ELECTRONICS INJECTION MOLDING

Custom Plastic Electronics Enclosures Service

From raw CAD data to retail-ready electronic housings, Rally Plastic offers professional injection molding services for your custom electronics parts.

ISO 9001:2015 Certified
RoHS & REACH Compliant
NDA Protected
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Custom Plastic Electronics Enclosures

Electronic Plastic Parts Manufacturer In China

Located in Zhejiang, China, Rally Plastic is an experienced manufacturer specializing in molded plastic parts. With over 10 years of experience in plastic injection molding, our facility integrates professional mold development, injection molding production, and quality inspection capabilities.

Our manufacturing facility covers 60+ injection molding machines with precision mold processing equipment, and professional inspection tools. We produce high-quality plastic electronic housings, covers, and functional components using engineering plastics such as ABS, PC and other application-specific materials.

Plastic Parts Manufacturer in China

4M+

Electronics Parts Manufactured

80+

Electronics Clients

10+

Years History

Our Capabilities

Custom Electronics Injection Molding Services

Rally Plastic offers custom plastic injection molding for consumer electronics. Whether you require internal tooling development or high-volume electronic component production, our team can meet your specific needs.

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Plastic Injection Molding

Plastic Electronic Components

Production of structural frames, brackets, and bezels. Optimized injection pressure ensures precise fit-up with mating components.

Zero Warping
Mold Manufacturing

Plastic Enclosure Mold

High-tolerance injection molds built for internal presses. Advanced tooling standards ensure longer mold life with minimal parting lines.

Class 101 Tool Steel (S136, NAK80)
Prototype Injection Molding

Multi Cavity Injection Molding

High-volume manufacturing for consumer electronics. Drastically reduce per-part costs while maintaining uniform physical dimensions.

Balanced Hot/Cold Runner Systems
Customized to your needs

Electronic Plastic Parts We Serve

Rally Plastic can manufacture high precision injection molds for many plastic electronic plastic components, contact us if you have further customization requirements.

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Plastic Computer and Audio Parts

Plastic Computer and Audio Plastic Parts

Rally Plastic offers these parts with high dimensional stability, flat surfaces without warpage, and precise PCB mounting supports. Carefully calculate mold shrinkage to ensure perfect alignment for high-density ports.

Sample Products:
USB-C docking station housings Mouse covers Mechanical keyboard keycaps External hard drive enclosures Smart speaker grilles
Plastic Adapter Cases

Plastic Adapter Cases

Power electronics demand strict compliance with flame retardancy (UL 94-V0) and thermal performance. Our molds are designed for optimal melt flow to handle high-temperature engineering plastics.

Sample Products:
Fast-charger adapter plugs Wireless charging pads Power bank shells Automotive phone mount brackets Cable strain relief boots
Handheld Controller and Button Components

Handheld Controller & Button Components

Rally Plastic provides buttons and control panels high-precision tooling to ensure smooth actuation without sticking, along with optical clarity for light pipes.

Sample Products:
Gamepad controller shells Remote control button pads LED indicator light pipes Transparent sensor windows Tactile switch caps
Plastic Wearable Device Shells

Plastic Wearable Device Shells

For wearable tech, our mold design strictly controls parting lines, gate vestiges, and cosmetic defects. We utilize biocompatible materials and multi-material molding to ensure skin-safe contact and IPX7/IPX8 water resistance.

Sample Products:
Bluetooth earbud casings Smart watch chassis frames VR headset faceplates Fitness tracker bands Hearing aid shells

Our Manufacturing
Facility & Equipment

Rally Plastic Factory Overview
1M+ Monthly Outpt
Precision Injection Molding Workshop

Precision Injection Molding Workshop

Equipped with 60+ advanced injection molding machines ranging from 100T to 1000T, featuring automated robotic arms for high-efficiency, consistent production.

Brands: Yizumi, Haitian, Engel
In-House Tooling & CNC Center

In-House Tooling & CNC Center

High-precision 5-axis CNC machining centers, high-speed EDM, and wire cutting machines ensure strict quality control, lower tooling costs, and faster lead times.

Tolerance: Up to ±0.03mm
Advanced Quality Inspection Lab

Advanced Quality Inspection Lab

Comprehensive measurement and testing tools to verify structural dimensions, material integrity, and surface finish before global shipping.

