CN216182341U

CN216182341U - Lens forming die

Info

Publication number: CN216182341U
Application number: CN202122575512.9U
Authority: CN
Inventors: 刘辉煌; 黄龙
Original assignee: Dongguan Yutong Optical Technology Co Ltd
Current assignee: Dongguan Yutong Optical Technology Co Ltd
Priority date: 2021-10-26
Filing date: 2021-10-26
Publication date: 2022-04-05
Anticipated expiration: 2031-10-26

Abstract

The utility model belongs to the technical field of lens manufacturing, and discloses a lens forming die which comprises a first die holder, a second die holder and an ejection assembly, wherein the first die holder is connected with a first die core, one end of the second die holder, which is close to the first die core, is connected with a second die core and a third die core, the ejection assembly comprises a push pipe and an ejection plate, the push pipe is slidably sleeved on the second die core and is positioned between the second die core and the third die core, the ejection plate is slidably arranged in the second die holder along the direction close to or far away from the first die holder, and the push pipe is fixedly connected with the ejection plate. The first mold core, the second mold core, the third mold core and the push pipe surround to form a mold cavity, a lens can be molded in the mold cavity, and then the push plate drives the push pipe to push out the lens, so that the lens manufacturing precision is improved, and the appearance defect is eliminated; and the ejector sleeve is fixedly connected to the ejector plate, so that the force applied to the ejector sleeve by the ejector plate is more balanced, and the action consistency of the ejector plate and the ejector sleeve is improved.

Description

Lens forming die

Technical Field

The utility model relates to the technical field of lens manufacturing, in particular to a lens forming mold.

Background

In the prior art, plastic lenses injection-molded by using a mold mostly adopt two modes to eject the molded lenses, on one hand, a mold core is used for ejecting, but an overlarge gap exists between the mold core and the mold core or a mold base, so that radial deviation is easy to generate, and the manufacturing precision of the lenses is reduced; on the other hand, the ejector pins are used for ejection, but the contact area between the ejector pins and the molded lens is too small, the ejection pressure on the lens is too large, and the appearance problems such as the ejector pin marks are easy to generate.

Based on the above situation, it is desired to design a lens forming mold to solve the above problems.

SUMMERY OF THE UTILITY MODEL

One object of the present invention is: provided is a lens forming mold, which can push out a lens by using a push pipe, improves the lens manufacturing precision and eliminates the appearance defect.

In order to achieve the purpose, the utility model adopts the following technical scheme:

a lens-forming mold comprising:

the first die holder is connected with a first die core;

the second die holder is connected with a second die core and a third die core at one end close to the first die core;

the ejection assembly comprises an ejection pipe and an ejection plate, the ejection pipe is slidably sleeved on the second die core and is positioned between the second die core and the third die core, the ejection plate is slidably arranged in the second die holder along a direction close to or far away from the first die holder, and the ejection pipe is fixedly connected to the ejection plate; the first mold core, the second mold core, the third mold core and the push pipe surround to form a mold cavity, and the ejector plate can drive the push pipe to eject the lens formed in the mold cavity.

As a preferable scheme, the ejection assembly further comprises a screw, and the screw connects the ejection plate and the push pipe.

As a preferred scheme, the second die holder comprises a lower die plate, a base plate and a bottom plate, the lower die plate, the base plate and the bottom plate are sequentially connected along the direction away from the first die holder, the second die core and the third die core are connected onto the lower die plate, a pushing channel is arranged between the base plate and the bottom plate, and the ejecting plate is slidably arranged in the pushing channel.

As a preferable scheme, the screw is provided with a limiting part, the screw penetrates through the base plate in a sliding manner and is connected to the push tube, and the limiting part can abut against the lower template to limit the screw to move in a direction close to the first die holder.

Preferably, the ejector plate is detachably connected to the bottom plate.

As a preferable scheme, one end of the ejector plate, which is close to the bottom plate, is provided with a threaded hole, and the bottom plate and the ejector plate can be screwed through the threaded hole.

As a preferred scheme, the ejection assembly further comprises an ejector pin, one end of the ejector pin is connected to the ejection plate, and the other end of the ejector pin can abut against the push pipe to push the push pipe.

As a preferable scheme, the ejector plate includes a first top plate and a second top plate, the ejector pin penetrates through the first top plate, the head portion of the ejector pin is embedded in the first top plate, and the second top plate is connected with the first top plate to clamp the head portion of the ejector pin.

As a preferred scheme, the first top plate is provided with a mounting hole, the mounting hole is coaxially communicated with the second top plate and the push rod hole on the bottom plate, the screw is mounted in the mounting hole, and a push rod of the injection molding equipment can abut against the screw.

