CN108995047B - Marble blackboard manufacturing process - Google Patents
Marble blackboard manufacturing process Download PDFInfo
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- CN108995047B CN108995047B CN201810784047.XA CN201810784047A CN108995047B CN 108995047 B CN108995047 B CN 108995047B CN 201810784047 A CN201810784047 A CN 201810784047A CN 108995047 B CN108995047 B CN 108995047B
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- blackboard
- marble
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- sand blasting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
- B28D1/003—Multipurpose machines; Equipment therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
- B43L1/00—Repeatedly-usable boards or tablets for writing or drawing
- B43L1/04—Blackboards
- B43L1/06—Blackboards rigid
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Laminated Bodies (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The invention relates to a marble blackboard manufacturing process which comprises the steps of milling marble plates, grinding the marble plates to obtain a blackboard base layer, cutting to obtain a blackboard surface layer, soaking the blackboard surface layer, cleaning the blackboard surface layer, carrying out sand blasting treatment on the blackboard surface layer, baking the blackboard surface layer, cooling, and bonding the blackboard base layer and the blackboard surface layer to obtain a marble blackboard. By adopting the technical scheme of the invention, the blackboard base layer is smoother and smoother through cutting processing, the bonding between the blackboard surface layer and the blackboard base layer is firmer and more reliable, the appearance quality of a product is improved, the blackboard surface layer is firstly soaked in the pretreatment solution before sand blasting treatment, redundant impurities are removed, high-temperature baking is carried out after sand blasting treatment, sand blasting materials are completely and reliably attached to the blackboard base layer, students can watch and learn on the blackboard, and the prepared marble blackboard has the advantages of firmness, durability, long service life, fashionable appearance and the like.
Description
Technical Field
The invention belongs to the technical field of teaching aids, and particularly relates to a marble blackboard manufacturing process.
Background
The blackboard is a teaching aid widely used in the existing classroom teaching activities, the preparation materials of the blackboard are mainly made of alloy steel plates, ground glass, wood plates, concrete and various novel composite materials, the basic structure of the existing blackboard is that a wear-resistant writing coating is coated on the board surface made of a certain material, then the blackboard is made into a certain size for use according to needs, and a pen with similar functions and chalk can not be detached during use. Among the prior art, the marble has extensive application in furniture manufacturing, the marble surface is smooth, the outward appearance is fashionable, one of the decoration raw and other materials that people like has become, however, the blackboard of using marble preparation is then unusual, do it because the marble surface is comparatively smooth, and the blackboard face if too smooth, can make visible light take place mirror surface reflection on the blackboard face, be unfavorable for the student to see clearly the writing of writing on the blackboard, the widely used sandblast processing technique is used for improving the roughness on object surface among the prior art, however marble material itself belongs to calcium carbonate rock series, when ambient temperature exceedes 180 ℃, phenomenons such as rotten, discolour can then appear in the marble inside, this has brought very big degree of difficulty for marble's application and sandblast processing technology.
Disclosure of Invention
In order to solve the technical problems, the invention provides a marble blackboard manufacturing process.
The invention provides a marble blackboard manufacturing process, which comprises the following steps:
the method comprises the following steps: taking a natural marble plate, milling the marble plate by using a milling machine, cutting most of materials on the marble plate to ensure that the roughness of each surface of the marble plate reaches below 25 micrometers and the marble plate has a regular cuboid shape;
step two: grinding the marble plate by using a grinding machine to ensure that the surface roughness of the marble plate reaches below 12.5 microns to prepare a blackboard base layer;
step three: taking a metal plate, and cutting the metal plate according to the outline of the front face of the blackboard base layer in the step two to obtain a blackboard surface layer;
step four: putting the blackboard surface layer prepared in the step three into a pre-prepared pretreatment solution to be soaked for 30-60 min;
step five: cleaning the pretreatment solution on the surface of the blackboard surface by using clear water;
step six: sand blasting is carried out on the front face of the blackboard surface layer by using sand blasting equipment, so that a sand blasting layer is attached to the front face of the blackboard surface layer;
step seven: placing the blackboard surface layer subjected to sand blasting treatment into an oven for baking, wherein the baking temperature is 200-300 ℃, the baking duration is 30-60 min, so that the sand blasting layer is completely attached to the front surface of the blackboard surface layer, taking the blackboard surface layer out of the oven, flushing and cooling the surface of the blackboard surface layer by using clear water at the temperature of 40-60 ℃, and then placing the blackboard surface layer in a cool and ventilated place to naturally cool the surface of the blackboard surface to room temperature;
step eight: coating marble glue on the front surface of the blackboard base layer, bonding the back surface of the blackboard surface layer on the front surface of the blackboard base layer, applying proper pressure to the blackboard surface layer, and after the marble glue is cured, coating blackboard paint on the outer surface of the sand blasting layer to obtain the marble blackboard.
