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Wet production process of low-density soft polyurethane foam top lining

A technology of polyurethane soft foam and production process, applied in metal processing, layered products, chemical instruments and methods, etc., can solve the problems of poor product rigidity, heavy product weight, easy sagging, etc., and achieve good rigidity and reduced top lining weight. Effect

Inactive Publication Date: 2010-02-17
WUXI GISSING AUTO ACOUSTIC PARTS TECH 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

example 1

[0019] The headlining of Shanghai General Model Epsilon II is produced, and the specification of the headlining is: 1850×1500mm.

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

[0021] (a) Rolling glue: Roll glue on the upper and lower surfaces of the polyurethane material base with a glue rolling machine. The glue applied to the roll is water-based glue. The speed of the glue rolling machine is controlled at 35 rpm. The spacing is controlled at 4mm, and the amount of glue on each surface of the upper and lower surfaces of the polyurethane material substrate is controlled at 150g / m 2 ;

[0022] (b), glass fiber sprinkling: use a cutting machine to cut the glass fiber, and evenly sprinkle the cut glass fiber on each single side of the upper and lower surfaces of the polyurethane material substrate in step a, and the sprinkling amount is controlled at 90g / m2 2 , and then cover the upper and lower surfaces of the polyurethane material top lining substrate with ...

example 2

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

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

[0038] (a), Rolling glue: use a rolling machine to roll glue on the upper and lower surfaces of the polyurethane material base. The glue applied to the rolling machine is water-based glue. The speed of the rolling machine is controlled at 40 rpm, and the upper and lower rollers of the rolling machine are The spacing is controlled at 8.5mm, and the amount of glue on each side of the upper and lower surfaces of the polyurethane material substrate is controlled at 120g / m 2 ;

[0039] (b), glass fiber sprinkling: use a cutting machine to cut the glass fiber, and evenly sprinkle the cut glass fiber on each single side of the upper and lower surfaces of the polyurethane material substrate in step a, and the sprinkling amount is controlled at 110g / m2 2 , and then cover the upper and lower surfaces of the polyuretha...

example 3

[0053] The headlining of Shanghai General Model 258 is produced, and the specification of the headlining is 3060×1550mm.

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

[0055] (a), Rolling glue: use a rolling machine to roll glue on the upper and lower surfaces of the polyurethane material base. The glue applied to the roll is water-based glue. The speed of the rolling machine is controlled at 38 rpm, and the upper and lower rollers of the rolling machine are The spacing is controlled at 8.5mm, and the amount of glue on each side of the upper and lower surfaces of the polyurethane material substrate is controlled at 200g / m 2 ;

[0056] (b), glass fiber sprinkling: use a cutting machine to cut the glass fiber, and evenly sprinkle the cut glass fiber on each single side of the upper and lower surfaces of the polyurethane material substrate in step a, and the sprinkle amount is controlled at 150g / m2 2 , and then cover the upper and lower surfaces of the polyur...

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Abstract

The invention relates to a production process of a top lining, in particular to a wet production process of a low-density soft polyurethane foam top lining. The production process can be applied to alow-density soft polyurethane foam top lining which is arranged on the top of an automobile and has the effects of heat insulation, sound insulation and beautification, and the production process belongs to the technical field of manufacture of automobile interior parts. According to the technical scheme of the invention, the wet production process of the low-density soft polyurethane foam top lining comprises the following steps: (a) rubber rolling: rolling rubber on the upper surface and the lower surface of a polyurethane material of the top lining by adopting a rubber rolling mill; (b) glass fiber scattering: cutting glass fibers by adopting a cutting machine; (c) pressing to mold: pressing a primary product of the soft polyurethane foam top lining of the step (b) in a mould to press the primary product by utilizing a pressing machine to form a molded semi-finished product; (d) cooling and molding for the first time: cooling the molded semi-finished product to normal temperature, and molding to form a set semi-finished product; (e) jointing surface materials; (f) cooling and molding once again; (g) cutting by a water jet; and (h) mounting accessories.

Description

technical field [0001] The invention relates to a production process of a top liner, in particular to a wet production process of a low-density polyurethane soft foam top liner, which can be used for being installed on the top of a car and has the functions of heat insulation, sound insulation and beautification. The utility model relates to a density polyurethane soft foam top liner, which belongs to the technical field of automobile interior parts manufacturing. Background technique [0002] Car 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, light weight and personalization, the interior of the car, like the appearance of the car, has become an important factor for people to buy a car. Therefore, the requirements for automotive interior parts are getting higher and higher. In the prior ar...

Claims

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Application Information

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IPC IPC(8): B60R13/02B29C43/58B26F3/00B32B37/24B32B37/06B32B37/10B32B17/04
Inventor 惠炳
Owner WUXI GISSING AUTO ACOUSTIC PARTS TECH CO LTD
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