Glass lens self-centering die
By using a self-centering mold design and a combination of ejector pins and springs, the problem of glass lens blanks deviating from the center during the molding process was solved, thus achieving high-quality lens molding.
Patent Information
- Application Number
- CN202423146014.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-19
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2034-12-19
AI Technical Summary
When processing concave lenses on both sides using existing glass lens molds, the glass lens blank is prone to deviating from the center position, resulting in poor quality of the finished product.
The self-centering mold design includes an upper mold, a lower mold, an inner sleeve, an outer sleeve, a centering ring, and ejector pins. The position of the glass lens blank is defined by the annular array distribution of the ejector pins and the elastic force of the spring, ensuring that it remains centered during the molding process.
It effectively prevents glass lens blanks from deviating from the center during the molding process, ensuring lens molding quality and improving product yield.
Smart Images
Figure CN223592591U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to glass lens mould technical field, concretely relates to a glass lens self-centering mould. BACKGROUND
[0002] Glass lens mould is the important tool of manufacturing glass lens, and the mould can ensure that the shape, size and surface quality of glass lens reach the design requirement, and in the use process, the glass lens blank is generally put into the mould accommodating cavity, the glass lens blank and the mould are heated together, and then the mould is pressed by the mould pressing machine to make the glass lens blank form. However, the existing glass lens mould still has some problems in use, and when some part of the existing glass lens blank needs to be processed into a lens with two outward convex surfaces, since the mould is provided with a groove, the glass lens blank will not deviate from the center position due to the limitation of the groove, but when some part of the glass lens blank needs to be processed into a lens with two inward concave surfaces (as shown in the figure), the corresponding mould is provided with a protrusion, and the glass lens blank is easy to deviate from the center position during mould pressing, which finally leads to the failure to form a good upper and lower concave surface, and affects the product yield. Figure 11 UTILITY MODEL CONTENTS
[0003] The technical problem solved by the utility model is that the glass lens self-centering mould can limit the position of the glass lens blank during mould pressing work.
[0004] TECHNICAL SCHEME: In order to solve the above technical problem, the utility model adopts the following technical scheme:
[0005] A glass lens self-centering mould, which comprises an upper mould, a lower mould corresponding to the upper mould, an inner sleeve sleeved outside the upper mould and the lower mould, an outer sleeve sleeved outside the inner sleeve, a centering ring sleeved outside the outer sleeve and a top rod movably connected with the centering ring, the top rod is movably connected with the centering ring through a first spring, a plurality of top rods are arranged in a ring array on the centering ring, a first through hole is arranged on the inner sleeve for the top rod to penetrate, and a second through hole is arranged on the outer sleeve for the top rod to penetrate.
[0006] Further, the top rod comprises a top pin, a second spring connected with the top pin and a top cylinder connected with the second spring.
[0007] Further, the top rod further comprises one or more than one telescopic joint, and the telescopic joint enters the top cylinder when being contracted.
[0008] Further, a first through groove is arranged on the outer circumferential side of the centering ring at a position corresponding to the top rod, a second through groove is arranged on the upper end face of the centering ring at a position corresponding to the top rod and in communication with the first through groove, and the first spring is arranged in the second through groove.
[0009] Further, the second through slot is an arc-shaped slot.
[0010] Further, the ejector pin is provided with a guide bolt corresponding to the second through slot, and the first spring is connected with the guide bolt.
[0011] Further, the upper die comprises an upper die plate, an upper die base connected with the upper die plate and having a smaller diameter than the upper die plate, and a first protrusion arranged on the upper die base, and the lower die comprises a lower die plate, a lower die base connected with the lower die plate and having a smaller diameter than the lower die plate, and a second protrusion arranged on the lower die base.
[0012] Further, the inner sleeve is sleeved outside the upper die base and the lower die base, and the outer sleeve is sleeved outside the upper die plate and the lower die plate.
[0013] Further, when the upper die presses the glass lens to a predetermined position, the height of the upper die plate is not higher than the height of the upper end surface of the outer sleeve.
[0014] Beneficial effects: compared with the prior art, the utility model has the following advantages:
[0015] 1. The centering ring is arranged outside the outer sleeve, the ejector pin is movably connected to the centering ring, the plurality of ejector pins are arranged in a ring array on the centering ring, the position of the glass lens blank is limited by the ejector pin, and the ring array of the ejector pin achieves the self-centering effect.
