CN110315790B

CN110315790B - Device and method for improving poor concave image of tire

Info

Publication number: CN110315790B
Application number: CN201910429345.1A
Authority: CN
Inventors: 刘长青; 周天明; 郝树德; 王兆雷; 朱端端
Original assignee: Sailun Jinyu Group Co Ltd
Current assignee: Sailun Jinyu Group Co Ltd
Priority date: 2019-05-22
Filing date: 2019-05-22
Publication date: 2021-07-27
Anticipated expiration: 2039-05-22
Also published as: CN110315790A

Abstract

The invention relates to a device and a method for improving poor concave images of tires, wherein the device for improving poor concave images of tires comprises a transverse cylinder, a longitudinal cylinder, a scissors support rod and a scissors box, the transverse cylinder and the longitudinal cylinder are arranged in a crossed mode, the transverse cylinder drives the longitudinal cylinder to move left and right, the scissors support rod is arranged above the longitudinal cylinder, one end of the scissors support rod moves up and down under the driving of the longitudinal cylinder, the other end of the scissors support rod is connected with the scissors box, cutting scissors are arranged in the scissors box, and the cutting scissors are pneumatic scissors or electric scissors.

Description

Device and method for improving poor concave image of tire

Technical Field

The invention relates to a tire processing device and method, in particular to a device and method capable of improving poor concave image of a tire, and belongs to the technical field of tire processing.

Background

With the rapid development of automobile industry in China, the quality requirements for automobile tires are more and more strict. The tire concave image is defined in the way that the side surface of the tire is a horizontal plane, the part higher than the horizontal plane is called a convex image, the part lower than the horizontal plane is called a concave image, each tire manufacturer has the corresponding dimensional requirement of the convex-concave part, and the concave image defect refers to the condition that the concave part exceeds the standard.

The semi-steel radial tire body is a fiber rubberized cord fabric, the fiber rubberized cord fabric is cut by a cutting machine to form a framework material with a fixed width, the framework material is required to have good impact resistance and flexibility resistance, the joint parts of two end parts of the cut fiber rubberized cord fabric wound around a tire body drum for one circle are two layers of cord fabrics which are relatively thick, as shown in figure 1, most of manufacturers adopt a tire body cord fabric joint compression joint process to compress the two end parts together, and therefore when the tire is inflated, the tire body joint part bears larger tension compared with other normal parts, and the joint part can be sunken to generate poor concave image.

The concave-convex degree of the tire is directly related to the safety of the tire, the requirements of OE host factories are more and more strict, when the concave image of the tire is bad, the concave image is easy to collide with a cliff during parking, the tire cord is broken, and safety accidents are caused, so the concave image is bad, the economic benefit of tire manufacturers is severely limited, the method for controlling the concave image by the tire manufacturers at present mainly increases the thickness of the side part of the tire to weaken the visual effect caused by the concave image, but the method can increase the production cost of the tire and bring other adverse effects on the quality, comfort and the like of the tire, and therefore, no method for effectively improving the concave image of the tire is available at the present stage of the tire manufacturers.

Disclosure of Invention

The invention provides a device and a method capable of improving a concave image of a tire, aiming at the current situation that a tire manufacturer does not have an effective solution to the defect of the concave image of the side part of the tire at present.

The invention idea is as follows:

the reason that the poor concave image of the tire is generated is that when the tire is inflated, the joint part of the tire body bears higher tension than other parts, the reason that the joint part bears higher tension is that the double-layer cord fabric structure is adopted, and cord threads bear tension in the cord fabric, so if the tension of the cord threads at the joint part is reduced by shearing one layer of the double-layer cord threads, the joint part and other normal parts bear the same tension, and the problem of poor concave image of the tire is solved.

Based on the above thought, the technical solution of the present invention for solving the above technical problems is as follows:

the utility model provides an improve bad device of tire concave image, includes horizontal cylinder, vertical cylinder, scissors bracing piece and scissors box, horizontal cylinder is "ten" word cross arrangement with vertical cylinder, horizontal cylinder drives and removes about vertical cylinder, the top of vertical cylinder is located to the scissors bracing piece, the one end of scissors bracing piece reciprocates under the drive of vertical cylinder, the other end of scissors bracing piece is connected with the scissors box, it decides the scissors to be equipped with in the scissors box, it is pneumatic scissors or electric scissors to decide the scissors.

The invention has the beneficial effects that: after the curtain cloth is cut according to the specification by the forming machine, a plurality of curtain lines at one end of the curtain cloth are cut by the device, the number of the cut curtain lines is determined according to the type of the tire, then the tire is produced according to the common process, the poor phenomenon of the finally obtained tire concave image is obviously reduced, the quality of the tire is improved, and the satisfaction degree of customers is improved.

On the basis of the technical scheme, the invention can be further improved as follows.

Further, the scissors supporting rod is connected with the scissors box through a connecting block, a position sensor is further arranged on the connecting block, and the position sensor is in communication connection with the longitudinal cylinder.

