High-quality multi-shot injection molds for tools and accessories. Specializing in 2K overmolding, soft-touch grips, and high-strength tool housings. Custom mold solutions for hand tools, power tools, and industrial accessories.
Tools & Accessories Multi-Shot Injection Molds
Engineered for High-Grip, High-Durability, Multi-Material Components
At Euromicron Mould Engineering Limited, we design and build multi-shot injection molds (also known as 2K molds, two-shot molds, and overmolding tools) specifically for the hand tools and industrial accessories sector.
This industry requires parts that combine:
high mechanical strength
excellent surface grip
accurate color separation
long-term impact resistance
consistent dimensional stability
Our engineering team has delivered hundreds of multi-material molds for professional tools used in construction, automotive maintenance, power tools, industrial equipment, and home improvement.
Why 2K / Multi-Shot Molding for Tools & Accessories?
Tool components often require rigidity + ergonomics at the same time.
Typical material combinations include:
|
Function |
Material Combination |
Application |
|
Rigid structure + soft-grip handling |
PP/ABS + TPE |
Screwdriver handles, wrench grips |
|
Dual-color identification |
ABS + PC |
Power tool housings |
|
Impact-resistant + Anti-slip |
Nylon + TPE |
Hammer handles, cutters |
|
Hard substrate + soft cushioning finger areas |
PP + TPR |
Hand tool knobs, switches |
|
Chemical-resistant surfaces |
Nylon + TPU |
Industrial tool components |
Multi-shot molding improves:
long-term durability
ergonomic comfort
product branding (color/logo separation)
precision assembly of multi-material interfaces
production efficiency (no adhesive or secondary assembly)
Types of Tool Components We Build Molds For
1. Screwdriver Handles (2K Soft-Grip)
TPE over PP/ABS
Precision color-line control
High-cavitation options available
2. Power Tool Housings (Multi-Color / Multi-Material)
ABS/PC + TPE
Textured surfaces
Scratch-resistant flow lines
3. Wrench Handle Overmolds
Nylon + TPU
Anti-oil, anti-slip design
Interlock ribs to prevent peeling
4. Toolboxes & Case Handles (Dual-Color)
Rigid outer shell + soft touch areas
Excellent fatigue resistance
5. Button, Switch, Safety Grip Components
High precision tolerance
Wear-resistant mechanisms
Our Multi-Shot Mold Capabilities for Tools
▶ Mold Type
Rotary platen molds (most used for tool handles & housings)
Core-back molds for parts requiring variable thickness
Index plate molds for complex color distribution
Insert overmolding molds for metal-core tools
▶ Technical Highlights
Tight shut-off sealing between materials
Strong mechanical bonding between substrate and overmold
Optimized runner balance for thick TPE sections
Automatic demolding for high-volume production
Mold lifetime up to 1 million cycles
▶ Materials Expertise
PP / ABS / PC
Nylon (PA6 / PA66 + GF)
TPE / TPU / TPR / Santoprene
High-impact engineering resins
Industries Served
Hand Tools Manufacturing
Power Tools & Industrial Tools
Automotive Maintenance Tools
Construction Tools
Consumer Hardware Tools
Outdoor & Garden Equipment
Why Choose Euromicron for Tool Molds?
