Extrusion Blow Molding Parison - Leshan

1.How long does it usually take to troubleshoot extrusion blow molding parison?

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The time it takes to troubleshoot a blow molding machine can vary depending on the specific issue and the experience of the technician. In some cases, it may only take a few minutes to identify and fix the problem, while in more complex cases it may take several hours or even days to fully troubleshoot and resolve the issue. It is important to thoroughly diagnose and address any problems with the machine to ensure it is functioning properly and producing high-quality products.

2.Why does the temperature of the barrel exceed the set value when the extruder blow molding machine is working fully automatically?

Extrusion requires accurate control of the temperature of each area. The heat comes from the heating element on the one hand, and the internal shear heat on the other. So, you want to check whether the fan is broken, or the screw does not adapt to the plastic you choose, need to change the plastic or need to change the screw.You can also ask questions on Leshan's website, and their technicians can respond to your questions.

3.Does a plastic blow dryer make PETG or Triton bottles?

Yes, the plastic blow molding machine of Leshan can make PETG and Triton bottles, and their blow molding machine can also make quadruple die heads.

4.What is the noise level of the extrusion blow molding parison?

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The noise level of a blow molding machine can vary depending on the specific machine and its operating conditions. However, on average, blow molding machines can produce noise levels between 80-100 decibels (dB). This is considered to be a high level of noise and can potentially cause hearing damage if proper precautions are not taken. It is important for operators and workers to wear appropriate hearing protection when working with blow molding machines.

5.How do extrusion blow molding parison manufacturers control variables like temperature, pressure, and blow time in the blow molding process to ensure consistent product quality?

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1. Temperature Control: Blow molding machines have heating elements that are used to heat the plastic material to a specific temperature before it is blown into the mold. The temperature is controlled by sensors and thermostats that monitor and adjust the temperature as needed. This ensures that the plastic material is at the optimal temperature for the blow molding process, which helps to produce consistent product quality.
2. Pressure Control: The pressure in the blow molding process is controlled by the air pressure in the mold. The blow molding machine has a pressure regulator that controls the amount of air that is blown into the mold. This pressure is monitored and adjusted to ensure that it is consistent throughout the molding process. This helps to ensure that the plastic material is evenly distributed and that the final product has consistent wall thickness.
3. Blow Time Control: The blow time refers to the amount of time that the air is blown into the mold to inflate the plastic material. This is a critical variable in the blow molding process as it determines the final shape and size of the product. Blow molding machines have timers that control the duration of the blow time, and these can be adjusted to ensure consistent product quality.
4. Process Monitoring: Blow molding machine manufacturers also use advanced process monitoring systems to track and control the variables in the blow molding process. These systems use sensors and software to monitor and adjust the temperature, pressure, and blow time in real-time. This helps to ensure that any variations in these variables are immediately detected and corrected, resulting in consistent product quality.
5. Quality Control: In addition to controlling the variables during the blow molding process, manufacturers also have quality control measures in place to ensure consistent product quality. This includes regular testing and inspection of the final products to check for any defects or variations. Any issues are identified and addressed to maintain the desired level of product quality.

6.What materials can be used to manufacture extrusion blow molding parison?

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1. Steel: The main structural material used in blow molding machines is steel, which provides strength and durability to the machine.
2. Aluminum: Some parts of the machine, such as the extruder, may be made from aluminum due to its lightweight and corrosion-resistant properties.
3. Plastic: The molds used in blow molding machines are typically made from plastic, such as high-density polyethylene (HDPE) or polypropylene (PP).
4. Rubber: Rubber is used for seals and gaskets in the machine to prevent leakage and ensure airtightness.
5. Brass: Brass is used for valves and fittings in the machine due to its corrosion resistance and ability to withstand high temperatures.
6. Copper: Copper is used for electrical components and wiring in the machine due to its good conductivity.
7. Stainless steel: Some parts of the machine, such as the heating elements, may be made from stainless steel due to its resistance to corrosion and high temperatures.
8. Glass: Glass is used for the viewing window on the machine, allowing operators to monitor the production process.
9. Ceramic: Ceramic is used for heating elements and insulation in the machine due to its ability to withstand high temperatures.
10. Composites: Some parts of the machine, such as the control panel, may be made from composite materials, which offer a combination of strength, durability, and lightweight properties.

7.What are the main components of a extrusion blow molding parison?

