PVC sliding contact line rail extrusion die for building tower crane

Abstract

The invention relates to a PVC sliding contact line rail extrusion die for a building tower crane. The PVC sliding contact line rail extrusion die comprises an opening die, a support plate, a die bodyand a core rod, a cavity in the opening die is matched with a section structure of a PVC sliding contact line rail profile, two sets of special-shaped flushing devices are arranged at the positions,corresponding to an inner cavity of a PVC sliding contact line rail profile cavity, of a discharging port of the opening die, each set of special-shaped flushing device comprises a flushing cavity formed in the position, at the discharging position of the opening die, of the core rod, the side face of each flushing cavity is outwards connected with a water inlet pipe, the water inlet pipe is led out from a gap of the PVC sliding contact line rail profile cavity so as to avoid interference, and each inner cavity, facing the PVC sliding contact line rail profile cavity, of the cavity wall of each flushing cavity is provided with a water injection nozzle. Although the improvement is simple, the traditional mold structure for cooling and shaping from the outside of the profile is changed, so that the molding quality of the produced PVC sliding contact line rail profile is greatly improved, and the rejection rate is reduced.

Description

technical field [0001] The invention relates to the technical field of profile extrusion dies, in particular to a construction tower crane PVC trolley line rail extrusion die. Background technique [0002] The sliding contact line on the building tower crane is usually a relatively standard track made of extruded PVC profiles. This profile track is conducive to standardized laying and installation. The profile structure has symmetrically arranged cavities on both sides. There are also small chambers with small compartments (see attached figure 1 ), the profile of this type of cavity usually does not have a shaping mold at the molding exit, but is provided with a water tank for cooling, but even in this case, the small cavity inside the profile often leads to corresponding sliding contact grooves If there is deformation and bending, such a trolley line track must be unqualified, which will affect the safety of actual use. Contents of the invention [0003] The object of t...

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Problems solved by technology

[0002] The sliding contact line on the building tower crane is usually a relatively standard track made of extruded PVC profiles. This profile track is conducive to standardized laying and installation. The profile structure has symmetrically arranged cavities on both sides. There are also small chambers with small compartments (see attached figure 1 ), the profile of this type of cavity usually does not have a shaping mold at the molding exit, but is provided with a water tank for cooling, but even in this case, the small cavity inside the profile often leads to corresponding sliding contact grooves If there is deformation and bending, such a trolley line track must be unqualified, which will affect the safety of actual use

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