KR0158223B1 - Wear tester for tire tread rubber - Google Patents

Abstract

The present invention is a wear tester for comparing the wear resistance of the tire tread rubber standard specimens and a plurality of comparative specimens at the same time at the same conditions, a plurality of polishing rolls (6) mounting grooves (1a) is formed on the top The base 1, the struts 2 fixed to the four sides of the base 1 at right angles, the horizontal slide members 3 on both sides connecting the struts 2 back and forth, respectively, and the two side slide members 3, respectively. ) Is composed of a connecting member (4) interconnecting each other, the mounting groove (1a) of the base is arranged by a plurality of specimen holding parts (5) in the lower portion of the connecting member (4) .

Description

Abrasion Tester for Tire Tread Rubber

1 is a perspective view of the present invention.

2 is a side view of main parts of the present invention.

* Explanation of symbols for main parts of the drawings

1: expectation 2: holding

3: slide member 4: connection member

5: specimen holding part 6: polishing roll

7: fastening ring 8: abrasive paper

9: Rubber Specimen

The present invention relates to a wear tester that can accurately and effectively measure the abrasion resistance of tire tread rubber that is in contact with the road surface.

Conventional wear testers include a method of measuring abrasion resistance by contacting a plurality of rubber specimens rotatably coupled to a mounting device on a rotating plate made of abrasive stone, and also fixing the rubber specimen on a plate and turning the spindle on the rubber specimen. There is a method of measuring the wear resistance by rotating the knife mounted on the.

However, in the former case, since the rotating plate made of abrasive stone is impossible to replace, dust of the rubber composition generated during the test contaminates the rotating plate, which causes the precision test to be inhibited. In particular, the rubber specimen contains a large amount of oil. This phenomenon becomes worse when it contains. In the latter case, since a number of rubber specimens cannot be compared and evaluated simultaneously under the same conditions, there is a problem that reliability is questioned in comparing the performance of the standard specimen and the comparative specimen.

Accordingly, an object of the present invention can provide reliability in evaluating wear resistance of tire tread rubber by comparing and testing the wear resistance of tire tread rubber at the same time under the same conditions. By replacing the paper at the required time, a wear tester can be provided for precise testing.

In order to achieve the above object, the present invention is a base formed with a plurality of semi-cylindrical mounting grooves on the upper, vertical guide grooves are formed, respectively, the struts are fixed to the four sides of the base, respectively, vertically connected to the posts The connecting member 4 which is moved back and forth along the horizontal guide grooves of the two slide members by interconnecting the horizontal slide members on both sides and the slide members on both sides, each of which is formed with horizontal guide grooves which are moved along the vertical guide grooves of the posts. It is composed of, the mounting grooves of the base is equipped with a grinding mechanism, the lower portion of the connecting member is characterized in that a plurality of specimen holding parts are disposed.

Front and rear and right and left movements of the slide member and the connecting member are preferably realized by mounting a sensor driving mechanism on top of the connecting member.

Other features and advantages of the present invention will become more apparent from the following description based on the accompanying drawings.

1 is a perspective view of a tester according to the present invention. At the bottom, a base 1 having a semi-cylindrical mounting groove 1a of a plurality of polishing rolls 6 is provided at the top, and a post having vertical guide grooves 2a formed at four corners of the upper part of the base 1. 2) are vertically fixed to each other, and the left and right vertical guide grooves 2a are vertically opposed to each other.

Both front and rear struts 2 are connected to both side slide members 3 having horizontal guide grooves 3a formed on the vertical guide grooves 2a so as to be movable upward and downward. The horizontal guide grooves 3a face each other horizontally.

The slide member 3 on both sides is connected to the horizontal guide grooves 3a so that the connecting member 4 is movable back and forth. Preferably, a sensor driving mechanism (not shown) is mounted on an upper portion of the connecting member 4, and when the sensor driving mechanism lifts the connecting member 4, both slide members 3 connected to the connecting member 4 simultaneously. The guide grooves 3a of the slide members 3 can be lifted up and down along the vertical guide grooves 2a of the support posts 2, and the connecting member 4 is moved back and forth while the slide member 3 is fixed. Accordingly, the connecting member 4 can be moved back and forth.

