What is SMT?(十一) -- SMD red glue: Printing methods
author: Hellen
2022-09-28
1) Printing method:Stencil engraved holes to be decided according to the type of parts, the properties of the substrate, its thickness and the size and shape of the hole. The advantage is that it is fast and efficient.
2) Dispensing method: Dispensing is the use of compressed air, the red glue through the special dispensing head to the substrate, the size of the glue dot, how much, by the time, pressure tube diameter and other parameters to control, dispensing machine has a flexible function. For different parts, we can use different dispensing head, set the number of red glue to change, but also to change the shape and number of glue dots to achieve the effect, the advantage is convenient, flexible, stable. The disadvantage is that it is easy to have drawing and bubble, etc. We can adjust the operation parameters, speed, time, air pressure and temperature to minimize these disadvantages.
3) Needle turn method, is a special needle film, dipped into the shallow glue tray each needle has a glue point, when the glue point touches the substrate, it will be detached from the needle, the amount of glue can be changed by the shape and diameter of the needle size. Curing temperature 100℃ 120℃ 150℃ Curing time 5 minutes 150 seconds 60 seconds Typical curing conditions: Points to note:
1, the higher the curing temperature as well as the longer the curing time, the stronger the bonding strength.
2、Since the temperature of the SMD adhesive will vary with the size of the substrate parts and the placement position, we suggest to find out the most suitable curing conditions. Red glue storage: at room temperature can be stored for 7 days, in less than 5 ℃ storage greater than a 6 months, in 5 ~ 25 ℃ can be stored for more than 30 days.
As SMT patch red glue by the temperature with its own viscosity, fluidity, wetting and other characteristics, so SMT patch red glue to have certain conditions of use and patch red glue standardized management.
1) red glue to have a specific flow number, according to the number of incoming materials, date, type to number.
2) The red glue should be kept in the refrigerator at 2~8℃ to prevent the temperature change and affect the characteristics.
3) The red glue is required to be reheated at room temperature for 4 hours and used in the order of first in, first out.
4) For the dispensing operation, the red glue of the hose should be defoamed, for the one-time unused red glue should be put back to the refrigerator for storage, and the old glue and the new glue should not be mixed.
5) To accurately fill in the record sheet of temperature return, temperature return and temperature return time, users need to confirm the completion of temperature return before use. Usually, the red glue should not be used out of date.
2) Dispensing method: Dispensing is the use of compressed air, the red glue through the special dispensing head to the substrate, the size of the glue dot, how much, by the time, pressure tube diameter and other parameters to control, dispensing machine has a flexible function. For different parts, we can use different dispensing head, set the number of red glue to change, but also to change the shape and number of glue dots to achieve the effect, the advantage is convenient, flexible, stable. The disadvantage is that it is easy to have drawing and bubble, etc. We can adjust the operation parameters, speed, time, air pressure and temperature to minimize these disadvantages.
3) Needle turn method, is a special needle film, dipped into the shallow glue tray each needle has a glue point, when the glue point touches the substrate, it will be detached from the needle, the amount of glue can be changed by the shape and diameter of the needle size. Curing temperature 100℃ 120℃ 150℃ Curing time 5 minutes 150 seconds 60 seconds Typical curing conditions: Points to note:
1, the higher the curing temperature as well as the longer the curing time, the stronger the bonding strength.
2、Since the temperature of the SMD adhesive will vary with the size of the substrate parts and the placement position, we suggest to find out the most suitable curing conditions. Red glue storage: at room temperature can be stored for 7 days, in less than 5 ℃ storage greater than a 6 months, in 5 ~ 25 ℃ can be stored for more than 30 days.
As SMT patch red glue by the temperature with its own viscosity, fluidity, wetting and other characteristics, so SMT patch red glue to have certain conditions of use and patch red glue standardized management.
1) red glue to have a specific flow number, according to the number of incoming materials, date, type to number.
2) The red glue should be kept in the refrigerator at 2~8℃ to prevent the temperature change and affect the characteristics.
3) The red glue is required to be reheated at room temperature for 4 hours and used in the order of first in, first out.
4) For the dispensing operation, the red glue of the hose should be defoamed, for the one-time unused red glue should be put back to the refrigerator for storage, and the old glue and the new glue should not be mixed.
5) To accurately fill in the record sheet of temperature return, temperature return and temperature return time, users need to confirm the completion of temperature return before use. Usually, the red glue should not be used out of date.
What is SMT?(十二) -- Assembly process -- Soldering material
What is SMT?(十) -- SMD red glue: Basic knowledge
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