Drying process for glass fiber partition plate processing

Abstract

The invention discloses a drying process for glass fiber partition plate processing, and relates to the technical field of glass fiber partition plate production, and the drying process comprises the following specific steps: S1, a raw material pretreatment stage; s2, pre-pressing forming is carried out; s3, primary drying; s4, secondary forming is carried out; s5, a deep drying stage; s6, high-temperature drying; s7, keeping at constant temperature; s8, segmented cooling is carried out; and S9, a post-treatment and detection stage. According to the drying process for processing the glass fiber partition plate, the mode of segmented heating preheating and segmented cooling is adopted, and the problems of heat waste and drying time prolonging caused by sudden temperature rise and sudden temperature drop in the traditional drying process are solved; by reasonably setting the temperature and the retention time of each temperature zone, the glass fiber partition plate can be dried more quickly and uniformly, the overall drying time is shortened by 20%-30%, and the production efficiency is greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of glass fiber separator production, in particular to a drying process for processing glass fiber separators. Background Art

[0002] Fiberglass partitions are lightweight, high-strength partition panels made from glass fiber reinforced materials. They are widely used in construction, industry, shipbuilding, rail transit, and other fields. Their core material is a composite of glass fiber and resin (such as polyester and epoxy resin). They exhibit excellent mechanical properties, corrosion resistance, and fire resistance, while also being easy to process and install.

[0003] Traditional drying technology can easily lead to uneven moisture distribution inside the partition, resulting in thermal stress, and thus quality problems such as deformation and cracking. Summary of the Invention

[0004] In view of the deficiencies in the prior art, the present invention provides a drying process for processing glass fiber separators, which solves the problems raised in the above-mentioned background technology.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: A drying process for glass fiber separator processing, comprising the following specific steps:

[0006] S1, raw material pretreatment stage, specifically including fiber opening, fiber combing, and fiber laying;

[0007] S2. Pre-pressing: The laid fiber mesh is fed into a pre-pressing machine. Pressure is applied by the upper and lower pressing plates of the pre-pressing machine to initially compact the fiber mesh and enhance the cohesion between the fibers to form a glass fiber separator blank with strength and shape. The pressure of the pre-pressing machine is set to 0.3-0.5 MPa.

[0008] S3. Preliminary drying: The pre-pressed partition blanks are fed into a preliminary drying device where low-temperature hot air circulation is used to remove moisture from the surface and interior of the blanks. Hot air enters the device through the air inlet and circulates through the box, making full contact with the partition blanks, removing moisture and discharging the moisture from the dehumidification port. The initial temperature of the hot air circulation drying box is set at 50-60°C and the drying time is about 30-40 minutes, reducing the moisture content of the blanks to 30%-40%.

[0009] S4, secondary molding, after the initial drying, the partition blank has rigidity and is sent to the molding machine again. According to the specifications and requirements of the product, precise size molding and shape processing are carried out to make the partition meet the designed shape and size standards;

[0010] S5, deep drying stage, the secondary molded partition is sent to a continuous drying furnace and preheated by a staged heating method; the drying furnace is divided into multiple temperature zones, and the partition passes through different temperature zones in sequence, and the temperature gradually increases; first entering the first temperature zone with a temperature of 60-70℃, staying for 15-20 minutes, and then entering the second temperature zone of 70-80℃, staying for 10-15 minutes, so that the partition is evenly heated to avoid deformation or cracking due to sudden temperature rise;

[0011] S6. High-temperature drying: After preheating, the partitions enter the high-temperature drying zone. The temperature in this zone is maintained at 100-120°C. The moisture inside the partitions is quickly evaporated and discharged through a combination of hot air circulation and radiation heating. The hot air circulates in the drying oven to ensure that all parts of the partitions are heated evenly. The drying time is adjusted according to the thickness and moisture content of the partitions, generally 40-60 minutes, to reduce the moisture content of the partitions to below 10%-15%;

[0012] S7. Constant temperature maintenance. After high-temperature drying, the partition enters the constant temperature zone and the temperature is maintained at 80-90°C. It stays at this temperature for 20-30 minutes to further uniformize the moisture inside the partition, eliminate the stress caused by uneven moisture distribution during the drying process, and improve the dimensional stability and physical properties of the partition;

[0013] S8, segmented cooling, the dried partitions are cooled by segmented cooling, passing through cooling zones with temperatures of 60-70°C, 40-50°C, and 20-30°C in sequence, staying in each cooling zone for 10-15 minutes, so that the partitions can be cooled slowly to avoid thermal stress caused by sudden temperature drop, which affects the quality of the partitions; cold air circulation is used during the cooling process to accelerate heat dissipation;

[0014] S9, post-processing and testing stage, specifically including surface cleaning, quality inspection, and finished product packaging.

