A novel sealing method for sealing the edge of a tin bath of ultrathin glass

Abstract

This invention provides a novel sealing method for ultra-thin glass tin bath edge seals, comprising the following steps: S1, filling an inner sealing layer into the transverse gaps between the tin bath breast wall and the tin bath sidewall and the edge seal, as well as the vertical gaps between adjacent edge seals; S2, applying sealing mud to the inner sealing layer, ensuring a smooth and flat sealing surface; S3, covering the sealing mud with a hard sealing layer, the hard sealing layer adhering tightly to the sealing mud; S4, applying a high-temperature resistant adhesive sealant into the narrow gaps between the hard sealing layer and the transverse and vertical gaps. This invention improves the sealing performance and high-temperature resistance of the sealing layer.

Description

Technical Field

[0001] This invention relates to the field of ultra-thin glass production technology, and in particular to a novel sealing method for sealing the edge of an ultra-thin glass tin bath. Background Technology

[0002] Currently, the sealing method for ultra-thin electronic glass solder baths basically involves the sealing surface directly contacting the exposed air surface. The large oxygen concentration difference causes oxygen to continuously diffuse into the solder bath through tiny cracks in the sealing surface, resulting in increased solder consumption and increased solder penetration, which seriously affects product quality and manufacturing costs.

[0003] The existing sealing method is as follows: the gap between the top cover of the tin bath and the side seal of the tin bath, the gap between the side wall of the tin bath and the side seal of the tin bath, and the gap between each side seal of the tin bath are all filled with sealing material; the sealing material includes aluminum silicate fiber cotton and silica cloth arranged from the inside to the outside. After filling the gap with aluminum silicate fiber cotton and silica cloth, the side of the silica cloth that is in contact with the air outside the tin bath is coated with sealing mud.

[0004] However, after sealing using this method, the sealing surface comes into contact with air more, and the sealing effect at the gaps on the surface of the sealing surface is difficult to guarantee, so the actual sealing effect cannot be effectively controlled. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a novel sealing method for ultra-thin glass tin bath edge sealing, which solves the problem of poor sealing performance in existing technologies.

[0006] According to an embodiment of the present invention, a novel sealing method for ultra-thin glass tin bath edge sealing includes the following steps:

[0007] S1. Fill the transverse gaps between the tin bath breast wall and the tin bath sidewall and the side seals, as well as the vertical gaps between adjacent side seals, with an inner sealing layer.

[0008] S2. Apply sealing putty to the inner sealing layer and ensure that the sealing surface is flat and smooth;

[0009] S3. Continue to cover the sealant with a hard sealant layer, ensuring the hard sealant layer adheres tightly to the sealant layer;

[0010] S4. Apply a high-temperature resistant adhesive sealant to the gaps between the hard sealing layer and the transverse and vertical gaps to form an outer sealing layer.

[0011] Preferably, in step S1: aluminosilicate fiber cotton wrapped in silica cloth is inserted into the transverse and vertical gaps.

[0012] Preferably, in step S1: a 3mm thick silica cloth and a 25mm thick aluminum silicate fiber cotton are selected, flattened and compacted with a stainless steel hook, and the sealing mud is evenly applied to the surface.

[0013] Preferably, in step S2, the thickness of the sealing mud is about 10 mm.

[0014] Preferably, in step S2: after the sealing mud dries, the cracks in the sealing mud are inspected and then repaired. A total of two inspections and repairs are performed.

[0015] Preferably, in step S3: the rigid sealing layer is made of aluminum plate, which is cut to a width that matches the horizontal and vertical gaps, and then filled into the horizontal and vertical gaps.

[0016] Preferably, in step S4: the high-temperature viscous sealing material is a mixture of high-temperature sealant and sealant putty.

[0017] Preferably, in step S4: the amount of sealing mud added to the high-temperature viscous sealing material is inversely proportional to the distance between the adhesion part and the tin bath edge pulling machine.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. By using different sealing layers and different sealing methods, the sealing performance of the tin bath can be effectively improved.

[0020] 2. Four sealing layers are set up to effectively reduce the contact area between the sealing surface and the air. High-temperature sealant and sealing mud with different proportions are selected to increase the density of the sealant mixture, avoid cracking and lifting of the seal in different temperature areas, and thus effectively prevent the molten solder in the solder bath from being contaminated. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention without the sealing layer installed.

