CN208020705U - A kind of new type single screw plastic extruder - Google Patents

Abstract

The utility model provides a novel single-screw plastic extruder, which includes a frame, a motor, a control box, a water tank, a water pump, a circulating water channel, a machine head, a filter plate, a protective cover, a heater, a temperature sensor, a hopper, a screw barrel, Screw and gearbox, the motor is located inside the frame; the gearbox is installed on the upper end of the frame, and is connected with the motor through a pulley; the screw barrel is located on the upper side of the frame, and the screw barrel A screw is installed on the inside, and the end of the screw is connected with the gearbox; the hopper is installed on the upper side of the screw barrel; the head is located at the end of the screw barrel, and there is a filter plate. The arrangement of the heater, the circulating water channel and the control box of the utility model realizes the collection and automatic adjustment of the internal temperature of the screw barrel, which is beneficial to the stability of the processing quality of the plastic products.

Description

A new type of single-screw plastic extruder

technical field

The utility model belongs to the technical field of plastic production equipment, in particular to a novel single-screw plastic extruder.

Background technique

The single-screw extruder is mainly used to extrude thermoplastics such as soft and hard polyvinyl chloride and polyethylene, and can process a variety of plastic products, such as blown film, extruded tube, press plate, ribbon, etc., and can also be used for melt granulation. The plastic extruder has advanced design, high quality, good plasticization, low energy consumption, and adopts involute gear transmission, which has the characteristics of low noise, stable operation, large bearing capacity and long service life. In plastic extrusion, the temperature control effect of the molten material directly affects the quality of the extruded product, such as the residual stress on the surface of the product, the shrinkage rate and the stability of the product quality. However, the existing single-screw plastic extruder has a complex temperature control circuit structure and a high failure rate. In addition, the temperature control meter adopts an intermittent temperature control method, so the temperature of each heating zone fluctuates greatly, and the processing quality of plastic products is difficult to stabilize. question.

Therefore, it is necessary to invent a kind of novel single-screw plastic extruder.

Utility model content

In order to solve the above technical problems, the utility model provides a new type of single-screw plastic extruder to solve the complex temperature control circuit structure and high failure rate of the existing single-screw plastic extruder. In addition, the temperature control meter is intermittent. Due to the temperature control method, the temperature of each heating zone fluctuates greatly, and the processing quality of plastic products is difficult to stabilize. A new type of single-screw plastic extruder, including frame, motor, control box, water tank, water pump, circulating water channel, machine head, filter plate, protective cover, heater, temperature sensor, hopper, screw barrel, screw and gearbox , the motor is located inside the frame; the gearbox is installed on the upper end of the frame, and is connected with the motor through a pulley; the screw barrel is located on the upper side of the frame, and a screw is installed inside the screw , the end of the screw is connected to the gearbox; the hopper is installed on the upper side of the screw barrel; the head is located at the end of the screw barrel, and a filter plate is arranged between the head and the screw barrel; The inside of the screw barrel and the head is provided with a temperature sensor, the outside is equipped with a heater, and the inside is processed with a circulating water channel, wherein the water inlet of the circulating water channel is connected to the water pump; the water tank is located at the water inlet of the water pump; the control The box is installed on the front side of the frame; the protective cover is located on the outside of the screw barrel; the control box includes a host computer, an analog input module, a controller, a digital output module and a solid state relay, and the host computer Located on the outside of the control box, the host computer is connected to the controller through a signal line; the controller is located on the inside of the control box; the analog input module is connected to the input terminal of the controller; the digital output module It is connected with the output terminal of the controller, and the output terminal of the digital quantity output module is connected with the solid state relay.

The heater adopts electric heating wire or electric heating sheet, and the electric heating wire or electric heating sheet is directly wound on the outside of the screw barrel, which is beneficial to the control of heating temperature.

The K-type thermocouple is selected as the temperature sensor. The K-type thermocouple has the advantages of good linearity, large thermoelectromotive force, high sensitivity, good stability and uniformity, strong oxidation resistance, and low price.

The upper computer adopts the man-machine monitoring interface installed with the configuration software WinCC6.05, and by connecting with the controller, the actual temperature of each heating section, the on-off state of the heater or the water pump, etc. can be displayed on the upper computer.

