Efficiency
High production rates with minimal waste, allowing for cost-effective manufacturing of complex parts.
Custom Injection Molding Services
We support injection molding from rapid tooling and sample validation through high-volume production, with custom mold design, controlled cycle development, and dimensional inspection for complex plastic and LSR parts.
With a focus on quality control, we deliver precision-molded parts tailored to your specific project requirements.
Request QuoteProduction-Site Quality Review
Material & Process Matching
Project-Specific Documentation
Quantities Confirmed with Quote
Dimensional Inspection
Custom Plastic Parts
Plastic Injection Molding Manufacturer
Injection molding is a highly efficient manufacturing process used to produce precision plastic parts by injecting molten material into a mold. It is recognized for its ability to create complex, high-quality components with consistency and scalability, making it ideal for both functional prototypes and mass production.
FECISION coordinates injection molding through manufacturing partners. Applicable site qualifications, material selection, drawing tolerances and inspection requirements are reviewed for each program. DFM and any mold-flow analysis are scoped before tooling.
Get A QuoteKey Features
Precision
Exceptional dimensional accuracy and repeatability, ensuring consistent part quality across production runs.
Versatility
Ability to work with a wide range of materials and produce complex geometries with varying textures and finishes.
Prototyping vs. Production
For sample validation, bridge production or repeat small batches, review our rapid tooling and low-volume injection molding services. Tool construction and the production plan are matched to the intended resin, acceptance requirements and forecast.
Prototyping & Low-Volume Molding
- Sample and repeat-batch quantities reviewed together
- Tooling and sampling milestones agreed with the quotation
- Design validation in the intended molding resin
- Material testing and selection
- Design refinement before production release
Production
- Batch quantities and annual demand reviewed together
- Cavity layout and automation assessed for the program
- Drawing-based inspection and acceptance planning
- Repeat-order dimensional and appearance checks
- Capacity confirmed with the selected production site
Injection Molding Types
LSR Injection Molding
Transforms two-part liquid silicone rubber material into finished components
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Overmolding
Inject one material over an existing substrate to form a bonded, multi-material part
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Insert Molding
Embed metal or other parts into the molded part during the injection process
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Cleanroom Injection Molding
Manufacture precision molded parts in a controlled cleanroom environment for medical applications
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Large Part Injection Molding
Use high-tonnage injection molding machines to generate large parts
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Two-Shot Injection Molding
Combine two or more materials in a single molding cycle
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Gas-Assisted Injection Molding
Combines traditional injection techniques with controlled gas injection
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In-Mold Decoration/Labeling
Combines a pre-printed label or decorative film with injection molding
See MoreInjection Molding Capabilities
We match the selected manufacturing partner, tooling route and inspection plan to your part. Start with the interfaces that matter: a housing fit, a retained insert, a sealing face or a repeatable assembly.
StandardTechnical Data
TolerancesCritical dimensions and measurement methods agreed from the drawing
Dimensional StabilityReview resin conditioning, shrinkage and repeat-order inspection
Cycle TimeEstablished for the resin, cavity layout and cooling requirements
OutputCapacity reviewed with the selected production site and demand plan
Material UseRunner design, scrap and any permitted regrind defined for the application
RecyclabilityMany plastics such as PET, PP, and ABS are recyclable
Cost Per UnitOffset by low per-unit costs in mass production
Tooling LongevityTool life and maintenance obligations specified for the molding program
Surface FinishesCosmetic zones, textures and inspection standards agreed before tooling
Process SelectionPress and auxiliary equipment matched to the part and material
Material VarietyThermoplastic and silicone grades reviewed against intended use
Production Planning
- Trial and annual demand review
- Capacity confirmed with the selected site
- Handling and automation assessment
- Repeat-order and inspection planning
Quality Control
- CMM inspection
- Vision inspection systems
- Statistical Process Control (SPC)
- First Article Inspection (FAI)
Value-Added Services
- Assembly and kitting
- Packaging solutions
- Inventory management
- JIT delivery
Ready to Start Your Injection Molding Project?
Discuss your project requirements and get a free quote from our injection molding experts.
Injection Moldable Plastics
Use these material families to narrow the shortlist, then approve an exact grade, filler, color and supplier specification. Regulatory contact suitability, sterilization resistance and flammability depend on that selection and the finished-part requirements.
