CN114557234A - Screw extrusion device suitable for processing edible mushroom cultivation base material and application thereof - Google Patents
Screw extrusion device suitable for processing edible mushroom cultivation base material and application thereof Download PDFInfo
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- CN114557234A CN114557234A CN202210131063.5A CN202210131063A CN114557234A CN 114557234 A CN114557234 A CN 114557234A CN 202210131063 A CN202210131063 A CN 202210131063A CN 114557234 A CN114557234 A CN 114557234A
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G18/00—Cultivation of mushrooms
- A01G18/20—Culture media, e.g. compost
- A01G18/22—Apparatus for the preparation of culture media, e.g. bottling devices
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G18/00—Cultivation of mushrooms
- A01G18/30—Accessories for use before inoculation of spawn, e.g. sterilisers
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Abstract
The invention discloses a screw extrusion device suitable for processing edible mushroom cultivation base materials, which comprises a feeding machine and a screw extruder, wherein a discharge hole of the feeding machine is communicated with a feed inlet of the screw extruder; the feeding machine comprises a feeding motor, a feeding hopper and a feeding screw rod, wherein the feeding hopper is arranged on the feeding screw rod, and a rotating shaft of the feeding motor is connected with the feeding screw rod; the screw extruder comprises a main motor, an extrusion screw, an extrusion die head, a sleeve and an extrusion area heating temperature control system, wherein the main motor is used for driving the screw extruder, and a rotating shaft of the main motor is connected with the extrusion screw of the screw extruder; the extrusion die head is a built-in extrusion module which is arranged on the extrusion screw and rotates along with the extrusion screw. The invention can expand the application range of the traditional screw extruder, is applied to the processing of the edible fungus cultivation base material containing a large amount of non-uniform high-fiber large-particle materials, and solves the technical defects of the existing screw extruder that the processing of the edible fungus cultivation base material cannot be carried out due to extremely easy blockage and intermittent violent spray explosion.
Description
Technical Field
The invention relates to a screw extrusion device suitable for processing an edible mushroom cultivation base material and application thereof, belonging to the technical field of processing of edible mushroom cultivation base materials.
Background
With the increasing demand of people on edible fungi, the fungi become a necessary choice on dining tables of people, and the development of the edible fungi industry is greatly promoted in turn. China has become the world's "huge super" for edible fungus production, becoming the world's largest producing and consuming countries for edible fungi, wherein the production accounts for more than 70% of the world's total production. The huge total yield of edible fungi is the consumption of production materials such as cultivation base materials, packaging bags, glass bottles and the like, particularly the consumption of the cultivation base materials. The dry cultivation base material is mixed with a proper amount of water before inoculation, and the water content of the dry cultivation base material is adjusted to 50-70% (the requirements of various edible fungi on the water content of the base material are slightly different), wherein the sterilization process of the cultivation base material is a huge workload.
At present, the cultivation base material bag is sterilized by a steam boiler mainly, and the process conditions are that the cultivation base material bag is sterilized at 100 ℃ under normal pressure for 12-24 hours or is sterilized at 0.15 MPa for 3-6 hours. Meanwhile, the sterilization mode has 10-15% of waste bag rate, once the sterilization mode is not properly treated, secondary pollution of the whole batch of fungus bags is caused, and the sterilization mode is long in time, large in energy consumption and high in labor cost. The edible fungus bag is based on the huge demand, and the current sterilization mode has the problems. Regarding the sterilization of edible fungus bags, all patents refer to the improvement of the sterilization of steam boilers, for example, patents 201420432454.1, 201220462580.2, 201510505896.3 and 201510497693.4, and the adjustment and improvement of the equipment or process for the sterilization of steam boilers have achieved certain effects, but still cannot fundamentally change various disadvantages of the sterilization of edible fungus bags by steam boilers.