[0016] 2. The ejector pin comprises a top pin, a second spring, a top sleeve, an extension joint and a guide bolt, the top pin always maintains pressure on the glass lens blank under the elastic force of the second spring, the extension joint is retractable, and is suitable for positioning glass lens blanks of various diameters.
[0017] 3. The guide bolt of the ejector pin is movably connected to the centering ring through the first spring, the centering ring is provided with a first through slot and a second through slot, the first spring is arranged in the second through slot, the guide bolt is located in the second through slot, and the first spring forms support for the ejector pin under the elastic force, so that the stability of the ejector pin in the radial direction is ensured, and stable support for the glass lens blank is formed. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 is a schematic diagram of the mold shape structure of the embodiment of the utility model;
[0019] Figure 2 is a sectional view of the mold of the embodiment;
[0020] Figure 3 is a three-dimensional assembly view of the mold of the embodiment;
[0021] Figure 4 is a schematic diagram of the upper die structure of the embodiment;
[0022] Figure 5 is the lower die structure schematic diagram of the embodiment;
[0023] Figure 6 is the inner sleeve structure schematic diagram of the embodiment;
[0024] Figure 7 is the outer sleeve structure schematic diagram of the embodiment;
[0025] Figure 8 is the centering ring structure schematic diagram of the embodiment;
[0026] Figure 9 is the ejector rod and the first spring structure schematic diagram of the embodiment;
[0027] Figure 10 is the ejector rod sectional view of the embodiment;
[0028] Figure 11 is the schematic diagram of the glass lens blank after being molded. DETAILED DESCRIPTION
[0029] The utility model will be further illustrated in combination with specific embodiments, the embodiments are implemented on the premise of the technical scheme of the utility model, and it should be understood that these embodiments are only used for illustrating the utility model and are not used for limiting the scope of the utility model.
[0030] As shown in Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 11 , a glass lens self-centering mold for molding a glass lens blank 9, the self-centering mold comprises an upper die 1, a lower die 2, an inner sleeve 3, an outer sleeve 4, a centering ring 5, an ejector rod 6 and a first spring 7, the upper die 1 comprises an upper die plate 11, an upper die table 12 and a first protrusion 13, the upper die plate 11 is a circular plate, the upper die table 12 is a circular table and is connected to the lower end face of the upper die plate 11, the diameter of the upper die table 12 is smaller than the diameter of the upper die plate 11, the first protrusion 13 is arranged on the lower end face of the upper die table 12, the upper die 1 and the lower die 2 are arranged in a corresponding manner, the lower die 2 comprises a lower die plate 21, a lower die table 22 and a second protrusion 23, the lower die plate 21 is a circular plate same as the upper die plate 11, the lower die table 22 is a circular table same in diameter with the upper die table 12, the lower die table 22 is connected to the upper end face of the lower die plate 21, and the second protrusion 23 is arranged on the upper end face of the lower die table 22. The protrusion height and the arc of the first protrusion 13 and the second protrusion 23 are set according to the finished product of the lens 91 to be processed, and the first protrusion 13 and the second protrusion 23 are used to form the upper concave surface 901 and the lower concave surface 902 of the lens 91.
[0031] As shown in Figure 1 , Figure 2、 Figure 3 、 Figure 6 and Figure 7 As shown in the drawings, the inner sleeve 3 is sleeved outside the upper die 1 and the lower die 2, the inner sleeve 3 is cylindrical, the inner diameter of the inner sleeve 3 is equal to the outer diameter of the upper die table 12 and the lower die table 22, and the outer diameter of the inner sleeve 3 is equal to the diameter of the upper die plate 11 and the lower die plate 21, so that the inner sleeve 3 is sleeved outside the upper die table 12 and the lower die table 22, and the area between the upper die table 12, the lower die table 22 and the inner sleeve 3 is a containing cavity for containing the glass lens blank 9. The outer sleeve 4 is sleeved outside the inner sleeve 3 and is sleeved outside the upper die plate 11 and the lower die plate 21, the inner diameter of the outer sleeve 4 is the same as the outer diameter of the inner sleeve 3, so that the outer sleeve 4 is sleeved outside the whole formed by the upper die 1, the lower die 2 and the inner sleeve 3.
