CN211522008U

CN211522008U - High-precision glass lens hot-pressing mold

Info

Publication number: CN211522008U
Application number: CN201922180828.0U
Authority: CN
Inventors: 李婧怡
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-12-09
Filing date: 2019-12-09
Publication date: 2020-09-18
Anticipated expiration: 2029-12-09

Abstract

The utility model discloses a high accuracy glass lens hot pressing mould, including setting up the guide pin bushing on the bottom plate, one side is equipped with movable clamp plate in the guide pin bushing, has the centering contact surface of at least a pair of symmetry on the just right opposite side lateral wall of movable clamp plate, movable clamp plate and a pair of centering contact surface and the centering structure who constitutes triangle-shaped, movable clamp plate pass through the cylinder and promote, the upper and lower mould core in the guide pin bushing offsets with the centering contact surface, forms triangle-shaped location, eliminates the clearance and makes the complete centering of upper and lower mould core simultaneously. The utility model has the advantages and beneficial effects that: the original circular positioning structure is replaced by triangular positioning, the limit manufacturing and matching precision requirements of the original mold are overcome, the cooling time is short, the repeated use efficiency is high, the number of the molds can be reduced when the molds are manufactured, the investment cost is reduced, and the benefit is improved; the upper and lower dies always keep parallel movement with the three contact lines, the friction is uniform, and the precision can be still kept after abrasion.

Description

High-precision glass lens hot-pressing mold

Technical Field

The utility model belongs to the technical field of the optical lens processing, concretely relates to glass lens hot pressing mold with go up lower mould high accuracy to well structure.

Background

The existing hot-pressing die centering mechanism adopts a circular guide sleeve to perform upper and lower die centering, and a fit clearance of 1-2 microns is formed between an upper die and a lower die and the die guide sleeve at normal temperature. However, when the glass lens is manufactured and pressed, the mold is heated to about 500 ℃, so that the gap between the guide sleeve and the upper mold and the lower mold is enlarged to 2-3 micrometers, and the axial centers of the upper mold and the lower mold are deviated or even form an angle in the pressing process, so that the optical axes of the front side and the back side of the manufactured lens are not concentric, the product cannot reach the optimal state, and the future imaging effect of the lens is influenced. The processing precision and the matching finish surface of the die adopting the circular guide sleeve structure almost reach the processing limit during manufacturing. Receive the influence of expend with heat and contract with cold in the use, when the axis of upper and lower guide pin bushing produced the angle with the guide pin bushing axis, can make upper and lower mould edge and guide pin bushing inner wall produce uncertain unilateral friction, reduced the life of mould.

On the other hand, the existing mold needs to be placed on one side for cooling after the product is pressed, so that a plurality of molds need to be manufactured for circulation, and the manufacturing cost of the molds is very high. Structurally, the upper die and the lower die are matched with the guide sleeve by 2-3 microns, no heat dissipation space exists, and heat dissipation is slow.

Disclosure of Invention

An object of the utility model is to overcome the defect among the prior art, provide a glass lens hot pressing mould goes up lower mould high accuracy to well structure.

The technical scheme of the utility model as follows:

a high-precision glass lens hot-pressing mold comprises a guide sleeve arranged on a bottom plate, wherein a hot-pressing cavity is arranged in the guide sleeve, a round lower mold core is arranged at the bottom in the hot-pressing cavity, the lower mold core is matched with a matched upper mold core to carry out hot pressing on a glass lens, a movable pressing plate is arranged on the side wall of one side of the hot-pressing cavity, at least one pair of symmetrical centering contact surfaces is arranged on the side wall of the other side opposite to the movable pressing plate, the movable pressing plate and the pair of centering contact surfaces form a triangular centering structure, the movable pressing plate is connected with an air cylinder arranged beside the guide sleeve through at least 2 air cylinder ejector rods horizontally penetrating through the guide sleeve, the air cylinder pushes the movable pressing plate, the movable pressing plate enables the upper mold core and the lower mold core in the guide sleeve to be abutted against the centering contact surfaces, the appearance of the upper mold core and the lower mold core, eliminating the gap and simultaneously completely centering the upper die core and the lower die core.

