CN212045827U

CN212045827U - Step-by-step molding optical lens injection mold

Info

Publication number: CN212045827U
Application number: CN202020191995.5U
Authority: CN
Inventors: 李荣洲; 谭沿河; 姚雅兰
Original assignee: Dongguan Jingcai Optics Co ltd
Current assignee: Dongguan Jingcai Optics Co ltd
Priority date: 2020-02-20
Filing date: 2020-02-20
Publication date: 2020-12-01
Anticipated expiration: 2030-02-20

Abstract

The utility model provides an optical lens injection mold for step-by-step molding, which comprises an upper backing plate, an upper template, a lower template, a limiting plate, a lower die holder and a lower backing plate which are arranged from top to bottom in sequence, wherein the bottom of the lower template is provided with a convex module; a die core abdicating hole is formed in the lower template, a stripping abdicating hole is formed in the limiting plate, a spring abdicating groove is formed in the bottom of the lower template, and a first spring is arranged in the spring abdicating groove; be fixed with first mould stem on the limiting plate, be equipped with second mould stem around the first mould stem, first mould stem and all equal sliding connection of second mould stem in the mould core hole of stepping down, the top of first mould stem is equipped with the subchannel of moulding plastics, and the top of second mould stem is equipped with a die cavity, and the bottom of second mould stem is connected with the roof. The utility model discloses can compress the structure of adjustment die cavity of moulding plastics after moulding plastics to ensure that the surface of the optical lens piece that obtains can not form defects such as recess, finally can effectively ensure optical lens piece quality well.

Description

Step-by-step molding optical lens injection mold

Technical Field

The utility model relates to an injection mold specifically discloses a step by step fashioned optical lens piece injection mold.

Background

The method is used for obtaining various dies and tools of required products by injection molding, blow molding, extrusion, die casting or forging forming, smelting, stamping and other methods in industrial production. The injection mold is a tool for producing plastic products and also a tool for endowing the plastic products with complete structures and accurate sizes, and particularly relates to a method for injecting heated and melted plastics into a mold cavity from an injection molding machine at high pressure and obtaining a molded product after cooling and solidification.

The injection mold can be used for producing various injection molded parts, and the optical lenses can be divided into glass lenses and plastic lenses, and the plastic lenses are obtained by injection molding. In the prior art, plastic optical lenses are manufactured by injecting molten plastic with good optical performance into an injection mold after mold closing, and the flow of the molten plastic is easily obstructed due to factors such as height difference, air pressure difference and the like in the injection molding process, so that the performance of the finally obtained optical lenses is poor.

SUMMERY OF THE UTILITY MODEL

Therefore, it is necessary to provide an optical lens injection mold for step-by-step molding, which can adjust the structure of a cavity after injection molding by step-by-step mold closing, and can effectively ensure good quality of an optical lens.

In order to solve the prior art problem, the utility model discloses an optical lens piece injection mold of step-by-step molding, including from last to the upper padding plate, cope match-plate pattern, lower bolster, limiting plate, lower bolster and the lower bolster that set gradually down, the upper padding plate is fixedly connected with the cope match-plate pattern, and the limiting plate, lower bolster and lower bolster between fixed connection, the bottom of lower bolster is equipped with n protruding module, and n is the integer that is greater than 1, is equipped with the sprue of moulding plastics in the cope match-plate pattern;

the lower die plate is provided with die core abdicating holes, the limiting plate is provided with n stripping abdicating holes, the bottom of the lower die plate is provided with at least two spring abdicating grooves, each spring abdicating groove is provided with a first spring, two ends of the first spring are respectively connected with the limiting plate and the lower die plate, and the lower die base is provided with a lifting abdicating cavity;

be fixed with first mould stem on the limiting plate, be equipped with a n second mould stem around the first mould stem, first mould stem and the equal sliding connection of all second mould stem in the mould core hole of stepping down, each second mould core post respectively sliding connection in each takes off the material hole of stepping down, the top of first mould stem is equipped with the subchannel of moulding plastics, the top of every second mould stem all is equipped with a die cavity, connect through the subchannel of moulding plastics between each die cavity, the bottom of second mould stem is connected with the roof, roof sliding connection is in the intracavity of stepping down and stepping down.

Furthermore, the bottom of the lower template is provided with at least two guide grooves, each guide groove is internally and slidably connected with a guide pillar, and the guide pillars are fixedly connected with the limiting plates.

Furthermore, the top of the second die core column is provided with a butt joint branch runner which is connected with the injection molding sub-runner and the concave die cavity.

Furthermore, a material ejecting and yielding hole is formed in the lower base plate, a material ejecting block is fixed at the bottom of the top plate, and the material ejecting block is connected to the material ejecting and yielding hole in a sliding mode.

Further, a second spring is connected between the top plate and the limiting plate.

