CN219213723U

CN219213723U - Extrusion granulating equipment for medical TPU production

Info

Publication number: CN219213723U
Application number: CN202223130791.9U
Authority: CN
Inventors: 李守财; 贡侃; 欧阳晨曦; 王伯刚
Original assignee: Ningbo Beiang Biomaterials Co ltd
Current assignee: Ningbo Beiang Biomaterials Co ltd
Priority date: 2022-11-24
Filing date: 2022-11-24
Publication date: 2023-06-20
Anticipated expiration: 2032-11-24

Abstract

The utility model provides extrusion granulating equipment for medical TPU production, which comprises a cone double-feeder, a single-screw extruder, an air-cooled conveyor set, a granulator and the like, wherein the cone double-feeder is provided with two meshed cone screws, and the cone screws can crush the thrown plate-shaped materials and feed the materials into the single-screw extruder; the single-screw extruder is provided with an extrusion screw, a heater and a forming die head, wherein the extrusion screw melts the fed materials and extrudes the melted materials from the forming die head; the air cooling conveyor unit is provided with a conveyor belt and an air cooling device covered on the conveyor belt, wherein the conveyor belt is used for conveying extruded materials and cooling and solidifying the extruded materials through the air cooling device in the transportation process; the granulator is arranged at the other end of the air-cooled conveyor unit, and a cutter blade of the granulator is used for cutting the cooled materials into granules (strips). The extrusion granulating equipment overcomes the defects of larger volume, complicated preparation and large environmental pollution of the existing TPU production equipment.

Description

Extrusion granulating equipment for medical TPU production

Technical Field

The utility model relates to the field of medical TPU production, in particular to extrusion granulating equipment for medical TPU production.

Background

The thermoplastic polyurethane elastomer is also called thermoplastic polyurethane rubber, and is called TPU for short, and is An (AB) n-type block linear polymer, A is polyester or polyether with high molecular weight, B is glycol with 2-12 straight-chain carbon atoms, and the chemical structure between AB chain segments is diisocyanate. Thermoplastic polyurethane rubber is crosslinked by intermolecular hydrogen bond or slightly crosslinked between macromolecular chains, and the two crosslinking structures have reversibility along with the rise or fall of temperature. The intermolecular force is weakened in a molten state or a solution state, and the strong intermolecular force is connected together after cooling or solvent volatilization, so that the original solid performance is recovered.

The TPU has wide application, the production equipment of the prior TPU is complex, the volume of each device is large, and the TPU is not suitable for being used in smaller spaces such as laboratories; in addition, at present, TPU production is generally carried out by directly putting materials into a crusher for crushing, so that the equipment is greatly damaged, and the environmental pollution is great; in the production of the prior TPU, the water cooling mode is generally adopted for cooling, and polyurethane is easy to hydrolyze, so that the physical properties of the prepared polyurethane are easily reduced.

Disclosure of Invention

First, the technical problem to be solved

The utility model aims to solve the problem of providing extrusion granulating equipment for producing medical TPU, so as to overcome the defects of larger volume, complicated preparation and large environmental pollution of the existing TPU production equipment.

(II) technical scheme

In order to solve the technical problems, the utility model provides extrusion granulating equipment for producing medical TPU, which comprises the following components:

the cone double-feeding machine is arranged at a feeding port of the single-screw extruder; the cone double-feeding machine is provided with two meshed cone screws, and the cone screws can melt, soften, crush and feed the input platy materials into the single-screw extruder;

a single screw extruder having a rotatable extrusion screw for melting a fed material and extruding the melted material from a forming die, a heater for heating the extrusion screw, and a forming die mounted at a discharge end of the extrusion screw;

an air-cooled conveyor unit, one end of which is arranged adjacent to the forming die head; the air cooling conveyor unit is provided with a conveyor belt and an air cooling device covered on the conveyor belt, wherein the conveyor belt is used for conveying extruded materials and cooling and solidifying the extruded materials through the air cooling device in the transportation process;

the granulator is arranged at the other end of the air-cooled conveyor unit; the pelletizer has a rotatable chopper for chopping the cooled material into pellets or strips.

Further, the extrusion granulating equipment further comprises a vibrating screen and a bin, wherein the vibrating screen is arranged between the granulator and the bin and is used for conveying granular materials in the granulator into the bin for storage.

Further, the air cooling device comprises an air housing, a cooling air channel is formed in the air housing, the conveyor belt is arranged in the cooling air channel, a plurality of groups of fans are installed in the air housing at intervals, and a plurality of air inlets are formed in the outer wall of the air housing at intervals. The air cooling device further comprises a movable air cooling support, the air housing is arranged at the top of the air cooling support, and universal wheels are arranged at the bottom of the air cooling support. Wherein, the conveyer belt is TPFE conveyer belt.

