Injection mold and light guide plate manufacturing device

Abstract

The invention discloses an injection mold and a light guide plate manufacturing device. The injection mold comprises a male mold and a female mold which are matched with each other to limit a molding cavity applicable to forming of sheet-like parts. A blowing device arranged in the male mold is applicable to blowing air with preset pressure to bottom surfaces of the sheet-like parts in the molding cavity to release vacuum adsorption between the bottom surfaces of the sheet-like parts and the bottom surface of the molding cavity so as to achieve separation between the sheet-like parts and the male mold. Therefore, the sheet-like parts can be stripped smoothly, severe warping of the sheet-like parts during stripping can be avoided effectively, and quality of the sheet-like parts is guaranteed.

Description

technical field [0001] The invention relates to the field of mechanical manufacturing, in particular to an injection mold suitable for forming a thin plate-shaped part and a preparation device for a light guide plate. Background technique [0002] figure 1 A conventional injection mold for molding the light guide plate 30 is shown; figure 2 show figure 1 The partial enlarged schematic diagram of the thimble in . [0003] Such as figure 1 and figure 2 As shown, the injection mold for molding the light guide plate 30 generally includes a male mold 10 and a female mold 20 matched with the male mold 10 . After forming the light guide plate 30 with an injection mold, it is necessary to separate the light guide plate 30 from the male mold 10 . In the existing technology, such as figure 1 and figure 2 As shown, the light guide plate 30 is usually separated from the male mold 10 by directly pushing the thimble 17 . Since the light guide plate 30 has high optical requirem...

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Problems solved by technology

[0004] However, in the prior art, such as figure 1 and figure 2 As shown, before the light guide plate 30 is pushed out, the space between the light guide plate 30 and the mold core 15 of the male mold 10 is close to a vacuum state, and there is a strong adsorption force between the two. When the light plate 30 is connected to the runner gate 31, it will cause the light guide plate 30 to warp and cannot be restored to a flat state, which reduces the quality of the light guide plate 30

In addition, when the adsorption force between the light guide plate 30 and the mold core 15 of the male mold 10 is too large, the runner gate part 31 will be broken under the pushing of the ejector pin 17. If the light plate 30 is disconnected, the light guide plate 30 cannot be ejected from the male mold 10 through the thimble 17. At this time, the light guide plate 30 cannot be demolded normally, and it needs to be shut down for processing, which affects normal production

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