CN114468332B - Forming die for extruder and material extrusion forming and disassembling method thereof - Google Patents
Forming die for extruder and material extrusion forming and disassembling method thereof Download PDFInfo
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- CN114468332B CN114468332B CN202210132847.XA CN202210132847A CN114468332B CN 114468332 B CN114468332 B CN 114468332B CN 202210132847 A CN202210132847 A CN 202210132847A CN 114468332 B CN114468332 B CN 114468332B
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- 239000000463 material Substances 0.000 title claims abstract description 81
- 238000001125 extrusion Methods 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000000465 moulding Methods 0.000 claims abstract description 42
- 238000001816 cooling Methods 0.000 claims description 47
- 230000007246 mechanism Effects 0.000 claims description 17
- 239000002826 coolant Substances 0.000 claims description 15
- 239000012530 fluid Substances 0.000 claims description 10
- 210000001503 joint Anatomy 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 8
- 239000012778 molding material Substances 0.000 claims description 6
- 238000013459 approach Methods 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 2
- 238000007599 discharging Methods 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 230000009466 transformation Effects 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 235000013372 meat Nutrition 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 108010082495 Dietary Plant Proteins Proteins 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000005574 cross-species transmission Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23P—SHAPING OR WORKING OF FOODSTUFFS, NOT FULLY COVERED BY A SINGLE OTHER SUBCLASS
- A23P30/00—Shaping or working of foodstuffs characterised by the process or apparatus
- A23P30/10—Moulding
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23J—PROTEIN COMPOSITIONS FOR FOODSTUFFS; WORKING-UP PROTEINS FOR FOODSTUFFS; PHOSPHATIDE COMPOSITIONS FOR FOODSTUFFS
- A23J3/00—Working-up of proteins for foodstuffs
- A23J3/22—Working-up of proteins for foodstuffs by texturising
- A23J3/225—Texturised simulated foods with high protein content
- A23J3/227—Meat-like textured foods
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23J—PROTEIN COMPOSITIONS FOR FOODSTUFFS; WORKING-UP PROTEINS FOR FOODSTUFFS; PHOSPHATIDE COMPOSITIONS FOR FOODSTUFFS
- A23J3/00—Working-up of proteins for foodstuffs
- A23J3/22—Working-up of proteins for foodstuffs by texturising
- A23J3/26—Working-up of proteins for foodstuffs by texturising using extrusion or expansion
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23P—SHAPING OR WORKING OF FOODSTUFFS, NOT FULLY COVERED BY A SINGLE OTHER SUBCLASS
- A23P30/00—Shaping or working of foodstuffs characterised by the process or apparatus
- A23P30/20—Extruding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
- B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
- B26D1/02—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a stationary cutting member
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D2210/00—Machines or methods used for cutting special materials
- B26D2210/02—Machines or methods used for cutting special materials for cutting food products, e.g. food slicers
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Polymers & Plastics (AREA)
- Food Science & Technology (AREA)
- Health & Medical Sciences (AREA)
- Nutrition Science (AREA)
- Biochemistry (AREA)
- Manufacturing & Machinery (AREA)
- Molecular Biology (AREA)
- Mechanical Engineering (AREA)
- Forests & Forestry (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a forming die for an extruder and a material extrusion forming and disassembling method thereof, and belongs to the technical field of extrusion forming. The molding die for the extruder comprises a base, a die main body and a moving assembly. The die body comprises a die head assembly, an outer cylinder body and an inner cylinder body. The outer cylinder body and the inner cylinder body are coaxially sleeved and form an annular forming runner. And the moving assembly can drive the outer cylinder body to move along the length direction of the inner cylinder body. Compared with the prior art, the annular forming runner can increase the discharging area of the forming runner, so that the efficiency of forming discharging is improved, and the device is suitable for mass production. Simultaneously, the outer barrel is movable, can be convenient for dismouting, easily clear up, adapts to the demand of automatic control's upgrading transformation.
Description
Technical Field
The invention belongs to the technical field of extrusion molding, and particularly relates to a molding die for an extruder and a material extrusion molding and disassembly method thereof.
Background
In recent years, in large environments advocating environmental protection and health, meat analogs have been increasingly sought after by the global market. The wet process for preparing vegetable protein meat is the mainstream method at present. The materials are kneaded, sheared, homogenized and cured by an extruder, and then passed through a forming die.
