringe components
Uses biocompatible materials (e.g., medical-grade TPE + PP), ensures sterility and user safety
Food & Beverage
Water bottle caps, food container lids, kitchen utensil grips
Non-toxic material combinations, leak-proof sealing, and easy cleaning
Household Appliances
Washing machine control knobs, refrigerator door gaskets, vacuum cleaner handles
Balances structural strength and user comfort, enhances product longevity
4. Why Choose Our 2K Mold Solutions?
  • Superior Bonding Strength: Our mold design and material matching technology ensure >95% bonding rate between two materials, avoiding delamination even under long-term use.

  • High Production Efficiency: Equipped with advanced shifting/rotational mechanisms, our 2K Molds reduce cycle time by 20-30% compared to traditional multi-step processes.

  • Customization Capability: We offer tailored solutions for material selection, color matching, and cavity design—adapting to your unique product requirements (from small components to large automotive parts).

  • Quality Assurance: All molds undergo strict testing (e.g., pressure resistance, temperature stability) and comply with international standards (ISO 9001, IATF 16949 for automotive).


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