The utility model has the advantages that: the utility model discloses a step-by-step fashioned optical lens piece injection mold is provided with special substep compound die structure, can compress the structure of adjustment die cavity of moulding plastics after moulding plastics, makes the melting plastic can fill the inner space that is full of the die cavity of moulding plastics to ensure that the surface of the optical lens piece that obtains can not form defects such as recess, can also effectively extrude the inside air of melting plastic, thereby avoid the inside formation gas pocket of the optical lens piece that obtains, finally can effectively ensure that the optical lens piece quality is good.

Drawings

Fig. 1 is a schematic structural view of the mold closing and injection molding device of the present invention.

Fig. 2 is a schematic structural view of the die assembly press molding of the present invention.

Fig. 3 is a schematic structural view of the mold opening and discharging of the present invention.

Fig. 4 is an enlarged schematic structural diagram of a in fig. 1 according to the present invention.

The reference signs are: the injection molding device comprises an upper base plate 10, an upper die plate 11, a male die block 12, an injection molding main runner 13, a lower base plate 20, a material ejecting abdicating hole 201, a lower die seat 21, a lifting abdicating cavity 211, a limiting plate 22, a material stripping abdicating hole 221, a guide post 222, a lower die plate 23, a die core abdicating hole 231, a spring abdicating groove 232, a guide groove 233, a first spring 24, a first die core column 30, an injection molding sub-runner 31, a second die core column 40, a female die cavity 41, a butt joint branch runner 411, a top plate 42, a material ejecting block 43 and a second spring 44.

Detailed Description

For further understanding of the features and technical means of the present invention, as well as the specific objects and functions attained by the present invention, the present invention will be described in further detail with reference to the accompanying drawings and detailed description.

Refer to fig. 1 to 4.

The embodiment of the utility model discloses step-by-step molded optical lens piece injection mold, including from last upper padding plate 10, upper die plate 11, lower bolster 23, limiting plate 22, die holder 21 and the lower bolster 20 that sets gradually down, upper padding plate 10 and upper die plate 11 fixed connection, fixed connection between limiting plate 22, die holder 21 and the lower bolster 20, the bottom of lower bolster 23 is equipped with n convex mould pieces 12, n is the integer that is greater than 1, is equipped with the injection molding sprue 13 in the upper die plate 11;

a mold core abdicating hole 231 is formed in the lower template 23, n stripping abdicating holes 221 are formed in the limiting plate 22, at least two spring abdicating grooves 232 are formed in the bottom of the lower template 23, a first spring 24 is arranged in each spring abdicating groove 232, two ends of each first spring 24 are respectively connected with the limiting plate 22 and the lower template 23, namely the bottom of each spring abdicating groove 232, the length of each first spring 24 is L under the action of gravity of the lower template 23 and without the action of other external force, the depth of each spring abdicating groove 232 is D, L is larger than D, and a lifting abdicating cavity 211 is formed in the lower die holder 21;

a first die core column 30 is fixed on the limiting plate 22, the height of the first die core column 30 is equal to the thickness of the lower die plate 23, n second die core columns 40 are arranged around the first die core column 30, in the condition that the injection mold is not subjected to any external force, the first mold core legs 30 and all the second mold core legs 40 are slidably connected in the mold core relief holes 231, each second die core column 40 is respectively connected in each stripping yielding hole 221 in a sliding manner, an injection molding runner 31 is arranged at the top of the first die core column 30, a concave die cavity 41 is arranged at the top of each second die core column 40, each concave die cavity 41 is positioned under each convex die block 12, the injection molding main runner 13 is positioned over the injection molding runner 31, each concave die cavity 41 is connected through the injection molding runner 31, the bottoms of all the second die core columns 40 are connected with a same top plate 42, the top plate 42 is also called a top plate, and the top plate 42 is connected in the lifting yielding cavity 211 in a sliding manner.

The working process is as follows: firstly, injection molding, as shown in fig. 1, an external press pushes an upper cushion plate 10 and an upper mold plate 11 to descend until the upper mold plate 11 contacts a lower mold plate 23, at the moment, a first spring 24 is in a non-compression state, and sufficient molten plastic is injected into a female mold cavity 41 through an injection main runner 13 and an injection sub-runner 31; secondly, pressing and molding, as shown in fig. 2, an external press machine continues to push the upper cushion plate 10 and the upper mold plate 11 to descend, the first spring 24 is compressed, the lower mold plate 23 is pressed by the upper mold plate 11 to descend towards the limiting plate 22, the first mold core column 30 and the second mold core column 40 both ascend relative to the lower mold plate 23 until the bottom surface of the lower mold plate 23 contacts with the top surface of the limiting plate 22, at the moment, the top surfaces of the first mold core column 30 and the second mold core column 40 both contact with the bottom surface of the upper mold plate 11, the male mold block 12 extends into the female mold cavity 41, an injection mold cavity is formed between the female mold cavity 41 and the male mold block 12, the male mold block 12 presses the molten plastic in the female mold cavity 41, so that air in the molten plastic can be effectively reduced, after cooling and molding, the quality of the molded optical lens can be effectively; and thirdly, stripping, as shown in fig. 3, the press drives the upper cushion plate 10 and the upper mold plate 11 to ascend, the upper mold plate 11 is separated from the lower mold plate 23 to ascend, the first spring 24 resets and extends to drive the lower mold plate 23 to ascend relative to the limiting plate 22 to prepare for next injection molding, the external stripping driving mechanism drives the top plate 42 to ascend, the top plate 42 drives all the second mold core columns 40 to ascend relative to the first mold core column 30, the formed connecting ribs are separated from the injection molding runner 31 to ascend, the whole injection molding piece can be taken out through clamping the connecting ribs, no influence is caused on the surface of the optical lens in the injection molding or stripping process, and the molding quality of the optical lens can be effectively ensured.

