How to conduct testing and quality control of blow molded products in Dalian?

The production process and technology of blow molding products in Dalian involve multiple aspects such as raw material selection, extrusion blow molding, mold design, mold temperature control, and gas path control. Only when these links are reasonably controlled and implemented can high-quality and compliant blow molding products be produced. In the future development, with the advancement of technology and continuous innovation of processes, blow molding technology will be further improved, providing more possibilities and potential for the development of the plastic products industry.

Extrusion blow molding process: Plastic particles are first heated to a molten state in an extruder, and then extruded through an extruder head to form a continuous tubular billet. Under the action of gravity or traction device, the billet hangs down and falls into the blow molding mold. At this time, the mold is closed, and compressed air is introduced into the billet to expand and adhere to the inner wall of the mold cavity under the action of air pressure. After cooling and solidification, the mold is opened to take out the product, and the hollow blow molding product is obtained. The extrusion blow molding process is suitable for producing various specifications of hollow containers and large blow molded products, such as garbage cans, large industrial storage tanks, etc. Its advantages are low equipment cost, high production efficiency, and the ability to process various plastic materials; The disadvantage is that the wall thickness uniformity of the product is relatively poor, and the dimensional accuracy is not as high as that of injection blow molded products.

How to conduct testing and quality control of blow molded products in Dalian?

The testing and quality control of blow molded products are very important, as they directly affect the quality of the products and customer satisfaction. Here are some common testing and quality control methods:

Measuring product dimensions: By using tools such as calipers and gauges to measure whether the dimensions of the product meet the design requirements, ensuring the accuracy of the product dimensions.

Product appearance inspection: Check the surface of the product for bubbles, defects, color differences, and other issues by visual inspection or using tools such as magnifying glasses to ensure a perfect appearance.

Thickness measurement: By using a thickness measuring instrument to check whether the wall thickness of the product is uniform, the quality stability of the product is ensured.

Tensile, bending and other mechanical performance tests: By conducting tensile, bending and other mechanical performance tests in the laboratory, the mechanical properties of the product are tested to see if they meet the requirements.

Impact testing: The impact strength of the product is tested using impact testing instruments to ensure its impact resistance performance.

Melt index testing: The melt index of the product is tested using a melt index instrument to ensure its melt flow performance.

During the production process, the following quality control measures can also be taken:

Production process monitoring: Regularly inspect and maintain blow molding equipment to ensure stable operation and avoid affecting product quality.

Raw material testing: Conduct strict testing on raw materials to ensure that they meet product requirements and avoid unstable product quality caused by material quality issues.

Establish quality control positions: Set up dedicated quality control positions on the production line to conduct regular inspections of products, promptly identify and resolve quality issues.

Establish a comprehensive record system: Record the production process, including equipment operation, raw material usage, product testing results, etc., to facilitate quality traceability and problem analysis.

Blow molding is a plastic product processing technology, which can be divided into various forms such as injection molding blow molding, extrusion blow molding, and pressure blow molding according to the different raw materials. Blow molded products mainly include various plastic bottles, plastic buckets, plastic tubes, plastic films, etc. Blow molding process is achieved by fully melting thermoplastic particles inside a mold under certain temperature conditions, extruding the melted plastic into shape through air pressure, and then cooling and shaping it.

The temperature, humidity, and cleanliness of the production environment can also have a certain impact on the quality of blow molded products. Excessively high or low temperatures can affect the melting state and cooling rate of plastics, leading to dimensional deviations and unstable performance of products; Excessive humidity may cause plastic raw materials to become damp, affecting the quality of the product; Dust and impurities in the production environment can easily adhere to the surface of the product, affecting its appearance quality. Therefore, it is necessary to maintain a relatively stable temperature and humidity in the production environment, strengthen the cleaning management of the production workshop, regularly clean and disinfect, and prevent dust and impurities from entering the production equipment and molds.