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Straight Shots FAQ

Does DME sell band heaters for the DME Straight Shot or High Performance Straight Shot?

DME does not sell any band heaters for the Straight Shot or High Performance Straight Shot.

I am retrofitting a mold with a Straight Shot bushing assembly, and I need a different body length than what is offered as standard. Can I have a special bushing length made by DME?

It is recommended against using bushing lengths that differ from standard offering as the nozzle and/or bushing 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 plan to use a T-Series Straight Shot Hot Sprue bushing. Is it possible to have the bushing flush with the back of the mold such that it does not stick out of the back of the mold?

Yes, it is possible, but you will need to modify the bushing. You would modify the parting-line side face of the larger outer diameter of the bushing, and machine back to ensure the back of the bushing body does not protrude past the locating ring. Please note that you cannot machine the front tip-end face of the bushing back, meaning that you will have a thicker stripper plate.

Optionally you can use an ER-Series (Short Style) Straight Shot Bushing, machine back the parting line face of the larger outer diameter of the bushing as described above, and you will need to add the taper to the front of the bushing body to match with the internal taper of the replacement stripper bushing.

Please note:1. Customers are required to machine the taper onto a T-series or TR-Series Straight Shot Hot Sprue Bushing body, in order to match with the internal taper of the replacement stripper bushing. The taper at the tip end of the T-Series Straight Shot Hot Sprue bushing is not delivered in a pre-machined format.

2. The S-Series, E-Series (long style), ER-Series (long style), T-Series and TR-Series Straight Shot Hot Sprue Bushings have a 0.31 inch diameter flow channel. The E-Series (short style) and the ER-Series (short style) Straight Shot Hot Sprue Bushings have a 0.25 inch diameter flow channel. Care must be taken when using a short-style E or ER-Series Straight Shot Hot Sprue bushing to replace a T or TR-Series Straight Shot Hot Sprue bushing, as the flow channel sizes are different.

I would like some information on servicing or installing my Straight Shot or High Performance Straight Shot Hot Sprue Bushing 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.

I would like to gate into a dimple. Can this be done?

It may be possible depending on intended application. Please contact your DME Customer Service Representative for assistance. Examples of permissible modifications are given in the DME Catalog.

I would like to mold parts out of glass-filled PB T using a High Performance Straight Shot. Is this ok?

Some customers have had success processing both filled and/or engineered grade thermoplastics using the High Performance Straight Shot Hot Sprue Bushigs. The success is largely based on the application. When intending to process engineered or filled thermoplastics through a DME single-drop bushing, it is recommended to use a heated-head D-Max Hot Sprue Bushing. Please contact your DME Customer Service Representative, and you will be put in touch with a Technical Service Representative who can help you select an appropriate product for your application.

In the DME Hot Runner Catalog, I see a “typical application” drawing of a T-Series Straight Shot bushing, and there appears to be a key that holds the bushing in place. Is this key required, and where can I find details on it?

We do recommend that you “key” the bushing in place, however the size and shape of the key depends on your preferred mold design. The key slot would be added to the body core in the same manner as shown in the DME Catalog, and this key slot cannot be more than ¼ inches (6.35 mm) into the bushing body. It is recommended that the key be at least 1/8 of an inch thick, and be made from hardened tool steel.

What angle does the heater rigid cable exit the back of the High Performance Straight Shot Hot Sprue Bushing assemblies?

The High Performance Straight Shot Hot Sprue Bushing assembly heater has a rigid cable exit that is oriented 5 degrees off the centerline or center axis of the bushing assembly. The other Straight Shot Hot Sprue Bushing assemblies have an option of either 5 degrees as described, or 90 degrees off of the center axis. An example is shown in the DME Hot Runner Catalog for the regular Straight Shot Hot Sprue Bushing assemblies.

Please note: do not attempt to bend the rigid cable exit on either the Straight Shot or High Performance Straight Shot heaters.

What kind of Straight Shot Hot Sprue Bushing is recommended for processing engineered grade materials?

Standard Straight Shots are to be used for commodity resin applications only. Only the High Performance Straight Shot Hot Sprue Bushing may be used with select engineered resin applications. If you are uncertain, please call us and ask to speak to a DME Hot Runner Technical Service Representative for recommendations as to what DME Hot Runner product is most appropriate for your intended molding application.

What material type is used for the High Performance Straight Shot Hot Sprue Bushing tips?

A wear-resistant material is used because of the higher processing temperatures and filled materials that may be used with the High Performance Straight Shot Hot Sprue Bushing.>

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