Connector Overmolding Machine
Features
Each connector overmolding machine from Kinki Taiwan combines vertical clamping precision and customizable injection options to ensure accurate molding and secure insert positioning. The following key features highlight why Kinki’s vertical injection machines are the preferred choice for connector and plug manufacturing.
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Vertical Clamping & Injection Stability
– Keeps connectors and wires firmly in position during overmolding, preventing misalignment or wire pulling. -
Tie-Bar-Less Access (KC Series)
– Three-sided open space design enables faster mold setup and easier access for connector molds. -
Compact & Precise (KT Series)
– Dual-cylinder vertical injection system with straight-pressure clamping ensures stability and precision for small to medium connectors. -
High-Performance Capacity (KR Series)
– Vertical clamping and horizontal injection design suitable for larger connector and plug inserts. -
Energy-Efficient Option (KET Series)
– All-electric vertical machines deliver clean operation, lower energy use, and reduced environmental impact. -
Custom Engineering
– Special-purpose builds available for multi-cavity connector molds, intricate plug geometries, or integrated cable and plug assemblies.
Applications
Charging guns for electric vehicles, car sunroofs and triangular windows, leak-proof side strips, motor stators. More automotive component manufacturing by injection molding.
Polarized lenses for sunglasses, motorcycle goggles, backlight panels, light guide panels, LED lamp wire frames
Since medical equipment is produced in a clean room, it is recommended that all motors have no pollution.
Invasive infusion tubes, blood collection needles, dialysis catheters
Mobile phone and computer charging network routes, stepping motors and fan blades, precision electronic parts, sheaths and slings
Overmolded Product Applications and Benefits
Kinki’s connector overmolding machines are widely used in plug and connector production across various industrial and consumer applications, ensuring stable quality and safety in every product.
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Power Cord & AC Plug Overmolding
– Ensures strong bonding and electrical safety. -
Connector + Cable Assemblies
– Reliable strain relief and insulation for power and data transfer. -
Electronic & Consumer Connectors
– Ideal for USB, HDMI, and audio plug overmolding. -
Industrial Connectors
– Durable molded connectors for outdoor and heavy-duty environments.
End Products
AC Plug Overmolding Example – High durability and electrical insulation
Power Connector Assembly – Safe, stable, and reliable structure
USB and HDMI Plug Overmolding – Compact and precise finishing
Industrial Connector Overmolding – Waterproof and heat-resistant design
Connector Overmolding Machines | Precision Vertical Injection Solutions for Connectors & Plugs
Kinki Taiwan’s connector overmolding machines feature precision clamping, efficient injection control, and flexible configurations.Designed for plug and connector insert molding, they deliver exceptional accuracy, repeatability, and long-term reliability. Key advantages include:
- Optimized for plug and connector overmolding
- Open tie-bar-less design for easy mold changes
- Compact layouts for small-to-medium connector production
- All-electric precision for clean and efficient operation
Connector Overmolding Machine Lineup
Kinki Taiwan Machinery provides a full lineup of vertical injection molding machines for connector and plug overmolding:
| Series | Layout & Design | Best for Connector Overmolding | Key Features |
|---|---|---|---|
| KR Series | Vertical clamping + horizontal injection | Large insert and connector parts | High injection volume, long stroke capability |
| KC Series | Vertical clamping + horizontal injection, tie-bar-less, three-sided open design | Plug and connector molds requiring fast mold changes | Three-sided open access |
| KT Series | Vertical clamping + vertical injection, dual-cylinder system | Compact connector molding, small-to-medium parts | Direct-pressure clamping, dual-cylinder injection |
| KET Series | All-electric vertical injection | Energy-efficient connector production | Precise, clean, reduced energy use |
| Special Purpose Machines | Customized vertical platforms designed for unique connector shapes, multi-insert molds, or hybrid plug configurations. | Specialized connector or plug overmolding | Tailored solutions for special plug configurations, multi-insert molds, or hybrid connector designs. |
Applications & Industries
Connector overmolding machines play a key role in producing safe, durable connectors across industries including:
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Appliance and Power Tools
– Plug and power cord overmolding for high-voltage stability. -
Electronics & Communication
– USB, HDMI, and charging connectors. -
Industrial Equipment
– Heavy-duty waterproof connectors and extension cables. -
Automotive & EV
– Molded connectors and plug housings for in-vehicle systems.
For in-depth molding insights, read our technical article:
Connector Overmolding: How Vertical Injection Ensures Reliable Plug Performance
Frequently Asked Questions
Get quick answers to common questions about performance, materials, and automation when working with Kinki’s connector overmolding systems. Below are some frequently asked questions from manufacturers and engineers working with Kinki’s connector overmolding systems.
Q: What mold setups are typical for connector overmolding?
Connector molds commonly use 6–8 cavities for efficient mass production.
Q: What tonnage range is recommended for plug molding?
45-ton and 85-ton vertical machines are most frequently used.
Q: Why are vertical machines preferred for connector molding?
Vertical injection provides stable clamping and reduces wire pulling compared to rotary or sliding types.
Q: Can Kinki customize connector overmolding machines?
Yes. Special Purpose Machines can be built for custom plug shapes, multiple inserts, or automation integration.
Q: Is there an energy-saving option available?
Yes. The KET Series offers all-electric vertical injection for lower energy use and cleaner operation.
Q: What materials are commonly used for connector overmolding?
Common materials include TPU, PVC, and TPE—each offering flexibility, insulation, and durability for different plug designs.
If you don’t see your question here, contact our technical team for expert assistance.
How Does Connector Overmolding Work?
Connector overmolding enhances the strength, insulation, and aesthetics of electrical connections. The connector and cable assembly are placed into a mold cavity, where molten PVC, TPU, or TPE is injected to form a protective and insulating layer.
- Strong mechanical bonding between wire and connector
- Electrical insulation and waterproof protection
- Strain relief to prevent wire damage
- Improved appearance and brand consistency
Why Choose Kinki Machinery?
With over 40 years of expertise in vertical injection molding, Kinki Machinery delivers machines that combine precision, safety, and long-term reliability for plug and connector production. Our machines are built for high repeatability, compact design, and user-friendly maintenance.
Why Kinki?
- Proven results in plug and connector overmolding applications
- Custom machine design for OEM/ODM projects
- Comprehensive technical support from mold design to automation setup
