In-mold shearing injection mold for lens pouring gate

Abstract

The utility model relates to the technical field of injection molds, in particular to an in-mold shearing injection mold for a lens sprue. A shearing groove connected with the glue injection runner is formed in the side face of the glue injection runner, a rubber sealing cushion block is arranged between the side face of the glue injection runner and the shearing groove, the front end of the rubber sealing cushion block is rotationally connected with a shielding structure, and a connecting device and a cutting knife are arranged in the shearing groove. When the cutting device is used, the shielding structure is arranged, so that the effect of shielding the rubber sealing cushion block is achieved, injection molding raw materials are prevented from entering the shearing groove through the shearing groove in the pouring process, and the service life of the cutting knife and the service life of the connecting device are further prolonged; and then, a second driving device is used for driving a cutting knife to penetrate through the shearing groove so as to shear the injection molding raw material, so that the injection molding raw material is sheared before being completely cooled and hardened, and the surface of the sheared pouring gate is smooth.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, and particularly relates to an in-mold shearing injection mold for a lens gate. Background Art

[0002] Molds represent the development level of the industrial era. Now the application scope of plastic mold products has become an essential part of our lives. All kinds of plastic products in our daily life are produced by molds, and all plastic products have a gate. Therefore, the gate needs to be cut off after the product is produced.

[0003] The current in-mold shearing injection mold, for example: the Chinese patent with the publication number CN206085503U discloses an in-mold shearing injection mold for a lens gate. There is an in-mold shearing device for shearing the lens gate between the fixed mold and the moving mold. When the mold is injecting, the upper mold cylinder pushes the upper mold slider into the first upper mold floating plate. At this time, the upper mold cylinder pressing plate and the second upper mold floating plate are pressed to ensure that there is no flash overflow during injection. After injection, the upper mold cylinder retracts and pulls out the upper mold slider from the inside. After it is completely pulled out, the lower mold cylinder acts. The lower mold cylinder will drive the ejector plate, ejector pad, second lower mold floating plate and lower mold floating pad to move. At the same time, the lower mold ejector post will push the upper mold ejector post, and the upper mold ejector post will push the second upper mold floating plate to move a certain distance. The functions of the upper mold cylinder and the lower mold cylinder mainly ensure that the fixed mold shearing needle, the moving mold shearing needle and the lower mold shearing needle cut the gate of the plastic product from the inside of the mold by the movement of the cylinder when the mold has not been opened, and the moving directions of the fixed mold shearing needle and the moving mold shearing needle are the same during shearing. After mold opening, a manipulator can be designed with a suction cup to suck the product out of the mold and place it on the conveyor belt for subsequent station operations. The in-mold shearing time of the utility model should be after injection holding pressure. However, the structure of this in-mold shearing device is relatively complex, the production and processing difficulty is large, which is not conducive to the actual production and processing of molds, and the use cost is high.

[0004] Therefore, an in-mold shearing injection mold for a lens gate is proposed. Content of the Utility Model

[0005] The purpose of the utility model is to propose an in-mold shearing injection mold for a lens gate aiming at the problems existing in the background art.

[0006] In order to achieve the above purpose, the technical solution of the utility model is as follows:

[0007] An in-mold shearing injection mold for a lens gate, comprising an upper mold and a lower mold. The upper mold includes a top plate, a moving template, and a moving mold insert arranged in sequence from top to bottom. The lower mold includes a bottom plate, a fixed block, a stationary template, and a stationary mold insert arranged in sequence from bottom to top. A cavity for molding the lens is formed between the moving mold insert and the stationary mold insert. At the center position of the top of the top plate, there is a nozzle. The lower end of the nozzle is connected to a glue injection runner that penetrates through the top plate, the moving template, and the moving mold insert. The lower end of the glue injection runner corresponds to the cavity. A connected shearing groove is formed on the side of the glue injection runner. The shearing groove is arranged in the moving mold insert. A rubber sealing cushion block is arranged between the side of the glue injection runner and the shearing groove. The outer periphery of the rubber sealing cushion block is fixedly sealed with the shearing groove. The front end of the rubber sealing cushion block is rotatably connected to a shielding structure for shielding the rubber sealing cushion block. A connecting device and a cutting knife are arranged in the shearing groove. A guide knife groove for passing through the cutting knife is formed on the rubber sealing cushion block. A first driving device and a second driving device are arranged on the side of the moving template. One end of the connecting device passes through the rubber sealing cushion block and is slidably connected to the shielding structure, and the other end is connected to the output shaft of the first driving device that penetrates through the moving mold insert and the moving template. One side of the cutting knife is connected to the output shaft of the second driving device that penetrates through the moving mold insert and the moving template.

[0008] Specifically, the shielding structure includes a shielding plate. The shielding plate is rotatably connected to the side of the rubber sealing cushion block facing the glue injection runner. A sliding groove is formed on the side of the shielding plate facing the rubber sealing cushion block.

