Custom Injection Mold Services for Plastic Parts
GBM offers injection mold services from DFM review to mold delivery, supporting overseas buyers in automotive, electronics, packaging, medical, appliance, and industrial sectors.
- DFM review before mold design, covering key aspects like wall thickness, draft, ribs, bosses, and ejection risk.
- Mold support: CNC, EDM, wire cutting, polishing, fitting, T1 trial.
- Export mold delivery with T1 samples, feedback, reports, spare parts, photos, and documents as needed.
What Are Custom Injection Mold Services?
Custom injection mold services help turn a plastic part design into a production-ready mold that can repeatedly form plastic parts with stable shape, surface and dimensions. A complete mold service usually includes product structure review, DFM feedback, mold design, mold steel selection, machining, mold assembly, T1 mold trial, sample review, mold correction, inspection and final mold delivery.
Custom Injection Mold Services = mold design, mold manufacturing, mold trial and mold delivery.
Custom Injection Molding Services = plastic part production after the mold is ready.
For molded part production, visit Custom Injection Molding Services.
Not sure whether your project needs mold service or molding service?
Contact GBM on WhatsAppInjection Mold Services vs Injection Molding Services
Understanding the difference ensures you request the right service for your current project stage.
Injection Mold Services
Focus
Focus on mold design, mold manufacturing, trial, correction and export mold delivery.
Buyer Intent
Buyer needs a custom mold for local or future production.
Main Deliverables
DFM report, mold design, mold steel, mold base, T1 samples, trial report, mold correction, spare parts, mold packing.
Best Fit
New tooling project, export mold project, complex plastic part, production mold preparation.
Injection Molding Services
Focus
Focus on producing molded plastic parts using an approved mold.
Buyer Intent
Buyer needs plastic parts delivered in prototype, low-volume or mass production quantity.
Main Deliverables
Molded plastic parts, material selection, production setup, part inspection, assembly support, packaging and shipment.
Best Fit
Plastic part production, repeated batch orders, low-volume molding, mass production.
Need both mold building and molded parts?
Custom Injection Mold Service Parameters
| Service Scope | DFM review, mold design, plastic injection mold manufacturing, mold assembly, T1 trial, sample inspection, mold correction, export mold delivery |
|---|---|
| Mold Types | Cold runner mold, hot runner mold, multi-cavity mold, family mold, insert mold, overmolding mold, two-shot mold, unscrewing mold, high precision mold |
| Mold Steel Options | P20, 718, H13, S136, NAK80, 2344, 2738 or project-specific steel based on part material, surface requirement and mold life target |
| Mold Base Standard | LKM, HASCO, DME, MISUMI or customer-specified mold standard |
| Processing Methods | CNC machining, EDM, wire cutting, grinding, drilling, polishing, fitting and mold assembly |
| Plastic Materials Supported | ABS, PC, PP, PA6, PA66, POM, PMMA, TPE, TPU, PPS, PEEK, PC/ABS, glass-filled materials and flame-retardant plastics |
| Trial Support | T1 samples, sample photos, trial video when required, defect review, mold correction plan and second trial when needed |
| Inspection Support | Sample appearance check, key dimension inspection, CMM report when required, assembly fit check when mating parts are available |
| Export Delivery | Anti-rust treatment, wooden case packing, spare parts, cooling connectors, ejector pins, mold drawings, sample parts, packing photos and shipment support |
| Project Files Needed | 3D CAD, 2D drawing, material requirement, surface finish, tolerance, annual quantity, target mold life, injection machine information if the mold will be exported |
Send your 3D drawing and mold requirement to request a tooling quote.
Injection Mold Types We Build
GBM builds various mold structures based on your part geometry, material, and production volume needs.
Cold Runner Injection Mold
Use for cost-sensitive projects, certain materials, lower-volume production or parts where runner waste is acceptable.
