Double-layer heat insulation glass cup structure and manufacturing process

Abstract

The double-layer heat insulation glass cup structure comprises an inner cup body which is a hollow container formed by a tubular glass base material through hot melting, and the top of the inner cup body axially extends to form a cup opening part; the integrated glass filter screen assembly is of a net-shaped structure formed by melting and pressing a glass bar and comprises a) an annular supporting frame which is fixed to the position, 5-8 mm away from a cup opening, of the inner wall of the inner cup body through high-temperature welding; b) a filter pore structure in array distribution, the pore diameter is 0.5-1.2 mm, and the pore density is 15-25 pores / cm; the outer cup body is a tubular glass component coaxially arranged on the outer side of the inner cup body in a sleeving mode, the outer cup body and the inner cup body form a closed air heat insulation cavity at the cup opening part in a fusion joint mode, and the radial distance between the outer cup body and the inner cup body is 2.5-4 mm; and the thermodynamic property, the structural reliability, the hygiene grade and the process compatibility are improved.

Description

Technical Field

[0001] The present application relates to the technical field of glass manufacturing, and in particular to a double-layer heat-insulating glass structure and manufacturing process. Background Art

[0002] In the prior art, most glasses with filtering functions adopt a split design, in which the metal filter is connected to the glass body through a snap-fit ​​structure, which has the following defects: Difference in thermal expansion coefficient: The difference in thermal expansion coefficient between the metal / plastic filter and the glass cup body is 5-8×10⁻ 6 / ℃, it is easy to generate interfacial stress and cause cracking under thermal shock conditions; Hygiene hazards: Tea stains easily accumulate on detachable connection parts, breeding microorganisms; Insufficient structural reliability: The existing integrated glass filter adopts a vertical welding process, the filter support strength is low, and the long-term use breakage rate reaches 23%. Summary of the Invention

[0003] Based on this, the present application provides a double-layer insulated glass cup structure and manufacturing process to solve one of the above technical problems.

[0004] The technical solution adopted by the present application to solve its technical problems is: first, a glass cup structure, comprising: an inner cup body: a hollow container formed by hot-melt forming of a tubular glass substrate, the top of which extends axially to form a cup mouth; an integrated glass filter assembly: a mesh structure formed by melting and pressing a glass rod, the assembly comprising: a) an annular support frame, fixed to the inner wall of the inner cup at a distance of 5-8 mm from the cup mouth by high-temperature welding; b) an array-distributed filter pore structure with a pore diameter of 0.5-1.2 mm and a pore density of 15-25 pores / cm²; an outer cup body: a tubular glass component coaxially sleeved on the outside of the inner cup body, and formed with the inner cup body at the cup mouth by melting and bonding, the radial spacing of which is 2.5-4 mm.

[0005] In some embodiments, the top of the outer cup body forms a conical sealing joint surface with a gradually expanding outer diameter, forming a stepped transition structure with the cup mouth of the inner cup body.

[0006] In some embodiments, the top joint surface of the outer cup body is provided with: a) a spiral sealing thread with a pitch of 2.8-3.2 mm and a thread depth of 0.6-1.0 mm; b) a radially raised cup shoulder structure with a height of 3-5 mm, located 2-3 mm below the sealing thread.

[0007] In a second aspect, a method for manufacturing a double-layer insulated glass cup structure according to the first aspect comprises: S1. forming a glass filter assembly: a soda-lime glass rod with a diameter of 6-8 mm is melted at 1280±20°C and injected into a die-casting mold with a punch, and the pressure is maintained for 30-45 seconds to form a filter blank with a support frame; S2. precision polishing: a three-axis CNC polishing machine is used to perform surface treatment on the filter blank, with the Ra value controlled within 0.8-1.6 μm; S3. preparing the inner cup body: a) thermally cutting a borosilicate glass tube at 1250±50°C to form an inner cup blank; b) performing a secondary melting and sealing on the bottom of the blank to form a hemispherical cup bottom; S4. filter integration: the polished filter assembly is positioned and installed in the inner cup body, and annularly welded at 1220±30°C to form a continuous sealed seam; S5. preparing the outer cup body: a) a) Perform a gradient heating process on the borosilicate glass tube and perform a bottom melting and thickening treatment at 1300±50°C; b) Process a spiral sealing thread and cup shoulder structure at the cup mouth through a CNC thermoforming process; S6. Composite Assembly: Coaxially assemble the inner and outer cup bodies on a rotating fixture and perform interface fusion at 1180±20°C to form a composite structure with an air insulation cavity.

[0008] In some embodiments, the melting temperature of steps S1 and S5a is controlled at 1300-1350°C, and the processing temperature of steps S3a, S4, and S6 is controlled at 1150-1250°C.