[0015] Optionally, the fiber opening in step S1 is specifically as follows:

[0016] The bundles of glass fiber raw materials are placed on the opener. The roller and beater device of the opener are used to tear and loosen the tight fiber bundles, making them fluffy and dispersed, increasing the contact area between the fibers and the air, and laying the foundation for the subsequent drying process.

[0017] Optionally, the fiber combing in step S1 is specifically as follows:

[0018] The loosened glass fiber enters the carding machine, where the carding machine's needle cloth combs the fiber, arranges the fiber into a relatively uniform single fiber layer, removes impurities and short fibers, and makes the fiber orientation and distribution more reasonable, which is conducive to subsequent molding and drying.

[0019] Optionally, the fiber laying in step S1 is specifically as follows:

[0020] The carded fibers are evenly laid on the conveyor belt of the web forming machine through a conveying device to form a fiber web. During the laying process, the uniformity and thickness of the fiber web must be controlled to ensure the consistency of subsequent drying.

[0021] Optionally, the surface cleaning in step S9 is specifically as follows:

[0022] After cooling, the partitions enter the surface finishing equipment, where the fiber dander and dust on the surface of the partitions are removed by brushing and vacuuming, making the surface of the partitions smoother and cleaner, and improving the appearance quality of the product; at the same time, the edges of the partitions are trimmed to ensure dimensional accuracy.

[0023] Optionally, the quality inspection in step S9 is specifically as follows:

[0024] The various indicators of the partition are tested, including moisture content test (using a moisture meter, the moisture content is required to be no more than 8%), thickness test (using a micrometer, the error range is controlled within ±0.05mm), and tensile strength test (using a tensile testing machine to meet the design strength requirements), and unqualified products are screened and processed.

[0025] Optionally, the finished product packaging in step S9 is specifically as follows:

[0026] The fiberglass partitions that have passed the inspection are packaged. According to customer needs and product specifications, appropriate packaging materials are selected and the partitions are neatly packaged to prevent contamination and damage during transportation and storage.

[0027] The present invention provides a drying process for glass fiber separator processing, which has the following beneficial effects:

[0028] This drying process for glass fiber separator processing adopts a staged preheating and staged cooling method, avoiding the heat waste and extended drying time caused by sudden temperature rises and drops in the traditional drying process. By rationally setting the temperature and residence time of each temperature zone, the glass fiber separator can be dried more quickly and evenly, shortening the overall drying time by 20%-30%, greatly improving production efficiency.

[0029] By combining high-temperature drying with constant temperature maintenance, precise temperature control, and a hot air circulation system, moisture within the partitions is fully drained and evenly distributed, eliminating thermal stress and improving the partitions' dimensional stability and physical properties. Furthermore, the drying equipment's heating method and hot air circulation system have been optimized, combining hot air circulation with radiant heating to increase heat utilization and reduce heat loss. Furthermore, the staged preheating and cooling methods avoid unnecessary energy consumption. Compared with traditional drying technologies, this process reduces energy consumption by 15%-20%, lowering production costs and offering better economic and environmental benefits. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0031] Embodiment: A drying process for processing glass fiber separators includes the following specific steps:

[0032] S1, raw material pretreatment stage, specifically including fiber opening, fiber combing, and fiber laying, as follows:

[0033] Fiber opening: Place bundles of glass fiber raw materials on the opener. The roller and beater device of the opener tear and loosen the tight fiber bundles, making them fluffy and dispersed, increasing the contact area between the fiber and the air, and laying the foundation for the subsequent drying process.

[0034] Fiber combing: The loosened glass fiber enters the carding machine. The card cloth of the carding machine combs the fiber and arranges the fiber into a relatively uniform single fiber layer, removing impurities and short fibers, making the fiber orientation and distribution more reasonable, which is conducive to subsequent molding and drying;

[0035] Fiber laying: The combed fibers are evenly laid on the conveyor belt of the web forming machine through a conveying device to form a fiber web. During the laying process, the uniformity and thickness of the fiber web must be controlled to ensure the consistency of subsequent drying.

