The difference between a single screw granulator and a twin screw granulation machine

The difference of a concept

1. The main cylinder of single screw pelletizer adopts electric heating and water cooling to control the barrel temperature automatically. The core of the screw can be cooled by water (oil) to control the screw temperature. The head is equipped with a pressure sensor for measuring fusion temperature and melt pressure. The hot cutting, granulating auxiliary machine and rotating blade are driven by AC motor and variable frequency speed regulation, and the dehydrating and drying system is composed of centrifugal dehydrator, barrel vibrating screen, wind storage silo, etc.

2. The twin screw granulator is mainly used for the filling, blending, modification, addition, addition, chlorination, polypropylene and high water absorption resin processing of rubber and engineering resins; extrusion of the degradable masterbatch, polyamide polycondensation and polyurethane polymerization; the granulation of carbon powder and magnetic powder, the sheathing material of the cable, the sheath, the low smoke and halogen free flame retardant PVC The cable material and the preparation of various silane crosslinking materials are mainly used for scientific research and teaching. Two the difference between the principle of work 1,

Single screw granulator: the material passes through the feeding mouth, under the action of the rotating screw, it is rubbed into a mass and rolling along the snail groove. The material is further mixed and plasticized because of the shearing, compression and stirring of the screw. The temperature and pressure are gradually increased, showing the state of viscous flow, and passing the machine with certain pressure and temperature. Head, finally get the desired shape of the product.

2.

Twin screw granulation machine: the material of the production process is sent to the double cone feeder through the automatic hoist, and the material is forced to join the main screw. The material is mixed and plasticized under the effect of the compression and shearing and external heating of the screw. Temperature and pressure gradually increase, showing a viscous flow state, and at certain pressure through the nose, extrusion granulating, and finally get the desired shape of particles.

Three scope of application 1,

The single screw extruder is mainly used for the filling, blending, modification, addition, modification, addition, chlorination, polypropylene and high water absorption resin, the extrusion of the degradable masterbatch, polyamide polycondensation and polyurethane polymerization; the granulation of the carbon powder and magnetic powder, the insulation material of the cable, the sheath, the low smoke and halogen free flame retardant PVC The preparation of cable materials and various silane crosslinkages, etc.,

2.

The twin screw granulator is mainly used for the filling, blending, modification, addition, addition, chlorination, polypropylene and super absorbent resin, the extrusion of the degradable masterbatch, polyamide polycondensation and polyurethane polymerization; the granulation of the carbon powder and magnetic powder, the insulation material of the cable, the sheath, the low smoke and halogen free flame retardant PVC electricity The cable material and the preparation of various silane crosslinking materials are mainly used for scientific research and teaching.

Three matters of attention

Notices of a and single screw extruder

1, strictly prohibit the conversation between the unrelated personnel and the equipment operator. Only one person should operate the button instructions on the electronic control panel. 2, check the insulation effect of the wire circuit regularly, and pay attention to the warning contents on the machine warning card. 3, before the power distribution cabinet is not cut off, the non professional personnel are strictly forbidden to open the cabinet door; it is forbidden to adjust the cutting tools before the granulator is completely stationary. 4, when the movable parts and hopper are blocked, do not use the hand or the iron stick, but only use the plastic stick to handle carefully. 5, when exposed to high temperature parts, scald carefully; when kneading machine is working, strictly prohibit the upper part of the staff from entering the barrel to visit or pick materials.

6, in the work such as power failure should cut off the motor circuit and clean up the memory material in time, the material will affect the next production after carbonization.

7, when the machine fails, it is necessary to stop the operation of the machine within the first time and not to assert it on its own. And notify and wait for repair personnel to check maintenance or telephone guidance and maintenance.

8, to prevent all factors leading to machine damage and industrial accidents. Precautions of B and twin screw granulator

1, the main motor and the oil pump motor have electric interlock, that is, the motor of the oil pump does not start, the main motor can not start, the main motor does not stop, and the oil pump motor can not stop.

2, the main motor and feed motor have electrical chain, that is, the main motor does not start, the feeding motor can not start; the main motor of the feeding motor does not stop, the main motor can not stop.

3. The main motor control cabinet has over current protection. It has been set before factory. In addition, it also has a mechanical protection device, usually a nylon shear pin type safety coupling. When the torque is exceeded, the shear pin is cut off and the gearbox stops working. 4, when the head pressure exceeds the set alarm value, the material pressure alarm signal lights up and automatically stops. 5, raw materials produced by users are strictly forbidden to bring in any metal objects.

6. When the machine is running, it is forbidden to use metal objects to clean the material at the opening of the cylinder.

7, the loading and dismantling of the pressure sensor and the thermocouple of the material. When there is material in the machine head, the heater must be heated until the material is softened before installation and disassembly.

8. Circulatory water for cylinder cooling system, please use softened water or distilled water.

9, the screw can only be allowed to start at low speed (less than 20r/min), and the idle time does not exceed 2 minutes.