How to Set pet pellet extrusion equipment Parameters Correctly to Guarantee Pet Food Quality？

The temperature settings for Best Dog Food Extrusion Machines must balance sterilization and nutrient retention; this is the core of extruder parameter control. In pet food production, the temperature of an extruder is typically divided into three zones: the feeding zone, the extrusion zone, and the discharge zone, requiring precise control in each zone. The feeding zone temperature needs to be controlled between 60-80℃. Its main function at this stage is to preheat the raw materials, initially softening them. Excessive temperature can cause premature gelatinization and blockage of the feed inlet. The extrusion zone is the core temperature zone and needs to be adjusted according to the characteristics of the raw materials. When producing grain-based dog food, the temperature is controlled at 130-150℃ to ensure full starch gelatinization and improve digestibility.

 

When producing high-protein dog food based on meat meal, the temperature needs to be lowered to 120-130℃ to prevent excessive protein denaturation at high temperatures, which would reduce nutritional value. The discharge zone temperature needs to be 10-20℃ lower than the extrusion zone temperature to help the material set, reduce temperature stress in the finished product, and prevent cracking after cooling. Meanwhile, temperature fluctuations must be controlled within ±5℃, which can be monitored in real time through the equipment's intelligent temperature control system. If abnormal temperatures occur, the heating power or feeding speed must be adjusted promptly.

 

Pressure parameters and temperature are interdependent, directly affecting the degree of puffing and the texture of the finished product. The extrusion pressure of a Pet Food Extrusion Machine is generally positively correlated with temperature; the higher the temperature, the stronger the fluidity of the raw material, and the higher the pressure will be. When producing crispy dog ​​food, the pressure needs to be controlled at 6-8MPa. Higher pressure allows the material to form a porous structure at the moment of discharge, resulting in a crispier texture. When producing hard dog food (such as adult dog chew food), the pressure needs to be reduced to 3-5MPa to reduce the degree of puffing and increase the hardness.

 

Pressure can be controlled by adjusting the die orifice size and screw speed-the smaller the die orifice size, the higher the pressure; the faster the screw speed, the shorter the residence time of the raw material in the extrusion chamber, and the relatively lower the pressure. During production, pressure gauges must be used for real-time monitoring. A sudden increase in pressure may indicate die blockage, requiring immediate speed reduction and cooling, die cleaning, and parameter readjustment. A sudden drop in pressure may indicate insufficient raw material moisture or feed interruption, necessitating prompt troubleshooting.

 

The screw speed setting for a small pet food pellet machine must match the raw material characteristics and production efficiency to avoid affecting product quality due to improper speed. Single-screw extruders typically operate at 100-300 rpm, while twin-screw extruders, with their stronger mixing capabilities, can achieve speeds of 300-600 rpm. Excessive speed shortens the residence time of the raw material in the extrusion chamber, resulting in insufficient heating and extrusion, leading to low starch gelatinization and a loose finished product. Insufficient speed, on the other hand, causes overheating of the raw material, resulting in a burnt taste and significant nutrient loss. When producing small-particle dog food (2-4mm in diameter), the rotation speed needs to be increased to enhance the centrifugal force of the material and ensure uniform output. When producing large-particle dog food (8-10mm in diameter), the rotation speed needs to be reduced to allow sufficient time for the material to form within the extrusion chamber. Furthermore, the rotation speed adjustment should be gradual, avoiding sudden and drastic increases or decreases to prevent increased equipment vibration or excessive load, which could shorten the equipment's lifespan.

 

The feed rate of the pet food making extruder must be coordinated with the above parameters to form a stable production loop. An excessively fast feed rate will cause material accumulation within the extrusion chamber, leading to a sudden increase in pressure and temperature, potentially causing material splashing or equipment malfunction. An excessively slow feed rate will cause the screw to idle, reducing production efficiency and generating excessive heat due to friction, resulting in localized overheating. Typically, the ratio of feed rate to screw speed should be controlled between 1:10 and 1:15 (e.g., when the screw speed is 200 r/min, the feed rate is approximately 13-20 kg/h). The specific ratio needs to be adjusted based on the moisture content and particle size of the raw material-raw materials with excessive moisture have poor flowability and require a reduced feed rate; raw materials with fine particle size have good flowability and can have a higher feed rate. It is recommended to use an automatic feeding system that uses sensors to monitor the pressure and temperature inside the extrusion chamber in real time and automatically adjusts the feed rate to ensure stable parameters.

 

 

 

 

MIKIM's fish feed pellet production lines and supporting machinery offer excellent value for money. Not only are they affordable, eliminating middlemen markups and allowing small and medium-sized enterprises (SMEs) and fish farmers to purchase complete sets of equipment at reasonable costs, but they also boast exceptional efficiency. The fully automated process, from raw material crushing and precise ingredient mixing to extrusion pelleting and maturation, is completed in one continuous flow. This results in high starch gelatinization rates and uniform pellet formation, significantly improving production efficiency and feed quality, truly achieving "low cost, high output." Choosing a MIKIM fish feed pellet production line means enjoying comprehensive pre-sales and after-sales service, including 24-hour online customer support, a one-year warranty on the entire machine, professional on-site installation, commissioning, and maintenance, and a stable supply of spare parts. Customers can buy with confidence and use with peace of mind, with both excellent value and service quality!

 

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1. What is the price of the Pet food making machine for sale?

The price ranges from approximately $1,500-$55,000

2. Do you provide maintenance services for your customers?
Yes, we offer comprehensive after-sales maintenance services to our customers.

 

If you would like to learn more about MIKIM machinery, please contact us. We offer one-stop service and welcome your inquiries!!!

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