CN210634080U

CN210634080U - Optical lens variable mold temperature forming structure combination

Info

Publication number: CN210634080U
Application number: CN201920985584.0U
Authority: CN
Inventors: 黄岳烽; 李小波; 叶金辉; 徐钉; 王浩浩
Original assignee: Zhejiang Sunny Optics Co Ltd
Current assignee: Zhejiang Sunny Optics Co Ltd
Priority date: 2019-06-27
Filing date: 2019-06-27
Publication date: 2020-05-29
Anticipated expiration: 2029-06-27

Abstract

The utility model provides an optical lens piece becomes mould temperature shaping structure combination, include: the mold comprises a sprue bush and an injection molding cavity, wherein the sprue bush is provided with an injection molding runner communicated with the injection molding cavity; the first heat exchange water channel is at least partially positioned on the circumferential outer side of the injection molding runner so as to refrigerate or heat the sprue bush. The technical scheme of the utility model the problem of the optical lens piece shaping inefficiency among the prior art has been solved effectively.

Description

Optical lens variable mold temperature forming structure combination

Technical Field

The utility model relates to a technical field that optical device moulded plastics particularly, relates to an optical lens piece becomes mould temperature shaping structure combination.

Background

In recent years, with the rapid development of mobile electronic industries such as smart phone industry, the demand for the camera lens mounted inside the mobile electronic industry is increasing, which in turn drives the development of optical lens manufacturing industry, and the demand for the optical lens is increasing, so how to improve the lens productivity becomes an important issue to be solved urgently. Under the condition of unchanging the existing field and resource conditions, increasing the number of cavities, improving the yield and shortening the forming period become the key points of research and development of lens manufacturers.

The existing optical lens is mainly made of plastic materials and is manufactured by adopting a precision injection molding method. The traditional lens is naturally cooled and formed at the mold temperature, and the cooling stage usually takes half or more of the whole forming period. In the actual forming process, the lens is light and thin in structure and can be rapidly cooled and solidified to reach the demolding state, the melt of the main runner of the sprue bush and the melt of the tail end part of the sprue bush are more, and the cooling is slow, so that the forming efficiency of the lens is greatly limited. However, in order to ensure the molding quality of the optical lens, the injection mold for manufacturing the optical lens is often compact in structure, and the size of the sprue bush itself is small, and it is difficult for the conventional method to effectively cool the part, so how to shorten the cooling period and improve the productivity on the premise of ensuring the quality of the optical lens becomes a problem which needs to be solved urgently.

In the above case, a sprue bush cooling the melt at the injection runner portion appears, which does accelerate the solidification of the melt, but at the same time, causes a reduction in the sprue bush temperature. Before the next filling, if the sprue bush is not heated to the temperature suitable for filling, the influence on the product quality is possibly caused, particularly for optical lens products with short molding cycles, the temperature of the sprue bush can only be raised through the heat conduction of the template after the temperature of the sprue bush is reduced, the temperature rise range is limited in a short time, and during the next filling, if the molten material passes through the sprue bush with low temperature, the flowability is possibly reduced, and the adverse influence on the lens surface shape, eccentricity and appearance is possibly caused.

SUMMERY OF THE UTILITY MODEL

A primary object of the present invention is to provide a variable mold temperature molding structure combination for optical lenses to solve the problem of low molding efficiency of the optical lenses of the injection molding device in the prior art.

In order to achieve the above object, the utility model provides an optical lens piece becomes mould temperature shaping structure combination, include: the special-shaped waterway center thimble bushing and the special-shaped waterway sprue bushing are structurally combined, and the special-shaped waterway center thimble bushing and the special-shaped waterway sprue bushing are structurally combined to comprise a special-shaped waterway center thimble bushing and a special-shaped waterway sprue bushing; the water inlets and the water outlets of the special-shaped waterway sprue bush and the special-shaped waterway center thimble bush are communicated with the water holes of the mould template, and cold/hot media can be introduced into the special-shaped waterway in the sprue bush and the special-shaped waterway center thimble bush through variable mould temperature equipment.

