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Metallic mold materials.


Alpase M-1 aluminum mold plate in thicknesses to 30 in., widths to 63 in., and lengths to 185 in. Each plate is high-strength, dense, porosity-free, ultrasonically certified, and dimensionally stable. With consistent hardness surface to core, M-1 is fully weldable, hard-coat anodizable, and highly polishable. High-thermal conductivity and superior machinability make M-1 suitable for injection molds, blow molds, and RTM molds.


Wrought aluminum plate for blow, injection, and compression molds. Alcoa QC-7 mold plate for blow and injection molds where high strength, thermal conductivity, and hardness are needed. Also 6061 mold plate in two tempers and thicknesses from 6 through 20 in.


Copper alloys for blow and injection molds. High-conductivity alloys Ampco 97 and 940 provide thermal conductivity of 216 to 324 w/m-k and Rockwell B hardness of 94 to 77. Applications include molds, mold inserts, pinch-offs, blow and core pins.

Aluminum bronze alloys in a range of hardnesses and tensile/yield strengths for mechanical wear applications in guide, leader and ejector pins, bushings, slides, gibs, wear plates and unscrewing mold components.

Conventional machining and EDM methods can be used. Surface finishes of 4 RMS are possible. Suitable for numerous plating treatments and readily welded with Ampco-Trode weldrod as well as stainless-steel for localized hardening. Standard sizes of bar, rod, tube, and plate.


Tool steels include AISI 420 stainless-steel grades such as corrosion resistant M310 IsoPlast; S7 MQ mold quality S7 with good polishing characteristics; M314 Extra prehardened stainless steel; and a modified P20 grade, M238. Complete technical support for all applications.


Moldmax and Protherm beryllium-copper alloys. Benefits include similar mechanical properties as steel with increased thermal conductivity, resulting in reduced cycle times, reduced part variability, and better dimensional control.


Mold and tooling materials include stainless steels for molding highly corrosive resins, highly wear-resistant alloys for processing abrasive engineered resins, and prehardened tool steels for faster tool and mold fabrication.


Mold steels for structural sections include D-M-E No. 1 medium-carbon SAE 1030 grade; D-M-E No. 2 AISI 4130 grade, preheat-treated to 269-321 Bhn (28-34 Rc); and D-M-E No. 7 modified AISI 420-F holder-block stainless, preheat-treated to 305-342 Bhn (33-37 Rc).

Cavity and core grades include D-M-E No. 3 P-20 type steel preheat-treated to 277-331 Bhn (29-36 Rc); D-M-E No. 5 H-13 type hot-work steel, annealed to approx. 200 Bhn (13-20 Rc); and D-M-E No. 6 T-420 type stainless, annealed to 200-240 Bhn (14-23 Rc).


Hot-work mold steels are melted using V.A.D. degassing system. Many are further refined in a V.A.R. furnace for double-vacuum-produced products. Steels are upset-forged, utilizing wide dies with a minimum reduction of area of 5:1. AISI-type P-20 and 4140 steels are cold-water quenched for maximum grain refinement and through-hardening, and then machined and ultrasonically examined. Modifications available for P-20, 4140, Holder Block, 420 S.S. and H-13 (air-melted and double-vacuum-melted). (See ad p. 239.)


Five grades of tool steels include AISI/SAE types 1020, P20, and H13.


Easy-to-machine, stable NAK 55, 40 Rc prehardened mold steel allows for perfect weld repair. PX5, 32 Rc prehardened mold steel is easy to machine, and welds with no pre- or post-heating required. Porcerax II, permeable mold steel allows gas but not plastic to pass through.


High-conductivity, beryllium-free copper alloys for cores and cavities and aluminum bronze alloys for wear applications such as slides, wear plates, gibs, bushings, and ejector sleeves. Products include performance core pins and high-conductivity, copper-alloy core pins for cycle-time reductions and part-quality improvements.


Tool steels include:

* Thyssen Holder 4140 modified, preheat-treated (24/32 Rc) free-machining alloy steel designed for mold bases. High tensile strength.

* Thyroplast 2738 AISI P-20 modified, high-quality prehardened mold steel (28/34 Rc) for large molds requiring high core hardness.

* Thyssen P-20 Super AISI P-20 modified, prehardened (34/38 Rc) steel for molds requiring compressive strength, wear, toughness, and long runs.

* Thyroplast 2316 FM AISI 420 F modified, prehardened, Ca-treated (34/38 Rc), free-machining, corrosion-resistant stainless steel for mold frames, holders, and bolsters.

* Thyroplast 2083 Supra AISI 420 modified, annealed, electroslag-remelted stainless tool steel can be heat-treated to high hardness. Especially suitable for compression and injection molding.

* Thyrinox LBV AISI 420 Improved vacuum ATC remelted stainless mold steel with superior cleanliness provides optimum polishability and corrosion resistance.

* Thyrotherm 2344 Supra ESR AISI Premium H-13, annealed electroslagre-melted, high-performance tool steel with superior toughness for molds needing high wear resistance and polishability.

Nonferrous alloys include Thyssen Aluminum 6061 alloy for high thermal conductivity and good machinability; Thyssen Alumold high-strength, high-quality aluminum alloy for small to medium production runs with superior through-hardening ability, thermal conductivity, and high strength-to-weight ratio; and Thyssen beryllium-copper alloys for high thermal conductivity, good hardness, and machinability.


Mold steels include Impax Supreme (P-20 modified) premium-quality, prehardened grade with superior polishing and photo-etching properties; Orvar Supreme (H13 improved) through-hardening mold steel with superior machinability, polishability, and toughness; and Compax through-hardening steel with good toughness at high hardness and moderate wear resistance. Rigor (A2) is a medium-alloyed mold steel with high wear resistance. ASP 23 and Vanadis powder-metallurgy grades for very high wear resistance.

Stainless mold and holder steels offer low-maintenance, long-run operation. Grades specially developed for optimum tool performance include Stavax ESR (420 modified) through-hardening mold steel with good corrosion resistance, high wear resistance, and excellent polishability. Ramax S (420F modified) prehardened holder or mold-base steel has superior machinability and good resistance to indentation. Elmax wear-resistant powder-metallurgy stainless grade for cavity-insert molds that process abrasive engineering resins.

Complementary tooling products include Alumec 89 high-strength aluminum with superior machinability and polishability.
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Title Annotation:1998/1999 Manufacturing Handbook & Buyers' Guide
Publication:Plastics Technology
Article Type:Buyers Guide
Date:Aug 1, 1998
Previous Article:Blow molds.
Next Article:Hot-runner components and systems.

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