CN218744862U - Alloy extruder and 3D printing apparatus - Google Patents
Alloy extruder and 3D printing apparatus Download PDFInfo
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- CN218744862U CN218744862U CN202222271777.4U CN202222271777U CN218744862U CN 218744862 U CN218744862 U CN 218744862U CN 202222271777 U CN202222271777 U CN 202222271777U CN 218744862 U CN218744862 U CN 218744862U
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Abstract
The utility model discloses an alloy extruder and 3D printing apparatus, this alloy extruder is used for carrying the masterbatch that is used for shaping amorphous body, alloy extruder includes mount pad, extrusion subassembly, heating module and driving piece, wherein, extrusion subassembly installs in the mount pad, extrusion subassembly includes material pipe and screw rod, the material pipe has feed inlet and discharge gate, the screw rod rotates and installs in the material pipe, the screw rod has the external screw thread, the masterbatch that is used for getting into the material pipe from the feed inlet is extruded from the discharge gate of material pipe; the driving piece is installed on the installation seat and is in transmission connection with the screw rod. The utility model provides a can not produce the crystallization of amorphous body masterbatch of discharge gate output of alloy extruder, the yield is high, and the qualification rate of the amorphous body spare that 3D printing apparatus printed out is high.
Description
Technical Field
The utility model relates to a 3D printing apparatus technical field, in particular to alloy extruder and 3D printing apparatus.
Background
The amorphous body is solidified by super-quenching, atoms are not arranged in order to crystallize when the alloy is solidified, the obtained solid alloy is a long-range disordered structure, molecules (or atoms and ions) forming the alloy are not in a spatially regular periodicity, and crystal grains and crystal boundaries of the crystalline alloy do not exist. The master batch for forming the amorphous body is in contact with oxygen in the air to react to form metal oxide in the process of forming the amorphous body, so that the production yield is low, and oxygen is required to be isolated in the production process.
The existing 3D printing is mainly used for printing plastic parts, but the trend is also for printing amorphous parts, but in the printing process, the master batch of the amorphous parts is easy to contact with oxygen in the air before being extruded to react to form metal oxide, so that the percent of pass of the printed amorphous parts is low.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an alloy extruder aims at solving among the prior art problem that the percent of pass of the amorphous body spare of printing out among the 3D printing apparatus is low.
To achieve the above object, the present invention provides an alloy extruder for conveying a master batch for molding an amorphous body, the alloy extruder comprising:
a mounting base;
the extrusion assembly is installed in the mounting seat and comprises a material pipe and a screw rod, a conveying channel is arranged in the material pipe, and a feeding port and a discharging port are communicated with the conveying channel, the screw rod is installed in the conveying channel in a rotating mode and is provided with external threads, the screw rod is used for enabling a master batch entering the material pipe from the feeding port to be extruded from the discharging port of the material pipe along the axis direction of the conveying channel, a vacuumizing port communicated with the conveying channel is formed in one end, far away from the discharging port, of the material pipe, and the vacuumizing port is communicated with an external vacuumizing machine to guarantee the vacuum degree in the conveying channel.
And the driving piece is arranged on the mounting seat and is in transmission connection with the screw rod.
Optionally, the bottom diameter and the outer diameter of the external thread at one end of the screw close to the discharge port are gradually decreased along the conveying direction of the master batch.
Optionally, the screw comprises a threaded section and a polished rod section which are integrally arranged, and the external thread is arranged on the threaded section;
the extrusion assembly further comprises a piston part, the piston part is hermetically connected with one end, far away from the discharge port, of the material pipe, the piston part comprises a piston cavity and an injection piston, the injection piston is arranged in the piston cavity in a switchable manner between a first position and a second position along the conveying direction of the master batch, a first shaft hole and a second shaft hole which are communicated with the piston cavity are respectively formed in two ends of the piston part along the axial direction of the material pipe, a part of the injection piston extends out of the piston cavity from the first shaft hole to be fixedly connected with the polished rod section, and the injection piston moves along the length direction of the conveying channel to enable one end, far away from the polished rod section, of the thread section to be close to or far away from the discharge port;
one end of the injection piston, which is far away from the material pipe, extends out of the second shaft hole and is in driving connection with a driving piece.
