CN102788229A - Method for manufacturing a uniform-density vacuum insulated panel with high production efficiency - Google Patents

Abstract

A method for manufacturing a vacuum insulation panel with uniform density and high production efficiency, comprising the steps of: (1) using a bag making machine to make a non-woven bag of a specified size, leaving one side unsealed; (2) pouring the core material into the non-woven bag (3) Use a leveling machine to spread the core material in the non-woven fabric evenly in the non-woven fabric; (4) The conveyor belt is sent to the compactor to compact the core material; (5) The core material Put the material into the air-blocking bag, vacuumize to 0.02pa on the vacuum equipment and seal it. The advantages of the present invention are: weighing and bagging ensures the accuracy of product specifications; the leveling equipment uses gravity to distribute the core material in the non-woven bag, making the distribution more uniform and smooth; the core material is packed into non-woven bags. After the woven bag is reshaped and compacted, it avoids the easy damage to the corners of the core material when the core is compacted and reshaped first, and then the core material is wrapped with non-woven fabric, which improves the yield of finished products; this method is suitable for automatic production, which greatly improves the production efficiency. efficiency.

Description

A method for manufacturing a vacuum insulation panel with uniform density and high production efficiency

technical field

The invention relates to a method for manufacturing a vacuum heat insulation panel. The produced vacuum heat insulation panel is mainly used for heat insulation and heat preservation of building materials, household appliances, pipelines and other equipment.

Background technique

The existing manufacturing process of the vacuum insulation panel is as follows: the core material is injected into a mold and pressed into a mold, wrapped with non-woven fabric, bagged and sealed, and vacuumized. This method cannot ensure the uniformity of the core material when it is pressed and formed in the mold, and the density of the pressed core material is not uniform; when the core material is wrapped with non-woven fabric, it is easy to damage the edge molding of the core material and reduce the yield ; The degree of automation is not high, more personnel are needed, and the production efficiency is lower.

Contents of the invention

The purpose of the present invention is to provide a method for making a vacuum insulation panel with uniform density and high production efficiency, so as to solve the problems in the prior art that the core material cannot be laid evenly when pressed in a mold, and the core material after pressing The density is uneven; when the core material is wrapped with non-woven fabric, it is easy to damage the edge molding of the core material, reducing the yield; and the problem of low automation and low production efficiency.

The technical solution of the present invention is: a method for manufacturing a vacuum insulation panel with uniform density and high production efficiency, which is characterized in that it includes the following process steps:

(1) Use a bag making machine to make a non-woven bag of a specified size, seal three sides, and leave one side unsealed;

(2) Weighing and bagging: the core material is weighed and poured into the non-woven bag according to the formula, and the unsealed side of the non-woven bag is sealed;

(3) Lay the non-woven fabric bag on the leveling machine in the forward direction, and the leveling machine will evenly spread the core material in the non-woven fabric in the non-woven fabric during the process of transporting the non-woven fabric with the core material;

(4) The conveyor belt is sent into the compactor to compact the core material;

(5) Put the core material into the air-blocking bag, vacuumize it to 0.02pa-200pa on the vacuum equipment, and then seal it.

The sealing in the step (1) adopts the way of ultrasonic sealing.

The parts by weight of each component of the core material are: ultrafine silica powder 18-71, filler 0-53, inorganic core material 0-41, inorganic fiber 1-18, getter 0-3 , Vacuum stabilizer 0-2.8.

The ultrafine silica powder is a mixture of one or more of silica fume, silica fume, volcanic ash, microsilica powder, silica powder, and perlite powder, and its bulk density is 130-280kg/ ^m3 , the specific surface area is 15-29m ² /g, and the average particle diameter is 0.1-2 microns; the vacuum stabilizer is a hollow adsorption material, and the average inner diameter is 0.1-3 microns.

The filler is fly ash, expanded perlite, densely porous perlite, vitrified microspheres, sawdust, sawdust, crushed crop straw, shredded paper, glass wool scraps, foam, rock wool shredded fibers, One or more mixtures of polystyrene particles, dried sludge, diatomaceous earth, ultrafine glass wool, centrifugal glass wool, and rock wool; the inorganic core material is airgel, gas phase dioxide One or more mixtures of silicon and precipitated silica.

