Hot Core Shooting Machine For Valve Production - China

The hot-box processes has very high demands concerning the quality of the quartz sand.

In particular, the percentage of alkalis and the clay content need to be as low as possible.

Gas extraction from hot-box cores is of particular importance for organically bound mold materials since the binders largely decompose under the casting conditions.

Pyrolysis (i.e. the decomposition of binders due to heat) generates breakdown products from the binder components, such as hydrogen, carbon monoxide, methane, carbon dioxide, nitrogen and higher-order hydrocarbons.

The resulting core gases have to be extracted by means of particularly effective measures.

Ideally, they are extracted via the core prints.

The dynamics of gas evolution have a significant impact on the tendency towards defects.

Hot-box binders based on phenolic resin show a favorable gas evolution behavior.

In addition, this process involves a relatively low binder content, ensuring good permeability to gas which also reduces the tendency towards defects.

The hardening of hot-box cores is carried out in metal core boxes.

The heating elements are integrated into the core boxes.

Direct heating can be accomplished using electric hot plates or gas-fired hot plates.

Generally, electrical core box heating is preferred for small cores.

What is important is that the core box is completely enclosed in order to evenly supply heat to the core.

If the core box equipment includes a recess (mandrel) or a larger core box bottom, these are separately heated by means of integrated cartridge heaters.

if any requirement please feel free to contact us cassie(AT)besttechmachine ry.

com

Company Contact:

• Posted By: Qingdao Bestech Machinery Co.,Ltd

• Phone: +8653286168115

• Address: 204 national road,huangdao district,qingdao of China, qingdao , shandong , China

• Email:

• Website: https://www.bestechfoundry.com

• Business Description: qingdao bestech machinery specialized in shot blasting machine,foundry machine,dust collector for many years and we have mature technology,if any requirement please feel free to contact us