Adopt above-mentioned further technical scheme's beneficial effect be, can accurately detect the limit portion position of matrix, and then the transmission signal gives vertical cylinder, stretches out the assigned position and decides the scissors and carry out the cutting of cord thread.

Further, the transverse cylinder is fixed on the bracket.

Adopt above-mentioned further technical scheme's beneficial effect be, can be convenient select suitable position fixed above-mentioned device, and then better performance.

Furthermore, the connecting block is connected with the scissors box and the scissors supporting rod through bolts.

A method for improving the poor concave image of the tire by using the device is characterized in that after a cord fabric as a framework material is cut, the cord fabric at one end of the cord fabric is cut into a plurality of cords by using the device, and then the tire is produced according to a common method.

Drawings

FIG. 1 is a schematic view of a carcass joint site configuration;

FIG. 2 is a schematic diagram of the structure of the apparatus of the present invention;

FIG. 3 is a left side view of FIG. 1;

FIG. 4 is a diagram of a cylinder extended state;

in the figure, 1, a transverse cylinder; 2. a longitudinal cylinder; 3. a scissor supporting rod; 4. a scissor box; 5. cutting off the scissors; 6. and (4) connecting the blocks.

Detailed Description

The principles and features of this invention are described below in conjunction with examples, which are set forth to illustrate, but are not to be construed to limit the scope of the invention.

As shown in fig. 2 ~ 4, a improve bad device of tire concave image, including horizontal cylinder 1, vertical cylinder 2, scissors bracing piece 3 and scissors box 4, horizontal cylinder is "ten" word cross arrangement with vertical cylinder, and horizontal cylinder drives and controls about vertical cylinder, and the top of vertical cylinder is located to the scissors bracing piece, and the one end of scissors bracing piece reciprocates under the drive of vertical cylinder, and the other end of scissors bracing piece is connected with the scissors box through the connecting block, is equipped with in the scissors box and decides the scissors, it is pneumatic scissors or electric scissors to decide the scissors.

Preferably, the connecting block is connected with the scissors box and the scissors supporting rod through bolts;

preferably, a position sensor is further arranged on the connecting block and is in communication connection with the longitudinal cylinder;

when the tire cord cutting machine is used, the transverse cylinder is fixed on the support, the position sensor can accurately detect the position of the edge of the tire body, then signals are transmitted to the longitudinal cylinder, the longitudinal cylinder extends out after receiving the signals, the cutting scissors are driven to cut the tire cord to the specified position, and the longitudinal cylinder retracts after the completion.

During the actual production of 185/60R15 tires, I tested the tire indentations produced before and after the above-described apparatus and method, and the results are shown in Table 1.

TABLE 1 results of the test of the concave image of a tire produced before and after the implementation of the device of the invention

Distinguishing	Concave image upside (mm)	Underside of concave figure (mm)
			Before implementation	0.45	0.43
After being implemented	0.15	0.25
			Effect	0.30↓	0.18↓

In addition, I have tested all the tires of type 185/60R15 produced in 2 months of 2019, one portion of the tires produced using the apparatus and method of the present invention while the other portion of the tires were still produced according to the usual method as a control, and then all the tires were tested for poor indentation, with the results shown in Table 2.

Table 2 results of tests carried out on a tyre of type 185/60R15 with the device according to the invention

The test results in tables 1 and 2 show that after the device and the method provided by the invention are applied, the DENT value of the formed tire can be reduced by 0.18-0.30 mm, the concave image qualification rate is reduced by more than 6559PPM (the specification of a PCR single-layer tire body is obvious), the bad occurrence rate of the formed tire is effectively reduced, the sales volume of a company is increased, and the brand image of the company is improved.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. An apparatus for improving the poor concavity of a tire by shearing a ply of cords or several cords in a ply of cords in a carcass joint portion; its characterized in that, including horizontal cylinder, vertical cylinder, scissors bracing piece and scissors box, horizontal cylinder is "ten" word cross arrangement with vertical cylinder, horizontal cylinder drives and removes about vertical cylinder, the top of vertical cylinder is located to the scissors bracing piece, the one end of scissors bracing piece reciprocates under the drive of vertical cylinder, the other end of scissors bracing piece is connected with the scissors box, it decides the scissors to be equipped with in the scissors box, it is pneumatic scissors or electric scissors to decide the scissors.

2. The device of claim 1, wherein the scissors support rods are connected to the scissors box by a connecting block, and a position sensor is further disposed on the connecting block, and the position sensor is in communication connection with the longitudinal cylinder.

3. The device of claim 2, wherein the connecting block is connected to the scissor box and the scissor support rod by bolts.

4. The device according to any one of claims 1 to 3, wherein the transverse cylinder is fixed to a bracket.

5. A method for improving the poor concave image of a tire, which is characterized in that after a cord fabric as a framework material is cut off, a plurality of cords at one end of the cord fabric are cut off by using the device of any one of claims 1 to 3, and then the production of the tire is continued.