The centering contact surface can be a plane or an arc surface of the inner wall of the guide sleeve, and can also be a raised contact block on the inner wall of the guide sleeve.

The movable pressing plate is arranged in the pressing plate groove on the guide sleeve.

The inner wall of the guide sleeve beside the centering structure expands outwards to form a heat dissipation air duct in the hot-pressing cavity.

The guide sleeve at the radiating air duct is outwards provided with radiating holes, so that when the hot air on the inner wall rises, the air can be conveniently sucked into the air duct.

And the guide sleeve is provided with a ceramic heat dissipation ring.

The ceramic heat dissipation ring avoids the heat dissipation holes in the guide sleeve, and the heat dissipation holes are formed in the bottom of the heat dissipation air duct.

And a fixing plate is arranged on the bottom plate of the cylinder opposite to the guide sleeve and is abutted against the guide sleeve.

The fixed plate is V-shaped, two sides of the V-shaped fixed plate are abutted to the guide sleeve, the middle of the fixed plate and the guide sleeve form an outer heat dissipation air channel, and the outer heat dissipation air channel is communicated with a heat dissipation air channel between the centering contact surface through heat dissipation holes.

The utility model has the advantages and beneficial effects that:

1. the triangular positioning replaces the original round positioning structure, so that the gap between the die and the guide sleeve is eliminated, and the matching precision requirement of the original die is overcome;

2. structurally, the influence of temperature on the matching of the die is overcome, the positioning precision of the die is unchanged at normal temperature and high temperature, and the problem of product quality reduction caused by the fact that the matching precision of the die is increased due to thermal expansion when the circular positioning structure is in a high-temperature working state is solved;

3. the guide sleeve is in single three-line contact with the upper die and the lower die, other parts are suspended to form a heat dissipation air duct, air circulation is facilitated, cooling time is short, repeated use efficiency is high, the number of dies can be reduced when the dies are manufactured, investment cost is reduced, and benefits are improved;

4. the edges of the upper die and the lower die cannot generate unilateral friction with the inner wall of the triangular guide sleeve, the upper die and the lower die always keep parallel movement with the three contact lines, the friction is uniform, the precision can still be kept after the upper die and the lower die are abraded, the service life of the die is prolonged under the condition that the precision is not reduced, and the cost is reduced.

Drawings

Fig. 1 is a top view of a high-precision glass lens hot-pressing mold provided by the present invention;

FIG. 2 is a cross-sectional view of FIG. 1;

fig. 3 is a top view of another embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to specific examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the two components can be directly connected or indirectly connected through an intermediate medium, and the two components can be communicated with each other. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

As shown in fig. 1 and 2, a high-precision glass lens hot-pressing mold comprises a guide sleeve 200 arranged on a bottom plate 100, a hot-pressing cavity 210 is arranged in the guide sleeve, a circular lower mold core 310 is arranged at the bottom in the hot-pressing cavity, the lower mold core is matched with a matched upper mold core 320 to carry out hot pressing on a glass lens 330, a movable press plate 400 is arranged on the side wall of one side of the hot-pressing cavity, at least one pair of symmetrical centering contact surfaces 211 is arranged on the side wall of the other side opposite to the movable press plate, the movable press plate 400 and the pair of centering contact surfaces 211 form a triangular centering structure, the movable press plate 400 is connected with a cylinder 502 arranged beside the guide sleeve through at least 2 cylinder ejector rods 501 horizontally penetrating through the guide sleeve 200, the cylinder 502 pushes the movable press plate 400, the movable press plate 400 pushes the upper mold core 310 and the lower mold core 320 in the guide sleeve 200 against the centering contact surfaces 211, the appearance of the upper and lower, the upper die core and the lower die core form triangular positioning with the centering structure, and the gap is eliminated while the upper die core and the lower die core are completely centered.

The centering contact surface 211 may be a flat surface or a curved surface of the inner wall of the guide sleeve 200.

The inner wall of the guide sleeve 200 beside the centering structure is expanded outwards, and a heat dissipation air duct 220 is formed in the hot-pressing cavity.