Optionally, the injection piston includes sliding block, first connecting axle and second connecting axle, first connecting axle with the second connecting axle branch is located the sliding block is followed conveying channel axial both sides set up, first connecting axle stretches out first shaft hole with polished rod section fixed connection, the second connecting axle stretch out the second shaft hole with the driving piece drive is connected.
Optionally, a first sealing element is arranged between the peripheral wall of the first connecting shaft and the inner wall of the first shaft hole;
and a second sealing element is arranged between the second connecting shaft and the inner wall of the second shaft hole.
Optionally, the alloy extruder further comprises a heating module, wherein the heating module is arranged on the periphery of the material pipe and is used for heating the master batch in the material pipe;
the heating module comprises a plurality of heating segments; the heating sections are arranged along the length direction of the material pipe; wherein, each heating section can independently control the opening time, the opening duration and the operation power.
Optionally, the discharge port is provided with a discharge valve, and the discharge valve is used for controlling the conduction or the blockage of the discharge port;
the feed inlet is provided with a feed valve, and the feed valve is used for controlling the conduction or the obstruction of the feed inlet.
Optionally, a nozzle is arranged at the discharge port of the material pipe, and the nozzle is connected with the discharge port of the material pipe in a sealing manner.
Optionally, the alloy extruder still includes the check valve, the check valve set up in the material pipe and place in the screw rod is kept away from the one end of feed inlet with between the nozzle, just the check valve with be formed with the buffer memory chamber that is used for buffer memory molten masterbatch between the discharge gate.
The utility model also provides a 3D printing apparatus, including above arbitrary item alloy extruder.
The utility model discloses technical scheme drives the screw rod through the driving piece and rotates, and the masterbatch that gets into from the feed inlet moves ahead along its external screw thread formation's helical coiled passage under the drive of screw rod, extrudes from the discharge gate of material pipe. This application is through setting up the evacuation hole is right before transfer passage fills the master batch, outside evacuation subassembly can carry out vacuum treatment through this evacuation hole to transfer passage, gets rid of unnecessary air in the transfer passage, then close outside evacuation subassembly, lets in the master batch again in the transfer passage to can ensure the master batch and get into behind the transfer passage, no air and master batch contact carry out oxidation reaction in the transfer passage to guarantee the amorphous body yield of alloy extruder output.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic view of an embodiment of the alloy extruder of the present invention.
The reference numbers illustrate:
the realization, the functional characteristics and the advantages of the utility model are further explained by combining the embodiment and referring to the attached drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, back, 8230; \8230;) are provided in the embodiments of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the attached drawings), and if the specific posture is changed, the directional indications are correspondingly changed.
In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory to each other or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The problem of the amorphous part that prints among the prior art 3D printing apparatus the qualification rate is low is solved.
The utility model provides an alloy extruder, this alloy extruder are used for 3D printing apparatus, alloy extruder is used for extruding the masterbatch that is used for the shaping amorphous body.
In one embodiment, as shown in fig. 1, the alloy extruder includes a mounting base 10, an extrusion assembly 20, and a driving member 30, the extrusion assembly 20 is mounted on the mounting base 10, the extrusion assembly 20 includes a material pipe 21 and a screw 22, the material pipe 21 has a conveying channel, and a feed port 211 and a discharge port 212 which are communicated with the conveying channel, the screw 22 is rotatably mounted in the material pipe 21, and the screw 22 has an external thread 221 for extruding the masterbatch entering the material pipe 21 from the feed port 211 out of the discharge port 212 of the material pipe 21; one end of the material pipe 21, which is far away from the discharge hole 212, is provided with a vacuumizing port 213 communicated with the conveying channel, the vacuumizing port 213 is used for being communicated with an external vacuumizing machine so as to ensure the vacuum degree in the conveying channel, the driving part 30 is installed on the installation seat 10 and is in transmission connection with the screw rod 22, and the heating module is arranged on the periphery of the material pipe 21 and used for heating master batch in the material pipe 21.
