Custom Plastic Injection Molding Service

Access top-tier plastic injection molding services for your customized prototypes and production components. Receive injection-molded parts known for their impeccable quality, excellent finishes, and high dimensional stability, all at competitive prices.

Common applications for plastic injection molding:

  • Low-High volume production
  • Bridge tooling
  • Pilot runs
  • Functional testing and prototyping

Our plastic injection molding process delivers custom prototypes and end-use production components with lead times as short as 1-3 day. We employ cost-effective aluminum molds that expedite manufacturing cycles and maintain an inventory of approximately 100 diverse thermoplastic resins.

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Plastic Injection Molding Capabilities

ServiceDetails
Lead TimeStarts at 1-3 business days, including fast quote responses with design-for-manufacturing (DFM) feedback
Production OptionsDomestic and international
MaterialsMost plastics, including custom sourcing and matching; We have wide selection of more than 100 thermoplastic and thermoset materials.
Machines AvailableSingle, multi-cavity, and family molds; 50 to 1,100+ press tonnage; side actions including hand-loaded cores.
Inspection and Certification OptionsIncludes FAI and PPAP.
Tool OwnershipCustomer-owned with mold maintenance
Mold Cavity Tolerances+/- 0.005″ when machining the mold and an additional +/- 0.002″ per inch when calculating for shrink rate
Part to Part Repeatability+/- 0.004″ or less
Critical Feature TolerancesTighter tolerances can be requested and may increase the cost of tooling because of additional sampling and grooming. Scojet will mill to a steel-safe condition on critical features.
Available Mold TypesSteel and aluminum; Production grades range from Class 105, a prototype mold, to Class 101, an extremely high production mold. Scojet typically produces Class 104, 103, and 102 tools.

Tolerances: Typically, Scojet can maintain a machining tolerance of +/- 0.003 in. (0.08mm) with an included resin tolerance that can be greater than but no less than +/- 0.002 in./in. (0.05mm/mm).

Plastic Injection Molding Materials

Thermoplastic Materials

We have wide selection of more than 100 thermoplastic and thermoset materials. And if you’re looking for alternative material options, check out our guide to resin substitutes for ABS, PC, PP, and other commonly molded plastics.

The list below is general capabilities and is not comprehensive, this is best used as guide to select a base material. Final selection should be made with your tool and mold engineer. 

Click on red link below to expand and see more information about each material.

Quick Material Performance Guide
PropertyMaterials
Impact resistantABS, PMMA, PVC, PE, PC
Wear-resistantPOM, PEEK, UHMW
Dimensional stabilityABS, PBT, HIPS, PPS
Chemical resistancePEEK, PP, PBT, PE, LDPE, PA
Rubber likeTPU, TPE, Silicone
Cost-efficientPP, HDPE, LDPE
CosmeticABS, PC, HIPS

Common Injection Mold Finishes
StandardFinish (Grade)Finish(Type)Finishing MethodTypical Surface Roughness
SPI A-1GlossySuperGrade #3, 6000-Grit Diamond0.012 - 0.025 µm (0.5 - 1.0 µin)
SPI A-2GlossyHighGrade #6, 3000-Grit Diamond0.025 - 0.05 µm (1.0 - 2.0 µin)
SPI A-3GlossyNormalGrade #15, 1200-Grit Diamond0.05 - 0.10 µm (2.0 - 4.0 µin)
SPI B-1Semi-GlossyFine600-Grit Paper0.05 - 0.10 µm (2.0 - 4.0 µin)
SPI B-2Semi-GlossyMedium400-Grit Paper0.10 - 0.20 µm (4.0 - 8.0 µin)
SPI B-3Semi-GlossyNormal320-Grit Paper0.20 - 0.30 µm (8.0 - 12.0 µin)
SPI C-1MatteFine600-Grit Stone0.35 - 0.40 µm (14 - 16 µin)
SPI C-2MatteMedium400-Grit Stone0.40 - 0.50 µm (16 - 20 µin)
SPI C-3MatteNormal320-Grit Stone0.50 - 0.60 µm (20 - 24 µin)
SPI D-1TexturedSatinDry Blast Glass Bead #110.80 - 1.00 µm 32 - 40 µin
SPI D-2TexturedDullDry Blast #240 Aluminum Oxide1.00 - 2.00 µm 40 - 80 µin
SPI D-3TexturedRoughDry Blast #24 Aluminum Oxide2.00 - 5.00 µm (80 - 200 µin)
SM-F0

Matte

Non-Cosmetic Finish

Course Machined/EDM Finish

6.3 - 25.0 µm (250 - 1000 µin)

SM-F1

Matte

Medium-Cosmetic Finish

Medium Machined/EDM

1.6 - 6.3 µm (63 - 250 µin)

SM-F2

Matte

Low-Cosmetic Finish

Fine Machining/EDM

0.4 - 1.6 µm (16 - 63 µin)

SM-T1

Textured

Light Bead Blast Texture

Light Texture

0.8 - 1.6 µm 32 - 63 µin

SM-T2

Textured

Medium Bead Blast Texture

Medium Texture

1.6 - 3.2 µm 63 - 125 µin