Double-screw PP plate extrusion production system

Abstract

The utility model relates to a double-screw PP (polypropylene) plate extrusion production system, which comprises a feeding device, a motor, an extrusion unit, a calendaring device, a traction unit, a transverse cutting device and a discharging device, the extrusion unit is provided with a screw, a melt pump, a die head and a cooling water pipe, the cooling water pipe is arranged on one side of the screw, the die head is arranged at the outlet end of the extrusion unit, and the motor is connected with the motor. The screw rod is communicated with the die head through a melt pump; the motor is electrically connected with the extrusion unit, the transverse cutting device is arranged on one side of the extrusion unit, the feeding device is arranged on the extrusion unit, and the traction unit, the transverse cutting device and the discharging device are sequentially arranged on one side of the calendaring device in the moving direction of materials. According to the production system disclosed by the utility model, the calendering device is arranged at the die head of the extrusion unit, so that an extruded material can be extruded into a PP plate according to actual requirements, the temperature of the screw rod is set through the PLC control system of the extrusion unit in the use process, the cooling water pipe is automatically opened to cool the screw rod when the set temperature is exceeded, and the automation degree is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of plastic plate processing equipment, and specifically relates to a double screw PP plate extrusion production system. BACKGROUND

[0002] Polypropylene sheet (PP) is a kind of widely used high molecular plate, has high hardness, the characteristics such as bending fatigue resistance and good heat resistance, and PP foam board extrusion industry develops rapidly while PP foam board is in short supply.In the extrusion industry, due to the advantages of double screw extruder, such as large extrusion force, large shear force and direct molding for powder, it is widely used in the extrusion field of plastic products such as pipe, profile, plate and sheet.

[0003] The pressure of the head of the double screw extruder is collected by the sensor to the instrument or monitor for monitoring, and the size of the head pressure is determined by the feeding speed and the main machine speed given by the operator manually, the pressure fluctuation is large, which leads to the uneven rate of extruded material, greatly reduces the product quality, due to the fluctuation of pressure, in the film, sheet extrusion and other profile extrusion industry, furthermore, the control of the melting heating temperature of the double screw extruder in the extrusion process is weak, most of which cannot control the temperature in the predetermined range in time, thus leading to the fact that the parallel double screw extruder is not widely used in the field of PP foam board extrusion. UTILITY MODEL CONTENT

[0004] In order to overcome the shortcomings and deficiencies in the prior art, the purpose of the utility model is to provide a double screw PP plate extrusion production system, which can extrude the extruded material into PP plate according to the actual demand by setting the calendering device at the die head of the extruder set, and set the screw temperature through the PLC control system of the extruder set during use, when the actual temperature of the screw exceeds the set temperature, the cooling water pipe is automatically opened to cool the screw, so that the actual temperature of the screw is within 2 DEG C of the set temperature, and the extrusion molding of the PP plate is realized, which has high automation degree, reasonable process setting and good finished product quality.

[0005] The utility model discloses a double screw PP plate extrusion production system, including feeding device, motor, extruder unit, calendering device, traction unit, transverse cutting device, discharging device, the extruder unit is equipped with screw, melt pump, die head and a plurality of cooling water pipes, the cooling water pipe evenly sets up in one side for the screw cooling of screw, the die head sets up the export end of extruder unit, the junction of screw and die head passes through melt pump intercommunication, the motor with extruder unit electricity is connected, the transverse cutting device sets up one side close to die head of extruder unit, the feeding device sets up the feed port of extruder unit, and the traction unit, transverse cutting device, discharging device are arranged in the one side of calendering device in proper order along the trend of material.

[0006] Further, the traction unit includes a first traction machine, a second traction machine, and a cooling bracket. The first traction machine is located near the calendering device, and the second traction machine is located near the transverse cutting device. The cooling bracket is arranged between the first traction machine and the second traction machine.

