Quality Control

IQC (Incoming Quality Control)

At the IQC stage, we mainly inspect incoming materials from suppliers for appearance, dimensions, tolerances, material, and functionality. Common methods include sampling inspection, drawing comparison, and certificate verification.

Equipment and methods used include:

Calipers, Micrometers: Manual measurement of key dimensions
Height Gauge: Measuring vertical heights
Profile Projector: Inspecting complex profiles and geometric tolerances
Hardness Tester: Verifying material hardness
Function Testers (e.g., continuity testers, air tightness testers): Checking incoming material functionality
Light Box for Visual Inspection: Identifying scratches, color differences, impurities, etc.

Sampling ratios are set according to AQL standards. All incoming materials must pass inspection before being stored in inventory.

IPQC (In-Process Quality Control)

IPQC is conducted throughout the entire production process, focusing on process stability, deviations, and operator consistency to ensure each step outputs qualified semi-finished products. Typical procedures include First Article Inspection (FAI),process patrol inspections, sampling of key dimensions, and full inspection of critical functions, such as leaking test.

Common methods and equipment include:

First Article Inspection (FAI): Full dimensional check and confirmation of the first produced piece
Inspection Records: Recording production parameters, test results, equipment status, and process consistency on-site
Calipers, Pin Gauges, Plug Gauges: Inspecting dimensional fits and tolerances
Function Testers (e.g., continuity testers, In-house Developed Leak Tester, automated testing equipment)

We have a dedicated team of professional Quality Engineers (QEs) focused on analyzing and resolving quality issues. They respond quickly to anomalies, lead root cause investigations, implement corrective and preventive actions, and are committed to continuously improving product quality and customer satisfaction.

OQC – Outgoing Quality Control

OQC is the final quality checkpoint to ensure that 100% of outgoing products meet customer specifications. We perform final inspections on appearance, functionality,dimensions, and packaging.

Typical items and equipment include:

Full Visual Inspection: Detecting scratches, deformation, contamination, and assembly defects
Function Test Bench: Simulating customer usage scenarios to verify product functionality
Precision Measuring Tools: Re-checking key dimensions
Weight and Dimension Check: Ensuring packaging complies with shipping requirements
Packaging Acceptance Standard Card: Verifying labels, manuals, and packaging methods
Product Release: Final inspection of the product; release form is filled out after passing

Leak Tester

What is Leak Test System

In the medical device industry, airtightness and unobstructed flow path are directly linked to product safety, functional stability, and even patient lives. Therefore, the precision and adaptability of testing equipment are critically important.

At Kingsin, we specialize in the design and manufacturing of customized leak test systems that can handle complex structures and a high number of connection interfaces with precision and reliability. Most currently available test systems on the market lack both reliability and efficiency.

Applications of the leak test system

This system is specifically designed to perform comprehensive sealing and flow performance validation across a wide range of application scenarios.

Precision Positive and Negative Pressure Testing

It supports negative pressure testing down to -500 kPa and positive pressure up to +100 kPa, with a maximum pressure resistance of 1000 kPa—making it ideal for strength testing or high-pressure sealing validation.
ulti-Channel Automated Testing

It is capable of simultaneous multi-channel testing to significantly improve efficiency, making it perfectly suited for low-volume, high-mix production models.
Customized Fixtures and Pneumatic Circuits

Our tailored sealing fixtures and air circuit layouts are designed based on each individual product’s structure to ensure testing precision across various interface types.
Digital Data Management

Test data is automatically uploaded to the MES system and linked via barcode scanning, enabling full-process traceability and quality control.

System capabilities

Core Technologies with Full Control

From pneumatic control to multi-channel coordinated testing, all key modules of our system are independently developed to ensure high precision and reliability.
Rapid Customization Capabilities

Our quick customized design and build leak test systems can meet customers’ diverse testing and scheduling requirements.
Intelligent Manufacturing and Data Integration

Seamless integration with automated testing and the MES system enables an efficient, transparent, and fully traceable digital quality control process.
Reinforced High-End Manufacturing Capability

A closed-loop system—from design support to quality inspection—ensures that every customer’s product delivers high performance, regulatory compliance, and reliability throughout its expected lifetime.