Service Overview

Injection Molding Services

Injection molding produces parts by forcing molten material into a mold where it cools and hardens to the mold’s shape.

eMachineShop offers cost-effective injection molding solutions whether you need a hundred pieces or a large production order.

  • 50+ Materials.
  • FREE Shipping in the USA.
  • 100% Quality Guaranteed.
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What is Plastic Injection Molding?

Plastic injection molding is a process by which granular plastic is fed from a hopper into a heated chamber where it melts and hardens to create parts.

The granules are fed into the heating chamber by a screw-type plunger where they melt. As the plunger advances, the melted plastic is forced through a nozzle into the mold cavity.

Since the mold remains relatively cold, the plastic solidifies almost immediately after the cavity is filled. After the plastic is injected, it must cool before the final part can be ejected from the mold.

Advantages

  • Economical for large quantities
  • Can make almost any 2D or 3D shape
  • Side and threaded holes moldable
  • Finishing not required

Applications

  • Automotive components
  • Gears
  • Washers
  • Wire spools
  • Enclosures

Design Tips for Injection Molded Parts


Use uniform wall thickness
The correct and incorrect way to set uniform wall thickness for injection molding parts

Keep wall thickness between 1/32″ and 1/10″
Optimal wall thickness tips for injection molding parts

Use ribs to strengthen parts
tips for using ribs in injection molding designs to strengthen parts

Use ribs of about half the main wall thickness
Tips showing correct rib thickness in injection molding parts

Round inside and outside corners to a radius of .05″ or greater.
The optimal way to round the inside corners of injection molding parts

Add a 2-degree taper to part walls for easy release from the mold.
Tips showing the optimal taper for walls of an injection molding part

