CN201516660U

CN201516660U - Pre-vulcanizing retreading equipment for large-sized off-the-road tire

Info

Publication number: CN201516660U
Application number: CN2009201647901U
Authority: CN
Inventors: 杨得兵
Original assignee: China National Tyre and Rubber Guilin Co Ltd
Current assignee: China National Tyre and Rubber Guilin Co Ltd
Priority date: 2009-11-04
Filing date: 2009-11-04
Publication date: 2010-06-30
Anticipated expiration: 2019-11-04

Abstract

The utility model relates to pre-vulcanizing retreading equipment for large-sized off-the-road (OTR) tires. A circular ring with a hollow inner cavity is formed in a mold after mold matching, the inner cavity is matched with the tire tread and the tire shoulder of a tire, and the surface of the inner cavity is smooth and not provided with pattern blocks. The equipment also comprises two clamping plates. Each clamping plate comprises two pressing plates and two central tubes fixedly connected therewith. The two pressing plates are provided with opposite through holes, the two central tubes are inserted into a felly mounting hole at the center of the tire from the upper side and the lower side respectively, the two pressing plates press and cover the upper tire bead and the lower tire bead of the tire, and clamping bolts are passed through the two pressing plates and fastened by nuts. The air nozzles of the clamping plates are connected with an air compressor. During usage, the tire is retreaded and vulcanized by tightly jointing the tire with the pre-vulcanized tread rubber, mounting the clamping plates to close the inner cavity of the tire, loading the tire, matching the mold, heating the vulcanizing mold, and pressurizing the interior of the tire through an air nozzle. The pre-vulcanizing retreading equipment only heats the top and shoulder parts of the tire, so as to avoid damage of the tire body. The retreated tire has good wear resistance, puncture resistance and cutting resistance, and has stable appearance quality. The pre-vulcanizing retreading equipment dispenses with a felly, a vulcanizing envelope and an inner tube, so as to reduce consumption.

Description

Large off-the-road (OTR) tire prevulcanization retreading equipment

(1) technical field

The utility model relates to tyre retreading technique, is specially a kind of large off-the-road (OTR) tire prevulcanization retreading equipment.

(2) background technology

The develop rapidly of mining activities both at home and abroad in recent years improves year by year to the demand of large-scale engineering machinery tire, and the renovation of big machinery engineering tyre is also risen day by day, and many companies and scientific research institution have begun the research of this respect.

At present the ripe method of large-scale engineering machinery method for renovating tyre mainly adopts modelling heat to turn over, and the main feature of this method has: technology is simple, product appearance is near new tyre, product size precision height.But modelling heat is turned over and had following shortcoming: 1. mould need be processed pattern block, and processing cost height, and same equipment replacement sulfurizing mould also can only vulcanize with a series of several specification tires, bigger cost; 2. the carcass of retreads is high temperature vulcanized through twice, and carcass is aging fast, has a strong impact on the service life of retreads; 3. wear-resisting, anti-cutting of retreads and anti-thorn poor performance.

Well-known cold the turning over of presulfurization can solve all shortcomings that heat is turned over, be several times that heat is turned over the service life of tire, but the large-scale engineering machinery tire is because bulky, adopt the renovation of traditional envelope presulfurization method to have following difficult point: 1. the envelope that does not have the large-scale engineering machinery tyre rebuilding to use at present, make envelope specially for this reason specially and must promote cost; But also having the loss problem of envelope, cost more will significantly rise; 2. the large-scale engineering machinery tire adopts the envelope method because tyre surface is thick, and limited to the tyre surface applied pressure, there is quality risk in product; 3. even make the spectacle case big envelope, envelope also is very difficult on the giant tire.Therefore have not yet to see the relevant report that the large-scale engineering machinery tire adopts the envelope prevulcanization retreading.

(3) utility model content

The purpose of this utility model provides a kind of large-scale engineering machinery tire prevulcanization retreading equipment, need not to use the envelope and the inner tube of a tyre, and the device fabrication cost is low, and loss is little.

