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The pressure adjustment in small dry dog food making machines needs to be differentiated between the needs of puppies and adult dogs. The core method uses a combination of "die diameter + screw speed" adjustment. Puppy food requires soft, easily digestible pellets, requiring lower pressure (2-3 MPa). When adjusting, a 1-2 mm small-diameter die is used, while simultaneously increasing the screw speed (from 300 rpm to 350-400 rpm for small extruders) to accelerate the feed speed, reduce the residence time in the extrusion chamber, and lower the pressure. Adult dog food requires moderate pellet hardness and strong chewability, with pressure controlled at 3-5 MPa. A 3-5 mm medium-diameter die is used, and the screw speed is reduced (250-300 rpm) to increase the extrusion time and raise the pressure. For example, when processing adult dog food for large breeds, if the pellet hardness is insufficient, the screw speed can be reduced from 300 rpm to 280 rpm, increasing the pressure from 3.5 MPa to approximately 4.2 MPa, significantly enhancing pellet hardness.
Pressure adjustment in cat food making machines is crucial for adapting to the characteristics of high-protein raw materials, employing a precise "temperature + feed rate" adjustment method. Cat food ingredients typically have a high meat content (60%-70%), and high-temperature protein denaturation can increase viscosity, leading to higher pressure. When processing regular adult cat food, the pressure should be controlled between 3.5-5.5 MPa. Initially, set the extrusion temperature to 130-150℃ to ensure sufficient but not excessive protein denaturation. If the pressure is too high, increase the feed rate (5-10%) to prevent excessive compression within the extrusion chamber. If the pressure is too low, decrease the feed rate and use a 2-4mm die. For kitten food, the pressure should be reduced to 2.5-3.5 MPa. This can be achieved by increasing the temperature to 140-150℃ to enhance raw material flowability, combined with a 2mm small-aperture die to ensure fine and soft pellets.
Pressure adjustment for functional pet foods (such as hypoallergenic and prescription foods) requires consideration of specific raw material requirements. Low-allergenic grains often use grain-free raw materials, which have poor flowability and are prone to high pressure. When adjusting, it is necessary to increase the puffing temperature (140-160℃) and reduce the screw speed to avoid excessive extrusion of raw materials. Prescription grains (such as kidney disease grains) need to have loose particles and low ash content, and the pressure should be controlled at 2-3MPa. Small-diameter die heads should be used in combination with high feeding speed to reduce the extrusion intensity of raw materials and ensure that the nutritional components of the grains are not destroyed.
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1. What is the price of the best small fish feed maker machine?
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.
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