Cooling structure at tail end of screw extruder

Abstract

The utility model discloses a screw extruder tail end cooling structure which comprises a machine frame, a sealing box is fixedly installed on the top of the machine frame, a discharging structure is fixedly installed in the sealing box, a heating box is fixedly installed at the position, located outside the discharging structure, in the sealing box, and a cooling structure is installed in the heating box. A temperature control shell is fixedly mounted at the other end of the top of the rack, a through opening is formed in the bottom of the temperature control shell, a material guide barrel penetrating through one side of the sealing box is fixedly mounted between the temperature control shell and the discharging structure, and a mounting groove is formed in the position, at the temperature control shell, of the top of the rack; and a mounting frame and a fan are fixedly mounted on the mounting groove. Cooling liquid in the cold water coil pipe is conveyed in a circulating mode, heat in the temperature measuring shell is reduced, meanwhile, the draught fan is started to accelerate the cooling effect on the outer wall of the discharging pipe, friction caused to the inner wall of the discharging pipe in the extrusion process is reduced, and the service life of the extruder is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model belongs to screw extruder technical field, concretely relates to a screw extruder end cooling structure. BACKGROUND

[0002] Screw spinning production flow polyester chip conveying is carried out to the crystallization, drying, melting, metering, spinning cooling, winding, inspection, packaging, and the screw extruder is used in the melting process to heat, dissolve and convey, the screw extruder heating is generally divided into five to six independent heating areas according to the screw size, each area can independently set temperature and control, and the temperature deviation is (±0.5 DEG C) according to the product variety process requirement setting value.

[0003] The utility model discloses a single screw extruder convenient to cool, which includes an extruder body, a cooling assembly for cooling plasticized material is arranged at the conveying end of the extruder body, and a drying assembly for drying the material after cooling is arranged at the side of the cooling assembly away from the extruder body, which has the effect of reducing the workload of workers. The above-mentioned utility model is provided with a cooling assembly for cooling plasticized material, but the cooling of the end portion always affects the ductility, and it cannot guarantee the cooling of the end portion according to the specific temperature. UTILITY MODEL CONTENT

[0004] In order to solve the above technical problems, the utility model provides a screw extruder end cooling structure, which comprises a rack, a sealing box is fixedly installed at the top of the rack, a discharging structure is fixedly installed inside the sealing box, a heating box is fixedly installed inside the sealing box outside the discharging structure, a temperature control shell is fixedly installed at the other end of the top of the rack, and a through hole is arranged at the bottom of the temperature control shell, a guide cylinder penetrating through one side of the sealing box is fixedly installed between the temperature control shell and the discharging structure, an installation groove is formed in the top of the rack at the position of the temperature control shell, and a mounting bracket and a fan are fixedly installed on the installation groove.

[0005] As a further preferred technical scheme of the utility model, the discharging structure comprises a hopper penetrating through the top of the sealing box, a feeding pipe installed at the bottom of the hopper, and a mounting cover fixedly installed at the top of the hopper through bolts, a feeding port is formed in the mounting cover, the feeding pipe is butt-jointed between the bottom and the guide cylinder, and two groups of infrared heating coils are fixedly installed outside the feeding pipe.

[0006] The feeding pipe is fed through the feeding port, and the polyester material in the feeding pipe is heated and melted to a specified temperature by the infrared heating coils during the feeding process.

[0007] As a further preferred technical scheme of the utility model, a group of cushion blocks are arranged between the bottom of the material guiding cylinder and the sealing box for fixed installation, two groups of hot water coil pipes are fixedly installed on the two groups of side walls in the heating box, the hot water coil pipes are connected and installed through the connecting pipes arranged on the bottom of the material guiding cylinder, and the other ends of the hot water coil pipes are connected and installed with the circulating conveying device through the sealing box.

[0008] The heat generated by the infrared heating coil is collected and circulated at the end position of the material guiding cylinder and the blanking structure through the circulation of the heat conducting medium in the hot water coil pipe, so that the heat loss is reduced and the melting state of the polyester material is ensured.

[0009] As a further preferred technical scheme of the utility model, two groups of threaded pushing rods are arranged in the material guiding cylinder and connected and installed with the inner wall of the material guiding cylinder through the fixed bearing at the end of the threaded pushing rod, a main shaft motor is fixedly installed on the top of the rack on one side of the sealing box, two groups of belt pulley groups driven by the main shaft motor are installed on the outer wall of the sealing box, the output ends of the belt pulley groups are rotatably connected with the sealing box and the threaded pushing rod, an installation frame is fixedly installed on the sealing box outside the belt pulley groups, and a sieve frame is fixedly installed on the top of the material guiding cylinder at the bottom of the feeding pipe.

