Working Process
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Working Process

Frozen Shot Cryogenic Deburring Machine Working Process


Process Descriptions
The moulded parts are placed in a perforated stainless-steel basket and inserted into a highly insulated blast chamber. Liquid nitrogen is injected into this chamber in which the basket with your moulded rubber parts is mechanically rotated to expose all parts to the blast media. Liquid nitrogen lowers the temperature (some cases up to -130°C) while freezing the rubber to make it brittle. A unique high-speed (up to 7,000 rpm) impeller directs and throws plastic shots at the tumbling parts into the rotating basket. Travelling at high-speed, these small pellets cleanly trim off the brittle flash leaving a high quality, flash less molding. The machine separates reusable media from debris (flash and dust).Parts that have thin flash can be quickly and thoroughly cryogenic deflashed.

Operation Process of the Cryogenic Deburring
Step A:
After precooling the machine inner chamber, set the parameter on the touch screen which is suitable for the parts to be processed.
Step B: Open the door, take out the barrel, put the part to be deflashed into the machine basket and close the door.
Step C: Press the cycle start button on the touch screen to let the moulded parts to be processed automatically.
Step D: When one cycle is finished, press the cycle stop button to stop running and take out the finished parts which are successfully trimmed. After this, another cycle can be started.

Parameter Setting Principle

Six main parameters, temperature, wheel speed, barrel speed, and processing time, media size and cycle quantity

Temperature: The cooling temperature to freeze the flashes

Wheel speed: Decide the power shot on the flashes with media

Barrel speed: The tumbling speed of the barrel to keep all the parts be blasted.

Processing time: Processing time depends on the processing result and quantity of the parts.

Media size: 0.5 0.75 1.0 1.2 and 1.5mm, each one has different power.

Cylce Quantity: The quantity of parts can be processed    

Pege always use these 6 parameters to describe the right processing conditions and adjust gradually to find the best one.

Here is an example of cryogenic deflashing process on the rubber components to show the parameter and productivity. 

Part Name: Rubber Bumpers  Material: EPDM   Single Weight: 10g/PC(100pcs/Kg)    Flash thickness: Less than 0.2mm

Machine Model: PG-80T

Process paramter: Temperature( -75℃ ), Blasting Speed (6500rpm), Rotation Speed(20rpm), Time (5.5mins), Media(1.0mm), Cycle Qty(6kg)

Cyle Quantity: 6kgs

Cycle Time: 5.5mins

Affiliated time: 2mins

Cycles in one Hour: 8 Cycles

Quantity per Hour: 48kgs

Productivity per Day: 384Kgs

According to our years of experiences, cryogenic deflashing machine running cost for one hour is about $18/hour.

Cost per cycle: $2.3

Single Part Cost will be: $2.3/6kg(600pcs)=$0.0038/pc

Cryogenic Deflashing Machine generel production efficiency is very high and single part deflashing cost is low.

The smaller the part is,  the lower cost the deflashing cost will be.

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