Custom Injection Molding Services

Custom injection molding services for complex geometries and high-volume production. Trust a leading injection molding company with innovative solutions for your product.

  • Over 100 plastics and elastomeric materials available
  • No minimum order requirement
  • Quick quote response with free DFM feedback
  • Custom injection molding in 1 week for prototypes & parts

Capabilities of Injection Molding Services​

Our injection molding services offer precision and versatility, capable of producing both small prototypes and large production runs with a wide range of materials and tight tolerances.

services page njection mold tooling

Injection Mold Tooling

Create high-performance molds with our injection tooling and advanced CNC machines for consistent quality and precision.

service page plastic injection molding

Plastic Injection Molding

Achieve precise parts with tight tolerances using our advanced plastic injection molding service for consistent quality in high-volume production.

overmolding

Overmolding

Overmolding combines materials for improved performance or aesthetics, offering features like better grip or protection.

insert molding

Insert Molding

Insert molding embeds metal or components into plastic, ideal for complex assemblies and reducing post-production integration of fasteners, bushings, or electronics.

Why Choose Us

Unbeatable Lead Times

Accelerate product development with injection-molded parts ready for shipping in as little as 1 week.

DFM Feedback

Receive real-time pricing and design analysis to identify potential molding challenges in your 3D CAD.

No MOQ Requirement

Order parts on demand, reducing costs for bridge production, emergencies, or product customization without minimum quantities.

Injection Molding Expertise

We guide you from prototyping to production, offering finishing options and inspection reports.

Our Injection Molding Factory

Our injection molding factory uses advanced technology to produce high-quality, precise parts for various applications.

Start A New Injection Molding Project

Unlock Precision and Quality with Our Injection Molding Services – Request Your Custom Quote Today!

Our Available Materials for Injection Molding Services​

Acrylonitrile Butadiene Styrene (ABS)

ABS is known for its toughness, impact resistance, and strength. It is ideal for durable products like automotive parts, electronics, and consumer goods. Its ability to be easily molded and polished makes it versatile.

Color: Various shades, typically white, black, or beige

Surface Finish: Matte or glossy; smooth, easily polished

Price: Moderate; great for high-volume production

Build Time: Fast due to easy flow during injection

Polypropylene (PP)

Polypropylene offers outstanding flexibility and chemical resistance, making it perfect for components exposed to harsh environments like automotive parts and chemical containers. Its durability ensures long-lasting performance under stress and exposure to chemicals.

Color : Naturally milky or translucent, color-matching available

Surface Finish : Smooth, flexible; resistant to chemicals

Price : Low cost; high-volume production material

Build Time: Fast, thanks to its low melting point

Polyethylene (PE)

PE is highly durable, offering excellent moisture resistance and impact strength. It is commonly used in piping, packaging, and containers due to its toughness, flexibility, and ability to withstand outdoor conditions without breaking down.

Color: Opaque, available in various colors

Surface Finish: Soft, waxy feel; smooth or semi-textured

Price: Low; ideal for large production runs

Build Time: Quick due to low viscosity

Polycarbonate (PC)

Polycarbonate provides exceptional clarity, toughness, and resistance to impact, making it ideal for protective gear, transparent enclosures, and optical lenses. Its ability to maintain optical quality even under stress makes it a favorite in high-performance applications.

Color: Naturally transparent, can be color-tinted

Surface Finish: High-gloss or matte; easily polished for clarity

Price: Higher due to strength and optical qualities

Build Time: Moderate due to higher melt temperature

Nylon (Polyamide, PA)

Nylon is prized for its excellent wear resistance, tensile strength, and low friction properties. It is widely used in mechanical parts such as gears, bearings, and bushings where high durability and abrasion resistance are essential.

Color: Off-white or milky; can be dyed

Surface Finish: Smooth, glossy; highly abrasion-resistant

Price: Moderate; varies with reinforcement

Build Time: Moderate; high-temperature required

Polystyrene (PS)

Polystyrene is lightweight, rigid, and economical, making it ideal for disposable products, packaging, and casings. It is also widely used in insulating applications due to its excellent thermal properties and ease of molding into complex shapes.

