1. A method for measuring porosity of a tread product is characterized by comprising the following steps:

1) weighing m of the tread product by a meter scale_MeasuringThe weight deviation percentage of the obtained tread product is measured asWherein m is_{Standard of merit}Is a set value;

2) scanning area S of the tread product by using a scanner_ScanningThe percent of the deviation of the scanning area of the obtained tread product is measured to beWherein S_{Standard of merit}Is a set value;

3) using the formula

Wherein the content of the first and second substances,

after the finishing, the mixture is put into a vacuum drying oven,

subjecting the measured values in step 1) and step 2)Andand substituting the formula to obtain the porosity.

Background

In the extrusion process of the tread product, air holes are inevitably generated due to volatilization of small molecular substances in the rubber material and mixing of air at a feeding port. Too large or excessive air holes can directly affect tire quality. At present, no instrument for directly measuring the porosity exists, a method for measuring the specific gravity also brings great errors, and the data quantity is insufficient.

Disclosure of Invention

In order to solve the technical problems, the invention aims to provide a method for measuring the porosity of a tread product, which has high precision and convenient data acquisition.

In order to achieve the purpose, the invention adopts the following technical scheme:

a method for measuring porosity of a tread product comprises the following steps:

1) weighing m of the tread product by using a rice scale_MeasuringThe weight deviation percentage of the obtained tread product is measured asWherein m is_{Standard of merit}Is a set value;

2) scanning area S of the tread product by using a scanner_ScanningThe percent of the deviation of the scanning area of the obtained tread product is measured to beWherein S_{Standard of merit}Is a set value;

3) using the formula

Wherein the content of the first and second substances,

after the finishing, the mixture is put into a vacuum drying oven,

subjecting the measured values in step 1) and step 2)Andand substituting the formula to obtain the porosity.

The method has the advantages of convenient implementation, simple equipment, effective improvement of data accuracy and overcoming of the problem of large error in measuring the porosity of the tread product in the prior art.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The following described embodiments are exemplary and are intended to be illustrative of the invention and are not to be construed as limiting the invention.

A method for measuring porosity of a tread product comprises the following steps:

1) weighing m of the tread product by using a rice scale_MeasuringThe weight deviation percentage of the obtained tread product is measured asWherein m is_{Standard of merit}Is a set value;

2) scanning area S of the tread product by using a scanner_ScanningThe percent of the deviation of the scanning area of the obtained tread product is measured to beWherein S_{Standard of merit}Is a set value;

3) using the formula

Wherein the content of the first and second substances,

after the finishing, the mixture is put into a vacuum drying oven,

subjecting the measured values in step 1) and step 2)Andand substituting the formula to obtain the porosity.

The method has the advantages of convenient implementation, simple equipment, effective improvement of data accuracy and overcoming of the problem of large error in measuring the porosity of the tread product in the prior art.

It should be noted that the above embodiments are merely representative examples of the present invention. Many variations of the invention are possible. Any simple modification, equivalent change and modification of the above embodiments according to the spirit of the present invention should be considered to be within the protection scope of the present invention.