Submersible glue type injection mold for optical lens

Abstract

The utility model discloses an optical lens latent glue type injection mold, which comprises a rear mold core, a cavity group is arranged on the rear mold core, the cavity group comprises a cavity, a hot nozzle glue inlet and a glue inlet runner, the glue inlet runner comprises a main runner and a branch runner, a square rear mold insert is embedded at the joint of each branch runner and the cavity, the cavity comprises a large cavity part and a small cavity part, and the large cavity part and the small cavity part are arranged in the cavity. The small cavity part is arranged on the rear mold insert, the inner side wall of the small cavity part is provided with a conical glue hiding opening which is gradually shrunk towards the mold cavity, the large end of the conical glue hiding opening is smoothly connected with a connecting runner through an arc, and the connecting runner is smoothly connected with the sub-runner. According to the utility model, an existing square large gate is changed into the conical hidden gate, and after injection molding is finished, when a product is ejected out through the ejector pin device, the product is automatically disconnected from a water gap material and directly falls into a material box below, so that the technological processes of manipulator suction and laser cutting are saved, the production cycle is shortened, and the production efficiency is greatly improved; and meanwhile, the number of cavities in the mold can be increased, so that the productivity is improved by more than 40%.

Description

Technical Field

[0001] The utility model relates to the technical field of optical lens production, in particular to a latent glue injection mold for an optical lens. Background Art

[0002] Optical lens is one of the basic optical devices in optics and optoelectronics. Optical lens has been widely used in LED lighting, chip manufacturing, super-resolution science and many high-tech products.

[0003] At present, the injection molding process of optical lenses is as follows: 1. Injection molding; 2. Use a robot to suck the molded plastic parts onto a laser cutting machine; 3. Laser cutting; 4. Use a robot to suck the product into a product box and suck the sprue material into a sprue material box. Because the glue inlet between the runner and the cavity on the rear mold core of the existing optical lens injection mold is a large square glue inlet, the lens and the sprue material are connected together after the product is injection molded, and the material cannot be unloaded directly. It must be sucked by the robot - laser cutting - sucked and unloaded by the robot, which is inefficient and has a long cycle. In addition, it also increases the energy consumption and maintenance costs of the robot and laser cutting machine. Utility Model Content

[0004] In order to solve the problem that the above-mentioned existing optical lens injection molding production process cannot be unloaded directly after the injection molding is completed, and the plastic parts must be sucked by a robot for laser cutting and the robot sucks and unloads after cutting is completed, resulting in low production efficiency, long cycle and increased energy consumption, the utility model provides an optical lens latent glue injection mold, which changes the existing square large glue port into a conical latent glue port, and when the product is ejected by the ejector device after the injection molding is completed, the product and the sprue material will be automatically disconnected and fall directly into the material box below, thereby saving the process flow of robot suction and laser cutting, shortening the production cycle, greatly improving production efficiency, and at the same time saving the energy consumption and maintenance costs of the robot and laser cutting machine.

[0005] To achieve the above-mentioned purpose, the utility model provides an optical lens latent glue injection mold, including a rear template, the rear template is provided with a plurality of rear mold cores evenly distributed in an array, the rear mold core is provided with a cavity group, the cavity group includes a cavity, a hot nozzle glue inlet and a glue inlet flow channel, the hot nozzle glue inlet is arranged at the center of the rear mold core, the cavity is provided with 2N cavities, which are evenly distributed around the hot nozzle glue inlet in an annular array, N is a natural number greater than 1, the glue inlet flow channel includes a main flow channel and a branch flow channel, the main flow channel is connected to the hot nozzle glue inlet, the main flow channel is provided with N, which are evenly distributed in a circular array, and each of the main flow channels is connected to two branch flow channels symmetrically distributed relative to the main flow channel at the end, the branch flow channel is connected to the corresponding cavity, and the two cavities corresponding to the end of each main flow channel are symmetrically distributed, characterized in that: each branch flow channel is connected to the cavity A square rear mold insert is inlaid at the cavity, the cavity includes a large cavity portion and a small cavity portion, the large cavity portion is arranged on the rear mold core, and the small cavity portion is arranged on the rear mold insert, and the inner side wall of the small cavity portion is provided with a tapered latent glue port which gradually shrinks toward the cavity direction, and the large end of the tapered latent glue port is smoothly connected with a connecting flow channel through an arc, and the connecting flow channel is smoothly connected to the branch flow channel, a first ejector hole is provided in the middle of the cavity, and three second ejector holes uniformly distributed in a circle are provided around it, a second ejector hole is provided in the middle of the small cavity portion, and a third ejector hole is provided at the connection between the two branch flow channels and the main flow channel, and a first ejector pin, a second ejector pin and a third ejector pin are respectively provided in the first ejector pin hole, the second ejector pin and the third ejector pin, and the first ejector pin, the second ejector pin and the third ejector pin are all connected to an ejection device arranged at the rear of the rear mold core, for ejecting and unloading the optical lens after injection molding is completed.