Referring to fig. 1 and 2, in an earlier stage, the inventor of the present invention has studied a fungus sack processing apparatus and a fungus sack processing method, and CN107173056A discloses that the processing apparatus includes a material conveying system, a sterilization system, a cooling and wetting system, and an aseptic filling system, which are sequentially arranged, the material conveying system includes a screw feeder, the sterilization system includes a screw extruder, the cooling and wetting system includes a stirrer, a discharge port of the screw feeder is communicated with a feed port of the screw extruder, an extrusion port of the screw extruder is communicated with a feed port of the stirrer, a plurality of aseptic cooling water nozzles are arranged in the stirrer, and a discharge port of the stirrer is communicated with a feed port of the aseptic filling system. The method applies the screw extrusion solid sterilization technology and the sterile filling and sealing technology to the sterilization filling process of the fungus bags, improves the production of the fungus bags, and has the advantages of time saving, labor saving, energy saving and high efficiency compared with the prior art. However, through further applications, it has been found that problems still exist, such as processes involving extrusion of dry crop bases, and many other areas exist where further improvements are needed. For example, the existing screw extruder has the technical defects of being easy to block and incapable of processing due to intermittent severe spray explosion when processing the edible fungus cultivation base material. At present, all extrusion and puffing equipment generally processes materials with relatively good fluidity, the equipment adopts a static die head, the fluidity of the materials is fully utilized, the processed materials are solid high-fiber materials, namely edible fungus cultivation base materials, the fluidity is very poor, and if the static die head is adopted, blockage is very easy to occur, intermittent severe spray explosion is generated, and normal production cannot be realized. Therefore, the present inventors have made the present invention through a demonstration study.
Disclosure of Invention
Aiming at the defects of the prior art, the invention overcomes the defect of poor material fluidity by using the braking die head, thereby realizing the normal production of the equipment and having good improvement effect.
The screw extrusion device suitable for processing the edible mushroom cultivation base material provided by the invention can expand the application range of the traditional screw extruder, is applied to processing the edible mushroom cultivation base material containing a large amount of non-uniform high-fiber large-particle materials such as sawdust, corncobs, cottonseed hulls and the like, and solves the technical defects that the conventional screw extruder cannot process the edible mushroom cultivation base material due to extremely easy blockage and intermittent violent spray explosion, so that the self-heating sterilization processing in the process of conveying the edible mushroom cultivation base material by properly pressurizing and increasing heat and friction in the screw extrusion conveying process is realized.
The invention is mainly realized by the following technical scheme.
A screw extrusion device suitable for processing edible mushroom cultivation base materials comprises a feeding machine and a screw extruder, wherein a discharge hole of the feeding machine is communicated with a feed inlet of the screw extruder; the feeding machine comprises a feeding motor, a feeding hopper and a feeding screw rod, wherein the feeding hopper is arranged on the feeding screw rod, and a rotating shaft of the feeding motor is connected with the feeding screw rod; the screw extruder comprises a main motor, an extrusion screw, an extrusion die head, a sleeve and an extrusion area heating temperature control system, wherein the extrusion area heating temperature control system is preferably divided into three areas, namely: the device comprises an extrusion I area, an extrusion II area and an extrusion sterilization III area, wherein a main motor is used for driving a screw extruder, and a rotating shaft of the main motor is connected with an extrusion screw of the screw extruder; the extrusion die head is a built-in extrusion module which is arranged on the extrusion screw and rotates along with the extrusion screw.
The screw extrusion device is characterized in that the built-in extrusion module is arranged on an extrusion screw at a certain distance in a discharge port of the screw extruder and is at a certain distance from the discharge port, the built-in extrusion module has a certain thickness, the outer edge of the built-in extrusion module is circular when rotating along with the extrusion screw, a certain gap is reserved between the circular outer edge and an extrusion screw sleeve, and die orifices with different shapes, sizes and quantities are formed in the built-in extrusion module.
The screw extrusion device is characterized in that the screw extruder is a double-screw extruder, the built-in extrusion modules are installed on the double-screw extruder in a close proximity manner in pairs, and a certain gap is formed between the two built-in extrusion modules so as to prevent the two built-in extrusion modules from mutual friction and collision when the extrusion screws operate.
The screw extrusion device is characterized in that a gap of 0.1-2 mm is designed between the two built-in extrusion modules.
The screw extrusion device is characterized in that the thickness of the die opening part of the built-in extrusion module is 1-30 mm, so that the built-in extrusion module can bear certain high pressure and cannot deform during extrusion operation of the extrusion screw.
The screw extrusion device is characterized in that a gap of 0.1-5 mm is reserved between the outermost edge of the built-in extrusion module and the screw sleeve, so that certain internal pressure can be formed in the extrusion operation of the extrusion screw.
The screw extrusion device is characterized in that the die openings are provided with notches in a circular shape, a triangular shape, a rectangular shape or other regular or irregular shapes on the built-in extrusion module, the die openings have different sizes, the number of the die openings is 1-100, and the die openings can adapt to extrusion processing of different edible fungus culture medium raw materials in different shapes, sizes and numbers.
