MOLD COMPONENTS – INCH Copper-Based Alloy Sprue Bushings
MOLD COMPONENTS – INCH Copper-Based Alloy Sprue Bushings
High-conductivity, corrosion-resistant, copper-based alloy bushing body with hardened 420 stainless steel nozzle seat insert
Consistently recommended by a wide range of resin manufacturers, molders, moldmakers, designers and engineers, Many users are so pleased with the overall performance of this product that Copper-Based Alloy Sprue Bushings are now specified in all of the molds they build. Here are several benefits users rave about: • Reduced sprue cooling and overall cycle time Mold cycles are often limited or controlled by the length of time needed for solidification of the plastic sprue since it must be cool enough not to break or tear as the mold opens. This cycle limiting condition changes by using this b ushing – without any other changes to the mold. • Helps prevent sprue sticking, break-off and corrosion With conventional steel sprue bushings, many plastic resins, additives, colorants and combinations lead to corrosion and sticking problems. The inherent corrosion resistance and release properties of the copper alloy used in the s prue b ushing results in a significant increase in performance and product life compared to conventional steel sprue bushings. • Yields more rigid sprues with reduced sprue cool time for robotic removal of parts The sprue is often used as the grab point in robotic removal of parts, sprues and runners. This requires that the sprue be rigid enough to resist the pressure of the robot fingers as well as the extraction forces. With conventional steel sprue bushings , this
“ PSB” Series with a 1.000" Diameter Stem (Interchangeable with DME “B” Series Sprue Bushings) • Reduces sprue cooling time and cycle time • Helps prevent sprue sticking or break-off within bushing • Stainless steel nozzle seat provides wear resistance and insulates to reduce transference of heat from machine nozzle to the sprue area • PSB Series is directly interchangeable with existing DME “B” Series steel sprue bushings
• PSU Series is directly interchangeable with existing DME “U” Series steel sprue bushings • Reduces the need for water lines in the sprue area • Reduces scrap caused by contact between hot sprue and finished parts on conveyor belt or drop chute area • Provides a more rigid sprue for robotic part removal
Property Comparisons: Copper Alloy -vs- Steel Sprue Bushings Materials
“ PSU” Series with a .750" Diameter Stem (Interchangeable with DME “U” Series Sprue Bushings)
THERMAL CONDUCTIVITY AT 68°F BTU/(FT_HR_°F)
THERMAL DIFFUSIVITY AT 68°F FT 2 /HR
STAINLESS STEEL NOZZLE SEAT INSERT
STAINLESS STEEL NOZZLE SEAT INSERT
MATERIAL
L
L
COPPER ALLOY P20 TOOL STEEL H13 TOOL STEEL
150
2.32 0.39 0.31
7/32 R
O
20 17
1/8
O
Ø .750
Ø 1.000
Ø 2"
Ø 2"
R
R
1/2 TAPER PER FOOT (INCLUDED ANGLE)