Color: Clear, white, or color-matched

Surface Finish: Smooth, rigid, with slight sheen

Price:  Low; one of the most affordable plastics

Build Time: Fast due to low melting temperature

Polyethylene Terephthalate (PET)

PET combines strength, moisture resistance, and durability, making it the go-to material for packaging, especially in the food and beverage industry. Its clarity and barrier properties also make it a popular choice for bottles and transparent containers.

Color: Transparent; can be opaque with colorants

Surface Finish: Smooth, glossy; moisture-resistant

Price: Moderate; cost-effective for specific uses

Build Time: Quick, thanks to superior flow properties

Materials for Injection Molding Services

Our injection molding materials provide a range of properties, from strength and flexibility to durability. Each material is chosen to meet the unique demands of your project for reliable, high-quality results.

Acrylonitrile Butadiene Styrene (ABS)

ABS is known for its toughness, impact resistance, and strength. It is ideal for durable products like automotive parts, electronics, and consumer goods. Its ability to be easily molded and polished makes it versatile.

  • Color: Various shades, typically white, black, or beige
  • Surface Finish: Matte or glossy; smooth, easily polished
  • Price: Moderate; great for high-volume production
  • Build Time: Fast due to easy flow during injection
injection molding pp

Polypropylene (PP)

Polypropylene offers outstanding flexibility and chemical resistance, making it perfect for components exposed to harsh environments like automotive parts and chemical containers. Its durability ensures long-lasting performance under stress and exposure to chemicals.

  • Color: Naturally milky or translucent, color-matching available
  • Surface Finish: Smooth, flexible; resistant to chemicals
  • Price: Low cost; high-volume production material
  • Build Time: Fast, thanks to its low melting point
injection molding metals pe

Polyethylene (PE)

PE is highly durable, offering excellent moisture resistance and impact strength. It is commonly used in piping, packaging, and containers due to its toughness, flexibility, and ability to withstand outdoor conditions without breaking down.

  • Color: Opaque, available in various colors
  • Surface Finish: Soft, waxy feel; smooth or semi-textured
  • Price: Low; ideal for large production runs
  • Build Time: Quick due to low viscosity
injection molding pc

Polycarbonate (PC)

Polycarbonate provides exceptional clarity, toughness, and resistance to impact, making it ideal for protective gear, transparent enclosures, and optical lenses. Its ability to maintain optical quality even under stress makes it a favorite in high-performance applications.

  • Color: Naturally transparent, can be color-tinted
  • Surface Finish: High-gloss or matte; easily polished for clarity
  • Price: Higher due to strength and optical qualities
  • Build Time: Moderate due to higher melt temperature
injection molding pa

Nylon (Polyamide, PA)

Nylon is prized for its excellent wear resistance, tensile strength, and low friction properties. It is widely used in mechanical parts such as gears, bearings, and bushings where high durability and abrasion resistance are essential.

  • Color: Off-white or milky; can be dyed
  • Surface Finish: Smooth, glossy; highly abrasion-resistant
  • Price: Moderate; varies with reinforcement
  • Build Time: Moderate; high-temperature required
injection molding metals ps

Polystyrene (PS)

Polystyrene is lightweight, rigid, and economical, making it ideal for disposable products, packaging, and casings. It is also widely used in insulating applications due to its excellent thermal properties and ease of molding into complex shapes.

  • Color: Clear, white, or color-matched
  • Surface Finish: Smooth, rigid, with slight sheen
  • Price: Low; one of the most affordable plastics
  • Build Time: Fast due to low melting temperature
injection molding metals pet

Polyethylene Terephthalate (PET)

PET combines strength, moisture resistance, and durability, making it the go-to material for packaging, especially in the food and beverage industry. Its clarity and barrier properties also make it a popular choice for bottles and transparent containers.

  • Color: Transparent; can be opaque with colorants
  • Surface Finish: Smooth, glossy; moisture-resistant
  • Price: Moderate; cost-effective for specific uses
  • Build Time: Quick, thanks to superior flow properties

Injection Molding Surface Finishes (SPI Finish)

Our injection molding finishes ensure your product has the right texture, from high-gloss to matte or textured surfaces, enhancing both appearance and functionality.

