CN112760635B

CN112760635B - Novel single crystal alumina powder coating hot pressing device and process

Info

Publication number: CN112760635B
Application number: CN202110193069.0A
Authority: CN
Inventors: 赵兵; 付善任; 张红
Original assignee: Shanghai Lanyue New Material Technology Co ltd
Current assignee: Shanghai Lanyue New Material Technology Co ltd
Priority date: 2021-02-20
Filing date: 2021-02-20
Publication date: 2023-09-08
Anticipated expiration: 2041-02-20
Also published as: CN112760635A

Abstract

The invention discloses a novel single crystal alumina powder coating hot pressing device and a novel single crystal alumina powder coating hot pressing process, wherein the novel single crystal alumina powder coating hot pressing device comprises a feeding winch, a carbon rod heating pipe and a fixed transverse plate, the high ductility and the thermal expansion and contraction properties of metal are utilized, the single crystal sapphire powder is extruded into the surface of the metal by adopting a hot extrusion technology, the first guide shaft, the second guide shaft and the third guide shaft are cooperatively arranged, the angle deflection of a metal plate is reduced in the advancing process, the spreading brush is driven to rotate through the rotation of the rotating end of the first motor, the spreading thickness of the single crystal sapphire powder can be controlled, the spreading uniformity is improved, the powder spreading and scattering can be restrained through the arrangement of a blocking cover, the pollution to the outside is reduced, an electric cylinder and the second motor are started through an external switch, the U-shaped plate is driven by the extension of the telescopic end of the electric cylinder to enable the first rolling roller to move downwards, the second rolling roller is driven by the second motor, and the rolling of the metal plate is simultaneously realized through the cooperation of the second rolling roller.

Description

Novel single crystal alumina powder coating hot pressing device and process

Technical Field

The invention relates to the field of coating material application, in particular to a novel single crystal alumina powder coating hot pressing device and a novel single crystal alumina powder coating hot pressing process.

Background

With the rapid development of the industrial production of single crystal sapphire, a large amount of sapphire single crystal powder is produced in the sapphire processing (cutting and grinding) process. Since it is not used, it is often disposed of as solid waste, resulting in a great deal of waste. And because the physical and chemical properties are very stable, the soil can not be degraded or is difficult to chemically refine, the environment-friendly recovery and treatment are very difficult, and the soil and the underground water are polluted. The sapphire powder is monocrystalline alpha-phase alumina, has high purity, uniform and fine particles, no color, transparency, insulation, corrosion resistance, acid and alkali resistance, high temperature resistance (melting point is 2050 ℃), thermal shock resistance and stable property, and can be used as an excellent coating material. Can be widely applied to metal surface coating, and improves the physical and chemical properties of metal such as insulation, corrosion resistance and the like. Meanwhile, the waste can be changed into valuables, thereby creating income for enterprises and solving the problem of environmental protection and recovery.

Because the physical and chemical properties of the single crystal sapphire powder are very stable, the single crystal sapphire powder has no diffusion phenomenon with metal, and the technologies such as chemical spraying, electronic spraying and the like cannot be effectively applied, a hot pressing device for solving the problem of plating of the single crystal sapphire powder is needed.

Disclosure of Invention

The invention aims to provide a novel single crystal alumina powder coating hot pressing device and a novel single crystal alumina powder coating hot pressing process, so as to solve the problems in the background technology.

In order to achieve the above purpose, the present invention provides the following technical solutions:

the utility model provides a new-type single crystal alumina powder coating hot press unit, includes the bottom plate, two curb plates of bottom plate top symmetry fixedly connected with, one of them the lateral wall fixed mounting of curb plate has the second motor, two the equal fixedly connected with second backup pad in top of curb plate, two the fixed diaphragm of the common fixedly connected with in top of second backup pad, fixed diaphragm bottom fixed mounting has the electric jar, the flexible end fixedly connected with U-shaped plate of electric jar, the inboard rotation of U-shaped plate is connected with first pivot, the outside fixed cover of first pivot is equipped with first roller compression roller, two the inboard of curb plate rotates jointly and is connected with the second pivot, the outside fixed cover of second pivot is equipped with the second roller compression roller, the one end of second pivot run through in one of them behind the lateral wall of curb plate with the rotation end fixed connection of second motor, one side outside of bottom plate is provided with the feed hoist engine, two the opposite side outside of bottom plate is provided with the collection hoist engine, two the inboard is fixedly connected with two sets of heating mechanism jointly, the mechanism includes silicon thermocouple, standing groove and carbon rod, the inboard of carbon rod is connected with the heating pipe, the inboard of two sets of carbon rod, the equal standing groove is fixed connection has in the inboard of a plurality of heating pipes.