In the upper mounting grooves 1a of the base 1, polishing rolls 6 on which the abrasive paper 8 is wound are respectively inserted. Threads 8a are formed at both ends of the polishing roll 6, respectively, and fastening rings 7 are fastened to fix the abrasive paper 8 to the threaded portions 8a at both ends. Therefore, when the abrasive paper 8 is wound on the outer circumferential surface of the polishing roll 6 and crushed by the saturation ring 7, the flow of the abrasive paper 8 can be prevented by the saturation ring 7, and the polishing is performed as necessary. It is also possible to replace the paper (8). In addition, the polishing rolls 6 may be rotated at a constant speed by a conventional driving means not shown.

At the lower end of the vertical arm 5a of the lower portion of the connecting member 4, as shown in FIG. 2, a plurality of specimen holding portions 5 are arranged so that the rubber specimen 9 slides along the length direction of the polishing rolls 6, as shown in FIG. It is. The specimen holding portion 5 is fitted to the lower end of the arm (5a) vertically fixed to the lower portion of the connecting member (4), the fitting discs (5b) fastened to each other by a conventional bolt portion (5d) and nut portion (5e) ) Is rotated perpendicularly to the axial direction of the polishing roll 6 through the bearing (5c), and the specimen holding portion (5) can be arranged as necessary. Therefore, when the rubber specimen 9 is sandwiched between the fitting discs 5b, the fitting discs 5b are rotatable through the bearing 5c, so that the fitting discs 5b of the specimen holding part 5b are rotated. The rubber specimen 9 fastened therebetween is slid to the abrasive paper 8 wound on the polishing roll 6 to perform abrasion resistance test while rotating the rubber specimen 9 by the rotation of the polishing roll 6. Can be.

The operation and effects of the present invention configured as described above are as follows.

First, a standard rubber specimen and a plurality of comparative rubber specimens are mounted on the specimen holding portion 5, and the abrasive paper 8 is attached to the outer circumferential surface of the polishing rolls 6 and fixed with a fastening ring 7. If necessary, the surface of the abrasive paper 8 may be used after spraying and drying the asphalt concrete or cement liquid to apply the required road surface. After the mounting of the specimens and the abrasive paper, the connecting member 4 is lowered through the sensor driving mechanism to bring the specimens mounted on the lower end of the specimen gripper 5 into contact with the abrasive paper 8 wound on the polishing roll 6. Then rotate.

Therefore, as the rubber specimens rotate as the polishing rolls 6 rotate, they are worn by the abrasive paper 8. During the test, the sensor drive mechanism presses the connecting members 4 with a constant force so that the rubber specimens and the abrasive papers 8 are equally contacted with a constant load, and the abrasive papers 8 after the specimens are worn for a certain time. When the dust is contaminated or worn with rubber dust, the connecting member 4 can be moved up and down to contact the rubber specimens with other non-contaminated portions of the abrasive papers 8 and the abrasive papers 8 can be replaced. Accurate test results of standard and comparative specimens can be obtained under the same required road surface conditions.

As described above, according to the tester of the present invention, since the wear resistance performance comparison test of the standard and comparative specimens of the tire tread rubber is performed simultaneously under the same conditions, accurate measurement and comparative evaluation are possible.

Claims (1)

A base 1 on which mounting grooves 1a of the plurality of polishing rolls 6 are formed; Vertical guide grooves (2a) are each formed, the holding posts (2) are fixed to each of the vertical perpendicular to the four corners of the base (1); The horizontal slide members 3 and the two slide members 3 on both sides, which are vertically moved along the vertical guide grooves 2a by connecting the struts 2 forward and backward, respectively, and the horizontal guide grooves 3a are formed. It is composed of a connecting member (4) which is moved back and forth along the horizontal guide groove (3a) by connecting, respectively, fastening ring (7) at both ends to secure the winding paper (8) to the mounting groove (1a) of the base ) Are rotatably inserted into the polishing rolls 6 to be fastened, and at the lower end of the plurality of vertical arms 5a connected to the lower portion of the connecting member 4, the polishing rolls are rotated according to the rotation of the polishing rolls 6. A wear tester for a tire tread, characterized in that the fitting discs (5) for fastening the specimen (9) sliding with the (6) are respectively mounted to rotate through the bearing (5c).