Generally, this type of filling machine controls the filling volume of laundry detergent through metering devices. It can be volumetric metering (such as piston metering). Through the reciprocating motion of the piston, the laundry detergent with an accurate volume is pushed into the self-standing bags. It can also be weighing metering. By using high-precision weighing sensors, the filling stops when the preset weight of the laundry detergent is reached.
Then, the self-standing bags are transported to the position below the filling nozzle through conveyor belts or robotic arms. The filling nozzle descends and injects the laundry detergent into the bags. During the filling process, in order to avoid the spillage of the laundry detergent, some filling machines are also equipped with anti-drip devices. For example, with a special design of the filling nozzle, the liquid can be quickly cut off after filling, and the remaining laundry detergent can be sucked back.
It includes a large storage tank for laundry detergent, which is usually made of stainless steel to prevent chemical reactions between the laundry detergent and the tank body. The capacity of the storage tank varies depending on the production scale of the filling machine. Some can store several hundred liters, and some can even reach several thousand liters.
The storage tank will also be equipped with a liquid level gauge to monitor the liquid level height of the laundry detergent in real time, facilitating the timely replenishment of the laundry detergent. Meanwhile, there are also filtering devices to remove impurities in the laundry detergent and ensure the quality of the filled laundry detergent.
The core component is the filling nozzle, and the number may be one or more. The material of the filling nozzle is generally corrosion-resistant plastic or stainless steel. Its internal structure is fine and can accurately control the flow rate of the laundry detergent.
Connected to the filling nozzle is the pipeline system. The pipeline should ensure that the laundry detergent can be smoothly transported from the storage tank to the filling nozzle, and the material of the pipeline also needs to be resistant to the corrosion of the laundry detergent.
After the filling is completed, the self-standing bags need to be sealed. Common sealing methods include heat sealing and ultrasonic sealing. Heat sealing is to heat the sealing strip to make the plastic at the opening of the self-standing bag melt and bond together. Ultrasonic sealing uses high-frequency vibration to make the plastic molecules rub against each other to generate heat, thus achieving sealing.
The sealing system also includes a pressure adjustment device to ensure the strength and tightness of the seal and prevent the leakage of the laundry detergent.
Most modern filling machines for self-standing bags of laundry detergent adopt PLC (Programmable Logic Controller) control systems. Operators can set parameters such as filling volume, filling speed, and sealing temperature through the touch screen interface.
The control system also has the functions of fault diagnosis and alarm. For example, when the liquid level of the laundry detergent is too low, the filling volume is inaccurate, or the sealing fails, it can promptly issue an alarm and display the fault information, facilitating maintenance personnel to quickly locate and solve the problem.
Low-speed Filling Machine: Generally, it fills about 1 - 10 bags per minute and is suitable for small-batch production in small enterprises or laboratories. This type of filling machine has a relatively simple structure and a lower price.
Medium-speed Filling Machine: The filling speed is 10 - 30 bags per minute, which is suitable for the production scale of medium-sized enterprises and achieves a good balance between cost performance and production efficiency.
High-speed Filling Machine: It fills more than 30 bags per minute. Large laundry detergent production enterprises usually adopt this type of filling machine, which can meet the production needs of large-scale and high-efficiency, but the price is relatively high, and it also has relatively high requirements for supporting facilities such as factory space and electricity.
Semi-automatic Filling Machine: It requires manual assistance to complete some operations, such as placing the self-standing bags at the filling position and sorting the bags after sealing. This type of filling machine has a lower cost and is suitable for enterprises with limited funds and a small production scale.
Fully Automatic Filling Machine: From the transportation of self-standing bags, filling, sealing to the output of finished products, all are completed automatically, greatly improving production efficiency and reducing labor costs. However, the equipment price and maintenance cost are relatively high.
It is necessary to ensure that the filling machine can accurately fill according to the set amount. The filling accuracy is usually expressed by the error range. For example, for a filling volume of 500 ml of laundry detergent, a good filling machine can control the error within ±1%.
Self-standing bags of different brands and models vary in shape, size, and material. When purchasing a filling machine, it is necessary to ensure that it can adapt to the self-standing bags used by your own enterprise, including parameters such as the opening size, height, and width of the bags.
Production efficiency is directly related to the economic benefits of an enterprise. It is necessary to choose a filling machine with an appropriate filling speed according to your own production scale and market demand. Meanwhile, the stability of the equipment is also very important. Factors such as the failure rate and service life of the filling machine should be investigated.
Due to the viscosity of the laundry detergent, the filling machine needs to be cleaned after being used for a period of time. Choosing a filling machine that is easy to disassemble and clean can facilitate the daily maintenance of the enterprise and ensure the hygiene and performance of the equipment.
