Quality Control
At SHENZHOU, quality control is integrated throughout the manufacturing process-from incoming component inspection and precision machining to assembly verification, functional testing, and pre-shipment inspection.
Rather than relying on a single final inspection, every stage of production is checked to help ensure that each injection molding machine is assembled according to its technical specifications and performs reliably under normal operating conditions.
Our quality management system follows documented production procedures and is supported by ISO 9001 certification, helping maintain consistency across manufacturing, inspection, and customer service.
Quality Management System
Our quality management system covers:
- Incoming material inspection
- Machining process control
- Assembly inspection
- Functional verification
- Machine performance testing
- Packaging inspection
- Customer acceptance before shipment
Production and inspection records are maintained throughout manufacturing to support process consistency and product traceability.
Incoming Component Inspection
Before entering production, key purchased components are checked to verify that they match the required specifications.
Inspection typically includes:
- Hydraulic pumps
- Hydraulic valves
- Hydraulic cylinders
- Servo system components
- Electrical components
- Sensors
- Sealing components
- Fasteners
- Electrical cables
- Control cabinet accessories
Inspection personnel verify model specifications, appearance, quantity, and basic condition before components enter the assembly process.
For key hydraulic, electrical, and sealing components, SHENZHOU uses products supplied by established manufacturers to support stable machine operation and long-term reliability.
Precision Machining Inspection
During machining, critical structural components are inspected throughout production.
Inspection focuses on:
- Machine frame machining
- Platen flatness
- Tie-bar hole positioning
- Guide rail machining
- Mounting surface accuracy
- Machined surface condition
- Dimensional consistency
Assembly Process Verification
During assembly, technicians verify:
- Mechanical alignment
- Fastener installation
- Lubrication system installation
- Injection unit assembly
- Clamping mechanism movement
- Hydraulic pipe routing
- Electrical cabinet installation
- Safety guard installation
Hydraulic System Inspection
The hydraulic system plays an important role in injection pressure, clamping force, and machine stability.
Before shipment, hydraulic performance is evaluated through operational testing.
Inspection includes:
- Hydraulic pressure stability
- Oil leakage inspection
- Cylinder movement
- Pump operation
- Valve response
- Pressure holding performance
- Oil circulation
- Hydraulic temperature during operation
The objective is to confirm stable hydraulic performance under normal production conditions before equipment leaves the factory.
Electrical System Verification
Electrical systems are inspected to confirm correct installation and functional operation.
Testing typically includes:
- Controller operation
- Servo motor response
- Sensor signals
- Limit switches
- Emergency stop system
- Safety interlocks
- Electrical cabinet wiring
- Display functions
- Alarm system verification
Electrical inspections are completed before machine performance testing begins.
Machine Function Testing
Every completed machine undergoes operational testing before delivery.
Testing verifies the coordinated operation of major machine functions, including:
- Mold opening and closing
- Clamping movement
- Injection movement
- Plasticizing rotation
- Screw recovery
- Ejector operation
- Core pull functions (where applicable)
- Machine parameter settings
- Control system response
Machine Performance Testing
After functional verification, machine operating performance is evaluated under working conditions.
Performance testing may include:
- Clamping force verification
- Injection pressure consistency
- Injection speed response
- Repeatability of machine movements
- Servo response
- Hydraulic stability
- Control system operation
Depending on machine configuration and project requirements, additional testing may be carried out before customer acceptance.
Continuous Running Inspection
Machines are operated continuously before shipment to observe overall operating stability.
During this stage, technicians monitor:
- Hydraulic pressure stability
- Oil temperature
- Machine noise
- Servo operation
- System alarms
- Movement repeatability
- Overall machine response
Customer Inspection Before Shipment
Customers are welcome to inspect equipment before shipment.
Inspection options include:
Factory visits
01
On-site machine demonstrations
02
Live video inspection
03
Machine testing videos
04
Remote acceptance meetings
05
During customer inspection, machine operation can be demonstrated according to the agreed project configuration.
This allows customers to confirm equipment performance before shipment begins.
Inspection Records and Technical Documentation
To support equipment delivery and future operation, relevant technical documents can be provided with the machine.
Depending on the project, documentation may include:
- Operation manual
- Electrical drawings
- Hydraulic drawings
- Machine parameter information
- Packing list
- Spare parts list
- Maintenance recommendations
- Inspection records
These documents assist customers during installation, commissioning, maintenance, and future equipment servicing.
Packaging Inspection
Before loading, each machine undergoes a final inspection to verify shipment readiness.
Checks include:
- Machine appearance
- Surface protection
- Anti-rust treatment where required
- Accessory confirmation
- Documentation verification
- Protective packaging
- Wooden case or export packaging (if applicable)
- Shipping marks
- Container loading preparation
The packaging method may be adjusted according to transportation method, destination, and customer requirements.
ISO 9001 Certified Manufacturing
SHENZHOU operates under an ISO 9001 quality management system certified by TÜV Germany.