Appearance Optimization

Tip #1

Make the joint at the mold’s parting line pronounced to make it look decorative

Appearance Optimization

Tip #2

Design the gate and pins into less visible places as they can mark parts

Appearance Optimization

Tip #3

Use light-colored material to hide flow patterns

Appearance Optimization

Tip #4

Design surfaces to be matte or textured to hide imperfections

Injection Molding Materials and Specifications

Material Name
Tensile Strength
Specifications
Min Size (mm)
Max Size (mm)
Tolerance (mm)
Clearance (mm)
Min Supported Walls (mm)
Min Unsupported Walls (mm)
Min Supported Wires (mm)
Min Unsupported Wires (mm)
Min Emboss Details (High and Wide) (mm)
Min Emboss Text (High and Wide) (mm)
Min Engrave Details (Deep and Wide) (mm)
Min Engrave Text (Deep and Wide) (mm)
Single Escape Hole Diameter (mm)
Multipe Escape Hole Diameter (mm)
Multiple Parts per File
Interlocking OK
Enclosed OK
Aluminum AlSi10Mg – Matte Selective Laser Melting (SLM) ≈ 88.4% Al, 10% Si, 0.35% Mg, <1.25% Other X + Y + Z > 30 250 x 250 x 200 ±2% 0.6 1 1 1.5 1.5 0.4 0.8 0.4 1 4 2 No Yes No
Stainless Steel 316L – Matte Binder Jetting 100% Single Alloy Stainless Steel 15 × 15 × 3 127 × 127 × 76.2 ±0.508mm 0.3 0.8 1 0.8 1 1 1 1 1 5 2.54 No No No
Stainless Steel 316L – Lightly Polished Binder Jetting 100% Single Alloy Stainless Steel 15 × 15 × 3 127 × 127 × 76.2 ±0.508mm 0.3 0.8 1 0.8 1 1 1 1 1 5 2.54 No No No
Stainless Steel 420, Bronze Infused – Matte Black Binder Jetting 60% Stainless Steel, 40% Bronze Matrix 2.5 × 2.5 × 3 762 × 393 × 393 ±5% 3 1 1 1 1 1 1 1 1 4 2 No No No
Stainless Steel 420, Bronze Infused – Polished Bronzed Black Binder Jetting 60% Stainless Steel, 40% Bronze Matrix 2.5 × 2.5 × 3 762 × 393 × 393 ±5% 3 1 1 1 1 1 1 1 1 4 2 No No No
Stainless Steel 420, Bronze Infused – Matte Bronzed Silver Binder Jetting 60% Stainless Steel, 40% Bronze Matrix 2.5 × 2.5 × 3 762 × 393 × 393 ±5% 3 1 1 1 1 1 1 1 1 4 2 No No No
Stainless Steel 420, Bronze Infused – Polished Bronzed Silver Binder Jetting 60% Stainless Steel, 40% Bronze Matrix 2.5 × 2.5 × 3 762 × 393 × 393 ±5% 3 1 1 1 1 1 1 1 1 4 2 No No No
Stainless Steel 420, Bronze Infused – Polished Bronze Binder Jetting 60% Stainless Steel, 40% Bronze Matrix 2.5 × 2.5 × 3 762 × 393 × 393 ±5% 3 1 1 1 1 1 1 1 1 4 2 No No No
Stainless Steel 420, Bronze Infused – Polished Gold Binder Jetting 60% Stainless Steel, 40% Bronze Matrix 2.5 × 2.5 × 3 178 × 178 × 178 ±5% 3 1 1 1 1 1 1 1 1 4 2 No No No
Stainless Steel 420, Bronze Infused – Polished Nickel Binder Jetting 60% Stainless Steel, 40% Bronze Matrix 2.5 × 2.5 × 3 178 × 178 × 178 ±5% 3 1 1 1 1 1 1 1 1 4 2 No No No
Brass – Lightly Polished Lost Wax Casting 80% Cu, 15% Zn, 5% Sn 2.4 × 2.4 × 0.6 89 × 89 × 100 ±0.25mm and ≤2.5% shrinkage 0.3 0.6 0.6 0.8 1 0.4 0.4 0.35 0.35 4 2 No No No