Optionally, the mounting seat 10 serves as a bearing for mounting the extrusion assembly 20 and the driving member 30, and the mounting seat 10 may be mounted and fixed on the ground or other members to be mounted, which is not limited herein. The material pipe 21 may be in a shape of a circular pipe, and has a straight channel with a circular cross section as a conveying channel for the master batch, although the material pipe 21 may be arranged in a manner that the outer side is square and the inner side is round, and the invention is not limited thereto. The screw 22 is inserted into the material pipe 21 and is in transmission connection with the driving member 30, and is driven by the driving member 30 to rotate, so that the master batch entering the material pipe 21 from the feeding port 211 spirally advances along a spiral channel 222 formed between an external thread 221 of the screw 22 and the inner peripheral wall of the material pipe 21, and is extruded from the discharging port 212, and continuous feeding of the master batch is realized. And because the end of the material pipe 21 far away from the discharge hole 212 is provided with the vacuumizing port 213, before the master batch is filled in the conveying channel, the external vacuumizing assembly can carry out vacuum treatment on the conveying channel through the vacuumizing port 213 to remove redundant air in the conveying channel, then the external vacuumizing assembly is closed, and the master batch is introduced into the conveying channel. Therefore, after the master batch enters the conveying channel, no air is in contact with the master batch in the conveying channel to carry out oxidation reaction, so that the amorphous master batch output by the alloy extruder is prevented from being crystallized, and the yield is high.
It should be noted that, the external vacuum-pumping machine may be operated by vacuumizing and introducing inert gas into the material tube 21 of the alloy extruder through the vacuum-pumping port 213 before and/or during use, so as to ensure that the conveying channel in the material tube 21 is kept in an oxygen-free environment during the process of conveying the molded amorphous masterbatch, so that the masterbatch is not crystallized during the process of conveying the masterbatch from the feed port 211 to the discharge port 212, and further improve the yield, so that the 3D printing apparatus using the alloy extruder can print amorphous parts with high yield.
Wherein, the driving member 30 can be a motor.
In one embodiment, the bottom diameter and the outer diameter of the section of the external thread 221 of the screw 22 close to the discharge hole 212 are gradually decreased in the material conveying direction.
It should be noted that the smaller the base diameter and the outer diameter of the external thread 221 of the screw 22, i.e. the narrower the spiral channel 222 between the external thread 221 and the inner wall of the material pipe 21, and the shallower the depth, the smaller the size of the spiral channel formed between the external thread 221 and the inner peripheral wall of the material pipe, and the less the material is conveyed per unit time. For convenience of description, the section of the screw 22 in which the base diameter and the outer diameter of the external thread 221 are gradually decreased along the material conveying direction is defined as a compression section, and when the master batch is conveyed to the compression section of the screw 22 through the screw 22, the following master batch extrudes the preceding master batch, so that the density of the master batch at the discharge port 212 part of the material pipe 21 is high, no gap exists between the master batches, and gas is prevented from being doped in the master batch to cause crystallization of the master batch.
In one embodiment, the screw 22 comprises a threaded section 22a and a polished rod section 22b which are integrally arranged, and the external thread 221 is arranged on the threaded section 22a; the extrusion assembly 20 further includes a piston portion 80, the piston portion 80 is hermetically connected to an end of the material pipe 21 away from the discharge port 212, the piston portion 80 includes a piston cavity 810, and an injection piston 820 disposed in the piston cavity 810 in a switchable manner between a first position and a second position along a conveying direction of the master batch, two ends of the piston portion 80 along an axial direction of the material pipe 21 are respectively provided with a first shaft hole and a second shaft hole communicated with the piston cavity 810, a portion of the injection piston 820 extends out of the piston cavity 810 from the first shaft hole to be fixedly connected with the polished rod section 22b, and the injection piston 820 moves along the axial direction of the material pipe 21 to enable an end of the threaded section 221 away from the polished rod section 222 to be close to or away from the discharge port 212; one end of the injection piston 820, which is far away from the material pipe 21, extends out of the second shaft hole and is in driving connection with a driving member 30.
