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:

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.

Start a Custom Plastic Injection Molding Services Quote

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. ISO 9001, AS9100, ISO 13485, UL, ITAR, and ISO 7 and 8 Medical Clean Room molding.
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).

Custom 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.

High-strength general-purpose engineering plastic, used for many commercial products.

A material very similar to ABS with higher resistance to fading and better suited for outdoor use.

Typically used in eyeglasses and film, CA is a flexible clear material that can be used in food contact.

Excellent strength-to-weight ratio and chemical resistance. It is often used for fuel tanks, connector insulators, and food containers. HDPE is also used in outdoor equipment like playgrounds.

LCP has mechanics even at elevated temperatures as well as low dielectric constants. This material provides exceptional features for micromolding and thin walled components. LCP is popular for electrical connectors and interconnects as well as medical devices.

A flexible and tough material with lower density versus HDPE. LDPE does not react to acids, bases, or alcohols. Useful for trays, snap lids, and general-purpose containers.

Offers increased mechanical strength, rigidity, good stability under heat, and/or chemical resistance.

Offers increased mechanical strength, rigidity, good stability under heat, and/or chemical resistance.

Often combined with infills such as glass or mineral fibers, PARA creates rigid parts with low creep and a slower rate of water absorption than nylon (PA). PARA is excellent for structural components in handheld and medical electronics.

A common electronic insulator with a polyester base. Highly used in automotive as a longer-wear alternative to nylon.

A clear or colored, lightweight, glass-like plastic that is heavily used across multiple industries. PC is impact resistant, holds great feature detail, and can be used for safety equipment, lenses, electronic devices, and much more.

One of the most common plastics used in the world, PE has high ductility, abrasion resistance, and chemical resistance. PE is often described by its molecular weight, such as UHMW PE (ultra-high molecular weight), LDPE (low density), or HDPE (high density). PE is used in packaging, tubing, films, bottles, and more.

The best of both PC and ABS. Higher-strength engineering thermoplastic with slightly more flexibility than standard polycarbonate.

A tough and rigid material resistant to lubricants, solvents, and cleaning agents. Very common in electronic enclosures.

A blend of PC and PET provides tough and chemically resistant results and can be used as an alternate to PC-ABS. It endures harsh solvents and cleaners, making it excellent for sports equipment and healthcare applications.

A thermoplastic polyester that typically outperforms PET due to lower moisture absorption and better environmental stability. PCT is often used for connectors and switches.

Offering excellent tensile strength that surpasses most plastics, PEEK is often used as a lightweight substitute for metal parts in high-temperature, high-stress applications. PEEK resists chemicals, wear, and moisture.

Known best for its extremely high heat and flame resistance, PEI is used for many medical applications and is more affordable than PEEK.

A resin blend of the polyolefin’s polypropylene and polyethylene.

A resin blend of the polyethylene and polystyrene.

A rigid, transparent plastic that is chemically inert, biocompatible, and sterilizable. PES is suitable for food-contact devices such as coffee machine components as well as aerospace and automotive where chemical exposure is high.

Also abbreviated PETE, this is a clear, strong, and lightweight PE resin heavily used in food packaging, soda bottles, jars, and more. The material is food-safe. PET is recyclable with a resin code of 1.

A biodegradable and renewable plastic. PLA has a relatively low glass transition temperature and is common in short-use applications.

A clear glass-like plastic. Good wear and tear properties. Great for outdoor use.

Good moisture resistance, high wear-resistance, and low friction.

Polypropylene has excellent electrical properties and little or no moisture absorption. It carries light loads for a long period in varying temperatures. It can be molded into parts requiring chemical or corrosion resistance.

A subset of nylons (polyamide) that typically exhibit a higher melting point and lower moisture absorption. PPA is typically used in automotive and industrial applications because it can withstand harsh chemicals. PPA is good for fuel and fluid manifolds and headlight housings.

A high-performance thermoplastic with extreme resistance to solvents.

A clear, hard, and brittle material widely used for food packaging, clamshell containers, and even disposable cutlery.
PS-PPE (polystyrene-polyphenyl ethers, Noryl)Exhibiting high heat and flame resistance, PPE-PS has high stiffness and tensile strength even at elevated temperatures.

A rigid, stiff, and transparent plastic which is a higher-performance alternative to polycarbonate.

A rigid, general-use plastic that is common in plumbing, non-food packaging, and trimming.

A chemically inert, high-temperature material. Due to its low friction, PVDF is used in plumbing parts, bearings, chemical handling, electrical wire insulation, and tubing.

A polystyrene that is heat resistant and transparent. Due to its relationship with polystyrene, SAN is low cost and has enhanced clarity and shine. SAN is common in household goods, door handles, and kitchenware.

A flexible plastic with good chemical resistance but lower temperature resistance compared to PP.

A tough, highly abrasion-resistant resin that bridges the gap between rubbers and plastics. TPUs can be formulated to be rigid or elastomeric. TPU exhibits a high flex before break and is ideal for wheels and door panels.

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

Custom Injection Mold Finishes

FINISHDESCRIPTION
PM-F0non-cosmetic, finish to Protolabs’ discretion
PM-F1low-cosmetic, most toolmarks removed
PM-F2non-cosmetic, EDM permissible
SPI-C1600 grit stone, 10-12 Ra
PM-T1SPI-C1 + light bead blast
PM-T2SPI-C1 + medium bead blast
SPI-B1600 grit paper, 2-3 Ra
SPI-A2grade #2 diamond buff, 1-2 Ra
FINISHDESCRIPTION
PM-F0non-cosmetic, finish to Protolabs’ discretion
PM-F1low-cosmetic, most toolmarks removed
PM-F2non-cosmetic, EDM permissible
SPI-C1600 grit stone, 10-12 Ra
PM-T1SPI-C1 + light bead blast
PM-T2SPI-C1 + medium bead blast
SPI-B1600 grit paper, 2-3 Ra
SPI-A2grade #2 diamond buff, 1-2 Ra

1. Standard Finish

Moldmaker’s choice of finish. Typically SPI B-2, depending on geometry and drafts. Interior, non-cosmetic faces, are typically as-machined.

2. SPI Finishes

Range of Society of Plastics Industry (SPI) finishes from Grade 3 diamond / high polish to 320 stone low polish. Finishes include: SPI A-1, SPI A-2, SPI A-3, SPI B-1, SPI B-2, SPI B-3, SPI C-1, SPI C-2, SPI C-3, SPI D-1, SPI D-2, and SPI D-3

3. Other Textures - VDI

VDI 3400 Surface Finish (commonly known as VDI surface finish) refers to the mold texture standard set by Verein Deutscher Ingenieure (VDI), the Society of German Engineers. This is mainly processed by EDM machining, producing fine to coarse matte finishes.

Gallery of Plastic Injection Molded

Get In Touch with us