Automatic dispensers are mostly used in the fields of electronic components, semiconductor and LCD manufacturing. The principle of the dispenser is to press the glue into the feed tube connected to the piston through compressed air. When the piston is up, the piston chamber is filled with glue, and when the piston is pushed down, the glue will be discharged from the point. The plastic head is pressed out. The automatic dispensing machine is suitable for the dispensing needs in high-tech industrial automation production lines.
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　　 Working principle of automatic dispenser
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Compressed air is sent into the plastic bottle (syringe), and the rubber is pressed into the feed tube connected to the piston chamber. When the piston is on the upstroke, the piston chamber is filled with glue. When the piston pushes down the dispensing needle, the glue from The needle tip is pressed out. The amount of glue dripped out is determined by the distance of the piston down, which can be adjusted manually or controlled in the software.
Archimedes type glue pump
1. Working principle: Compressed air is sent into the glue bottle (syringe), the glue is pressed into the feed tube, and the glue flows through the screw rotating at a fixed time and a specific speed. The rotation of the screw forms a shearing force on the glue, which causes the glue to flow down the thread, and the rotation of the screw continuously pressurizes the glue to make it flow out from the dispensing needle.
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2. Features: It has the flexibility of no fixed limit to the diameter of the glue point. Can be adjusted by software. However, when a large dot is dropped, the screw rotation time is long, which will reduce the output of the entire machine. In addition, the viscosity and flow characteristics of the glue will affect its stability.
Non-contact Epoxy Pump
1. Working principle: Compressed air is fed into a rubber bottle (syringe), and the rubber is pressed into the feed tube connected to the piston chamber, where it is heated and the temperature is controlled to achieve the best consistent viscosity. Using a ball seat structure, the glue fills the gap left by the ball retracting from the seat. When the ball comes back, due to the force generated by the acceleration, the glue flow is interrupted, so that it is ejected from the dispensing needle and drops onto the board to form a glue dot.
2. Features: ( 1) Eliminates the glue dot tailing caused by traditional methods. (2) There is no problem of wear of the dispensing head and interference with other parts. (3) No needle tip is damaged. (4) There is no scrap due to substrate bending and damage by the needle.
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Application range of automatic dispenser
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1. Suitable for fluid dispensing, such as: UV glue, AB glue, EPOXY (black glue), white glue, EMI conductive glue, SILICON, epoxy resin, instant glue, silver glue, red glue, solder paste, heat dissipation paste, Solder paste, transparent paint, screw fixing agent, etc.
2. Suitable for: mobile phones, computer shells, CD players, printers, ink clips, PC boards, LCD, LED, DVD, digital cameras, switches, connectors, relays, radiators, semiconductors and other electronic industries, or with SMT equipment connection fast point / glue, clock, toy industry, medical equipment and other liquid dispensing products.
The above is the content about the working principle and application scope of the automatic dispenser for friends. The design of automatic dispensers on the market are relatively user-friendly, easy to understand and easy to operate, and simplify some complicated operation steps. Production staff only need to understand how to start the machine and set some parameters.
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