Acrylonitrile Butadiene Styrene (ABS)
Key Properties:- A candidate for impact-resistant housings with cosmetic surfaces.
- Select a coating-compatible grade if painting or plating is required.
- Drying and processing follow the selected grade instructions.
Typical Applications:
Automotive interiors, electronics housings, consumer products, toys
Polypropylene (PP)
Key Properties:- Low-density resin available in homopolymer and copolymer grades.
- Living hinges need a suitable grade, flow orientation and cycling validation.
- Review shrinkage, chemical exposure and mating fits for the chosen formulation.
Typical Applications:
Packaging, living hinges, medical pipettes, automotive parts, bottles
Polystyrene (PS)
Key Properties:- Optically clear (general-purpose), brittle.
- Low cost.
- Limited temperature resistance.
Typical Applications:
Disposable lab ware, transparent packaging, low-stress consumer product parts, optical lenses (precision grade)
High-Density Polyethylene (HDPE)
Key Properties:- Stiff and strong
- Excellent chemical resistance
- Low moisture absorption
Typical Applications:
Industrial containers, pipes, tanks, bottle caps, toys
Low-Density Polyethylene (LDPE)
Key Properties:- Flexible and tough
- Good moisture barrier
- Low cost
Typical Applications:
Flexible snap fasteners, squeeze bottle nozzle caps, six-pack ring buckles, thread-protective soft caps
Polyvinyl Chloride (PVC)
Key Properties:- Rigid and plasticized formulations serve different functions.
- Check the exact compound against fluids, cleaners and service temperature.
- For contact-sensitive uses, review additives, supplier documentation and the specified sterilization method.
Typical Applications:
Cable insulation, protective covers, connector components and application-specific housings
Polymethyl Methacrylate (PMMA)
Key Properties:- A candidate for clear parts where optical appearance matters.
- Specify transmission, haze and cosmetic acceptance at the intended wall thickness.
- Review impact loading, cleaners and grade-specific drying instructions.
Typical Applications:
Displays, diagnostic cuvettes, LED diffusers, light guides, lenses, cosmetic packaging
Polyethylene Terephthalate (PET)
Key Properties:- Available in grades for clear or reinforced molded components.
- Review crystallinity, reinforcement and temperature requirements together.
- Drying and contact suitability are confirmed from the selected grade documentation.
Typical Applications:
Connector insulating housings, coil bobbins, wiper motor housings, engine shield covers
PET + Glycol Modification (PETG)
Key Properties:- Easier processing than PET
- Better impact resistance
- No stress whitening
Typical Applications:
Displays, face shields, food-contact products, medical devices
Acrylonitrile Styrene Acrylate (ASA)
Key Properties:- UV resistant
- Similar to ABS but outdoor-stable
- Good color retention
Typical Applications:
Outdoor housings, automotive exteriors, garden equipment
Polylactic Acid (PLA)
Key Properties:- Biodegradable
- Lower performance
Typical Applications:
Packaging, disposable medical products, consumer goods
Polyetherimide (PEI)
Key Properties:- A candidate for elevated-temperature electrical and mechanical parts.
- Verify flammability ratings for the exact grade, color and tested thickness.
- Evaluate repeated sterilization against the chosen method and number of cycles.
Typical Applications:
Equipment housings, electrical connectors and application-specific instrument components
Polyamide (Nylon, PA66 / PA6)
Key Properties:- Unfilled, reinforced and lubricated grades serve different loads and wear conditions.
- Set drying and conditioning from the grade guidance and measurement plan.
- Evaluate mating fits in the intended moisture and temperature condition.
Typical Applications:
Gears, bearings, connectors, automotive under-hood components, fasteners
Glass-Filled Nylon (PA-GF)
Key Properties:- Higher stiffness and strength
- Improved dimensional stability versus unfilled nylon
Typical Applications:
Structural automotive parts, power-tool housings, industrial components
Polyphthalamide (Aromatic PA)
Key Properties:- Higher heat resistance than standard PA
- Good chemical resistance
- Lower moisture absorption
Typical Applications:
Automotive under-hood parts, connectors, LED housings, fuel-system components
Polyoxymethylene (Acetal / Delrin, POM)
Key Properties:- Excellent stiffness, low friction, and dimensional precision.
