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Extrusion Adhesive Conveying Method for Gear Pump and Screw Pump

Extrusion adhesive conveying method means that under the pressure feeding mode, the adhesive and sealant are pumped to the glue gun or spray gun by a pressure tank (compressed air pressurized) or a liquid pump. Squeeze conveying is usually divided into pressure tank pressure conveying and liquid pump conveying methods.
gear pump. The working principle of the gear pump is that the two teeth gnawed together suck the liquid into the pump and then discharge it. The displacement of the gear pump can reach 1100OL/min, and the lift can reach 13788kPa. They can transport highly viscous corrosive fluids and can also be used to transport fluids containing low abrasive materials, and do not allow no-load operation. Gear pumps are self-priming and generally operate in both directions.

The single screw pump in the screw pump. It relies on the intermeshing of the screw and the bushing to produce volume changes in the suction cavity and the discharge cavity to transport the liquid. The screw pump can provide a continuous and stable liquid flow, and can transport certain fluids with particles. The screw pump has excellent suction characteristics and is self-priming, but cannot be run without load.

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Two-Component Two-Liquid Static Dynamic Pressure Tank Supply System

Two-Component Two-Liquid Static Dynamic Pressure Tank Supply System

Two-component two-liquid static dynamic pressure tank supply system is one of the glue supply systems. The other is a one-component pressure tank supply system.
The single component is relatively simple, and the two-component two-liquid static dynamic pressure tank supply system is mainly introduced here.
Its working principle is that the base of the two-component glue and the curing agent are respectively loaded into the pressure tank, and are respectively pressed out from the respective pressure tanks. If the base material is relatively large, it is easy to mix the bubbles. The pressure tank is equipped with an automatic stirrer to stir the base material to facilitate its flow. If the curing agent is sensitive to moisture, the air inlet of the curing agent pressure tank is equipped with a dehumidifier or pressure. The tank is filled with nitrogen, and both components are supplied to their respective gear metering pumps (external gear pump and internal gear pump). The two gear pumps pass through their respective reducers and then a stepless speed changer. Connected to ensure that the ratio of the two components is steplessly adjusted. The driving force of the gear pump is a pneumatic motor. The pneumatic characteristics can be used to stop the glue immediately when the glue gun is closed.

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Polyurethane body decorative weld

Title:polyurethane body decorative weld
The polyurethane can be cured at room temperature or heated to 100 ° C.
Moreover, the film is resistant to impact, has good flexibility, and has high adhesive strength. After curing, the volume shrinkage is small and the aging resistance is excellent. It is an excellent welding sealing material.
This one-component polyurethane sealant, after being glued for 60 minutes, is then dried in the baking booth for 1 min at 90 ° C to be fully cured. Polyurethane sealant has good workability, strong adhesion to epoxy primer, good thixotropic property, easy to flatten, no shrinkage, smooth rubber surface, and does not affect the appearance of the car.

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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.