New DME D-Max Hot Sprue Bushings Are Ideal for Prototyping and Short Runs
Standardized single-drop bushings incorporate cast-in heater for more uniform heat profile
MADISON HEIGHTS, Mich. – DME, a leading manufacturer of mold technologies, has introduced a new D-Max line of single hot sprue bushings. The bushings incorporate DME's standard slip-on, cast-in heaters on the nozzle body, which provides a more uniform heat profile than traditional square coil heaters.
The new D-Max line, is ideal for prototyping and short-run production. The standardized bushings enable moldmakers to exactly simulate multi-drop systems using the same basic components – but without requiring special heaters, tips, retainers or needles.
"Slip-on, cast-in heaters give molders better control of the heat in the nozzle body so they can reduce stringing," said Craig Kovacic, Hot Runner Manager at DME. "They also last about 50% longer than square coils when used in the nozzle body."
The D-Max bushings have two zones of heat: a slip-on, cast-in heater on the nozzle body and a square coil heater on the head area of the nozzle. The square coil heater uses a separate thermocouple and gives the user an accurate temperature reading to eliminate the heat soak time normally needed.
Moldmakers can either control the heaters separately or run them together as one zone. The design of the heating mechanisms enables the bushing to handle a wider range of materials, including a broader range of crystalline polymers.
"When protyping, it's very important to use the same nozzle that you'll be putting in a multi-drop system," said Kovacic. "D-Max replicates the same type of heater and tip so that everything reacts exactly the same in your multi-drop system as it did in single-drop."
Hot sprue bushings have distinct advantages over cold sprues. Because of the length of setup time, cold sprues can have very high cycle times, based on the diameter of the sprue. Hot sprues enable the mold to open as soon as the part sets up and, as a result, produce much shorter cycle times. Since hot sprues have no cold runner, they also produce much less material waste.
D-Max bushings are available in three sizes, which are convertible for metric applications if necessary.
- 250 Series (0.250 inch flow channel diameter)
- 375 Series (0.375 inch flow channel diameter)
- 625 Series (0.625 inch flow channel diameter)
Customers can visit DME's online catalog and order components here.
DME Company is an essential mold technologies resource to customers worldwide. Through aggressive new product development, global product standardization and a powerful combination of in-house manufacturing centers of excellence and strategic global partnerships, DME is helping customers succeed in changing times. The company’s standard-setting, comprehensive product line — including hot runner systems; control systems; mold bases and components; mold making and molding supplies; and cold runner systems for elastomers — is backed by expert technical service every step of the way. DME also manufactures and sells standard tooling for the die-casting industry. Visit www.dme.net for more information.