[0036] S2. Pre-pressing: The laid fiber mesh is fed into a pre-pressing machine. Pressure is applied by the upper and lower pressing plates of the pre-pressing machine to initially compact the fiber mesh and enhance the cohesion between the fibers to form a glass fiber separator blank with strength and shape. The pressure of the pre-pressing machine is set to 0.3-0.5 MPa.

[0037] S3. Preliminary drying: The pre-pressed partition blanks are fed into a preliminary drying device where low-temperature hot air circulation is used to remove moisture from the surface and interior of the blanks. Hot air enters the device through the air inlet and circulates through the box, making full contact with the partition blanks, removing moisture and discharging the moisture from the dehumidification port. The initial temperature of the hot air circulation drying box is set at 50-60°C and the drying time is about 30-40 minutes, reducing the moisture content of the blanks to 30%-40%.

[0038] S4, secondary molding, after the initial drying, the partition blank has rigidity and is sent to the molding machine again. According to the specifications and requirements of the product, precise size molding and shape processing are carried out to make the partition meet the designed shape and size standards;

[0039] S5, deep drying stage, the secondary molded partition is sent to a continuous drying furnace and preheated by a staged heating method; the drying furnace is divided into multiple temperature zones, and the partition passes through different temperature zones in sequence, and the temperature gradually increases; first entering the first temperature zone with a temperature of 60-70℃, staying for 15-20 minutes, and then entering the second temperature zone of 70-80℃, staying for 10-15 minutes, so that the partition is evenly heated to avoid deformation or cracking due to sudden temperature rise;

[0040] S6. High-temperature drying: After preheating, the partitions enter the high-temperature drying zone. The temperature in this zone is maintained at 100-120°C. The moisture inside the partitions is quickly evaporated and discharged through a combination of hot air circulation and radiation heating. The hot air circulates in the drying oven to ensure that all parts of the partitions are heated evenly. The drying time is adjusted according to the thickness and moisture content of the partitions, generally 40-60 minutes, to reduce the moisture content of the partitions to below 10%-15%;

[0041] S7. Constant temperature maintenance. After high-temperature drying, the partition enters the constant temperature zone and the temperature is maintained at 80-90°C. It stays at this temperature for 20-30 minutes to further uniformize the moisture inside the partition, eliminate the stress caused by uneven moisture distribution during the drying process, and improve the dimensional stability and physical properties of the partition;

[0042] S8, segmented cooling, the dried partitions are cooled by segmented cooling, passing through cooling zones with temperatures of 60-70°C, 40-50°C, and 20-30°C in sequence, staying in each cooling zone for 10-15 minutes, so that the partitions can be cooled slowly to avoid thermal stress caused by sudden temperature drop, which affects the quality of the partitions; cold air circulation is used during the cooling process to accelerate heat dissipation;

[0043] S9, post-processing and testing stage, specifically including surface cleaning, quality inspection, and finished product packaging, as follows:

[0044] Surface cleaning, as follows:

[0045] After cooling, the partitions enter the surface finishing equipment, where the fiber dander and dust on the surface of the partitions are removed by brushing and vacuuming, making the surface of the partitions smoother and cleaner, thereby improving the appearance quality of the product. At the same time, the edges of the partitions are trimmed to ensure dimensional accuracy.

[0046] Quality inspection, details are as follows:

[0047] Test various indicators of the separator, including moisture content (using a moisture meter, the moisture content is required to be no more than 8%), thickness (using a micrometer, the error range is controlled within ±0.05mm), and tensile strength (using a tensile testing machine to ensure that the design strength requirements are met). Unqualified products will be screened and processed;

[0048] Finished product packaging, as follows:

[0049] The fiberglass partitions that have passed the inspection are packaged. According to customer needs and product specifications, appropriate packaging materials are selected and the partitions are neatly packaged to prevent contamination and damage during transportation and storage.

[0050] Test example: It is planned to produce 100 glass fiber separators, 50 of which are produced using the traditional drying process and 50 using the process of the above embodiment. The comparison results are shown in the following table.

