Plastic Injection Mold 3C Product S136 High Precision

3C Product Injection Mold | S136 High Precision Tooling

Product Overview

This project focuses on the design and manufacturing of high precision plastic injection molds for 3C electronic products, using S136 mold steel to ensure durability, corrosion resistance, and surface quality.

3C plastic components—such as electronic housings, structural parts, and small precision assemblies—require:

• Stable dimensional accuracy

• Clean cosmetic surfaces

• Reliable mass production performance

• Consistent assembly compatibility

We provide custom injection mold manufacturing (Built-to-Print) based on customer 3D data and production requirements, covering mold design, precision machining, assembly, and trial validation.

The use of S136 high-precision mold steel makes this tooling suitable for appearance-sensitive and long-life production molds.

Application Scenarios

This type of plastic injection mold is widely used for:

• 3C electronic product housings

• Small precision plastic structural parts

• Consumer electronics components

• Plastic parts made of ABS, TPU, TPR and similar materials

• High-appearance plastic components

These products typically require tight tolerance control and stable cosmetic performance.

Key Engineering Focus

Injection molds for 3C products must balance precision, surface quality, and long-term production stability.

1) Mold Material – S136 for High Precision & Surface Finish

S136 stainless mold steel offers:

• Good corrosion resistance

• Excellent polishability for high-gloss surfaces

• Stable hardness after heat treatment

• Long service life in high-cycle production

Proper heat treatment and finishing processes are essential to maintain dimensional stability and surface quality.

2) Dimensional Accuracy & Structural Fit

3C components often integrate with electronic and mechanical assemblies.

• Shrinkage compensation considered during mold design

• Accurate shut-off structure and parting line alignment

• Stable mold alignment system

• Controlled tolerances for internal features

Dimensional stability ensures reliable assembly and high production yield.

3) Surface Quality & Cosmetic Control

For appearance-sensitive parts:

• Gate location optimized to reduce weld lines

• Flow balance designed to minimize sink marks

• Mirror polishing or texture finishing applied as required

• Flash prevention through precise mold fitting

Surface control is critical for consumer electronics products.

4) Process Stability for Mass Production

• Hot runner or cold runner system based on project needs

• Balanced cooling layout for dimensional consistency

• Stable machining sequence to minimize internal stress

• Trial molding and process optimization before shipment

The objective is stable production performance after mold delivery.

Mold Specifications

• Product Type: Custom Plastic Injection Mold for 3C Products

• Mold Steel: S136 (optional: 1.2343ESR / NAK80 etc.)

• Product Materials: ABS / TPU / TPR / other specified plastics

• Gate Type: Side gate / Sub gate / Pin point gate / Fan gate / Direct gate

• Runner System: Hot runner or Cold runner

• Mold Base: LKM / HASCO / DME / FUTABA

• Mold Life: Up to 1,000,000 shots (depending on structure and material)

• Supported Drawing Formats: STP / STEP / IGS / PRT / X_T

• MOQ: 1 Set

Manufacturing Capabilities

We manufacture single-cavity and multi-cavity molds according to customer requirements.

• Maximum mold size: 2500 × 2000 × 1500 mm

• Machining precision: ±0.005 mm

• Injection precision: ±0.03 mm

• Delivery time: 25–45 days depending on mold complexity

In-house precision equipment includes:

• CNC machining centers

• EDM and mirror EDM machines

• Wire cutting machines

• Coordinate Measuring Machine (CMM)

All molds undergo dimensional inspection and trial molding before shipment.

Project Workflow

1. Product data review and DFM analysis

2. Mold structure design confirmation

3. Steel preparation and machining

4. Precision finishing and EDM processing

5. Mold assembly and fitting

6. Mold trial and parameter optimization

7. Final inspection and delivery

This structured process improves first-trial success rate and reduces production risks.

Why Work With Us

• Experience in high precision 3C product injection molds

• Use of S136 and high-grade mold materials

• Stable machining accuracy with in-house equipment

• Complete mold manufacturing and supply chain management

• One-year after-sales technical support

Our focus is on delivering molds that operate reliably in mass production.

Technical FAQ

Q1: Why is S136 steel recommended for 3C molds?
S136 offers good corrosion resistance and excellent polishability, making it suitable for high-appearance and high-precision plastic parts.

Q2: Can different plastic materials such as ABS, TPU, and TPR be supported?
Yes. Mold design and runner configuration are optimized according to material characteristics.

Q3: Is multi-cavity mold design available?
Yes. Both single-cavity and multi-cavity configurations are supported based on production volume.

Q4: How is machining accuracy controlled?
Through precision CNC machining (±0.005 mm), stable assembly control, and dimensional verification before trial molding.

Q5: Do you provide support after mold delivery?
Yes. Technical assistance and mold optimization support are available after shipment.

Request a Quotation

To receive a quotation for a Plastic Injection Mold for 3C Products, please provide:

• 3D product files

• Plastic material specification

• Surface finish requirements

• Expected annual production volume

• Target delivery time

Our engineering team will evaluate your data and provide a detailed mold proposal.