1/2 TAPER PER FOOT (INCLUDED ANGLE)
3/16
3/16
7/8
A
7/8
A
ITEM NUMBER PSB0251 PSB0253 PSB0271 PSB0273 PSB0291 PSB0293 PSB0451 PSB0453 PSB0471 PSB0473 PSB0491 PSB0493 PSB0651 PSB0653 PSB0671 PSB0673 PSB0691 PSB0693 PSB0851 PSB0853 PSB0871 PSB0873 PSB0891 PSB0893
ITEM NUMBER PSU0251 PSU0253 PSU0271 PSU0273 PSU0291 PSU0293 PSU0451 PSU0453 PSU0471 PSU0473 PSU0491 PSU0493 PSU0651 PSU0653 PSU0671 PSU0673 PSU0691 PSU0693 PSU0851 PSU0853 PSU0871 PSU0873 PSU0891 PSU0893
A
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R
1 29 ⁄ 1 29 ⁄ 1 29 ⁄ 1 29 ⁄ 1 29 ⁄ 1 29 ⁄ 2 29 ⁄ 2 29 ⁄ 2 29 ⁄ 2 29 ⁄ 2 29 ⁄ 2 29 ⁄ 3 29 ⁄ 3 29 ⁄ 3 29 ⁄ 3 29 ⁄ 3 29 ⁄ 3 29 ⁄ 4 29 ⁄ 4 29 ⁄ 4 29 ⁄ 4 29 ⁄ 4 29 ⁄ 4 29 ⁄
2 2 2 2 2 2 3 3 3 3 3 3 4 4 4 4 4 4 5 5 5 5 5 5
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5 ⁄ 5 ⁄ 7 ⁄ 7 ⁄ 9 ⁄ 9 ⁄ 5 ⁄ 5 ⁄ 7 ⁄ 7 ⁄ 9 ⁄ 9 ⁄ 5 ⁄ 5 ⁄ 7 ⁄ 7 ⁄ 9 ⁄ 9 ⁄ 5 ⁄ 5 ⁄ 7 ⁄ 7 ⁄ 9 ⁄ 9 ⁄
1 ⁄ 3 ⁄ 1 ⁄ 3 ⁄ 1 ⁄ 3 ⁄ 1 ⁄ 3 ⁄ 1 ⁄ 3 ⁄ 1 ⁄ 3 ⁄ 1 ⁄ 3 ⁄ 1 ⁄ 3 ⁄ 1 ⁄ 3 ⁄ 1 ⁄ 3 ⁄ 1 ⁄ 3 ⁄ 1 ⁄ 3 ⁄
1 29 ⁄ 1 29 ⁄ 1 29 ⁄ 1 29 ⁄ 1 29 ⁄ 1 29 ⁄ 2 29 ⁄ 2 29 ⁄ 2 29 ⁄ 2 29 ⁄ 2 29 ⁄ 2 29 ⁄ 3 29 ⁄ 3 29 ⁄ 3 29 ⁄ 3 29 ⁄ 3 29 ⁄ 3 29 ⁄ 4 29 ⁄ 4 29 ⁄ 4 29 ⁄ 4 29 ⁄ 4 29 ⁄ 4 29 ⁄
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5 ⁄ 5 ⁄ 7 ⁄ 7 ⁄ 9 ⁄ 9 ⁄ 5 ⁄ 5 ⁄ 7 ⁄ 7 ⁄ 9 ⁄ 9 ⁄ 5 ⁄ 5 ⁄ 7 ⁄ 7 ⁄ 9 ⁄ 9 ⁄ 5 ⁄ 5 ⁄ 7 ⁄ 7 ⁄ 9 ⁄ 9 ⁄
1 ⁄ 3 ⁄ 1 ⁄ 3 ⁄ 1 ⁄ 3 ⁄ 1 ⁄ 3 ⁄ 1 ⁄ 3 ⁄ 1 ⁄ 3 ⁄ 1 ⁄ 3 ⁄ 1 ⁄ 3 ⁄ 1 ⁄ 3 ⁄ 1 ⁄ 3 ⁄ 1 ⁄ 3 ⁄ 1 ⁄ 3 ⁄
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often means added cooling time to the mold cycle. The high thermal conductivity of a copper-based alloy reduc es sprue cool time, again without any other changes to the mold.
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• Molding problems caused by sprues are eliminated
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A m olders choice for a variety of mold and resin applications say that they are able to control many sprue-related problems. As one molder who uses the product said,“I no longer struggle with sprue problems.” These Sprue Bushings are available in a number of popular standard sizes (see table on facing page), and as non-standards with quick delivery. Contact DME with your next application to reduce sprue cooling and cycle time.
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when ordering, please specify: 1. Quantity
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2. Item Number (which indicates “0” and “R” dimensions) 3. Method of shipment
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Note: All dimensions are specified in inches.
Note: All dimensions are specified in inches.
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279
U.S. 800-626-6653 ■ Canada 800-387-6600 ■ www.dme.net ■ store.dme.net
U.S. 800-626-6653 ■ Canada 800-387-6600 ■ www.dme.net ■ store.dme.net
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