CNC Machining parts prototype to mass
production one-stop manufacturer
Mold making
Injection Molding Services
Fast. Precise. Reliable. Get plastic or metal custom injection molded parts—from prototypes to production. Upload your design for a free quote!
30t-1800t
Injection molding machines
1pc
No MOQ
10K+
Injection moldings made monthly
100+
Plastic & metal materials
Trusted by companies like
Why Choose JTC for Custom Injection Molding?
One-stop Services
As a trusted injection molding supplier, 3ERP offers end-to-end solutions—from custom mold tooling to final part production. Our streamlined process minimizes communication delays and reduces lead times, ensuring faster and more efficient project delivery.
Flexible Solutions
Our team of experienced molding specialists can guide you to the right solution, whether you need rapid aluminum tooling for quick prototyping or a robust, long-lasting mold for high-volume production.
No MOQ
3ERP doesn’t require a minimum order quantity, giving you full flexibility to order exactly what you need. This makes us a cost-effective supplier for both low-volume and prototype production, without large upfront commitments.
Expert Review and Quotation
3ERP experts will review your design and provide a detailed quotation. Once quantities and pricing are confirmed, we quickly move into fabrication, ensuring accuracy and delivering fast lead times.
Our Injection Molding Capabilities
We are always ready for the challenges of all types of injection molding parts, such as tight tolerances, thin wall, small draft angle, undercuts, complex part geometry, non-defect surface finishes, etc.
Plastic Injection Molding Service
The most popular method for producing custom plastic parts, widely used in consumer products, automotive components, electronic enclosures, and more.
Liquid Silicone Rubber Molding Service
Liquid silicone rubber is inert, biocompatible, and perfect for durable, flexible parts, commonly found in medical devices, kitchenware, and consumer goods.
Metal Injection Molding Service
MIM offers a cost-effective solution for manufacturing small, detailed metal parts in large volumes, using less material than CNC machining.
Overmolding Service
Overmolding involves injecting a second material over a base part to create a composite. It is commonly used to enhance the part’s grip or flexibility.
Insert Molding Service
Insert molding embeds metal or plastic inserts during injection, creating integrated parts that improve structural integrity and save assembly time.
Quick-turn Injection Molding
Need parts fast? Get an instant quote and receive high-quality prototype parts in as little as 7 business days with 3ERP’s ultra-fast plastic injection molding service.
What is Injection Molding?
Injection molding is the process of injecting molten plastic or metal feedstock into a mold cavity, rapidly cooling it, then ejecting the solidified plastic part. It is the most widely used manufacturing process for plastic parts and the most affordable route to mass production.
Compared to other manufacturing methods like CNC machining or 3D printing, injection molding requires an upfront investment in tooling. However, once the mold is made, the cost per part drops significantly, especially in high-volume production. This makes injection molding a cost-effective solution for large-scale manufacturing.
Injection molding supports a wide variety of materials, including thermoplastics, thermosets, and even some metals. These materials can be easily combined with pigments and functional additives to customize both the appearance and performance of the final parts. Additionally, because the same mold is used throughout production, the process ensures high consistency and repeatability across every part.
Learn more about part design considerations in our Injection Molding Design Guide.
Manufacturing Process Steps for Injection Molded Parts
Our custom injection molding service typically involves the following steps:
Part Design
Uploading the 3D CAD files and 2D drawings of the desired part. Our engineers will review the design for Design for Manufacturability (DFM) and offer feedback to optimize it for the molding process.
Tooling Fabricatio
The mold is crafted from steel or aluminum, ensuring precision and repeatability. After the mold is created, T1 samples are produced and shipped for your approval. Once approved, the remaining parts are manufactured.
Material Selection
We work with you to select the right material based on your requirements. Pigments and functional additives can be blended to achieve the desired appearance and performance.
Injection Molding
Heat the material until it melts, then inject it under high pressure into the mold cavity. The molten plastic flows into the mold and forms the part.
Cooling and Ejection
The part cools and solidifies inside the mold. Once ready, ejector pins release the part, and the mold closes to begin the next cycle.
Finishing and Quality Control
Parts may undergo trimming, surface finishing, or light assembly as needed. We inspect each part to ensure it meets your specifications.