Large-scale engineering machinery tire prevulcanization retreading equipment of the present utility model comprises the vulcanizer and the sulfurizing mould that is divided into upper and lower mould as main body, sulfurizing mould behind the matched moulds is formed with the annulus of hollow cavity, inner chamber partly matches with the crown for the treatment of retreads and tire shoulder, maximum inner diameter is slightly larger than and treats the retreads diameter at the bottom of the inner chamber, the inner chamber width is slightly larger than treats the retreads width, the inner chamber degree of depth is slightly larger than the distance for the treatment of retreads tyre surface top and sidewall, with treat that the contacted surface of internal cavity in retreads tyre surface top is a smooth surface, no pattern block.Also have two clamping disks, clamping disk comprises platen and affixed with it central tube, the diameter of central tube is less than treating retreads wheel rim installing hole diameter, the height of 2 clamping disk central tubes equals and treats 1/2 of rim width that retreads match, platen is vertical with the central shaft of central tube, the central shaft of central tube is through the center of platen, the diameter of platen is greater than treating retreads tyre bead diameter, there is the bcad seats that matches with the tyre bead for the treatment of retreads on the surface that platen contacts with tire, there is relative through hole at the center of two platens, the central tube of 2 clamping disks is treated the wheel rim installing hole at retreads center from inserting up and down respectively, the platen of 2 clamping disks respectively gland in the tyre bead up and down for the treatment of retreads, grip bolt passes the central through hole of 2 platens, nut fastening clamp bolt, fixing 2 clamping disks up and down.The valve that is interlinked to the outside in one of them clamping disk has, valve is connected with air compressor.

When large-scale engineering machinery tire prevulcanization retreading equipment of the present utility model used, cutting old tire tyre surface was removed stained tyre surface and is reached predetermined radial dimension earlier; Again the adaptive tread rubber after the presulfurization is fitted in through on the tyre surface that cuts.The central tube of 2 clamping disks respectively from the wheel rim installing hole at the tire center of inserting the tread rubber of having fitted up and down, the platen of 2 clamping disks respectively gland in the tyre bead up and down of tire, fastening 2 clamping disks of grip bolt and nut, clamping disk sealing tyre cavity.Adorn tire, matched moulds afterwards, adopt steam or deep fat that sulfurizing mould is heated, keeping temperature is 120 degree～145 degree, valve by clamping disk injects gases at high pressure in tire simultaneously provides tyre vulcanization required interior pressure, pressure is 0.5～1.0MPa, and the tyre surface that inner pressure of tire pushes up tire is pressed in the surface of internal cavity of sulfurizing mould, keeps cure time 3～4 hours, finish retreading vulcanizing, obtain retreads.

The advantage of the utility model large-scale engineering machinery tire prevulcanization retreading equipment is: 1, this equipment just heats tire top and shoulder, avoid injuring carcass, therefore have characteristics such as wear-resisting, the anti-thorn of traditional prevulcanization retreading tire, anti-cutting, have modelling heat simultaneously and turn over the same stable presentation quality; 2, adopt this equipment to need not to use wheel rim, envelope and the inner tube of a tyre, reduce consuming; 3, the sulfurizing mould inner surface does not have pattern block, and can change sulfurizing mould and clamping disk realizes that a machine vulcanizes multiple series and specification tire, compares the die cost that traditional modelling heat turns over and reduces greatly; 4, the compressed air of importing by the valve of clamping disk, can make inner pressure of tire reach desired value, assurance has enough pressure to tyre surface, tread rubber and tire are merged more steadily, ensure the quality of products, overcome envelope method prevulcanization retreading (mainly being large off-the-road (OTR) tire) and the quality problems that produce not enough tyre surface pressure.

(4) description of drawings

Fig. 1: the example structure schematic diagram of this large-scale engineering machinery tire prevulcanization retreading equipment;

Reference numeral is as follows:

1 vulcanizer; 2 sulfurizing moulds; 3 clamping disks; 4 valves; 5 tread rubbers; 6 tires;

7 grip bolts.