The inorganic fiber is a mixture of one or more of glass fiber chopped strands, ultra-fine glass wool, flame wool, aluminum silicate wool, ceramic fiber cotton, brucite fiber, and foam, and its length is 3 -12mm, the fiber diameter is 0.2-13 microns.

The getter is one or more mixtures of activated carbon, barium-lithium alloy activator, calcium oxide, magnesium oxide, and silica gel; the vacuum stabilizer is silicon carbide or ultrafine fiber activated carbon material or a mixture of the two.

The air barrier bag is made of aluminum foil, polyester film, nylon film, polyethylene film, polyvinyl chloride film, polystyrene film, polyvinylidene chloride, polyvinyl alcohol film, ethylene-vinyl acetate copolymer film, poly It is composed of one or more of vinyl alcohol film, nylon film, ethylene/vinyl alcohol copolymer film, polycarbonate film and polypropylene; The unsealed end is sealed. the

The outermost side of the high gas barrier film is provided with a protective layer, which is mainly composed of one or more of glass fiber cloth, non-woven fabric, carbon fiber woven cloth, basalt fiber cloth and ceramic fiber cloth.

Both ends of the high-barrier air-resistance film bag are provided with edge seals, which are arranged on the opposite side of the two ends of the high-barrier air-barrier film bag, and on the other side opposite to the edge seal. Anastomotic occlusal groove.

The advantages of the present invention are: weighing and bagging ensures the stability of product specifications; the leveling equipment uses gravity to distribute the core material in the non-woven bag, making the distribution more uniform and smooth; After the non-woven bag is reshaped and compacted, it avoids the corner molding of the core material that is easy to be damaged when the core is compacted and reshaped first, and then the core material is wrapped with non-woven fabric, which improves the yield of finished products; this method is suitable for automatic production, and the degree of equipment automation High, such an assembly line only needs six employees, replacing the previous production line of nearly 30 people, greatly improving production efficiency. The use of sawdust, wood chips or crop straw and other materials, waste utilization, solves the problem of disposal of these wastes, and at the same time can reduce the production cost of the core material, and at the same time, due to the porous and loose texture of the wood fiber, it can well maintain the extreme of the vacuum insulation panel. Low thermal conductivity. The interlacing of inorganic fibers can increase the internal stress of the core material and enhance the strength of the core material. Ultrafine silica itself has extremely low thermal conductivity, and because of its loose molecular structure, it can absorb the residual gas in the gas barrier bag while ensuring low thermal conductivity, ensuring the stability of the high vacuum in the gas barrier bag. the

Description of drawings

Fig. 1 is the structural schematic view (view of one side) of the vacuum insulation panel made by the present invention;

Fig. 2 is a schematic structural view (view from one side) of another vacuum insulation panel embodiment of the present invention;

Fig. 3 is the top view of Fig. 1;

Fig. 4 is a schematic diagram of docking when the present invention is applied.

Detailed ways

A method for manufacturing a vacuum insulation panel with uniform density and high production efficiency according to the present invention is characterized in that it comprises the following process steps:

(1) Use a bag making machine to make a non-woven bag of a specified size, seal three sides, and leave one side unsealed. The sealing adopts the method of ultrasonic sealing. A machine that uses ultrasonic concentrators to act on the sealing part of the packaging container to seal the packaging container. Ultrasonic energy is transmitted to the welding area through the upper weldment. Due to the large acoustic resistance in the welding area, that is, the interface between the two welds, local high temperature will be generated. Due to the poor thermal conductivity of the non-woven fabric, it cannot be dissipated in time for a while, and it gathers in the welding area, causing the contact surface of the two non-woven fabrics to melt rapidly, and after a certain pressure is applied, it is fused into one. When the ultrasonic wave stops working, let the pressure continue for a few seconds to make it solidify and form, thus forming a strong molecular chain to achieve the purpose of welding, and the welding strength can be close to the strength of the raw material. No adhesive is required.