It will be appreciated that if the alloy extruder is operated in an inert environment, the operating costs are high and the safety factor of operation is low. Therefore, the screw conveying is generally performed in a manner that the material pipe 21 is kept in an oxygen-free environment during the conveying of the master batch. It should be noted that the masterbatch is generally stored in a vacuum or inert environment, and the external masterbatch enters the material pipe 21 from the feeding hole 211 in a sealed manner, so that external air cannot enter the material pipe 21 from the feeding hole 211. Since the screw 22 itself has a smaller diameter than the inner diameter of the material pipe 21, a gap between the polished rod section 22b of the screw 22 and the inner wall of the material pipe 21 is large, and external air may enter the material pipe 21 from the gap therebetween, resulting in crystallization of the master batch. Therefore, in this embodiment, by additionally providing a piston portion 80 at an end of the material pipe 21 away from the discharge port 212 for sealing another opening of the material pipe 21, the piston portion 80 may be integrally formed with the material pipe 21, or may be fixed by screws or welding, which is not limited herein.
As shown in the figure, it can be understood that a buffer space exists between one end of the screw 22 close to the discharge port 212 and the discharge port 212 of the material pipe 21, and for convenience of description, the buffer space is defined as a buffer cavity 213, the buffer cavity 213 is a part of the conveying channel, and the buffer cavity 213 is used for buffering the master batch. The driving part 30 drives the injection piston to rotate, and then drives the screw 22 to rotate so as to drive the master batch to be conveyed from the feeding hole 211 to the buffer cavity 213, and along with the continuous increase of the master batch in the buffer cavity 213, the master batch is pushed out of the conveying channel from the discharging hole 212 under the continuous movement of the screw 22, so that the feeding of the material pipe 21 is completed. In addition, the injection piston can also move along the axial direction of the conveying channel, so that the size of the buffer cavity 213 is adjusted, a user can adjust the stock of the master batch in the feeding cavity 111 according to the actual production condition, meanwhile, the master batch in the buffer cavity 213 can be injected and ejected quickly, and the extrusion efficiency of the master batch is improved.
In an embodiment, as shown in the figure, the injection piston 820 includes a sliding block 821, a first connecting shaft 822 and a second connecting shaft 823, the first connecting shaft 822 and the second connecting shaft 823 are respectively disposed on two sides of the sliding block 821 in the axial direction of the conveying channel, the first connecting shaft 822 passes through the shaft hole to be fixedly connected with the light rod section 22b, and the second connecting shaft 823 extends out of the second shaft hole to be drivingly connected with the driving member 30.
Optionally, the sliding block 821 may be a disc shape, the first connecting shaft 822 and the second connecting shaft 823 are respectively disposed at two ends of the sliding block 821 in the moving direction, the sliding block 821 divides the piston cavity 810 into a first cavity and a second cavity, and the sliding block 821 is pushed to slide in the piston cavity 810 by changing pressures in the first cavity and the second cavity, so as to further drive the screw 22 to move along the conveying direction, thereby achieving the purpose of adjusting the size of the buffer cavity 213. The first connecting shaft 822 may be fixed to the polished rod segment 22b by a coupling, or may be fixed to the polished rod segment by other means, which is not limited herein.
In one embodiment, a first sealing element is disposed between the outer peripheral wall of the first connecting shaft 822 and the inner wall of the first shaft hole; a second sealing member is disposed between the second connecting shaft 823 and the inner wall of the second shaft hole.
