Pneumatic stripping resin lens injection mold

Abstract

The utility model relates to the technical field of injection molds, in particular to a pneumatic stripping resin lens injection mold which comprises an upper mold, a lower mold, an upper mold cavity, a lower mold cavity, a mold cavity assembly and a booster pump, the upper mold and the lower mold are matched in the vertical direction, and the upper mold cavity is fixedly arranged at the center of the bottom surface of the upper mold; a lower die cavity is formed in the center of the top face of the lower die, the upper die cavity and the lower die cavity are combined in the vertical direction, the die cavity assembly and the lower die cavity are detachably combined to form a closed die cavity, and the booster pump is fixedly installed on the upper die and communicated with the lower die cavity. A mold cavity of a traditional resin lens injection mold is arranged to be an integral mold cavity which is vertically combined, a lower mold cavity is reformed into a combined splicing type, and meanwhile, a traditional mode that a resin lens is ejected out through an ejector pin is changed into a mode that the resin lens is separated from the mold cavity through pneumatic stripping. And positive pressure is injected into the spliced mold cavity, so that the resin lens and the lower mold cavity are uniformly pressurized and separated, and demolding of the resin lens is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to a pneumatic stripping resin lens injection mold. Background Art

[0002] Resin lenses are a type of optical lens made from resin through a sophisticated chemical process, synthesized, and polished. They are widely used in various eyewear applications and offer several advantages: lightweight, impact-resistant, non-breakable, safe, comfortable to wear, easy to process, versatile, and superior to glass lenses in terms of UV absorption. Most existing eyewear lenses are made of resin. Resin lenses are in a liquid state before production. During production, the liquid resin is injected into a mold, cooled, and formed into a resin lens.

[0003] In the prior art, the injection mold consists of two parts, an upper mold and a lower mold. The upper mold is installed on the movable template of the injection molding machine, and the lower mold is installed on the fixed template of the injection molding machine. During injection molding, the upper mold and the lower mold are closed to form a pouring system and a cavity. When the mold is opened, the upper mold and the lower mold are separated to remove the resin lens. After the injection molding is completed, the existing injection mold usually needs to open the upper mold and the lower mold, and then use the ejector installed in the lower mold to eject the product upward, and then manually remove the lens after ejection. However, the ejector is likely to puncture or scratch the mirror surface during the process of ejecting the lens, causing defects in the product. In addition, the mirror surface of the lens needs to be smooth. After the ejection mechanism is installed and the injection molding is completed, burrs on the mirror surface are very likely to occur.

[0004] In view of this, a pneumatically stripped resin lens injection mold is urgently needed. The traditional mold cavity of a resin lens injection mold is set as an integral mold cavity with upper and lower parts. The lower mold cavity is now reformed into a combined spliced ​​type. At the same time, the traditional ejector method of the finished resin lens is replaced with a pneumatic stripping method to separate the resin lens from the mold cavity. Positive pressure is injected into the spliced ​​mold cavity, thereby evenly pressurizing and separating the resin lens and the lower mold cavity, thereby achieving the resin lens demolding. Utility Model Content

[0005] To address the shortcomings of the prior art, the present invention provides a pneumatically stripped resin lens injection mold. The conventional mold cavity of a resin lens injection mold is configured as a single, upper and lower mold cavity. The lower mold cavity is modified to a combined, spliced ​​design. The conventional ejector pin method for ejecting the finished resin lens is replaced with a pneumatically stripped method for separating the resin lens from the mold cavity. Positive pressure is injected into the spliced ​​mold cavity, evenly pressurizing and separating the resin lens from the lower mold cavity, thereby achieving demolding of the resin lens.

[0006] In order to achieve the above objectives, the technical solution of the present invention is: a pneumatic stripping resin lens injection mold, comprising: an upper mold, a lower mold, an upper mold cavity, a lower mold cavity, a mold cavity assembly and a booster pump, the upper mold and the lower mold cooperate with each other in the vertical direction, the upper mold cavity is fixedly provided at the center of the bottom surface of the upper mold, the lower mold cavity is opened at the center of the top surface of the lower mold, the upper mold cavity and the lower mold cavity are combined in the vertical direction, the mold cavity assembly and the lower mold cavity are detachably combined to form a closed mold cavity, and the booster pump is fixedly installed on the upper mold and communicated with the lower mold cavity.

[0007] Furthermore, the upper mold includes: guide pillars and booster pump communication holes, the guide pillars are fixedly installed at the four corners of the bottom surface of the upper mold, and the booster pump communication holes can be connected to the mold cavity of the lower mold.

[0008] Furthermore, the lower mold includes: a guide sleeve, a mold cavity groove and a mold cavity channel, the guide sleeve is fixedly installed at the four corners of the top surface of the lower mold, the mold cavity groove is opened at the center of the lower mold, and the mold cavity channel is horizontally opened on both sides of the mold cavity groove.