[0010] When the molten polyester material is introduced into the material guiding cylinder, the molten polyester material is first screened out through the sieve frame to reduce the entry of large dust into the material guiding cylinder, the two groups of belt pulley groups are driven by the main shaft motor to rotate the two groups of threaded pushing rods to spirally guide the material out.

[0011] As a further preferred technical scheme of the utility model, a temperature measuring shell is arranged on the top of the temperature control shell, a discharging pipe is arranged on one end of the material guiding cylinder through the temperature measuring shell, a discharging port is arranged on one end of the discharging pipe, and a corresponding discharging hole is arranged on one end of the material guiding cylinder at the position of the discharging pipe.

[0012] The material guided out by the threaded pushing rod is guided into the discharging pipe through the discharging hole and extruded out of the discharging port, and in actual use, the material in the discharging hole and the discharging pipe is in a molten state, which has a relatively high heat, and the extrusion process will cause the pressure to increase, which will cause a relatively large friction to the discharging pipe in the extrusion process and aggravate the abrasion of the discharging pipe.

[0013] As a further preferred technical scheme of the utility model, a temperature detector is arranged on the temperature measuring shell, a cold water coil pipe is connected and installed between the inner walls of the temperature control shell at the bottom of the discharging pipe, and the cold water coil pipe is connected and installed with the conveying pump body through the temperature control shell at both ends.

[0014] The temperature sensor monitors the heat inside the temperature measuring housing. When the temperature exceeds the specified value, the electronic control system starts the delivery pump connected to the cold water coil to circulate the coolant inside the cold water coil and reduce the heat inside the temperature measuring housing.

[0015] Beneficial effects

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] 1. The temperature sensor monitors the heat inside the temperature measuring housing cavity. When the temperature exceeds the specified value, the electronic control system starts the delivery pump connected to the cold water coil to circulate the coolant inside the cold water coil, reducing the heat inside the temperature measuring housing. At the same time, the fan is started to accelerate the cooling effect on the outer wall of the discharge pipe, reducing the friction on the inner wall of the discharge pipe during the extrusion process and extending the service life of the extruder.

[0018] 2. When the molten polyester material is introduced into the feed cylinder, the molten polyester material is first screened out by the screen frame to reduce the possibility of large dust entering the feed cylinder. The main shaft motor drives two sets of pulleys to rotate two sets of threaded push rods to spirally discharge the material. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a cross-sectional structural diagram of the tail end of this utility model;

[0021] Figure 3 This is a cross-sectional structural diagram of the material feeding structure of this utility model;

[0022] Figure 4 for Figure 2 A magnified structural diagram of point A in the middle.

[0023] In the diagram: 1. Frame; 11. Mounting slot; 12. Mounting bracket; 13. Fan; 2. Main shaft motor; 21. Pulley assembly; 3. Sealing box; 31. Mounting frame; 32. Pad; 4. Feeding structure; 41. Hopper; 42. Mounting cover; 43. Feeding port; 44. Feeding pipe; 5. Guide cylinder; 51. Discharge pipe; 52. Discharge port; 53. Threaded push rod; 54. Fixed bearing; 55. Discharge hole; 56. Temperature detector; 57. Screen frame; 6. Heating box; 61. Hot water coil; 62. Connecting pipe; 7. Temperature control housing; 71. Temperature measuring housing; 72. Cold water coil; 8. Infrared heating coil. Detailed Implementation

[0024] The embodiment is a screw extruder end cooling structure.

[0025] The utility model discloses a cooling assembly for cooling plasticized material, but the end is cooled all the time, which can affect its ductility and cannot guarantee the cooling of the end according to the specific temperature.

[0026] The structural schematic diagram is shown in the figure. Figures 1-4 The screw extruder end cooling structure comprises a rack 1, a sealing box 3 fixedly installed on the top of the rack 1, a discharging structure 4 fixedly installed in the sealing box 3, and a heating box 6 fixedly installed in the sealing box 3 outside the discharging structure 4. The discharging structure 4 comprises a hopper 41 penetrating through the top of the sealing box 3, a feeding pipe 44 installed at the bottom of the hopper 41, and a mounting cover 42 fixedly installed at the top of the hopper 41. A feeding opening 43 is formed in the mounting cover 42. The bottom of the feeding pipe 44 is in abutment with a material guiding cylinder 5. Two groups of infrared heating coils 8 are fixedly installed outside the feeding pipe 44. The inside of the feeding pipe 44 is fed through the feeding opening 43. In the feeding process, the inside of the feeding pipe 44 has been heated to a specified temperature by the infrared heating coils 8, so that the polyester material fed into the feeding pipe 44 is heated and melted.