[0022] Figure 2 This is a schematic diagram of the structure of the inner sealing layer in an embodiment of the present invention.

[0023] Figure 3 This is a schematic diagram of the structure of the outer sealing layer in an embodiment of the present invention.

[0024] In the above attached figures: 1. Tin bath breast wall; 2. Tin bath side wall; 3. Horizontal gap; 4. Side seal; 5. Vertical gap; 6. Inner sealing layer; 7. Aluminum plate; 8. Outer sealing layer. Detailed Implementation

[0025] The technical solutions of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0026] like Figure 1-3 As shown, a novel sealing method for ultra-thin glass tin bath edge sealing is proposed.

[0027] A novel sealing method for ultra-thin glass tin bath edge sealing includes the following steps:

[0028] S1. Fill the transverse gap 3 between the tin bath breast wall 1 and the tin bath side wall 2 and the side seal 4, and the vertical gap 5 between adjacent side seals 4 with an inner sealing layer 6.

[0029] S2. Apply sealing putty to the inner sealing layer 6 and ensure that the sealing surface is flat and smooth;

[0030] S3. Continue to cover the sealant with a hard sealant layer, ensuring the hard sealant layer adheres tightly to the sealant layer;

[0031] S4. Apply a high-temperature resistant adhesive sealant to the gaps between the hard sealing layer and the transverse and vertical gaps to form an outer sealing layer 8.

[0032] Silicone cloth is used to wrap aluminum silicate fiber cotton and stuff it into the transverse gap 3 and vertical gap 5.

[0033] In step S1: Select a 3mm thick silica cloth and a 25mm thick aluminum silicate fiber cotton, press them flat and compact them with a stainless steel hook, and evenly apply the sealing mud to the surface.

[0034] In step S2: the thickness of the sealing mud is approximately 10 mm.

[0035] In step S2: After the sealant has dried, check the cracks in the sealant and repair them. This process is repeated twice.

[0036] In step S3: the hard sealing layer is made of aluminum plate 7. The aluminum plate 7 is cut to a width that matches the width of the horizontal gap 3 and the vertical gap 5, and the aluminum plate 7 is filled into the horizontal gap 3 and the vertical gap 5.

[0037] In step S4: the high-temperature viscous sealing material is a mixture of high-temperature sealant and sealant putty.

[0038] The amount of sealing mud added to the high-temperature viscous sealing material is inversely proportional to the distance between the adhesion part and the tin bath edge pulling machine. This method can effectively reduce the contact area between the sealing surface and the air surface. Mixing high-temperature sealant and sealing mud in different proportions increases the density of the sealant mixture, avoids cracking and lifting of the seal in different temperature areas, and effectively controls the contamination of the tin liquid in the tin bath.

[0039] To achieve the above objectives, the technical solution adopted by the present invention is as follows: Through this sealing method, an aluminum plate is attached to the surface of the first sealing surface, reducing the contact area between the sealing surface and the air surface by about 90%. At the same time, according to the temperature range of the tin bath in which each sealing area is located, high-temperature sealant and sealing mud are mixed in different proportions to increase the density of the sealant mixture. The mixture is then evenly applied to the remaining 10% of the sealing surface to achieve the purpose of controlling the cleanliness of the tin bath.

[0040] The specific method is as follows: First, use appropriately sized silica cloth to wrap aluminum silicate fiber cotton at the gap of the tin bath edge seal, stuff it in and compact it; second, use sealing mud to seal, ensuring the sealing surface is flat and smooth, with a sealing mud thickness of about 10mm; after the sealing mud dries, check and reinforce the cracked areas twice; third, first measure the width and length of the gaps between each edge seal and between the edge seal and the tin bath, cut an appropriately sized aluminum plate, and attach the aluminum plate on top of the second layer; at this time, perform the fourth layer of sealing, using a mixture of high-temperature sealant and sealing mud or high-temperature sealant to seal the small gaps at the connection between aluminum plates and between the aluminum plate and the tin bath body, and reinforce the cracked areas once after the seal dries.

[0041] Experimental verification shows that the amount of high-temperature sealant used in the fourth layer of sealing and the mixing ratio of sealing mud are closely related to the temperature of the solder bath. In the area before the solder bath edge-pulling machine, the temperature inside the solder bath is above 900℃. Using only high-temperature sealant will cause it to peel off under high temperature, resulting in no desired sealing effect. Therefore, a mixture of sealant and sealing mud (400ml high-temperature sealant + 2.5kg sealing mud) is needed here, achieving a good sealing effect. The temperature in the area before the solder bath edge-pulling machine is about 80℃ lower than the area before the machine. Therefore, a mixture of sealant and sealing mud (600ml high-temperature sealant + 2.5kg sealing mud) is needed here. In the area after the edge-pulling machine, the temperature is further reduced. This area is sealed using pure high-temperature sealant. After this new sealing method, the overall sealing of the solder bath is improved.

