Optical lens water gap cutting device

Abstract

The utility model relates to an optical lens water gap cutting device which comprises a rack, an upper die base, an upper die plate, a lower die plate and a driving piece, and the lower die plate is detachably connected to the lower end of the rack; the driving piece is arranged at the upper end of the rack and drives the upper die base to move up and down; the upper die plate is located below the upper die base and arranged opposite to the lower die plate, and the upper die plate is connected with the upper die base in an up-down sliding mode. The lower mold plate is provided with a water gap avoiding groove and at least two lens positioning grooves, and the upper mold plate is provided with hollow areas which are in one-to-one correspondence with the lens positioning grooves and are used for avoiding arch surfaces of lenses; the upper die plate is further provided with a cutting assembly used for cutting the water gap. Due to the arrangement of the hollow area, the arch surface of the lens can be prevented from being pressed during mold closing, so that the lens mold can be matched with lenses with the same length, the same width and different curvatures, and the universality is higher.

Description

Technical Field

[0001] This utility model relates to the field of lens processing equipment technology, and in particular to an optical lens sprue cutting device. Background Technology

[0002] Sunglasses lenses are typically injection molded. Generally, one mold can mold 1-6 lenses simultaneously. Lenses from the same batch are connected by sprue marks (formed by solidified material remaining in the injection channel). After molding, sunglass lenses require processes such as coating. Before these processes, the sprue marks must be cut off to separate the lenses. The separated lenses are then secured using a transfer rack. Previously, this was done manually using diagonal pliers or a knife to cut the lenses from the sprue marks. However, this method resulted in uneven cuts, sometimes even damaging the lenses, and was inefficient.

[0003] Currently, specialized sprue cutting devices exist. These devices position a sheet of sunglass lens in the lower mold of the cutting device, then start the machine. The upper mold presses down, and the two molds work together to cut the junction between the sunglass lens and the sprue. This method is efficient and ensures cutting quality. However, existing sprue cutting devices, to guarantee the cutting effect, typically require their upper and lower molds to be perfectly matched to the shape of the sunglass lens. This results in different specifications of sunglass lenses requiring separate upper and lower molds, leading to poor versatility. Furthermore, due to varying customer demands and product updates, manufacturers produce a large number of lens specifications, resulting in excessively high mold-making costs. Therefore, improving the versatility of sprue cutting devices is indeed necessary. Utility Model Content

[0004] The purpose of this invention is to provide an optical lens gate cutting device that can cut the connecting gates of lenses with the same length and width but different curvatures (i.e., different heights of the arch surface) without changing the mold, thus making it more versatile.

[0005] To achieve the above objectives, this utility model discloses an optical lens sprue cutting device, which includes a frame, an upper mold base, an upper template, a lower template, and a driving component. The lower template is detachably connected to the lower end of the frame. The driving component is located at the upper end of the frame and drives the upper mold base to move up and down. The upper template is located below the upper mold base and is opposite to the lower template, and the upper template is slidably connected to the upper mold base. The lower template is provided with a sprue avoidance groove and at least two lens positioning grooves. The upper template is provided with a hollow area corresponding to the lens positioning grooves and used to avoid the arched surface of the lens. The upper template is also provided with a cutting component for cutting the sprue.

[0006] With the above settings, the lens positioning groove ensures accurate lens positioning, and the sprue clearance groove prevents the sprue from affecting lens positioning. When the upper and lower mold plates are closed, the cutting component can cut off the connection point between the lens and the sprue, resulting in good cutting performance. The hollowed-out area ensures that the lens's arched surface is not compressed during mold closing, allowing this invention to be used with lenses of the same length and width but different curvatures (generally, lenses of the same length and width but different curvatures have the same arc shape on both sides), thus enhancing its versatility.

