CN107498929A - A kind of processing method and its device of aluminium foil composite glass fiber paper - Google Patents

Abstract

The invention discloses a kind of processing method and its device of aluminium foil composite glass fiber paper, using the device by after shaping and the all-glass paper under the moisture state through polyester material work out made of conveyer belt transmit, during which punctured and punched to all-glass paper in transmission belt surface by porcupine roller；Again by all-glass paper by vacuum tank suction excessive moisture, then successively through prolonging pressure roller, baking oven for a pair, then it is compound with aluminium foil and wind.The device and its processing method are punctured by porcupine roller, prolong two layers of physical technology of pressure roller excipient, while increasing all-glass paper toughness, change its surface configuration, make its all-glass paper in winding that to there is more gap in adjacent two layers aluminium foil, the significant increase effect being sucked by vacuum；The other device can be configured directly in the downstream of glass fibre paper conversion, with the disposable composite molding of aluminum foil coil, it is not necessary to carry out again it is cumbersome unreel, be compound, wrapup routine, avoid excessive operation from causing all-glass paper to damage.

Description

A processing method and device for aluminum foil composite glass fiber paper

technical field

The invention relates to the field of material processing, in particular to a processing method and device for an aluminum foil composite glass fiber paper used for LNG cryogenic insulation.

Background technique

Natural gas is a clean energy. The greenhouse gases produced by burning natural gas are only 1/2 of that of coal and 2/3 of that of oil, and the pollution to the environment is far less than that of oil and coal. Therefore, accelerating the development and rational use of natural gas can effectively improve the atmospheric environment and promote the realization of emission reduction goals. Global climate change will increase the demand for natural gas and bring opportunities for the development of natural gas and LNG (liquefied natural gas) industries.

LNG is condensed into a liquid by cooling the gaseous natural gas at normal pressure to -162°C. After the natural gas is liquefied, it can greatly save storage and transportation space. At present, the gas cylinders and storage tanks used in the LNG industry mostly adopt multi-layer insulation technology. This technology uses multi-layer insulation materials to wrap the bottle liner to a certain thickness, and then cover the outer shell to vacuumize. The method realizes a heat insulating layer with low thermal conductivity, reduces the evaporation rate of cryogenic liquid, and its thermal conductivity is lower than 0.0015W/m·K.

Multi-layer heat insulation technology generally adopts the method of compounding heat-insulating paper and aluminum foil paper. In actual production, the aluminum foil paper roll and the heat-insulating paper roll need to be unrolled separately, and then compounded and rewound. For the thermal insulation paper with relatively fragile material, the unwinding and compounding process can easily cause the thermal insulation paper to break and damage, and the staff have to suspend processing and adjust the winding, which makes it difficult to guarantee the production efficiency and the product yield is insufficient.

On the other hand, existing products directly compound thermal insulation paper and aluminum foil paper. Due to the flat and smooth surface of the paper, part of the air trapped in the paper roll cannot be removed during the vacuum suction process, which directly affects the thermal insulation performance of LNG.

Contents of the invention

Purpose of the invention: The purpose of the present invention is to provide a processing device for one-time rewinding and compounding of aluminum foil composite glass fiber paper. Another purpose of the present invention is to provide a method for producing high-efficiency vacuumized aluminum foil composite glass fiber paper using the processing device.

Technical solution: In order to achieve the purpose of the above invention, a processing device for aluminum foil composite glass fiber paper according to the present invention includes a glass fiber paper conveying device, an aluminum foil unwinding device, an expanding roller, and a winding device, and the glass fiber paper conveying The device is equipped with a needle roller for piercing the glass fiber paper.

Further, an oven is provided between the conveyor belt and the expanding roller.

Further, a vacuum box connected to a negative pressure source is provided under the conveyor belt. The cooperation of the vacuum box and the oven can effectively remove the moisture in the glass fiber paper and make it rapid prototyping.

Further, a pair of calendering rollers is provided between the oven and the conveyor belt, and the surfaces of the pair of calendering rollers are provided with intermeshing concave-convex structures. The calender roller is used to form a concave-convex structure on the glass fiber paper to form an air channel between the glass fiber paper and the aluminum foil after it is rolled, so that the air inside the glass fiber paper and aluminum foil is conveniently pumped when the gas cylinder or storage tank is evacuated. Off, on the other hand, reduces the contact thermal resistance between glass fiber paper and aluminum foil.

Wherein, perforated needles with a diameter of no more than 0.2 cm are arranged on the surface of the needle roller, and the density of the perforated needles is 50-70 needles/cm ² .

Preferably, the winding device further includes a cutting knife for cutting the burrs on both sides before winding.

For the method of processing aluminum foil composite glass fiber paper using the aforementioned device in the present invention, the glass fiber paper in the wet state after molding is conveyed through the conveyor belt, during which the needle roller is used to puncture and punch the glass fiber paper on the surface of the conveyor belt; The excess water in the glass fiber paper is sucked away by the box, and then passed through a pair of calendering rollers, an oven, and then compounded with aluminum foil and rolled.

The water content of the glass fiber paper in the wet state is not more than 80% by mass percentage after being sucked by a vacuum box, and not more than 0.5% by mass percentage after being dried in an oven.

The hole diameter of the needle roller is not more than 0.2cm.

