Paper Egg Tray Production Line description of proudction pro

Paper Egg Tray Production Line description of proudction process as follow:

Waste paper is put into hydrapulper to beat pulp around 4% consistency, pulp through virbrating screen and refiner becomes cleaned & refined, then diluted and agitated in U/G civil works pools. Waterproof agent like AKD or rosin wax/aluminium Sulpahte, coloring diestuff may be added if required. At this stage the working pulp is to be diluted around 1% consistency.


 
The ready working pulp is pumped into the pulp chest beneath the rotary molder. The molder is rotary type with each mold platen fitted with 4 egg tray molds. When the fully automatic molder rotates in 180 degree each cycle, the bottom platen's 2 molds are immersed into pulp chest, through vacuum suction wet trays(pulp fibres) are formed and deposited on forming mold screens and excess water is returned to pulp chest for re‐use. The excess pulp above pulp chest level is automatically flowed back to pulp pools for recyclable use. Both the front and back side of molder is fitted with high pressure water spraying system for automatic non‐stop mold cleaning and egg tray edge washing each cycle. The excess white water after vacuum‐suction is pumped into a U/G civil works white water pool, and this white water is repumped back to hydrapulper or U/G pulp pools for recyclable use.
 
At the front side(facing the dryer),one transfer mold platen(with 2 egg tray transfer molds) comes close to forming mold and through vacuum & compressed air the 2 wet trays are delivered from forming molds(via compressed air blowing) to transfer mold(via vacuum suction). Then the transfer molds in a robot manner put wet trays(via compressed air) onto the moving dryer conveyor, and repeat another cycle. Each cycle takes 7 seconds or more depending upon drying effect.
 
The dryer is pass tunnel conveyor type(single drying line and multi-layer drying line in according to our customers' request) in 3 independent modules(zones). Each module(zone) has independent gas or diesel‐fired burner,temperature control, air recirculating fan & air diffuser. Each module's temperature can be adjusted independently to reach curved drying so as to avoid tray deformation to the minimum.
 
At the exit of drier there is facility of automatic collecting,counting and stacking of final dry trays into bundles.

As the founder of paper and plastic industry in China,Longkou YIHAO Machinery Equipment CO.,LTD established in 1978.Near 40 years'technology accumulation,Our main products :egg tray machine,egg tray making machine,egg tray production line,pulp molding machines and plastic foaming machines etc,we have attained the certification of Europe CE and our company has independent import and export rights.

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