阅读说明：本技术 一种光学玻璃精密模压生产装置 (Precision mould pressing production device for optical glass ) 是由 黄国雅 宋敏 吴梦 邱超 张娇龙 于 2020-04-24 设计创作，主要内容包括：本发明提供一种光学玻璃精密模压生产装置,属于光学玻璃精密模压技术领域。它主要是解决目前精密模压需预型体光学冷加工而存在加工周期长、玻璃材料利用率低、工艺复杂和整体成本高的问题。它的主要特征是：预型体成型控制部腔内设有发热控温系统和预型体滑道,预型体滑道上设有出气方向倾斜向上的惰性气体入口管；精密模压机腔内仅设有接料工位、压型工位和水冷工位；漏料装置下端漏料口伸入预型体成型控制部腔内,并位于预型体滑道上端的接料口上方；预型体滑道下端的预型体出口伸入精密模压机腔内,并位于接料工位上方。本发明具有无需预型体光学冷加工的特点,适合各类光学玻璃精密模压,特别适合高Tf(软化点)玻璃的精密模压。(The invention provides an optical glass precision die pressing production device, and belongs to the technical field of optical glass precision die pressing. The method mainly solves the problems of long processing period, low utilization rate of glass materials, complex process and high overall cost of the prior precision die pressing which needs optical cold processing of a preform. It is mainly characterized in that: a heating temperature control system and a preform slideway are arranged in the preform molding control part cavity, and an inert gas inlet pipe with an air outlet direction inclined upwards is arranged on the preform slideway; the precise mould pressing machine cavity is only provided with a material receiving station, a profiling station and a water cooling station; a material leakage port at the lower end of the material leakage device extends into the cavity of the preform molding control part and is positioned above a material receiving port at the upper end of the preform slide way; the preform outlet at the lower end of the preform slideway extends into the cavity of the precision molding press and is positioned above the material receiving station. The invention has the characteristic of no need of optical cold working of a preform, is suitable for precision die pressing of various optical glass, and is particularly suitable for precision die pressing of high Tf (softening point) glass.)

1. The utility model provides an optical glass precision mould pressing apparatus for producing, the device contains glass melting portion (1), preform shaping control division (2) and precision moulding press (3), glass melting portion (1) comprises glass smelting pot (11) and hourglass material device (12), its characterized in that: a heating temperature control system (21) and a preform slideway (22) are arranged in the cavity of the preform molding control part (2), and an inert gas inlet pipe (222) with an upward air outlet direction is arranged on the preform slideway (22); the cavity of the precision mould press (3) is only provided with a material receiving station, a profiling station and a water cooling station; a material leakage port (13) at the lower end of the material leakage device (12) extends into the cavity of the preform molding control part (2) and is positioned above a material receiving port (221) at the upper end of the preform slide way (22); and a preform outlet (223) at the lower end of the preform slide way (22) extends into the cavity of the precision molding press (3) and is positioned above the material receiving station.

2. The precision press-molding production apparatus for optical glass according to claim 1, wherein: the material leakage device (12) adopts a heating device with current temperature control; the heating temperature control system (21) adopts a radiation or heat conduction heating mode, and heating parts of the heating temperature control system are annularly and uniformly distributed around the material receiving port (221).

3. The precision press-molding production apparatus for optical glass according to claim 1 or 2, wherein: the material receiving port (221) is in a funnel shape with a large upper part and a small lower part, and the preform slide way (22) below the material receiving port (221) comprises an upright main pipe at the upper section and a bent pipe or other extension pipes at the lower section.

4. The precision press-molding production apparatus for optical glass according to claim 1 or 2, wherein: the included angle between the inert gas inlet pipe (222) and the vertical direction is 25-70 degrees.

5. The precision press-molding production apparatus for optical glass according to claim 1 or 2, wherein: the profiling station comprises more than one profiling station with gradually reduced pressure; the water cooling station comprises more than one water cooling station.

6. The precision press-molding production apparatus for optical glass according to claim 1 or 2, wherein: the preform molding control part (2) adopts a sealed cavity and is provided with a vacuumizing interface and an inert gas access interface.

7. The precision press-molding production apparatus for optical glass according to claim 3, wherein: the lower section of the preform slideway (22) is a spiral bent pipe.

Technical Field

The invention belongs to the technical field of precision mould pressing of optical glass, and particularly relates to a precision mould pressing production device of optical glass. The production device can drop molten glass into a precision mould pressing die to directly press spherical and aspheric optical elements, and the production device can realize batch production of the spherical and aspheric optical elements.

Background

In recent years, due to rapid development in the fields of security, surveillance, digital cameras, mobile phones, and the like, aspheric lenses are favored by optical designers when the market demands lighter and smaller products.

