Nowadays, hot runner moulds are widely used. Not only can they save raw materials, but also reduce the discharge of waste products and improve the production of product quality. The use characteristics of hot runner moulds are described in detail below.
1. Shorten the moulding cycle
Because there is no limit to the cooling time of the sprue system, the parts can be ejected in time after being formed and solidified. Many thin-walled parts produced with hot runner moulds can be moulded in less than 5 seconds.
2. Save plastic raw materials
There is no cold runner in the pure hot runner mould, so there is no production cost. This is particularly significant for applications where plastics are expensive. In fact, all the major hot runner manufacturers in the world have developed rapidly in the era when oil and plastic raw materials are expensive in the world. Because hot runner technology is an effective way to reduce cost and material cost.
3. Reduce waste products and improve product quality
During the hot runner mould forming process, the temperature of the plastic melt is accurately controlled in the runner system. Plastic can flow into each cavity more uniformly, and the result is parts of consistent quality. The quality of the gate formed by the hot runner is good, the residual stress after demoulding is low, and the deformation of the part is small. Therefore, many high-quality products on the market are produced by hot runner moulds. For example, many plastic parts in MOTOROLA mobile phones, HP printers, and DELL laptops are made with hot runner moulds.
4. Eliminate subsequent processes, which is conducive to production automation
The product is finished after being formed by the hot runner mould, without the need to trim the gate and recycle the cold runner. Conducive to production automation. Many foreign product manufacturers have combined the hot runner and automation to greatly improve production efficiency.
5. Expand the application of injection moulding process
Many advanced plastic moulding processes are developed on the basis of hot runner technology. Such as PET preform production, multi-color co-injection in the mould, co-injection process of multiple materials, etc.