What are the rubber appearance inspection machines? What are the main items tested in rubber testing

Hello, Lei Mingxin sealing ring: rubber sealing ring is a processed product in the machinery and equipment industry, each line has its own quality inspection standards to define whether the product is qualified. The visual inspection standards of O-ring rubber seals (referred to as O-rings) include the shape, characteristics and size of O-ring defects, the classification of surface defects and the specified requirements.

Lei Mingxin sealing ring tells you!

1. O-ring rubber sealing ring appearance quality inspection standard number:

Second, the appearance of the quality inspection standard letter symbol represents:

D1 stands for: O-ring inner diameter.

D2 stands for: O-ring cross-sectional diameter.

e stands for: Misaligned size.

f represents: the height and width of the extension part of the convex trimming convexity.

i stands for: over-trim width.

g represents: the width of the mold opening and shrinkage.

h represents: the depth of mold opening and shrinkage.

j is for the length of the flow mark (only allowed along the circumferential direction).

k represents: the depth of the flow mark (only allowed in the circumferential direction).

l represents: length and width of concave and convex defects.

m stands for: concave and convex defects depth and height.

3. Description of the grade of the quality of the appearance quality inspection standard:

Class n (General): Suitable for general use.

S class (higher level): It is suitable for use occasions with high requirements for appearance quality of heaven and earth.

NZ class, SZ class (special grade): At most three types of defects can be selected in N or S grade, and higher appearance quality requirements are specified, which are called NZ or SZ grades, and should be agreed upon by both the supplier and the buyer.

Fourth, the appearance quality of the standard quality of the appearance quality inspection.

Size: The size and tolerance of the finished O-ring should conform to the GB Hydraulic Pneumatic O-ring Rubber Seal Size Series and Tolerance" or the provisions of the relevant national standards.

General requirements: O-rings are not allowed to have pores, cracks, bubbles; The surface should be smooth and clean, and surface defects should not exceed the specified limits.

Surface Defects: The types of surface defects of o-rings and their quality requirements should be in accordance with the provisions in the table.

The maximum allowable limit for surface defects in O-shaped rubber seals.

In rubber products enterprises, there are generally the following kinds of instruments: rubber tensile testing machine, rubber wear resistance testing machine, ozone aging test chamber, vulcanization tester rubber hardness tester, rubber flexion testing machine, high and low temperature test chamber.

Rubber appearance inspection machines include: machine vision inspection equipment, optical image screening machines, automatic testing equipment, etc., which can detect the appearance of rubber.

Rubber tube inspection:

Physical index: volatile, ash, Mooney viscosity, vulcanization curve, Mooney coke time and other mechanical properties: hardness, tensile properties, tear properties, compression properties, impact properties, friction properties, fatigue resistance, peel strength, adhesive strength and other thermal properties

Vertical combustion, horizontal combustion, smoke density, limiting oxygen index, flame spread rate, thermal stability and other electrical properties: surface resistance, surface resistivity, volume resistance, volume resistivity, breakdown voltage, dielectric strength, dielectric loss, anti-static performance and other weather resistance test: aging test (ultraviolet, xenon lamp, carbon arc lamp, ozone), liquid resistance test, cold and thermal shock and other chemical analysis:

Ingredient analysis, heavy metal testing, RoHS, grade identification, etc.

1. The testing instruments used in the rubber industry include hardness tester, variable temperature box, resistance testing instrument, ozone aging instrument, tensile testing machine, etc.

2. Hardness tester: the hardness of rubber is tested.

Variable temperature chamber: mainly to test the low and high temperature service limits of rubber, as well as to measure the aging time at different temperatures.

Resistance test instrument: mainly test the surface resistance and volume resistance of rubber.

Ozone aging meter: It mainly tests the aging rate of rubber in an environment with a certain concentration of oxygen and ozone.

Tensile testing machine: test the tensile strength, elongation and tear strength of rubber.