[0007] Further, the production system further comprises a heating stirring barrel. The heating stirring barrel is located on one side of the extruder unit, and the feeding device and the heating stirring barrel are connected by a pipeline.

[0008] Further, the feed inlet of the extruder unit is further provided with a stock bin. A material guide roller is arranged in the stock bin. The material guide roller extends through the stock bin to the inside of the extruder unit.

[0009] Further, the calendering device is provided with three groups of compression rollers. The compression rollers are arranged in the calendering device from top to bottom. A gap is arranged between two adjacent compression rollers. The gap between the two compression rollers near the die head is opposite to the discharge port of the die head.

[0010] Further, the discharging device comprises a machine base, a lifting mechanism, a suction cup mechanism, a transverse driving mechanism, and a material loading platform. The material loading platform is arranged on the machine base. The lifting mechanism is arranged on the upper end surface of the machine base. The suction cup mechanism is connected to the lower end of the lifting mechanism. The lifting mechanism can drive the suction cup mechanism to move upward or downward in the vertical direction. The transverse driving mechanism is arranged on the upper end surface of the machine base. The transverse driving mechanism can drive the lifting mechanism to move transversely along the upper end surface of the machine base.

[0011] Further, the lifting mechanism comprises a mounting frame, a driving motor, and a plurality of telescopic shafts. The driving motor is arranged in the mounting frame. The telescopic shafts are sleeved in the mounting frame. The driving motor can drive the telescopic shafts to move up and down. The suction cup mechanism is fixed to the lower end of the telescopic shaft.

[0012] The utility model discloses an extrusion production system of PP board material has the advantages that the extrusion production system of PP board material of the utility model can extrude extrusion material into PP board material according to actual demand through setting the calendering device at the die head of extruder set, and through the PLC control system of extruder set, setting screw temperature in the use process, when the actual temperature of screw exceeds the set temperature, the cooling water pipe opens automatically and can cool screw, makes the actual temperature of screw and the set temperature differ within 2 DEG C range, and then realizes the extrusion forming of PP board material, and the degree of automation is high, and the process setting is reasonable, and the finished product quality is good. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is the perspective view of the utility model;

[0014] Figure 2 is the structure schematic view of the calendering device of the utility model;

[0015] Figure 3 is the structure schematic view of the blanking device of the utility model

[0016] Figure 4 is the schematic view of partial control system of the utility model.

[0017] The figure mark is: 1 - heating stirring barrel, 2 - feeding device, 3 - motor, 4 - extruder set, 41 - screw, 42 - melt pump, 43 - die head, 44 - cooling water pipe, 5 - calendering device, 51 - compression roller, 52 - gap, 6 - first traction machine, 7 - second traction machine, 8 - cooling bracket, 9 - blanking device, 91 - machine base, 92 - lifting mechanism, 921 - mounting frame, 922 - drive motor, 923 - telescopic shaft, 93 - sucking disc mechanism, 94 - transverse drive mechanism, 95 - object table, 10 - transverse cutting device, 11 - pipeline, 12 - stock bin and 13 - material guiding roller. DETAILED DESCRIPTION

[0018] In order to facilitate the understanding of those skilled in the art, the following is combined with the embodiment and the attached Figures 1-4 Further illustrate the utility model, the content mentioned in the implementation manner is not the limitation of the utility model.

[0019] See Figures 1-4The utility model discloses a double screw PP plate extrusion production system, including feeding device 2, motor 3, extruder set 4, calendering device 5, traction machine set, transverse cutting device 10, discharging device 9 and heating agitator tank 1, the extruder set 4 is equipped with screw 41, melt pump 42, die head 43 and a plurality of cooling water pipes 44, the cooling water pipe 44 is evenly set in one side of screw 41 for cooling screw 41, the die head 43 sets up the export end of extruder set 4, the junction of screw 41 and die head 43 is communicated through melt pump 42, the motor 3 with extruder set 4 electricity is connected, the transverse cutting device 10 sets up one side of extruder set 4 close to die head 43, the feeding device 2 sets up the feeding port place of extruder set 4, along the trend of material in proper order with traction machine set, transverse cutting device 10, discharging device 9 set up one side of calendering device 5, the heating agitator tank 1 is located one side of extruder set 4, and the feeding device 2 with heating agitator tank 1 is communicated through pipeline 11.

