Peek Plastic Injection Molding

What Is PEEK Plastic?

Before diving into the process, let’s talk about the material itself.
PEEK (Polyether Ether Ketone) is a high-performance thermoplastic known for its incredible mechanical strength, chemical resistance, and ability to withstand high temperatures (up to 260°C / 500°F continuously).

Unlike standard plastics such as ABS or polypropylene, PEEK belongs to a class of engineering polymers used in advanced industries like aerospace, automotive, medical, and electronics — where precision and durability are non-negotiable.

In short: PEEK injection molding gives you metal-like strength with the lightweight benefits of plastic.

Why Choose PEEK for Injection Molding?

Choosing PEEK isn’t just about material choice — it’s about engineering confidence. Here’s why manufacturers prefer injection molding PEEK for critical components:

1. Exceptional Temperature Resistance

PEEK maintains its mechanical properties even in extreme heat. It can continuously operate at temperatures exceeding 250°C (480°F), making it ideal for under-hood automotive parts, aerospace applications, and high-temperature connectors.

2. Outstanding Chemical Resistance

PEEK resists harsh chemicals, solvents, and acids better than most plastics. This makes it a popular choice for medical and industrial applications where chemical exposure is common.

3. Superior Strength & Stiffness

When reinforced with carbon or glass fibers, PEEK plastic molding produces parts that can rival metals in rigidity and load-bearing capacity.

4. Lightweight Alternative to Metal

PEEK delivers up to 70% weight reduction compared to metal without compromising strength — perfect for industries aiming to improve efficiency and reduce fuel consumption.

5. Excellent Dimensional Stability

PEEK components maintain tight tolerances even under thermal or mechanical stress, making them perfect for precision injection molded parts.

6. Biocompatibility

PEEK is biocompatible and can be sterilized repeatedly, which is why it’s widely used in medical devices, implants, and surgical tools.

Industries That Rely on PEEK Injection Molding

PEEK’s versatility makes it a go-to material across multiple industries. Let’s explore where PEEK plastic injection molding truly shines.

Aerospace

In aerospace engineering, lightweight strength and thermal stability are crucial. PEEK plastic molding is used to produce brackets, clamps, bushings, and insulation components that must perform under high stress and extreme temperatures.

Automotive

As vehicles become more advanced and electrified, injection molding PEEK plays a key role in creating under-the-hood components, transmission parts, and electrical connectors resistant to heat and chemicals.

Medical Devices

PEEK’s biocompatibility allows it to replace metals in implants, surgical instruments, and sterilizable device housings. It’s lightweight, durable, and safe for long-term body contact.

Electronics & Electrical

Because of its high dielectric strength and flame resistance, PEEK injection molding is ideal for semiconductor machinery parts, cable insulation, and electronic connectors.

Oil, Gas & Energy

PEEK resists aggressive chemicals, high pressure, and temperature variations — making it perfect for seals, valves, and compressor components in energy systems.

Industrial & Robotics

For automation and heavy-duty machinery, PEEK components offer excellent wear resistance and friction performance. Think of PEEK plastic molding as the secret behind reliable robotic systems.

Our PEEK Plastic Injection Molding Capabilities

At LXG Injection Molding, we combine advanced technology, material science, and precision tooling to deliver top-tier PEEK injection molded components.

Here’s how we do it:

1. Material Selection & Consultation

Our engineers help you choose the right grade of PEEK for your application — whether it’s unfilled PEEK, glass-filled, or carbon-fiber-reinforced. Each variant has distinct benefits in terms of mechanical strength, wear resistance, and cost.

2. Advanced Mold Design

PEEK molding requires specialized tooling due to its high processing temperature (up to 400°C / 750°F).
We design precision injection molds that can handle these conditions while ensuring minimal part shrinkage and dimensional accuracy.

3. High-Temperature Injection Molding

We use advanced machinery capable of maintaining high melt temperatures and consistent injection pressure. This ensures that the injection molding PEEK process produces strong, defect-free parts every time.