Preferably, one of the first die holder and the second die holder is provided with a guide post, and the other die holder is provided with a guide hole, wherein the guide post can be inserted into the guide hole to guide the first die holder and the second die holder.

The utility model has the beneficial effects that: the lens forming die is provided, the first die holder is connected with the first die core, the second die holder is connected with the second die core and the third die core, the second die core is sleeved with the push pipe, and after a lens is formed in a cavity formed by the first die core, the second die core, the third die core and the push pipe in a surrounding mode, the push plate drives the push pipe to push out the lens, so that the lens manufacturing precision is improved, and the appearance defect is eliminated; and the ejector sleeve is fixedly connected to the ejector plate, so that the force applied to the ejector sleeve by the ejector plate is more balanced, and the action consistency of the ejector plate and the ejector sleeve is improved.

Drawings

The utility model is explained in more detail below with reference to the figures and examples.

FIG. 1 is a cross-sectional view of a lens-forming mold;

fig. 2 is a partially enlarged view of a portion a shown in fig. 1.

In fig. 1 to 2:

11. a first die holder; 111. a guide hole; 12. a first mold core;

21. a second die holder; 211. a lower template; 2111. a guide post; 212. a base plate; 213. a base plate; 214. a pushing channel; 22. a second mold core; 23. a third mold core;

3. ejecting the assembly; 31. pushing the tube; 32. ejecting the plate; 321. a first top plate; 3211. mounting holes; 322. a second top plate; 3221. a threaded hole; 3222. a push rod aperture; 33. a screw; 331. a limiting part; 34. a thimble;

4. a mold cavity.

Detailed Description

In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The technical scheme of the utility model is further explained by the specific implementation mode in combination with the attached drawings.

As shown in fig. 1 and fig. 2, the present embodiment provides a lens forming mold, which includes a first mold base 11, a second mold base 21 and an ejection assembly 3, wherein the first mold base 11 is connected to a first mold core 12 to form a fixed mold, one end of the second mold base 21 close to the first mold core 12 is connected to a second mold core 22 and a third mold core 23 to form a movable mold, and the second mold core 22 and the third mold core 23 are disposed opposite to the first mold core 12; the ejecting assembly 3 includes an ejector tube 31 and an ejector plate 32, the ejector tube 31 is slidably sleeved on the second mold core 22, and along the horizontal direction and the vertical direction, the ejector tube 31 is located between the second mold core 22 and the third mold core 23, that is, it can be seen that the second mold core 22 is fixed on the second mold base 21, the ejector tube 31 is slidably sleeved on the second mold core 22, the third mold core 23 is sleeved on the ejector tube 31 and fixed on the second mold base 21, so that the ejector tube 31 can slide along the axial direction of the second mold core 22 and is limited between the second mold core 22 and the third mold core 23, the ejector plate 32 is slidably disposed in the second mold base 21 along the direction close to or far from the first mold base 11, and the ejector tube 31 is fixedly connected to the ejector plate 32. The first mold core 12, the second mold core 22, the third mold core 23 and the push pipe 31 surround to form a mold cavity 4, a lens can be injection molded in the mold cavity 4, and then the push plate 32 drives the push pipe 31 to push the lens out of the mold cavity 4 along the axial direction of the second mold core 22. The lens is ejected by the ejector tube 31, so that the manufacturing precision of the lens is improved, the appearance defect caused by an ejector pin in the prior art is eliminated, and the ejector tube 31 is fixedly connected to the ejector plate 32, so that the force applied by the ejector plate 32 to the ejector tube 31 is more balanced, and the action consistency of the ejector plate 32 and the ejector tube 31 is improved.

In this embodiment, the ejection assembly 3 further includes screws 33, the specific number of which may be set according to the requirement, in this embodiment, three screws 33 are provided, the three screws 33 are disposed around the second mold core 22, the screws 33 connect the ejection plate 32 and the push pipe 31, the screws 33 are not standard components, and one end of each screw 33 is screwed into the push pipe 31, and the other end is connected to the ejection plate 32, which is a customized screw 33. In other embodiments of the present invention, the push pipe 31 may also penetrate through the second mold core 22 and be welded and fixed on the ejector plate 32, and the push pipe 31 may also be fixedly connected to the ejector plate 32.

