# US 11,444,519 B2 · Resin molding method

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- Number: US 11,444,519 B2
- Document ID: US11444519B2
- Status: Granted
- Kind: B2
- Application number: 16/566,388
- Filed: 2019-09-10
- Published: 2020-03-26
- Granted: 2022-09-13
- Earliest claimed: 2018-09-20
- Assignees: Toyota Jidosha Kabushiki Kaisha
- Applicants: Toyota Jidosha Kabushiki Kaisha
- Inventors: Akihide Shimmei; Yoshiaki Tokunaga
- Web page: https://patentgrep.com/patent/US11444519B2

## CPC

- B29C 39/10: incorporating preformed parts or layers, e.g. casting around inserts or for coating articles {(coating a surface by casting in general B05D1/30, B29C39/126 takes precedence)}
- H02K 15/12: Impregnating, moulding insulation, heating or drying of windings, stators, rotors or machines
- B29C 35/0272: {using lost heating elements, i.e. heating means incorporated and remaining in the formed article (for preforms with internal stresses B29C61/0625; joining using lost heating elements B29C65/34; making electrically conductive articles B29C70/882)}
- B29C 39/38: Heating or cooling
- B29C 45/14639: {for obtaining an insulating effect, e.g. for electrical components}
- B29C 45/7207: {of the moulded articles}
- H02K 3/38: around winding heads, equalising connectors, or connections thereto
- H02K 3/50: Fastening of winding heads, equalising connectors, or connections thereto
- H02K 15/105: {to the windings}
- H02K 15/32: Manufacture of terminal arrangements; Connecting the terminals to external circuits
- B29C 39/006: {Monomers or prepolymers (by reaction injection moulding B29C67/246)}
- B29C 2035/0211: {resistance heating (B29C2035/0811 takes precedence)}
- B29K 2101/10: Thermosetting resins
- B29L 2031/34: Electrical apparatus, e.g. sparking plugs or parts thereof
- B29L 2031/7498: {Rotors (with blades B29L2031/08)}
- 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)
- H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53})
- B29K: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR {MOULDS, } REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29L: INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES

## Abstract

A resin molding method includes a first step of supplying electricity to and heating a stator coil via a stator terminal in a state that the stator terminal clamped; and a second step of molding an insulating resin at a coil end of the heated stator coil. The first step places the stator terminal on a conducting terminal block in such a state that clamping of the stator terminal by the conducting terminal block and a terminal holding member is released, before supplying electricity to the stator coil, and lifts up and down the conducting terminal block, such that the portion of the stator terminal becomes within a predetermined range.

## Claims

### Claim 1

A resin molding method of molding an insulating resin to cover a coil end of a stator coil that is mounted to a stator core, the resin molding method comprising:
a first step of supplying electricity to and heating the stator coil via a stator terminal in a state that the stator terminal is clamped, by using a conducting terminal block configured to be electrically conducted and to be lifted up and down and provided to mount thereon the stator terminal that is connected with the stator coil and that is placed outside of the stator core, as well as a terminal holding member configured to be lifted up and down and to work in combination with the conducting terminal block to clamp the stator terminal; and
a second step of covering the coil end of the heated stator coil with the insulating resin, while molding the insulating resin, wherein
the first step places the stator terminal on the conducting terminal block in such a state that clamping of the stator terminal by the conducting terminal block and the terminal holding member is released, before supplying electricity to and heating the stator coil via the stator terminal in the state that the stator terminal is clamped, and moves the conducting terminal block either upward or downward, such that position of the stator terminal becomes within a predetermined range.

### Claim 2 (depends on 1)

The resin molding method according to claim 1,
wherein the first step lifts up and down the conducting terminal block, such that the position of the stator terminal detected by a position detector configured to detect the position of the stator terminal becomes within the predetermined range.

### Claim 3 (depends on 1)

The resin molding method according to claim 1,
wherein the first step uses a moving amount of the stator terminal when the stator terminal is clamped by the terminal holding member and the conducting terminal block, to lift up and down the conducting terminal block, such that the position of the stator terminal becomes within the predetermined range.