In the first step, the technological parameters for milling the marble plate by using the milling machine are as follows: the main shaft rotating speed is 800 r/min-1200 r/min, and the feeding amount is 60 mm/min-80 mm/min.
In the second step, the technological parameters for grinding the marble plate by using the grinding machine are as follows: a diamond grinding wheel with the granularity of B100 is configured on the grinding machine, the diameter of the grinding wheel is phi 150 mm-phi 250mm, the linear speed of the grinding wheel is 25 m/s-35 m/s, and the feed rate is 10 mm/min-20 mm/min.
In the third step, the thickness of the blackboard surface layer is 2 mm-5 mm.
The pretreatment solution in the fourth step comprises the following components: 80-100 g/L of zinc nitrate, 15-20 g/L of hydrochloric acid, 30-40 g/L of phosphoric acid, 6-10 g/L of sodium peroxide and the balance of water.
And in the sixth step, the thickness of the sand blasting layer is 0.5 mm-1 mm.
And step six, sand blasting is carried out on the front surface of the blackboard surface layer by using sand blasting equipment, wherein the sand blasting raw material is a mixture of carborundum, iron ore sand and quartz sand.
The technological parameters for bonding the blackboard surface layer and the blackboard base layer in the step eight are as follows: the pressure applied to the blackboard surface layer is as follows: 800kgf/m2～1200kgf/m2The duration of the applied pressure is 10min to 15min, and the dosage of the marble adhesive is 600mL/m2～800mL/m2。
The invention has the beneficial effects that: by adopting the technical scheme provided by the invention, the prepared marble blackboard is formed by bonding the blackboard base layer and the blackboard surface layer, the blackboard base layer is firstly processed by cutting to enable each surface of a marble plate to be smoother and smoother, the appearance quality of the product is improved, the blackboard surface layer is firstly soaked by acidic pretreatment solution, after various impurities on the surface of the blackboard surface are removed, the blackboard surface layer is subjected to sand blasting treatment, then the blackboard surface layer is subjected to high-temperature baking after sand blasting, the sand blasting raw material is completely attached to the blackboard surface layer in a high-temperature environment, the sand blasting treatment quality is improved, the sand blasting effect is better, the blackboard base layer and the blackboard surface layer are bonded together in a pressurized bonding mode after the blackboard surface layer is cooled, and marble glue which can be cured at normal temperature is used for bonding, so that a high-temperature object is prevented from being directly attached to the surface of the blackboard base layer, and the blackboard base, prevent it and appear rotting, improved manufacturing quality, blackboard surface layer surface is after the sandblast is handled, and the diffuse reflection can only take place on visible light its surface, makes the student in the classroom all can see clearly the writing on the blackboard from all angles, has made things convenient for the use, and on the other hand, the structural strength of blackboard has been strengthened to the surface course, and the blackboard basic unit is sturdy and durable, and the outward appearance fashion does not rust, long service life, and the preparation material is easily purchased, can popularize and apply in vast rural area school.
Drawings
FIG. 1 is a flow chart of a manufacturing process of the present invention;
fig. 2 is a schematic diagram of the structure of the marble blackboard of the invention.
In the figure: 1-blackboard base layer, 2-blackboard surface layer and 3-sand blasting layer.
Detailed Description
The technical solution of the present invention is further explained with reference to the accompanying drawings, but the claimed protection scope is not limited thereto;
the invention provides a process for manufacturing a marble blackboard, which comprises the following steps as shown in figures 1 and 2:
the method comprises the following steps: taking a natural marble plate, milling the marble plate by using a milling machine, cutting most of materials on the marble plate to ensure that the roughness of each surface of the marble plate reaches below 25 micrometers and the marble plate has a regular cuboid shape; further, the milling process parameters of the marble plate by using the milling machine are as follows: the main shaft rotating speed is 800 r/min-1200 r/min, and the feeding amount is 60 mm/min-80 mm/min.
Step two: grinding the marble plate by using a grinding machine to ensure that the surface roughness of the marble plate reaches below 12.5 microns to prepare a blackboard base layer 1; further, the technological parameters for grinding the marble plate by using the grinding machine are as follows: a diamond grinding wheel with the granularity of B100 is configured on the grinding machine, the diameter of the grinding wheel is phi 150 mm-phi 250mm, the linear speed of the grinding wheel is 25 m/s-35 m/s, and the feed rate is 10 mm/min-20 mm/min.