[0006] As a further improvement of the present technology, the angle α between the central axis of the tapered latex port and the vertical line is set to 42±10°, and the taper of the tapered latex port is set to 20±10°.

[0007] As a further improvement of the present technology, the maximum diameter of the small end of the tapered latex port is ≤0.9 mm.

[0008] As a further improvement of the present technology, the lower end of the rear mold insert is provided with a step portion extending outward and downward, and the lower end of the rear mold core and the corresponding position of the step portion are provided with a square countersunk hole for matching and hanging. The step portion is connected to the bottom surface of the square countersunk hole for easy later maintenance and replacement.

[0009] As a further improvement of the present technology, the rear mold insert is made of SKD61 hardened mold steel, which is quenched to a hardness of HRC48-52, and the conical latent glue port is polished to a finish of above level 7.

[0010] As a further improvement of the present technology, the number of cavities of the latent-rubber injection mold is increased by 10 to 30% compared with the number of cavities of the existing mold under the same injection molding equipment conditions.

[0011] Compared with the prior art, the beneficial effects of the utility model are as follows: 1. The utility model changes the existing square large glue port into a conical latent glue port. After the injection molding is completed, when the product is ejected by the ejector device, the product and the sprue material will be automatically disconnected and directly fall into the material box below, thereby saving the process flow of robot suction and laser cutting, shortening the production cycle, greatly improving the production efficiency, and saving the energy consumption and maintenance costs of the robot and laser cutting machine; 2. After the mold of the utility model is changed to a latent glue type, the number of cavities of the mold is no longer limited by the robot and the laser cutting machine, the mold can be enlarged, and the number of cavities on the mold can be increased, so that the production capacity of an existing injection molding equipment can be increased by more than 40%; 3. The utility model sets the conical latent glue port on the rear mold insert, and the rear mold insert is connected to the rear mold core by a step portion, so that the rear mold insert can be replaced individually after wear in the later stage, which can greatly improve the maintenance efficiency and maintenance cost of the rear mold core. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the existing rear mold core structure;

[0013] Figure 2 This is a schematic diagram of the rear mold core structure of an embodiment of the utility model patent;

[0014] Figure 3 This is a schematic diagram of the main structure of the rear mold core of the embodiment of the utility model patent;

[0015] Figure 4 for Figure 3 Middle AA section view;

[0016] Figure 5 This is a schematic diagram of the rear mold insert structure of the utility model patent embodiment;

[0017] Figure 6 This is a schematic diagram of the top view of the rear mold insert of the embodiment of the utility model patent;

[0018] Figure 7 for Figure 6 Middle BB section view.

[0019] In the figure: 1, rear mold core, 101, square countersunk hole, 2, cavity, 2-1, large cavity part, 2-2, small cavity part, 3, hot nozzle glue inlet, 4, main flow channel, 5, branch flow channel, 6, rear mold insert, 601, tapered latent glue port, 602, step part, 603, connecting flow channel, 6', large glue port, 7, first ejector pin hole, 8, second ejector pin hole, 9, third ejector pin hole. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention.