Optionally, a first annular groove is formed in the inner circumferential wall of the first shaft hole, the first sealing element may be an annular sealing ring, and the first annular groove is clamped in the first annular groove and sleeved on the first connecting shaft, so that the gas in the piston chamber 810 can be prevented from seeping out from the gap between the first connecting shaft 822 and the first shaft hole, the vacuum degree in the conveying passage is further ensured, and meanwhile, the movement of the piston part 80 is more reliable. Accordingly, the second connection shaft 823 and the second shaft hole are provided with a second sealing member to ensure reliability of the second cavity.
Wherein, first sealing washer and second sealing washer all can select for use O type circle.
In an embodiment, the alloy extruder further includes a heating module 70, and the heating module 70 is disposed on the outer periphery of the material pipe 21 to heat the masterbatch in the material pipe 21.
When the alloy extruder is operated by screw feeding only, the masterbatch entering the feed pipe 21 from the feed port 211 needs to be in a molten state, that is, another process is required to heat and melt the masterbatch, the production process is complicated, and the molten masterbatch is extremely easy to crystallize in contact with air, so that the material output from the alloy extruder is easily wasted. To this end, in this embodiment, the heating module 70 is disposed on the outer peripheral wall of the material pipe 21, and is configured to heat and melt the material in the material pipe 21, at this time, the masterbatch conveyed into the material pipe 21 may be in a solid particle shape, and after the granular masterbatch enters the material pipe 21, the granular masterbatch is gradually melted under the action of the heating module 70 while spirally advancing toward the discharge port 212 under the rotation of the screw 22, so that the melting and conveying processes of the granular masterbatch can be realized in one step by the alloy extruder, the production process thereof is saved, and the production efficiency is improved.
It should be noted that, since the granular master batch itself has a certain molecular gap, during the melting process, the gas in the molecular gap will overflow and move backwards, and will not contact with the molten master batch. Meanwhile, the bottom diameter and the outer diameter of the section of the external thread 221 of the screw 22 close to the discharge port 212 are gradually decreased along the material conveying direction, so that the molten master batch conveyed to the position close to the discharge port 212 of the material pipe 21 does not have the possibility of reacting with the gas overflowing from the molecular gap, and the discharge port 212 of the material pipe 21 is further ensured to output the uncrystallized molten master batch.
Further, the periphery of the heating module 70 is provided with a heat-insulating layer, so that the heat generated by the heating module 70 is prevented from overflowing, the safety performance of the heating module is improved, and the utilization efficiency of the heating module 70 is improved.
Preferably, the heating module 70 includes a plurality of heating segments 710; the plurality of heating sections 710 are arranged along the length direction of the material pipe 21; each of the heating sections 710 may independently control the turn-on time, the turn-on duration, and the operation power.
The heating device 300 is sleeved outside the material pipe 21 and is used for heating the master batch in the material pipe 21 to obtain molten liquid master batch; preferably, in order to obtain a better quality of the molten liquid masterbatch, the heating device 300 performs stepwise and stepwise heating on the material pipe 21.
In order to more clearly illustrate that the heating device 300 performs stepwise and segmented heating on the material pipe 21, in an exemplary embodiment, the alloy extruder further includes a main machine, the main machine is connected to the heating module 70 in a communication manner, the heating module 70 includes a plurality of heating segments 311, the plurality of heating segments 311 are arranged along the length direction of the material pipe 21, and each heating segment 311 can independently control the opening timing, the opening duration, and the magnitude of the operating power. Therefore, the on-time and the operating power of each heating section 311 of the heating device 300 can be controlled by the host.
It is understood that, in this embodiment, the heating module 70 may be provided with a heating section 710 with a gradually increasing temperature along the conveying direction of the masterbatch, and the temperature of a plurality of the heating sections 710 may be gradually increased, or may be maintained in the same heating section after being partially increased, which is not limited herein. In this way, the granular master batch is gradually melted, and the gas in the intermolecular space of the granular master batch is gradually overflowed, so that the master batch 20 in the molten state is ensured not to contact with the air. Meanwhile, the heating module 70 is divided into a plurality of heating sections 710, so that the temperature can be better controlled in the heating process, the granular master batch is completely melted, and the problem of pipe blockage is prevented.
