JPS62101420A - Method and device for treating terminal in insert molding - Google Patents

Abstract

PURPOSE:To prevent the generation of poor appearances at the terminal sections of a decorated material by a method wherein a molding mold is provided with inserting walls, which are protruding individually upon molding, at positions corresponding to the terminal sections of the decorated material to be set in the molding mold so as to be capable of being advanced or retreated. CONSTITUTION:A decorated material Mb is set at a predetermined position in the molding surface 1a of a molding mold 1, thereafter, a vacuum pump 5 is operated to adhere and fix the decorated material Mb. Next, a parison Ma, consisting of a synthetic resin material, is set at the side of the molding surface 1a of the mold 1 and the other molding mold is clamped, thereafter, air W is supplied into the parison Ma to start molding. Then, a movable die plate 10 is operated immediately before starting the molding to advance it toward the molding mold and project the tip ends of inserting walls 8, provided at the tip end of a rod member 9, toward the molding surface 1a of the mol1 while the tip end section Mc of the decorated material Mb and the periphery thereof are bent toward the parison Ma by the protruded section. In this case, the parison Ma is formed so as to cover the protruded inserting wall 8 and the terminal section Mc of the decorated material Mb as the molding is progressed whereby the invasion into the bent section Me of the decorated material Mb may be prevented.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a method for inserting and molding a decorative material such as fabric or leather partially on the surface of a resin molded product.
The present invention relates to a method and an apparatus for processing the end portion of the decorative material simultaneously with the molding of the resin molded product.

[Conventional technology]

Conventionally, resin molded products used as interior parts of automobiles are molded from synthetic resin materials such as ABS resin, polypropylene resin, and AS resin, and are generally used as resin molded products as they are.

However, in recent years, as designs have become more sophisticated, it has become necessary to partially apply decorative materials such as fabric or leather to the surface of resin molded products.

In this case, the method for molding the decorative material includes a method in which the resin molded product is used as a base material and the decorative material is molded all over it by vacuum forming, and a method in which the decorative material is applied partially in the mold during molding of the resin molded product. An insert molding method is used in which decorative materials are set and molded.

[Problem that the invention seeks to solve]

However, although the former molding method is suitable for covering the entire resin molded product with decorative material,
There is a problem in that the molding operation becomes complicated when the decorative material is partially provided. In addition, in the latter molding method, during molding of the resin molded product, the synthetic resin material filled in the mold wraps around the end of the decorative material, causing the decorative material in that area to roll up and cause poor appearance. Not only that, but also due to the shape constraints of the resin molded product, there is a problem in that a separately processed decorative material must be attached in a later process.

Therefore, this invention has been made to solve the above-mentioned problems, and an insertion wall that protrudes individually during molding is moved into and out of the mold at a portion located at the end of the decorative material set in the mold. By arranging it so that it is possible to do so, the purpose is to facilitate the molding operation of the decorative material and to prevent the occurrence of poor appearance at the end portion of the decorative material.

[Means for solving problems]

That is, in the end treatment method for insert molding according to the present invention, when insert molding a decorative material partially on the surface of a resin molded product, the end treatment method of the end part of the decorative material set in the mold is Insertion walls that are provided in the mold so that they protrude individually during molding are made to protrude during the molding process of the resin molded product, and the end of the decorative material is bent toward the resin molded product at the protruding portion, and the resin is inserted into the insertion wall. The molded product is molded in such a way that a part of the molded product is covered.

Further, the end treatment device for insert molding according to the present invention is a mold that partially insert-moldes a decorative material on the surface of a resin molded product and at the same time processes the end portion of the decorative material. A plurality of suction holes are formed in the part of the mold where the decorative material is set, and these suction holes are connected to a vacuum pump, and a resin molded product is formed in the mold of the part located at the end of the decorative material. Insertion walls that individually protrude during the process are provided so that they can move forward and backward relative to the molding surface.

[Effect]

In such a terminal processing device for insert molding,
When processing the end portion of a decorative material that is molded into a part of a resin molded product, after placing the decorative material in a predetermined area on the molding surface of the mold, a vacuum pump is activated to remove the decorative material. Adsorb and fix. At this time, when the molding method is blow molding or compression molding, the synthetic resin material as the molding material is set on the molding surface side, the mold is clamped, and molding is started. Furthermore, during injection molding, the mold is clamped, and a synthetic resin as a molding material is injected onto the molding surface.

