Tertiary strengthening method of toughened glass

Abstract

The invention relates to the technical field of toughened glass strengthening methods, and discloses a three-time strengthening method of toughened glass, which comprises the following steps: (1) cutting: cutting a large piece of glass into small pieces of glass; (2) CNC forming is carried out; (3) primary strengthening treatment: performing chemical etching to reduce the thickness of the small pieces of glass by 30-40 [mu] m; (4) polishing the small pieces of glass; (5) secondary strengthening treatment: performing chemical etching to reduce the thickness of the small pieces of glass by 7-10 [mu] m; (6) carrying out third-time strengthening treatment, namely putting the small pieces of glass into tempering salt for ion exchange; (7) performing AF plating treatment on the small pieces of glass; and (8) rubberizing the small pieces of glass. According to the tempered glass reinforced for three times, the thickness of the glass is more effectively controlled and thinned, microcracks of the glass can be more comprehensively repaired, the edge pressure strength of the tempered glass is enhanced, the falling ball impact strength is also improved in a breakthrough manner, the anti-cracking and anti-smashing performance is better, the service life is prolonged, the safety is improved, and the protection effect on a mobile phone is better.

Description

Technical Field

[0001] The invention relates to the technical field of tempered glass strengthening method, and more specifically, to a three-stage strengthening method for tempered glass.

[0002] Tempered glass, also known as strengthened glass, forms a compressive stress layer on the glass surface through physical or chemical methods. The glass itself has a high compressive strength and will not cause damage. However, after tempered glass is cut, there are a large number of microcracks on the edge, which reduces the strength of the glass and requires secondary strengthening.

[0003] For example, a prior patent with authorization announcement number CN109987854A discloses a method for secondary strengthening of tempered glass, comprising the following steps: (1) taking glass, grinding and polishing the surface of the glass after CNC molding; (2) immersing the ground and polished glass in a thinning etchant to thin the glass and perform secondary strengthening; (3) tempering the secondary strengthened glass.

[0004] In the prior art, tempered glass has only undergone secondary strengthening and still has defects such as being easy to break, not resistant to being smashed, and easy to crack at the edges. The edge compression strength is insufficient, which affects the user's use and experience. Summary of the invention

[0005] The purpose of the present invention is to provide a three-time strengthening method for tempered glass, aiming to solve the problem of insufficient edge compression strength of tempered glass in the prior art.

[0006] The present invention is implemented in this way. The three-time strengthening method of tempered glass has the following specific steps: (1) Cutting: cutting large pieces of glass into small pieces; (2) Small pieces of glass are formed by CNC; (3) First strengthening treatment: chemical etching is used to reduce the thickness of the small piece of glass by 30-40 μm; (4) Polishing the surface of the small piece of glass; (5) Second strengthening treatment: chemical etching is used to reduce the thickness of the small piece of glass by 7-10 μm; (6) The third strengthening treatment: placing a small piece of glass in tempered salt for ion exchange; (7) Perform AF coating on the surface of the small piece of glass; (8) Apply glue to small pieces of glass.

[0007] Furthermore, in step (3), the small piece of glass is immersed in an etching solution, and the etching time ranges from 18 to 25 minutes.

[0008] Furthermore, the three-time strengthening method of tempered glass includes an etching frame, the etching frame includes two frame plates, the two frame plates are arranged in a corresponding manner at intervals, the frame plate has a plurality of frame grooves, each of the frame grooves is arranged in a corresponding manner at intervals along the length direction, the frame grooves of the two frame plates are arranged in a one-to-one correspondence, two corresponding frame grooves are respectively embedded at both ends of a small piece of glass, and the frame grooves are arranged in a triangular shape.

[0009] Furthermore, the etching frame includes an upper cover plate and a lower cover plate, the frame groove is arranged in a long strip shape, the upper cover plate and the lower cover plate are used to cover the two ends of the frame groove, and the length of the frame groove is greater than the length of the small piece of glass; the three-time strengthening method of tempered glass includes a flip motor, the flip motor is assembled with the etching frame, and the flip motor is used to drive the etching frame to flip up and down.

