JPS6392433A - Hollow molding - Google Patents

Abstract

PURPOSE:To obtain a blown molding onto which a functional part is provided indifferent to its installation position by a method wherein a functional part such as the mounting part of the blown item is integrally obtained at an arbitrary position by injection-molding molten resin in a blow mold during blow molding. CONSTITUTION:In case that a flange 2 is intended to be provided on an oil tank for motor bicycle at a position which is off mold parting faces 3, a mounting flange part 6 is provided in a mold by means of an upper and a lower slide cores 4 and 5 so as to injection-mold through an injection molding gate 7, which is provided outside the mold. Mounting flanges, inlets, outlets or the like can be provided without making the mold parting faces more complicated. The adhesion between the blown molding and the functional part, which is stronger than the adhesion between them in case that a separately molded functional part is insert-molded to a blown molding, is obtained, because molten resin is fused during blow molding. Further, a molding having a shape which is too complicated to cope with insert molding can be also molded. Consequently, a hollow molding, onto which a functional part is provided at an arbitrary position, can be easily provided.

Description

[Detailed description of the invention]

The present invention is characterized in that the attachment of the blow molded product can be achieved integrally at any location by injecting molten resin into the blow mold during blow molding, regardless of the location of the functional parts. This relates to hollow molded products.

[Technical background of the invention and its problems]

Conventionally, when attaching a blow molded product, functional parts such as parts were obtained by crushing the parison with mold clamping force or a slide core, or by heating separately molded functional parts and inserting and blow molding them. However, with the method of crushing using mold clamping force with a parison or slide core, functional parts can only be obtained on the mold splitting surface, and depending on the location, the mold splitting surface becomes complicated, which creates restrictions on where functional parts can be installed. However, even if separately molded functional parts are heated, inserted, and blown, the adhesive strength between the insert part and the blow molded product is weak and varies widely, resulting in a product that lacks quality stability. OBJECTS OF THE INVENTION The present invention has been made based on the above-mentioned circumstances, and provides a blow-molded product in which functional parts such as parts can be mounted anywhere.

[Summary of the invention]

The outline of the present invention for achieving the above object is that the blow molded product can be attached at any location by injecting molten resin into the blow mold during blow molding, regardless of its position. It's something you can get all at once.

[Embodiments of the invention]

Next, to explain an example, in order to install the flange (2) on the motorcycle oil tank (11) other than the mold dividing surface (8), the upper and lower slide cores 1411151 are used to install the flange part (6) in the mold. ) and an injection molding gate (71
is placed from outside the mold and injection molded.

【 Effect of the invention】

As explained above, the present invention provides a hollow molded product that is integrally provided with functional parts such as a mounting part that can be mounted at any location by combining blow molding and injection molding. Therefore, it is possible to install flanges, injection ports, discharge ports, etc. without complicating the mold-dividing surface, and the adhesion with the blow-molded product is better than that of the association where separately molded functional parts are insert-molded. Because they are fused during blow molding, a strong product can be obtained. Furthermore, it is possible to create complex shapes that cannot be accommodated by insert molding. Therefore, the present invention can easily provide a hollow molded product in which a functional part is provided at an arbitrary location, and solves the conventional problems.

[Brief explanation of the drawings] Fig. 1 is a perspective view of this embodiment. Fig. 2 is a sectional view of the blow mold of this embodiment. surface lI
: Upper slide core 3: Lower slide core B: Mounted on flange part 7; Injection molding gate

Claims (1)

[Claims] A blow molded product characterized in that functional parts such as attachment parts of the blow molded product can be integrally obtained at any location by injection molding molten resin into a blow mold during blow molding.