FIELD: process engineering.
SUBSTANCE: invention relates to metallurgy. Proposed barrel comprises elongated tubular part 10 with lengthwise axis L, plate part 14 furnished with through bore 16 and peripheral area 22 between surface 18 and section 20. Through bore 16 is located between surface 18 opposite tubular part 19 and its section 20 abutting on said tubular part 10. Peripheral area 22 comprises two thrust surfaces 24. Every thrust surface 24 makes at least one curve of radius R2 located in imaginary plane perpendicular to axis L of moulding channel. Thrust surface 24 are opposed.
EFFECT: uniform distribution of strain in the plate.
15 cl, 6 dwg