Furthermore, spiral water paths are arranged inside the sprue bush and the central thimble bush, a clearance groove is formed in the middle section of the cylinder, and an annular clearance groove is also formed in the lower end face of the special-shaped water path sprue bush hanging table.

Furthermore, the variable-mold-temperature equipment intermittently introduces cold/heat media into the special-shaped water channel to realize variable-mold-temperature forming.

The utility model also provides a optics lens becomes mould temperature shaping structure combination, include: the mold comprises an injection molding runner and an injection molding cavity, and the sprue bush is provided with an injection molding runner communicated with the injection molding cavity; the first heat exchange water channel is at least partially positioned on the circumferential outer side of the injection molding runner so as to refrigerate or heat the sprue bush.

Further, the mold comprises a fixed side mold plate and a sprue bush, the fixed side mold plate is provided with a sprue bush mounting channel, the sprue bush is at least partially mounted in the sprue bush mounting channel, and the injection molding runner is formed on the sprue bush.

Further, the sprue bush is provided with an accommodating channel, the injection molding runner is located in the accommodating channel, and the first heat exchange water channel is located between the side wall of the accommodating channel and the side wall of the injection molding runner.

Furthermore, the outer diameter of the sprue bush is matched with the inner diameter of the sprue bush mounting channel, and a gap is formed between the first heat exchange water channel and the side wall of the sprue bush.

Further, the mould further comprises a movable side mould plate and an ejector pin lining, the movable side mould plate is provided with an ejector pin lining installation channel, the ejector pin lining is at least partially installed in the ejector pin lining installation channel, the movable side mould plate is installed on the second side of the fixed side mould plate, and the first side of the fixed side mould plate is opposite to the second side of the fixed side mould plate.

Furthermore, the mould also comprises a second heat exchange water channel which is arranged in the thimble bushing and communicated with the first heat exchange water channel.

Further, optical lens becomes mould temperature forming structure combination still includes becomes mould temperature equipment, becomes mould temperature equipment and includes heat transfer medium and trunk line, and the trunk line all communicates with first heat transfer water course and second heat transfer water course.

Use the technical scheme of the utility model, after finishing moulding plastics, let in the lower fluid of temperature in first heat transfer water course, the lower fluid of temperature takes away the heat of the inside melt of runner of moulding plastics through the heat transfer, and this cooling time at optical lens material handle position has been saved widely. When injection molding is needed, fluid with higher temperature passes through the first heat exchange water channel, and the fluid with higher temperature raises the temperature of the sprue bush to a proper filling state through heat exchange, so that the temperature rise time of the sprue bush is greatly saved. The optical lens variable-mold-temperature forming structure combination greatly improves the injection molding efficiency and ensures the quality of injection molded products. The technical scheme of the utility model the problem of the optical lens piece shaping inefficiency among the prior art has been solved effectively.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 shows a schematic overall structural view of an embodiment of a combination of optical lens variable mold temperature forming structures according to the present invention;

FIG. 2 is a schematic diagram of a combined sprue bushing and first heat exchange water channel of the optical lens variable mold temperature forming structure of FIG. 1;

FIG. 3 is a schematic diagram of the ejector pin bushing and the second heat exchange water channel of the optical lens sheet variable mold temperature molding structure of FIG. 1; and

fig. 4 is a schematic diagram showing a mating structure of a sprue bush and a thimble bush of the optical lens variable-mold-temperature molding structure of fig. 1.

