DESMA emphasizes with the just delivered, first 32-nozzle FlowControl cold runner its mould-making competence. Due to now possible material savings in article production, the investment into this system will be paid off for the customer within a short time.
Material savings and the involved reduction of production costs are still the decisive topic in the rubber industry. With the just delivered 32-nozzle FlowControl cold runner system and the appropriate mould from the DESMA mould shop, a runner-less and rework-free article production is realized. Runners that do not exist do not need to be demoulded or separated either. Thus, apart from the material savings, the cycle time can be distinctly reduced. Moreover, the complete runner distributing deck was in this case superfluous what resulted in further cost savings.
Depending on the material costs and the article, the redemption period of the cold runner system should range between one and two years.
The patented FlowControl nozzle technology allows for a precise adjustment with repeated accuracy for each nozzle through the control system of the injection moulding machine.
This adjustability is the prerequisite for a rework-free article production. The FlowControl nozzle technology excels at small pressure drops, because no shut-off needle in the flow channel leads to annular cracking.
This nozzle structure enables a simple cleaning in case of material change or process malfunctions. Since each nozzle is fitted with a hydraulic cylinder to be actuated separately, a selective purging of individual nozzles in case of longer disruption of production is possible. This can be easily realized via the machine control.
The above schema depicts the advantages clearly. Whereas the conventional needle-shaped shut-off cold runners force annular cracking in the distributing channel, the FlowControl nozzle system allows for the material to flow virtually without any resistance almost up to the nozzle tip. This decisively reduces the pressure drop and enables a material change without any dismantling. If using a FlowControl cold runner system, the material change can normally be carried out by means of curing completely and subsequent purging.
Another important benefit is given by the perfect carrying-off of heat. While in the standard needle-shaped shut-off cold runner, all the heat taken up is carried off into the material channel through the adjacent needle in the mould, the FlowControl nozzle technology ensures the immediate carrying-off into the nozzle support area. Even longer disruptions of production of up to 30 minutes can therefore be cushioned without curing into the nozzle. If slight scorches actually occur in case of even much longer disruptions, they can be easily removed by means of selective purging of the individual nozzles (via machine control).
More than 140 delivered FlowControl cold runner systems reinforce the described advantages.
The DESMA process engineering center, where several FlowControl cold runner systems are installed for customer trials and material tests, is open to the specialized visitor.
Further information on our website: regarding functionality as well as animations
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