Quality inspection method and quality inspection system for unvulcanized rubber material, and production method and production system for unvulcanized rubber material

Patent metadata

Field	Value
Publication number	US-11826928-B2
Application number	US-201816770934-A
Country	US
Kind code	B2
Filing date	Sep 26, 2018
Priority date	Dec 8, 2017
Publication date	Nov 28, 2023
Grant date	Nov 28, 2023

Abstract

Provided are a quality inspection method and a quality inspection system for unvulcanized rubber material. A final dielectric constant measurement device detects the dielectric constant of a final rubber material in which a compounding agent of predetermined type is mixed with unvulcanized rubber, and a calculator calculates a compounding ratio of the compounding agent to the final rubber material based on the detected dielectric constant, determines whether or not the calculated compounding ratio is in a preset compounding reference range, displays a determination result on a monitor, and adjusts a ratio of the compounding agent fed into an extruder to the unvulcanized rubber such that the calculated compounding ratio is within the compounding reference range.

First claim

The invention claimed is:

1. A production method for producing a final rubber material, the method comprising:
feeding a primary rubber material that is a mixture of unvulcanized rubber and an unvulcanizing compounding agent of predetermined type, and a vulcanizing compounding agent of predetermined type into an extruder;
mixing the primary rubber material and the vulcanizing compounding agent in the extruder to continuously produce a final rubber material;
calculating a compounding ratio of the vulcanizing compounding agent to the final rubber material by a final calculator based on a dielectric constant of the final rubber material extruded from the extruder; and
adjusting a ratio of the vulcanizing compounding agent fed to the extruder to the unvulcanized rubber such that the calculated compounding ratio is within a preset vulcanizing compounding reference range.

2. The production method according to claim 1 , further comprising:
dividing the final rubber material into multiple segments in a plan view and detecting the dielectric constant for each of the segments;
calculating a degree of dispersion of the vulcanizing compounding agent in the final rubber material by the final calculator based on a magnitude of a variation in the detected dielectric constants in the segments; and
determining whether or not the calculated degree of dispersion of the vulcanizing compounding agent is within a preset vulcanizing dispersion reference range.

3. The production method according to claim 2 , further comprising:
categorizing the segments into a plurality of ranks by the final calculator based on a magnitude of the dielectric constants of the segments, and displaying the segments on a final monitor such that the respective categorized ranks are distinguishable.

4. The production method according to claim 1 , further comprising:
feeding the unvulcanized rubber and the unvulcanizing compounding agent into a kneading means other than the extruder and performing mixing to continuously produce primary rubber material;
calculating a compounding ratio of the unvulcanizing compounding agent to the primary rubber material by a primary calculator based on a dielectric constant of the primary rubber material; and
adjusting a ratio of the unvulcanizing compounding agent fed to the kneading means to the unvulcanized rubber such that the calculated compounding ratio of the unvulcanizing compounding agent is within a preset unvulcanizing compounded reference range.

5. The production method according to claim 3 , further comprising:
feeding the unvulcanized rubber and the unvulcanizing compounding agent into a kneading means other than the extruder and performing mixing to continuously produce primary rubber material;
calculating the compounding ratio of the unvulcanizing compounding agent to the primary rubber material by a primary calculator based on a dielectric constant of the primary rubber material; and
adjusting a ratio of the unvulcanizing agent fed to the kneading means to the unvulcanized rubber such that the calculated compounding ratio of the unvulcanizing compounding agent is within a present unvulcanizing compounded reference range.

Assignees

• Yokohama Rubber Co Ltd

Inventors

• Onodera Satoshi

Classifications

• B29B7/726 Primary

  Measuring properties of mixture, e.g. temperature or density (B29B7/724 takes precedence) · CPC title

• B29B7/007

  for continuous mixing · CPC title

• B29B7/42

  with screw or helix · CPC title

• B29B7/90

  Fillers or reinforcements {, e.g. fibres} · CPC title

• C08J3/203

  Solid polymers with solid and/or liquid additives · CPC title