Dual-mode lens casting head and lens casting machine

Abstract

This application discloses a dual-mode lens casting head and a lens casting machine. The dual-mode lens casting head includes: a casting head for casting monomer material into the cavity of a lens mold; and an angle adjustment mechanism connected to and driving the casting head, causing the axis of the casting head to switch between a vertical direction and a direction inclined relative to the vertical direction. The first position is when the axis of the casting head is vertical, used for casting presbyopic lenses; the second position is when the axis of the casting head has an angle relative to the vertical direction, used for casting myopia lenses. Through this configuration, the casting head can switch between inclined and vertical modes, thus enabling the lens casting machine to be suitable for casting both myopia and presbyopic lenses.

Description

Technical Field

[0001] This application relates to the field of lens casting technology, and in particular to a dual-mode lens casting head and a lens casting machine. Background Technology

[0002] Lenses are manufactured by casting, specifically by depositing and confining monomeric materials in cavities between relative mold components (lens mold A and mold B).

[0003] In the casting process of myopia lenses (concave lenses), the casting head is set at an angle: the myopia lens is thin in the center and thick at the edge. If the casting is vertical, the raw material will quickly impact the center of the mold, which can easily cause local accumulation or collapse. The angled casting head can disperse the impact force, so that the raw material flows evenly to the edge, reduce the generation of air bubbles, and increase the yield.

[0004] In the casting process of reading lenses (convex lenses), the casting head is set vertically: when casting vertically, the air bubbles at the top of the mold cavity will naturally float to the casting port and be discharged under the action of gravity, avoiding the failure of the lens due to the retention of air bubbles in the central area.

[0005] Therefore, this application designs a dual-mode lens casting head, which allows the casting head to switch between two modes: tilting and vertical setting. This enables the lens casting machine to be suitable for both myopia lenses and presbyopia lenses. Summary of the Invention

[0006] To address the shortcomings of existing technologies, the purpose of this application is to provide a dual-mode lens casting head and a lens casting machine, which allows the casting head to switch between two modes: tilting and vertical. This enables the lens casting machine to be suitable for casting both myopia lenses and presbyopia lenses.

[0007] To achieve the above objectives, this application adopts the following technical solution:

[0008] This application provides a dual-mode lens casting head, which includes: a casting head for casting monomer material into a lens mold cavity; and an angle adjustment mechanism connected to and driving the casting head to switch the axis of the casting head between a vertical direction and a direction inclined relative to the vertical direction. The first position is when the axis of the casting head is in the vertical direction, used for casting presbyopic lenses; the second position is when the axis of the casting head has an angle relative to the vertical direction, used for casting myopia lenses.

[0009] As a preferred technical solution, the angle adjustment mechanism includes: a mounting plate; an angle adjustment cylinder, the tail end of which is rotatably connected to the mounting plate via a small shaft, and the front end of which is oscillatingly connected to the pouring head via a spherical bearing; the angle adjustment cylinder extends and retracts to drive the pouring head to oscillate between a first position and a second position.

[0010] As a preferred technical solution, the mounting plate is provided with an arc-shaped groove, and the small shaft assembly bearing of the pouring head is embedded in the arc-shaped groove to limit the pouring head to swing only in a single plane.

[0011] As a preferred technical solution, the angle adjustment mechanism also includes a position sensor, which is used to detect whether the pouring head has reached the first position or the second position.

[0012] As a preferred technical solution, when the pouring head is in the second position, the angle between the axis of the pouring head and the vertical direction is an acute angle.

[0013] This application provides a lens casting machine, which includes the aforementioned dual-mode lens casting head.

[0014] Compared with the prior art, the beneficial effects of this application are as follows:

[0015] The dual-mode lens casting head of this application drives the casting head to rotate between a first position and a second position through an angle adjustment mechanism, so that the casting head can switch between two modes: tilt setting and vertical setting. This allows the lens casting machine to be suitable for casting both myopia lenses and presbyopia lenses. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the dual-mode lens casting head of this application;

[0017] Figure 2 This is a structural schematic diagram of the dual-mode lens casting head from another perspective of this application.

[0018] Figure 3 A diagram showing the position of the pouring head during the pouring of reading lenses;

[0019] Figure 4 A diagram showing the position of the pouring head during the pouring of myopia lenses;

[0020] Among them: 1. Dual-mode lens casting head; 11. Casting head; 12. Angle adjustment mechanism; 121. Mounting plate; 1211. Arc-shaped slide groove; 122. Angle adjustment cylinder. Detailed Implementation

[0021] To enable those skilled in the art to better understand the present application, the technical solutions in specific embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

[0022] like Figure 1 and Figure 2 As shown, this application provides a dual-mode lens casting head 1, which includes a casting head 11 and an angle adjustment mechanism 12.

[0023] The pouring head 11 is used to pour monomer material into the cavity of the lens mold. The angle adjustment mechanism 12 is connected to and drives the pouring head 11, so that the axis of the pouring head 11 switches between the vertical direction and the direction inclined relative to the vertical direction.

[0024] like Figure 3 and Figure 4 As shown, the first position is when the axis of the pouring head 11 is in the vertical direction, which is used to pour reading lenses; the second position is when the axis of the pouring head 11 has an angle relative to the vertical direction, which is used to pour myopia lenses.

