Patent ID: 7753671

Claim:
A molding system, comprising: an extruder, including: an injection housing; a barrel assembly being supported by the injection housing, the barrel assembly including: (i) a low pressure section being coupled to a feed throat of the extruder, and the low pressure section receiving, in use, a flowable molding material from the feed throat, the injection housing supporting, at least in part, the low pressure section; and (ii) a high pressure section being coupled to the low pressure section; and the injection housing including: (i) a load ring abutting the high pressure section; (ii) a yoke supporting, at least in part, the high pressure section, and the yoke being attached to the injection housing; and (iii) a yoke locating pin interacting with the yoke and the injection housing so as to align the yoke with the injection housing; and a mechanical fuse assembly being placed between: (i) the injection housing of the extruder, and (ii) the barrel assembly of the extruder, the mechanical fuse assembly being configured to permit movement of the barrel assembly, the mechanical fuse assembly being coupled to: (i) the injection housing, (ii) a first flange of the low pressure section, the mechanical fuse assembly including: a core body; and a frangible part being shearable from the core body, and under a fuse overload condition the frangible part being shearable wring from the core body, the fuse overload condition existing when: (i) a piston of a screw actuator becomes bottomed out against a bottom of a rod side of the screw actuator, and (ii) a screw that is attached to the screw actuator and the low pressure section becomes cooled off enough so that the screw becomes welded to the low pressure section, and the screw begins to shrink, and under presence of a pull back force, the mechanical fuse assembly remaining unblown.