TWM612135U - Manufacturing system of 3d curved glass - Google Patents

Abstract

The invention discloses a manufacturing system of 3D curved glass. The system includes: a heating cavity, a glass is placed in the heating cavity, the glass is placed on a mold, and a microwave absorbing material is arranged around the glass; a microwave power source, providing microwave power to the heating cavity to act on the glass and the microwave absorbing material. The manufacturing system of 3D curved glass of the present invention can make the glass reach the temperature required for softening quickly, thus having the effect of reducing the manufacturing process cost.

Description

3D curved glass manufacturing system

This creation is about glass manufacturing systems, and more particularly about 3D curved glass manufacturing systems that can be fast and energy-saving.

With the advancement of technology, the application of mobile phone materials has become more and more extensive. Since 2017, glass materials have been widely used. Related products such as mobile phone screens have demonstrated the technical content of glass processing. The era of soft electronics is coming, and 3D surface modeling And glass materials will become the standard configuration of mobile phones. The production process of 3D curved glass is basically the same as that of 2D and 2.5D products. The biggest difference is the new hot bending forming equipment.

When 3D glass is formed by hot bending, the glass is heated to a specific temperature to soften it, and a specific shape is used, and the mold is copied to obtain the required 3D shape glass molding process. The hot bending process is one of the core processes in the 3D glass process. The forming mold used in hot bending glass plays an important role in the forming process of hot bending glass. The types of hot bending molds are mainly divided into three types: solid molds, strip frame molds, and hollow molds. In the actual production process, different hot bending molds can be selected according to different product types. The solid mold has a solid center in the mold and is made of iron plate. The characteristic of this kind of mold is that it is easy to ensure that the curvature of the glass is consistent with the spherical surface, and the glass will not bend excessively, which does not require high operators; the disadvantage is that the production cost of the mold is high, and the production cycle is long. During the hot bending and firing process, The heat absorption of the mold causes slow heating, and it is easy to cause pitting on the glass surface during the firing process. Hollow mold adopts angle Made of steel and flat steel. The production of this kind of mold is relatively simple, the material is small, the mold absorbs less heat during the hot bending firing process, and the middle of the glass is supported by a spring during the firing process, so there will be no pitting on the surface of the product. The use of this type of mold requires high technical requirements for the hot bending operation. Due to the thermal hysteresis in the glass hot bending process, the product is easy to bend over. The frame mold is a kind of mold between the solid mold and the hollow mold. Compared with the solid mold, its production is simpler and has lower requirements for the hot bending operation.

At present, most glass processing manufacturers use electric heating bending furnaces, which are convenient for temperature control, easy to operate, and do not pollute the glass. The product quality and product consistency are high, and most of them have adopted computers. Control, through the computer to set various parameters, realize the programmed control of the hot bending process. The hot bending operation process can be simply summarized as placing the glass with well-matched large and small pieces and evenly sprinkled with silicon powder between the two large and small pieces on the concave mold, and then heating it. When the softening point temperature is reached, after the glass reaches the same curvature as the concave mold under the action of its own gravity or external pressure, the heating is stopped, and annealing is carried out slowly to room temperature to complete the hot bending process.

However, the current electric heating bending furnace needs to reach the temperature of 640~710°C required for glass forming in the furnace, which requires very high energy, and the heating process is very long. Therefore, the whole process is very energy intensive. Moreover, when the glass is close to the softening temperature, it suddenly sinks and deforms under the action of its own gravity. Sometimes the glass surface often produces hot bending waves. The operator must always observe the glass formation in the furnace to control the number of heating lamps. , Area and time, so it is very labor intensive.

In view of the above problems, it is necessary to propose a curved glass manufacturing system that saves energy and reduces manpower to solve the above problems.

The main purpose of this creation is to propose a 3D curved glass manufacturing system. The curved glass manufacturing system can make the glass reach the temperature 640~710℃ required for softening very quickly, so the whole process is very energy-saving. In addition, the curved glass manufacturing system can precisely control the temperature of the glass, thus saving manpower.

In order to achieve the main purpose of this creation, this creation provides a curved glass manufacturing system, which includes: a heating cavity, in which a glass is placed; a mold, in which the heating cavity is placed, and the glass is placed on the mold, A microwave absorbing material is arranged around the glass; a microwave power source provides microwave power to the heating cavity to act on the glass and the microwave absorbing material.

According to a feature of this creation, the frequency of the microwave power source is selected from one of 915MHz or 2450MHz.

According to a feature of this creation, the microwave power provided by the microwave power source can be adjusted.

