Coupling or movement control for injection tools - has mechanical locking ensuring sec. parting plane is moved into open position before main parting plane is opened

摘要

Invention relates to a coupling and/or movement control device for moulding tools, esp. injection tools which have both main and sec. parting planes. During opening of the tool closure unit the main and sec. parting planes are opened in a pre-determined sequence. Mechanical locking system works in conjunction with both tool components forming the main parting plane and fixes the locked position of these components, until all components forming the sec. parting plane have moved into the open position. Each mechanical locking system has a coupling bolt on one of the components forming the main parting line and a coaxial coupling in the other component. Coupling is connected to a further moving tool component forming the sec. parting plane. Coupling houses a coupling bush with limited movement and which surrounds the free end of the coupling bolt, but is also fixed to the tool half enclosing the coupling sleeve. Radially moving claws seated in the coupling bush walls engage with radial recesses in the coupling bolts. USE/ADVANTAGE - Device is used on tools, esp. injection tools used for metal and plastics, works in conjunction with opening and closing of the tool and is compact and guarantees the correct sequence of opening of main and sec. parting lines.