Flint extruding device and extruding method thereof

Abstract

The invention relates to a flint extruding device and an extruding method thereof. The flint extruding device comprises a sleeve mould, a bottom cushion, a bottom plate, an extrusion bottom mould, a sleeve mould fixing press plate and an extrusion rod, wherein the sleeve mould is arranged outside the extrusion rod, the upper part of the sleeve mould is fixed on the sleeve mould fixing press plate; the extrusion bottom mould is arranged at the lower part of the sleeve mould and is supported on the bottom plate by the bottom cushion; the extrusion rod is arranged in a heating furnace, and the outer side of the heating furnace is provided with a heat insulating layer; a plurality of extrusion holes are arranged in the extrusion bottom mould, the extrusion holes of the extrusion bottom mould are connected with a forming pipe, and a plurality of air inlets are arranged on the forming pipe and can input protective gas with pressure. Flints extruded by the flint extruding device has high sparking rat, low hardness, smooth and clean appearance, low labor intensity. The selling price of the flints is 1 to 2 times higher than the cost of the traditional flint, the electricity consumption is saved by 50 percent (about 25kw / hour), and the economic benefit is increased more than one time. The extruding method has simple and convenient operation and high efficiency.

Description

technical field [0001] The invention relates to a flint extruding device and an extruding method thereof, which belong to the modification technology of the flint extruding device and the extruding method thereof. Background technique [0002] The existing traditional production process of flint is smelting and casting in a cold casting mold, extrusion adopts a single-hole bottom mold extrusion, and the main raw materials of the formula are rare earth metals, and auxiliary materials such as iron, magnesium, zinc, and copper metal elements. Copper in the flint alloy will affect and hinder the ignition, but in the flint extrusion process, without copper element, it is difficult to extrude the flint sliver. If it can be extruded, it is also easy to burn. Adding copper elements mainly increases the extrusion flow rate and makes the strips smooth. This kind of flint production technology has a history of more than 50 years in China. Its disadvantages are high hardness, poor igni...

AI Technical Summary

Problems solved by technology

Due to the single-hole slivers, the extrusion speed must be fast, coupled with the fast transmission and pull of the belt, the slivers that come out have not yet solidified, which will cause non-standard specifications, and some will be pulled by the conveyor belt and the surface will be rough.

And because every time a spindle is extruded, it is necessary to change a bottom mold, replace the plug once, and remove the impurities in the mold core with a drill bit. What is more important is that the temperature of the sleeve mold and the bottom mold cannot be well matched (the sleeve mold , The bottom mold is heated by another electric furnace), the temperature at the beginning and end of extrusion is different, and the flint strips that come out are likely to be different, so the flint that comes out is also small in pyrophoric phase, low in brittleness, poor in appearance, and very poor in specification. Difficult to agree

In the past, people used the method of annealing to treat the flint again, which can only slightly improve the feeling of ignition, but can not change the problem of ignition, because annealing is the recovery of excessive rare earth crystallization and the stress generated by extrusion, which is harmful to the ignition phase. The size distribution of the

The device, process and formula of the single-hole extrusion device are adopted, and the extruded flint has poor ignition, high hardness, rough appearance, and high labor intensity.

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