Shapes melted plastic, controls pellet thickness and pressure
ប្រព័ន្ធត្រជាក់
Makes pellets hard, stops them from changing shape
ប្រព័ន្ធកាំបិតបង្វិល
Cuts cooled pellets into the same size and shape
You can change the design of these parts to fit your needs. Automation systems help you control heat and warn you about problems. Cooling and drying systems keep pellets strong and protect their quality.
Pelletizing Extruder Process
The pelletizing extruder works in steps. Each step changes raw material into pellets that look the same. You need to know every stage to getgood pellets.
Material Feeding
ទីមួយ, you put raw material into the extruder. The hopper holds the material. This material can be plastic flakes, គ្រាប់, or powders. Some common materials are polyethylene, ប៉ូលីភីលីនលីន, ABS, នីឡុង, and PLA. អ្នកអាចប្រើ feeders ពិសេសដើម្បីគ្រប់គ្រងបរិមាណសម្ភារៈចូល. ពេលខ្លះ, អ្នកត្រូវសម្ងួតសម្ភារៈជាមុនសិន. ការសម្ងួតគឺមានសារៈសំខាន់សម្រាប់ផ្លាស្ទិចដែលស្រូបយកទឹក។. ការសម្ងួតបញ្ឈប់ពពុះ និងបញ្ហាផ្សេងៗទៀតនៅក្នុងគ្រាប់.
បន្ទាប់ពីចាកចេញពីមរណៈ, the plastic is still hot and soft. The cooling system makes the pellets hard and keeps their shape. Water cooling is used a lot because it cools fast and evenly. Some machines use air cooling for plastics that melt at lower heat. Underwater cutting cools the pellets right away. This is good for plastics that melt easily.
វិធីសាស្រ្តត្រជាក់
ការពិពណ៌នា
Suitable Polymers
Water Cooling
Uses water to cool pellets fast and keep them good.
Many plastics that need even cooling.
ម៉ាស៊ីនត្រជាក់
Not as fast, used for plastics that melt at low heat.
Plastics with low melt index.
Underwater Cutting
Cuts and cools pellets in water right away.
PP nonwoven, melt-blown fabrics.
Cooling must be even. ប្រសិនបើអ្នកត្រជាក់លឿនពេកឬយឺតពេក, គ្រាប់អាចបំបែកឬផ្លាស់ប្តូររូបរាង. ភាពត្រជាក់ល្អរក្សាគ្រាប់រឹង និងមើលទៅត្រឹមត្រូវ។.
អ្នកប្រមូលគ្រាប់ដែលបានបញ្ចប់នៅចុងបញ្ចប់. ពេលខ្លះ, you need to dry them to remove water. This is where you check the pellets for size, រាង, and purity. You test the pellets and remove any bad ones. Some companies use special tests for plastics that need to be very pure.
You must follow world rules to make sure your pellets are good. Good checks mean your pellets will work well in other machines.
ព័ត៌មានជំនួយ: Check the pellets often when you collect them. This helps you find problems early and keeps your machine working well.
If you follow each step, you turn raw material into good pellets. Every stage is important for making the final product.
Factors Affecting Pelletizing
When you use a pelletizing extruder, you must control some things. These things help you get strong and even pellets. You need to watch temperature, ល្បឿនវីស, and your material’s properties. ពួកវានីមួយៗអាចផ្លាស់ប្តូររបៀបដែលគ្រាប់របស់អ្នកមើលទៅ. វាក៏ប៉ះពាល់ដល់របៀបដែលម៉ាស៊ីនរបស់អ្នកដំណើរការបានល្អផងដែរ។.
ល្បឿនរបស់វីសផ្លាស់ប្តូរល្បឿនដែលអ្នកបង្កើតគ្រាប់. ប្រសិនបើវីសលឿនពេក, គ្រាប់អាចមើលទៅមិនស្មើគ្នា. ពួកគេក៏អាចទទួលបានពពុះខ្យល់ផងដែរ។. ប្រសិនបើវីសយឺតពេក, អ្នកបង្កើតគ្រាប់តិចជាងមុន។. You need to find the best speed for your material and machine. Try different speeds and look at your pellets often. នេះជួយអ្នករក្សាគុណភាពគ្រាប់ដូចគ្នា និងបញ្ឈប់បញ្ហា.
Longs and elbows happen if the knife is too slow or the extrusion rate is high.
Internal voids and popcorn can show up if the polymer has water or cools too fast.
Dimples and dust appear if the product shrinks too fast or is brittle.
Surface or melt fracture and trash or shavings happen if the extrusion rate is high or the knife is not adjusted often.
Pellets that do not look the same can come from temperature changes or uneven die heating.
You can use tools like theIshikawa fishbone diagramor the 5 Whys technique to find out what is wrong. These tools help you list causes and look deeper into the problem.
Mechanical And Process Problems
Mechanical and process problems can also hurt pelletizing. You might see uneven output, low production, or bad pellets. នេះគឺជាបញ្ហា និងវិធីមួយចំនួនដើម្បីជួសជុលពួកគេ។:
