Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation method of polyurethane flexible pipe for automobile exhaust manifold

A polyurethane flexible and automobile exhaust technology, which is applied in exhaust devices, mechanical equipment, textiles and papermaking, etc., can solve the problems of softness of flexible pipes and short service life, and achieve ideal softness and long service life , The operation process is not cumbersome effect

Inactive Publication Date: 2017-01-11
WUHU EVERSHINE AUTOMOTIVE COMPONENT
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the structure of the exhaust manifold, flexible pipes are generally used. The softness of the existing flexible pipes is not ideal, and the service life is short, requiring frequent replacement.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A polyurethane flexible pipe used for automobile exhaust manifolds is made of polyvinyl chloride synthetic leather, polyurethane and clay, and the weight ratio between polyvinyl chloride synthetic leather, polyurethane and clay is 1:2:3.

Embodiment 2

[0026] The preparation method of polyurethane flexible pipes used in automobile exhaust manifolds, first melt polyvinyl chloride synthetic leather and polyurethane through a twin-screw extruder, add clay at the head of the machine, mix well, inject the melt pump, and then enter the mold Extrude to obtain polyurethane flexible pipes for automobile exhaust manifolds.

Embodiment 3

[0028] The preparation method of polyvinyl chloride synthetic leather, the steps are as follows:

[0029] (1) Mix the raw materials of the surface layer, stir and filter to obtain the surface layer slurry,

[0030] (2) Then preheat the release paper, apply and scrape the surface layer slurry on the surface of the release paper, heat and plasticize to form a film;

[0031] (3) Stir and filter the foam layer slurry to obtain the foam layer slurry;

[0032] (4) Coat the foam layer slurry on the surface layer and foam at 120°C;

[0033] (5) Using water-based polyurethane slurry as an adhesive layer to bond the foam layer to the raised cloth, peeling and winding to obtain polyvinyl chloride synthetic leather.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to the technical field of machining of automobile exhaust pipes, in particular to a preparation method of a polyurethane flexible pipe for an automobile exhaust manifold. The polyurethane flexible pipe for the automobile exhaust manifold is prepared by compounding polyvinyl chloride synthetic leather, polyurethane and clay, and the weight ratio of the polyvinyl chloride synthetic leather, the polyurethane and the clay is 1:2:3. The preparation method comprises the following steps: melting the polyvinyl chloride synthetic leather and the polyurethane through a twin-screw extruder, adding the clay to the head of the twin-screw extruder for uniform mixing, injecting the mixture into a melt pump, and then feeding the mixture into a mold for extrusion, so as to obtain the polyurethane flexible pipe for the automobile exhaust manifold. The polyurethane flexible pipe for the automobile exhaust manifold is relatively ideal in flexible degree and long in service life. In addition, the preparation method is relatively simple and convenient, the operation process is not cumbersome, and the preparation cost is relatively low.

Description

technical field [0001] The invention relates to the technical field of automobile exhaust pipe processing, in particular to a method for preparing polyurethane flexible pipes used in automobile exhaust manifolds. Background technique [0002] The exhaust manifold is connected to the cylinder block of the engine, and the exhaust gas of each cylinder is collected and introduced into the exhaust manifold, with divergent pipelines. The main requirements for it are to minimize exhaust resistance and avoid mutual interference between cylinders. When the exhaust is too concentrated, there will be mutual interference between the cylinders, that is, when a certain cylinder exhausts, it happens to encounter the undischarged exhaust gas from other cylinders. In this way, the resistance of the exhaust will be increased, thereby reducing the output power of the engine. The solution is to separate the exhaust of each cylinder as much as possible, one branch for each cylinder, or one bra...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B29C47/00B29C69/00C08L75/04C08L27/06C08K3/34D06N3/14F01N13/10
CPCB29C48/10B29C69/00C08L75/04C08L2203/18D06N3/0043D06N3/0097D06N3/146D06N3/147D06N2211/28F01N13/10C08L27/06C08K3/346
Inventor 刘华
Owner WUHU EVERSHINE AUTOMOTIVE COMPONENT