Quality Control

Certifications

Certified under multiple international quality management standards to ensure products meet industry benchmarks and customer requirements.

ISO001

Quality Management System Certification

First certified under ISO9001 in 2004, currently adhering to ISO9001:2015 standards, with a robust quality management process established.

IATF16949

Automotive Quality System Certification

Achieved IATF 16949:202016 automotive quality management system certification in 2024, meeting the rigorous demands of the automotive industry.

RoHS

Environmental Certification

Complies with EU RoHS environmental directive; all materials certified by third-party testing.

ISO14001

Environmental Management System Certification

Certified under GB/T24001-2016 environmental management system to standardize production environment management and implement green production requirements.

ISO5001

Occupational Health and Safety Management System Certification

Achieved ISO 45001:2018 occupational health and safety management system certification to enhance workplace safety management.

IECQ

IECQ CB Scheme Certificate for Hazardous Substance Process Management

Obtain IECQ certification to strictly control hazardous substances in products and meet electronic industry supply chain requirements.

Quality Management System

Establish a comprehensive quality control system spanning from raw material procurement to finished product shipment, ensuring stable and reliable product quality.

End-to-end quality control

1

Raw Material Production

Start production upon raw material confirmation to enter the mass production phase.

2

Multi-level Process Inspection

The production process includes first-article inspection, operator self-checks, inter-process checks, on-site patrols, and joint sampling to ensure quality across multiple dimensions.

3

Abnormal Process Debugging

Conduct process audits and optimize parameters when anomalies are detected, while driving simultaneous improvements in quality and workshop operations.

4

Final Product Inspection Decision

Complete final inspection: pass items proceed normally; non-conforming items are marked, isolated, and routed for rework, re-inspection, or scrap.

5

Closed-loop inspection management

Reworked products must pass re-inspection before proceeding; unrepairable items are scrapped to ensure a complete quality loop.

Quality Management System

Device detection

Equipped with comprehensive testing equipment to fully inspect product dimensions, materials, and performance.

Constant Temperature and Humidity Test Chamber

Climate Chamber

Conduct temperature and humidity cycling aging tests to evaluate the environmental aging resistance and long-term stability of heat-shrink tubing.

Thermal Shock Chamber

Thermal Shock Test Chamber

High-Low Temperature Rapid Thermal Shock Test: Verifies structural and performance reliability under extreme temperature fluctuation conditions.

Dielectric Strength Tester

Dielectric Strength Tester

Dielectric strength test: verify bushing insulation integrity to meet safety requirements for electrical components.

Tensile Tester

Tensile Tester

Perform tensile and elongation at break tests to evaluate the casing's mechanical tensile strength and physical ductility.

Measurement Tools

Measuring Tools

Precision metrology and inspection to control critical dimensional tolerances of casing wall thickness, diameter, and bend radius, ensuring dimensional consistency.

High-Temperature Oven

High-Temperature Oven

Simulate high-temperature conditions to measure sleeve thermal shrinkage and verify the product's heat-shrink performance.

Quality Commitment

We guarantee products that meet quality standards, with a pass rate of over 99.9%. In the event of any quality issues, we will respond immediately and provide a solution to ensure your interests are fully protected.

99.9%
Product pass rate
24h
Quality Response
100%
Factory Inspection
24h
Customer Complaint Response

Contact Us

2512915627@qq.com
Zhouzhuang Village, Binhai New Area, Haian City, Nantong City, Jiangsu Province, Group 8

About Us

TINGSUN is a leading manufacturer specializing in aluminum electrolytic capacitors and PET/PVC heat shrinkable tubing, with nearly 30 years of expertise. We offer custom development solutions and provide reliable supply for the automotive electronics, new energy, and consumer electronics industries.

© 2026 Jiangsu Tingsun Electronic Materials Joint-Stock Co., Ltd. All rights reserved. ICP License No. 2021053073