CN205420147U - Model glass's ceramic mould - Google Patents

Abstract

The utility model discloses a model glass's ceramic mould, including last mould benevolence group (1), lower mould benevolence group (2), base (3) and locating pin (4), wherein base (3) middle part is equipped with locating hole (5), bottom and locating pin (4) assembly, and air vent (7), air vent (7) intercommunication locating hole (5), sleeve (6) and base (3) are established to the circumferencial direction, the circumferencial direction equipartition sleeve (6) of base (3), upward mould benevolence group (1), lower mould benevolence group (2) organize (1), lower mould benevolence group (2) assembly with last mould benevolence in inserting sleeve (6). The utility model provides a mould, hot response speed is fast, the precision is high, longe -lived, the location is accurate, the drawing of patterns convenient, can one shot forming multiunit glass lens, improved production efficiency and yield greatly.

Description

A ceramic mold for molding glass

technical field

The utility model belongs to the technical field of engineering ceramics and relates to a mold structure, in particular to a ceramic mold for molding glass with high precision and high efficiency.

Background technique

With the development of multimedia technology, the demand for high-pixel glass lenses is increasing. The traditional grinding process can no longer meet the needs of glass lenses, especially for aspheric micro lenses. The traditional lens processing technology cannot meet the application requirements. Demand, therefore, glass molding technology came into being. This process directly puts the softened optical glass into a high-precision mold, and under heating and pressure and a protective atmosphere, the optical parts that meet the requirements of use are directly molded at one time. The surface optical quality, precision and service life of the mold are directly related to the qualification rate and manufacturing cost of the lens.

Mold materials for molding have been developed from metal to graphite, and then to hard alloy, and the service life and processing accuracy have been improved step by step. The metal mold has low hardness, low thermal conductivity, and poor precision and service life. Graphite material has high thermal conductivity, but low strength and poor life. Cemented carbide materials have high hardness, average thermal conductivity, and poor thermal deformation ability. The mold structure has also developed from the earliest single-mode to the subsequent multi-mode, and the efficiency has been further improved. However, the multi-mode structural design puts forward higher requirements on materials, and the existing application difficulties need to be solved urgently.

Utility model content

The purpose of the utility model is to provide a ceramic mold for molding glass, so as to solve the existing difficulties in efficient processing of glass lenses.

In order to achieve the above object, the technical solution adopted by the utility model is:

A ceramic mold for molding glass, comprising an upper mold core set (1), a lower mold core set (2), a base (3) and positioning pins (4); wherein a positioning hole (5) is arranged in the middle of the base (3) ), the bottom is assembled with the positioning pin (4), and the vent hole (7) is arranged in the circumferential direction, and the vent hole (7) communicates with the positioning hole (5), the sleeve (6) and the base (3); the base (3) The sleeve (6) is evenly distributed in the circumferential direction, and the upper mold kernel group (1) and the lower mold kernel group (2) are inserted into the sleeve (6) to assemble with the upper mold kernel group (1) and the lower mold kernel group (2).

In the ceramic mould, the diameter of the air hole is 2mm; 8 sleeves (6) are evenly distributed in the circumferential direction of the base (3).

In the ceramic mould, the assembly accuracy between the sleeve (6) and the upper mold core group (1) and the lower mold core group (2) is less than 2 μm.

In the ceramic mould, the positioning hole (5) is provided with a step in the middle, and the position of the vent hole (7) is higher than the step.

In the ceramic mould, the surface roughness of each mold core in the upper mold core group (1) and the lower mold core group (2) is less than 10nm.

In the ceramic mould, the height of the positioning pin (4) is half of the base (3).

The utility model solves the key difficulties existing in the existing molded glass moulds, and brings the following beneficial effects:

(1) The mold assembly accuracy is less than 2μm, the surface roughness of the mold core is less than 10nm, and the precision is high, which greatly improves the yield of molded lenses.

(2) The mold structure design is reasonable, and multiple glass lenses can be molded at one time, which greatly improves the production efficiency of molded lenses.