Wherein the figures include the following reference numerals:

10. a mold; 11. injection molding a runner; 12. injection molding a product; 13. fixing the side template; 14. a sprue bush; 15. fixing the side-taking auxiliary plate; 151. a first liquid inlet drainage channel; 152. a first liquid outlet drainage channel; 16. a movable side template; 17. a thimble bushing; 18. a movable side support plate; 181. a second liquid inlet drainage channel; 182. a second liquid outlet drainage channel; 20. a first heat exchange water channel; 21. a first heat exchange water channel inlet; 22. a first heat exchange water channel outlet; 30. a second heat exchange water channel; 31. a second heat exchange water channel inlet; 32. a second heat exchange water channel outlet; 40. a variable mold temperature device; 41. a high temperature unit; 42. a low temperature unit; 43. a switching unit; 100. a first void-avoiding heat insulation groove; 200. a second clearance heat insulation groove; 300. barrel binding surface; 400. and melting the material.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

As shown in fig. 1 to 4, a mold temperature varying molding structure assembly for an optical lens of the present application includes: the special-shaped waterway center thimble bushing and the special-shaped waterway sprue bushing are structurally combined, and the special-shaped waterway center thimble bushing and the special-shaped waterway sprue bushing are structurally combined to comprise the special-shaped waterway center thimble bushing and a special-shaped waterway sprue bushing. The water inlets and the water outlets of the special-shaped waterway sprue bush and the special-shaped waterway center thimble bush are communicated with the water holes of the mould template, and cold/hot media can be introduced into the special-shaped waterway in the sprue bush and the special-shaped waterway center thimble bush through variable mould temperature equipment. The inner parts of the sprue bush and the central thimble bush are respectively provided with a spiral water path, the middle section of the cylinder is provided with a clearance groove, and the lower end surface of the special-shaped water path sprue bush hanging table is also provided with an annular clearance groove. The variable-mold-temperature equipment intermittently introduces cold/heat media into the special-shaped water channel to realize variable-mold-temperature forming. The centre thimble bush of the special-shaped waterway is a thimble bush 17 in the following description.

As shown in fig. 1 to 4, the optical lens mold temperature varying forming structure of the present embodiment includes: the mold comprises a mold 10 and a first heat exchange water channel 20, wherein the mold 10 comprises a sprue bush 14 and an injection molding cavity, and the sprue bush 14 is provided with an injection molding runner 11 communicated with the injection molding cavity. The first heat exchange watercourse 20 is located at least partially circumferentially outside the injection runner 11 to cool or heat the sprue bushing 14.

By applying the technical scheme of this embodiment, after the injection molding is completed, the fluid with a lower temperature is introduced into the first heat exchange water channel 20, and the fluid with a lower temperature takes away the heat of the melt 400 inside the injection molding runner 11 through heat exchange, which greatly saves the cooling time of the injection molding runner 11 of the optical lens (injection molding product 12). When injection molding is required, a relatively high temperature fluid is passed through the first heat exchange flume 20, and the relatively high temperature fluid increases the temperature of the sprue bushing 14 to a suitable filling temperature through heat exchange, which greatly saves the warm-up time of the sprue bushing 14. The optical lens variable-mold-temperature forming structure combination greatly improves the injection molding efficiency and ensures the quality of the injection molding product 12. The technical scheme of this embodiment has solved the problem that the optical lens shaping among the prior art is inefficient effectively.

In the solution of the embodiment, as shown in fig. 1, the mold 10 comprises a fixed side template 13 and a sprue bush 14, the fixed side template 13 has a sprue bush mounting channel, the sprue bush 14 is at least partially mounted in the sprue bush mounting channel, and the injection runner 11 is formed on the sprue bush 14. Specifically, the sprue bush 14 is further provided with a barrel binding surface 300, and the structure is low in processing cost and good in injection molding effect.

As shown in fig. 2, in the solution of the present embodiment, the sprue bush 14 has a receiving channel, the injection runner 11 is located in the receiving channel, and the first heat exchange water channel 20 is located between a side wall of the receiving channel and a side wall of the injection runner 11. The above-described structure allows the first heat exchange water channel 20 to heat or cool the sprue bush 14 with high efficiency. Specifically, the first heat exchange water channel 20 may be a heat exchange pipe or a heat exchange fin structure.

