Mould for pressing high borosilicate glass lens

Abstract

The utility model relates to the field of glass lens molds, and provides a mold for pressing a high borosilicate glass lens, which comprises a punch, an opening ring and a bottom mold, the bottom end of the opening ring is fixedly connected with the bottom die, the punch is arranged in the opening ring, and the driving device drives the punch to press downwards to be pressed with the bottom die to form a pressed flat glass lens. An annular protrusion is arranged on the edge of the bottom end of the punch. A plurality of heat preservation blocks are arranged at the bottom end of the bottom die, and grooves are formed in the middles of the upper surfaces of the heat preservation blocks. The mold has the beneficial effects that the heat preservation effect of molten glass in the mold is obviously improved by arranging the heat preservation block, and the molten glass is prevented from entering a mold closing seam by arranging the annular bulge, so that the generation of glass chips is reduced.

Description

Technical Field

[0001] The utility model relates to the field of glass lens molds, in particular to a mold for pressing a high borosilicate glass lens. Background Art

[0002] The production of flat glass lenses is a highly specialized process, centered around a precise and complex pressing process. Using specialized molds and high-pressure equipment, molten glass is precisely pressed into a lens shape with the curvature and optical properties required for a wide range of optical applications.

[0003] Currently, flat glass lens products produced through the pressing process generally have the characteristics of being relatively small in height and having a shape similar to a flat plate. This characteristic makes it very easy to generate tiny glass chips during the lens molding process. These glass chips are mainly generated due to two reasons: first, the glass solution cools too quickly during the pressing process, which increases its internal stress and easily produces tiny cracks and fragments; second, some of the glass solution accidentally enters the gap between the pressing head and the mouth ring during the pressing process. This part of the glass is also prone to forming fragments when it is cooled. Due to its small size and difficulty in complete control, these tiny glass chips are often scattered on the surface of the product or embedded in its tiny structure, posing great challenges to subsequent inspection, cleaning and processing. Not only does it seriously affect the appearance quality of the product, it may also have an adverse effect on the optical performance of the lens, thereby reducing the product's qualification rate and market competitiveness.

[0004] Therefore, how to effectively reduce or even completely eliminate the glass debris generated during the pressing process has become one of the key issues in improving the quality and efficiency of flat glass lens production. We urgently need a pressing mold that can solve the above technical pain points. Utility Model Content

[0005] Aiming at the shortcomings of existing technologies, the problem of glass chips being easily generated during the current lens molding process is solved.

[0006] The utility model provides a mold for pressing a high borosilicate glass lens, comprising a punch, a mouth ring and a bottom mold; the bottom end of the mouth ring is fixedly connected to the bottom mold, the punch is arranged in the mouth ring, and a driving device drives the punch downward to press with the bottom mold to form a pressed flat glass lens;

[0007] An annular protrusion is provided on the bottom edge of the punch;

[0008] A plurality of heat-insulating blocks are arranged at the bottom end of the bottom mold, and a groove is arranged in the middle of the upper surface of the heat-insulating block.

[0009] As a preferred solution, a plurality of positioning key slots are provided at the bottom end of the bottom mold, and a plurality of positioning keys are provided at corresponding positions of the mouth ring. The positioning keys cooperate with the positioning key slots to fix the mouth ring and the bottom mold.

[0010] As a preferred solution, the positioning keyway is composed of two square protrusions arranged opposite to each other, and the positioning key is arranged between the two protrusions.

[0011] As a preferred solution, a detachable wear-resistant block is provided on the inner side of the protrusion.

[0012] Furthermore, the protrusion is provided with a transverse through hole, the wear-resistant block is provided with a transverse screw hole at a corresponding position, and the protrusion and the wear-resistant block are connected by bolts.

[0013] As a preferred solution, the depth of the groove is 15 to 20 mm.

[0014] As a preferred solution, the protrusion height of the annular protrusion is 0.3-1 mm.

[0015] The beneficial effects of the utility model are:

[0016] 1. The utility model significantly improves the insulation effect of the glass liquid inside the mold by setting the insulation block, reduces heat loss, helps to maintain the temperature of the glass liquid during the pressing process, thereby increasing the fluidity of the glass liquid and avoiding the generation of tiny cracks and fragments.

[0017] 2. The utility model prevents molten glass from entering the mold gap by providing an annular protrusion, preventing it from overflowing from the gap when the mold is closed, thereby reducing the generation of glass chips. This improvement helps maintain mold cleanliness, product quality, and improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to make the content of the utility model easier to understand, the utility model is further described in detail below based on specific embodiments and in conjunction with the accompanying drawings, wherein:

[0019] Figure 1 It is a structural diagram of the present utility model.

[0020] Figure 2 for Figure 1 Schematic diagram of the locally enlarged structure at point A in the middle.

[0021] Figure 3 It is a structural schematic diagram of the bottom mold of the utility model.

[0022] Figure 4 This is a structural diagram of the insulation block of the utility model.