As a further scheme of the invention: the novel pavement structure comprises side plates, wherein four second guide shafts are connected to the inner sides of the side plates in a common rotation mode, first guide shafts are arranged right above the four second guide shafts, gaps are formed between the first guide shafts and the second guide shafts, two ends of the first guide shafts are correspondingly connected with the inner sides of the two side plates in a rotation mode, a blocking cover is fixedly connected to the tops of the two side plates in a common mode, three pavement mechanisms are sequentially arranged on the inner sides of the blocking cover from left to right, each pavement mechanism comprises a first motor, a connecting rod and a pavement brush, the top of each connecting rod is fixedly connected with the inner sides of the blocking cover, a first motor is fixedly arranged at the bottom end of each connecting rod, and each pavement brush is horizontally arranged.

As still further aspects of the invention: and a feeding mechanism is fixedly connected between the two first support plates.

As still further aspects of the invention: the first rolling roller is arranged right above the second rolling roller.

As still further aspects of the invention: the heat insulation groove is made of alumina fiber felt.

As still further aspects of the invention: the collecting winch, the heating device, the thermocouple, the electric cylinder, the first motor, the second motor and the silicon carbide rod heating pipe are all electrically connected with the external switch through wires.

A novel hot pressing process for a single crystal alumina powder coating comprises the following steps:

step one: preparing a roll of stainless steel sheet metal with the thickness of 1mm, winding the stainless steel sheet metal on a winding drum of a feeding winding machine, enabling one end of the sheet metal to pass through between a first guide shaft and a second guide shaft, simultaneously passing through between a first roller pressing roller and a second roller pressing roller, and connecting one end of the stainless steel sheet metal on the winding drum of a collecting winding machine;

step two: the sapphire powder is spread on the upper surface of the stainless steel metal plate by feeding through a feeding mechanism, and traction transmission is carried out by starting a feeding winch and a collecting winch, wherein the transmission rate is 10 mm/h-200 mm/h;

step three: the distance between the spreading brush and the stainless steel metal plate is the thickness of the sapphire powder spreading (the distance is 0.1-1 mm), the brush can be driven to rotate in the horizontal direction (the rotation speed is 1-5 r/min) by starting the first motor through the rotating end of the first motor, so that the sapphire powder is uniformly spread on the whole plate, and meanwhile, the sapphire powder can be prevented from being scattered by mechanical vibration and indoor airflow lifting;

step four: under the stainless steel sheet metal, an insulating layer is made of alumina fiber blanket in the range of a process heating zone, two thermocouples in two groups of heating mechanisms are used for independently controlling the temperature by a mechanism (a group of low and medium temperatures and a group of medium and high temperatures), a silicon carbide rod heating pipe is used for heating, so that the stainless steel sheet metal is gradually heated, the stainless steel sheet metal is prevented from being thermally deformed due to sudden high temperature, and in the process of heating the stainless steel sheet metal, the first group is heated to 600 ℃ and the second group is heated to 900 ℃;

step five: the stainless steel metal plate is in rolling fit through the first rolling roller and the second rolling roller, the pressure is 500MPa, after rolling, the single crystal sapphire powder can be tightly embedded into the stainless steel metal plate, the volume of the single crystal sapphire powder is shrunk along with gradual cooling of the stainless steel metal plate, the embedding of the single crystal sapphire powder can be more compact and firm, and the process of preparing the single crystal sapphire powder coating on the surface of the metal plate is finished.

Compared with the prior art, the invention has the beneficial effects that:

1. through the cooperation setting of first guiding axle, second guiding axle and third guiding axle, reduce sheet metal and be difficult for taking place the angle deflection at advancing the in-process, advance more stably, rotate through the rotation end of first motor and drive the shop material brush and rotate, can control the spread thickness of single crystal sapphire powder and improve spread the homogeneity, through the setting of separation cover, can restrain the powder and raise the scattered that takes off, reduce and cause the pollution to the outside.

Drawings

FIG. 1 is a schematic diagram of a novel single crystal alumina powder coating hot press apparatus and process.

FIG. 2 is a partial cross-sectional view of a novel single crystal alumina powder coating hot press apparatus and process.

FIG. 3 is a schematic diagram of a novel single crystal alumina powder coating hot press apparatus and a paving mechanism in the process.