As shown in fig. 2, in the solution of the present embodiment, the outer diameter of the sprue bush 14 is adapted to the inner diameter of the sprue bush mounting channel, and the first heat exchange water channel 20 has a gap with the sidewall of the sprue bush 14. The structure enables the first heat exchange water channel 20 to exchange heat with the fixed side-shaped plates 13 as few as possible, so that the heat exchange efficiency of the first heat exchange water channel 20 is higher. Specifically, the gap between the first heat exchange water channel 20 and the sidewall of the sprue bushing 14 is also called a first void-avoiding heat insulation groove 100.

As shown in fig. 2, in the solution of the present embodiment, the first heat exchange water channel 20 includes a spiral pipe, and the spiral pipe is wound on the circumferential outer side of the injection molding flow channel 11. The spiral pipeline is coiled on the circumferential outer side of the injection molding runner 11, so that the heat exchange area of the first heat exchange water channel 20 is larger, and the heat exchange effect between the first heat exchange water channel 20 and the sprue bush 14 is better. Specifically, the cold and hot medium flowing in the first heat exchange water channel 20 may be water, heat transfer oil, or the like. The spiral pipeline is of a single spiral structure, and can be of a double-spiral structure in order to improve the heat exchange efficiency.

As shown in fig. 1 and fig. 2, in the technical solution of this embodiment, the mold 10 further includes a fixed side taking-off plate 15, the fixed side taking-off plate 15 is located on a first side of the fixed side shaping plate 13, the fixed side shaping plate 13 has a first liquid inlet drainage channel 151 and a first liquid outlet drainage channel 152, the first liquid inlet drainage channel 151 is communicated with the first heat exchange water channel inlet 21, and the first liquid outlet drainage channel 152 is communicated with the first heat exchange water channel outlet 22. The pipeline of the variable-mould-temperature equipment 40 is connected with the first liquid inlet drainage channel 151 and the first liquid outlet drainage channel 152, and a circulation loop is formed.

As shown in fig. 1, 3 and 4, in the solution of the present embodiment, the mold 10 further includes a movable side mold plate 16 and an ejector pin bushing 17, the movable side mold plate 16 has an ejector pin bushing mounting channel, the ejector pin bushing 17 is at least partially mounted in the ejector pin bushing mounting channel, the movable side mold plate 16 is mounted on a second side of the fixed side mold plate 13, and the first side of the fixed side mold plate 13 is disposed opposite to the second side of the fixed side mold plate 13. The injection molding effect of the structure is good and corresponding, and the outer diameter of the ejector pin bushing 17 is matched with the inner diameter of the ejector pin bushing mounting channel.

As shown in fig. 3, in the present embodiment, the mold 10 further includes a second heat exchange water channel 30, and the second heat exchange water channel 30 is disposed in the thimble bushing 17 and is communicated with the first heat exchange water channel 20. The arrangement of the second heat exchange water channel 30 further improves the heat exchange efficiency of the optical lens variable-mold-temperature forming structure combination. Specifically, the first heat exchange water channel 20 and the second heat exchange water channel 30 are both communicated with the main pipeline of the variable mold temperature device 40, so that the cold and hot media of the first heat exchange water channel 20 and the second heat exchange water channel 30 are synchronous, and other pipelines are omitted. The structure reduces the cost of the combination of the variable-mold-temperature forming structure of the optical lens.

As shown in fig. 3, in the technical solution of this embodiment, the mold 10 further includes a movable side supporting plate 18, the movable side supporting plate 18 is located on one side of the movable side shaping plate 16 far away from the fixed side shaping plate 13, a second liquid inlet drainage channel 181 and a second liquid outlet drainage channel 182 are provided on the movable side supporting plate 18, the second liquid inlet drainage channel 181 is communicated with the second heat exchange water channel inlet 31, and the second liquid outlet drainage channel 182 is communicated with the second heat exchange water channel outlet 32. The structure is compact, the processing cost is low, and the heat exchange effect is good. The illustration shows the path of the melt 400 and the location of the formation of the injection molded product 12.

