PUR dispenser is a kind of equipment commonly used in industrial production, mainly used for precise dispensing of glue. It uses hot melt adhesive to be heated and dispensed, and due to the special properties of hot melt adhesive, the surface will solidify again when cold. To solve this problem, PUR dispensers are equipped with heaters that can heat the hot melt adhesive and make it flow for dispensing operations.
At present, PUR dispensing machine manufacturers have Hongdahui Technology. Founded in 2013, Hongdahui Technology Co., Ltd. is a high-tech enterprise that provides precision dispensing, coating, gluing, industrial dispensing equipment, auxiliary material assembly equipment, plasma cleaning equipment and other equipment in the industry.
The working principle of the PUR dispenser is mainly by heating the hot melt glue to make it appear in a flowing state, and then the glue is accurately sprayed onto the target object through devices such as dispensing valves. Specifically, the PUR dispenser consists of the following main parts: heater, glue drum, gear pump, dispensing valve, conveying pipe, temperature sensor, etc.
During operation, the PUR dispenser first heats the hot melt adhesive to the appropriate temperature through a heater to make it appear flowing. Then, the gear pump sucks the melted hot melt adhesive from the glue barrel and finally conveys the hot melt adhesive to the hot melt glue gun through the conveying pipe and dispensing valve at a certain pressure. At this time, the dispensing valve controls the ejection of the glue, so that the glue can be sprayed exactly where it is needed.
In addition, the PUR dispenser is equipped with a temperature sensor and other devices to monitor the temperature and ensure the quality of the dispensing. When the temperature of the hot melt adhesive in the PUR dispenser reaches a predetermined value, the heater will automatically stop heating and the dispensing valve will open at the same time, spraying the hot melt adhesive onto the target object. Once the hot melt adhesive has cooled, the surface will solidify again, allowing the dispensing operation to complete.
Overall, the working principle of the PUR dispenser is to heat the hot melt adhesive and dispense it accurately through pressure and temperature control, which provides the advantages of simplicity, safety and reliability for the production process.
PUR dispensing machines are widely used in a variety of industries, including but not limited to the following:
1.Paper packaging, food and beverage packaging industry: These industries usually need to be dispensed to bond or seal products in the production process, and PUR dispensing machines can efficiently carry out dispensing operations and improve production efficiency.
2.Industries such as electronic appliances, automotive interior parts, etc.: Products in these industries usually need to be glued or assembled with glue, and PUR dispensers can provide precise dispensing operations to ensure the quality and stability of products.
3.Coating composite, sheet metal, wood sheet flat lamination industry: products in these industries need to be glued or laminated during the production process, and the PUR dispensing machine can provide a large area of gluing operation to ensure the bonding quality and stability of the product.
4.Shoe outsole, sanitary napkins and other industries: these industries need to carry out glue spraying operations in the production process, and PUR dispensing machines can provide precise glue spraying control to ensure the quality and stability of products.
In addition, PUR dispensing machines are also widely used in the toy industry, leather manufacturing, electrical engineering and other manufacturing industries. Overall, any manufacturing process that requires the use of glue for bonding or sealing, can be considered for production with a PUR dispenser.
The PUR dispenser has the following advantages:
1.High-precision dispensing: The PUR dispensing machine adopts an advanced dispensing control system, which can ensure the accuracy of the dispensing position and thickness and achieve high-precision dispensing requirements.
2.High temperature resistance: PUR dispensing adhesive has high bond strength and curing speed, which can be safely used at higher temperatures to meet the high temperature bonding needs of some special industries.
3.Precise control system: The control system of the PUR dispensing machine is very precise, which can be adjusted according to the viscosity parameters of various material selections, and the glue distribution and glue ratio control can be adapted according to customer needs.
4.Highly intelligent: The PUR dispenser is equipped with highly intelligent features, including the ability to rotate and translate the robotic arm, automatically recognize the position, size, and orientation of the bonded components when handling and transferring, greatly improving their operability and reducing the error rate.
5.Safe and environmentally friendly: PUR dispensing glue is extremely safe to store, and does not contain harmful ingredients, so it will not affect the human body when used, making people feel more at ease when using.
In general, PUR dispensing machines have the advantages of high precision, high temperature resistance, precise control, high intelligence, safety and environmental protection, and are widely used in various manufacturing industries.
The operation and commissioning steps of the PUR dispenser are as follows:
Steps:1Connect the power cord of the automatic PUR dispenser to the three-phase power supply, and pay attention to the live wire, neutral wire, and ground wire when wiring, and do not connect it wrongly.
2.Turn on the power and air supply, after the touch screen is turned on, click to enter the temperature setting page, set the working temperature value, then switch to the heating page, turn on the heating function to heat the pressure plate, throat, and glue gun temperature to the set temperature.
3.After the temperature of the pressure plate rises to the working temperature, click the touch screen to switch to the pressure plate lifting page, so that the pressure plate is lifted, put into the plastic bucket, and lock the bucket hoop.
4.Apply high-temperature lubricating oil on the inner wall of the pressure plate sealing ring and the inlet of the plastic drum to facilitate the friction lubrication between the pressure plate and the rubber barrel.
5.Open the drain valve, press and hold the drop button of the touch screen to lower the pressure plate, align the mouth of the rubber barrel until the pressure plate enters the rubber barrel and presses the glue, click the pressing button, so that the pressure plate is always in the downward pressure state, when the glue flows out of the drain valve, and after the glue containing bubbles flows out, close the draining valve, which means that the air in the barrel has been discharged.
6.Switch to the main page and click the pump control button to start the glue pump gluing.
Debugging steps:1Maintain the levelness of the precision dispenser platform. Playing well horizontally will avoid a series of dispensing problems such as point deviation, more glue and less glue, and overflow.
2.Adjust the height distance between the tip and the dispensing position. If the distance from the needle tip to the cup surface of the product is too high, there will be a problem of pulling glue;If the dispensing height is too low, there will be problems such as needle sticking, climbing glue, and uneven product glue volume.
3.Choose a dispensing tip based on the size of your product. The inner diameter of the needle is about half of the diameter of the dispensing dot, and choosing the right needle can ensure the quality of the dot and improve the production efficiency.
4.The setting of the dispensing time when the dispenser is programmed. The amount of dispensing machine should be half of the product spacing, so as to ensure that there is enough glue to paste the components and avoid excessive glue seepage. The amount of glue output of the high-precision automatic dispensing machine can be controlled by adjusting the glue time, and the dispensing time can also be set according to the environmental conditions (that is, the temperature of the workshop, the viscosity of the glue, the speed of dispensing, etc.), if the glue is easy to produce stringing, it is necessary to set the glue shutdown time and stop time in advance.
5.Adjust the air pressure of the applicator controller. The amount of pressure determines the amount of glue, which affects the speed and effect of dispensing. The pressure is high, and it is easy to have the problem of glue spraying and excessive glue volume, which affects the aesthetics of dispensing productsProblems such as uneven glue and glue on the spot if the pressure is too small will directly affect the product quality. Therefore, in the actual production, it is necessary to set the pressure according to the viscosity of the glue, the environment of the production workshop, and the temperature, and the temperature is too low, which will increase the viscosity of the glue and the fluidity will deteriorate, and the pressure value needs to be increased.
After following the above steps for operation and commissioning, the PUR dispenser can be put into use normally. If you have any questions, you can contact professional and technical personnel for consultation and operation.