3. Testing instruments include non-destructive testing instruments, quality testing instruments and analytical instruments. The main purpose of the quality testing instrument is to test the mechanics, weather resistance and other properties of the product, and to control the production quality and product performance.

1. Rubber.

Tensile testing machine.

Rubber products enterprises generally choose a single-column rubber tensile testing machine. Through the rubber tensile testing machine, the rubber products are tested for tensile, tear, peeling, compression, bending, shear and other tests, and some performance parameters such as tensile strength, elongation, elastic modulus, and yield strength of the product are measured, so as to judge whether the product meets customer requirements.

2. Rubber wear-resistant testing machine.

Rubber abrasion resistance testing machine (also known as rubber friction and wear testing machine or rubber abrasion testing machine) is widely used in rubber, the test method is that the rotating sample is against a pair of wear wheels, and the specified load, the sample rotates to drive the wear wheel to wear the sample, and the wear loss weight is the weight difference between the sample before and after the test.

3. Ozone aging test chamber.

It is used to test the ozone aging resistance and ultraviolet resistance of rubber and its products. The ozone aging chamber simulates and strengthens the ozone conditions in the atmosphere, studies the action law of ozone on rubber, quickly identifies and evaluates the anti-ozone aging performance of rubber and the protective effect of anti-ozone agent, and then takes effective anti-aging measures to improve the service life of rubber products.

4. Rubber vulcanization testing machine.

The rubber vulcanization testing machine (also known as the vulcanization instrument) is to measure the rubber mixture at a certain temperature at a certain temperature, and the change of rubber properties can be seen from the torque time curve on the recorder. Rubber vulcanization testing machines can be used to determine the properties of unvulcanized rubber and find out the most suitable vulcanization time for the compound. Generally, the vulcanizer is used for the research and development of new products and the inspection of products by the quality inspection department.

5. Hardness tester.

Hardness testers are used to measure the hardness of rubber products.

6. Rubber bending testing machine.

The rubber flex testing machine is suitable for rubber materials, sandwiched between the rubber flex testing machines, after continuous bending fatigue, observe the degree of cracking to understand or compare its durability.

Rubber tube inspection:

Physical index: volatile, ash, Mooney viscosity, vulcanization curve, Mooney coke time and other mechanical properties: hardness, tensile properties, tear properties, compression properties, impact properties, friction properties, fatigue resistance, peel strength, adhesive strength and other thermal properties

Vertical combustion, horizontal combustion, smoke density, limiting oxygen index, flame spread rate, thermal stability and other electrical properties: surface resistance, surface resistivity, volume resistance, volume resistivity, breakdown voltage, dielectric strength, dielectric loss, anti-static performance and other weather resistance test: aging test (ultraviolet, xenon lamp, carbon arc lamp, ozone), liquid resistance test, cold and thermal shock and other chemical analysis:

Ingredient analysis, heavy metal testing, RoHS, grade identification, etc.

Vulcanization Characteristics, Mooney Viscosity, Mooney Coke, Giman Test, Plasticity, Density, Resistivity, Oxygen Index, Akron, Tensile Strength, Young's Modulus, Brittle Temperature, Tracking Leakage, Volatile Ash, Compression Set, Solid Content, pH Value, Hardness, Compressive Strength, Swelling, Vertical and Horizontal Combustion, Drum Abrasion, Elongation at Break, Resilience, Hot Air Aging, Liquid Resistance, Ash, Salt Spray Test, Artificial Climate Aging, Thermal Conductivity, Voltage Resistance, Dielectric Strength, Dielectric Constant, Loss tangent, leakage current, tracking resistance index.

Vulcanization Characteristics, Mooney Viscosity, Mooney Coke, Giman Test, Plasticity, Density, Resistivity, Oxygen Index, Akron, Tensile Strength, Young's Modulus, Brittle Temperature, Tracking Leakage, Volatile Ash, Compression Set, Solid Content, pH Value, Hardness, Compressive Strength, Swelling, Vertical and Horizontal Combustion, Drum Abrasion, Elongation at Break, Resilience, Hot Air Aging, Liquid Resistance, Ash, Salt Spray Test, Artificial Climate Aging, Thermal Conductivity, Voltage Resistance, Dielectric Strength, Dielectric Constant, Loss tangent, leakage current, tracking resistance index.

