Plastic assembly equipment quality appraisal

plastic assembly equipment uses hot melt welding, ultrasonic welding or mechanical pressing as the core process. By optimizing temperature control, pressure accuracy and cycle time, it achieves the synergy of joint strength, dimensional accuracy and production efficiency of plastic parts. It is widely used in fields such as auto parts, electronic packaging, medical equipment and daily necessities manufacturing. In the welding of automobile lampshades, it is used for high-strength bonding of PC/ABS materials; in the field of medical consumables, it meets the sterile packaging requirements of PP/PVC; in precision electronics, it ensures the non-destructive assembly of micro connectors. Compared with traditional equipment, plastic assembly equipment has the characteristics of multi-process compatibility (hot plate/vibration/laser welding), intelligent monitoring and energy consumption optimization, and is a key equipment for the efficient production of plastic products.

Zhongke Testing is a product quality appraisal service organization registered with the court. It can provide quality appraisal services for plastic assembly equipment. It has a professional appraisal team and advanced instruments and equipment to provide fair and accurate appraisal results for the quality appraisal of plastic assembly equipment.

As the complexity of plastic products increases, related quality dispute cases have increased significantly. The judicial dispute focuses on:

1, performance indicator dispute: insufficient welding strength, equipment utilization rate;

2, material defects: poor wear resistance of hot plate coating, ultrasonic transducer efficiency attenuation;

3, process issues: temperature field uniformity deviation, servo system positioning accuracy;

4, contract performance dispute: core modules (such as imported PLC controllers, high-precision pressure sensors) do not comply with the technical agreement.

1, sensory inspection method

The sensory inspection method uses human vision, hearing, touch and other senses to check the appearance, operating sound, vibration, etc. of the equipment, and initially determine whether there are obvious quality problems in the equipment. For example, by observing whether there are scratches, cracks and other defects on the surface of the equipment, listening for abnormal sounds when the equipment is running, and touching the equipment for abnormal vibrations.

2, measurement and detection method

The measurement and detection method uses various measuring tools and instruments to measure and detect the size, accuracy, performance and other parameters of the equipment to determine whether the equipment meets the requirements. For example, measuring tools such as calipers and micrometers are used to measure the dimensions of equipment parts, and instruments such as sensors and testers are used to detect the performance indicators of equipment.

3, simulation test method

An auto parts factory of the applicant signed a "PP Bumper Welding Equipment Purchase Contract" with an equipment manufacturer of the respondent, and it was agreed that the welding strength should be ≥20MPa. After being put into production, the cracking rate of the product exceeded 10%, and the manufacturer argued that it was caused by batch differences in materials.

identification analysis results:

The quality analysis expert group discussed and comprehensively analyzed the relevant information of "Plastic Assembly Equipment", contract technical agreements, on-site inspection case materials and other data, and made the following Quality analysis opinion below:

The hot plate temperature of the plastic assembly equipment involved in the case fluctuates ±8°C (agreement ±2°C), and the welding pressure deviation is ±0.3MPa (agreement ±0.1MPa); the output power of the transducer is attenuated by 30% (agreement ≤10%), resulting in insufficient energy input.

The appraisal conclusion concluded that defects in the temperature control system and transducer were the main causes of the failure.

Plastic assembly equipment quality appraisal report should include:

1, appraisal purpose (such as product failure attribution, contract compliance verification) and reference standards;

2, involved equipment model, control system version, production log;

3, detection method and equipment clearance