CN203209669U - Novel foamed aluminium die - Google Patents

Abstract

The utility model discloses a novel foamed aluminium die. The foamed aluminium die comprises a bottom plate and four side plates which are in an integrated structure. The foamed aluminium die is characterized in that the die is made of plastic die steel 3Cr2Mo, and a plurality of circular grooves are uniformly formed in outer side surfaces of the bottom plate and the four side plates. By the aid of the foamed aluminium die, the transfer of the internal stress in a material is effectively prevented by the circular grooves, the stress action applied to the die is reduced, the service life of the die is prolonged, the production cost is reduced, and the contact area between the die and a cooling medium is increased, so that a product can be cooled quickly, the production efficiency is improved, the maximum size of produced foamed aluminium can be up to 2600mm*1000mm*600mm, the product is complete in shape, the die is small in deformation, and demoulding is facilitated.

Description

The novel foam aluminum die

Technical field

The utility model relates to and belongs to foamed aluminium equipment manufacturing technology field, is specifically related to a kind of novel foam aluminum die that solves the big problem of super large-scale foam aluminium plate die deformation.

Background technology

Foamed aluminium is a kind of similar foamed light metal material of the countless bubbles that distribute in aluminum substrate, and general porosity is 40%-98%, and it has the feature of bubble and metal simultaneously concurrently, is a kind of novel function and structure-integrated engineering material.Characteristics such as foamed aluminium has the porosity height, density is low and specific area is big, thereby have characteristics such as sound-absorbing, heat insulation, energy-absorbing, bradyseism and electromagnetic shielding.This material is with a wide range of applications, and can be applied to fields such as traffic, building, metallurgy, machinery, communication, chemical industry and aerospace engineering, becomes one of country's heat subjects in investigation of materials such as China, Japan and America and Europe in recent years gradually.

Because the interior new demand to following material of world wide, add domestic continuous attention to environmental protection, field such as energy-conservation, promoted the development at home of foamed aluminium industry, but domestic research for the foamed aluminium industry at present is confined to the moulding technique aspect mostly, and very few for the research of foamed aluminium mould aspect, in particular for producing the mould of super-huge foamed aluminium.At present foamed aluminium production industry; the type of cooling of foamed aluminium after moulding generally is along with the mould Forced water cooling; can be known by thermodynamics knowledge; the mould of same material; dimensions is more big; the high temperature fluent metal of the filling in the mould is more many; its amount of stored heat is just more many; just more big in especially spray water in the Quench process suffered internal stress of cooling so; if mould is not well protected; then can produce huge distortion; not only can cause the foamed aluminium product after the moulding to take out from mould smoothly; and the service life that can reduce mould, therefore the direct economy consequence of its generation is the increase of production cost, how effectively to reduce the development that distortion that mould produces in the process of catching a cold and being heated repeatedly hampers the foamed aluminium die industry always.The exploitation of foamed aluminium practical system technology for making that ship heavy industry 725 has taken the lead in realizing at home at present, but and prepared the earliest 1500mm * 500mm standard specification that engineering uses foamed aluminium mould and obtain to use, and the foamed aluminium that most of companies produce generally all rests on 600mm * 600mm or 500mm * 500mm level, mostly be most 800mm * 800mm abroad at present, why this situation can occur, wherein one of factor is exploitation and the application that is limited by the foamed aluminium mould.

Summary of the invention

The purpose of this utility model is at the present big problem of existing die deformation in producing large-size foamed aluminum sheet material process, a kind of novel foam aluminum die is provided, adopt this mould, the foamed aluminium full-size of producing can reach 2600mm * 1000mm * 600mm, and shape is complete, die deformation is little, is convenient to the demoulding.

The utility model adopts following technical scheme: comprise into a single integrated structure base plate and four side plates, mold material adopts plastic die steel 3Cr2Mo, and the outer surface of described base plate and four side plates is provided with several annular groove.