Hot Runner Injection Mold
Use for multi-cavity production, reduced runner waste, stable filling and higher production efficiency.
Multi-Cavity Injection Mold
Use when the buyer needs higher output, stable cavity balance and lower unit cost in repeated production.
Stack Mold
Use for doubling production output within the same machine size, ideal for high-volume flat or shallow parts.
Aluminum Mold
Use for rapid prototyping and low-volume production, offering faster cooling and reduced tooling lead times.
Overmolding Mold
Use for soft-touch areas, sealing features, TPE/TPU layers and two-material functional parts.
Two-Shot Mold
Use for integrated two-color or two-material parts where assembly reduction and stable bonding are important.
Unscrewing Mold
Use for threaded caps, closures, connectors and plastic parts with internal or external thread features.
High Precision Mold
Use for tight-tolerance plastic parts, connectors, electronic housings and precision functional components.
Tell GBM your part structure, annual quantity and target material. We will suggest a suitable mold type.
DFM Review Before Mold Design
Before mold design starts, GBM reviews the plastic part structure to reduce tooling risk and avoid late steel correction. The DFM review should focus on manufacturability, assembly function, surface requirement and mold action.
DFM Checklist:
- Wall thickness consistency
- Rib thickness & sink mark risk
- Boss strength & screw column
- Draft angle & undercut review
- Parting line position
- Gate type & mark location
- Ejector pin & ejection balance
- Slider, lifter or insert requirement
- Weld line & air trap risk
- Material shrinkage & warpage risk
- Surface texture & polishing
- Assembly fit & CTQ dimensions
Buyer Value: A clear DFM review helps the buyer understand which part features may increase mold cost, trial risk, production defects or later assembly problems.
Send your 3D drawing for DFM review.
Plastic Injection Mold Design Services
Injection mold design should connect part function, material behavior, mold action and production method. GBM designs custom plastic injection molds based on the part geometry, plastic material, cavity number, surface requirement, expected production volume and customer mold standard.
Parting Line Design
Control visible parting marks, undercut handling and mold opening direction.
Gate and Runner Design
Review filling path, weld line position, gate mark location and runner balance.
Cooling Layout
Support cycle stability, shrinkage control, warpage reduction and consistent cavity temperature.
Ejection System
Review ejector pin position, stripper plate, sleeve ejection or lifter ejection to avoid part deformation.
Slider and Lifter Design
Support side holes, clips, undercuts and complex part geometry.
Mold Steel & Insert Design
Choose steel, inserts and wear parts based on material, mold life, surface finish and maintenance needs.
Venting Design
Reduce burn marks, short shots and trapped air on thin ribs or long flow areas.
Surface Finish Planning
Plan polishing, texture, transparent area, high-gloss area and cosmetic surface protection.
Need a mold design plan before tooling starts?
Plastic Injection Mold Manufacturing Process
A systematic approach from drawing review to final mold export.
RFQ and Drawing Review
Check 3D CAD, 2D tolerance, material, annual quantity, surface requirement and mold standard.
DFM Feedback
Review manufacturability risks and confirm part changes before mold design.
Mold Design
Prepare 2D/3D mold design, parting line, gate, cooling, ejection and mold action.
Steel & Mold Base Prep
Confirm mold steel, mold base standard, inserts and heat treatment requirement when needed.
CNC Machining
Machine cavity, core, inserts, plates and mold base features.
EDM and Wire Cutting
Process deep ribs, sharp corners, slots, precision inserts and difficult mold features.
Polishing and Surface Work
Prepare transparent, cosmetic, textured or functional surfaces according to part requirement.
Mold Fitting and Assembly
Fit cavity/core, slider, lifter, ejector system, cooling system and guide components.
T1 Mold Trial
Run first trial samples to check filling, ejection, appearance, dimensions and mold movement.
Correction, Approval & Delivery
Modify mold after trial, confirm samples, prepare spare parts, documents and packing for shipment.