In the traditional production of the aspheric lens, firstly, glass melting production, optical cold processing (complex procedures of glass cutting, coarse grinding, fine grinding, polishing, excircle processing and the like) of a preform and precision compression molding are required. The manufacturing method has the advantages of long processing period, low utilization rate of glass materials, complex process and high overall cost.

Patent CN106116116B discloses an optical precision aspheric glass compression molding equipment, and this equipment mould position has heating device to realize precision mould pressing production, and equipment power consumption is big, has increased manufacturing cost.

Patent CN109250895A discloses a method for manufacturing aspheric optical glass lens and a mold thereof, but the preform thereof has high processing cost and increased production cost.

Disclosure of Invention

The invention provides a novel optical glass precision die pressing production device, which integrates glass smelting and precision die pressing and can realize die pressing production of spherical and aspherical lenses of optical glass.

The technical solution of the invention is as follows: the utility model provides an optical glass precision mould pressing apparatus for producing, contains glass melting portion, preform shaping control portion and precision moulding press, glass melting portion comprises glass smelting pot and hourglass material device which characterized in that: a heating temperature control system and a preform slideway are arranged in the preform molding control part cavity, and an inert gas inlet pipe with an air outlet direction inclined upwards is arranged on the preform slideway; the precise mould pressing machine cavity is only provided with a material receiving station, a profiling station and a water cooling station; a material leakage port at the lower end of the material leakage device extends into the cavity of the preform molding control part and is positioned above a material receiving port at the upper end of the preform slide way; and a preform outlet at the lower end of the preform slide way extends into the cavity of the precision molding press and is positioned above the material receiving station. During production, glass liquid produced by a glass melting part is dropped or sheared into a preform slide way of a preform forming control part by controlling the flow rate and the volume by a material leaking device, inert gas is introduced into an inert gas inlet pipe to enable a glass preform to be in a suspension state, the temperature of the dropped preform is regulated by a temperature control system, the inert gas is introduced into the cut preform and falls into the preform slide way, the preform is rolled into a mold of a precision mold press, the precision mold press starts to operate and mold to form spherical lenses or non-spherical lenses, and continuous production can be carried out repeatedly.

The material leakage device in the technical scheme of the invention adopts a heating device with current temperature control; the heating temperature control system adopts a radiation or heat conduction heating mode, and heating parts of the heating temperature control system are annularly and uniformly distributed around the material receiving port.

The material receiving port is in a funnel shape with a large upper part and a small lower part, and the preform slide way below the material receiving port comprises an upper vertical main pipeline and a lower bent pipe or other extension pipelines.

In the technical scheme of the invention, the included angle between the inert gas inlet pipe and the vertical direction is 25-70 degrees.

The profiling station in the technical scheme of the invention comprises more than one profiling station with gradually reduced pressure; the water cooling station comprises more than one water cooling station.

The preform molding control part in the technical scheme of the invention adopts a sealed cavity and is provided with a vacuumizing interface and an inert gas access interface.

The lower section of the preform slideway in the technical scheme of the invention is a spiral bent pipe.

The invention has the following beneficial effects: the glass from the smelting furnace directly enters precision mould pressing equipment to be formed into an aspheric lens, so that the processing procedures of glass strip cutting, blank processing, polishing and other preform in the traditional production process are eliminated, the glass utilization rate is high, and the cost is low; the precision molding press is directly molded without mounting a preform preheating module, so that the energy consumption is low, the structure of the precision molding press is simple, and the service life of the mold is prolonged; the problem that the surface defect is easily generated due to secondary heating of the preform can be solved, and the product smoothness is guaranteed.

Drawings

In order to more clearly illustrate the technical solution in the implementation of the present invention, the drawings needed to be used in the embodiments will be briefly described below.

FIG. 1 is a schematic structural diagram of a novel precision press-molding production device for optical glass according to the present invention.

Fig. 2 is a schematic illustration of the position of the inert gas inlet tube and preform slide of the present invention.

1-glass melting section

11-glass furnace

12-leaking device

13-leakage orifice

2-preform Molding control section

21-temperature control system

22-preform slide

221-receiving opening

222-inert gas inlet tube

223-preform outlet

3-precision mould press

31-mould.

