CONTINUOUS ADDING OF COLD FAT

GENERAL DESCRIPTION

The fat adder enriches feed that requires a high percentage of fat, such as poultry feed, without compromising the compactness of the final product. The cycle starts after sieving the pellet, which makes it homogeneous, well-filled and dry, with a percentage of fat ranging from 7 to 11%

GENERAL DESCRIPTION
The fat adder enriches feed that requires a high percentage of fat, such as poultry feed, without compromising the compactness of the final product. The cycle starts after sieving the pellet, which makes it homogeneous, well-filled and dry, with a fat percentage ranging from 7 to 11%.
Some time ago, to add fat, you needed a drum machine in the shape of a double half of a cone. The pellet flowed in continuously from one end, sprayed with hot oil and exited from the other end where the screening net was. The product, however, was of poor quality, because the oil did not penetrate into the core of the pellet and, remaining on the surface, turned out to be wet and not homogeneous. To overcome this problem, the product was dried and cooled before packaging.
In latest generation fat adding machines, such as those operated by vacuum, hot fat is introduced while the pellet is being agitated by the shaft blades. At this stage, a vacuum is created inside the device. Gradual opening of the atmospheric pressure valve after an appropriate production cycle and mixing time to obtain a homogeneous product, allows the fat to penetrate directly into the core of the pellet, which results in a dry and excellent quality.
A good compromise between the cost of the product and the cost of the equipment is a device with a continuous cycle of adding cold fat. It uses 2 heated screw feeders and thanks to the very precise flow control it provides the right balance between the amount of fat and the compactness of the pellet.

PROCESS:
1. Pellet flows through the hopper;
2. Enters the extraction auger. Its speed is set by an inverter that controls the performance according to the set level on the volume sensors;
3. The flow is continuously weighed by the weighing container. This electronic device measures the force applied to an object (usually a mechanical component) by monitoring an electrical signal modified by the deformation that the force exerts on the component;
4. Grease is sprayed onto the pellets by a spray chamber connected to a 600 liter tank. The process is controlled by a dosing pump and a flow meter that sets the oil addition according to the pellet flow. Fat is mainly made from industrial animal waste (chicken fat);
5. The pellet passes through two screw feeders. The duration of the production cycle is sufficient for the oil to uniformly penetrate into the core of the pellet thanks to the rotation and the blades. heating is achieved by means of electric plates that are in contact with the outer shell of the screws (70-80 °C) of the pipes;
6. The device releases the product ready for packaging

TECHNICAL DETAILS:
Models available:
● LOP-F 10: motor 3 kW, feed screw diameter 300 mm, length 10 m. 5.5 kW capacity 10 t/h
● LOP-F 20: motor 3 kW, feed screw diameter 300 mm, length 14 m. 5.5 kW capacity 20 t/h
● LOP-F 10: motor 4 kW, feed screw diameter 350 mm, length 20 m. 7.5 kW capacity 30 t/h

The painted steel dosing system consists of:
● bunker 1.5 m3
● volume sensor: sets the flow according to the set level
● Extraction auger, variable volume with motor with built-in inverter, 3 kW.

Painted steel screw feeder consists of:
● Diameter 300 mm.
● 10 m length for LOP-F model and over 10 t/h capacity
● Predisposition to heat resistance.
● motor 5.5 kW

Notes:
     Heating the screw facilitates the absorption of fat and oil, and the screw itself is kept clean.
        For model LOP-F 20, the screw feeder is 14 m long and 300 mm in diameter.
        For model LOP-F 30, the screw feeder is 20 m long and 350 mm in diameter.

The liquid dosing system consists of:
● Liquid tank AISI 304, capacity 600l., intended for steam heating
● Valves and nozzles for liquid separation, air injection, post-process cleaning
● Positive displacement pump
● Mass volume sensor with 4-20mA. Signal proportional to product flow
● Ventilated servomotor, 1.5 kW

The spray chamber made of AISI 304 consists of:
● Grease spray nozzles
● Compressed air ports for low pressure liquid spraying 0.5 bar

— Options
Electronic control panel for liquid dosing and for system motors.

Specifications

Model	Inner diameter (mm)	total length (mm)	Output based on 4 min of retention time (T/h)	Output based on 2min of retention time (T/h)
SNF600.4500-EH	600	4500	8	15
SFN800.5000-EH	800	5000	15	30
SFN1100.5000-EH	1100	5000	30	60

Optional

WAP remote roller adjustment

The rollers are adjusted by a hydraulic piston driven by a hydraulic device located outside the machine and controlled from the control panel.

The position of the rollers is calculated by means of an angular potentiometer mounted behind the rollers (inside the main shaft). The potentiometer signals the angular position of the roller pins. By operating the entire system from the control panel, the distance between the rollers and the die can be calculated using the signal transmitted by the potentiometer.

At the electronic panel, the operator chooses the roller position. The panel pressurizes the hydraulic circuit and moves the piston until the rollers reach the desired position.

From the electrical panel, the operator determines the position of the rollers by applying pressure to the hydraulic system and moving the piston until the rollers reach the desired position. Once the desired position has been reached, the system is locked and held in position by two valves.

The maximum pressure reached by the hydraulic system is 250 bar, and the required pressure for moving the piston and adjusting the rollers is 150 bar.

