Material Preparation, Dispensing Technology and Mixing of Resins
As a specialist in the processing of single and multi-component reactive resins, we find the optimal solution for your process. Whether potting under atmosphere or vacuum potting of demanding electronic components or even applying of thermal conductive pastes. Our adhesive dispensing technology makes it possible. See here how it works.
Material preparation and material feeding
Here it is decided whether the material is passing to the component without interruption. That's why our adhesive dispensing solutions are tested and standardized.
Reactive resins may be very different in their properties and compositions and therefore they require a special material preparation, which we offer through our material processing systems for sealant dispensing machines.
Adhesive Dispensing technology
We have the right pumping system for a wide range of requirements. Process monitoring with adhesive dispensing equipment ensures clean results.
Our selection of pumping and adhesive dispensing technology is determined by technical processing parameters such as viscosity, filler, dispensing material and dispensing output.
Adhesive Dispensing Systems
Regardless if you use resins from a specific manufacturer, we provide dynamic and static adhesive dispensing systems to fit your application.
Adhesive Dispensing Process control
To ensure process safety in your applications, our sealant dispensing systems offer continuous monitoring and control circuits.
Continuous measurements are providing analysis and statistics with adhesive dispensing systems. After their evaluation, the adhesive dispensing systems can regulate afterwards by themselves.
All you need to Know about Adhesive Dispensing Technology
An adhesive dispensing machine is a device used to apply bonding media and to mix, meter and dispense adhesives. An adhesive is a substance that bonds two or more solids together. For example; glues, resins, putties, silicones, pastes and cement. Dispensing systems come in different types, with different functionalities and configurations. They are used for bonding, potting & sealing processes and also to produce gaskets. The two main variants for dispensing systems are the manual and automated dispensers. The key components to pay attention to when using an adhesive dispensing system include; media viscosity, dispensing rate, curing time, curing temperature, metering accuracy, size of container / cavity that will be filled and the volumetric quantity that can be dispensed in one cycle. Viscosity simply refers to the thickness of the adhesive, while the cure is the mode in which the adhesive hardens.
Various types of dispensing systems
Dispensing systems are configured as follows:
- Mix, meter and dispense systems - Allows you to mix two or more materials at a given ratio before or during the dispensing cycle.
- Hot melt dispense systems - This type melts solids to form a dispensable fluid, then dispenses the liquid into / onto a part. e.g. hot glue gun
- Micro-dispensing systems – designed for dispensing extremely small amounts of liquids, e.g. one component or two component epoxies, silicones, polyurethanes and adhesives – micro dispensing allows small and extremely precise dispensing operations
Mounting Techniques for Adhesive Dispensing Systems
These include hand-held, container mounted, rotary, machine mounted and robotic.
- The hand-held dispenser is often manually operated - the operator determines the flow rate of the dispensed material, as well as the application location.
- Container mounted dispensers are set on the container where the adhesive is to be dispensed.
- Rotary systems have a rotating base where the media is precisely dispensed.
- A machine mounted dispenser is set onto a machine to dispense with a no axis movement or with manual axis movement.
- Robotic dispenser operates on a robotic mechanism that controls the application location and dispense rate. This is controlled by a CNC Machine.
Various Configurations / Options of Adhesive Dispenser Machines
There are various configurations and options of / for dispensing equipment on the market today. These include manually operated, automatically operated, intermittent dispensing with a foot control pedal or push button, continuous dispensing with foot pedal or push button, multiple dispensing points, drip control by suck back, and spray systems for conformal coating. Manual systems usually require an operator to manually power the dispenser while the automatically operated adhesive dispensers are powered automatically by a PLC or by another machine. The “suck back” is a mechanism that averts the dispensing nozzle from leaking in between calculated shots.
Manual vs. Automated Adhesive Dispensing Equipment
A manual adhesive dispensing machine is run by an operator. It gives the operator complete control over the operation. It is often employed for small production processes. Good examples of this would be; a hot glue gun, a hand held dispenser, or a cartridge gun. Manual adhesive applicators are used for smaller operations and customized or specialized applications. Compared to the automated dispenser, the manual dispensing system is less costly and easier to operate. However, these units are not as precise in the dispensing quantity and the positioning as automated dispensing units.