[0032] As shown in the drawings, Figure 1 、 Figure 2 、 Figure 3 、 Figure 6 、 Figure 7 and Figure 8 The centering ring 5 is sleeved outside the outer sleeve 4, the centering ring 5 is located at the middle of the outer sleeve 4 in height, the inner diameter of the centering ring 5 is the same as the outer diameter of the outer sleeve 4, the ejector pin 6 is movably connected with the centering ring 5, and the ejector pin 6 is provided in three, the three ejector pins 6 are arranged in a ring array on the centering ring 5, the outer circumferential side of the centering ring 5 is provided with a first through groove 51 at a position corresponding to the ejector pin 6, and the three first through grooves 51 are also arranged in a ring array, the first through groove 51 extends along the circumferential direction of the centering ring 5, the ejector pin 6 penetrates the first through groove 51 along the radial direction of the centering ring 5 and then enters the inner ring of the centering ring 5, the inner sleeve 3 is provided with a first through hole 31 for the ejector pin 6 to penetrate, and the outer sleeve 4 is provided with a second through hole 41 for the ejector pin 6 to penetrate, so that the top end of the ejector pin 6 is located in the containing cavity, the height of the ejector pin 6 is the same as the middle height of the containing cavity, and the glass lens blank 9 is conveniently pushed from all around. The upper end face of the centering ring 5 is provided with three second through grooves 52, the positions of the second through grooves 52 correspond to the positions of the first through grooves 51, and the second through grooves 52 are communicated with the first through grooves 51, the second through groove 52 is an arc-shaped groove, one end of the second through groove 52 close to the inner ring of the centering ring 5 is a first end, the other end of the second through groove 52 close to the outer ring of the centering ring 5 is a second end, the first spring 7 is arranged in the second through groove 52, one end of the first spring 7 is connected with the inner side wall of the second end of the second through groove 52, and the other end of the first spring 7 is connected with the ejector pin 6, so that the ejector pin 6 is movably connected with the centering ring 5 through the first spring 7, and the three ejector pins 6 support the centering ring 5 at a predetermined height because the three ejector pins 6 penetrate the inner sleeve 3 and the outer sleeve 4.
[0033] As shown in the drawings, Figure 2 、 Figure 3 、 Figure 8 、 Figure 9 and Figure 10As shown, the top rod 6 includes a top pin 61, a second spring 62, a top cylinder 63, an expansion joint 64 and a guide bolt 65. The top pin 61 is cylindrical, and the head end of the top pin 61 is used to abut against the side edge of the glass lens blank 9. The rear end of the top pin 61 is connected with the top cylinder 63 through the second spring 62. The top cylinder 63 is cylindrical, and two expansion joints 64 (the number of expansion joints 64 is set according to the needs) are movably connected on the top cylinder 63. The head end expansion joint 64 is sleeved on the top pin 61, and is used to guide the movement of the top pin 61. The top pin 61 abuts against the side edge of the glass lens blank 9 under the elastic force of the second spring 62. When the glass lens blank 9 is deformed under pressure, the top pin 61 will be retracted back against the elastic force of the second spring 62 when it is subjected to pressure. The glass lens blank 9 continues to deform and pushes the expansion joint 64 to retract. The expansion joint 64 retracts into the top cylinder 63. The guide bolt 65 is connected to the top cylinder 63 and is perpendicular to the top rod 6. The guide bolt 65 penetrates the second through groove 52 from bottom to top. The guide bolt 65 is cylindrical as a whole and corresponds to the second through groove 52. The first spring 7 is connected with the guide bolt 65. Under the elastic force of the first spring 7, the first spring 7 abuts against the first end of the second through groove 52. When the top rod 6 is subjected to a radial outward thrust, since the guide bolt 65 is limited by the second through groove 52 and cannot move in the radial direction, it can only move outward in an arc along the direction of the second through groove 52. The guide bolt 65 supports the top rod 6 in the radial direction, which is conducive to the top rod 6 maintaining appropriate pressure on the glass lens blank 9 when the glass lens blank 9 is deformed, and ensures the stability of the position of the glass lens blank 9 during the deformation process.