[0027] The bottom of the material guiding cylinder 5 is fixedly installed with the sealing box 3 through a set of cushion blocks 32. Hot water coils 61 are fixedly installed on two sets of side walls in the heating box 6, and the hot water coils 61 are connected and installed through a connecting pipe 62 installed at the bottom of the material guiding cylinder 5. The other end of the hot water coils 61 penetrates the sealing box 3 and is connected and installed with the circulating conveying device. The heat generated by the infrared heating coil 8 is collected and circulated at the end position of the material guiding cylinder 5 and the lower structure 4 through the circulation of the heat-conducting medium, so as to reduce the heat loss and ensure the melting state of the polyester material. Two sets of threaded push rods 53 are installed in the material guiding cylinder 5, and the end of the threaded push rod 53 is connected and installed with the inner wall of the material guiding cylinder 5 through a fixed bearing 54. The main shaft motor 2 is fixedly installed on the top of the rack 1 on one side of the sealing box 3. Two sets of belt pulley groups 21 driven by the main shaft motor 2 are installed on the outer wall of the sealing box 3, and the output end of the belt pulley group 21 penetrates the sealing box 3 and the threaded push rod 53 and is rotationally connected. The mounting frame 31 is fixedly installed on the sealing box 3 outside the belt pulley group 21. The sieve frame 57 is fixedly installed at the bottom of the feeding pipe 44 on the top of the material guiding cylinder 5. When the molten polyester material is introduced into the material guiding cylinder 5, the molten polyester material is first screened by the sieve frame 57 to reduce the entry of large dust into the material guiding cylinder 5. The two sets of belt pulley groups 21 are driven by the main shaft motor 2 to drive the two sets of threaded push rods 53 to rotate and spirally guide the material out. The temperature control shell 7 is fixedly installed on the other end of the top of the rack 1. The temperature measuring shell 71 is installed on the top of the temperature control shell 7. The discharge pipe 51 is installed at one end of the material guiding cylinder 5 and penetrates the temperature measuring shell 71. The discharge port 52 is installed at one end of the discharge pipe 51. The corresponding discharge hole 55 is formed at one end of the material guiding cylinder 5 at the position of the discharge pipe 51. The material guided out by the threaded push rod 53 is guided to the discharge pipe 51 through the discharge hole 55 and extruded through the discharge port 52. In actual use, the material at the end of the discharge hole 55 and in the discharge pipe 51 is in a molten state, and has a high heat. During the extrusion process, the pressure increases, which causes a large friction to the discharge pipe 51 during the extrusion process and aggravates the wear of the discharge pipe 51. The temperature control shell 7 is provided with a through opening between the temperature control shell 7 and the lower structure 4. The material guiding cylinder 5 penetrates one side of the sealing box 3 and is fixedly installed. The mounting groove 11 is formed on the top of the rack 1 at the position of the temperature control shell 7, and the mounting frame 12 and the fan 13 are fixedly installed on the mounting groove 11.

[0028] The temperature detector 56 is installed through the temperature measuring shell 71, the cold water coil 72 is installed and connected between the inner wall of the temperature control shell 7 and the bottom of the discharge pipe 51, and the two ends of the cold water coil 72 are connected and installed with the conveying pump body through the temperature measuring shell 7. The heat inside the cavity of the temperature measuring shell 71 is monitored by the temperature detector 56, and when the temperature exceeds the specified value, the conveying pump body connected with the cold water coil 72 is started through the electric control system, the cooling liquid inside the cold water coil 72 is circulated and conveyed, the heat inside the temperature measuring shell 71 is reduced, and at the same time, the fan 13 is started to accelerate the cooling effect of the outer wall of the discharge pipe 51, the friction caused by the inner wall of the discharge pipe 51 during the extrusion process is reduced, and the service life of the extruder is extended.

[0029] In the embodiment, the material is fed into the material feeding pipe 44 through the feeding port 43. In the feeding process, the material feeding pipe 44 is heated to a specified temperature by the infrared heating coil 8, so that the polyester material fed into the material feeding pipe 44 is heated and melted. When the melted polyester material is introduced into the material guiding cylinder 5, the melted polyester material is first screened by the screen frame 57 to reduce the entry of large dust into the material guiding cylinder 5. The two groups of threaded push rods 53 are driven to rotate by the main shaft motor 2 driving the two groups of belt pulley sets 21, so that the material is spirally guided out. The guided-out material is guided to the discharge pipe 51 through the discharge hole 55 and extruded through the discharge port 52 by the threaded push rod 53.

