In the injection moulding process, the selection and handling of raw material for injection moulding directly affect the product's quality. Properly choosing suitable raw material for injection moulding and conducting scientific handling can effectively avoid issues like flow marks, ensuring the stability of both the product's appearance and functionality.
Selecting high-quality raw material for injection moulding is crucial to avoid the formation of flow marks. Poor quality raw materials, such as those containing impurities, moisture, or uneven particle size distribution, can affect the flowability of the molten plastic, leading to flow marks during the moulding process. Therefore, ensuring the purity and uniformity of the raw material for injection moulding is vital.
Stable injection pressure is necessary during the injection process of the raw material for injection moulding. Pressure fluctuations can cause uneven flow of molten plastic, resulting in flow marks on the product's surface. Therefore, the injection moulding machine must precisely control the injection pressure to maintain a uniform and stable flow, ensuring optimal moulding results.
The design of the mould also significantly impacts the flowability of the raw material for injection moulding. If the mould's runner design is not well thought out, it can cause uneven flow of the molten plastic, leading to flow marks. A well-designed runner and venting system are essential for ensuring smooth flow of the raw material for injection moulding, which is a critical factor in preventing flow marks.
If the raw material for injection moulding absorbs moisture before use, it will severely affect the flowability of the molten plastic, possibly resulting in flow marks. Therefore, drying treatment of the raw material for injection moulding is crucial. Specialized drying equipment can be used to dry the material according to recommended temperature and time to ensure the moisture content remains within the appropriate range.
Choosing the right drying equipment, such as a hot air circulation oven or a dedicated raw material dryer for injection moulding, is the key to meeting drying requirements. The drying temperature is typically set between 70°C and 90°C, with drying times ranging from 2 to 4 hours. Regularly checking the moisture content of the raw material is important, ensuring it stays below 0.2%-0.5% for optimal drying.
The selection and handling of raw material for injection moulding directly influence the quality of the injection moulding process. Proper material selection, precise pressure control, and scientific drying treatment can effectively prevent issues like flow marks. If you face difficulties in selecting and handling raw materials in the injection moulding process, Keyplast offers extensive industry experience and is dedicated to providing the most suitable raw material for injection moulding to ensure your product quality and production efficiency.