As described in CN112586792a, a conventional molding die mainly uses a flat cooling tool. The extruded material is cooled and molded by a molding die to form a compact fibrous structure. However, the molding die with such a structure suffers from serious problems in actual production, and in mass production, the flat molding die needs to be manufactured particularly widely if a high discharge speed is to be maintained. In this case, a plurality of fasteners are required to be provided along the longitudinal direction of the molding die in order to maintain the sealing of the molding passage. And once the disassembly maintenance or the cleaning is needed, a plurality of fasteners are required to be disassembled, so that the time and the labor are wasted, and the automation control is difficult to realize.
Therefore, how to improve the existing molding die for the extruder to improve the extrusion molding efficiency and the disassembly and assembly convenience is a problem to be solved.
Disclosure of Invention
The invention provides a forming die for an extruder and a material extrusion forming and dismounting method thereof, which are used for solving the problems in the prior art.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
in a first aspect, there is provided a molding die for an extruder, comprising:
a base;
the die body comprises a die head assembly, an outer cylinder body and an inner cylinder body, wherein one end of the die head assembly is connected with the discharge end of the extruder, and the outer cylinder body and the inner cylinder body are connected with the other end of the die head assembly; the outer cylinder body and the inner cylinder body are coaxially sleeved and form an annular forming runner, and the die head assembly is used for guiding materials extruded by the extruder to the forming runner; a first cooling flow channel for cooling medium circulation is formed in the outer cylinder body, and a second cooling flow channel for cooling medium circulation is formed in the inner cylinder body; the outer cylinder body can move along the length direction of the inner cylinder body;
and the moving assembly is used for moving the outer cylinder body.
In a further embodiment, the mobile assembly comprises:
the support component is arranged on the base and used for supporting the outer cylinder body, and the support component can move along the base;
the driving part comprises a hydraulic cylinder arranged on the base, and the movable end of the hydraulic cylinder is connected with the supporting part.
By adopting the technical scheme: the hydraulic cylinder of the driving part drives the outer cylinder body to move through the driving supporting part, so that the separation of the outer cylinder body and the inner cylinder body is realized, and the forming die is convenient to clean.
In a further embodiment, a supporting rib is arranged on the inner wall of the bottom of the outer cylinder body along the axial direction, and the top of the supporting rib is abutted against the outer wall of the bottom of the inner cylinder body; the top of one end of the outer cylinder body, which is far away from the die head assembly, is provided with a cutter for cutting extruded materials from the forming runner along the axial direction of the outer cylinder body.
By adopting the technical scheme: on one hand, the inner cylinder body of the cantilever structure can be supported through the supporting ribs; simultaneously, the support rib can cut annular materials in the forming runner from the bottom, and finally extruded materials are cut into two parts by combining with the cutter, so that drainage, flattening and conveying are facilitated.
In a further embodiment, the molding die for an extruder further comprises:
and the conveying device is arranged on one side of the base, which is far away from the die head assembly, and is used for receiving the molding material extruded from the molding runner and carrying out preliminary flattening.
By adopting the technical scheme: the conveying device receives the extruded molding materials and flattens the molding materials, so that stacking and backlog bonding of the molding materials are avoided.
In a further embodiment, the delivery device comprises
The conveying bracket is arranged on the base;
the conveying belt is arranged on the conveying bracket; the number of the conveying belts is two, and the cross sections of the conveying surfaces of the two conveying belts along the direction perpendicular to the length direction of the forming runner are of V-shaped structures.
By adopting the technical scheme: the annular material is divided into a left semicircular structure and a right semicircular structure in the extrusion process of the forming runner, a certain overlapping area is formed in the vertical direction, the conveying surface of each conveying belt is an inclined surface due to the design of the conveying belt with the V-shaped structure, a flattening space is formed in the vertical direction and the horizontal direction, and the semicircular material is firstly contacted with the lower end part of the inclined surface in the falling process and is gradually flattened along the inclined surface.
In a further embodiment, the die assembly comprises:
the two ends of the split body extend inwards to form a circular first cavity part and a circular second cavity part respectively, a plurality of extrusion flow passages for communicating the first cavity part and the second cavity part are formed between the first cavity part and the second cavity part, a port of the first cavity part is communicated with a discharge port of the extruder, and a port of the second cavity part is communicated with the forming flow passage;
the diversion cone is coaxially arranged in the first cavity part of the diversion body and is fixed with the diversion body, and a conical flow passage communicated with the extrusion flow passage is formed by the conical surface of the diversion cone and the peripheral surface inner wall of the first cavity part.
