JPS6018335A - Manufacture of hollow molded body having fixing bracket - Google Patents

Abstract

PURPOSE:To enable to form the titled molded body on a wider position through monolithic molding without being limited a position of a bracket, by fixing a base piece of the fixing bracket molded with a main body unitarily is joined with the main body for fixing by bending the base piece at a thin hinge part. CONSTITUTION:A main body 1 of a duct for a motor car is a hollow molded main body having an air blow-off part 2 on its upper part and is molded unitarily by blow molding through mold opening to the right and the left by making a parting line 3 into a dividing line. A fixing bracket 4 along with a base piece 5 meting at a certain angle with the bracket 4 are molded on a position along a parting line 3 at the outside of the top of a center of the main body 1 unitarily through a thin hinge part 6. In addition to the above, a pair of connecting protruded stripes 7 confronting in parallel with each other from both edges of a thin hinge part 6 and having a hook-shaped cross section is molded on the external surface of the main body 1 unitarily. Then both side edge parts of the base piece 5 are fitted in the pair of connecting protruded stripes 7 and the bracket 4 is fixed to a predetermined position. The fixing bracket 4, consequently, is provided on a position getting out of the parting line 3 in a protruded state.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a hollow molded body having a mounting bracket for, for example, an automobile duct 1-.

Conventionally, many hollow molded bodies of this type have been manufactured by blow molding, but the mounting bracket for attaching this hollow molded body is designed to attach the hollow molded body by crushing the parison on the parting line. It is formed to protrude from the molded body.

However, with this J: joint, especially when installing a mounting bracket in a part far away from the center position of the hollow molded body, the parison may be partially stretched or compressed, resulting in extremely thin parts. This is undesirable as it creates folds and folds. Also, there may be undercuts in the direction of die cutting,
Shapes that intersect at acute angles cannot be formed. In addition, for example, in the case of automobile ducts, the shape is limited due to the space around the inner part and performance, and the design is designed to obtain the optimal molding state within the limited shape. However, when the bracket for mounting (=J) is integrally molded with the main body, the parting line must be changed due to the process to provide the mounting bracket, which makes it impossible to obtain the optimal molding condition and There is also a change in the desired wall thickness. Therefore,
In such cases, a separately formed mounting bracket 1
〜(J) has been completed, and the number of man-hours will also increase.

The present invention is an attempt to solve the above-mentioned problems, and its purpose is to provide a bracket that can be formed in a wide range of positions by integral molding without limiting the position of the bracket for J. be.

The manufacturing method of the present invention includes integrally molding a mounting bracket with its base piece at a position along the parting line on the outside of the hollow molded body body via a thin hinge part, and The piece is bent from the thin hinge part, joined to the main body, and fixed,
The mounting bracket can be placed at a predetermined position by bending the base piece of the mounting bracket 1 through a thin hinge part.

Hereinafter, one embodiment of the present invention will be described with reference to FIGS. 1 to 3.

Reference numeral 1 denotes a duct body for an automobile as a hollow molded body body, and this body 1 has an air blowing part 2 at the upper part. Then, press this air blowing part 2! The main body 1 of the J-ru is integrally molded by blow molding by opening the left and right molds using the parting line 3 as a dividing line.

Further, a mounting bracket 4 is integrally formed with the main body 1 along with a base piece 5 having river stones via a thin hinge part 6 at a position along the parting line 3 on the outside of the upper center of the main body 1. Furthermore, a pair of locking protrusions 7 having a hook-shaped cross section are formed integrally with the main body 1 on the outer surface of the main body 1 from both ends of the thin hinge portion 6 in parallel to each other. Then, bend the base piece 5 of the mounting bracket 4 from the thin hinge part 6 to attach it to the main body 1.
Then, both side edges of the base piece 5 are fitted onto the pair of locking protrusions 7, and the mounting bracket 4 is fixed in a predetermined position. As a result, it was installed at a position away from the above parding line 3 (=
J bracket 4 will be installed protrudingly.

The imaginary lines in FIGS. 4 and 5 indicate when the mounting bracket 4 and its base piece 5 are integrally molded at a position along the parting line 3 on the outside of the main body 1 via a thin hinge part 6 during molding. It indicates the condition.

In addition to fixing the mounting bracket 4 to the main body 1, as shown in FIG. Ultrasonic melting 68
As shown in FIG.
It may be fixed to the main body 1 using a glue spatula 1-9 such as synthetic resin.

According to the present invention, the mounting bracket is connected to the main body together with its base piece at a position along the parting line on the outside of the hollow molded body main body!・: The base piece of the mounting bracket is molded in one piece, and the base piece of the mounting bracket is bent at the thin hinge part and fixed and covered with the main wood, so the mounting bracket can be protruded on the outside of the main body other than the parting line, and it can be molded. It is possible to form a bracket for the parting line without changing the basic parting line, and therefore the parting line will have a uniform thickness no matter where the bracket for the parting line is set. It is possible to set the most suitable position for making a hollow molded body.
There is no change in the wall thickness of the main body due to the molding of the bracket, and the quality can be stabilized. Also,
When compared with conventional mounting brackets made of metal or plastic that are assembled to a hollow molded body, the product according to the present invention has a structure in which the mounting bracket is integrated with the main body together with its base via a thin-walled hinge. It’s being formed! In addition, the thin hinge part plays the role of positioning the bracket for several phrases, and the position of the mounting bracket can be determined simply by bending the mounting bracket with the base piece. There is no need to provide a special positioning part, so the mounting position of the mounting bracket can be easily and securely mounted, and the required number of mounting brackets can be formed together with the main body at the same time, making manufacturing easy.

[Brief explanation of drawings]

The drawings show embodiments of the present invention, in which Fig. 1 is a perspective view showing an example of a hollow molded body, Fig. 2 is a perspective view of a part of Fig. 1, and Fig. 3 is a perspective view of a part of Fig. 1. A partial front view, FIG. 4, and FIG. 5 are sectional views showing other examples of fixing the bracket. 1. Hollow molded body, 3. Parting line, 4
...Mounting bracket, 5. Base piece, 6. Hinge part. Funeral Figure 4 Figure 5 Figure 7Q-

Claims (1)

[Claims] (1) A mounting bracket is integrally molded with the main body along with its base piece through a thin hinge part at a position on the outside of the hollow molded body main body at the parting line, and the base piece of the mounting bracket is attached to the thin hinge part. A method for manufacturing a hollow molded body having a mounting bracket, which comprises bending, joining and fixing the hollow molded body to the main body.