Sumitomo Wiring Systems, Limited

Sumitomo Electric Industries, Limited

Autonetworks Technologies, Limited

Sumitomo Wiring, Ltd.

Shinsuke Tsutsui

Yasunori Wada

Hikaru Ito

Hajime Kawase

Osamu Sasai

Seiichi Kurosawa

Osamu Taniuchi

Seiji Takahashi

Takanori Itou

Yumiko Muramoto

Naoya Hattori

Toshiya Muraki

Provided is a multiphase converter having a plurality of voltage conversion units, and is configured to protect the faulty phase and continue driving using another phase when an abnormality occurs in any phase. A DC-DC converter includes a plurality of voltage conversion units that are in parallel between an input-side conductive path and an output-side conductive path. A control unit subjects the plurality of voltage conversion units to a test operation in which a duty ratio of a PWM signal for each voltage conversion unit is changed. The control unit identifies an abnormal voltage conversion unit based on at least one of the states of the electric current, the voltage, and the temperature of the multiphase conversion unit during this test period, and causes the remaining voltage conversion unit other than the identified abnormal voltage conversion unit to perform voltage conversion.

Multiphase converter

A fixed mold () has engaging pins () projecting towards a movable mold (). Each engaging pin () includes a shaft (A) and a large-diameter portion (C) formed at the leading end of the shaft (A). The large-diameter portions (C) of the engaging pins () interfere with the bottom surfaces of recesses () of an ejector plate () in the process of separating the movable mold (). Thus, the ejector plate () is moved forward relative to the movable mold () and leading ends of ejector pins () project from the movable mold ().

Mold for injection molding and a method of operating a mold

A movable mold is movable toward and away from a fixed mold so as to close and open the mold. The fixed mold includes an intermediate plate facing a movable-side mold plate. This intermediate plate has a retainer-molding recess which cooperates with the movable-side mold plate to form a retainer-molding cavity, and a core pin, which cooperates with a housing-molding recess to form a housing-molding cavity, is mounted on the intermediate plate. A retainer, molded in the molding cavity, is moved downward by an ejector pin into a position where the retainer is disposed coaxial with a housing. Then, the two molds are again closed together, so that the housing and the retainer are connected together, and then this assembled product is taken out.

Mold for producing resin-molded product

A connector is provided that retains a terminal fitting when a retainer is attached to a connector housing from the side. The connector housing has a cavity into which a terminal fitting is inserted and a retainer insertion hole. The retainer is attached to the connector housing from the side through the retainer insertion hole. The retainer insertion hole extends entirely through the connector housing and penetrates from opposing outer side walls of the connector housing. The retainer is displaced between a provisional engaging position and a complete engagement position in which the terminal fitting is locked. The retainer preferably has a same height as the height between the opposing outer side walls.

Connector manufacturing method and metal mold therefor

Under the condition that the stationary metallic mold and the movable metallic mold are closed, the housing is molded into a shape having the retainer insertion hole by the existence of the sliding mold. At same time, a retainer is also molded in the below portion. First, when only the rear metallic mold is opened, the core pin is withdrawn, and at the same time the sliding mold is withdrawn along the advancing and withdrawing passage in the longitudinal direction by the cam action of the angular pin, so that the molding portion is withdrawn from the retainer insertion hole. Successively, when the metallic mold is opened, the sliding mold is relatively drawn out to the front of the advancing and withdrawing passage together with the stationary metallic mold, and the advancing and withdrawing passage becomes open. Next, the auxiliary sliding mold is advanced, and the retainer held by the auxiliary sliding mold is inserted into the retainer insertion hole and temporarily assembled to the housing. Since the entire width of the retainer is supported by the auxiliary sliding mold, it is possible to insert the retainer straight into the retainer insertion hole. The finished product is protruded to the front of the movable metallic mold by the protruding pin.

Metallic mold for manufacturing a connector

A moving mold 100 consisting of slidable housing molds 110 and 110 and retainer molds 120 and 120 and a fixed mold 200 pairing with the moving mold 100 are used to mold a housing 20 and retainers 30a and 30b in resin at the same time. When the fixed mold 200 and the moving mold 100 are opened, the housing molds 110 and 110 are opened and a space is formed between the housing 20 and the retainers 30a and 30b to be fitted to each other. The retainers 30a and 30b are pressed against the housing 20 with the retainers 30a and 30b held in the retainer molds 120 and 120 from both the left and right sides, whereby the housing 20 and the retainers 30a and 30b are assembled.

Manufacturing method of resin molded assembly

Method of producing resin-molded product

When a stationary metallic mold and a movable metallic mold are closed, a housing is molded having a retainer insertion hole by the existence of a sliding mold. A retainer is also molded. First, when only the metallic mold is opened, the core pin is withdrawn, and the sliding mold is withdrawn in the longitudinal direction by the cam action of the angular pin, so that the molding portion is withdrawn from the retainer insertion hole. Successively, the sliding mold is relatively drawn out to the front of the advancing and withdrawing passage together with the stationary metallic mold, and the advancing and withdrawing passage becomes open. Next, an auxiliary sliding mold is advanced, and the retainer held by the auxiliary sliding mold is inserted into the retainer insertion hole and temporarily assembled to the housing. It is possible to insert the retainer straight into the retainer insertion hole. The finished product is protruded to the front of the movable metallic mold by the protruding pin.

Connector manufacturing method

Manufacturing metal mold for assembling a resin molded assembly

A connector assembly includes a connector housing and a retainer that straddles the connector housing. The retainer is attached on the upper face of the connector housing. The retainer includes engagement projections, which engage with terminal pieces in the connector housing, to prevent the retainer from slipping out of the connector housing. The dimensions of the connector are set so a gap is formed between the engagement projections and the outer face of the connector housing. A separation plate of a molding die can be positioned in the gap, so the connector housing and the retainer can be simultaneously molded in an assembled relationship with the retainer separated from the connector housing. A molding die and method of producing the connector assembly are also disclosed.

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Yokkaichi, Japan

Shinsuke Tsutsui