Immediately before the start of molding, the insertion wall is made to protrude toward the molding surface, and the end of the decorative material is bent at the protruding portion toward the synthetic resin side that is the molding material. At this time, as the molding progresses, the synthetic resin is molded to cover the protruding insertion wall and the end of the decorative material, and the synthetic resin is blocked by the insertion wall and enters the folded part of the decorative material. is hindered. As a result, the parting portion of the decorative material is neatly formed. In addition, during molding, the decorative material is fixed by vacuuming, so the synthetic resin approaches the molding surface before other parts, so it contacts from the center of the decorative material toward the ends, and the ends Involving or
Synthetic/synthetic resin covers over the entire surface without deforming it.

Then, in a state where the surface layer of the synthetic resin in contact with the molding surface is cooled and its shape is maintained to some extent, the insertion wall is retreated from the molding surface. As a result, the synthetic resin further fills the gap between the bent portion and the end portion of the decorative material.

When the resin molded product is molded, the end of the decorative material is bent into the synthetic resin at a substantially right angle, and is sandwiched between the synthetic resins on both sides.

〔Example〕

EMBODIMENT OF THE INVENTION Hereinafter, the terminal processing method and its processing apparatus in insert molding which concern on this invention are demonstrated in detail based on drawing.

FIG. 1 is a partially enlarged sectional view of an end processing device for insert molding according to the present invention.

In FIG. 1, 1 is one mold used for blow molding, and one side of this mold 1 is a molding surface 1a, and the other surface is an outer surface 1b of the mold 1. . Further, another mold (not shown) formed in the same shape is disposed on the molding surface Ia side of the mold 1, and during molding, both molds are clamped and the molding space 2 is closed. It is beginning to form. A parison Ma made of synthetic resin is placed in this molding space 2 before both molds are clamped.

Further, one of the molds 1 is formed with a plurality of suction holes 3 that are open to the molding surface 1a, and the tip of each suction hole 3 on the molding surface la side has a small diameter. Further, the rear end of each suction hole 3 on the outer surface lb side is connected to one suction path 4 and connected to a suction pipe 6 leading to a vacuum pump 5.

Then, a decorative material Mb such as fabric or leather is set on the molding surface 1a in which the suction hole 3 is formed, and when the vacuum pump 5 is operated, the decorative material is attracted and fixed. .

In addition, in the mold 1 near the end portion Me of the decorative material Mb,
Insertion grooves 7 penetrating from the outer surface 1b toward the molding surface 1a are formed here and there, and on the molding surface Ia side of the inside thereof, insertion walls 8 are respectively protruded toward the molding surface Ia side of the mold 1. It has become. Furthermore, a part of the insertion a7 has an outer surface l.
A rod member 9 protruding toward the b side is fixed, and a movable die plate 10 is fixed to the rear end thereof.

Then, when the movable die plate 10 moves forward toward the mold 1 side, a part of the insertion wall 8 protrudes onto the molding surface 1a, and the molding surface 1a
The terminal portion Mc of the decorative material adsorbed on the mold and its vicinity is bent toward the parison Ma, and when the movable die plate 0 retreats from the mold 1, the protruding portion of the insertion wall 8 is formed. It is designed to be immersed up to surface 1a.

Next, a method for processing the ends of the decorative material Mb using the end processing apparatus configured as described in Section 2 will be described.

FIG. 2 is a process diagram illustrating the end treatment method in the insert molding method according to the present invention, and FIG. 3 is a sectional view of a resin molded product obtained by the end treatment method of FIG. 2.

As shown in FIG. 2(a), after applying the decorative material Mb to a predetermined portion of the molding surface 1a of the mold 1, the vacuum pump 5
is operated to attract and fix the decorative material Mb. next,
A parison Ma made of a synthetic resin material is set on the molding surface la side of the mold 1, the other mold (not shown) is clamped, and air W is supplied into the parison Ma to start molding.

Then, just before the start of molding, the movable die plate 10 is activated and moved forward toward the mold 1 side, so that the tip of the insertion wall 8 provided at the tip of the rod member 9 protrudes toward the molding surface 1a side of the mold 1. Then, the tip portion Mc of the decorative material Mb and its surroundings are bent toward the parison Ma at the protruding portion.

At that time, as the molding progresses, as shown in FIG. 2(b), the insertion wall 8 from which the parison Ma protrudes and the decorative material Mb
It is formed so as to cover the terminal portion Mc of. At this time, as shown in FIG. 2(c), the folded portion Md of the parison Ma that has gone around is blocked by the insertion wall 8, and the decoration material Mb is prevented from entering the folded portion Me. As a result, the parting portion of the decorative material is neatly formed.