A-Finishes (High Gloss/Polished)

Finish Description
A-1 A-1 Mirror finish, highly polished (diamond buffing
A-2 A-2 High gloss, smooth finish (diamond buffing)
A-3 A-3 Semi-gloss, smooth finish (diamond buffing)
B-1 B-1 Fine texture, medium polish (#600 grit sandpaper)
B-2 B-2 Medium texture, semi-gloss finish (#400 grit sandpaper)
B-3 B-3 Coarse texture, semi-gloss finish (#320 grit sandpaper)
C-1 C-1 Fine matte finish (#600 grit stone)
C-2 C-2 Medium matte finish (#400 grit stone)
C-3 C-3 Coarse matte finish (#320 grit stone)
D-1 D-1 Fine bead blast texture
D-2 D-2 Medium bead blast texture
D-3 D-3 Coarse bead blast texture

Surface Finishes

Selecting the right surface finish can boost the look, strength, and performance of your sheet metal parts. Here’s a quick look at some of our most popular finishes:

Color Description
Materials for CNC Machining Services As-Fabricated Finish Natural Metal The raw finish is directly after fabrication. All Metals
Materials for CNC Machining Services Powder Coating Various Colors Durable coating providing corrosion resistance and color. Aluminum, Steel, Copper
Materials for CNC Machining Services Anodizing Clear or Colored Electrochemical process that adds a corrosion-resistant layer. Aluminum, Titanium
Materials for CNC Machining Services Electroplating Various Metallics Coating of metal with another to enhance corrosion resistance or appearance. Steel, Copper, Nickel
Materials for CNC Machining Services Sand Blasting Matte Creates a uniform, matte surface by blasting with sand particles. Stainless Steel, Aluminum
Materials for CNC Machining Services Polishing Shiny Metallic Buffing surface to a mirror-like shine. Stainless Steel, Brass, Copper
Materials for CNC Machining Services Passivation Natural Metal Chemical process to enhance corrosion resistance. Stainless Steel

Get Your Injection Molding Parts Today

Unlock Precision and Quality with Our Injection Molding Services – Request Your Custom Quote Today!

Plastic Injection Molding Services: Parts Gallery

Check out our molded components across different industries and explore the innovative designs and craftsmanship that can meet your manufacturing needs.

Injection Molding Capabilities​

Delivering high-precision and efficient production—our injection molding capabilities ensure consistent, high-quality parts for diverse applications.

Service Details
Lead Time It starts in 7 business days, with quick quotes and feedback on how to design for manufacturing (DFM).
Production Options Both domestic and international
Materials A wide range of plastics available, including custom sourcing and matching; refer to the materials list below.
Machines Available Single, multi-cavity, and family molds; press tonnage ranging from 50 to over 3,700; automated side actions or manual core loading.
Inspection and Certification Options Includes IS0 9001, IS0 13485, IS0 16949, ISO 14001, and D-U-N-S®, GS, CE, EMC, RoHS, PaHS, UL/ETL, SAA, PSE Customer-owned molds with maintenance services included.
Tool Ownership Customer-owned molds with maintenance services included.
Mold Cavity Tolerances ±0.005" for mold machining, plus an additional ±0.002" per inch to account for shrinkage.
Part to Part Repeatability ±0.004" or tighter.
Critical Feature Tolerances Tighter tolerances are available upon request but may increase tooling costs due to extra sampling and refinement. GS Proto will mill critical features to a steel-safe condition.
Available Mold Types Steel and aluminum; production grades vary from Class 105 (prototype mold) to Class 101 (high-production mold). GS Proto typically manufactures Class 104, 103, and 102 molds.

Injection Molding Surface Finishes (SPI Finish)

Our injection molding finishes ensure your product has the right texture, from high-gloss to matte or textured surfaces, enhancing both appearance and functionality.