[0009] Furthermore, the upper mold cavity is opened at the center of the upper mold, the lower mold cavity is opened at the center of the mold cavity groove, and the lower mold cavity is opened with a combination hole, and the combination hole cooperates with the mold cavity assembly.

[0010] Furthermore, the mold cavity assembly includes: a combination head, a guide rod, a piston limit head and a locking seat, the combination head cooperates with the combination hole, the guide rod is fixedly mounted on one side of the combination head, the piston limit head is fixedly mounted on the guide rod and cooperates with the mold cavity channel, and the locking seat is fixedly connected to the end of the guide rod and can be detachably connected to the two side walls of the lower mold.

[0011] Furthermore, the booster pump is fixedly installed on the top surface of the upper mold, and the power end of the booster pump is connected to the mold cavity through the booster pump communication hole.

[0012] Beneficial effects:

[0013] This utility model provides a pneumatically stripped resin lens injection mold. The conventional mold cavity of a resin lens injection mold is configured as a single, upper and lower mold cavity. The lower mold cavity is now modified to a combined, spliced ​​design. The traditional ejector pin method for ejecting the finished resin lens is replaced with a pneumatically stripped method for separating the resin lens from the mold cavity. Positive pressure is injected into the spliced ​​mold cavity, evenly pressurizing and separating the resin lens from the lower mold cavity, thereby achieving demolding of the resin lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1This is a schematic diagram of the upper mold structure of a pneumatic stripping resin lens injection mold of the utility model;

[0015] Figure 2 The utility model is a schematic diagram of the lower mold structure of a resin lens injection mold with pneumatic stripping.

[0016] In the figure: 1-upper mold, 2-lower mold, 3-upper mold cavity, 4-lower mold cavity, 5-mold cavity assembly, 6-boosting pump, 11-guide column, 21-guide sleeve, 22-mold cavity groove, 23-mold cavity channel, 41-combination hole, 51-combination head, 52-guide rod, 53-piston limiter, 54-locking seat. DETAILED DESCRIPTION

[0017] 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 present invention, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present invention.

[0018] like Figure 1-2 As shown, the utility model discloses a pneumatic stripping resin lens injection mold, comprising: an upper mold 1, a lower mold 2, an upper mold cavity 3, a lower mold cavity 4, a mold cavity assembly 5 and a booster pump 6, the upper mold 1 and the lower mold 2 cooperate with each other in the vertical direction, the upper mold cavity 3 is fixedly provided at the center of the bottom surface of the upper mold 1, and the lower mold cavity 4 is opened at the center of the top surface of the lower mold 2, the upper mold cavity 3 and the lower mold cavity 4 are combined in the vertical direction, the mold cavity assembly 5 and the lower mold cavity 4 are detachably combined to form a closed mold cavity, and the booster pump 6 is fixedly installed on the upper mold 1 and communicated with the lower mold cavity 4.

[0019] In this embodiment, the upper mold 1 includes: guide pillars 11 and communication holes for the booster pump 6. The guide pillars 11 are fixedly installed at the four corners of the bottom surface of the upper mold 1. The communication holes for the booster pump 6 can be connected to the mold cavity 23 of the lower mold 2.

[0020] In this embodiment, the lower mold 2 includes: a guide sleeve 21, a cavity groove 22 and a cavity channel 23. The guide sleeve 21 is fixedly installed at the four corners of the top surface of the lower mold 2. The cavity groove 22 is opened at the center of the lower mold 2. The cavity channel 23 is horizontally opened on both sides of the cavity groove 22.

[0021] In this embodiment, the upper mold cavity 3 is opened at the center of the upper mold 1, and the lower mold cavity 4 is opened at the center of the mold cavity groove 22. The lower mold cavity 4 is opened with a combination hole 41, and the combination hole 41 cooperates with the mold cavity assembly 5.

[0022] In this embodiment, the mold cavity assembly 5 includes: a combination head 51, a guide rod 52, a piston limit head and a locking seat 54. The combination head 51 cooperates with the combination hole 41, the guide rod 52 is fixedly installed on one side of the combination head 51, the piston limit head is fixedly installed on the guide rod 52 and cooperates with the mold cavity channel 23, and the locking seat 54 is fixedly connected to the end of the guide rod 52 and can be detachably connected to the two side walls of the lower mold 2.

[0023] In this embodiment, the booster pump 6 is fixedly installed on the top surface of the upper mold 1 , and the power end of the booster pump 6 is connected to the mold cavity 23 through the communicating hole of the booster pump 6 .

[0024] Working principle:

[0025] Because the upper mold 1 and the lower mold 2 are matched in the vertical direction, the guide pillars 11 are fixedly mounted on the bottom surface of the upper mold 1, and the guide sleeves 21 are provided on the top surface of the lower mold 2. When the upper mold 1 and the lower mold 2 are connected, the guide pillars 11 and the guide sleeves 21 are connected in the vertical direction. The connection between the guide sleeves 21 and the guide pillars 11 guides the upper mold 1 and the lower mold 2, preventing the upper mold 1 and the lower mold 2 from being misaligned.