[0007] Preferably, the assembly further includes a plurality of first equal-height screws and a first spring corresponding to each of the first equal-height screws. The upper template is provided with a first through hole corresponding to each of the first equal-height screws. The first equal-height screws pass through the first through holes and the first springs in sequence and are then threaded to the upper mold base. The upper template is slidably connected to the upper mold base through the first equal-height screws. With this configuration, when the upper mold is pressed down, the upper template contacts the lower template first. If there is a slight misalignment in the placement of the lens, it can also play a certain corrective role, preventing damage to the lens. Then, under the downward pressure of the upper mold base, the cutting component is forced to cut off the sprue, ensuring product quality and cutting effect. In addition, the upper template is also easy to install and remove.

[0008] Preferably, the cutting assembly includes at least two cutters, at least one mounting platform, at least two second equal-height screws, and at least two second springs. Each mounting platform corresponds to at least one cutter, at least two second equal-height screws, and at least two second springs, with each second equal-height screw corresponding to a second spring. The mounting platform is located between the upper mold base and the upper template. The mounting platform has second through holes corresponding to each of the second equal-height screws. The second equal-height screws pass through the second through holes and the second springs in sequence and are threaded to the upper template. The mounting platform is slidably connected to the upper template via the second equal-height screws. The cutter is detachably connected to the mounting platform and can extend beyond the bottom surface of the upper template. The upper template has guide holes or guide grooves for guiding the cutter, and the lower template has clearance holes for avoiding the cutter. With this configuration, the cutter will only extend beyond the bottom surface of the upper template when the mounting platform is under pressure, preventing the cutter from prematurely contacting the cutting point. In addition, since the cutting assembly is mounted on the upper template, it does not need to be disassembled when changing different templates, making it more convenient to install, disassemble, and use.

[0009] Preferably, the cutter has a blade back that fits the outer edge of the lens. This design ensures that there is no sprue residue on the lens.

[0010] Preferably, the tip of the cutter does not extend beyond the mounting platform. This arrangement ensures the synchronization of the cutters.

[0011] Preferably, the depth of the lens positioning groove is no greater than the thickness of the lens. This arrangement facilitates the removal of the lens.

[0012] Preferably, the lens has a support handle, and the upper template and / or lower template are provided with a handle clearance groove for avoiding the support handle; the length of the handle clearance groove is less than the length of the support handle, and the depth of the handle clearance groove is not less than the thickness of the support handle. The length of the handle clearance groove is less than the length of the support handle, meaning the support handle can extend out of the lower template, allowing the lens to be removed by gripping the support handle, thus improving the safety of manual operation; the depth of the handle clearance groove is not less than the thickness of the support handle to accommodate lenses with different curvatures (generally, the support handle is connected to the edge of the lens dome).

[0013] Preferably, the bottom of the sprue clearance groove is provided with at least one air jet, and at least one air jet is inclined, with all inclined air jets having parallel orientations; the air jet is connected to an external air supply source. After cutting, air jets can be used to blow away the sprue waste, and the inclined air jets prevent the sprue waste from hitting the upper mold and bouncing back to the lower mold. By using air jets to remove waste, manual cleaning can be avoided, improving work efficiency and safety.

[0014] Preferably, the device further includes a controller, a control switch, and a grating assembly, all of which are connected to the controller. A grating assembly is located at least at the front end of the frame. The grating assembly includes a light emitter and a light receiver, which are positioned opposite each other and spaced apart. The drive unit is activated by triggering the control switch (such as a button or foot switch) and receiving feedback from the controller. The grating assembly acts as a safety feature; when the operator's hand is not extended from the frame, the light emitted by the light emitter is blocked, and the light receiver, not receiving the light, feeds back to the controller, preventing the drive unit from operating and thus ensuring the operator's safety.

[0015] Preferably, the system also includes an audible and visual alarm, which is connected to the controller and mounted on the frame. By installing the audible and visual alarm, the receiver can detect a human hand and trigger an alarm, thus promptly reminding operators to follow proper operating procedures and facilitating timely intervention and reprimand by management personnel.