[0042] Referring to the accompanying drawings, the implementation of the present invention is as follows: after sealing is completed by the above method, the H2 content at each sealing point of the tin bath is detected by a high-sensitivity H2 detector. The H2 concentration is significantly reduced, and the sealing performance is significantly enhanced.

[0043] Case 1: Because a large amount of N2 and H2 are introduced into the tin bath, the tin bath sealing test method uses a high-sensitivity H2 detector (unit: ppm, measurement range: 0-5000ppm). The probe is placed 5mm away from the outermost seal to measure the H2 content.

[0044] The measurement data before the sealing method was optimized are as follows:

[0045]

[0046] Detection point 1

[0047]

[0048] Detection point 2

[0049]

[0050] Detection point 3

[0051] The above measurement data shows that using traditional sealing methods, minute gaps on the sealing surface are not easily detected, and frequent reinforcement does not result in significant improvement. The H2 concentration at the sealing point is significantly high, the solder bath has poor sealing performance, and the solder liquid is seriously contaminated.

[0052] The measurement data after optimizing the sealing method are as follows:

[0053]

[0054] Detection point 1

[0055]

[0056] Detection point 2

[0057]

[0058] Detection point 3

[0059] The data above shows that the sealing effect is good after using this method, which effectively ensures the cleanliness of the solder bath and reduces solder contamination.

[0060] Case 2: Before and after using this method, the sealing performance of the solder bath was significantly improved, and the amount of solder penetration on the lower surface of the glass was significantly improved (taking a 0.33mm product as an example). The data is as follows:

[0061]

[0062] The amount of solder absorbed into the product is a significant factor affecting solder consumption in the solder bath and warping during subsequent deep processing and tempering. Strengthening the solder bath seal further ensures the cleanliness of the solder bath, reduces the amount of solder absorbed into the product, and effectively improves product quality.

Claims

1. A novel sealing method for ultra-thin glass tin bath edge seal, characterized in that, Includes the following steps: S1. Fill the transverse gap (3) between the tin bath breast wall (1) and the tin bath side wall (2) and the side seal (4) and the vertical gap (5) between adjacent side seals (4) with an inner sealing layer (6). S2. Apply sealing mud to the inner sealing layer (6) and ensure that the sealing surface is flat and smooth; S3. Continue to cover the sealant with a hard sealant layer, ensuring the hard sealant layer adheres tightly to the sealant layer; S4. Apply a high-temperature resistant adhesive sealant to the gaps between the hard sealing layer and the transverse and vertical gaps to form an outer sealing layer (8). In step S3: the hard sealing layer is made of aluminum plate (7), the aluminum plate (7) is cut to a width that matches the transverse gap (3) and the vertical gap (5), and the aluminum plate (7) is filled into the transverse gap (3) and the vertical gap (5); In step S4: the high-temperature viscous sealing material is a mixture of high-temperature sealant and sealing putty; In step S4: the amount of sealing mud added to the high-temperature viscous sealing material is inversely proportional to the distance between the adhesion part and the tin bath edge pulling machine. 2.The novel sealing method for sealing the edge of a tin bath of ultra-thin glass according to claim 1, wherein In step S1: Silicone cloth is used to wrap aluminum silicate fiber cotton and stuff it into the transverse gap (3) and vertical gap (5).

3. The novel sealing method for ultra-thin glass tin bath edge sealing as described in claim 2, characterized in that, In step S1: Select a 3mm thick silica cloth and a 25mm thick aluminum silicate fiber cotton, press them flat and compact them with a stainless steel hook, and evenly apply the sealing mud to the surface. 4.The novel sealing method for sealing the edge of a tin bath of ultra-thin glass according to claim 1, wherein In step S2: the thickness of the sealing mud is approximately 10 mm.

5. The novel sealing method for the edge sealing of the tin bath of the ultra-thin glass according to claim 1, characterized in that, In step S2: After the sealant has dried, check the cracks in the sealant and repair them. This process is repeated twice.

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