Custom Plastic Injection Molding Services

JBRplas operates a 24/7 injection molding facility in Shenzhen with over 30 presses ranging from 60 to 1,600 tonnes clamping force. Whether you need 500 prototype parts or 5 million production units per year, we have the capacity, tooling expertise, and quality systems to deliver consistently, on time.

Our molding services are designed around the needs of OEM buyers — engineers and procurement teams who need a supplier that holds tolerances, responds quickly, and ships product on the agreed schedule. We don’t just run parts; we manage the process.

Injection Molding Capabilities

Press Capacity

Clamping Force	Presses	Max Shot Weight	Typical Part Weight
60T – 160T	12	Up to 150g	5g – 120g
200T – 500T	10	Up to 800g	100g – 600g
600T – 1,000T	5	Up to 3,000g	500g – 2,500g
1,100T – 1,600T	3	Up to 8,000g	1,000g – 6,000g

All presses are equipped with:

Servo-hydraulic or all-electric drive systems
Real-time process monitoring (injection pressure, fill time, pack pressure)
Automated part removal robots on 80% of presses
Hot runner temperature controllers (for hot runner tooling)

Dimensional Tolerances

Tolerance Class	Achievable Tolerance	Typical Application
Standard	±0.15mm	General industrial parts
Precision	±0.05mm	Connector housings, snap-fit enclosures
High precision	±0.02mm	Optical, medical, automotive ADAS

Materials Expertise

Engineering Resins

Material	Key Properties	Typical Applications
ABS	Impact resistance, surface finish	Consumer electronics, enclosures
PC	Optical clarity, high impact	Lenses, safety equipment, lighting
PC/ABS	Heat + impact balance	Automotive interior, power tools
PA6 / PA66	Strength, wear resistance	Gears, brackets, clips
PA66-GF30	High stiffness, dimensional stability	Structural automotive parts
POM (Acetal)	Low friction, precision	Gears, cams, bearings
PBT-GF	Heat resistance, electrical	Connectors, sensor housings
PPO/PPE	Heat and hydrolysis resistance	Water-contact, medical
PEEK	Extreme heat and chemical resistance	Aerospace, medical implants

Commodity Resins

PP, PE (HDPE / LDPE), PS, GPPS, HIPS, SAN, PVC (rigid and flexible)

Specialty Grades

Flame retardant — UL94 V-0, V-1, V-2 rated grades (ABS FR, PC FR, PA FR)
Glass-filled — GF10 to GF50 in PA, PBT, POM, PP
UV-stabilized — outdoor weathering grades
Food-contact — FDA / EU 10/2011 compliant PP, PE, PC
Medical-grade — USP Class VI, ISO 10993 biocompatibility tested
Conductive / ESD — carbon-filled or carbon-fibre grades for EMI shielding

Quality Control

Every production batch at JBRplas goes through a documented quality control process:

In-Process Inspection

First-off inspection at the start of every production run
Statistical process control (SPC) monitoring of critical dimensions
Inline vision systems for flash, short shots, sink marks
Process parameter logging (injection pressure, temperature, cycle time) for every shot

Outgoing Inspection

Dimensional verification on CMM for critical dimensions
Visual inspection under standardized lighting
AQL sampling per ANSI/ASQ Z1.4 (Level II, AQL 1.0 for critical dimensions)
Material certificates traceable to resin lot numbers

Documentation Available

First Article Inspection (FAI) report
Measurement System Analysis (MSA)
Control Plan and PFMEA
PPAP Level 3 documentation (for automotive customers)
Certificate of Conformance (CoC) per shipment

Secondary Processes

Process	Details
Assembly	Manual and semi-automated sub-assembly
Ultrasonic welding	Horn sizes 20–40mm, weld strength testing
Heat staking / press fitting	Threaded inserts, metal bushing installation
Pad printing	Up to 4 colours, all surfaces
Spray painting	RAL / Pantone matched, primer + topcoat
Chrome plating	Decorative and functional plating
Laser engraving	Serial numbers, logos, QR codes
Custom packaging	Blister, clamshell, retail box, bulk tray

Production Volumes

Volume Category	Annual Quantity	Tooling Type	Typical Cycle Time
Prototype / Bridge	500 – 10,000	Aluminium or P20 soft tool	Longer
Low volume	10,000 – 100,000	Single-cavity P20	Standard
Medium volume	100K – 1M	2–4 cavity H13	Optimized
High volume	1M +	High-cavitation, hot runner	Minimum cycle

Minimum order quantity: No formal MOQ. We run low-volume prototype batches from 500 pieces. Production economics favour volumes above 10,000 pieces per year.

Lead Times

Phase	Duration
RFQ response	Within 24 hours
T1 samples (from mold approval)	18–25 business days
First production run	5–10 business days from sample approval
Repeat orders (stocked mold)	7–15 business days

Frequently Asked Questions

What is the minimum order quantity? We have no formal MOQ. We regularly produce prototype batches of 500–2,000 pieces for product validation. Production economics improve significantly above 10,000 pieces per year.

Can you match an existing part from another supplier? Yes. Provide a sample part and your 2D drawing. We can reverse-engineer and produce a matching mold.

Do you offer consignment / Kanban supply? Yes. We can hold a finished goods buffer and ship on a Kanban call-off for customers with steady monthly demand.

What is your defect rate? Our production defect rate is below 0.3% for established production programs. New program ramp-up targets <1% within the first 90 days of production.

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Custom Plastic Injection Molding Services China | JBRplas Shenzhen Factory