According to the long-term experience of customers at home and abroad and their own practice, the components that are often encountered in the use of red rubber are offset, the components are missing, the adhesion of red glue is insufficient, the strength of red glue is insufficient, the red glue is unstable, and the glue is unstable. The solutions to the problems related to the problem of not being in place, red plastic tailing, red plastic drawing, red plastic hollow or red plastic depression, red plastic leakage, red plastic nozzle blocking and red plastic are summarized as follows:
First, component offset
The reasons for component offset are:
1. Insufficient coating amount of red adhesive;
2, the placement machine has an abnormal impact;
3, red adhesive adhesive has low wet strength;
4, placed for a long time after coating;
5, the shape of the components is irregular;
6. The adhesion between the surface of the component and the adhesive is not coordinated.
Solution for component offset:
1. Adjust the amount of red adhesive coating;
2, reduce the patch speed;
3, the final placement of large components;
4. Replace the red adhesive;
5. The patch is cured within 1H after coating.
Second, component parts
The reasons for component removal are:
1. Insufficient curing strength or bubbles;
2, red glue dispensing sizing area is too small;
3, after the glue is placed for a long time to cure;
4. The area where the glue is irradiated when using UV curing is insufficient;
5. There is a release agent on the large package components.
Solution for component drop:
1. Confirm that the curing curve is correct and the moisture resistance of the red adhesive;
2, increase the coating pressure or extend the coating time;
3. Select a red adhesive with a long viscosity effective time or adjust the production cycle appropriately;
4. The patch is cured within 1H after coating.
5, increase the amount of glue or double-point application of glue, so that the area of ​​red glue glue exposure;
6. Consult the component supplier or replace the red adhesive.
Third, the red glue is insufficiently
The reasons for the lack of adhesion of red plastic are:
1. The area of ​​red plastic is too small;
2. The plastic release agent on the surface of the component is not cleaned;
Solution for insufficient adhesion of red glue:
1. Clean the release agent with solvent;
2, replace the adhesive with higher bonding strength;
3. Repeat the dispensing at the same point.
4. Adopt multi-point coating to improve the gap filling ability.
4. Insufficient strength after curing of red glue
The reasons for the lack of strength after curing the red glue are:
1. Red rubber adhesive is not fully cured;
2, the amount of red plastic adhesive coating is not enough;
3. Poor infiltration of components.
Solution for insufficient strength after curing red glue:
1. Increase the set temperature of the curing oven;
2. Replace the lamp while keeping the reflector clean without any oil stains;
3. Adjust the amount of red adhesive coating; consult the supplier.
5. The red glue is unstable and the bonding is not in place
The reason why the red plastic is unstable and the bonding is not in place is:
1. Use it immediately in the refrigerator;
2, the coating temperature is not stable;
3, low coating pressure, short time;
4. Bubbles are mixed into the syringe;
5. The pressure of the gas supply source is unstable;
6, the nozzle is blocked;
7, the board is not flat
8, the nozzle is worn;
9. The size of the glue dot does not match the inner diameter of the pinhole.
Solution for unstable red glue and insufficient bonding:
1. Use it after fully thawing;
2. Check the temperature control device;
3. Appropriate adjustment of coating pressure and time;
4. Centrifugal defoaming device is used for sub-assembly;
5, check the gas source pressure, filter Qi, seal ring;
6, cleaning the nozzle;
7. Consult the board supplier;
8, replace the nozzle;
9. Increase the size of the glue point or replace the glue nozzle with a smaller inner diameter.