Furthermore, the cone double-feeding machine comprises a feeding machine seat, the cone screw is installed in the feeding machine seat, a feeding hopper is arranged at the upper end of the feeding machine seat, and a heating device for heating the cone screw is further arranged in the feeding machine seat. The single-screw extruder comprises a base, a machine barrel is arranged on the base through a bracket, the extrusion screw is rotatably arranged in the machine barrel, a hopper is arranged at the inner side end of the machine barrel, the forming die head is arranged at the outer side end of the machine barrel, and the hopper is connected with the discharge end of the cone double-feeding machine. The single-screw extruder further comprises fan covers arranged on the outer wall of the machine barrel at intervals, and a fan is arranged in each fan cover; the base is provided with a motor, and the motor is in driving connection with the extrusion screw rod through a gear box.

Further, the feed bin comprises a hopper support and a conical hopper arranged on the hopper support, and a control valve is arranged at the outlet of the lower part of the conical hopper. And a stirring device and a heating device are arranged in the conical hopper.

(III) beneficial effects

Compared with the prior art, the extrusion granulating equipment for producing the medical TPU has the following advantages:

1) The preparation process is optimized, the structure and the volume of each device are simplified, and the method is applicable to producing solid medical TPU in smaller spaces such as laboratories; during preparation, plate-shaped materials are crushed by a cone double feeder and fed to a single screw extruder, the materials are melted and extruded to a required shape by the single screw extruder, then the materials are cooled by an air cooling conveyor unit, the cooled materials are crushed into granular materials by a granulator, and finally the materials are conveyed to a storage bin by a vibrating screen for storage, so that the preparation process is simple, and the preparation effect is good;

2) The cone double-feeder is adopted to forcedly feed plate materials into the single-screw extruder, so that the damage can be reduced, and the environmental pollution can be avoided;

3) The air-cooled conveyor unit is adopted to cool the extruded materials, so that the hydrolysis of TPU (thermoplastic polyurethane) can be avoided, the preparation quality is ensured, and the water pollution is avoided;

4) All parts contacted with the materials are made of 316 stainless steel materials, and the method is applicable to the production of medical TPU;

5) The TPFE conveyor belt is used for conveying extruded materials, so that the TPFE and the TPU are not bonded, the cleaning is easy, the TPFE is high-temperature resistant, and the TPFE is durable.

Drawings

FIG. 1 is a schematic diagram of the structure of an extrusion granulation apparatus for use in the production of medical TPU according to the present utility model from a front view perspective;

FIG. 2 is a schematic diagram of the structure of an extrusion granulation apparatus for use in the production of medical TPU from a top view perspective of the present utility model;

FIG. 3 is a schematic diagram of the structure of the cone double feeders for extrusion granulation equipment for medical TPU production in a top view;

FIG. 4 is a schematic diagram of the structure of the cone double feeders for the extrusion granulation equipment for the production of medical TPU according to the present utility model in front view;

FIG. 5 is a schematic view of the structure of a single screw extruder of an extrusion granulation apparatus for use in the production of medical TPU according to the present utility model;

FIG. 6 is a schematic diagram of an air-cooled conveyor train of an extrusion granulation apparatus for use in the production of medical TPU according to the present utility model;

FIG. 7 is a schematic view of the structure of a silo of an extrusion granulating apparatus for producing medical TPU;

the corresponding component names for each reference number in the figures are: 1. a cone double feeder; 11. a conical screw; 12. a feeding machine base; 13. a charging hopper; 2. a single screw extruder; 21. extruding a screw; 22. a forming die; 23. a base; 24. a bracket; 25. a barrel; 26. a hopper; 27. a fan cover; 28. a motor; 29. a gear box; 3. an air-cooled conveyor unit; 31. a conveyor belt; 32. an air cooling device; 321. a wind housing; 322. a cooling air duct; 323. an air port; 324. an air-cooled bracket; 4. a granulator; 5. a vibrating screen; 6. a storage bin; 61. a hopper support; 62. a conical hopper; 63. and controlling the valve.

Detailed Description

The following describes in further detail the embodiments of the present utility model with reference to the drawings and examples. The following examples are illustrative of the utility model and are not intended to limit the scope of the utility model.

Referring to fig. 1 to 7, the present utility model provides an extrusion granulation apparatus for use in the production of medical TPU, comprising: the device comprises a cone double-feeder 1, a single-screw extruder 2, an air-cooled conveyor set 3, a granulator 4, a vibrating screen 5 and a stock bin 6.