- Self-lubricating.
- Higher shrinkage (1.8–2.5%).
Typical Applications:
Precision gears, bearings, conveyor components, plumbing fittings, eyeglass frames, micro-valve seats, snap-fit functional parts
Polycarbonate (PC)
Key Properties:- Clear and opaque grades available for impact-sensitive housings.
- Review cleaners, stress cracking and any sterilization exposure for the exact grade.
- Use grade-specific drying and molding instructions.
Typical Applications:
Diagnostic cartridge bodies, wearable device housings, equipment covers, optical components
Polybutylene Terephthalate (PBT)
Key Properties:- Candidate resin for dimensionally controlled electrical components.
- Match reinforcement, electrical requirements and moisture exposure to the grade.
- Flammability classifications depend on the grade, color and tested wall thickness.
Typical Applications:
Connector housings, electronic enclosures, automotive sensor bodies, switches, circuit breakers, precision instrument parts
Glass-Filled PBT (PBT-GF)
Key Properties:- Higher stiffness and heat deflection than unfilled PBT
- Excellent dimensional stability
- Strong electrical properties and low-warpage grades available
Typical Applications:
Automotive electrical components, connector housings, industrial parts, motor end caps
Polyether Ether Ketone (PEEK)
Key Properties:- A candidate for demanding chemical, wear and thermal conditions.
- Compare unfilled and reinforced grades against load, mating material and dimensional requirements.
- Medical contact and repeated sterilization need exact-grade documentation and application validation.
Typical Applications:
Bushings, instrument components, bearings, pump components and electrical insulation
Polyphenylene Sulfide (PPS)
Key Properties:- Used for demanding thermal and chemical environments
- Reinforcement, weld lines and fiber orientation affect dimensional behavior
- Verify temperature and flammability data for the exact grade and part conditions
Typical Applications:
High-temperature sensor housings, aerospace connectors, chemical-processing components, pumps, valves
Polyphenylsulfone Radel R (PPSU)
Key Properties:- Highest toughness among sulfones
- Steam sterilizable and hydrolysis resistant
- Transparent
Typical Applications:
Baby feeding bottles, medical instrument components, sterilization trays, hot-water fittings, aircraft interiors
Polyvinylidene Fluoride (PVDF)
Key Properties:- High purity and chemical resistance
- Piezoelectric properties
- UV stable
Typical Applications:
Chemical processing, battery components, solar panels, plumbing
Liquid Crystal Polymer (LCP)
Key Properties:- High-flow grades available for fine electrical features
- Evaluate wall thickness, flow length and anisotropic shrinkage with the tooling design
- Electrical and reflow suitability depend on the grade and application
Typical Applications:
Fine-pitch connector housings, sensor housings, electrical insulators and SMT components
Liquid Silicone Rubber (LSR)
Key Properties:- Select hardness, tear behavior and compression requirements for the seal or flexible interface.
- Review cure, post-cure and media exposure with the specified grade.
- Biocompatibility is assessed for the exact material and finished application, not the LSR family name.
Typical Applications:
Seals, diaphragms, cable grommets, flexible valves and sensor interfaces
Thermoplastic Polyurethane (TPU)
Key Properties:- Flexible grades offer different hardness, abrasion and rebound behavior.
- Review ether- or ester-based chemistry against moisture, oils and cleaners.
- Use exact-grade processing guidance and contact documentation.
Typical Applications:
Wearable enclosures, rollers, seals, protective covers and soft interfaces
Thermoplastic Elastomer (TPE)
Key Properties:- Rubber-like soft-touch feel
- Recyclable
- Overmold compatible
Typical Applications:
Grips, handles, seals, overmolded components, consumer goods
Thermoplastic Vulcanizate (TPV)
Key Properties:- Superior elasticity compared with TPE
- Weather resistant and durable
Typical Applications:
Automotive seals, gaskets, weatherstripping, hoses
Cyclic Olefin Polymer / Copolymer (COC / COP)
Key Properties:- High clarity
- Low moisture absorption
- Glass-like appearance
Typical Applications:
Optical lenses, medical vials, diagnostic devices
Polyphenylene Oxide / Ether (PPO / PPE)
Key Properties:- Low moisture absorption
- Good electrical properties
- Dimensionally stable
Typical Applications:
Pump housings, water-softener parts, electrical components
Common Finishes for Injection Molding
Surface treatments enhance the appearance, functionality, and durability of injection molded parts.
