TWI640486B - Glass forming mold - Google Patents

Abstract

A glass forming mold includes an upper mold and a lower mold. The upper mold includes a molding structure. The lower mold includes a forming groove and a plurality of vacuum holes. The shape of the molding groove corresponds to the shape of the molding structure. A vacuum hole is disposed in the molding groove, and the vacuum hole is disposed through the lower mold.

Description

Glass forming mold and forming method

A glass forming mold, particularly a glass forming mold that uses vacuum and can be stacked in two layers.

Glass is one of the materials widely used in various fields, often as a transparent protective structure, such as windows, windshields, or screens of electronic devices. Especially the rapid development of mobile devices in recent years, the touch screen is almost the basic equipment for mobile devices. However, the glass required for the touch screen of a mobile device is directly related to the user's operating feel, and must be precisely matched with the mobile device, and the thickness is relatively thin. The glass required for mobile devices is more demanding in terms of molding technology.

The conventional molding method is a high-temperature pressure molding method, which uses high-temperature heating to soften the glass and presses through the upper mold and the lower mold. Although this method can complete glass molding, a set of modules corresponding to the upper and lower shapes is required, which requires more cost for mold opening. And the molding temperature must be accurately controlled, otherwise the glass will easily stick to the mold and cannot be demolded. In addition, after the conventional molding method is completed, the finished product needs to be completed by cutting and die-cutting procedures, but the cutting process is the most prone to defects, which greatly affects the overall yield. In summary, how to improve the quality and yield of glass molding is that those with ordinary knowledge in the field are worth considering.

In view of the above problems, the present invention provides a glass forming mold, which uses vacuum forming, and can improve production efficiency through a stacked design.

The invention provides a glass forming mold, which comprises an upper mold and a lower mold. The upper mold includes a molding structure. The lower mold includes a forming groove and a plurality of vacuum holes. The shape of the molding groove corresponds to the shape of the molding structure. A vacuum hole is disposed in the molding groove, and the vacuum hole is disposed through the lower mold.

In the above glass forming mold, the lower mold further includes a plurality of slide rail grooves.

In the above glass forming mold, the lower mold further includes a stacking groove, and the upper mold further includes a stacking structure, and the shape of the stacking groove corresponds to the shape of the stacking structure.

In the above glass forming mold, a material of the glass forming mold is a porous material.

In the above glass forming mold, the vacuum hole is disposed at the center and the edge of the forming groove.

The present invention also provides a glass forming method, including: S10: providing a glass forming mold and a blank glass described in item 1 of the scope of application for patents; S20: placing the blank glass on the forming groove of the lower mold; S30: heating the lower mold and the blank glass; S40: providing vacuum suction from below the lower mold; S50: closing the upper mold with the lower mold; S60: separating the upper mold from the lower mold; S70: cooling The glass forming mold and the blank glass; S80: The glass forming method described above is taken out of the blank glass, wherein steps S40 to S70 are performed repeatedly.

The glass forming method described above is performed in a glass forming furnace.

10, 20‧‧‧ glass forming mold

100‧‧‧The first mold group

110‧‧‧ lower mold, first lower mold

111, 211‧‧‧forming groove

112‧‧‧Slide rail groove

113, 213‧‧‧Vacuum holes

120‧‧‧ Upper mold, first upper mold

121, 221‧‧‧ shaped structure

122‧‧‧ stacked structure

200‧‧‧The second mold group

210‧‧‧ The second mold

212‧‧‧stacking groove

220‧‧‧The second upper mold

S10 ~ S80‧‧‧step

FIG. 1A and FIG. 1B are glass molds of the present invention.

2A and 2B illustrate an embodiment of a glass forming mold stack.

FIG. 3A and FIG. 3B are schematic diagrams of glass forming mold stacking.

4A to 4F show the glass forming method of the present invention.

Please refer to FIG. 1A and FIG. 1B, FIG. 1A and FIG. 1B are glass forming molds of the present invention. The glass forming mold 10 is suitable for forming the blank glass into a shape corresponding to the glass forming mold 10 by means such as heating and negative pressure. The glass forming mold 10 includes a lower mold 110 and an upper mold 120.