30 years specializing in multi-material molding
Engineering team experienced with TPE flow control & shut-off geometry
Export-grade mold standards (Europe & USA)
In-house precision machining, CNC, EDM, CMM measurement
Fast sampling & tooling lead time
Technical Specifications for Tools & Accessories Multi-Shot Injection Molds
1. Mold Configuration Options
|
Mold Type |
Applications |
Advantages |
|
Rotary Platen 2K Mold |
Screwdrivers, power tool housings |
Most stable and efficient for high-volume production |
|
Core-Back Mold |
Soft grip areas with thick TPE |
No rotation required, simplified actions |
|
Index Plate Mold |
Multi-color logos, complex two-color surfaces |
Excellent color alignment |
|
Insert Overmolding Mold |
Tools with metal cores, shafts |
Extremely strong mechanical bonding |
|
Vertical Overmold Mold |
TPU grips for small tools |
Suitable for small-batch flexibility |
2. Mold Structure Specifications
Steel Options
Core & Cavity: S136H, 1.2344, H13
Base: 1.1730 or 1.1730 + prehardened 1.2738
Slider Inserts: SKD61
Wear Components: Copper alloy (BeCu) for cooling intensification
Surface Treatment
SPI A1 / A2 for radiant and polished areas
EDM matte for grip textures
Diamond polishing for transparent or glossy areas
Ejection System
Ejector pins
Ejector sleeves
Stripper plate for cylindrical tool handles
Pneumatic ejection for thin TPE overmolds
Centering & Sealing
Clean & sharp：
high-precision shut-off geometry
preloaded tapered fitting
surface sealing ribs
accurate gate balancing to avoid color bleeding
3. Mold Flow & Cooling Optimization
Multi-shot molds, the biggest challenge for the tool industry is
TPE shrinkage and the asynchrony with hard plastics leads to deformation.
We solve it by：
✔ Cooling channel optimization
dedicated channel surrounding TPE zones
double-layer baffle cooling
conformal cooling (optional)
✔ Mold flow analysis
Each project includes:
filling pattern
short-shot checking
shear rate simulation for TPE
weld line analysis
packing/holding pressure distribution
warpage simulation
Application Case Studies
Case 1: European Power Tool Brand – 2K Drill Housing Mold
Product: Electric drill housing
Structure: ABS + TPE overmold, two-color
Mold Type: Rotary platen 2K mold
Cavities: 1+1
Challenges:
precise alignment between hard and soft shells
avoiding TPE peeling during long-term vibration
Solution:
improved shut-off geometry
2° draft increase around the grip zone
optimized flow leader ribs
Result:
Cycle time: 31s
part dimensional repeatability within ±0.03 mm
zero complaint over 2 million shots
Case 2: USA Hand Tool Manufacturer – Screwdriver Handles (4-Cavity 2K Mold)
Material: PP + soft TPE
Hardness Requirement: 65 Shore A
Special Requirement: Two-side anti-slip texture
Key Issues:
TPE wrapping around ribs causing incomplete filling
Our Solution:
adjusted rib thickness
changed gate from point gate → submarine gate
balance the runner for even TPE flow
Outcome:
stable 12s cycle time
perfect bonding (no delamination even with pull tests)
Case 3: Tool Grip Overmolding with Metal Inserts (Brazil Market)
Core: hardened steel insert
Process: vertical machine overmolding
Problem: inconsistent bonding between TPU and metal
Solution:
redesigned undercuts
optimized preheating temperature of metal insert
Outcome:
bonding strength increased by 30%
cycle time reduced by 22%
Industry Pain Points & How Our Mold Solves Them
Pain Point 1: TPE Flashing in 2K Molds
Reason: Shut-off is inaccurate.
Our solution1：
5-axis machining accuracy to ±0.005 mm
shut-off grinding adjustment during T1
Pain Point 2: Soft Material Peeling During Use
common in screwdrivers & pliers grips
Our solution2：
change material pairing (e.g. TPE to GF-ABS)
improved adhesion ribs
higher mold temperature setting
Pain Point 3: Tool Grip Warpage After Cooling
Our solution3：
mold flow warpage analysis
balanced cooling
FAQ
Q: 1.What is multi-shot injection molding for tools?
A: It is a process that forms two materials-usually a rigid substrate and a soft TPE grip-in a single molding cycle.
Q: 2: Why do screwdriver handles use 2K molds?
A: Because 2K molding provides stronger adhesion and better ergonomic comfort compared to gluing or assembly.
Q: 3.Which materials are commonly used for tool overmolding?
A: ABS, PP, PC, Nylon (rigid) + TPE, TPU, Santoprene (soft).
Q: 4.Can multi-shot molds support high-volume production?
A: Yes. Our molds reach 500,000 to 1,000,000+ shot life.
Q: 5: How long does it take to build a 2K tool mold?
A: Typically 6–8 weeks, depending on structure and size.
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