Plastic Injection Molding

Plastic Injection Molding
Custom Plastic Injection Molding Services

Produce repeatable plastic parts at scale with custom plastic injection molding. From mold design to molding and finishing, parts stay consistent across prototypes and production volumes.

  • Mold Design & Building
  • Repeatable Parts at Scale
  • Wide Resin Selection
  • No Minimum Order Quantities
ISO 9001:2015 | ISO 13485:2016 | IATF 16949:2016
Custom Plastic Injection Molding Services
800+
Global Customers Served
100+
Total Equipments
5+
Production Bases
100+
Engineering & Design Veterans
18+
Manufacturing experience of years
20+
Technical patents

Our Plastic Injection Molding Capabilities

Wide Material Range
Wide Material Range
ABS, PC, PP, nylon, POM, and many other engineering plastics.
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Prototype to Production Tooling
Prototype to Production Tooling
Aluminum tools for fast prototypes and steel tools for production.
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Surface Finishes
Surface Finishes
Textures and polishes to match your cosmetic requirements.
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Secondary Operations
Secondary Operations
Printing, laser engraving, and assembly after molding.
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Choosing the Right Molding Process

Different molding approaches fit different part designs, volumes, and material combinations.
Comparison Factor Plastic Injection Insert Molding Over Molding Silicone Rubber Molding
Best For Standard plastic parts Parts with metal or other inserts Soft-touch or multi-material parts Flexible, heat-resistant rubber parts
Typical Materials ABS, PC, PP, nylon, POM Plastic with metal inserts Rigid plastic with TPE/TPU LSR and solid silicone
Typical Applications Housings, covers, clips Threaded inserts, connectors, electronics Grips, seals, handles Seals, medical and personal-care parts
Tooling, Molding & Finishing in One Place

Tooling, Molding & Finishing in One Place

We design and build molds in-house and run molding and secondary operations, giving you a single point of contact.

Injection Molding Materials

Choose from a range of materials for prototyping and production. Our engineers can help you select the best option for strength, appearance, environment, and budget.
ABS
Polycarbonate (PC)
Polypropylene (PP)
Nylon (PA)
POM (Acetal)
TPE / TPU / Silicone
ABS
ABS
ABS
ABS
ABS
ABS
ABS
ABS
ABS

ABS is a tough, easy-to-mold thermoplastic with a good surface finish, widely used for housings and consumer products.

Key Characteristics

Good impact strength

Good surface finish and paintability

Cost-effective

Common Grades

General-purpose, flame-retardant, high-impact

Typical Applications

Housings, enclosures, consumer products, automotive interior parts

Available Finishes

Texturing, painting, plating, laser engraving

Polycarbonate (PC)
Polycarbonate (PC)
Polycarbonate (PC)
Polycarbonate (PC)
Polycarbonate (PC)
Polycarbonate (PC)
Polycarbonate (PC)
Polycarbonate (PC)
Polycarbonate (PC)

PC is a transparent, high-impact thermoplastic with good heat resistance, suited to lenses, covers, and structural parts.

Key Characteristics

Very high impact strength

Transparent options

Good heat resistance

Common Grades

General, flame-retardant, glass-filled, PC/ABS blends

Typical Applications

Lenses, covers, electrical housings, medical devices

Available Finishes

Polishing, hard coating, painting

Polypropylene (PP)
Polypropylene (PP)
Polypropylene (PP)
Polypropylene (PP)
Polypropylene (PP)
Polypropylene (PP)
Polypropylene (PP)
Polypropylene (PP)
Polypropylene (PP)

PP is a lightweight, chemically resistant plastic with good fatigue resistance, often used for living hinges and containers.

Key Characteristics

Low density and low cost

Excellent chemical resistance

Good fatigue resistance

Common Grades

Homopolymer, copolymer, filled grades

Typical Applications

Containers, caps, hinges, automotive parts

Available Finishes

Texturing, printing

Nylon (PA)
Nylon (PA)
Nylon (PA)
Nylon (PA)
Nylon (PA)
Nylon (PA)
Nylon (PA)
Nylon (PA)
Nylon (PA)

Nylon offers strength, wear resistance, and heat resistance, and can be glass-filled for added stiffness.