Start your mold manufacturing project with a drawing review.
T1 Mold Trial and Sample Review
T1 mold trial is not only for getting first plastic samples. It is a verification stage for mold movement, filling balance, ejection, surface quality, dimensions, material behavior and correction needs.
T1 Review Points
- • Mold opening & closing movement
- • Slider, lifter & insert movement
- • Filling condition & short shot risk
- • Gate vestige & weld line position
- • Flash on parting line or small features
- • Sink marks around ribs and bosses
- • Warpage after cooling
- • Ejection marks or part deformation
- • Surface scratches, burns or flow marks
- • Key dimensions and assembly fit
- • Cooling cycle & basic process window
- • Mold correction requirement
Buyer Deliverables
- • T1 sample photos
- • T1 molded samples when required
- • Trial feedback
- • Issue list
- • Correction suggestion
- • Inspection report when required
- • Second trial plan if correction is needed
Need T1 samples before mold shipment?
Mold Correction After T1 Trial
After T1 trial, some mold correction may be needed before sample approval or mold shipment. GBM reviews each issue based on part function, appearance, assembly and dimensional requirement.
Sink Mark Correction
Review rib thickness, boss structure, gate location, packing pressure and local steel adjustment.
Warpage Correction
Review cooling balance, part thickness, material shrinkage, ejection and deformation area.
Flash Correction
Review mold fitting, parting line, shut-off surface, clamping condition and material flow.
Short Shot Correction
Review venting, gate size, runner design, melt flow path and injection pressure window.
Dimension Correction
Review shrinkage, steel-safe area, cavity/core dimension and measurement method.
Assembly Fit Correction
Review clips, screw bosses, snap fits, mating parts and tolerance stack-up.
Surface Correction
Review polishing, EDM marks, texture area, burn marks, weld line location and cosmetic zones.
Ejection Correction
Review ejector layout, lifter action, stripper design and part release angle.
Have T1 sample defects?
Send sample photos and inspection notes for review. Our engineers will propose a correction plan.
Export Mold Delivery Checklist
For overseas buyers, mold shipment should not be treated as simple logistics. Before export mold delivery, the mold should be checked for trial condition, sample approval, spare parts, documents, packing protection and receiving factory compatibility.
Mold Condition
- Mold cleaned before shipment
- Anti-rust treatment applied
- Cooling lines checked
- Moving parts lubricated
- Mold nameplate or identification added if required
- Mold weight and size confirmed
Trial and Sample
- T1/T2 samples prepared
- Sample issue list closed or agreed
- Approved sample retained if required
- Trial video or photos provided when required
Inspection & Spare Parts
- Key dimension report
- CMM report (if required)
- Appearance review
- Assembly check
- Ejector pins & Springs
- Cooling connectors
- Wear inserts
- Hot runner spares
Documents & Packing
- 2D/3D mold drawings
- Mold trial record
- Steel/Heat treatment certs
- Maintenance notes
- Wooden case packing
- Mold fixed inside case
- Moisture & rust protection
- Packing photos
Need an export mold handover checklist?
What Affects Custom Injection Mold Cost?
Injection mold cost depends on more than part size. Buyers should evaluate part structure, mold type, material, surface finish, cavity number, mold life and export requirements before comparing quotes.
Part Size & Complexity
Large parts, deep ribs, clips, undercuts and thin walls can increase mold size and machining time.
Mold Type
Cold runner, hot runner, multi-cavity, insert, overmolding and unscrewing molds have different design and hardware costs.
Cavity Number
More cavities can reduce molded part unit cost but increase mold design, machining and balancing difficulty.
Plastic Material
High-temperature, glass-filled, corrosive or transparent materials may require different steel, polishing or cooling design.
Mold Steel & Life
Prototype molds and production molds use different steel choices and expected life planning.
Surface Finish
Polished, transparent, textured, high-gloss or cosmetic surfaces require additional mold surface work.