Referring to fig. 2 to 4, a cone double feeder 1 is installed at a feeding port of a single screw extruder 2; the cone double feeder 1 has two conical screws 11 which are engaged with each other, and the conical screws 11 crush the charged plate-like material and feed the single-screw extruder 2. The cone double-feeding machine 1 comprises a feeding machine seat 12, a cone screw 11 is rotatably arranged in the feeding machine seat 12, the cone screw 11 can be driven by a motor to rotate, a feeding hopper 13 is arranged at the upper end of the feeding machine seat 12, and the feeding hopper 13 is used for feeding plate-shaped materials. The inside of the feeding machine seat 12 is also provided with a heating device for heating the conical screw 11, and the heating device can be an electric heater.

Referring to fig. 2 and 5, the single screw extruder 2 has a rotatable extrusion screw 21, a heater for heating the extrusion screw 21, and a forming die 22 mounted at the discharge end of the extrusion screw 21, the extrusion screw 21 being for melting the fed material and extruding the melted material from the forming die 22; the heater can adopt an electric heater, so that the heating effect is good; the shaping die 22 may be replaced according to the desired extrusion shape, in this embodiment extruded as a strip.

Referring to fig. 5, the single screw extruder 2 further includes a base 23, a barrel 25 is mounted on the base 23 through a bracket 24, the extrusion screw 21 is rotatably mounted in the barrel 25, a hopper 26 is disposed at an inner end of the barrel 25, a forming die 22 is mounted at an outer end of the hopper 26, and the hopper 26 is connected with a discharge end of the cone double feeder 1. The single-screw extruder 2 also comprises fan covers 27 which are arranged on the outer wall of the machine barrel 25 at intervals, and fans are arranged in the fan covers 27, so that the machine barrel 25 can be conveniently cooled; the base 23 is provided with a motor 28, and the motor 28 is in driving connection with the extrusion screw 21 through a gear box 29.

Referring to fig. 1 and 6, one end of the air-cooled conveyor assembly 3 is disposed adjacent to the forming die 22; the air-cooled conveyor unit 3 has a conveyor belt 31 and an air cooling device 32 provided on the conveyor belt 31, and the conveyor belt 31 is configured to convey the extruded material and cool and solidify the extruded material by the air cooling device 32 during transportation. The conveyor belt 31 is a TPFE (polytetrafluoroethylene) conveyor belt, and the TPFE conveyor belt is used for conveying extruded materials, so that the TPFE and the TPU are not bonded, easy to clean, high-temperature resistant and durable.

Referring to fig. 6, the air cooling device 32 includes an air casing 321, a cooling air duct 322 is formed in the air casing 321, the conveyor belt 31 is disposed in the cooling air duct 322, a plurality of groups of fans are installed in the air casing 321 at intervals, and a plurality of air ports 323 are formed in the outer wall of the air casing 321 at intervals. The air cooling device 32 further comprises a movable air cooling bracket 324, the air housing 321 is arranged at the top of the air cooling bracket 324, and universal wheels are arranged at the bottom of the air cooling bracket 324, so that the air cooling bracket 324 can move conveniently.

Referring to fig. 1 and 2, a pelletizer 4 is disposed at the other end of the air-cooled conveyor set 3; the granulator 4 has rotatable chopping knives for chopping the cooled material into particulate material. A vibrating screen 5 is mounted between the pelletizer 4 and the magazine 6 for storing the particulate material in the pelletizer 4 in the transport feed magazine 6.

Referring to fig. 1 and 7, the bin 6 includes a hopper support 61 and a conical hopper 62 mounted on the hopper support 61, and a control valve 63 is mounted at a lower outlet of the conical hopper 62 to facilitate discharging materials; a stirring device and a heating device are arranged in the conical hopper 62, and the heating device can adopt an electric heater and can remove water in materials; the stirring device can adopt stirring slurry to ensure uniformity.

In order to be suitable for the production of medical grade TPU, in the embodiment, all parts which are in contact with materials are made of 316 stainless steel materials, so that the manufacturing requirements are met.

The extrusion granulating equipment has the following preparation process:

during preparation, plate-shaped initial materials are put into the cone double-feeder 1, and the materials are crushed by two cone screws 11 of the cone double-feeder 1 and fed into the single-screw extruder 2; the extrusion screw 21 of the single screw extruder 2 melts the materials, and conveys the melted materials towards the forming die head 22, the melted materials are extruded from the forming die head 22 to form strips, the strips enter the conveyor belt 31, and the strips are cooled and solidified on the way of conveying by the conveyor belt 31; the cooled and solidified material is then fed into a granulator 4, chopped into granules by a chopper of the granulator 4, and finally the granulated material in the granulator 4 is transported and fed into a bin 6 for storage by a vibrating screen 5.

