Suggestions for Multi-Cavitiy Dies
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Suggestions for Multi-Cavitiy Dies

Views:2     Author:Site Editor     Publish Time: 2021-07-01      Origin:Site

Since the aluminum profile was born, it has experienced a vigorous development, and every year with a speed of nearly 20 ~ 25% in the development. With the progress of The Times and the development of science and technology, improving production efficiency has become the greatest competitiveness of the aluminum extrusion industry, so the Multi-cavity Dies came into being.

How to use a Multi-cavity Dies correctly? How to deal with the problem when extrusion? How to correct the dies? Today let’s discuss about it here.

1. Strict implementation of aluminum extrusion process rules and regulations

Before the press running,billet furnace temperature setting in 530-550 ℃, the temperature of outlet in 480-500 ℃, heating time should be enough to ensure fully and evenly heating from the surface to the central of the billet . Only after that can we avoid die elastic deformation increases, exacerbating "ovality" and "different length" phenomenon occurs, even make the die deformation and scrap.


 

Billet

1st

2nd

3ed

~

Last

Billet Length(mm)

450

800

800

~

800

Billet Temperature:   head-middle-tail (℃)

490-480-460

480-470-450

470-460-440

~

460-450-430

Containaer Temperature(℃)

410

410

410

410

410

Die Temperature(℃)

470±10

Die Heating Time (Hours)

6-8

Traction(Kg)

20

20

20

20

20

Extrusion Speed(mm/Sec)

2.0-5.0

7

8

~

9



2. Choose reasonable support for die assembly, use proper distribution

It is necessary to select the proper size of the double cavities sub- bolster, in order to reduce the elastic deformation of the die plate, so that the extrusion aluminum products formed stable, less dimensions change. And note that prepare correct bolsters in advance, so as to avoid the die come out of the oven for long time, and cooling down.

Here is our distribution for your reference 

image1


3. Make sure three “central points” in same level line.

The center of the extrusion container, the center of the billet and the center of the die base must be concentric, and no obvious eccentricity is allowed,otherwise it will affect the flow of the profile, even affect the profile shaping and producing can not proceed.

image4


4. Working belt should be perfectly smooth and flat.

Whether it is the first processing of the die or to doing die correction, working belt is critical to production results, slow wire cutting machine is better for processing the die, correct polish way should be trained for die corrector. 

image5

                                                                                                                                   Right way of belt Polishing

Extrusion with mult-cavity dies has a series of excellent characteristics, which is of great practical significance to improve production efficiency and yield. In addition to what’s mentioned above, improving the quality of H13 die steel, optimizing die’s structural design and processing technology and configuring scientific front and rear equipment, all steps must be linked excellently together to obtain the best results.

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