By adopting the technical scheme: the material extruded from the extruder is blocked by the guide cone, evenly homogenized along the conical surface of the guide cone, then enters the second cavity part from the conical flow passage through the extrusion flow passage and then evenly enters the forming flow passage, so that the material in the forming flow passage forms an even annular structure, and the shape and the texture are kept better.
In a further embodiment, the end of the split body, which is close to the outer cylinder, is provided with an annular first step; the end part of the outer cylinder body, which is close to the split fluid, is provided with an annular second step, and when the split fluid is in butt joint with the outer cylinder body, hoops are arranged along the circumferences of the first step and the second step so as to connect the split fluid and the outer cylinder body; the end faces of the split body and the outer cylinder body are respectively provided with positioning holes which are equal in number and correspond to each other one by one, and positioning pins are arranged in the positioning holes.
By adopting the technical scheme: the positioning holes are matched with the positioning pins to enable the split fluid to be in precise butt joint with the outer cylinder body; through the cooperation of staple bolt and first step and second step, ensure the inseparable butt joint of minute fluid and urceolus body to avoid the material to spill over.
In a further embodiment, the molding die for an extruder further comprises:
the jacking mechanism comprises a free end capable of moving up and down, and when the outer cylinder body moves to one end of the inner cylinder body far away from the die head assembly along the inner cylinder body, the free end of the jacking mechanism moves upwards and contacts with the outer wall of the inner cylinder body to support the inner cylinder body.
By adopting the technical scheme: when the outer cylinder body is separated from the inner cylinder body, the inner cylinder body becomes a cantilever structure, and at the moment, the free end of the jacking mechanism can ascend to support the inner cylinder body.
In a second aspect, there is provided a material extrusion molding method of a molding die for an extruder, comprising:
the die head assembly is used for homogenizing materials extruded from the discharge end of the extruder and guiding the materials to an annular forming runner, the materials are bonded in the forming runner to form an annular structure, and a notch is formed in the bottom of the annular structure;
cooling medium is continuously supplied into the first cooling flow channel and the second cooling flow channel, annular materials in the forming flow channel are cooled through cold-heat exchange, the materials in the forming flow channel are cooled and formed, and a stable structure is formed;
the annular material is extruded from the molding runner, and a cutter arranged at the end part of the outer cylinder body cuts the annular material from the upper part of the annular material, so that the annular material is separated into two parts and respectively falls onto a conveying device, and the conveying device conducts drainage on the separated material and gradually flattens the separated material.
In a third aspect, there is provided a method for attaching and detaching a molding die for an extruder, comprising:
when the forming die for the extruder needs to be disassembled, the anchor ear is disassembled firstly;
then, the hydraulic cylinder is started, so that the movable end of the hydraulic cylinder pushes the supporting component to drive the outer cylinder body to separate from the split flow body, and the outer cylinder body moves along the length direction of the inner cylinder body; when the outer cylinder moves to one end of the inner cylinder far away from the die head assembly along the inner cylinder, the inner cylinder is supported by the jacking mechanism, and the outer cylinder continues to move until the outer cylinder is completely separated from the inner cylinder;
when the forming die for the extruder is required to be assembled, the hydraulic cylinder is started to gradually approach the outer cylinder body to the inner cylinder body, the outer cylinder body is in butt joint with the split-flow body, and in the process, the support of the jacking mechanism on the inner cylinder body is removed;
and finally installing a hoop.
The beneficial effects are that: the invention provides a molding die for an extruder, which comprises a base, a die main body and a moving assembly. The die body comprises a die head assembly, an outer cylinder body and an inner cylinder body. The outer cylinder body and the inner cylinder body are coaxially sleeved and form an annular forming runner. And the moving assembly can drive the outer cylinder body to move along the length direction of the inner cylinder body. Compared with the prior art, the annular forming runner can increase the discharging area of the forming runner, so that the efficiency of forming discharging is improved, and the device is suitable for mass production. Simultaneously, the outer barrel is movable, can be convenient for dismouting, easily clear up, adapts to the demand of automatic control's upgrading transformation.
Drawings
Fig. 1 is a schematic view of the structure of a molding die for an extruder.
Fig. 2 is a right side view of a molding die for an extruder.
Fig. 3 is a partial cross-sectional view of a molding die for an extruder.
Fig. 4 is a partial view at a in fig. 3.
Fig. 5 is a cross-sectional view at B-B in fig. 3.
FIG. 6 is a schematic diagram of cooling a material when the first and second pipes are rotated in the same direction.
