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Method for producing a fuel tank for a motor vehicle and fuel tank for a motor vehicle

A technology for fuel tanks and motor vehicles, applied in the direction of layout, application, power plant, etc. combined with the fuel supply of internal combustion engines, capable of solving problems such as shrinkage bending and manufacturing tolerance changes, difficulty in assembling refueling and operating exhaust devices, etc.

Active Publication Date: 2011-05-11
KAUTEX TEXTRON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Especially when molding the tank to be manufactured there are currently difficulties in assembling the refueling and running the exhaust in the tank, since the position of the exhaust point on the subsequent tank wall may vary due to shrinkage bending and manufacturing tolerances

Method used

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  • Method for producing a fuel tank for a motor vehicle and fuel tank for a motor vehicle
  • Method for producing a fuel tank for a motor vehicle and fuel tank for a motor vehicle
  • Method for producing a fuel tank for a motor vehicle and fuel tank for a motor vehicle

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Embodiment Construction

[0037] The method according to the invention essentially firstly Figures 1 to 3 Explanation. The method consists in extruding two web-shaped or sheet-shaped preforms 1 from a thermoplastic material by means of one or more extruders (not shown) arranged above the die 2 . These preforms 1 can be obtained here by cutting out tube-like preforms or alternatively extruded from wide-slit nozzles. These preforms 1 are basically constituted by a coextrusion of six layers formed of polyethylene, a regrind layer (scrap layer), an adhesive layer and an EVOH barrier layer for hydrocarbons. The layer structure of such extrudates is basically known. The preforms can be extruded directly above the mold in the direction of gravity, alternatively they can be removed from the extrusion head by means of a handling device and transferred into the mold 2 .

[0038] Die 2 in Figures 1 to 3 is shown partially cut away in top view. These molds comprise two outer molds 3a, 3b and an intermediate m...

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Abstract

The invention relates to a method for producing a fuel tank and to a fuel tank for motor vehicles. The method comprises the extrusion of web-type preforms (1), the shaping of said preforms in the first heat of the extrudate in a multi-part moulding tool in a first step to form shell-type semi-finished products (6, 6a, 6b) and in a second step in the same moulding tool (2) to form a one-piece closed container. At least one refuelling and / or operational ventilation unit (5) is fixed to the inner wall of at least one semi-finished product, in such a way that at least one pre-assembled part of the refuelling and / or operational ventilation unit comprising at least one connection fitting (5c), at least one ventilation line (5b) and at least one functional component is bonded and / or positively connected in an operation to the inner wall (7a). The wall of the semi-finished product comprising the connection fitting is punctured by the connection fitting during assembly, using at least one length-adjustable line section as part of the ventilation line.

Description

technical field [0001] The invention relates to a method for producing a fuel tank for a motor vehicle from thermoplastic and to a fuel tank for a motor vehicle made of thermoplastic, the fuel tank comprising at least one refueling and operating venting device arranged inside the fuel tank, In this case, at least one exhaust gas line runs between a fixed connection point on the inner wall of the tank and a through-opening through the tank wall. Background technique [0002] Motor vehicle fuel tanks made of thermoplastic material are produced in one piece by extrusion blow molding or by welding injection-molded thermoplastic half-shells. It is also known that these motor vehicle fuel tanks are produced by deep drawing or thermoforming of plate-shaped plastic semi-finished products. Fuel tanks for motor vehicles typically include inserts such as fuel pumps, level sensors, vent valves, degassing containers, and oil and gas filters. Known fuel tanks are made from polyolefins, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C51/12B60K15/03B29C65/56
CPCB29C37/0082B29C49/20B29C51/10B29C51/12B29C51/267B29C65/028B29C65/58B29C65/609B29C66/30325B29C66/532B29C66/54B29C66/83221B29C2049/2008B29C2791/006B29C2793/0018B29K2023/06B29K2023/086B29K2101/12B29K2995/0069B29L2009/00B29L2031/7172B60K15/03177B29C66/53247B29C66/71B29C66/61B29C66/112B29C66/1222B29C66/1224B29C66/131B29C66/7234Y10T29/49833Y10T29/4998Y10T137/86348B29C49/06914B29C49/0691B29C2049/4881B29C65/00B29D22/003
Inventor D·奥伊利茨H·洛伦茨G·沃尔特
Owner KAUTEX TEXTRON
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