DF 82
Quick-Change Double H frame features and applications This MUD ® Quick-Change frame series features a fixed center runner bar for simultaneous molding with four standard-style companion insert molds. The series offers cost reduction benefits and time-saving advantages similar to the U frame and H frame series. It also provides comparable design flexibility. Each of the four companion insert molds for Double H frames can be changed individually and independently. Dummy inserts or runner shutoffs are available for molding with fewer than four insert molds. These features give the Double H frame series maximum versatility for tailoring production to inventory require- ments including just-in-time scheduling. Double H frames also offer special advantages for high volume production. Simultaneous molding with four insert molds quadruples quantities for each cycle. Also, there is virtually no need to interrupt production for maintenance or repair since inexpensive backup insert molds can be installed quickly. Double H frames are supplied with hardened center runner bars and replace- able sprue puller pin assemblies. Each frame includes a locking locating ring and an integral master ejector plate with cutouts to allow installation of insert mold pillar posts. The master ejector plate is also supplied with positive aligning guide posts, bushings and grease fittings for a guided ejector system. Options include interlocking ejector rails to lock the insert mold’s ejector system to the master ejector plate. The master ejector plate can be spring loaded for returning the insert mold’s ejector system. It can also be tied to the machine’s hydraulic knockout system for stroking the insert mold’s ejector assembly. Other options include water lines in the center bar or other locations, insulation boards, runner shutoffs and hot sprue bushings. Frame spacer bars to accom- modate shorter, more economical companion insert molds are available for frames designed for longer sizes. Additional retainer slots and a spacer plate in the frame’s cavity half allow the frame to accept insert molds with different thicknesses. Quick-Change Hot Runner Molding All of the advantages of the MUD®Quick-Change Concept can be added to a hot runner molding system with the addition of a manifold to the Double H frame. Both the frame and the hot runner system remain in the molding machine. Only the insert molds are changed to produce new parts, just as in other Quick- Change applications. This means faster changeovers, lower tooling costs and greater scheduling flexibility for hot runner molding. Steel specifications: Standard frames are produced in prehard steel (285-325 Brinell) with hardened center sections. Frames are also available in prehard stainless, 420 stainless, H-13 and other grades on request. Frame coating can be specified.
Quick-Change Double H frame options
Spring-loaded master ejector plates
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Interlocking ejector rails
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Additional height on ejector rails
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Early return on ejector system
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Special knockout hole locations
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Runner shutoffs
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Choice of runner configuration
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Frame spacer bars
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Insulation boards
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Additional retainer slot and spacer plate
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Water lines for center sections
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Water lines for rails and plates
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Machining for cartridge heaters
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Manifold for hot runner operation
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Hot sprue bushings
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Coating options
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Electroless nickel plating
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NOTE: Specifications subject to change without prior notice.
U.S. 800-626-6653 • dme.net • store.dme.net Canada 800-387-6600 • Mexico 52-442-713-5666
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