JPS5920630A - Molding manufacturing method - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing a molding, and particularly to a method of manufacturing a molding suitable for a vehicle by blow molding.

There is a method of manufacturing synthetic resin moldings such as side Zolotecta moldings for automobiles by blow molding. Figures 1 and 2 are perspective views of this type of molding as seen from the bottom, respectively.
is a double-sided adhesive tape 6'-! as a mounting member on the back side of the molding body 2, which is a hollow blow-molded product. or clip 4 is attached. In the conventional manufacturing method, after molding main body 2 is formed by blow molding,
In the case of Fig. 1, double-sided adhesive tape 6 is attached to the back side, and in the case of Fig. 2, the clip 4 is attached using adhesive or double-sided adhesive tape 9, and these are manufactured by attaching double-sided adhesive tape 3 or clip, respectively. 4. It is used by installing the vehicle body panel at an angle.

However, in such a conventional molding manufacturing method, after the molding body 2 is blow-molded, a mounting member such as double-sided adhesive tape 3 or clip 4 is attached as a post-process, which increases the number of steps. There were problems such as difficulty in positioning the mounting member and variations occurring.

This invention was made by focusing on such conventional problems, and by performing blow molding with the mounting member set in the blow molding mold, the mounting member is fixed at the same time as molding, and The purpose is to solve the above problems.

The present invention is a method of manufacturing a molding, characterized in that a mounting member is set in a blow molding die, the mold is clamped, and a molding body is formed by blow molding, and the mounting member is fixed to the molding body. .

The present invention will be explained below with reference to the drawings. FIG. 6 is a perspective view of a molding manufactured according to an embodiment of the present invention;
FIG. 4 is a general cross-sectional view of the blow molding die, FIG. 5 is a horizontal cross-sectional view of the blow molding die showing the molding state, FIG. 6 is a partially enlarged sectional view thereof, and FIG. 1 and molding 1 are shown in FIG. 2. It has almost the same structure. 5 is a cavity type, 6 is a core type, 7 is an air blowing nozzle, and 8.8a and 8b are setting recesses, which are provided at shifted positions.

The manufacturing method is as follows: With the cavity mold 5 and the core mold 6 opened, clips 4 with adhesive 9 applied to the fixed parts are set in the setting recesses 8, 8a, 8b, and the extruder (
A parison having a cross-sectional shape almost similar to the cross-sectional shape of the molding body 2 is extruded from a molding body (not shown), the cavity mold 5 and the core mold 6 are closed to sandwich this parison, and the mold is clamped, and air is injected from the nozzle 7. Blow molding is performed by blowing.

After the air blowing is completed, the parison spreads into the cavity space in the mold to form the molding main body 2, and at the same time, the clip 4 is fixed to the back surface of the parison, and the molding 1 is manufactured.

After cooling the molding 1 manufactured in this way,
The mold is opened and taken out, and the clip 4 is inserted into the mounting hole 11 of the vehicle body panel 10 to be attached and used.

Although the above example shows the case where the adhesive 9 is applied to the clip 4 and fixed, double-sided adhesive tape or other fixing means may be used instead of the adhesive 9. Furthermore, if the resins forming the clip 4 and the molding body 2 are compatible, they can be welded together by the heat during blow molding without using them.

The above is an explanation for the same molding as shown in Fig. 2, but in the case of the molding shown in Fig. 1, if blow molding is performed with the double-sided adhesive Chisoro set in the mold,
A double-sided adhesive tape 3 can be fixed to the back surface of the molding body 2.

Furthermore, when using compatible resins, it is also possible to fix them using single-sided adhesive tape.

FIG. 7 is a sectional view corresponding to FIG. 6 of another embodiment,
In this example, a method is shown in which a bolt 13 coated with a resin layer 12 compatible with the molding body 2 is set in a mold, blow molded, and fixed integrally, and the manufactured molding 1 is a separate part. It is attached to the vehicle body panel 10 with nuts.

In the above explanation, double-sided or single-sided adhesive tape, clips, and bolts are illustrated as mounting members, but other means may also be used, and the means for fixing these to the molding body is not limited to welding or adhesion, but may also be mechanical means, etc. Good too. Furthermore, the structure of the molding body 2 is not limited to that shown in the drawings,
It can be changed, and the inside may be filled with sponge or the like.

The present invention can be applied to the manufacture of side protector moldings and other moldings for automobiles and other applications.

As explained above, according to the present invention, since blow molding is performed with the mounting member set in the blow molding mold, the fixing of the mounting part can be done at the same time as molding, reducing the number of man-hours. At the same time, it is possible to prevent the fixing position of the mounting member from shifting, dispersing, etc.

[Brief explanation of the drawing]

1 and 2 are perspective views of the molding as seen from the bottom surface, FIG. 6 is a perspective view of a molding manufactured according to an embodiment of the present invention, FIG. 4 is a general cross-sectional view thereof, and FIG. FIG. 6 is a horizontal sectional view of the blow molding die showing the molding state, FIG. 6 is a partially enlarged sectional view thereof, and FIG. 7 is a sectional view corresponding to FIG. 6 of another embodiment. In each figure, the same reference numerals indicate the same or equivalent parts, 1 is the molding, 2 is the molding body, 6 is the double-sided adhesive tape, 4 is the clip, 5 is the cavity type, 6 is the core type, 7 is the air blowing nozzle, 8 is a recess for setting, and 9 is an adhesive. Agent: Patent attorney Sei Yanagihara

Claims (4)

[Claims] (1) A method for manufacturing a molding, which comprises: clamping the mounting member set in a blow molding die, forming a molding body by blow molding, and fixing the mounting member to the molding body. (2) The method for manufacturing a molding according to claim 1, wherein the mounting member is a clip, a bolt, a double-sided adhesive tape, or a single-sided adhesive tape. (3) The method of manufacturing a molding according to claim 1 or 2, wherein the mounting member is set in a blow molding mold with an adhesive or double-sided adhesive tape coated or attached. (4) The method of manufacturing a molding according to claim 1 or 2, wherein the mounting member is coated with a resin compatible with the molding body and set in a blow molding mold.