Step three: taking a metal plate, and cutting the metal plate according to the outline of the front surface of the blackboard base layer 1 in the step two to obtain a blackboard surface layer 2; further, the thickness of the blackboard surface layer 2 is 2 mm-5 mm.
Step four: putting the blackboard surface layer 2 prepared in the step three into a pre-prepared pretreatment solution to be soaked for 30-60 min; further, the pretreatment solution had the following composition: 80-100 g/L of zinc nitrate, 15-20 g/L of hydrochloric acid, 30-40 g/L of phosphoric acid, 6-10 g/L of sodium peroxide and the balance of water.
Step five: cleaning the pretreatment solution on the surface of the blackboard surface layer 2 by using clear water;
step six: sand blasting is carried out on the front surface of the blackboard surface layer 2 by using sand blasting equipment, so that a sand blasting layer 3 is attached to the front surface of the blackboard surface layer 2; further, the thickness of the sand blasting layer 3 is 0.5 mm-1 mm. And (3) sand blasting is carried out on the front surface of the blackboard surface layer 2 by using sand blasting equipment, and the sand blasting raw material is a mixture of carborundum, iron ore sand and quartz sand.
Step seven: placing the blackboard surface layer 2 subjected to sand blasting treatment into an oven for baking, wherein the baking temperature is 200-300 ℃, the baking duration is 30-60 min, so that the sand blasting layer 3 is completely attached to the front surface of the blackboard surface layer 2, then taking the blackboard surface layer 2 out of the oven, washing and cooling the surface of the blackboard surface layer with clear water at the temperature of 40-60 ℃, and then placing the blackboard surface layer 2 in a cool and ventilated place to naturally cool the surface of the blackboard surface layer to room temperature;
step eight: coating marble glue on the front surface of the blackboard base layer 1, bonding the back surface of the blackboard surface layer 2 on the front surface of the blackboard base layer 1, applying proper pressure to the blackboard surface layer 2, and after the marble glue is cured, coating blackboard paint on the outer surface of the sand-spraying layer 3 to obtain the marble blackboard. Further, the technological parameters for bonding the blackboard surface layer 2 and the blackboard base layer 1 are as follows: the pressure applied to the blackboard surface layer 2 is as follows: 800kgf/m2～1200kgf/m2The duration of the applied pressure is 10min to 15min, and the dosage of the marble adhesive is 600mL/m2～800mL/m2。
By adopting the technical scheme provided by the invention, the prepared marble blackboard is formed by bonding the blackboard base layer and the blackboard surface layer, the blackboard base layer is firstly processed by cutting to enable each surface of a marble plate to be smoother and smoother, the appearance quality of the product is improved, the blackboard surface layer is firstly soaked by acidic pretreatment solution, after various impurities on the surface of the blackboard surface are removed, the blackboard surface layer is subjected to sand blasting treatment, then the blackboard surface layer is subjected to high-temperature baking after sand blasting, the sand blasting raw material is completely attached to the blackboard surface layer in a high-temperature environment, the sand blasting treatment quality is improved, the sand blasting effect is better, the blackboard base layer and the blackboard surface layer are bonded together in a pressurized bonding mode after the blackboard surface layer is cooled, and marble glue which can be cured at normal temperature is used for bonding, so that a high-temperature object is prevented from being directly attached to the surface of the blackboard base layer, and the blackboard base, prevent it and appear rotting, improved manufacturing quality, blackboard surface layer surface is after the sandblast is handled, and the diffuse reflection can only take place on visible light its surface, makes the student in the classroom all can see clearly the writing on the blackboard from all angles, has made things convenient for the use, and on the other hand, the structural strength of blackboard has been strengthened to the surface course, and the blackboard basic unit is sturdy and durable, and the outward appearance fashion does not rust, long service life, and the preparation material is easily purchased, can popularize and apply in vast rural area school.