Match Your Project with the Right Mold Class
We fabricate injection molding tooling in aluminum for rapid, low-volume prototyping, and in tool steel for mass production. All molds follow SPI classification standards, which define tooling durability and expected cycle life — from Class 105 (prototype use) to Class 101 (high-volume production).Note: Tighter tolerances
| SPI Mold Classification | Production Cycles | Material | Application |
| 101 | 1,000,000+ | Hardened tool steel (e.g., H13, S7) | Mass production (e.g., automotive, appliances) |
| 102 | 1,000,000 | Hardened steel (primary), pre-hardened steel (e.g., P20) | Consumer goods, industrial parts |
| 103 | 500,000 | Pre-hardened steel (e.g., P20); high-grade aluminum for limited use | Electronics, medical devices |
| 104 | 100,000 | Aluminum (e.g., 7075) or Carbon Steel (e.g., 1045) | Low-volume manufacturing, prototyping |
| 105 | 500 | Soft aluminum, epoxy resins, or 3D-printed polymers | Rapid prototyping, short-run production |
Injection Molding Projects and Case Studies
Injection Molding is widely used for producing car parts, electronic enclosures, and kitchen appliances. With over 15 years of experience, JTC has successfully helped numerous companies turn their ideas into reality.
Case Study
Injection Molded Automotive Tail Light Lens
Material: Tooling: Aluminum; Injected parts: Custom material
Quantity: 300
Finishes: 600 x 400 x 150 mm
Challenges
We need to fabricate components like the housing, reflector, and lens on a tight timeline, with real materials for testing. 3D printing, CNC machining, and vacuum casting were unsuitable for this project.
Our Solution
Given the project requirements, mold tooling and injection molding were the only suitable solutions. We optimized the injection molding process by selecting the right materials and refining the mold design to reduce lead time. Aluminum molds were chosen for faster production, and cavity splitting improved efficiency.
Feedback
Hey guy, We delivered the final 55 full assemble sets to our customer yesterday. They are very happy with the result, and going to assemble them to the cars for testing soon. I would like to thank you for taking this tough project and manage to get everything done in such tight deadline. Please pass my thanks to your team. You are guys are the top gun!! I will be in touch with you when the next project coming. hopefully, we don’t have to deal a rush project like this time.
AL Lighting
Injection Molding Materials
A diverse range of industrial-grade materials is available for molded parts, providing great flexibility for both prototyping and production. Materials include common plastics such as ABS, PC, PP, and PA, as well as high-performance, temperature-resistant options like PEI and PPS.Learn more about material selection tips and recommendations on our material guide page.
Aluminum
Aluminum offers excellent machinability, corrosion resistance, and durability, making it ideal for various applications, such as aerospace, automotive parts, and outdoor components.
Color
■
Alloys
Aluminum 7075-T651 (3.4365 | AlZn5.5MgCu)Aluminum 6061-T6, 6082-T651 (3.2315 | AlSi1MgMn)Aluminum 6060 (3.3206 | AlMgSi), 5052 (3.3523 | AlMg2.5)Aluminum 2017 (3.1325), 2024
Available Finish
As machined, Anodizing, Powder coating, Electroplating, Painting, Sand blasting, Polishing
Price
$$
Lead Time
About 5 business days
Brass
Brass offers excellent machinability, a strong strength-to-weight ratio, corrosion resistance, and high conductivity, making it ideal for industrial applications requiring durability and precision.
Color
■
Alloys
H59, H62, C260, C360
Available Finish
As machined, Polishing, Sand blasting, Tumbling, Electropolish, Alodine, Heat treatment, Black oxidize, Electroless nickel, Chrome plating, Brushed finish
Price
$$$
Lead Time
About 5 business days
Copper
Copper is an efficient heat conductor with superior malleability, good corrosion resistance, and antimicrobial properties. It is ideal for electrical wiring, plumbing, and heat exchangers.
Color
■
Alloys
C11000, C10100, C10200
Available Finish
As machined, Polishing, Sand blasting, Tumbling, Electropolish, Alodine, Heat treatment, Black oxidize, Electroless nickel, Chrome plating, Brushed finish
Price
$$$
Lead Time
About 5 business days
Steel
Steel is a strong, versatile material with high tensile strength, ideal for structural components. It has various subtypes for specific applications.
