What type of injection system is used in the injection mold of electrical accessories C?

The injection system of the injection mold of electrical accessories C adopts a cold runner design, which is a type of runner widely used in the injection molding process to optimize material use, mold design and production efficiency. Cold runner refers to the process in which the temperature of the plastic melt is not maintained at a high enough level to prevent premature solidification when it flows through the runner part of the mold during the injection molding process. These runners are usually designed as a shorter path to reduce heat loss and are separated from the product immediately after the plastic part is molded, becoming waste or recycling. This design avoids the need for continuous heating in the hot runner, thereby simplifying the mold structure and control system.
Technical Features and Advantages
Cost-effectiveness: Cold runner molds have a relatively simple structure and do not require complex heating and temperature control systems, so the manufacturing cost is low. In addition, since the plastic in the runner can be recycled and reused, the material cost is further reduced.
Wide application: The cold runner system is suitable for a variety of plastic materials and mold designs of different complexities, especially for small batch or medium-scale production, and application scenarios that require rapid mold change.
Easy maintenance: Since there are no complex heating elements and temperature control circuits, routine maintenance and troubleshooting of cold runner molds are relatively easy.
Product quality: Although cold runners may produce a certain amount of pressure loss due to the cooling of plastic in the runner, good product quality and dimensional accuracy can still be guaranteed through reasonable runner design and injection molding parameter adjustment.
Compared with hot runners, the main difference of cold runners is the state treatment of plastic in the runner. Hot runners keep the plastic in the runner molten by continuous heating, achieving waste-free production, improving material utilization and production efficiency, and are particularly suitable for mass production. However, the initial investment of hot runners is high and requires more complex maintenance and technical support. In contrast, cold runners are more suitable for situations with limited budgets, small production batches or frequent product changes.
For plastic products such as electrical accessories C that have high requirements for dimensional accuracy, appearance quality and material properties, optimize the runner length and cross-sectional shape, reduce pressure loss and heat dissipation, and ensure that the plastic melt can fill the cavity evenly and quickly. Choose the appropriate gate position and size to balance the filling speed, pressure distribution and product appearance, while facilitating subsequent separation and waste recycling. Although the cold runner itself is not heated, the temperature control of the entire mold still needs to be precise to ensure the correct solidification of the plastic melt in the cavity and avoid deformation or internal stress. Considering the safety and durability requirements that may be involved in electrical accessories C, PE materials that meet relevant standards and have good processing performance should be selected.