The lower mold 110 is a base of the glass forming mold 10 and is suitable for carrying rough glass. The lower mold 110 further includes a forming groove 111 and a plurality of vacuum holes 113. The shape of the molding groove 111 is the shape after the glass is formed. The vacuum hole 113 is disposed at the bottom of the molding groove 111 and is disposed at the edge and the center of the molding groove 111 respectively. The vacuum hole 113 is provided through the entire lower mold 110. The vacuum hole 113 is adapted to respond to the vacuum provided by the glass forming furnace under the lower mold 110. In some embodiments, the lower mold 110 further includes a plurality of slide rail grooves 112. The slide rail grooves 112 are disposed at the bottom of the lower mold 110, and the shape of the slide rail grooves 112 corresponds to the shape of the glass forming furnace slide rails. The design of the slide rail groove 112 makes it easier for the glass forming mold 10 to move in the glass forming furnace.

The upper mold 120 includes a molding structure 121, and the molding structure 121 is disposed at the bottom of the upper mold 120, that is, the joint between the upper mold 120 and the lower mold 110. The shapes of the forming structure 121 of the upper mold 120 and the forming groove 111 of the lower mold 110 are corresponding. That is, when the upper mold 120 and the lower mold 110 are joined, the molding structure 121 of the upper mold 120 and the molding groove 111 of the lower mold 110 can be closed.

In addition, in the preferred embodiment, the glass forming mold 10 is made of a porous material, that is, in addition to the vacuum holes 113, the vacuum attraction force can also pass through the glass forming mold 10 itself, thereby affecting the rough glass 30. The green glass 30 is molded.

In some embodiments, the upper mold 120 further includes at least one positioning structure, and the lower mold 110 further includes a positioning hole. The number and shape of the positioning structure and the positioning hole are corresponding. The positioning structure is a circular vertebral column shape. When the upper mold 120 and the lower mold 110 are closed, the positioning structure will be inserted into the positioning hole. Position for mold clamping.

In some embodiments, the upper mold 120 includes a stacked structure 122. The stacked structure 122 is disposed on the top of the upper mold 120 and is a large-area raised structure. The lower mold 110 further includes a stacking groove 212, and the shape of the stacking groove 212 corresponds to the stacking structure 122. In other words, another glass forming mold 10 can be stacked above the glass forming mold 10, and multiple pieces of blank glass can be processed at one time during the molding process, thereby improving the molding efficiency.

Please refer to FIG. 2A and FIG. 2B. FIG. 2A and FIG. 2B illustrate an embodiment of a glass forming mold stack. In this embodiment, the glass and glass forming mold 20 includes a first mold group 100 and a second mold group 200, and the first mold group 100 and the second mold group 200 are equivalent to the glass molding mold 10 of the foregoing embodiment. In this embodiment, the second mold group 200 is stacked above the first mold group 100.

The first mold set includes a first lower mold 110 and a first upper mold 120. The first lower mold 110 includes a molding groove 111, a plurality of slide rail grooves 112, and a plurality of vacuum holes 113. The vacuum holes 113 are disposed at the bottom of the forming groove 111 and are respectively disposed at the edges and the center of the forming groove 111. The vacuum hole 113 is provided through the entire first lower mold 110. The slide rail groove 112 is provided at the bottom of the lower mold 110, and the shape of the slide rail groove 112 corresponds to the shape of the slide rail of the glass forming furnace. The design of the slide rail groove 112 can make the glass forming mold 20 easier to be placed in the glass forming furnace. mobile.

The first upper mold 120 includes a molding structure 121 and a stacked structure 122. The molding structure 121 is disposed at the bottom of the upper mold 120, that is, the joint between the upper mold 120 and the lower mold 110. The shapes of the forming structure 121 of the first upper mold 120 and the forming groove 111 of the first lower mold 110 correspond to each other, and the two can be clamped to each other. The stacked structure 122 is disposed on the top of the upper mold 120.

The second mold set 200 includes a second lower mold 210 and a second upper mold 220. The second lower mold 210 includes a molding groove 211 and a plurality of vacuum holes 213. The second upper mold 220 includes a molding structure 221. The molding groove 211, the vacuum hole 213, and the molding structure 221 have the same effects as those of the first mold group 100, so they will not be repeated here. The second lower mold 210 further includes a stacking groove 212. The shape of the stacking groove 212 corresponds to the stacking structure 122 of the first upper mold 120. The stacking groove 212 and the stacking structure 122 can be combined, so the second The mold set 200 may be stacked above the first mold set 100.