As shown in fig. 1, in the technical solution of this embodiment, the optical lens mold temperature changing and forming structure assembly further includes a mold temperature changing device 40, the mold temperature changing device 40 includes a heat exchange medium and a main pipe, and the main pipe is communicated with both the first heat exchange water channel 20 and the second heat exchange water channel 30. The variable mold temperature device 40 comprises a high temperature unit 41, a low temperature unit 42 and a switching unit 43, and the independent arrangement of the high temperature unit 41, the low temperature unit 42 and the switching unit 43 ensures that the high temperature medium and the low temperature medium can be supplied in time.

The sprue bush 14 is a 3D printing spiral waterway sprue bush, the upper part of the sprue bush 14 is an injection molding machine barrel binding surface 300, a spiral waterway (a first heat exchange waterway 20) surrounding the injection molding runner 11 is arranged in the sprue bush, and a water inlet (a first heat exchange waterway inlet 21) and a water outlet (a first heat exchange waterway outlet 22) of the waterway are positioned on the upper end surface of the sprue bush 14. The lower end face and the cylinder middle section of the sprue bush 14 in contact with the fixed side template 13 are provided with a first space-avoiding heat insulation groove 100 which is of an annular structure, and the first space-avoiding heat insulation groove 100 is used for reducing heat exchange generated by the contact of the sprue bush 14 and the fixed side template 13 and improving the cooling and heating efficiency of the variable-mold-temperature equipment 40 on the sprue bush 14. Preferably, the spiral waterway is a double-spiral waterway; the wall thickness between the pipe diameters of the spiral water paths is more than 1.5 mm; the clearance of the spiral waterway from the inner wall surface of the outer wall of the sprue bush 14 is about 1 mm; the wall thickness of the spiral waterway is more than 1.5mm away from the main runner.

The thimble bushing 17 is a set of central thimbles, and a spiral water channel (a second heat exchange water channel 30) is also arranged in the central thimble bushing, so that the distance between the inlet 31 of the second heat exchange water channel and the outlet 32 of the second heat exchange water channel is smaller than that of the sprue bush 14. The center thimble bushing is provided with a void-avoiding groove (second void-avoiding heat-insulating groove 200) to reduce a contact area with the movable side-shaped plate 16, and to improve heating/cooling efficiency of the second heat exchange water passage 30. As the skilled person guides, the first heat exchange water channel 20 and the second heat exchange water channel 30 are provided with sealing means.

The mold temperature varying device 40 includes a high temperature unit 41, a low temperature unit 42, and a switching unit 43, and the sprue bush 14 and the thimble bush 17 supply flow rates. The high temperature unit 41 is a mold temperature machine for heating the sprue bush 14 and the thimble bush 17, and can supply hot water at high pressure. The low temperature unit 42 is a mold temperature machine for cooling the sprue bush 14 and the thimble bush 17, and may supply cooling water. The switching unit 43 is a device capable of controlling the delivery of hot and cold water, and is connected to the high temperature unit 41 and the low temperature unit 42, and can store a small amount of hot and cold water, and the switching unit 43 opens and closes the valves at different time nodes of the molding cycle through appropriate setting conditions to provide cold water or hot water in cooperation with the production of the optical lens (injection molded product 12).

