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Marble-like blackboard and its making technology

A marble and blackboard technology, applied in the field of blackboards for teaching, can solve the problems of reflection, fragility, and unevenness of cement blackboards, and achieve the effects of simple production process, easy promotion and implementation, and no toxic and side effects

Inactive Publication Date: 2006-02-15
管祖美 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the prior art, along with the development of the economy, blackboards for teaching are from wooden blackboards, cement blackboards to metal (magnetic) blackboards through frosted glass blackboards. The blackboard is not smooth, reflective, inconvenient to wipe and write; the frosted glass blackboard is inconvenient to wipe, makes a whistling sound when writing, and is easy to break. Metal (magnetic) blackboards are smooth, non-reflective, easy to write and easy to erase. But there are disadvantages of high price and unavoidable rust
Chinese patent 99114196.2 discloses "blackboards made of polymer materials" aiming at the deficiencies of the above-mentioned technologies, providing a polymer material blackboard made of epoxy resin or unsaturated resin, fillers, pigments, solvents, etc., but its raw materials It is not easy to buy in rural areas and small towns, and it is toxic and inconvenient to operate. The surface needs to be sprayed with black paint, and it is inevitable that it will wear and tear and need to be painted several times

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Weigh the raw materials according to the following ratio, prepare fabric glue, then add 20kg of water and 72kg of cement, and prepare two 4 square meter blackboard boards according to the following process. Bone glue 3.3kg, soda ash 130g, soot black 2kg, swire oil 80g, preservative 40g, water 34kg.

[0015] The preparation process is as follows:

[0016] Take bone glue and soda ash according to the stated ratio, add a small amount of water and dissolve it in the barrel, heat it with water to melt it completely, stir, add soot black and mix it into a paste, refine it, add sage oil, preservatives and the rest of the water and mix well spare. Fully mix the weighed cement and water with the prepared fabric glue.

[0017] The mold is made of organic board, and soapy water or polyvinyl alcohol glue is used as a release agent to coat the inside of the mold. Then pour the above mixture into the mold, vibrate with a vibrator for 10 minutes to make it firm, sprinkle cement on ...

Embodiment 2

[0020] Weigh the raw materials according to the following proportions, prepare the fabric glue, add 15kg of water and 40kg of cement, and prepare 1 blackboard of 4 square meters according to the process of Example 1. The proportion of fabric glue is: 1.65kg of bone glue, 65g of soda ash, 1kg of soot, 40g of swire oil, 150g of crested acid, and 15kg of water.

Embodiment 3

[0022] Weigh the raw materials according to the following proportions, prepare the fabric glue, add 10kg of water and 20kg of cement, and then prepare a blackboard according to the process of Example 1. The proportion of fabric glue is: bone glue 2.5kg, soda ash 140g, soot black 1.5kg, swire oil 60g, crested acid 150g, water 20kg.

[0023] The raw materials used in the examples can be purchased in small and medium-sized chemical building material stores in districts and counties, and the cement particle size is 100 mesh.

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Abstract

A marble-like blackboard is made up from adhesive, cement, water, metal wire mesh and concrete filler through uniformly and curing. Its advantages include high durability and water resistance, no need of painting, no toxic by-effect and low cost.

Description

technical field [0001] The invention relates to a blackboard for teaching, in particular to a simulated marble blackboard and a manufacturing process thereof. Background technique [0002] In the prior art, along with the development of the economy, blackboards for teaching are from wooden blackboards, cement blackboards to metal (magnetic) blackboards through frosted glass blackboards. The blackboard is not smooth, reflective, inconvenient to wipe and write; the frosted glass blackboard is inconvenient to wipe, makes a whistling sound when writing, and is easily broken. But there are disadvantages of high price and unavoidable rust. Chinese patent 99114196.2 discloses "blackboards made of polymer materials" aiming at the deficiencies of the above-mentioned technologies, providing a blackboard made of polymer materials composed of epoxy resin or unsaturated resin, fillers, pigments, solvents, etc., but its raw materials It is not easy to buy in rural areas and small towns,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B43L1/06B28B1/08
Inventor 管祖美蔡如尤
Owner 管祖美
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