Writing instrument member, method for manufacturing writing instrument member, and writing instrument

By integrating the wooden pen material combined with wood powder with water -soluble resin and the paper tube core sales, the problem of poor and medium -sized departure of injection forming manufacturing, and realized the efficient production of components for writing tools.

CN119384348APending Publication Date: 2025-01-28MITSUBISHI PENCIL CO LTD
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Patent Information

Application Number
CN202380046386.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Priority Date
2022-08-18
Filing Date
2023-08-17
Publication Date
2025-01-28

AI Technical Summary

Technical Problem

When using wooden pen holder material to manufacture parts for writing tools by injection molding, the core pin has poor mold release properties, resulting in the problem of deformation of the inner surface.

Method used

By installing the wooden pen material composed of wood powder and water -soluble resin as a binding material, the core sales of paper tubes are installed with a paper tube, and the effect of the paper tube layer can easily slide the core sales, thereby improving the modeling.

Benefits of technology

While realizing the wooden pen material, it has significantly improved the release of core sales, and avoids the deformation problem when core sales unplug.

✦ Generated by Eureka AI based on patent content.

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Abstract

Provided is a writing instrument member in which the releasability of a core pin is improved. According to the component for the writing instrument, a wooden penholder material composed of wood powder serving as a natural material and a binding material serving as a water-soluble resin is injected into a mold to be subjected to insert molding, the wooden penholder material and a core pin with a paper tube attached to the outer sleeve are integrated, and the core pin is demolded. Therefore, a double-layer structure with a paper tube layer (5f) on the inner layer and a wooden penholder layer (a layer of a joint part (5c), a cylindrical part (5d) and a conical part (5e)) on the outer layer is formed.
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Citation Information

Patent Citations

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