FIG. 7 is a schematic diagram of cooling a material when the first and second conduits are rotated in opposite directions.
Fig. 8 is a left side view of the mold body without the guide cone.
Fig. 9 is a schematic structural view of the conveying device.
Each labeled in fig. 1-9 is: base 1, rail 11, die body 2, die assembly 21, split body 211, first cavity portion 2111, second cavity portion 2112, extrusion runner 2113, annular protrusion 2114, first step 2115, guide cone 212, tapered runner 213, outer cylinder 22, first cooling runner 221, first pipe 2211, second step 222, positioning hole 223, support rib 224, cutter 225, inner cylinder 23, second cooling runner 231, second pipe 2311, molding runner 24, anchor ear 25, positioning pin 26, moving assembly 3, support member 31, driving member 32, hydraulic cylinder 321, hydraulic station 322, jacking mechanism 4, conveying device 5, conveying bracket 51, conveying belt 52.
Detailed Description
The technical scheme of the invention will be clearly and completely described below with reference to the accompanying drawings and examples. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without any inventive effort, are intended to be within the scope of the invention.
It has been found that the existing extruder molding dies mainly employ flat cooling tools. The extruded material is cooled and molded by a molding die to form a compact fibrous structure. However, such a forming die is not efficient in terms of its discharging due to structural limitations, and must be manufactured particularly widely if mass production is to be maintained. Meanwhile, in order to maintain the sealing of the molding passage, a plurality of fasteners are required to be provided in the length direction of the molding die. And once the disassembly maintenance or the cleaning is needed, a plurality of fasteners are required to be disassembled, so that the time and the labor are wasted, and the automation control is difficult to realize. Therefore, how to improve the existing molding die for the extruder to improve the extrusion molding efficiency and the disassembly and assembly convenience is a problem to be solved.
In order to solve the problems, the invention provides a forming die for an extruder and a material extrusion forming and dismounting method thereof.
As shown in fig. 1 to 3, the present embodiment provides an extruder molding die, which includes a base 1, a die main body 2, and a moving assembly 3. Wherein the die body 2 comprises a die head assembly 21, an outer cylinder 22 and an inner cylinder 23. The moving assembly 3 is used for moving the outer cylinder 22 to enable the outer cylinder 22 and the inner cylinder 23 to move relatively.
Referring to fig. 4 and 8, one end of the die head assembly 21 is connected to the discharge end of the extruder, and the other end of the die head assembly 21 is connected to the outer cylinder 22 and the inner cylinder 23. Specifically, die assembly 21 includes a flow divider 211 and a flow cone 212. Wherein, both ends of the split body 211 are respectively provided with circular openings and extend inwards to form a first cavity portion 2111 and a second cavity portion 2112. A plurality of squeeze channels 2113 communicating both are formed between the first chamber portion 2111 and the second chamber portion 2112. The outer port of the first chamber portion 2111 communicates with the discharge port of the extruder. The cone 212 is a conical structure. The diversion cone 212 is coaxially arranged in the first cavity of the diversion body 211 and is fixed with the diversion body 211. The tapered surface of the guide cone 212 and the inner peripheral wall of the first chamber portion 2111 form a tapered flow path 213. The tapered flow channel 213 communicates with the squeeze flow channel 2113. The material extruded from the extruder is blocked by the guide cone 212, uniformly homogenized along the tapered surface of the guide cone 212, and then enters the second chamber portion 2112 from the tapered flow path 213 through the extrusion flow path 2113.
Referring to fig. 5, both the outer cylinder 22 and the inner cylinder 23 have a cylindrical structure, and the outer cylinder 22 and the inner cylinder 23 are coaxially sleeved. The inner diameter of the outer cylinder 22 is larger than the outer diameter of the inner cylinder 23 so that an annular shaped flow channel 24 is formed therebetween. The material extruded from the extruder is directed through a die assembly 21 to a shaping runner 24. Specifically, the outer diameter of the inner cylinder 23 is smaller than the inner diameter of the second chamber portion 2112. An annular protrusion 2114 is provided at the inner end of the second chamber portion 2112, and the inner cylinder 23 extends into the second chamber portion 2112 and abuts the annular protrusion 2114. The inner diameter of the outer cylinder 22 and the inner diameter of the second cavity are equal or substantially equal. The outer cylinder 22 abuts against an end of the split body 211 remote from the first chamber portion 2111. Thereby placing the outer port of the second chamber portion 2112 in communication with the molding runner 24. Accordingly, the material entering the second chamber portion 2112 is then uniformly guided to the forming runner 24, and forms a uniform annular structure in the forming runner 24, while forming a stable texture. Compared with a flat forming die, the annular forming runner 24 can enlarge the discharging area of the forming runner 24 in a limited space, so that the efficiency of forming and discharging is improved, and the forming die is suitable for mass production.
