Insert molding
Overmolding
Unscrewing molds
Automotive
Electronics
Home appliance
Industrial equipment
Medical devices
Machinery & automation
Overmolding
Overmolding
Overmolded Plastic Part for Electronic Devices
ABS housing with a TPE soft-touch layer for a handheld electronic device, two-cavity H13 tooling.
ABS, TPEAISI H132 cavities
Engineering details
4 typical projects · Overmolding Parts
Overmolding parts
Soft-touch grips, seals and protective layers in TPE or TPU, bonded to rigid ABS, PC or nylon substrates in the mold. One part, no glue, no assembly.
Projects
These are examples, not a catalogue. Every part is made to the customer’s own design. Send yours for a DFM review.
Overmolding
Overmolding
Overmolded Handle Parts
ABS/TPE two-material handles for home appliances and tools, built to HASCO or DME standard.
ABS/TPEAISI H132 cavities
Engineering details
Overmolding
Overmolding
Overmolding Parts for Food Boxes
PC food-box lid with a TPU overmolded seal, two-cavity H13 overmold tooling.
PC, TPUAISI H132 cavities
Engineering details
Overmolding
Overmolding
Overmolded Medical Parts
ABS grip with a TPU overmold for a medical handpiece, two-cavity H13 tooling.
ABS and TPUAISI H132 cavities
Engineering detailsWhat overmolding adds to a product
Overmolding molds a second material over a first one. Usually a rigid substrate gives structure and a soft TPE or TPU layer adds grip, comfort, sealing or impact protection. Because the bond forms in the mold, there is no glue line to fail and no loose part to assemble.
Overmolded parts we make
- Handles for appliances and tools, ABS/TPE.
- Food box lids with PC bodies and TPU seals.
- Electronic device housings with ABS bodies and TPE grips.
- Medical handpieces with ABS bodies and TPU grips.
Material pairs that bond
| Substrate | Soft material | Typical use |
|---|---|---|
| ABS, PC/ABS | TPE, TPU | Tools, appliances, electronics, medical |
| PC | TPU | Food containers, clear housings |
| PA6 / PA66 | Modified TPE | Heavy-duty and automotive handles |
| PP | TPE | Household and outdoor products |
| Metal | TPE, TPU | Needs mechanical interlocks |
Overmolding or two-shot molding?
Overmolding in two separate molds has a lower tooling cost and suits moderate volumes. Two-shot (2K) molding produces both materials in one machine and one rotating mold, with lower part cost at high volume. We have a vertical press set up for 2K work and can advise which route fits your volume.
Getting the details right
- Shut-offs machined so the soft material stops exactly at the design edge.
- Mechanical anchors (holes, grooves, undercuts) where chemical bonding is weak.
- Substrate temperature and drying controlled, since both affect bond strength.
- Peel or bond tests on T1 samples.
What is the difference between overmolding and insert molding?
Overmolding bonds a second plastic, usually a soft TPE or TPU, over a plastic substrate. Insert molding molds plastic around a metal or pre-made component.
Which soft materials do you use?
TPE and TPU grades chosen for compatibility with the substrate, in hardness from very soft to semi-rigid, including food-contact and medical grades.
Is the bond strong enough for daily use?
With compatible materials and correct processing, the bond usually exceeds the strength of the soft material itself. We test it on T1 samples.
Can overmolding create a waterproof seal?
The soft layer can form gaskets and seals at joints. Full water resistance depends on the whole product design, which we review in DFM.
Get a quote
Get a quote — it takes one minute.
Share a 3D file, 2D drawing, sample photo or sketch. A mold engineer — not a sales robot — checks moldability before we quote tooling and part price.
- 1Upload STEP / IGES / STL / DWG / PDF. We sign an NDA on request.
- 2We review wall thickness, draft, gating, undercuts and tolerances, and propose steel, cavities, runner and mold standard.
- 3You receive the mold and part quotation, with a free design check (DFM report) showing any risks we found.
Quotessales@precisemoulds.com
Engineeringengineering@precisemoulds.com
After-salescustomerservice@precisemoulds.com
Phone+86 755 8951 6139