(2) Weighing and bagging: according to the formula, the core material is weighed with an electronic scale and poured into a non-woven bag, and the unsealed side of the non-woven bag is sealed.

The parts by weight of each component of the core material are: ultrafine silica powder 18-71, filler 0-53, inorganic core material 0-41, inorganic fiber 1-18, getter 0-3 , Vacuum stabilizer 0-2.8.

The ultrafine silica powder is a mixture of one or more of silica fume, silica fume, volcanic ash, microsilica powder, silica powder, and perlite powder, and its bulk density is 130-280kg/ ^m3 , The specific surface area is 15-29m ² /g, and the average particle size is 0.1-2 microns.

The vacuum stabilizer is a hollow adsorption material with an average inner diameter of 0.1-3 microns.

The filler is fly ash, expanded perlite, densely porous perlite, vitrified microspheres, sawdust, sawdust, crushed crop straw, shredded paper, glass wool scraps, foam, rock wool shredded fibers, One or more mixtures of polystyrene particles, dried sludge, diatomaceous earth, ultrafine glass wool, centrifugal glass wool, and rock wool; the inorganic core material is airgel, gas phase dioxide One or more mixtures of silicon and precipitated silica.

The inorganic fiber is a mixture of one or more of glass fiber chopped strands, ultra-fine glass wool, flame wool, aluminum silicate wool, ceramic fiber cotton, brucite fiber, and foam, and its length is 3 -12mm, the fiber diameter is 0.2-13 microns.

The getter is one or a mixture of activated carbon, barium-lithium alloy activator, calcium oxide, magnesium oxide, and silica gel.

The vacuum stabilizer is silicon carbide or ultrafine fiber activated carbon material or a mixture of the two.

(3) Lay the non-woven bag on the leveling machine in the forward direction. During the process of transporting the non-woven fabric with the core material, the leveling machine evenly spreads the core material in the non-woven bag in the non-woven fabric . Leveling machine is prior art.

(4) Send the flattened non-woven bag with the core material into the compactor with a conveyor belt, and compact the core material to become a core material. The compactor is prior art.

(5) Put the above-mentioned core material into the air-blocking bag, vacuumize it to 0.02pa on the vacuuming equipment and seal it.

The air barrier bag is made of aluminum foil, polyester film, nylon film, polyethylene film, polyvinyl chloride film, polystyrene film, polyvinylidene chloride, polyvinyl alcohol film, ethylene-vinyl acetate copolymer film, poly It is composed of one or more of vinyl alcohol film, nylon film, ethylene/vinyl alcohol copolymer film, polycarbonate film and polypropylene; one end of the air-blocking bag is not sealed, and it is put into the core material and vacuumized. Its sealed. the

The outermost side of the high gas barrier film is provided with a protective layer, which is mainly composed of one or more of glass fiber cloth, non-woven fabric, carbon fiber woven cloth, basalt fiber cloth and ceramic fiber cloth.

Referring to Fig. 1-Fig. 4, the outer structure of the vacuum insulation panel made by the present invention can be a conventional shape, and a sealing edge 3 is provided between the two ends of the high gas barrier film bag 1 (see Fig. 1). It is also possible to set the sealing edge 3 at both ends of the high-barrier gas film bag 1 on the opposite side of the two ends of the high-barrier gas film bag 1, and the other side opposite to the sealing edge 3 is provided with a occlusal groove matching the edge sealing 4. During construction, two adjacent insulation boards A1 and A2 are placed in the occlusal groove 4 of the other side (as shown in Figure 4), which reduces the thickness of the thermal bridge between the two adjacent insulation boards and improves Improve the insulation effect and construction efficiency.

