JPH06213087A - Manufacture of intake system parts - Google Patents

Abstract

PURPOSE:To provide the manufacture of intake system parts being excellent in resin manufacturability and high in reliability. CONSTITUTION:In a method, manufacturing a resin intake system component with two curved circulation pipes 1 in which intake air circulates in a parallel manner, two curved resin molds 2 and 3 are parallelly positioned and, after resin molding is carried out in use of two curved cores 4 in parallel with this resin mold, these cores are drawn out of the resin mold as rotating the curved cores.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a resin-made intake system component which is mainly mounted on an intake system of a vehicle engine and in which intake air flows inside a distribution pipe.

[0002]

2. Description of the Related Art Intake system parts for vehicle engines, such as intake pipes and surge tanks, are generally made of metal such as aluminum die-cast products and welded assemblies. However, since it is not possible to meet the demand for weight reduction, it has been proposed to replace the production of the intake system parts with a strong and light synthetic resin material having excellent heat resistance.
As described above, when the intake pipe, the surge tank, and the like are made of resin, blow molding, split molding, and then split manufacturing in which these are weld-molded, or core fusion molding is used.

[0003]

However, in blow molding, it is difficult to obtain uniform wall thickness accuracy due to uneven thickness due to partial unevenness of molding conditions. Therefore, there is a problem that not only is it time-consuming, but there is a problem that the flow of intake air is disturbed by burrs, and in core melt molding, it takes time and cost because the core is melted and taken out after resin molding. It was

The present invention solves the above problems,
An object of the present invention is to provide a highly reliable method for manufacturing an intake system component having excellent resin manufacturability.

[0005]

In order to achieve the above object, the present invention manufactures a resin intake system component having a plurality of flow pipes in which intake air flows and is arranged in parallel and curved. In the method, a plurality of resin molds arranged in parallel and curved are positioned, and after resin molding is performed using a plurality of cores arranged in parallel and curved by this resin mold, while rotating the curved cores. It is characterized in that it is pulled out from the resin mold.

[0006]

According to the method of manufacturing the intake system component having the above structure,
After the resin molding, the resin intake system component can be molded by simply pulling it out while rotating the core, and the intake system component having excellent manufacturability and high reliability can be obtained.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1A shows an intake pipe of an intake system component used in an automobile engine and a resin manufacturing mold, and FIG. 1B shows a state in which a core is pulled out from the resin mold while rotating. FIG. 2 shows a plan view of the intake pipe. The intake pipe 1 shown in the drawing is interposed between a surge tank and a cylinder head, and is formed so as to distribute the intake air in the surge tank to each cylinder. The entire intake pipe 1 is a polymer resin material containing a reinforcing material. Is formed by.

The intake pipe 1 is made of a resin mold by combining a plurality of upper molds 2 and lower molds 3 which are arranged in parallel and curved, and a resin is injected after the core 4 is mounted on the resin mold. After curing, the core 4 is pulled out from the resin mold while rotating, and the pulled out core 4a is brought into the state of FIG.
The lower die 3 is separated, the intake pipe 1 is taken out, and the molding is completed.

The intake pipe 1 thus formed is attached to the surge tank and the cylinder head (not shown) by the flanges 5 and 6.

[0010]

As described above in detail in the embodiments,
According to the method of manufacturing an intake system component according to the present invention, after the resin is injected into the resin molding and then the resin is hardened, the core is rotated and pulled out to separate the upper mold and the lower mold and take out the intake pipe. It is possible to form a highly reliable air intake system component that is excellent in manufacturability.

[Brief description of drawings]

FIG. 1A shows an intake pipe and a resin manufacturing mold according to an embodiment of the present invention. (B) shows a state in which the core is pulled out while rotating.

FIG. 2 shows a plan view of the intake pipe.

[Explanation of symbols]

 1 Intake pipe 2 Upper mold 3 Lower mold 4 Core

Claims (1)

[Claims] 1. A method of manufacturing an air intake system component made of resin, which has a plurality of flow pipes in which intake air flows and is arranged in parallel and curved, wherein a plurality of resin molds arranged in parallel and curved are positioned. Of the intake system parts, characterized in that after resin molding is performed using a plurality of cores arranged in parallel and curved by this resin mold, the curved cores are pulled out from the resin mold while rotating. Production method.