Tolerance & Inspection
Tight CTQ dimensions may require better machining control, inspection planning and more trial correction.
Export Standard
DME, HASCO, LKM, MISUMI or customer-specific standards can affect mold base, components and delivery documents.
Get a realistic mold cost review
Send your part drawing, material and annual quantity. We will analyze these factors to provide an accurate quote.
Common Problems in Custom Injection Mold Projects
1. The Quote Looks Low but Mold Risk Is Not Explained
Buyer Risk: Later cost increase, delayed trial, repeated correction or mold that cannot run steadily.
GBM Solution: Review DFM risks, mold structure, material, cavity number and surface requirement before quoting.
2. Part Design Is Sent Directly to Tooling Without DFM
Buyer Risk: Sink marks, warpage, undercuts, weak bosses, poor ejection and visible gate marks.
GBM Solution: Check part structure before mold design and confirm changes before steel cutting.
3. Mold Trial Samples Are Not Fully Reviewed
Buyer Risk: The mold is shipped before dimensional, cosmetic or assembly issues are resolved.
GBM Solution: Use T1 samples, issue list, correction plan and inspection feedback before approval.
4. Export Mold Documents Are Incomplete
Buyer Risk: Receiving factory cannot install, maintain or repair the mold efficiently.
GBM Solution: Prepare agreed documents, spare parts, mold photos and packing information before shipment.
5. Mold Standard Does Not Match Buyer's Factory
Buyer Risk: Mold base, components, connectors or injection machine setup do not fit local production.
GBM Solution: Confirm mold standard, machine platen, ejector pattern, hot runner voltage and cooling requirements early.
6. Cosmetic Surface Cannot Meet Product Requirement
Buyer Risk: Visible weld line, polishing marks, texture mismatch or gate marks affect final appearance.
GBM Solution: Plan surface zones, gate location, polishing requirement and texture requirement during design review.
Have a risky mold project?
Why Choose GBM for Custom Injection Mold Services
GBM supports mold design review, tooling manufacture, T1 sample correction and export mold preparation for overseas plastic part projects.
DFM Before Steel Cutting
GBM reviews part structure, material shrinkage, surface requirement and mold action before mold manufacturing starts.
Design Connected to Production
Gate, cooling, ejection, parting line, slider and lifter design are planned based on actual molding risk and part function.
Tooling Manufacturing Support
The service covers CNC, EDM, wire cutting, polishing, fitting, assembly and mold trial coordination.
T1 Sample & Correction Feedback
GBM checks first trial samples for filling, ejection, appearance, dimensions and functional risks before mold approval.
Export Mold Preparation
For overseas projects, GBM can prepare mold packing, spare parts, trial samples, photos and documents according to project requirements.
Mold and Molding Connection
If customers need molded plastic parts after mold approval, GBM can also support injection molding production through a separate service flow.
Custom Injection Molding Services →Need a mold review before tooling starts? Send your drawing and project requirement to GBM.
Quality Control for Injection Mold Manufacturing
Injection mold quality control should cover more than final sample appearance. GBM checks mold components, machining quality, assembly movement, trial sample condition and key dimensions according to project requirements.
Inspection Checklist
- Mold steel & base confirmation
- Core & cavity machining check
- Electrode & EDM area review
- Slider, lifter & insert movement
- Ejector system movement check
- Cooling channel connection
- Parting line & shut-off surface
- Surface polish or texture area
- T1 sample appearance review
- Key dimension inspection
- CMM report when required
- Assembly fit check
- Trial issue list follow-up
- Packing inspection before shipment
Need inspection documents before mold shipment?
Contact GBM
Applications for Custom Injection Molds
Automotive Injection Molds
For interior trim, exterior parts, clips, brackets, covers and functional components. Focus on warpage control, assembly fit, heat resistance and repeated production stability.