A-Finishes (High Gloss/Polished)

Finish Description Application/Materials
placeholder.png A-1 Mirror finish, highly polished (diamond buffing ABS, PC, PS
placeholder.png A-2 High gloss, smooth finish (diamond buffing) ABS, PC, PS
placeholder.png A-3 Semi-gloss, smooth finish (diamond buffing) ABS, PC, PS

B-Finishes (Semi-Gloss)

Finish Description Application/Materials
placeholder.png B-1 Fine texture, medium polish (#600 grit sandpaper) PP, PE, Nylon
placeholder.png B-2 Medium texture, semi-gloss finish (#400 grit sandpaper) PP, PE, Nylon
placeholder.png B-3 Coarse texture, semi-gloss finish (#320 grit sandpaper) PP, PE, Nylon

C-Finishes (Matte)

Finish Description Application/Materials
placeholder.png C-1 Fine matte finish (#600 grit stone) PP, PE, Nylon
placeholder.png C-2 Medium matte finish (#400 grit stone) PP, PE, Nylon
placeholder.png C-3 Coarse matte finish (#320 grit stone) PP, PE, Nylon

D-Finishes (Textured)

Finish Description Application/Materials
placeholder.png D-1 Fine bead blast texture ABS, PP, PE
placeholder.png D-2 Medium bead blast texture ABS, PP, PE
placeholder.png D-3 Coarse bead blast texture ABS, PP, PE

Tolerance for Injection Moulding Services

Ensuring tight tolerances for precision and reliability in every part we manufacture.

Sample ID Heading 1 Heading 2
Sample #1 Row 1, Content 1 Row 1, Content 2
Sample #2 Row 2, Content 1 Row 2, Content 2
Sample #3 Row 3, Content 1 Row 3, Content 2

How to Work with Our Injection Moulding Services

Streamline your project with our easy four-step process! Upload your CAD design, receive a quote, confirm your order, and watch as we bring your vision to life with precision injection molding. 

1
Upload CAD Design
Submitting your 3D CAD design on our form. We support a wide range of file formats, making it easy to provide your project specifications.
2
Quote & DFM Analysis
Once your design is uploaded, get a quote and DFM analysis report for streamlined production and reduced manufacturing issues
3
Order Confirmation
Review and approve the quote and DFM analysis report to confirm your order and kickstart production
4
Start Production
With everything in place, we move into the production phase and keep you informed every step of the way

FAQs

What is the hourly rate for injection molding?

Injection molding hourly rates typically range from $20 to $150, depending on part complexity and machine type.

What is cheaper than injection molding?

3D printing, vacuum casting, and CNC machining can be cheaper alternatives for low-volume or prototype parts.

How much does injection molding cost per part?

Injection molding costs per part range from a few cents to several dollars, depending on factors like material, complexity, and production volume.

What are the advantages of injection molding?

Injection molding has many advantages but the one that stand out the most is the support for mass production of parts. This in turn reduces the cost of production due to the lower cost per unit part as production increases.

Additionally, it is compatible with parts with complex geometries, providing consistency during production.

What are common defects in injection molding?

Common defects you can encounter during injection molding include the following: 

  • Warping
  • Sink marks
  • Flashes
  • Short shots.

These injection molding defects can occur due to  improper mold design, wrong material choice, wrong tooling, or the use of the wrong injection molding technique

How long does it take to produce injection-molded parts?

Injection molding typically takes 2-8 weeks. But GS Proto can basically guarantee completion within a week.

Other factors that can alter the production time include the parts design complexity, size, injection service provider capabilities, and the production volume. 

What is the cost of injection molding?

GS Proto offers a injection molding services at a competitive price. 

However, you need to consider factors like mold complexity, material selection, production capability, and production volume during budgeting.

The production volume is a very important factor to consider because the higher the number of parts produced the lower the cost per unit part.

What is the lifespan of an injection mold?

The injection mold longevity depends on the material used in making it.

There are two common materials: steel and aluminum. Steel has a higher longevity and a single steel mold can produce thousands to millions of parts hence its use in high volume production. On the other hand, aluminum molds are less durable and suitable for hundreds to thousand runs. 

What is the minimum order quantity for injection molding?

GS Proto has no minimum order requirement. We value every designer and engineer who invests in their dreams and ideas.

Can injection molding accommodate design changes after mold creation?

Yes, it is possible to accommodate some design changes after mold creation. However, this will come at an additional cost.

Depending on the changes required, it might need us to make a new mold.

Because it can lead to wastage of resources, ensure you communicate with us efficiently to reduce the need for changes and the associated cost.

Start Your New Injection Molding Quote

Unlock Precision and Quality with Our Injection Molding Services – Request Your Custom Quote Today!

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