CN114770935B - Plastic extrusion device for 3D molding - Google Patents
Plastic extrusion device for 3D molding Download PDFInfo
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- CN114770935B CN114770935B CN202210211341.8A CN202210211341A CN114770935B CN 114770935 B CN114770935 B CN 114770935B CN 202210211341 A CN202210211341 A CN 202210211341A CN 114770935 B CN114770935 B CN 114770935B
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- 238000001125 extrusion Methods 0.000 title claims abstract description 86
- 229920003023 plastic Polymers 0.000 title claims abstract description 40
- 239000004033 plastic Substances 0.000 title claims abstract description 40
- 238000000465 moulding Methods 0.000 title claims abstract description 15
- 238000002844 melting Methods 0.000 claims abstract description 36
- 238000010438 heat treatment Methods 0.000 claims abstract description 35
- 230000008018 melting Effects 0.000 claims abstract description 35
- 230000005540 biological transmission Effects 0.000 claims description 32
- 230000003139 buffering effect Effects 0.000 claims description 11
- 238000007639 printing Methods 0.000 abstract description 6
- 230000009471 action Effects 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000009434 installation Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000010146 3D printing Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B13/00—Conditioning or physical treatment of the material to be shaped
- B29B13/02—Conditioning or physical treatment of the material to be shaped by heating
- B29B13/022—Melting the material to be shaped
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
- B29C64/295—Heating elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/30—Auxiliary operations or equipment
- B29C64/307—Handling of material to be used in additive manufacturing
- B29C64/314—Preparation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/30—Auxiliary operations or equipment
- B29C64/307—Handling of material to be used in additive manufacturing
- B29C64/321—Feeding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y40/00—Auxiliary operations or equipment, e.g. for material handling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y40/00—Auxiliary operations or equipment, e.g. for material handling
- B33Y40/10—Pre-treatment
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Optics & Photonics (AREA)
- Thermal Sciences (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a plastic extrusion device for 3D molding, which comprises an input device, a melting and conveying device, a buffer feeding device, an extrusion device and an extrusion head; the invention has the advantages of reasonable and simple structure, low production cost, convenient installation and complete functions, the input device arranged in the invention can continuously convey the plastic belt into the circular cavity to withstand the outer surface of the conveying heat conducting wheel for heating and melting, and simultaneously, the input device is matched with the rotation of the conveying heat conducting wheel, thereby not only meeting the requirement of continuously heating and melting the plastic belt, but also being beneficial to continuously conveying the melted plastic into the buffer cavity for buffer storage through the conveying channel, thereby meeting the stability and reliability of feeding at different printing speeds; the extrusion head provided by the invention can ensure that the two valve cores can be tightly propped together under the action of the second spring when not extruding, thereby avoiding the leakage of melted plastics to influence the quality of products.
Description
Technical Field
The invention relates to the technical field of 3D forming equipment, in particular to a plastic extrusion device for 3D forming.
Background
3D printing is also called rapid prototyping, namely, putting data and raw materials into a 3D printer, printing out the products layer by layer through computer program control, and finally forming the finished product. 3D printing has become a trend, and is widely applied to the design field, especially industrial design, digital product die sinking and the like, and the printing of a die can be completed within a few hours, so that the time from development to market of a plurality of products is saved. At present, most of molding raw materials of the 3D printer are plastics, and the plastics are required to be melted firstly and then solidified and molded on a bottom plate after being sprayed out through a spray head; the plastic melting efficiency input by the existing 3D molding plastic extrusion device is low and uneven, so that the plastic extrusion feeding is affected, and the plastic extrusion device is easy to leak materials, so that the quality of products is affected.
Disclosure of Invention
The invention aims to solve the problems that the plastic extrusion device for 3D molding is low in melting efficiency and uneven in plastic input by the existing plastic extrusion device for 3D molding, so that the supply during plastic extrusion is affected, and the plastic extrusion device is easy to leak, so that the quality of a product is affected.