[0016] This utility model has the following beneficial effects:

[0017] This invention ensures accurate lens positioning by incorporating a lens positioning groove and a sprue clearance groove to prevent the sprue from interfering with lens positioning. During mold closing between the upper and lower mold plates, the cutting component cuts off the connection point between the lens and the sprue, resulting in excellent cutting performance. Furthermore, the hollowed-out area prevents pressure on the lens's arched surface during mold closing, enabling this invention to be used with lenses of the same length and width but different curvatures, thus enhancing its versatility. Attached Figure Description

[0018] Figure 1This is a schematic diagram of a sunglass lens to be cut.

[0019] Figure 2 This is a schematic diagram of the present invention.

[0020] Figure 3 for Figure 2 Enlarged schematic diagram of part A.

[0021] Figure 4 This is a schematic diagram of the upper template and cutting components (the second spring is hidden).

[0022] Figure 5 This is a schematic diagram of the template and cutting components from another perspective.

[0023] Figure 6 This is a schematic diagram of the template below.

[0024] Explanation of symbols for main components:

[0025] Frame 10, guide sleeve 11, drive component 12;

[0026] Upper mold base 20, guide post 21, first equal height screw 22, first spring 23;

[0027] Upper template 30, cutter 31, mounting platform 32, second equal height screw 33, second spring 34, second through hole 35, guide groove 36, handle clearance groove 37, hollow area 38;

[0028] Lower template 40, clearance hole 41, sprue clearance groove 42, handle clearance groove 43, lens positioning groove 44, air jet 45;

[0029] Light emitter 51, light receiver 52;

[0030] Lens 61, sprue 62, support handle 63. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0032] In this case, we will take the cutting of a two-piece sunglass lens from a single sheet as an example. A two-piece sunglass lens from a single sheet... Figure 1 As shown, the lenses of these sunglasses also have injection-molded support stems.

[0033] like Figure 1-6As shown, this utility model discloses an optical lens sprue cutting device, the main body of which includes a frame 10, an upper mold base 20, an upper template 30, a lower template 40, and a driving component 12. The lower template 40 is detachably connected to the lower end of the frame 10 by bolts. The driving component 12 is located at the upper end of the frame 10 and drives the upper mold base 20 to move up and down. The driving component 12 can be an electro-hydraulic cylinder. In order to prevent rotation during the movement of the upper mold base 20 and ensure the directional stability and mold closing accuracy of the upper mold base 20, a guide post 21 can be provided on the upper mold base 20, and a guide sleeve 11 that cooperates with the guide post 21 is provided on the frame 10.

[0034] The upper template 30 is located below the upper mold base 20 and is positioned opposite the lower template 40. The upper template 30 is slidably connected to the upper mold base 20. Specifically, the upper template 30 is slidably connected to the upper mold base 20 via first equal-height screws 22. First through holes are provided at the four corners of the upper template 30, each corresponding to a first equal-height screw 22 and a first spring 23. The first equal-height screws 22 pass through the first through holes and the first springs 23 in sequence and are then threaded onto the upper mold base 20. Under normal conditions, the upper template 30 and the upper mold base 20 are spaced apart.

[0035] A cutting assembly is provided on the upper template 30. The cutting assembly includes at least two cutting blades 31, at least one mounting platform 32, at least two second equal-height screws 33, and at least two second springs 34. Each mounting platform 32 corresponds to at least one cutting blade 31, at least two second equal-height screws 33, and at least two second springs 34. The cutting blades 31 correspond one-to-one with the lens 61. In this embodiment, two cutting blades 31 are provided, and the two cutting blades 31 share one mounting platform 32. Of course, one cutting blade 31 can also be paired with one mounting platform 32. The second equal-height screws 33 correspond one-to-one with the second springs 34. The mounting platform 32 is located between the upper mold base 20 and the upper template 30. The mounting platform 32 is provided with second through holes 35 (stepped holes) that correspond one-to-one with the second equal-height screws 33. The second equal-height screws 33 pass through the second through holes 35 and the second springs 34 in sequence and are threaded to the upper template 30. The mounting platform 32 is slidably connected to the upper template 30 through the second equal-height screws 33. The cutter 31 is detachably connected to the mounting platform 32 by bolts, and the top of the cutter 31 does not extend beyond the mounting platform 32, so as to protect the cutter 31 and ensure the synchronization of the cutter 31.

