ZhongBo Industry and Mining Machinery Co.,Ltd is mainly engaged in conveyor belt, roller, roller, electric roller, support research and development, manufacture and sales. Leading products are the common conveyor belt, heat resistant conveyor belt (high temperature), acid and alkali resistant conveyor belt, oil resistant conveyor belt, cold resistant, wear resistant conveyor belt, flame retardant conveyor belt conveyor belt of different properties, such as cotton canvas conveyor belt (CC), nylon (NN) conveyor belt, polyester (EP) conveyor belt and flat belt with large Angle gear side of conveyor belt, pattern conveyor belt, conveyor belt. And the roller, roller, stents, such as electric roller conveyor accessories. Drive roller, redirection roller, electric roller, magnetic roller, magnetic roller), roller, stents, lug, tensioning device, sweeper, coupling and other TD75, DTII type conveying machinery and more than 200 kinds of products. To introduce the following conveyor belt appeared clear scar, foaming, ditches, or the cause of the tear.
Ming scar, foaming, ditches, or several kinds of phenomenon, is a conveyor belt defects such as cleft if defects seriously affect the use of the conveyor belt and life. This kind of appearance quality will not only give users a poor first impression, and gave the fame of the confession. What are then the reasons of these phenomena?
A, Ming scar: Ming scar is refers to the coating surface local micro concave or convex.
1. The cover rubber of mixing rubber plasticity is low or uneven mixing can cause rubber illiquid and cause scars.
2. Cover gum tablet when type rubber refining temperature and hot plasticity should agree, otherwise it will cause uneven film thickness and scar.
3. The strip after joint cover glue can not fall to the ground, should be hung up on the hob, in order to reduce the huge embossed scar. Strictly control the molding core width, in order to prevent the strip produced super wide consequent wellie wen Ming scar.
4. The curing time (slow pressure) with the quadratic pressure method, to eliminate tablets and with the gas.
Second, the blister
Covering plastic blister: 1. The covering plastic blister refers to cover with cloth layer between local bubbles off phenomenon.
(1) cover glue in tablet form, make the film bubble easily roller temperature is too high. Greater than 3 mm film thickness, rolling speed to control within the 20 m/s advisable, this helps to film bubble out.
(2) the rubber cover in forming joint, to level off, and make it through the roll gap pressure and has a certain pressure, to air out. Still must ensure to use film not sticky mud and other debris. 2. Canvas layer foaming: canvas blister refers to the cloth layer between local bubbles off phenomenon.
Canvas moisture content after drying of (1) shall not be greater than 3.5%. During the rainy season, the period of high humidity, canvas moisture content shall not be greater than 2.5%. The rags when rubbing stick glue into the canvas and broken yarn to keep clear of in time, lest cause foaming adhesive on the canvas.
(2) forming the tape if there is a thief, crushed, the phenomenon such as oil pollution, the treatment should be made before use. When dealing with these problems it is important to pay special attention to the coating of the mucilage and gasoline to dry.
(3) sulfide clamping in tablet every Angle place is due to see when the mold; Avoid mold belt of overlapping and cause foaming.
Three, ditches or tear: tape appeared on both sides of the trench is called ditches; Called tear tape on both sides appear cracks.
1. Laminated type USES mostly fabric core conveyor belt forming process, the forming and cutting cloth to keep the width of each layer of canvas is consistent and joint and tidy, otherwise once the edge glue with core side out of the groove, the sulfide out ditch phenomenon.
Before 2. Joint cover glue, the side adhesive must be solid pressed firmly embedded, in order to prevent sulfide kept inside the air can't discharge.
3. Sulfide when the strip into the mold before check whether tightly embedded and while department whether lack of glue, if there is any phenomenon, should besmear again after the completion of repair mold release agent, so as not to strip and the belt core and infiltration between the mold release agent caused the crack.
4. Should observe the size of the drain side when sulfide, select the appropriate mode of synthesis of slot width in order to ensure appropriate compression ratio.