Brass – Lightly Polished (Interlocking) Lost Wax Casting 80% Cu, 15% Zn, 5% Sn 2.4 × 2.4 × 0.6 75 × 75 × 40 ±0.25mm and ≤2.5% shrinkage 1 0.8 0.8 1.5 1.5 0.4 0.4 0.35 0.35 4 2 No ≤6 ≤6
Brass – Polished Lost Wax Casting 80% Cu, 15% Zn, 5% Sn 2.4 × 2.4 × 0.6 89 × 89 × 100 ±0.25mm and ≤2.5% shrinkage 0.3 0.8 0.8 0.8 1 0.4 0.4 0.35 0.35 4 2 No No No
Brass – Polished (Interlocking) Lost Wax Casting 80% Cu, 15% Zn, 5% Sn 2.4 × 2.4 × 0.6 75 × 75 × 40 ±0.25mm and ≤2.5% shrinkage 1 0.8 0.8 1.5 1.5 0.4 0.4 0.35 0.35 4 2 No ≤6 ≤6
Brass – Polished, 14k Gold Plated Lost Wax Casting 0.25 μm Electroplating 2.4 × 2.4 × 0.6 89 × 89 × 100 ±0.25mm and ≤2.5% shrinkage 0.3 0.8 0.8 0.8 1 0.4 0.4 0.35 0.35 4 2 No No No
Brass – Polished, 18k Gold Plated Lost Wax Casting 0.25 μm Electroplating 2.4 × 2.4 × 0.6 89 × 89 × 100 ±0.25mm and ≤2.5% shrinkage 0.3 0.8 0.8 0.8 1 0.4 0.4 0.35 0.35 4 2 No No No
Brass – Polished, Rose Gold Plated Lost Wax Casting 0.25 μm Electroplating 2.4 × 2.4 × 0.6 89 × 89 × 100 ±0.25mm and ≤2.5% shrinkage 0.3 0.8 0.8 0.8 1 0.4 0.4 0.35 0.35 4 2 No No No
Brass – Polished, Rhodium Plated Lost Wax Casting 0.25 μm Electroplating 2.4 × 2.4 × 0.6 89 × 89 × 100 ±0.25mm and ≤2.5% shrinkage 0.3 0.8 0.8 0.8 1 0.4 0.4 0.35 0.35 4 2 No No No
Bronze – Lightly Polished Lost Wax Casting 90% Cu, 10% Sn 2.4 × 2.4 × 0.6 89 × 89 × 100 ±0.25mm and ≤2.5% shrinkage 0.3 0.6 0.6 0.8 1 0.4 0.4 0.35 0.35 4 2 No No No
Bronze – Lightly Polished (Interlocking) Lost Wax Casting 90% Cu, 10% Sn 2.4 × 2.4 × 0.6 75 × 75 × 40 ±0.25mm and ≤2.5% shrinkage 1 0.8 0.8 1.5 1.5 0.4 0.4 0.35 0.35 4 2 No ≤6 ≤6
Bronze – Polished Lost Wax Casting 90% Cu, 10% Sn 2.4 × 2.4 × 0.6 89 × 89 × 100 ±0.25mm and ≤2.5% shrinkage 0.3 0.8 0.8 0.8 1 0.4 0.4 0.35 0.35 4 2 No No No
Bronze – Polished (Interlocking) Lost Wax Casting 90% Cu, 10% Sn 2.4 × 2.4 × 0.6 75 × 75 × 40 ±0.25mm and ≤2.5% shrinkage 1 0.8 0.8 1.5 1.5 0.4 0.4 0.35 0.35 4 2 No ≤6 ≤6
Copper – Lightly Polished Lost Wax Casting 100% Cu 2.4 × 2.4 × 0.6 89 × 89 × 100 ±0.25mm and ≤2.5% shrinkage 0.3 0.6 0.6 0.8 1 0.3 0.3 0.3 0.3 4 2 No No No
Copper – Polished Lost Wax Casting 100% Cu 2.4 × 2.4 × 0.6 89 × 89 × 100 ±0.25mm and ≤2.5% shrinkage 0.3 0.8 0.8 0.8 1 0.4 0.4 0.35 0.35 4 2 No No No
Silver – Lightly Polished Lost Wax Casting 92.5% Ag 2.4 × 2.4 × 0.6 89 × 89 × 100 ±0.25mm and ≤1.5% shrinkage 0.3 0.6 0.6 0.8 1 0.4 0.4 0.35 0.35 4 2 No No No
Silver – Lightly Polished (Interlocking) Lost Wax Casting 92.5% Ag 2.4 × 2.4 × 0.6 75 × 75 × 40 ±0.25mm and ≤2.5% shrinkage 1 0.8 0.8 1.5 1.5 0.4 0.4 0.35 0.35 4 2 No ≤6 ≤6
Silver – Polished Lost Wax Casting 92.5% Ag 2.4 × 2.4 × 0.6 89 × 89 × 100 ±0.25mm and ≤2.5% shrinkage 0.3 0.8 0.8 0.8 1 0.4 0.4 0.35 0.35 4 2 No No No
Silver – Polished (Interlocking) Lost Wax Casting 92.5% Ag 2.4 × 2.4 × 0.6 75 × 75 × 40 ±0.25mm and ≤2.5% shrinkage 1 0.8 0.8 1.5 1.5 0.4 0.4 0.35 0.35 4 2 No ≤6 ≤6
Silver – Extensively Polished Lost Wax Casting 92.5% Ag 2.4 × 2.4 × 0.6 89 × 89 × 100 ±0.25mm and ≤2.5% shrinkage 0.3 0.8 0.8 0.8 1 0.4 0.4 0.35 0.35 4 2 No No No
