Our Mechanical Engineering Capabilities

Jun 11, 2020 2:53:01 PM

Check out our capabilities for different additive and subtractive production methods. Whether you are working on your prototype or trying to expand your manufacturing efficiency, NexPCB has you covered!

Table of Contents

1. 3D Printing

  1. a. SLA
  2. b. FDM
  3. c. SLM
  4. d. SLS
  5. e. MJF

2. CNC Machining
3. Injection Molding


3D PRINTING

SLA

SLA 3D Printing

Stereolithography (SLA) method of 3D printing is based on solidifying a photosensitive resin with UV laser. SLA has been around for a long time, and it offers one of the most mature additive manufacturing technologies out there. Allowing high-speed manufacturing with a smooth surface finish, SLA offers precision down to each micron. Our SLA manufactured parts are best suitable for visually pleasing, “looks-like” models that you can take to your investors and backers alike.

Layer Height

0.05 - 0.25mm

Maximum Size

450 × 450 × 350 mm

Material

Standard resin, clear resin

Wall Thickness

>0.5mm

Tolerances

±0.1%(min: ±0.15mm)

✅Pros: Great surface finish, high precision.         

❌Cons: High material cost, low tensile strength.

FDM

fdm 3d printing

Models manufactured using Fused Disposition Modelling (FDM) allows for simple mechanical structures that require low maintenance and low material costs. Although a few high-end models can support 0.1 mm, production using FDM is generally restricted to simple parts. We have strict temperature controls during printing, which has a great effect on finished product quality.

Layer Height

0.1-0.2 mm

Maximum Size

200 × 130 × 150mm

Material

ABS, PLA, Nylon, Carbon Fiber

Wall Thickness

>0.8mm

Tolerances

±0.5% (min: ±0.5mm)

Pros: Complex structures, mechanical properties that resemble cast parts.                             

❌Cons: Need for additional machining, rough surface finish, support brackets for larger parts.

SLM

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Selective Laser Melting (SLM) consists of a single component, powdered metal material formed by laser melting, layer by layer. SLM is bound to become more and more popular for manufacturing parts that require material properties of metals, and the flexibility of 3D printing. It is suitable for products with short life cycles and complicated structures. However, this method can be quite costly, especially if the design isn’t optimized specifically for this method. With SLM, sacrificing on precision and surface finish can be justified for producing metal parts with short lifecycles that don’t require additional tooling and molding. 

Layer height

0.02-0.1mm

Max size

105x105x200mm

Material

Stainless steel 316, Titanium alloy, AlSiMg10

Wall thickness

0.02-0.1mm

Tolerances

±0.5mm

Pros: Complex structures, mechanical properties that resemble cast parts.                               

❌Cons: Need for additional machining, rough surface finish, support brackets for larger parts.

SLS

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We employ Selective Laser Sintering (SLS) when we require the ability to form complex shapes, yet don’t wish to add many support structures like we do with SLM. Say goodbye to manufacturing in multiple parts and having weak joints. With SLS, you can manufacture nylon parts that are almost indistinguishable from injection molded ones.

Layer height

0.06-0.15mm

Max size

 750 x 550 x 550 mm

Material

Nylon, flexible TPU

Wall thickness

~0.7 mm

Tolerances

± 0.3% (minimum± 0.3 mm)

Pros: No need for additional support material. Multiple parts can be printed at once.

❌Cons: Requires high end technology, cool-down period can take a long time. 

MJF

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Although quite similar to SLS, HP's Multi Jet Fusion(MJF) technology offers a better eye for detail when it comes to sharp edges and features that are too small to be successfully printed by SLS.

Layer height

0.07-0.1 mm

Max size

380 x 285 x 380

Material

Nylon 12

Wall thickness

~0.6 mm

Tolerances

± 0.25% (minimum± 0.25 mm)

 ✅Pros: Heats whole layer at once, therefore fast. Price per part very affordable.
 ❌Cons: Material selection restricted to Nylon PA12, high cost of machinery. 
 
Want to see which 3D Printing Technique is better suitable for your prototype? Send us your designs and our engineers will check it for you free of charge!
CHECK MY DESIGNS NOW

CNC Machining

Using our CNC Machining service allows you to produce parts from as few as short lifecycle prototypes to hundreds of pieces for pilot-runs and otherwise hard to manufacture parts. Our distributed manufacturing network ensures that your parts can be delivered with very short lead times and against disturbances with the supply chain.

cnc-menu

Large Material Selection

We work with a large selection of metal and non-metals. Our engineers can guide you in selecting the right material for the right application.

Some of the common materials we use are:

Metals Copper, Steel
Non-metals ABS, Nylon, PP

Highest Precision, Up to 5-Axis

By only working with manufacturers with the best CNC capabilities, we ensure that the difference between what’s designed onscreen vs. what is produced falls within the lowest tolerance levels in the industry. Our 5-axis mills can reach ±0.01mm precision.

Perfect Surface Finish

Whether it is for aesthetics, or for specific application purposes, we can fine-tune your machined parts to perfection.

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etching
 

For metals we provide:

  • Anodizing (Black or Natural color),
  • Passivation,
  • Sand Blasting
  • Electroplating (Chrome plated, Galvanized, etc);

 

 

 

For Plastics:

  • Paint Spraying(any color),
  • Silkscreen,
  • Laser etching,
  • Heat transfer printing, among others.
 

 injection molding

Larger volume production requirements will be significantly different from earlier stages. Injection molding allows us to manufacture plastics at larger volumes with the highest speed. We make sure your molds fulfill their lifetime production goals by firstly doing Mold Flow® Analysis on each design. For more info about injection molding, hop on to our blog post here.

We offer both hot and cold runners, and are able to achieve ±0.01mm precision in manufacturing.

Single Material

The single material mold uses materials such as PC, TPU, etc. The molds can be realized at a relatively low price and complexity.IMG_4666-removebg-preview

Multi Material

This method uses dichromatic molds, which can inject two different resins or color batches into a single product, which in turn reduces assembly time and increases manufacturing quality.

 

YOUR DESIGNS*

*Our DFM Optimization

During your prototyping stages, it can be difficult to foresee how Design-for-Manufacturing should be optimized for different additive and subtractive manufacturing methods. Whether your parts require CNC Machining, 3D Printing, or Plastic Injection, our engineers will make sure your designs are match fit for that specific production method. Check out in what other ways we can transform your product ideas for DFM here.

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Want to see which 3D Printing Technique is better suitable for your prototype? Send us your designs and our engineers will check it for you free of charge!

 

Check if my designs are DFM-ready

Quality Control

All products produced by our suppliers are verified and tested for quality by NexPCB. For this reason, we create a custom quality testing procedure for each project we run for you. We also keep personnel "on the ground" at the supplier facility, in order to ensure the stringent quality standards both during and post-manufacturing.

“99.5% yield rate for 5~10K pcs batch volume.”

Knowing where to begin when it comes to prototyping ME parts can be a problem. Prototype with us and have newer, better problems to solve with our 3.5 week rapid prototyping package! Contact us now and see what we can do for your company!

 

Orkun Zafer Ozturk
Community Manager

Orkun has been living in China since 2013. He first came to NexPCB as a customer, and now he's working here as the Community Manager. When he is not busy building electric motorcycles or IoT Steak thermometers, you can find Orkun devising the ultimate baklava recipe.