In order to solve the problems, the invention provides a technical scheme that: a plastic extrusion device for 3D molding is characterized in that: comprises an input device, a melting and conveying device, a buffering and feeding device, an extruding and conveying device and an extruding head; the input device is fixedly connected to the left upper side of the squeezing device; the top of the melting conveying device is fixedly connected with the bottom of the input device, the right side of the melting conveying device is fixedly connected to the left side of the extrusion conveying device, an inlet at the upper side of the melting conveying device is connected with an outlet at the lower side of the input device, and the bottom of the melting conveying device is fixedly connected with a buffering feeding device; the upper inlet of the buffer feeding device is connected with the lower outlet of the melting conveying device, and the right outlet of the buffer feeding device is connected with the left inlet of the extruding conveying device; and an extrusion head is fixedly connected to the outlet of the lower side of the extrusion device.
Preferably, the specific structure of the input device comprises an input shell, a guide hole, an inner cavity, a driven roller, a driving roller and a motor I; the right side of the input shell is internally provided with a vertical guide hole, the right lower side of the input shell is internally provided with an inner cavity, the inner cavity is communicated with the inner part of the guide hole, and the outer part of the rear side of the input shell is fixedly connected with a first motor; the driven roller is movably connected to the right side of the inner cavity; the driving roller is movably connected to the left side of the inner cavity, and the center of the rear side of the driving roller is fixedly connected with an output shaft of the motor.
Preferably, the first motor is a servo motor or a stepping motor.
Preferably, the specific structure of the melting and conveying device comprises a conveying shell, a first heating rod, a conveying heat conduction wheel, a second motor, a conveying channel and a circular cavity; the inside of the conveying shell is provided with a circular cavity, and the outside of the rear side of the conveying shell is fixedly connected with a second motor; the inside of the circular cavity is movably connected with a conveying heat conducting wheel, the center of the rear side of the conveying heat conducting wheel is fixedly connected with a second output shaft of the motor, and the right side of the circular cavity is provided with a conveying channel; the first heating rods are arranged in a circular arc shape and are respectively and fixedly connected to the inside of the conveying shell around the circular cavity; the upper inlet of the conveying channel is connected with the lower outlet of the input device, and the lower outlet of the conveying channel is connected with the middle inlet of the upper side of the buffer feeding device.
Preferably, the specific structure of the buffering feeding device comprises a feeding shell, an end cover, a motor III, a transmission shaft I, a spring I, a buffering cavity, a piston, an input port, a feeding hole, a feeding screw rod and a heating rod II; a transverse buffer cavity is arranged in the center of the left side of the feeding shell, a transverse feeding hole is arranged in the center of the right side of the feeding shell, and an outlet on the right side of the feeding hole is connected with an inlet on the left side of the extruding device; an end cover is fixedly connected to the opening at the left side of the buffer cavity, an input port is arranged at the right upper side of the buffer cavity, and the input port is connected with an outlet at the lower side of the melting conveying device; the left side of the end cover is fixedly connected to a motor III; the left side outer part of the transmission shaft is movably connected to the inside of the center of the end cover, the left side center of the transmission shaft is fixedly connected with the three right side output shafts of the motor, and the right side outer part of the transmission shaft is movably connected to the center of the buffer cavity; the outer part of the piston is transversely and movably connected to the left side of the inner part of the buffer cavity, the inner part of the center of the piston is movably connected to the outer part of the transmission shaft I, and a spring I is arranged between the inner part of the left side of the piston and the right side surface of the end cover; the feeding screw rod is movably connected inside the feeding hole, and the left end part of the feeding screw rod is fixedly connected with the right end part of the transmission shaft; the second heating rods are uniformly arranged around the outer sides of the feeding holes, and are uniformly and fixedly connected inside the periphery of the right side of the feeding shell.
Preferably, the left side of the feeding hole is in a horn mouth shape.