Silver – Aged Lost Wax Casting 92.5% Ag, Recesses Darkened 2.4 × 2.4 × 0.6 89 × 89 × 100 ±0.25mm and ≤2.5% shrinkage 0.3 0.8 0.8 0.8 1 0.4 0.4 0.35 0.35 4 2 No No No
Gold, 14k Yellow – Polished Lost Wax Casting 58% Au, 31% Cu, 10% Ag, 1% Zn 2.4 × 2.4 × 0.6 89 × 89 × 100 ±0.25mm and ≤2.5% shrinkage 0.3 0.8 0.8 0.8 1 0.4 0.4 0.35 0.35 4 2 No No No
Gold, 18k Yellow – Polished Lost Wax Casting 75% Au, 10% Cu, 15% Ag 2.4 × 2.4 × 0.6 89 × 89 × 100 ±0.25mm and ≤2.5% shrinkage 0.3 0.8 0.8 0.8 1 0.4 0.4 0.35 0.35 4 2 No No No
Gold, 14k Rose – Polished Lost Wax Casting 58% Au, 40% Cu, 1% Ag, 1% Zn 2.4 × 2.4 × 0.6 89 × 89 × 100 ±0.25mm and ≤2.5% shrinkage 0.3 0.8 0.8 0.8 1 0.4 0.4 0.35 0.35 4 2 No No No
Gold, 14k White – Polished Lost Wax Casting 58% Au, 24% Cu, 9% Zn, 9% Ni 2.4 × 2.4 × 0.6 89 × 89 × 100 ±0.25mm and ≤2.5% shrinkage 0.3 0.8 0.8 0.8 1 0.4 0.4 0.35 0.35 4 2 No No No
Platinum – Polished Lost Wax Casting 95% Pt, 5% Ru 2.4 × 2.4 × 0.6 89 × 89 × 100 ±0.25mm and ≤2.5% shrinkage 0.3 0.8 0.8 0.8 1 0.4 0.4 0.35 0.35 4 2 No No No
Nylon PA 2200 – Matte White Selective Laser Sintering (SLS) X + Y + Z ≥ 7.5 650 × 350 × 550 ±0.15mm and ±0.15% of longest axis 0.5 0.7 0.7 0.8 1 0.2 0.5 0.2 0.5 4 2 No Yes Yes
Nylon PA 2200 – Matte Black Selective Laser Sintering (SLS) Dyed X + Y + Z ≥ 7.5 180 × 230 × 320 ±0.15mm and ±0.15% of longest axis 0.5 0.7 0.7 0.8 1 0.2 0.5 0.2 0.5 4 2 No Yes Yes
Nylon PA 2200 – Smooth White Selective Laser Sintering (SLS) X + Y + Z ≥ 25 and axes must be ≥ 2.5 200 × 150 × 150 ±0.15mm and ±0.15% of longest axis 0.5 0.7 0.7 0.9 1 0.2 0.5 0.2 0.5 4 2 No Yes Yes
Nylon PA 2200 – Smoothest White Selective Laser Sintering (SLS) X + Y + Z ≥ 25 and axes must be ≥ 2.5 200 × 150 × 150 ±0.15mm and ±0.15% of longest axis 0.5 0.7 0.7 0.9 1 0.2 0.5 0.2 0.5 4 2 No Yes Yes
Nylon PA 2200 – Smoothest Black Selective Laser Sintering (SLS) Dyed X + Y + Z ≥ 25 and axes must be ≥ 2.5 200 × 150 × 150 ±0.15mm and ±0.15% of longest axis 0.5 0.7 0.7 0.9 1 0.2 0.5 0.2 0.5 4 2 No Yes Yes
Nylon PA 2200 – Smooth Blue Selective Laser Sintering (SLS) Dyed X + Y + Z ≥ 25 and axes must be ≥ 2.5 200 × 150 × 150 ±0.15mm and ±0.15% of longest axis 0.5 0.7 0.7 0.9 1 0.2 0.5 0.2 0.5 4 2 No Yes Yes
Nylon PA 2200 – Smooth Green Selective Laser Sintering (SLS) Dyed X + Y + Z ≥ 25 and axes must be ≥ 2.5 200 × 150 × 150 ±0.15mm and ±0.15% of longest axis 0.5 0.7 0.7 0.9 1 0.2 0.5 0.2 0.5 4 2 No Yes Yes
Nylon PA 2200 – Smooth Red Selective Laser Sintering (SLS) Dyed X + Y + Z ≥ 25 and axes must be ≥ 2.5 200 × 150 × 150 ±0.15mm and ±0.15% of longest axis 0.5 0.7 0.7 0.9 1 0.2 0.5 0.2 0.5 4 2 No Yes Yes
Nylon PA 2200 – Smooth Orange Selective Laser Sintering (SLS) Dyed X + Y + Z ≥ 25 and axes must be ≥ 2.5 200 × 150 × 150 ±0.15mm and ±0.15% of longest axis 0.5 0.7 0.7 0.9 1 0.2 0.5 0.2 0.5 4 2 No Yes Yes