Alternatively, the heating module 70 may include 2, 3, 4, 5, 6, 7, 8, 9, 10, etc. heating sections 710, which are not particularly limited herein. The present application is described by taking an example that the heating module 70 includes four heating sections, and other embodiments may be set forth with reference to the present embodiment.
In one embodiment, the discharge port 212 is provided with a discharge valve, and the discharge valve is used for controlling the conduction or the blockage of the discharge port 212; the feed inlet 211 is provided with a feed valve, and the feed valve is used for opening the conduction or the obstruction of the feed inlet 211.
Optionally, the discharge valve and the feed valve may be gate valves, valve members such as butterfly valves, electric valves, etc., or plugs, etc., and are not limited herein. In this embodiment, the discharge valve may be a piston, when in use, before the material pipe 21 is vacuumized, the feed port 211 may be blocked by the feed valve, such as a valve, a piston, or a sealing plug, and meanwhile, the discharge port 212 may be blocked by the discharge valve, such as a valve, a piston, or a sealing plug, so as to ensure the sealing property of the conveying channel, and then the conveying channel is subjected to vacuum pumping treatment, after the conveying channel reaches a vacuum state or a vacuum degree reaches a set value, the protective gas assembly may be further used to fill the conveying channel with a protective gas, the conveying channel is isolated from air by the protective gas, and meanwhile, the pressure in the conveying channel is ensured to be stable, so that the master batch is pushed more smoothly; the air remaining in the gap between the master batch can also be pressed out of the tapping pipe 21 by the protective gas. The protective gas may be an inert gas having a density higher than that of air, and is not particularly limited. The utility model discloses with protective gas explains for the argon gas, and other implementations can be implemented with reference to this embodiment.
In an embodiment, the discharge port 212 of the material pipe 21 is provided with a nozzle 50, and the nozzle 50 is connected with the discharge port 212 of the material pipe 21 in a sealing manner.
Alternatively, the material pipe 21 may be integrally formed with the material pipe 21, or may be fixed by welding or screwing, which is not limited herein. The inner wall surface of the nozzle 50 is in a cone shape with a small front end and a large rear end, the rear end of the nozzle 50 is fixedly connected with the discharge hole 212 of the material pipe 21, and the inner wall surface of the rear end of the nozzle 50 and the inner wall surface of the material pipe 21 are arranged in the same plane, so that the injection pressure of the master batch entering the die from the nozzle 50 is larger.
In an embodiment, the alloy extruder further includes a check valve 60, the check valve 60 is disposed in the material pipe 21 and is disposed between one end of the screw 22 away from the feed inlet 211 and the nozzle 50, and a buffer chamber 213 for buffering the molten masterbatch is formed between the check valve 60 and the discharge outlet 212. The check valve 60 serves to prevent backflow of the molten masterbatch within the nozzle 50.
The utility model also provides a 3D printing apparatus, including this alloy extruder, arbitrary embodiment above is referred to the concrete structure of alloy extruder, because this 3D printing apparatus has adopted the whole technical scheme of above-mentioned all embodiments, consequently has all beneficial effects that the technical scheme of above-mentioned embodiment brought at least, and the repeated description is no longer given here.
The above only be the preferred embodiment of the utility model discloses a not consequently restriction the patent scope of the utility model, all be in the utility model discloses a under the design, utilize the equivalent structure transform of what the content of the description and the attached drawing was done, or direct/indirect application all includes in other relevant technical field the utility model discloses a patent protection is within range.