Preferably, the specific structure of the extruding and conveying device comprises an extruding and conveying shell, a motor IV, a transmission shaft II, a feeding port, an extruding and conveying screw rod, a heating rod III and an extruding and conveying hole; the motor IV is fixedly connected to the inside of the upper side of the extruding and conveying shell, and an extruding and conveying hole is formed in the inside of the lower side of the extruding and conveying shell; the upper left side of the extrusion hole is provided with a feed inlet, the feed inlet is connected with a right side outlet of the buffering feeding device, and a lower side outlet of the extrusion hole is connected with an upper side inlet of the extrusion head; the second transmission shaft is movably connected in a vertical hole arranged on the upper side of the extrusion hole, and the center of the upper side of the second transmission shaft is fixedly connected with the output shaft of the fourth motor; the extrusion screw rod is movably connected inside the extrusion hole, and the upper end part of the extrusion screw rod is fixedly connected with the lower end part of the transmission shaft II; the third heating rods are uniformly positioned around the extrusion holes, and are uniformly and fixedly connected inside the periphery of the lower side of the extrusion shell.
Preferably, the fourth motor is a servo motor or a stepping motor.
Preferably, the specific structure of the extrusion head comprises an extrusion shell, a groove, a second spring, a valve core, a half-cone hole and an extrusion hole; an extrusion hole is formed in the center of the extrusion shell; grooves are formed in the left side and the right side of the upper side of the extrusion hole; the two valve cores are respectively and movably connected in the corresponding grooves, half-cone holes are formed in the upper surfaces between the two valve cores and the inner sides of the two valve cores, and springs II are arranged between the inner sides of the two valve cores and the corresponding grooves.
The invention has the beneficial effects that:
(1) The invention has the advantages of reasonable and simple structure, low production cost, convenient installation and complete functions, the input device arranged in the invention can continuously convey the plastic belt into the circular cavity to withstand the outer surface of the conveying heat conducting wheel for heating and melting, and simultaneously, the input device is matched with the rotation of the conveying heat conducting wheel, thereby not only meeting the requirement of continuously heating and melting the plastic belt, but also being beneficial to continuously conveying the melted plastic into the buffer cavity for buffer storage through the conveying channel, thereby meeting the stability and reliability of feeding at different printing speeds.
(2) The extrusion head provided by the invention can ensure that the two valve cores can be tightly propped together under the action of the second spring when not being extruded, thereby avoiding the leakage of melted plastics and influencing the quality of products.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic structural diagram of the input device.
Fig. 3 is a schematic view of the structure of the melting conveyor.
Fig. 4 is a schematic structural view of a buffering feeding device.
Fig. 5 is a schematic structural view of the extruding device.
FIG. 6 is a schematic diagram of the structure of an extrusion head.
1-an input device; 2-melting and conveying device; 3-buffering feeding device; 4-extruding and conveying device; 5-an extrusion head; 11-an input housing; 12-a guide hole; 13-lumen; 14-a driven roller; 15-a driving roller; 16-motor one; 21-a conveying housing; 22-heating rod I; 23-conveying a heat conducting wheel; 24-a second motor; 25-conveying channels; 26-a circular cavity; 31-a feed housing; 32-end caps; 33-motor three; 34-transmission shaft I; 35-spring one; 36-a buffer chamber; 37-piston; 38-an input port; 39-a feeding hole; 310-feeding screw; 311-heating rod II; 41-extruding a shell; 42-motor four; 43-transmission shaft II; 44-a feed inlet; 45-extruding a screw rod; 46-heating rod III; 47-extruding holes; 51-extrusion housing; 52-grooves; 53-spring two; 54-valve core; 55-half cone holes; 56-extrusion orifice.
Detailed Description
As shown in fig. 1, the present embodiment adopts the following technical scheme: a plastic extrusion device for 3D molding, which comprises an input device 1, a melting and conveying device 2, a buffer feeding device 3, an extrusion and conveying device 4 and an extrusion head 5; the input device 1 is fixedly connected to the left upper side of the squeezing device 4; the top of the melting and conveying device 2 is fixedly connected with the bottom of the input device 1, the right side of the melting and conveying device 2 is fixedly connected to the left side of the extrusion device 4, an inlet at the upper side of the melting and conveying device 2 is connected with an outlet at the lower side of the input device 1, and the bottom of the melting and conveying device 2 is fixedly connected with a buffer feeding device 3; the upper inlet of the buffer feeding device 3 is connected with the lower outlet of the melting and conveying device 2, and the right outlet of the buffer feeding device 3 is connected with the left inlet of the extruding and conveying device 4; the extrusion head 5 is fixedly connected to the outlet of the lower side of the extrusion device 4.