The adjustment is done quite quickly: you can move the rollers closer or further away from the matrix by 7-8 mm, in each direction in about 15 seconds.

For more information, watch the following video: Automatic Rollers Adjustment (WAP System)

RAPID BLOC quick die change system

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The device allows replacing the matrix in 10-20 minutes, depending on its size. The system includes a tapered stainless steel ring that is closed and held in place by Belleville disc springs.

This ring locks the die in place. The matrix is released by pressure on the hydraulic system, which pushes the springs to release the elastic ring.

For more information, watch the following video: Rapid Block System

Hydraulic die extraction system

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The system consists of a hand pump and a piston, which are needed to dismantle the die.

The piston is installed between the rotor and the reinforcement flange so as to push the die out of its seat.

Automatic lubrication

This system includes a high viscosity grease pump.

It is equipped with blades to break up possible air bubbles. The system is connected to the press via a rotary distributor connected directly to the main shaft.

Lubrication is controlled by an electrical panel that is included in the delivery. The panel allows you to measure the required amount of grease using two timers to regulate the time for applying grease and pause.

The pump has the following characteristics:

● the flow is adjustable from 2.9 to 17 cc / min.

● motor 0.185 kW, 400V, 50Hz

● steel tank for 10 kg

● filter

● pressure relief valve

● pressure gauge

● indicator of minimum lubricant level

● progressive dispenser for distributing grease at two points

● inductive PNP sensor for cycle monitoring

● control valves for 1/8 outlet

Thermal insulation

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Thermal insulation

It is very useful in countries with cold climates or when there is a large temperature difference between day and night. Prevents condensation and crust formation in the air conditioner.

In order to improve the conditioning of flour at high temperatures, the air conditioner unit can be equipped with an external heater that uses low pressure steam to heat the diathermic oil. The system includes insulation that improves thermal efficiency and prevents condensation.

This system has significant advantages over traditional steam heating:

• has significant thermal inertia

higher temperatures can be reached

Heating the air conditioner with oil

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• uniform temperature distribution along the entire length of the machine

in a traditional steam heating system there is a risk of breakage and steam escaping from the coupling due to internal pressure

Heating the main door

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Electric heating of the main door prevents crusting

Blockage sensor for front convector

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Especially in the case of formulas containing oil, the pellet press is often subject to “wet clogging”. It occurs when the die begins to slide and throw off the product without overloading the main motor, which only detects current fluctuations. In a few seconds, complete clogging of the bale chamber and convector is obtained.

In this case, the clogging sensor signals an anomaly and allows you to stop the press without serious consequences.

Front by-pass for flour

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For some product lines, it is necessary to bypass the press by sending flour directly to the cooler. The pellet press can be equipped with a hydraulic piston controlled bypass installed in the front dispenser.

Automatic cleaning of the temperature probe

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The temperature probe gradually becomes covered with layers of damp flour, which can increase the reading time and, as a result, reactions. This affects the effectiveness of the process control system, which is based on temperature readings. The automatic probe cleaning system solves this problem. It is a mechanical device that automatically cleans the temperature probe when material starts to accumulate on it.

IFM electronic belt slip control

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This electronic device shuts off the engine when the belts begin to slip, thus preventing damage to the belts themselves.

Slow rotation of the matrix

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Detail This device is of great help in the exchange of large matrices.

Hand winch

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The hand winch is an alternative to the hydraulic lift. On request, the pellet mill can be equipped with a hand winch and special anchor hooks that facilitate the assembly and disassembly of dies and rollers.

hydraulic lifter for rollers and die

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The practical hydraulic lift is equipped with special hooks to facilitate the movement of the dies and rollers, especially during assembly and disassembly. This lifter allows you to easily and safely move dies and shells in the work area.

Lamec control system lcs 2000 FV

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The LCS FV 2000 control system is an electrical panel with Siemens PLC that controls the automation of the press through two coordinated processes.

The first process adjusts the performance of the feed auger depending on the power consumed by the main motor. In particular, the system monitors the speed of the auger and acts on the frequency converter.

The second process regulates the flow of steam admitted to the conditioner depending on the conditioning temperature of the flour when the motorized steam valve is opened or closed.

The control panel is equipped with a display and a keypad for data entry.

The system is not complicated and does not require specialized personnel.

At the same time, the motorized steam valve opens and adjusts to the desired air temperature.

In the event of an emergency, the system acts on the emergency door of the conveyor to avoid overloading: product flow and steam flow are reduced simultaneously.

As soon as there is no more risk of overloading, the auger speed is gradually restored to normal values depending on the load of the main motor, and the steam flow is brought back to normal values.

At the end of the process, the device gradually decreases the screw speed and progressively closes the steam valve.

The system includes:

• electronic control panel for lcs pv complete with PLC SIEMENS SERIES 7

• wattmeter

• CAM LOGIC level indicator

• counter

• temperature probe PT 100

• probe holder

• valves for regulating the steam flow

ON / OFF valve for steam regulation

Personalization

Our goal is to supply all our customers with pellet presses that meet their needs. For this reason, all our models can be personalized: the client can choose the position of the engine, the side of the hatch opening, the size and volume of the air conditioner, the size of the auger, the color, etc.