Why are an increasing number of plastic mold factory choose hot runner?

Believe that a lot of friends are looking for plastic mold factory open mould will encounter such a situation, when some of the large amount of sol products, uneven wall thickness or thin walled, complex products, plastic mold factory project responsible personnel will be proposed to choose hot runner, the hot runner really is what things, what's the use of, why you so much? Small make up today to give everybody popularization of universal plastic mold factory is called a hot runner artifact. Mainly from three parts to tell: what is the hot runner. The history and development of hot runner; Cold and hot flow channel want to compare what are the advantages and disadvantages? Cold runner is refers to the plastic part between the mold and product gate entrance. Plastic by injection pressure in the flow passage and its heat flow state and flow channel as part of the molding material, but it does not belong to the product. So when we design the mold should not only consider filling effect, and to consider how to save material by shortening, narrow passage, ideally in this way, but in practical application, it is difficult to achieve the best of both worlds. Hot runner is also called the free port is to point to in every time after the injection port of the plastic is not frozen, plastic products mold release, he don't need to port the runner out. Due to the flow of the plastic without coagulation, so the next time the injection port is still open. Briefly, hot runner is an extension of the injection molding machine nozzle. Hot runner system ( 热runnersystems) Originated in no runner system in injection molding industry, as an advanced plastic injection molding processing technology, the widespread use of in the western developed countries can be traced back to the mid of the last century or even earlier. Hot runner has many advantages, therefore, relatively fast development abroad, many plastic mold factory is the production of more than 50% of the mould adopted hot runner technology, part of the mold factory and more than 80%. In China, this technology in nearly a decade to really be comprehensive promotion and application, with the continuous development of mould industry, used in the plastic mould of hot flow path proportion also gradually increase, but in general has not yet reached the proportion of foreign hot runner mold. In recent years, the hot runner technology in China gradually promotion, this is largely due to the mold to the U. S. and European companies brought by the rapid development of exports. In the European and American countries, has been dependent on the hot runner molding production technology. Don't use the mold hot runner technology is now difficult to export, this also caused a lot of mould manufacturer for hot runner technology shift in consciousness. The hot runner what are the advantages and disadvantages compared with the cold runner? 1, because there is no limit to the gating system, cooling time, stamping shape after curing can be out in a timely manner. Many small parts with hot runner mold production of thin-walled molding cycle can be under 5 seconds. 2 in the hot runner mold because there is no cold runner, so there is no material production costs. This was particularly significant for the application of plastic expensive project. Main hot runner manufacturers in the world, in fact, both oil and plastic raw materials is expensive in the world s got swift and violent development, because of the hot runner technology is an effective way to reduce waste to reduce raw material costs. 3 in the process of forming mould of hot flow path, the plastic melt temperature control in runner system accurately. Plastic can be more uniform state into the cavity, the result is consistent with the quality parts. Gate of hot runner molding parts are of good quality and low residual stress after demoulding, part deformation is small. So a lot of high quality products on the market are produced by hot runner mold. 4 parts after molding mould of hot flow path is the finished product, don't need to trim the gate and recovery processing cold runner process, for production automation. Many products manufacturers at home and abroad are combined hot runner and automation to greatly improve production efficiency. 5 many advanced plastic forming technology is developed based on hot runner technology. Such as PET preform manufacturing, multi-color injection, a variety of materials in mould injection process, the STACK MOLD ( Folding box mold) And so on. Although compared with the cold runner mold, hot runner mold has many remarkable advantages. But the plastic mold factory also need to know the disadvantages of the mould of hot flow path. In summary there are the following: hot runner components price is more expensive, hot runner mould cost could be greatly increased. If small parts production, mold tool cost ratio is high, no economic sense. Mould users for many developing countries, expensive is affect the hot runner mold hot runner system widely used one of the major problems. The second hot runner need precision processing machinery to guarantee machining plastic mold factory. With mold hot runner system integration and coordination with the extremely strict, or die in the process of production will appear a lot of serious problems. Compared with the cold runner mold, hot runner mold complex operation and maintenance. If use improper operation easy to damage the hot runner spare parts, make the production can't be, cause huge economic losses. Have no idea about hot runner plastic mold factory, need a long time to use experience. Small make up in the plastic mold industry for more than ten years, after the mould thousands, ha ha, if your product positioning high-end, demanding, suggest use hot runner oh,,, if your product quantity is big, selects the hot runner can improve production efficiency at the same time can also save a lot of cost.