Preparation device for injection mold and light guide plate

Abstract

The invention discloses a preparation device for an injection mold and a light guide plate. The injection mold includes a male mold and a female mold, and the male mold cooperates with the female mold to define a molding cavity suitable for forming thin plate parts. A blowing device is provided in the male mold, and the blowing device is suitable for blowing gas with a predetermined pressure to the bottom surface of the thin plate-shaped part formed in the molding cavity, so as to release the contact between the bottom surface of the thin plate-shaped part and the Vacuum suction between the bottom surfaces of the molding cavity to separate the sheet-like part from the male mold. Therefore, the thin-plate-shaped part can be demoulded smoothly, and the large warping of the thin-plate-shaped part can be effectively prevented during the demolding process, thereby ensuring the quality of the thin-plate-shaped part.

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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