Production technology for one-shot dry forming of car ceilings

An automobile roof, dry forming technology, applied in the direction of layered products, vehicle parts, superstructure sub-assemblies, etc., can solve the problems of poor quality and complex automobile roof manufacturing process, and achieve uniform distribution, good molding effect, and melt The effect of increased flow rate

Inactive Publication Date: 2016-09-21
芜湖正海汽车内饰件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to solve the problems of complex manufacturing process and poor quality of the car roof in the prior art, the present invention provides a production process for the

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The one-time dry molding production process of the automobile roof in this embodiment uses non-woven PET, glass fiber GF, PE rubber powder, PE film or PP film and PU sheet to form a composite material with a sandwich structure. The sandwich structure composite material of the example is laid on the bottom layer by non-woven PET, and then PE film or PP film is laid on the non-woven fabric, then glass fiber GF and PE powder are cut and sprinkled, and then PE film or PP film is laid Then lay the PU sheet, lay the PE film or PP film on the PU sheet, then cut and sprinkle the glass fiber GF and PE powder, and then lay the PE film or PP film.

[0033] The production process of the one-time dry molding of the automobile roof of the present embodiment, its steps are as follows:

[0034] Step 1: First, send the superimposed composite material into the heating furnace for preheating; the preheating process uses a special crawler conveyor to send it into the heating furnace for pr...

Embodiment 2

[0042] The production process of one-time dry molding of the automobile roof in this embodiment is basically the same as that of Embodiment 1, the difference is that in this embodiment, the composite material is heated at 270°C, and the heating time is 80s. The heated composite material was fed into a water-cooled mold at a temperature of 25° C., using a pressure of 7 MPa.

Embodiment 3

[0044] The production process of one-time dry molding of the automobile roof in this embodiment is basically the same as that of Embodiment 1, the difference is that in this embodiment, the composite material is heated at 290°C, and the heating time is 60s. The heated composite material was fed into a water-cooled mold at a temperature of 15° C., using a pressure of 12 MPa.

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Abstract

The invention discloses a production technology for one-shot dry forming of car ceilings, and belongs to the field of processing of car interior decorative parts. The technology comprises the following steps: sending a composite material with a sandwich structure, formed by nonwoven fabric PET, glass fiber GF, PE rubber powder, PE rubber films or PP rubber films and PU plates, to a heating furnace, and preheating the composite material; cutting the preheated composite material; sending the cut composite material to an electric heating zone, and heating the cut composite material; and sending the heated composite material to a die, laminating the heated composite material to a face decoration, and carrying out car ceiling pressure forming. The technology adopting the above technical scheme to carry out one-shot dry forming of the car ceilings has the advantages of simple process, low cost and excellent quality.

Description

technical field [0001] The invention relates to the field of processing automotive interior parts, in particular to a production process for one-time dry forming of an automotive roof. Background technique [0002] At present, there are two processing techniques for passenger car interior roofs with PU+GF+PET structure, thermoplastic dry process using PE or PP bonding and thermosetting wet process using PU reaction molding. Among them, the dry process has been completed in two steps, that is, first combine PU, GF and PET to form a sandwich substrate, and then heat to soften and cold press to form. [0003] In the prior art, the dry molding of the car roof is divided into two steps. The first step is to spread the non-woven PET on the bottom layer, and then cut and sprinkle glass fiber GF and PE rubber powder or PP film on the non-woven fabric, and then spread Put the PU sheet on, and then cut and sprinkle the glass fiber GF and PE rubber powder or PP film to form a sandwich...

Claims

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Application Information

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IPC IPC(8): B32B37/10B32B37/12B32B37/24B32B38/00B60R13/02B29C70/68
CPCB32B37/10B29C70/68B32B37/12B32B37/24B32B38/0004B32B38/0036B60R13/0212
Inventor 刁志勇张冰李国威程光靖广林
Owner 芜湖正海汽车内饰件有限公司
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