# US 8,540,917 B2 · Insert molding method and insert molded product

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- Number: US 8,540,917 B2
- Document ID: US8540917B2
- Status: Granted
- Kind: B2
- Application number: 12/926,639
- Filed: 2010-12-01
- Published: 2011-06-16
- Granted: 2013-09-24
- Earliest claimed: 2009-12-16
- Assignees: Hitachi Cable, Ltd.
- Applicants: Satoshi Yamamoto; Akihiro Tanba; Masafumi Kaga
- Inventors: Satoshi Yamamoto; Akihiro Tanba; Masafumi Kaga
- Web page: https://patentgrep.com/patent/US8540917B2

## CPC

- B29C 33/12: with incorporated means for positioning inserts, e.g. labels {(positioning reinforcements B29C70/541)}
- B29C 45/14065: {Positioning or centering articles in the mould}
- B29C 45/14467: {Joining articles or parts of a single article (B29C45/14377, B29C45/14385, B29C45/14581, B29C45/14614 and B29C45/006 take precedence)}
- B32B 27/34: comprising polyamides
- B32B 27/38: comprising epoxy resins
- Y10T 428/2495: Thickness [relative or absolute]
- Y10T 428/31511: Of epoxy ether
- Y10T 428/31725: Of polyamide
- B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00)
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

An insert molding method includes holding a plurality of insert members in a molding die to be separated from one another, and subsequently filling a resin into the molding die to fill a gap between the insert members and a periphery thereof with the resin to form an insert molded product such that the insert members are separated at a preset interval from one another. The molding die includes a space-maintaining projection for maintaining a separation interval between the insert members at the preset interval or more, the projection being formed on an inner wall surface of the molding die opposite to a longitudinal end of the insert members, and a gate for filling the resin therethrough into the molding die, the gate being formed on an inner wall surface of the molding die opposite to a side of the insert members in a width direction thereof.

## Claims

### Claim 1

An insert molding method, comprising:
holding a plurality of insert members in a molding die to be separated from one another; and
subsequently filling a resin into the molding die to fill a gap between the plurality of insert members and a periphery thereof with the resin to form an insert molded product such that the plurality of insert members are separated at a preset interval from one another,
wherein the molding die comprises a space-maintaining projection for maintaining a separation interval between the plurality of insert members at the preset interval or more, the projection being formed on an inner wall surface of the molding die opposite to a longitudinal end of the plurality of insert members, and a gate for filling the resin therethrough into the molding die, the gate being formed on an inner wall surface of the molding die opposite to a side of the plurality of insert members in a width direction thereof,
wherein the plurality of insert members are held in the molding die such that the separation interval is allowed to change and to be more than the preset interval while sandwiching the projection,
wherein the resin is filled through the gate into the gap between the plurality of insert members such that the resin subsequently penetrates into an inner rim portion of the molding die, and the end of the plurality of insert members is pressed against the projection by resin pressure of the penetrating resin to form the insert molded product; and
wherein the molding die further comprises a push bar to be inserted into the molding die to contact the plurality of insert members, and
the push bar is pushed in so as to supplement the resin pressure for reducing the gap between the plurality of insert members when the resin penetrates into the inner rim portion of the molding die.

### Claim 2 (depends on 1)

The insert molding method according to claim 1, wherein the molding die further comprises a wide holding groove for holding the plurality of insert members on the inner wall surface, and
the projection is formed near a center of a bottom of the holding groove.

### Claim 3 (depends on 1)

The insert molding method according to claim 1, wherein the molding die further comprises a supporting member to contact the plurality of insert members along a length direction thereof while being inserted into the molding die, and
the supporting member is separated from the plurality of insert members and does not disturb the penetration of the resin when the resin penetrates into the inner rim portion of the molding die.

### Claim 4 (depends on 1)

The insert molding method according to claim 1, wherein the molding die further comprises an approach preventing means to prevent an interval between the plurality of insert members along a length direction thereof from being less than the preset interval.