The figure shows: the feeding hoist 1, the first guide shaft 2, the collecting hoist 3, the feeding mechanism 4, the spreading mechanism 5, the heat insulation and preservation tank 6, the heating device 7, the thermocouple 8, the first roller press roller 9, the second guide shaft 10, the bottom plate 11, the side plate 12, the second roller press roller 13, the blocking cover 14, the first support plate 15, the electric cylinder 16, the U-shaped plate 17, the first rotating shaft 18, the second rotating shaft 19, the first motor 20, the connecting rod 21, the spreading brush 22, the heating mechanism 23, the placing tank 24, the second support plate 25, the second motor 26, the silicon carbide rod heating pipe 27, the third guide shaft 28 and the fixed transverse plate 29.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Referring to fig. 1-3, in the embodiment of the present invention, a novel single crystal alumina powder coating hot pressing device includes a bottom plate 11, two side plates 12 are symmetrically and fixedly connected to the top of the bottom plate 11, a second motor 26 is fixedly installed on the side wall of one side plate 12, a second supporting plate 25 is fixedly connected to the top of each of the two side plates 12, a fixed transverse plate 29 is fixedly connected to the top of each of the two second supporting plates 25, an electric cylinder 16 is fixedly installed at the bottom of each of the fixed transverse plates 29, a U-shaped plate 17 is fixedly connected to the telescopic end of each of the electric cylinders 16, a first rotating shaft 18 is rotatably connected to the inner side of each of the U-shaped plates 17, a first roller 9 is fixedly sleeved on the outer side of each of the first rotating shaft 18, a second rotating shaft 19 is rotatably connected to the inner side of each of the two side plates 12, a second rotating shaft 13 is fixedly sleeved on the outer side of each of the second rotating shaft 19, one end of each of the second rotating shaft 19 is fixedly connected to the rotating end of the second motor 26, the first roller 9 is disposed on the side wall of one side plate 12, a first roller 13 is disposed on the right side of each of the second roller 13, a guide roller 11 is disposed on the other and is rotatably connected to the inner side plate 2, a guide roller 10 is disposed on the other and is rotatably and is disposed on the other side of the other side plate 2, and is in turn, and is connected to the other, and is disposed on the side plate 2 and guide plate 10, the spreading mechanism 5 comprises a first motor 20, a connecting rod 21 and spreading brushes 22, the top of the connecting rod 21 is fixedly connected with the top of the inner side of the barrier cover 14, the bottom end of the connecting rod 21 is fixedly connected with the first motor 20, the rotating ends of the first motor 20 are fixedly connected with the spreading brushes 22, the spreading brushes 22 are horizontally arranged, the inner sides of the two side plates 12 are fixedly connected with two groups of heating mechanisms 23 together, the heating mechanisms 23 comprise thermocouples 8, placing grooves 24 and silicon carbide heating pipes 27, the silicon carbide heating pipes 27 are uniformly provided with a plurality of, the silicon carbide heating pipes 27 are fixedly arranged on the inner sides of the placing grooves 24, the thermocouples 8 are fixedly arranged on the inner sides of the placing grooves 24, the outer sides of the placing grooves 24 in the two heating mechanisms 23 are fixedly connected with heat insulation grooves 6 together, the heat insulation grooves 6 are made of alumina fibers, the heating efficiency is prevented from escaping, the heating efficiency is improved, surrounding electromechanical devices are protected, heating elements of other materials, such as nickel chromium wires, silicon molybdenum rods and the like, can be used for heating carbon rod heating pipes in the two groups of heating mechanisms 23, a metal plate can be heated to 300-1500 ℃ according to the process requirement by the heating temperature and the use environment, the tops of the two side plates 12 are fixedly connected with a first supporting plate 15, a feeding mechanism 4 is fixedly connected between the two first supporting plates 15, the feeding mechanism 4 has a knocking function and a weighing function and is provided with a screen, the knocking frequency and the consumption of sapphire single crystal powder in a storage tank in unit time can be controlled, the screen can control the coarse and fine granularity of the powder and the knocking speed of the uniformity of spreading to be 0.2-5 times/s, and the spraying quantity of the powder is accurately controlled by combining weighing control, simultaneously, a screen mesh (200-1000 meshes) is matched to lead the electric heating device to uniformly fall on the metal sheet, and the collecting winch 3, the heating device 7, the thermocouple 8, the electric cylinder 16, the first motor 20, the second motor 26 and the silicon carbide rod heating pipe 27 are all electrically connected with an external switch through wires.

