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Dispensing and positioning in photovoltaic silicon rod cutting

Dispensing and positioning in photovoltaic silicon rod cutting
(1) Requirements for positioning glue in silicone rod cutting. This adhesive is mainly used for fixing silicon wafer rods when cutting. It requires moderate viscosity, easy operation, easy-to-identify color, and fast curing. The bonding strength should satisfy the cutting process without degumming and deformation, and the plastic can be quickly degummed after the cutting is completed, and the performance of the adhesive is stable, the quality is reliable, and the high-quality slicing rate is not broken.
(2), the silicone rod cutting process mainly includes three steps of surface treatment and bonding, cutting and degumming.
Bonding: Firstly, the surface of the silicone rod and the bonding substrate are cleaned, and then the prepared adhesive is dispensed on the surface of the silica gel rod, and cured at room temperature for 1H.
Cutting: After the silicone rod is bonded and positioned, it is automatically cut according to the process requirements.
Degumming: After cutting, immerse the silica gel in 60 °C-80 °C hot water for 7-15min, express degumming.

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Energy power generation equipment wind energy blade bonding process

Energy power generation equipment wind energy blade bonding process
Large fan blades are mainly manufactured by assembly. The blade shells are respectively formed on two female molds. The core material and other glass fiber composite parts are respectively formed on a special mold, and then the blade shell and the core material are placed on the main mold. The upper and lower half shells are bonded to each other, and the gap of the shell is filled, and the combined mold is pressed to form an integral blade.
Wind turbine fan blade assembly process mainly includes surface treatment and dispensing, combining mold and curing:
1, Surface treatment and dispensing. First ensure that the surface of the bonding substrate is clean, then dispense, the dispensing should be even and detailed
2, Merge the mold. After dispensing evenly, the blade is clamped
3, Curing. Curing at room temperature

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Photovoltaic silicone dispensing in aluminum frame

Photovoltaic silicone dispensing in aluminum frame
Aluminum frame bonding is the largest area for PV organic silicone dispensing.
The glass, the back plate and the aluminum frame are all bonded together by silicone, without any other auxiliary mechanical connection, and require outdoor use for more than 25 years.
The PV module bonding and sealing process mainly includes two main steps of dispensing and curing.
1, Dispensing: after according to the technical requirements to choose a good sealant, for large manufacturers generally use automatic dispensing equipment. For small-scale production, there are also manual dispensing.
2, Assembly and curing: after dispensing need to be assembled immediately, and then room temperature curing. And check to maintain a beautiful appearance, can not lack glue. In short, it is necessary to ensure the intrinsic quality of the caulking

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LOCA glue construction process requirements in the assembly of the touch screen

LOCA glue construction process requirements in the assembly of the touch screen
There are more and more applications of touch screens, such as smart phones, PADs use touch screens, and more and more touch screens for notebook computers and even TV sets. At present, the touch screen market mainly has two types of resistive and capacitive. The touch screen is made up of two pieces of glass, which are glued together by liquid optical UV glue or double-sided tape. Compared with OCA tape, LOCA liquid UV glue has the advantages of stronger bonding force, flexible control of the thickness of the glue layer, better solution to the fit of the large and medium screen, reduction of light refraction, and elimination of visual phenomena such as rainbow lines. Enhance display contrast, reduce battery consumption, and more.
1, LOCA glue performance requirements, generally LOCA glue is generally soft, requires 80%

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Dental adhesives are used in the irregular teeth treatment

Dental adhesives are used in the irregular teeth treatment
In the process of aligning the teeth and returning to normal position during the correction treatment, in the past, a ring-shaped metal band was placed around the teeth for corrective treatment. When such a ring-shaped metal strip is attached, it is fixed by phosphoric acid cement. However, the cement will partially dissolve, deposit, and erode, and the annular metal strip will also damage the mouth’s comfort and beauty. It has been studied to overcome the above disadvantages by studying a new technique in which a transparent plastic bracket is directly adhered to the surface of the tooth for corrective treatment. The adhesives used were methyl methacrylate-tri-n-butyl boron-based adhesive and ethylene glycol dimethacrylate adhesive.

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Electronic components packaging and PCB board protection with glue

Electronic components packaging and PCB board protection with glue

PCB circuit board protection
1, components fixed: RTV organic silicone sealing glue; radiator connection: thermal plastic, thermal paste;
Conformal coating: silicone, UV, acrylate, polyurethane, etc. (brush, dip, spray, etc.)
Jumper fixed/coil terminal fixed: Instant dry glue, UV glue.

2, COB chip encapsulation: single-component medium temperature curing epoxy glue, manual dispensing / automatic dispenser, for electronic watches, electric toys, calculators, telephones, remote controls, PDA, etc. on the PCB chip package seal.
3, SMT patch: single component medium temperature curing epoxy glue, dispensing (semi-automatic dispensing machine and automatic dispenser) or scraping glue (pad printing)
Flip Chip Underfill: Paste: One-component medium temperature curing epoxy glue, manual dispensing/auto dispensing machine for various flip chip, data processor; conductive connection: single component epoxy conductive Silver glue.
5, bare die bonding Die Attach: single component medium temperature curing epoxy glue, instantaneous dry glue; conductive connection: single-component epoxy conductive silver plastic
6, Liquid crystal display LCD package: Sealed UV glue has a certain toughness, good adhesion, resistant to alcohol and water; pin (PIN) UV glue; conductive connection: single-component epoxy conductive silver plastic
7, light-emitting diode LED package: Potting: Epoxy, silicone, UV glue, the required transmittance of 98%; Conductive: One-component epoxy conductive silver plastic
8, Relay / switch package: Edge: UV glue; Potting: One-component glue or two-component glue.
9, DC/DC power module package: Potting: Addition type 1:1 medium temperature curing silicone rubber.