[0009] Specifically, the connecting device includes a sliding block, a connecting rod, and a moving seat. One end of the connecting rod is rotatably connected to the sliding block, and the other end is connected to the moving seat. The sliding block is slidably matched with the sliding groove.

[0010] Specifically, the first driving device includes a first motor and a first telescopic rod. One end of the first telescopic rod is connected to the output shaft of the first motor, and the other end penetrates through the moving mold insert and the moving template and is connected to the moving seat.

[0011] Specifically, the second driving device includes a second motor and a second telescopic rod. One end of the second telescopic rod is connected to the output shaft of the second motor, and the other end penetrates through the moving mold insert and the moving template and is connected to the cutting knife.

[0012] The beneficial effects of the present utility model are as follows:

[0013] The in-mold shearing injection mold for the lens gate involved in the present utility model, when in use, the injection molding raw material flows into the cavity through the nozzle and the injection runner. By setting the shielding structure, it plays a role in shielding the rubber sealing cushion block, avoiding the injection molding raw material from entering the shearing groove during the pouring process, thereby prolonging the service life of the cutting knife and the connecting device. At the same time, the first driving device drives the shielding structure to rotate through the connecting device so as to expose the shearing groove. Subsequently, the second driving device drives the cutting knife to penetrate the shearing groove to shear the injection molding raw material, so as to perform shearing before the injection molding raw material is completely cooled and hardened, achieving a flat gate surface after shearing, improving the product quality, having a simple structure, reducing the production and processing difficulty, and having a lower use cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic structural view of an in-mold shearing injection mold for a lens gate according to an embodiment of the present utility model;

[0015] Figure 2 It is an enlarged view of part A in an embodiment of the present utility model;

[0016] Figure 3 It is a side view of the shielding plate in an embodiment of the present utility model;

[0017] Figure 4 It is a schematic structural view of the connecting device according to an embodiment of the present utility model.

[0018] In the figure: top plate 1, moving template 2, moving die insert 3, bottom plate 4, fixed block 5, fixed template 6, fixed die insert 7, nozzle 8, injection runner 9, cavity 10, first driving device 11, second driving device 12, rubber sealing cushion block 13, shielding plate 14, sliding block 15, connecting rod 16, moving seat 17, first telescopic rod 18, sliding groove 19, knife guiding groove 20, cutting knife 21, second telescopic rod 22. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0020] Refer to the attached Figures 1-4, an in-mold shearing injection mold for a lens gate, comprising an upper mold and a lower mold. The upper mold includes a top plate 1, a moving template 2, and a moving mold insert 3 arranged in sequence from top to bottom. The lower mold includes a bottom plate 4, a fixed block 5, a fixed template 6, and a fixed mold insert 7 arranged in sequence from bottom to top. A cavity 10 for molding a lens is formed between the moving mold insert 3 and the fixed mold insert 7; a nozzle 8 is provided at the center position of the top of the top plate 1. The lower end of the nozzle 8 is connected to a glue injection runner 9 that penetrates through the top plate 1, the moving template 2, and the moving mold insert 3. The lower end of the glue injection runner 9 corresponds to the cavity 10. A connected shearing groove is opened on the side of the glue injection runner 9. The shearing groove is arranged in the moving mold insert 3. A rubber sealing cushion block 13 is provided between the side of the glue injection runner 9 and the shearing groove. The outer periphery of the rubber sealing cushion block 13 is fixedly sealed with the shearing groove. The front end of the rubber sealing cushion block 13 is rotatably connected to a shielding structure for shielding the rubber sealing cushion block 13. A connecting device and a cutting knife 21 are provided in the shearing groove. A guide knife groove 20 for passing through the cutting knife 21 is opened on the rubber sealing cushion block 13. A first driving device 11 and a second driving device 12 are provided on the side of the moving template 2. One end of the connecting device penetrates through the rubber sealing cushion block 13 and is slidably connected to the shielding structure, and the other end is connected to the output shaft of the first driving device 11 that penetrates through the moving mold insert 3 and the moving template 2. One side of the cutting knife 21 is connected to the output shaft of the second driving device 12 that penetrates through the moving mold insert 3 and the moving template 2.

[0021] In this embodiment, the shielding structure includes a shielding plate 14. The shielding plate 14 is rotatably connected to the side of the rubber sealing cushion block 13 facing the glue injection runner 9. A sliding groove 19 is opened on the side of the shielding plate 14 facing the rubber sealing cushion block 13; the connecting device includes a sliding block 15, a connecting rod 16, and a moving seat 17. One end of the connecting rod 16 is rotatably connected to the sliding block 15, and the other end is connected to the moving seat 17. The sliding block 15 is slidably matched with the sliding groove 19.