step one: preparing a roll of stainless steel sheet metal with the thickness of 1mm, winding the stainless steel sheet metal on a winding drum of a feeding winding machine 1, enabling one end of the sheet metal to pass through between a first guide shaft 2 and a second guide shaft 10, simultaneously passing through between a first roller pressing roller 9 and a second roller pressing roller 13, and connecting one end of the stainless steel sheet metal on the winding drum of a collecting winding machine 3;

step two: the feeding mechanism 4 is used for feeding, the sapphire powder is spread on the upper surface of the stainless steel sheet metal, and the feeding winch 1 and the collecting winch 3 are started to carry out traction transmission, wherein the transmission rate is 10 mm/h-200 mm/h;

step three: the distance between the spreading brush 22 and the stainless steel sheet metal is the thickness of the sapphire powder spreading (the distance is 0.1-1 mm), the brush can be driven to rotate in the horizontal direction (the rotation speed is 1-5 r/min) by starting the first motor 20 and the rotating end of the first motor 20, so that the sapphire powder is uniformly spread on the whole sheet, and meanwhile, the blocking cover 14 can prevent the sapphire powder from being scattered by mechanical vibration and indoor airflow;

step four: under the stainless steel sheet metal, an insulating layer is made of alumina fiber blanket within the range of a process heating zone, two thermocouples 8 in two groups of heating mechanisms 23 are independently controlled in temperature (one group of low and medium temperature and one group of medium and high temperature), a carbon silicon rod heating pipe 27 is used for heating, the stainless steel sheet metal is gradually heated, the stainless steel sheet metal is prevented from being thermally deformed due to sudden high temperature, and in the process of heating the stainless steel sheet metal, a first group is heated to 600 ℃ and a second group is heated to 900 ℃;

step five: the stainless steel metal plate is subjected to rolling fit through the first rolling roller 9 and the second rolling roller 13, the pressure is 500MPa, after rolling, the single crystal sapphire powder can be tightly embedded into the stainless steel metal plate, the volume shrinkage is realized along with gradual cooling of the stainless steel metal plate, the embedding of the single crystal sapphire powder can be more compact and firm, and the process of preparing the single crystal sapphire powder coating on the surface of the metal plate is finished.

The working principle of the invention is as follows:

by utilizing the high ductility and thermal expansion and contraction properties of metal, the single crystal sapphire powder is extruded into the metal surface by adopting a hot extrusion technology, after the metal is cooled, the sapphire single crystal powder is tightly inlaid in the metal, the first guide shaft 2, the second guide shaft 10 and the third guide shaft 28 are matched, the angle deflection of a metal plate in the advancing process is reduced, the advancing is more stable, the rotating end of the first motor 20 rotates to drive the spreading brush 22 to rotate, the spreading thickness of the single crystal sapphire powder can be controlled, the spreading uniformity is improved, the setting of the blocking cover 14 can inhibit the powder from spreading and scattering, pollution to the outside is reduced, the electric cylinder 16 and the second motor 26 are started through the external switch, the U-shaped plate 17 is driven to move downwards through the extension of the telescopic end of the electric cylinder 16, the second motor 26 drives the second roller press roller 13 to rotate, and meanwhile the metal plate is rolled through the matching of the second roller press roller 13.

Although the present invention has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present invention.