Spraying Coating
Applies UV-curable paint, anti-scratch coatings, and decorative color layers.
Laser Engraving
Creates permanent logos, serial numbers, and precise markings.
Pad Printing
Transfers detailed graphics and labels onto complex surfaces.
Texturing
Creates patterns, grains, and matte effects on plastic parts.
Sandblasting
Cleans and roughens surfaces or produces a uniform matte finish.
Electroplating
Deposits chrome, nickel, and other metal layers onto plastic.
Heat Transfer Printing
Uses heat and pressure to apply durable, colorful designs.
Polishing
Refines surfaces for reduced roughness and enhanced smoothness.
Injection Molding Process
Our streamlined injection molding process ensures precision, efficiency, and consistent quality from design to delivery.
Design & Engineering
Our engineering team collaborates with you to refine your part design for manufacturability, ensuring optimal mold flow, material selection, and cost efficiency.
Mold Design & Fabrication
We design and manufacture precision molds using advanced CNC machining and EDM processes, ensuring durability and dimensional accuracy for consistent part production.
Material Preparation
Plastic resins are carefully selected, dried if necessary, and prepared for molding. Colorants and additives are precisely mixed to achieve the desired properties.
Injection Molding
Molten plastic is injected into the mold cavity under precise pressure and temperature conditions. The material cools and solidifies into the desired part shape.
Part Ejection & Inspection
Finished parts are ejected from the mold and undergo rigorous quality inspection to ensure they meet all specifications and tolerances.
Finishing & Assembly
Parts may undergo additional processing such as surface treatment, painting, or assembly before final packaging and delivery.
Injection Molding Project Timeline
Efficient project execution from concept to completion.
1Review gate
Design & Engineering
Confirm the drawing revision, exact resin grade, mating parts and open DFM decisions.
2Tooling approval
Mold Design & Fabrication
Approve the mold design, construction and quoted build milestones before cutting steel.
3Sample approval
Sampling & Validation
Review identified samples, dimensional results, fit checks and any required revisions.
4Batch release
Production
Release the agreed order against approved samples, material and inspection requirements.
5Delivery release
Finishing & Delivery
Confirm finishing, packaging, inspection records and the agreed shipping arrangements.
From requirements to release
Turn a part drawing into an agreed manufacturing scope
A useful quotation connects the functional drawing to tooling, samples and repeat production. Agree the documents and checks your project needs before ordering.
Bring to the review
Current CAD and drawing revision, mating-part interfaces, exact resin or selection criteria, trial and repeat quantities, cosmetic zones and critical dimensions.
Before tooling
DFM findings, proposed part changes and a tooling scope tied to the drawing revision.
Decision to agreeResolve fixed interfaces, gate locations and open tolerances before releasing the tool.
At sampling
Cavity-identified samples and the dimensional or appearance records included in the quotation.
Decision to agreeSeparate a molding correction from a requested design change and retain the revised baseline.
Before production
An agreed sample reference, inspection criteria and approval hold points.
Decision to agreeConfirm who approves assembly or functional checks before the production order is released.
For repeat orders
The approved drawing, material, finish, packing and report requirements for the reordered configuration.
Decision to agreeReview changes to the part, resin or quantity against the accepted baseline.
Selected project records
Injection Molding Projects: From Requirements to Results
Explore the problem, manufacturing decisions and reported checks. Each case keeps its test conditions and current project stage in view.
Production supply · 85,000 pieces through September 2026
Hose barb: retain the tube and identify each cavity
- Problem
- The molded barb and the specified tube needed a repeatable retention check.
- Engineering decision
- Review barb geometry and gate balance, then sample all eight cavities with the actual tubing.
- Reported result
- T1 pull-off: 62–78 N on 24 specimens, three per cavity, with 6 mm-ID Shore A85 PU tube, 10 mm insertion and a 50 mm/min test rate. This is not a pressure or leakage rating.
