CN205254036U

CN205254036U - Aviation machine casket aluminium alloy casting insulation riser

Info

Publication number: CN205254036U
Application number: CN201520686282.5U
Authority: CN
Inventors: 杨庭彰
Original assignee: Harbin Futing Chuangfu Machinery Manufacturing Co Ltd
Current assignee: Harbin Futing Chuangfu Machinery Manufacturing Co Ltd
Priority date: 2015-09-08
Filing date: 2015-09-08
Publication date: 2016-05-25
Anticipated expiration: 2025-09-08

Abstract

The utility model discloses an aviation machine casket aluminium alloy casting insulation riser relates to metal processing technology field, and the improvement of concretely relates to aviation machine casket aluminium alloy casting insulation riser structure is technological. Including aviation machine casket aluminium alloy casting, sodium silicate sand rising head surface is cylindrical, and it is cylindrical that sodium silicate sand rising head hole upper portion is toper, the lower part of invering, and conical tip diameter is the same with cylindrical diameter, sodium silicate sand rising head outside cover is equipped with columniform rock wool insulation cover. The utility model provides an aluminum alloy aviation machine casket during fabrication, the rising head material can too early cooling, raw materials downward flow meeting has some setbacks in the rising head, leads to the fact the problem of sand hole.

Description

Aviation casing aluminium alloy casting insulated feeder

Technical field

The utility model relates to metalworking technology field, is specifically related to the improvement technology of aviation casing aluminium alloy casting insulated feeder structure.

Background technology

Aluminium alloy density is low, but strength ratio is higher, approaches or exceedes high-quality steel, and plasticity is good, can be processed into various section bars, has good electric conductivity, thermal conductivity and corrosion stability, is widely used in space industry. Some aluminium alloys can adopt heat treatment to obtain good mechanical performance, physical property and corrosion resistance. The aviation casing of aluminium alloy is in Foundry Production, and it is one of important measures that ensure casting quality that rising head is set, and its Main Function is that foundry goods is carried out to feeding. In Foundry Production, for improving casting quality and rising head utilization rate, generally can adopt insulated feeder. Insulated feeder is by controlling rising head heat waste, extends riser metal liquid setting time, improves riser supplement shrink efficiency. This not only can save riser metal liquid, and to improving casting quality important in inhibiting. The shape of existing insulated feeder generally adopts cylindrical and two kinds of forms of kidney-shaped. Because aluminum alloy materials is low compared with other material melting point, in the aviation casing casting of aluminium alloy, emit the gate material can be cooling too early, rising head Raw flows downward and can have some setbacks, and causes foundry goods sand holes.

Summary of the invention

The utility model provides aviation casing aluminium alloy casting insulated feeder, and the aviation casing that the utility model has solved aluminium alloy during fabrication, emits the gate material can be cooling too early, and rising head Raw flows downward and can have some setbacks, and causes the problem of foundry goods sand holes.

For addressing the above problem, the utility model adopts following technical scheme: aviation casing aluminium alloy casting insulated feeder, comprise aviation casing aluminium alloy castings, water-glass sand rising head outer surface is cylindrical, water-glass sand rising head endoporus top is that inverted taper, bottom are cylindrical, and the end diameter of taper is identical with cylindrical diameter; Water-glass sand rising head outside is set with columniform asbestos jack.

The utility model advantage: the taper of insulated feeder inner and upper and lower square cylindrical, form funnel structure, raw material flows downward smooth and easy, and foundry goods there will not be sand holes. Adopt rock wool heat-preservation nested structure, extend the cool time of aluminium alloy stock in rising head, guarantee the quality of aviation casing aluminum alloy cast forging piece.

Brief description of the drawings

Fig. 1 is the utility model structural representation.

Symbol description in figure: aviation casing aluminium alloy castings 1, venthole 2, running gate system 3, asbestos jack 4, water-glass sand rising head 5.

Detailed description of the invention

With best embodiment, the utility model is described in detail below。

As shown in Figure 1, aviation casing aluminium alloy casting insulated feeder, comprises aviation casing aluminium alloy castings 1, and aviation casing aluminium alloy castings 1 has venthole 2 above; Aviation casing aluminium alloy castings 1 bottom connects running gate system 3; Water-glass sand rising head 5 outer surfaces are cylindrical, and water-glass sand rising head 5 endoporus tops are that inverted taper, bottom are cylindrical, and the end diameter of taper is identical with cylindrical diameter; Water-glass sand rising head 5 outsides are set with columniform asbestos jack 4. The taper of insulated feeder inner and upper and lower square cylindrical, form funnel structure, and raw material flows downward smooth and easy, and foundry goods there will not be sand holes. Rising head and parts connecting portion diameter are formulated according to designing requirement; The overall wall thickness of insulated feeder is the key factor that affects feeding effect, too thin moulding difficulty, and heat insulation effect is poor; Too thick little on heat insulation effect impact, but increase cost, general wall thickness is got 15 ﹪-18 ﹪ of rising head diameter, the thinlyyest must not be less than 22mm.

Muff water-glass sand used is casting sand, addition type sandbinder and additional thing etc. when use, and Modeling Material mixes according to a certain percentage. Water-glass sand feature: 1, there is higher intensity and heat endurance, to bear the effect of various external force and high temperature. 2, good mobility, the ability that molding sand mutually moves between sand grains under external force or Action of Gravity Field own. 3, certain plasticity, molding sand is out of shape under external force, can keep the ability of the shape giving after external force is removed. 4, good gas permeability, molding sand hole sees through the ability of gas. 5, higher collapsibility, weighs up again grittiness, and after casting solidification, whether molding sand easily destroys, the performance of whether easily removing from foundry goods.

Muff rock wool used is a kind of flame-proof thermal insulation material, it adopts high-quality basalt, dolomite etc. is main raw material(s), the four axle centrifuge high speed centrifugations that adopt after more than 1450 DEG C high temperature melting become fiber, after spraying into a certain amount of binding agent, dust laying oil, water-repellent agent, collect, pass through pendulum method technique through cotton collecting machine simultaneously, after adding 3D approach paving cotton, be cured, cut, form the rock wool product of different size and purposes.

The utility model has following characteristics: 1, have good heat-insulating property; 2, there is good high-temperature flame-proof performance; 3, under high temperature, there is good chemical stability; 4, cheap, raw material wide material sources, easily buying.

Finally it should be noted that: obviously, above-described embodiment is only for the utility model example is clearly described, and the not restriction to embodiment. For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description. Here without also giving exhaustive to all embodiments. And the apparent variation of being amplified out thus or variation are still among protection domain of the present utility model.

Claims

1. aviation casing aluminium alloy casting insulated feeder, comprise aviation casing aluminium alloy castings, it is characterized in that, water-glass sand rising head outer surface is cylindrical, water-glass sand rising head endoporus top is that inverted taper, bottom are cylindrical, and the end diameter of taper is identical with cylindrical diameter; Water-glass sand rising head outside is set with columniform asbestos jack.