In order to facilitate the above-mentioned material forming process, a first cooling flow channel 221 for circulating a cooling medium is formed inside the outer cylinder 22. Meanwhile, a second cooling flow passage 231 for circulating a cooling medium is formed inside the inner cylinder 23. The first cooling flow path 221 and the second cooling flow path 231 operate independently. By continuously supplying cooling medium into the first cooling flow channel 221 and the second cooling flow channel 231, the material in the forming flow channel 24 is cooled by heat exchange, so that high-temperature material cooling forming is promoted, and stable texture is formed. The temperature of the cooling medium after heat exchange is increased, and the cooling medium is discharged. The cooling medium may be liquid or gas. Preferably, the cooling medium may be water.
The cooling runner of the flat forming die in the prior art mostly adopts a straight line along the length direction of the forming die or an annular space along the circumferential direction of the forming die, and then is communicated with a water inlet pipe and a water outlet pipe. Although the cooling flow passage with the structure can play a certain role in cooling. The cooling flow passage forms a space having a cross section generally larger than the cross sections of the inlet pipe and the outlet pipe. Therefore, the water entering from the water inlet pipe forms vortex in the cooling flow passage, and the first-in first-out is not ensured. The water which enters firstly heats up in the heat exchange process and is discharged firstly, so that the cooling effect can be ensured. Referring to fig. 6 and 7, in the present embodiment, the first cooling flow channel 221 adopts a spiral first pipe 2211, and the inlet and outlet of the first pipe 2211 are located at one end of the outer barrel away from the die head assembly 21. Specifically, the first tube 2211 is formed by double-strand spiral winding. The second cooling flow channel 231 adopts a spiral second pipeline 2311, and a feed inlet and a discharge outlet of the second pipeline 2311 are both positioned at one end of the inner barrel far away from the die head assembly 21. And, the second pipe 2311 is also double-stranded spirally wound. On the one hand, the spiral structure can enable the cooling medium to be first in and first out, and the cooling effect is ensured. On the other hand, the first cooling flow channel 221 and the second cooling flow channel 231 cool down the annular material from the two sides, and further improve the cooling effect. The spiral directions of the first cooling flow channel 221 and the second cooling flow channel 231 in this embodiment may be the same or opposite. Preferably, the spiral directions of the first cooling flow channel 221 and the second cooling flow channel 231 are opposite. When the spiral direction is the same, the shaping material can produce the temperature difference along circumference, leads to the cooling rate of material to produce the difference, influences the texture of material. When the spiral directions are opposite, the first cooling flow channel 221 and the second cooling flow channel 231 can be complementary, so that the temperature difference of the molding materials in the circumferential direction is reduced as much as possible, the difference of cooling rates is further reduced, and the texture of the materials is kept stable.
It has been mentioned hereinabove that the outer cylinder 22 is movable relative to the inner cylinder 23, and that a particular outer cylinder 22 is movable along the length of the inner cylinder 23. In this embodiment, the outer cylinder 22 and the split body 211 are detachably connected. The end of the split body 211 near the outer cylinder 22 is provided with an annular first step 2115. Meanwhile, the end of the outer cylinder 22 near the split body 211 is provided with an annular second step 222. When the split body 211 is docked with the outer cylinder 22, the anchor ear 25 is circumferentially disposed along the first step 2115 and the second step 222 to connect the split body 211 with the outer cylinder 22. By the cooperation of the anchor ear 25 with the first step 2115 and the second step 222, the tight butt joint of the split body 211 and the outer cylinder 22 is ensured, so that the material is prevented from overflowing. Meanwhile, in order to prevent the outer cylinder 22 and the split body 211 from generating circumferential rotation errors, the end surfaces of the split body 211 and the outer cylinder 22 which are in butt joint are respectively provided with positioning holes 223 which are equal in number and correspond to each other one by one. By providing the positioning pin 26 in the positioning hole 223, the positioning hole 223 and the positioning pin 26 are matched, so that the fluid 211 and the outer cylinder 22 are precisely abutted.
