Cooling core puller

Abstract

The invention discloses a cooling core puller. The cooling core puller comprises a core-pulling fixing base and a core pulling body which is detachably connected to the core-pulling fixing base, wherein one end, away from the core-pulling fixing base, of the core pulling body is a shaping end; the shaping end comprises an outer shaping part and an inner shaping part; the outer shaping part surrounds the inner shaping part, and a gap is formed between the outer shaping part and the inner shaping part; a first cooling water channel is arranged in the core pulling body; from the mounting end, away from the shaping end, of the core pulling body, the first cooling water channel sequentially passes through the inner shaping part and the outer shaping part, and finally returns to the mounting endof the core pulling body, so that a cooling water channel with inner and outer layers is formed in the core pulling body, and thus, cooling water uniformly cools the core pulling body by circulatinginside the core pulling body. The shaping end of the core pulling body is a structure with inner and outer layers, and the cooling water channel with inner and outer layers is arranged in the core pulling body, so that the cooling effect of a workpiece is improved, and the surface sintering and workpiece expanding and blocking problem is solved.

Description

technical field [0001] The invention relates to the field of die-casting molds, in particular to a cooling core puller. Background technique [0002] In the field of die-casting molds, lightweight aluminum alloy castings are becoming more and more popular. In the production process of lightweight aluminum alloy castings, at least the following problems exist in the prior art: [0003] Lightweight aluminum alloy castings cannot be produced stably and efficiently. Specifically, in aluminum alloy die-casting, when the aluminum alloy metal liquid impacts the core-pulling body, the temperature is about 630°C and the speed is 50m / s. When the aluminum alloy products around the core-pulling body The wall thickness is relatively thick, which brings a lot of heat to the core-pulling body; when the aluminum alloy product is formed, the temperature of the core-pulling body rises very quickly. Within 15 seconds of contact with the aluminum alloy, the temperature rises from 150°C to 400°C...

AI Technical Summary

Problems solved by technology

[0003] Lightweight aluminum alloy castings cannot be produced stably and efficiently. Specifically, in aluminum alloy die-casting, when the aluminum alloy metal liquid impacts the core-pulling body, the temperature is about 630°C and the speed is 50m / s. When the aluminum alloy products around the core-pulling body The wall thickness is relatively thick, which brings a lot of heat to the core-pulling body; when the aluminum alloy product is formed, the temperature of the core-pulling body rises very quickly. Within 15 seconds of contact with the aluminum alloy, the temperature rises from 150°C to 400°C; Under such harsh conditions of high temperature and high impact, the core puller is easily damaged: the surface of the core puller body is cracked and cracked, the surface is sintered, the size becomes larger after thermal expansion, and the gap between the core puller guide sleeves becomes smaller, resulting in the core puller body being stuck and unable to be pulled out

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