As shown in fig. 2, the specific structure of the input device 1 includes an input housing 11, a guide hole 12, an inner cavity 13, a driven roller 14, a driving roller 15 and a motor one 16; the right side of the input shell 11 is internally provided with a vertical guide hole 12, the right lower side of the input shell 11 is internally provided with an inner cavity 13, the inner cavity 13 is communicated with the inner part of the guide hole 12, and the outer part of the rear side of the input shell 11 is fixedly connected with a first motor 16; the driven roller 14 is movably connected to the right side of the inner cavity 13; the driving roller 15 is movably connected to the left side of the inner cavity 13, and the center of the rear side of the driving roller 15 is fixedly connected with the output shaft of the motor I16.
Wherein, the first motor 16 is a servo motor or a stepping motor, thereby facilitating the automatic control by the prior art.
As shown in fig. 3, the specific structure of the melting and conveying device 2 includes a conveying housing 21, a first heating rod 22, a conveying heat conducting wheel 23, a second motor 24, a conveying channel 25 and a circular cavity 26; the inside of the conveying shell 21 is provided with a circular cavity 26, and the outside of the rear side of the conveying shell 21 is fixedly connected with a motor II 24; the inside of the circular cavity 26 is movably connected with a conveying heat conducting wheel 23, the center of the rear side of the conveying heat conducting wheel 23 is fixedly connected with the output shaft of a motor II 24, and the right side of the circular cavity 26 is provided with a conveying channel 25; the first heating rods 22 are a plurality of, and the first heating rods 22 are all arranged in a circular arc shape and are respectively and fixedly connected in the conveying shell 21 around the circular cavity 26; the upper inlet of the conveying channel 25 is connected with the lower outlet of the input device 1, and the lower outlet of the conveying channel 25 is connected with the upper middle inlet of the buffer feeding device 3.
As shown in fig. 4, the specific structure of the buffering feeding device 3 includes a feeding housing 31, an end cover 32, a third motor 33, a first transmission shaft 34, a first spring 35, a buffering cavity 36, a piston 37, an input port 38, a feeding hole 39, a feeding screw 310 and a second heating rod 311; a transverse buffer cavity 36 is arranged in the center of the left side of the feeding shell 31, a transverse feeding hole 39 is arranged in the center of the right side of the feeding shell 31, and the outlet of the right side of the feeding hole 39 is connected with the inlet of the left side of the extruding and conveying device 4; an end cover 32 is fixedly connected to the left opening of the buffer cavity 36, an input port 38 is arranged on the upper right side of the buffer cavity 36, and the input port 38 is connected with the lower outlet of the melting and conveying device 2; the left side of the end cover 32 is fixedly connected to a third motor 33; the left outer part of the first transmission shaft 34 is movably connected to the inside of the center of the end cover 32, the center of the left side of the first transmission shaft 34 is fixedly connected with the right output shaft of the third motor 33, and the right outer part of the first transmission shaft 34 is movably connected to the center of the buffer cavity 36; the outside of the piston 37 is transversely and movably connected to the left side of the inside of the buffer cavity 36, the inside of the center of the piston 37 is movably connected to the outside of the transmission shaft I34, and a spring I35 is arranged between the inside of the left side of the piston 37 and the right side of the end cover 32; the feeding screw rod 310 is movably connected inside the feeding hole 39, and the left end part of the feeding screw rod 310 is fixedly connected with the right end part of the first transmission shaft 34; the second heating rods 311 are uniformly located around the outer side of the feeding hole 39, and the second heating rods 311 are uniformly and fixedly connected inside the periphery of the right side of the feeding shell 31.
