摘要:
Disclosed is a carcass cutting and winding apparatus which cuts carcass cord paper rubber-topped in a rolling process during manufacture of a tire according to a predetermined angle and width, and winds the carcass cord paper around a winder (6) with liner paper being interposed therebetween, to prevent folding and crumpling of the cut carcass cord paper while enabling process automation, thereby improving winding uniformity of the carcass material (2).
摘要:
The present invention provides a kerf structure for a snow tire, including unit structures on each of which spiral-shaped protrusions are continuously formed to be spaced a predetermined distance apart on the outer circumferential surface of a semicylindrical shaped column, wherein the continuously formed unit structures are arranged by alternating convex and concave portions in a zigzag formation, which is capable of optimizing the rigidity which can maintain gripping force as an original function of a kerf while ensuring a friction force generated from small blocks of a tread portion partitioned with kerfs by collapsing a block at an optimum level and further ensuring the kerf function on snow even in the last stages of tread wear by lowering the rigidity of the blocks of the tread portion.
摘要:
Tread block structure (10) of a pneumatic tire including at least one tread cone (20) having different physical properties from the outer surface toward the inner surface. According to various exemplary embodiments, the tread cones with different properties existing in the tread block may control the rigidity of the tread block without the trade-off on other tread performance, and thus the tread block structure and a pneumatic tire comprising the same exhibit an improved balance between traction, cornering performance, and abrasion resistance.
摘要:
Disclosed herein are a method of coating a sealant composition (10) to an inner surface of a tire, and a tire manufactured by the same. The method includes extracting coordinates for coating a sealant composition with reference to a central point (12) of a target tire using a computer-aided design (CAD) file of the target tire; setting robot moving coordinates and setting a coating width based on the extracted coordinates; and coating the sealant composition while moving a nozzle (14) provided to a robot arm and ejecting the sealant composition toward the set coordinates.
摘要:
Pneumatic tire and a method for manufacturing the same, wherein the pneumatic tire includes a porous sound-absorbing material adhered via a sealant layer to the inside surface of an inner liner, wherein the sealant layer comprises 100 to 400 parts by weight of polyisobutylene, 10 to 100 parts by weight of an inorganic additive and 1 to 15 parts by weight of a vulcanizing agent, with respect to 100 parts by weight of a butyl rubber; the pneumatic tire can reduce internal noise by distributing noise energy, causing generation of resonance in the tire, or changing the generated frequency without a risk of shear deformation generated between the sound-absorbing material and the tire.
摘要:
A system for analyzing tire uniformity comprises of a light source for illuminating light on a tire to being tested; a diffraction grating disposed on the same axis line between the light source and the test tire, a photographing means for taking an image of a tire having a sin pattern on its outer surface formed by diffracted light through the diffraction grating, and an analyzer for determining a uniformity of the tire by calculating the deformation on the tire. It can be appreciated that the variation of radius or width of the tire can be measured in the unloaded state as well as the localized deformation in the sidewall can also be inspected without rotating the tire in the machine. Moreover, the inventive method utilizes a photograph having a sin pattern and analyzing the sin pattern by Fourier analysis to produce an image or numerical data on the monitor, thereby enabling the analysis process to be performed in a short period of time with precision and uniformity measurement not to be affected by the condition of the test center.
摘要:
Provided is a pneumatic tire which can fundamentally prevent the phenomenon of generating cracks in the bottoms of grooves and the areas where the side walls of blocks meet the bottoms of grooves, can suppress irregular abrasion of the tread, can enhance the overall rigidity of the tread, and can also enhance the drainage performance. The pneumatic tire of the invention includes a tread with a large number of blocks compartmentalized by grooves (101) being formed on the surface of the tread (10), and also includes reinforcing ribs (20) that are positioned inside a groove and have their lower parts joined with the bottom of the groove, with one lateral surface of a reinforcing rib (20) and one side wall of the groove being in contact.
摘要:
The present invention relates to a molding material for a fuel cell separator including a graphite complex having a mixture of expandable graphite and non-expandable graphite; at least one of the conductive fillers selected from the group consisting of carbon black, carbon fiber and carbon nanotube; and at least one resin selected from a thermoplastic resin and thermosetting resin. With the present invention, both the mechanical strength and electrical conductivity of the fuel cell separator can be simultaneously improved.
摘要:
Disclosed is an extrusion mold for tire treads that extrudes semi-finished tires, for example, a cap tread, a wing tread and a sub tread. The preformer includes a first preformer die-holder (4) having a wing tread flow-path (1), a cap tread flow-path (2) and a sub tread flow-path (3) formed therein, a second preformer die-holder (6), and a final die (5) inserted into the second preformer die-holder and ejecting an extrudate. The improvement of the preformer die includes a middle upper preformer die (7a) and a middle lower preformer die (7b) between the first and second preformer die-holders (4, 6) to be brought into contact with the final die (5). The middle upper preformer die (7a) is formed with a wing tread-connecting guide groove (1a) and a cap tread-connecting guide groove (2a) communicating with the wing tread flow-path (1) and the cap tread flow-path (2), respectively. The middle lower preformer die (7b) is formed with a sub tread-connecting guide groove (3a) communicating with the sub tread flow-path (3).