Production supply · component-level acceptance
Analyzer housing: align cosmetics, coating and assembly
- Problem
- The display region, coated surface and lower-housing fit had different acceptance needs.
- Engineering decision
- Coordinate display-area DFM, wall changes and coating preparation with separate inspection methods.
- Reported result
- The project inspection summary reported a 0.25–0.35 mm assembled gap, measured at eight locations per part. The summary does not establish a whole-lot pass rate or equipment certification.
Injection Molding Applications
Industries We Serve
Bring the application requirements into the molding review: contact conditions, assembly loads, cleanliness, traceability and the records needed for release.
Automotive
- Interior and exterior components
- Engine and underhood parts
- Electrical connectors and housings
Medical
- Diagnostic equipment components
- Surgical instruments and tools
- Medical device housings
Aerospace
- Cabin interior components
- Avionics housings and panels
- Structural components
Consumer Electronics
- Device housings and bezels
- Connectors, buttons, and charging components
- Insulators and internal structural parts
Robotics
- Actuator components
- Grippers and end effectors
- Sensor housings and covers
Industrial
- Equipment housings and control components
- Gears, guides, guards, and handles
- Seals and cable-management parts
Custom Injection Molding Design Guidelines
Follow these guidelines to optimize part design for manufacturability, cost, and performance.
Wall Thickness
Maintain uniform wall thickness throughout your part to prevent sink marks, warping, and internal stresses.
- Select nominal walls against the resin, flow length and load
- Review local thick sections and cosmetic sink risk
- Use gradual transitions between different wall sections
Undercuts
Minimize or avoid undercuts whenever possible, as they complicate mold design and increase cost.
- Consider alternative designs that eliminate undercuts
- Use side actions or lifters for necessary undercuts
- Threaded features often require unscrewing mechanisms
Draft Angles
Include proper draft angles on all vertical surfaces to facilitate easy part ejection from the mold.
- Review draft for the resin, draw depth and release direction
- Allow additional draft where the agreed texture requires it
- Protect mating dimensions when changing taper or parting lines
Ribs & Bosses
Use ribs to increase part stiffness without increasing wall thickness. Bosses provide strong mounting points.
- Compare local rib thickness with sink risk on the opposite face
- Review rib height, draft and fill path together
- Define boss geometry around the actual screw, insert and assembly load
Radii & Fillets
Use generous radii and fillets at all corners to improve part strength and mold filling.
- Match internal radii to wall thickness and the load path
- Review external radii for a consistent wall transition
- Evaluate sharp corners for stress concentration and filling risk
Parting Lines
Consider the location of parting lines early in the design process to minimize their visual impact.
- Place parting lines in less visible areas when possible
- Design for a straight, simple parting line if possible
- Account for potential flash along the parting line
Need Help with Your Design?
Our engineering team provides comprehensive DFM analysis to optimize your part for injection molding.
Injection Molding Advantages
Injection molding offers numerous benefits that make it the preferred manufacturing process for a wide range of industries and applications.
Cost Efficiency
Lower per-unit costs for high-volume production, with minimal material waste compared to other manufacturing processes.
High Precision
Exceptional dimensional accuracy and repeatability, ensuring consistent part quality across production runs.
Design Flexibility
Ability to produce complex geometries with varying wall thicknesses, undercuts, and intricate details.
Production Speed
Fast cycle times and high production rates, enabling quick turnaround for large quantities.
Material Versatility
Compatible with a wide range of plastics and composites, each offering unique properties for specific applications.
Automation Potential
Easily integrated with automation systems for part removal, inspection, and assembly, reducing labor costs.
Why Choose Fecisionfor Injection Molding?
Quality Commitment
The selected production site and its applicable ISO 9001, ISO 13485 or IATF 16949 scope are reviewed against the project requirements.
Expert Team
Experienced engineers and technicians with deep expertise in injection molding processes.
Fit and Functional Review
Review mating components, assembly loads and sealing conditions alongside the molded-part drawing.
Visible Approval Milestones
Separate tooling, sampling, customer approval, production and shipping in the agreed schedule.
Customer Focus
Collaborative approach with dedicated project managers for personalized service.
Repeat-Order Control
Keep approved samples, resin grades, drawing revisions and agreed checks linked to subsequent orders.