Described analog quantity input module adopts SM331, AI8*12 bits, and is connected with temperature sensor; Described digital quantity output module adopts SM322, D08*230VAC, and connects with heater, water pump through solid state relay.

The controller adopts the S7-3002 programmable controller of German SIMENS company as the control core; the temperature sensor transmits the detected barrel and head temperature signals to the analog input module to be read by the controller. The controller compares the read value with the set value, calculates according to the size of the deviation and the temperature control strategy, and obtains the control output, and controls the heating time of the heater or the working time of the water pump through the digital output module and the solid state relay. In this way, the collection and automatic adjustment of temperature can be realized, which is beneficial to the stable quality of plastic product processing.

Compared with the prior art, the utility model has the following beneficial effects:

1. The setting of the upper computer of the present utility model, the upper computer is equipped with the man-machine monitoring interface of the configuration software WinCC6. closed state etc.

2. The setting of the controller of the present utility model, by adopting the S7-3002 programmable controller of Germany SIMENS company as the control core, compares the heating time of the heater according to the numerical value of reading temperature sensor and setting value, Or the working time of the water pump, so as to realize the collection and automatic adjustment of temperature, which is conducive to the stable quality of plastic product processing.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is a structural schematic diagram of the control box of the present invention.

In the picture:

1-rack, 2-motor, 3-control box, 31-host computer, 32-analog input module, 33-controller, 34-digital output module, 35-solid state relay, 4-water tank, 5-water pump , 6-circulating water channel, 7-machine head, 8-filter plate, 9-protective cover, 10-heater, 11-temperature sensor, 12-hopper, 13-screw barrel, 14-screw, 15-gearbox.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described:

Example:

As shown in accompanying drawing 1 to accompanying drawing 2:

The utility model provides a novel single-screw plastic extruder, which includes a frame 1, a motor 2, a control box 3, a water tank 4, a water pump 5, a circulating water channel 6, a machine head 7, a filter plate 8, a protective cover 9, and a heater 10. Temperature sensor 11, hopper 12, screw barrel 13, screw rod 14 and gearbox 15, the motor 2 is located inside the frame 1; the gearbox 15 is installed on the upper end of the frame 1, and is connected to the motor 2 Connected by a pulley; the screw barrel 13 is located on the upper side of the frame 1, and the screw 14 is installed on the inside of the screw barrel 13, and the end of the screw rod 14 is connected with the gearbox 15; the hopper 12 is installed on the screw barrel 13; the head 7 is located at the end of the screw barrel 13, and a filter plate 8 is provided between the head 7 and the screw barrel 13; the inside of the screw barrel 13 and the screw barrel 7 is provided with The temperature sensor 11 is equipped with a heater 10 on the outside, and a circulating water channel 6 is processed inside, wherein the water inlet of the circulating water channel 6 is connected to the water pump 5; the water tank 4 is located at the water inlet of the water pump 5; the control box 3 is installed on the The front side of the frame 1; the protective cover 9 is located on the outside of the screw barrel 13; the control box 3 includes a host computer 31, an analog input module 32, a controller 33, a digital output module 34 and a solid state relay 35 , the host computer 31 is located on the outside of the control box 3, and the host computer 31 is connected to the controller 33 through a signal line; the controller 33 is located on the inside of the control box 3; the analog input module 32 is connected to the control box The input end of the controller 33 is connected; the digital output module 34 is connected with the output end of the controller 33, and the output end of the digital output module 34 is connected with the solid state relay 35.

The heater 10 adopts electric heating wire or electric heating sheet, and the electric heating wire or electric heating sheet is directly wound on the outside of the screw barrel 13, which is beneficial to the control of the heating temperature.

The temperature sensor 11 is a K-type thermocouple, which has the advantages of good linearity, large thermal electromotive force, high sensitivity, good stability and uniformity, strong oxidation resistance, and low price.

Described upper computer 31 adopts the man-machine monitoring interface that configuration software WinCC6. status etc.

Described analog quantity input module 32 adopts SM331, AI8 * 12 bits, and is connected with temperature sensor 11; Described digital quantity output module 34 adopts SM322, D08 * 230VAC, and through solid state relay 35 and heater 10, water pump 5 connect.

