Pouring system for vacuum die casting of profiled optical fiber module and die casting process of pouring system

Abstract

The invention discloses a pouring system for vacuum die casting of a profiled optical fiber module and a die casting process of the pouring system. The pouring system and the die casting process comprise (1) calculation and simulation of the pouring system; (2), design of a vacuum-pumping system; (3), selection of an aluminum alloy material; (4), alloy smelting; (5), design of a mold heating system; (6), design of the die casting process. The process steps are simple, operability is high, and the service life of a mold is prolonged; by means of the process, the uniformity of poured molten metal is further improved through improvement of a pouring mouth, the situation that the molten metal cannot enter a cavity smoothly for die casting due to accumulation of the metal liquid is prevented, the die casting efficiency is improved, and a casting generated through die casting in a vacuum state is high in quality; and the direction that the molten metal enters the mold cavity is controlled, the flowing process that the molten metal enters the mold cavity through the pouring system is effectively controlled, the mixed degree between the molten metal and the air is lowered, the overall filling of the molten metal in the mold is good, the proportions of surface bubbling, surface flow liner, loose structure, low intensity and decrease of electric conductivity of an aluminum alloy thin-walled workpiece product are lowered, and the qualified rate of the product is increased.

Description

technical field [0001] The invention belongs to the technical field of forming and processing of miniature thin-walled metal parts. Specifically, it relates to a pouring system and a die-casting process for vacuum die-casting of special-shaped optical fiber modules, which is especially suitable for die-casting parts of heterogeneous and special-shaped aluminum alloy shells. Background technique [0002] The die-casting of aluminum alloy parts is to pour molten aluminum alloy into the pressure chamber of the die-casting machine, and through the movement of the injection punch, under the action of high pressure, it is filled into the cavity of the die-casting model at a high speed, and the aluminum A method in which alloys are solidified under pressure and formed into aluminum alloy die castings. The die-casting produced has high dimensional accuracy, smooth surface and clear outline. The other largest market for aluminum alloy die-casting products is the communication indust...

AI Technical Summary

Problems solved by technology

Such large die-casting parts generally have complex shapes, and most of them are shell-type die-casting parts. The runner structure of the die-casting mold needs to be comprehensively arranged according to the structural characteristics of the product. It is necessary to ensure the smooth flow of the aluminum liquid in the cavity and avoid At the same time, it is necessary to reduce the scouring of the mold core by aluminum water, reduce the strain defect of the product and improve the life of the mold. Therefore, a reasonable gating system is extremely important for aluminum alloy die-casting, which can not only reduce the difficulty of on-site process debugging, but also It can guarantee product quality, improve the qualified rate of die-casting products, and increase the efficiency of enterprises. The most common defects of aluminum alloy die-castings are surface blistering and loose structure, which lead to reduced strength and reduced electrical conductivity, which cannot meet quality standards and lead to high product defect rates. , seriously affecting the normal production of the product

What's more serious is that some defects are difficult to detect in the semi-finished products of die castings, but they will be revealed in the subsequent processing technology, such as electroplating, which will undoubtedly cause more serious losses to production

There are many reasons for the above defects, but in the prior art, the design of the mold gating system and the improvement of the die-casting process are adopted, but the fundamental problem cannot be solved. Therefore, in addition to the design of the mold gating system and the improvement of the die-casting process, it is necessary to Detailed study on the refining and refinement of front materials

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