The screw extrusion device further comprises a built-in extrusion module, wherein the built-in extrusion module can be arranged at the position flush with a sleeve of a discharge port of the screw extruder and also can be arranged at the position internally moved by 0-500 mm.
The screw extrusion device comprises the following specific embodiments: the screw extruder is a double-screw extruder, the built-in extrusion modules are in a pair, the mounting positions of the built-in extrusion modules are flush with the edge of the sleeve of the discharge port, the outer edge of each built-in extrusion module and the gap between the outer edge of each sleeve are 3mm, the thickness of the opening part of each module is 30mm, the gap between the two modules is 0.8mm, and 10 semicircular die openings with the diameter of 5mm are formed in the two modules.
The screw extrusion device has the following other specific embodiments: the screw extruder is a double-screw extruder, the built-in extrusion modules are a pair, the distance between the mounting positions and the edge of the discharge port sleeve is 100mm, the gap between the outer edge of each module and the sleeve is 2mm, the thickness of the opening part of each module is 20mm, the gap between each two adjacent modules is 0.3mm, and 20 equilateral triangle dies with the side length of 4mm are arranged on each two adjacent modules.
The invention has the following beneficial effects:
the material processed by the invention is a solid high-fiber material-edible fungus cultivation base material, the fluidity is very poor, and if a static die head is adopted, the phenomena of easy blockage and intermittent severe spray explosion can be generated, and the normal production can not be realized. In the past, materials with good fluidity such as protein, starch and the like are generally used as processing objects, and the phenomena of easy blockage and intermittent severe spray explosion in the processing process do not exist. It is not necessary nor conceivable to modify it to a built-in extrusion module.
According to the invention, the conventional extrusion die head is replaced by the built-in extrusion module, so that the edible fungus cultivation base material which is a material with high fiber, large particles, low fluidity and non-uniform state, such as wood chips, corncobs, cottonseed hulls and the like, can be smoothly extruded by the screw, and the phenomena of blockage, spray explosion and the like can be avoided.
Secondly, the specially designed die orifice shape, size, quantity and the like of the built-in extrusion module provide certain resistance to the material passing through, so that the high temperature and high pressure required by extrusion are ensured to be generated; meanwhile, the die opening can enable extruded materials to pass smoothly, and smooth production is guaranteed.
The built-in extrusion module is arranged at the tail end of the discharge port of the screw extruder and is 0-500 mm away from the discharge port, so that the application range of the traditional screw extruder can be expanded, and the technical defects of the existing screw extruder that the traditional screw extruder cannot process edible mushroom cultivation base materials due to extremely easy blockage and intermittent severe spray explosion are overcome. The invention can realize the proper pressurization and increase of friction heat generation (which can be realized by properly changing the area of the discharge hole of the die head) in the screw extrusion conveying process to carry out the self-heating sterilization processing in the conveying process of the edible mushroom cultivation base material. The invention lays a foundation for developing brand new edible fungus cultivation base material screw extrusion sterilization equipment.
Drawings
FIG. 1 is a schematic view of a conventional screw extruder of the prior art.
FIG. 2 top view of a twin screw structure in a conventional screw extruder of the prior art.
Fig. 3 is a schematic structural diagram of the whole installation position of the paired built-in extrusion modules.
Fig. 4 is a schematic diagram of the installation position structure of the built-in extrusion module.
Fig. 5 is a schematic view of a single internal extrusion module mounting configuration.
Fig. 6 is a schematic view of a pair of built-in compression module mounting structures.
Fig. 7-1 to 7-4 are schematic views of an installation position and a structure of a built-in compression module in embodiment 1, wherein:
FIG. 7-1 is a schematic view showing the installation position of the internal compression module in embodiment 1;
7-2 the structure of the built-in extrusion module in the embodiment 1 is schematically illustrated;
7-3 the sectional views of the structures of the paired adjacent mounting positions of the built-in extrusion modules in the embodiment 1 are shown;
fig. 7-4 top plan views of the paired immediate vicinity mounting location structures of the internal extrusion modules of embodiment 1.