[0010] Furthermore, the etching frame includes a frame fixing plate, the two frame plates are synchronously installed on the frame fixing plate, the upper cover plate and the lower cover plate are respectively movably installed on the frame fixing plate, and the flip motor is used to drive the frame fixing plate to be flipped up and down; the three-time strengthening method of tempered glass includes a lifting device, the lifting device is assembled with the frame fixing plate, and the lifting device is used to drive the frame fixing plate to be arranged to rise or fall.

[0011] Furthermore, the three-time strengthening method of tempered glass includes a tempering box, the tempering box includes a drying area and a soaking area, the drying area and the soaking area are arranged correspondingly up and down, the soaking area is used to hold tempering salt, the drying area is provided with a plurality of drying tubes, the drying tubes are used to output hot air, and the drying tubes are arranged correspondingly to the surface of the small piece of glass.

[0012] Furthermore, the three-time strengthening method of tempered glass includes a stainless steel tube and an aluminum tube, the stainless steel tube is butt-jointed with the tempering box, the stainless steel tube is connected or blocked with the immersion area, and the stainless steel tube is used to transport the tempering salt solution; the aluminum tube is sleeved with the stainless steel tube, and the stainless steel tube and the aluminum tube are respectively arranged in a circuitous manner.

[0013] Furthermore, in step (6), the tempering salt is liquid, and the temperature range of the tempering salt is 365° C. to 400° C.

[0014] Furthermore, the thickness of the small piece of glass is in the range of 0.15-1.8 mm.

[0015] Compared with the prior art, the three-time strengthening method of tempered glass provided by the present invention can more effectively control and reduce the thickness of the glass through the three-time strengthened tempered glass, can more comprehensively repair the microcracks of the glass, enhance the edge compression strength of the tempered glass, and also achieve a breakthrough improvement in the falling ball impact strength. The tempered glass that has been strengthened three times has better crack resistance and smash resistance, longer service life, improved safety, and better protection for mobile phones. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic flow chart of the steps of the three-time strengthening method of tempered glass provided by the present invention; Figure 2 It is a top cross-sectional schematic diagram of an etching frame of the three-time strengthening method of tempered glass provided by the present invention; Figure 3 It is a schematic diagram of the main cross section of an etching frame of the three-time strengthening method of tempered glass provided by the present invention; Figure 4 It is a schematic diagram of the layout of the longitudinal guide plate of the three-time strengthening method of tempered glass provided by the present invention; Figure 5 Schematic diagram of a finished product embodiment of the three-time strengthening method for tempered glass provided by the present invention; Figure 6 It is a schematic diagram of a finished product embodiment of the three-time strengthening method of tempered glass provided by the present invention. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0018] The implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0019] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0020] Reference Figure 1-6 The figure shows a preferred embodiment of the present invention.

[0021] The three-step strengthening method of tempered glass, the specific steps are as follows: (1) Cutting: Cutting large pieces of glass into small pieces of glass 1; (2) The small piece of glass 1 is formed by CNC; (3) First strengthening treatment: reducing the thickness of the small piece of glass 1 by 30-40 μm through chemical etching; (4) Polishing the surface of the small piece of glass 1; (5) Second strengthening treatment: reducing the thickness of the small piece of glass 1 by 7-10 μm through chemical etching; (6) Third strengthening treatment: placing the small piece of glass 1 in tempered salt for ion exchange; (7) performing AF coating treatment on the surface of the small piece of glass 1; (8) Apply glue to the small piece of glass 1.

[0022] The above-mentioned three-time strengthening method of tempered glass can more effectively control and reduce the thickness of the glass through the three-time strengthened tempered glass, can more comprehensively repair the micro cracks in the glass, enhance the edge compression strength of the tempered glass, and has also achieved a breakthrough improvement in the falling ball impact strength. The tempered glass that has been strengthened three times has better crack resistance and smash resistance, longer service life, improved safety, and better protection for mobile phones.

