Resin pipe and method for manufacturing the same, and apparatus for manufacturing the resin pipe
The resin pipe manufacturing apparatus with a mold having an interference portion addresses uneven thickness by enhancing fiber orientation and adhesion, improving strength and efficiency.
JP2025129005APending Publication Date: 2025-09-03SEKISUI CHEMICAL CO LTD
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Patent Information
- Application Number
- JP2024162196
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2024-02-22
- Filing Date
- 2024-09-19
- Publication Date
- 2025-09-03
AI Technical Summary
Technical Problem
Resin pipes with uneven thickness due to fiber orientation during extrusion molding result in reduced strength, necessitating thicker pipes to compensate, which decreases manufacturing efficiency.
Method used
A resin pipe manufacturing apparatus with a mold featuring a flow path with an interference portion that includes partitions to divide the cross-section, ensuring uniform fiber orientation and layer adhesion through irregularities in the radial direction.
Benefits of technology
The method suppresses uneven thickness, enhances strength, and maintains manufacturing efficiency by improving fiber orientation and adhesion between layers.
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Smart Images
Figure 2025129005000001_ABST
Abstract
To provide a manufacturing method for resin pipes that can suppress wall thickness variation, when significant wall thickness variation occurs in resin pipes, the strength of the pipes is partially reduced, therefore, to ensure the necessary strength of the resin pipes, it becomes necessary to increase the pipe wall thickness (thickening), and thickening requires more raw materials and may reduce manufacturing efficiency, the present invention was made in view of the above circumstances.SOLUTION: A resin tube manufacturing apparatus for producing a tube comprising a first layer containing resin and two or more fibers, and the apparatus has a mold for extruding a first resin composition constituting the first layer into a tubular shape, the die having a first flow path through which the first resin composition flows in a tubular manner, the die having an interference portion within the first flow path, the interference portion comprising one or more partitions that divide the cross-section of the first flow path at least in the circumferential direction.SELECTED DRAWING: Figure 4
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