Color
■
Alloys
Structured Steel, Mold Steel, Alloy Steel, Tool Steel, Bearing Steel, Carbon Steel
Available Finish
As machined, Electroplating, Passivation, Powder coating
Price
$$$
Lead Time
About 7 business days
Stainless steel
Stainless steel is a corrosion-resistant alloy of steel, chromium, and nickel. It’s ideal for kitchen appliances, medical equipment, and automotive parts.
Color
■
Alloys
Stainless steel 416 | 1.4005 | X12CrS13
Stainless steel 15-5 | 1.4545 | X5CrNiCu15-5
Stainless steel 301 | 1.4310 | X10CrNi18-8
Stainless steel 430 | 1.4016 | X6Cr17
Stainless steel 440C | 1.4125 | X105CrMo17
Stainless steel 420 | 1.4028 | X30Cr13
Stainless steel 304/304L | 1.4301/1.4307 | X5CrNi18-10/X2CrNi18-9
Stainless steel 2205 Duplex | 1.4462 | 2205 | X2CrNiMoN 22-5-3
Stainless Steel 17-4 PH | 1.4542 | X5CrNiCuNb16-4 – Annealed state
Stainless steel 303 | 1.4305 | X8CrNiS18-9
Stainless steel 316/316L | 1.4401/1.4404 | X5CrNiMo17-12-2/X2CrNiMo17-12-2
Available Finish
As machined, Electroplating, Passivation, Powder coating
Price
$$$
Lead Time
About 7 business days
Bronze
Bronze, an alloy of copper and tin, offers excellent durability and corrosion resistance, making it ideal for intricate, heavy-duty components and applications requiring strength.
Color
■
Alloys
C64200, C93200
Available Finish
As machined, Polishing, Sand blasting, Tumbling, Electropolish, Alodine, Heat treatment, Black oxidize, Electroless nickle, Chrome plating, Powder coating, Brushed finish
Price
$$$
Lead Time
About 5 business days
Titanium
Titanium offers a high strength-to-weight ratio, low thermal expansion, excellent corrosion resistance, and is biocompatible, making it ideal for aerospace, medical implants, and precision machining.
Color
■
Alloys
Titanium Grade 5 | 3.7164 | Ti6Al4V
Titanium Grade 2 | 3.7035
Titanium Grade 1 | 3.7025
Available Finish
As machined, Polishing, Sand Blasting, Tumbling, Electropolish, Alodine, Anodizing, Electroless nickel, Painting, Powder coating, Brushed finish
Price
$$$$$
Lead Time
About 8 business days
Magnesium
Magnesium is the lightest structural metal with a high strength-to-weight ratio, good machinability, and excellent vibration damping, ideal for lightweight applications.
Color
■
Alloys
AZ31B, AZ91D, AZ61B, ZK61M, MB15-RE
Available Finish
As machined, Polishing, Sand Blasting, Tumbling, Alodine, Heat treatment, Anodizing, Teflon coating, Electroless nickel, Painting, Powder coating, Electrophoresis
Price
$$$$$
Lead Time
About 8 business days
Zinc
Zinc is a corrosion-resistant metal often used for galvanizing steel, die casting, and making batteries, automotive parts, and hardware due to its durability and low cost.
Color
■
Alloys
ZAMAK 3, ZAMAK 5
Available Finish
As machined, Polishing, Sand Blasting, Tumbling, Alodine, Heat treatment, Anodizing, Teflon coating, Electroless nickel, Painting, Powder coating, Electrophoresis
Price
$$$
Lead Time
About 7 business days
Inconel
Inconel is a high-performance nickel-chromium alloy with excellent heat and corrosion resistance, commonly used in aerospace, gas turbines, and chemical processing equipment.
Color
■
Alloys
Inconel 601, Inconel 625, Inconel 718
Available Finish
As machined, Polishing, Sand Blasting, Tumbling, Alodine, Heat treatment, Anodizing, Teflon coating, Electroless nickel, Painting, Powder coating, Electrophoresis
Price
$$$$
Lead Time
About 7 business days
Invar
Invar is a nickel-iron alloy with extremely low thermal expansion, ideal for precision instruments, clocks, aerospace components, and applications requiring dimensional stability under temperature changes.