[0026] The center of the bottom surface of the upper mold 1 defines an upper mold cavity 3, and the center of the top surface of the lower mold 2 defines a lower mold cavity 4. When the upper mold 1 and the lower mold 2 are in contact and the upper mold cavity 3 and the lower mold cavity 4 are closed, liquid resin can be injected from the upper mold cavity 3 into the upper mold 1 and the lower mold 2, thereby solidifying the resin in the upper mold cavity 3 and the lower mold cavity 4.

[0027] The lower mold cavity 4 is provided with a combination hole 41. The lower mold 2 is also provided with a cavity channel 23, which communicates with the combination hole 41. The cavity channel 23 and the cavity assembly 5 cooperate, with a guide rod 52 inserted into the cavity channel 23. A combination head 51 is fixedly mounted on the end of the guide rod 52. When the guide rod 52 extends and retracts within the cavity channel 23, the combination head 51 engages with the combination hole 41, thereby forming a sealed assembly of the lower mold cavity 4.

[0028] After the liquid resin solidifies, the locking seat 54 is unlocked, pulling the guide rod 52. Simultaneously, positive-pressure air is injected into the mold channel 23 via the booster pump 6 mounted on the top surface of the upper mold 1. The increased air pressure within the mold channel 23 pushes the guide rod 52 and the piston stopper toward the outside of the upper mold 1 and lower mold 2. At this point, the assembly head 51 separates from the assembly hole 41, and positive-pressure air is injected into the lower mold cavity 4, separating the resin lens from the lower mold cavity 4.

[0029] The utility model provides a pneumatically stripped resin lens injection mold. Conventional resin lens injection molds have a mold cavity that is configured as a single, upper and lower mold cavity. The lower mold cavity (4) is now modified to a combined, spliced ​​design. The traditional ejector pin method for ejecting the finished resin lens is replaced with a pneumatically stripped method for separating the resin lens from the mold cavity. Positive pressure is injected into the spliced ​​mold cavity, evenly pressurizing and separating the resin lens from the lower mold cavity (4), thereby achieving demolding of the resin lens.

[0030] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. All modifications, equivalent replacements, improvements, etc. within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A pneumatic stripping resin lens injection mold, comprising: An upper mold (1), a lower mold (2), an upper mold cavity (3), a lower mold cavity (4), a mold cavity assembly (5) and a booster pump (6), characterized in that the upper mold (1) and the lower mold (2) cooperate with each other in the vertical direction, an upper mold cavity (3) is fixedly provided at the center of the bottom surface of the upper mold (1), a lower mold cavity (4) is opened at the center of the top surface of the lower mold (2), the upper mold cavity (3) and the lower mold cavity (4) are combined in the vertical direction, the mold cavity assembly (5) and the lower mold cavity (4) are detachably combined to form a closed mold cavity, and the booster pump (6) is fixedly installed on the upper mold (1) and is connected to the lower mold cavity (4).

2. A pneumatic stripping resin lens injection mold according to claim 1, characterized in that: The upper mold (1) comprises: a guide column (11) and a booster pump (6) communication hole, wherein the guide column (11) is fixedly mounted at the four corners of the bottom surface of the upper mold (1), and the booster pump (6) communication hole can be connected to the mold cavity (23) of the lower mold (2).

3. A pneumatic stripping resin lens injection mold according to claim 2, characterized in that: The lower mold (2) comprises: a guide sleeve (21), a mold cavity groove (22) and a mold cavity channel (23); the guide sleeve (21) is fixedly installed at the four corners of the top surface of the lower mold (2); the mold cavity groove (22) is opened at the center of the lower mold (2); and the mold cavity channel (23) is horizontally opened on both sides of the mold cavity groove (22).

4. A pneumatic stripping resin lens injection mold according to claim 3, characterized in that: The upper mold cavity (3) is opened at the center of the upper mold (1), and the lower mold cavity (4) is opened at the center of the mold cavity groove (22). The lower mold cavity (4) is provided with a combination hole (41), and the combination hole (41) cooperates with the mold cavity assembly (5).

5. The pneumatic stripping resin lens injection mold according to claim 4, characterized in that: The mold cavity assembly (5) comprises: a combination head (51), a guide rod (52), a piston limit head and a locking seat (54); the combination head (51) cooperates with the combination hole (41); the guide rod (52) is fixedly mounted on one side of the combination head (51); the piston limit head is fixedly mounted on the guide rod (52) and cooperates with the mold cavity channel (23); the locking seat (54) is fixedly connected to the end of the guide rod (52) and can be detachably connected to the two side walls of the lower mold (2).

6. The pneumatic stripping resin lens injection mold according to claim 5, characterized in that: The booster pump (6) is fixedly mounted on the top surface of the upper mold (1), and the power end of the booster pump (6) is connected to the mold cavity (23) through the booster pump (6) communication hole.

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