The weather is wet. How can the metallurgical industry prevent the mould from sticking and damage the moldjiu0 edited on2017-06-10 03:11:40 63 views
The weather is wet. How can the metallurgical industry prevent the mould from sticking and damage the mold
Attention to powder moisture: powder generally through ingredients, but also through pre burning, control powder moisture content.
Pre cooked powder is best to be sealed in wet weather, and do not touch the air at will.
First, preparation before repression:
1. Prepare the powder for pre burning. In many products, quality requirements are not high, such as magnesium and zinc products, raw materials for mechanical granulation, humidity generally depends on the sun under the sun.
This humidity is generally not controlled accurately, as far as possible to choose the pre burning powder, control humidity.
2. review the moisture of the raw material before pressing. Because of the wet weather, many powders are exposed directly to the air and are liable to cause moisture in the powder. Check the humidity of the powder before pressing.
3. make mold polishing. Usually dry powder, ordinary finish generally won't stick mold. But if the powder is wet, it needs to strengthen the surface smoothness of the mold.
Two. In the process of pressing:
1, when pressing, pay attention to whether the mold has sticky die:
Powder metallurgy powder to ensure a certain amount of water, when pressed to achieve the best results.
If the powder is too dry, it may cause delamination.
If the powder is too wet, it will cause mold sticking.
And the polishing of the mold can not solve the problem.
Serious mold will cause heavy billet (heavy blank refers to the automatic press, when pressing products, the first product because of the mold, or push material reasons, but also in the mold cavity, second times and fill, suppress),
This will cause the die stress is too large, and crushed.
2, in the process of pressing, more observation, found problems, promptly ruled out.
The mold of the mold in general will not be too short a short time, as long as the attention to observe, when problems are found, timely processing, excluding, or will not damage the mold.
published on：20170610 03:11:40 guangzhou
category： Home Moisture