Wherein the left side of the feed hole 39 is bell-mouthed in shape, thereby facilitating the entry of melted plastic into the feed hole 39.
As shown in fig. 5, the specific structure of the extruding device 4 includes an extruding shell 41, a motor four 42, a transmission shaft two 43, a feed inlet 44, an extruding screw 45, a heating rod three 46 and an extruding hole 47; the upper side of the squeezing shell 41 is fixedly connected with a motor IV 42, and the lower side of the squeezing shell 41 is internally provided with a squeezing hole 47; a feed inlet 44 is formed in the upper left side of the extrusion hole 47, the feed inlet 44 is connected with the right side outlet of the buffer feeding device 3, and the lower side outlet of the extrusion hole 47 is connected with the upper side inlet of the extrusion head 5; the second transmission shaft 43 is movably connected in a vertical hole arranged on the upper side of the extrusion hole 47, and the center of the upper side of the second transmission shaft 43 is fixedly connected with an output shaft on the lower side of the fourth motor 42; the extruding and conveying screw rod 45 is movably connected inside the extruding and conveying hole 47, and the upper end part of the extruding and conveying screw rod 45 is fixedly connected with the lower end part of the transmission shaft II 43; the third heating rods 46 are uniformly located around the extrusion hole 47, and the third heating rods 46 are uniformly and fixedly connected to the inside of the periphery of the lower side of the extrusion shell 41.
Wherein, motor IV 42 is servo motor or step motor to be convenient for carry out automated control through current technique.
As shown in fig. 6, the specific structure of the extrusion head 5 includes an extrusion housing 51, a groove 52, a second spring 53, a valve core 54, a half-cone hole 55 and an extrusion hole 56; an extrusion hole 56 is formed in the center of the extrusion shell 51; grooves 52 are formed in the left and right sides of the upper side of the extrusion hole 56; the two valve cores 54 are respectively and movably connected in the corresponding grooves 52, half taper holes 55 are respectively formed on the upper surfaces between the opposite inner sides of the two valve cores 54, and springs II 53 are respectively arranged between the opposite outer sides of the two valve cores 54 and the corresponding grooves 52.
The use state of the invention is as follows: the invention has the advantages of reasonable and simple structure, low production cost, convenient installation and complete functions, when in use, firstly, a plastic belt is inserted into the guide hole 12, then the motor I16 is started to drive the driving roller 15 to rotate clockwise to convey the plastic belt into the melting conveying device 2 for melting conveying, meanwhile, the motor II 24 is electrified to rotate and the heating rod I22 is electrified to heat, the heating rod I22 can transmit heat to the inside of the circular cavity 26 and the conveying heat conducting wheel 23, the rotation of the motor II 24 drives the heated conveying heat conducting wheel 23 to rotate clockwise, the input device 1 arranged at the position can continuously convey the plastic belt into the circular cavity 26 to bear the outer surface of the conveying heat conducting wheel 23 for heating and melting, and simultaneously, the rotation of the conveying heat conducting wheel 23 is matched, the plastic belt is heated and melted continuously, melted plastic is conveyed into the buffer cavity 36 continuously through the conveying channel 25 for buffer storage, so that the stability and reliability of feeding at different printing speeds are met, the feeding screw 310 is driven to rotate by the third starting motor 33 through the first transmission shaft 34, melted plastic in the buffer cavity 36 can be conveyed into the extrusion hole 47, the extrusion screw 45 is driven to rotate by the fourth starting motor 42 through the second transmission shaft 43, the melted plastic is conveyed and extruded according to the requirement for printing, and the extrusion head 5 can ensure that the two valve cores 54 are tightly propped together under the action of the second spring 53 during non-extrusion, so that the leakage of the melted plastic is prevented from affecting the quality of products.
The control mode of the invention is controlled by manual starting or by the existing automation technology, the wiring diagram of the power element and the supply of the power source are common knowledge in the field, and the invention is mainly used for protecting the mechanical device, so the invention does not explain the control mode and the wiring arrangement in detail.
