CN104002454A - Special extruder for surface glue of two-sided four-layered veneering whole-core inflaming retarding conveying belt - Google Patents

Abstract

The invention discloses a double-sided four-layer veneer special extruder for the whole core flame-retardant conveyor belt surface glue, which solves the problem that the existing device can only be single-layer veneer. On the top of the extruder, set the upper left extruder and the upper right extruder with the same structure through the upper extruder fixing bracket; extruder, the lower right extruder and then coat the outer covering rubber layer; the coating mold is a double-layer four-sided coating mold; the four reduction gearboxes are used in pairs in pairs, each with a frequency conversion motor driven. The inner layer of the conveyor belt prepared by the present invention is a buffer layer, which has good bonding performance with the belt core, good elasticity and plasticity; the outer layer is a wear-resistant layer, which has good friction performance, wear resistance and impact resistance; the thickness ranges from 8-24mm Adjustable, coating molds with different lip widths make the product width adjustable from 650mm to 2200mm; long life, good groove formation, covering glue is not easy to fall off, large friction coefficient, and large loading angle.

Description

A double-sided four-layer veneer whole core flame-retardant conveyor belt special extruder

technical field

The invention relates to a conveyor belt surface rubber extruder, more precisely, to a double-sided four-layer composite glue PVC/PVG whole-core flame-retardant conveyor belt special surface glue coating squeezing and extruding equipment.

Background technique

As coal mines require safety requirements such as flame retardant and antistatic for coal conveyor belts, the use of domestic PVC/PVC flame retardant conveyor belts has been widely promoted. After years of research and exploration by Chinese enterprises, the production and development level of the whole core flame retardant conveyor belt is at the advanced level in the world, which can meet the use requirements of coal mines. Over the years, the production of flame-retardant belts has gone through two stages: one is the production of whole-core PVC conveyor belts. The process is that the tape core impregnated with the paste is first plasticized in the oven, and after it comes out of the oven, two extruders are used to coat the heated and vulcanized PVC plastic on the surface of the tape core, and it is cooled, drawn, and crimped. finished product. Second, the production process of the whole-core PVG conveyor belt is the same as that of the PVC belt, but the coating material is a rubber-plastic composite material, which solves the problems of low surface elasticity and small friction coefficient. Most of the manufacturers of flame retardant tapes in the country adopt the new technology of continuous vulcanization. Recently, coal mines have put forward the requirements of large transport capacity and large inclination angle for the belt. We have conducted in-depth research on the use of the whole core flame-retardant conveyor belt for many years, and found that the single-layer laminated flame-retardant belt produced by the continuous vulcanization process There are some phenomena such as low service life, poor troughability of the conveyor belt due to the cold and brittleness of the plastic during winter use, the covering rubber is easy to fall off in pieces, the belt surface is smooth, the friction coefficient is small, the load angle is small, and the wear resistance and impact resistance are poor.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies of the prior art and provide a special extruder for double-sided four-layer veneer whole core flame-retardant conveyor belt surface rubber, which can not only produce in a continuous assembly line, but also realize the vulcanization of four-layer covering rubber at one time. Compact and well laid out.

The present invention comprises extruder guide rail, left lower extruder, right lower extruder, feed barrel, coating die, left lower extruder, right lower extruder are arranged on extruder guide rail, each extruder Both include extruder barrel, screw, feeding barrel, reduction gear box, heating system, cooling fan, frequency conversion motor; it is characterized in that the upper extruder is used to fix the bracket on the lower left extruder and the lower right extruder Set the upper left extruder and the upper right extruder, and the upper left extruder and the upper right extruder have the same structure as the lower left extruder and the lower right extruder; The belt core is coated with the inner buffer rubber layer, and the lower left extruder and the lower right extruder are coated with the outer covering rubber layer; the coating mold is a double-layer four-sided coating mold; the four Two sets of reduction gearboxes are used facing each other in groups, and each is driven by a variable frequency motor.

The feeding barrel of each barrel and screw is made of transparent polycarbonate material, and the feeding situation is clear at a glance, which avoids the quality problem of lack of glue on the belt surface of the product due to human-made lack of material.

