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Consumer Electronics Enclosure Categories
Electronics parts are small, thin and crowded with features: clips that hold a battery, bosses for screws, windows for a display or a light pipe, and snap fits that let two halves of a housing click together without a screw. Every one of those features has to come out of the mold cleanly and measure the same in every cavity, shot after shot. TK runs a dedicated consumer electronics business unit with its own mold designers, mold fitting technicians and molding lines, and has built more than 50 molds for some part families alone.
What TK Builds Molds For
- Housings, cases and covers: cases, covers and cover plates, including multi cavity and stack molds with interchangeable inserts.
- Frames and brackets: thin wall frames, brackets and mounting rings for the inside of a device.
- Sockets and connectors: precision electrical parts with 200+ controlled dimensions held to CPK above 1.67.
- Decorated and functional surfaces: IML and IMD parts, dead front panels, waterproof windows and in mold structural electronics.
Lifters and Slides for Snap Fits and Undercuts
A snap hook on the inside wall of a cover is an undercut: steel forms the space under the hook, so the part cannot simply be pushed straight off the core. A lifter solves it. The lifter is a steel rod set at a small angle through the core, with its head forming the hook. When the ejector plates move forward, the lifter moves forward with them and, because of its angle, also moves inward, by the ejector stroke times the tangent of the angle. Once that sideways move is more than the hook depth, the head is out from under the hook and the part comes off. Outside undercuts such as side windows and ports are released the same way by slides driven by angle pins or cylinders.
From TK’s Electronics Molds
- Cover plates, 8+8 stack mold: every part has 8 slanted tops (lifters), and all the lifters are interchangeable, so a worn lifter is swapped, not refitted.
- Case and cover, 32 cavities: interchangeable cavity inserts and an injection balance within 5% across the cavities.
- Complex structures: sliders, lifters and optimized inserts are designed for smooth demolding and longer mold life, and checked in DFM and Moldflow before steel is cut.
See the DFM and Moldflow review behind these choices, and size your own lifter with the lifter angle calculator below.
Thin Walls and Tight Tolerances
Thin walls save weight and space, but they freeze fast, so the melt has to reach the end of the part before it stops flowing. TK runs electronic housings with walls under 0.6 mm in stable production by pairing high speed molding with an optimized hot runner, tight temperature control and good venting. Precision starts in the toolroom: molding inserts are machined to 0.002 mm on 5 axis CNC and precision EDM, so cavities and inserts are interchangeable.
Built to Repeat
- Experience: 50+ similar socket molds and more than 20 years of work with global brands.
- Toolroom: 125 CNC mills, 62 EDM, 22 wire EDM, 59 precision grinders and 17 CMMs, with Zeiss CMM and CT in the lab.
- Automated mold component lines: 5 lines of 60 m each running 24 hours at 95% utilization.
- Electronics lab: dimensional, electrical, appearance, reliability and drop testing, including CT, network analyzers, thermal shock and salt spray.
In-Mold Structural Electronics (IMSE), IML and IMD
With IMSE, developed with TactoTek, circuits and electronic components are printed and mounted on a film, the film is formed into a 3D shape, and the plastic is molded around it. One molded part replaces a stack of panels, brackets, switches, boards and wiring. TK’s IMSE example compares a conventional assembly with the smart molded structure:
IML and IMD at TK
- Over 10 years of precision IML and IMD with in house offset, digital and silk screen printing and thermal or high pressure forming of the films.
- Decorative uses: dead front panels, personalized graphics and waterproof windows.
- Functional IML: graphics on the front of the film and printed circuits, SMT components or an antenna or RF circuit on the back, with film and ink selection and circuit protection during forming.
- Proven gain: replacing 2K molding plus PVD with a 2K and IML solution lifted yield from about 50% to over 70% on one program.
TK also offers PDS (printed direct structuring) for antennas on plastic, metal or glass as a lower cost alternative to LDS.
Sealing, 2K, LSR and Finishing
Waterproof products, soft touch grips, clear lenses and decorated housings all need more than a single shot of plastic. TK molds them in house on 503 presses from 6 to 550 tons, mostly Japanese and European, including 60 2K presses, 3 3K presses, 32 LSR presses and 40 vertical presses.
Every program follows TK’s NPI path from RFQ and DFM through prototype, EVT, DVT and PVT builds to ramp up, with FAI, DOE and ongoing reliability testing. To ship the finished mold to your own press, see export molds for US presses.
Interactive Lifter Angle Calculator
Enter the depth of the snap hook or undercut, the clearance you want, the ejector stroke you have and how deep the part sits on the core. The calculator works out the lifter angle you need, the sideways travel it gives, and the shortest stroke that keeps the angle inside your limit. Open “Show the math” to see every step.
Show the math
This is a first check of lifter geometry. The real design also weighs the lifter’s length and section, side load, guidance and wear plates, cooling of the lifter head and how the part is held while the lifter travels, which TK works out in DFM. Default numbers are an example only.
Technical Sourcing FAQ: Consumer Electronics Tooling
Engineering a Precision Electronics Enclosure?
Send your 3D models, volumes and target dates to Brandon Henderson, Technical Sales Support Manager for the Americas. He will review wall thickness, gating, lifters and slides, sealing and decoration with TK’s consumer electronics engineers.