Fig. 8-1 to 8-4 are schematic views of the installation position and structure of the built-in compression module in embodiment 2, wherein:
FIG. 8-1 is a schematic view showing the installation position of the internal extrusion module in embodiment 2;
FIG. 8-2 is a schematic view of the structure of the internal extrusion module of example 2;
8-3 the sectional view of the structure of the built-in extrusion module in the embodiment 2 in pairs next to the installation position;
fig. 8-4 top plan views of the paired immediate vicinity mounting location structures of the internal extrusion modules of embodiment 2.
Wherein 1, a main motor, 2, a feeding motor, 3, a feeding hopper, 4, a feeding screw, 5, an extrusion screw, 6, heating and temperature control of an extrusion I area, 7, heating and temperature control of an extrusion II area, 8, heating and temperature control of an extrusion sterilization III area, 9, an extrusion die head, 10, a sleeve, 11, a discharge port, 12, a built-in extrusion module, 13, a distance between a module installation position and the edge of a sleeve of the discharge port screw, 14, a die orifice of the built-in extrusion module, 15, a gap between the module and the sleeve, 15-1, a gap between the module and the sleeve in example 1, 3mm, 15-2, a gap between the module and the sleeve in example 2, 2mm, 16, a front gap and a rear gap of an adjacent module, 16-1, a front gap and a rear gap of an adjacent module in example 1, 0.3mm, 17-1, and a thickness of an opening part of the built-in example 1, 17-2, and the thickness of the opening part of the built-in extrusion module in the embodiment 2 is 20 mm.
Detailed Description
Example 1
Referring to fig. 3 to 6 and fig. 7-1 to 7-4, the screw extrusion device suitable for processing edible mushroom cultivation base material of the present invention comprises a feeder and a screw extruder, wherein a discharge port of the feeder is communicated with a feed port of the screw extruder; the feeding machine comprises a feeding motor 2, a feeding hopper 3 and a feeding screw rod 4, wherein the feeding hopper 3 is arranged on the feeding screw rod 4, and a rotating shaft of the feeding motor 2 is connected with the feeding screw rod 4; the screw extruder comprises a main motor 1, an extrusion screw 5, an extrusion I area heating temperature control 6, an extrusion II area heating temperature control 7, an extrusion sterilization III area heating temperature control 8, a sleeve 10, a discharge port 11 and a built-in extrusion module 12, wherein the main motor 1 is used for driving the screw extruder, a rotating shaft of the main motor 1 is connected with the extrusion screw 5 of the screw extruder, and the built-in extrusion module 12 is installed on the extrusion screw 5 and rotates along with the extrusion screw 5. The built-in extrusion module 12 has a certain thickness (17-1, the thickness of the opening part of the built-in extrusion module 12 is 30 mm), the outer edge of the built-in extrusion module 12 is circular when rotating along with the extrusion screw 5, a certain gap 15 is left between the circular outer edge and the sleeve 10, and the built-in extrusion module 12 is provided with die orifices 14 with different shapes and numbers, such as a semicircle, a triangle and a rectangle (please refer to the left, the middle and the right figures in fig. 5, respectively). The screw extruder is a double-screw extruder, the built-in extrusion modules 12 are arranged on the double-screw extruder in a pair and close to each other, and a certain gap 16 is formed between the two built-in extrusion modules, so that the two built-in extrusion modules 12 cannot rub and collide with each other when the extrusion screws 5 run.
The invention installs a pair of built-in extrusion modules 12 on a conventional screw extruder, the built-in extrusion modules 12 are arranged, the installation positions are flush with the edge of a sleeve 10 of a discharge port 11 (figure 7-1, the installation position of the built-in extrusion module is 0mm away from the edge of the sleeve), the gap between the outer edge of the built-in extrusion module 12 and the sleeve 10 is 3mm (15-1), the thickness of the opening part of the module is 30mm (17-1), the gap between two sheets is 0.8mm (16-1, figure 7-4), and 10 semicircular die orifices 14 with the diameter of 5mm are arranged on the two sheets (figure 7-2, figure 7-3).