Nylon PA 2200 – Smooth Yellow Selective Laser Sintering (SLS) Dyed X + Y + Z ≥ 25 and axes must be ≥ 2.5 200 × 150 × 150 ±0.15mm and ±0.15% of longest axis 0.5 0.7 0.7 0.9 1 0.2 0.5 0.2 0.5 4 2 No Yes Yes
Nylon PA 2200 – Smooth Purple Selective Laser Sintering (SLS) Dyed X + Y + Z ≥ 25 and axes must be ≥ 2.5 200 × 150 × 150 ±0.15mm and ±0.15% of longest axis 0.5 0.7 0.7 0.9 1 0.2 0.5 0.2 0.5 4 2 No Yes Yes
Nylon PA 2200 – Smooth Pink Selective Laser Sintering (SLS) Dyed X + Y + Z ≥ 25 and axes must be ≥ 2.5 200 × 150 × 150 ±0.15mm and ±0.15% of longest axis 0.5 0.7 0.7 0.9 1 0.2 0.5 0.2 0.5 4 2 No Yes Yes
Nylon PA11 – Matte White Selective Laser Sintering (SLS) Flexible, High Elongation at Break X + Y + Z ≥ 7.5 290 × 290 × 600 ± 0.2mm 1 0.4 0.5 0.7 1 0.4 0.4 0.4 0.4 4 2 No Yes Yes
Nylon PA12 – Matte Gray Multi Jet Fusion 7x 7x 7 & X + Y + Z > 9 284 x 380 x 380 ±0.25mm and ±0.1% of the length 0.6 0.4 0.5 0.8 0.9 0.2 0.4 0.2 0.4 4 2 No Yes No
Nylon PA12 – Matte Black Multi Jet Fusion 7x 7x 7 & X + Y + Z > 9 210 x 210 x 360 ±0.25mm and ±0.1% of the length 0.6 0.4 0.5 0.8 0.9 0.2 0.4 0.2 0.4 4 2 No Yes No
Nylon PA12 – Smooth Black Multi Jet Fusion 10 x 10 x 10 284 x 380 x 380 ±0.2mm to ±0.4% 5 1.5 1.5 1.5 1.5 0.5 0.5 0.4 0.4 10 8 No Yes No
Nylon PA12, Glass-Filled – Matte Gray Multi Jet Fusion 40% Glass-Filled X + Y + Z > 9 284 x 380 x 380 ±0.25mm and ±0.2% of the longest axis 0.6 0.75 1 1 1 0.5 0.5 0.5 0.5 4 2 No Yes No
Nylon PA12, Glass-Filled – Matte Dark Gray Multi Jet Fusion 40% Glass-Filled X + Y + Z > 9 284 x 380 x 380 ±0.25mm and ±0.2% of the longest axis 0.6 0.75 1 1 1 0.5 0.5 0.5 0.5 4 2 No Yes No
Acrylic Photopolymer – Smooth Frosted Clear Material Jetting Fine Detail X + Y + Z > 12 282 × 181 × 150 ±0.7mm for every 100mm 0.05 0.3 0.6 0.6 0.8 0.1 0.1 0.1 0.1 N/A 4 No Yes No
Acrylic Photopolymer – Smoothest Frosted Clear Material Jetting Fine Detail X + Y + Z > 12 282 × 181 × 100 ±0.7mm for every 100mm 0.05 0.3 0.6 0.6 0.8 0.1 0.1 0.1 0.1 N/A 4 No Yes No
Acrylate Photopolymer – Smooth White Stereolithography Apparatus (SLA) High Resolution Accura Xtreme 200 3.8 x 3.8 x 3.8 609 x 711 x 457 ±0.2mm to ±0.4% 0.3 0.4 0.5 0.5 0.6 0.4 0.4 0.3 0.3 5 4 No No No
Acrylate Photopolymer – Smooth Gray Stereolithography Apparatus (SLA) High Resolution Accura Xtreme 3.8 x 3.8 x 3.8 482 x 482 x 558 ±0.2mm to ±0.4% 0.3 0.4 0.5 0.5 0.6 0.4 0.4 0.3 0.3 5 4 No No No
Acrylate Photopolymer – Smooth Semi-Clear Stereolithography Apparatus (SLA) High Resolution Accura 60 3.8 x 3.8 x 3.8 609 x 711 x 457 ±0.2mm to ±0.4% 0.3 0.4 0.5 0.5 0.6 0.4 0.4 0.3 0.3 5 4 No No No
TPU Thermoplastic Polyurethane – Matte Off-White Selective Laser Sintering (SLS) Rubber-Like 15 x 15 x 0.7 , X + Y + Z ≥ 15 200 x 200 x 200 ±0.7mm for every 100mm 1 0.7 0.7 1 2 1 1 1.5 1.5 4 3 No Yes Yes

Resources

Cost-Savings Guide
Manufacturing Quote
Download FREE CAD
Custom Vehicle Parts