Manufacturing method for molded article

Patent metadata

Field	Value
Publication number	US-12589540-B2
Application number	US-202418631248-A
Country	US
Kind code	B2
Filing date	Apr 10, 2024
Priority date	Jun 16, 2023
Publication date	Mar 31, 2026
Grant date	Mar 31, 2026

Abstract

A manufacturing method for a molded article is provided, including: a preparing step of preparing an insert member having, on a surface, a first resin part containing a first thermoplastic resin; a filling step of inserting and fixing the first resin part of the insert member into a mold and filling a space between the first resin part and the mold with a molten second thermoplastic resin using an injection molding apparatus; and a pressure holding step of applying a holding pressure to the second thermoplastic resin that the space is filled with, wherein in the pressure holding step, a first holding pressure is applied until an inner temperature of the first resin part reaches a deflection temperature under load of the first thermoplastic resin, and a second holding pressure lower than the first holding pressure is applied after the inner temperature reaches the deflection temperature under load.

First claim

What is claimed is:

1 . A manufacturing method for a molded article, comprising:
a preparing step of preparing an insert member having, on a surface, a first resin part containing a first thermoplastic resin; a filling step of inserting and fixing the first resin part of the insert member into a mold and filling a space between the first resin part and the mold with a molten second thermoplastic resin using an injection molding apparatus; and a pressure holding step of applying a holding pressure to the second thermoplastic resin that the space is filled with, wherein in the pressure holding step, a first holding pressure is applied until an inner temperature of the first resin part reaches a deflection temperature under load of the first thermoplastic resin, and a second holding pressure lower than the first holding pressure is applied after the inner temperature reaches the deflection temperature under load.

2 . The manufacturing method for a molded article according to claim 1 , wherein:
each of the first thermoplastic resin and the second thermoplastic resin is polyolefin; the first holding pressure is not less than 1.5 MPa; and the second holding pressure is less than 1.5 MPa.

3 . The manufacturing method for a molded article according to claim 1 , wherein:
the molded article is a member used for a power storage module; the insert member has
an electrode body having a plurality of electrodes stacked in a thickness direction, and
a resin-made seal part arranged along an outer edge of the electrode body;
each electrode has
a current collector body, and
an active material layer; and
the seal part is the first resin part.

4 . The manufacturing method for a molded article according to claim 3 , wherein the electrode body has a bipolar electrode as the electrode.

Assignees

• Toyota Motor Co Ltd

Inventors

• Sugihara Atsushi
• Kishimoto Shun
• Ito Taichi
• Asai Shinya
• Yamashita Tatsuya

Classifications

• B29C45/14 Primary

  incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles {(B29C45/1671 takes precedence)} · CPC title

• B29C45/1671

  with an insert · CPC title

• B29L2031/3468

  Batteries, accumulators or fuel cells (battery cases B29L2031/7146) · CPC title

• B29L2031/26

  Sealing devices, e.g. packaging for pistons or pipe joints · CPC title

• B29K2023/00

  Use of polyalkenes {or derivatives thereof} as moulding material · CPC title