Boot preparation:
(1) Check whether the pressure of water, steam and compressed air is stable and normal, and bypass the trap on the steam line to discharge the cold suspect water; power on the touch screen of the puffing system and switch to the production condition interface to check whether the power supply of the equipment is normal; Whether the expanded raw material has entered the warehouse to be expanded.
(2) Clean the expansion host, add steam to the expansion chamber (about 5 minutes), soften the material in the expansion chamber; convert the production mode to the test (TEST) state, start the oil pump motor (you must start before starting the expansion host) Oil pump motor), start the expansion host and add water to the expansion chamber for cleaning. The water at the front end of the expansion chamber is clear and ok. Note: It is best not to wash the machine for more than 2 minutes, and repeat the washing several times.
(3) Install the template and adjust the cutter, install the selected template on the extruder, and match the required cutter (select the number of cutters according to the size of the die hole, the number of revolutions of the cutter should be about 1000 rpm) On the cutter holder, move the cutter device to match the guide rail on the puffing chamber, lock the cutter device, adjust the gap between the cutter and the template, and attach the cutter to the template and the blade has a slight deformation (representation) It is completely fit).
Boot:
(1) Convert the production mode to automatic (AUTO), set the feeding frequency (such as 12HZ), put the feed into the bypass state to discharge the material to the outside of the machine (do not enter the expansion chamber), press the start (Start) ), the system will be in order (with time): open the pneumatic gate between the puffed warehouse and the active silo, feed the movable bin, when the material reaches the set weight limit (can be set in the parameter setting interface, if The weight of the material in the silo has reached the set upper limit. This step will skip) and then turn on the conditioner → feeding auger → active silo breaking archer. When the feeding auger starts, you need to manually switch the puffing system touch screen to Tempering the interface and adding steam to the conditioner, starting the water pump to open the four water filling valves on the conditioner; in the manual state (MANU button is red), you need to set the CV value (such as 50%), in the automatic state (MANU) The key is set to green (the green key) needs to set the SP value (such as 18%).
(2) After the material of the conditioner is tempered, the system interface is switched to the production condition, and the puffed oil pump motor is started (the system will have a start alarm when starting the pump motor, this alarm is to remind the operator), and the cutter motor is started. And set the number of cutter rotation, start the expansion host and add water to the host cavity. After the host starts to complete (the host no-load current is about 120A), the bypass is switched to make the material enter the expansion chamber and the water of the expansion chamber is turned off. Observe the host current. If the host current exceeds the set upper limit (the current upper limit can be set in the parameter setting interface, the setting is generally 95%). The system will automatically switch to the bypass state to discharge the material out of the machine, and the current will drop to the upper limit. After the value is below, the bypass will automatically drive the material into the expansion chamber. If the host current does not fall within the upper limit within a certain period of time (20 seconds), the system will automatically shut down the host from the perspective of protecting the main motor.
(3) After the material is out of the puffing machine, the length and the puffing effect of the material are sampled. If the material is too long, the rotation speed of the cutter is accelerated, otherwise the rotation speed is decreased; after the material meets the requirements, the material is discharged into the next process. If the production of floating material and the expansion effect is not ideal, you can add 2 to 3% of steam into the expansion chamber; if the production is a sinking material and some floating material (take the sample into the water to see if there is floating material) ) It may be considered to add a part of water to the puffing chamber to reduce the water of the conditioner.
(4) At any time during the production process, pay attention to the current of the main engine, the unloading of the active silo, whether the water and steam are normal (whether the water vapor pressure is stable). The blanking of the movable silo is to open the pneumatic gate according to the upper and lower limits of the material weight setting. When the material weight drops to the set lower limit, the pneumatic gate opens, and when the material weight reaches the upper limit, the pneumatic gate closes. If the air lock opening time is too long after the lower limit (100 seconds, can be set) and the upper limit weight system is not reached, there will be a shortage alarm. When increasing or decreasing the output (feeding frequency), the water or steam requires the operator to adjust the opening (CV) of the regulating valve in the manual state. In the automatic state, the system will automatically adjust according to the change in output.
Shutdown:
(1) Automatic shutdown: When the air gate opening time on the active silo exceeds the feed setting time (can be set), the system will have a material shortage alarm, the air brake is closed, and the system starts when the material weight drops to the set lower limit. When the time is counted (can be set), after the time is up, the system will automatically stop in sequence: active silo breaking archer → feeding auger → steam valve → bypass → conditioner (adding to the main cavity before opening the bypass) A small amount of water), after the current of the main unit to be puffed drops to the no-load current, manually close the puffing main engine, the oil pump and the cutter motor, push the cutter holder away and remove the template to clean the main machine: refer to the start-up preparation (2).
(2) Manual stop: If you need to stop during the production process, press the Stop button, the system will enter the shutdown program, and the pneumatic gate above the active silo will be closed. When the material in the active silo reaches the lower limit weight, it will start to count down. After the time is up, the system will stop in sequence: active silo breaking archer - feeding auger - steam valve - bypass - conditioner (add a small amount of water to the main cavity before opening the bypass), to be puffed host After the current is reduced to the empty current, manually close the expansion host, the oil pump and the cutter motor, push the cutter holder away and remove the template to clean the host: Refer to the startup preparation (2).
(3) Emergency stop: If there is an accident in the operation of the equipment, an emergency stop is required, then the bypass can be opened and water is added to the main cavity, and the material of the expansion chamber is finished (about 10 seconds) and then pressed on the control panel. The red button can be stopped, the template is removed and the host is cleaned in time: Refer to Boot Preparation (2).
Note:
1. Calculation of template: N=Q*F/A, where N represents the number of die holes required; Q represents the preset yield (t/h) F represents the desired area of ​​the product (mm2/t/h); Indicates the area of ​​a die hole (πR2, mm2); R represents the die hole radius;
2. Floating material: starch ≥ 20%, the temperature of the material before the mold is 135 ~ 138 ° C, water 25-27%; volume after extrusion is 320 ~ 440Kg / m3, water 21 ~ 24%;
3. Wetting material: starch ≥10%, the temperature of the material before the mold is 120～135°C, the water content is 27-30%; the volume mass after extrusion is 450～550Kg/m3, the water content is 25～27%
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