In addition, in the molding process, since the molding surface 1a of the decorative material Mb is fixed by vacuuming, the parison M
Since a approaches the molding surface 1a before other parts, it comes into contact with the terminal part Mc of the decorating material Mb, and the parison Ma is made without involving or deforming the terminal part Me.
It's covered in a lot of water.

Then, in a state where the surface layer of the parison Ma in contact with the molding surface 1a of the mold 1 is cooled and its shape is maintained to some extent, the movable die plate 10 is moved as shown in FIG. 2(d). In reverse operation, the mold 1 is moved back in the opposite direction to retract the protrusion of the insertion wall 8 provided at the tip of the rod member 9. As a result, the space between the folded portions of the parison Ma further fills the gap between the tip end Mc of the decorative material and the folded portion Me.

Then, at the same time as the molding is completed, the other mold is opened and the resin molded product M held on the molding surface 1a is taken out. As a result, as shown in FIG. 3, the end portion MC of the decorative material Mb is bent at a substantially right angle, and is formed into a shape sandwiched between the parisons Ma on both sides.

In this blow molding, joining is performed with the parison h in a softened state embracing the terminal part Me of the decorative material and its surroundings, so in the case of decorative material Mb such as fabritta, the resin will not penetrate into the fabric. Bonding can be achieved by biting, but depending on the type of decorative material, it may not be possible to obtain the desired bonding strength. It is also possible to mold the material by applying an agent thereto.

In this example, molding was performed by Piko molding, but according to the present invention, the invention is not limited to this example. It can also be applied to the method of At that time, when performing compression molding, after placing the heated decorative material on the molding die, the insertion wall is made to protrude from below onto the molding surface, and as the mold is clamped, the insertion wall is retracted so that its tip is slightly It is best to mold it in a protruding state. Further, in the case of injection molding, the temperature of the mold is raised by about 20 to 30° C. compared to general molding, and the insertion wall can be made to protrude from the molding surface immediately before injection molding is completed.

[Effects of the Invention] As explained above, in the end treatment method and processing device for insert molding according to the present invention, the end treatment method and the processing device for insert molding according to the present invention provide the Since the insertion walls that protrude individually are provided so that they can move forward and backward, the end portion of the decorative material can be inserted into the base material of the resin molded product at the same time as molding, which prevents appearance defects at the end portion of the decorative material. It is effective in preventing

Further, in the present invention, since the end portion of the decorative material can be covered with the base material of the resin molded product, it is possible to prevent the decorative material from being peeled off.

Further, in the present invention, since it is only necessary to cut the decorative material into a predetermined shape as a pre-processing of the decorative material to be provided on the resin molded product, the molding work of the decorative material can be easily performed and the work can be simplified. It has the effect of

In addition, in the present invention, if the decorative material is laminated with a foam material etc. in advance and molded, it is possible to give a soft feel to some parts, and it is possible to give a different design to the skin material. .

[Brief explanation of drawings]

FIG. 1 is a partially enlarged sectional view of an end processing device for insert molding according to the present invention. FIG. 2 is a process diagram illustrating the end treatment method in insert molding according to the present invention. FIG. 3 is a cross-sectional view of the amount of resin formed by the end treatment method shown in FIG. 2. 1-111...Molding mold 2-7-Molding space 3...---One suction hole ・4 =----
-Suction path 5--Vacuum pump 6--Suction pipe? -------Insertion groove 8 --- Insertion wall 9 --- Bar member 10 --- --- Movable die plate M ------- Resin molded product Ma --- - Parison question - Decorating material Mc - 1 - 1 Terminal section Applicant Toyota Motor Corporation (?5) (C) 2nd (b) Figure

Claims (2)

[Claims] (1) When partially insert-molding a decorative material on the surface of a resin molded product, inserts are provided in the mold at the end portions of the decorative material set in the mold so that they protrude individually during molding. The inserted wall is made to protrude during the molding process of the resin molded product, the end of the decorative material is bent toward the resin molded product at the protruding part, and a part of the resin molded product is molded over the insertion wall. A terminal processing method in insert molding characterized by the following. (2) A mold for partially insert-molding a decorative material on the surface of a resin molded product and treating the end portion of the decorative material at the same time, where multiple pieces of the decorative material are placed in the part of the mold where the decorative material is set. A suction hole is formed in the mold, the suction hole is connected to a vacuum pump, and an insertion wall that protrudes individually in the molding process of the resin molded product is formed on the molding surface of the mold at the end portion of the decorative material. A terminal processing method in insert molding, characterized in that the terminal is provided so as to be movable forward and backward.