Color
■
Alloys
INVAR 32-5, INVAR 36, INVAR 42
Available Finish
As machined, Polishing, Sand Blasting, Tumbling, Alodine, Heat treatment, Anodizing, Teflon coating, Electroless nickel, Painting, Powder coating,
Price
$$$$
Lead Time
About 7 business days
ABS
ABS (Acrylonitrile Butadiene Styrene) is a versatile thermoplastic polymer known for its strength, durability, and ease of processing. It is widely used in applications such as automotive parts, consumer electronics, and medical equipment.
Color
■■
Alloys
ABS Beige(Natural), ABS Blac, ABS Black Antistati, ABS Milky Whit, ABS+PC Black, ABS+PC White
Available Finish
As machined, Sand blasting, Tumbling, Teflon coating, Painting, Powder coating, Electrophoresis
Price
$$
Lead Time
About 5 business days
PMMA
PMMA, also known as acrylic, is a transparent, lightweight plastic with excellent optical clarity, commonly used in lenses, displays, light covers, and signage.
Color
■■
Alloys
PMMA Black, PMMA Transparent, PMMA White
Available Finish
As machined, Sand blasting, Tumbling, Painting
Price
$
Lead Time
About 6 business days
PC
PC (Polycarbonate) is a strong, impact-resistant plastic with high transparency and heat resistance, widely used in eyewear lenses, electronics, automotive parts, and safety equipment.
Color
■■
Alloys
PC Black, PC Transparent, PC White, PC Yellowish White, PC+GF30 Black
Available Finish
As machined, Sand blasting, Tumbling, Painting, Brushed Finish
Price
$$
Lead Time
About 6 business days
POM
POM (Polyoxymethylene), also known as acetal or Delrin, is a strong, low-friction plastic ideal for gears, bearings, automotive parts, and precision mechanical components.
Color
■■
Alloys
Dark brown (coffee) POM 100AF, POM Black, POM Blue, POM White
Available Finish
As machined, Sand blasting, Tumbling, Painting
Price
$$
Lead Time
About 6 business days
PC GF30
PCGF30 is polycarbonate reinforced with 30% glass fiber, offering high strength, rigidity, and heat resistance—ideal for automotive, electrical housings, and structural components.
Color
■
Alloys
Available Finish
Price
$$
Lead Time
About 6 business days
PA(Nylon)
PA (Polyamide or Nylon) is a strong, wear-resistant plastic with good chemical resistance, commonly used in gears, bearings, automotive parts, and industrial machinery components.
Color
■
Alloys
PA(Nylon) Blue, PA6 (Nylon)+GF15 Black, PA6 (Nylon)+GF30 Black, PA66 (Nylon) Beige(Natural), PA66 (Nylon) Black
Available Finish
As machined, Sand blasting, Tumbling, Teflon coating, Painting, Powder coating
Price
$$
Lead Time
About 6 business days
PC+ABS
PC+ABS is a thermoplastic blend combining strength, impact resistance, and heat resistance, commonly used in automotive interiors, electronic housings, and consumer products.
Color
■
Alloys
Available Finish
Price
$$
Lead Time
About 6 business days
PA GF30
A glass-fiber reinforced plastic with high strength, excellent dimensional stability and heat resistance, perfect for demanding machining applications.
Color
■■
Alloys
Available Finish
Price
$$
Lead Time
About 6 business days
PP GF30
PP GF30 is polypropylene reinforced with 30% glass fiber, providing excellent heat resistance, low friction, and chemical resistance, commonly used in automotive, industrial, and electrical components.
Color
■
Alloys
Available Finish
Price
$$
Lead Time
About 6 business days
PP
PP (Polypropylene) is a versatile, lightweight, chemical-resistant plastic commonly used in packaging, automotive parts, textiles, and consumer goods due to its durability and flexibility.
Color
■
Alloys
Available Finish
Price
$$
Lead Time
About 6 business days
PTFE (Teflon)
PTFE (Polytetrafluoroethylene) is a non-stick, high-temperature resistant plastic with excellent chemical resistance, commonly used in gaskets, seals, bearings, and non-stick cookware.