Key Characteristics

High strength and wear resistance

Good heat resistance

Glass-filled grades available

Common Grades

PA6, PA66, PA6+GF, PA66+GF

Typical Applications

Gears, clips, structural parts, connectors

Available Finishes

Natural, dyed, texturing

POM (Acetal)
POM (Acetal)
POM (Acetal)
POM (Acetal)
POM (Acetal)
POM (Acetal)
POM (Acetal)
POM (Acetal)
POM (Acetal)

POM is a stiff, low-friction plastic with excellent dimensional stability for precision mechanical parts.

Key Characteristics

Low friction and high stiffness

Excellent dimensional stability

Good wear resistance

Common Grades

Homopolymer, copolymer

Typical Applications

Gears, bearings, precision mechanical parts

Available Finishes

Natural, dyed

TPE / TPU / Silicone
TPE / TPU / Silicone
TPE / TPU / Silicone
TPE / TPU / Silicone
TPE / TPU / Silicone
TPE / TPU / Silicone
TPE / TPU / Silicone
TPE / TPU / Silicone
TPE / TPU / Silicone

Elastomers are used for soft-touch grips, seals, and flexible parts; liquid silicone rubber (LSR) suits medical and personal-care applications.

Key Characteristics

Soft, rubber-like feel

Good sealing performance

Suitable for over-molding

Common Grades

TPE, TPU, LSR (confirmed during project review)

Typical Applications

Grips, seals, gaskets, wearable products, medical parts

Available Finishes

Texturing, color matching

Surface Finishing Options

Enhance appearance, corrosion resistance, and durability with finishing options matched to your material and application.
Finishing Option Typical Effect Suitable Materials Typical Use
Standard Mold Finish Machined or lightly polished mold surface. All plastics Internal and functional parts
Texturing Etched texture that hides flow lines and adds grip. ABS, PC, PP, nylon Housings, handles, consumer products
High-Gloss Polish Mirror-like surface. ABS, PC, PMMA Lenses, visible covers
Painting & Plating Colored or metallic cosmetic finish. ABS, PC/ABS Consumer electronics, automotive trim
Pad Printing & Laser Engraving Logos, icons, and markings. Most plastics Buttons, panels, branded parts

Plastic Injection Molding Tolerances & Lead Times

Typical capabilities for prototype and production parts. Contact our engineering team for requirements beyond the values below.
Capability Typical Value
General Tolerances Typically ±0.05–0.1 mm, depending on part size and material
Tooling Lead Time Confirmed after DFM review and mold design
Prototype Parts Quick-turn samples through prototype tooling
Order Quantity Flexible; from low volume to mass production
* Typical values only. Shrinkage, wall thickness, and part geometry affect final accuracy, and are confirmed during mold design and DFM review.

Plastic Injection Molding Equipment & Manufacturing Capabilities

Injection Molding Machines

Injection Molding Machines

Mold Machining Center

Mold Machining Center

Inspection Equipment

Inspection Equipment

Why Choose Mastars for Plastic Injection Molding?

Tooling and Molding Under One Roof
In-house mold design, tooling, and molding shorten lead time and simplify communication.
100+ Engineering Professionals
Direct access to engineers for DFM reviews, gate and cooling design, and cost optimization.
Certified Quality Systems
ISO 9001, ISO 13485, and IATF 16949 certified processes supported by documented inspection procedures.
Prototype to Production Scalability
From quick-turn prototype tools to multi-cavity production molds.
DFM Review on Every Order
Feedback on draft, wall thickness, and gate location before steel is cut.
Trusted by Global Engineering Teams
Supporting customers across medical, automotive, consumer electronics, and industrial equipment.