Described controller 33 adopts the S7-3002 programmable logic controller of German SIMENS company as control core; Described temperature sensor 11 transmits the temperature signal of barrel 13 and head 7 detected to analog quantity input module 32 by The controller 33 reads, and the controller 33 compares the read value with the set value, calculates according to the size of the deviation and the temperature control strategy, and obtains the control output, and controls the heater 10 through the digital output module 34 and the solid state relay 35 The heating time, or the working time of the water pump 5, so as to realize the collection and automatic adjustment of the temperature, which is conducive to the stable quality of plastic product processing.

working principle

In the utility model, the material is fed into the screw barrel 13 from the hopper 12, the motor 2 drives the screw 14 to rotate through the pulley and the gearbox 15, the material is continuously pushed and compacted, and under the action of strong shear, friction and external heating, After gradually melting, it is filtered, and then extruded from the head 7 at a certain pressure and flow rate; during the rotation of the screw 14, the temperature sensor 11 transmits the detected temperature signals of the barrel 13 and the head 7 to the analog input module 32 is read by the controller 33, the controller 33 compares the read value with the set value, calculates according to the size of the deviation and the temperature control strategy, obtains the control output, and controls the heating through the digital output module 34 and the solid state relay 35 The heating time of the device 10, or the working time of the water pump 5, so as to realize the collection and automatic adjustment of the temperature, which is conducive to the stable quality of plastic product processing.

Utilize the technical solution described in the utility model, or those skilled in the art design similar technical solutions under the inspiration of the technical solution of the utility model, and achieve the above-mentioned technical effect, all fall into the protection scope of the utility model .

Claims (6)

1. a kind of new type single screw plastic extruder, it is characterised in that：Including rack (1), motor (2), control cabinet (3), water tank (4), water pump (5), cyclic water channel (6), head (7), filter plate (8), protective cover (9), heater (10), temperature sensor (11), hopper (12), barrel (13), screw rod (14) and gearbox (15), the motor (2) are located at the inside of rack (1)；Institute The gearbox (15) stated is installed on the upper end of rack (1), and is connect by belt pulley with motor (2)；Described barrel (13) position Upside in rack (1) is equipped with screw rod (14) on the inside of the barrel (13), the end of the screw rod (14) with gearbox (15) even It connects；The hopper (12) is installed on the upside of barrel (13)；The head (7) is located at the end of barrel (13), and in machine Filter plate (8) is equipped between head (7) and barrel (13)；The inside of the barrel (13) and head (7) is equipped with temperature sensor (11), outside installation having heaters (10), inside is machined with cyclic water channel (6), the wherein water inlet and water pump of cyclic water channel (6) (5) it connects；The water tank (4) is located at the water inlet of water pump (5)；The control cabinet (3) is installed on the front side of rack (1)； The protective cover (9) is located at the outside of barrel (13)；

The control cabinet (3) includes host computer (31), Analog input mModule (32), controller (33), digital output mould Block (34) and solid-state relay (35), the host computer (31) are located at the outside of control cabinet (3), which passes through letter Number line is connect with controller (33)；The controller (33) is located at the inside of control cabinet (3)；The Analog input mModule (32) it is connect with the input terminal of controller (33)；The digital output module (34) and the output end of controller (33) connect It connects, the output end of the digital output module (34) is connect with solid-state relay (35).

2. new type single screw plastic extruder as described in claim 1, it is characterised in that：The heater (10) is using electricity Heater strip or electric heating sheets.

3. new type single screw plastic extruder as claimed in claim 2, it is characterised in that：Temperature sensor (11) choosing With K-type thermocouple.

4. new type single screw plastic extruder as described in claim 1, it is characterised in that：The host computer (31) is using peace Man-machine monitoring interface equipped with Configuration software WinCC 6.05.

5. new type single screw plastic extruder as described in claim 1, it is characterised in that：The Analog input mModule (32) SM331, AI8 × 12 are used, and are connect with temperature sensor (11)；The digital output module (34) uses SM322, D08 × 230VAC, and pass through solid-state relay (35) and heater (10), water pump (5) connection.

6. new type single screw plastic extruder as described in claim 1, it is characterised in that：The controller (33) uses moral The S7-3002 programmable controllers of SIMENS companies of state core in order to control.