[0020] In the embodiment, the feeding port of the extruder set 4 is also provided with a material bin 12, the material bin 12 is provided with a material guide roller 13, and the material guide roller 13 extends through the material bin 12 to the inside of the extruder set 4.

[0021] The PP plate extrusion production system in the embodiment can extrude the extruded material into PP plates according to actual needs by arranging the calendering device 5 at the die head 43 of the extruder set 4. In use, the temperature of the screw 41 can be set through the PLC control system arranged in the extruder set 4. When the actual temperature of the screw 41 exceeds the set temperature, the cooling water pipe 44 is automatically opened to cool the screw 41, so that the actual temperature of the screw 41 is within a range of 2℃ from the set temperature, and the extrusion molding of the PP plate is realized. The degree of automation is high, the process setting is reasonable, and the quality of the finished product is good. In addition, the PLC control system arranged in the extruder set 4 can also control the melt pressure. When the actual pressure is lower than the set pressure, the PLC control system can adjust the feeding speed and the screw 41 to be accelerated. When the actual pressure is higher than the set pressure, the PLC control system can adjust the feeding speed and the screw 41 to be slowed down, so as to realize full-automatic mass production and improve the production efficiency. Specifically, in production, the PP raw material and the PP flame-retardant master batch to be produced are mixed in the heating and stirring barrel 1 according to a proportion, and then the raw material in the heating and stirring barrel 1 is sucked into the silo 12 through the feeding device 2 (the feeding device 2 is preferably a vacuum feeding machine), and the raw material is extruded into the extruder set 4 through the guide roller 13 arranged in the silo to be heated, melted and screw extruded, so as to improve the automation of the production line and save the labor cost. The temperature of the screw 41 is set through the PLC control system of the extruder set 4, and the screw 41 is heated to a range of 140-200℃ (if the temperature of the screw 41 is too high, the electromagnetic valve of the cooling water pipe 44 can be controlled, the ball valve of the cooling water pipe 44 is automatically opened, the screw 41 is cooled, and thus the temperature of the screw 41 is reduced), the raw materials are heated and melted, and are extruded through the arranged die head 43. The PLC system of the extruder set 4 can control the rotating speed of the screw 41, the rotating speed of the guide roller 13 and the rotating speed of the melt pump 42. The melt pump 42 is arranged to stabilize the pressure, control the speed of the extruded material, and thus improve the quality of the extruded product. The extruded material passes through the die head 43 to obtain a sheet extruded plate (the size of the extruded plate can be adjusted according to the mold of the press), and the extruded plate is further extruded to limit the thickness of the extruded plate through the calendering device 5 after passing through the die head 43. The extruded plate is conveyed forward to the transverse cutting device 10 through the traction set, the length of the extruded plate is cut by the transverse cutting device 10 according to the size of the mold of the press, and finally the extrusion process is completed by sucking and discharging the material through the discharging device 9.

[0022] In the embodiment, the traction set includes a first traction machine 6, a second traction machine 7 and a cooling bracket 8. The first traction machine 6 is located on one side close to the calendering device 5, the second traction machine 7 is located on one side close to the transverse cutting device 10, and the cooling bracket 8 is arranged between the first traction machine 6 and the second traction machine 7.

[0023] The traction unit of the embodiment is provided with a first traction machine 6, a second traction machine 7 and a cooling bracket 8. The plate material passing through the calendering device 5 is first conveyed to the cooling bracket 8 by the first traction machine 6, and the extruded plate is cooled by being dragged by the cooling bracket 8, and then conveyed to the second traction machine 7. The second traction machine 7 is used to convey the cooled plate material to the transverse cutting device 10 for cutting, so that the automation of the system is realized, and the labor cost is saved.