In the description of the present invention, it should be understood that the terms "coaxial," "bottom," "one end," "top," "middle," "another end," "upper," "one side," "top," "inner," "front," "center," "two ends," etc. indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "configured," "connected," "secured," "screwed," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intermediaries, or in communication with each other or in interaction with each other, unless explicitly defined otherwise, the meaning of the terms described above in this application will be understood by those of ordinary skill in the art in view of the specific circumstances.
While the basic principles and main features of the present invention and advantages of the present invention have been shown and described, it will be understood by those skilled in the art that the present invention is not limited by the foregoing embodiments, which are described in the foregoing specification merely illustrate the principles of the present invention, and various changes and modifications may be made therein without departing from the spirit and scope of the invention, which is defined in the appended claims and their equivalents.
Claims (6)
1. A plastic extrusion device for 3D molding, characterized in that: comprises an input device (1), a melting and conveying device (2), a buffer feeding device (3), an extrusion device (4) and an extrusion head (5);
the input device (1) is fixedly connected to the left upper side of the squeezing device (4);
the top of the melting conveying device (2) is fixedly connected with the bottom of the input device (1), the right side of the melting conveying device (2) is fixedly connected to the left side of the extrusion conveying device (4), an upper side inlet of the melting conveying device (2) is connected with a lower side outlet of the input device (1), and the bottom of the melting conveying device (2) is fixedly connected with a buffering feeding device (3);
the upper inlet of the buffer feeding device (3) is connected with the lower outlet of the melting conveying device (2), and the right outlet of the buffer feeding device (3) is connected with the left inlet of the extruding device (4);
an extrusion head (5) is fixedly connected to the outlet of the lower side of the extrusion device (4);
the specific structure of the buffering feeding device (3) comprises a feeding shell (31), an end cover (32), a motor III (33), a transmission shaft I (34), a spring I (35), a buffering cavity (36), a piston (37), an input port (38), a feeding hole (39), a feeding screw rod (310) and a heating rod II (311);
a transverse buffer cavity (36) is formed in the left center of the feeding shell (31), a transverse feeding hole (39) is formed in the right center of the feeding shell (31), and a right outlet of the feeding hole (39) is connected with a left inlet of the extruding device (4);
an end cover (32) is fixedly connected to the left opening of the buffer cavity (36), an input port (38) is arranged on the upper right side of the buffer cavity (36), and the input port (38) is connected with the lower outlet of the melting conveying device (2);
the left side of the end cover (32) is fixedly connected to a motor III (33);
the left side of the first transmission shaft (34) is movably connected to the inside of the center of the end cover (32), the left side center of the first transmission shaft (34) is fixedly connected with the right side output shaft of the third motor (33), and the right side of the first transmission shaft (34) is movably connected to the center of the buffer cavity (36);
the outside of the piston (37) is transversely and movably connected to the left side of the inside of the buffer cavity (36), the center of the piston (37) is movably connected to the outside of the transmission shaft I (34), and a spring I (35) is arranged between the left side inside of the piston (37) and the right side surface of the end cover (32);
the feeding screw rod (310) is movably connected inside the feeding hole (39), and the left end part of the feeding screw rod (310) is fixedly connected with the right end part of the transmission shaft I (34);
the number of the heating rods II (311) is several, the heating rods II (311) are uniformly positioned around the outer side of the feeding hole (39), and the heating rods II (311) are uniformly and fixedly connected inside the right side of the feeding shell (31);
the specific structure of the input device (1) comprises an input shell (11), a guide hole (12), an inner cavity (13), a driven roller (14), a driving roller (15) and a motor I (16);
the right side of the input shell (11) is internally provided with a vertical guide hole (12), the right lower side of the input shell (11) is internally provided with an inner cavity (13), the inner cavity (13) is communicated with the inner part of the guide hole (12), and the outer part of the rear side of the input shell (11) is fixedly connected with a first motor (16);
the driven roller wheel (14) is movably connected to the right side of the inner cavity (13);
the driving roller (15) is movably connected to the left side of the inner cavity (13), and the center of the rear side of the driving roller (15) is fixedly connected with the output shaft of the motor I (16);
the specific structure of the melting and conveying device (2) comprises a conveying shell (21), a first heating rod (22), a conveying heat conduction wheel (23), a second motor (24), a conveying channel (25) and a circular cavity (26);
a circular cavity (26) is formed in the conveying shell (21), and a motor II (24) is fixedly connected to the outside of the rear side of the conveying shell (21);
the inside of the circular cavity (26) is movably connected with a conveying heat conducting wheel (23), the center of the rear side of the conveying heat conducting wheel (23) is fixedly connected with the output shaft of a motor II (24), and the right side of the circular cavity (26) is provided with a conveying channel (25);
the first heating rods (22) are arranged in a plurality of circular arc shapes, and the first heating rods (22) are fixedly connected in the conveying shell (21) around the circular cavity (26) respectively;
the upper inlet of the conveying channel (25) is connected with the lower outlet of the input device (1), and the lower outlet of the conveying channel (25) is connected with the upper middle inlet of the buffer feeding device (3).