An automated adhesive dispensing machine runs by either air or electricity and is controlled by a PLC (programming logic controller). It is often used for large production volumes, and can increase production output and decrease part cycle time. An automated dispensing system can be utilized in practically all dispensing applications (e.g. – a slurry, spray or a liquid). Depending on the application, an automated dispensing machine can prove to be more cost effective compared to the manually operated system. This is because it uses less adhesive, less manpower, less time and needs less clean-up. However, automated adhesive applicators are more complex in terms of design and maintenance. Generally, automated dispensing units are made to handle repetitive, large-scale tasks and usually process huge amounts of customer products within a fairly short time.
In order to select proper dispensing system to use, you need to determine the best method for applying the media for your specific product. Here are a few pointers on how to find the best adhesive dispensing system for you.
Things to look out for in a Good Adhesive Dispenser Machine
Regardless of whether you are using liquid silicone, liquid epoxy, liquid polyurethane, liquid adhesive or hot melt adhesives, selecting the right kind of dispensing machine is essential to meeting your production needs. When choosing the right equipment for the application, you are able to save company resources by performing the correct research to make a fully informed decision.
The first thing to do when looking for a dispensing machine is to find a dispensing machine manufacturer that you feel comfortable working with. When you select a machine from a renowned manufacturer, you can be assured of the system’s quality. Some manufacturers have the ability to match you up with the best dispensing systems that will meet your unique needs. Simply identify a top manufacturer and let them advise you on the right adhesive equipment for your specific application needs.
- Type of Dispensing Machine
The type of equipment that is offered depends entirely on the behavioral characteristics of the epoxy, silicone, polyurethane or other adhesive when dispensed into / onto the customer’s part, the customer’s production volume and also the intended function of the material in/on the customer’s part. Here are some example questions to ponder before buying a dispensing machine: Is the production volume small, medium or large? How well does the material flow into the part? Does this process need the material heated? Does this process need the part pre-heated? Does this process need vacuum? Does this process need an elevated curing process? There are many different dispensing units on the market that are designed to serve a wide variety of purposes. Once the needs of the process are established, it is easy to select the machine that will best suit the process.
- Operating the Dispensing System
There are various dispensing machines in the market, some of them are uniquely designed for the customer’s needs and some are built to fit a wide array of customer needs. When selecting a dispensing system, select a system that fits the needs of the process, but is also easy to operate and maintain. Some complex machines may require you to hire an operator while others are simple for anyone to operate.
Quality in very important to consider when making the decision to purchase any type of equipment. High quality dispensing machine manufacturers offer their customers a warranty of approximately 1 to 3 years. In the event the machine breaks within the warranty period, your machine is fixed without cost to the owner. Therefore, when making a decision of which vendor to use when purchasing a dispensing machine, opt for a company that offers a warranty.
- Product Testing
After a machine has been purchased and before the machine is sent to the customer’s, ensure the dispensing machine that was purchased has been tested and fine-tuned before taking possession of the machine.
- Life of the Dispensing Machine
Before a dispensing machine is purchased, the life of the product being produced on the equipment must be estimated. A dispensing machine can be a rather large capital investment for a company and if the equipment is not designed to last the complete life cycle of the produced product, the cost of replacement must be taken into consideration.
- Mainenance of the Dispensing Machine
The longevity of the dispensing equipment depends on how regularly the preventative maintenance is performed on the equipment. Regular cleaning of your equipment, servicing and upgrading its dispensing technology after a certain period of time will not only lengthen the life of the machine, but will also increase productivity and ensure optimum performance of the machine. Proper maintenance of any dispensing system will save time and money in machine replacements. However, some of this preventative maintenance warnings can be performed by certain high quality machines. Some dispensing machine suppliers provide certain machine monitoring options. These options include pressure monitoring, dispensing needle position check, needle cleanliness, pump rotation speed monitoring, material vessel filling level, pot life of the material after it has been mixed, shelf life and batch number of the material before it is used in the machine by using a barcode scanner on the material preparation station, weight scale measurements to check dispensing weights before production and user level management.