Includes: CMM, Projector, Colorimeter

Premium Plastics for Electronics Injection Molding

Match your custom electronics project with Rally Plastic’s premium engineering resins. Browse the material selection below, and contact our application engineers directly to resolve any material compatibility questions

ABS Application
ABS Electronics Enclosures
ABS Pellets
ABS Pellets

ABS

Electronics Applications
  • Bluetooth earbud charging cases
  • TV remote controls
  • Smart speaker bezels
Surface Finishes Options
SPI A-2 (High Gloss) VDI 24 Pad Printing
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PC Application
PC Application
PC Pellets
PC Pellets

PC

Electronics Applications
  • Smartwatch screen lenses
  • LED light pipes
  • Transparent action camera housings
Surface Finishes Options
SPI A-1 (Mirror Polish) Anti-Fog Coating Laser Engraving
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PC/ABS Application
PC/ABS Application
PC/ABS Pellets
PC/ABS Pellets

PC / ABS Blend

Electronics Applications
  • VR/AR headsets
  • Handheld gaming consoles
  • Smart home security cameras
Surface Finishes Options
VDI 27 (Fine Texture) EMI Shielding Paint Matte Painting
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PA66 + GF Application
PA66+GF Application
PA66 + GF Pellets
PA66+GF Pellets

PA66 + GF

Electronics Applications
  • Drone frames
  • Electric toothbrush handles
  • High-end hair dryer bodies
Surface Finishes Options
VDI 30 (Coarse Texture) Laser Marking Textured Matte
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PMMA Application
PMMA Application
PMMA Pellets
PMMA Pellets

PMMA

Electronics Applications
  • Smart thermostat display windows
  • Digital clock faces
  • Touch panel overlays
Surface Finishes Options
SPI A-1 (Mirror Polish) Anti-Scratch Coating Silkscreening
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Engineered to Global Standards: Certifications & Compliance
ISO 9001:2015 certification

ISO 9001:2015 Certified

Standardized Quality Management

RoHS compliance

RoHS Compliant

Eco-Friendly & Safe Polymers

REACH Compliant

REACH Compliant

Verified China Factory

NDA protected intellectual property

100% NDA Protected

Your IP & CAD Drawings are Safe

UL Certification

UL Certification

Certified Engineering Plastics

Rally Plastic engineering and injection molding support
Fast Engineering Support Free DFM Review Available
Get In Touch

Start Your Injection Molding Project

Upload your 2D/3D files for a fast, competitive quote. Turn your designs into reality.

Special Design For Plastic Electronics Enclosures

Go beyond standard plastic electronic housings with Rally Plastic's custom molding solutions that improve assembly efficiency, durability, sealing performance, and product aesthetics.

Insert Molding

Embed brass inserts, terminals, or metal components directly into plastic parts, reducing assembly steps while improving fastening strength and reliability.

Two-Shot Molding

Mold two materials or colors in one cycle, creating integrated buttons, transparent windows, and premium product appearance.

Overmolding

Combine rigid plastics with TPE or TPU to create soft grips, impact protection, and enhanced sealing for handheld electronic products.

Snap-Fit Design

Replace screws with molded snap-fit features, reducing assembly time, lowering costs, and simplifying product maintenance.

Waterproof

Support gasket grooves, O-ring channels, and ultrasonic welding for enclosure designs requiring reliable dust and water resistance.

PCB Mounting

Integrate bosses, locating pins, and support ribs to ensure accurate PCB positioning and stable assembly.

DFM Engineering for Flawless Electronic Housings

Optimize your custom electronics enclosures for flawless mass production with Rally Plastic’s complimentary DFM (Design for Manufacturability) analysis.

Before a mold is cut, our engineering team reviews your 2D/3D files to identify critical moldability risks specific to consumer devices.

DFM Engineering Analysis

Our Critical DFM Inspection Areas:

  • PCB Alignment
  • Wall Consistency
  • Fastening Integrity
  • Assembly Clearance
  • Cosmetic Gating
  • Draft angle for side walls
T1 Trial Production Validation

T1 Trial & Production Validation

At Rally Plastic, we do not treat T1 simply as a check to see if plastic fills the mold. Instead, our engineering team utilizes this initial run to validate how your real-world enclosures assemble, fit, and perform under mechanical stress.

  • T1 sample molding
  • Part appearance inspection
  • Gate vestige & ejector pin mark review
  • Screw boss & snap-fit physical review
  • Dimensional inspection report
  • Shrinkage & warpage evaluation
  • Detailed sample photos, videos
  • Feedback report

Component Protection With Anti-Static (ESD) Packaging

Electronic components are highly sensitive to dust and electrostatic discharge. Rally Plastic packs your electronic injection molding products in custom-fitted ESD trays or anti-static bags within climate-controlled environments. We ensure your enclosures arrive clean, scratch-free, and directly ready for assembly.

Anti-Static ESD Packaging

Streamlined Injection Molding
Manufacturing Process

Simply upload your CAD files to receive a free DFM report and moldflow analysis.

Upload CAD
STEP 1

Upload CAD /
Drawings

Free DFM review
STEP 2

Free DFM Review

Mold design
STEP 3

Mold Design

Mold manufacturing
STEP 4

Mold Manufacturing

T1 sampling
STEP 5

T1 Sampling

Mass production
STEP 6

Mass Production

Quality inspection
STEP 7

Quality Inspection

Global shipping
STEP 8

Global Shipping

FAQ For Electronics Enclosures

Find answers about tooling ownership, production capabilities, materials, lead times, and our injection molding process.

