Plastic article or earthenware shaping or treating: apparatus – Preform assembly means and means for bonding of plural... – Means press fitting or forcibly embedding one preform into...
Reexamination Certificate
1999-02-09
2001-03-27
Pyon, Harold (Department: 1722)
Plastic article or earthenware shaping or treating: apparatus
Preform assembly means and means for bonding of plural...
Means press fitting or forcibly embedding one preform into...
C425S317000, C425S556000, C425S572000, C425S577000, C425S578000, C264S238000
Reexamination Certificate
active
06206681
ABSTRACT:
BACKGROUND OF THE INVENTION
This invention relates to a method of and a mold for producing a connector, and more particularly to a method of producing a connector of the type having a retainer attached to a connector housing from a front side thereof or a rear side thereof.
There are known connectors called “front retainer type” and connectors called “rear retainer type” (see FIGS.
6
and
7
). Reference is first made briefly to the front type connector shown in FIG.
6
. Cavities
31
for respectively receiving metal terminals
30
are formed in a connector housing
3
, and a lance
32
for engagement with the metal terminal
30
is formed in the cavity
31
. The lance
32
is of the cantilever type, and therefore is elastically deformable. When the metal terminal
30
is inserted into the cavity, the lance
32
is first elastically deformed or flexed to be received in a flexure space formed in a lower surface of the cavity, and when the metal terminal
30
is further inserted into a predetermined position, the lance
32
is restored to engage the metal terminal
30
(primary retained condition).
A retainer
4
for preventing withdrawal of the metal terminals
30
is attached to a front portion of the connector housing
3
. Holder piece portions
34
project from the retainer
4
, and can be inserted respectively into the flexure spaces for the respective lances
32
. When the retainer
4
is attached to the housing
3
, each holder piece portion
34
is brought into facing relation to the underside of the associated lance
32
, thereby limiting the flexing of the lance
32
, so that the metal terminal
30
is positively prevented from withdrawal (secondary retained condition).
Although not shown in detail, the retainer
4
can be held in two positions, that is, a provisionally-retained position (where the depth of insertion of the retainer
4
into the housing
3
is small) and a completely-retained position (where the depth of insertion is large). In the provisionally-retained position of the retainer, the flexing of the lances
32
is allowed, thereby enabling the insertion of the metal terminals
30
. In the completely-retained position of the retainer, the flexing of the lances
32
is limited as described above, thereby preventing the metal terminals
30
from being withdrawn.
On the other hand, in the rear retainer-type connector shown in
FIG. 7
, cavities
40
are formed in a connector housing, and metal terminals
42
can be inserted into these cavities, respectively. A rear retainer can be moved relative to the connector housing between a provisionally-retained position and a completely-retained position as in the front type connector. In the provisionally-retained position of the rear retainer, a terminal retaining pawl
44
, formed in each cavity, is primarily engaged with a jaw
43
of the associated metal terminal
42
. When the rear retainer is moved into the completely-retained position, edge portions
41
of the rear retainer engage rear ends of the metal terminals
42
, respectively, in a secondary manner, thereby holding the metal terminals
42
against withdrawal.
In the production of either of the above connectors, the housing
3
and the retainer
4
have been molded separately from each other, using separate molding machines, and these molded parts have been brought into an assembling site where the parts have been assembled together to form the connector. This assembling operation has been carried out either by an automatic machine equipped with a part feeder or by a manual operation.
In the above conventional techniques, however, the molding of the housing
3
and retainer
4
and the assembling operation of connecting them together have been effected separately, and the finished product has been obtained through the molding step, the conveyance step and the assembling step. Moreover, when the parts have been assembled by the operator, an examination step has been further required. Thus, many steps have been required for obtaining the finished product, and this has increased the manufacturing cost. Furthermore, it is necessary to take care of the mold for the housing
3
and the mold for the retainer
4
, and therefore its management cost has been added.
SUMMARY OF THE INVENTION
The present invention has been made in view of the above problems of the prior art, and an object of the invention is to provide a method of producing a connector at low costs.
To achieve the above object, the invention provides a method and a mold metal of producing a resin-molded product assembled by at least two resin components, in that a plurality of resin component be fit with each other are molded by a pair of metal molds which are movable to be close to and away from each other in an axial direction, the resin components are moved to face with each other, one of the resin components is moved to be close to the other resin component to assemble the resin components together in a predetermined condition.
In the invention, when the two molds are closed together, the plurality of molding cavities are formed between the two molds. The molten resin is filled in these cavities to mold the resin components. After the resin is solidified, the molds are opened away from each other, so that the molded resin components to be assembled together are retained on the two molds, respectively. Then, the molded resin components are moved in the mold by the moving mechanism, so that they are faced each other in the common axis. Then, at least one of the resin components is moved by the assembling mechanism toward the other resin component, so that the two resin components are assembled together in the predetermined condition.
According to the invention, the sequential steps, that is, the molding of the plurality of resin components and the assembling operation for these molded resin components, are carried out in the mold, and therefore the resin-molded product can be obtained at low costs because of the shortened process. And besides, in the open condition of the mold, the resin components can be assembled together by slightly operating the assembling mechanism, and therefore the time required for this operation is shorter as compared with the case where resin components are assembled together utilizing a mold-closing operation, and also the required energy is smaller.
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Ito Hikaru
Kawase Hajime
Sasai Osamu
Tsutsui Shinsuke
Wada Yasunori
Luk Emmanuel
Oliff & Berridg,e PLC
Pyon Harold
Sumitomo Wiring
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