CN205416228U - Hot runner structure of optical lens piece mould - Google Patents

Abstract

The utility model discloses a hot runner structure of optical lens piece mould, go up mould (1) and can relatively open and shut and enclose into lower mould (2) of die cavity (3) with last mould (1) including fixed, last mould (1) in be equipped with purt mouth (4), the output and die cavity (3) of purt mouth (4) communicate with each other, last mould (1) in still be equipped with and be used for penetrating mouth (5) of raw materials melting of moulding plastics, the output and purt mouth (4) input of penetrating mouth (5) meet, penetrating mouth (5) go up the cover and be equipped with heating wire (6) that are used for its heating, the input and the outside feeding device of penetrating mouth (5) meet, last mould (1) on still seted up and to carry purt mouth (4) and carry out refrigerated cooling channel (7) to purt mouth (4) with the coolant liquid. The utility model discloses simple structure can practice thrift manufacturing cost to production efficiency is high, and optics product stable quality.

Description

A hot runner structure for an optical lens mold

【Technical field】

The utility model relates to a mold, in particular to a hot runner structure of an optical lens mold.

【Background technique】

At present, the processing of optical lenses is generally mold injection molding. The structure of a traditional optical lens mold generally includes an upper mold and a lower mold. The upper mold and the lower mold are combined to form a cavity for forming an optical lens. A nozzle communicating with the cavity is arranged in the upper mold, and molten plastic is injected into the nozzle. The nozzle of the mold is located outside the mold. Since the nozzle must be connected with the nozzle, the nozzle of this mold structure is very long, resulting in a long main channel of the gating system. Although this mold has a simple structure and is easy to process, And the molding conditions are easy to adjust, but this mold structure has the following disadvantages: 1. The waste of plastic materials is serious, because when the optical lenses in the cavity are solidified and formed, the plastic raw materials in the nozzle will also solidify, because the nozzle is very Long, so there is a lot of solidified plastic material in the flow channel of the nozzle, and this part of the material needs to be cut and separated from the formed optical lens, but this part of the material cannot be recycled and reused to form the optical lens, so in the flow channel of the nozzle The solidified plastic material is a waste; 2. The molding cycle is long. Because the nozzle is very long, it takes a long time to cool the plastic material in it, and the cavity filling and pressure holding time are also long, resulting in a long product molding cycle; 3. Wire drawing The phenomenon is obvious. If the nozzle is very long, it will easily cause wire drawing of the molded product, which will affect the product quality; 4. Since the nozzle is very long, and the flow channel of the nozzle communicates with the cavity, the space of the cavity is actually large. Due to the large cavity space, more gas is produced, which is not conducive to the stability of the product; 5. The temperature of the nozzle cannot be controlled, which will affect the structural accuracy of the hot runner of the entire optical lens mold, because the contact position between the nozzle and the nozzle The temperature can reach about 300 degrees.

Therefore, the utility model just produces based on above deficiency.

【Content of utility model】

The purpose of the utility model is to overcome the deficiencies of the prior art, and provide a hot runner structure of an optical lens mold with a simple structure, which can save production costs, high production efficiency, and stable quality of optical products. The hot runner structure of this optical lens mold makes the lens molding cycle short, material saving, product (optical lens) precision, size, shape and other aspects meet the technical requirements on the drawing, especially the surface profile of the product (optical lens) The degree (surface PV value) reaches 1um or less than 0.5um, and the eccentricity is less than 3um.

The utility model is achieved through the following technical solutions:

A hot runner structure for an optical lens mold, comprising a fixed upper mold 1 and a lower mold 2 that can be opened relative to the upper mold 1 and encloses a molding cavity 3 with the upper mold 1, and is characterized in that: the upper mold 1 is equipped with There is a nozzle 4, the output end of the nozzle 4 communicates with the cavity 3, the upper mold 1 is also provided with a nozzle 5 for melting the injection molding raw material, the output end of the nozzle 5 is connected to the nozzle The input ends of the nozzles 4 are connected, the nozzle 5 is covered with a heating wire 6 for heating, the input end of the nozzle 5 is connected with an external feeding device, and the upper mold 1 is also A cooling passage 7 capable of delivering cooling liquid to the nozzle 4 to cool the nozzle 4 is provided.

