In most cases, material leakage in the hot runner system is not caused by poor design, but rather by failure to operate according to design parameters. Usually, leakage occurs at the sealing point between the hot nozzle and the splitter plate. According to the design specifications of general hot runner, there is a steel edge at the hot nozzle, which ensures that the height of the hot nozzle component is less than the actual groove depth on the hot runner plate. The reason why
The injection pressure loss in the hot runner system cannot be ignored. Many hot runner mold customers have a misconception that the plastic solution located in the hot runner is always hot, so the injection pressure loss of the hot runner is much smaller than that of the cold runner. In fact, in order to meet the needs of hot runner structure design, the flow distance of the solution in the hot runner system will greatly increase. Therefore, in the hot runner system
Although hot runner molds have many significant advantages compared to cold runner molds, mold users also need to understand the drawbacks of hot runner molds. In summary, there are several points: the cost of molds increases, and hot runner components are relatively expensive. The cost of hot runner molds may increase significantly. If the production of parts is small, the cost of mold tools is high, which is not cost-effective for many developing countries
I believe everyone will encounter the problem of overheating and color change in the flow channel. After producing one color, when producing another color, it is necessary to replace the remaining color to ensure normal production. The simple method is to directly shape and replace the hot runner, but this method will waste a large amount of raw materials, which can be achieved by airing the runner until the hot runner is replaced completely. Regardless of these two sides
A successful hot runner application project requires multiple links to be guaranteed. The two most important technical factors are: first, the control of plastic temperature; The second is the control of plastic flow. 1. The control of plastic temperature is extremely important in hot runner applications. Many processing and product quality issues arise during the production process. The problem directly originates from
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Haochen Hot Runner tells you that hot runner molds can be divided into open hot runner molds and needle valve hot runner molds. Due to the fact that the open hot runner breaks through the condensation gate when injecting glue with the screw of the injection machine forward, it can only be injected into the mold. Conversely, when the screw in the injection machine retreats, it can only be condensed with the gate to close the glue outlet. So usually the choice of gate size is quite important, otherwise due to the gate area
Haochen Hot Runner tells you that hot runner molds have been successfully used to process various thermoplastic materials. Such as PP, PE, PS, ABS, SAN, AS, BS, PBT, PA, PSU, PC, PCTG, POM, LCP, PVC, PET, PMMA, PEI, PEEK, ABS/PC, etc. Almost any plastic material that can be used for injection molding can be processed using a hot runner mold. Haochen Hot Runner Technology Co., Ltd. can meet customers' diversified injection molding needs with mature hot runner technology, such as high requirements for V0 grade ABS, PC, and other milky white anti rust products
Check whether there are leaks or blockages in the pipelines and pumps, check the fit between the cylinder and piston, check whether the feed pipeline is excessively bent, and whether the piston and valve needle are flexible. Adjust the concentricity of the cylinder body, splitter plate, and hot nozzle to increase the positioning device. Add cooling around the cylinder block.
Haochen Hot Runner tells you: Firstly, check the fitting diameter and depth dimensions of the valve needle sleeve and the hot splitter plate hole. If there is a problem, it needs to be reworked or replaced. 2、 Check the fitting size of the valve needle diameter and the inner hole of the valve needle sleeve. If there is a problem, it needs to be reworked or replaced.
Haochen Hot Runner tells you that when the valve needle cannot be pushed to the bottom, there may be a material head on the surface of the product due to one reason. When the injection temperature of the product is reached, the length of the valve needle after thermal expansion cannot reach the surface of the mold cavity. 2、 Is the front end of the valve needle smaller than the size of the mold gate. 3、 The concentricity and roundness of the valve needle and valve needle sleeve are insufficient