[0030] In the embodiment, the material is fed into the material feeding pipe 44 through the feeding port 43. In the feeding process, the material feeding pipe 44 is heated to a specified temperature by the infrared heating coil 8, so that the polyester material fed into the material feeding pipe 44 is heated and melted. When the melted polyester material is introduced into the material guiding cylinder 5, the melted polyester material is first screened by the screen frame 57 to reduce the entry of large dust into the material guiding cylinder 5. The two groups of threaded push rods 53 are driven to rotate by the main shaft motor 2 driving the two groups of belt pulley sets 21, so that the material is spirally guided out. The guided-out material is guided to the discharge pipe 51 through the discharge hole 55 and extruded through the discharge port 52 by the threaded push rod 53.

[0031] All the technical features in the embodiment can be freely combined according to actual needs.

[0032] The above embodiment is a preferred implementation scheme of the present application, and in addition, the present application can be implemented in other ways, and any obvious replacement without departing from the technical scheme concept is within the protection scope of the present application.

Claims

1. A cooling and temperature reduction structure at the end of a screw extruder, characterized in that, The machine includes a frame (1), a sealed box (3) is fixedly installed on the top of the frame (1), a feeding structure (4) is fixedly installed inside the sealed box (3), a heating box (6) is fixedly installed inside the sealed box (3) outside the feeding structure (4), a temperature control shell (7) is fixedly installed at the other end of the top of the frame (1), and the bottom of the temperature control shell (7) is provided with a through-hole. A guide cylinder (5) that penetrates one side of the sealed box (3) is fixedly installed between the temperature control shell (7) and the feeding structure (4). An installation groove (11) is opened on the top of the frame (1) at the position of the temperature control shell (7), and an installation bracket (12) and a fan (13) are fixedly installed on the installation groove (11).

2. The end cooling structure of a screw extruder according to claim 1, characterized in that: The feeding structure (4) includes a hopper (41) penetrating the top of the sealed box (3), a feeding pipe (44) installed at the bottom of the hopper (41), and a mounting cover (42) fixedly installed on the top of the hopper (41) by bolts. The mounting cover (42) has a feeding port (43). The bottom of the feeding pipe (44) is connected to the guide cylinder (5). Two sets of infrared heating coils (8) are fixedly installed around the outside of the feeding pipe (44).

3. The end cooling and temperature reduction structure of a screw extruder according to claim 1, characterized in that: The bottom of the feed cylinder (5) is fixedly installed to the sealing box (3) by a set of pads (32). Hot water coils (61) are fixedly installed on two sets of side walls inside the heating box (6). The hot water coils (61) are connected to each other by a connecting pipe (62) installed at the bottom of the feed cylinder (5). The other end of the hot water coil (61) passes through the sealing box (3) and is connected to the circulating conveying device.

4. The end cooling structure of a screw extruder according to claim 2, characterized in that: The guide cylinder (5) is equipped with two sets of threaded push rods (53), and the ends of the threaded push rods (53) are connected to the inner wall of the guide cylinder (5) through fixed bearings (54). A main shaft motor (2) is fixedly installed on the top of the frame (1) on one side of the sealing box (3). Two sets of pulley groups (21) driven by the main shaft motor (2) are installed on the outer wall of the sealing box (3). The output end of the pulley group (21) passes through the sealing box (3) and is rotatably connected to the threaded push rods (53). An installation frame (31) is fixedly installed on the sealing box (3) outside the pulley group (21). A screen frame (57) is fixedly installed on the top of the guide cylinder (5) at the bottom of the feeding pipe (44).

5. The end cooling and temperature reduction structure of a screw extruder according to claim 1, characterized in that: The temperature control housing (7) is equipped with a temperature measuring housing (71) on top. One end of the guide cylinder (5) passes through the temperature measuring housing (71) and is equipped with a discharge pipe (51). One end of the discharge pipe (51) is equipped with a discharge port (52). One end of the guide cylinder (5) is located at the position of the discharge pipe (51) and is provided with a corresponding discharge hole (55).

6. The end cooling structure of a screw extruder according to claim 5, characterized in that: A temperature detector (56) is installed through the temperature measuring housing (71). A cold water coil (72) is connected and installed between the inner walls of the temperature control housing (7) at the bottom of the discharge pipe (51). Both ends of the cold water coil (72) pass through the temperature control housing (7) and are connected to the conveying pump body.

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