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1. Extruder: This is the main component of a blow molding machine, which melts and forms the plastic material into a parison (hollow tube).
2. Die Head: The die head is responsible for shaping the parison into the desired shape and size.
3. Clamping Unit: The clamping unit holds the mold in place and provides the necessary pressure for the blowing process.
4. Blow Pin: The blow pin is used to inflate the parison and shape it against the mold.
5. Cooling System: The cooling system helps to cool down the plastic material and solidify it into the desired shape.
6. Control System: The control system is responsible for controlling and monitoring the various parameters of the blow molding process, such as temperature, pressure, and speed.
7. Mold: The mold is the cavity into which the plastic material is blown and takes the shape of the final product.
8. Ejector: The ejector removes the finished product from the mold after the blowing process is complete.
9. Hydraulic System: The hydraulic system provides the necessary power and pressure for the various movements of the machine.
10. Electrical System: The electrical system controls the various motors and sensors of the machine.
11. Air Compressor: The air compressor supplies the compressed air needed for the blowing process.
12. Chiller: The chiller is used to cool down the extruder and other components of the machine to maintain the required temperature.
13. Conveyor System: The conveyor system moves the finished products out of the machine for further processing or packaging.

8.What is the working principle of a blow molding machine?

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The working principle of a blow molding machine involves the use of compressed air to inflate a molten plastic tube or parison inside a mold cavity. This creates a hollow shape that is then cooled and solidified to form a plastic product.
The process begins with the plastic material, usually in the form of pellets, being fed into a hopper and then melted in an extruder. The molten plastic is then forced into a long tube or parison, which is then clamped between two halves of a mold.
Next, a nozzle is inserted into the parison and compressed air is blown into it, causing the plastic to expand and take the shape of the mold cavity. The mold is cooled to solidify the plastic, and then the mold halves are separated, and the finished product is ejected.
The blow molding process can be either extrusion blow molding or injection blow molding, depending on the type of machine used. In extrusion blow molding, the parison is formed by extruding the molten plastic through a die, while in injection blow molding, the parison is formed by injecting the molten plastic into a mold cavity.
The working principle of a blow molding machine is based on the principles of thermodynamics and fluid mechanics, where the expansion of compressed air inside the parison creates pressure that forces the plastic to take the shape of the mold. This process allows for the production of hollow plastic products with complex shapes and sizes.

9.What are the precautions for operating a extrusion blow molding parison?

We operate our extrusion blow molding parison business with integrity and honesty.
1. Read the manual: Before operating the blow molding machine, it is important to thoroughly read and understand the manual provided by the manufacturer. This will help you understand the machine's capabilities, limitations, and safety precautions.
2. Wear appropriate protective gear: Always wear appropriate protective gear, such as safety glasses, gloves, and earplugs, when operating the blow molding machine. This will protect you from any potential hazards.
3. Keep the work area clean: Make sure the work area is clean and free of any debris or obstructions. This will prevent accidents and ensure smooth operation of the machine.
4. Check the machine before use: Before starting the machine, check for any loose or damaged parts. Make sure all the safety guards are in place and functioning properly.
5. Use the correct materials: Use only the materials recommended by the manufacturer for the blow molding machine. Using the wrong materials can damage the machine and pose a safety risk.
6. Follow proper loading procedures: When loading materials into the machine, make sure to follow the proper procedures outlined in the manual. This will ensure the materials are loaded correctly and prevent any accidents.
7. Do not touch moving parts: Never touch any moving parts of the machine while it is in operation. This includes the mold, extruder, and other moving components.
8. Keep hands and clothing away from the machine: Keep your hands and clothing away from the machine while it is in operation. Loose clothing or jewelry can get caught in the machine and cause serious injuries.
9. Do not leave the machine unattended: Always stay with the machine while it is in operation. If you need to leave the machine for any reason, make sure to turn it off and wait for it to come to a complete stop before leaving.
10. Shut down properly: When finished using the machine, shut it down properly following the manufacturer's instructions. This will help prevent any accidents and prolong the life of the machine.

10.Is there a limit to the size range of extrusion blow molding parison?

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Yes, there is a limit to the size range of blow molding machines. The size range of blow molding machines is typically determined by the maximum volume of the mold cavity and the maximum clamping force of the machine. The maximum volume of the mold cavity can range from a few milliliters to several liters, while the maximum clamping force can range from a few tons to several hundred tons.
Therefore, the size range of blow molding machines can vary greatly depending on the specific machine and its capabilities. Generally, blow molding machines are used to produce plastic products ranging from small bottles and containers to larger items such as automotive parts and large industrial containers.

11.Why does the blow molding machine make so much noise when it exhausts?

The exhaust valve is blocked or the exhaust valve and exhaust pipe are too small.