[0022] like Figures 2 to 7 As shown, the first embodiment of the utility model includes a rear template, on which 32 rear mold cores 1 are evenly distributed in an array, and a cavity group is provided on the rear mold core 1, the cavity group includes a cavity 2, a hot nozzle glue inlet 3 and a glue inlet flow channel, the hot nozzle glue inlet 3 is arranged at the center of the rear mold core 1, and 20 cavities 2 are provided, which are evenly distributed around the hot nozzle glue inlet 3 in a circular array, and the glue inlet flow channel includes a main channel 4 and a branch channel 5, the main channel 4 is connected to the hot nozzle glue inlet 3, and 10 main channels 4 are evenly distributed in a circular array, and the end position of each main channel 4 is connected with two branch channels 5 symmetrically distributed relative to the main channel 4, the branch channel 5 is connected to the corresponding cavity 2, and the two cavities 2 corresponding to the end of each main channel 4 are symmetrically distributed relative to the main channel, and each branch channel 5 is inlaid with a square rear mold insert 6 at the connection with the cavity 2, and the cavity 2 includes a large cavity part 2-1 and a small cavity part 2-2, the large cavity 201 is arranged on the rear mold core 1, and the small cavity 2-2 is arranged on the rear mold insert 6. The inner wall of the small cavity 2-2 is provided with a tapered latent glue port 601 which gradually decreases toward the direction of the cavity 2. The large end of the tapered latent glue port 601 is smoothly connected with a connecting flow channel 603 through an arc. The connecting flow channel 603 is smoothly connected with the branch flow channel 5. A first ejector hole 7 is provided in the middle of the cavity 2, and three second ejector holes 8 are evenly distributed in a circle are provided around it. A second ejector hole 8 is provided in the middle of the small cavity 2-2. A third ejector hole 9 is provided at the connection between the two branch flow channels 5 and the main flow channel 4. The first ejector hole 7, the second ejector hole 8 and the third ejector hole 9 are respectively provided with a first ejector, a second ejector and a third ejector. The first ejector, the second ejector and the third ejector are all connected to an ejection device arranged at the rear of the rear mold core 1, and are used to eject and unload the optical lens after injection molding.

[0023] The utility model embodiment changes the existing square large glue port 6 '(see Figure 1) is changed to a conical latent glue port 601. After the injection molding is completed, the product and the sprue material will be automatically disconnected when the product is ejected by the ejector device and fall directly into the material box below, thus saving the process of robot suction and laser cutting, shortening the production cycle, greatly improving the production efficiency, and saving the energy consumption and maintenance costs of the robot and laser cutting machine.

[0024] like Figure 7 As shown, the included angle α between the central axis of the tapered latex port 601 and the vertical line is set to 42°, and the taper β of the tapered latex port 601 is set to 20°.

[0025] The maximum diameter of the small end of the tapered latex port 601 is 0.86 mm.

[0026] like Figure 4 , 7 As shown, the lower end of the rear mold insert 6 is provided with a step portion 602 extending outward and downward, and the lower end of the rear mold core 1 is provided with a square countersunk hole 101 corresponding to the step portion 602, and the step portion 602 is connected to the bottom surface of the square countersunk hole 101 for easy maintenance and replacement. The rear mold insert can be replaced individually after being worn in the later stage, which can greatly improve the maintenance efficiency and maintenance cost of the rear mold core 1.

[0027] The rear die insert 6 is made of SKD61 hardened die steel, which is quenched with a quenching hardness of HRC48-52. The conical latent glue port is polished with 601 and the finish reaches above grade 7.

[0028] In the first embodiment of the present invention, 32×20=640 cavities are arranged on the rear template.

[0029] In the first embodiment of the utility model, one mold can injection mold 640 optical lenses. Because the robot suction and laser cutting process are saved, the production cycle is reduced from the original 50S to 40S, and the yield rate is calculated at 90%, and the production capacity of optical lenses produced in one day is 1.24 million. The existing large-cavity injection mold under the same injection molding equipment conditions as the first embodiment of the utility model can be provided with a maximum of 512 cavities, and one mold can injection mold 512 optical lenses, with a production cycle of 50S, a yield rate of 90%, and a production capacity of optical lenses produced in one day is 800,000. It can be seen that the production capacity of the first embodiment of the utility model is 55% higher than that of the prior art.