(5) specific embodiment

This large-scale engineering machinery tire prevulcanization retreading equipment embodiment comprises the vulcanizer 1 as main body, the sulfurizing mould 2 and the clamping disk 3 that are divided into upper and lower mould, as shown in Figure 1, its sulfurizing mould 2 is divided into upper and lower mould, become the annulus that hollow cavity is arranged behind the matched moulds, inner chamber partly matches with the crown and the tire shoulder of tire 6, maximum inner diameter is slightly larger than and treats retreads 6 diameters at the bottom of the inner chamber, the inner chamber width is slightly larger than treats retreads 6 width, the inner chamber degree of depth is slightly larger than the distance for the treatment of retreads 6 tyre surface tops and sidewall, and treats that the contacted surface of internal cavity in retreads 6 tyre surface tops is a smooth surface, no pattern block.Clamping disk 3 comprises platen and affixed with it central tube, the diameter of central tube is less than rim diameter, the height of 2 clamping disk 3 central tubes equals 1/2 of rim width, platen is vertical with the central shaft of central tube, the central shaft of central tube is through the center of platen, the diameter of platen is greater than treating retreads 6 tyre bead diameters, and there is the bcad seats that matches with the tyre bead for the treatment of retreads 6 on the surface that the platen of clamping disk 3 contacts with tire.There is relative through hole at the center of clamping disk 3 platens, the central tube of 2 clamping disks 3 respectively from insert the wheel rim installing hole treat retreads 6 centers up and down, the platen of 2 clamping disks 3 respectively gland on the tyre bead up and down for the treatment of retreads 6, grip bolt 7 passes the central through hole of 2 platens, nut fastening clamp bolt, fixing 2 clamping disks 3 up and down.The valve 4 that is interlinked to the outside in clamping disk 3 above being in has, valve 4 is connected with air compressor.

The foregoing description is the specific case that the purpose of this utility model, technical scheme and beneficial effect are further described only, and the utility model is not to be defined in this.All any modifications of within scope of disclosure of the present utility model, being made, be equal to replacement, improvement etc., all be included within the protection domain of the present utility model.

Claims

1. large-scale engineering machinery tire prevulcanization retreading equipment comprises the vulcanizer (1) as main body and is divided into the sulfurizing mould (2) of upper and lower mould, it is characterized in that:

Be formed with the annulus of hollow cavity behind described sulfurizing mould (2) matched moulds, inner chamber partly matches with crown and the tire shoulder for the treatment of retreads (6), maximum inner diameter is slightly larger than and treats retreads (6) diameter at the bottom of the inner chamber, the inner chamber width is slightly larger than treats retreads (6) width, the inner chamber degree of depth is slightly larger than the distance for the treatment of retreads (6) tyre surface top and sidewall, and treats that the contacted surface of internal cavity in retreads (6) tyre surface top is a smooth surface; Also have 2 clamping disks (3), clamping disk (3) comprises platen and affixed with it central tube, the diameter of central tube is less than the diameter for the treatment of retreads (6) wheel rim installing hole, the height of 2 clamping disks (3) central tube equals and treats 1/2 of rim width that retreads (6) match, platen is vertical with the central shaft of central tube, the central shaft of central tube is through the center of platen, the diameter of platen is greater than treating retreads (6) tyre bead diameter, there is relative through hole at the center of platen, the central tube of 2 clamping disks (3) is treated the wheel rim installing hole at retreads (6) center from inserting up and down respectively, the platen of 2 clamping disks (3) respectively gland in the tyre bead up and down for the treatment of retreads (6), grip bolt (7) passes the central through hole of 2 platens, nut fastening clamp bolt, fixing 2 clamping disks (3) up and down; The valve (4) that is interlinked to the outside in one of them clamping disk (3) has, valve (4) is connected with air compressor.

2. large-scale engineering machinery tire prevulcanization retreading equipment according to claim 1 is characterized in that:

There is the bcad seats that matches with the tyre bead for the treatment of retreads (6) on the surface that the platen of described clamping disk (3) contacts with tire.