> What are the differences between glue dispensing machines and dotting machines?

What are the differences between glue dispensing machines and dotting machines?

2024-05-29

In industrial manufacturing, there are automatic machines such as glue dispensing machines, gluing machines, and dotting machines that are specialized in controlling fluids and dispensing and coating fluids on the surface or inside of products. So, what are the differences between glue dispensing machines and dotting machines?

 

The glue dispensing machine, also known as the AB glue dispensing machine, is an automatic machine that is specialized in controlling fluids and dispensing, coating, and encapsulating liquids on the surface or inside of products to achieve functions such as sealing, fixing, and waterproofing. Generally, two-component glues are mostly used. The dotting machine, also known as the gluing machine, glue dropping machine, and glue dispensing machine, is specialized in controlling fluids. It is an automatic machine that dispenses and coats fluids on the product surface or inside the product. It can achieve three-dimensional and four-dimensional path dispensing, precise positioning, accurate glue control, without wire drawing, glue leakage, or glue dropping.

 

The most straightforward differences between glue dispensing machines and dotting machines are:

 

Glue dispensing is mainly for products with a large amount of glue application and a large gluing area, while dotting is more for fine products in small parts.

 

The specific differences are as follows:

 

  1. Different glue control methods: Most of the dotting machines on the market currently mainly control the glue output by air pressure. Of course, there are also those that do not use air pressure control. The glue dispensing machine mainly controls the glue output by a metering pump, and adjusts the glue output by adjusting the rotation speed of the pump. Currently, the main metering pumps on the market include gear pumps (mainly used for glues without fillers), screw pumps (mainly used for glues with micro-fillers), and plunger pumps (with super wear resistance). Therefore, when choosing a glue dispensing machine, everyone should consider what kind of pump is most suitable according to their own products and the properties of the glue used. Huakong Glue Injection will recommend cost-effective equipment for customers according to their actual requirements.

  2. Different glue output amounts: Relatively speaking, the minimum glue output of the glue dispensing machine is larger than that of the dotting machine. Moreover, the maximum glue output of the glue dispensing machine can reach more than ten to more than twenty grams per second, while the glue output of the dotting machine is relatively small. The minimum glue output of some dotting machines can reach 0.001g.

  3. Different dispensing accuracies: Relatively speaking, the dispensing accuracy of the glue dispensing machine is higher than that of the dotting machine.

  4. Different applicable glues: Generally speaking, the glue dispensing machine is mainly suitable for two-component AB glues such as silicone rubber, epoxy resin, crystal glue, polyurethane, and other two-component glues. The dotting machine is mainly suitable for single-component glues, such as UV glue, EPOXY (black glue), white glue, EMI conductive glue, instant glue, silver glue, red glue, solder paste, heat dissipation paste, anti-solder paste, transparent paint, screw fixing agent, etc. Of course, in recent years, due to technological progress, dotting machines are no longer limited to single-component glues. Currently, many dotting machines can also be used for two-component glues.

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