The hot runner structure of the above-mentioned optical lens mold is characterized in that: the upper mold 1 includes a fixed side mold plate 11, the nozzle 4 is arranged in the fixed side mold plate 11, and the fixed side mold plate 11 The plate 11 is detachably connected with a fixed-side take-off plate 12, the nozzle 5 passes through the fixed-side take-off plate 12 and is connected to the input end of the nozzle 4, and the fixed-side take-off plate 12 is detachably connected with a fixed-side take-off plate 12. An additional plate 13 , the fixed side additional plate 13 is provided with a connection hole 14 for connecting an external feeding device with the input end of the nozzle 5 .

The hot runner structure of the above-mentioned optical lens mold is characterized in that: the lower mold 2 includes a movable side mold plate 21 that surrounds the cavity 3 with the fixed side mold plate 11, and the movable side mold plate 11 A movable side support plate 22 is detachably connected to the side profile plate 21 , and a movable side take-off plate 23 is detachably connected to the movable side support plate 22 .

The above-mentioned hot runner structure of the optical lens mold is characterized in that: the nozzle 4 is also sleeved with a temperature-sensing line 8 for measuring its temperature.

The above-mentioned hot runner structure of the optical lens mold is characterized in that: the nozzle 4 is also provided with an annular water channel communicating with the cooling channel 7 .

The hot runner structure of the above-mentioned optical lens mold is characterized in that: the upper mold 1 is provided with a guide hole 15, and the lower mold 2 is provided with a guiding hole when it is closed with the upper mold 1. guide post 24.

The hot runner structure of the above-mentioned optical lens mold is characterized in that: the upper mold 1 is also provided with a tapered guide post 25, and the lower mold 2 is also provided with a tapered guide post 25. Tapered guide sleeve 26.

Compared with the prior art, the utility model has the following advantages:

1. In the upper mold of the present utility model, there is a nozzle for melting the injection molding raw materials. The output end of the nozzle is connected with the input end of the pump nozzle. The nozzle is covered with a heating wire for heating it. The input end is connected with the external feeding device, and the upper mold is also provided with a cooling channel, which can deliver the cooling liquid to the nozzle. The hot runner structure of this kind of lens mold can solve the problem that the temperature of the hot runner is too high in the past, which affects the temperature of the mold, and causes the temperature difference between the upper mold and the lower mold by controlling the temperature of the cooling liquid. Now through the control of the cooling liquid temperature, it can solve the difference of the mold temperature of the previous hot runner structure and ensure the precision of the mold. The nozzle is set inside the upper mold, so the length of the nozzle can be shortened. Therefore, the length of the main channel of the entire gating system is shortened, and the plastic material solidified and formed in the nozzle becomes less, reducing waste. The length of the track is shortened, the product molding cycle is shortened, the production efficiency is improved, and the quality of the product is also greatly improved.

2. The utility model has the advantages of simple and compact structure, low cost, and by controlling the temperature at the hot runner, it can ensure the temperature balance of the mold, so the precision of the mold is also well guaranteed, and the surface profile of the product (lens) produced in this way ( The surface PV value) reaches 1um or less than 0.5um, and the eccentricity is less than 3um, so it is suitable for popularization and application.

【Description of drawings】

Fig. 1 is one of schematic diagram of the utility model;

Fig. 2 is the second of the utility model schematic diagram;

Fig. 3 is a schematic diagram of a hot runner structure of a conventional mold.

【detailed description】

Below in conjunction with accompanying drawing, the utility model will be further described:

A hot runner structure for an optical lens mold, comprising a fixed upper mold 1 and a lower mold 2 that can be opened relative to the upper mold 1 and surrounds a molding cavity 3 with the upper mold 1, and the upper mold 1 is provided with a nozzle 4 , the output end of the nozzle 4 communicates with the cavity 3, the upper mold 1 is also provided with a nozzle 5 for melting the injection molding raw material, the output end of the nozzle 5 is connected to the input end of the nozzle 4 connected, the nozzle 5 is covered with a heating wire 6 for heating it, the input end of the nozzle 5 is connected with an external feeding device, and the upper mold 1 is also equipped with a The cooling liquid is delivered to the nozzle 4 to cool the cooling channel 7 for the nozzle 4 . The nozzle 5 is set inside the upper mold 1, so the length of the nozzle 4 can be shortened. Therefore, the length of the main channel of the entire pouring system is shortened, and the plastic material solidified and formed in the nozzle 4 becomes less, reducing Waste is eliminated, and because the length of the main channel is shortened, the product molding cycle is shortened, the production efficiency is improved, and the quality of the product is also greatly improved. Since the plastic is always in a molten state in the nozzle 5, the short nozzle 4 greatly shortens the main channel of the gating system. The shortening is more than 55%, and it is conducive to the realization of automatic production.

