Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – To produce composite – plural part or multilayered article
Reexamination Certificate
2002-05-28
2004-01-13
Ortiz, Angela (Department: 1752)
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
To produce composite, plural part or multilayered article
C264S272110, C264S272150, C264S277000, C029S883000
Reexamination Certificate
active
06676875
ABSTRACT:
TECHNICAL FIELD
The present invention relates to an insert molding method of a receptacle connector.
BACKGROUND ART
There is a receptacle connector (a female type connector) having a terminal
21
formed in a tulip shape in a side elevational view in which a curved portion
21
a
curving in a thickness direction thereof is formed, as shown in FIG.
6
(
a
), for the purpose of gripping a plug connector (a male type connector) connected thereto.
In the case of forming the receptacle connector provided with the terminal in which the curved portion is formed in accordance with an insert molding method, it is necessary to form a metal mold with keeping clear of the curved portion of the terminal.
In the case of a connector having one row of terminal group in which a plurality of terminals are provided in parallel in a width direction, it is possible to easily execute the insert molding by forming a pair of metal molds
22
so as to run off the curved portion
21
a
, as shown in FIG.
6
(
a
).
Further, as disclosed in Japanese Patent Publication No. 8-415 filed by the inventor of the present application, even in the case that the terminal group is constituted by two rows of connectors, the insert molding can be executed. In particular, as shown in FIG.
6
(
b
), the insert molding is executed by forming a metal mold core
23
placed in a side of the curved portion
21
a
so as to run off the curves portion
21
a
in the terminal group, bringing the metal mold members
22
to which the terminal group
21
is attached into contact from both sides of the core
23
so as to form a cavity
24
, and injecting a resin within the cavity
24
so as to form a mold portion
25
.
Thereafter, as shown in FIG.
6
(
c
), the insert molding of the receptacle connector in which the terminal group is constituted by two rows of terminals is excuted, by drawing out the connector from the core
23
within an elastic limit of the curved portion
21
a
in the terminal group
21
.
On the contrary, in recent years, a connector provided with a lot of terminal groups is required, and a connector provided with three or more rows of terminal groups is also desired. However, in the case that the terminal groups having the curved portions are provided in three rows or more, there are generated two or more portions in which the curved portions are overlapped and an interval thereof is made narrow, so that it is impossible to form in accordance with the conventional insert molding method.
Accordingly, in conventional, in the case of forming the receptacle connector provided with three or more rows of terminal groups, the formation is executed by insert molding one row of terminal group so as to form a mold portion, and thereafter combining them in three rows or more rows so as to adhere in accordance with an adhesive agent or an ultrasonic welding, or pressure inserting the mold portion combined in three or more rows into an independently formed case.
However, in the connector formed in accordance with the method mentioned above, there is a case that distances between the terminal groups are dispersed in some adhering states between the respective mold portions. Since a transmission impedance of the connector is dispersed when the distances between the terminal groups are dispersed, there is a risk that a transmission loss of a signal is increased particularly in the case of the connector for transmitting the signal having a high frequency.
Further, in accordance with the method mentioned above, since it is necessary to once execute the insert molding and thereafter combine the connector in three or more rows so as to fix, there is a disadvantage that a manufacturing step becomes complex.
An object of the present invention is to improve an insert molding method of a receptacle connector, and more particularly to provide an insert molding method of a receptacle connector which can keep a distance between terminals constant and can easily manufacture, even in the receptacle connector having three or more rows of terminal groups, for the purpose of solving the disadvantage mentioned above.
DISCLOSURE OF THE INVENTION
In order to achieve the object mentioned above, the present invention is an insert molding method of a receptacle connector having a terminal group in which a plurality of terminals having tulip-shaped curved portions in a side view are provided in a width direction in a front end of a flat plate portion, and a mold portion which is provided with at least three rows of the terminal groups in a thickness direction in parallel and is integrally formed with a part of the flat plate portion, characterized by the following matters.
At first, a cavity for forming the mold portion is structured such as to be formed by being surrounded by a pair of metal mold bodies formed so as to move close to and apart from each other in a thickness direction of the terminal groups, having first receiving potions for receiving the curved portion and forming a side surface of the cavity, a plurality of front cores arranged between the terminal groups, having second receiving portions formed so that the curved portion can deflect in the thickness direction, formed so as to freely move close to a front portion of the terminal and apart therefrom and forming a front surface of the cavity, and a plurality of rear cores arranged between the terminal groups at the back of the front cores and forming a rear surface of the cavity. Further, the receptacle connector is formed in accordance with the following steps.
At first, there is provided a step of receiving the curved portions in the first receiving portion so as to hold the terminals arranged at both ends, among the terminal groups arranged in three rows or more in parallel, in the pair of metal mold body, and respectively gripping flat plate portions of the terminal groups arranged at middle positions by a plurality of rear cores.
Next, there is provided a step of moving forward the front cores arranged in one side in the thickness direction of the curved portion from front portions of the curved portions so as to deflect the curved portions of the terminal groups, receiving the curved portions in the second receiving portion, thereafter moving forward the front cores arranged in another side in the thickness direction of the curved portion from front portions of the curved portions so as to deflect the curved portions of the terminal groups, and receiving the curved portions in the second receiving portion.
There are provided a step of thereafter moving a pair of metal mold bodies close to each other so as to form the cavity, a step of injecting a resin within the cavity so as to cure the resin, thereby forming the mold portion, and a step of moving a pair of metal mold bodies apart from each other.
Next, there is provided a step of moving backward the front cores arranged in one side in the thickness direction of the curved portion so as to remove while deflecting the curved portions and thereafter moving backward the front cores arranged in another side so as to remove while deflecting the curved portion.
Further, there is provided a step of removing the terminal group and the mold portion from the rear cores.
In accordance with the insert molding method of the receptacle connector of the present invention, among the terminal groups arranged in three or more rows in parallel, the terminal groups arranged at the middle position are gripped by the rear cores, and the front cores are moved forward one side by one side toward the gripped terminal groups with respect to the terminal groups.
When moving forward the front cores in one side toward the terminal groups, the curved portion is pressed to the front cores from one direction, so that the terminal groups are deflected.
Further, when moving forward the front cores in one side, the curved portions are received in the second receiving portion provided in the front cores. Next, when moving forward the front cores in another side toward the terminal groups, the curved portions are pressed to the front cores from another side.
At t
Guss Paul A.
Moldec Co., Ltd.
Ortiz Angela
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