The lentinus edodes cultivation base material prepared according to production requirements is filled into a feed hopper 3 and is sent into an extrusion I area by a feed screw 4, the lentinus edodes cultivation base material sequentially passes through an extrusion II area 7 and an extrusion III area 8 under the action of an extrusion screw 5, and is finally discharged from a discharge hole 11 through a built-in extrusion module 12, the extrusion process is completed, and the extrusion process conditions are as follows: the three-zone temperature is 65 ℃ in the zone I, 110 ℃ in the zone II and 135 ℃ in the zone III respectively, and the screw rotation speed is 160 rpm. In the process, phenomena such as blockage, spray explosion and the like which often occur when the extrusion die head is installed do not occur, and the shiitake cultivation base material uniformly and stably passes through the built-in extrusion module to complete extrusion and expansion. The working time of the automatic heating devices in the three sections is observed and recorded, and the fact that the working time of the automatic heating devices in the three sections is shortened by 10%, 13% and 15% under the condition of the built-in extrusion module 12 is found, shows that under the action of the built-in extrusion module 12, when the packaged mushroom cultivation base material is smoothly output, the whole frictional heat generation is promoted in the extrusion process, namely, the working time of electric heating of the outer wall is reduced, and the energy consumption is reduced.
Example 2
Referring to fig. 3 to 6 and fig. 8-1 to 8-4, the screw extrusion device suitable for processing edible fungus cultivation base material of the present invention comprises a feeder and a screw extruder, wherein a discharge port of the feeder is communicated with a feed port of the screw extruder; the feeding machine comprises a feeding motor 2, a feeding hopper 3 and a feeding screw rod 4, wherein the feeding hopper 3 is arranged on the feeding screw rod 4, and a rotating shaft of the feeding motor 2 is connected with the feeding screw rod 4; the screw extruder comprises a main motor 1, an extrusion screw 5, an extrusion I area heating temperature control 6, an extrusion II area heating temperature control 7, an extrusion sterilization III area heating temperature control 8 and a built-in extrusion module 12, wherein the main motor 1 is used for driving the screw extruder, the rotating shaft of the main motor 1 is connected with the extrusion screw 4 of the screw extruder, and the built-in extrusion module 12 is installed on the extrusion screw 5 and rotates along with the extrusion screw 5. The built-in extrusion module has a certain thickness (17-2, in this embodiment, the thickness of the opening part of the built-in extrusion module 12 is 20 mm), the outer edge of the built-in extrusion module 12 is circular when rotating along with the extrusion screw 5, a certain gap is left between the circular outer edge and the sleeve 10, and the built-in extrusion module 12 is provided with die orifices 14 with different shapes and numbers. The screw extruder is a double-screw extruder, the built-in extrusion modules 12 are arranged on the double-screw extruder in a pair and close to each other, and a certain gap 16 is formed between the two built-in extrusion modules, so that the two built-in extrusion modules 12 cannot rub and collide with each other when the extrusion screws 5 run.
The invention installs the built-in extrusion module 12 on the conventional screw extruder, the built-in extrusion module 12 is installed 100mm (13-1, figure 8-1) apart from the edge of the sleeve 10 of the discharge port 11 in pairs, the clearance between the outer edge of the built-in extrusion module 12 and the sleeve 10 is 2mm (15-2), the thickness of the opening part of the module is 20mm (17-2), the clearance between the two pieces is 0.3mm (16-2, figure 8-3), and the two pieces are both provided with 20 equilateral triangle dies 14 (figure 8-2, figure 8-3) with the side length of 4 mm.
The oyster mushroom cultivation base material prepared according to the production requirement is filled into a feed hopper 3 and is sent into an extrusion I area by a feed screw 4. The oyster mushroom cultivation base material sequentially passes through the second extrusion area 7 and the third extrusion area 8 under the action of the extrusion screw 5, and is finally discharged from the discharge hole 11 through the built-in extrusion module 12, so that the extrusion process is completed. The extrusion process conditions are as follows: the three-zone temperature is 65 ℃ in the zone I, 110 ℃ in the zone II and 135 ℃ in the zone III respectively, and the screw rotation speed is 160 rpm. In the process, phenomena such as blockage, spray explosion and the like which often occur when a conventional extrusion die head is installed do not occur, and the oyster mushroom cultivation base material uniformly and stably passes through the built-in extrusion module 12 to complete extrusion and expansion. Meanwhile, the working time of the automatic heating devices in the three sections is observed and recorded, and the fact that the working time of the automatic heating devices in the three sections is respectively shortened by 15%, 16% and 20% under the condition of the built-in extrusion module 12 shows that under the action of the built-in extrusion module 12, when the packaged mushroom cultivation base material is smoothly output, the whole frictional heat generation is promoted in the extrusion process, namely, the working time of external heating is shortened, and the energy consumption is reduced.