[0036] The cutter 31 extends out from the bottom surface of the upper template 30. The upper template 30 has a guide hole or guide groove 36 for guiding the cutter 31, while the lower template 40 has a clearance hole 41 for avoiding the cutter 31. Under normal conditions, the mounting platform 32 is not subjected to pressure from the upper mold base 20. Under the force of the second spring 34, the tip (lower end) of the cutter 31 retracts into the guide hole or guide groove 36. During mold closing, the upper mold base 20 presses against the mounting platform 32, thereby pushing the cutter 31 downwards to perform the cutting action. The cutter 31 only extends out from the bottom surface of the upper template 30 when the mounting platform 32 is under pressure, preventing premature contact of the cutting point. Furthermore, since the cutting assembly is mounted on the upper template 30, it does not need to be disassembled when changing different templates, making installation, disassembly, and use more convenient.

[0037] Because the outer edge of the lens 61 is usually curved, and the curvature of the outer edge of lenses 61 with the same length and width but different curvatures is generally consistent, in this case, the cutter 31 is provided with a blade back that matches the outer edge of the lens 61 to ensure that there is no sprue 62 residue on the lens 61 after cutting.

[0038] The lower template 40 is provided with a sprue clearance groove 42, a handle clearance groove 4343, and two lens positioning grooves 44. The number of lens positioning grooves 44 corresponds to the number of lenses 61 on the same plate. The lenses 61 can be positioned in the lens positioning grooves 44. The depth of the lens positioning grooves 44 is not greater than the thickness of the lens 61 to facilitate the removal of the lens 61. The handle clearance grooves 4338 / 43 are used to avoid the support handle 63. Because the device of this utility model is to be adapted to lenses 61 with different curvatures, handle clearance grooves 4338 are also provided at the corresponding positions on the upper template 30. It is preferable that the depth of the two handle clearance grooves 4338 / 43 is not less than the thickness of the support handle 63. At the same time, it is also required that the length of the handle clearance grooves 4338 / 43 is less than the length of the support handle 63 so that the support handle 63 can extend out of the lower template 40 to facilitate loading and unloading and improve the safety of manual operation.

[0039] The sprue clearance groove 42 is used to avoid the sprue 62, so as not to interfere with the positioning of the lens 61. At least one air jet 45 is provided at the bottom of the sprue clearance groove 42, and at least one air jet 45 is inclined. All inclined air jets 45 are parallel to each other and are connected to an external air supply source. For example, an upward-opening air jet 45 is provided at the intersection of the sprue 62, and an inclined air jet 45 is provided near the front end of the frame 10 (the operator's work position). After the sprue 62 is cut off, compressed gas is introduced into the air jet 45, which can spray the waste material from the sprue 62 towards the rear end of the frame 10, thereby cleaning the waste material and improving work efficiency and safety.

[0040] To ensure that this device can adapt well to lenses 61 with different curvatures, this invention specifically provides a hollow area 38 on the upper template 30 that corresponds one-to-one with the lens positioning groove 44 and is used to avoid the arched surface of the lens 61. This hollow area 38 has a certain depth, meaning that the upper template 30 needs to have a certain thickness. The hollow area 38 is generally circular, which is beneficial for processing. The hollow area 38 ensures that the arched surface of the lens 61 will not be compressed when the mold is closed, thus enabling this invention to be used with lenses 61 of the same length and width but different curvatures (generally, lenses 61 of the same length and width but different curvatures have the same arc shape on both sides), making it more versatile.

