Cold runner systems: ColdFlow
We conﬁgure cold runner systems for processing the inorganic, two-component elastomer material LSR (liquid silicone rubber) with the same passion we have for designing and manufacturing hot runner systems. Simple construction, modular nozzle design, and excellent thermal separation between the nozzle and cavity are the key features of our exceptional cold runner system solutions that we continue to reﬁne with you in mind.
Your benefits at a glance
- Good thermal separation of the cold runner nozzles to the hot cavity plate
- Moveable fixation of needle guiding elements
- Universal applicability of all nozzles individually or in collection housing
- Variable needle stroke to compensate for filling differences
- Split manifold with runner design that is gentle with the melt
- Easy assembly and disassembly
- Easy maintenance and cleaning
- Convenient replacement of wear parts
Complete cold half as a standard part
GÜNTHER offer a complete cold half which can be purchased as a standard part and efficiently integrated into corresponding moulds.
The contact surfaces on the nozzle piece of the nozzles are kept as small as possible between the hot cavity plate and the cold half for thermal separation. Floating suspension helps to compensate for heat expansion. The flow volume of the cooling medium provides an optimum temperature profile.
Cold runner valve gate nozzles – individually or in a common housing
GÜNTHER's product range features two valve gate nozzles for cold runner systems. These nozzles can be used either individually or in a common housing for tighter cavity spacing with a common inlet and outlet.
Cold runner manifolds
For this purpose, GÜNTHER offer two types of cold runner manifold: a split version with two manifold plate halves and one with manifold plates equipped with closing plugs.
The NKW valve gate cold runner nozzle is used with a manifold. The nozzles can be individually tempered. Plug-in couplings enable easy mounting and dismounting of the cooling hoses. The modular system conﬁguration ensures quick and easy cleaning.
The valve gate cold runner nozzle type NMW is also used with a manifold. Up to four nozzles can be controlled in one cooling circuit and placed close together.