In this embodiment, the bottom of the lower template 23 is provided with at least two guide grooves 233, each guide groove 233 is connected with a guide post 222, the guide posts 222 are fixedly connected with the top surface of the limiting plate 22, and the guide posts 222 slide in the guide grooves 233 to move up and down, so that the stability and reliability of the lower template 23 relative to the lifting motion of the limiting plate 22 can be effectively improved, and the lower template 23 is prevented from shifting in the lifting process.

In this embodiment, a pair of branch runners 411 is further disposed at the top of each second mold core column 40, each branch runner 411 is connected to the injection runner 31 and each cavity 41, that is, a pair of branch runners 411 is further connected between the injection runner 31 and each cavity 41, so as to ensure that the connection position between the first mold core column 30 and the second mold core column 40 is on the connecting rib, even if a bad structure such as burr is formed, the bad structure will also appear on the surfaces of the connecting rib in the injection runner 31 and the branch runner 411, and the bad structure such as burr formed in the injection molding process of the surface structure of the obtained optical lens can be effectively avoided.

In this embodiment, be equipped with liftout hole 201 of stepping down in the lower bolster 20, the bottom of roof 42 is fixed with liftout piece 43, and liftout piece 43 sliding connection can avoid the emergence skew of roof 42 lift in-process in the liftout hole 201 of stepping down.

In the present embodiment, the second spring 44 is connected between the top plate 42 and the stopper plate 22, and the stability of the lifting operation of the top plate 42 can be effectively improved by the second spring 44.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The step-by-step molding optical lens injection mold is characterized by comprising an upper liner plate (10), an upper mold plate (11), a lower mold plate (23), a limiting plate (22), a lower mold base (21) and a lower liner plate (20) which are sequentially arranged from top to bottom, wherein the upper liner plate (10) is fixedly connected with the upper mold plate (11), the limiting plate (22), the lower mold base (21) and the lower liner plate (20) are fixedly connected, n convex modules (12) are arranged at the bottom of the lower mold plate (23), n is an integer greater than 1, and an injection molding main runner (13) is arranged in the upper mold plate (11);

the die core abdicating hole (231) is formed in the lower die plate (23), n stripping abdicating holes (221) are formed in the limiting plate (22), at least two spring abdicating grooves (232) are formed in the bottom of the lower die plate (23), a first spring (24) is arranged in each spring abdicating groove (232), two ends of each first spring (24) are respectively connected with the limiting plate (22) and the lower die plate (23), and a lifting abdicating cavity (211) is formed in the lower die base (21);

be fixed with first mould stem (30) on limiting plate (22), be equipped with n second mould stem (40) around first mould stem (30), first mould stem (30) and all equal sliding connection in second mould stem (40) in mould core abdication hole (231), each second mould stem (40) sliding connection respectively in each take off the material and abdication hole (221), the top of first mould stem (30) is equipped with injection moulding subchannel (31), every the top of second mould stem (40) all is equipped with a die cavity (41), each pass through between die cavity (41) injection moulding subchannel (31) is connected, the bottom of second mould stem (40) is connected with roof (42), roof (42) sliding connection in the chamber (211) of stepping down.

2. The step-by-step molding optical lens injection mold according to claim 1, wherein the bottom of the lower mold plate (23) is provided with at least two guide grooves (233), each guide groove (233) is slidably connected with a guide pillar (222), and the guide pillar (222) is fixedly connected with the limiting plate (22).

3. The step-by-step optical lens injection mold of claim 1, wherein each of the second mold core columns (40) is further provided with a pair of branch runners (411) at the top, and the branch runners (411) connect the injection runner runners (31) and the cavity (41).

4. The step-by-step molding optical lens injection mold according to claim 1, wherein the lower backing plate (20) is provided with a material ejecting and avoiding hole (201), the bottom of the top plate (42) is fixed with a material ejecting block (43), and the material ejecting block (43) is slidably connected in the material ejecting and avoiding hole (201).

5. The step-by-step molding optical lens injection mold according to claim 1, wherein a second spring (44) is connected between the top plate (42) and the limiting plate (22).