Prepreg manufacturing equipment

JP7874488B2Active Publication Date: 2026-06-16THE JAPAN STEEL WORKS LTD
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
THE JAPAN STEEL WORKS LTD
Filing Date
2022-09-16
Publication Date
2026-06-16

AI Technical Summary

Benefits of technology

【0007】 前記一実施の形態によれば、シート状繊維基材を構成する繊維の一部(例えば、シート状繊維基材がUD基材の場合、途中で切断された状態の繊維や毛羽立った状態の繊維)が、高電圧が印加される電極に接近することに起因してシート状繊維基材への樹脂粉体の付着量が低下するのを防止することができるプリプレグ製造装置を提供することができる。

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Abstract

To provide a prepreg manufacturing apparatus capable of preventing coating weight of resin powder on a sheet-like fiber base material from lowering.SOLUTION: A prepreg manufacturing apparatus manufactures a prepreg through adhering resin powder onto a sheet-like fiber base material 50. The prepreg manufacturing apparatus includes: a resin powder discharge port 33 having a slit-like shape and extending in a crosswise direction of the sheet-like fiber base material; a feed pipe 37 configured to feed, to the resin powder discharge port, air and resin powder injected from the resin powder discharge port to the sheet-like fiber base material; and an electrode 80 configured to generate an electrical field between itself and the sheet-like fiber base material by application of a high voltage. The electrode is arranged so as to overlap the resin powder discharge port in front view.SELECTED DRAWING: Figure 5
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Claims

1. A prepreg manufacturing apparatus for producing a prepreg by attaching resin powder to a sheet-like fibrous substrate, The sheet-like fibrous substrate has a slit-shaped resin powder discharge port extending in the width direction, A supply pipe that supplies air and resin powder, which are sprayed from the resin powder discharge port toward the sheet-like fibrous substrate, to the resin powder discharge port, The system comprises a rod-shaped electrode that forms an electric field between itself and the sheet-like fiber substrate when a high voltage is applied, The rod-shaped electrode has a diameter smaller than the slit width of the resin powder discharge port, extends in the width direction of the sheet-like fiber substrate, and is positioned to overlap the resin powder discharge port when viewed from the front in a prepreg manufacturing apparatus.

2. The prepreg manufacturing apparatus according to claim 1, wherein at least a portion of the electrode is provided inside the supply pipe via the resin powder discharge port.

3. The prepreg manufacturing apparatus according to claim 1, wherein the electrode is arranged in a front view within the slit width of the resin powder discharge port.

4. The prepreg manufacturing apparatus according to claim 1, wherein the rod-shaped electrode is arranged in such a manner that it overlaps with the range in the slit width direction of the resin powder discharge port where the flow velocity of the air ejected from the resin powder discharge port is fastest.

5. The prepreg manufacturing apparatus according to claim 1, wherein the electrode is a rod-shaped electrode or a plate-shaped electrode extending in the width direction of the sheet-like fiber substrate.

6. The prepreg manufacturing apparatus according to claim 1, wherein the electrode is provided with a flow straightening section for straightening the air and resin powder sprayed from the resin powder discharge port toward the sheet-like fibrous substrate.