2. A plastic extrusion apparatus for 3D molding as claimed in claim 1, wherein: the first motor (16) is a servo motor or a stepping motor.
3. A plastic extrusion apparatus for 3D molding as claimed in claim 1, wherein: the left side of the feeding hole (39) is in a horn mouth shape.
4. A plastic extrusion apparatus for 3D molding as claimed in claim 1, wherein: the specific structure of the extruding device (4) comprises an extruding shell (41), a motor IV (42), a transmission shaft II (43), a feed inlet (44), an extruding screw rod (45), a heating rod III (46) and an extruding hole (47);
a motor IV (42) is fixedly connected to the inside of the upper side of the squeezing shell (41), and a squeezing hole (47) is formed in the inside of the lower side of the squeezing shell (41);
a feeding hole (44) is formed in the left upper side of the extrusion hole (47), the feeding hole (44) is connected with the right side outlet of the buffer feeding device (3), and the lower side outlet of the extrusion hole (47) is connected with the upper side inlet of the extrusion head (5);
the second transmission shaft (43) is movably connected in a vertical hole arranged on the upper side of the extrusion hole (47), and the center of the upper side of the second transmission shaft (43) is fixedly connected with the output shaft on the lower side of the fourth motor (42);
the extrusion screw rod (45) is movably connected inside the extrusion hole (47), and the upper end part of the extrusion screw rod (45) is fixedly connected with the lower end part of the transmission shaft II (43);
the three heating rods (46) are uniformly arranged around the extrusion hole (47), and the three heating rods (46) are uniformly and fixedly connected inside the periphery of the lower side of the extrusion shell (41).
5. A plastic extrusion apparatus for 3D molding as recited in claim 4, wherein: and the fourth motor (42) is a servo motor or a stepping motor.
6. A plastic extrusion apparatus for 3D molding as claimed in claim 1, wherein: the specific structure of the extrusion head (5) comprises an extrusion shell (51), a groove (52), a second spring (53), a valve core (54), a half-cone hole (55) and an extrusion hole (56);
an extrusion hole (56) is formed in the center of the extrusion shell (51);
grooves (52) are formed in the left side and the right side of the upper side of the extrusion hole (56);
the two valve cores (54) are respectively and movably connected inside the corresponding grooves (52), half-cone holes (55) are formed in the upper surfaces between the opposite inner sides of the two valve cores (54), and springs II (53) are respectively arranged between the opposite outer sides of the two valve cores (54) and the corresponding grooves (52).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202210211341.8A CN114770935B (en) | 2022-03-05 | 2022-03-05 | Plastic extrusion device for 3D molding |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210211341.8A CN114770935B (en) | 2022-03-05 | 2022-03-05 | Plastic extrusion device for 3D molding |
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| CN114770935A CN114770935A (en) | 2022-07-22 |
| CN114770935B true CN114770935B (en) | 2023-04-21 |
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