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Oil filling port molding method for two-sheet blow molding process and preparation device

A molding method and blow molding technology, which are applied in the field of blow molding of fuel tanks, can solve the problems of increasing the evaporative emission of hydrocarbons, difficult to meet the requirements of emission regulations, and high cost, and achieve low cost, low cost, and easy operation. Effect

Active Publication Date: 2013-10-23
YAPP AUTOMOTIVE PARTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the traditional fuel filler is connected to the tank body through punching and welding after the fuel tank is blow-molded, on the one hand, punching and welding will easily lead to a higher increase in the evaporative emission value of hydrocarbons, which is difficult to meet the most stringent requirements in California, the United States. The state's PZEV and LEV III vehicle emission regulations require 54mg / day; on the other hand, due to the high cost of the fuel filler injection molding parts, it is also necessary to reduce the cost of the fuel filler to reduce the unit cost of the fuel tank assembly

Method used

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  • Oil filling port molding method for two-sheet blow molding process and preparation device

Examples

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Effect test

Embodiment 1

[0036] see figure 1 — Figure 6 , in order to achieve the above object, the technical scheme of the present invention is as follows, a fuel filler filler molding method applied in the two-piece blow molding process, the molding method includes the following steps, see figure 1 ,

[0037] 1) Feeding, this step is mainly two pieces, the molten parison is respectively fed into the two gaps formed by the preform template 3 and the two mold halves 1; see figure 2 , 2) The mold half 1 is closed with the preform template 3; 3) High pressure blow molding; see image 3 , 4) Mold 1 opens and preform template 3 exits; see Figure 4 , 5) The fuel filler extrusion molding device moves in; see Figure 5 , 6) The mold half-mold 1 is closed again; 7) High-pressure blow molding, and the fuel filler is extruded; 8) The fuel filler extrusion molding device is moved out;

[0038] 9) The mold is fully opened again; 10) The product is taken out.

[0039] The main feature of this method is th...

Embodiment 2

[0040] Example 2 : As a further improvement of the present invention, a cooling device is provided on the fuel filler extrusion molding device in the step 5. The cooling device adopts cooling water, and the cooling device enables sufficient cooling of the fuel filler structure and has sufficient strength to prevent deformation in the later stage. All the other results and advantages are exactly the same as in Example 1.

Embodiment 3

[0041] Example 3 : see figure 1 , as a further improvement of the present invention, in the step 2, the preform template 3 is provided with a protrusion 4, and the number of the protrusion 4 is two, which are symmetrically arranged on both sides of the preform template 3, and the mold The mold half 1 is provided with a groove 5 corresponding to the protrusion 4 . There is a protruding structure at the filling port of the fuel tank corresponding to the preform template 3 device, and a groove structure is provided on the mold. After closing with the mold, the external shape of the filling port is formed when the structure is closed by the protrusion and the groove. The molding method is different from blow molding. It uses the blank of the fuel tank to form the external shape of the fuel filler while performing the preformed seal. After this process, the external structure of the fuel filler is formed in half on the left and right sides of the fuel filler. . All the other r...

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Abstract

The invention relates to an oil filling port molding method for a two-sheet blow molding process. The molding method is characterized by comprising the following steps of: (1) feeding is carried out, wherein two plasticizing mould blanks are respectively charged into two gaps formed by a pre-molded template and a half-mould of a mould; (2) the half-mould of the mould and the pre-molded template are closed; (3) high-pressure blow molding is carried out; (4) the mould is opened and the pre-molded template is discharged; (5) an oil filling port extruding and molding device is placed; (6) the mould is closed again; (7) high-pressure blow molding is carried out and the oil filling port extruding and molding device is extruded and molded; (8) the oil filling port extruding and molding device moves out; (9) the mould is completely opened again; (10) a product is taken out. The method disclosed by the invention is simple in step and easy to operate; production and one piece costs are effectively reduced and the performance and the yield of products are improved; the investment of later punching and welding procedures is reduced; the emission of HC compounds of an oil tank is reduced, and thus the higher requirements of emission regulations can be met.

Description

technical field [0001] The invention relates to a fuel filler structure molding method and a preparation device used in a two-piece blow molding process. The fuel filler structure and its process method are suitable for the structure and connection between a two-piece hollow blow molding box and a fuel filler pipe. The method is especially suitable for the field of fuel tank blow molding manufacture. Background technique [0002] The HDPE6-layer co-extrusion blow molding technology with EVOH fuel barrier layer is the mainstream technology in the manufacture of plastic fuel tanks today. With the increasing awareness of environmental protection of the global government, relevant policies and regulations have imposed strict requirements on automobile OEMs, such as California has introduced PZEV, that is, quasi-zero emission regulations. For plastic fuel tanks produced by mainstream technologies, the total evaporative emissions, including the evaporative emissions of gasoline o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C69/02B29C49/22B29C49/18B29C49/48B29C43/02B29C43/52
Inventor 孙岩姜林刘亮苏卫东王晔
Owner YAPP AUTOMOTIVE PARTS
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