Analysis of Common Problems and Countermeasures in Transparent Plastic Injection Molding

Transparent plastic injection molding faces many challenges in the production process due to its strict requirements for product transparency and surface quality. From raw materials to finished products, every step needs to be carefully controlled to ensure that the final product meets high standards. The following will elaborate on common issues related to transparent plastic injection molding from multiple key aspects.
Raw material control: Purity is the cornerstone of transparency
Transparent plastic parts require extremely high transparency, and any impurities may affect the transparency of the product. During storage, transportation, and feeding, it is necessary to ensure that the raw materials are clean and free from contamination. The moisture in the raw materials is a major hidden danger, as heating can cause them to deteriorate, so drying treatment is essential. When drying, the input air needs to be filtered and dehumidified to prevent secondary pollution of raw materials and lay the foundation for high-quality injection molding.
Equipment maintenance: equal emphasis on cleaning and temperature control
The cleaning of buckets, screws, and their accessories is crucial. To prevent contamination of raw materials or impurities in the grooves of screws and accessories, especially for resins with poor thermal stability, the screws should be cleaned before and after use to avoid residual impurities affecting subsequent production. When temporarily shutting down the equipment, in order to prevent the degradation of raw materials due to prolonged residence at high temperatures, the temperature of the dryer and bucket should be lowered in a timely manner to ensure stable operation of the equipment.
Mold and Product Design: Scientific Design Achieves High Quality Molding
Mold design and product design have a significant impact on the molding quality of transparent plastics. To prevent poor plastic molding, surface defects, and deterioration caused by poor flow or uneven cooling, the following points should be noted during design:
Wall thickness and demolding slope: The wall thickness should be as uniform as possible, and the demolding slope should be large enough to ensure smooth demolding of the product and avoid surface damage caused by difficult demolding.
Smooth transition: All parts of the product should have a smooth transition to prevent sharp corners, as sharp corners are prone to stress concentration and affect product quality.
Gate and runner design: The gate and runner should be as wide as possible, and the gate position should be reasonably determined according to the shrinkage and solidification process to ensure that the plastic can be filled smoothly and evenly.
Mold surface quality: The mold surface should be smooth and have low roughness, which can make the product surface smoother and brighter.
Exhaust groove setting: The exhaust groove must be large enough to fully exhaust the air and gas in the melt, avoiding defects such as bubbles inside the product.