[0030] The second embodiment of the utility model is basically the same as the first embodiment, except that the rear mold plate is provided with 27 rear mold cores 1 evenly distributed in an array, the rear mold core 1 is provided with 16 mold cavities 2, the main flow channels are provided with 8, and the rear mold inserts 6 are provided with 16 pieces.

[0031] The rear template of the second embodiment of the utility model is provided with 27×16=432 cavities in total, and one mold can be used for injection molding of 432 optical lenses. Because the robot suction and laser cutting processes are saved, the production cycle is reduced from the original 50S to 40S, and the yield rate is calculated at 90%, and the production capacity of optical lenses produced in one day is 840,000. The existing injection mold under the same injection molding equipment conditions as the first embodiment of the utility model can be provided with a maximum of 384 cavities, and one mold can be used for injection molding of 384 optical lenses, with a production cycle of 50S, a yield rate of 90%, and a production capacity of optical lenses produced in one day is 600,000. It can be seen that the production capacity of the second embodiment of the utility model is 40% higher than that of the prior art.

[0032] The above are only preferred implementations of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A latent glue injection mold for an optical lens, comprising a rear mold plate, the rear mold plate is provided with a plurality of rear mold cores uniformly distributed in an array, the rear mold core is provided with a cavity group, the cavity group includes a cavity, a hot nozzle glue inlet and a glue inlet flow channel, the hot nozzle glue inlet is arranged at the center of the rear mold core, the mold cavity is provided with 2N cavities, which are uniformly distributed around the hot nozzle glue inlet in an annular array, N is a natural number greater than 1, the glue inlet flow channel includes a main flow channel and a branch flow channel, the main flow channel is connected to the hot nozzle glue inlet, the main flow channel is provided with N, which are uniformly distributed in a circular array, and each of the main flow channels is connected to two branch flow channels symmetrically distributed relative to the main flow channel at the end, the branch flow channel is connected to the corresponding cavity, and the two cavities corresponding to the end of each main flow channel are symmetrically distributed, characterized in that: A square rear mold insert is inlaid at the connection between each branch runner and the cavity, and the cavity includes a large cavity portion and a small cavity portion. The large cavity portion is arranged on the rear mold core, and the small cavity portion is arranged on the rear mold insert. The inner side wall of the small cavity portion is provided with a tapered latent glue port which gradually shrinks toward the cavity direction, and the large end of the tapered latent glue port is smoothly connected with a connecting runner through an arc, and the connecting runner is smoothly connected to the branch runner. A first ejector hole is provided in the middle of the cavity, and three second ejector holes uniformly distributed in a circle are provided around it, and a second ejector hole is provided in the middle of the small cavity portion. A third ejector hole is provided at the connection between the two branch runners and the main runner, and a first ejector pin, a second ejector pin and a third ejector pin are respectively provided in the first ejector pin hole, the second ejector pin and the third ejector pin, and the first ejector pin, the second ejector pin and the third ejector pin are all connected to an ejection device arranged at the rear of the rear mold core, for ejecting and unloading the optical lens after injection molding.

2. The latent injection mold for an optical lens according to claim 1, characterized in that: The angle α between the central axis of the tapered latex port and the vertical line is set to 42±10°, and the taper of the tapered latex port is set to 20±10°.

3. The latent injection mold for an optical lens according to claim 1, characterized in that: The maximum diameter of the small end of the tapered latex port is ≤0.9 mm.

4. The latent injection mold for an optical lens according to claim 1, characterized in that: The lower end of the rear mold insert is provided with a step portion extending outward and downward, and the lower end of the rear mold core and the corresponding position of the step portion are provided with a square countersunk hole for matching and hanging. The step portion is connected to the bottom surface of the square countersunk hole for easy later maintenance and replacement.

5. The latent injection mold for an optical lens according to claim 1, characterized in that: The rear mold insert is made of SKD61 hardened mold steel and is quenched to a hardness of HRC48-52. The conical latent glue port is polished to a finish of more than level 7.

6. The latent injection mold for an optical lens according to claim 1, characterized in that: The number of cavities of the latent plastic injection mold is increased by 10 to 30% compared with the number of cavities of the existing mold under the same injection molding equipment conditions.

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