Custom Plastic
Injection Molding Services
Manufacture custom plastic parts from your drawings—with in-house DFM, production tooling, injection molding and part inspection at our Shenzhen facility.
Custom Injection-Molded Parts
Made to your drawings, material specifications and production requirements.
Your Design
Small or large, simple or complex.
Your Material & Finish
Specified resins, colors and textures.
Your Production Plan
Trial batches and repeat injection molding production, planned around your delivery schedule.
New or Existing Tooling
Develop a new production mold or transfer your existing mold to Flymould.
Sumitomo · JSW · Toshiba · Haitian · KraussMaffei
Injection Molding Equipment
As a plastic injection molding manufacturer, we match the press and setup to your part.
- Injection moldingWe match our 41 presses (16 electric, 25 hydraulic) to mold size, resin and shot size.
- Resin preparationKawata and Matsui dryers prepare resin, with moisture checks as needed.
- Temperature controlMold and hot runner temperature controls keep molding conditions consistent.
- Part handlingHARMO, Yushin and Alfa take-out robots keep part removal consistent.
- Dimensional inspectionCMM and optical measurement verify critical dimensions.
Equipment for special project requirements
Injection Molding Materials
We help select the resin grade based on how your part will be used, including heat, loads, chemical exposure, appearance and cost. If your part has specific performance requirements, we use the resin supplier’s data to help choose a suitable grade.
Material Supply
- You specify, we source
Tell us your required resin grade and we will source it to your specification.
- You supply, we mold
Ship your resin to Flymould and we will use it to mold your parts.
Material & Appearance Checks
- Color & finish
Share a color code, color chip or reference part. Confirm the color and surface finish on molded samples during trials.
- Incoming resin inspection
For both sourced and customer-supplied resin, we check the grade, lot number, packaging and agreed documents. We check moisture content or melt flow rate (MFR) when specified.
PC Injection Molding
Transparent and functional components.
Makrolon 2405 / Rx2430PP Injection Molding
Caps and application-specific components.
HIVALR 521054-PPHDPE Injection Molding
Caps and multi-cavity part projects.
T5070POM Injection Molding
Clamps and functional features.
HOSTAFORM MT8U01COC Injection Molding
Transparent component projects.
Transparent COC; grade by projectOther Injection Molding Materials
PEEK · PPS · PEI · ABS · PE · PS · TPE
PEEK injection molding and other specialty grades are reviewed by project.Material selection & documentation
DFM for Injection Molding
& In-House Tooling
Find the risks. Agree the design. Build the mold.
- DFM reviewCheck wall thickness, draft, undercuts, ribs, bosses, gates, parting lines and ejection. The DFM report flags risks and recommends changes.
- Moldflow analysis as neededCheck filling, weld lines, trapped air and warpage to guide design decisions. Moldflow reports are available on request.
- Production mold approvalApprove the 2D layout and 3D mold design, including cavity layout, mold construction, steel, cooling and gating.
- In-house mold build & trialsBuild and assemble the mold using CNC, EDM and wire cutting. Inspect trial samples and document any corrections needed.
DFM findings and mold design approval establish the basis for tooling.
Your Injection Molding Project:
Steps & Lead Time
See what happens after you send drawings, what you receive and where your approval is needed.
RFQ & Quotation
Review drawings, resin, quantity and quality requirements.
DFM & Mold Design
Review manufacturing risks and prepare the 2D/3D mold design.
Mold Manufacturing
Machine, assemble and check the mold against the approved design.
Trials & Sample Review
Mold sample parts, inspect the agreed features and address trial findings.
Production Release
Agree the sample acceptance, inspection criteria and production conditions.
Production & Delivery
Schedule resin, mold the parts, inspect, pack and prepare shipment.
*Indicative planning timings. Quotation and design timing start after the required inputs are available; tooling starts after design approval and project release. Corrections, customer approval, validation and transport can change the schedule.
Send it with your drawings so the quotation can address the required milestones.
Inspection & Production
Control
Agree the requirements before production. Check the parts against them.
- DimensionsCMM, optical measurement and gauges. Results linked to drawing features.
- Appearance & functionCheck color, surfaces, assembly and agreed functional requirements.
- Repeat ordersApproved molding conditions, inspection checkpoints and batch records.
- FAI, PPAP & validation documentsDiscuss FAI, PPAP, Cpk/Ppk studies or IQ/OQ/PQ support at quotation. Define the required scope, methods and acceptance criteria for your project. Tolerances are agreed for the actual resin, part and feature.
Packaging & Delivery
Protect the part. Identify the batch. Agree the shipping plan.
Part Protection
We agree on pack quantities and protective packaging with you. Where needed, we separate parts to prevent scratches and keep them clean in transit.
Labels & Documents
We label each carton with the part number and batch ID, and provide the agreed inspection or material records so your team can verify what arrived.
Delivery Plan
Tell us where and when you need the parts. Before shipping, we confirm the dispatch date, who arranges freight and which transport costs each side covers, so your team can plan for receipt.
Industries We Serve
Medical Injection Molding
Connectors, caps and device housings. Cleanroom and validation scope by project.
Automotive Injection Molding
Lighting, interior and functional parts. Appearance, fit and PPAP requirements.
Electronics Injection Molding
Custom plastic electronic housings and enclosures. Color, finish and assembly fit.
Energy & EV Charging Components
Housings, connector parts and structures. Material grades and service conditions.
Plastic Parts for Data Center Equipment
Enclosures and cable-management components. Drawing-based project review.
Aerospace Plastic Components
Application review for custom parts. Materials, traceability and qualification agreed first.
Custom Injection Molding FAQs
What affects the cost of custom injection molding?
Resin, part weight, mold complexity, cavity count, molding cycle, order quantity, inspection and packaging.
Can you mold small parts and large housings?
We assess a broad size and weight range across 50–1,500-ton machines. Send the drawing to confirm mold and machine fit.
Can you use my existing injection mold?
Yes, subject to condition and equipment checks. Share the mold details, part drawings and previous process records.
Do you offer cleanroom and 2K injection molding?
Yes, subject to project review. Cleanroom scope covers the agreed operations; 2K & multi-component molding depends on the materials, geometry and tooling.