Lens forming mold with vacuumizing structure

Abstract

The utility model discloses a lens forming mould with a vacuumizing structure, which comprises a base, a lower mould plate and an upper mould plate, the upper part of the base is fixedly connected with the lower mould plate, the four corners of the upper part of the lower mould plate are fixedly connected with limiting columns, the limiting columns are sleeved with the upper mould plate, and the upper mould plate is fixedly connected with the lower mould plate. The upper mold plate and the lower mold plate are closed in a covering mode, a boss is arranged in the middle of the top end of the lower mold plate, lens forming grooves are formed in the four corners in the boss, an air outlet pipe is fixedly connected to the middle of the boss, and a flange plate is fixedly connected to one end of the air outlet pipe. Sealing grooves are formed in the outer ring of the boss and the outer side of the bottom end of the upper die plate, and a sealing ring abuts against the position between the upper die plate and the lower die plate in a sealed mode. And gas is exhausted outwards through the vacuum pump pipe, the sealing ball body moves in the gas outlet pipe, and gas in the mold at the top end of the gas outlet pipe is exhausted through elastic back pressure of the supporting spring.

Description

Technical Field

[0001] The utility model relates to the technical field of lens molding, in particular to a lens molding mold with a vacuum structure. Background Art

[0002] Lens is a transparent material with one or more curved surfaces made of optical materials such as glass or resin.

[0003] In the prior art, lenses are injection-molded and extruded using a mold. Due to the non-negative pressure state inside the mold, gas is present during lens molding, affecting the molding effect of the lens. Currently, a vacuum pump is mainly used to extract the gas in the mold. However, due to the lack of a blocking structure in the pipeline, gas reflux occurs after the gas is discharged, and a vacuum negative pressure state cannot be achieved. Utility Model Content

[0004] The purpose of the present utility model is to provide a lens molding mold with a vacuum structure. The vacuum pump tube discharges the gas outward. At this time, the sealing sphere inside the outlet pipe moves, and the gas in the mold at the top end of the outlet pipe 11 is discharged through the elastic back pressure of the support spring. The gas between the lower mold plate 2 and the upper mold plate 4 is discharged outward through the outlet pipe 11.

[0005] To achieve the above-mentioned purpose, a lens forming mold with a vacuum structure is provided, comprising: a base, a lower mold plate and an upper mold plate, the upper part of the base is fixedly connected to the lower mold plate, the upper four corners of the lower mold plate are fixedly connected to limiting columns, the outer part of the limiting columns is sleeved with an upper mold plate, the upper mold plate and the lower mold plate cover each other, a boss is provided in the middle part of the top of the lower mold plate, the inner four corners of the boss are provided with lens forming grooves, the middle part of the boss is fixedly connected to an air outlet pipe, one end of the air outlet pipe is fixedly connected to a flange, the outer ring of the boss and the outer side of the bottom end of the upper mold plate are provided with sealing grooves, a sealing ring is provided for sealing contact between the upper mold plate and the lower mold plate, and the sealing ring and the sealing groove are plugged into each other.

[0006] According to the lens forming mold with a vacuum structure, one end of the air outlet pipe is fixedly connected to a fixing frame, and one side of the fixing frame is fixedly connected to a support spring. The support spring provides elastic support, which can resist and back-press the sealing sphere.

[0007] According to the lens forming mold with a vacuum structure, one end of the support spring is fixedly connected to a sealing sphere, and the outer side of the sealing sphere is equipped with an arc-shaped baffle. By setting the arc-shaped baffle and the sealing sphere to an arc shape, the sealing and blocking effect is better.

[0008] According to the lens forming mold with a vacuum structure, the arc-shaped baffle is fixedly connected to the inner wall of the air outlet pipe, and the arc-shaped baffle is arranged in a ring shape. By arranging the arc-shaped baffle in a ring shape, the sealing performance can be improved.

[0009] According to the lens molding mold with a vacuum structure, a plurality of injection molding tubes are fixedly connected to both sides of the middle of the top of the upper mold plate, and the number of injection molding tubes is four, and the bottom ends of the injection molding tubes cooperate with the lens molding groove.

[0010] According to the lens forming mold with a vacuum structure, a flow groove is provided at the top of the air outlet pipe. The flow groove is T-shaped and passes through the lens forming groove in an arc shape. By allowing the flow groove to pass through the lens forming groove, gas can be effectively discharged.

[0011] According to the lens forming mold with a vacuum pumping structure, a vacuum pump pipe is provided on one side of the flange, and gas extraction is achieved through the vacuum pump pipe.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] The utility model provides a support spring, a sealing sphere, an injection molding tube and a lens molding groove. The elastic support of the support spring causes the sealing sphere to contact the arc-shaped baffle to achieve a sealing effect, thereby completing vacuum blocking and preventing gas backflow.

[0014] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0016] Figure 1 This is a three-dimensional structural diagram of a lens forming mold with a vacuum structure according to the present invention;

[0017] Figure 2 This is a front view of a lens forming mold with a vacuum structure according to the present invention;

[0018] Figure 3 This is a top view of a lens forming mold with a vacuum structure according to the present invention;

[0019] Figure 4 This is a front view of the cross section of an air outlet pipe of a lens forming mold with a vacuum pumping structure according to the present invention.

[0020] In the figure: 1. Base; 2. Lower mold plate; 3. Limiting column; 4. Upper mold plate; 5. Injection tube; 6. Sealing ring; 7. Sealing groove; 8. Flange; 9. Flow groove; 10. Lens molding groove; 11. Exhaust pipe; 12. Vacuum pump tube; 13. Support spring; 14. Arc baffle; 15. Sealing sphere; 16. Fixing frame. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the utility model.