Claims (10)
1. An alloy extruder for a 3D printing apparatus for extruding a masterbatch for forming an amorphous body, the alloy extruder comprising:
a mounting base;
the extrusion assembly is arranged on the mounting seat and comprises a material pipe and a screw rod, a conveying channel, a feeding port and a discharging port are arranged in the material pipe, the feeding port and the discharging port are communicated with the conveying channel, the screw rod is rotatably arranged in the conveying channel and is provided with external threads for extruding master batch entering the material pipe from the feeding port from the discharging port of the material pipe along the axial direction of the conveying channel, one end, far away from the discharging port, of the material pipe is provided with a vacuumizing port communicated with the conveying channel, and the vacuumizing port is communicated with an external vacuumizing machine to ensure the vacuum degree in the conveying channel;
and the driving piece is arranged on the mounting seat and is in transmission connection with the screw rod.
2. The alloy extruder according to claim 1, wherein the bottom diameter and the outer diameter of the external thread at one end of the screw close to the discharge port are gradually decreased in the conveying direction of the master batch.
3. The alloy extruder of claim 1, wherein the screw comprises a screw section and a polished rod section that are integrally provided, the external thread being provided to the screw section;
the extrusion assembly further comprises a piston part, the piston part is hermetically connected with one end, far away from the discharge port, of the material pipe, the piston part comprises a piston cavity and an injection piston, the injection piston is arranged in the piston cavity in a switchable manner between a first position and a second position along the conveying direction of the master batch, a first shaft hole and a second shaft hole which are communicated with the piston cavity are respectively formed in two ends of the piston part along the axial direction of the material pipe, a part of the injection piston extends out of the piston cavity from the first shaft hole to be fixedly connected with the polished rod section, and the injection piston moves along the length direction of the conveying channel to enable one end, far away from the polished rod section, of the thread section to be close to or far away from the discharge port;
one end of the injection piston, which is deviated from the material pipe, extends out of the second shaft hole and is in driving connection with a driving piece.
4. The alloy extruder of claim 3, wherein the injection piston comprises a sliding block, a first connecting shaft and a second connecting shaft, the first connecting shaft and the second connecting shaft are respectively arranged on the sliding block along two axial sides of the conveying channel, the first connecting shaft extends out of the first shaft hole and is fixedly connected with the polished rod section, and the second connecting shaft extends out of the second shaft hole and is in driving connection with the driving piece.
5. The alloy extruder according to claim 4, wherein a first seal member is provided between an outer peripheral wall of the first connecting shaft and an inner wall of the first shaft hole;
and a second sealing element is arranged between the second connecting shaft and the inner wall of the second shaft hole.
6. The alloy extruder according to claim 1, further comprising a heating module disposed at an outer periphery of the feed pipe for heating the master batch in the feed pipe;
the heating module comprises a plurality of heating segments; the plurality of heating sections are arranged along the length direction of the material pipe; wherein, each heating section can independently control the opening time, the opening duration and the operation power.
7. The alloy extruder according to claim 1, wherein the discharge port is provided with a discharge valve, and the discharge valve is used for controlling the conduction or the blockage of the discharge port;
the feed inlet is provided with a feed valve, and the feed valve is used for controlling the conduction or the obstruction of the feed inlet.
8. The alloy extruder according to claim 1, wherein the discharge port of the material pipe is provided with a nozzle, and the nozzle is hermetically connected with the discharge port of the material pipe.
9. The alloy extruder according to claim 8, further comprising a check valve disposed in the feed pipe and between an end of the screw remote from the feed port and the nozzle, and a buffer chamber for buffering the molten master batch is formed between the check valve and the discharge port.
10. 3D printing apparatus, comprising an alloy extruder according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222271777.4U CN218744862U (en) | 2022-08-26 | 2022-08-26 | Alloy extruder and 3D printing apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222271777.4U CN218744862U (en) | 2022-08-26 | 2022-08-26 | Alloy extruder and 3D printing apparatus |
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| Publication Number | Publication Date |
|---|---|
| CN218744862U true CN218744862U (en) | 2023-03-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222271777.4U Active CN218744862U (en) | 2022-08-26 | 2022-08-26 | Alloy extruder and 3D printing apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218744862U (en) |
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2022
- 2022-08-26 CN CN202222271777.4U patent/CN218744862U/en active Active
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