[0023] After the strengthening treatment in step (5), the edge pressure performance of the glass can be improved and stabilized, and the edge cracking phenomenon of the glass can be greatly reduced.

[0024] After the small piece of glass 1 has been processed through steps (1) to (4), there are still microcracks on the edges that are difficult to detect. After the etching treatment in step (3), most of the microcracks have been removed. The tempering step (7) is directly performed. Since the principle of ion exchange of the tempering salt is that large potassium ions replace small sodium ions, the microcracks that have not been removed in step (3) are stretched open by the entry of large ions, and the microcracks are re-formed at the edges of the glass. Therefore, before tempering, the glass is etched again to etch away these microcracks again, and then tempering is performed to avoid the re-formation of microcracks.

[0025] In step (3), the small piece of glass 1 is immersed in an etching solution, and the etching time ranges from 18 to 25 minutes.

[0026] In step (5), the small piece of glass 1 is immersed in an etching solution, and the etching time ranges from 5 to 6 minutes.

[0027] The first strengthening process and the second strengthening process are etching processes performed on both sides of the small piece of glass 1 .

[0028] The composition of the etching solution is 10%-15% hydrofluoric acid and 85%-90% water.

[0029] The three-time strengthening method of tempered glass includes an etching frame, which includes two frame plates 2, which are arranged at intervals and correspondence. The frame plates 2 have multiple frame grooves, and each frame groove is arranged at intervals and correspondence along the length direction. The frame grooves of the two frame plates 2 are arranged one by one, and two corresponding frame grooves are respectively embedded at both ends of the small piece of glass 1.

[0030] Under the action of the two frame plates 2, the small pieces of glass 1 can be etched in batches to improve the effect; at the same time, under the action of the frame grooves, the small pieces of glass 1 can be positioned.

[0031] The frame grooves are arranged in a triangular shape, so that the corners of the small glass pieces 1 contact the frame grooves, increasing the exposed area of ​​the small glass pieces 1, making it easier for the etching to soak the small glass pieces 1, and improving the etching effect.

[0032] The etching frame includes an upper cover plate 3 and a lower cover plate 4. The frame groove is arranged in a long strip shape. The upper cover plate 3 and the lower cover plate 4 are used to cover the two ends of the frame groove. The length of the frame groove is greater than the length of the small piece of glass 1. Under the action of the upper cover plate 3 and the lower cover plate 4, the small piece of glass 1 is prevented from accidentally leaving the frame groove.

[0033] The upper cover plate 3 and the lower cover plate 4 can be driven by a motor or by a push rod.

[0034] Alternatively, the upper cover plate 3 and the lower cover plate 4 are respectively provided with a cover gear, and the frame plate 2 is provided with a frame gear, and the cover gear and the frame gear are meshed, and the mutual movement between the upper cover plate 3 or the lower cover plate 4 and the frame plate 2 is achieved by driving the cover gear or the frame gear.

[0035] The three-time strengthening method of tempered glass includes a flip motor, which is assembled with the etching frame and used to drive the etching frame to flip up and down; in this way, the small piece of glass 1 is flipped, which is convenient for presenting the small pieces of glass 1 on different sides and ensuring the etching effect.

[0036] Based on the preset time, the flip motor is started to switch the contact between the small piece of glass 1 and the upper cover plate 3 and the lower cover plate 4.

[0037] The etching frame includes a frame fixing plate, two frame plates 2 are synchronously mounted on the frame fixing plate, an upper cover plate 3 and a lower cover plate 4 are movably mounted on the frame fixing plate, and a flip motor is used to drive the frame fixing plate to be flipped up and down; under the action of the frame fixing plate, the two frame plates 2 are synchronously driven.

[0038] The three-time tempering method of tempered glass comprises a lifting device, wherein the lifting device is assembled with a frame fixing plate, and the lifting device is used to drive the frame fixing plate to be arranged upward or downward; the small piece of glass 1 is automatically taken out and put in, thereby saving manpower and material resources.