[0024] In the embodiment, the calendering device 5 is provided with three groups of compression rollers 51, which are arranged in the calendering device 5 from top to bottom in sequence. A gap 52 is left between two adjacent compression rollers 51 (the size of the gap 52 can be adjusted according to actual needs, so as to ensure that the width and thickness of the plate material are consistent), and the gap 52 between the two compression rollers 51 close to the die head 43 is opposite to the discharge port of the die head 43.

[0025] In the embodiment, the discharging device 9 includes a base 91, a lifting mechanism 92, a suction disc mechanism 93, a transverse driving mechanism 94 and a loading platform 95. The loading platform 95 is arranged on the base 91. The lifting mechanism 92 is arranged on the upper end surface of the base 91. The suction disc mechanism 93 is connected to the lower end of the lifting mechanism 92, and the lifting mechanism 92 can drive the suction disc mechanism 93 to move upward or downward in the vertical direction. The transverse driving mechanism 94 is arranged on the upper end surface of the base 91, and the transverse driving mechanism 94 can drive the lifting mechanism 92 to move transversely along the upper end surface of the base 91.

[0026] In the embodiment, the plate material cut by the transverse cutting device 10 is conveyed to the loading platform 95. The lifting mechanism 92 drives the suction disc mechanism 93 to descend and suck the plate material. The lifting mechanism 92 is reset to drive the plate material to rise. Then the transverse driving mechanism 94 drives the lifting mechanism 92 and the suction disc mechanism 93 to move transversely synchronously, so as to move the plate material to the discharging area and put it into the tray to complete the discharging. The lifting mechanism 92 and the suction disc mechanism 93 perform the next round of discharging operation, so as to improve the working effect of the system.

[0027] In the embodiment, the lifting mechanism 92 includes a mounting frame 921, a driving motor 922 and a plurality of telescopic shafts 923. The driving motor 922 is arranged in the mounting frame 921. The telescopic shafts 923 are sleeved in the mounting frame 921, and the driving motor 922 can drive the telescopic shafts 923 to move up and down. The suction disc mechanism 93 is fixed to the lower end of the telescopic shaft 923. When the lifting mechanism 92 works, the driving motor 922 drives the telescopic shaft 923 to move in the vertical direction, so as to drive the suction disc mechanism 93 fixedly connected with the telescopic shaft 923 to move up and down, thereby realizing the suction, transfer and discharging of the plate material placed on the loading platform 95.

[0028] The above embodiment is a preferred implementation scheme of the present application, in addition to this, the present application can be implemented in other ways, and any obvious replacement without departing from the concept of the present application is within the protection scope of the present application.

Claims

1. A twin-screw PP sheet extrusion production system, characterized in that: The production system comprises a feeding device, a motor, an extruder set, a calender device, a traction machine set, a transverse cutting device, and a discharging device. The discharging device comprises a machine base, a lifting mechanism, a suction cup mechanism, a transverse driving mechanism, and a carrier table. The lifting mechanism comprises a mounting frame, a driving motor, and a plurality of telescopic shafts.

2. The twin-screw PP plate extrusion production system according to claim 1, characterized in that: The traction machine set comprises a first traction machine, a second traction machine, and a cooling bracket.

3. The twin-screw PP plate extrusion production system according to claim 1, characterized in that: The production system further comprises a heating and stirring barrel.

4. The twin-screw PP plate extrusion production system according to claim 1, characterized in that: The extruder set is provided with a screw rod, a melt pump, a die head, and a plurality of cooling water pipes.

5. The twin-screw PP plate extrusion production system according to claim 1, characterized in that: The calender device is provided with three groups of compression rollers. The two compression rollers on the side close to the die head are arranged opposite to the discharge port of the die head.

Images