Specifically, the second die holder 21 includes a lower die plate 211, a backing plate 212, and a bottom plate 213, the lower die plate 211, the backing plate 212, and the bottom plate 213 are sequentially connected along a direction away from the first die holder 11, the second die core 22 and the third die core 23 are connected to the lower die plate 211, a groove is formed at one end of the backing plate 212 close to the bottom plate 213, the groove of the backing plate 212 and the bottom plate 213 surround to form a pushing channel 214, and the ejecting plate 32 is slidably disposed in the pushing channel 214. And a return spring is arranged between the ejector plate 32 and the backing plate 212, after the ejector plate 32 drives the ejector tube 31 to eject the lens, the return spring can drive the ejector plate 32 to move along the direction away from the first die holder 11 so as to drive the ejector tube 31 to reset, and the screw 33 penetrates through the backing plate 212 and is connected to the ejector tube 31.

As a preferred embodiment, the screw 33 is provided with a limiting portion 331, the screw 33 of this embodiment includes a first cylinder and a second cylinder, the first cylinder is connected with the second cylinder, the second cylinder is connected with the head of the screw 33, the diameter of the second cylinder is greater than that of the first cylinder, and the step at the junction of the first cylinder and the second cylinder is the limiting portion 331; correspondingly, the lower template 211 is provided with a first through hole, the backing plate 212 is provided with a second through hole communicated with the first through hole, and the diameter of the second through hole is larger than that of the first through hole. The first cylinder can run through the first through hole and the second through hole, and the second cylinder can only pass through the second through hole, so that when the screw 33 excessively displaces, the limiting part 331 can abut against the end face of the lower template 211 to limit the displacement of the screw 33, and the reliability is improved. In other embodiments of the present invention, a groove may be formed in a side wall of the screw 33, and a boss may be disposed on an inner wall of the second through hole, and the boss may abut against the groove wall to limit the movement of the screw 33.

In a preferred embodiment, the ejector plate 32 is detachably connected to the bottom plate 213, and when the screw 33 penetrates through the ejector plate 32 and is locked to the push tube 31, the ejector plate 32 is first connected to the bottom plate 213, and after the screw 33 is locked, the connection between the ejector plate 32 and the bottom plate 213 is detached. The ejection plate 32 can be prevented from moving and the screw 33 cannot be locked, the screw 33 is prevented from carrying the ejection plate 32 to excessively compress the return spring, and the assembly operation is simplified.

Specifically, a threaded hole 3221 is opened at one end of the ejecting plate 32 close to the bottom plate 213, and the connecting member can penetrate through the bottom plate 213 and be screwed to the sidewall of the threaded hole 3221, so as to realize the detachable connection between the ejecting plate 32 and the bottom plate 213, and the structure is simple. In other embodiments of the present invention, the ejecting plate 32 and the bottom plate 213 may be clamped by a lock or two clamping plates.

In this embodiment, the ejecting assembly 3 further includes an ejector pin 34, one end of the ejector pin 34 is connected to the ejecting plate 32, and the other end of the ejector pin 34 penetrates through the backing plate 212 and can be abutted to the push pipe 31, the specific number of the ejector pins 34 can be set according to the requirement, in this embodiment, three ejector pins 34 are provided, and the three ejector pins 34 are disposed to wrap the second mold core 22. After the lens is injection molded in the cavity 4, the ejector plate 32 drives the push tube 31 to eject the lens out of the cavity 4 along the axial direction of the second mold core 22 through the ejector pin 34 and the screw 33, the cooperation of the ejector pin 34 and the screw 33 further balances the stress of the push tube 31, and the assembly is simple.

Specifically, the ejector plate 32 includes a first top plate 321 and a second top plate 322, the first top plate 321 is located on one side of the second top plate 322 close to the lower mold plate 211, the ejector pins 34 penetrate through the first top plate 321, the head portions of the ejector pins 34 are embedded in the first top plate 321, and the second top plate 322 is attached to the first top plate 321 to clamp and fix the head portions of the ejector pins 34, so that the ejector pins 34 are connected to the ejector plate 32, and the structure is simple. In other embodiments of the present invention, the ejector pin 34 may be threaded onto the ejector plate 32.

In this embodiment, the first top plate 321 is provided with a mounting hole 3211, the second top plate 322 and the bottom plate 213 are provided with a push rod hole 3222, and the push rod hole 3222 is coaxially disposed and communicated with the mounting hole 3211, so that a head of the screw 33 for connecting the first top plate 321 and the push tube 31 is abutted in the mounting hole 3211, thereby simplifying the mounting operation of the screw 33. The push rod of the injection molding apparatus can pass through the push rod hole 3222 and abut against the head of the screw 33 to drive the screw 33 and the first top plate 321 to move in a direction approaching the first mold base 11, so as to drive the push tube 31 to eject the lens out of the mold cavity 4. In other embodiments of the present invention, in the same manner as the thimble 34, the screw 33 is first inserted through the second top plate 322 and connected to the push tube 31, the second top plate 322 is then connected to the first top plate 321 to clamp and fix the screw 33, and the push rod pushes the second top plate 322 to carry the screw 33.