According to one of the characteristics of this creation, the glass is covered with a batch coating layer to make the temperature of the glass uniform.

According to a feature of this creation, the curved glass manufacturing system further includes: a temperature sensor for sensing the temperature of the glass.

The 3D curved glass manufacturing system of this creation has the following functions:

1. The 3D curved glass manufacturing system can make the glass reach the temperature 640~710℃ required for softening very quickly, so the whole process is very energy-saving.

2. The 3D curved glass manufacturing system can precisely control the temperature of the glass, so it can save manpower.

3. The 3D curved glass manufacturing system requires very few facilities and no consumables to be replaced, so the cost of the manufacturing process can be reduced.

10: Curved glass manufacturing system

20: Heating chamber

30: Microwave power source

40: temperature sensor

50: glass

60: Mould

70: Microwave absorbing material

80: batch coating

In order to make the above and other purposes, features, and advantages of this creation more obvious and understandable, a few preferred embodiments are listed below in conjunction with the accompanying drawings, which are described in detail as follows.

Figure 1 is a schematic diagram of the creative 3D curved glass manufacturing system.

Although the present creation can be expressed in different forms of embodiments, the ones shown in the drawings and those described herein are the preferred embodiments of the creation. Those familiar with the art will understand that the devices and methods specifically described in this article and illustrated in the drawings are considered as examples of this creation, non-limiting illustrative embodiments, and the scope of this creation is only within the scope of the patent application. Be defined. The features illustrated or described in combination with an exemplary embodiment can be combined with features of other embodiments. These modifications and changes will be included in the scope of this creation.

Although the present creation can be expressed in different forms of embodiments, the ones shown in the drawings and those described herein are the preferred embodiments of the creation. Those familiar with the art will understand that the devices and methods specifically described in this article and illustrated in the drawings are considered as examples of this creation, non-limiting illustrative embodiments, and the scope of this creation is only within the scope of the patent application. Be defined. The features illustrated or described in combination with an exemplary embodiment can be combined with features of other embodiments. These modifications and changes will be included in the scope of this creation.

Now please refer to Figure 1, which is the creation of a curved glass manufacturing system 10, which It includes: a heating cavity 20, a mold 60 and a microwave power source 30. A glass 50 is placed in the heating cavity 20; the mold 60 is placed in the heating cavity 20, the glass 50 is placed on the mold 60, and a microwave absorbing material 70 is placed around the glass 50. The microwave power source 30 provides microwave power to the heating cavity 20 to act on the glass 50 and the microwave absorbing material 60.

The heating cavity 20 is used for microwave heating and is an electrically sealed cavity. Stainless steel is commonly used as the shell material of the heating cavity 20.

The microwave power source 30 is arranged on the heating cavity 20, and is used to provide microwave power into the heating cavity 20, so that the substance inside the heating cavity 20 reacts with the microwave power to make the substance The temperature rises. The microwave power source 30 includes a microwave high-voltage power supply, a microwave magnetron and a microwave waveguide. The microwave high-voltage power supply, the microwave magnetron and the microwave waveguide system are electrically connected to generate and output microwave power. The microwave waveguide of the microwave power source 30 is arranged on the heating cavity 20, that is, in contact with the heating cavity 20, so as to output appropriate microwave distribution. The distribution of the microwave waveguide of the microwave power source 30 in the heating cavity 20 takes into account the uniformity of the electromagnetic distribution of the microwave in the cavity. It should be noted that here, the microwave power source 30 is not limited to a set of microwave high-voltage power supplies, microwave magnetrons and microwave waveguides, but may be a combination of multiple sets of microwave high-voltage power supplies, microwave magnetrons and microwave waveguides. , It is mainly to set different sets of microwave high-voltage power supplies, microwave magnetrons and microwave waveguides according to the heating demand power and electromagnetic distribution to achieve a reasonable microwave power source 30.

The currently commonly used frequency of the microwave power source 30 is selected from one of 915 MHz or 2450 MHz. Preferably, the frequency of the microwave power source 30 is 2450 MHz. However, a frequency of 915 MHz can also be used to achieve a deeper heating depth. Furthermore, the microwave power source 30 can use multiple sets of microwave high-voltage power supplies, microwave magnetrons, and microwave waveguides to make the microwave power The source 30 has both 915 MHz and 2450 MHz frequencies.

In addition, in order to properly control the temperature of the heating process, the microwave power provided by the microwave power source 30 can be adjusted, for example, high power is used in the initial stage of heating, and low power is used in the later stage of heating.

