A kind of ground glass blackboard and production method thereof
Technical field: a kind of ground glass blackboard of the present invention and production method thereof, belong to blackboard manufacturing technology field, particularly make the technical field of blackboard of glass.
Background technology: the blackboard that uses has cement blackboard, metal blackboard, " frosted " Glass blackboard at present, have after using after a while, the surface is corroded by air, sunlight, oxidation, rotten, what have exists rough surface, chalk dust more, they influence student eyesight on the one hand, and it is healthy to influence teachers and students on the other hand.As the metal blackboard since other auxiliary material to be three-ply board material etc. different with the degree of expanding with heat and contract with cold of metallic plate, cause the metal black slab integral yielding.And existing " frosted " Glass blackboard can only be called the sand blasting glass blackboard in the strictness, and is on the one hand because the surface is too coarse, concavo-convex obvious, chalk dust is more on the other hand, and chalk dust is easily ensconced recess, and is difficult for wiping clean, and blackboard is not black, be the lime look, the writing on the blackboard difficulty, writing is unintelligible.
Summary of the invention: technical problem to be solved by this invention provides and a kind ofly can overcome fine and smooth, not reflective, the fluent writing, comfortable in above-mentioned defective, Glass blackboard surface, good hand touch, the definition height, chalk dust is few, ground glass blackboard and the production method thereof easily wiped clean.The technical scheme that solves this technical problem employing is: a kind of ground glass blackboard, constitute by glass plate (1), backing (2) and framework (3), the front that it is characterized in that glass plate (1) is an opaque fine and smooth frosting (11), also be provided with layer of plastic film (23) on the skin of paint (21) of the back side backing (2) of glass plate (1), plastic sheeting (23) passes through one deck pressure-sensitive adhesive layer (22) tight adhesion on the skin of paint (21) at the back side of glass plate (1).A kind of production method of ground glass blackboard, comprise surface treatment, cleaning, back side processing, framework is installed four steps, it is characterized in that handle at the surface treatment and the back side is to be finished by following mode: 1. select for use 150 order to 1500 purpose micro mists (fine sand) to mix, in charging basket, form mixed liquor with water; 2. constantly the mixed liquor of micro mist in the charging basket and water is smoked by suction pump and enter mill central authorities; 3. mill rotates on horizontal plane under the drive of the suppressing action of self gravitation and frosted motor, makes micro mist produce the low pressure friction between glass plate (1) surface and mill; 4. the glass that grinds off particle in small, broken bits and micro mist and water mixed liquid sieve through sieving machine, turn back in the charging basket, use repeatedly; 5. frosted finishes, and handle at the back side is behind process cleaning, drying, mopping, airing, sprays one deck pressure sensitive adhesive (or adhesive sticker) layer (22) on the skin of paint (21) of ground glass backboard face, tightly is stained with layer of plastic film (23) again.The present invention compared with prior art has following advantage: 1. compare with existing " frosted " (real is sandblast) Glass blackboard, the surfacing exquisiteness of a kind of ground glass blackboard of the present invention, because its granularity of chalk dust during writing on the blackboard is greater than the frosted fineness, so chalk dust is wiped easily, does not stay dust, smoothness, comfortable, good hand touch during writing on the blackboard, the blackboard color is a black or blackish green, writing on the blackboard writing definition height, visibility is good, and sensation was better when the student looked at the blackboard; 2. owing on the paint face at the glass plate back side, brush last layer pressure sensitive adhesive (or adhesive sticker), tightly be stained with layer of plastic film again, therefore paint be difficult for oxidized, colour-fast, also incrust, than traditional dampproof method science more, more durable in use, be difficult for fragmentation, even glass breakage, also not splash is hurted sb.'s feelings, can become piece to change, use safer; 3. from the cost accounting of the back side backing barrier material of ground glass blackboard, barrier material of the present invention adopts pressure sensitive adhesive or adhesive sticker and plastic sheeting, with low cost, every square metre only needs 1 yuan, and production, fitting operation are conveniently, and the backing barrier material of tradition " frosted " Glass blackboard is to adopt plastic foam, cloth, malthoid, will use 2 yuans for every square metre, and production, installation, inconvenient operation; 4. compare with the metal blackboard, ground glass blackboard of the present invention is indeformable, more durable in use, and writes comfortablely, and writing is clear, chalk dust is few, welcome by teachers and students.
Description of drawings: Fig. 1 is the cross section cut-away view of a kind of ground glass blackboard of the present invention; Fig. 2 is the production method flow chart of a kind of ground glass blackboard of the present invention.
The specific embodiment: now in conjunction with the accompanying drawings, elaborate embodiments of the invention.As attached Figure 1 and Figure 2, earlier glass plate (1) is lain on the horizontal plane of mill platform, the frosted motor that will have the frosted dish again be placed on glass plate (1) above, the opening part of the frosted dish central authorities on the frosted motor is circumscribed with the siphunculus of 150 order to 1500 purpose micro mists (fine sand) and water mixed liquid, micro mist and water mixed liquid are got to the opening part of frosted dish central authorities through suction pump in charging basket, during the work of frosted motor, work horizontally rotates, micro mist (fine sand) rubs between glass plate (1) face and frosted dish, owing to also be mixed with water in the frosted process, it can take away a large amount of heats rapidly, again because the tiny glass particle that is ground off and the mixed liquor automatic stream sieving machine of micro mist (fine sand) and water, after sieving, the mixed liquor of sizeable tiny glass particle and micro mist and water turns back in the charging basket again, use repeatedly capable of circulation like this, minimizing contaminated environment or effect free from environmental pollution are played in few externally discharging or not externally discharging.Like this, glass plate (1) towards the top frosting (11) of just being worn into uniform and smooth, the upper and lower faces of glass plate (1) through clean up, after the airing, it is to brush one deck skin of paint (21) that glass plate (1) back side backing (2) is handled, and lacquer is sprayed one deck pressure sensitive adhesive or adhesive sticker (22) after doing, tightly be stained with layer of plastic film (23) again, at last, load onto framework (3), just constitute a kind of ground glass blackboard of the present invention.To sum up, the outermost of a kind of ground glass blackboard of the present invention is the frosting (11) of the not rear reflector plate (1) of frosted, the back of glass plate (1) is one deck skin of paint (21), is one deck pressure-sensitive adhesive layer (22) (or non-drying glue layer) between skin of paint (21) back and the layer of plastic film (23).Ground glass blackboard of the present invention surface is fine and smooth, and not reflective, writing on the blackboard is comfortable, good hand touch, and writing is clear, and the student sees clearly Chu, and chalk dust is few, is easy to wipe clean, and welcome by numerous teachers and students.Again because it is cheap, durable in use, safe in utilization, first choice of school, enterprises and institutions.
