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Sprue Bushing / Single Nozzle SB/USB5

Sprue Bushing / Single Nozzle SB/USB5
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Sprue Bushing / Single Nozzle SB/USB5

Product catalog summary
Overview: This technical guide covers Synventive USB5 and SB5 hot sprue bushings, which are designed for smaller injection molds and compatible with standard mold plate thicknesses. They serve as replacements for conventional cold sprue bushings in U.S. standard molds.
Specifications: The bushings can withstand a maximum pressure of 20,000 psi and a temperature of 650°F. They feature a mineral insulated heater band and a thermocouple hole, with heater specifications of 45mm I.D. x 35mm wide, 450 W, available in 120 or 240 V.
Ordering Information: When ordering, select the bushing based on mold depth, specify the tip style, and provide details such as orifice diameter and material specifications. USB5 and SB5 are not recommended for glass-filled materials; USB8 and SB8 are preferred.
Tip Styles: Various tip styles (CV-10, CV-11, CV-20, CV-21) are described, each with specific applications and characteristics, such as full-flow or cone tips, and their suitability for different materials.
Material Compatibility: A compatibility chart is provided, indicating suitable Synventive tip styles for various materials and any reservations.
Accessories: Synventive offers temperature control systems and replacement parts like band heaters and thermocouples, with specific part numbers for ordering.
Key Considerations: The guide emphasizes specifying correct dimensions and materials for optimal performance and compatibility, with guidelines for orifice diameter based on material type and part specifications.
Maintenance Procedures:
  • Tip Removal/Replacement: Use a split wrench and a 27mm 6-point deep socket wrench for tip removal. Heat the bushing to its operating melt temperature if the tip is difficult to remove.
  • Insert Removal: Drill into the center of the insert and thread using an M5 tap for removal.
  • Tip Replacement: Ensure all plastic is removed from the SYNVENTIVE-SEAL and sealing diameter. Verify seating with blueing and torque the tip to 6.9 kg.M (50 ft.lb).
  • Insert Replacement: Clean the insert counter bore and ensure the insert diameter is slightly larger than the counter bore for proper heat transfer.
  • SYNVENTIVE-SEAL Replacement: Inspect for damage and replace using a pressing tool, ensuring the sealing diameter is smooth and free of plastic.
  • Stripper Plate Installation: Instructions are provided for USB5, SB5, USB8, SB8, and SB13 bushings.
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Catalog excerpts

Sprue Bushing / Single Nozzle SB/USB5-1

Hot Sprue Bushings Products/Technical Guide >

 Open the catalog to page 1
Sprue Bushing / Single Nozzle SB/USB5-2

19mm Mold/Tip Diameter 5mm Flow Bore Diameter SB5 USB5 .750 Mold/Tip Diameter .197 Flow Bore Diameter 1.Cold bushing length must allow for thermal expan sion to fit specified mold length.2.For special "A" length,order next longer model and specify exact length required (e.g.,special "A" = 2.556; order model USB5-2020).3.For use with 3-plate molds,machine a stripper plate sleeve (see Technical Guide Section FӔ) in conjunction with a standard model bushing using CV-10 or CV-11 tip style.4.When tip extension is specified,mold length "A" does not change,but is provided atsame nominal length for the...

 Open the catalog to page 2
Sprue Bushing / Single Nozzle SB/USB5-7

USB5 Hot Sprue Bushing (inches) > Open Cone CV-21Gate Orifice0.9 2.2 (.035֔ .087֔) Open Cone CV-21Gate Orifice0.9 2.2 (.035֔.087֔) SB5 Hot Sprue Bushing (metric) > 7 of 21 size="-2">

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Sprue Bushing / Single Nozzle SB/USB5-10

Notes > USB5 Hot Sprue Bushing (inches) With CV-11 Tip Table 1&2 shows the recommended recess required to keep the vestige below the part surface.Consult Synventive when using glass fibers or other fillers. 10 of 21 size="-3">

