How to Regulate Puffing Degree in Twin-Screw Pet Pellet Making Machines？

Problem 1: Insufficient expansion of twin screw pet feed extruder, resulting in excessively high particle compaction. This type of problem is common in the production of sinking materials, and the main causes are fourfold: First, the screw speed is too low, resulting in insufficient shear strength and incomplete gelatinization of the raw material; second, the amount of steam added is too small, and the temperature and pressure in the extrusion chamber do not meet the standards; third, the moisture content of the raw material is too high, reducing the extrusion pressure; fourth, the die orifice diameter is too large, resulting in a slow pressure release rate. Solutions: Adjust the core parameters accordingly, appropriately increasing the screw speed (e.g., from 250 r/min to 280 r/min), increasing the amount of steam added (e.g., from 0.5% to 1.2%), and ensuring that the extrusion chamber temperature reaches above 140℃; test the moisture content of the raw material and control it to 12%-13% through drying; if the die orifice diameter is too large, replace it with a smaller diameter die (e.g., from 5mm to 4mm). For example, a fish farm producing sinking feed for grass carp encountered problems with an expansion degree of only 25% and excessively hard pellets. By increasing the screw speed to 290 rpm, increasing the steam addition to 1.5%, and drying the raw material moisture to 12.5%, the expansion degree increased to 38%, and the pellet quality met the standards.

Problem Two: Over-expansion by Twin Screw Pet Food Extruders results in brittle pellets with poor water resistance. This type of problem often occurs in the production of floating feeds. Causes include: excessively high screw speed leading to excessive shearing and heat generation; excessive steam addition resulting in excessively high raw material moisture content; excessively small die orifice diameter leading to excessively rapid pressure release; and excessively high starch content in the raw material. Solutions: Reduce screw speed (e.g., from 380 rpm to 350 rpm), reduce steam addition (e.g., from 2.5% to 1.8%), and control raw material moisture content to around 12%; replace with a larger diameter die (e.g., from 2 mm to 2.5 mm); adjust the formula, reducing starch content (e.g., from 45% to 38%) and increasing the amount of oil (from 3% to 5%) to reduce extrusion force. For example, when a feed mill was producing sea bass floating feed, the extrusion degree reached 98%, and the pellets were easily broken. By reducing the screw speed to 340 rpm, the steam addition to 1.6%, and replacing the die with a 2.5 mm one, the extrusion degree stabilized at 88%, and the pellet water resistance improved to over 8 hours.

Problem 3: The extrusion degree of the Twin-Screw fish feed extruder machine fluctuates too much, resulting in inconsistent batch quality. These types of problems are the core obstacles to precise adjustment, and their main causes include: unstable raw material characteristics (large differences in moisture and particle size); wear and tear on equipment components (wear on the screw threads and extrusion chamber bushings); untimely parameter adjustment; and fluctuations in steam pressure. Solutions include: establishing a standardized raw material pretreatment process to unify raw material moisture content (error ±0.5%) and particle size (80-100 mesh); regularly inspecting equipment components and replacing worn screws and bushings (replace worn parts exceeding 2mm); installing online monitoring devices to provide real-time feedback on puffing degree and automatically adjust parameters; and installing steam pressure stabilization equipment to ensure stable steam pressure at 0.3-0.5MPa. For example, a small feed mill producing carp feed experienced puffing degree fluctuations of ±10%. By implementing standardized raw material pretreatment, replacing worn screws, and installing a steam pressure stabilizer, the puffing degree fluctuation was controlled within ±3%, significantly improving batch quality consistency.

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 Twin screw fish feed extruder 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.

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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