Application Occasions for Hot Runner System

Nowadays, the whole industry is under development with variety kinds of products whose updating is fast among harsh competition. In this condition, products of hot runner system cater to customers’ demand for short lead time, high accuracy and low cost, with the development tendency below:

Mould becoming large-scale

There are two factors leading to the tendency: one is that components made into moulds are becoming increasingly larger; another is the booming of one mould for multiple cavities. (Some could reach one mould for hundreds of cavities)

Mould accuracy becoming higher

Moulds and Accessories

Ten years ago, accuracy of precision moulds generally reaches to 5μm while currently it has reached to the level 2μm~3μm. The mould accuracy of 1μM will be launched soon after. Concerning the miniaturization of components and requirement of accuracy, some of mould accuracy needs to be within 1μM, which hastens superfinish crafts.

Further development for multifunctional compound moulds

Compound moulds are developed on the basis of multi-station progressive die. Apart from drawing components, a set of multi-station moulds also has assembly tasks such as laminating, tapping, riveting and locking. Products of this kind of moulds are not single but bathed including elements of contact and support, iron cores of instruments and electrical appliances.

Thanks to the promotion of application, the proportion of hot runner system in plastic moulds will be advanced

Adopting technologies of hot runner system could not only boost production rate and quality but save a lot of raw material. This is the reason why hot runner system enjoys a widespread development overseas. In some manufacturing plants, utilization rate of hot runner system technology has rose up to 50% and even 80%, which proves that the effects are obvious and favorable.

Moulds of Hot Runner System

As plastic molding crafts improve, gas-aided moulds and high pressure injection molding would develop accordingly

Precisions of plastics parts include dimensional precision, geometrical precision and appearance precision (Gloss and tone). To meet the requirement of precision, moulds manufactures would continue to develop high pressure injection molding and injection compressed molding. Molding contract is considered the key factor affecting precision but high pressure injection molding can reduce the contractility rate of resin and enhance dimensional stability. Gas-aided injection molding technology has become mature for the reason that it is able to improve both internal and external quality with advantages of low injection pressure, little deformation, easy to shape up products which have the diversity of wall thickness. Besides, the technology is also capable of saving material and advancing production efficiency.

Application of mould standardized parts becomes extensive

This kind of application would influence manufacturing cycle of moulds tremendously. Not only can standardized parts shorten production cycle but they improve moulds quality and reduce factory cost. Therefore, the popularity of standardized parts would become widespread in future.

1 Main Sprue with 48 Nozzles Tube Moulds

Prospect of fast economical moulds appeared to be bright

Today is the age of small-lot production with multi-species, which accounts for over 75% of industry in 21st century. The short service life and changing patterns of products require a much shorter moulds production cycle. Thus developing fast economical moulds is being hot-topic among customers. For example, these kinds of moulds will be used to develop super-plastic materials to make moulds or employing intensifiers like epoxy, polyester, added metal and glass to produce simple moulds whose features include simple crafts, easiness to control precision, small contractibility and low price.

Proportion of die cast moulds will be enhanced as products such as vehicles and motors become light-weight. Also there is increasingly high demand for the service life and complexity of die cast moulds

With the increasing proportion of plastic moulds, substitution of plastic for steels and woods gets a further development. Meanwhile, as the complexity and precision for machinery parts become higher, the demand for plastic moulds with good quality is under soaring.

Die and mould technology become increasingly advancing and the proportion of middle or high class moulds constantly rises, both of trends are virtually affected by product structural adjustment.