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Construction adhesive type and application site in building and decoration

Construction adhesive type and application site in building and decoration

Epoxy resin:

Mainly used in the reinforcement of building structures, mortar modification and concrete reinforcement; bridge reinforcement, and prefabricated anchoring of components.

Acrylic resin:

structural bonding, anchoring.

Silicone:

joint sealing of curtain wall and bathroom accessories; sealing between door and window frame and wall; sealing of butt joint of concrete panel in underground gallery; sealing of double-glazed glass and heat-insulating window frame; Aluminum-plastic panel curtain wall caulking seal

Polyurethanes:

Leveling of concrete slabs in buildings, sealing of vertical seams; joint seals for curtain walls and toilet accessories; roofs, floors, gap seals; joint seals in air conditioning systems; water supply and drainage, sticking at gas supply lines Sealed. The seal between the door frame and the wall; the sealing of the butt joints of the concrete panel of the underground gallery; the sealing of the laminated glass and the heat-insulating window frame; the caulking and sealing of the highway, the bridge, the expansion joint of the airfield, etc.;

Modified silane sealant:

The use is the same as organic silicone or polyurethane.

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UV glue construction methods,precautions and some tool

UV glue construction methods,precautions and some tool

UV glue construction correct use method:

1. Ensure that the bonded surface is clean, clean, dry, free of grease, and flat.

2. Apply a suitable amount of UV shadowless glue on the surface of the adhered workpiece, then close it with another adhered workpiece and discharge possible air bubbles.

3, two sticky workpieces in the compact state, through a certain intensity of UV light or sunlight, so that the adhesive surface UV glue curing.

UV glue construction precautions:

1. The grease, moisture, impurities and flatness on the surface of the adhered workpiece will directly affect the bonding quality. Be sure to wipe dry and clean it to ensure that the bonding surface is flat.

2, rainy weather operation, be sure to ensure that the bonded workpiece is clean and dry, it is strongly recommended that the use of special glueless curing light for light curing, to ensure the quality of bonding.

3, in the bonding process, be sure to discharge possible bubbles; light curing process, to ensure that the sticky parts can be irradiated by UV lamp or sunlight, be sure to press the sticky workpiece, the thinner the adhesive layer, the more adhesive force it is good.

4. Before sticking the workpiece, do not move it under the UV lamp or sunshine to avoid whitening and affect the appearance. It is recommended to use the fixture.

5. The amount of UV radiation is very important for the curing of the UV adhesive, which is determined by the light intensity and the irradiation time. For UV shadowless adhesives, the use of special plastic curing light, the positioning time is usually within seconds, fully cured about 30 seconds or so; the use of sunlight exposure conditions, depending on the sunshine conditions, positioning time is usually within tens of seconds Full cure will require sufficient time.

6, for the remaining plastic affect the appearance of the product, you can accurately control the amount of glue to solve, or wipe the excess glue before light curing and then light curing.

7. Colored or thick glass will absorb ultraviolet or visible light, so that some of the band’s light can not pass through or be weakened, and affect the curing of UV shadowless glue, special glue (such as UV169) should be selected or confirmed through experiments. glue.

8. The service life of the UV lamp is usually 800-1000 hours. The intensity of the emitted UV light will become weaker and weaker as the use time increases. The new lamp should be replaced regularly.

9. UV shadowless adhesive belongs to industrial chemicals. Before curing with glue, please make protection and avoid direct skin contact. If you accidentally drop the skin, rinse it with plenty of water. For those who are allergic to skin, please Immediate medical treatment does not usually have an effect.

10. For more convenient use of UV, we can use some UV glue construction tools. Example: Manual UV glue cartridge kit.

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Adhesive bubble treatment method when stirring glue

Adhesive bubble treatment method when stirring glue. When the glue is stirred, a glue bubble is generated. It is best to use a vacuum machine to draw air bubbles. Stir thoroughly and move quickly to the vacuum tank to defoam. The bubbles will cause the liquid surface to rise and the liquid level will drop after the bubbles break. Vacuum size and vacuum time, look at the viscosity of the glue and the requirements of the product surface (Debubbling time is generally: 2 to 4 minutes). If there is no vacuum machine, it can be stirred clockwise for 2~3 minutes. After mixing evenly, the glue can be placed for 5~20 minutes to automatically deaerate.

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Evenly mix glue component A and the component B for the electronic sealant

Evenly mix adhesive and stirring for the electronic sealant. When the A and B glues are mixed, pour the proportion into the proportion The parts are mixed. Mix with stirring in one direction, not too fast and stir for about 3 minutes. Stir the bottom, wall, etc. of the container. If it is not evenly mixed, incomplete curing will occur later. The mixing vessel must be about 3 times the stirring compound.