Please refer to FIG. 3A and FIG. 3B. FIG. 3A and FIG. 3B are schematic diagrams of glass molding mold stacking. The glass forming mold 20 includes a first lower mold 110, a first upper mold 120, a second lower mold 210, and a second upper mold 220, which are arranged from bottom to top, with the first lower mold 110 at the bottom and the second upper mold 220 at the bottom. Up. During stacking, the molding groove 111 is combined with the molding structure 121; the stacking structure 122 is combined with the stacking groove 212; the molding groove 211 is combined with the molding structure 221. After stacking, as shown in FIG. 3B, the first lower mold 110, the first upper mold 120, the second lower mold 210 and the second upper mold 220 are stacked into a glass forming mold 20.

Please refer to FIGS. 4A to 4F. FIGS. 4A to 4F show the glass forming method of the present invention. First, a blank glass 30 and a glass forming mold 100 are provided (step S10, as shown in FIG. 4A). Next, the blank glass 30 is placed on the forming groove 111 of the lower mold 110 (step S20, as shown in FIG. 4B). Thereafter, the blank glass 30 and the lower mold 110 are heated (step S30, as shown in FIG. 4C). In a preferred embodiment, the blank glass 30 and the lower mold 110 are heated to 650 to 850 degrees Celsius.

Then, a vacuum suction force is provided from below the lower mold 110, and the vacuum suction force affects the blank glass 30 through the vacuum hole 113 (step S40), and the upper mold 120 and the lower mold 110 are closed (step S50, as shown in FIG. 4D). The heated blank glass 30 will soften, and then will be shaped into a shape corresponding to the molding groove 111 of the lower mold 120 by the vacuum suction force from the lower side and the pressure from the upper mold 120 from the upper side. In a preferred embodiment, in order to ensure that the blank glass 30 can be correctly formed, steps S40 and S50 are repeated several times.

Next, the upper mold 120 and the lower mold 110 are separated (step S60, as shown in FIG. 4E), and then the blank glass 30 and the lower mold 110 are cooled (step S70), so that the temperature of the blank glass 30 and the lower mold 110 is reduced. To room temperature. Then, the blank glass 30 is taken out (step S80). In some embodiments, a positive pressure may be provided from below the lower mold 110 to separate the blank glass 30 from the lower mold 110. The removed blank glass 30 is formed, and other processing procedures can be performed thereafter. In addition, in this embodiment, steps S10 to S80 are performed in a glass forming furnace.

The present invention has been explained as above, but it is not intended to limit the scope of the patent rights claimed in this creation. The scope of its patent protection shall depend on the scope of the attached patent application and its equivalent fields. Anyone with ordinary knowledge in the field, without departing from the spirit or scope of this patent, makes changes or retouches that are equivalent changes or designs made under the spirit disclosed in this creation, and should be included in the scope of patent application described below Inside.

Claims (7)

A glass molding mold includes: an upper mold including a molding structure and a stacked structure, the stacked structure being disposed on the top of the upper mold; and a lower mold including: a molding groove, the shape of the molding groove and the The shape of the molding structure corresponds; a plurality of vacuum holes are provided in the molding groove, and the vacuum holes are provided through the lower mold; and a stacking groove is provided at the bottom of the lower mold, the stacking groove The shape corresponds to the shape of the stacked structure. The glass forming mold according to item 1 of the patent application scope, wherein the lower mold further includes a plurality of slide grooves. The glass forming mold according to item 1 of the scope of patent application, wherein the material of the glass forming mold is a porous material. The glass forming mold according to item 1 of the patent application scope, wherein the vacuum hole is disposed at the center and edge of the forming groove. A glass forming method includes: S10: providing a glass forming mold and a blank glass described in item 1 of the scope of patent application; S20: placing the blank glass on the forming groove of the lower mold; S30: placing the blank glass The lower mold is heated with the blank glass; S40: vacuum suction is provided from below the lower mold; S50: the upper mold is closed with the lower mold; S60: the upper mold is separated from the lower mold; S70: cooling the glass forming mold And the blank glass; S80: take out the blank glass. The glass forming method according to item 5 of the scope of patent application, wherein steps S40 to S70 are performed repeatedly. The glass forming method described in item 5 of the scope of patent application is performed in a glass forming furnace.