Referring to fig. 8, the driving assembly in the present embodiment includes a supporting member 31 and a driving member 32. Wherein, the supporting member 31 is fixedly connected with the outer cylinder 22 for supporting the outer cylinder 22. The support member 31 is provided on the base 1 and is movable along the base 1. The driving member 32 includes a hydraulic cylinder 321 provided on the base 1, and a movable end of the hydraulic cylinder 321 is connected to the supporting member 31. The support member 31 can be driven to move along the base 1 by the hydraulic cylinder 321, and the outer cylinder 22 can be moved. Specifically, the base 1 is provided with a rail 11. The support member 31 may be slidably engaged with the rail 11. Of course, the bottom of the supporting component 31 may also be provided with a roller mechanism adapted to the track 11, so as to realize rolling fit of the supporting component 31 and the base 1. When the anchor ear 25 is disassembled, the hydraulic cylinder 321 of the driving part 32 drives the outer cylinder 22 to move through the driving support part 31, so that the outer cylinder 22 and the inner cylinder 23 are gradually separated and finally separated, and the outer wall of the inner cylinder of the forming die and the inner wall of the outer cylinder 22 are conveniently cleaned. Compared with the prior art, the length direction along the forming die is provided with a plurality of fastener structures, the technical scheme provided by the embodiment can greatly reduce the complexity of manual operation, and is time-saving and labor-saving. Meanwhile, the automatic separation of the outer cylinder 22 and the inner cylinder 23 can be realized through the automatic control of the hydraulic cylinder 321, so that the automatic upgrading and transformation of equipment are facilitated. In order for the hydraulic cylinder 321 to work properly, a hydraulic station 322 connected to the hydraulic cylinder 321 should also be provided. Of course, the pushing of the outer cylinder 22 should not be limited to the hydraulic pushing scheme, and other schemes such as a servo cylinder, a rack and pinion transmission, and a lead screw traction can be adopted.
When the outer cylinder 22 is separated from the inner cylinder 23, the inner cylinder 23 becomes a cantilever structure, and its primary support is converted into a force to split the fluid 211. To solve this problem, in the present embodiment, the molding die for an extruder further includes a jacking mechanism 4. The jacking mechanism 4 includes a free end that is movable up and down. When the outer cylinder 22 moves along the inner cylinder 23 to an end of the inner cylinder 23 away from the die head assembly 21, the free end of the jacking mechanism 4 moves upward and contacts the outer wall of the inner cylinder 23 to support the inner cylinder 23. The jacking mechanism 4 in the present embodiment may employ a hydraulic cylinder.
When the outer cylinder 22 is fixedly connected with the split body 211, a forming runner 24 is arranged between the outer cylinder 22 and the inner cylinder, and the inner cylinder 23 is in a cantilever state. Therefore, in this embodiment, the support ribs 224 along the length direction of the outer cylinder 22 are provided on the bottom inner wall of the outer cylinder 22. The top of the supporting rib 224 is abutted against the outer wall of the bottom of the inner cylinder 23, the inner cylinder 23 is supported by the supporting rib 224, the supporting force is distributed to the outer cylinder 22, and then the supporting force is transferred to the base 1 by the supporting component 31. Simultaneously, the supporting ribs 224 can cut the annular material in the forming runner 24 from the bottom, so that the annular material forms a notch at the bottom. In addition, the top of the end of the outer barrel 22 remote from the die assembly 21 is provided with a cutter 225. The material extruded from the forming channel is cut by the cutter from the top in the axial direction of the outer cylinder. The material finally extruded from the forming runner 24 is cut into two parts by the supporting ribs 224 and the cutters 225, thereby facilitating drainage and flattening transportation.
In a further embodiment, in connection with fig. 9, the forming die for the extruder further comprises a conveyor 5 for receiving the formed material extruded from the forming runner 24 and performing a preliminary flattening. The conveyor 5 is arranged on the side of the base 1 remote from the die assembly 21. The conveyor 5 prevents the formed material from piling up and sticking. Specifically, the conveying device 5 includes a conveying bracket 51 provided on the base 1, and a conveying belt 52 provided on the conveying bracket 51. The number of the conveyor belts 52 is two. The conveying surfaces of the two conveyor belts 52 have a V-shaped cross section perpendicular to the length direction of the molding flow path 24. When the annular material is extruded from the forming runner 24, the annular material is divided into a left semicircular structure and a right semicircular structure, the two semicircular structures have a certain overlapping area in the vertical direction, the conveying surface of each conveying belt 52 is an inclined surface due to the design of the conveying belt 52 with the V-shaped structure, a flattening space is reserved in the vertical direction and the horizontal direction, and a part of the semicircular material, which is close to the lower end, is firstly contacted with the lower end part of the inclined surface in the falling process and is gradually flattened along the inclined surface. Preferably, the average height of the end of the conveyor belt 52 adjacent the forming runner 24 is greater than the average height of the end of the conveyor belt 52 remote from the forming runner 24. And, the angle of the V-shaped included angle of the two conveyor belts 52 near the end of the forming runner 24 is smaller than the angle of the V-shaped included angle of the end far from the forming runner 24. The advantage of this arrangement is that the two conveyor belts 52 can better receive the cut material. And moreover, the angle of the V-shaped included angle gradually becomes larger, so that the received materials are gradually flattened, and the materials are prevented from being stacked due to the angle of the V-shaped included angle.
