Automatic packaging machine quality appraisal

automatic packaging machine uses the core principle of heat sealing control and motion positioning synergy. By optimizing temperature control accuracy, sealing pressure uniformity and feeding positioning error, it achieves synergy of packaging sealing strength, appearance flatness and production efficiency. It is widely used in fields such as food, medicine, electronic components and daily chemical products. In the food industry, it is used for leak-proof sealing of vacuum packaging; in the pharmaceutical field, it meets the aseptic packaging requirements of blister packaging; in the electronics manufacturing industry, it ensures the precise sealing and cutting of anti-static bags. Compared with traditional equipment, automatic packaging machines have the characteristics of fast temperature control response, multi-material adaptability and intelligent detection. They are the core equipment of automated packaging production lines.

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

As the requirements for refinement of packaging processes increase, related quality dispute cases have increased significantly. The judicial dispute focuses on:

1, dispute over performance indicators: the sealing strength does not meet the standard, and the sealing temperature fluctuation exceeds the standard;

2, material defects: the resistivity deviation of the nickel-chromium alloy of the heating element, and the wear resistance of the silicone bead is insufficient;

3, process problems: synchronization error of the feeding mechanism, PID parameter imbalance leading to temperature overshoot;

4, contract performance dispute: key modules (such as servo drive system, infrared temperature sensor) do not comply with the technical agreement.

automatic packaging machines usually uses the following technical methods:

1. Appearance inspection: The appraiser conducts a detailed appearance inspection of the equipment to check whether there are scratches, deformations, rust and other quality defects.

2. Functional test: Functionally test the device, including starting, running, stopping, etc., to check whether the device can work normally.

3. Accuracy test: Use precision instruments to measure the accuracy of equipment packaging, including dimensional deviation, weight error, etc.

4. Material testing: Conduct material testing on key components of the equipment, including material, strength, hardness, etc., to determine whether the materials meet the requirements.

A food factory of the applicant signed a "Fully Automatic Vacuum Sealing Machine Purchase Contract" with an equipment manufacturer of the respondent, and it was agreed that the sealing strength should be ≥40N/15mm. After being put into production, the packaging air leakage rate exceeded 5%, and the manufacturer argued that it was caused by poor quality of film materials.

identification analysis results:

The quality analysis expert group discussed and comprehensively analyzed the relevant information of the "automatic packaging machine", contract technical agreement, on-site inspection case materials and other data, and made the following quality analysis conclusions See:

The temperature distribution of the heating plate of the automatic packaging machine involved in the case is uneven (the temperature difference between the center and the edge reaches 8°C). The hardness of the silicone bead is only Shore A50 (protocol ≥ A70), resulting in pressure transmission failure; the feeding servo positioning error accumulates 0.8mm (protocol ≤ 0.3mm), and the sealing position is offset.

The appraisal conclusion determined that defects in the temperature control system and mechanical structure were the main causes of the leak.

Automatic packaging machine quality appraisal report should include:

1, appraisal purpose (such as seal failure attribution, performance verification) and reference standards;

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

3, detection method and equipment list ( Such as tensile testing machine, thermal imaging camera);

4, analysis of detection data and failure correlation (such as the impact of temperature uniformity on sealing strength);