[0039] The three-time strengthening method of tempered glass includes an etching box, an etching rack is located inside the etching box, and the etching box is used to place etching liquid; the etching box is provided with a liquid inlet pipe and a liquid outlet pipe. After step (3), the liquid outlet pipe is switched to a conducting state, and the etching liquid is discharged through the liquid outlet pipe, and then new etching liquid is input through the liquid inlet pipe. The new etching liquid is used for re-etching treatment in step (5).

[0040] The three-times strengthening method of tempered glass includes a tempering box, which includes a drying area and a soaking area, which are arranged correspondingly up and down, the soaking area is used to hold tempering salt, and the drying area is provided with a plurality of drying tubes, which are used to output hot air, and the drying tubes are arranged correspondingly to the surface of the small piece of glass 1.

[0041] In this way, the tempering treatment of the small piece of glass 1 is achieved based on the immersion area, and then the small piece of glass 1 is transferred to the drying area for rapid drying, thereby improving the working efficiency.

[0042] The tempering salt component is potassium nitrate.

[0043] In step (6), the small piece of glass 1 is immersed in tempering salt for a tempering time ranging from 1.5 to 2.5 hours.

[0044] The drying tube includes a heating rod and a drying shell. The heating rod is arranged inside the drying shell. The fan is connected to the inside of the drying shell. The drying shell has an air outlet, which is arranged in a long strip and faces the surface of the small piece of glass 1.

[0045] The drying tube includes an air guide plate, which is arranged in an arc shape and arranged correspondingly to the air outlet. The air guide plate is used to guide hot air to the surface of the small piece of glass 1 to improve the drying effect.

[0046] The tempering box includes a moving structure, which is used to transfer each drying tube to avoid affecting the placement of the small piece of glass 1.

[0047] The tempering box includes a plurality of longitudinal guide plates 5, which are arranged to extend in an overall effect, and each longitudinal guide plate 5 is arranged to be spaced and corresponding, and a longitudinal guide cavity 51 is formed between adjacent longitudinal guide plates 5, and an air outlet is located above the longitudinal guide cavity 51, and the air outlet conveys airflow to the longitudinal guide cavity 51; during the tempering treatment, the small piece of glass 1 is arranged longitudinally, the small piece of glass 1 and the longitudinal guide plates 5 are arranged in an offset manner, and the small piece of glass 1 and the longitudinal guide cavity 51 are arranged to correspond; in this way, it is convenient to dry both sides of the small piece of glass 1.

[0048] The wind guide plate and the longitudinal guide plate 5 can be arranged together or synchronously. When arranged synchronously, the wind guide plate has a plurality of through openings, and each through opening is connected to the longitudinal guide cavity 51.

[0049] The tempered box is provided with a plurality of support rods, each of which is provided with a plurality of elastic blocks. The support rods are used to support the small pieces of glass 1 to achieve the longitudinal arrangement of the small pieces of glass 1 , and the adjacent elastic blocks are used to clamp the small pieces of glass 1 to achieve the placement and positioning of the small pieces of glass 1 .

[0050] The three-time strengthening method of tempered glass includes stainless steel tube and aluminum tube, the stainless steel tube is butt-jointed with the tempering box, the stainless steel tube is connected or blocked with the immersion area, the stainless steel tube is used to transport the tempering salt solution; the aluminum tube is sleeved with the stainless steel tube, and the stainless steel tube and the aluminum tube are respectively arranged in a circuitous manner.

[0051] In this way, under the action of the stainless steel pipe, the output of the tempered salt solution is achieved. At the same time, the tempered salt solution is cooled during the output process, which is convenient for the recovery and reuse of the tempered salt solution.

[0052] In step (6), the tempering salt is liquid, and the temperature range of the tempering salt is 365°C to 400°C, thereby ensuring the ion exchange effect and the strengthening effect.

[0053] The thickness of the small piece of glass 1 ranges from 0.15 to 1.8 mm; the small piece of glass 1 with a thickness of 0.15 to 1.8 mm is suitable for three-times strengthening.