The upper die 1 includes a fixed-side profile 11, the nozzle 4 is set in the fixed-side profile 11, and the fixed-side profile 11 is detachably connected with a fixed-side take-off plate 12, and the described The nozzle 5 passes through the fixed side take-off plate 12 and is connected with the input end of the nozzle 4, the fixed side take-off plate 12 is detachably connected with a fixed side additional plate 13, and the fixed side additional plate 13 is provided with a The connection hole 14 that the external feeding device is connected with the input end of the nozzle 5 .

The lower mold 2 includes a movable side mold plate 21 that surrounds the cavity 3 with the fixed side mold plate 11, and a movable side support plate 22 is detachably connected to the movable side mold plate 21, The movable side support plate 22 is detachably connected with a movable side take-off plate 23 .

The detachable connections in this article can generally be bolted.

The nozzle 4 is also covered with a temperature-sensing line 8 for measuring its temperature. The temperature sensing line 8 can detect the temperature of the nozzle 4, thereby controlling the melting state of the plastic material in the nozzle 4.

The nozzle 4 is also provided with an annular waterway (not shown in the figure) that communicates with the cooling channel 7. The annular waterway surrounds the nozzle 4, which can cool the nozzle 4 well, and ensure that the nozzle 4 is cooled evenly everywhere.

The upper mold 1 is provided with a guide hole 15, and the lower mold 2 is provided with a guide column 24 for guiding when it is closed with the upper mold 1 . The cooperation of the guide column 24 and the guide hole 15 plays a guiding role, which is very accurate in opening and closing the mold. The upper mold 1 is provided with an ultra-precise and finely positioned tapered guide post 25, and the described lower die 2 is provided with an ultra-precisely positioned tapered guide sleeve 26, which can be precisely positioned during mold closing, so the opening and closing The mold positioning is very precise.

Claims (7)

1. A hot runner structure of an optical lens mold, comprising a fixed upper mold (1) and a lower mold (2) that can be opened relative to the upper mold (1) and encloses a molding cavity (3) with the upper mold (1), It is characterized in that: the upper mold (1) is provided with a nozzle (4), the output end of the nozzle (4) communicates with the cavity (3), and the upper mold (1) is also provided with a There is a nozzle (5) for melting the injection molding raw material, the output end of the nozzle (5) is connected with the input end of the nozzle (4), and the nozzle (5) is sleeved with a Heated heating wire (6), the input end of the nozzle (5) is connected to the external feeding device, and the upper mold (1) is also equipped with a cooling liquid that can be delivered to the nozzle (4) and Cooling channel (7) for cooling the nozzle (4). 2. The hot runner structure of the optical lens mold according to claim 1, characterized in that: the upper mold (1) includes a fixed side mold plate (11), and the nozzle (4) is arranged on the fixed side In the template (11), the fixed side template (11) is detachably connected with a fixed side take-off plate (12), and the described nozzle (5) passes through the fixed side take-off plate (12) to connect with the pump The nozzle (4) is connected to the input end, and the fixed-side take-off plate (12) is detachably connected with a fixed-side additional plate (13), and the fixed-side additional plate (13) is provided with an external feeding device and an injector. The connection hole (14) that the input end of the mouth (5) is connected. 3. The hot runner structure of the optical lens mold according to claim 2, characterized in that: the lower mold (2) includes a movable mold that forms the cavity (3) with the fixed side mold plate (11). The movable side profile (21), the movable side support plate (22) is detachably connected to the movable side profile (21), and the movable side support plate (22) is detachably connected with a movable side support plate (22). The movable side takes and pays plate (23). 4. The hot runner structure of the optical lens mold according to claim 1, 2 or 3, characterized in that: the nozzle (4) is also sleeved with a temperature-sensing line (8) for measuring its temperature. 5. The hot runner structure of the optical lens mold according to claim 1, 2 or 3, characterized in that: the nozzle (4) is also provided with an annular water channel communicating with the cooling channel (7). 6. The hot runner structure of the optical lens mold according to claim 1, 2 or 3, characterized in that: the upper mold (1) is provided with guide holes (15), and the lower mold (2) It is provided with a guide post (24) that guides when it is matched with the upper mold (1). 7. The hot runner structure of the optical lens mold according to claim 1, 2 or 3, characterized in that: the upper mold (1) is also provided with a tapered guide post (25), and the lower mold (2) is also provided with a tapered guide sleeve (26) cooperating with the tapered guide post (25).