Working principle: when the material extruded by the extruder is required to be cooled and molded, the material extruded from the discharge end of the extruder is homogenized by the die head assembly 21 and guided to the molding runner 24 which is formed into a ring shape. The material is bonded within the forming runner 24 to form an annular structure that forms a gap at the bottom. The first cooling flow channel 221 and the second cooling flow channel 231 continuously supply cooling medium, and cool the annular material in the forming flow channel 24 through cold-heat exchange, so that the material in the forming flow channel 24 is cooled and formed, and a stable structure is formed. The annular material is extruded from the forming runner 24, and the cutter 225 arranged at the end part of the outer cylinder 22 cuts the annular material from the upper part of the annular material along the axial direction of the outer cylinder, so that the annular material is separated into two parts and respectively falls onto the conveying device 5, and the conveying device 5 drains the separated material and gradually flattens the separated material.
When maintenance and cleaning of the extruder forming die is required, the anchor ear 25 is first disassembled. Then, the hydraulic cylinder 321 is started, so that the movable end of the hydraulic cylinder pushes the supporting component 31 to drive the outer cylinder 22 to separate from the split body 211, and the outer cylinder 22 moves along the length direction of the inner cylinder 23 and gradually separates from the inner cylinder 23. When the outer cylinder 22 moves along the inner cylinder 23 to an end of the inner cylinder 23 away from the die assembly 21, the inner cylinder 23 is supported by the jack mechanism 4. When the outer cylinder 22 is completely separated from the inner cylinder 23, the inner wall of the outer cylinder 22 and the outer wall of the inner cylinder 23 can be cleaned and maintained. After the cleaning is completed, the hydraulic cylinder 321 is started again, so that the outer cylinder 22 and the inner cylinder 23 gradually approach each other, and the outer cylinder 22 is butted with the split body 211. In this process, the support of the inner cylinder 23 by the jacking mechanism 4 is removed. Finally, a hoop 25 is installed.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A molding die for an extruder, comprising:
a base;
the die body comprises a die head assembly, an outer cylinder body and an inner cylinder body, wherein one end of the die head assembly is connected with the discharge end of the extruder, and the outer cylinder body and the inner cylinder body are connected with the other end of the die head assembly; the outer cylinder body and the inner cylinder body are coaxially sleeved and form an annular forming runner; the die head assembly is used for guiding the material extruded by the extruder to the forming runner; a first cooling flow channel for cooling medium circulation is formed in the outer cylinder body, and a second cooling flow channel for cooling medium circulation is formed in the inner cylinder body; the outer cylinder body can move along the length direction of the inner cylinder body; the inner wall of the bottom of the outer cylinder body is axially provided with a supporting rib, and the top of the supporting rib is abutted against the outer wall of the bottom of the inner cylinder body; the top of one end of the outer cylinder, which is far away from the die head assembly, is provided with a cutter for cutting the extruded material from the forming runner along the axial direction of the outer cylinder;
and the moving assembly is used for moving the outer cylinder body.
2. The molding die for an extruder according to claim 1, wherein the moving assembly comprises:
the support component is arranged on the base and used for supporting the outer cylinder body, and the support component can move along the base;
the driving part comprises a hydraulic cylinder arranged on the base, and the movable end of the hydraulic cylinder is connected with the supporting part.
3. The forming die for the extruder of claim 1 wherein the first cooling flow passage is a first spiral pipe, the feed inlet and the discharge outlet of the first pipe are both positioned at one end of the outer barrel away from the die head assembly, and the first pipe is in a double-strand spiral winding mode; the second cooling flow passage adopts a spiral second pipeline, a feed inlet and a discharge outlet of the second pipeline are both positioned at one end of the inner barrel, which is far away from the die head assembly, and the second pipeline also adopts a double-strand spiral winding mode; the spiral directions of the first cooling flow channel and the second cooling flow channel are opposite.
