Automated Glue Dispensers

What are Automated Glue Dispensers?

The automated glue dispensers are also known as the adhesive dispensing equipment or the adhesive dispensing systems. In general, an automated glue dispenser is a machine used to apply bonding materials that bring two or more components together. The adhesive dispensing systems come with a wide variety of styles. They can be referred to as the hand tools that are used for handcraft purposes such as the glue guns or the caulk guns. They can also be the console style adhesive dispensing equipment such as an automated polyvinyl resin applicator. Whether it is for a small scale use or a large scale operation, the devices used to dispense adhesives can be called the adhesive dispensing system.

The automated glue dispensers are more of the console style adhesive dispensing system that is applied in larger scale operations. This type of dispensing system is involved in various industrial settings such as automotive, material packaging, industrial assembly, medical device, electronic industries or even aerospace and military. The application of the automated glue dispenser can increase the production speed and reduce the cost in the manufacturing processes. In OEMs, the application of this automated equipment can boost the quality, consistency and speed of production and minimize the risk of human error. It can further reduce the unpredictable costs of human labor since the operation is automated and controlled by computerized unit.


Variables in dispensing adhesives

Adhesives are the substances that are used to join multiple solid components together, such as glues, pastes, resins, cement, silicones and putties. Though the manual dispensers are a good choice since they allow the full control of the user over the entire operation, there are still some applications that require power-driven automated dispensers. With the automated glue dispenser, any form of adhesives can be applied, including liquid, spray or slurry adhesives. In this type of application, variables such as the temperature, surface, or time affect the result profoundly.


Adhesive temperature

The temperature has a major impact to the harden process of the adhesives and the viscosity of it. Viscosity refers to the thickness of the adhesives and the strength of the adhesiveness to bond the parts together. If the viscosity created is not enough, the parts fall apart during the adhering process. On the other hand, if the adhesive is too viscous, it cannot pass through the automated glue dispenser easily and the adhesives cannot be dispensed at the right volume.

The viscosity is affected majorly by the temperature. The best temperature to maintain the flow of the adhesives varies based on the type of adhesive that is involved in the operation. Some adhesives need higher temperature to prevent the early hardening while some may turn into liquid and flow too easily at high temperature. Therefore, the temperature adjustment of the automated glue dispenser is critical in order to have the adhesives dispensed in the desired manner.


Substrate temperature

The substrate temperature refers to the temperature of the parts that are applied with adhesives. The adhesives could not adhere to the substrate firmly if there is a temperature mismatch between the adhesive temperature and the substrate temperature. Once the mismatch is occurred, it has to be corrected. The mismatch of the temperatures can lead to part failure, rip-off effect of the adhesives, and sometimes even fatal accident. The mismatch can be effectively avoided by the automated glue dispensing systems because the built-in ovens or heating stations are monitored and controlled by the computerized control unit so that the desired temperature can be maintained.


Air flow

The air flow is another essential part in adjusting the automated adhesive dispensing systems. The air flow actually has to do with the safety issues and the automated adhesive application by several means. Firstly, the correct air flow can aid in the adequate heating of parts to the desired temperature, the right substrate temperature. With the correct air flow, the adhesive application is more likely to be successful. Secondly, the volatile organic compounds (VOCs) are often included in industrial adhesives. These substances are harmful to humans. With the correct air flow, the air captures the VOCs and prevents the VOCs from releasing to the work areas. In addition, the air flow is needed in the spray applications.


Travel passage and orientation

The travel passage and orientation refer to the movement of the parts within the process. The way the parts go does have certain impact to the success of the automated dispensing process. There are usually index systems that control the movement of the parts through the automated glue dispensers. If the dispensers are fixed in place, it is the dial or the chain to control the movement of the parts. There are also systems that have the parts stay stationary and the dispensers attached to a robot arm with multi axes motion capability. The robotic spray dispensers are useful when the parts have complex geometries.


Overall process control

There are some attachments to the automated glue dispensers sometimes to make sure the system operates as programmed. The attachments include the sensor to monitor the temperature of adhesive material and the parts in order to reduce the chance a temperature mismatch takes place. There are also sensors to detect the flow speed of the adhesives to make sure they are dispensed at a required speed and volume. There is air pressure sensor as well as air flow sensor to control the environment inside the automated dispensing system. Last but not least, there is a monitor serves to manage the movement of the parts during the process. The success of an automated dispensing application can be assured with the collaboration of all these process control units.

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