What is your Minimum Order Quantity (MOQ) for plastic electronics parts?
For rapid bridge tooling, our MOQ starts at just 100 parts. For high-volume plastic injection molding runs using hardened steel molds, we scale seamlessly from 1,000 to 1,000,000+ units, supporting your project across every product lifecycle stage without rigid volume restrictions.
Who owns the injection molds once the tooling invoice is settled?
You retain 100% ownership of the tooling. Rally Plastic stores and maintains your molds in our secure facility, backed by a lifetime warranty—we repair, service, or rebuild the tool at our own cost for the entire life of your project.
Are there any hidden fees in your custom molding quotes?
No! Rally Plastic operates with absolute transparency. Your custom quote clearly details tooling costs, per-part pricing, and packaging. We do not apply hidden offshore surcharges, ensuring your final invoice matches your initial quote exactly.
How do you protect our intellectual property (IP) and proprietary electronic designs?
We protect your proprietary designs with strict confidentiality. Rally Plastic signs industry-standard NDAs before you submit any CAD files. Internally, file access is restricted exclusively to the project engineers and manufacturing specialists assigned to your project.
Do you handle global shipping and customs clearance for overseas buyers?
Yes! We provide complete logistics coordination, shipping directly to your assembly facility. Whether you require FOB, CIF terms, we manage export documentation and use secure anti-static packaging to ensure your parts arrive in pristine condition.
Can we get pre-production samples to test the fit with our PCBs?
Absolutely. Before authorizing mass production, you will receive physical, injection-molded T1 samples. This allows your engineering team to verify snap-fits, screw boss tolerances, and PCB alignment in real-world assembly tests prior to volume manufacturing.
Which CAD file formats are required to receive a formal injection molding quote?
Please upload your 3D designs in .STEP (.STP) or .IGS formats. For enclosures requiring tight tolerances, molded-in inserts, or specific finishes, include a 2D PDF/DWG drawing to specify these critical engineering details.
What happens if our PCB design changes after you have already started cutting the tooling?
We work dynamically with your team to accommodate modifications. If the tool is already in progress, we analyze your revised CAD files to find "steel-safe" modifications that alter the existing mold, saving you the cost of building a new tool.

Technical Guidance:
Electronics Injection Molding

Injection molding process

How to injection mold electronics?

Injection molding electronics usually starts with enclosure design optimization, material selection, and DFM analysis. Engineers need to consider wall thickness, draft angles, ribs, bosses, snap fits, and assembly requirements before tooling. At Rally Plastic, we review CAD files to identify molding risks and recommend solutions before mold manufacturing begins.

design

What features should be considered for injection molded electronic parts?

Custom electronic plastic parts frequently require highly specific integrated features to function correctly. Designers must carefully incorporate PCB mounting bosses, threaded screw posts, secure snap fits, isolated battery compartments, thermal ventilation slots, and internal cable routing structures. Designing these features properly is crucial for improving downstream assembly efficiency and structural integrity. By optimizing these elements early, Rally Plastic helps maintain tight dimensional accuracy, ensures perfect component fit-up, and significantly reduces the need for costly secondary machining operations.

Draft Angle

How much draft angle is needed for plastic electronic housing designs?

For most injection molded electronic enclosures, a standard draft angle of approximately 0.5° to 2° per side is highly recommended. This taper is critical to ensure smooth part ejection from the mold cavity and to protect external cosmetic surfaces. However, textured surfaces may require an additional 1° to 1.5° of draft for every 0.001 inches of texture depth. Implementing proper draft design early helps prevent undesirable drag marks, severe scratches, internal stress build-up, and costly long-term mold damage. (78 words)

Defect Prevention

How do you prevent sink marks and warpage in injection molded electronic housings?

Sink marks and warpage are typically caused by uneven wall thickness, improper structural rib design, cooling imbalances within the mold, or incorrect processing parameters. Our engineering team actively prevents these defects by ensuring uniform wall thickness and optimizing rib-to-wall ratios during the design phase. Furthermore, Rally Plastic utilizes advanced mold flow analysis to simulate the injection process before tooling. This allows us to optimize gate locations, cooling channel layouts, and packing pressure, ensuring perfectly flat, defect-free electronic enclosures.

Surface Finishes

What surface finishes are available for injection molded electronic housings?

Rally Plastic provides a comprehensive range of premium surface finishes tailored for custom electronic enclosures. Our options include high-gloss SPI polishing, fine or coarse textured surfaces, standard VDI finishes, custom color painting, precision laser marking, and detailed silk screening. Selecting the correct surface treatment is essential, as it significantly enhances the overall product appearance and reinforces brand identity. Additionally, a proper finish improves ergonomics, hides minor cosmetic defects, and provides essential resistance to scratches, fingerprints, and daily wear.

Contact Rally Plastic To Start Your Project

Send us your 2D/3D files or project requirements. Our engineering team will deliver a detailed quotation with free DFM suggestions within 24 hours.

Email Address

quote@rallyplastic.com

Phone Number

+86-173 9807 5880

Office Location

Building 10, Shiyi Center, Yinzhou District, Ningbo, Zhejiang, China

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