Plastic Injection Molding
with Mastars
Request an online quote today for custom plastic parts delivered in days.
Plastic Injection Molding Service
Injection molding is a high-efficiency process: molten plastic is injected into a precision mold, cooling into the final part. With minimal waste and low per-unit costs, it’s widely used for large-scale plastic production in medical, consumer goods, and automotive sectors.
Our custom injection molding offers 1-day lead times—ideal for prototypes and end-use parts. Using cost-effective aluminum molds and 200+ thermoplastics, we deliver rapid turnaround and consistent quality for diverse projects.
Plastic Molding Capabilities
Our basic guidelines for plastic injection molding include important design considerations to help improve part moldability, enhance cosmetic appearance, and reduce overall production time.
| Type | US | Metric | ||
| Size | 18.9 in. x 29.6 in. x 8 in. | 480mm x 751mm x 203mm | ||
| Volume | 59 cu. in. | 966,837 cu. mm | ||
| ABS | 4 in. from parting line | 101mm from parting line | ||
| Up to 8 in. if parting line can pass through the middle of the part | Up to 203.2mm if the parting line can pass through the middle of the part | |||
| Projected Mold Area | 175 sq. in. | 112,903 sq. mm | ||
| ABS-Like | ABS-Like Translucent/Clear (WaterShedXC 11122) | Injection Molding | ||
Thermoplastic Materials
✔️ General Purpose Plastics
·HDPE ·LDPE ·LLDPE ·PS ·Polypropylene
✔️ Engineering Plastics
·ABS ·ABS/PC ·Acetal ·Acetal Homopolymer/Delrin ·ETPU ·Nylon ·PBT ·PC/PBT ·Polycarbonate ·PET ·PETG ·PMMA (Acrylic, Plexiglas) ·PPE/PS ·PPA ·TPU
✔️ High-Performance Engineering Plastics
·LCP ·PEEK ·PEI ·PSU
PIM Common Applications
· Low-volume production
· Bridge tooling
· Pilot runs
· Functional testing and prototyping
How Custom Plastic Injection Molding Works
Plastic injection molding requires an injection machine, raw plastic, and a mold. Melted plastic is injected into the steel/aluminum mold, then cools and solidifies into the final part.
Xometry reviews your injection molding quote & parts for manufacturability, aligns specs, lead time and price with your needs, CNC machines molds via 3D CAD, sends T1 samples for approval, refines molds and starts production—covering medical, automotive, aerospace and defense parts.
Endless Options
Select from millions of customizable combinations of materials, finishes, tolerances, markings, and certifications for your order.
Easy to Use
Enjoy door-to-door part delivery, free from the hassle of sourcing, project management, logistics and shipping.
Vetted Network
We hold ISO 9001:2015, ISO 13485, and IATF 16949 certifications. Only top-tier factories can pass our rigorous supplier qualification process.
Quality Inspections Services
✔️ Designing for Manufacturability Feedback (DFM)
✔️Scientific molding process development report
✔️In-process CMM inspection and machine monitoring
✔️First article inspection (FAI) and process capability report with GD&T
Post-Processing Services
· Mold Texturing (Mold Tech Surface Finishes)
· Threaded Inserts
· Pad Printing
· Laser Engraving
· Component Assembly
Custom Injection Moldings Design Guidelines
| Feature | Tip | ||
| Undercuts | Add pass-thru coring to reduce undercuts, which would otherwise increase the complexity and cost of mold ejection mechanisms | ||
| Wall Thickness | Maintain uniform wall thickness to prevent sink marks and voids; thinner walls reduce cycle time and cut costs | ||
| Drafts | Design parts with a minimum 0.5° draft angle—up to 5° for medium-textured surfaces | ||
| Ribs/Gussets | Design ribs to be 40–60% of the outer wall thickness, with draft angles maintained at all times. | ||
| Bosses | Bosses are designed to 30% of the wall thickness in depth with a 30% edge groove; attach them to side walls or ribs for structural integrity | ||
Our Ideas Have Helped Clients Bring Hundreds Of Products To Market
Certificates
Choose Mastars, You'll Gain
We don't have MOQ, only 1pcs is according to high standard to make, we pursuit the product is perfect to every customer, from 1pcs to million,we are glad to witness and grow together with our customers, that make us proud.
Download Our Manufacturing Equipments List
We offer a one-stop processing service from prototypes and molds to machining and assembly, and are equipped with various models of processing equipments from major domestic and international companies, for CNC machining, injection molding, mold making, and sheet metal manufacturing. Download Now！
Our Production Capability
✔️ More than 30 injection molding machines of various models
✔️ 2000T Sets injection machines from 30T to 2000T
✔️ 24H 3*8h shifts Uninterrupted production
✔️ Injection parts precision 0.01mm
Our Services
We don't have MOQ, only 1pcs is according to high standard to make, we pursuit the product is perfect to every customer, from 1pcs to million,we are glad to witness and grow together with our customers, that make us proud.
Industries We Serve
We don't have MOQ, only 1pcs is according to high standard to make, we pursuit the product is perfect to every customer, from 1pcs to million,we are glad to witness and grow together with our customers, that make us proud.
Our Partners
Quick links
Technical video
Stay Connected!
Manufacturing on Demand
Please fill in the following information to obtain plan details (information is confidential and not disclosed publicly), we will contact you within 24 hours, please keep your phone available!
Upload a 3D/2D model to see instant pricing, lead time, and DFM feedback.