1 By raw material** and method.

Rubber can be divided into two categories: natural rubber and synthetic rubber. Among them, the consumption of natural rubber accounts for 1 3, and the consumption of synthetic rubber accounts for 2 3.

2 According to the appearance of rubber.

Rubber can be divided into four categories: solid rubber (also known as dry rubber), emulsion rubber (referred to as latex), liquid rubber and powder rubber.

3 According to the properties and uses of rubber.

In addition to natural rubber, synthetic rubber can be divided into general synthetic rubber, semi-general synthetic rubber, special synthetic rubber and special synthetic rubber.

4 According to the physical form of rubber.

Rubber can be divided into hard rubber and soft rubber, raw rubber and rubber compound, etc.

5. According to the type of rubber and the form of cross-linking, in industrial use, rubber can be classified as follows.

The first category is divided into ordinary rubber, heat-resistant rubber, oil-resistant rubber, weather-resistant rubber, special chemical medium resistant rubber, etc.

The routine testing items of rubber are as follows:

Physical and mechanical properties:

Density, hardness, surface resistivity, dielectric properties, tensile properties, impact properties, tear properties, compression properties, adhesive strength, wear resistance, low temperature properties, resilience properties.

Aging performance: thermal aging, ozone aging, ultraviolet lamp aging, salt spray aging, xenon lamp aging, carbon arc lamp aging, halogen lamp aging.

Liquid Resistance:

Lubricating oil, gasoline, motor oil, acids, alkalis, organic solvents, water resistance.

Combustion performance: vertical combustion, alcohol blowtorch combustion, roadway propane combustion, smoke density, combustion rate, effective combustion calorific value, total smoke release.

Applicable performance: hydraulic resistance, pulse test, electrical conductivity, water tightness, air tightness.

You can see the web link at this link.

Rally machine. Vulcanizer. Viscometer. Abrasive machine. Plasticizers. Flexing machine. Sclerometer. density meters, etc.

1. Rubber universal testing machine: it can carry out mechanical tests such as tensile, compression, tear, bending strength, elastic modulus, upper and lower yield strength, elongation and other mechanical tests on rubber materials;

2. Aging test chamber: It can be used for hot air aging test of rubber and plastic products, electrical insulation and other materials to test the accelerated aging results of plastics;

3. Rubber and plastic low-temperature brittleness testing machine: it can make a comparative appraisal of the performance of rubber waterstop materials under low temperature conditions;

4. Punching machine: for rubber factories and scientific research units to punch and cut standard rubber test pieces before tensile test;

5. Cutter: with the sampling machine of the film processor, it can cut samples such as stretching and tearing;

6. Abrasion testing machine: abrasion test on rubber materials;

7. Hardness tester: used to determine the hardness of vulcanized rubber and plastic products;

8. Thickness gauge: used to measure the thickness of vulcanized rubber and plastic products;

9. Plasticity test: the slicer is used to take a sample with a diameter of 16mm, and then do a plasticity test on the plasticity testing machine;

10. Compression deformer: used for vulcanized rubber, thermoplastic rubber at room temperature, high temperature and low temperature, with a certain compression ratio, after a certain compression time to measure the deformation of rubber;

11. Impact elasticity testing machine: determine the rebound value of vulcanized rubber with hardness between 30-85IRHD;

12. Rotorless vulcanization instrument: used to determine the characteristics of unvulcanized rubber, and find out the suitable vulcanization time of the rubber compound;

13. Mooney viscometer: used to determine the Mooney viscosity, scorch time and fluidization index of various unvulcanized natural rubber, synthetic rubber and recycled rubber.