Working principle: The barrel and screw of the upper left extruder and the upper right extruder can heat and extrude the plastic or rubber and plastic pellets into a molten state and push them to the machine head to be coated through the mold until they are plasticized. On the belt core of the conveyor belt, the inner buffer rubber layer is formed; similarly, the barrel and screw of the lower left extruder and the lower right extruder turn the plastic or rubber and plastic pellets into a molten state through heating and extrusion, and then change them through the mold. The finished film is coated on the inner layer of rubber to form the outer layer of covering rubber layer, and the double-sided four-layer veneer process is completed to realize the vulcanization and extrusion molding of the upper and lower layers of the conveyor belt.

It can be seen from the above technical scheme that the inner layer of the conveyor belt prepared by the present invention is a buffer layer, which has good bonding performance with the belt core, good elasticity and plasticity; the outer layer is a wear-resistant layer, which has good friction performance and impact resistance; the thickness ranges from 8-24mm adjustable, coating molds with different lip widths make the product width adjustable from 650mm to 2200mm; the conveyor belt product has a long service life, good groove formation, covering glue is not easy to fall off, large friction coefficient, and easy to load Large angle, strong wear resistance and impact resistance. the

Description of drawings

Accompanying drawing is the structural representation of the present invention.

In the figure, 1. Extruder guide rail, 2. Lower left extruder, 3. Upper left extruder, 4. Feeding barrel, 5. Double-layer double-sided coating mold, 6. Upper right extruder, 7. Right Lower extruder, 8. Upper extruder fixing bracket, 9. Conveyor belt core.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings.

As shown in the drawings, the present invention includes an extruder guide rail 1, a lower left extruder 2, a lower right extruder 7, a feeding barrel 4, a double-sided four-layer coating mold 5, and the like. The lower left extruder 2 and the lower right extruder 7 are set on the extruder guide rail 1, each extruder includes extruder barrel, screw, feeding barrel, reduction gear box, heating system, cooling fan, frequency conversion motor. Above the lower left extruder 2 and the lower right extruder 7, the upper left extruder 3 and the upper right extruder 6 are arranged through the upper extruder fixed bracket 8, the upper left extruder 3, the upper right extruder 6 and the lower left extruder Extruder 2 and the lower right extruder 7 have the same structure; the upper left extruder 3 and the upper right extruder 6 coat the inner buffer rubber layer on the conveyor belt core 9, and the lower left extruder 2 , The lower right extruder 7 coats the outer layer and covers the adhesive layer again. The coating mold is a double-layer four-sided coating mold 5 .

The four reduction gearboxes are used in pairs facing each other, and each is driven by a variable frequency motor to realize the start-up and operation of the four extruders at different speeds and frequencies, so as to realize the coating of rubber materials with different thicknesses. The feed barrel 4 of each barrel screw is made of transparent polycarbonate material.

Claims (1)

1. A special extruder for double-sided four-layer laminated whole-core flame-retardant conveyor belt surface glue, including extruder guide rails, left lower extruder, right lower extruder, feeding barrel, coating mold, left lower extruder The extruder and the lower right extruder are set on the guide rail of the extruder, and each extruder includes an extruder barrel, a screw, a feeding barrel, a reduction gear box, a heating system, a cooling fan, and a frequency conversion motor; it is characterized in that : On the lower left extruder (2) and the lower right extruder (7), the upper left extruder (3) and the upper right extruder (6) are set by the upper extruder fixing bracket (8), and the upper left extruder Extruder (3), upper right extruder (6) are identical in structure with left lower extruder (2), right lower extruder (7); Described left upper extruder (2), right upper extruder (7) ) Coating the inner buffer rubber layer to the conveyor belt core (9), the lower left extruder (3) and the lower right extruder (6) are coated with an outer covering rubber layer; The mold is a double-layer four-sided coating mold (5); the four reduction gearboxes are used in pairs facing each other, and each is driven by a variable frequency motor to realize the starting and running of the four extruders at different speeds and frequencies .