In this embodiment, the guide post 2111 is mounted on the lower template 211 of the second die holder 21, the guide hole 111 coaxial with the guide post 2111 is formed in the first die holder 11, and when the first die holder 11 and the second die holder 21 perform the die opening or closing operation, the guide post 2111 can be inserted into the guide hole 111 to provide guidance for the first die holder 11 and the second die holder 21, thereby improving reliability. In another embodiment of the present invention, the guide post 2111 may be mounted on the first die holder 11, and the guide hole 111 may be opened on the second die holder 21, which may also serve as a guide.

In the description herein, it is to be understood that the terms "upper," "lower," "left," "right," and the like are based on the orientation or positional relationship shown in the drawings for convenience in description and simplicity of operation, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the present invention. Furthermore, the terms "first" and "second" are used merely for descriptive purposes and are not intended to have any special meaning.

In the description herein, references to the description of "an embodiment," "an example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

In addition, the foregoing is only the preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the utility model. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A lens-forming mold, comprising:

the first die holder (11) is connected with a first die core (12);

a second die holder (21), one end of which close to the first die core (12) is connected with a second die core (22) and a third die core (23);

the ejection assembly (3) comprises an ejection pipe (31) and an ejection plate (32), the ejection pipe (31) is slidably sleeved on the second die core (22) and is positioned between the second die core (22) and the third die core (23), the ejection plate (32) is slidably arranged in the second die holder (21) along a direction close to or far away from the first die holder (11), and the ejection pipe (31) is fixedly connected to the ejection plate (32); the first mold core (12), the second mold core (22), the third mold core (23) and the push pipe (31) surround to form a mold cavity (4), and the ejector plate (32) can drive the push pipe (31) to eject the lens formed in the mold cavity (4).

2. The lens forming mold according to claim 1, characterized in that the ejector assembly (3) further comprises a screw (33), the screw (33) connecting the ejector plate (32) and the ejector tube (31).

3. The lens forming mold of claim 2, wherein the second mold base (21) comprises a lower mold plate (211), a backing plate (212) and a bottom plate (213), the lower mold plate (211), the backing plate (212) and the bottom plate (213) are sequentially connected in a direction away from the first mold base (11), the second mold core (22) and the third mold core (23) are connected to the lower mold plate (211), a pushing channel (214) is arranged between the backing plate (212) and the bottom plate (213), and the pushing plate (32) is slidably arranged in the pushing channel (214).

4. The lens forming mold according to claim 3, characterized in that the screw (33) is provided with a limiting portion (331), the screw (33) slidably penetrates through the backing plate (212) and is connected to the push tube (31), and the limiting portion (331) can abut against the lower template (211) to limit the movement of the screw (33) in a direction close to the first mold base (11).

5. The lens forming mold of claim 3, wherein the ejector plate (32) is removably connected to the base plate (213).

6. The lens forming mold according to claim 5, wherein a threaded hole (3221) is opened at one end of the ejector plate (32) close to the bottom plate (213), and the bottom plate (213) and the ejector plate (32) can be screwed through the threaded hole (3221).

7. The lens-forming mold of claim 3, characterized in that the ejector assembly (3) further comprises an ejector pin (34), one end of the ejector pin (34) being connected to the ejector plate (32) and the other end being capable of abutting against the ejector tube (31) to push the ejector tube (31).

8. The lens forming mold according to claim 7, wherein the ejector plate (32) comprises a first top plate (321) and a second top plate (322), the ejector pin (34) penetrates through the first top plate (321) and a head portion of the ejector pin (34) is embedded in the first top plate (321), and the second top plate (322) is connected to the first top plate (321) to clamp the head portion of the ejector pin (34).

9. The lens forming mold according to claim 8, wherein the first top plate (321) is provided with a mounting hole (3211), the mounting hole (3211) is coaxially communicated with the second top plate (322) and a push rod hole (3222) on the bottom plate (213), the screw (33) is mounted in the mounting hole (3211), and a push rod of an injection molding device can abut against the screw (33).

10. The lens-forming mold of claim 1, characterized in that one of the first mold shoe (11) and the second mold shoe (21) is fitted with a guide post (2111), the other one being opened with a guide hole (111), the guide post (2111) being insertable into the guide hole (111) to guide the first mold shoe (11) and the second mold shoe (21).