China CNC Foam Cutting Machine Supplier
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Eps block production process |
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Process 1 |
Eps granules pre foam |
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Process 2 |
Eps granules ripening |
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Process 3 |
Eps block forming |
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Process 4 |
Eps block drying |
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Process 5 |
Eps block cutting and package |
Eps raw chemicals
Basis: eps + foaming agent + fire retardant agent
Diameter: screening in making decide the diameter,nothing to do with foam block density.
Foaming agent: isopentane,it takes 4-6% of total weight.It is liquid state in eps granules at normal state.
Fire retardant agent: hexabromocyclododecane,HBCD
Storing environment: away from heat,sunshine,fire,static and to be ventilated.
Principle of eps pre foam
`Heating on steam will make the eps granules grow big,bigger size will make different density.
`Different volume of eps granules are up to temperature and heating time.
`Bigger volume,smaller density,lower density of eps block.
Continue eps pre foam machine
Feature
`eps granules feed into eps pre foam machine continually, foamed granules out from output.
Method to adjust the eps density
`adjust the steam volume supply
`adjust the supply of raw eps chemicals
`adjust the heighth of output device
Weekness
`foamed granules are not easy to control
`low productivity
`extra waste of energy
Batch eps pre foam machine
Feature
`eps granules are quantitatively feed into eps pre foam machine,foamed granules are out from machine to next cycle.
`adjust the steam pressure
`adjust the steam temperature
Advantage
`easy to control the eps density
`good productivity
`low energy consumption
Fluidize drying machine
Effect
Drying the surface of eps granules by blowing.
Density test
Tool: scale,barrel(1000L),template
Sample can be from machine output.
Test method:
Test barrel is full with eps granules,make it plane with template,test the weight.normally,density for eps foam is 0.5g/l heavier than block density
Process 2 Eps granules ripening
Principle for eps ripening
`The foaming agent and steam in the eps granules are cooled to be condensed,there will be vacuum in the granules.The process is in the eps silo system.
Tip
The foamed granules are soft and can be knead to be flat by figures.
The ripened granules are elastic.
Process 3 eps block forming
Principle of eps block forming
`The eps granules feed into eps block forming machine,the granules will be expanded under the heating of steam.Within the forming shape of machine,the big eps block will be formed.
Process
`Eps granules feeding into eps block forming machine thru eps silo with the work of eps blower.
`steam will make the eps granules into block by controlling the timing.
` Temperature will be cooled down thru the vacuum system.
` Door open and formed block out and door close.
Advantage of eps vacuum system
`The extra steam and foaming agent will be out thru the vacuum system.The water content will be less and fire retardant performance will be better.
`The productivity will be stronger.
Process 4 Eps block drying
Why it needs to be dried in hot dring room?
`it need time to be dried and strong to be stable in size.
`The water content and foaming agent in eps block need to be volatilized.
` it needs to be cared in high temperature
`it needs to be cared in natural temperature.
Process 5 Eps block cutting and packing
`Horizontal cutting wires
`Vertical cutting wires
`Down cutting wires
` automatic wires setting
` roll over feeding system
` eps shredder recycling system
` eps package machine
Myaid machinery supply eps insulation block machines,including prefoam machine,block molding machine,eps cutting machine and recycling machines from China.
Myaid Machinery
ADD: shijiazhuang city,050000,hebei province,China
Mobile&whatsapp: 0086 13833131292