Claims (10)

1. A density evenly, the making method of the vacuum heat-insulating plate of high efficiency, it is characterized in that, comprise following process step:

   (1) with the nonwovens sack of pouch machine manufacturing specification size, open-ended is on one side stayed on the inside back cover limit;

   (2) pack of weighing: core material weighed according to prescription to pour in the non-woven bag, one side seal non-woven bag is unsealed;

   (3) non-woven bag forward is tiled on the flat-bed machine of top, the top flat-bed machine is evenly paved the core material in the nonwovens in nonwovens in the process of transporting the nonwovens that core material is housed;

   (4) line belt is sent into compactor, with the core material compacting;

   (5) core is packed in the choke bag, after being evacuated to 0.02pa-200pa on the vaccum-pumping equipment, seal.
2. 2. density according to claim 1 evenly, the making method of the vacuum heat-insulating plate of high efficiency, it is characterized in that, seal the mode that adopts ultrasound to seal in the described step (1).
3. 3. density according to claim 1 is even, the making method of the vacuum heat-insulating plate of high efficiency; It is characterized in that the parts by weight of described each composition of core material are: superfine silicon dioxide powder 18-71, stuffing 0-53; Inorganic core material 0-41; Inorfil 1-18, getter 0-3, vacuum stabilizer 0-2.8.
4. 4. density according to claim 3 is even, the making method of the vacuum heat-insulating plate of high efficiency; It is characterized in that: said superfine silicon dioxide powder is one or more the mixture in silica flour, silicon ash, volcanic ash, SILICA FUME, SiO 2 powder, the perlite powder, and its packing density is 130-280kg/m ³, specific surface area is 15-29m ²/ g, Mean particle diameter is the 0.1-2 micron; Said vacuum stabilizer is the hollow sorbing material, and mean inside diameter is the 0.1-3 micron.
5. 5. density according to claim 3 evenly, the making method of the vacuum heat-insulating plate of high efficiency, it is characterized in that: said stuffing is one or more the mixture in the mud, silicious marl, super glass wool, centrifugally glass-wool, rock wool of pulverized fuel ash, expanded perlite, closed perlite, glass bead, sawdust, wood chip, crop stalk ground product, shredded paper bits, glass wool chip, foam, rock wool debris, granules of polystyrene, drying; Described inorganic core material is one or more a mixture of aerogel, aerosil, precipitated silica.
6. 6. density according to claim 3 is even, the making method of the vacuum heat-insulating plate of high efficiency; It is characterized in that: said inorfil is one or more the mixture in glass chopped silk, super glass wool, flame cotton, aluminium silicate wool, ceramic fiber cotton, brucite fiber, the foam; Its length is 3-12mm, and fiber diameter is the 0.2-13 micron.
7. 7. density according to claim 3 evenly, the making method of the vacuum heat-insulating plate of high efficiency, it is characterized in that: said getter is one or more the mixture in active carbon, barium lithium alloy activator, calcium oxide, magnesia, the silica gel; Described vacuum stabilizer is Carborundum or superfine fibre active carbon material or the mixture of the two.
8. 8. density according to claim 1 is even, the making method of the vacuum heat-insulating plate of high efficiency; It is characterized in that described choke bag is composited by aluminium foil, polyester film, nylon film, polyethylene film, polyvinyl chloride film, polystyrene film, polyvinylidene chloride, polyvinyl alcohol film, ethylene-vinyl acetate copolymer film, polyvinyl alcohol film, nylon film, ethylene/vinyl alcohol copolymer film, polycarbonate film and polyacrylic one or more; One end of choke bag does not seal, should a unsealed end closure after the core material of packing into vacuumizes.
9. 9. density according to claim 8 is even, the making method of the vacuum heat-insulating plate of high efficiency; It is characterized in that: said high resistant air film outermost is provided with protective layer, and this protective layer mainly is composited by one or more of glass cloth, nonwovens, carbon-fiber cloth, basalt fiber cloth and ceramic fiber cloth.
10. 10. density according to claim 1 is even, the making method of the vacuum heat-insulating plate of high efficiency; It is characterized in that: the two ends at described high resistant air film bag are provided with edge sealing; This edge sealing is located at the relative one side at the two ends of this high resistant air film bag, is provided with the occlusal crib that coincide with this edge sealing at the another side relative with this edge sealing.

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