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Wet process technique of PU flexible foam top-liner

A production process and top lining technology, applied in household components, upper structure sub-assembly, application, etc., can solve the problems of poor product rigidity, heavy product weight, easy to sag, etc., and achieve the effect of good rigidity and reduced top lining weight

Active Publication Date: 2009-01-07
WUXI GISSING AUTO PARTS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing top lining is usually directly molded by composite PU boards. This molding process mainly has the following problems: 1. The sound absorption index cannot meet the requirements; 2. The product has poor rigidity, especially long-sized products are easy to sag and break; 3. The product is heavy, which is not conducive to the lightweight and energy saving of the whole vehicle

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Production of Shanghai GM Epsilon II top liner, top liner specification: 1850×1500mm.

[0020] The production process of the top lining is as follows:

[0021] (a) Rolling glue: Use a glue rolling machine to roll glue on the upper and lower surfaces of the PU top lining substrate. The glue for rolling is water-based glue. The speed of the glue rolling machine is controlled at 35 rpm. The distance between the rollers is controlled at 0.4mm, and the amount of glue on each side of the upper and lower surfaces of the PU top lining substrate is controlled at 150g / m 2 ;

[0022] (b), glass fiber spilling: adopt cutting machine to cut glass fiber, each single side of the upper and lower surfaces of the PU top lining base body of step a evenly sprinkles the cut glass fiber, each single side of the upper and lower surface of the PU top lining base body The spilled amount of glass fiber on the surface is controlled at 90g / m 2 (preferably range), and then cover the upper and lo...

Embodiment 2

[0036] Produce the top lining of Shanghai General Model D16, the specification of the top lining is 1900×1450mm

[0037] The production process of the top lining is as follows:

[0038] (a) Rolling glue: Use a glue rolling machine to roll glue on the upper and lower surfaces of the PU top lining substrate. The glue for rolling coating is water-based glue. The speed of the glue rolling machine is controlled at 40 rpm. The distance between the rollers is controlled at 0.6mm, and the amount of glue on each side of the upper and lower surfaces of the PU top lining substrate is controlled at 170g / m 2 ;

[0039] (b), glass fiber spilling: adopt cutting machine to cut glass fiber, each single side of the upper and lower surfaces of the PU top lining base body of step a evenly sprinkles the cut glass fiber, each single side of the upper and lower surface of the PU top lining base body The spilled amount of glass fiber on the surface is controlled at 110g / m 2 , and then cover the up...

Embodiment 3

[0053] Produce Shanghai General Model D51 top lining, the top lining specification is 2100×1450mm.

[0054] The production process of the top lining is as follows:

[0055] (a) Rolling glue: Use a glue rolling machine to roll glue on the upper and lower surfaces of the PU top lining substrate. The glue for rolling is water-based glue. The speed of the glue rolling machine is controlled at 38 rpm. The distance between the rollers is controlled at 0.5mm, and the amount of glue on each side of the upper and lower surfaces of the PU top lining substrate is controlled at 160g / m 2 ;

[0056] (b), glass fiber spilling: adopt cutting machine to cut glass fiber, each single side of the upper and lower surfaces of the PU top lining base body of step a evenly sprinkles the cut glass fiber, each single side of the upper and lower surface of the PU top lining base body The spilled amount of glass fiber on the surface is controlled at 100g / m 2 (preferably range), and then cover the upper...

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PUM

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Abstract

The invention relates to a wet producing process for PU soft foam roof lining. The process comprises the following steps: rubber coating, glass fiber sprinkling, pressure molding, cooling to shape, fabric fitting, cooling to shape, water jet cutting and accessory mounting. The wet producing process has the advantages that the weight of the roof lining produced by the method of the invention is greatly reduced, the requirement of the lightweight design for the complete machine is met, the rigidity of the product is good, the nearly 3 meter long product cannot be broken nor droops, and the harmful substances cannot be generated during the overall production process.

Description

technical field [0001] The invention relates to a wet-process production process of a PU soft-foam top lining, in particular to a wet-process production process for a PU soft-foam top lining which is installed on the roof of a car and plays the roles of heat insulation, sound insulation and beautification , belongs to the technical field of automotive interior parts manufacturing. Background technique [0002] Automotive interior parts are generally installed on the top of the car to play the role of heat insulation, sound insulation and beautification. In the era of more and more pursuit of high performance, environmental protection, energy saving, lightweight, and individualization, the interior of a car, like the shape of a car, has become an important factor for people to choose a car. Therefore, the requirements for automotive interior parts are getting higher and higher. In the prior art, performance indicators such as high sound absorption, low grammage, and high st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60R13/02B29C70/50B29K75/00B29K309/08B29L31/30
Inventor 刘明春
Owner WUXI GISSING AUTO PARTS CO LTD
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