[0023] The reference numerals in the accompanying drawings are:

[0024] 1. Punch; 2. Mouth ring; 3. Bottom die; 4. Annular protrusion; 5. Insulation block; 6. Wear-resistant block; 7. Square protrusion; 8. Groove. DETAILED DESCRIPTION

[0025] To illustrate the features of the present invention, the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0026] Example:

[0027] refer to Figures 1 to 4 This embodiment provides a mold for pressing a high borosilicate glass lens, comprising a punch 1, a mouth ring 2, and a bottom mold 3; the bottom end of the mouth ring 2 is fixedly connected to the bottom mold 3, the punch 1 is arranged in the mouth ring 2, and a driving device drives the punch 1 to press downward and press with the bottom mold 3 to form a pressed flat glass lens;

[0028] The bottom edge of the punch 1 is provided with a 0.5 mm high annular protrusion 4 to prevent the glass liquid from approaching the gap between the punch 1 and the mouth ring 2;

[0029] A plurality of heat-insulating blocks 5 are provided at the bottom end of the bottom mold 3 , and a groove 8 with a depth of 15 mm is provided in the middle of the upper surface of the heat-insulating block 5 .

[0030] Preferably, in this embodiment, a plurality of positioning key slots are provided at the bottom end of the bottom mold 3 , and a plurality of positioning keys are provided at corresponding positions of the mouth ring 2 . The positioning keys are used in conjunction with the positioning key slots to lock and fix the mouth ring 2 and the bottom mold 3 .

[0031] Preferably, the positioning key slot is composed of two square protrusions 7 arranged opposite to each other, the positioning key is arranged between the two protrusions 7, and the two protrusions 7 clamp the positioning key to form a stable fixation.

[0032] Preferably, in this embodiment, a detachable wear-resistant block 6 is provided on the inner side of the protrusion 7. The specific connection method is that a transverse through hole is opened in the protrusion 7, and a transverse screw hole is opened at the corresponding position of the wear-resistant block 6. The protrusion 7 and the wear-resistant block 6 are connected by bolts. This device can prevent the positioning key groove from being worn out due to long-term use. When the wear-resistant block 6 produces a certain amount of wear, a new wear-resistant block 6 can be replaced.

[0033] This embodiment significantly improves the insulation of the molten glass within the mold by providing a heat-insulating block, reducing heat loss and helping to maintain the temperature of the molten glass during the pressing process. This prevents the buildup of internal stress in the molten glass, which can lead to tiny cracks and fragments. The annular protrusion prevents the molten glass from entering the mold gap and spilling out of it when the mold closes, thus reducing the generation of glass chips. This improvement helps maintain mold cleanliness, improves product quality, and enhances production efficiency.

[0034] The above embodiments and accompanying drawings are intended only to illustrate the technical solutions of the present invention and are not intended to limit the present invention. The present invention has been described in detail with reference to preferred embodiments. Those skilled in the art should understand that any changes, modifications, additions, or substitutions made by those skilled in the art within the spirit of the present invention do not depart from the spirit of the present invention and are intended to fall within the scope of the claims of the present invention. Other related technical structures not fully disclosed in this utility model are prior art in the art.

Claims

1. A mold for pressing a high borosilicate glass lens, comprising a punch (1), a mouth ring (2) and a bottom mold (3); the bottom end of the mouth ring (2) is fixedly connected to the bottom mold (3), the punch (1) is arranged in the mouth ring (2), and a driving device drives the punch (1) to press downward and press with the bottom mold (3) to form a pressed flat glass lens; Its characteristics are: An annular protrusion (4) is provided on the bottom edge of the punch (1) to prevent the glass liquid from approaching the gap between the punch (1) and the mouth ring (2); A plurality of heat-insulating blocks (5) are provided at the bottom end of the bottom mold (3), and a groove (8) is provided in the middle of the upper surface of the heat-insulating block (5).

2. The mold for pressing a borosilicate glass lens according to claim 1, wherein: A plurality of positioning key slots are provided at the bottom end of the bottom die (3), and a plurality of positioning keys are provided at corresponding positions of the mouth ring (2). The positioning keys cooperate with the positioning key slots to fixedly connect the mouth ring (2) and the bottom die (3).

3. The mold for pressing a borosilicate glass lens according to claim 2, wherein: The positioning keyway is composed of two square protrusions (7) arranged opposite to each other, and the positioning key is arranged between the two protrusions (7).

4. The mold for pressing a borosilicate glass lens according to claim 3, wherein: A detachable wear-resistant block (6) is provided inside the protrusion (7).

5. The mold for pressing a borosilicate glass lens according to claim 4, characterized in that: The protrusion (7) is provided with a transverse through hole, and the wear-resistant block (6) is provided with a transverse screw hole at a corresponding position, and the protrusion (7) and the wear-resistant block (6) are connected by bolts.

6. The mold for pressing a borosilicate glass lens according to claim 1, wherein: The depth of the groove (8) is 15 to 20 mm.

7. The mold for pressing a borosilicate glass lens according to claim 1, wherein: The protrusion height of the annular protrusion (4) is 0.3-1 mm.

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