Certifications

ISO9001:2015 Certificate

ISO9001:2015 Certificate

IATF16949:2016 Certificate

IATF16949:2016 Certificate

ISO13485:2016 Certificate

ISO13485:2016 Certificate

Medical A-Class Supplier

Medical A-Class Supplier

Partners

Auer Lighting
Bentley
Aston Martin
NVIDIA
Compac
Auer Lighting
Bentley
Aston Martin
NVIDIA
Compac

How Plastic Injection Molding Works

Upload Your Design

Share your CAD files, drawings, quantity, material, and any critical requirements.

Get an Engineer-Reviewed Quote

Receive pricing, lead time, and manufacturability feedback based on your part requirements.

Production Begins

Once you approve your quote, manufacturing starts — from prototype tooling to full-scale runs.

Parts Shipped

Finished parts are inspected, packaged, and shipped with the required quality documentation.

What Our Customers Say

Charlie Ozana

Charlie Ozana

Company: 445 LTDJob Title: CEOBusiness: Full turnkey company
Mastars in all my projects are partners. So I get all the support that I need from engineering management, pricing, timetable, QA, everything is as a partner, not as a supplier. For me, Masters is like home.
Nathan Johnson

Nathan Johnson

Company: Gusto Global IndustriesJob Title: DirectorBusiness: Dust reduction system
They were such a lovely company to deal with, and we couldn't be more happier even to today down the track with even more products moving forward. Very professional, easy to deal with, get back to you straight away, contact is easy through WeChat and email, move forward as quickly as you can.
Oded Kalawanl

Oded Kalawanl

Company: Annabella Tech IsraelJob Title: R&D managerBusiness: Breast pump
We managed to make it in a very short time warm prototyping to mass production and FDA approval. That makes me feel confidence to choose Mastars.
Jade Harris

Jade Harris

Company: Buddy SystemJob Title: Co-founderBusiness: Wireless instant safety alert device
We're glad that we found a company like Mastars to make the product for us because it's been so good to deal with. They're a really good company.
Dror Harel

Dror Harel

Company: BlonessJob Title: General ManagerBusiness: L300, H200
I think the relationship between the buyers and definitely between me the Mastars it's like a family relationship and this is why we are so happy to produce in Mastars and this is why we came for 15 years. By the way, now we came with a new product that we come to Master to produce for the new year.

Plastic Injection Molding Service FAQs

  • What is Plastic Injection Molding and when should I choose it?

    Plastic injection molding injects molten plastic into a mold cavity to produce parts with high repeatability and low unit cost at volume. Choose it for medium to high volumes and parts that need consistent quality.

  • What materials can be used for Plastic Injection Molding?

    A range of materials is available, including ABS, Polycarbonate (PC), Polypropylene (PP), Nylon (PA), POM (Acetal), TPE / TPU / Silicone. The best choice depends on strength, appearance, operating environment, and budget. Our engineers can help you select the right one during the quote review.

  • What tolerances can Plastic Injection Molding achieve?

    Achievable tolerances depend on material, part size, and geometry. Typical values are listed on this page, and tighter tolerances can often be held on critical features. Share your drawing and we will confirm during the DFM review.

  • Can you support both prototype and production Plastic Injection Molding?

    Yes. We support everything from a single prototype to ongoing production programs, so you can scale without changing supplier.

  • How much does Plastic Injection Molding cost?

    Cost depends on material, part size and complexity, quantity, tolerances, and finishing. Upload your CAD model and drawing to receive a quote, and our engineers can suggest design changes that reduce cost.

  • What file formats do you accept for Plastic Injection Molding quotes?

    We accept common 3D CAD and 2D drawing formats, including STEP, STP, IGES, STL, SLDPRT, X_T, DXF, DWG, and PDF. If your format is not listed, please contact us.

  • How quickly can you deliver Plastic Injection Molding parts worldwide?

    Lead time depends on process, quantity, and finishing. Prototypes can often ship within a few business days, and we ship worldwide. Contact us with your requirements for a lead-time estimate.

  • What affects injection molding tooling cost?

    Main factors are part size and complexity, number of cavities, mold steel, surface finish, and expected volume. We provide a quote after reviewing your CAD model and target quantity.

Tell Us About Your Project

Share your project details and files with us. Rough information is fine to start. Our engineering consultant will contact you within 24 hours.

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