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Sprue Bushing / Single Nozzle SB/USB5-11

SB5 Hot Sprue Bushing (metric) With CV-11 Tip Notes > Table 1&2 shows the recommended recess required to keep the vestige below the part surface.Consult Synventive when using glass fibers or other fillers. 11 of 21 size="-3">

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Sprue Bushing / Single Nozzle SB/USB5-15

SB5 Hot Sprue Bushing (metric) With CV-21 Tip Notes > Table 1&2 shows the recommended recess required to keep the vestige below the part surface.Consult Synventive when using glass fibers or other fillers. 15 of 21 size="-3">

 Open the catalog to page 15
Sprue Bushing / Single Nozzle SB/USB5-17

MATERIALSynventive Hot Sprue BushingsUSB5*,SB5*,USB8,SB8,SB13,SB15 & SB24** > GR-Glass ReinforcedNR-Not Recommended for Most ApplicationsRecommended Tip/Bushing1.Most Suitable 2.Suitable with some reservations: e.g.Gate Control,etc. (Not as good as category 1) See page 24 for correct Orifice Sizing*USB5 & SB5 Bushings are NR-For Glass Filled Materials.**SB24 Bushings are available with CV-10 & CV-20 tips only.***See Orifice Diameter Requirements,page 24. Synventive Tip Styles > CV-10CV-11CV-20CV-21 ABS1111 ABS GR ***1212 ACETAL (POM)NR1NR1 ACETAL GR1212 ACRYLIC1111 LCPNR1NR1 PPO1111 NYLON 6 ***NR1NR1...

 Open the catalog to page 17
Sprue Bushing / Single Nozzle SB/USB5-18

This is the most widely used tip. This tip style is used primarily to provide Vestige height is equal to orifice diameter. reduced vestige height,0.4- 0.9mm high Provides best gate control for for all materials. most materials. Cone Point adds heatto center of orifice for Open flowbore provides lowpressure drop. nylon,acetal and PBT. Tramp metal can usually flow through tip. Orifice adjustment requires added Orifice is increased by simple straight reaming of diameter. machining to hold land length at0.08/0.13mm. > Same as CV-10 except gate orifice is > Same as CV-11 except gate orifice is machined...

 Open the catalog to page 18
Sprue Bushing / Single Nozzle SB/USB5-19

Single Zone 15 Amp Temperature Controller includes one thermocouple connector (80-M2MJ)CatalogAmp/Voltage Input OutputNumberconnectorconnector Catalog No.*Catalog No.*80-PIM1A1515A/240V80-AC1524F 80-AC1524M (NEMA 6-15)(NEMA 6-15)80-PIM1A15115A/120V80-AC1512F 80-AC1512M(NEMA 5-15)(NEMA 5-15) > Synventive offers a complete line of single and multi-zone temperature control systems.For details,see Temperature Control SystemsDesign Manual. 19 of 21 size="-2">

 Open the catalog to page 19
Sprue Bushing / Single Nozzle SB/USB5-20

Tip Removal > 1.Slip each half of split wrench onto flats of tip.Slide 27mm 6 point deepsocket wrench over split wrench.Torque off tip with wrench assembly. See Figure 1.2.Tips are usually removed at room temperature.If tip does not break free,heat bushing to operating melt temperature. Insert Removal > 1.The conductive BeCu insert should only be removed if it is to be replacedby a new insert.Reinstallation of the same insert may affect the heat transfer from the steel bodyto the BeCu insert.2.Using a 4.3mm dia.drill,machine into the center of the insert for a depthof 10mm,and then thread using...

 Open the catalog to page 20
Sprue Bushing / Single Nozzle SB/USB5-21

For USB5 And SB5 Bushing For USB8 And SB8 Bushing For SB13 Bushing > 21 of 21 size="-1">

 Open the catalog to page 21

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*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.