4. The molding die for an extruder according to claim 1, further comprising:
and the conveying device is arranged on one side of the base, which is far away from the die head assembly, and is used for receiving the molding material extruded from the molding runner and carrying out preliminary flattening.
5. The molding die for an extruder according to claim 4, wherein the conveying means comprises:
the conveying bracket is arranged on the base;
the conveying belt is arranged on the conveying bracket; the number of the conveying belts is two, and the cross sections of the conveying surfaces of the two conveying belts along the direction perpendicular to the length direction of the forming runner are of V-shaped structures.
6. The molding die for an extruder according to claim 1, wherein the die assembly comprises:
the two ends of the split body extend inwards to form a circular first cavity part and a circular second cavity part respectively, a plurality of extrusion flow passages for communicating the first cavity part and the second cavity part are formed between the first cavity part and the second cavity part, a port of the first cavity part is communicated with a discharge port of the extruder, and a port of the second cavity part is communicated with the forming flow passage;
the diversion cone is coaxially arranged in the first cavity part of the diversion body and is fixed with the diversion body, and a conical flow passage communicated with the extrusion flow passage is formed by the conical surface of the diversion cone and the peripheral surface inner wall of the first cavity part.
7. The molding die for an extruder according to claim 6, wherein an end portion of the split body, which is close to the outer cylinder, is provided with an annular first step; the end part of the outer cylinder body, which is close to the split fluid, is provided with an annular second step, and when the split fluid is in butt joint with the outer cylinder body, hoops are arranged along the circumferences of the first step and the second step so as to connect the split fluid and the outer cylinder body; the end faces of the split body and the outer cylinder body are respectively provided with positioning holes which are equal in number and correspond to each other one by one, and positioning pins are arranged in the positioning holes.
8. The molding die for an extruder according to claim 1, further comprising:
the jacking mechanism comprises a free end capable of moving up and down, and when the outer cylinder body moves to one end of the inner cylinder body far away from the die head assembly along the inner cylinder body, the free end of the jacking mechanism moves upwards and contacts with the outer wall of the inner cylinder body to support the inner cylinder body.
9. A material extrusion molding method of a molding die for an extruder according to any one of claims 1 to 8, comprising:
the die head assembly is used for homogenizing materials extruded from the discharge end of the extruder and guiding the materials to an annular forming runner, the materials are bonded in the forming runner to form an annular structure, and a notch is formed in the bottom of the annular structure;
cooling medium is continuously supplied into the first cooling flow channel and the second cooling flow channel, annular materials in the forming flow channel are cooled through cold-heat exchange, the materials in the forming flow channel are cooled and formed, and a stable structure is formed;
the annular material is extruded from the molding runner, and a cutter arranged at the end part of the outer cylinder body cuts the annular material from the upper part of the annular material, so that the annular material is separated into two parts and respectively falls onto a conveying device, and the conveying device conducts drainage on the separated material and gradually flattens the separated material.
10. The method for attaching and detaching the molding die for an extruder according to any one of claims 1 to 8, comprising:
when the forming die for the extruder needs to be disassembled, the anchor ear is disassembled firstly;
then, the hydraulic cylinder is started, so that the movable end of the hydraulic cylinder pushes the supporting component to drive the outer cylinder body to separate from the split flow body, and the outer cylinder body moves along the length direction of the inner cylinder body; when the outer cylinder moves to one end of the inner cylinder far away from the die head assembly along the inner cylinder, the inner cylinder is supported by the jacking mechanism, and the outer cylinder continues to move until the outer cylinder is completely separated from the inner cylinder;
when the forming die for the extruder is required to be assembled, the hydraulic cylinder is started to gradually approach the outer cylinder body to the inner cylinder body, the outer cylinder body is in butt joint with the split-flow body, and in the process, the support of the jacking mechanism on the inner cylinder body is removed;
and finally installing a hoop.
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| CN202210132847.XA CN114468332B (en) | 2022-02-14 | 2022-02-14 | Forming die for extruder and material extrusion forming and disassembling method thereof |
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| CN202210132847.XA CN114468332B (en) | 2022-02-14 | 2022-02-14 | Forming die for extruder and material extrusion forming and disassembling method thereof |
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| CN114468332A (en) | 2022-05-13 |
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