[0022] See also Figure 1-4 The utility model provides a technical solution: a lens molding mold with a vacuum structure, comprising: a base 1, a lower mold plate 2 and an upper mold plate 4, the upper part of the base 1 is fixedly connected to the lower mold plate 2, the upper four corners of the lower mold plate 2 are fixedly connected to the limiting pillars 3, the outer part of the limiting pillars 3 is sleeved with the upper mold plate 4, the upper mold plate 4 and the lower mold plate 2 are covered, a boss is provided at the top middle part of the lower mold plate 2, the inner four corners of the boss are provided with lens molding grooves 10, the lens is completed by resin casting molding through the lens molding grooves 10, the middle part of the boss is fixedly connected to an outlet pipe 11, the gas between the lower mold plate 2 and the upper mold plate 4 is discharged outwards through the outlet pipe 11, thereby achieving a vacuum state, and one end of the outlet pipe 11 is fixedly connected to the It is connected to a flange 8, and sealing grooves 7 are provided on the outer ring of the boss and the outer side of the bottom end of the upper mold plate 4. A sealing ring 6 is provided between the upper mold plate 4 and the lower mold plate 2 for sealing, and the sealing ring 6 and the sealing groove are plugged in and matched. By covering the upper mold plate 4 and the lower mold plate 2, a sealing ring 6 is arranged inside the sealing groove 9 to achieve a sealing effect. A number of injection molding tubes 5 are fixedly connected to both sides of the middle part of the top of the upper mold plate 4. The resin raw material is injected into the lens molding groove 10 through the injection molding tube 5 to complete the injection molding. There are four injection molding tubes 5, and the bottom end of the injection molding tube 5 is connected to the lens molding groove 10. A vacuum pump tube 12 is provided on one side of the flange 8. The vacuum pump tube 12 is connected to the flange 8 and discharges the gas outward through the outlet pipe 11.

[0023] One end of the air outlet pipe 11 is fixedly connected to a fixing frame 16, one side of which is fixedly connected to a support spring 13. One end of the support spring 13 is fixedly connected to a sealing ball 15. The outer side of the sealing ball 15 is equipped with an arc-shaped baffle 14, which is fixedly connected to the inner wall of the air outlet pipe 11 and is arranged in an annular shape. The fixing frame 16 structure fixes the support spring 13, while allowing gas to circulate. The fixing frame 16 adopts a hollow frame structure. When the vacuum pump stops working, the elastic support of the support spring 13 causes the sealing ball 15 to contact the arc-shaped baffle 14, achieving a sealing effect, thereby completing the vacuum blockage. A flow groove 9 is opened at the top of the air outlet pipe 11. The flow groove 9 is T-shaped. By setting the flow groove 9 as a T-shaped structure, the gas flows to the middle position of the mold. The flow groove 9 is arc-shaped and penetrates the lens molding groove 10.

[0024] Working principle: When in use, the upper mold plate 4 and the lower mold plate 4 at the bottom are covered and sealed through the internal sealing ring 6 of the sealing groove 9. At this time, the vacuum pump tube 12 discharges the gas outward. After the gas is discharged, the vacuum pump stops working. At this time, the elastic support of the support spring 13 causes the sealing ball 15 to contact the arc baffle 14 to achieve a sealing effect, thereby completing the vacuum blockage. Subsequently, the resin raw material is injected into the interior of the lens molding groove 10 through the injection tube 5 to complete the injection molding.

[0025] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A lens molding mold with a vacuum structure, comprising a base (1), a lower mold plate (2) and an upper mold plate (4), characterized in that: The base (1) is fixedly connected to a lower mold plate (2) above, and the four upper corners of the lower mold plate (2) are fixedly connected to limiting columns (3), and the outer portion of the limiting columns (3) is provided with an upper mold plate (4), and the upper mold plate (4) and the lower mold plate (2) are covered, and a boss is provided in the middle of the top of the lower mold plate (2), and the four inner corners of the boss are provided with lens forming grooves (10), and the middle of the boss is fixedly connected to an air outlet pipe (11), and one end of the air outlet pipe (11) is fixedly connected to a flange (8), and the The outer ring of the boss and the outer side of the bottom end of the upper mold plate (4) are both provided with a sealing groove (7), and a sealing ring (6) is provided between the upper mold plate (4) and the lower mold plate (2) for sealing, and the sealing ring (6) and the sealing groove (7) are plugged in and matched, and one end of the air outlet pipe (11) is fixedly connected to a fixing frame (16), one side of the fixing frame (16) is fixedly connected to a support spring (13), one end of the support spring (13) is fixedly connected to a sealing ball (15), and the outer side of the sealing ball (15) is matched with an arc-shaped baffle (14).

2. The lens forming mold with a vacuum structure according to claim 1, characterized in that: The arc-shaped baffle (14) is fixedly connected to the inner wall of the air outlet pipe (11), and the arc-shaped baffle (14) is arranged in a ring shape.

3. The lens forming mold with a vacuum structure according to claim 1, characterized in that: A plurality of injection molding tubes (5) are fixedly connected to both sides of the middle portion of the top of the upper mold plate (4), and the number of the injection molding tubes (5) is four. The bottom ends of the injection molding tubes (5) are matched with the lens molding groove (10).

4. The lens forming mold with a vacuum structure according to claim 1, characterized in that: A flow groove (9) is provided at the top end of the air outlet pipe (11), and the flow groove (9) is T-shaped. The flow groove (9) is arc-shaped and penetrates the lens forming groove (10).

5. The lens forming mold with a vacuum structure according to claim 1, characterized in that: A vacuum pump pipe (12) is provided on one side of the flange (8).

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