In the injection molding process, the mold temperature changing device 40 feeds low-temperature water into the sprue bush 14 and the thimble bush 17 at the pressure maintaining stage after the molten material 400 is injected, after a delay time, cold water enters the thimble bush 17 to accelerate the solidification of the molten material 400 in the injection molding runner to a demolding state, and is switched to hot water at the cooling stage or after the cooling is completed to heat the sprue bush 14, and the sprue bush 14 is rapidly heated to a proper filling temperature through the heating at the mold opening and closing stage to be refilled. By the method, the quality of the optical lens can be guaranteed, the molding period is shortened, and the molding efficiency is improved.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides an optical lens becomes mould temperature shaping structure combination which characterized in that includes:

the special-shaped waterway center thimble bushing and the special-shaped waterway sprue bushing are structurally combined, and the special-shaped waterway center thimble bushing and the special-shaped waterway sprue bushing are structurally combined to comprise a special-shaped waterway center thimble bushing and a special-shaped waterway sprue bushing;

the water inlets and the water outlets of the special-shaped waterway sprue bush and the special-shaped waterway center thimble bush are communicated with the water holes of the mould template, and cold/hot media can be introduced into the special-shaped waterway in the sprue bush and the special-shaped waterway center thimble bush through variable mould temperature equipment.

2. The mold temperature changing molding structure combination of optical lens pieces according to claim 1, wherein the sprue bush and the center thimble bushing are each provided with a spiral water passage therein, the middle section of the column body is provided with a clearance groove, and the lower end surface of the special-shaped water passage sprue bush hanging table is also provided with an annular clearance groove.

3. The mold temperature-varying molding structure combination of optical lenses according to claim 2, wherein the mold temperature-varying device intermittently supplies cold/hot medium to the irregular water path to realize the mold temperature-varying molding.

4. The utility model provides an optical lens becomes mould temperature shaping structure combination which characterized in that includes:

the mould (10), the said mould (10) includes pouring gate cover (14) and moulds the lumen, the said pouring gate cover (14) has runner (11) of injection moulding communicated with said mould lumen;

a first heat exchange water channel (20), wherein the first heat exchange water channel (20) is at least partially positioned on the circumferential outer side of the injection molding runner (11) to cool or heat the sprue bush (14).

5. The optical lens variable mold temperature molding structure combination according to claim 4, wherein the mold (10) comprises a fixed side template (13) and a sprue bush (14), the fixed side template (13) has a sprue bush mounting channel, the sprue bush (14) is at least partially mounted in the sprue bush mounting channel, and the injection runner (11) is formed on the sprue bush (14).

6. The optical lens mold temperature changing molding structure combination according to claim 5, wherein the sprue bush (14) has a receiving channel, the injection molding runner (11) is located in the receiving channel, and the first heat exchange water channel (20) is located between a side wall of the receiving channel and a side wall of the injection molding runner (11).

7. The optical lens mold temperature changing molding structure combination according to claim 6, wherein the outer diameter of the sprue bush (14) is adapted to the inner diameter of the sprue bush mounting channel, and the first heat exchange water channel (20) has a gap with the side wall of the sprue bush (14).

8. The mold temperature changing molding structure combination of optical lens piece according to claim 5, wherein the mold (10) further comprises a movable side mold plate (16) and an ejector pin bushing (17), the movable side mold plate (16) having an ejector pin bushing mounting channel, the ejector pin bushing (17) being at least partially mounted in the ejector pin bushing mounting channel, the movable side mold plate (16) being mounted on a second side of the fixed side mold plate (13), the first side of the fixed side mold plate (13) being disposed opposite to the second side of the fixed side mold plate (13).

9. The mold temperature-varying molding structure combination of optical lens according to claim 8, wherein the mold (10) further comprises a second heat exchange water channel (30), the second heat exchange water channel (30) being disposed in the ejector pin bushing (17) and communicating with the first heat exchange water channel (20).

10. The optical lens mold temperature changing molding structure combination according to claim 9, further comprising a mold temperature changing device (40), wherein the mold temperature changing device (40) comprises a heat exchange medium and a main pipe, and the main pipe is communicated with both the first heat exchange water channel (20) and the second heat exchange water channel (30).