[0034] In use, the mold is placed in the mold pressing machine as a whole. After the mold is heated, the pressing plate is pressed on the mold to mold the internal glass lens blank 9. When the upper mold 1 presses the glass lens blank 9 to the predetermined position, the height of the upper end surface of the upper mold plate 11 is equal to the height of the upper end surface of the outer sleeve 4, so that the pressing plate of the mold pressing machine is pressed on the upper end surface of the outer sleeve 4 and cannot continue to press the upper mold 1 downward. The outer sleeve 4 limits the pressing plate and prevents the pressing plate from pressing the upper mold 1 downward excessively, which affects the forming quality of the glass lens blank 9. The first protrusion 13 of the upper mold 1 is pressed on the glass lens blank 9. The glass lens blank 9 deforms from the center to the periphery in the accommodating cavity. The side edge of the glass lens blank 9 pushes the top pin 61, and the expansion joint 64 is pushed to continue to deform. Due to the elastic force of the second spring 62 and the first spring 7, the three top rods 6 always limit the glass lens blank 9, so that the glass lens blank 9 always remains at the center position, which is conducive to forming good upper concave surface 901 and lower concave surface 902 (as shown in FIG. 9B) on the lens 91 after molding. Figure 11 After molding, the product lens 91 is further subjected to a core taking or polishing step (the outer peripheral side of the lens 91 after molding may be irregular or have a shallow concave hole left by the top rod 6), to form a glass lens with regular edges.
[0035] The above merely is preferred implementation manner of the present application, it should be pointed out, for ordinary skilled person in the technical field, on the premise of not departing from the principle of the present application, can also make several improvements and refinements, these improvements and refinements also should be regarded as the protection scope of the present application.
Claims
1. A glass lens self-centering mold characterized by, The mold includes an upper mold (1), a lower mold (2) corresponding to the upper mold (1), an inner sleeve (3) sleeved outside the upper mold (1) and the lower mold (2), an outer sleeve (4) sleeved outside the inner sleeve (3), a centering ring (5) sleeved outside the outer sleeve (4), and a ejector rod (6) movably connected with the centering ring (5), the ejector rod (6) is movably connected with the centering ring (5) through a first spring (7), the ejector rod (6) is provided with a plurality of ejector rods (6), the plurality of ejector rods (6) are arranged in a ring array on the centering ring (5), the inner sleeve (3) is provided with a first through hole (31) for the ejector rod (6) to penetrate, and the outer sleeve (4) is provided with a second through hole (41) for the ejector rod (6) to penetrate.
2. The glass lens self-centering mold of claim 1, wherein, The ejector rod (6) includes a ejector pin (61), a second spring (62) connected with the ejector pin (61), and a ejector barrel (63) connected with the second spring (62).
3. The glass lens self-centering mold of claim 2, wherein, The ejector rod (6) further includes one or more telescopic sections (64), which are retracted into the ejector barrel (63).
4. The glass lens self-centering mold of claim 2, wherein, The outer circumferential side of the centering ring (5) is provided with a first through groove (51) at a position corresponding to the ejector rod (6), and the upper end surface of the centering ring (5) is provided with a second through groove (52) in communication with the first through groove (51) at a position corresponding to the ejector rod (6), and the first spring (7) is arranged in the second through groove (52).
5. The glass lens self-centering mold of claim 4, wherein, The second through groove (52) is an arc-shaped groove.
6. The glass lens self-centering mold of claim 5, wherein, The ejector rod (6) is provided with a guide bolt (65) corresponding to the second through groove (52), and the first spring (7) is connected with the guide bolt (65).
7. The glass lens self-centering mold of claim 1, wherein, The upper mold (1) includes an upper mold plate (11), an upper mold base (12) connected with the upper mold plate (11) and having a smaller diameter than the upper mold plate (11), and a first protrusion (13) arranged on the upper mold base (12), and the lower mold (2) includes a lower mold plate (21), a lower mold base (22) connected with the lower mold plate (21) and having a smaller diameter than the lower mold plate (21), and a second protrusion (23) arranged on the lower mold base (22).
8. The glass lens self-centering mold of claim 7, wherein, The inner sleeve (3) is sleeved outside the upper mold base (12) and the lower mold base (22), and the outer sleeve (4) is sleeved outside the upper mold plate (11) and the lower mold plate (21).
9. The glass lens self-centering mold of claim 8, wherein, When the upper mold (1) presses the glass lens to a predetermined position, the height of the upper mold plate (11) is not higher than the height of the upper end surface of the outer sleeve (4).