[0009] In some embodiments, the fusion process in step S6 simultaneously forms the cup shoulder structure and the sealing thread of the outer cup body.

[0010] The beneficial effects of this application are: improved thermodynamic performance: the double-layer air insulation cavity increases the thermal resistance by 40-60%, and the outer wall temperature of 95°C hot water is ≤45°C; enhanced structural reliability: the annular welding process makes the bending strength of the filter assembly reach 18-22MPa, which is 300% higher than traditional vertical welding; optimized sanitary level: the surface roughness of the integrated glass structure is reduced by 82%, and the bacterial attachment rate is reduced to <5CFU / cm²; improved process compatibility: gradient temperature control increases the product yield from 68% to 92%. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0012] Figure 1 It is a cross-sectional schematic diagram of the glass cup of this application.

[0013] Figure 2 It is a three-dimensional schematic diagram of the glass cup of this application.

[0014] Explanation of the accompanying figures: 1. Inner cup body, 2. Cup mouth, 3. Filter assembly, 301. Annular support frame, 302. Filter hole structure, 4. Outer cup body, 5. Air insulation cavity, 6. Conical sealing joint surface, 7. Step transition structure, 8. Sealing thread, 9. Cup shoulder structure, 10. Hemispherical cup bottom. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection of this application.

[0016] In the examples of this application, please refer to Figure 1-2 As shown, in the first aspect, a glass cup structure mainly includes: an inner cup body 1: a hollow container formed by hot-melt forming of a tubular glass substrate, the top of which extends axially to form a cup mouth 2; an integrated glass filter assembly 3: a mesh structure formed by melting and pressing a glass rod, the assembly includes: a) an annular support frame 4, fixed to the inner wall of the inner cup body 1 at 25-8mm away from the cup mouth by high-temperature welding; b) an array-distributed filter pore structure 5 with a pore diameter of 0.5-1.2mm and a pore density of 15-25 holes / cm². Compared with traditional filters, the surface roughness of the integrated glass structure is reduced by 82%, the bacterial attachment rate is reduced to <5CFU / cm², and the hygiene level is better; an outer cup body 6: a tubular glass component coaxially sleeved on the outside of the inner cup body 1, and is fused with the inner cup body 1 at the cup mouth 2 to form a closed air insulation cavity 7, the radial spacing of which is 2.5-4mm. In addition, in some embodiments, a conical sealing joint surface 8 with a gradually expanding outer diameter is formed on the top of the outer cup body 6, forming a stepped transition structure 9 with the cup mouth 2 of the inner cup body 1. Specifically, the filter assembly 3 is radially arranged in the glass cup. Since the filter assembly 3 is fixedly joined to the inner cup body 1 by melting, in order to facilitate pouring during use, the filter assembly 3 is semi-circular, covering 135%-45% of the radial area of ​​the inner cup body, and its edge is a corrugated arc surface. This structural feature can effectively avoid the bypass of unfiltered liquid while ensuring the fluid permeability, and maintain the stability of the axial output of the liquid flow during the pouring operation. This design can reduce the stress concentration coefficient of the filter edge to below 1.3, thereby extending the thermal fatigue life of the glass component.

[0017] In addition, it should be noted that the glass filter assembly 3 mainly plays a filtering role when drinking water. When filling water, it is necessary to pour it into the glass from the part that is not covered by the filter assembly 3. The filter assembly 3 protrudes outward in an arc at the edge of the inner cup body 1, which reduces the coverage area as much as possible while ensuring the filtering effect, taking into account both cost and aesthetics.

[0018] Some preferred / improved embodiments based on the above embodiments will be described below. Any one of the following embodiments may be selected, or multiple embodiments may be selected and combined.

[0019] Specifically, the top joint surface of the outer cup body 6 is provided with: a) a spiral sealing thread 10 with a pitch of 2.8-3.2mm and a thread depth of 0.6-1.0mm; b) a radially raised cup shoulder structure 11 with a height of 3-5mm, located 2-3mm below the sealing thread 10.

