| 摘要 |
FIELD: manufacturing of metal pipes with internal surface coated with polymer, particularly, manufacture of metal-polymer pipes. SUBSTANCE: die head has die accommodating core in its internal channel. Core has axial and streamlined supports. External surface of core and internal surfaces of die form circular molding slot. Axial support is made for radial shifting and locking. Core is made for turning round streamlined support. Device for shifting and locking of die head core has carrier installed for engagement with core shank. Carrier has shifting and locking members. Carrier is rigidly mounted on circular member installed coaxially to shank axis. Shifting and locking members are located in radial directions for engagement with circular member and die head body. EFFECT: higher accuracy of core locking. 3 cl, 3 dwg
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