[0041] To improve the controllability and safety of this device, the cutting device in this case is also equipped with a controller, control switches, a grating assembly, and an audible and visual alarm. The drive unit 12, control switches, grating assembly, and audible and visual alarm are all connected to the controller. A grating assembly is provided at least at the front end of the frame 10. The grating assembly includes a light emitter 51 and a light receiver 52, which are positioned opposite each other and spaced apart (the template is placed between the light emitter 51 and the light receiver 52). By triggering the control switch (such as a button, foot switch, etc.) and feeding back to the controller, the drive unit 12 is controlled to start. The grating assembly acts as a start-up protection mechanism. When the operator's hand is not extended from the frame 10, the light emitted by the light emitter 51 is blocked, and the light receiver 52, not receiving the light emitted by the light emitter 51, feeds back to the controller, thereby preventing the drive unit 12 from operating and ensuring the operator's safety. At the same time, the audible and visual alarm sounds, promptly reminding the operator to operate correctly and facilitating timely intervention and reprimand by management personnel.

[0042] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the protection scope of the present utility model.

Claims

1. An optical lens sprue cutting device, characterized in that: The device includes a frame, an upper mold base, an upper template, a lower template, and a driving component. The lower template is detachably connected to the lower end of the frame. The driving component is located at the upper end of the frame and drives the upper mold base to move up and down. The upper template is located below the upper mold base and is opposite to the lower template. The upper template is slidably connected to the upper mold base. The lower template has a sprue clearance groove and at least two lens positioning grooves. The upper template has a hollow area that corresponds one-to-one with the lens positioning grooves and is used to avoid the arched surface of the lens. The upper template also has a cutting component for cutting the sprue.

2. The optical lens sprue cutting device according to claim 1, characterized in that: It also includes a number of first equal-height screws and a first spring corresponding to each of the first equal-height screws. The upper template is provided with a first through hole corresponding to each of the first equal-height screws. The first equal-height screw passes through the first through hole and the first spring in sequence and is then threaded to the upper mold base. The upper template is slidably connected to the upper mold base through the first equal-height screws.

3. The optical lens sprue cutting device according to claim 1, characterized in that: The cutting assembly includes at least two cutters, at least one mounting platform, at least two second equal-height screws, and at least two second springs. Each mounting platform corresponds to at least one cutter, at least two second equal-height screws, and at least two second springs, with each second equal-height screw corresponding to a second spring. The mounting platform is located between the upper mold base and the upper template. The mounting platform has second through holes corresponding to each of the second equal-height screws. The second equal-height screws pass through the second through holes and the second springs in sequence and are threaded to the upper template. The mounting platform is slidably connected to the upper template via the second equal-height screws. The cutter is detachably connected to the mounting platform and can extend out of the bottom surface of the upper template. The upper template has guide holes or guide grooves for guiding the cutter, and the lower template has clearance holes for avoiding the cutter.

4. The optical lens sprue cutting device according to claim 3, characterized in that: The cutter has a blade back that is adapted to the outer edge of the lens.

5. The optical lens sprue cutting device according to claim 3, characterized in that: The tip of the cutter does not extend beyond the mounting platform.

6. The optical lens sprue cutting device according to claim 1, characterized in that: The depth of the lens positioning groove is not greater than the thickness of the lens.

7. The optical lens sprue cutting device according to claim 1, characterized in that: The lens has a support handle, and the upper template and / or lower template are provided with a handle clearance groove for avoiding the support handle; the length of the handle clearance groove is less than the length of the support handle, and the depth of the handle clearance groove is not less than the thickness of the support handle.

8. The optical lens sprue cutting device according to claim 1, characterized in that: The bottom of the water inlet avoidance channel is provided with at least one air jet, and the at least one air jet is inclined, and the orientations of all the inclined air jets are parallel to each other; the air jet is connected to an external air supply source.

9. The optical lens sprue cutting device according to claim 1, characterized in that: It also includes a controller, a control switch, and a grating assembly, all of which are connected to the controller; a grating assembly is provided at least at the front end of the frame; the grating assembly includes a light emitter and a light receiver, which are arranged opposite to each other and spaced apart.

10. The optical lens sprue cutting device according to claim 9, characterized in that: It also includes an audible and visual alarm, which is connected to the controller and is mounted on the rack.

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