Its principle is: aspect the selection of mold material, adopt plastic die steel 3Cr2Mo, its comprehensive mechanical property is good, and the quenching degree height can make the steel of larger cross-section obtain hardness uniformly, and have good polishing performance, the mold surface finish height.Show by experiment when using this steel mfg. moulding die, both guaranteed the serviceability of mould, avoid again repeatedly be heated and cooling procedure in caused die deformation.To mould base plate and the outer surface of four side plates process, several annular grooves of setting keep a determining deviation between each annular groove, the set-up mode of annular groove is roughly evenly to distribute.Aspect Mould Machining, present most of mould producer adopts the mode that reinforcement is installed to stop the distortion of mould, has both increased the weight of mould, has increased the production cost of foamed aluminium again.Annular groove can stop the transmittance process of internal stress in the material effectively in the process of mould expanded by heating and cooling contraction, reduce the suffered stress effect of mould.

The utility model is applicable to production process fully, annular groove has not only effectively stoped the transmission of internal stress in the material, reduced the suffered stress effect of mould, prolonged the service life of mould, reduced production cost, also increase the contact area of mould and cooling medium (air, water, wet goods), product can be cooled off fast, improved production efficiency.Adopt this mould, the foamed aluminium full-size of producing can reach 2600mm * 1000mm * 600mm, and shape of product is complete, and die deformation is little, is convenient to the demoulding.

Description of drawings

Fig. 1 is die shape of the present utility model and annular groove structure distribution schematic diagram.

Fig. 2 is the structural representation of annular groove.

Fig. 3 is the cross-sectional view of Fig. 2.

The specific embodiment

Below in conjunction with specific embodiment, the utility model is elaborated.

1, the material that adopts of the utility model embodiment is 3Cr2Mo mould steel, and chemical composition is as shown in the table:

The chemical composition of 3Cr2Mo steel (GB/T1299-2000) w/%

C

Si

Mn

P

S

Cr

Mo

Ni

0.28～0.40

0.2～0.8

0.6～1.0

≤0.03

≤0.03

1.4～2.0

0.30～0.55

0.85～1.15

In order to verify the feasibility of this material, we adopt the method for experiment to compare original material and the institute's distortion situation of the material of using after being heated repeatedly and cooling off at present, and the former employed material of this mould is 3Cr ₂W ₈V, the foamed aluminium mould major defect in use of this kind material is that fragility is big, and thermal fatigue resistance is not enough, is easy to generate defectives such as be full of cracks, distortion when standing rapid heat cycle.

Experimentation is employed to be 3Cr2Mo mould steel and 3Cr ₂W ₈The specification of V mould steel is length * wide * height=150mm * 50mm * 10mm, experimentation is divided into two groups, one group is that the surface does not have treated sheet material, the present embodiment of another group, comprise into a single integrated structure base plate and four side plates, mold material adopts plastic die steel 3Cr2Mo, the outer surface of described base plate and four side plates is provided with several uniform annular grooves, and (surface is through annular groove processing, the mode arranged evenly of annular groove is the array concentric circles), test employed equipment the digital display altimeter is arranged, the gasoline flame gun, strong cold water rifle, experimental data such as following table 1, shown in 2:

The surperficial undressed sheet deformation data unit of table 1: mm

Table 2 surface is through the sheet material unit of annular groove processing: mm

Data show by experiment, and no matter whether the surface through handling, repeatedly be heated and cooling condition under, the performance of 3Cr2Mo mould steel sheet material all is better than 3Cr ₂W ₈The performance of V.

The utility model is processed die bottom plate and four side plate outer surfaces, utilize " annular groove " structure that material deformation is enclosed in the particular range, thereby reduce water-cooled central area 2 drastic deformation to the influence at other positions, the finished surface schematic diagram as depicted in figs. 1 and 2, formed annular groove 1 zone at die surface, form and cut off annular groove, water-cooled zone 2 drastic deformation are cut off the influence at other positions.

A kind of improvement is that the mode arranged evenly of described annular groove is the array concentric circles.This structure is convenient to processing, prevents that thermal deformation is effective.

Those of ordinary skills can be improved or conversion according to the above description, and the equivalent transformation of homogeneous structure all belongs to protection domain of the present utility model.

Claims (2)

1. a novel foam aluminum die comprises into a single integrated structure base plate and four side plates, it is characterized in that: mold material adopts plastic die steel 3Cr2Mo, and the outer surface of described base plate and four side plates is provided with several uniform annular grooves.

2. a kind of novel foam aluminum die according to claim 1, it is characterized in that: the mode arranged evenly of described annular groove is the array concentric circles.

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