[0054] Under the traditional one-strength condition, the ball drop test can reach 64g / 45cm and the edge compression strength can reach 100N.

[0055] After adding the second strong process, the ball drop test can reach 64g / 130cm and the edge compression strength can reach 200N.

[0056] After going through three strong processes, the ball drop test can reach 64g / 150cm, and the edge compression strength reaches 400N.

[0057] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A three-step tempering method for tempered glass, characterized in that: The specific steps are as follows: (1) Cutting: cutting large pieces of glass into small pieces; (2) Small pieces of glass are formed by CNC; (3) First strengthening treatment: chemical etching is used to reduce the thickness of the small piece of glass by 30-40 μm; (4) Polishing the surface of the small piece of glass; (5) Second strengthening treatment: chemical etching is used to reduce the thickness of the small piece of glass by 7-10 μm; (6) The third strengthening treatment: placing a small piece of glass in tempered salt for ion exchange; (7) Perform AF coating on the surface of the small piece of glass; (8) Apply glue to small pieces of glass.

2. The three-time strengthening method for tempered glass according to claim 1, characterized in that: In step (3), the small piece of glass is immersed in an etching solution, and the etching time ranges from 18 to 25 minutes.

3. The three-time strengthening method for tempered glass according to claim 1, characterized in that: The three-time strengthening method of tempered glass includes an etching frame, the etching frame includes two frame plates, the two frame plates are arranged in a corresponding manner at intervals, the frame plate has a plurality of frame grooves, each of the frame grooves is arranged in a corresponding manner at intervals along the length direction, the frame grooves of the two frame plates are arranged in a one-to-one correspondence, two corresponding frame grooves are respectively embedded at both ends of a small piece of glass, and the frame grooves are arranged in a triangular shape.

4. The method for three-time strengthening of tempered glass according to claim 3, characterized in that: The etching frame includes an upper cover plate and a lower cover plate, the frame groove is arranged in a long strip shape, the upper cover plate and the lower cover plate are used to cover the two ends of the frame groove, and the length of the frame groove is greater than the length of the small piece of glass; the three-time strengthening method of tempered glass includes a flip motor, the flip motor is assembled with the etching frame, and the flip motor is used to drive the etching frame to flip up and down.

5. The three-time strengthening method for tempered glass according to claim 4, characterized in that: The etching frame includes a frame fixing plate, the two frame plates are synchronously installed on the frame fixing plate, the upper cover plate and the lower cover plate are respectively movably installed on the frame fixing plate, and the flip motor is used to drive the frame fixing plate to flip up and down; the three-time strengthening method of tempered glass includes a lifting device, the lifting device is assembled with the frame fixing plate, and the lifting device is used to drive the frame fixing plate to rise or fall.

6. The method for three-time strengthening of tempered glass according to claim 5, characterized in that: The three-times strengthening method of tempered glass includes a tempering box, the tempering box includes a drying area and a soaking area, the drying area and the soaking area are arranged correspondingly up and down, the soaking area is used to hold tempering salt, the drying area is provided with a plurality of drying tubes, the drying tubes are used to output hot air, and the drying tubes are arranged correspondingly to the surface of the small piece of glass.

7. The three-times strengthening method of tempered glass according to claim 6, characterized in that: The three-time strengthening method of tempered glass comprises a stainless steel tube and an aluminum tube, wherein the stainless steel tube is butt-jointed with the tempering box, the stainless steel tube is connected or blocked with the immersion area, and the stainless steel tube is used to transport the tempering salt solution; the aluminum tube is sleeved with the stainless steel tube, and the stainless steel tube and the aluminum tube are respectively arranged in a circuitous manner.

8. The method for three-time strengthening of tempered glass according to any one of claims 1 to 6, characterized in that: In step (6), the tempering salt is liquid, and the temperature range of the tempering salt is 365°C to 400°C.

9. The method for three-time strengthening of tempered glass according to any one of claims 1 to 6, characterized in that: The thickness of the small piece of glass is in the range of 0.15-1.8 mm.

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