How to Work with Us
The plastic molding process involves numerous parameters that must be carefully regulated to maintain the quality and consistency of the produced components.
Submit Drawings
For a free quote, please submit a product description along with a technical drawing. We also offer reverse engineering services to assist you.
DFM & Quotation
Agree the DFM record, proposed changes, tooling route, sample quantities and acceptance requirements. Scope a dedicated mold-flow study separately where it is needed.
Mold Manufacturing
Upon your confirmation to the mold design, our team will begin making mold components, which will then be sent for inspection and assembly.
Injection Molding
Once the mold is complete, we will initiate the plastic molding process. A T1 sample will be provided for you to check whether the product details align with your specifications. After approval we will continue massive production.
Delivery
Your custom-designed plastic parts undergoes thorough inspection, will be carefully packaged, and delivered to you.
Injection Molding Product Gallery
Browse our gallery of injection molded products across various industries and applications.
Custom Injection-Molded Clips and Retainers
Review the clip and its mating part together. Explore our custom clip and retainer application, compare two concepts in the illustrative releasable-clip study, and define a cycle-test plan before tooling approval.
Contact Us for Injection Molding Services
Ready to discuss your injection molding project?
Request a quote, and our experts will contact you shortly.
Injection Molding FAQs
What determines the lead time for injection molding?
Timing depends on part geometry, mold construction, resin availability, trial requirements and production quantity. The quotation separates tool build, sampling, customer approval and production milestones; a delivery date is confirmed for the agreed scope.
Are there any design limitations to consider?
Designs should minimize undercuts, maintain consistent wall thickness, and incorporate suitable draft angles for reliable filling and ejection.
What is the minimum order quantity?
MOQ depends on the project. We support both small-batch validation and high-volume production.
Can injection molding produce tight-tolerance parts?
Identify the critical molded-part dimensions, datum scheme, conditioning and measurement method on your drawing. Tool machining tolerances are not molded-part tolerances: resin shrinkage, geometry and process variation must be evaluated on trial parts before an acceptance range is committed.
What is included in a DFM review?
The review covers filling, wall transitions, draft, parting lines, gates, ejection and the features that control fit or sealing. Agree the depth of the review, deliverables and any analysis charges with the quotation; a dedicated mold-flow study is scoped separately.
Can Fecision produce quick-turn aluminum molds?
Yes. We produce both aluminum and steel molds according to project life, volume, and validation needs.
What is the difference between aluminum and steel molds?
Aluminum is cost-effective for prototypes and short runs; steel is preferred for long-life, higher-volume production.
How can I reduce injection molding costs?
Optimize the part for manufacturability, reduce complexity and undercuts, select suitable materials, and match tooling to expected volume.
Custom molded parts by application
Move from a general process review to the interfaces, materials and acceptance questions for your particular component. These are custom design applications, not stock products.
Custom Injection-Molded Electronic Enclosures
Housing bases, lids and bezels made to your design. Review PCB supports, connector openings, resin, appearance and assembly acceptance.
Review the application →
Connector Insulators & Terminal Carriers
Custom molded insulating bodies and terminal carriers. Define terminal interfaces, locating references, exact resin and component acceptance.
Review the application →
Custom Injection-Molded Plastic Gears
Custom polymer gear parts made to your design. Review tooth geometry, mating gears, mounting interfaces, duty and inspection requirements.
Review the application →
Custom Protective Caps & Plugs
Custom molded protectors for industrial interfaces. Review contact zones, counterpart variation, retention, removal and exposure requirements.
Review the application →More custom molding applications
Explore the part-specific interfaces, material questions and sample checks before requesting a quotation.
- LED Light Pipes
Connect the LED, clear molded guide and visible panel indicator in one design review.
- Plastic Bushings
Define the installed shaft-to-bushing fit, not only the dimensions of a loose sleeve.
- LSR Gaskets & Seals
Review the seal together with its groove, closure and intended exposure.
- Living-Hinge Parts
Design the flexible web together with the lid, frame, latch and intended movement.
- Coil Bobbins
Keep the core, winding envelope and terminal arrangement connected to the molding specification.
- Control Knobs
Match the grip, shaft connection and visible index to the same controlled assembly.