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Techniques to vulcanize conveyor belt
Author:admin Source:Original Updated:2013-9-14

We all know that belts made ​​out to be made ​​of vulcanized joints can be put into use the ring , which use the vulcanizing machine, good curing techniques tend to make more durable belt . Let me just tell you about the conveyor belt vulcanizing ingenuity, to increase belt life.
       
Know vulcanized rubber conveyor belt vulcanizing skills first and foremost needs to grasp the nature and impact of the elements of vulcanization , curing conditions and implementation of measures to determine , vulcanizing machine operation practices, programs , during vulcanization is definitely temperatures and pressures hour , mixed mixing the crosslinking linear molecules to form three-dimensional network planning process , vulcanized rubber, plastic lower flexibility to add, to resist deformation of the talent greatly increasing the force and the travel of the other physical and chemical functions, the rubber becomes as with the use of value engineering property data, vulcanized rubber products processing end a process , the quality of the vulcanizates vulcanization function of great impact, therefore , should be seriously grasp the curing conditions , vulcanizing machine two pressurized hot plate surface should be mutually parallel , optional hot plate heating or electric heating steam , flat throughout vulcanization process, the mold cavity area is not less than the pressure exerted on three MPa , regardless of the use of any type of hot plate variety , the temperature distribution of the mold area probably uniform, the same hot plate between each point and the temperature difference between the center point and the maximum not more than once , the adjacent two cubicles its corresponding point of the compass temperature does not cross once , at the center of the hot plate maximum temperature span 0.5 degrees , common technical standards for the maximum closure pressure two hundred tons , the plunger stroke is two hundred millimeters , flat area of ​​five hundred by five hundred millimeters , the job number of layers of a layer , the total heating power is twenty-seven kilowatts ;
        
Vulcanization experimental operation , the film shall rule after kneading parked twenty-four hours before the vulcanization pieces , pieces of their way to pull such a sheet or strip specimens used in the experiment with scissors on the rubber pieces, rubber belt width direction of the specimen and the rubber compound to the rolling direction together , the volume of rubber mold should be slightly larger than the volume of its components weighing scales , plastic billet quality accounting in accordance with the following approach : plastic mold billet quality is equal to cavity volume multiplied by the density multiplied by one five rubber , vulcanization molding to ensure a satisfactory amount of glue , rubber internship with accounting than the amount then add five percent will be cut after a good edge in the rubber blanks posted good numbers and curing conditions labels , other films take about two millimeters in height of the specimen width , according to the direction of rolling straight cut strips, roll into a cylinder to be , and the volume of the cylinder to close , can not have vacancies, the cylinder volume is slightly smaller than the mold cavity , the cavity height is higher than the bottom of the cylinder number and curing conditions attached to the surface of the paper label , and then follow the needs of the plastic film material cut circular specimen , if the thickness is not , the film can be stacked together, the volume should be slightly larger than the volume of the cavity in the bottom of a circular sample number and the curing conditions paste paper labels , on-demand control of curing temperature schedule and good plate temperature , so that stable , the mold is closed on the plate is preheated to the negative rule vulcanization temperature was within the program , and at this temperature for twenty minutes adhere , can not preheat the successive curing , curing time each only allowed to put a hot plate mold vulcanizing machine operation, curing pressure supplied by the pump , curing pressure by the pressure gauge , pressure by the pressure control valve uneven scheduling, will check the number and condition of vulcanized rubber billet to speed quickly put into a preheated mold , mold immediately , placed flat center of the upper and lower layers of vulcanized model is in the same position after pressuring tablet rise, when the pressure gauge to the required operating pressure, the appropriate relief row gas about three to four times , and then the pressure reached the maximum start accounting vulcanized hour, arrived in the curing mold booking Kai hour relief immediately , remove the sample for new vulcanizing machine, mold , exhaust, vulcanization mold hour and Kai were for the automatic control of the vulcanized rubber belt sample cut edge , parked ten hours at room temperature after the inspection function can be carried out ;
Has determined that the formulation of the plastic material , the impact elements of the quality of vulcanized rubber has three aspects : curing pressure , also known as vulcanization temperature and vulcanization hour three elements of the rubber vulcanization process, the intention of applying pressure data , that the plastic active material in the mold cavity , covered with grooves or markings, avoiding bubbles or showing lack of plastic appearance, marching fine rubber materials , enhanced rubber with cloth or metal layer adhesion strength ; contribute to advancing the physical and mechanical rubber functions such as tensile function, abrasion resistance, flex resistance, aging , etc., are usually based on the plasticity of rubber compound , rubber belt sample product plan to pick the specific circumstances , for example, large plastic , the pressure should be smaller ; thickness large , multi-layered , program messy probably bigger pressure , curing temperature directly affects the curing reaction rate and the quality of curing , curing temperature of the curing speed is very significant , that is traveling with the curing temperature can be accelerated body vulcanization rate , resulting in a brief but high-temperature rubber molecular chain cleavage , and then vulcanized rehabilitation occurs , resulting in reduced mechanical function , it is not too high curing temperature , curing temperature should be based on a suitable rubber formulations may be, depending on the rubber during primary species and cure systems , the rubber is vulcanized hour formulation and curing temperature selected on a given plastic material , in curing a certain temperature and pressure conditions there is a most suitable vulcanization hour, hour too long, too short will affect the function of vulcanized rubber , vulcanized suitable selection of the hour we can go through the instrument to be measured .


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