[0022] In this embodiment, when not in use, the baffle 14 is in a vertical state and is used to block the rubber sealing cushion block 13. Among them, the rubber sealing cushion block 13 can play a role in blocking the connection between the glue injection runner 9 and the shearing groove. In cooperation with the use of the baffle 14, it can play a dual-sealing role, covering the guide knife groove 20 on the rubber sealing cushion block 13, and avoiding the casting raw material flowing through the guide knife groove 20 into the shearing groove when flowing through the glue injection runner 9, thereby extending the service life of the cutting knife 21 and the connecting device; when it is necessary to shear the injection molding raw material, at this time, shear before the injection molding raw material is completely cooled and hardened. The first driving device 11 drives the moving seat 17, the connecting rod 16 and the sliding block 15 to move towards the glue injection runner 9. During the moving process of the connecting rod 16, the sliding block 15 moves up and down in the sliding groove 19, so as to drive the baffle 14 to rotate upwards, thereby exposing the shearing groove. The second driving device 12 drives the cutting knife 21 to pass through the shearing groove to shear the injection molding raw material, thereby realizing the shearing of the injection molding raw material, so as to shear before the injection molding raw material is completely cooled and hardened, achieving a flat gate surface after shearing, improving the product quality, with a simple structure, reducing the production and processing difficulty, and having a lower use cost.

[0023] In this embodiment, after the shearing is completed, the second driving device 12 can be used to drive the cutting knife 21 to pass through the shearing groove and return to the initial position to accommodate the cutting knife 21. At the same time, the first driving device 11 is used to drive the moving seat 17, the connecting rod 16 and the sliding block 15 back to the initial position to reset the baffle 14, which is convenient to use.

[0024] In this embodiment, the first driving device 11 includes a first motor and a first telescopic rod 18. One end of the first telescopic rod 18 is connected to the output shaft of the first motor, and the other end passes through the moving die insert 3, the moving template 2 and is connected to the moving seat 17.

[0025] In this embodiment, the second driving device 12 includes a second motor and a second telescopic rod 22. One end of the second telescopic rod 22 is connected to the output shaft of the second motor, and the other end passes through the moving die insert 3, the moving template 2 and is connected to the cutting knife 21.

[0026] In this embodiment, the first motor and the second motor involved in the present invention are both installed outside the moving template 2, avoiding installing the motor inside the traditional mold, which is not easy to maintain the motor, reducing the production and processing difficulty, and having a lower use cost.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the purpose and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. An in-mold shearing injection mold for a lens gate, comprising an upper mold and a lower mold. The upper mold includes a top plate, a moving template, and a moving mold insert sequentially arranged from top to bottom. The lower mold includes a bottom plate, a fixed block, a fixed template, and a fixed mold insert sequentially arranged from bottom to top. A cavity for molding the lens is formed between the moving mold insert and the fixed mold insert; it is characterized in that, A nozzle is provided at the top center position of the top plate. The lower end of the nozzle is connected to a glue injection runner that penetrates through the top plate, the moving template, and the moving die insert. The lower end of the glue injection runner corresponds to the cavity. A connected shear groove is formed on the side surface of the glue injection runner, and the shear groove is arranged within the moving die insert. A rubber sealing cushion block is provided between the side surface of the glue injection runner and the shear groove. The outer periphery of the rubber sealing cushion block is fixedly sealed with the shear groove. The front end of the rubber sealing cushion block is rotatably connected to a shielding structure for shielding the rubber sealing cushion block. A connecting device and a cutting knife are arranged within the shear groove. A knife guiding groove for passing the cutting knife is formed on the rubber sealing cushion block. A first driving device and a second driving device are arranged on the side surface of the moving template. One end of the connecting device passes through the rubber sealing cushion block and is slidably connected to the shielding structure, and the other end is connected to the output shaft of the first driving device that passes through the moving die insert and the moving template. One side of the cutting knife is connected to the output shaft of the second driving device that passes through the moving die insert and the moving template.

2. The in-mold shearing injection mold for a lens gate according to claim 1, characterized in that, The shielding structure includes a shielding plate, and the shielding plate is rotatably connected to the side of the rubber sealing cushion block facing the glue injection runner. A sliding groove is formed on the side of the shielding plate facing the rubber sealing cushion block.

3. The in-mold shearing injection mold for a lens gate according to claim 2, characterized in that, The connecting device includes a sliding block, a connecting rod, and a moving seat. One end of the connecting rod is rotatably connected to the sliding block, and the other end is connected to the moving seat. The sliding block is slidably matched with the sliding groove.

4. The in-mold shearing injection mold for a lens gate according to claim 3, characterized in that, The first driving device includes a first motor and a first telescopic rod. One end of the first telescopic rod is connected to the output shaft of the first motor, and the other end passes through the moving die insert and the moving template and is connected to the moving seat.

5. The in-mold shearing injection mold for a lens gate according to claim 1, characterized in that, The second driving device includes a second motor and a second telescopic rod. One end of the second telescopic rod is connected to the output shaft of the second motor, and the other end passes through the moving die insert and the moving template and is connected to the cutting knife.

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