Claims (8)
1. A marble blackboard manufacturing process is characterized in that: the method comprises the following steps:
the method comprises the following steps: taking a natural marble plate, milling the marble plate by using a milling machine, cutting most of materials on the marble plate to ensure that the roughness of each surface of the marble plate reaches below 25 micrometers and the marble plate has a regular cuboid shape;
step two: grinding the marble plate by using a grinding machine to ensure that the surface roughness of the marble plate reaches below 12.5 microns to prepare a blackboard base layer (1);
step three: taking a metal plate, and cutting the metal plate according to the outline of the front surface of the blackboard base layer (1) in the step two to obtain a blackboard surface layer (2);
step four: putting the blackboard surface layer (2) prepared in the step three into a pre-prepared pretreatment solution to be soaked for 30-60 min;
step five: cleaning the pretreatment solution on the surface of the blackboard surface layer (2) by using clear water;
step six: sand blasting is carried out on the front surface of the blackboard surface layer (2) by using sand blasting equipment, so that a sand blasting layer (3) is attached to the front surface of the blackboard surface layer (2);
step seven: placing the blackboard surface layer (2) subjected to sand blasting treatment into an oven for baking at the baking temperature of 200-300 ℃ for 30-60 min so that the sand blasting layer (3) is completely attached to the front surface of the blackboard surface layer (2), taking the blackboard surface layer (2) out of the oven, washing and cooling the surface of the blackboard surface layer with clear water at the temperature of 40-60 ℃, and placing the blackboard surface layer (2) in a cool and ventilated place so that the surface of the blackboard surface layer is naturally cooled to room temperature;
step eight: coating marble glue on the front surface of the blackboard base layer (1), bonding the back surface of the blackboard surface layer (2) on the front surface of the blackboard base layer (1), applying proper pressure to the blackboard surface layer (2), and after the marble glue is cured, coating blackboard paint on the outer surface of the sand-spraying layer (3) to obtain the marble blackboard.
2. The marble blackboard manufacturing process of claim 1, wherein: in the first step, the technological parameters for milling the marble plate by using the milling machine are as follows: the main shaft rotating speed is 800 r/min-1200 r/min, and the feeding amount is 60 mm/min-80 mm/min.
3. The marble blackboard manufacturing process of claim 1, wherein: in the second step, the technological parameters for grinding the marble plate by using the grinding machine are as follows: a diamond grinding wheel with the granularity of B100 is configured on the grinding machine, the diameter of the grinding wheel is phi 150 mm-phi 250mm, the linear speed of the grinding wheel is 25 m/s-35 m/s, and the feed rate is 10 mm/min-20 mm/min.
4. The marble blackboard manufacturing process of claim 1, wherein: in the third step, the thickness of the blackboard surface layer (2) is 2 mm-5 mm.
5. The marble blackboard manufacturing process of claim 1, wherein: the pretreatment solution in the fourth step comprises the following components: 80-100 g/L of zinc nitrate, 15-20 g/L of hydrochloric acid, 30-40 g/L of phosphoric acid, 6-10 g/L of sodium peroxide and the balance of water.
6. The marble blackboard manufacturing process of claim 1, wherein: in the sixth step, the thickness of the sand blasting layer (3) is 0.5 mm-1 mm.
7. The marble blackboard manufacturing process of claim 1, wherein: and in the sixth step, sand blasting equipment is used for carrying out sand blasting on the front surface of the blackboard surface layer (2), wherein the sand blasting raw material is a mixture of carborundum, iron ore sand and quartz sand.
8. The marble blackboard manufacturing process of claim 1, wherein: the technological parameters for bonding the blackboard surface layer (2) and the blackboard base layer (1) in the step eight are as follows: the pressure applied to the blackboard surface layer (2) is as follows: 800kgf/m2～1200kgf/m2The duration of the applied pressure is 10min to 15min, and the dosage of the marble adhesive is 600mL/m2～800mL/m2。
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| CN201810784047.XA CN108995047B (en) | 2018-07-17 | 2018-07-17 | Marble blackboard manufacturing process |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1417040A (en) * | 2002-11-19 | 2003-05-14 | 林文水 | Ground glass blackboard and its production process |
| CN201080073Y (en) * | 2007-10-11 | 2008-07-02 | 周学智 | Multifunctional writing board |
| CN101818014A (en) * | 2009-01-09 | 2010-09-01 | 爱迪涂料股份有限公司 | Ambient cure water-based coatings for writable-erasable surfaces |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9056519B2 (en) * | 2008-07-18 | 2015-06-16 | Ideapaint, Inc. | Ambient cure solvent-based coatings for writable-erasable surfaces |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1417040A (en) * | 2002-11-19 | 2003-05-14 | 林文水 | Ground glass blackboard and its production process |
| CN201080073Y (en) * | 2007-10-11 | 2008-07-02 | 周学智 | Multifunctional writing board |
| CN101818014A (en) * | 2009-01-09 | 2010-09-01 | 爱迪涂料股份有限公司 | Ambient cure water-based coatings for writable-erasable surfaces |
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