Solution of drawing phenomenon in dispensing process of automatic dispensing machine

Due to the needs of the process, some products must use high viscosity glue. In the dispensing process of the automatic dispensing machine, due to the high viscosity, it is particularly easy to produce wire drawing, resulting in poor fluidity, serious wire drawing, and affecting the appearance. So how to solve this problem? Let's take a look.

If the company is very strict about product quality, it can be considered from the perspective of hardware. Pipeline valves are equipped with special valves for high viscosity fluids, such as inlet screw valves. The viscosity value of the glue is provided to the manufacturer, who can help you provide the type of viscosity value to achieve the best dispensing effect. Of course, for high viscosity screw valves, the price is relatively expensive, but it can help you solve the drawing problem.

In the various operations of the automatic dispensing machine, it can be reduced or solved by the following methods:

1, open the glue delay

When the rubber head is opened, there is no glue between the rubber outlet and the valve. If there is no glue between the distances, the rubber outlet opens and the movement will begin immediately, which will lead to a short rest. Problems with the amount of glue formed by the glue may lead to wire drawing. In order to prevent this, after opening the glue, it will be delayed for a period of time, waiting for the glue to flow out, and then carry out the subsequent distribution action.

2, glue delay

After the rubber head is closed, there is still no rubber flow between the rubber mouth and the rubber valve. If the glue head is moved immediately after it is closed, glue trails and wire drawing may occur. To prevent this from happening, after the glue head is closed, wait for a period of time for the glue to flow, and then perform the subsequent distribution operation.

3. Drawing height

Due to the high viscosity of some glues (such as yellow glue, hot melt glue), the glue can be pulled out at a constant speed and will not destroy the glue track.

4, lift height

After the track is completed, after moving to the starting point of the next track, in order to prevent the rubber head firing pin, the glue is not beautiful, and even can not pull the pole. At the end, raise the glue head to a certain height to ensure that the glue head is secure and does not touch the needle, then move to the beginning of the next track.

5. Close the glue in advance

In continuous track glue applications, the rubber head is closed before reaching the end point. The remaining track is completed with residual pressure and residual glue to stop the end of the pile and stretch.

6. End the action

After the entire teaching track is assigned, in order to facilitate the taking and placing of the workpiece, improve the processing efficiency or eliminate the processing error, the rubber head can be moved to the specified position, or the starting point to process the file, or the end point of the processing file, or reset, or the gear connection can also reduce the drawing problem caused by the processing error.

7. Tilt upward and lift

Due to the viscosity of the glue, the direct drawing action after the glue is closed cannot reach the effect of breaking the glue line, or the shape of the glue line does not meet the requirements. Therefore, after the glue head is closed, it is inclined to prepare for stretching, which can prevent stretching.

8, glue heating

Dispenser manufacturers remind that you can try to heat the glue to the right temperature, increase the fluidity of the glue, and solve the drawing problem in a certain sense. Be careful not to heat too much.