4. Post-Processing & Finishing

After molding, parts may undergo annealing, machining, or surface finishing to improve crystallinity, reduce stress, or achieve the required surface texture.

5. Quality Control

Every PEEK plastic injection molding project undergoes rigorous inspection, including CMM (Coordinate Measuring Machine) verification, SPC analysis, and FAI reports — ensuring zero compromise on quality.

Benefits of Working with LXG Injection Molding

When it comes to PEEK plastic molding, precision and expertise matter. At LXG, we bring both — and more.

Here’s why clients around the world trust us:

✅ Two decades of experience in high-performance injection molding
✅ Specialized tooling design for high-temperature materials like PEEK
✅ Prototypes in as little as 5–7 days
✅ Full scalability from prototype to production
✅ ISO 9001, ISO 13485, FDA, and RoHS certifications
✅ Global delivery — serving clients in over 40 countries

We don’t just mold parts — we build partnerships based on reliability, speed, and precision.

The PEEK Injection Molding Process Step by Step

Here’s what the typical process looks like when you partner with LXG Injection Molding:

Step 1: Project Consultation

We start by understanding your requirements — design, function, material, and volume. Our engineers then assess feasibility and recommend the best injection molding PEEK approach.

Step 2: Mold Design & Simulation

Our team uses advanced CAD/CAM software and flow analysis to simulate mold filling, shrinkage, and cooling. This ensures flawless results before production begins.

Step 3: Tooling & Mold Manufacturing

Once approved, we create high-temperature injection molds using hardened steel capable of withstanding PEEK’s processing demands.

Step 4: Prototyping & Testing

We produce small-batch PEEK molded samples for validation, allowing you to test fit, function, and aesthetics before mass production.

Step 5: Full Production

With final approval, we scale to full production — delivering consistent parts with fast lead times and tight tolerances.

Step 6: Quality Inspection & Delivery

Each batch is checked for dimensional accuracy, structural integrity, and surface finish before being packaged and shipped worldwide.

PEEK vs Other Engineering Plastics

Why choose PEEK injection molding over other engineering plastics like PPS, Ultem, or Nylon?

As you can see, PEEK plastic molding offers a unique balance of high heat resistance, chemical durability, and mechanical strength unmatched by most plastics.

Applications of PEEK Injection Molding

Some real-world examples of where injection molding PEEK is used:

• Aircraft engine brackets

• Automotive transmission components

• Surgical instrument handles

• Semiconductor wafer supports

• Electrical connectors

• Oil and gas seals

• Robotic actuator parts

If your part needs to withstand heat, pressure, and chemical exposure — PEEK plastic injection molding is likely the best solution.

Cost of PEEK Injection Molding

PEEK is a premium engineering polymer, and its cost reflects its performance. While PEEK plastic molding is more expensive than standard polymers, the long-term value it delivers — reduced maintenance, improved performance, and extended service life — far outweighs the upfront investment.

At LXG Injection Molding, we help you optimize costs through:

• Efficient mold design

• Smart material utilization

• Scalable production strategies

• Reusable tooling for future orders

👉 Request a custom quote today for an accurate cost estimate based on your design and quantity.

Why Partner with LXG Injection Molding for PEEK Projects?

Because we don’t just mold PEEK — we master it.

We understand the challenges of working with high-performance polymers and have built the tools, processes, and expertise to deliver parts that meet your strictest requirements.

From aerospace-grade prototypes to medical-grade assemblies, our PEEK plastic injection molding services combine craftsmanship with innovation to deliver unmatched precision and reliability.

When you work with LXG Injection Molding, you get:

• Expert guidance from material selection to production

• Global delivery with local support

• Guaranteed consistency and repeatability

• Faster time-to-market with shorter lead times

Get Started with LXG Injection Molding

If you’re ready to experience the strength and performance of PEEK injection molding, LXG is here to help.

Our team is ready to guide you from concept to completion — with fast turnaround, technical support, and the industry’s best quality assurance.

👉 Contact LXG Injection Molding today to request a quote or discuss your PEEK project.
Let’s build something extraordinary — together.