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Insert Molding / 04

Insert Molded Parts

Kataken Seiko performs insert molding, in which stamped metal parts are placed into a mold and resin is molded around them. Because die and mold making, stamping and injection molding are all done in-house, we can manufacture combined metal-and-resin parts from start to finish.

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WHAT IS INSERT MOLDING?

What Are Insert Molded Parts?

Insert molded parts are products in which stamped metal parts are placed inside a mold and molten resin is injected around them, joining metal and resin into a single part.

They combine the strength and electrical conductivity of metal with the light weight and insulating properties of resin in a single part. This is why they are used in fields that demand high functionality, such as automotive, semiconductors and electronic equipment. Unlike conventional injection molding, which molds resin alone, the metal part becomes part of the finished component.

Insert Metal

Insert

Inject Resin

Inject

Cool

Cool

Integrate

Integrate

Parts Arranged in a Strip

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Technology

Technologies Behind Our Insert Molding

Insert molding combines metal parts and resin into a single part. Drawing on our expertise as a die and mold maker, Kataken Seiko molds high-quality insert molded parts.

M-01

Insert Molding

Insert Molding of Stamped Parts

This technique places stamped metal parts inside the mold in advance and molds resin around them to join them into one part. This is the basic process used to produce the metal–plastic parts described on this page.

M-02

Precise Positioning

Precise Positioning

This technique holds metal parts in exactly the right position inside the mold during molding. By controlling their position so they do not shift, we produce insert molded parts of consistent quality.

M-03

Precision Molding

Micro and Precision Molding

This technique molds small, complex insert molded parts with high precision. It handles the fine, high-precision shapes required in the semiconductor and electronic component fields.

M-04

Multi-cavity

Multi-Cavity Molding and Mass Production

This method molds multiple products at once in a single mold for efficient mass production, allowing the same insert molded part to be produced reliably in large volumes.

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Products

Insert Molded Parts by Kataken Seiko

Kataken Seiko combines metal part processing and resin molding to manufacture insert molded parts for fields that demand high functionality. Our main products include the following.
Automotive

Busbars

Busbar

A busbar is a metal conductor that carries electric current. By molding resin onto a metal busbar, we integrate insulation and mounting functions into the part. Busbars are used in electrical components for electric vehicles and other applications.
Semiconductor

IC Packages

IC Package

An IC package protects a semiconductor chip and provides the electrical connection to external circuits. Resin is molded onto a metal lead frame to encapsulate the chip in a single integrated part.
Electrical & Electronic

Memory Housings

Memory Housing

These are exterior housings that protect electronic components such as memory. Metal parts and resin are combined to integrate protective and mounting functions.
Electrical & Electronic

Contact Switches

Contact Switch

These are switch parts with electrical contacts. Resin is molded onto metal contact parts to integrate the switch function into a single part.

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Precision

Micro and Precision Insert Molding

The quality of an insert molded part depends on the precision of the mold, the precision of the metal parts, and the ability to hold the metal parts in exactly the right position. With our advanced expertise as a die and mold maker, Kataken Seiko can handle even complex, high-precision insert molded parts.

The semiconductor and electronic component fields require submicron-level precision. Because Kataken Seiko understands both metal part processing and resin molding, we can take on insert molding projects that demand this level of precision.

* Achievable precision and dimensions vary depending on the product's shape and material. Please contact us for details.

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TECHNOLOGY & SERVICES

Technology & Services

01

  • Precision Die & Mold Manufacturing

02

  • Stamped Parts

03

  • Injection Molded Parts

04

  • Insert Molded Parts

05

  • High-Speed Transfer Systems

06

  • Production System Engineering

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FAQ

FAQ

Can I order everything from stamping the metal parts to insert molding from you?
Yes. Kataken Seiko handles all of it in-house: the design and manufacture of insert molds, the stamping of metal parts, and injection molding. From producing the metal parts to molding the finished insert molded parts, we support you through a single point of contact.
What is insert molding, and how does it differ from conventional injection molding?
Insert molding is a method in which stamped metal parts are placed inside a mold and resin is molded around them, joining metal and resin into a single part. Unlike conventional injection molding, which molds resin alone, it combines the functions of metal and resin in one part.
What fields do you manufacture products for?
We manufacture insert molded parts for a wide range of fields, including automotive (busbars), semiconductors (IC packages), and electrical and electronic applications (memory housings and contact switches).
Do I need to supply the metal parts?
Kataken Seiko also stamps metal parts in-house, so we can handle production starting from the metal parts. Please contact us if you would like us to use parts you supply.
Do you also handle prototypes and low-volume production?
This depends on the product's shape and quantity. Please contact us first. Once we understand your requirements, we will propose the best approach.
Can you advise on selecting resin and metal materials?
Yes. We can advise on combinations of resin and metal based on the product's application and required performance.

CONTACT

Consult Us About Dies and Molds

We welcome inquiries about die and mold manufacturing and quotations.
You can consult us even before your specifications are finalized.

Product Inquiries