Description of drawings

Fig. 1 is a three-dimensional schematic diagram of a mold of the present invention.

Fig. 2 is a schematic diagram of the front of the mold of the utility model.

Fig. 3 is a schematic cross-sectional view of the mold of the present invention (cut along the arrow in Fig. 2).

detailed description

In order to realize the technical means, creative features, goals and beneficial effects of the utility model, the following will be further described in detail in conjunction with the accompanying drawings.

As shown in FIG. 1 , a ceramic mold for molding glass includes an upper mold core set 1 , a lower mold core set 2 , a base 3 and positioning pins 4 . The middle part of the base 3 is provided with a positioning hole 5, the bottom is assembled with the positioning pin 4, and a ventilation hole 7 is arranged in the circumferential direction, and the ventilation hole 7 communicates with the positioning hole 5, the sleeve 6 and the base 3. Sleeves 6 are evenly distributed in the circumferential direction of the base 3, and are assembled with the upper mold core group 1 and the lower mold core group 2, and the assembly accuracy is less than 2 μm.

Fig. 2 is the front schematic view of the mould, the base 3 is provided with ventilation holes 7 in the circumferential direction, and the diameter of the ventilation holes is about 2mm. According to this schematic diagram, eight sleeves 6 are evenly distributed in the circumferential direction, and the number and size thereof can be determined according to actual conditions.

Fig. 3 is a schematic sectional view of the mould, a cavity 8 is formed between a single mold core and the sleeve, and glass nitrate material 9 is installed inside, and the height is adjusted by the positioning pin 4. The shape of the mold core depends on the actual situation, and the surface roughness is less than 10nm. The positioning hole 5 is provided with a step in the middle (located at the top of the positioning pin 4 in Figure 3), the height of the positioning pin 4 is about half of the base 3, and the position of the air hole 7 is slightly higher than the step to ensure that each cavity is pressed Exhaust smoothly during the process.

According to the design of the mold of the utility model, the mold can form 8 aspheric glass micro-lenses at one time, compared with the traditional hard alloy mold, the heating time is increased by more than 30%, and the temperature uniformity of the mold is better. In addition, after adopting the silicon carbide ceramic mold, the service life of the mold is increased by more than 2 times. After adopting the mold designed by the utility model, the production efficiency and yield of the lens are greatly improved. First install the lower die set, base and positioning pins in place, add glass nitrate material from each upper die set, and then install the upper die set. The set of molds is placed in a molding machine, heated and pressurized at a certain temperature, and then cooled to obtain an aspheric glass lens.

It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should belong to the protection scope of the appended claims of the present utility model.

Claims (6)

1. A ceramic mold for molded glass is characterized in that it comprises an upper mold kernel group (1), a lower mold kernel group (2), a base (3) and positioning pins (4); wherein the middle part of the base (3) A positioning hole (5) is provided, the bottom is assembled with a positioning pin (4), and a ventilation hole (7) is provided in the circumferential direction, and the ventilation hole (7) communicates with the positioning hole (5), the sleeve (6) and the base (3); The sleeve (6) is evenly distributed in the circumferential direction of the base (3), and the upper mold core group (1) and the lower mold core group (2) are inserted into the sleeve (6) to connect with the upper mold core group (1) and the lower mold core Group (2) assembly. 2. The ceramic mold according to claim 1, characterized in that, the diameter of the air hole is 2 mm; 8 sleeves (6) are evenly distributed on the circumferential direction of the base (3). 3. The ceramic mold according to claim 1, characterized in that the assembly accuracy between the sleeve (6) and the upper mold core group (1) and the lower mold core group (2) is less than 2 μm. 4. The ceramic mold according to claim 1, characterized in that, the positioning hole (5) is provided with a step in the middle, and the position of the vent hole (7) is higher than the step. 5. The ceramic mold according to claim 1, characterized in that the surface roughness of each mold core in the upper mold core group (1) and the lower mold core group (2) is less than 10 nm. 6. The ceramic mold according to claim 1, characterized in that the height of the positioning pin (4) is half of the base (3).