The extrusion granulating equipment for producing the medical TPU provided by the embodiment optimizes the preparation flow, simplifies the structure and the volume of each equipment, and can be suitable for producing solid medical TPU in smaller spaces such as laboratories; the preparation process is simple, and the preparation effect is good; the cone double-feeder is adopted to forcedly feed plate materials into the single-screw extruder, so that the damage can be reduced, and the environmental pollution can be avoided; the air-cooled conveyor unit is adopted to cool the extruded materials, so that the hydrolysis of TPU (thermoplastic polyurethane) can be avoided, the preparation quality is ensured, and the water pollution is avoided; all parts contacted with the materials are made of 316 stainless steel materials, and the method is applicable to the production of medical TPU; the TPFE conveyor belt is used for conveying the extruded materials, so that the TPFE and the TPU are not bonded, the cleaning is easy, the TPFE is high-temperature resistant, and the TPFE is durable.

The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that it will be apparent to those skilled in the art that several modifications and variations can be made without departing from the technical principle of the present utility model, and these modifications and variations should also be regarded as the scope of the utility model.

Claims

1. An extrusion granulation apparatus for the production of medical TPU, comprising:

the cone double-feeding machine (1) is arranged at the upper end of a feeding port of the single-screw extruder (2); the cone double-feeding machine (1) is provided with two meshed cone screws (11), and the cone screws (11) can melt, soften, crush and feed the input platy materials into the single-screw extruder (2);

a single screw extruder (2) having a rotatable extrusion screw (21), a heater for heating the extrusion screw (21), and a forming die (22) mounted at a discharge end of the extrusion screw (21), the extrusion screw (21) being for melting a fed material and extruding the melted material from the forming die (22);

an air-cooled conveyor unit (3) having one end disposed adjacent the forming die (22); the air cooling conveyor unit (3) is provided with a conveyor belt (31) and an air cooling device (32) covered on the conveyor belt (31), wherein the conveyor belt (31) is used for conveying extruded materials and cooling and solidifying the extruded materials through the air cooling device (32) in the process of transportation;

the granulator (4) is arranged at the other end of the air-cooled conveyor unit (3); the granulator (4) has rotatable chopping knives for chopping the cooled material into granules or strips.

2. Extrusion granulation apparatus for the production of medical TPU according to claim 1, wherein: still include shale shaker (5) and feed bin (6), shale shaker (5) install in between granulator (4) with feed bin (6) are used for with granular material in granulator (4) is transported into in feed bin (6) stores.

3. Extrusion granulation apparatus for the production of medical TPU according to claim 1, wherein: the air cooling device (32) comprises an air housing (321), a cooling air duct (322) is formed in the air housing (321), the conveyor belt (31) is arranged in the cooling air duct (322), a plurality of groups of fans are arranged in the air housing (321) at intervals, and a plurality of air inlets (323) are formed in the outer wall of the air housing (321) at intervals.

4. An extrusion granulation apparatus for the production of medical TPU as set forth in claim 3, wherein: the air cooling device (32) further comprises a movable air cooling bracket (324), the air housing (321) is arranged at the top of the air cooling bracket (324), and universal wheels are arranged at the bottom of the air cooling bracket (324).

5. Extrusion granulation apparatus for the production of medical TPU according to claim 1, wherein: the conveyor belt (31) is a TPFE conveyor belt.

6. Extrusion granulation apparatus for the production of medical TPU according to claim 1, wherein: the cone double-feeding machine (1) comprises a feeding machine seat (12), wherein the cone screw (11) is installed in the feeding machine seat (12), a feeding hopper (13) is arranged at the upper end of the feeding machine seat (12), and a heating device for heating the cone screw (11) is further arranged in the feeding machine seat (12).

7. Extrusion granulation apparatus for the production of medical TPU according to claim 1, wherein: the single-screw extruder (2) comprises a base (23), a machine barrel (25) is arranged on the base (23) through a support (24), the extrusion screw (21) is rotatably arranged in the machine barrel (25), a hopper (26) is arranged at the inner side end of the machine barrel (25), the forming die head (22) is arranged at the outer side end of the hopper, and the hopper (26) is connected with the discharge end of the cone double-feeding machine (1).

8. Extrusion granulator device for the production of medical TPU according to claim 7, characterised in that: the single-screw extruder (2) further comprises fan covers (27) arranged on the outer wall of the machine barrel (25) at intervals, and a fan is arranged in each fan cover (27); the base (23) is provided with a motor (28), and the motor (28) is in driving connection with the extrusion screw (21) through a gear box (29).

9. Extrusion granulation apparatus for the production of medical TPU as defined in claim 2 wherein: the bin (6) comprises a hopper support (61) and a conical hopper (62) arranged on the hopper support (61), and a control valve (63) is arranged at the lower outlet of the conical hopper (62).

10. Extrusion granulation apparatus for the production of medical TPU as defined in claim 9 wherein: and a stirring device and a heating device are arranged in the conical hopper (62).