Learn More →
Electronics & Electrical Molds
For housings, connector shells, switch covers, small brackets and precision plastic components. Focus on flame-retardant material, screw bosses, thin ribs and PCB fit.
Packaging Molds
For caps, lids, trays, containers, cosmetic packaging and thin-wall packaging parts. Focus on cycle time, ejection, cooling and surface finish.
Learn More →
Medical Plastic Part Molds
For device housings, trays, covers and precision medical-related plastic parts. Focus on material, inspection, clean handling and dimensional stability.
Consumer Product Molds
For appliance covers, handles, cosmetic covers, small shells and assembled plastic parts. Focus on surface finish, color, texture, clips and assembly feel.
Industrial Component Molds
For gears, bushings, housings, covers, structural parts and functional plastic components. Focus on wear resistance, tolerance, material strength and long-term use.
High Precision Plastic Molds
For connectors, small precision components, optical-related parts and tight-tolerance plastic features.
Learn More →Check Mold Feasibility
Send your application, material and part drawing to check mold feasibility.
How to Choose a Custom Injection Mold Service Provider
Check Whether DFM Is Included
The supplier should review wall thickness, draft, ribs, bosses, undercuts, gate marks, ejection and assembly before quoting or cutting steel.
Check Mold Design Capability
The supplier should explain parting line, gate, runner, cooling, ejection, slider, lifter and insert strategy clearly.
Check Manufacturing Process
Ask whether CNC, EDM, wire cutting, polishing, fitting and assembly are controlled within a clear tooling schedule.
Check T1 Trial and Correction Support
A reliable supplier should not ship the mold only after first samples. The T1 issue list and correction plan should be reviewed.
Check Inspection Deliverables
Ask whether the supplier can provide sample inspection, key dimension report, CMM report when needed and sample approval records.
Check Export Mold Experience
For overseas projects, confirm mold standard, spare parts, cooling connectors, machine compatibility, packing and documents.
Check Communication Method
For international buyers, sample photos, trial videos, progress photos, packing photos and clear issue lists reduce project risk.
Buyer Note: Do not choose an injection mold service only by the lowest mold price. A mold quote should be judged together with DFM risk, steel choice, mold structure, trial support, correction responsibility, inspection deliverables and export readiness.
Want GBM to review whether your part is ready for tooling?
Related Mold and Injection Molding Services
Explore related mold design, mold manufacturing and plastic injection molding services for different materials, structures and production needs.
Custom Injection Molding Services
For molded plastic part production after mold approval.
View Service 02Cold Runner Mold
For cost-sensitive injection mold projects.
View Service 03Overmolding Mold Manufacturer
For TPE/TPU overmolding and multi-material parts.
View Service 04High Precision Mold
For tight-tolerance plastic parts and connectors.
View Service 05ABS Injection Mold
For ABS housings, covers, and structural components.
View Service 06Polycarbonate Injection Mold
For PC housings and transparent covers.
View Service 07PP Injection Mold Manufacturer
For PP caps, containers and living hinges.
View Service 08Packaging Mold
For caps, lids, trays, and thin-wall packaging.
View ServiceLooking for the right mold or molding service for your project? Explore the related pages or send your drawing to GBM for review.
Custom Injection Mold Services FAQ
What are custom injection mold services?
What is the difference between injection mold services and injection molding services?
What files are needed for an injection mold quote?
Can GBM provide DFM review before mold design?
What mold types can GBM build?
What is T1 mold trial?
Will the mold need correction after T1?
Can GBM make export injection molds?
What affects injection mold cost?
How do I choose an injection mold service provider?
Can GBM support molded plastic parts after mold approval?
Can GBM provide mold drawings and spare parts?
What standards can be used for export molds?
How can I reduce mold tooling risk?
Ready to Tool Up Your Custom Injection Mold Project?
Upload your CAD files, tolerances, material specs, and tooling requirements. We'll assess shrinkage risks, mold structure and DFM issues before sending a tooling quote.
