Buckles – buttons – clasps – etc. – Trim molding fastener – Plastic type
Reexamination Certificate
2001-09-27
2004-08-10
Sandy, Robert J. (Department: 3677)
Buckles, buttons, clasps, etc.
Trim molding fastener
Plastic type
C024S576100, C024S458000, C411S508000, C411S913000, C428S100000, C428S700000
Reexamination Certificate
active
06772484
ABSTRACT:
CROSS-REFERENCES TO RELATED APPLICATIONS
The present application claims priority under 35 U.S.C. §119 to Japanese Patent Application No. 2000-297206, filed Sep. 28, 2000, entitled “MANUFACTURING METHOD AND MOUNTING STRUCTURE OF SIDE BRAID”, Japanese Patent Application No. 2000-300535, filed Sep. 29, 2000, entitled “MOUNTING STRUCTURE OF CLIP TO RESIN MOLDED ARTICLE” and Japanese Patent Application No. 2001-239683, filed Aug. 7, 2001, entitled “MANUFACTURING METHOD AND MOUNTING STRUCTURE OF SIDE BRAID”. The contents of this application are incorporated herein by reference in their entirety.
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a mounting structure of a clip for mounting a resin molded article at a position where decoration is provided in a vehicle or the like, to a resin molded article, and a mounting structure and manufacturing method of the resin molded article.
2. Discussion of the Background
Conventionally, in a vehicle, an aircraft, and a ship or the like, a variety of resin molded articles considered in decorative properties are mounted on a surface of a body or the like. For example, a side braid having its superior decorative properties, and being capable of protecting a door, is used for a side door or the like of automobile. This side braid is mounted to a body panel of the door via a clip.
Amounting structure of a clip to the side braid, for example, as shown in
FIG. 32A
, includes a mounting structure (prior art 1) or the like in which a mount stay
94
is provided on a back side face
911
of a side braid
91
, a clip
95
engaged with a body panel
92
is provided at the mount stay
94
, and the side braid
91
is mounted to the body panel
92
, and the like.
However, as shown in
FIG. 32B
, in the prior art 1, as described above, the mount stay
94
is provided, and the inside of the mount stay
94
is formed in a hollow shape. Namely, upon the molding of the side braid
91
, in order to form the mount stay
94
, a slide core
961
is provided along the hollow shape in the molding die
96
.
Then, during molding of the side braid
91
, after injection-molding has been carried out, when the side braid
91
is removed, it is required to slide the slide core
961
in a longitudinal direction before removing the side braid
91
while. In the case where such a slide core
961
is employed, a sink mark
913
may occur at the periphery during molding (refer to FIG.
32
A), and there is an apprehension that the appearance characteristics of the design surface of the side braid
91
may be lowered.
In order to solve such problems, as shown in
FIG. 33
, there is a method (prior art 2) which is when forming the mount stay
94
, blowing gas
97
at a position at which the mount stay
94
is to be provided instead of the slide core
961
, thereby molding the side braid
91
. According to this method, an occurrence of the sink mark
913
caused by the slide core
961
can be restrained.
However, in the prior art 2, a manufacturing apparatus including a molding die for molding the side braid
91
becomes complicated, resulting in an increase in production cost of the side braid
91
.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a mounting structure of a clip to a resin molded article and a mounting structure and manufacturing method of the resin molded article, with the high mount strength of the structures and capable of easily manufacturing a resin molded article having its excellent design surface.
According to one aspect of the present invention, there is provided a manufacturing method of a resin molded article having a plurality of clip mounting sections, each of which constructed by erecting a pair of mount ribs having a latched section provided thereon from the back face of a main body, intermittently along a longitudinal direction, the manufacturing method including employing a lower die that corresponds to a shape of a back side face having the clip mounting section provided thereon and an upper die that corresponds to a shape of a top side face of the resin molded article, wherein the lower die has a stationary section, a first moving section movable relatively to the stationary section, and a secondary moving section movable relatively to the stationary section or the first moving section, and wherein the stationary section or the first moving section has a molding face having provided thereon an undercut portion for molding the latched section; carrying out injection-molding in a cavity formed by the lower die and upper die, thereby molding the resin molded article; releasing the upper die from the lower die; moving the first moving section, thereby forming a space inside or outside of a pair of the mount ribs at the clip mounting section; and moving the second moving section, thereby removing the latched section from the undercut portion while elastically deforming the mount ribs in a direction of the space.
In the present invention, first, a cavity for molding the main body and a pair of mount ribs at the clip mounting section is formed by the lower die and the upper die. In addition, the mold portion of each clip mounting section in this cavity is constructed by being surrounded by a face for molding an outside face of the mount ribs at the stationary section or the first moving section and a face for molding an inside face of the mount rib at the stationary section or the first moving section.
The cavity is subjected to injection-molding, thereby molding a resin molded article in which a plurality of clip mounting sections consisting of a pair of mount ribs is provided.
Next, the upper die is released from the lower die, thereby forming a space in which at least either one of the first moving section and second moving section and the resin molded article can rise upward of the lower die.
Then, at the lower die, the first moving section is moved relatively to the stationary section
At this time, either one of the face for molding the outside face of the mount rib formed at the stationary section or the first moving section and the face for molding the inside face of the mount rib is released from the outside face or inside face of a pair of the molded mount ribs. Then, a space is formed at the inside or outside of the pair of the mount ribs.
In addition, the second moving section is moved relatively to the stationary section or first moving section so as to lift the resin molded article on which the second moving section has been molded.
At this time, the resin molded article moves in a direction of the upper die to be released from the stationary section of the lower die. Then, by the face for molding the remaining face of the outside face of the mount rib formed at the stationary section or the first moving section and the inside face of the mount rib, the mount rib is elastically deformed in a direction of the space, and a latched section of the mount rib is unlatched from an undercut portion formed at the stationary section or the first moving section.
Then, the mount ribs of the molded resin molded article are released from the stationary section or the first moving section, and the resin molded article is removed from the lower die.
Namely, according to a conventional manufacturing method, in order to release a shape portion such as the latched section from the undercut portion, and remove the resin molded article from the lower die, the movement in a transverse direction is required in the lower die. On the other hand, in the present invention, the mount rib is elastically deformed, and the resin molded article is forcibly pulled out in a direction of the upper die.
Thus, the movement in the lower die may be limited to the movement in a direction opposite to the upper die of the first moving section and the second moving section. Therefore, an apparatus for manufacturing a resin molded article including the lower die and upper die can be simplified.
In addition, in the manufacturing method according to the present invention, upon molding of a resin molded article, a movement
Kawashima Daiichiro
Miyano Tetsuya
Nada Sadao
Nishikawa Tomokazu
Shibagaki Toshiro
Melwani Dinesh N
Posz & Bethards, PLC
Sandy Robert J.
Toyoda Gosei Co., LTD
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