In the injection molding production, decided whether to use the hot runner system  in any situation to be more economical, usually needs considered from the technical factor and the economic agent two aspects.

1st, technical factor

From the technical angle judges whether to use the hot runner system, generally needs makes the decision together by the product development personnel and the mold manufacturer. In the judgment process, may invite the hot runner system supplier to participation discusses and provides the essential technical support. In ordinary circumstances, regarding certain large-scale, thin wall injection molding product or structure complex product, for example large-scale television's shell, automobile bumper, air conditioning face guard and so on, when uses the cold runner mold is unable to take shape or the formation very difficulty, the hot runner system usually is the first choice technological means; Some injection molding product, although uses the cold runner mold also to be able to take shape smoothly, but stems from to the product certain performance request, for example mechanical properties, superficial artistry, optics request, shape and structure stable and so on, often needs to use the hot runner system to improve the plastic the fluidity; Specially, if use pin valve type hot runner system, but may also through to the time active control, the change cementing mark distribution, even eliminates the cementing mark. 2nd, economic agent From the economical angle decided whether to use the hot runner system, usually is with the economical repayment which its brings carries on the hot runner system's purchasing expense the comparison. In the actual inspection, needs to carry on the computation contrast according to the product manufacturing special details. Aspect and so on additional profit which the supposition in one year complete production cycle, uses the hot runner system to bring the raw material saving of expense which, the energy conservation expense, the production efficiency enhancement as well as the mold scale expands produces sum totals to be bigger than purchases the hot runner system price 2 times, then the injection molding producer does not have the risk to the hot runner system's investment. In the choice and the use should pay attention question Chooses the hot runner system's key chooses the good supplier. Because the hot runner technology is a dynamic applied technology, it along with exploitation conditions' difference, has the very big variable. In the practical application, the system analysis and the application experience are frequently very important. Therefore, the supplier provides should not only be the hot runner product, more importantly, the supplier should also provide the system analysis and the thorough technical service, has contained the earlier period technical advisory work.

A qualified hot runner supplier, must have the basic condition is:

Has the specialized technical team and the service troop;

Has the legitimate general flow analysis software (for example the MoldFlow software). The hot runner supplier only then has the software supplier's technical support for a long time, can obtain the accurate analysis result. If uses pirates analyzes the software, gives the analysis report often in false, different with the general operating system software, those who analyze the software to provide is the engineering design basis and the security, but the general operating system software provides a working platform merely;

Has the precise numerical control processing equipment, makes the high accuracy the hot runner product;

Has many year rich application experiences;

Has the sufficient spare parts stock or spare parts manufacturing capacity.

Regarding the above basic condition, if lacks any link, has the possibility to cause the customer to the hot flow channel application defeat.

The injection molding producer when chooses the hot runner system, should pay attention to the following several points fully:

In the product development or the mold design stage, must express all specification fully as far as possible, and all engineering data will provide fully to the hot runner supplier, so that the supplier can obtain the enough design basis, achieves the best project objective; After the hot runner supplier provides the design paper, should unify own mold structure, scrutinizes carefully and confirmed. If acts according to the hot runner supplier's request, needs to carry on the processing to mold's certain spots, must carry on strictly according to the blueprint, otherwise, the small modification has the possibility to cause system's defeat .