The glass 50 is generally used for mobile phone shells or car window glass. The glass 50 is flat at the beginning, and is placed on the mold 60. The mold 60 uses a non-metallic material to form a mold having a curved shape. The material of the mold 60 is selected from oxide ceramics or carbon fiber composite materials. The material of the mold 60 includes high temperature glass, quartz, aluminum oxide, zirconium oxide, silicon oxide, magnesium oxide, calcium oxide, and mixtures thereof.

Microwave power will increase the temperature of the glass 50, but the rate of increase may not be fast enough. In order to speed up the temperature rise rate of the glass 50, a microwave absorbing material 70 is arranged around the glass 50. The microwave absorbing material 70 is selected from oxide materials, carbon black, graphite, silicon carbide or magnetic non-metallic materials. The microwave power causes the temperature of the microwave absorbing material 70 to rise rapidly. Since the microwave absorbing material 70 is placed around the glass 50, the glass 50 will receive radiant heat and increase its temperature rise rate. It should be noted that the microwave absorbing material 70 placed around the glass 50 means that it can be in contact with the glass 50 or have a distance from the glass 50, for example, a distance of 1 cm to 20 cm. The microwave absorbing material 70 can surround the glass 50, the entire glass 50 or only a part of the glass 50. When the glass 50 reaches its softening temperature, its shape changes due to gravity. Since it is placed on the mold 60, the glass 50 will form the shape of the mold 60.

It should be noted that, in order to obtain a uniform temperature distribution and increase of the glass 50, a batch coating layer 80 is covered on the glass 50 to make the temperature of the glass 50 uniform. The The batch coating layer 80 is adjacent to the glass 50, and the batch coating layer 80 may be above the glass 50 or below the glass 50. The batch of coatings 80 can be made of general high temperature resistant materials, such as glass fiber cloth or carbon fiber cloth; the batch of coatings 80 can also be microwave absorbing materials, including oxide materials, carbon black, graphite, silicon carbide or magnetic non-metallic materials.

The curved glass manufacturing system 10 further includes a temperature sensor 40 for sensing the temperature of the glass 50. It should be noted that the temperature sensor 40 is not limited to only one temperature sensor 40, and multiple temperature sensors 40 can be provided to accurately sense the temperature of the glass 50. The temperature sensor 40 uses an infrared temperature sensor or a thermocouple temperature sensor. The temperature sensor 40 senses the temperature of the glass 50; when the temperature of the glass 50 reaches the softening temperature of the glass 50, the microwave power is provided for a period of time and then the microwave power is stopped.

Although this creation has been disclosed in the foregoing preferred embodiments, it is not intended to limit this creation. Anyone who is familiar with this technique can make various changes and modifications without departing from the spirit and scope of this creation. As explained above, various types of amendments and changes can be made without destroying the spirit of this creation. Therefore, the scope of protection of this creation shall be subject to the scope of the attached patent application.

10: Curved glass manufacturing system

20: Heating chamber

30: Microwave power source

40: temperature sensor

50: glass

60: Mould

70: Microwave absorbing material

80: batch coating

Claims (10)

A 3D curved glass manufacturing system, comprising: a heating cavity in which a glass is placed; a mold in which the heating cavity is placed, the glass is placed on the mold, and a microwave absorbing material is placed around the glass; A microwave power source provides microwave power to the heating cavity to act on the glass and the microwave absorbing material. The 3D curved glass manufacturing system according to claim 1, wherein the frequency of the microwave power source is selected from one of 915 MHz or 2450 MHz. The 3D curved glass manufacturing system according to claim 1, wherein the microwave power provided by the microwave power source can be adjusted. The 3D curved glass manufacturing system according to claim 1, wherein the glass is further covered with a batch coating layer to make the temperature of the glass uniform. The 3D curved glass manufacturing system according to claim 1, further comprising: a temperature sensor for sensing the temperature of the glass. For example, the 3D curved glass manufacturing system of claim 5, wherein when the temperature sensor detects that the temperature of the glass reaches the softening temperature of the glass, the microwave power source continues to provide for a period of time and then stops the microwave power. For example, the 3D curved glass manufacturing system of claim 5, wherein the temperature sensor uses an infrared temperature sensor or a thermocouple temperature sensor. The 3D curved glass manufacturing system according to claim 1, wherein the mold uses a non-metallic material to form a mold with a curved shape. The 3D curved glass manufacturing system according to claim 1, wherein the glass is in contact with the microwave absorbing material. The 3D curved glass manufacturing system according to claim 1, wherein there is a distance between the glass and the microwave absorbing material.

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