果壳网的mooc学院:Parlor Article Lighting chapter--Wall lamp

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[Concept]
    Wall (wall lamp) is the interior lighting, by definition, the lamps mounted on the wall.
    More commonly with a white glass shade. More in the 15-40 watt bulb is about power
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[For use]
    Light, elegant and harmonious, the environment can be embellished elegant, splendid, especially the room especially for the wedding.
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【Type】
    Ceiling, wall color, bedside lamp, mirror wall, etc.
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[Construction] installation
    Wall installation method is relatively simple, to be sure the location is good, the major wall lamp is fixed, often using embedded parts or drilling method, the wall to the wall.
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[Glue construction]
    Glue more, but there are several commonly used.
1. Brush Method
Brushing with a brush in adhesive bonding to the surface, this is the most simple and most commonly used method. This method is suitable for single or small batch production and construction.
2. Spray
For low viscosity of the adhesive can be used for ordinary paint spray gun. For those active short, difficult to clean high-viscosity adhesives, reinforced plastics industry can use the system from Bert gun. Spray coating method has the advantage of uniform, high efficiency; disadvantage is loss of large glue (about 20 ~ 40%), solvent lost to the air pollution of the environment.
3. Gravity method
The use of rain automatic device. This method is ideal for flat plate-like parts, high efficiency, suitable for mass production. To glue will not plug the nozzle, the use of glue must have the appropriate viscosity and fluidity.
4. Roll coating method
Immersed in the lower half of the glue roller in the top half exposed, directly or indirectly through the printed face roller contact, roller driven by rotating the workpiece so the glue applied to the bonding surface. To achieve the effect of different coating, roller wheat flour can open a different grooves and patterns can also be used to change the pressure roller or scraper control the amount of glue. Cots can be rubber, wood, felt, or metal.
5. Scratch method
For the high viscosity of the paste adhesive and body shape and type of adhesive for the floor pieces, as such, can be used to benefit the plastic sheet coating. To 1 ~ 1.5mm thick plastic sheet can be flexible steel, PVC board and other materials.
6. Other coating methods
Coating method such as dipping, dispensing method.
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[Dry work and landscapes]
Adhesive bonding to the surface after brushing in order to make easy to spread the adhesive, infiltration, penetration and evaporation of the solvent, any of its exposure to air for some time. Coating over from the beginning, until the two adhesive surface lamination standing until this process, called the dry set.
After two adhesive surface in the coating, dry home after their fit with each other, but without clamping force, and make it static storage for some time. From the bonding surface of each fitting (assembly) at the beginning, until the man with pre-compaction force until this process is called stationary storage landscapes (or inter landscapes, blocking accumulation). Storage time in the adhesive of water (or solvent) basically stopped evaporation. However, the proliferation, invasion and penetration is still slow.
Home and dry landscapes of time varies according to the type of adhesive, generally have the following three ways.
(1) do not need to set and dry landscapes, glue and pressed immediately after bonding. Fall into this category are adhesive skin glue, hot glue, and flux.
(2) After the glue needs to dry set, also allows landscapes. Fall into this category are solvent-based, latex-and solvent-containing organic chemical reaction type adhesive.
(3) both sides of the coating, dry set up the extent of State Tack coated stock with a fingertip touch, seems to stick to the degree of non-stick), immediately after the compression fitting, not landscapes. Fall into this category are the solution-based rubber adhesives.
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[Compression]
1. Pressed the need for
Produced during the curing adhesive bonding, while the role, so the adhesive curing process, to ensure close cooperation between the adhesive surface is guaranteed to produce an important role in bonding conditions: This requires that beginning in the adhesive before curing, the adhesive must be surface applied compaction force, contact pressure at least impose. If the curing process, the bonding between the surface can not remain close together, they are bound to have gaps in the adhesive layer, affecting the bond quality. Proper clamping force applied, can improve the infiltration and the adhesive to the surface irregularities of the permeability, helps form a complete thin uniform adhesive layer.
2. Clamping force size
Medical clamping force size and the type of adhesive and the substrate used and other factors, generally 0.2 ~ 1.5MPa of a wide range. Compression depends on the type of adhesive and curing temperature. Clamping force is applied generally start after fitting or landscapes, until the adhesive is fully cured or almost cured after the pressure dropped.
3. Pressed operating requirements
General operation of the compaction requirements are: the size of the appropriate clamping force, pressure distribution, pressed long enough, can not be glued to the body deformation under pressure (except in special circumstances) and so on.
4. Pressure method
Pressure method has many forms, the choice was glued to the body according to the type of shape features and characteristics of the input connection options. Compression methods are commonly used lever pressed heavy hammer, spring pressure ticket, multi-block weights Medical tight, tight sand bag area, airbags pad, spring pad, hot kettle, nail area tight, screw clamps pressed, of panels stacked tight areas such as law.
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[Cure]
Adhesive is cured by solvent evaporation or chemical reaction from a plastic state into a solid adhesive layer, while producing effects of physical and chemical bonding process. The quality of curing and curing conditions (temperature, time and clamping force, etc.) have an important relationship. Adhesive curing conditions used in Table 12-3-8.
Operation, must meet the requirements of the adhesive curing conditions, which is to ensure the quality of an important part of bonding.
Curing temperature of the curing speed and curing quality play a decisive role. Even the room temperature curing adhesive, to improve curing temperature (100 ℃ or less) is also beneficial.
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[Purchase] selected
1 wall style specification to be coordinated with the installation sites, such as the large room can double fire wall safe, a small room can be a single fire safety wall.
(2) wall color to coordinate with the installation of the wall color.
3 Wall of 薄厚 coordination with the installation site environment. If the optional four weeks empty big thick wall; an optional thin narrow wall if four weeks.
4 wall light power consistent with the intended use.
5 Wall mounting height to slightly higher than the head is appropriate.
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【Article is excerpted from: Baidu Encyclopedia】
【Network reprint / Just reference】
【Translation is by Goolge】