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Method and injection mould for the production of an intake system composed of plastic for internal combustion engines and intake system produced

An air intake system, injection mold technology, applied in mechanical equipment, engine control, machine/engine, etc., can solve problems such as hindering the installation of bearing bushings

Inactive Publication Date: 2012-01-25
MAHLE INT GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These conditions prevent bearing bushings from being used for common shaft installations

Method used

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  • Method and injection mould for the production of an intake system composed of plastic for internal combustion engines and intake system produced
  • Method and injection mould for the production of an intake system composed of plastic for internal combustion engines and intake system produced

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] The mandrels 1 and 2 , which are axially supported against each other on a plane 10 , inside the injection mold, which is not shown in the drawing, have the effect of producing the holes in the intake duct.

[0020] The two pull-out directions for demoulding are designated Z1 and Z2.

[0021] The dotted lines indicated at 3, 4, and 5 indicate the position of the intake duct in which the holes corresponding to the bearing bushes must remain unobstructed. In the present case, three intake ducts operate in parallel, however, it should be understood that more than three intake ducts may also belong to the intake system.

[0022] Denoted by 6, 7, 8, and 9 each is the stage or location of the mandrel, which is used to form the corresponding hole in the intake pipe.

[0023] It is evident from the figures that a larger diameter has been selected for the left and right outer air intake pipes for the holes than for the air inlet pipe in the middle.

[0024] By virtue of this s...

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PUM

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Abstract

The invention relates to a method which uses an injection mould for the production of an intake system which is composed of plastic and is intended for internal combustion engines, and which has a plurality of parallel-running intake pipes and which has, arranged in the intake pipes, throttle flaps operated by way of a shared shaft bearing against bearings located in the walls of the intake pipe.A simplified production process is obtained if two mandrels (1, 2) of the injection mould, intended for formation of apertures for the bearings, are inserted respectively from one side of the injection mould in such a way that ends of the mandrels (1, 2) bear against one another in the injection mould, and if the method of production of apertures situated further outwards, with respectively greater diameter than the adjacent inwardly situated apertures is such that each mandrel (1, 2) is of staged shape, and the mandrels (1, 2) are drawn out during demoulding at the two sides of the injectionmould.

Description

technical field [0001] The invention relates to a method for the production of an intake system made of plastic and used in an internal combustion engine. [0002] The invention further relates to an air intake system produced by the method described above and an injection molding tool for carrying out the method. Background technique [0003] When the intake system is produced as a whole, there is the difficulty that the machine parts, namely the slider or the mandrel, respectively, for forming the aperture in the intake duct are very long, where the bearings A bearing bush is then inserted into the hole. This leads to difficulties in the demoulding process. [0004] These difficulties can be avoided by using tapered shaped mandrels. However, this means that the two holes of the intake duct have different diameters and their walls are inclined. These conditions prevent bearing bushings from being used for common shaft installations. [0005] From DE 101 42 452 A1 a pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C45/33F02D9/10
CPCB29C45/33F02D9/1095
Inventor 维尔纳·施纳贝尔西格弗里德·戴斯
Owner MAHLE INT GMBH