[0020] In a second aspect, a method for manufacturing a double-layer insulated glass cup structure according to the first aspect comprises: S1. Forming the glass filter assembly 3: Melting a soda-lime glass rod with a diameter of 6-8 mm at 1280±20°C, injecting it into a die-casting mold with a punch, and holding the pressure for 30-45 seconds to form a filter blank with a support frame, preferably at 1280°C for 40 seconds; S2. Precision polishing: Surface treatment of the filter blank is performed using a three-axis CNC polishing machine, with an Ra value controlled within 0.8-1.6 μm; S3. Preparing the inner cup body 1: a) Thermally cutting a borosilicate glass tube at 1250±50°C, preferably 1250°C, to form an inner cup blank; b) Performing a secondary melting and sealing operation on the bottom of the blank to form a hemispherical cup base 12; S4. Filter Assembly: The polished filter assembly 3 is positioned and installed within the inner cup 1. Circular welding is performed at 1220±30°C to form a continuous, sealed seam. This circular welding process achieves a bending strength of 18-22 MPa for the filter assembly 3, a 300% improvement compared to traditional vertical welding. S5. Preparation of the Outer Cup 6: a) The borosilicate glass tube is subjected to a gradient heating process, with bottom melting and thickening performed at 1300±50°C, preferably 1300°C. This gradient temperature control increases the product yield from 68% to 92%, improving process compatibility. b) The spiral sealing thread 10 and cup shoulder structure 11 are formed on the cup rim 2 using a CNC thermoforming process. S6. Composite assembly: The inner cup body 1 and the outer cup body 6 are coaxially assembled on a rotating fixture, and interface fusion is performed at 1180±20℃ to form a composite structure with an air insulation cavity 7. The double-layer air insulation cavity 7 increases the thermal resistance by 40-60%, and the outer wall temperature of 95℃ hot water is ≤45℃, thereby improving the thermodynamic performance.

[0021] Furthermore, the melting temperature of steps S1 and S5a is controlled at 1300-1350°C, and the processing temperature of steps S3a, S4 and S6 is controlled at 1150-1250°C.

[0022] Furthermore, the fusion process of step S6 simultaneously forms: a) the stepped limiting flange of the cup mouth 2 of the inner cup body 1 ; and b) the cup shoulder structure 11 and the sealing thread 10 of the outer cup body 6 .

[0023] Thus far, various embodiments of the present application have been described in detail. To avoid obscuring the concept of the present application, some details well known in the art have not been described. Based on the above description, those skilled in the art will fully understand how to implement the technical solutions disclosed herein.

[0024] Finally, it should be noted that the above is only a preferred embodiment of the present application, and the aforementioned embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not drive the essence of the corresponding technical solutions away from the spirit and scope of the technical solutions of the various embodiments of the present application.

Claims

1. A double-layer insulation glass cup structure, characterized in that: include: Inner cup body: A hollow container formed by hot-melting a tubular glass substrate, the top of which extends axially to form the cup mouth; Integrated glass filter assembly: A mesh structure formed by melting and pressing glass rods. The assembly includes: a) an annular support frame fixed to the inner wall of the inner cup at a distance of 5-8 mm from the cup mouth by high temperature welding; b) Array-distributed filter structure with a pore size of 0.5-1.2 mm and a pore density of 15-25 pores / cm²; Outer cup body: A tubular glass component coaxially sleeved on the outside of the inner cup body, which is fused with the inner cup body at the cup mouth to form a closed air insulation cavity, with a radial spacing of 2.5-4mm.

2. The double-layer insulating glass structure according to claim 1, characterized in that: The top joint surface of the outer cup body is provided with: a) Helical sealing thread, pitch 2.8-3.2mm, thread depth 0.6-1.0mm; b) A radially raised cup shoulder structure with a height of 3-5 mm and located 2-3 mm below the sealing thread.

3. A method for manufacturing the double-layer insulating glass structure according to claim 1 or 2, comprising: S1. Glass Filter Assembly Molding: A 6-8mm diameter soda-lime glass rod is melted at 1280±20°C and injected into a die-casting mold with a punch. The pressure is maintained for 30-45 seconds to form a filter blank with a supporting frame. S2. Precision polishing: A three-axis CNC polishing machine is used to perform surface treatment on the filter blank, with the Ra value controlled within 0.8-1.6μm; S3. Inner cup preparation: a) Thermally cut the borosilicate glass tube at 1250±50℃ to form an inner cup blank; b) performing secondary melting and sealing on the bottom of the blank to form a hemispherical cup bottom; S4. Filter Assembly: Position and install the polished filter assembly into the inner cup. Circularly weld the filter at 1220±30°C to form a continuous, sealed seam. S5. Preparation of outer cup: a) Perform gradient heating on the borosilicate glass tube and perform bottom melting and thickening treatment at 1300±50℃; b) Processing the spiral sealing thread and cup shoulder structure on the cup mouth through CNC thermoforming process; S6. Composite assembly: Coaxially assemble the inner cup and the outer cup on a rotating fixture, and perform interface fusion at 1180±20℃ to form a composite structure with an air insulation cavity.

4. The manufacturing method according to claim 3, wherein: The melting temperature of steps S1 and S5a is controlled at 1300-1350°C, and the processing temperature of steps S3a, S4 and S6 is controlled at 1150-1250°C.

5. The manufacturing method according to claim 3, wherein: The fusion process of step S6 simultaneously forms: the cup shoulder structure and the sealing thread of the outer cup body.

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