When the edible fungus cultivation base material is processed, the edible fungus cultivation base material has certain proper pressurization and friction increasing heat production effects (which can be realized by properly changing the area of the discharge hole of the die head), so that the material is uniformly and moderately puffed, uniform discharge can be realized, and the phenomena of intermittent spray explosion and blockage are avoided.
Claims (10)
1. A screw extrusion device suitable for processing edible mushroom cultivation base materials comprises a feeding machine and a screw extruder, wherein a discharge hole of the feeding machine is communicated with a feed hole of the screw extruder; the feeding machine comprises a feeding motor, a feeding hopper and a feeding screw rod, wherein the feeding hopper is arranged on the feeding screw rod, and a rotating shaft of the feeding motor is connected with the feeding screw rod; the screw extruder comprises a main motor, an extrusion screw, an extrusion die head, a sleeve and an extrusion area heating temperature control system, wherein the extrusion area heating temperature control system is preferably divided into three areas, namely: extrude I district, extrude II districts, the III districts of extrusion sterilization, the motor is used for the drive screw extruder, and the axis of rotation of main motor is connected its characterized in that with screw extruder's extrusion screw: the extrusion die head is a built-in extrusion module which is arranged on the extrusion screw and rotates along with the extrusion screw.
2. Screw extrusion apparatus according to claim 1, wherein: the built-in extrusion module is arranged on an extrusion screw rod at a certain distance in the discharge port of the screw extruder, and is at a certain distance from the discharge port; the built-in extrusion module has certain thickness, is circular when the built-in extrusion module outer edge is rotatory along with extruding the screw rod, leaves certain clearance between circular outer edge and the extrusion screw rod sleeve, opens the die orifice that has different shapes, size and quantity on the built-in extrusion module.
3. Screw extrusion apparatus according to claim 2, wherein: the screw extruder is a double-screw extruder, the built-in extrusion modules are installed on the double-screw extruder in a pair and close to each other, and a certain gap is formed between the two built-in extrusion modules so as to prevent the two built-in extrusion modules from mutual friction collision when the extrusion screws operate.
4. A screw extrusion apparatus according to claim 3, wherein: a0.1-2 mm gap is designed between the two built-in extrusion modules.
5. Screw extrusion apparatus according to claim 1, wherein: the thickness of the die opening part of the built-in extrusion module is 1-30 mm, so that the built-in extrusion module can bear certain high pressure and is not deformed in the extrusion operation of the extrusion screw.
6. Screw extrusion apparatus according to claim 2, wherein: a gap of 0.1-5 mm is reserved between the outermost edge of the built-in extrusion module and the screw sleeve, so that certain internal pressure can be formed in the extrusion operation of the extrusion screw.
7. Screw extrusion apparatus according to claim 2, wherein: the die opening is a notch with a circular shape, a triangular shape, a rectangular shape or other regular or irregular shapes, the die openings are different in size, the number of the die openings is 1-100, and the die openings can adapt to extrusion processing of different edible mushroom culture substrate raw materials in different shapes, sizes and numbers.
8. Screw extrusion apparatus according to claim 1, wherein: the installation position of the built-in extrusion module can be flush with a sleeve of a discharge port of the screw extruder, and can also be installed at a position internally moved by 0-500 mm.
9. A screw extrusion apparatus according to any one of claims 1 to 8, wherein: the screw extruder is a double-screw extruder, the built-in extrusion modules are a pair, the installation positions are flush with the edge of the screw sleeve of the discharge port, the outer edge of each built-in extrusion module is 3mm away from the sleeve, the thickness of the opening part of each module is 30mm, the gap between the two modules is 0.8mm, and 10 semicircular die openings with the diameter of 5mm are formed in the two modules.
10. A screw extrusion apparatus according to any one of claims 1 to 8, wherein: the screw extruder is a double-screw extruder, the built-in extrusion modules are a pair, the distance between the mounting position and the edge of a screw sleeve of the discharge port is 100mm, the gap between the outer edge of each module and the sleeve is 2mm, the thickness of the opening part of each module is 20mm, the gap between each two pieces of modules is 0.3mm, and 20 equilateral triangle dies with the side length of 4mm are arranged on each two pieces of modules.
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| CN110947973A (en) * | 2019-11-07 | 2020-04-03 | 湖南工业大学 | Forming method of hard alloy bar with spiral hole |
| CN110757762A (en) * | 2019-11-11 | 2020-02-07 | 河南省农业科学院 | Solid high-fiber material sterilization device and method thereof |
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