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Qingdao Shengmei Machinery Co.,Ltd

Address: No.6 Wangjialou Industrial Area, Huangdao District, Qingdao City, China

Contact: Sandry Pang

TEL: +86-532-85131608

Moblie: +86-18660248878

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Email: shengmei@shengmeicast.com

Lost Foam Casting Machine Vibrating Table

Lost Foam Casting Machine Vibrating Table

Lost foam equipment for white side 1.lost foam sand conditioning 2.three-dimensional vibrating table 3.turn over machine 4.steam foaming machine 5.molding machine

Product Details

How the LFC technology Works 

Process:
First, a pattern is made from polystyrene foam, which can be done by many different ways. For small volume runs the pattern can be hand cut or machined from a solid block of foam; if the geometry is simple enough it can even be cut using a hot-wire foam cutter. If the volume is large, then the pattern can be mass-produced by a process similar to injection molding. Pre-expanded beads of polystyrene are injected into a preheated aluminum mold at low pressure. Steam is then applied to the polystyrene which causes it to expand more to fill the die. The final pattern is approximately 97.5% air and 2.5% polystyrene. Pre-made pouring basins, runners, and risers can be hot glued to the pattern to finish it.

Next, the foam cluster is coated with ceramic investment, also known as the refractory coating, via dipping, brushing, spraying or flow coating. This coating creates a barrier between the smooth foam surface and the coarse sand surface. Secondly it controls permeability, which allows the gas created by the vaporized foam pattern to escape through the coating and into the sand. Controlling permeability is a crucial step to avoid sand erosion. Finally, it forms a barrier so that molten metal does not penetrate or cause sand erosion during pouring. After the coating dries, the cluster is placed into a flask and backed up with un-bonded sand. The sand is then compacted using a vibration table. Once compacted, the mold is ready to be poured.

Automatic pouring is commonly used in LFC, as the pouring process is significantly more critical than in conventional foundry practice.

There is no bake-out phase, as for lost-wax. The melt is poured directly into the foam-filled mold, burning out the foam as it pours. As the foam is of low density, the waste gas produced by this is relatively small and can escape through mold permeability, as for the usual outgassing control.


Process & Operating principle

1. Mold foam pattern sections.

2. Age pattern to allow dimensional shrinkage.

3. Assemble pattern if it is a multiple piece pattern.

4. Build cluster (multiple patterns per cluster).

5. Coat cluster.

6. Dry coating.

7. Compact cluster in flask.

8. Pour metal.

9. Suction air from flask.

10.shakeout


lost foam equipment for white side

1.lost foam sand conditioning 


2.three-dimensional vibrating table


3.turn over machine


4.steam foaming machine 


5.molding machine


Welcome to buy the lost foam casting machine vibrating table with low price from us. We are one of the leading and successful suppliers in China. We also welcome the customized orders. You can reach us at 86-18660248878.
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