Claims

1. The utility model provides a single crystal alumina powder coating hot press unit, includes bottom plate (11), its characterized in that: two curb plates (12) of bottom plate (11) top symmetry fixedly connected with, one of them curb plate (12) lateral wall fixed mounting has second motor (26), two the equal fixedly connected with second backup pad (25) in top of curb plate (12), two the top of second backup pad (25) is fixedly connected with fixed diaphragm (29) jointly, fixed diaphragm (29) bottom fixed mounting has electric cylinder (16), the telescopic end fixedly connected with U-shaped board (17) of electric cylinder (16), the inboard rotation of U-shaped board (17) is connected with first pivot (18), the outside fixed cover of first pivot (18) is equipped with first roller compression roller (9), two the inboard joint rotation of curb plate (12) is connected with second pivot (19), the outside fixed cover of second pivot (19) is equipped with second roller compression roller (13), one end of second pivot (19) run through behind the lateral wall of one of curb plate (12) with the rotation end fixed connection of second motor (26), the outside of one side of bottom plate (11) is provided with U-shaped board (17), the outside of hoist (11) is provided with first pivot (23), the outside of two sets of (23) are provided with two sets of thermoelectric element (23) and are connected with two thermoelectric element (8) to generate heat mechanism (23), and two thermoelectric element (23) are connected together, and are connected together The utility model discloses a pavement material spreading machine, which comprises a placing groove (24) and a silicon carbide rod heating pipe (27), the silicon carbide rod heating pipe (27) is evenly provided with a plurality of, silicon carbide rod heating pipe (27) fixed mounting is in the inboard of placing groove (24), thermocouple (8) fixed mounting is in the inboard of placing groove (24), two the outside of placing groove (24) among heating mechanism (23) is fixedly connected with thermal-insulated heat preservation groove (6) jointly, two equal fixedly connected with first backup pad (15) in curb plate (12) top, two the inboard joint rotation of curb plate (12) is connected with four second guiding axle (10), four just above second guiding axle (10) all is provided with first guiding axle (2), be provided with the clearance between first guiding axle (2) and the second guiding axle (10), the both ends of first guiding axle (2) correspond and the inboard rotation of two curb plate (12) is connected with separation cover (14) jointly, the motor (14) are fixedly connected with separation cover (21) jointly by the inboard top of curb plate (12), be provided with respectively by three motor (21) and be connected with a connecting rod (21) and a connecting rod (20) top pavement material spreading mechanism (20) in proper order, the utility model discloses a connecting rod, including connecting rod (21), first motor (20), the rotation end fixedly connected with shop material brush (22) of first motor (20), shop material brush (22) are the level setting, collect hoist engine (3), heating device (7), thermocouple (8), electronic jar (16), first motor (20), second motor (26) and silicon carbide rod heating pipe (27) all are connected with external switch electricity through the wire.

2. The single crystal alumina powder coating hot press apparatus of claim 1, wherein: a feeding mechanism (4) is fixedly connected between the two first supporting plates (15).

3. The single crystal alumina powder coating hot press apparatus of claim 1, wherein: the first roller press roller (9) is arranged right above the second roller press roller (13).

4. The single crystal alumina powder coating hot press apparatus of claim 1, wherein: the heat insulation groove (6) is made of alumina fiber felt.

5. A process for hot pressing using the single crystal alumina powder coating hot pressing apparatus of claim 1, characterized in that: the method comprises the following steps:

step one: preparing a roll of stainless steel sheet metal with the thickness of 1mm, winding the stainless steel sheet metal on a winding drum of a feeding winding machine (1), enabling one end of the sheet metal to pass through a space between a first guide shaft (2) and a second guide shaft (10) and pass through a space between a first roller press roller (9) and a second roller press roller (13), and connecting one end of the stainless steel sheet metal on the winding drum of a collecting winding machine (3);

step two: feeding is carried out through a feeding mechanism (4), monocrystalline alumina powder is spread on the upper surface of a stainless steel metal plate, and traction transmission is carried out through a feeding winch (1) and a collecting winch (3) by starting the feeding winch (1) and the collecting winch, wherein the transmission rate is 10 mm/h-200 mm/h;

step three: the distance between the spreading brush (22) and the stainless steel metal plate is the thickness of spreading single crystal alumina powder, the distance is 0.1 mm-1 mm, the brush can be driven to rotate in the horizontal direction by starting the first motor (20) through the rotating end of the first motor (20), the rotation speed is 1 r/min-5 r/min, so that the single crystal alumina powder is uniformly spread on the whole plate, and meanwhile, the single crystal alumina powder can be prevented from being scattered by mechanical vibration and indoor airflow lifting by the barrier cover (14);

step four: in the range of a process heating area below the stainless steel sheet metal, an aluminum oxide fiber felt is utilized to manufacture a heat insulation layer, two thermocouples (8) in two groups of heating mechanisms (23) are independently controlled in temperature, one group of low-medium temperature and one group of medium-high temperature are used for heating a silicon carbide rod heating pipe (27), so that the stainless steel sheet metal is gradually heated, the stainless steel sheet metal is prevented from being deformed by sudden high temperature, the first group is heated to 600 ℃ and the second group is heated to 900 ℃ in the process of heating the stainless steel sheet metal;

step five: the stainless steel metal plate is in rolling fit through the first rolling roller (9) and the second rolling roller (13), the pressure is 500MPa, after rolling, the single crystal alumina powder can be tightly embedded into the stainless steel metal plate, the volume of the single crystal alumina powder is shrunk along with gradual cooling of the stainless steel metal plate, the embedding of the single crystal alumina powder can be more compact and firm, and the process of preparing the single crystal alumina powder coating on the surface of the metal plate is finished.