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Why are an increasing number of plastic mold factory choose hot runner?
by：CSSSLD
2021-01-23
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:
a, what is the hot runner?
cold runner is refers to the plastic mold gate entrance and products between the
section. 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 plastic not frozen, so in the next - Injections of flow channel is still open. Briefly, hot runner is an extension of the injection molding machine nozzle.
2, the history and development of hot runner!
hot runner system ( 热runnersystems)
originated in hot 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. Mid of the last century or even earlier. Hot runner has many advantages, therefore, relatively fast development abroad, many plastic mold factory 50% of produced by using the hot runner technology, part of the mold factory and even reached 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 the overall. In 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.
3, using 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 meaning is particularly important for plastic expensive with 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 in the runner system to get accurate temperature control. Plastic can be more uniform state into the cavity, the result is a - quality To the 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 PE preform manufacturing and multicolor in mould injection, injection process, a variety of materials STACK MOLD
( Method of box mold) And so on. Although compared with the cold runner mold, hot runner mold has many remarkable advantages.
but 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.
a, what is the hot runner?
cold runner is refers to the plastic mold gate entrance and products between the
section. 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 plastic not frozen, so in the next - Injections of flow channel is still open. Briefly, hot runner is an extension of the injection molding machine nozzle.
2, the history and development of hot runner!
hot runner system ( 热runnersystems)
originated in hot 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. Mid of the last century or even earlier. Hot runner has many advantages, therefore, relatively fast development abroad, many plastic mold factory 50% of produced by using the hot runner technology, part of the mold factory and even reached 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 the overall. In 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.
3, using 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 meaning is particularly important for plastic expensive with 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 in the runner system to get accurate temperature control. Plastic can be more uniform state into the cavity, the result is a - quality To the 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 PE preform manufacturing and multicolor in mould injection, injection process, a variety of materials STACK MOLD
( Method of box mold) And so on. Although compared with the cold runner mold, hot runner mold has many remarkable advantages.
but 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.
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