Beneficial effects: the processing device and its processing method of the present invention increase the toughness of the glass fiber paper and change its surface shape through the two-layer physical process of needle roller puncture and calender roller shaping, so that the glass fiber paper is rolled There are more gaps in the two adjacent layers of aluminum foil, which greatly improves the effect of vacuum suction; in addition, the device can be directly configured in the downstream of glass fiber paper processing, and it can be compositely formed with aluminum foil rolls at one time, without the need for cumbersome Unwinding, compounding, and winding procedures to avoid damage to glass fiber paper caused by excessive operations.

Description of drawings

Fig. 1 is the structural representation of embodiment 1 of the present invention;

Fig. 2 is a schematic structural view of a calendering roll in Example 1 of the present invention.

detailed description

The present invention will be further described below in conjunction with specific examples.

Example 1

As shown in Figure 1, a processing device for aluminum foil composite glass fiber paper is located downstream of the glass fiber paper processing equipment. The device includes a conveyor belt 1 for conveying glass fiber paper, an aluminum foil unwinding device 2, an expanding roller 3, a winding device 4, and a slitting knife 5. The surface of the conveyor belt 1 is provided with a needle roller 6 adjacent to it. The surface of the needle roller 6 is arranged with punching pins with a diameter not exceeding 0.2 cm, and the density of the punching pins is 50-70 pins/cm ² .

The conveyor belt 1 has a mesh structure, and an oven 7 is provided between the conveyor belt 1 and the expander roll 3 . Below the conveyor belt 1 is provided with a vacuum box 8 connected to a negative pressure source. The cooperation of the vacuum box 8 and the oven 7 realizes the efficient removal of moisture in the glass fiber paper, making it rapid prototyping. As an embodiment, as shown in FIG. 2 , a pair of calendering rollers 9 are provided between the oven 7 and the conveyor belt 1 , and the surfaces of the pair of calendering rollers 9 are provided with intermeshing concave-convex structures.

The glass fiber and aluminum foil composite thermal insulation paper produced by this device has been verified to shorten the vacuuming time after winding on the ultra-low temperature gas cylinder compared with the composite thermal insulation paper produced by the device without needle rollers and calender rollers. 20-30%.

Example 2

As shown in Figure 1, a processing method of aluminum foil composite glass fiber paper is to convey the glass fiber paper 11 after molding and in a wet state through the conveyor belt 1, during which the needle roller 6 is used to puncture the glass fiber paper 11 on the surface of the conveyor belt. Punching; the glass fiber paper 11 is passed through a vacuum box to absorb excess water, and then passed through a pair of calendering rollers 9 and an oven 7 in sequence, and then compounded with aluminum foil 10 and wound up. When in use, it is placed between the LNG inner tank and the outer tank, usually wound between 30-40 layers.

Among them, the water content of the glass fiber paper in a wet state is not more than 80% by mass percentage after being sucked by a vacuum box, and not more than 0.5% by mass percentage after being dried in an oven. The diameter of the hole punched by the needle roller is not more than 0.2cm.

The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made. It should be regarded as the protection scope of the present invention.

Claims (9)

1. A kind of 1. processing unit (plant) of aluminium foil composite glass fiber paper, it is characterised in that：The device includes all-glass paper transmission dress Put, aluminium foil unwinding device, spreading roll and wrap-up, the glass fibre paper transporting apparatus are provided with for puncturing glass fibers Tie up the porcupine roller of paper.
2. A kind of 2. processing unit (plant) of aluminium foil composite glass fiber paper according to claim 1, it is characterised in that：The transmission Baking oven is provided between band and spreading roll.
3. A kind of 3. processing unit (plant) of aluminium foil composite glass fiber paper according to claim 1 or 2, it is characterised in that：It is described The vacuum tank of connection negative pressure source is provided with below conveyer belt.
4. A kind of 4. processing unit (plant) of aluminium foil composite glass fiber paper according to claim 3, it is characterised in that：The baking oven Prolong pressure roller provided with a pair between conveyer belt, the pair of roller surface that prolongs is provided with intermeshing concaveconvex structure.
5. A kind of 5. processing unit (plant) of aluminium foil composite glass fiber paper according to claim 4, it is characterised in that：The porcupine roller Surface is placed with the perforating needle that diameter is no more than 0.2cm, and the density of perforating needle is 50~70 pins/cm²。
6. A kind of 6. processing unit (plant) of aluminium foil composite glass fiber paper according to claim 5, it is characterised in that：The winding Device also includes being used for the carving knife for cutting both sides flash before winding.
7. 7. utilize the method for device as claimed in claim 4 processing aluminium foil composite glass fiber paper, it is characterised in that：After being molded And the communicated band transmission of all-glass paper under moisture state, belt surface is during which being transmitted to all-glass paper by porcupine roller Puncture punching；Fall moisture unnecessary in all-glass paper through vacuum tank suction again, then prolong pressure roller, baking oven through a pair successively, then It is compound with aluminium foil and wind.
8. 8. according to the method for claim 7, it is characterised in that：All-glass paper under the moisture state is taken out through vacuum tank Water content is no more than 80% by mass percentage after water suction point, and water content is no more than by mass percentage after oven for drying 0.5%.
9. 9. according to the method for claim 8, it is characterised in that：The porcupine roller punching diameter is no more than 0.2cm.