The guide sleeve at the heat dissipation air duct 220 is provided with heat dissipation holes 221 outwards, so that when hot air on the inner wall rises, external air can be sucked conveniently.

The guide sleeve 200 is provided with a ceramic heat dissipation ring 700.

The ceramic heat dissipation ring 700 avoids the heat dissipation holes 221 on the guide sleeve, and the heat dissipation holes 221 are arranged at the bottom of the heat dissipation air duct 220.

The bottom plate 100 on the opposite side of the cylinder 502 relative to the guide sleeve is provided with a fixing plate 600, and the fixing plate 600 abuts against the guide sleeve 200.

The fixing plate 600 is V-shaped, two sides of the V-shaped fixing plate abut against the guide sleeve 200, the middle of the fixing plate and the guide sleeve form an outer heat dissipation air duct 610, and the heat dissipation air duct between the outer heat dissipation air duct 610 and the centering contact surface 211 is communicated through heat dissipation holes.

As shown in fig. 3, the centering contact surface can also be a raised contact block 212 on the inner wall of the guide sleeve 200, so as to better ensure that the centering contact structure makes linear contact with the upper and lower mold cores, and simultaneously increase the volume of the heat dissipation air duct.

The above detailed description is provided for the examples of the present invention, but the above description is only for the preferred embodiments of the present invention, and should not be considered as limiting the scope of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims

1. A high-precision glass lens hot-pressing mould comprises a guide sleeve arranged on a bottom plate, wherein a hot-pressing cavity is arranged in the guide sleeve, a round lower mold core is arranged at the bottom in the hot-pressing cavity, the lower mold core is matched with a matched upper mold core to carry out hot pressing on a glass lens, and the high-precision glass lens hot-pressing mould is characterized in that a movable pressing plate is arranged on the side wall of one side of the hot-pressing cavity, at least one pair of symmetrical centering contact surfaces is arranged on the side wall of the other side, which is just opposite to the movable pressing plate, the movable pressing plate and the pair of centering contact surfaces form a triangular centering structure, the movable pressing plate is connected with an air cylinder arranged beside the guide sleeve through at least 2 air cylinder ejector rods horizontally penetrating through the guide sleeve, the air cylinder pushes the movable pressing plate, the upper mold core and the lower mold core in the guide sleeve are abutted against the centering contact surfaces, the appearance of, eliminating the gap and simultaneously completely centering the upper die core and the lower die core.

2. A high precision glass lens hot pressing mold as claimed in claim 1, wherein the centering contact surface is a plane or a cambered surface of the inner wall of the guide sleeve, or a convex contact block on the inner wall of the guide sleeve.

3. A high precision glass lens hot pressing mold as in claim 1, wherein the movable platen is disposed in a platen groove on the guide sleeve.

4. A high precision glass lens hot pressing mold according to claim 1, characterized in that the inner wall of the guide sleeve beside the centering structure expands outward to form a heat dissipation air duct in the hot pressing cavity.

5. The mold for hot pressing of high precision glass lenses as claimed in claim 4, wherein the guide sleeve at the heat dissipation air duct is provided with heat dissipation holes, so that when the hot air on the inner wall rises, the air can be sucked in.

6. A high precision glass lens hot pressing mold as in claim 5, wherein the guide sleeve is provided with a ceramic heat dissipation ring.

7. A high precision glass lens hot pressing mold as claimed in claim 6, wherein the ceramic heat dissipation ring avoids the heat dissipation holes on the guide sleeve, and the heat dissipation holes are arranged at the bottom of the heat dissipation air duct.

8. A high precision glass lens hot pressing mold as in claim 7, wherein a fixing plate is provided on the bottom plate of the cylinder on the opposite side to the guide sleeve, the fixing plate abutting against the guide sleeve.

9. The mold for hot pressing of high precision glass lenses according to claim 8, wherein the fixing plate is V-shaped, two sides of the V-shaped fixing plate abut against the guide sleeve, the middle of the fixing plate and the guide sleeve form an outer heat dissipation air channel, and the outer heat dissipation air channel is connected to the heat dissipation air channel between the centering contact surface through heat dissipation holes.