Color
■
Alloys
Available Finish
Price
Lead Time
PEI
PEI (Polyetherimide) is a high-performance plastic known for its strength, heat resistance, and electrical properties, commonly used in aerospace, automotive, and medical devices.
Color
■
Alloys
Available Finish
Price
$$
Lead Time
About 6 business days
PS
PS (Polystyrene) is a rigid, lightweight plastic with good clarity, commonly used in disposable cutlery, food containers, CD cases, and packaging materials.
Color
■■
Alloys
Available Finish
Price
$$
Lead Time
About 6 business days
PPS
PPS (Polyphenylene Sulfide) is a high-performance, heat- and chemical-resistant plastic, ideal for industrial components requiring dimensional stability and durability
Color
■■
Alloys
Available Finish
Price
$$
Lead Time
About 6 business days
PE
PE (Polyethylene) is a lightweight, flexible, and chemical-resistant plastic widely used in household goods for its durability and versatility.
Color
■■
Alloys
Available Finish
Price
$$
Lead Time
About 6 business days
PPSU
PPSU (Polyphenylsulfone) is a tough, heat- and chemical-resistant plastic, ideal for medical devices, sterilizable components, plumbing fittings, and aerospace parts requiring high performance.
Color
■
Alloys
Available Finish
Price
$$
Lead Time
About 6 business days
PET
PET (Polyethylene Terephthalate) is a strong, lightweight plastic commonly used in food containers, textiles, and packaging for its durability and recyclability.
Color
■
Alloys
Available Finish
Price
$$
Lead Time
About 6 business days
PEEK
PEEK (Polyetheretherketone) is a high-performance, heat-resistant plastic with excellent chemical resistance, commonly used in aerospace, medical, and automotive parts.
Color
■
Alloys
Available Finish
Price
$$
Lead Time
About 6 business days
LDPE
LDPE (Low-Density Polyethylene) is a flexible, lightweight plastic with good chemical resistance, commonly used in containers, toys, and piping applications.
Color
■
Alloys
Available Finish
Price
$$
Lead Time
About 6 business days
G-10/FR4
G-10/FR4 is a fiberglass-reinforced epoxy laminate, offering excellent electrical insulation and strength, commonly used in circuit boards, electrical components, and structural applications.
Color
■■
Alloys
Available Finish
Price
$$
Lead Time
About 6 business days
HDPE
HDPE (High-Density Polyethylene) is a strong, durable plastic with excellent chemical resistance, commonly used in containers, pipes, toys, and industrial applications for its toughness.
Color
■■
Alloys
Available Finish
Price
$$
Lead Time
About 6 business days
PVC
PVC (Polyvinyl Chloride) is a durable, chemical-resistant plastic used in pipes, flooring, medical devices, and electrical insulation due to its versatility and low cost.
Color
■■
Alloys
Available Finish
Price
$$
Lead Time
About 6 business days
Wood
Wood is a natural material from trees. High-density woods are machinable. It’s a common material for consumer products such as furniture and artwork.
Color
■
Alloys
Birch, Oak, Beech, Mahogany, Pine, etc.;
Available Finish
Price
$$
Lead Time
About 6 business days
Glass
Glass is a hard, transparent material made from silica, used in windows, containers, lenses, and decorative items due to its clarity, strength, and versatility.
Color
■
Alloys
low-iron glass, tempered glass, etc.;
Available Finish
Price
$$
Lead Time
About 6 business days
Stone
Stone is a durable, natural material used in construction, landscaping, artworks (e.g., statues, jewelry), and inspection machines, valued for its strength, beauty, and versatility.
Color
■
Alloys
Granite, Marble, Artificial Stone, Quartzite, Sandstone, etc.;
Available Finish
Price
$$
Lead Time
About 6 business days
Ceramics
Ceramics is a super-rigid, insulating high high-temperature resistant material. It is widely used in electronic products. It can be used as a cutter as well.caping, artworks (e.g., statues, jewelry), and inspection machines, valued for its strength, beauty, and versatility.