[0051]

[0052] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A drying process for glass fiber separator processing, characterized in that: The specific steps include: S1, raw material pretreatment stage, specifically including fiber opening, fiber combing, and fiber laying; S2. Pre-pressing: The laid fiber mesh is fed into a pre-pressing machine. Pressure is applied by the upper and lower pressing plates of the pre-pressing machine to initially compact the fiber mesh and enhance the cohesion between the fibers to form a glass fiber separator blank with strength and shape. The pressure of the pre-pressing machine is set to 0.3-0.5 MPa. S3. Preliminary drying: The pre-pressed partition blanks are sent to the preliminary drying equipment, where low-temperature hot air circulation is used to remove moisture from the surface and interior of the blanks. Hot air enters the equipment from the air inlet, circulates in the box, fully contacts the partition blanks, removes moisture, and is discharged from the dehumidification port. The initial temperature of the hot air circulation drying oven is set at 50-60°C and the drying time is about 30-40 minutes, so that the moisture content of the green body is reduced to 30%-40%. S4, secondary molding, after the initial drying, the partition blank has rigidity and is sent to the molding machine again. According to the specifications and requirements of the product, precise size molding and shape processing are carried out to make the partition meet the designed shape and size standards; S5, deep drying stage, the secondary molded partition is sent to a continuous drying furnace and preheated by a staged heating method; the drying furnace is divided into multiple temperature zones, and the partition passes through different temperature zones in sequence, and the temperature gradually increases; first entering the first temperature zone with a temperature of 60-70℃, staying for 15-20 minutes, and then entering the second temperature zone of 70-80℃, staying for 10-15 minutes, so that the partition is evenly heated to avoid deformation or cracking due to sudden temperature rise; S6. High-temperature drying: After preheating, the partitions enter the high-temperature drying zone. The temperature in this zone is maintained at 100-120°C. Through the combination of hot air circulation and radiation heating, the moisture inside the partitions is quickly evaporated and discharged; Hot air circulates in the drying oven to ensure that all parts of the partition are heated evenly. The drying time is adjusted according to the thickness and moisture content of the partition, generally 40-60 minutes, to reduce the moisture content of the partition to below 10%-15%; S7. Constant temperature maintenance. After high-temperature drying, the partition enters the constant temperature zone and the temperature is maintained at 80-90°C. It stays at this temperature for 20-30 minutes to further uniformize the moisture inside the partition, eliminate the stress caused by uneven moisture distribution during the drying process, and improve the dimensional stability and physical properties of the partition; S8, segmented cooling, the dried partitions are cooled by segmented cooling, passing through cooling zones with temperatures of 60-70°C, 40-50°C, and 20-30°C in sequence, staying in each cooling zone for 10-15 minutes, so that the partitions can be cooled slowly to avoid thermal stress caused by sudden temperature drop, which affects the quality of the partitions; cold air circulation is used during the cooling process to accelerate heat dissipation; S9, post-processing and testing stage, specifically including surface cleaning, quality inspection, and finished product packaging.

2. The drying process for glass fiber separator processing according to claim 1, characterized in that: The fiber opening in step S1 is specifically as follows: The bundles of glass fiber raw materials are placed on the opener. The roller and beater device of the opener are used to tear and loosen the tight fiber bundles, making them fluffy and dispersed, increasing the contact area between the fibers and the air, and laying the foundation for the subsequent drying process.

3. The drying process for glass fiber separator processing according to claim 1, characterized in that: The fiber combing in step S1 is specifically as follows: The loosened glass fiber enters the carding machine, where the carding machine's needle cloth combs the fiber, arranges the fiber into a relatively uniform single fiber layer, removes impurities and short fibers, and makes the fiber orientation and distribution more reasonable, which is conducive to subsequent molding and drying.

4. The drying process for glass fiber separator processing according to claim 1, characterized in that: The fiber laying in step S1 is specifically as follows: The carded fibers are evenly laid on the conveyor belt of the web forming machine through a conveying device to form a fiber web. During the laying process, the uniformity and thickness of the fiber web must be controlled to ensure the consistency of subsequent drying.

5. The drying process for glass fiber separator processing according to claim 1, characterized in that: The surface cleaning in step S9 is specifically as follows: After cooling, the partitions enter the surface finishing equipment, where the fiber dander and dust on the surface of the partitions are removed by brushing and vacuuming, making the surface of the partitions smoother and cleaner, and improving the appearance quality of the product; at the same time, the edges of the partitions are trimmed to ensure dimensional accuracy.

6. The drying process for glass fiber separator processing according to claim 1, characterized in that: The quality inspection in step S9 is specifically as follows: The various indicators of the partitions are tested, including moisture content, thickness, and tensile strength, and unqualified products are screened and processed.

7. The drying process for glass fiber separator processing according to claim 1, characterized in that: The finished product packaging in step S9 is specifically as follows: The fiberglass partitions that have passed the inspection are packaged. According to customer needs and product specifications, appropriate packaging materials are selected and the partitions are neatly packaged to prevent contamination and damage during transportation and storage.

Images