[0025] A liquid level detection module is provided on one side of the lens mold to detect the liquid level position of the monomer material inside the lens mold. The liquid level position is used to control the pouring speed of the pouring head 11 and to control the pouring head 11 to stop pouring.

[0026] The dual-mode lens casting head 1 of this application drives the casting head 11 to rotate between a first position and a second position through an angle adjustment mechanism 12, so that the casting head 11 can switch between two modes: tilt setting and vertical setting. This allows the lens casting machine to be adapted to both the casting of myopia lenses and the casting of presbyopia lenses.

[0027] Furthermore, the angle adjustment mechanism 12 includes a mounting plate 121 and an angle adjustment cylinder 122. The tail end of the angle adjustment cylinder 122 is rotatably connected to the mounting plate 121 via a small shaft, and the front end is rotatably connected to the pouring head 11 via a spherical bearing. The angle adjustment cylinder 122 extends and retracts to drive the pouring head 11 to swing between a first position and a second position.

[0028] It should be noted that the angle adjustment mechanism 12 can also be configured to include: a rotary motor and a gear transmission mechanism or a selector cylinder transmission. The above mechanisms can be connected to the pouring head 11 to drive the pouring head 11 to rotate between the first position and the second position.

[0029] Furthermore, the mounting plate 121 is provided with an arc-shaped groove 1211, and the small shaft assembly bearing of the pouring head 11 is embedded in the arc-shaped groove 1211 to limit the pouring head 11 to swing only in a single plane.

[0030] Furthermore, the angle adjustment mechanism 12 also includes a position sensor, which is used to detect whether the pouring head 11 has reached the first position or the second position. The position sensor adds closed-loop control logic, improving the positioning accuracy of the pouring head 11.

[0031] Furthermore, when the pouring head 11 is in the second position, the angle between the axis of the pouring head 11 and the vertical direction is an acute angle, which can balance the dispersion of pouring impact force and the accuracy of liquid level detection.

[0032] This application provides a lens casting machine, which includes the above-mentioned dual-mode lens casting head 1 and a controller, the controller being connected to an angle adjustment mechanism 12 and a position sensor.

[0033] The working principle of this lens casting machine is as follows: the controller receives a lens type instruction; if it is a reading lens, it controls the angle adjustment mechanism 12 to drive the casting head 11 to the vertical direction; if it is a nearsighted lens, it drives the casting head 11 to an angle with the vertical direction.

[0034] Acute angle included; the controller starts the pouring program after confirming that the pouring head 11 is in place through the position sensor.

[0035] Other structures for the lens casting machine can be referenced from: Chinese patent application CN115230209B, "Fully Automatic Lens Casting Machine," in which the "lens casting mechanism" is replaced with the dual-mode lens casting head 1 of this application; or Chinese patent application CN107745470B, "Fully Automatic Mold Closing and Filling Integrated Machine," in which the "automatic filling mechanism" is replaced with the dual-mode lens casting head 1 of this application; or Chinese patent application CN105235154B, "A Lens Mold Filling Machine," in which the "filling device" is replaced with the dual-mode lens casting head 1 of this application.

[0036] It should be noted that the terms "first," "second," and similar terms used in this application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, "a" or "one," and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. "A plurality" or "several" indicates at least two. Unless otherwise stated, terms such as "front," "back," "left," "right," "lower," and / or "upper" are for illustrative purposes only and are not limited to a location or spatial orientation. Terms such as "comprising" or "including" indicate that the elements or objects preceding "comprising" encompass the elements or objects listed following "comprising" or "including" and their equivalents, and do not exclude other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect.

[0037] The singular forms “a,” “the,” and “the” used in this application specification and appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0038] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A dual mode lens casting head characterized by, The dual-mode lens casting head includes: A pouring head is used to pour monomer material into the cavity of a lens mold; An angle adjustment mechanism is connected to and drives the pouring head, so that the axis of the pouring head switches between the vertical direction and the direction inclined relative to the vertical direction; The first position is when the axis of the pouring head is in the vertical direction, which is used to pour reading lenses; the second position is when the axis of the pouring head has an angle relative to the vertical direction, which is used to pour myopia lenses.

2. The dual mode lens-pouring head of claim 1, wherein, The angle adjustment mechanism includes: Mounting plate; An angle adjustment cylinder, the tail end of which is rotatably connected to the mounting plate via a small shaft, and the front end of which is oscillatingly connected to the pouring head via a spherical bearing; The angle adjustment cylinder extends and retracts to drive the pouring head to swing between a first position and a second position.

3. The dual mode lens-pouring machine head of claim 2, wherein, The mounting plate is provided with an arc-shaped groove, and the rotating shaft of the pouring head is embedded in the arc-shaped groove to restrict the pouring head to rotate only in a single plane.

4. The dual mode lens-pouring head of any one of claims 1-3, wherein, The angle adjustment mechanism also includes a position sensor, which is used to detect whether the pouring head has reached the first position or the second position.

5. The dual mode lens-pouring head of claim 1, wherein, When the pouring head is in the second position, the angle between the axis of the pouring head and the vertical direction is an acute angle.

6. A lens casting machine characterized by, The lens casting machine includes the dual-mode lens casting head as described in any one of claims 1-5.

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