Color
■
Alloys
Alumina, Zirconia, Magnesium oxide ceramics etc.;
Available Finish
Price
$$
Lead Time
About 6 business days
Injection Mold Surface Finishes
At JTC, we provide a full range of SPI surface finishes for injection molded parts. Use the chart below to select the finish grade best suits your part’s aesthetic and functional needs. Not sure which one to choose? Our injection molding experts are ready to assist you in selecting the ideal surface finish for your project.
| SPI Grade | Finish | Method | Surface Roughness Ra (μm) | Typical Application | |
| SPI A | A-1 | Mirror gloss | 6000 Grit diamond buff | ~0.012 – 0.025 | Optical parts, lenses, transparent components |
| SPI A | A-2 | High gloss | 3000 Grit diamond buff | ~0.025 – 0.05 | Clear housings, consumer products |
| SPI A | A-3 | Normal gloss | 1200 Grit diamond buff | ~0.05 – 0.10 | General gloss finishes |
| SPI B | B-1 | Fine semi-gloss | Grit paper #600 | ~0.05 – 0.10 | Smooth surface with slight texture |
| SPI B | B-2 | Medium semi-gloss | Grit paper #400 | ~0.10 – 0.20 | Consumer electronics, automotive interiors |
| SPI B | B-3 | Normal semi-gloss | Grit paper #320 | ~0.20 – 0.28 | Medium smooth finishes |
| SPI C | C-1 | Fine matte | Stone #600 | ~0.28 – 0.35 | Slightly textured surface |
| SPI C | C-2 | Medium matte | Stone #400 | ~0.35 – 0.40 | Utility parts |
| SPI C | C-3 | Normal matte | Stone #320 | ~0.40 – 0.55 | Functional parts with low cosmetic demand |
| SPI D | D-1 | Fine satin texture | Dry blast glass bead #11 | ~0.55 – 0.80 | Non-slip surfaces, tools, or industrial parts |
| SPI D | D-2 | Medium texture | Dry blast oxide #240 | ~0.80 – 1.00 | Coarse textures |
| SPI D | D-3 | Normal texture | Dry blast oxide #24 | ~1.00 – 1.50 | Very coarse or anti-glare finishes |
CNC Machining Applications
Our CNC machining services have been qualified by worldwide customers from diverse industries. We specialize in delivering high performance CNC machined parts for a wide range of applications, serving industries such as those listed below, and beyond.
Automotive
Injection molding in automotive manufacturing produces durable, precise components for interiors, exteriors, and under-the-hood parts, ensuring strength, efficiency, and design flexibility.
Robotics and Automations
Injection molding in robotics and automation creates lightweight, durable, and precise components that enhance performance, reliability, and efficiency in advanced mechanical systems.
Medical
Injection molding in the medical field produces precise, sterile, and reliable components for devices, instruments, and equipment, ensuring safety and consistency in healthcare applications.
Aerospace
Injection molding in aerospace creates lightweight, high-precision components used in interiors, engine systems, and structural parts, ensuring strength, consistency, and cost efficiency.
Consumer Products
Injection molding in consumer products enables mass production of durable, high-quality items with precise details, from household goods to electronic casings and everyday accessories.
Energy
Injection molding in the energy sector produces durable, high-performance components for power systems, electrical housings, and renewable energy equipment with precision and reliability.
Industrial Machinery
Injection molding in industrial machinery delivers strong, precise components that enhance performance, durability, and efficiency in demanding manufacturing environments.
Education
Injection molding in education supports hands-on learning and research by enabling the creation of prototypes, teaching tools, and functional models with accuracy and ease.
Injection Molding FAQ
The first step in our injection molding service is to design the injection mold tool. How long this takes will depend on the complexity of your project. The usual timeline can be as short as a week and as long as a couple of months.
The plastic pellets are melted and then inserted in liquid form into the mold tool, where it cools and takes the required shape. The process allows for high precision and tight tolerances because it can be replicated exactly each time.
Injection molding can use almost any type of plastic that can also be combined together. This unmatched versatility makes injection molding so popular and suitable for some of the most demanding industries in the world. You can check out the selection of available materials and finishes our injection molding service handles on this page.
Injection molding is one of the most affordable ways to manufacture large quantities of parts, especially for bigger production runs. Even though design for manufacturing and creating the mold can take time, the process then becomes very affordable and efficient.