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Hot One Nozzles FAQ

I am interested in a DME Hot One nozzle assembly, but I want to process glass-filled thermoplastic. Can I do this?

It may be possible depending on the thermoplastic and application. If you are uncertain as to what is feasible and would like a recommendation, please contact your DME Customer Service Representative, who will put you in contact with a DME Technical Service Representative who will review your application requirements.

I am retrofitting a mold with a DME Hot One nozzle assembly that requires a different body length than what is offered as standard. Can I have a special nozzle body length made by DME?

It is recommended against using nozzle lengths that differ from standard offering as the SCH and CIH nozzle heaters have been developed over many years, and special orders could increase both product price and delivery time required. It is recommended to use the next longer length (if available) and use a spacer plate behind the A-plate to make up the required difference. Please note that if a special nozzle length is required, it may not be possible to order a special nozzle length depending on the requirement. In such cases, please contact your DME Customer Service Representative for assistance.

I have a DME Hot One nozzle assembly and I would like to reduce the amount of heat drawn at the tip by relieving or reducing the amount of land contact between the seal off diameter and the surrounding mold steel. Where can I find instructions?

Please contact your DME Customer Service Representative, who will put you in contact with a DME Technical Service Representative to review your application with you. Because the amount that may be relieved from the seal-off diameter of a DME Hot One ring gate retainer or sprue gate tip depends on the intended application, no standard instructions are posted at this time. Do not modify or relieve the seal off diameter of a DME Hot One point gate retainer.

I would like a CIH heater for the 625 series nozzle. Is this available?

Yes it is, please see the Hot Runner & Control Systems catalog

I would like a Hot One nozzle with a spherical radius, to be used as a sprue bushing in a single drop mold. Is this design available?

Such configurations are available in the D-Max Hot Sprue Bushing product family, which are very similar to Hot One nozzles. The DME Webpage for D-Max Hot Sprue Bushings can be found here. If you require a nozzle configuration that is different than what is offered in the D-Max Hot Sprue Bushing product family, please contact your DME Customer Service Representative.

I would like some information on servicing or installing my Hot One nozzle assembly. Where can I find that information?

The necessary information is located in the “Resources” section of the DME Website, under “Packing Slips”, and can be found here. If you have a question that is not covered by the product packing slip/installation instruction, please contact your DME Customer Service Representative for assistance.

I would like to gate into a dimple. Can I modify a standard 250, 375 or 625 series gate detail?

It may be possible depending on intended application. Please contact your DME Customer Service Representative for assistance.

What is the processing temperature upper limit that I can use with my DME Hot One nozzle assembly?

It depends on the application, as well as nozzle heater and the tip or tip assembly used.

For DME 250 or 375 series Hot One applications that require greater than 575°F (302°C) processing temperature, it is recommended to use a CIH heater assembly. CIH heaters are not available for the 625 series Hot One nozzle assemblies at this time. Some customers have success using DME 250 , 375 or 625 series Hot One assemblies with SCH heaters when processing thermoplastics that require greater than 575°F (302°C) processing temperature, however that success is largely based on the molding application. If you are unfamiliar with using Hot One nozzles with SCH heaters in applications requiring greater than 575°F (302°C) melt processing temperature and you would like a recommendation, please contact your DME Customer Service Representative and you will be put in contact with a DME Technical Service Representative to review your application.

The DME Hot One point-gate tip assemblies are available with standard needles as well as wear-resistant needles. For DME Hot One nozzle assemblies with Ring Gate Retainers, some customers prefer to use the Ring Gate needle type (see DME Hot Runner Catalog for details) however it is recommended to use a Point Gate Needle with a Ring Gate Retainer. If using a DME Ring Gate needle, it is not recommended to use the Ring Gate needle in applications that require greater than 480°F (249°C) melt processing temperature, and even at lower processing temperatures a Point Gate needle may be required to process the intended grade of resin.

Standard Hot One needles are not recommended to be used with any filled thermoplastic, and are not recommended to be used in applications that require greater than 480°F (249°C) melt processing temperature. Depending on the application, wear-resistant Hot One needles may be used with filled thermoplastics (not recommended for thermoplastics that have greater than 30% filler including glass, mineral, talc, other), and are not recommended to be used in applications requiring greater than 635°F (335°C) melt processing temperature.

DME Hot One sprue tips can be used with filled thermoplastics (not recommended for thermoplastics that have greater than 30% filler including glass, mineral, talc, other) and are not recommended to be used in applications requiring greater than 635°F (335°C) melt processing temperature. If you have an application that requires greater than 635°F (335°C) melt processing temperature, if the intended thermoplastic has greater than 30% filler, or if you would like a recommendation for the parts best suited for your intended application, please contact your DME Customer Service Representative, and you will be put in contact with a DME Technical Service Representative to review your application requirements.

What is the upper limit injection pressure that I can use with my DME Hot One nozzle assembly?

The DME Hot One nozzle assembly is not to be used in applications that exceed 20,000 PSI injection pressure. However please note that if you are approaching 20,000 PSI injection pressure, the injection processing window for a typical injection molding machine will most likely become significantly reduced, which may affect your ability to mold good parts. In such cases it is recommended to refer to your injection molding machine specifications or to speak to a technical representative for the manufacture of your injection molding machine.

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