The invention discloses a device for measuring the process temperature of a screw rod and a material in a screw extrusion molding process of a screw extrusion propellant. The device comprises a motor, a guide screw rod, a stress ring sensor, a pulling force connecting rod, a bracket box, a pressure transfer sleeve rod, a test sample fixing cylinder, a weight, a constant-temperature cabinet, a frame, a test sample positioning rod and a computer, wherein the motor is connected with one end of the guide screw rod through a turbine worm; the other end of the guide screw rod is in bolt connection with the stress ring sensor; the frame is connected with the motor through a cross beam; the constant-temperature cabinet is mounted at the middle part of the frame, and the temperature in the constant-temperature cabinet can be kept and set; the fixing cylinder with openings at two ends is mounted in the constant-temperature cabinet, one end of the fixing cylinder is fixed on the inner wall of the constant-temperature cabinet, and the other end horizontally penetrates out of the side wall of the constant-temperature cabinet. The device can be used for testing the change relation between the temperature of the screw extrusion propellant material and shear force at a specific rotational speed and pressure, and the change relation can guide the technical personnel in the field to determine the process temperature of the screw extrusion propellant material and the screw rod so as to realize safety trial production of the propellant.

Device for measuring process temperature of screw rod and material in screw extrusion molding process of screw extrusion propellant

The invention discloses a self-feeding stirring head, a self-feeding friction stir extrusion method and device. The method comprises the following steps of firstly carrying out mechanical mixing on element powder or alloy powder, then carrying out self-feeding and material conveying and driving materials by a stirring needle to migrate to the outlet of a mold, and finally extruding the materials from the outlet of the mold for forming; the self-feeding stirring head comprises a clamping section, a feeding section and the stirring needle, wherein the feeding section communicates with the stirring needle, and the element powder or the alloy powder can enter a groove of the stirring needle through the feeding section; and the self-feeding friction stir extrusion device comprises the self-feeding stirring head. According to the self-feeding stirring head, the self-feeding friction stir extrusion method and device, full stirring, mixing and extrusion forming of the composite materials are realized, and meanwhile, the uniformity of the extrusion materials is improved.

Self-feeding stirring head, self-feeding friction stir extrusion method and device

Single screw extruder for forming propellant with high solid content

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Single screw extruder for forming propellant with high solid content