Detailed Description

As shown in FIG. 1, an optical glass precision press-molding production device is provided, wherein a glass melting part 1 consists of a glass melting furnace 11 and a material leaking device 12; the preform forming control part 2 is positioned below the material leakage device 12, and the material leakage opening 13 is positioned in the cavity of the preform forming control part 2; the precision press 3 is located below the preform molding control section 2 and connected to the preform slide 22 through the preform molding control section 2. During production, the glass liquid produced by the glass melting part 1 is dropped or sheared into a preform slide way 22 of the preform forming control part 2 by controlling the flow rate and the volume through the material leaking device 12, inert gas is introduced into an inert gas inlet pipe 222 to enable the glass preform to be in a suspension state, the temperature of the dropped preform is adjusted by the temperature control system 21, the preform falls into the preform slide way 22 after gas cut, the preform rolls into a mold 31 of the precision mold press 3, the precision mold press 3 starts to operate and mold to form spherical lenses or non-spherical lenses, and continuous production can be realized repeatedly.

The material leakage device 12 adopts a heating device with current temperature control. The optical glass is fully melted in the glass melting part 1, when in production, glass liquid flows out through the material leaking device 12, the material leaking device 12 is connected with current to heat and control the temperature of the glass liquid flowing out, and the pipe diameter of the material leaking device 12 can be designed according to the viscosity and the discharging speed of the glass liquid.

The temperature of the molten glass is controlled by adjusting the current of the material leakage device 12, the consistency of the flow rate and the volume of the molten glass can be ensured, and the molten glass is dripped into the preform slide way 22 of the preform forming control part 2 in a self-weight dripping or shearing mode of the molten glass.

A heating temperature control system 21 and a preform slideway 22 are arranged in the cavity of the preform molding control part 2. The preform molding control part 2 adopts a sealed cavity and is provided with a vacuumizing interface and an inert gas access interface. The cavity of the preform forming control part 2 is a clean environment, preferably a thousand-level dust-free environment, so that the aim of preventing dust or other foreign matters in the air from falling can be fulfilled.

The heating temperature control system 21 adopts a radiation or heat conduction heating mode, and heating parts of the heating temperature control system are annularly and uniformly distributed around the material receiving port 221, so that the glass liquid can be uniformly heated around. The temperature control system 21 is used for controlling the temperature of the dripped preform, so that the temperature is in a suitable pressing temperature before the preform enters the precision molding press 3, and the molding temperature is designed to be 5-50 ℃ above the glass Ts. The accuracy of the temperature control system is + -2 deg.C.

The preform slide 22 below the receiving opening 221 includes an upper vertical main pipe and a lower elbow or other elongated pipe. The following part of preform slide 22 main pipeline adopts curved conduit or extension nature pipeline design, and this design can slow down the speed that the preform fell into behind the slide, plays the preform whereabouts cushioning effect, ensures that the preform passes through preform export 223 accurate the center that falls into mould 31 and does not take place to deviate, and the design of the preferred spiral return bend of design of return bend.

An inert gas inlet pipe 222 is connected from a main pipe of the preform slide 22 between the preform molding control part 2 and the precision press 3, and inert gas is introduced to suspend the glass preform, and the inert gas serves to stop the molten glass and prevent the molten glass from being oxidized by contacting air. From the viewpoint of production and manufacturing costs, N₂Easy to manufacture, low cost, and is the preferred inert gas of the invention.

The outlet direction of the inert gas inlet tube 222 is inclined upward at an angle of less than 90 ° to the preform slide 22, and is optimally designed to be 25-70 °, see fig. 2, which ensures that the gas is sprayed upward in a concentrated manner.

The inert gas introduction cutting-off action command comes from the feedback of a temperature monitoring system in the temperature control system 21, when the temperature of the monitored glass preform reaches a process set value or is delayed for 5-200 seconds according to the process design requirement, a cutting-off action command is sent, the inert gas introduction cutting-off is carried out, and the preform falls into a preform slide way 22.

The receiving opening 221 is shaped like a funnel with a large upper part and a small lower part, but not limited to a trumpet, and the main function of the shape is to ensure the accuracy of receiving the dropped glass liquid.

The precise molding press 3 is only provided with a material receiving station, a pressing station and a water cooling station in the cavity, and the preform falling into the mold 31 can be directly molded without installing a preform preheating module. The profiling station comprises more than one profiling station with gradually reduced pressure, and the water cooling station comprises more than one water cooling station. The design of the forming station of the equipment can be simplified because the preheating module is not added. The precision molding press 3 is not provided with a preform preheating module, so that the electric energy consumption is low in the production process, the fatigue damage caused by repeated temperature rise and temperature reduction of the mold is avoided, the service life is greatly prolonged, and the precision molding press is particularly suitable for high Tf (softening point) glass. The molding mode can solve the problem that the preform is easy to generate surface defects due to secondary heating, and the product smoothness is easier to achieve. Compared with the mode of heating, preheating, molding and cooling of the conventional molding press, the precise molding press 3 does not need heating and preheating, and the production and manufacturing time is greatly shortened.